404 Not Found

Viewing / Editing File: ID3.tar

module.tag.lyrics3.php������������������������������������������������������������������������������0000644�����������������00000027404�15150061000�0010676 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������<?php

/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org>               //
//  available at https://github.com/JamesHeinrich/getID3       //
//            or https://www.getid3.org                        //
//            or http://getid3.sourceforge.net                 //
//  see readme.txt for more details                            //
/////////////////////////////////////////////////////////////////
///                                                            //
// module.tag.lyrics3.php                                      //
// module for analyzing Lyrics3 tags                           //
// dependencies: module.tag.apetag.php (optional)              //
//                                                            ///
/////////////////////////////////////////////////////////////////

if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
	exit;
}
class getid3_lyrics3 extends getid3_handler
{
	/**
	 * @return bool
	 */
	public function Analyze() {
		$info = &$this->getid3->info;

// http://www.volweb.cz/str/tags.htm

if (!getid3_lib::intValueSupported($info['filesize'])) {
			$this->warning('Unable to check for Lyrics3 because file is larger than '.round(PHP_INT_MAX / 1073741824).'GB');
			return false;
		}

$this->fseek((0 - 128 - 9 - 6), SEEK_END);          // end - ID3v1 - "LYRICSEND" - [Lyrics3size]
		$lyrics3offset = null;
		$lyrics3version = null;
		$lyrics3size   = null;
		$lyrics3_id3v1 = $this->fread(128 + 9 + 6);
		$lyrics3lsz    = (int) substr($lyrics3_id3v1, 0, 6); // Lyrics3size
		$lyrics3end    = substr($lyrics3_id3v1,  6,   9); // LYRICSEND or LYRICS200
		$id3v1tag      = substr($lyrics3_id3v1, 15, 128); // ID3v1

if ($lyrics3end == 'LYRICSEND') {
			// Lyrics3v1, ID3v1, no APE

$lyrics3size    = 5100;
			$lyrics3offset  = $info['filesize'] - 128 - $lyrics3size;
			$lyrics3version = 1;

} elseif ($lyrics3end == 'LYRICS200') {
			// Lyrics3v2, ID3v1, no APE

// LSZ = lyrics + 'LYRICSBEGIN'; add 6-byte size field; add 'LYRICS200'
			$lyrics3size    = $lyrics3lsz + 6 + strlen('LYRICS200');
			$lyrics3offset  = $info['filesize'] - 128 - $lyrics3size;
			$lyrics3version = 2;

} elseif (substr(strrev($lyrics3_id3v1), 0, 9) == strrev('LYRICSEND')) {
			// Lyrics3v1, no ID3v1, no APE

$lyrics3size    = 5100;
			$lyrics3offset  = $info['filesize'] - $lyrics3size;
			$lyrics3version = 1;
			$lyrics3offset  = $info['filesize'] - $lyrics3size;

} elseif (substr(strrev($lyrics3_id3v1), 0, 9) == strrev('LYRICS200')) {

// Lyrics3v2, no ID3v1, no APE

$lyrics3size    = (int) strrev(substr(strrev($lyrics3_id3v1), 9, 6)) + 6 + strlen('LYRICS200'); // LSZ = lyrics + 'LYRICSBEGIN'; add 6-byte size field; add 'LYRICS200'
			$lyrics3offset  = $info['filesize'] - $lyrics3size;
			$lyrics3version = 2;

} else {

if (isset($info['ape']['tag_offset_start']) && ($info['ape']['tag_offset_start'] > 15)) {

$this->fseek($info['ape']['tag_offset_start'] - 15);
				$lyrics3lsz = $this->fread(6);
				$lyrics3end = $this->fread(9);

if ($lyrics3end == 'LYRICSEND') {
					// Lyrics3v1, APE, maybe ID3v1

$lyrics3size    = 5100;
					$lyrics3offset  = $info['ape']['tag_offset_start'] - $lyrics3size;
					$info['avdataend'] = $lyrics3offset;
					$lyrics3version = 1;
					$this->warning('APE tag located after Lyrics3, will probably break Lyrics3 compatability');

} elseif ($lyrics3end == 'LYRICS200') {
					// Lyrics3v2, APE, maybe ID3v1

$lyrics3size    = $lyrics3lsz + 6 + strlen('LYRICS200'); // LSZ = lyrics + 'LYRICSBEGIN'; add 6-byte size field; add 'LYRICS200'
					$lyrics3offset  = $info['ape']['tag_offset_start'] - $lyrics3size;
					$lyrics3version = 2;
					$this->warning('APE tag located after Lyrics3, will probably break Lyrics3 compatability');

}

if (isset($lyrics3offset) && isset($lyrics3version) && isset($lyrics3size)) {
			$info['avdataend'] = $lyrics3offset;
			$this->getLyrics3Data($lyrics3offset, $lyrics3version, $lyrics3size);

if (!isset($info['ape'])) {
				if (isset($info['lyrics3']['tag_offset_start'])) {
					$GETID3_ERRORARRAY = &$info['warning'];
					if ($this->getid3->option_tag_apetag) {
						getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.tag.apetag.php', __FILE__, true);
						$getid3_temp = new getID3();
						$getid3_temp->openfile($this->getid3->filename, $this->getid3->info['filesize'], $this->getid3->fp);
						$getid3_apetag = new getid3_apetag($getid3_temp);
						$getid3_apetag->overrideendoffset = $info['lyrics3']['tag_offset_start'];
						$getid3_apetag->Analyze();
						if (!empty($getid3_temp->info['ape'])) {
							$info['ape'] = $getid3_temp->info['ape'];
						}
						if (!empty($getid3_temp->info['replay_gain'])) {
							$info['replay_gain'] = $getid3_temp->info['replay_gain'];
						}
						unset($getid3_temp, $getid3_apetag);
					} else {
						$this->warning('Unable to check for Lyrics3 and APE tags interaction since option_tag_apetag=FALSE');
					}
				} else {
					$this->warning('Lyrics3 and APE tags appear to have become entangled (most likely due to updating the APE tags with a non-Lyrics3-aware tagger)');
				}
			}

}

return true;
	}

/**
	 * @param int $endoffset
	 * @param int $version
	 * @param int $length
	 *
	 * @return bool
	 */
	public function getLyrics3Data($endoffset, $version, $length) {
		// http://www.volweb.cz/str/tags.htm

$info = &$this->getid3->info;

if (!getid3_lib::intValueSupported($endoffset)) {
			$this->warning('Unable to check for Lyrics3 because file is larger than '.round(PHP_INT_MAX / 1073741824).'GB');
			return false;
		}

$this->fseek($endoffset);
		if ($length <= 0) {
			return false;
		}
		$rawdata = $this->fread($length);

$ParsedLyrics3 = array();

$ParsedLyrics3['raw']['lyrics3version'] = $version;
		$ParsedLyrics3['raw']['lyrics3tagsize'] = $length;
		$ParsedLyrics3['tag_offset_start']      = $endoffset;
		$ParsedLyrics3['tag_offset_end']        = $endoffset + $length - 1;

if (substr($rawdata, 0, 11) != 'LYRICSBEGIN') {
			if (strpos($rawdata, 'LYRICSBEGIN') !== false) {

$this->warning('"LYRICSBEGIN" expected at '.$endoffset.' but actually found at '.($endoffset + strpos($rawdata, 'LYRICSBEGIN')).' - this is invalid for Lyrics3 v'.$version);
				$info['avdataend'] = $endoffset + strpos($rawdata, 'LYRICSBEGIN');
				$rawdata = substr($rawdata, strpos($rawdata, 'LYRICSBEGIN'));
				$length = strlen($rawdata);
				$ParsedLyrics3['tag_offset_start'] = $info['avdataend'];
				$ParsedLyrics3['raw']['lyrics3tagsize'] = $length;

} else {

$this->error('"LYRICSBEGIN" expected at '.$endoffset.' but found "'.substr($rawdata, 0, 11).'" instead');
				return false;

}

switch ($version) {

case 1:
				if (substr($rawdata, strlen($rawdata) - 9, 9) == 'LYRICSEND') {
					$ParsedLyrics3['raw']['LYR'] = trim(substr($rawdata, 11, strlen($rawdata) - 11 - 9));
					$this->Lyrics3LyricsTimestampParse($ParsedLyrics3);
				} else {
					$this->error('"LYRICSEND" expected at '.($this->ftell() - 11 + $length - 9).' but found "'.substr($rawdata, strlen($rawdata) - 9, 9).'" instead');
					return false;
				}
				break;

case 2:
				if (substr($rawdata, strlen($rawdata) - 9, 9) == 'LYRICS200') {
					$ParsedLyrics3['raw']['unparsed'] = substr($rawdata, 11, strlen($rawdata) - 11 - 9 - 6); // LYRICSBEGIN + LYRICS200 + LSZ
					$rawdata = $ParsedLyrics3['raw']['unparsed'];
					while (strlen($rawdata) > 0) {
						$fieldname = substr($rawdata, 0, 3);
						$fieldsize = (int) substr($rawdata, 3, 5);
						$ParsedLyrics3['raw'][$fieldname] = substr($rawdata, 8, $fieldsize);
						$rawdata = substr($rawdata, 3 + 5 + $fieldsize);
					}

if (isset($ParsedLyrics3['raw']['IND'])) {
						$i = 0;
						$flagnames = array('lyrics', 'timestamps', 'inhibitrandom');
						foreach ($flagnames as $flagname) {
							if (strlen($ParsedLyrics3['raw']['IND']) > $i++) {
								$ParsedLyrics3['flags'][$flagname] = $this->IntString2Bool(substr($ParsedLyrics3['raw']['IND'], $i, 1 - 1));
							}
						}
					}

$fieldnametranslation = array('ETT'=>'title', 'EAR'=>'artist', 'EAL'=>'album', 'INF'=>'comment', 'AUT'=>'author');
					foreach ($fieldnametranslation as $key => $value) {
						if (isset($ParsedLyrics3['raw'][$key])) {
							$ParsedLyrics3['comments'][$value][] = trim($ParsedLyrics3['raw'][$key]);
						}
					}

if (isset($ParsedLyrics3['raw']['IMG'])) {
						$imagestrings = explode("\r\n", $ParsedLyrics3['raw']['IMG']);
						foreach ($imagestrings as $key => $imagestring) {
							if (strpos($imagestring, '||') !== false) {
								$imagearray = explode('||', $imagestring);
								$ParsedLyrics3['images'][$key]['filename']     =                                $imagearray[0];
								$ParsedLyrics3['images'][$key]['description']  =                                (isset($imagearray[1]) ? $imagearray[1] : '');
								$ParsedLyrics3['images'][$key]['timestamp']    = $this->Lyrics3Timestamp2Seconds(isset($imagearray[2]) ? $imagearray[2] : '');
							}
						}
					}
					if (isset($ParsedLyrics3['raw']['LYR'])) {
						$this->Lyrics3LyricsTimestampParse($ParsedLyrics3);
					}
				} else {
					$this->error('"LYRICS200" expected at '.($this->ftell() - 11 + $length - 9).' but found "'.substr($rawdata, strlen($rawdata) - 9, 9).'" instead');
					return false;
				}
				break;

default:
				$this->error('Cannot process Lyrics3 version '.$version.' (only v1 and v2)');
				return false;
		}

if (isset($info['id3v1']['tag_offset_start']) && ($info['id3v1']['tag_offset_start'] <= $ParsedLyrics3['tag_offset_end'])) {
			$this->warning('ID3v1 tag information ignored since it appears to be a false synch in Lyrics3 tag data');
			unset($info['id3v1']);
			foreach ($info['warning'] as $key => $value) {
				if ($value == 'Some ID3v1 fields do not use NULL characters for padding') {
					unset($info['warning'][$key]);
					sort($info['warning']);
					break;
				}
			}
		}

$info['lyrics3'] = $ParsedLyrics3;

return true;
	}

/**
	 * @param string $rawtimestamp
	 *
	 * @return int|false
	 */
	public function Lyrics3Timestamp2Seconds($rawtimestamp) {
		if (preg_match('#^\\[([0-9]{2}):([0-9]{2})\\]$#', $rawtimestamp, $regs)) {
			return (int) (((int) $regs[1] * 60) + (int) $regs[2]);
		}
		return false;
	}

/**
	 * @param array $Lyrics3data
	 *
	 * @return bool
	 */
	public function Lyrics3LyricsTimestampParse(&$Lyrics3data) {
		$lyricsarray = explode("\r\n", $Lyrics3data['raw']['LYR']);
		$notimestamplyricsarray = array();
		foreach ($lyricsarray as $key => $lyricline) {
			$regs = array();
			$thislinetimestamps = array();
			while (preg_match('#^(\\[[0-9]{2}:[0-9]{2}\\])#', $lyricline, $regs)) {
				$thislinetimestamps[] = $this->Lyrics3Timestamp2Seconds($regs[0]);
				$lyricline = str_replace($regs[0], '', $lyricline);
			}
			$notimestamplyricsarray[$key] = $lyricline;
			if (count($thislinetimestamps) > 0) {
				sort($thislinetimestamps);
				foreach ($thislinetimestamps as $timestampkey => $timestamp) {
					if (isset($Lyrics3data['comments']['synchedlyrics'][$timestamp])) {
						// timestamps only have a 1-second resolution, it's possible that multiple lines
						// could have the same timestamp, if so, append
						$Lyrics3data['comments']['synchedlyrics'][$timestamp] .= "\r\n".$lyricline;
					} else {
						$Lyrics3data['comments']['synchedlyrics'][$timestamp] = $lyricline;
					}
				}
			}
		}
		$Lyrics3data['comments']['unsynchedlyrics'][0] = implode("\r\n", $notimestamplyricsarray);
		if (isset($Lyrics3data['comments']['synchedlyrics']) && is_array($Lyrics3data['comments']['synchedlyrics'])) {
			ksort($Lyrics3data['comments']['synchedlyrics']);
		}
		return true;
	}

/**
	 * @param string $char
	 *
	 * @return bool|null
	 */
	public function IntString2Bool($char) {
		if ($char == '1') {
			return true;
		} elseif ($char == '0') {
			return false;
		}
		return null;
	}
}
������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������module.audio.dts.php��������������������������������������������������������������������������������0000644�����������������00000025206�15150061000�0010424 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������<?php

/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org>               //
//  available at https://github.com/JamesHeinrich/getID3       //
//            or https://www.getid3.org                        //
//            or http://getid3.sourceforge.net                 //
//  see readme.txt for more details                            //
/////////////////////////////////////////////////////////////////
//                                                             //
// module.audio.dts.php                                        //
// module for analyzing DTS Audio files                        //
// dependencies: NONE                                          //
//                                                             //
/////////////////////////////////////////////////////////////////

if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
	exit;
}

/**
* @tutorial http://wiki.multimedia.cx/index.php?title=DTS
*/
class getid3_dts extends getid3_handler
{
	/**
	 * Default DTS syncword used in native .cpt or .dts formats.
	 */
	const syncword = "\x7F\xFE\x80\x01";

/**
	 * @var int
	 */
	private $readBinDataOffset = 0;

/**
	 * Possible syncwords indicating bitstream encoding.
	 */
	public static $syncwords = array(
		0 => "\x7F\xFE\x80\x01",  // raw big-endian
		1 => "\xFE\x7F\x01\x80",  // raw little-endian
		2 => "\x1F\xFF\xE8\x00",  // 14-bit big-endian
		3 => "\xFF\x1F\x00\xE8"); // 14-bit little-endian

/**
	 * @return bool
	 */
	public function Analyze() {
		$info = &$this->getid3->info;
		$info['fileformat'] = 'dts';

$this->fseek($info['avdataoffset']);
		$DTSheader = $this->fread(20); // we only need 2 words magic + 6 words frame header, but these words may be normal 16-bit words OR 14-bit words with 2 highest bits set to zero, so 8 words can be either 8*16/8 = 16 bytes OR 8*16*(16/14)/8 = 18.3 bytes

// check syncword
		$sync = substr($DTSheader, 0, 4);
		if (($encoding = array_search($sync, self::$syncwords)) !== false) {

$info['dts']['raw']['magic'] = $sync;
			$this->readBinDataOffset = 32;

} elseif ($this->isDependencyFor('matroska')) {

// Matroska contains DTS without syncword encoded as raw big-endian format
			$encoding = 0;
			$this->readBinDataOffset = 0;

} else {

unset($info['fileformat']);
			return $this->error('Expecting "'.implode('| ', array_map('getid3_lib::PrintHexBytes', self::$syncwords)).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($sync).'"');

}

// decode header
		$fhBS = '';
		for ($word_offset = 0; $word_offset <= strlen($DTSheader); $word_offset += 2) {
			switch ($encoding) {
				case 0: // raw big-endian
					$fhBS .=        getid3_lib::BigEndian2Bin(       substr($DTSheader, $word_offset, 2) );
					break;
				case 1: // raw little-endian
					$fhBS .=        getid3_lib::BigEndian2Bin(strrev(substr($DTSheader, $word_offset, 2)));
					break;
				case 2: // 14-bit big-endian
					$fhBS .= substr(getid3_lib::BigEndian2Bin(       substr($DTSheader, $word_offset, 2) ), 2, 14);
					break;
				case 3: // 14-bit little-endian
					$fhBS .= substr(getid3_lib::BigEndian2Bin(strrev(substr($DTSheader, $word_offset, 2))), 2, 14);
					break;
			}
		}

$info['dts']['raw']['frame_type']             =        $this->readBinData($fhBS,  1);
		$info['dts']['raw']['deficit_samples']        =        $this->readBinData($fhBS,  5);
		$info['dts']['flags']['crc_present']          = (bool) $this->readBinData($fhBS,  1);
		$info['dts']['raw']['pcm_sample_blocks']      =        $this->readBinData($fhBS,  7);
		$info['dts']['raw']['frame_byte_size']        =        $this->readBinData($fhBS, 14);
		$info['dts']['raw']['channel_arrangement']    =        $this->readBinData($fhBS,  6);
		$info['dts']['raw']['sample_frequency']       =        $this->readBinData($fhBS,  4);
		$info['dts']['raw']['bitrate']                =        $this->readBinData($fhBS,  5);
		$info['dts']['flags']['embedded_downmix']     = (bool) $this->readBinData($fhBS,  1);
		$info['dts']['flags']['dynamicrange']         = (bool) $this->readBinData($fhBS,  1);
		$info['dts']['flags']['timestamp']            = (bool) $this->readBinData($fhBS,  1);
		$info['dts']['flags']['auxdata']              = (bool) $this->readBinData($fhBS,  1);
		$info['dts']['flags']['hdcd']                 = (bool) $this->readBinData($fhBS,  1);
		$info['dts']['raw']['extension_audio']        =        $this->readBinData($fhBS,  3);
		$info['dts']['flags']['extended_coding']      = (bool) $this->readBinData($fhBS,  1);
		$info['dts']['flags']['audio_sync_insertion'] = (bool) $this->readBinData($fhBS,  1);
		$info['dts']['raw']['lfe_effects']            =        $this->readBinData($fhBS,  2);
		$info['dts']['flags']['predictor_history']    = (bool) $this->readBinData($fhBS,  1);
		if ($info['dts']['flags']['crc_present']) {
			$info['dts']['raw']['crc16']              =        $this->readBinData($fhBS, 16);
		}
		$info['dts']['flags']['mri_perfect_reconst']  = (bool) $this->readBinData($fhBS,  1);
		$info['dts']['raw']['encoder_soft_version']   =        $this->readBinData($fhBS,  4);
		$info['dts']['raw']['copy_history']           =        $this->readBinData($fhBS,  2);
		$info['dts']['raw']['bits_per_sample']        =        $this->readBinData($fhBS,  2);
		$info['dts']['flags']['surround_es']          = (bool) $this->readBinData($fhBS,  1);
		$info['dts']['flags']['front_sum_diff']       = (bool) $this->readBinData($fhBS,  1);
		$info['dts']['flags']['surround_sum_diff']    = (bool) $this->readBinData($fhBS,  1);
		$info['dts']['raw']['dialog_normalization']   =        $this->readBinData($fhBS,  4);

$info['dts']['bitrate']              = self::bitrateLookup($info['dts']['raw']['bitrate']);
		$info['dts']['bits_per_sample']      = self::bitPerSampleLookup($info['dts']['raw']['bits_per_sample']);
		$info['dts']['sample_rate']          = self::sampleRateLookup($info['dts']['raw']['sample_frequency']);
		$info['dts']['dialog_normalization'] = self::dialogNormalization($info['dts']['raw']['dialog_normalization'], $info['dts']['raw']['encoder_soft_version']);
		$info['dts']['flags']['lossless']    = (($info['dts']['raw']['bitrate'] == 31) ? true  : false);
		$info['dts']['bitrate_mode']         = (($info['dts']['raw']['bitrate'] == 30) ? 'vbr' : 'cbr');
		$info['dts']['channels']             = self::numChannelsLookup($info['dts']['raw']['channel_arrangement']);
		$info['dts']['channel_arrangement']  = self::channelArrangementLookup($info['dts']['raw']['channel_arrangement']);

$info['audio']['dataformat']          = 'dts';
		$info['audio']['lossless']            = $info['dts']['flags']['lossless'];
		$info['audio']['bitrate_mode']        = $info['dts']['bitrate_mode'];
		$info['audio']['bits_per_sample']     = $info['dts']['bits_per_sample'];
		$info['audio']['sample_rate']         = $info['dts']['sample_rate'];
		$info['audio']['channels']            = $info['dts']['channels'];
		$info['audio']['bitrate']             = $info['dts']['bitrate'];
		if (isset($info['avdataend']) && !empty($info['dts']['bitrate']) && is_numeric($info['dts']['bitrate'])) {
			$info['playtime_seconds']         = ($info['avdataend'] - $info['avdataoffset']) / ($info['dts']['bitrate'] / 8);
			if (($encoding == 2) || ($encoding == 3)) {
				// 14-bit data packed into 16-bit words, so the playtime is wrong because only (14/16) of the bytes in the data portion of the file are used at the specified bitrate
				$info['playtime_seconds'] *= (14 / 16);
			}
		}
		return true;
	}

/**
	 * @param string $bin
	 * @param int $length
	 *
	 * @return int
	 */
	private function readBinData($bin, $length) {
		$data = substr($bin, $this->readBinDataOffset, $length);
		$this->readBinDataOffset += $length;

return bindec($data);
	}

/**
	 * @param int $index
	 *
	 * @return int|string|false
	 */
	public static function bitrateLookup($index) {
		static $lookup = array(
			0  => 32000,
			1  => 56000,
			2  => 64000,
			3  => 96000,
			4  => 112000,
			5  => 128000,
			6  => 192000,
			7  => 224000,
			8  => 256000,
			9  => 320000,
			10 => 384000,
			11 => 448000,
			12 => 512000,
			13 => 576000,
			14 => 640000,
			15 => 768000,
			16 => 960000,
			17 => 1024000,
			18 => 1152000,
			19 => 1280000,
			20 => 1344000,
			21 => 1408000,
			22 => 1411200,
			23 => 1472000,
			24 => 1536000,
			25 => 1920000,
			26 => 2048000,
			27 => 3072000,
			28 => 3840000,
			29 => 'open',
			30 => 'variable',
			31 => 'lossless',
		);
		return (isset($lookup[$index]) ? $lookup[$index] : false);
	}

/**
	 * @param int $index
	 *
	 * @return int|string|false
	 */
	public static function sampleRateLookup($index) {
		static $lookup = array(
			0  => 'invalid',
			1  => 8000,
			2  => 16000,
			3  => 32000,
			4  => 'invalid',
			5  => 'invalid',
			6  => 11025,
			7  => 22050,
			8  => 44100,
			9  => 'invalid',
			10 => 'invalid',
			11 => 12000,
			12 => 24000,
			13 => 48000,
			14 => 'invalid',
			15 => 'invalid',
		);
		return (isset($lookup[$index]) ? $lookup[$index] : false);
	}

/**
	 * @param int $index
	 *
	 * @return int|false
	 */
	public static function bitPerSampleLookup($index) {
		static $lookup = array(
			0  => 16,
			1  => 20,
			2  => 24,
			3  => 24,
		);
		return (isset($lookup[$index]) ? $lookup[$index] : false);
	}

/**
	 * @param int $index
	 *
	 * @return int|false
	 */
	public static function numChannelsLookup($index) {
		switch ($index) {
			case 0:
				return 1;
			case 1:
			case 2:
			case 3:
			case 4:
				return 2;
			case 5:
			case 6:
				return 3;
			case 7:
			case 8:
				return 4;
			case 9:
				return 5;
			case 10:
			case 11:
			case 12:
				return 6;
			case 13:
				return 7;
			case 14:
			case 15:
				return 8;
		}
		return false;
	}

/**
	 * @param int $index
	 *
	 * @return string
	 */
	public static function channelArrangementLookup($index) {
		static $lookup = array(
			0  => 'A',
			1  => 'A + B (dual mono)',
			2  => 'L + R (stereo)',
			3  => '(L+R) + (L-R) (sum-difference)',
			4  => 'LT + RT (left and right total)',
			5  => 'C + L + R',
			6  => 'L + R + S',
			7  => 'C + L + R + S',
			8  => 'L + R + SL + SR',
			9  => 'C + L + R + SL + SR',
			10 => 'CL + CR + L + R + SL + SR',
			11 => 'C + L + R+ LR + RR + OV',
			12 => 'CF + CR + LF + RF + LR + RR',
			13 => 'CL + C + CR + L + R + SL + SR',
			14 => 'CL + CR + L + R + SL1 + SL2 + SR1 + SR2',
			15 => 'CL + C+ CR + L + R + SL + S + SR',
		);
		return (isset($lookup[$index]) ? $lookup[$index] : 'user-defined');
	}

/**
	 * @param int $index
	 * @param int $version
	 *
	 * @return int|false
	 */
	public static function dialogNormalization($index, $version) {
		switch ($version) {
			case 7:
				return 0 - $index;
			case 6:
				return 0 - 16 - $index;
		}
		return false;
	}

/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org>               //
//  available at https://github.com/JamesHeinrich/getID3       //
//            or https://www.getid3.org                        //
//            or http://getid3.sourceforge.net                 //
//  see readme.txt for more details                            //
/////////////////////////////////////////////////////////////////
//                                                             //
// module.tag.id3v1.php                                        //
// module for analyzing ID3v1 tags                             //
// dependencies: NONE                                          //
//                                                            ///
/////////////////////////////////////////////////////////////////

if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
	exit;
}

class getid3_id3v1 extends getid3_handler
{
	/**
	 * @return bool
	 */
	public function Analyze() {
		$info = &$this->getid3->info;

if (!getid3_lib::intValueSupported($info['filesize'])) {
			$this->warning('Unable to check for ID3v1 because file is larger than '.round(PHP_INT_MAX / 1073741824).'GB');
			return false;
		}

if($info['filesize'] < 256) {
			$this->fseek(-128, SEEK_END);
			$preid3v1 = '';
			$id3v1tag = $this->fread(128);
		} else {
			$this->fseek(-256, SEEK_END);
			$preid3v1 = $this->fread(128);
			$id3v1tag = $this->fread(128);
		}

if (substr($id3v1tag, 0, 3) == 'TAG') {

$info['avdataend'] = $info['filesize'] - 128;

$ParsedID3v1            = array();
			$ParsedID3v1['title']   = $this->cutfield(substr($id3v1tag,   3, 30));
			$ParsedID3v1['artist']  = $this->cutfield(substr($id3v1tag,  33, 30));
			$ParsedID3v1['album']   = $this->cutfield(substr($id3v1tag,  63, 30));
			$ParsedID3v1['year']    = $this->cutfield(substr($id3v1tag,  93,  4));
			$ParsedID3v1['comment'] =                 substr($id3v1tag,  97, 30);  // can't remove nulls yet, track detection depends on them
			$ParsedID3v1['genreid'] =             ord(substr($id3v1tag, 127,  1));

// If second-last byte of comment field is null and last byte of comment field is non-null
			// then this is ID3v1.1 and the comment field is 28 bytes long and the 30th byte is the track number
			if (($id3v1tag[125] === "\x00") && ($id3v1tag[126] !== "\x00")) {
				$ParsedID3v1['track_number'] = ord(substr($ParsedID3v1['comment'], 29,  1));
				$ParsedID3v1['comment']      =     substr($ParsedID3v1['comment'],  0, 28);
			}
			$ParsedID3v1['comment'] = $this->cutfield($ParsedID3v1['comment']);

$ParsedID3v1['genre'] = $this->LookupGenreName($ParsedID3v1['genreid']);
			if (!empty($ParsedID3v1['genre'])) {
				unset($ParsedID3v1['genreid']);
			}
			if (empty($ParsedID3v1['genre']) || ($ParsedID3v1['genre'] == 'Unknown')) {
				unset($ParsedID3v1['genre']);
			}

foreach ($ParsedID3v1 as $key => $value) {
				$ParsedID3v1['comments'][$key][0] = $value;
			}
			$ID3v1encoding = $this->getid3->encoding_id3v1;
			if ($this->getid3->encoding_id3v1_autodetect) {
				// ID3v1 encoding detection hack START
				// ID3v1 is defined as always using ISO-8859-1 encoding, but it is not uncommon to find files tagged with ID3v1 using Windows-1251 or other character sets
				// Since ID3v1 has no concept of character sets there is no certain way to know we have the correct non-ISO-8859-1 character set, but we can guess
				foreach ($ParsedID3v1['comments'] as $tag_key => $valuearray) {
					foreach ($valuearray as $key => $value) {
						if (preg_match('#^[\\x00-\\x40\\x80-\\xFF]+$#', $value) && !ctype_digit((string) $value)) { // check for strings with only characters above chr(128) and punctuation/numbers, but not just numeric strings (e.g. track numbers or years)
							foreach (array('Windows-1251', 'KOI8-R') as $id3v1_bad_encoding) {
								if (function_exists('mb_convert_encoding') && @mb_convert_encoding($value, $id3v1_bad_encoding, $id3v1_bad_encoding) === $value) {
									$ID3v1encoding = $id3v1_bad_encoding;
									$this->warning('ID3v1 detected as '.$id3v1_bad_encoding.' text encoding in '.$tag_key);
									break 3;
								} elseif (function_exists('iconv') && @iconv($id3v1_bad_encoding, $id3v1_bad_encoding, $value) === $value) {
									$ID3v1encoding = $id3v1_bad_encoding;
									$this->warning('ID3v1 detected as '.$id3v1_bad_encoding.' text encoding in '.$tag_key);
									break 3;
								}
							}
						}
					}
				}
				// ID3v1 encoding detection hack END
			}

// ID3v1 data is supposed to be padded with NULL characters, but some taggers pad with spaces
			$GoodFormatID3v1tag = $this->GenerateID3v1Tag(
											$ParsedID3v1['title'],
											$ParsedID3v1['artist'],
											$ParsedID3v1['album'],
											$ParsedID3v1['year'],
											(isset($ParsedID3v1['genre']) ? $this->LookupGenreID($ParsedID3v1['genre']) : false),
											$ParsedID3v1['comment'],
											(!empty($ParsedID3v1['track_number']) ? $ParsedID3v1['track_number'] : ''));
			$ParsedID3v1['padding_valid'] = true;
			if ($id3v1tag !== $GoodFormatID3v1tag) {
				$ParsedID3v1['padding_valid'] = false;
				$this->warning('Some ID3v1 fields do not use NULL characters for padding');
			}

$ParsedID3v1['tag_offset_end']   = $info['filesize'];
			$ParsedID3v1['tag_offset_start'] = $ParsedID3v1['tag_offset_end'] - 128;

$info['id3v1'] = $ParsedID3v1;
			$info['id3v1']['encoding'] = $ID3v1encoding;
		}

if (substr($preid3v1, 0, 3) == 'TAG') {
			// The way iTunes handles tags is, well, brain-damaged.
			// It completely ignores v1 if ID3v2 is present.
			// This goes as far as adding a new v1 tag *even if there already is one*

// A suspected double-ID3v1 tag has been detected, but it could be that
			// the "TAG" identifier is a legitimate part of an APE or Lyrics3 tag
			if (substr($preid3v1, 96, 8) == 'APETAGEX') {
				// an APE tag footer was found before the last ID3v1, assume false "TAG" synch
			} elseif (substr($preid3v1, 119, 6) == 'LYRICS') {
				// a Lyrics3 tag footer was found before the last ID3v1, assume false "TAG" synch
			} else {
				// APE and Lyrics3 footers not found - assume double ID3v1
				$this->warning('Duplicate ID3v1 tag detected - this has been known to happen with iTunes');
				$info['avdataend'] -= 128;
			}
		}

return true;
	}

/**
	 * @param string $str
	 *
	 * @return string
	 */
	public static function cutfield($str) {
		return trim(substr($str, 0, strcspn($str, "\x00")));
	}

/**
	 * @param bool $allowSCMPXextended
	 *
	 * @return string[]
	 */
	public static function ArrayOfGenres($allowSCMPXextended=false) {
		static $GenreLookup = array(
			0    => 'Blues',
			1    => 'Classic Rock',
			2    => 'Country',
			3    => 'Dance',
			4    => 'Disco',
			5    => 'Funk',
			6    => 'Grunge',
			7    => 'Hip-Hop',
			8    => 'Jazz',
			9    => 'Metal',
			10   => 'New Age',
			11   => 'Oldies',
			12   => 'Other',
			13   => 'Pop',
			14   => 'R&B',
			15   => 'Rap',
			16   => 'Reggae',
			17   => 'Rock',
			18   => 'Techno',
			19   => 'Industrial',
			20   => 'Alternative',
			21   => 'Ska',
			22   => 'Death Metal',
			23   => 'Pranks',
			24   => 'Soundtrack',
			25   => 'Euro-Techno',
			26   => 'Ambient',
			27   => 'Trip-Hop',
			28   => 'Vocal',
			29   => 'Jazz+Funk',
			30   => 'Fusion',
			31   => 'Trance',
			32   => 'Classical',
			33   => 'Instrumental',
			34   => 'Acid',
			35   => 'House',
			36   => 'Game',
			37   => 'Sound Clip',
			38   => 'Gospel',
			39   => 'Noise',
			40   => 'Alt. Rock',
			41   => 'Bass',
			42   => 'Soul',
			43   => 'Punk',
			44   => 'Space',
			45   => 'Meditative',
			46   => 'Instrumental Pop',
			47   => 'Instrumental Rock',
			48   => 'Ethnic',
			49   => 'Gothic',
			50   => 'Darkwave',
			51   => 'Techno-Industrial',
			52   => 'Electronic',
			53   => 'Pop-Folk',
			54   => 'Eurodance',
			55   => 'Dream',
			56   => 'Southern Rock',
			57   => 'Comedy',
			58   => 'Cult',
			59   => 'Gangsta Rap',
			60   => 'Top 40',
			61   => 'Christian Rap',
			62   => 'Pop/Funk',
			63   => 'Jungle',
			64   => 'Native American',
			65   => 'Cabaret',
			66   => 'New Wave',
			67   => 'Psychedelic',
			68   => 'Rave',
			69   => 'Showtunes',
			70   => 'Trailer',
			71   => 'Lo-Fi',
			72   => 'Tribal',
			73   => 'Acid Punk',
			74   => 'Acid Jazz',
			75   => 'Polka',
			76   => 'Retro',
			77   => 'Musical',
			78   => 'Rock & Roll',
			79   => 'Hard Rock',
			80   => 'Folk',
			81   => 'Folk/Rock',
			82   => 'National Folk',
			83   => 'Swing',
			84   => 'Fast-Fusion',
			85   => 'Bebob',
			86   => 'Latin',
			87   => 'Revival',
			88   => 'Celtic',
			89   => 'Bluegrass',
			90   => 'Avantgarde',
			91   => 'Gothic Rock',
			92   => 'Progressive Rock',
			93   => 'Psychedelic Rock',
			94   => 'Symphonic Rock',
			95   => 'Slow Rock',
			96   => 'Big Band',
			97   => 'Chorus',
			98   => 'Easy Listening',
			99   => 'Acoustic',
			100  => 'Humour',
			101  => 'Speech',
			102  => 'Chanson',
			103  => 'Opera',
			104  => 'Chamber Music',
			105  => 'Sonata',
			106  => 'Symphony',
			107  => 'Booty Bass',
			108  => 'Primus',
			109  => 'Porn Groove',
			110  => 'Satire',
			111  => 'Slow Jam',
			112  => 'Club',
			113  => 'Tango',
			114  => 'Samba',
			115  => 'Folklore',
			116  => 'Ballad',
			117  => 'Power Ballad',
			118  => 'Rhythmic Soul',
			119  => 'Freestyle',
			120  => 'Duet',
			121  => 'Punk Rock',
			122  => 'Drum Solo',
			123  => 'A Cappella',
			124  => 'Euro-House',
			125  => 'Dance Hall',
			126  => 'Goa',
			127  => 'Drum & Bass',
			128  => 'Club-House',
			129  => 'Hardcore',
			130  => 'Terror',
			131  => 'Indie',
			132  => 'BritPop',
			133  => 'Negerpunk',
			134  => 'Polsk Punk',
			135  => 'Beat',
			136  => 'Christian Gangsta Rap',
			137  => 'Heavy Metal',
			138  => 'Black Metal',
			139  => 'Crossover',
			140  => 'Contemporary Christian',
			141  => 'Christian Rock',
			142  => 'Merengue',
			143  => 'Salsa',
			144  => 'Thrash Metal',
			145  => 'Anime',
			146  => 'JPop',
			147  => 'Synthpop',
			148 => 'Abstract',
			149 => 'Art Rock',
			150 => 'Baroque',
			151 => 'Bhangra',
			152 => 'Big Beat',
			153 => 'Breakbeat',
			154 => 'Chillout',
			155 => 'Downtempo',
			156 => 'Dub',
			157 => 'EBM',
			158 => 'Eclectic',
			159 => 'Electro',
			160 => 'Electroclash',
			161 => 'Emo',
			162 => 'Experimental',
			163 => 'Garage',
			164 => 'Global',
			165 => 'IDM',
			166 => 'Illbient',
			167 => 'Industro-Goth',
			168 => 'Jam Band',
			169 => 'Krautrock',
			170 => 'Leftfield',
			171 => 'Lounge',
			172 => 'Math Rock',
			173 => 'New Romantic',
			174 => 'Nu-Breakz',
			175 => 'Post-Punk',
			176 => 'Post-Rock',
			177 => 'Psytrance',
			178 => 'Shoegaze',
			179 => 'Space Rock',
			180 => 'Trop Rock',
			181 => 'World Music',
			182 => 'Neoclassical',
			183 => 'Audiobook',
			184 => 'Audio Theatre',
			185 => 'Neue Deutsche Welle',
			186 => 'Podcast',
			187 => 'Indie-Rock',
			188 => 'G-Funk',
			189 => 'Dubstep',
			190 => 'Garage Rock',
			191 => 'Psybient',

255  => 'Unknown',

'CR' => 'Cover',
			'RX' => 'Remix'
		);

static $GenreLookupSCMPX = array();
		if ($allowSCMPXextended && empty($GenreLookupSCMPX)) {
			$GenreLookupSCMPX = $GenreLookup;
			// http://www.geocities.co.jp/SiliconValley-Oakland/3664/alittle.html#GenreExtended
			// Extended ID3v1 genres invented by SCMPX
			// Note that 255 "Japanese Anime" conflicts with standard "Unknown"
			$GenreLookupSCMPX[240] = 'Sacred';
			$GenreLookupSCMPX[241] = 'Northern Europe';
			$GenreLookupSCMPX[242] = 'Irish & Scottish';
			$GenreLookupSCMPX[243] = 'Scotland';
			$GenreLookupSCMPX[244] = 'Ethnic Europe';
			$GenreLookupSCMPX[245] = 'Enka';
			$GenreLookupSCMPX[246] = 'Children\'s Song';
			$GenreLookupSCMPX[247] = 'Japanese Sky';
			$GenreLookupSCMPX[248] = 'Japanese Heavy Rock';
			$GenreLookupSCMPX[249] = 'Japanese Doom Rock';
			$GenreLookupSCMPX[250] = 'Japanese J-POP';
			$GenreLookupSCMPX[251] = 'Japanese Seiyu';
			$GenreLookupSCMPX[252] = 'Japanese Ambient Techno';
			$GenreLookupSCMPX[253] = 'Japanese Moemoe';
			$GenreLookupSCMPX[254] = 'Japanese Tokusatsu';
			//$GenreLookupSCMPX[255] = 'Japanese Anime';
		}

return ($allowSCMPXextended ? $GenreLookupSCMPX : $GenreLookup);
	}

/**
	 * @param string $genreid
	 * @param bool   $allowSCMPXextended
	 *
	 * @return string|false
	 */
	public static function LookupGenreName($genreid, $allowSCMPXextended=true) {
		switch ($genreid) {
			case 'RX':
			case 'CR':
				break;
			default:
				if (!is_numeric($genreid)) {
					return false;
				}
				$genreid = intval($genreid); // to handle 3 or '3' or '03'
				break;
		}
		$GenreLookup = self::ArrayOfGenres($allowSCMPXextended);
		return (isset($GenreLookup[$genreid]) ? $GenreLookup[$genreid] : false);
	}

/**
	 * @param string $genre
	 * @param bool   $allowSCMPXextended
	 *
	 * @return string|false
	 */
	public static function LookupGenreID($genre, $allowSCMPXextended=false) {
		$GenreLookup = self::ArrayOfGenres($allowSCMPXextended);
		$LowerCaseNoSpaceSearchTerm = strtolower(str_replace(' ', '', $genre));
		foreach ($GenreLookup as $key => $value) {
			if (strtolower(str_replace(' ', '', $value)) == $LowerCaseNoSpaceSearchTerm) {
				return $key;
			}
		}
		return false;
	}

/**
	 * @param string $OriginalGenre
	 *
	 * @return string|false
	 */
	public static function StandardiseID3v1GenreName($OriginalGenre) {
		if (($GenreID = self::LookupGenreID($OriginalGenre)) !== false) {
			return self::LookupGenreName($GenreID);
		}
		return $OriginalGenre;
	}

/**
	 * @param string     $title
	 * @param string     $artist
	 * @param string     $album
	 * @param string     $year
	 * @param int        $genreid
	 * @param string     $comment
	 * @param int|string $track
	 *
	 * @return string
	 */
	public static function GenerateID3v1Tag($title, $artist, $album, $year, $genreid, $comment, $track='') {
		$ID3v1Tag  = 'TAG';
		$ID3v1Tag .= str_pad(trim(substr($title,  0, 30)), 30, "\x00", STR_PAD_RIGHT);
		$ID3v1Tag .= str_pad(trim(substr($artist, 0, 30)), 30, "\x00", STR_PAD_RIGHT);
		$ID3v1Tag .= str_pad(trim(substr($album,  0, 30)), 30, "\x00", STR_PAD_RIGHT);
		$ID3v1Tag .= str_pad(trim(substr($year,   0,  4)),  4, "\x00", STR_PAD_LEFT);
		if (!empty($track) && ($track > 0) && ($track <= 255)) {
			$ID3v1Tag .= str_pad(trim(substr($comment, 0, 28)), 28, "\x00", STR_PAD_RIGHT);
			$ID3v1Tag .= "\x00";
			if (gettype($track) == 'string') {
				$track = (int) $track;
			}
			$ID3v1Tag .= chr($track);
		} else {
			$ID3v1Tag .= str_pad(trim(substr($comment, 0, 30)), 30, "\x00", STR_PAD_RIGHT);
		}
		if (($genreid < 0) || ($genreid > 147)) {
			$genreid = 255; // 'unknown' genre
		}
		switch (gettype($genreid)) {
			case 'string':
			case 'integer':
				$ID3v1Tag .= chr(intval($genreid));
				break;
			default:
				$ID3v1Tag .= chr(255); // 'unknown' genre
				break;
		}

return $ID3v1Tag;
	}

/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org>               //
//  available at https://github.com/JamesHeinrich/getID3       //
//            or https://www.getid3.org                        //
//            or http://getid3.sourceforge.net                 //
//  see readme.txt for more details                            //
/////////////////////////////////////////////////////////////////
//                                                             //
// module.audio.flac.php                                       //
// module for analyzing FLAC and OggFLAC audio files           //
// dependencies: module.audio.ogg.php                          //
//                                                            ///
/////////////////////////////////////////////////////////////////

/**
* @tutorial http://flac.sourceforge.net/format.html
*/
class getid3_flac extends getid3_handler
{
	const syncword = 'fLaC';

/**
	 * @return bool
	 */
	public function Analyze() {
		$info = &$this->getid3->info;

$this->fseek($info['avdataoffset']);
		$StreamMarker = $this->fread(4);
		if ($StreamMarker != self::syncword) {
			return $this->error('Expecting "'.getid3_lib::PrintHexBytes(self::syncword).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($StreamMarker).'"');
		}
		$info['fileformat']            = 'flac';
		$info['audio']['dataformat']   = 'flac';
		$info['audio']['bitrate_mode'] = 'vbr';
		$info['audio']['lossless']     = true;

// parse flac container
		return $this->parseMETAdata();
	}

/**
	 * @return bool
	 */
	public function parseMETAdata() {
		$info = &$this->getid3->info;
		do {
			$BlockOffset   = $this->ftell();
			$BlockHeader   = $this->fread(4);
			$LBFBT         = getid3_lib::BigEndian2Int(substr($BlockHeader, 0, 1));  // LBFBT = LastBlockFlag + BlockType
			$LastBlockFlag = (bool) ($LBFBT & 0x80);
			$BlockType     =        ($LBFBT & 0x7F);
			$BlockLength   = getid3_lib::BigEndian2Int(substr($BlockHeader, 1, 3));
			$BlockTypeText = self::metaBlockTypeLookup($BlockType);

if (($BlockOffset + 4 + $BlockLength) > $info['avdataend']) {
				$this->warning('METADATA_BLOCK_HEADER.BLOCK_TYPE ('.$BlockTypeText.') at offset '.$BlockOffset.' extends beyond end of file');
				break;
			}
			if ($BlockLength < 1) {
				if ($BlockTypeText != 'reserved') {
					// probably supposed to be zero-length
					$this->warning('METADATA_BLOCK_HEADER.BLOCK_LENGTH ('.$BlockTypeText.') at offset '.$BlockOffset.' is zero bytes');
					continue;
				}
				$this->error('METADATA_BLOCK_HEADER.BLOCK_LENGTH ('.$BlockLength.') at offset '.$BlockOffset.' is invalid');
				break;
			}

$info['flac'][$BlockTypeText]['raw'] = array();
			$BlockTypeText_raw = &$info['flac'][$BlockTypeText]['raw'];

$BlockTypeText_raw['offset']          = $BlockOffset;
			$BlockTypeText_raw['last_meta_block'] = $LastBlockFlag;
			$BlockTypeText_raw['block_type']      = $BlockType;
			$BlockTypeText_raw['block_type_text'] = $BlockTypeText;
			$BlockTypeText_raw['block_length']    = $BlockLength;
			if ($BlockTypeText_raw['block_type'] != 0x06) { // do not read attachment data automatically
				$BlockTypeText_raw['block_data']  = $this->fread($BlockLength);
			}

switch ($BlockTypeText) {
				case 'STREAMINFO':     // 0x00
					if (!$this->parseSTREAMINFO($BlockTypeText_raw['block_data'])) {
						return false;
					}
					break;

case 'PADDING':        // 0x01
					unset($info['flac']['PADDING']); // ignore
					break;

case 'APPLICATION':    // 0x02
					if (!$this->parseAPPLICATION($BlockTypeText_raw['block_data'])) {
						return false;
					}
					break;

case 'SEEKTABLE':      // 0x03
					if (!$this->parseSEEKTABLE($BlockTypeText_raw['block_data'])) {
						return false;
					}
					break;

case 'VORBIS_COMMENT': // 0x04
					if (!$this->parseVORBIS_COMMENT($BlockTypeText_raw['block_data'])) {
						return false;
					}
					break;

case 'CUESHEET':       // 0x05
					if (!$this->parseCUESHEET($BlockTypeText_raw['block_data'])) {
						return false;
					}
					break;

case 'PICTURE':        // 0x06
					if (!$this->parsePICTURE()) {
						return false;
					}
					break;

default:
					$this->warning('Unhandled METADATA_BLOCK_HEADER.BLOCK_TYPE ('.$BlockType.') at offset '.$BlockOffset);
			}

unset($info['flac'][$BlockTypeText]['raw']);
			$info['avdataoffset'] = $this->ftell();
		}
		while ($LastBlockFlag === false);

// handle tags
		if (!empty($info['flac']['VORBIS_COMMENT']['comments'])) {
			$info['flac']['comments'] = $info['flac']['VORBIS_COMMENT']['comments'];
		}
		if (!empty($info['flac']['VORBIS_COMMENT']['vendor'])) {
			$info['audio']['encoder'] = str_replace('reference ', '', $info['flac']['VORBIS_COMMENT']['vendor']);
		}

// copy attachments to 'comments' array if nesesary
		if (isset($info['flac']['PICTURE']) && ($this->getid3->option_save_attachments !== getID3::ATTACHMENTS_NONE)) {
			foreach ($info['flac']['PICTURE'] as $entry) {
				if (!empty($entry['data'])) {
					if (!isset($info['flac']['comments']['picture'])) {
						$info['flac']['comments']['picture'] = array();
					}
					$comments_picture_data = array();
					foreach (array('data', 'image_mime', 'image_width', 'image_height', 'imagetype', 'picturetype', 'description', 'datalength') as $picture_key) {
						if (isset($entry[$picture_key])) {
							$comments_picture_data[$picture_key] = $entry[$picture_key];
						}
					}
					$info['flac']['comments']['picture'][] = $comments_picture_data;
					unset($comments_picture_data);
				}
			}
		}

if (isset($info['flac']['STREAMINFO'])) {
			if (!$this->isDependencyFor('matroska')) {
				$info['flac']['compressed_audio_bytes'] = $info['avdataend'] - $info['avdataoffset'];
			}
			$info['flac']['uncompressed_audio_bytes'] = $info['flac']['STREAMINFO']['samples_stream'] * $info['flac']['STREAMINFO']['channels'] * ($info['flac']['STREAMINFO']['bits_per_sample'] / 8);
			if ($info['flac']['uncompressed_audio_bytes'] == 0) {
				return $this->error('Corrupt FLAC file: uncompressed_audio_bytes == zero');
			}
			if (!empty($info['flac']['compressed_audio_bytes'])) {
				$info['flac']['compression_ratio'] = $info['flac']['compressed_audio_bytes'] / $info['flac']['uncompressed_audio_bytes'];
			}
		}

// set md5_data_source - built into flac 0.5+
		if (isset($info['flac']['STREAMINFO']['audio_signature'])) {

if ($info['flac']['STREAMINFO']['audio_signature'] === str_repeat("\x00", 16)) {
				$this->warning('FLAC STREAMINFO.audio_signature is null (known issue with libOggFLAC)');
			}
			else {
				$info['md5_data_source'] = '';
				$md5 = $info['flac']['STREAMINFO']['audio_signature'];
				for ($i = 0; $i < strlen($md5); $i++) {
					$info['md5_data_source'] .= str_pad(dechex(ord($md5[$i])), 2, '00', STR_PAD_LEFT);
				}
				if (!preg_match('/^[0-9a-f]{32}$/', $info['md5_data_source'])) {
					unset($info['md5_data_source']);
				}
			}
		}

if (isset($info['flac']['STREAMINFO']['bits_per_sample'])) {
			$info['audio']['bits_per_sample'] = $info['flac']['STREAMINFO']['bits_per_sample'];
			if ($info['audio']['bits_per_sample'] == 8) {
				// special case
				// must invert sign bit on all data bytes before MD5'ing to match FLAC's calculated value
				// MD5sum calculates on unsigned bytes, but FLAC calculated MD5 on 8-bit audio data as signed
				$this->warning('FLAC calculates MD5 data strangely on 8-bit audio, so the stored md5_data_source value will not match the decoded WAV file');
			}
		}

return true;
	}

/**
	 * @param string $BlockData
	 *
	 * @return array
	 */
	public static function parseSTREAMINFOdata($BlockData) {
		$streaminfo = array();
		$streaminfo['min_block_size']  = getid3_lib::BigEndian2Int(substr($BlockData, 0, 2));
		$streaminfo['max_block_size']  = getid3_lib::BigEndian2Int(substr($BlockData, 2, 2));
		$streaminfo['min_frame_size']  = getid3_lib::BigEndian2Int(substr($BlockData, 4, 3));
		$streaminfo['max_frame_size']  = getid3_lib::BigEndian2Int(substr($BlockData, 7, 3));

$SRCSBSS                       = getid3_lib::BigEndian2Bin(substr($BlockData, 10, 8));
		$streaminfo['sample_rate']     = getid3_lib::Bin2Dec(substr($SRCSBSS,  0, 20));
		$streaminfo['channels']        = getid3_lib::Bin2Dec(substr($SRCSBSS, 20,  3)) + 1;
		$streaminfo['bits_per_sample'] = getid3_lib::Bin2Dec(substr($SRCSBSS, 23,  5)) + 1;
		$streaminfo['samples_stream']  = getid3_lib::Bin2Dec(substr($SRCSBSS, 28, 36));

$streaminfo['audio_signature'] =                           substr($BlockData, 18, 16);

return $streaminfo;
	}

/**
	 * @param string $BlockData
	 *
	 * @return bool
	 */
	private function parseSTREAMINFO($BlockData) {
		$info = &$this->getid3->info;

$info['flac']['STREAMINFO'] = self::parseSTREAMINFOdata($BlockData);

if (!empty($info['flac']['STREAMINFO']['sample_rate'])) {

$info['audio']['bitrate_mode']    = 'vbr';
			$info['audio']['sample_rate']     = $info['flac']['STREAMINFO']['sample_rate'];
			$info['audio']['channels']        = $info['flac']['STREAMINFO']['channels'];
			$info['audio']['bits_per_sample'] = $info['flac']['STREAMINFO']['bits_per_sample'];
			$info['playtime_seconds']         = $info['flac']['STREAMINFO']['samples_stream'] / $info['flac']['STREAMINFO']['sample_rate'];
			if ($info['playtime_seconds'] > 0) {
				if (!$this->isDependencyFor('matroska')) {
					$info['audio']['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['playtime_seconds'];
				}
				else {
					$this->warning('Cannot determine audio bitrate because total stream size is unknown');
				}
			}

} else {
			return $this->error('Corrupt METAdata block: STREAMINFO');
		}

return true;
	}

/**
	 * @param string $BlockData
	 *
	 * @return bool
	 */
	private function parseAPPLICATION($BlockData) {
		$info = &$this->getid3->info;

$ApplicationID = getid3_lib::BigEndian2Int(substr($BlockData, 0, 4));
		$info['flac']['APPLICATION'][$ApplicationID]['name'] = self::applicationIDLookup($ApplicationID);
		$info['flac']['APPLICATION'][$ApplicationID]['data'] = substr($BlockData, 4);

return true;
	}

/**
	 * @param string $BlockData
	 *
	 * @return bool
	 */
	private function parseSEEKTABLE($BlockData) {
		$info = &$this->getid3->info;

$offset = 0;
		$BlockLength = strlen($BlockData);
		$placeholderpattern = str_repeat("\xFF", 8);
		while ($offset < $BlockLength) {
			$SampleNumberString = substr($BlockData, $offset, 8);
			$offset += 8;
			if ($SampleNumberString == $placeholderpattern) {

// placeholder point
				getid3_lib::safe_inc($info['flac']['SEEKTABLE']['placeholders'], 1);
				$offset += 10;

} else {

$SampleNumber                                        = getid3_lib::BigEndian2Int($SampleNumberString);
				$info['flac']['SEEKTABLE'][$SampleNumber]['offset']  = getid3_lib::BigEndian2Int(substr($BlockData, $offset, 8));
				$offset += 8;
				$info['flac']['SEEKTABLE'][$SampleNumber]['samples'] = getid3_lib::BigEndian2Int(substr($BlockData, $offset, 2));
				$offset += 2;

}
		}

return true;
	}

/**
	 * @param string $BlockData
	 *
	 * @return bool
	 */
	private function parseVORBIS_COMMENT($BlockData) {
		$info = &$this->getid3->info;

$getid3_ogg = new getid3_ogg($this->getid3);
		if ($this->isDependencyFor('matroska')) {
			$getid3_ogg->setStringMode($this->data_string);
		}
		$getid3_ogg->ParseVorbisComments();
		if (isset($info['ogg'])) {
			unset($info['ogg']['comments_raw']);
			$info['flac']['VORBIS_COMMENT'] = $info['ogg'];
			unset($info['ogg']);
		}

unset($getid3_ogg);

return true;
	}

/**
	 * @param string $BlockData
	 *
	 * @return bool
	 */
	private function parseCUESHEET($BlockData) {
		$info = &$this->getid3->info;
		$offset = 0;
		$info['flac']['CUESHEET']['media_catalog_number'] =                              trim(substr($BlockData, $offset, 128), "\0");
		$offset += 128;
		$info['flac']['CUESHEET']['lead_in_samples']      =         getid3_lib::BigEndian2Int(substr($BlockData, $offset, 8));
		$offset += 8;
		$info['flac']['CUESHEET']['flags']['is_cd']       = (bool) (getid3_lib::BigEndian2Int(substr($BlockData, $offset, 1)) & 0x80);
		$offset += 1;

$offset += 258; // reserved

$info['flac']['CUESHEET']['number_tracks']        =         getid3_lib::BigEndian2Int(substr($BlockData, $offset, 1));
		$offset += 1;

for ($track = 0; $track < $info['flac']['CUESHEET']['number_tracks']; $track++) {
			$TrackSampleOffset = getid3_lib::BigEndian2Int(substr($BlockData, $offset, 8));
			$offset += 8;
			$TrackNumber       = getid3_lib::BigEndian2Int(substr($BlockData, $offset, 1));
			$offset += 1;

$info['flac']['CUESHEET']['tracks'][$TrackNumber]['sample_offset']         = $TrackSampleOffset;

$info['flac']['CUESHEET']['tracks'][$TrackNumber]['isrc']                  =                           substr($BlockData, $offset, 12);
			$offset += 12;

$TrackFlagsRaw                                                             = getid3_lib::BigEndian2Int(substr($BlockData, $offset, 1));
			$offset += 1;
			$info['flac']['CUESHEET']['tracks'][$TrackNumber]['flags']['is_audio']     = (bool) ($TrackFlagsRaw & 0x80);
			$info['flac']['CUESHEET']['tracks'][$TrackNumber]['flags']['pre_emphasis'] = (bool) ($TrackFlagsRaw & 0x40);

$offset += 13; // reserved

$info['flac']['CUESHEET']['tracks'][$TrackNumber]['index_points']          = getid3_lib::BigEndian2Int(substr($BlockData, $offset, 1));
			$offset += 1;

for ($index = 0; $index < $info['flac']['CUESHEET']['tracks'][$TrackNumber]['index_points']; $index++) {
				$IndexSampleOffset = getid3_lib::BigEndian2Int(substr($BlockData, $offset, 8));
				$offset += 8;
				$IndexNumber       = getid3_lib::BigEndian2Int(substr($BlockData, $offset, 1));
				$offset += 1;

$offset += 3; // reserved

$info['flac']['CUESHEET']['tracks'][$TrackNumber]['indexes'][$IndexNumber] = $IndexSampleOffset;
			}
		}

return true;
	}

/**
	 * Parse METADATA_BLOCK_PICTURE flac structure and extract attachment
	 * External usage: audio.ogg
	 *
	 * @return bool
	 */
	public function parsePICTURE() {
		$info = &$this->getid3->info;

$picture = array();
		$picture['typeid']         = getid3_lib::BigEndian2Int($this->fread(4));
		$picture['picturetype']    = self::pictureTypeLookup($picture['typeid']);
		$picture['image_mime']     = $this->fread(getid3_lib::BigEndian2Int($this->fread(4)));
		$descr_length              = getid3_lib::BigEndian2Int($this->fread(4));
		if ($descr_length) {
			$picture['description'] = $this->fread($descr_length);
		}
		$picture['image_width']    = getid3_lib::BigEndian2Int($this->fread(4));
		$picture['image_height']   = getid3_lib::BigEndian2Int($this->fread(4));
		$picture['color_depth']    = getid3_lib::BigEndian2Int($this->fread(4));
		$picture['colors_indexed'] = getid3_lib::BigEndian2Int($this->fread(4));
		$picture['datalength']     = getid3_lib::BigEndian2Int($this->fread(4));

if ($picture['image_mime'] == '-->') {
			$picture['data'] = $this->fread($picture['datalength']);
		} else {
			$picture['data'] = $this->saveAttachment(
				str_replace('/', '_', $picture['picturetype']).'_'.$this->ftell(),
				$this->ftell(),
				$picture['datalength'],
				$picture['image_mime']);
		}

$info['flac']['PICTURE'][] = $picture;

return true;
	}

/**
	 * @param int $blocktype
	 *
	 * @return string
	 */
	public static function metaBlockTypeLookup($blocktype) {
		static $lookup = array(
			0 => 'STREAMINFO',
			1 => 'PADDING',
			2 => 'APPLICATION',
			3 => 'SEEKTABLE',
			4 => 'VORBIS_COMMENT',
			5 => 'CUESHEET',
			6 => 'PICTURE',
		);
		return (isset($lookup[$blocktype]) ? $lookup[$blocktype] : 'reserved');
	}

/**
	 * @param int $applicationid
	 *
	 * @return string
	 */
	public static function applicationIDLookup($applicationid) {
		// http://flac.sourceforge.net/id.html
		static $lookup = array(
			0x41544348 => 'FlacFile',                                                                           // "ATCH"
			0x42534F4C => 'beSolo',                                                                             // "BSOL"
			0x42554753 => 'Bugs Player',                                                                        // "BUGS"
			0x43756573 => 'GoldWave cue points (specification)',                                                // "Cues"
			0x46696361 => 'CUE Splitter',                                                                       // "Fica"
			0x46746F6C => 'flac-tools',                                                                         // "Ftol"
			0x4D4F5442 => 'MOTB MetaCzar',                                                                      // "MOTB"
			0x4D505345 => 'MP3 Stream Editor',                                                                  // "MPSE"
			0x4D754D4C => 'MusicML: Music Metadata Language',                                                   // "MuML"
			0x52494646 => 'Sound Devices RIFF chunk storage',                                                   // "RIFF"
			0x5346464C => 'Sound Font FLAC',                                                                    // "SFFL"
			0x534F4E59 => 'Sony Creative Software',                                                             // "SONY"
			0x5351455A => 'flacsqueeze',                                                                        // "SQEZ"
			0x54745776 => 'TwistedWave',                                                                        // "TtWv"
			0x55495453 => 'UITS Embedding tools',                                                               // "UITS"
			0x61696666 => 'FLAC AIFF chunk storage',                                                            // "aiff"
			0x696D6167 => 'flac-image application for storing arbitrary files in APPLICATION metadata blocks',  // "imag"
			0x7065656D => 'Parseable Embedded Extensible Metadata (specification)',                             // "peem"
			0x71667374 => 'QFLAC Studio',                                                                       // "qfst"
			0x72696666 => 'FLAC RIFF chunk storage',                                                            // "riff"
			0x74756E65 => 'TagTuner',                                                                           // "tune"
			0x78626174 => 'XBAT',                                                                               // "xbat"
			0x786D6364 => 'xmcd',                                                                               // "xmcd"
		);
		return (isset($lookup[$applicationid]) ? $lookup[$applicationid] : 'reserved');
	}

/**
	 * @param int $type_id
	 *
	 * @return string
	 */
	public static function pictureTypeLookup($type_id) {
		static $lookup = array (
			 0 => 'Other',
			 1 => '32x32 pixels \'file icon\' (PNG only)',
			 2 => 'Other file icon',
			 3 => 'Cover (front)',
			 4 => 'Cover (back)',
			 5 => 'Leaflet page',
			 6 => 'Media (e.g. label side of CD)',
			 7 => 'Lead artist/lead performer/soloist',
			 8 => 'Artist/performer',
			 9 => 'Conductor',
			10 => 'Band/Orchestra',
			11 => 'Composer',
			12 => 'Lyricist/text writer',
			13 => 'Recording Location',
			14 => 'During recording',
			15 => 'During performance',
			16 => 'Movie/video screen capture',
			17 => 'A bright coloured fish',
			18 => 'Illustration',
			19 => 'Band/artist logotype',
			20 => 'Publisher/Studio logotype',
		);
		return (isset($lookup[$type_id]) ? $lookup[$type_id] : 'reserved');
	}

/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org>               //
//  available at https://github.com/JamesHeinrich/getID3       //
//            or https://www.getid3.org                        //
//            or http://getid3.sourceforge.net                 //
//  see readme.txt for more details                            //
/////////////////////////////////////////////////////////////////
//                                                             //
// module.audio.mp3.php                                        //
// module for analyzing MP3 files                              //
// dependencies: NONE                                          //
//                                                            ///
/////////////////////////////////////////////////////////////////

if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
	exit;
}

class getid3_mp3 extends getid3_handler
{
	/**
	 * Forces getID3() to scan the file byte-by-byte and log all the valid audio frame headers - extremely slow,
	 * unrecommended, but may provide data from otherwise-unusable files.
	 *
	 * @var bool
	 */
	public $allow_bruteforce = false;

/**
	 * number of frames to scan to determine if MPEG-audio sequence is valid
	 * Lower this number to 5-20 for faster scanning
	 * Increase this number to 50+ for most accurate detection of valid VBR/CBR mpeg-audio streams
	 *
	 * @var int
	 */
	public $mp3_valid_check_frames = 50;

/**
	 * @return bool
	 */
	public function Analyze() {
		$info = &$this->getid3->info;

$initialOffset = $info['avdataoffset'];

if (!$this->getOnlyMPEGaudioInfo($info['avdataoffset'])) {
			if ($this->allow_bruteforce) {
				$this->error('Rescanning file in BruteForce mode');
				$this->getOnlyMPEGaudioInfoBruteForce();
			}
		}

if (isset($info['mpeg']['audio']['bitrate_mode'])) {
			$info['audio']['bitrate_mode'] = strtolower($info['mpeg']['audio']['bitrate_mode']);
		}

$CurrentDataLAMEversionString = null;
		if (((isset($info['id3v2']['headerlength']) && ($info['avdataoffset'] > $info['id3v2']['headerlength'])) || (!isset($info['id3v2']) && ($info['avdataoffset'] > 0) && ($info['avdataoffset'] != $initialOffset)))) {

$synchoffsetwarning = 'Unknown data before synch ';
			if (isset($info['id3v2']['headerlength'])) {
				$synchoffsetwarning .= '(ID3v2 header ends at '.$info['id3v2']['headerlength'].', then '.($info['avdataoffset'] - $info['id3v2']['headerlength']).' bytes garbage, ';
			} elseif ($initialOffset > 0) {
				$synchoffsetwarning .= '(should be at '.$initialOffset.', ';
			} else {
				$synchoffsetwarning .= '(should be at beginning of file, ';
			}
			$synchoffsetwarning .= 'synch detected at '.$info['avdataoffset'].')';
			if (isset($info['audio']['bitrate_mode']) && ($info['audio']['bitrate_mode'] == 'cbr')) {

if (!empty($info['id3v2']['headerlength']) && (($info['avdataoffset'] - $info['id3v2']['headerlength']) == $info['mpeg']['audio']['framelength'])) {

$synchoffsetwarning .= '. This is a known problem with some versions of LAME (3.90-3.92) DLL in CBR mode.';
					$info['audio']['codec'] = 'LAME';
					$CurrentDataLAMEversionString = 'LAME3.';

} elseif (empty($info['id3v2']['headerlength']) && ($info['avdataoffset'] == $info['mpeg']['audio']['framelength'])) {

$synchoffsetwarning .= '. This is a known problem with some versions of LAME (3.90 - 3.92) DLL in CBR mode.';
					$info['audio']['codec'] = 'LAME';
					$CurrentDataLAMEversionString = 'LAME3.';

}

}
			$this->warning($synchoffsetwarning);

}

if (isset($info['mpeg']['audio']['LAME'])) {
			$info['audio']['codec'] = 'LAME';
			if (!empty($info['mpeg']['audio']['LAME']['long_version'])) {
				$info['audio']['encoder'] = rtrim($info['mpeg']['audio']['LAME']['long_version'], "\x00");
			} elseif (!empty($info['mpeg']['audio']['LAME']['short_version'])) {
				$info['audio']['encoder'] = rtrim($info['mpeg']['audio']['LAME']['short_version'], "\x00");
			}
		}

$CurrentDataLAMEversionString = (!empty($CurrentDataLAMEversionString) ? $CurrentDataLAMEversionString : (isset($info['audio']['encoder']) ? $info['audio']['encoder'] : ''));
		if (!empty($CurrentDataLAMEversionString) && (substr($CurrentDataLAMEversionString, 0, 6) == 'LAME3.') && !preg_match('[0-9\)]', substr($CurrentDataLAMEversionString, -1))) {
			// a version number of LAME that does not end with a number like "LAME3.92"
			// or with a closing parenthesis like "LAME3.88 (alpha)"
			// or a version of LAME with the LAMEtag-not-filled-in-DLL-mode bug (3.90-3.92)

// not sure what the actual last frame length will be, but will be less than or equal to 1441
			$PossiblyLongerLAMEversion_FrameLength = 1441;

// Not sure what version of LAME this is - look in padding of last frame for longer version string
			$PossibleLAMEversionStringOffset = $info['avdataend'] - $PossiblyLongerLAMEversion_FrameLength;
			$this->fseek($PossibleLAMEversionStringOffset);
			$PossiblyLongerLAMEversion_Data = $this->fread($PossiblyLongerLAMEversion_FrameLength);
			switch (substr($CurrentDataLAMEversionString, -1)) {
				case 'a':
				case 'b':
					// "LAME3.94a" will have a longer version string of "LAME3.94 (alpha)" for example
					// need to trim off "a" to match longer string
					$CurrentDataLAMEversionString = substr($CurrentDataLAMEversionString, 0, -1);
					break;
			}
			if (($PossiblyLongerLAMEversion_String = strstr($PossiblyLongerLAMEversion_Data, $CurrentDataLAMEversionString)) !== false) {
				if (substr($PossiblyLongerLAMEversion_String, 0, strlen($CurrentDataLAMEversionString)) == $CurrentDataLAMEversionString) {
					$PossiblyLongerLAMEversion_NewString = substr($PossiblyLongerLAMEversion_String, 0, strspn($PossiblyLongerLAMEversion_String, 'LAME0123456789., (abcdefghijklmnopqrstuvwxyzJFSOND)')); //"LAME3.90.3"  "LAME3.87 (beta 1, Sep 27 2000)" "LAME3.88 (beta)"
					if (empty($info['audio']['encoder']) || (strlen($PossiblyLongerLAMEversion_NewString) > strlen($info['audio']['encoder']))) {
						if (!empty($info['audio']['encoder']) && !empty($info['mpeg']['audio']['LAME']['short_version']) && ($info['audio']['encoder'] == $info['mpeg']['audio']['LAME']['short_version'])) {
							if (preg_match('#^LAME[0-9\\.]+#', $PossiblyLongerLAMEversion_NewString, $matches)) {
								// "LAME3.100" -> "LAME3.100.1", but avoid including "(alpha)" and similar
								$info['mpeg']['audio']['LAME']['short_version'] = $matches[0];
							}
						}
						$info['audio']['encoder'] = $PossiblyLongerLAMEversion_NewString;
					}
				}
			}
		}
		if (!empty($info['audio']['encoder'])) {
			$info['audio']['encoder'] = rtrim($info['audio']['encoder'], "\x00 ");
		}

switch (isset($info['mpeg']['audio']['layer']) ? $info['mpeg']['audio']['layer'] : '') {
			case 1:
			case 2:
				$info['audio']['dataformat'] = 'mp'.$info['mpeg']['audio']['layer'];
				break;
		}
		if (isset($info['fileformat']) && ($info['fileformat'] == 'mp3')) {
			switch ($info['audio']['dataformat']) {
				case 'mp1':
				case 'mp2':
				case 'mp3':
					$info['fileformat'] = $info['audio']['dataformat'];
					break;

default:
					$this->warning('Expecting [audio][dataformat] to be mp1/mp2/mp3 when fileformat == mp3, [audio][dataformat] actually "'.$info['audio']['dataformat'].'"');
					break;
			}
		}

if (empty($info['fileformat'])) {
			unset($info['fileformat']);
			unset($info['audio']['bitrate_mode']);
			unset($info['avdataoffset']);
			unset($info['avdataend']);
			return false;
		}

$info['mime_type']         = 'audio/mpeg';
		$info['audio']['lossless'] = false;

// Calculate playtime
		if (!isset($info['playtime_seconds']) && isset($info['audio']['bitrate']) && ($info['audio']['bitrate'] > 0)) {
			// https://github.com/JamesHeinrich/getID3/issues/161
			// VBR header frame contains ~0.026s of silent audio data, but is not actually part of the original encoding and should be ignored
			$xingVBRheaderFrameLength = ((isset($info['mpeg']['audio']['VBR_frames']) && isset($info['mpeg']['audio']['framelength'])) ? $info['mpeg']['audio']['framelength'] : 0);

$info['playtime_seconds'] = ($info['avdataend'] - $info['avdataoffset'] - $xingVBRheaderFrameLength) * 8 / $info['audio']['bitrate'];
		}

$info['audio']['encoder_options'] = $this->GuessEncoderOptions();

return true;
	}

/**
	 * @return string
	 */
	public function GuessEncoderOptions() {
		// shortcuts
		$info = &$this->getid3->info;
		$thisfile_mpeg_audio = array();
		$thisfile_mpeg_audio_lame = array();
		if (!empty($info['mpeg']['audio'])) {
			$thisfile_mpeg_audio = &$info['mpeg']['audio'];
			if (!empty($thisfile_mpeg_audio['LAME'])) {
				$thisfile_mpeg_audio_lame = &$thisfile_mpeg_audio['LAME'];
			}
		}

$encoder_options = '';
		static $NamedPresetBitrates = array(16, 24, 40, 56, 112, 128, 160, 192, 256);

if (isset($thisfile_mpeg_audio['VBR_method']) && ($thisfile_mpeg_audio['VBR_method'] == 'Fraunhofer') && !empty($thisfile_mpeg_audio['VBR_quality'])) {

$encoder_options = 'VBR q'.$thisfile_mpeg_audio['VBR_quality'];

} elseif (!empty($thisfile_mpeg_audio_lame['preset_used']) && isset($thisfile_mpeg_audio_lame['preset_used_id']) && (!in_array($thisfile_mpeg_audio_lame['preset_used_id'], $NamedPresetBitrates))) {

$encoder_options = $thisfile_mpeg_audio_lame['preset_used'];

} elseif (!empty($thisfile_mpeg_audio_lame['vbr_quality'])) {

static $KnownEncoderValues = array();
			if (empty($KnownEncoderValues)) {

//$KnownEncoderValues[abrbitrate_minbitrate][vbr_quality][raw_vbr_method][raw_noise_shaping][raw_stereo_mode][ath_type][lowpass_frequency] = 'preset name';
				$KnownEncoderValues[0xFF][58][1][1][3][2][20500] = '--alt-preset insane';        // 3.90,   3.90.1, 3.92
				$KnownEncoderValues[0xFF][58][1][1][3][2][20600] = '--alt-preset insane';        // 3.90.2, 3.90.3, 3.91
				$KnownEncoderValues[0xFF][57][1][1][3][4][20500] = '--alt-preset insane';        // 3.94,   3.95
				$KnownEncoderValues['**'][78][3][2][3][2][19500] = '--alt-preset extreme';       // 3.90,   3.90.1, 3.92
				$KnownEncoderValues['**'][78][3][2][3][2][19600] = '--alt-preset extreme';       // 3.90.2, 3.91
				$KnownEncoderValues['**'][78][3][1][3][2][19600] = '--alt-preset extreme';       // 3.90.3
				$KnownEncoderValues['**'][78][4][2][3][2][19500] = '--alt-preset fast extreme';  // 3.90,   3.90.1, 3.92
				$KnownEncoderValues['**'][78][4][2][3][2][19600] = '--alt-preset fast extreme';  // 3.90.2, 3.90.3, 3.91
				$KnownEncoderValues['**'][78][3][2][3][4][19000] = '--alt-preset standard';      // 3.90,   3.90.1, 3.90.2, 3.91, 3.92
				$KnownEncoderValues['**'][78][3][1][3][4][19000] = '--alt-preset standard';      // 3.90.3
				$KnownEncoderValues['**'][78][4][2][3][4][19000] = '--alt-preset fast standard'; // 3.90,   3.90.1, 3.90.2, 3.91, 3.92
				$KnownEncoderValues['**'][78][4][1][3][4][19000] = '--alt-preset fast standard'; // 3.90.3
				$KnownEncoderValues['**'][88][4][1][3][3][19500] = '--r3mix';                    // 3.90,   3.90.1, 3.92
				$KnownEncoderValues['**'][88][4][1][3][3][19600] = '--r3mix';                    // 3.90.2, 3.90.3, 3.91
				$KnownEncoderValues['**'][67][4][1][3][4][18000] = '--r3mix';                    // 3.94,   3.95
				$KnownEncoderValues['**'][68][3][2][3][4][18000] = '--alt-preset medium';        // 3.90.3
				$KnownEncoderValues['**'][68][4][2][3][4][18000] = '--alt-preset fast medium';   // 3.90.3

$KnownEncoderValues[0xFF][99][1][1][1][2][0]     = '--preset studio';            // 3.90,   3.90.1, 3.90.2, 3.91, 3.92
				$KnownEncoderValues[0xFF][58][2][1][3][2][20600] = '--preset studio';            // 3.90.3, 3.93.1
				$KnownEncoderValues[0xFF][58][2][1][3][2][20500] = '--preset studio';            // 3.93
				$KnownEncoderValues[0xFF][57][2][1][3][4][20500] = '--preset studio';            // 3.94,   3.95
				$KnownEncoderValues[0xC0][88][1][1][1][2][0]     = '--preset cd';                // 3.90,   3.90.1, 3.90.2,   3.91, 3.92
				$KnownEncoderValues[0xC0][58][2][2][3][2][19600] = '--preset cd';                // 3.90.3, 3.93.1
				$KnownEncoderValues[0xC0][58][2][2][3][2][19500] = '--preset cd';                // 3.93
				$KnownEncoderValues[0xC0][57][2][1][3][4][19500] = '--preset cd';                // 3.94,   3.95
				$KnownEncoderValues[0xA0][78][1][1][3][2][18000] = '--preset hifi';              // 3.90,   3.90.1, 3.90.2,   3.91, 3.92
				$KnownEncoderValues[0xA0][58][2][2][3][2][18000] = '--preset hifi';              // 3.90.3, 3.93,   3.93.1
				$KnownEncoderValues[0xA0][57][2][1][3][4][18000] = '--preset hifi';              // 3.94,   3.95
				$KnownEncoderValues[0x80][67][1][1][3][2][18000] = '--preset tape';              // 3.90,   3.90.1, 3.90.2,   3.91, 3.92
				$KnownEncoderValues[0x80][67][1][1][3][2][15000] = '--preset radio';             // 3.90,   3.90.1, 3.90.2,   3.91, 3.92
				$KnownEncoderValues[0x70][67][1][1][3][2][15000] = '--preset fm';                // 3.90,   3.90.1, 3.90.2,   3.91, 3.92
				$KnownEncoderValues[0x70][58][2][2][3][2][16000] = '--preset tape/radio/fm';     // 3.90.3, 3.93,   3.93.1
				$KnownEncoderValues[0x70][57][2][1][3][4][16000] = '--preset tape/radio/fm';     // 3.94,   3.95
				$KnownEncoderValues[0x38][58][2][2][0][2][10000] = '--preset voice';             // 3.90.3, 3.93,   3.93.1
				$KnownEncoderValues[0x38][57][2][1][0][4][15000] = '--preset voice';             // 3.94,   3.95
				$KnownEncoderValues[0x38][57][2][1][0][4][16000] = '--preset voice';             // 3.94a14
				$KnownEncoderValues[0x28][65][1][1][0][2][7500]  = '--preset mw-us';             // 3.90,   3.90.1, 3.92
				$KnownEncoderValues[0x28][65][1][1][0][2][7600]  = '--preset mw-us';             // 3.90.2, 3.91
				$KnownEncoderValues[0x28][58][2][2][0][2][7000]  = '--preset mw-us';             // 3.90.3, 3.93,   3.93.1
				$KnownEncoderValues[0x28][57][2][1][0][4][10500] = '--preset mw-us';             // 3.94,   3.95
				$KnownEncoderValues[0x28][57][2][1][0][4][11200] = '--preset mw-us';             // 3.94a14
				$KnownEncoderValues[0x28][57][2][1][0][4][8800]  = '--preset mw-us';             // 3.94a15
				$KnownEncoderValues[0x18][58][2][2][0][2][4000]  = '--preset phon+/lw/mw-eu/sw'; // 3.90.3, 3.93.1
				$KnownEncoderValues[0x18][58][2][2][0][2][3900]  = '--preset phon+/lw/mw-eu/sw'; // 3.93
				$KnownEncoderValues[0x18][57][2][1][0][4][5900]  = '--preset phon+/lw/mw-eu/sw'; // 3.94,   3.95
				$KnownEncoderValues[0x18][57][2][1][0][4][6200]  = '--preset phon+/lw/mw-eu/sw'; // 3.94a14
				$KnownEncoderValues[0x18][57][2][1][0][4][3200]  = '--preset phon+/lw/mw-eu/sw'; // 3.94a15
				$KnownEncoderValues[0x10][58][2][2][0][2][3800]  = '--preset phone';             // 3.90.3, 3.93.1
				$KnownEncoderValues[0x10][58][2][2][0][2][3700]  = '--preset phone';             // 3.93
				$KnownEncoderValues[0x10][57][2][1][0][4][5600]  = '--preset phone';             // 3.94,   3.95
			}

if (isset($KnownEncoderValues[$thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate']][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']])) {

$encoder_options = $KnownEncoderValues[$thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate']][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']];

} elseif (isset($KnownEncoderValues['**'][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']])) {

$encoder_options = $KnownEncoderValues['**'][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']];

} elseif ($info['audio']['bitrate_mode'] == 'vbr') {

// http://gabriel.mp3-tech.org/mp3infotag.html
				// int    Quality = (100 - 10 * gfp->VBR_q - gfp->quality)h

$LAME_V_value = 10 - ceil($thisfile_mpeg_audio_lame['vbr_quality'] / 10);
				$LAME_q_value = 100 - $thisfile_mpeg_audio_lame['vbr_quality'] - ($LAME_V_value * 10);
				$encoder_options = '-V'.$LAME_V_value.' -q'.$LAME_q_value;

} elseif ($info['audio']['bitrate_mode'] == 'cbr') {

$encoder_options = strtoupper($info['audio']['bitrate_mode']).ceil($info['audio']['bitrate'] / 1000);

} else {

$encoder_options = strtoupper($info['audio']['bitrate_mode']);

}

} elseif (!empty($thisfile_mpeg_audio_lame['bitrate_abr'])) {

$encoder_options = 'ABR'.$thisfile_mpeg_audio_lame['bitrate_abr'];

} elseif (!empty($info['audio']['bitrate'])) {

if ($info['audio']['bitrate_mode'] == 'cbr') {
				if ($info['audio']['bitrate'] == 'free') {
					$encoder_options = strtoupper($info['audio']['bitrate_mode']);
				} else {
					$encoder_options = strtoupper($info['audio']['bitrate_mode']).round($info['audio']['bitrate'] / 1000);
				}
			} else {
				$encoder_options = strtoupper($info['audio']['bitrate_mode']);
			}

}
		if (!empty($thisfile_mpeg_audio_lame['bitrate_min'])) {
			$encoder_options .= ' -b'.$thisfile_mpeg_audio_lame['bitrate_min'];
		}

if (isset($thisfile_mpeg_audio['bitrate']) && ($thisfile_mpeg_audio['bitrate'] === 'free')) {
			$encoder_options .= ' --freeformat';
		}

if (!empty($thisfile_mpeg_audio_lame['encoding_flags']['nogap_prev']) || !empty($thisfile_mpeg_audio_lame['encoding_flags']['nogap_next'])) {
			$encoder_options .= ' --nogap';
		}

if (!empty($thisfile_mpeg_audio_lame['lowpass_frequency'])) {
			$ExplodedOptions = explode(' ', $encoder_options, 4);
			if ($ExplodedOptions[0] == '--r3mix') {
				$ExplodedOptions[1] = 'r3mix';
			}
			switch ($ExplodedOptions[0]) {
				case '--preset':
				case '--alt-preset':
				case '--r3mix':
					if ($ExplodedOptions[1] == 'fast') {
						$ExplodedOptions[1] .= ' '.$ExplodedOptions[2];
					}
					switch ($ExplodedOptions[1]) {
						case 'portable':
						case 'medium':
						case 'standard':
						case 'extreme':
						case 'insane':
						case 'fast portable':
						case 'fast medium':
						case 'fast standard':
						case 'fast extreme':
						case 'fast insane':
						case 'r3mix':
							static $ExpectedLowpass = array(
									'insane|20500'        => 20500,
									'insane|20600'        => 20600,  // 3.90.2, 3.90.3, 3.91
									'medium|18000'        => 18000,
									'fast medium|18000'   => 18000,
									'extreme|19500'       => 19500,  // 3.90,   3.90.1, 3.92, 3.95
									'extreme|19600'       => 19600,  // 3.90.2, 3.90.3, 3.91, 3.93.1
									'fast extreme|19500'  => 19500,  // 3.90,   3.90.1, 3.92, 3.95
									'fast extreme|19600'  => 19600,  // 3.90.2, 3.90.3, 3.91, 3.93.1
									'standard|19000'      => 19000,
									'fast standard|19000' => 19000,
									'r3mix|19500'         => 19500,  // 3.90,   3.90.1, 3.92
									'r3mix|19600'         => 19600,  // 3.90.2, 3.90.3, 3.91
									'r3mix|18000'         => 18000,  // 3.94,   3.95
								);
							if (!isset($ExpectedLowpass[$ExplodedOptions[1].'|'.$thisfile_mpeg_audio_lame['lowpass_frequency']]) && ($thisfile_mpeg_audio_lame['lowpass_frequency'] < 22050) && (round($thisfile_mpeg_audio_lame['lowpass_frequency'] / 1000) < round($thisfile_mpeg_audio['sample_rate'] / 2000))) {
								$encoder_options .= ' --lowpass '.$thisfile_mpeg_audio_lame['lowpass_frequency'];
							}
							break;

default:
							break;
					}
					break;
			}
		}

if (isset($thisfile_mpeg_audio_lame['raw']['source_sample_freq'])) {
			if (($thisfile_mpeg_audio['sample_rate'] == 44100) && ($thisfile_mpeg_audio_lame['raw']['source_sample_freq'] != 1)) {
				$encoder_options .= ' --resample 44100';
			} elseif (($thisfile_mpeg_audio['sample_rate'] == 48000) && ($thisfile_mpeg_audio_lame['raw']['source_sample_freq'] != 2)) {
				$encoder_options .= ' --resample 48000';
			} elseif ($thisfile_mpeg_audio['sample_rate'] < 44100) {
				switch ($thisfile_mpeg_audio_lame['raw']['source_sample_freq']) {
					case 0: // <= 32000
						// may or may not be same as source frequency - ignore
						break;
					case 1: // 44100
					case 2: // 48000
					case 3: // 48000+
						$ExplodedOptions = explode(' ', $encoder_options, 4);
						switch ($ExplodedOptions[0]) {
							case '--preset':
							case '--alt-preset':
								switch ($ExplodedOptions[1]) {
									case 'fast':
									case 'portable':
									case 'medium':
									case 'standard':
									case 'extreme':
									case 'insane':
										$encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate'];
										break;

default:
										static $ExpectedResampledRate = array(
												'phon+/lw/mw-eu/sw|16000' => 16000,
												'mw-us|24000'             => 24000, // 3.95
												'mw-us|32000'             => 32000, // 3.93
												'mw-us|16000'             => 16000, // 3.92
												'phone|16000'             => 16000,
												'phone|11025'             => 11025, // 3.94a15
												'radio|32000'             => 32000, // 3.94a15
												'fm/radio|32000'          => 32000, // 3.92
												'fm|32000'                => 32000, // 3.90
												'voice|32000'             => 32000);
										if (!isset($ExpectedResampledRate[$ExplodedOptions[1].'|'.$thisfile_mpeg_audio['sample_rate']])) {
											$encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate'];
										}
										break;
								}
								break;

case '--r3mix':
							default:
								$encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate'];
								break;
						}
						break;
				}
			}
		}
		if (empty($encoder_options) && !empty($info['audio']['bitrate']) && !empty($info['audio']['bitrate_mode'])) {
			//$encoder_options = strtoupper($info['audio']['bitrate_mode']).ceil($info['audio']['bitrate'] / 1000);
			$encoder_options = strtoupper($info['audio']['bitrate_mode']);
		}

return $encoder_options;
	}

/**
	 * @param int   $offset
	 * @param array $info
	 * @param bool  $recursivesearch
	 * @param bool  $ScanAsCBR
	 * @param bool  $FastMPEGheaderScan
	 *
	 * @return bool
	 */
	public function decodeMPEGaudioHeader($offset, &$info, $recursivesearch=true, $ScanAsCBR=false, $FastMPEGheaderScan=false) {
		static $MPEGaudioVersionLookup;
		static $MPEGaudioLayerLookup;
		static $MPEGaudioBitrateLookup;
		static $MPEGaudioFrequencyLookup;
		static $MPEGaudioChannelModeLookup;
		static $MPEGaudioModeExtensionLookup;
		static $MPEGaudioEmphasisLookup;
		if (empty($MPEGaudioVersionLookup)) {
			$MPEGaudioVersionLookup       = self::MPEGaudioVersionArray();
			$MPEGaudioLayerLookup         = self::MPEGaudioLayerArray();
			$MPEGaudioBitrateLookup       = self::MPEGaudioBitrateArray();
			$MPEGaudioFrequencyLookup     = self::MPEGaudioFrequencyArray();
			$MPEGaudioChannelModeLookup   = self::MPEGaudioChannelModeArray();
			$MPEGaudioModeExtensionLookup = self::MPEGaudioModeExtensionArray();
			$MPEGaudioEmphasisLookup      = self::MPEGaudioEmphasisArray();
		}

if ($this->fseek($offset) != 0) {
			$this->error('decodeMPEGaudioHeader() failed to seek to next offset at '.$offset);
			return false;
		}
		//$headerstring = $this->fread(1441); // worst-case max length = 32kHz @ 320kbps layer 3 = 1441 bytes/frame
		$headerstring = $this->fread(226); // LAME header at offset 36 + 190 bytes of Xing/LAME data

// MP3 audio frame structure:
		// $aa $aa $aa $aa [$bb $bb] $cc...
		// where $aa..$aa is the four-byte mpeg-audio header (below)
		// $bb $bb is the optional 2-byte CRC
		// and $cc... is the audio data

$head4 = substr($headerstring, 0, 4);
		$head4_key = getid3_lib::PrintHexBytes($head4, true, false, false);
		static $MPEGaudioHeaderDecodeCache = array();
		if (isset($MPEGaudioHeaderDecodeCache[$head4_key])) {
			$MPEGheaderRawArray = $MPEGaudioHeaderDecodeCache[$head4_key];
		} else {
			$MPEGheaderRawArray = self::MPEGaudioHeaderDecode($head4);
			$MPEGaudioHeaderDecodeCache[$head4_key] = $MPEGheaderRawArray;
		}

static $MPEGaudioHeaderValidCache = array();
		if (!isset($MPEGaudioHeaderValidCache[$head4_key])) { // Not in cache
			//$MPEGaudioHeaderValidCache[$head4_key] = self::MPEGaudioHeaderValid($MPEGheaderRawArray, false, true);  // allow badly-formatted freeformat (from LAME 3.90 - 3.93.1)
			$MPEGaudioHeaderValidCache[$head4_key] = self::MPEGaudioHeaderValid($MPEGheaderRawArray, false, false);
		}

// shortcut
		if (!isset($info['mpeg']['audio'])) {
			$info['mpeg']['audio'] = array();
		}
		$thisfile_mpeg_audio = &$info['mpeg']['audio'];

if ($MPEGaudioHeaderValidCache[$head4_key]) {
			$thisfile_mpeg_audio['raw'] = $MPEGheaderRawArray;
		} else {
			$this->warning('Invalid MPEG audio header ('.getid3_lib::PrintHexBytes($head4).') at offset '.$offset);
			return false;
		}

if (!$FastMPEGheaderScan) {
			$thisfile_mpeg_audio['version']       = $MPEGaudioVersionLookup[$thisfile_mpeg_audio['raw']['version']];
			$thisfile_mpeg_audio['layer']         = $MPEGaudioLayerLookup[$thisfile_mpeg_audio['raw']['layer']];

$thisfile_mpeg_audio['channelmode']   = $MPEGaudioChannelModeLookup[$thisfile_mpeg_audio['raw']['channelmode']];
			$thisfile_mpeg_audio['channels']      = (($thisfile_mpeg_audio['channelmode'] == 'mono') ? 1 : 2);
			$thisfile_mpeg_audio['sample_rate']   = $MPEGaudioFrequencyLookup[$thisfile_mpeg_audio['version']][$thisfile_mpeg_audio['raw']['sample_rate']];
			$thisfile_mpeg_audio['protection']    = !$thisfile_mpeg_audio['raw']['protection'];
			$thisfile_mpeg_audio['private']       = (bool) $thisfile_mpeg_audio['raw']['private'];
			$thisfile_mpeg_audio['modeextension'] = $MPEGaudioModeExtensionLookup[$thisfile_mpeg_audio['layer']][$thisfile_mpeg_audio['raw']['modeextension']];
			$thisfile_mpeg_audio['copyright']     = (bool) $thisfile_mpeg_audio['raw']['copyright'];
			$thisfile_mpeg_audio['original']      = (bool) $thisfile_mpeg_audio['raw']['original'];
			$thisfile_mpeg_audio['emphasis']      = $MPEGaudioEmphasisLookup[$thisfile_mpeg_audio['raw']['emphasis']];

$info['audio']['channels']    = $thisfile_mpeg_audio['channels'];
			$info['audio']['sample_rate'] = $thisfile_mpeg_audio['sample_rate'];

if ($thisfile_mpeg_audio['protection']) {
				$thisfile_mpeg_audio['crc'] = getid3_lib::BigEndian2Int(substr($headerstring, 4, 2));
			}
		}

if ($thisfile_mpeg_audio['raw']['bitrate'] == 15) {
			// http://www.hydrogenaudio.org/?act=ST&f=16&t=9682&st=0
			$this->warning('Invalid bitrate index (15), this is a known bug in free-format MP3s encoded by LAME v3.90 - 3.93.1');
			$thisfile_mpeg_audio['raw']['bitrate'] = 0;
		}
		$thisfile_mpeg_audio['padding'] = (bool) $thisfile_mpeg_audio['raw']['padding'];
		$thisfile_mpeg_audio['bitrate'] = $MPEGaudioBitrateLookup[$thisfile_mpeg_audio['version']][$thisfile_mpeg_audio['layer']][$thisfile_mpeg_audio['raw']['bitrate']];

if (($thisfile_mpeg_audio['bitrate'] == 'free') && ($offset == $info['avdataoffset'])) {
			// only skip multiple frame check if free-format bitstream found at beginning of file
			// otherwise is quite possibly simply corrupted data
			$recursivesearch = false;
		}

// For Layer 2 there are some combinations of bitrate and mode which are not allowed.
		if (!$FastMPEGheaderScan && ($thisfile_mpeg_audio['layer'] == '2')) {

$info['audio']['dataformat'] = 'mp2';
			switch ($thisfile_mpeg_audio['channelmode']) {

case 'mono':
					if (($thisfile_mpeg_audio['bitrate'] == 'free') || ($thisfile_mpeg_audio['bitrate'] <= 192000)) {
						// these are ok
					} else {
						$this->error($thisfile_mpeg_audio['bitrate'].'kbps not allowed in Layer 2, '.$thisfile_mpeg_audio['channelmode'].'.');
						return false;
					}
					break;

case 'stereo':
				case 'joint stereo':
				case 'dual channel':
					if (($thisfile_mpeg_audio['bitrate'] == 'free') || ($thisfile_mpeg_audio['bitrate'] == 64000) || ($thisfile_mpeg_audio['bitrate'] >= 96000)) {
						// these are ok
					} else {
						$this->error(intval(round($thisfile_mpeg_audio['bitrate'] / 1000)).'kbps not allowed in Layer 2, '.$thisfile_mpeg_audio['channelmode'].'.');
						return false;
					}
					break;

}

if ($info['audio']['sample_rate'] > 0) {
			$thisfile_mpeg_audio['framelength'] = self::MPEGaudioFrameLength($thisfile_mpeg_audio['bitrate'], $thisfile_mpeg_audio['version'], $thisfile_mpeg_audio['layer'], (int) $thisfile_mpeg_audio['padding'], $info['audio']['sample_rate']);
		}

$nextframetestoffset = $offset + 1;
		if ($thisfile_mpeg_audio['bitrate'] != 'free') {

$info['audio']['bitrate'] = $thisfile_mpeg_audio['bitrate'];

if (isset($thisfile_mpeg_audio['framelength'])) {
				$nextframetestoffset = $offset + $thisfile_mpeg_audio['framelength'];
			} else {
				$this->error('Frame at offset('.$offset.') is has an invalid frame length.');
				return false;
			}

}

$ExpectedNumberOfAudioBytes = 0;

////////////////////////////////////////////////////////////////////////////////////
		// Variable-bitrate headers

if (substr($headerstring, 4 + 32, 4) == 'VBRI') {
			// Fraunhofer VBR header is hardcoded 'VBRI' at offset 0x24 (36)
			// specs taken from http://minnie.tuhs.org/pipermail/mp3encoder/2001-January/001800.html

$thisfile_mpeg_audio['bitrate_mode'] = 'vbr';
			$thisfile_mpeg_audio['VBR_method']   = 'Fraunhofer';
			$info['audio']['codec']              = 'Fraunhofer';

$SideInfoData = substr($headerstring, 4 + 2, 32);

$FraunhoferVBROffset = 36;

$thisfile_mpeg_audio['VBR_encoder_version']     = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset +  4, 2)); // VbriVersion
			$thisfile_mpeg_audio['VBR_encoder_delay']       = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset +  6, 2)); // VbriDelay
			$thisfile_mpeg_audio['VBR_quality']             = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset +  8, 2)); // VbriQuality
			$thisfile_mpeg_audio['VBR_bytes']               = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 10, 4)); // VbriStreamBytes
			$thisfile_mpeg_audio['VBR_frames']              = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 14, 4)); // VbriStreamFrames
			$thisfile_mpeg_audio['VBR_seek_offsets']        = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 18, 2)); // VbriTableSize
			$thisfile_mpeg_audio['VBR_seek_scale']          = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 20, 2)); // VbriTableScale
			$thisfile_mpeg_audio['VBR_entry_bytes']         = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 22, 2)); // VbriEntryBytes
			$thisfile_mpeg_audio['VBR_entry_frames']        = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 24, 2)); // VbriEntryFrames

$ExpectedNumberOfAudioBytes = $thisfile_mpeg_audio['VBR_bytes'];

$previousbyteoffset = $offset;
			for ($i = 0; $i < $thisfile_mpeg_audio['VBR_seek_offsets']; $i++) {
				$Fraunhofer_OffsetN = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset, $thisfile_mpeg_audio['VBR_entry_bytes']));
				$FraunhoferVBROffset += $thisfile_mpeg_audio['VBR_entry_bytes'];
				$thisfile_mpeg_audio['VBR_offsets_relative'][$i] = ($Fraunhofer_OffsetN * $thisfile_mpeg_audio['VBR_seek_scale']);
				$thisfile_mpeg_audio['VBR_offsets_absolute'][$i] = ($Fraunhofer_OffsetN * $thisfile_mpeg_audio['VBR_seek_scale']) + $previousbyteoffset;
				$previousbyteoffset += $Fraunhofer_OffsetN;
			}

} else {

// Xing VBR header is hardcoded 'Xing' at a offset 0x0D (13), 0x15 (21) or 0x24 (36)
			// depending on MPEG layer and number of channels

$VBRidOffset = self::XingVBRidOffset($thisfile_mpeg_audio['version'], $thisfile_mpeg_audio['channelmode']);
			$SideInfoData = substr($headerstring, 4 + 2, $VBRidOffset - 4);

if ((substr($headerstring, $VBRidOffset, strlen('Xing')) == 'Xing') || (substr($headerstring, $VBRidOffset, strlen('Info')) == 'Info')) {
				// 'Xing' is traditional Xing VBR frame
				// 'Info' is LAME-encoded CBR (This was done to avoid CBR files to be recognized as traditional Xing VBR files by some decoders.)
				// 'Info' *can* legally be used to specify a VBR file as well, however.

// http://www.multiweb.cz/twoinches/MP3inside.htm
				//00..03 = "Xing" or "Info"
				//04..07 = Flags:
				//  0x01  Frames Flag     set if value for number of frames in file is stored
				//  0x02  Bytes Flag      set if value for filesize in bytes is stored
				//  0x04  TOC Flag        set if values for TOC are stored
				//  0x08  VBR Scale Flag  set if values for VBR scale is stored
				//08..11  Frames: Number of frames in file (including the first Xing/Info one)
				//12..15  Bytes:  File length in Bytes
				//16..115  TOC (Table of Contents):
				//  Contains of 100 indexes (one Byte length) for easier lookup in file. Approximately solves problem with moving inside file.
				//  Each Byte has a value according this formula:
				//  (TOC[i] / 256) * fileLenInBytes
				//  So if song lasts eg. 240 sec. and you want to jump to 60. sec. (and file is 5 000 000 Bytes length) you can use:
				//  TOC[(60/240)*100] = TOC[25]
				//  and corresponding Byte in file is then approximately at:
				//  (TOC[25]/256) * 5000000
				//116..119  VBR Scale

// should be safe to leave this at 'vbr' and let it be overriden to 'cbr' if a CBR preset/mode is used by LAME
//				if (substr($headerstring, $VBRidOffset, strlen('Info')) == 'Xing') {
					$thisfile_mpeg_audio['bitrate_mode'] = 'vbr';
					$thisfile_mpeg_audio['VBR_method']   = 'Xing';
//				} else {
//					$ScanAsCBR = true;
//					$thisfile_mpeg_audio['bitrate_mode'] = 'cbr';
//				}

$thisfile_mpeg_audio['xing_flags_raw'] = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset + 4, 4));

$thisfile_mpeg_audio['xing_flags']['frames']    = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000001);
				$thisfile_mpeg_audio['xing_flags']['bytes']     = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000002);
				$thisfile_mpeg_audio['xing_flags']['toc']       = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000004);
				$thisfile_mpeg_audio['xing_flags']['vbr_scale'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000008);

if ($thisfile_mpeg_audio['xing_flags']['frames']) {
					$thisfile_mpeg_audio['VBR_frames'] = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset +  8, 4));
					//$thisfile_mpeg_audio['VBR_frames']--; // don't count header Xing/Info frame
				}
				if ($thisfile_mpeg_audio['xing_flags']['bytes']) {
					$thisfile_mpeg_audio['VBR_bytes']  = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset + 12, 4));
				}

//if (($thisfile_mpeg_audio['bitrate'] == 'free') && !empty($thisfile_mpeg_audio['VBR_frames']) && !empty($thisfile_mpeg_audio['VBR_bytes'])) {
				//if (!empty($thisfile_mpeg_audio['VBR_frames']) && !empty($thisfile_mpeg_audio['VBR_bytes'])) {
				if (!empty($thisfile_mpeg_audio['VBR_frames'])) {
					$used_filesize  = 0;
					if (!empty($thisfile_mpeg_audio['VBR_bytes'])) {
						$used_filesize = $thisfile_mpeg_audio['VBR_bytes'];
					} elseif (!empty($info['filesize'])) {
						$used_filesize  = $info['filesize'];
						$used_filesize -= (isset($info['id3v2']['headerlength']) ? intval($info['id3v2']['headerlength']) : 0);
						$used_filesize -= (isset($info['id3v1']) ? 128 : 0);
						$used_filesize -= (isset($info['tag_offset_end']) ? $info['tag_offset_end'] - $info['tag_offset_start'] : 0);
						$this->warning('MP3.Xing header missing VBR_bytes, assuming MPEG audio portion of file is '.number_format($used_filesize).' bytes');
					}

$framelengthfloat = $used_filesize / $thisfile_mpeg_audio['VBR_frames'];

if ($thisfile_mpeg_audio['layer'] == '1') {
						// BitRate = (((FrameLengthInBytes / 4) - Padding) * SampleRate) / 12
						//$info['audio']['bitrate'] = ((($framelengthfloat / 4) - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 12;
						$info['audio']['bitrate'] = ($framelengthfloat / 4) * $thisfile_mpeg_audio['sample_rate'] * (2 / $info['audio']['channels']) / 12;
					} else {
						// Bitrate = ((FrameLengthInBytes - Padding) * SampleRate) / 144
						//$info['audio']['bitrate'] = (($framelengthfloat - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 144;
						$info['audio']['bitrate'] = $framelengthfloat * $thisfile_mpeg_audio['sample_rate'] * (2 / $info['audio']['channels']) / 144;
					}
					$thisfile_mpeg_audio['framelength'] = (int) floor($framelengthfloat);
				}

if ($thisfile_mpeg_audio['xing_flags']['toc']) {
					$LAMEtocData = substr($headerstring, $VBRidOffset + 16, 100);
					for ($i = 0; $i < 100; $i++) {
						$thisfile_mpeg_audio['toc'][$i] = ord($LAMEtocData[$i]);
					}
				}
				if ($thisfile_mpeg_audio['xing_flags']['vbr_scale']) {
					$thisfile_mpeg_audio['VBR_scale'] = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset + 116, 4));
				}

// http://gabriel.mp3-tech.org/mp3infotag.html
				if (substr($headerstring, $VBRidOffset + 120, 4) == 'LAME') {

// shortcut
					$thisfile_mpeg_audio['LAME'] = array();
					$thisfile_mpeg_audio_lame    = &$thisfile_mpeg_audio['LAME'];

$thisfile_mpeg_audio_lame['long_version']  = substr($headerstring, $VBRidOffset + 120, 20);
					$thisfile_mpeg_audio_lame['short_version'] = substr($thisfile_mpeg_audio_lame['long_version'], 0, 9);

//$thisfile_mpeg_audio_lame['numeric_version'] = str_replace('LAME', '', $thisfile_mpeg_audio_lame['short_version']);
					$thisfile_mpeg_audio_lame['numeric_version'] = '';
					if (preg_match('#^LAME([0-9\\.a-z]*)#', $thisfile_mpeg_audio_lame['long_version'], $matches)) {
						$thisfile_mpeg_audio_lame['short_version']   = $matches[0];
						$thisfile_mpeg_audio_lame['numeric_version'] = $matches[1];
					}
					if (strlen($thisfile_mpeg_audio_lame['numeric_version']) > 0) {
						foreach (explode('.', $thisfile_mpeg_audio_lame['numeric_version']) as $key => $number) {
							$thisfile_mpeg_audio_lame['integer_version'][$key] = intval($number);
						}
						//if ($thisfile_mpeg_audio_lame['short_version'] >= 'LAME3.90') {
						if ((($thisfile_mpeg_audio_lame['integer_version'][0] * 1000) + $thisfile_mpeg_audio_lame['integer_version'][1]) >= 3090) { // cannot use string version compare, may have "LAME3.90" or "LAME3.100" -- see https://github.com/JamesHeinrich/getID3/issues/207

// extra 11 chars are not part of version string when LAMEtag present
							unset($thisfile_mpeg_audio_lame['long_version']);

// It the LAME tag was only introduced in LAME v3.90
							// https://wiki.hydrogenaud.io/index.php/LAME#VBR_header_and_LAME_tag
							// https://hydrogenaud.io/index.php?topic=9933

// Offsets of various bytes in http://gabriel.mp3-tech.org/mp3infotag.html
							// are assuming a 'Xing' identifier offset of 0x24, which is the case for
							// MPEG-1 non-mono, but not for other combinations
							$LAMEtagOffsetContant = $VBRidOffset - 0x24;

// shortcuts
							$thisfile_mpeg_audio_lame['RGAD']    = array('track'=>array(), 'album'=>array());
							$thisfile_mpeg_audio_lame_RGAD       = &$thisfile_mpeg_audio_lame['RGAD'];
							$thisfile_mpeg_audio_lame_RGAD_track = &$thisfile_mpeg_audio_lame_RGAD['track'];
							$thisfile_mpeg_audio_lame_RGAD_album = &$thisfile_mpeg_audio_lame_RGAD['album'];
							$thisfile_mpeg_audio_lame['raw'] = array();
							$thisfile_mpeg_audio_lame_raw    = &$thisfile_mpeg_audio_lame['raw'];

// byte $9B  VBR Quality
							// This field is there to indicate a quality level, although the scale was not precised in the original Xing specifications.
							// Actually overwrites original Xing bytes
							unset($thisfile_mpeg_audio['VBR_scale']);
							$thisfile_mpeg_audio_lame['vbr_quality'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0x9B, 1));

// bytes $9C-$A4  Encoder short VersionString
							$thisfile_mpeg_audio_lame['short_version'] = substr($headerstring, $LAMEtagOffsetContant + 0x9C, 9);

// byte $A5  Info Tag revision + VBR method
							$LAMEtagRevisionVBRmethod = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xA5, 1));

$thisfile_mpeg_audio_lame['tag_revision']   = ($LAMEtagRevisionVBRmethod & 0xF0) >> 4;
							$thisfile_mpeg_audio_lame_raw['vbr_method'] =  $LAMEtagRevisionVBRmethod & 0x0F;
							$thisfile_mpeg_audio_lame['vbr_method']     = self::LAMEvbrMethodLookup($thisfile_mpeg_audio_lame_raw['vbr_method']);
							$thisfile_mpeg_audio['bitrate_mode']        = substr($thisfile_mpeg_audio_lame['vbr_method'], 0, 3); // usually either 'cbr' or 'vbr', but truncates 'vbr-old / vbr-rh' to 'vbr'

// byte $A6  Lowpass filter value
							$thisfile_mpeg_audio_lame['lowpass_frequency'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xA6, 1)) * 100;

// bytes $A7-$AE  Replay Gain
							// https://web.archive.org/web/20021015212753/http://privatewww.essex.ac.uk/~djmrob/replaygain/rg_data_format.html
							// bytes $A7-$AA : 32 bit floating point "Peak signal amplitude"
							if ($thisfile_mpeg_audio_lame['short_version'] >= 'LAME3.94b') {
								// LAME 3.94a16 and later - 9.23 fixed point
								// ie 0x0059E2EE / (2^23) = 5890798 / 8388608 = 0.7022378444671630859375
								$thisfile_mpeg_audio_lame_RGAD['peak_amplitude'] = (float) ((getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xA7, 4))) / 8388608);
							} else {
								// LAME 3.94a15 and earlier - 32-bit floating point
								// Actually 3.94a16 will fall in here too and be WRONG, but is hard to detect 3.94a16 vs 3.94a15
								$thisfile_mpeg_audio_lame_RGAD['peak_amplitude'] = getid3_lib::LittleEndian2Float(substr($headerstring, $LAMEtagOffsetContant + 0xA7, 4));
							}
							if ($thisfile_mpeg_audio_lame_RGAD['peak_amplitude'] == 0) {
								unset($thisfile_mpeg_audio_lame_RGAD['peak_amplitude']);
							} else {
								$thisfile_mpeg_audio_lame_RGAD['peak_db'] = getid3_lib::RGADamplitude2dB($thisfile_mpeg_audio_lame_RGAD['peak_amplitude']);
							}

$thisfile_mpeg_audio_lame_raw['RGAD_track']      =   getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xAB, 2));
							$thisfile_mpeg_audio_lame_raw['RGAD_album']      =   getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xAD, 2));

if ($thisfile_mpeg_audio_lame_raw['RGAD_track'] != 0) {

$thisfile_mpeg_audio_lame_RGAD_track['raw']['name']        = ($thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0xE000) >> 13;
								$thisfile_mpeg_audio_lame_RGAD_track['raw']['originator']  = ($thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0x1C00) >> 10;
								$thisfile_mpeg_audio_lame_RGAD_track['raw']['sign_bit']    = ($thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0x0200) >> 9;
								$thisfile_mpeg_audio_lame_RGAD_track['raw']['gain_adjust'] =  $thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0x01FF;
								$thisfile_mpeg_audio_lame_RGAD_track['name']       = getid3_lib::RGADnameLookup($thisfile_mpeg_audio_lame_RGAD_track['raw']['name']);
								$thisfile_mpeg_audio_lame_RGAD_track['originator'] = getid3_lib::RGADoriginatorLookup($thisfile_mpeg_audio_lame_RGAD_track['raw']['originator']);
								$thisfile_mpeg_audio_lame_RGAD_track['gain_db']    = getid3_lib::RGADadjustmentLookup($thisfile_mpeg_audio_lame_RGAD_track['raw']['gain_adjust'], $thisfile_mpeg_audio_lame_RGAD_track['raw']['sign_bit']);

if (!empty($thisfile_mpeg_audio_lame_RGAD['peak_amplitude'])) {
									$info['replay_gain']['track']['peak']   = $thisfile_mpeg_audio_lame_RGAD['peak_amplitude'];
								}
								$info['replay_gain']['track']['originator'] = $thisfile_mpeg_audio_lame_RGAD_track['originator'];
								$info['replay_gain']['track']['adjustment'] = $thisfile_mpeg_audio_lame_RGAD_track['gain_db'];
							} else {
								unset($thisfile_mpeg_audio_lame_RGAD['track']);
							}
							if ($thisfile_mpeg_audio_lame_raw['RGAD_album'] != 0) {

$thisfile_mpeg_audio_lame_RGAD_album['raw']['name']        = ($thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0xE000) >> 13;
								$thisfile_mpeg_audio_lame_RGAD_album['raw']['originator']  = ($thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0x1C00) >> 10;
								$thisfile_mpeg_audio_lame_RGAD_album['raw']['sign_bit']    = ($thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0x0200) >> 9;
								$thisfile_mpeg_audio_lame_RGAD_album['raw']['gain_adjust'] = $thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0x01FF;
								$thisfile_mpeg_audio_lame_RGAD_album['name']       = getid3_lib::RGADnameLookup($thisfile_mpeg_audio_lame_RGAD_album['raw']['name']);
								$thisfile_mpeg_audio_lame_RGAD_album['originator'] = getid3_lib::RGADoriginatorLookup($thisfile_mpeg_audio_lame_RGAD_album['raw']['originator']);
								$thisfile_mpeg_audio_lame_RGAD_album['gain_db']    = getid3_lib::RGADadjustmentLookup($thisfile_mpeg_audio_lame_RGAD_album['raw']['gain_adjust'], $thisfile_mpeg_audio_lame_RGAD_album['raw']['sign_bit']);

if (!empty($thisfile_mpeg_audio_lame_RGAD['peak_amplitude'])) {
									$info['replay_gain']['album']['peak']   = $thisfile_mpeg_audio_lame_RGAD['peak_amplitude'];
								}
								$info['replay_gain']['album']['originator'] = $thisfile_mpeg_audio_lame_RGAD_album['originator'];
								$info['replay_gain']['album']['adjustment'] = $thisfile_mpeg_audio_lame_RGAD_album['gain_db'];
							} else {
								unset($thisfile_mpeg_audio_lame_RGAD['album']);
							}
							if (empty($thisfile_mpeg_audio_lame_RGAD)) {
								unset($thisfile_mpeg_audio_lame['RGAD']);
							}

// byte $AF  Encoding flags + ATH Type
							$EncodingFlagsATHtype = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xAF, 1));
							$thisfile_mpeg_audio_lame['encoding_flags']['nspsytune']   = (bool) ($EncodingFlagsATHtype & 0x10);
							$thisfile_mpeg_audio_lame['encoding_flags']['nssafejoint'] = (bool) ($EncodingFlagsATHtype & 0x20);
							$thisfile_mpeg_audio_lame['encoding_flags']['nogap_next']  = (bool) ($EncodingFlagsATHtype & 0x40);
							$thisfile_mpeg_audio_lame['encoding_flags']['nogap_prev']  = (bool) ($EncodingFlagsATHtype & 0x80);
							$thisfile_mpeg_audio_lame['ath_type']                      =         $EncodingFlagsATHtype & 0x0F;

// byte $B0  if ABR {specified bitrate} else {minimal bitrate}
							$thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB0, 1));
							if ($thisfile_mpeg_audio_lame_raw['vbr_method'] == 2) { // Average BitRate (ABR)
								$thisfile_mpeg_audio_lame['bitrate_abr'] = $thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate'];
							} elseif ($thisfile_mpeg_audio_lame_raw['vbr_method'] == 1) { // Constant BitRate (CBR)
								// ignore
							} elseif ($thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate'] > 0) { // Variable BitRate (VBR) - minimum bitrate
								$thisfile_mpeg_audio_lame['bitrate_min'] = $thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate'];
							}

// bytes $B1-$B3  Encoder delays
							$EncoderDelays = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB1, 3));
							$thisfile_mpeg_audio_lame['encoder_delay'] = ($EncoderDelays & 0xFFF000) >> 12;
							$thisfile_mpeg_audio_lame['end_padding']   =  $EncoderDelays & 0x000FFF;

// byte $B4  Misc
							$MiscByte = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB4, 1));
							$thisfile_mpeg_audio_lame_raw['noise_shaping']       = ($MiscByte & 0x03);
							$thisfile_mpeg_audio_lame_raw['stereo_mode']         = ($MiscByte & 0x1C) >> 2;
							$thisfile_mpeg_audio_lame_raw['not_optimal_quality'] = ($MiscByte & 0x20) >> 5;
							$thisfile_mpeg_audio_lame_raw['source_sample_freq']  = ($MiscByte & 0xC0) >> 6;
							$thisfile_mpeg_audio_lame['noise_shaping']       = $thisfile_mpeg_audio_lame_raw['noise_shaping'];
							$thisfile_mpeg_audio_lame['stereo_mode']         = self::LAMEmiscStereoModeLookup($thisfile_mpeg_audio_lame_raw['stereo_mode']);
							$thisfile_mpeg_audio_lame['not_optimal_quality'] = (bool) $thisfile_mpeg_audio_lame_raw['not_optimal_quality'];
							$thisfile_mpeg_audio_lame['source_sample_freq']  = self::LAMEmiscSourceSampleFrequencyLookup($thisfile_mpeg_audio_lame_raw['source_sample_freq']);

// byte $B5  MP3 Gain
							$thisfile_mpeg_audio_lame_raw['mp3_gain'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB5, 1), false, true);
							$thisfile_mpeg_audio_lame['mp3_gain_db']     = (getid3_lib::RGADamplitude2dB(2) / 4) * $thisfile_mpeg_audio_lame_raw['mp3_gain'];
							$thisfile_mpeg_audio_lame['mp3_gain_factor'] = pow(2, ($thisfile_mpeg_audio_lame['mp3_gain_db'] / 6));

// bytes $B6-$B7  Preset and surround info
							$PresetSurroundBytes = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB6, 2));
							// Reserved                                                    = ($PresetSurroundBytes & 0xC000);
							$thisfile_mpeg_audio_lame_raw['surround_info'] = ($PresetSurroundBytes & 0x3800);
							$thisfile_mpeg_audio_lame['surround_info']     = self::LAMEsurroundInfoLookup($thisfile_mpeg_audio_lame_raw['surround_info']);
							$thisfile_mpeg_audio_lame['preset_used_id']    = ($PresetSurroundBytes & 0x07FF);
							$thisfile_mpeg_audio_lame['preset_used']       = self::LAMEpresetUsedLookup($thisfile_mpeg_audio_lame);
							if (!empty($thisfile_mpeg_audio_lame['preset_used_id']) && empty($thisfile_mpeg_audio_lame['preset_used'])) {
								$this->warning('Unknown LAME preset used ('.$thisfile_mpeg_audio_lame['preset_used_id'].') - please report to info@getid3.org');
							}
							if (($thisfile_mpeg_audio_lame['short_version'] == 'LAME3.90.') && !empty($thisfile_mpeg_audio_lame['preset_used_id'])) {
								// this may change if 3.90.4 ever comes out
								$thisfile_mpeg_audio_lame['short_version'] = 'LAME3.90.3';
							}

// bytes $B8-$BB  MusicLength
							$thisfile_mpeg_audio_lame['audio_bytes'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB8, 4));
							$ExpectedNumberOfAudioBytes = (($thisfile_mpeg_audio_lame['audio_bytes'] > 0) ? $thisfile_mpeg_audio_lame['audio_bytes'] : $thisfile_mpeg_audio['VBR_bytes']);

// bytes $BC-$BD  MusicCRC
							$thisfile_mpeg_audio_lame['music_crc']    = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xBC, 2));

// bytes $BE-$BF  CRC-16 of Info Tag
							$thisfile_mpeg_audio_lame['lame_tag_crc'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xBE, 2));

// LAME CBR
							if (($thisfile_mpeg_audio_lame_raw['vbr_method'] == 1) && ($thisfile_mpeg_audio['bitrate'] !== 'free')) {

$thisfile_mpeg_audio['bitrate_mode'] = 'cbr';
								$thisfile_mpeg_audio['bitrate'] = self::ClosestStandardMP3Bitrate($thisfile_mpeg_audio['bitrate']);
								$info['audio']['bitrate'] = $thisfile_mpeg_audio['bitrate'];
								//if (empty($thisfile_mpeg_audio['bitrate']) || (!empty($thisfile_mpeg_audio_lame['bitrate_min']) && ($thisfile_mpeg_audio_lame['bitrate_min'] != 255))) {
								//	$thisfile_mpeg_audio['bitrate'] = $thisfile_mpeg_audio_lame['bitrate_min'];
								//}

}

}
					}
				}

} else {

// not Fraunhofer or Xing VBR methods, most likely CBR (but could be VBR with no header)
				$thisfile_mpeg_audio['bitrate_mode'] = 'cbr';
				if ($recursivesearch) {
					$thisfile_mpeg_audio['bitrate_mode'] = 'vbr';
					if ($this->RecursiveFrameScanning($offset, $nextframetestoffset, true)) {
						$recursivesearch = false;
						$thisfile_mpeg_audio['bitrate_mode'] = 'cbr';
					}
					if ($thisfile_mpeg_audio['bitrate_mode'] == 'vbr') {
						$this->warning('VBR file with no VBR header. Bitrate values calculated from actual frame bitrates.');
					}
				}

}

if (($ExpectedNumberOfAudioBytes > 0) && ($ExpectedNumberOfAudioBytes != ($info['avdataend'] - $info['avdataoffset']))) {
			if ($ExpectedNumberOfAudioBytes > ($info['avdataend'] - $info['avdataoffset'])) {
				if ($this->isDependencyFor('matroska') || $this->isDependencyFor('riff')) {
					// ignore, audio data is broken into chunks so will always be data "missing"
				}
				elseif (($ExpectedNumberOfAudioBytes - ($info['avdataend'] - $info['avdataoffset'])) == 1) {
					$this->warning('Last byte of data truncated (this is a known bug in Meracl ID3 Tag Writer before v1.3.5)');
				}
				else {
					$this->warning('Probable truncated file: expecting '.$ExpectedNumberOfAudioBytes.' bytes of audio data, only found '.($info['avdataend'] - $info['avdataoffset']).' (short by '.($ExpectedNumberOfAudioBytes - ($info['avdataend'] - $info['avdataoffset'])).' bytes)');
				}
			} else {
				if ((($info['avdataend'] - $info['avdataoffset']) - $ExpectedNumberOfAudioBytes) == 1) {
				//	$prenullbytefileoffset = $this->ftell();
				//	$this->fseek($info['avdataend']);
				//	$PossibleNullByte = $this->fread(1);
				//	$this->fseek($prenullbytefileoffset);
				//	if ($PossibleNullByte === "\x00") {
						$info['avdataend']--;
				//		$this->warning('Extra null byte at end of MP3 data assumed to be RIFF padding and therefore ignored');
				//	} else {
				//		$this->warning('Too much data in file: expecting '.$ExpectedNumberOfAudioBytes.' bytes of audio data, found '.($info['avdataend'] - $info['avdataoffset']).' ('.(($info['avdataend'] - $info['avdataoffset']) - $ExpectedNumberOfAudioBytes).' bytes too many)');
				//	}
				} else {
					$this->warning('Too much data in file: expecting '.$ExpectedNumberOfAudioBytes.' bytes of audio data, found '.($info['avdataend'] - $info['avdataoffset']).' ('.(($info['avdataend'] - $info['avdataoffset']) - $ExpectedNumberOfAudioBytes).' bytes too many)');
				}
			}
		}

if (($thisfile_mpeg_audio['bitrate'] == 'free') && empty($info['audio']['bitrate'])) {
			if (($offset == $info['avdataoffset']) && empty($thisfile_mpeg_audio['VBR_frames'])) {
				$framebytelength = $this->FreeFormatFrameLength($offset, true);
				if ($framebytelength > 0) {
					$thisfile_mpeg_audio['framelength'] = $framebytelength;
					if ($thisfile_mpeg_audio['layer'] == '1') {
						// BitRate = (((FrameLengthInBytes / 4) - Padding) * SampleRate) / 12
						$info['audio']['bitrate'] = ((($framebytelength / 4) - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 12;
					} else {
						// Bitrate = ((FrameLengthInBytes - Padding) * SampleRate) / 144
						$info['audio']['bitrate'] = (($framebytelength - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 144;
					}
				} else {
					$this->error('Error calculating frame length of free-format MP3 without Xing/LAME header');
				}
			}
		}

if (isset($thisfile_mpeg_audio['VBR_frames']) ? $thisfile_mpeg_audio['VBR_frames'] : '') {
			switch ($thisfile_mpeg_audio['bitrate_mode']) {
				case 'vbr':
				case 'abr':
					$bytes_per_frame = 1152;
					if (($thisfile_mpeg_audio['version'] == '1') && ($thisfile_mpeg_audio['layer'] == 1)) {
						$bytes_per_frame = 384;
					} elseif ((($thisfile_mpeg_audio['version'] == '2') || ($thisfile_mpeg_audio['version'] == '2.5')) && ($thisfile_mpeg_audio['layer'] == 3)) {
						$bytes_per_frame = 576;
					}
					$thisfile_mpeg_audio['VBR_bitrate'] = (isset($thisfile_mpeg_audio['VBR_bytes']) ? (($thisfile_mpeg_audio['VBR_bytes'] / $thisfile_mpeg_audio['VBR_frames']) * 8) * ($info['audio']['sample_rate'] / $bytes_per_frame) : 0);
					if ($thisfile_mpeg_audio['VBR_bitrate'] > 0) {
						$info['audio']['bitrate']       = $thisfile_mpeg_audio['VBR_bitrate'];
						$thisfile_mpeg_audio['bitrate'] = $thisfile_mpeg_audio['VBR_bitrate']; // to avoid confusion
					}
					break;
			}
		}

// End variable-bitrate headers
		////////////////////////////////////////////////////////////////////////////////////

if ($recursivesearch) {

if (!$this->RecursiveFrameScanning($offset, $nextframetestoffset, $ScanAsCBR)) {
				return false;
			}
			if (!empty($this->getid3->info['mp3_validity_check_bitrates']) && !empty($thisfile_mpeg_audio['bitrate_mode']) && ($thisfile_mpeg_audio['bitrate_mode'] == 'vbr') && !empty($thisfile_mpeg_audio['VBR_bitrate'])) {
				// https://github.com/JamesHeinrich/getID3/issues/287
				if (count(array_keys($this->getid3->info['mp3_validity_check_bitrates'])) == 1) {
					list($cbr_bitrate_in_short_scan) = array_keys($this->getid3->info['mp3_validity_check_bitrates']);
					$deviation_cbr_from_header_bitrate = abs($thisfile_mpeg_audio['VBR_bitrate'] - $cbr_bitrate_in_short_scan) / $cbr_bitrate_in_short_scan;
					if ($deviation_cbr_from_header_bitrate < 0.01) {
						// VBR header bitrate may differ slightly from true bitrate of frames, perhaps accounting for overhead of VBR header frame itself?
						// If measured CBR bitrate is within 1% of specified bitrate in VBR header then assume that file is truly CBR
						$thisfile_mpeg_audio['bitrate_mode'] = 'cbr';
						//$this->warning('VBR header ignored, assuming CBR '.round($cbr_bitrate_in_short_scan / 1000).'kbps based on scan of '.$this->mp3_valid_check_frames.' frames');
					}
				}
			}
			if (isset($this->getid3->info['mp3_validity_check_bitrates'])) {
				unset($this->getid3->info['mp3_validity_check_bitrates']);
			}

}

//if (false) {
		//    // experimental side info parsing section - not returning anything useful yet
		//
		//    $SideInfoBitstream = getid3_lib::BigEndian2Bin($SideInfoData);
		//    $SideInfoOffset = 0;
		//
		//    if ($thisfile_mpeg_audio['version'] == '1') {
		//        if ($thisfile_mpeg_audio['channelmode'] == 'mono') {
		//            // MPEG-1 (mono)
		//            $thisfile_mpeg_audio['side_info']['main_data_begin'] = substr($SideInfoBitstream, $SideInfoOffset, 9);
		//            $SideInfoOffset += 9;
		//            $SideInfoOffset += 5;
		//        } else {
		//            // MPEG-1 (stereo, joint-stereo, dual-channel)
		//            $thisfile_mpeg_audio['side_info']['main_data_begin'] = substr($SideInfoBitstream, $SideInfoOffset, 9);
		//            $SideInfoOffset += 9;
		//            $SideInfoOffset += 3;
		//        }
		//    } else { // 2 or 2.5
		//        if ($thisfile_mpeg_audio['channelmode'] == 'mono') {
		//            // MPEG-2, MPEG-2.5 (mono)
		//            $thisfile_mpeg_audio['side_info']['main_data_begin'] = substr($SideInfoBitstream, $SideInfoOffset, 8);
		//            $SideInfoOffset += 8;
		//            $SideInfoOffset += 1;
		//        } else {
		//            // MPEG-2, MPEG-2.5 (stereo, joint-stereo, dual-channel)
		//            $thisfile_mpeg_audio['side_info']['main_data_begin'] = substr($SideInfoBitstream, $SideInfoOffset, 8);
		//            $SideInfoOffset += 8;
		//            $SideInfoOffset += 2;
		//        }
		//    }
		//
		//    if ($thisfile_mpeg_audio['version'] == '1') {
		//        for ($channel = 0; $channel < $info['audio']['channels']; $channel++) {
		//            for ($scfsi_band = 0; $scfsi_band < 4; $scfsi_band++) {
		//                $thisfile_mpeg_audio['scfsi'][$channel][$scfsi_band] = substr($SideInfoBitstream, $SideInfoOffset, 1);
		//                $SideInfoOffset += 2;
		//            }
		//        }
		//    }
		//    for ($granule = 0; $granule < (($thisfile_mpeg_audio['version'] == '1') ? 2 : 1); $granule++) {
		//        for ($channel = 0; $channel < $info['audio']['channels']; $channel++) {
		//            $thisfile_mpeg_audio['part2_3_length'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 12);
		//            $SideInfoOffset += 12;
		//            $thisfile_mpeg_audio['big_values'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 9);
		//            $SideInfoOffset += 9;
		//            $thisfile_mpeg_audio['global_gain'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 8);
		//            $SideInfoOffset += 8;
		//            if ($thisfile_mpeg_audio['version'] == '1') {
		//                $thisfile_mpeg_audio['scalefac_compress'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 4);
		//                $SideInfoOffset += 4;
		//            } else {
		//                $thisfile_mpeg_audio['scalefac_compress'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 9);
		//                $SideInfoOffset += 9;
		//            }
		//            $thisfile_mpeg_audio['window_switching_flag'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1);
		//            $SideInfoOffset += 1;
		//
		//            if ($thisfile_mpeg_audio['window_switching_flag'][$granule][$channel] == '1') {
		//
		//                $thisfile_mpeg_audio['block_type'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 2);
		//                $SideInfoOffset += 2;
		//                $thisfile_mpeg_audio['mixed_block_flag'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1);
		//                $SideInfoOffset += 1;
		//
		//                for ($region = 0; $region < 2; $region++) {
		//                    $thisfile_mpeg_audio['table_select'][$granule][$channel][$region] = substr($SideInfoBitstream, $SideInfoOffset, 5);
		//                    $SideInfoOffset += 5;
		//                }
		//                $thisfile_mpeg_audio['table_select'][$granule][$channel][2] = 0;
		//
		//                for ($window = 0; $window < 3; $window++) {
		//                    $thisfile_mpeg_audio['subblock_gain'][$granule][$channel][$window] = substr($SideInfoBitstream, $SideInfoOffset, 3);
		//                    $SideInfoOffset += 3;
		//                }
		//
		//            } else {
		//
		//                for ($region = 0; $region < 3; $region++) {
		//                    $thisfile_mpeg_audio['table_select'][$granule][$channel][$region] = substr($SideInfoBitstream, $SideInfoOffset, 5);
		//                    $SideInfoOffset += 5;
		//                }
		//
		//                $thisfile_mpeg_audio['region0_count'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 4);
		//                $SideInfoOffset += 4;
		//                $thisfile_mpeg_audio['region1_count'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 3);
		//                $SideInfoOffset += 3;
		//                $thisfile_mpeg_audio['block_type'][$granule][$channel] = 0;
		//            }
		//
		//            if ($thisfile_mpeg_audio['version'] == '1') {
		//                $thisfile_mpeg_audio['preflag'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1);
		//                $SideInfoOffset += 1;
		//            }
		//            $thisfile_mpeg_audio['scalefac_scale'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1);
		//            $SideInfoOffset += 1;
		//            $thisfile_mpeg_audio['count1table_select'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1);
		//            $SideInfoOffset += 1;
		//        }
		//    }
		//}

return true;
	}

/**
	 * @param int $offset
	 * @param int $nextframetestoffset
	 * @param bool $ScanAsCBR
	 *
	 * @return bool
	 */
	public function RecursiveFrameScanning(&$offset, &$nextframetestoffset, $ScanAsCBR) {
		$info = &$this->getid3->info;
		$firstframetestarray = array('error' => array(), 'warning'=> array(), 'avdataend' => $info['avdataend'], 'avdataoffset' => $info['avdataoffset']);
		$this->decodeMPEGaudioHeader($offset, $firstframetestarray, false);

$info['mp3_validity_check_bitrates'] = array();
		for ($i = 0; $i < $this->mp3_valid_check_frames; $i++) {
			// check next (default: 50) frames for validity, to make sure we haven't run across a false synch
			if (($nextframetestoffset + 4) >= $info['avdataend']) {
				// end of file
				return true;
			}

$nextframetestarray = array('error' => array(), 'warning' => array(), 'avdataend' => $info['avdataend'], 'avdataoffset'=>$info['avdataoffset']);
			if ($this->decodeMPEGaudioHeader($nextframetestoffset, $nextframetestarray, false)) {
				getid3_lib::safe_inc($info['mp3_validity_check_bitrates'][$nextframetestarray['mpeg']['audio']['bitrate']]);
				if ($ScanAsCBR) {
					// force CBR mode, used for trying to pick out invalid audio streams with valid(?) VBR headers, or VBR streams with no VBR header
					if (!isset($nextframetestarray['mpeg']['audio']['bitrate']) || !isset($firstframetestarray['mpeg']['audio']['bitrate']) || ($nextframetestarray['mpeg']['audio']['bitrate'] != $firstframetestarray['mpeg']['audio']['bitrate'])) {
						return false;
					}
				}

// next frame is OK, get ready to check the one after that
				if (isset($nextframetestarray['mpeg']['audio']['framelength']) && ($nextframetestarray['mpeg']['audio']['framelength'] > 0)) {
					$nextframetestoffset += (int) $nextframetestarray['mpeg']['audio']['framelength'];
				} else {
					$this->error('Frame at offset ('.$offset.') is has an invalid frame length.');
					return false;
				}

} elseif (!empty($firstframetestarray['mpeg']['audio']['framelength']) && (($nextframetestoffset + $firstframetestarray['mpeg']['audio']['framelength']) > $info['avdataend'])) {

// it's not the end of the file, but there's not enough data left for another frame, so assume it's garbage/padding and return OK
				return true;

} else {

// next frame is not valid, note the error and fail, so scanning can contiue for a valid frame sequence
				$this->warning('Frame at offset ('.$offset.') is valid, but the next one at ('.$nextframetestoffset.') is not.');

return false;
			}
		}
		return true;
	}

/**
	 * @param int  $offset
	 * @param bool $deepscan
	 *
	 * @return int|false
	 */
	public function FreeFormatFrameLength($offset, $deepscan=false) {
		$info = &$this->getid3->info;

$this->fseek($offset);
		$MPEGaudioData = $this->fread(32768);

$SyncPattern1 = substr($MPEGaudioData, 0, 4);
		// may be different pattern due to padding
		$SyncPattern2 = $SyncPattern1[0].$SyncPattern1[1].chr(ord($SyncPattern1[2]) | 0x02).$SyncPattern1[3];
		if ($SyncPattern2 === $SyncPattern1) {
			$SyncPattern2 = $SyncPattern1[0].$SyncPattern1[1].chr(ord($SyncPattern1[2]) & 0xFD).$SyncPattern1[3];
		}

$framelength = false;
		$framelength1 = strpos($MPEGaudioData, $SyncPattern1, 4);
		$framelength2 = strpos($MPEGaudioData, $SyncPattern2, 4);
		if ($framelength1 > 4) {
			$framelength = $framelength1;
		}
		if (($framelength2 > 4) && ($framelength2 < $framelength1)) {
			$framelength = $framelength2;
		}
		if (!$framelength) {

// LAME 3.88 has a different value for modeextension on the first frame vs the rest
			$framelength1 = strpos($MPEGaudioData, substr($SyncPattern1, 0, 3), 4);
			$framelength2 = strpos($MPEGaudioData, substr($SyncPattern2, 0, 3), 4);

if ($framelength1 > 4) {
				$framelength = $framelength1;
			}
			if (($framelength2 > 4) && ($framelength2 < $framelength1)) {
				$framelength = $framelength2;
			}
			if (!$framelength) {
				$this->error('Cannot find next free-format synch pattern ('.getid3_lib::PrintHexBytes($SyncPattern1).' or '.getid3_lib::PrintHexBytes($SyncPattern2).') after offset '.$offset);
				return false;
			} else {
				$this->warning('ModeExtension varies between first frame and other frames (known free-format issue in LAME 3.88)');
				$info['audio']['codec']   = 'LAME';
				$info['audio']['encoder'] = 'LAME3.88';
				$SyncPattern1 = substr($SyncPattern1, 0, 3);
				$SyncPattern2 = substr($SyncPattern2, 0, 3);
			}
		}

if ($deepscan) {

$ActualFrameLengthValues = array();
			$nextoffset = $offset + $framelength;
			while ($nextoffset < ($info['avdataend'] - 6)) {
				$this->fseek($nextoffset - 1);
				$NextSyncPattern = $this->fread(6);
				if ((substr($NextSyncPattern, 1, strlen($SyncPattern1)) == $SyncPattern1) || (substr($NextSyncPattern, 1, strlen($SyncPattern2)) == $SyncPattern2)) {
					// good - found where expected
					$ActualFrameLengthValues[] = $framelength;
				} elseif ((substr($NextSyncPattern, 0, strlen($SyncPattern1)) == $SyncPattern1) || (substr($NextSyncPattern, 0, strlen($SyncPattern2)) == $SyncPattern2)) {
					// ok - found one byte earlier than expected (last frame wasn't padded, first frame was)
					$ActualFrameLengthValues[] = ($framelength - 1);
					$nextoffset--;
				} elseif ((substr($NextSyncPattern, 2, strlen($SyncPattern1)) == $SyncPattern1) || (substr($NextSyncPattern, 2, strlen($SyncPattern2)) == $SyncPattern2)) {
					// ok - found one byte later than expected (last frame was padded, first frame wasn't)
					$ActualFrameLengthValues[] = ($framelength + 1);
					$nextoffset++;
				} else {
					$this->error('Did not find expected free-format sync pattern at offset '.$nextoffset);
					return false;
				}
				$nextoffset += $framelength;
			}
			if (count($ActualFrameLengthValues) > 0) {
				$framelength = intval(round(array_sum($ActualFrameLengthValues) / count($ActualFrameLengthValues)));
			}
		}
		return $framelength;
	}

/**
	 * @return bool
	 */
	public function getOnlyMPEGaudioInfoBruteForce() {
		$MPEGaudioHeaderDecodeCache   = array();
		$MPEGaudioHeaderValidCache    = array();
		$MPEGaudioHeaderLengthCache   = array();
		$MPEGaudioVersionLookup       = self::MPEGaudioVersionArray();
		$MPEGaudioLayerLookup         = self::MPEGaudioLayerArray();
		$MPEGaudioBitrateLookup       = self::MPEGaudioBitrateArray();
		$MPEGaudioFrequencyLookup     = self::MPEGaudioFrequencyArray();
		$MPEGaudioChannelModeLookup   = self::MPEGaudioChannelModeArray();
		$MPEGaudioModeExtensionLookup = self::MPEGaudioModeExtensionArray();
		$MPEGaudioEmphasisLookup      = self::MPEGaudioEmphasisArray();
		$LongMPEGversionLookup        = array();
		$LongMPEGlayerLookup          = array();
		$LongMPEGbitrateLookup        = array();
		$LongMPEGpaddingLookup        = array();
		$LongMPEGfrequencyLookup      = array();
		$Distribution                 = array();
		$Distribution['bitrate']      = array();
		$Distribution['frequency']    = array();
		$Distribution['layer']        = array();
		$Distribution['version']      = array();
		$Distribution['padding']      = array();

$info = &$this->getid3->info;
		$this->fseek($info['avdataoffset']);

$max_frames_scan = 5000;
		$frames_scanned  = 0;

$previousvalidframe = $info['avdataoffset'];
		while ($this->ftell() < $info['avdataend']) {
			set_time_limit(30);
			$head4 = $this->fread(4);
			if (strlen($head4) < 4) {
				break;
			}
			if ($head4[0] != "\xFF") {
				for ($i = 1; $i < 4; $i++) {
					if ($head4[$i] == "\xFF") {
						$this->fseek($i - 4, SEEK_CUR);
						continue 2;
					}
				}
				continue;
			}
			if (!isset($MPEGaudioHeaderDecodeCache[$head4])) {
				$MPEGaudioHeaderDecodeCache[$head4] = self::MPEGaudioHeaderDecode($head4);
			}
			if (!isset($MPEGaudioHeaderValidCache[$head4])) {
				$MPEGaudioHeaderValidCache[$head4] = self::MPEGaudioHeaderValid($MPEGaudioHeaderDecodeCache[$head4], false, false);
			}
			if ($MPEGaudioHeaderValidCache[$head4]) {

if (!isset($MPEGaudioHeaderLengthCache[$head4])) {
					$LongMPEGversionLookup[$head4]   = $MPEGaudioVersionLookup[$MPEGaudioHeaderDecodeCache[$head4]['version']];
					$LongMPEGlayerLookup[$head4]     = $MPEGaudioLayerLookup[$MPEGaudioHeaderDecodeCache[$head4]['layer']];
					$LongMPEGbitrateLookup[$head4]   = $MPEGaudioBitrateLookup[$LongMPEGversionLookup[$head4]][$LongMPEGlayerLookup[$head4]][$MPEGaudioHeaderDecodeCache[$head4]['bitrate']];
					$LongMPEGpaddingLookup[$head4]   = (bool) $MPEGaudioHeaderDecodeCache[$head4]['padding'];
					$LongMPEGfrequencyLookup[$head4] = $MPEGaudioFrequencyLookup[$LongMPEGversionLookup[$head4]][$MPEGaudioHeaderDecodeCache[$head4]['sample_rate']];
					$MPEGaudioHeaderLengthCache[$head4] = self::MPEGaudioFrameLength(
						$LongMPEGbitrateLookup[$head4],
						$LongMPEGversionLookup[$head4],
						$LongMPEGlayerLookup[$head4],
						$LongMPEGpaddingLookup[$head4],
						$LongMPEGfrequencyLookup[$head4]);
				}
				if ($MPEGaudioHeaderLengthCache[$head4] > 4) {
					$WhereWeWere = $this->ftell();
					$this->fseek($MPEGaudioHeaderLengthCache[$head4] - 4, SEEK_CUR);
					$next4 = $this->fread(4);
					if ($next4[0] == "\xFF") {
						if (!isset($MPEGaudioHeaderDecodeCache[$next4])) {
							$MPEGaudioHeaderDecodeCache[$next4] = self::MPEGaudioHeaderDecode($next4);
						}
						if (!isset($MPEGaudioHeaderValidCache[$next4])) {
							$MPEGaudioHeaderValidCache[$next4] = self::MPEGaudioHeaderValid($MPEGaudioHeaderDecodeCache[$next4], false, false);
						}
						if ($MPEGaudioHeaderValidCache[$next4]) {
							$this->fseek(-4, SEEK_CUR);

$Distribution['bitrate'][$LongMPEGbitrateLookup[$head4]] = isset($Distribution['bitrate'][$LongMPEGbitrateLookup[$head4]]) ? ++$Distribution['bitrate'][$LongMPEGbitrateLookup[$head4]] : 1;
							$Distribution['layer'][$LongMPEGlayerLookup[$head4]] = isset($Distribution['layer'][$LongMPEGlayerLookup[$head4]]) ? ++$Distribution['layer'][$LongMPEGlayerLookup[$head4]] : 1;
							$Distribution['version'][$LongMPEGversionLookup[$head4]] = isset($Distribution['version'][$LongMPEGversionLookup[$head4]]) ? ++$Distribution['version'][$LongMPEGversionLookup[$head4]] : 1;
							$Distribution['padding'][intval($LongMPEGpaddingLookup[$head4])] = isset($Distribution['padding'][intval($LongMPEGpaddingLookup[$head4])]) ? ++$Distribution['padding'][intval($LongMPEGpaddingLookup[$head4])] : 1;
							$Distribution['frequency'][$LongMPEGfrequencyLookup[$head4]] = isset($Distribution['frequency'][$LongMPEGfrequencyLookup[$head4]]) ? ++$Distribution['frequency'][$LongMPEGfrequencyLookup[$head4]] : 1;
							if (++$frames_scanned >= $max_frames_scan) {
								$pct_data_scanned = getid3_lib::SafeDiv($this->ftell() - $info['avdataoffset'], $info['avdataend'] - $info['avdataoffset']);
								$this->warning('too many MPEG audio frames to scan, only scanned first '.$max_frames_scan.' frames ('.number_format($pct_data_scanned * 100, 1).'% of file) and extrapolated distribution, playtime and bitrate may be incorrect.');
								foreach ($Distribution as $key1 => $value1) {
									foreach ($value1 as $key2 => $value2) {
										$Distribution[$key1][$key2] = $pct_data_scanned ? round($value2 / $pct_data_scanned) : 1;
									}
								}
								break;
							}
							continue;
						}
					}
					unset($next4);
					$this->fseek($WhereWeWere - 3);
				}

}
		}
		foreach ($Distribution as $key => $value) {
			ksort($Distribution[$key], SORT_NUMERIC);
		}
		ksort($Distribution['version'], SORT_STRING);
		$info['mpeg']['audio']['bitrate_distribution']   = $Distribution['bitrate'];
		$info['mpeg']['audio']['frequency_distribution'] = $Distribution['frequency'];
		$info['mpeg']['audio']['layer_distribution']     = $Distribution['layer'];
		$info['mpeg']['audio']['version_distribution']   = $Distribution['version'];
		$info['mpeg']['audio']['padding_distribution']   = $Distribution['padding'];
		if (count($Distribution['version']) > 1) {
			$this->error('Corrupt file - more than one MPEG version detected');
		}
		if (count($Distribution['layer']) > 1) {
			$this->error('Corrupt file - more than one MPEG layer detected');
		}
		if (count($Distribution['frequency']) > 1) {
			$this->error('Corrupt file - more than one MPEG sample rate detected');
		}

$bittotal = 0;
		foreach ($Distribution['bitrate'] as $bitratevalue => $bitratecount) {
			if ($bitratevalue != 'free') {
				$bittotal += ($bitratevalue * $bitratecount);
			}
		}
		$info['mpeg']['audio']['frame_count']  = array_sum($Distribution['bitrate']);
		if ($info['mpeg']['audio']['frame_count'] == 0) {
			$this->error('no MPEG audio frames found');
			return false;
		}
		$info['mpeg']['audio']['bitrate']      = ($bittotal / $info['mpeg']['audio']['frame_count']);
		$info['mpeg']['audio']['bitrate_mode'] = ((count($Distribution['bitrate']) > 0) ? 'vbr' : 'cbr');
		$info['mpeg']['audio']['sample_rate']  = getid3_lib::array_max($Distribution['frequency'], true);

$info['audio']['bitrate']      = $info['mpeg']['audio']['bitrate'];
		$info['audio']['bitrate_mode'] = $info['mpeg']['audio']['bitrate_mode'];
		$info['audio']['sample_rate']  = $info['mpeg']['audio']['sample_rate'];
		$info['audio']['dataformat']   = 'mp'.getid3_lib::array_max($Distribution['layer'], true);
		$info['fileformat']            = $info['audio']['dataformat'];

return true;
	}

/**
	 * @param int  $avdataoffset
	 * @param bool $BitrateHistogram
	 *
	 * @return bool
	 */
	public function getOnlyMPEGaudioInfo($avdataoffset, $BitrateHistogram=false) {
		// looks for synch, decodes MPEG audio header

$info = &$this->getid3->info;

static $MPEGaudioVersionLookup;
		static $MPEGaudioLayerLookup;
		static $MPEGaudioBitrateLookup;
		if (empty($MPEGaudioVersionLookup)) {
			$MPEGaudioVersionLookup = self::MPEGaudioVersionArray();
			$MPEGaudioLayerLookup   = self::MPEGaudioLayerArray();
			$MPEGaudioBitrateLookup = self::MPEGaudioBitrateArray();
		}

$this->fseek($avdataoffset);
		$sync_seek_buffer_size = min(128 * 1024, $info['avdataend'] - $avdataoffset);
		if ($sync_seek_buffer_size <= 0) {
			$this->error('Invalid $sync_seek_buffer_size at offset '.$avdataoffset);
			return false;
		}
		$header = $this->fread($sync_seek_buffer_size);
		$sync_seek_buffer_size = strlen($header);
		$SynchSeekOffset = 0;
		$SyncSeekAttempts = 0;
		$SyncSeekAttemptsMax = 1000;
		$FirstFrameThisfileInfo = null;
		while ($SynchSeekOffset < $sync_seek_buffer_size) {
			if ((($avdataoffset + $SynchSeekOffset)  < $info['avdataend']) && !$this->feof()) {

if ($SynchSeekOffset > $sync_seek_buffer_size) {
					// if a synch's not found within the first 128k bytes, then give up
					$this->error('Could not find valid MPEG audio synch within the first '.round($sync_seek_buffer_size / 1024).'kB');
					if (isset($info['audio']['bitrate'])) {
						unset($info['audio']['bitrate']);
					}
					if (isset($info['mpeg']['audio'])) {
						unset($info['mpeg']['audio']);
					}
					if (empty($info['mpeg'])) {
						unset($info['mpeg']);
					}
					return false;
				}
			}

if (($SynchSeekOffset + 1) >= strlen($header)) {
				$this->error('Could not find valid MPEG synch before end of file');
				return false;
			}

if (($header[$SynchSeekOffset] == "\xFF") && ($header[($SynchSeekOffset + 1)] > "\xE0")) { // possible synch detected
				if (++$SyncSeekAttempts >= $SyncSeekAttemptsMax) {
					// https://github.com/JamesHeinrich/getID3/issues/286
					// corrupt files claiming to be MP3, with a large number of 0xFF bytes near the beginning, can cause this loop to take a very long time
					// should have escape condition to avoid spending too much time scanning a corrupt file
					// if a synch's not found within the first 128k bytes, then give up
					$this->error('Could not find valid MPEG audio synch after scanning '.$SyncSeekAttempts.' candidate offsets');
					if (isset($info['audio']['bitrate'])) {
						unset($info['audio']['bitrate']);
					}
					if (isset($info['mpeg']['audio'])) {
						unset($info['mpeg']['audio']);
					}
					if (empty($info['mpeg'])) {
						unset($info['mpeg']);
					}
					return false;
				}
				$FirstFrameAVDataOffset = null;
				if (!isset($FirstFrameThisfileInfo) && !isset($info['mpeg']['audio'])) {
					$FirstFrameThisfileInfo = $info;
					$FirstFrameAVDataOffset = $avdataoffset + $SynchSeekOffset;
					if (!$this->decodeMPEGaudioHeader($FirstFrameAVDataOffset, $FirstFrameThisfileInfo, false)) {
						// if this is the first valid MPEG-audio frame, save it in case it's a VBR header frame and there's
						// garbage between this frame and a valid sequence of MPEG-audio frames, to be restored below
						unset($FirstFrameThisfileInfo);
					}
				}

$dummy = $info; // only overwrite real data if valid header found
				if ($this->decodeMPEGaudioHeader($avdataoffset + $SynchSeekOffset, $dummy, true)) {
					$info = $dummy;
					$info['avdataoffset'] = $avdataoffset + $SynchSeekOffset;
					switch (isset($info['fileformat']) ? $info['fileformat'] : '') {
						case '':
						case 'id3':
						case 'ape':
						case 'mp3':
							$info['fileformat']          = 'mp3';
							$info['audio']['dataformat'] = 'mp3';
							break;
					}
					if (isset($FirstFrameThisfileInfo) && isset($FirstFrameThisfileInfo['mpeg']['audio']['bitrate_mode']) && ($FirstFrameThisfileInfo['mpeg']['audio']['bitrate_mode'] == 'vbr')) {
						if (!(abs($info['audio']['bitrate'] - $FirstFrameThisfileInfo['audio']['bitrate']) <= 1)) {
							// If there is garbage data between a valid VBR header frame and a sequence
							// of valid MPEG-audio frames the VBR data is no longer discarded.
							$info = $FirstFrameThisfileInfo;
							$info['avdataoffset']        = $FirstFrameAVDataOffset;
							$info['fileformat']          = 'mp3';
							$info['audio']['dataformat'] = 'mp3';
							$dummy                       = $info;
							unset($dummy['mpeg']['audio']);
							$GarbageOffsetStart = $FirstFrameAVDataOffset + $FirstFrameThisfileInfo['mpeg']['audio']['framelength'];
							$GarbageOffsetEnd   = $avdataoffset + $SynchSeekOffset;
							if ($this->decodeMPEGaudioHeader($GarbageOffsetEnd, $dummy, true, true)) {
								$info = $dummy;
								$info['avdataoffset'] = $GarbageOffsetEnd;
								$this->warning('apparently-valid VBR header not used because could not find '.$this->mp3_valid_check_frames.' consecutive MPEG-audio frames immediately after VBR header (garbage data for '.($GarbageOffsetEnd - $GarbageOffsetStart).' bytes between '.$GarbageOffsetStart.' and '.$GarbageOffsetEnd.'), but did find valid CBR stream starting at '.$GarbageOffsetEnd);
							} else {
								$this->warning('using data from VBR header even though could not find '.$this->mp3_valid_check_frames.' consecutive MPEG-audio frames immediately after VBR header (garbage data for '.($GarbageOffsetEnd - $GarbageOffsetStart).' bytes between '.$GarbageOffsetStart.' and '.$GarbageOffsetEnd.')');
							}
						}
					}
					if (isset($info['mpeg']['audio']['bitrate_mode']) && ($info['mpeg']['audio']['bitrate_mode'] == 'vbr') && !isset($info['mpeg']['audio']['VBR_method'])) {
						// VBR file with no VBR header
						$BitrateHistogram = true;
					}

if ($BitrateHistogram) {

$info['mpeg']['audio']['stereo_distribution']  = array('stereo'=>0, 'joint stereo'=>0, 'dual channel'=>0, 'mono'=>0);
						$info['mpeg']['audio']['version_distribution'] = array('1'=>0, '2'=>0, '2.5'=>0);

if ($info['mpeg']['audio']['version'] == '1') {
							if ($info['mpeg']['audio']['layer'] == 3) {
								$info['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 32000=>0, 40000=>0, 48000=>0, 56000=>0, 64000=>0, 80000=>0, 96000=>0, 112000=>0, 128000=>0, 160000=>0, 192000=>0, 224000=>0, 256000=>0, 320000=>0);
							} elseif ($info['mpeg']['audio']['layer'] == 2) {
								$info['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 32000=>0, 48000=>0, 56000=>0, 64000=>0, 80000=>0, 96000=>0, 112000=>0, 128000=>0, 160000=>0, 192000=>0, 224000=>0, 256000=>0, 320000=>0, 384000=>0);
							} elseif ($info['mpeg']['audio']['layer'] == 1) {
								$info['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 32000=>0, 64000=>0, 96000=>0, 128000=>0, 160000=>0, 192000=>0, 224000=>0, 256000=>0, 288000=>0, 320000=>0, 352000=>0, 384000=>0, 416000=>0, 448000=>0);
							}
						} elseif ($info['mpeg']['audio']['layer'] == 1) {
							$info['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 32000=>0, 48000=>0, 56000=>0, 64000=>0, 80000=>0, 96000=>0, 112000=>0, 128000=>0, 144000=>0, 160000=>0, 176000=>0, 192000=>0, 224000=>0, 256000=>0);
						} else {
							$info['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 8000=>0, 16000=>0, 24000=>0, 32000=>0, 40000=>0, 48000=>0, 56000=>0, 64000=>0, 80000=>0, 96000=>0, 112000=>0, 128000=>0, 144000=>0, 160000=>0);
						}

$dummy = array('error'=>$info['error'], 'warning'=>$info['warning'], 'avdataend'=>$info['avdataend'], 'avdataoffset'=>$info['avdataoffset']);
						$synchstartoffset = $info['avdataoffset'];
						$this->fseek($info['avdataoffset']);

// you can play with these numbers:
						$max_frames_scan  = 50000;
						$max_scan_segments = 10;

// don't play with these numbers:
						$FastMode = false;
						$SynchErrorsFound = 0;
						$frames_scanned   = 0;
						$this_scan_segment = 0;
						$frames_scan_per_segment = ceil($max_frames_scan / $max_scan_segments);
						$pct_data_scanned = 0;
						for ($current_segment = 0; $current_segment < $max_scan_segments; $current_segment++) {
							$frames_scanned_this_segment = 0;
							$scan_start_offset = array();
							if ($this->ftell() >= $info['avdataend']) {
								break;
							}
							$scan_start_offset[$current_segment] = max($this->ftell(), $info['avdataoffset'] + round($current_segment * (($info['avdataend'] - $info['avdataoffset']) / $max_scan_segments)));
							if ($current_segment > 0) {
								$this->fseek($scan_start_offset[$current_segment]);
								$buffer_4k = $this->fread(4096);
								for ($j = 0; $j < (strlen($buffer_4k) - 4); $j++) {
									if (($buffer_4k[$j] == "\xFF") && ($buffer_4k[($j + 1)] > "\xE0")) { // synch detected
										if ($this->decodeMPEGaudioHeader($scan_start_offset[$current_segment] + $j, $dummy, false, false, $FastMode)) {
											$calculated_next_offset = $scan_start_offset[$current_segment] + $j + $dummy['mpeg']['audio']['framelength'];
											if ($this->decodeMPEGaudioHeader($calculated_next_offset, $dummy, false, false, $FastMode)) {
												$scan_start_offset[$current_segment] += $j;
												break;
											}
										}
									}
								}
							}
							$synchstartoffset = $scan_start_offset[$current_segment];
							while (($synchstartoffset < $info['avdataend']) && $this->decodeMPEGaudioHeader($synchstartoffset, $dummy, false, false, $FastMode)) {
								$FastMode = true;
								$thisframebitrate = $MPEGaudioBitrateLookup[$MPEGaudioVersionLookup[$dummy['mpeg']['audio']['raw']['version']]][$MPEGaudioLayerLookup[$dummy['mpeg']['audio']['raw']['layer']]][$dummy['mpeg']['audio']['raw']['bitrate']];

if (empty($dummy['mpeg']['audio']['framelength'])) {
									$SynchErrorsFound++;
									$synchstartoffset++;
								} else {
									getid3_lib::safe_inc($info['mpeg']['audio']['bitrate_distribution'][$thisframebitrate]);
									getid3_lib::safe_inc($info['mpeg']['audio']['stereo_distribution'][$dummy['mpeg']['audio']['channelmode']]);
									getid3_lib::safe_inc($info['mpeg']['audio']['version_distribution'][$dummy['mpeg']['audio']['version']]);
									$synchstartoffset += $dummy['mpeg']['audio']['framelength'];
								}
								$frames_scanned++;
								if ($frames_scan_per_segment && (++$frames_scanned_this_segment >= $frames_scan_per_segment)) {
									$this_pct_scanned = getid3_lib::SafeDiv($this->ftell() - $scan_start_offset[$current_segment], $info['avdataend'] - $info['avdataoffset']);
									if (($current_segment == 0) && (($this_pct_scanned * $max_scan_segments) >= 1)) {
										// file likely contains < $max_frames_scan, just scan as one segment
										$max_scan_segments = 1;
										$frames_scan_per_segment = $max_frames_scan;
									} else {
										$pct_data_scanned += $this_pct_scanned;
										break;
									}
								}
							}
						}
						if ($pct_data_scanned > 0) {
							$this->warning('too many MPEG audio frames to scan, only scanned '.$frames_scanned.' frames in '.$max_scan_segments.' segments ('.number_format($pct_data_scanned * 100, 1).'% of file) and extrapolated distribution, playtime and bitrate may be incorrect.');
							foreach ($info['mpeg']['audio'] as $key1 => $value1) {
								if (!preg_match('#_distribution$#i', $key1)) {
									continue;
								}
								foreach ($value1 as $key2 => $value2) {
									$info['mpeg']['audio'][$key1][$key2] = round($value2 / $pct_data_scanned);
								}
							}
						}

if ($SynchErrorsFound > 0) {
							$this->warning('Found '.$SynchErrorsFound.' synch errors in histogram analysis');
							//return false;
						}

$bittotal     = 0;
						$framecounter = 0;
						foreach ($info['mpeg']['audio']['bitrate_distribution'] as $bitratevalue => $bitratecount) {
							$framecounter += $bitratecount;
							if ($bitratevalue != 'free') {
								$bittotal += ($bitratevalue * $bitratecount);
							}
						}
						if ($framecounter == 0) {
							$this->error('Corrupt MP3 file: framecounter == zero');
							return false;
						}
						$info['mpeg']['audio']['frame_count'] = getid3_lib::CastAsInt($framecounter);
						$info['mpeg']['audio']['bitrate']     = ($bittotal / $framecounter);

$info['audio']['bitrate'] = $info['mpeg']['audio']['bitrate'];

// Definitively set VBR vs CBR, even if the Xing/LAME/VBRI header says differently
						$distinct_bitrates = 0;
						foreach ($info['mpeg']['audio']['bitrate_distribution'] as $bitrate_value => $bitrate_count) {
							if ($bitrate_count > 0) {
								$distinct_bitrates++;
							}
						}
						if ($distinct_bitrates > 1) {
							$info['mpeg']['audio']['bitrate_mode'] = 'vbr';
						} else {
							$info['mpeg']['audio']['bitrate_mode'] = 'cbr';
						}
						$info['audio']['bitrate_mode'] = $info['mpeg']['audio']['bitrate_mode'];

}

break; // exit while()
				}
			}

$SynchSeekOffset++;
			if (($avdataoffset + $SynchSeekOffset) >= $info['avdataend']) {
				// end of file/data

if (empty($info['mpeg']['audio'])) {

$this->error('could not find valid MPEG synch before end of file');
					if (isset($info['audio']['bitrate'])) {
						unset($info['audio']['bitrate']);
					}
					if (isset($info['mpeg']['audio'])) {
						unset($info['mpeg']['audio']);
					}
					if (isset($info['mpeg']) && (!is_array($info['mpeg']) || empty($info['mpeg']))) {
						unset($info['mpeg']);
					}
					return false;

}
				break;
			}

}
		$info['audio']['channels']        = $info['mpeg']['audio']['channels'];
		if ($info['audio']['channels'] < 1) {
			$this->error('Corrupt MP3 file: no channels');
			return false;
		}
		$info['audio']['channelmode']     = $info['mpeg']['audio']['channelmode'];
		$info['audio']['sample_rate']     = $info['mpeg']['audio']['sample_rate'];
		return true;
	}

/**
	 * @return array
	 */
	public static function MPEGaudioVersionArray() {
		static $MPEGaudioVersion = array('2.5', false, '2', '1');
		return $MPEGaudioVersion;
	}

/**
	 * @return array
	 */
	public static function MPEGaudioLayerArray() {
		static $MPEGaudioLayer = array(false, 3, 2, 1);
		return $MPEGaudioLayer;
	}

/**
	 * @return array
	 */
	public static function MPEGaudioBitrateArray() {
		static $MPEGaudioBitrate;
		if (empty($MPEGaudioBitrate)) {
			$MPEGaudioBitrate = array (
				'1' => array(
					1 => array('free', 32000, 64000, 96000, 128000, 160000, 192000, 224000, 256000, 288000, 320000, 352000, 384000, 416000, 448000),
					2 => array('free', 32000, 48000, 56000,  64000,  80000,  96000, 112000, 128000, 160000, 192000, 224000, 256000, 320000, 384000),
					3 => array('free', 32000, 40000, 48000,  56000,  64000,  80000,  96000, 112000, 128000, 160000, 192000, 224000, 256000, 320000)
				),
				'2' => array(
					1 => array('free', 32000, 48000, 56000,  64000,  80000,  96000, 112000, 128000, 144000, 160000, 176000, 192000, 224000, 256000),
					2 => array('free',  8000, 16000, 24000,  32000,  40000,  48000,  56000,  64000,  80000,  96000, 112000, 128000, 144000, 160000),
				),
			);
			$MPEGaudioBitrate['2'][3] = $MPEGaudioBitrate['2'][2];
			$MPEGaudioBitrate['2.5']  = $MPEGaudioBitrate['2'];
		}
		return $MPEGaudioBitrate;
	}

/**
	 * @return array
	 */
	public static function MPEGaudioFrequencyArray() {
		static $MPEGaudioFrequency;
		if (empty($MPEGaudioFrequency)) {
			$MPEGaudioFrequency = array (
				'1'   => array(44100, 48000, 32000),
				'2'   => array(22050, 24000, 16000),
				'2.5' => array(11025, 12000,  8000)
			);
		}
		return $MPEGaudioFrequency;
	}

/**
	 * @return array
	 */
	public static function MPEGaudioChannelModeArray() {
		static $MPEGaudioChannelMode = array('stereo', 'joint stereo', 'dual channel', 'mono');
		return $MPEGaudioChannelMode;
	}

/**
	 * @return array
	 */
	public static function MPEGaudioModeExtensionArray() {
		static $MPEGaudioModeExtension;
		if (empty($MPEGaudioModeExtension)) {
			$MPEGaudioModeExtension = array (
				1 => array('4-31', '8-31', '12-31', '16-31'),
				2 => array('4-31', '8-31', '12-31', '16-31'),
				3 => array('', 'IS', 'MS', 'IS+MS')
			);
		}
		return $MPEGaudioModeExtension;
	}

/**
	 * @return array
	 */
	public static function MPEGaudioEmphasisArray() {
		static $MPEGaudioEmphasis = array('none', '50/15ms', false, 'CCIT J.17');
		return $MPEGaudioEmphasis;
	}

/**
	 * @param string $head4
	 * @param bool   $allowBitrate15
	 *
	 * @return bool
	 */
	public static function MPEGaudioHeaderBytesValid($head4, $allowBitrate15=false) {
		return self::MPEGaudioHeaderValid(self::MPEGaudioHeaderDecode($head4), false, $allowBitrate15);
	}

/**
	 * @param array $rawarray
	 * @param bool  $echoerrors
	 * @param bool  $allowBitrate15
	 *
	 * @return bool
	 */
	public static function MPEGaudioHeaderValid($rawarray, $echoerrors=false, $allowBitrate15=false) {
		if (!isset($rawarray['synch']) || ($rawarray['synch'] & 0x0FFE) != 0x0FFE) {
			return false;
		}

static $MPEGaudioVersionLookup;
		static $MPEGaudioLayerLookup;
		static $MPEGaudioBitrateLookup;
		static $MPEGaudioFrequencyLookup;
		static $MPEGaudioChannelModeLookup;
		static $MPEGaudioModeExtensionLookup;
		static $MPEGaudioEmphasisLookup;
		if (empty($MPEGaudioVersionLookup)) {
			$MPEGaudioVersionLookup       = self::MPEGaudioVersionArray();
			$MPEGaudioLayerLookup         = self::MPEGaudioLayerArray();
			$MPEGaudioBitrateLookup       = self::MPEGaudioBitrateArray();
			$MPEGaudioFrequencyLookup     = self::MPEGaudioFrequencyArray();
			$MPEGaudioChannelModeLookup   = self::MPEGaudioChannelModeArray();
			$MPEGaudioModeExtensionLookup = self::MPEGaudioModeExtensionArray();
			$MPEGaudioEmphasisLookup      = self::MPEGaudioEmphasisArray();
		}

if (isset($MPEGaudioVersionLookup[$rawarray['version']])) {
			$decodedVersion = $MPEGaudioVersionLookup[$rawarray['version']];
		} else {
			echo ($echoerrors ? "\n".'invalid Version ('.$rawarray['version'].')' : '');
			return false;
		}
		if (isset($MPEGaudioLayerLookup[$rawarray['layer']])) {
			$decodedLayer = $MPEGaudioLayerLookup[$rawarray['layer']];
		} else {
			echo ($echoerrors ? "\n".'invalid Layer ('.$rawarray['layer'].')' : '');
			return false;
		}
		if (!isset($MPEGaudioBitrateLookup[$decodedVersion][$decodedLayer][$rawarray['bitrate']])) {
			echo ($echoerrors ? "\n".'invalid Bitrate ('.$rawarray['bitrate'].')' : '');
			if ($rawarray['bitrate'] == 15) {
				// known issue in LAME 3.90 - 3.93.1 where free-format has bitrate ID of 15 instead of 0
				// let it go through here otherwise file will not be identified
				if (!$allowBitrate15) {
					return false;
				}
			} else {
				return false;
			}
		}
		if (!isset($MPEGaudioFrequencyLookup[$decodedVersion][$rawarray['sample_rate']])) {
			echo ($echoerrors ? "\n".'invalid Frequency ('.$rawarray['sample_rate'].')' : '');
			return false;
		}
		if (!isset($MPEGaudioChannelModeLookup[$rawarray['channelmode']])) {
			echo ($echoerrors ? "\n".'invalid ChannelMode ('.$rawarray['channelmode'].')' : '');
			return false;
		}
		if (!isset($MPEGaudioModeExtensionLookup[$decodedLayer][$rawarray['modeextension']])) {
			echo ($echoerrors ? "\n".'invalid Mode Extension ('.$rawarray['modeextension'].')' : '');
			return false;
		}
		if (!isset($MPEGaudioEmphasisLookup[$rawarray['emphasis']])) {
			echo ($echoerrors ? "\n".'invalid Emphasis ('.$rawarray['emphasis'].')' : '');
			return false;
		}
		// These are just either set or not set, you can't mess that up :)
		// $rawarray['protection'];
		// $rawarray['padding'];
		// $rawarray['private'];
		// $rawarray['copyright'];
		// $rawarray['original'];

return true;
	}

/**
	 * @param string $Header4Bytes
	 *
	 * @return array|false
	 */
	public static function MPEGaudioHeaderDecode($Header4Bytes) {
		// AAAA AAAA  AAAB BCCD  EEEE FFGH  IIJJ KLMM
		// A - Frame sync (all bits set)
		// B - MPEG Audio version ID
		// C - Layer description
		// D - Protection bit
		// E - Bitrate index
		// F - Sampling rate frequency index
		// G - Padding bit
		// H - Private bit
		// I - Channel Mode
		// J - Mode extension (Only if Joint stereo)
		// K - Copyright
		// L - Original
		// M - Emphasis

if (strlen($Header4Bytes) != 4) {
			return false;
		}

$MPEGrawHeader = array();
		$MPEGrawHeader['synch']         = (getid3_lib::BigEndian2Int(substr($Header4Bytes, 0, 2)) & 0xFFE0) >> 4;
		$MPEGrawHeader['version']       = (ord($Header4Bytes[1]) & 0x18) >> 3; //    BB
		$MPEGrawHeader['layer']         = (ord($Header4Bytes[1]) & 0x06) >> 1; //      CC
		$MPEGrawHeader['protection']    = (ord($Header4Bytes[1]) & 0x01);      //        D
		$MPEGrawHeader['bitrate']       = (ord($Header4Bytes[2]) & 0xF0) >> 4; // EEEE
		$MPEGrawHeader['sample_rate']   = (ord($Header4Bytes[2]) & 0x0C) >> 2; //     FF
		$MPEGrawHeader['padding']       = (ord($Header4Bytes[2]) & 0x02) >> 1; //       G
		$MPEGrawHeader['private']       = (ord($Header4Bytes[2]) & 0x01);      //        H
		$MPEGrawHeader['channelmode']   = (ord($Header4Bytes[3]) & 0xC0) >> 6; // II
		$MPEGrawHeader['modeextension'] = (ord($Header4Bytes[3]) & 0x30) >> 4; //   JJ
		$MPEGrawHeader['copyright']     = (ord($Header4Bytes[3]) & 0x08) >> 3; //     K
		$MPEGrawHeader['original']      = (ord($Header4Bytes[3]) & 0x04) >> 2; //      L
		$MPEGrawHeader['emphasis']      = (ord($Header4Bytes[3]) & 0x03);      //       MM

return $MPEGrawHeader;
	}

/**
	 * @param int|string $bitrate
	 * @param string     $version
	 * @param string     $layer
	 * @param bool       $padding
	 * @param int        $samplerate
	 *
	 * @return int|false
	 */
	public static function MPEGaudioFrameLength(&$bitrate, &$version, &$layer, $padding, &$samplerate) {
		static $AudioFrameLengthCache = array();

if (!isset($AudioFrameLengthCache[$bitrate][$version][$layer][$padding][$samplerate])) {
			$AudioFrameLengthCache[$bitrate][$version][$layer][$padding][$samplerate] = false;
			if ($bitrate != 'free') {

if ($version == '1') {

if ($layer == '1') {

// For Layer I slot is 32 bits long
						$FrameLengthCoefficient = 48;
						$SlotLength = 4;

} else { // Layer 2 / 3

// for Layer 2 and Layer 3 slot is 8 bits long.
						$FrameLengthCoefficient = 144;
						$SlotLength = 1;

}

} else { // MPEG-2 / MPEG-2.5

if ($layer == '1') {

// For Layer I slot is 32 bits long
						$FrameLengthCoefficient = 24;
						$SlotLength = 4;

} elseif ($layer == '2') {

// for Layer 2 and Layer 3 slot is 8 bits long.
						$FrameLengthCoefficient = 144;
						$SlotLength = 1;

} else { // layer 3

// for Layer 2 and Layer 3 slot is 8 bits long.
						$FrameLengthCoefficient = 72;
						$SlotLength = 1;

}

// FrameLengthInBytes = ((Coefficient * BitRate) / SampleRate) + Padding
				if ($samplerate > 0) {
					$NewFramelength  = ($FrameLengthCoefficient * $bitrate) / $samplerate;
					$NewFramelength  = floor($NewFramelength / $SlotLength) * $SlotLength; // round to next-lower multiple of SlotLength (1 byte for Layer 2/3, 4 bytes for Layer I)
					if ($padding) {
						$NewFramelength += $SlotLength;
					}
					$AudioFrameLengthCache[$bitrate][$version][$layer][$padding][$samplerate] = (int) $NewFramelength;
				}
			}
		}
		return $AudioFrameLengthCache[$bitrate][$version][$layer][$padding][$samplerate];
	}

/**
	 * @param float|int $bit_rate
	 *
	 * @return int|float|string
	 */
	public static function ClosestStandardMP3Bitrate($bit_rate) {
		static $standard_bit_rates = array (320000, 256000, 224000, 192000, 160000, 128000, 112000, 96000, 80000, 64000, 56000, 48000, 40000, 32000, 24000, 16000, 8000);
		static $bit_rate_table = array (0=>'-');
		$round_bit_rate = intval(round($bit_rate, -3));
		if (!isset($bit_rate_table[$round_bit_rate])) {
			if ($round_bit_rate > max($standard_bit_rates)) {
				$bit_rate_table[$round_bit_rate] = round($bit_rate, 2 - strlen($bit_rate));
			} else {
				$bit_rate_table[$round_bit_rate] = max($standard_bit_rates);
				foreach ($standard_bit_rates as $standard_bit_rate) {
					if ($round_bit_rate >= $standard_bit_rate + (($bit_rate_table[$round_bit_rate] - $standard_bit_rate) / 2)) {
						break;
					}
					$bit_rate_table[$round_bit_rate] = $standard_bit_rate;
				}
			}
		}
		return $bit_rate_table[$round_bit_rate];
	}

/**
	 * @param string $version
	 * @param string $channelmode
	 *
	 * @return int
	 */
	public static function XingVBRidOffset($version, $channelmode) {
		static $XingVBRidOffsetCache = array();
		if (empty($XingVBRidOffsetCache)) {
			$XingVBRidOffsetCache = array (
				'1'   => array ('mono'          => 0x15, // 4 + 17 = 21
								'stereo'        => 0x24, // 4 + 32 = 36
								'joint stereo'  => 0x24,
								'dual channel'  => 0x24
							   ),

'2'   => array ('mono'          => 0x0D, // 4 +  9 = 13
								'stereo'        => 0x15, // 4 + 17 = 21
								'joint stereo'  => 0x15,
								'dual channel'  => 0x15
							   ),

'2.5' => array ('mono'          => 0x15,
								'stereo'        => 0x15,
								'joint stereo'  => 0x15,
								'dual channel'  => 0x15
							   )
			);
		}
		return $XingVBRidOffsetCache[$version][$channelmode];
	}

/**
	 * @param int $VBRmethodID
	 *
	 * @return string
	 */
	public static function LAMEvbrMethodLookup($VBRmethodID) {
		static $LAMEvbrMethodLookup = array(
			0x00 => 'unknown',
			0x01 => 'cbr',
			0x02 => 'abr',
			0x03 => 'vbr-old / vbr-rh',
			0x04 => 'vbr-new / vbr-mtrh',
			0x05 => 'vbr-mt',
			0x06 => 'vbr (full vbr method 4)',
			0x08 => 'cbr (constant bitrate 2 pass)',
			0x09 => 'abr (2 pass)',
			0x0F => 'reserved'
		);
		return (isset($LAMEvbrMethodLookup[$VBRmethodID]) ? $LAMEvbrMethodLookup[$VBRmethodID] : '');
	}

/**
	 * @param int $StereoModeID
	 *
	 * @return string
	 */
	public static function LAMEmiscStereoModeLookup($StereoModeID) {
		static $LAMEmiscStereoModeLookup = array(
			0 => 'mono',
			1 => 'stereo',
			2 => 'dual mono',
			3 => 'joint stereo',
			4 => 'forced stereo',
			5 => 'auto',
			6 => 'intensity stereo',
			7 => 'other'
		);
		return (isset($LAMEmiscStereoModeLookup[$StereoModeID]) ? $LAMEmiscStereoModeLookup[$StereoModeID] : '');
	}

/**
	 * @param int $SourceSampleFrequencyID
	 *
	 * @return string
	 */
	public static function LAMEmiscSourceSampleFrequencyLookup($SourceSampleFrequencyID) {
		static $LAMEmiscSourceSampleFrequencyLookup = array(
			0 => '<= 32 kHz',
			1 => '44.1 kHz',
			2 => '48 kHz',
			3 => '> 48kHz'
		);
		return (isset($LAMEmiscSourceSampleFrequencyLookup[$SourceSampleFrequencyID]) ? $LAMEmiscSourceSampleFrequencyLookup[$SourceSampleFrequencyID] : '');
	}

/**
	 * @param int $SurroundInfoID
	 *
	 * @return string
	 */
	public static function LAMEsurroundInfoLookup($SurroundInfoID) {
		static $LAMEsurroundInfoLookup = array(
			0 => 'no surround info',
			1 => 'DPL encoding',
			2 => 'DPL2 encoding',
			3 => 'Ambisonic encoding'
		);
		return (isset($LAMEsurroundInfoLookup[$SurroundInfoID]) ? $LAMEsurroundInfoLookup[$SurroundInfoID] : 'reserved');
	}

/**
	 * @param array $LAMEtag
	 *
	 * @return string
	 */
	public static function LAMEpresetUsedLookup($LAMEtag) {

if ($LAMEtag['preset_used_id'] == 0) {
			// no preset used (LAME >=3.93)
			// no preset recorded (LAME <3.93)
			return '';
		}
		$LAMEpresetUsedLookup = array();

/////  THIS PART CANNOT BE STATIC .
		for ($i = 8; $i <= 320; $i++) {
			switch ($LAMEtag['vbr_method']) {
				case 'cbr':
					$LAMEpresetUsedLookup[$i] = '--alt-preset '.$LAMEtag['vbr_method'].' '.$i;
					break;
				case 'abr':
				default: // other VBR modes shouldn't be here(?)
					$LAMEpresetUsedLookup[$i] = '--alt-preset '.$i;
					break;
			}
		}

// named old-style presets (studio, phone, voice, etc) are handled in GuessEncoderOptions()

// named alt-presets
		$LAMEpresetUsedLookup[1000] = '--r3mix';
		$LAMEpresetUsedLookup[1001] = '--alt-preset standard';
		$LAMEpresetUsedLookup[1002] = '--alt-preset extreme';
		$LAMEpresetUsedLookup[1003] = '--alt-preset insane';
		$LAMEpresetUsedLookup[1004] = '--alt-preset fast standard';
		$LAMEpresetUsedLookup[1005] = '--alt-preset fast extreme';
		$LAMEpresetUsedLookup[1006] = '--alt-preset medium';
		$LAMEpresetUsedLookup[1007] = '--alt-preset fast medium';

// LAME 3.94 additions/changes
		$LAMEpresetUsedLookup[1010] = '--preset portable';                                                           // 3.94a15 Oct 21 2003
		$LAMEpresetUsedLookup[1015] = '--preset radio';                                                              // 3.94a15 Oct 21 2003

$LAMEpresetUsedLookup[320]  = '--preset insane';                                                             // 3.94a15 Nov 12 2003
		$LAMEpresetUsedLookup[410]  = '-V9';
		$LAMEpresetUsedLookup[420]  = '-V8';
		$LAMEpresetUsedLookup[440]  = '-V6';
		$LAMEpresetUsedLookup[430]  = '--preset radio';                                                              // 3.94a15 Nov 12 2003
		$LAMEpresetUsedLookup[450]  = '--preset '.(($LAMEtag['raw']['vbr_method'] == 4) ? 'fast ' : '').'portable';  // 3.94a15 Nov 12 2003
		$LAMEpresetUsedLookup[460]  = '--preset '.(($LAMEtag['raw']['vbr_method'] == 4) ? 'fast ' : '').'medium';    // 3.94a15 Nov 12 2003
		$LAMEpresetUsedLookup[470]  = '--r3mix';                                                                     // 3.94b1  Dec 18 2003
		$LAMEpresetUsedLookup[480]  = '--preset '.(($LAMEtag['raw']['vbr_method'] == 4) ? 'fast ' : '').'standard';  // 3.94a15 Nov 12 2003
		$LAMEpresetUsedLookup[490]  = '-V1';
		$LAMEpresetUsedLookup[500]  = '--preset '.(($LAMEtag['raw']['vbr_method'] == 4) ? 'fast ' : '').'extreme';   // 3.94a15 Nov 12 2003

return (isset($LAMEpresetUsedLookup[$LAMEtag['preset_used_id']]) ? $LAMEpresetUsedLookup[$LAMEtag['preset_used_id']] : 'new/unknown preset: '.$LAMEtag['preset_used_id'].' - report to info@getid3.org');
	}

}
����module.audio-video.matroska.php���������������������������������������������������������������������0000644�����������������00000321213�15150061000�0012554 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������<?php

/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org>               //
//  available at https://github.com/JamesHeinrich/getID3       //
//            or https://www.getid3.org                        //
//            or http://getid3.sourceforge.net                 //
//  see readme.txt for more details                            //
/////////////////////////////////////////////////////////////////
//                                                             //
// module.audio-video.matriska.php                             //
// module for analyzing Matroska containers                    //
// dependencies: NONE                                          //
//                                                            ///
/////////////////////////////////////////////////////////////////

if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
	exit;
}

define('EBML_ID_CHAPTERS',                  0x0043A770); // [10][43][A7][70] -- A system to define basic menus and partition data. For more detailed information, look at the Chapters Explanation.
define('EBML_ID_SEEKHEAD',                  0x014D9B74); // [11][4D][9B][74] -- Contains the position of other level 1 elements.
define('EBML_ID_TAGS',                      0x0254C367); // [12][54][C3][67] -- Element containing elements specific to Tracks/Chapters. A list of valid tags can be found <http://www.matroska.org/technical/specs/tagging/index.html>.
define('EBML_ID_INFO',                      0x0549A966); // [15][49][A9][66] -- Contains miscellaneous general information and statistics on the file.
define('EBML_ID_TRACKS',                    0x0654AE6B); // [16][54][AE][6B] -- A top-level block of information with many tracks described.
define('EBML_ID_SEGMENT',                   0x08538067); // [18][53][80][67] -- This element contains all other top-level (level 1) elements. Typically a Matroska file is composed of 1 segment.
define('EBML_ID_ATTACHMENTS',               0x0941A469); // [19][41][A4][69] -- Contain attached files.
define('EBML_ID_EBML',                      0x0A45DFA3); // [1A][45][DF][A3] -- Set the EBML characteristics of the data to follow. Each EBML document has to start with this.
define('EBML_ID_CUES',                      0x0C53BB6B); // [1C][53][BB][6B] -- A top-level element to speed seeking access. All entries are local to the segment.
define('EBML_ID_CLUSTER',                   0x0F43B675); // [1F][43][B6][75] -- The lower level element containing the (monolithic) Block structure.
define('EBML_ID_LANGUAGE',                    0x02B59C); //     [22][B5][9C] -- Specifies the language of the track in the Matroska languages form.
define('EBML_ID_TRACKTIMECODESCALE',          0x03314F); //     [23][31][4F] -- The scale to apply on this track to work at normal speed in relation with other tracks (mostly used to adjust video speed when the audio length differs).
define('EBML_ID_DEFAULTDURATION',             0x03E383); //     [23][E3][83] -- Number of nanoseconds (i.e. not scaled) per frame.
define('EBML_ID_CODECNAME',                   0x058688); //     [25][86][88] -- A human-readable string specifying the codec.
define('EBML_ID_CODECDOWNLOADURL',            0x06B240); //     [26][B2][40] -- A URL to download about the codec used.
define('EBML_ID_TIMECODESCALE',               0x0AD7B1); //     [2A][D7][B1] -- Timecode scale in nanoseconds (1.000.000 means all timecodes in the segment are expressed in milliseconds).
define('EBML_ID_COLOURSPACE',                 0x0EB524); //     [2E][B5][24] -- Same value as in AVI (32 bits).
define('EBML_ID_GAMMAVALUE',                  0x0FB523); //     [2F][B5][23] -- Gamma Value.
define('EBML_ID_CODECSETTINGS',               0x1A9697); //     [3A][96][97] -- A string describing the encoding setting used.
define('EBML_ID_CODECINFOURL',                0x1B4040); //     [3B][40][40] -- A URL to find information about the codec used.
define('EBML_ID_PREVFILENAME',                0x1C83AB); //     [3C][83][AB] -- An escaped filename corresponding to the previous segment.
define('EBML_ID_PREVUID',                     0x1CB923); //     [3C][B9][23] -- A unique ID to identify the previous chained segment (128 bits).
define('EBML_ID_NEXTFILENAME',                0x1E83BB); //     [3E][83][BB] -- An escaped filename corresponding to the next segment.
define('EBML_ID_NEXTUID',                     0x1EB923); //     [3E][B9][23] -- A unique ID to identify the next chained segment (128 bits).
define('EBML_ID_CONTENTCOMPALGO',               0x0254); //         [42][54] -- The compression algorithm used. Algorithms that have been specified so far are:
define('EBML_ID_CONTENTCOMPSETTINGS',           0x0255); //         [42][55] -- Settings that might be needed by the decompressor. For Header Stripping (ContentCompAlgo=3), the bytes that were removed from the beggining of each frames of the track.
define('EBML_ID_DOCTYPE',                       0x0282); //         [42][82] -- A string that describes the type of document that follows this EBML header ('matroska' in our case).
define('EBML_ID_DOCTYPEREADVERSION',            0x0285); //         [42][85] -- The minimum DocType version an interpreter has to support to read this file.
define('EBML_ID_EBMLVERSION',                   0x0286); //         [42][86] -- The version of EBML parser used to create the file.
define('EBML_ID_DOCTYPEVERSION',                0x0287); //         [42][87] -- The version of DocType interpreter used to create the file.
define('EBML_ID_EBMLMAXIDLENGTH',               0x02F2); //         [42][F2] -- The maximum length of the IDs you'll find in this file (4 or less in Matroska).
define('EBML_ID_EBMLMAXSIZELENGTH',             0x02F3); //         [42][F3] -- The maximum length of the sizes you'll find in this file (8 or less in Matroska). This does not override the element size indicated at the beginning of an element. Elements that have an indicated size which is larger than what is allowed by EBMLMaxSizeLength shall be considered invalid.
define('EBML_ID_EBMLREADVERSION',               0x02F7); //         [42][F7] -- The minimum EBML version a parser has to support to read this file.
define('EBML_ID_CHAPLANGUAGE',                  0x037C); //         [43][7C] -- The languages corresponding to the string, in the bibliographic ISO-639-2 form.
define('EBML_ID_CHAPCOUNTRY',                   0x037E); //         [43][7E] -- The countries corresponding to the string, same 2 octets as in Internet domains.
define('EBML_ID_SEGMENTFAMILY',                 0x0444); //         [44][44] -- A randomly generated unique ID that all segments related to each other must use (128 bits).
define('EBML_ID_DATEUTC',                       0x0461); //         [44][61] -- Date of the origin of timecode (value 0), i.e. production date.
define('EBML_ID_TAGLANGUAGE',                   0x047A); //         [44][7A] -- Specifies the language of the tag specified, in the Matroska languages form.
define('EBML_ID_TAGDEFAULT',                    0x0484); //         [44][84] -- Indication to know if this is the default/original language to use for the given tag.
define('EBML_ID_TAGBINARY',                     0x0485); //         [44][85] -- The values of the Tag if it is binary. Note that this cannot be used in the same SimpleTag as TagString.
define('EBML_ID_TAGSTRING',                     0x0487); //         [44][87] -- The value of the Tag.
define('EBML_ID_DURATION',                      0x0489); //         [44][89] -- Duration of the segment (based on TimecodeScale).
define('EBML_ID_CHAPPROCESSPRIVATE',            0x050D); //         [45][0D] -- Some optional data attached to the ChapProcessCodecID information. For ChapProcessCodecID = 1, it is the "DVD level" equivalent.
define('EBML_ID_CHAPTERFLAGENABLED',            0x0598); //         [45][98] -- Specify wether the chapter is enabled. It can be enabled/disabled by a Control Track. When disabled, the movie should skip all the content between the TimeStart and TimeEnd of this chapter.
define('EBML_ID_TAGNAME',                       0x05A3); //         [45][A3] -- The name of the Tag that is going to be stored.
define('EBML_ID_EDITIONENTRY',                  0x05B9); //         [45][B9] -- Contains all information about a segment edition.
define('EBML_ID_EDITIONUID',                    0x05BC); //         [45][BC] -- A unique ID to identify the edition. It's useful for tagging an edition.
define('EBML_ID_EDITIONFLAGHIDDEN',             0x05BD); //         [45][BD] -- If an edition is hidden (1), it should not be available to the user interface (but still to Control Tracks).
define('EBML_ID_EDITIONFLAGDEFAULT',            0x05DB); //         [45][DB] -- If a flag is set (1) the edition should be used as the default one.
define('EBML_ID_EDITIONFLAGORDERED',            0x05DD); //         [45][DD] -- Specify if the chapters can be defined multiple times and the order to play them is enforced.
define('EBML_ID_FILEDATA',                      0x065C); //         [46][5C] -- The data of the file.
define('EBML_ID_FILEMIMETYPE',                  0x0660); //         [46][60] -- MIME type of the file.
define('EBML_ID_FILENAME',                      0x066E); //         [46][6E] -- Filename of the attached file.
define('EBML_ID_FILEREFERRAL',                  0x0675); //         [46][75] -- A binary value that a track/codec can refer to when the attachment is needed.
define('EBML_ID_FILEDESCRIPTION',               0x067E); //         [46][7E] -- A human-friendly name for the attached file.
define('EBML_ID_FILEUID',                       0x06AE); //         [46][AE] -- Unique ID representing the file, as random as possible.
define('EBML_ID_CONTENTENCALGO',                0x07E1); //         [47][E1] -- The encryption algorithm used. The value '0' means that the contents have not been encrypted but only signed. Predefined values:
define('EBML_ID_CONTENTENCKEYID',               0x07E2); //         [47][E2] -- For public key algorithms this is the ID of the public key the data was encrypted with.
define('EBML_ID_CONTENTSIGNATURE',              0x07E3); //         [47][E3] -- A cryptographic signature of the contents.
define('EBML_ID_CONTENTSIGKEYID',               0x07E4); //         [47][E4] -- This is the ID of the private key the data was signed with.
define('EBML_ID_CONTENTSIGALGO',                0x07E5); //         [47][E5] -- The algorithm used for the signature. A value of '0' means that the contents have not been signed but only encrypted. Predefined values:
define('EBML_ID_CONTENTSIGHASHALGO',            0x07E6); //         [47][E6] -- The hash algorithm used for the signature. A value of '0' means that the contents have not been signed but only encrypted. Predefined values:
define('EBML_ID_MUXINGAPP',                     0x0D80); //         [4D][80] -- Muxing application or library ("libmatroska-0.4.3").
define('EBML_ID_SEEK',                          0x0DBB); //         [4D][BB] -- Contains a single seek entry to an EBML element.
define('EBML_ID_CONTENTENCODINGORDER',          0x1031); //         [50][31] -- Tells when this modification was used during encoding/muxing starting with 0 and counting upwards. The decoder/demuxer has to start with the highest order number it finds and work its way down. This value has to be unique over all ContentEncodingOrder elements in the segment.
define('EBML_ID_CONTENTENCODINGSCOPE',          0x1032); //         [50][32] -- A bit field that describes which elements have been modified in this way. Values (big endian) can be OR'ed. Possible values:
define('EBML_ID_CONTENTENCODINGTYPE',           0x1033); //         [50][33] -- A value describing what kind of transformation has been done. Possible values:
define('EBML_ID_CONTENTCOMPRESSION',            0x1034); //         [50][34] -- Settings describing the compression used. Must be present if the value of ContentEncodingType is 0 and absent otherwise. Each block must be decompressable even if no previous block is available in order not to prevent seeking.
define('EBML_ID_CONTENTENCRYPTION',             0x1035); //         [50][35] -- Settings describing the encryption used. Must be present if the value of ContentEncodingType is 1 and absent otherwise.
define('EBML_ID_CUEREFNUMBER',                  0x135F); //         [53][5F] -- Number of the referenced Block of Track X in the specified Cluster.
define('EBML_ID_NAME',                          0x136E); //         [53][6E] -- A human-readable track name.
define('EBML_ID_CUEBLOCKNUMBER',                0x1378); //         [53][78] -- Number of the Block in the specified Cluster.
define('EBML_ID_TRACKOFFSET',                   0x137F); //         [53][7F] -- A value to add to the Block's Timecode. This can be used to adjust the playback offset of a track.
define('EBML_ID_SEEKID',                        0x13AB); //         [53][AB] -- The binary ID corresponding to the element name.
define('EBML_ID_SEEKPOSITION',                  0x13AC); //         [53][AC] -- The position of the element in the segment in octets (0 = first level 1 element).
define('EBML_ID_STEREOMODE',                    0x13B8); //         [53][B8] -- Stereo-3D video mode.
define('EBML_ID_OLDSTEREOMODE',                 0x13B9); //         [53][B9] -- Bogus StereoMode value used in old versions of libmatroska. DO NOT USE. (0: mono, 1: right eye, 2: left eye, 3: both eyes).
define('EBML_ID_PIXELCROPBOTTOM',               0x14AA); //         [54][AA] -- The number of video pixels to remove at the bottom of the image (for HDTV content).
define('EBML_ID_DISPLAYWIDTH',                  0x14B0); //         [54][B0] -- Width of the video frames to display.
define('EBML_ID_DISPLAYUNIT',                   0x14B2); //         [54][B2] -- Type of the unit for DisplayWidth/Height (0: pixels, 1: centimeters, 2: inches).
define('EBML_ID_ASPECTRATIOTYPE',               0x14B3); //         [54][B3] -- Specify the possible modifications to the aspect ratio (0: free resizing, 1: keep aspect ratio, 2: fixed).
define('EBML_ID_DISPLAYHEIGHT',                 0x14BA); //         [54][BA] -- Height of the video frames to display.
define('EBML_ID_PIXELCROPTOP',                  0x14BB); //         [54][BB] -- The number of video pixels to remove at the top of the image.
define('EBML_ID_PIXELCROPLEFT',                 0x14CC); //         [54][CC] -- The number of video pixels to remove on the left of the image.
define('EBML_ID_PIXELCROPRIGHT',                0x14DD); //         [54][DD] -- The number of video pixels to remove on the right of the image.
define('EBML_ID_FLAGFORCED',                    0x15AA); //         [55][AA] -- Set if that track MUST be used during playback. There can be many forced track for a kind (audio, video or subs), the player should select the one which language matches the user preference or the default + forced track. Overlay MAY happen between a forced and non-forced track of the same kind.
define('EBML_ID_MAXBLOCKADDITIONID',            0x15EE); //         [55][EE] -- The maximum value of BlockAddID. A value 0 means there is no BlockAdditions for this track.
define('EBML_ID_WRITINGAPP',                    0x1741); //         [57][41] -- Writing application ("mkvmerge-0.3.3").
define('EBML_ID_CLUSTERSILENTTRACKS',           0x1854); //         [58][54] -- The list of tracks that are not used in that part of the stream. It is useful when using overlay tracks on seeking. Then you should decide what track to use.
define('EBML_ID_CLUSTERSILENTTRACKNUMBER',      0x18D7); //         [58][D7] -- One of the track number that are not used from now on in the stream. It could change later if not specified as silent in a further Cluster.
define('EBML_ID_ATTACHEDFILE',                  0x21A7); //         [61][A7] -- An attached file.
define('EBML_ID_CONTENTENCODING',               0x2240); //         [62][40] -- Settings for one content encoding like compression or encryption.
define('EBML_ID_BITDEPTH',                      0x2264); //         [62][64] -- Bits per sample, mostly used for PCM.
define('EBML_ID_CODECPRIVATE',                  0x23A2); //         [63][A2] -- Private data only known to the codec.
define('EBML_ID_TARGETS',                       0x23C0); //         [63][C0] -- Contain all UIDs where the specified meta data apply. It is void to describe everything in the segment.
define('EBML_ID_CHAPTERPHYSICALEQUIV',          0x23C3); //         [63][C3] -- Specify the physical equivalent of this ChapterAtom like "DVD" (60) or "SIDE" (50), see complete list of values.
define('EBML_ID_TAGCHAPTERUID',                 0x23C4); //         [63][C4] -- A unique ID to identify the Chapter(s) the tags belong to. If the value is 0 at this level, the tags apply to all chapters in the Segment.
define('EBML_ID_TAGTRACKUID',                   0x23C5); //         [63][C5] -- A unique ID to identify the Track(s) the tags belong to. If the value is 0 at this level, the tags apply to all tracks in the Segment.
define('EBML_ID_TAGATTACHMENTUID',              0x23C6); //         [63][C6] -- A unique ID to identify the Attachment(s) the tags belong to. If the value is 0 at this level, the tags apply to all the attachments in the Segment.
define('EBML_ID_TAGEDITIONUID',                 0x23C9); //         [63][C9] -- A unique ID to identify the EditionEntry(s) the tags belong to. If the value is 0 at this level, the tags apply to all editions in the Segment.
define('EBML_ID_TARGETTYPE',                    0x23CA); //         [63][CA] -- An informational string that can be used to display the logical level of the target like "ALBUM", "TRACK", "MOVIE", "CHAPTER", etc (see TargetType).
define('EBML_ID_TRACKTRANSLATE',                0x2624); //         [66][24] -- The track identification for the given Chapter Codec.
define('EBML_ID_TRACKTRANSLATETRACKID',         0x26A5); //         [66][A5] -- The binary value used to represent this track in the chapter codec data. The format depends on the ChapProcessCodecID used.
define('EBML_ID_TRACKTRANSLATECODEC',           0x26BF); //         [66][BF] -- The chapter codec using this ID (0: Matroska Script, 1: DVD-menu).
define('EBML_ID_TRACKTRANSLATEEDITIONUID',      0x26FC); //         [66][FC] -- Specify an edition UID on which this translation applies. When not specified, it means for all editions found in the segment.
define('EBML_ID_SIMPLETAG',                     0x27C8); //         [67][C8] -- Contains general information about the target.
define('EBML_ID_TARGETTYPEVALUE',               0x28CA); //         [68][CA] -- A number to indicate the logical level of the target (see TargetType).
define('EBML_ID_CHAPPROCESSCOMMAND',            0x2911); //         [69][11] -- Contains all the commands associated to the Atom.
define('EBML_ID_CHAPPROCESSTIME',               0x2922); //         [69][22] -- Defines when the process command should be handled (0: during the whole chapter, 1: before starting playback, 2: after playback of the chapter).
define('EBML_ID_CHAPTERTRANSLATE',              0x2924); //         [69][24] -- A tuple of corresponding ID used by chapter codecs to represent this segment.
define('EBML_ID_CHAPPROCESSDATA',               0x2933); //         [69][33] -- Contains the command information. The data should be interpreted depending on the ChapProcessCodecID value. For ChapProcessCodecID = 1, the data correspond to the binary DVD cell pre/post commands.
define('EBML_ID_CHAPPROCESS',                   0x2944); //         [69][44] -- Contains all the commands associated to the Atom.
define('EBML_ID_CHAPPROCESSCODECID',            0x2955); //         [69][55] -- Contains the type of the codec used for the processing. A value of 0 means native Matroska processing (to be defined), a value of 1 means the DVD command set is used. More codec IDs can be added later.
define('EBML_ID_CHAPTERTRANSLATEID',            0x29A5); //         [69][A5] -- The binary value used to represent this segment in the chapter codec data. The format depends on the ChapProcessCodecID used.
define('EBML_ID_CHAPTERTRANSLATECODEC',         0x29BF); //         [69][BF] -- The chapter codec using this ID (0: Matroska Script, 1: DVD-menu).
define('EBML_ID_CHAPTERTRANSLATEEDITIONUID',    0x29FC); //         [69][FC] -- Specify an edition UID on which this correspondance applies. When not specified, it means for all editions found in the segment.
define('EBML_ID_CONTENTENCODINGS',              0x2D80); //         [6D][80] -- Settings for several content encoding mechanisms like compression or encryption.
define('EBML_ID_MINCACHE',                      0x2DE7); //         [6D][E7] -- The minimum number of frames a player should be able to cache during playback. If set to 0, the reference pseudo-cache system is not used.
define('EBML_ID_MAXCACHE',                      0x2DF8); //         [6D][F8] -- The maximum cache size required to store referenced frames in and the current frame. 0 means no cache is needed.
define('EBML_ID_CHAPTERSEGMENTUID',             0x2E67); //         [6E][67] -- A segment to play in place of this chapter. Edition ChapterSegmentEditionUID should be used for this segment, otherwise no edition is used.
define('EBML_ID_CHAPTERSEGMENTEDITIONUID',      0x2EBC); //         [6E][BC] -- The edition to play from the segment linked in ChapterSegmentUID.
define('EBML_ID_TRACKOVERLAY',                  0x2FAB); //         [6F][AB] -- Specify that this track is an overlay track for the Track specified (in the u-integer). That means when this track has a gap (see SilentTracks) the overlay track should be used instead. The order of multiple TrackOverlay matters, the first one is the one that should be used. If not found it should be the second, etc.
define('EBML_ID_TAG',                           0x3373); //         [73][73] -- Element containing elements specific to Tracks/Chapters.
define('EBML_ID_SEGMENTFILENAME',               0x3384); //         [73][84] -- A filename corresponding to this segment.
define('EBML_ID_SEGMENTUID',                    0x33A4); //         [73][A4] -- A randomly generated unique ID to identify the current segment between many others (128 bits).
define('EBML_ID_CHAPTERUID',                    0x33C4); //         [73][C4] -- A unique ID to identify the Chapter.
define('EBML_ID_TRACKUID',                      0x33C5); //         [73][C5] -- A unique ID to identify the Track. This should be kept the same when making a direct stream copy of the Track to another file.
define('EBML_ID_ATTACHMENTLINK',                0x3446); //         [74][46] -- The UID of an attachment that is used by this codec.
define('EBML_ID_CLUSTERBLOCKADDITIONS',         0x35A1); //         [75][A1] -- Contain additional blocks to complete the main one. An EBML parser that has no knowledge of the Block structure could still see and use/skip these data.
define('EBML_ID_CHANNELPOSITIONS',              0x347B); //         [7D][7B] -- Table of horizontal angles for each successive channel, see appendix.
define('EBML_ID_OUTPUTSAMPLINGFREQUENCY',       0x38B5); //         [78][B5] -- Real output sampling frequency in Hz (used for SBR techniques).
define('EBML_ID_TITLE',                         0x3BA9); //         [7B][A9] -- General name of the segment.
define('EBML_ID_CHAPTERDISPLAY',                  0x00); //             [80] -- Contains all possible strings to use for the chapter display.
define('EBML_ID_TRACKTYPE',                       0x03); //             [83] -- A set of track types coded on 8 bits (1: video, 2: audio, 3: complex, 0x10: logo, 0x11: subtitle, 0x12: buttons, 0x20: control).
define('EBML_ID_CHAPSTRING',                      0x05); //             [85] -- Contains the string to use as the chapter atom.
define('EBML_ID_CODECID',                         0x06); //             [86] -- An ID corresponding to the codec, see the codec page for more info.
define('EBML_ID_FLAGDEFAULT',                     0x08); //             [88] -- Set if that track (audio, video or subs) SHOULD be used if no language found matches the user preference.
define('EBML_ID_CHAPTERTRACKNUMBER',              0x09); //             [89] -- UID of the Track to apply this chapter too. In the absense of a control track, choosing this chapter will select the listed Tracks and deselect unlisted tracks. Absense of this element indicates that the Chapter should be applied to any currently used Tracks.
define('EBML_ID_CLUSTERSLICES',                   0x0E); //             [8E] -- Contains slices description.
define('EBML_ID_CHAPTERTRACK',                    0x0F); //             [8F] -- List of tracks on which the chapter applies. If this element is not present, all tracks apply
define('EBML_ID_CHAPTERTIMESTART',                0x11); //             [91] -- Timecode of the start of Chapter (not scaled).
define('EBML_ID_CHAPTERTIMEEND',                  0x12); //             [92] -- Timecode of the end of Chapter (timecode excluded, not scaled).
define('EBML_ID_CUEREFTIME',                      0x16); //             [96] -- Timecode of the referenced Block.
define('EBML_ID_CUEREFCLUSTER',                   0x17); //             [97] -- Position of the Cluster containing the referenced Block.
define('EBML_ID_CHAPTERFLAGHIDDEN',               0x18); //             [98] -- If a chapter is hidden (1), it should not be available to the user interface (but still to Control Tracks).
define('EBML_ID_FLAGINTERLACED',                  0x1A); //             [9A] -- Set if the video is interlaced.
define('EBML_ID_CLUSTERBLOCKDURATION',            0x1B); //             [9B] -- The duration of the Block (based on TimecodeScale). This element is mandatory when DefaultDuration is set for the track. When not written and with no DefaultDuration, the value is assumed to be the difference between the timecode of this Block and the timecode of the next Block in "display" order (not coding order). This element can be useful at the end of a Track (as there is not other Block available), or when there is a break in a track like for subtitle tracks.
define('EBML_ID_FLAGLACING',                      0x1C); //             [9C] -- Set if the track may contain blocks using lacing.
define('EBML_ID_CHANNELS',                        0x1F); //             [9F] -- Numbers of channels in the track.
define('EBML_ID_CLUSTERBLOCKGROUP',               0x20); //             [A0] -- Basic container of information containing a single Block or BlockVirtual, and information specific to that Block/VirtualBlock.
define('EBML_ID_CLUSTERBLOCK',                    0x21); //             [A1] -- Block containing the actual data to be rendered and a timecode relative to the Cluster Timecode.
define('EBML_ID_CLUSTERBLOCKVIRTUAL',             0x22); //             [A2] -- A Block with no data. It must be stored in the stream at the place the real Block should be in display order.
define('EBML_ID_CLUSTERSIMPLEBLOCK',              0x23); //             [A3] -- Similar to Block but without all the extra information, mostly used to reduced overhead when no extra feature is needed.
define('EBML_ID_CLUSTERCODECSTATE',               0x24); //             [A4] -- The new codec state to use. Data interpretation is private to the codec. This information should always be referenced by a seek entry.
define('EBML_ID_CLUSTERBLOCKADDITIONAL',          0x25); //             [A5] -- Interpreted by the codec as it wishes (using the BlockAddID).
define('EBML_ID_CLUSTERBLOCKMORE',                0x26); //             [A6] -- Contain the BlockAdditional and some parameters.
define('EBML_ID_CLUSTERPOSITION',                 0x27); //             [A7] -- Position of the Cluster in the segment (0 in live broadcast streams). It might help to resynchronise offset on damaged streams.
define('EBML_ID_CODECDECODEALL',                  0x2A); //             [AA] -- The codec can decode potentially damaged data.
define('EBML_ID_CLUSTERPREVSIZE',                 0x2B); //             [AB] -- Size of the previous Cluster, in octets. Can be useful for backward playing.
define('EBML_ID_TRACKENTRY',                      0x2E); //             [AE] -- Describes a track with all elements.
define('EBML_ID_CLUSTERENCRYPTEDBLOCK',           0x2F); //             [AF] -- Similar to SimpleBlock but the data inside the Block are Transformed (encrypt and/or signed).
define('EBML_ID_PIXELWIDTH',                      0x30); //             [B0] -- Width of the encoded video frames in pixels.
define('EBML_ID_CUETIME',                         0x33); //             [B3] -- Absolute timecode according to the segment time base.
define('EBML_ID_SAMPLINGFREQUENCY',               0x35); //             [B5] -- Sampling frequency in Hz.
define('EBML_ID_CHAPTERATOM',                     0x36); //             [B6] -- Contains the atom information to use as the chapter atom (apply to all tracks).
define('EBML_ID_CUETRACKPOSITIONS',               0x37); //             [B7] -- Contain positions for different tracks corresponding to the timecode.
define('EBML_ID_FLAGENABLED',                     0x39); //             [B9] -- Set if the track is used.
define('EBML_ID_PIXELHEIGHT',                     0x3A); //             [BA] -- Height of the encoded video frames in pixels.
define('EBML_ID_CUEPOINT',                        0x3B); //             [BB] -- Contains all information relative to a seek point in the segment.
define('EBML_ID_CRC32',                           0x3F); //             [BF] -- The CRC is computed on all the data of the Master element it's in, regardless of its position. It's recommended to put the CRC value at the beggining of the Master element for easier reading. All level 1 elements should include a CRC-32.
define('EBML_ID_CLUSTERBLOCKADDITIONID',          0x4B); //             [CB] -- The ID of the BlockAdditional element (0 is the main Block).
define('EBML_ID_CLUSTERLACENUMBER',               0x4C); //             [CC] -- The reverse number of the frame in the lace (0 is the last frame, 1 is the next to last, etc). While there are a few files in the wild with this element, it is no longer in use and has been deprecated. Being able to interpret this element is not required for playback.
define('EBML_ID_CLUSTERFRAMENUMBER',              0x4D); //             [CD] -- The number of the frame to generate from this lace with this delay (allow you to generate many frames from the same Block/Frame).
define('EBML_ID_CLUSTERDELAY',                    0x4E); //             [CE] -- The (scaled) delay to apply to the element.
define('EBML_ID_CLUSTERDURATION',                 0x4F); //             [CF] -- The (scaled) duration to apply to the element.
define('EBML_ID_TRACKNUMBER',                     0x57); //             [D7] -- The track number as used in the Block Header (using more than 127 tracks is not encouraged, though the design allows an unlimited number).
define('EBML_ID_CUEREFERENCE',                    0x5B); //             [DB] -- The Clusters containing the required referenced Blocks.
define('EBML_ID_VIDEO',                           0x60); //             [E0] -- Video settings.
define('EBML_ID_AUDIO',                           0x61); //             [E1] -- Audio settings.
define('EBML_ID_CLUSTERTIMESLICE',                0x68); //             [E8] -- Contains extra time information about the data contained in the Block. While there are a few files in the wild with this element, it is no longer in use and has been deprecated. Being able to interpret this element is not required for playback.
define('EBML_ID_CUECODECSTATE',                   0x6A); //             [EA] -- The position of the Codec State corresponding to this Cue element. 0 means that the data is taken from the initial Track Entry.
define('EBML_ID_CUEREFCODECSTATE',                0x6B); //             [EB] -- The position of the Codec State corresponding to this referenced element. 0 means that the data is taken from the initial Track Entry.
define('EBML_ID_VOID',                            0x6C); //             [EC] -- Used to void damaged data, to avoid unexpected behaviors when using damaged data. The content is discarded. Also used to reserve space in a sub-element for later use.
define('EBML_ID_CLUSTERTIMECODE',                 0x67); //             [E7] -- Absolute timecode of the cluster (based on TimecodeScale).
define('EBML_ID_CLUSTERBLOCKADDID',               0x6E); //             [EE] -- An ID to identify the BlockAdditional level.
define('EBML_ID_CUECLUSTERPOSITION',              0x71); //             [F1] -- The position of the Cluster containing the required Block.
define('EBML_ID_CUETRACK',                        0x77); //             [F7] -- The track for which a position is given.
define('EBML_ID_CLUSTERREFERENCEPRIORITY',        0x7A); //             [FA] -- This frame is referenced and has the specified cache priority. In cache only a frame of the same or higher priority can replace this frame. A value of 0 means the frame is not referenced.
define('EBML_ID_CLUSTERREFERENCEBLOCK',           0x7B); //             [FB] -- Timecode of another frame used as a reference (ie: B or P frame). The timecode is relative to the block it's attached to.
define('EBML_ID_CLUSTERREFERENCEVIRTUAL',         0x7D); //             [FD] -- Relative position of the data that should be in position of the virtual block.

/**
* @tutorial http://www.matroska.org/technical/specs/index.html
*
* @todo Rewrite EBML parser to reduce it's size and honor default element values
* @todo After rewrite implement stream size calculation, that will provide additional useful info and enable AAC/FLAC audio bitrate detection
*/
class getid3_matroska extends getid3_handler
{
	/**
	 * If true, do not return information about CLUSTER chunks, since there's a lot of them
	 * and they're not usually useful [default: TRUE].
	 *
	 * @var bool
	 */
	public $hide_clusters    = true;

/**
	 * True to parse the whole file, not only header [default: FALSE].
	 *
	 * @var bool
	 */
	public $parse_whole_file = false;

/*
	 * Private parser settings/placeholders.
	 */
	private $EBMLbuffer        = '';
	private $EBMLbuffer_offset = 0;
	private $EBMLbuffer_length = 0;
	private $current_offset    = 0;
	private $unuseful_elements = array(EBML_ID_CRC32, EBML_ID_VOID);

/**
	 * @return bool
	 */
	public function Analyze()
	{
		$info = &$this->getid3->info;

// parse container
		try {
			$this->parseEBML($info);
		} catch (Exception $e) {
			$this->error('EBML parser: '.$e->getMessage());
		}

// calculate playtime
		if (isset($info['matroska']['info']) && is_array($info['matroska']['info'])) {
			foreach ($info['matroska']['info'] as $key => $infoarray) {
				if (isset($infoarray['Duration'])) {
					// TimecodeScale is how many nanoseconds each Duration unit is
					$info['playtime_seconds'] = $infoarray['Duration'] * ((isset($infoarray['TimecodeScale']) ? $infoarray['TimecodeScale'] : 1000000) / 1000000000);
					break;
				}
			}
		}

// extract tags
		if (isset($info['matroska']['tags']) && is_array($info['matroska']['tags'])) {
			foreach ($info['matroska']['tags'] as $key => $infoarray) {
				$this->ExtractCommentsSimpleTag($infoarray);
			}
		}

// process tracks
		if (isset($info['matroska']['tracks']['tracks']) && is_array($info['matroska']['tracks']['tracks'])) {
			foreach ($info['matroska']['tracks']['tracks'] as $key => $trackarray) {

$track_info = array();
				$track_info['dataformat'] = self::CodecIDtoCommonName($trackarray['CodecID']);
				$track_info['default'] = (isset($trackarray['FlagDefault']) ? $trackarray['FlagDefault'] : true);
				if (isset($trackarray['Name'])) { $track_info['name'] = $trackarray['Name']; }

switch ($trackarray['TrackType']) {

case 1: // Video
						$track_info['resolution_x'] = $trackarray['PixelWidth'];
						$track_info['resolution_y'] = $trackarray['PixelHeight'];
						$track_info['display_unit'] = self::displayUnit(isset($trackarray['DisplayUnit']) ? $trackarray['DisplayUnit'] : 0);
						$track_info['display_x']    = (isset($trackarray['DisplayWidth']) ? $trackarray['DisplayWidth'] : $trackarray['PixelWidth']);
						$track_info['display_y']    = (isset($trackarray['DisplayHeight']) ? $trackarray['DisplayHeight'] : $trackarray['PixelHeight']);

if (isset($trackarray['PixelCropBottom']))  { $track_info['crop_bottom'] = $trackarray['PixelCropBottom']; }
						if (isset($trackarray['PixelCropTop']))     { $track_info['crop_top']    = $trackarray['PixelCropTop']; }
						if (isset($trackarray['PixelCropLeft']))    { $track_info['crop_left']   = $trackarray['PixelCropLeft']; }
						if (isset($trackarray['PixelCropRight']))   { $track_info['crop_right']  = $trackarray['PixelCropRight']; }
						if (!empty($trackarray['DefaultDuration'])) { $track_info['frame_rate']  = round(1000000000 / $trackarray['DefaultDuration'], 3); }
						if (isset($trackarray['CodecName']))        { $track_info['codec']       = $trackarray['CodecName']; }

switch ($trackarray['CodecID']) {
							case 'V_MS/VFW/FOURCC':
								getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio-video.riff.php', __FILE__, true);

$parsed = getid3_riff::ParseBITMAPINFOHEADER($trackarray['CodecPrivate']);
								$track_info['codec'] = getid3_riff::fourccLookup($parsed['fourcc']);
								$info['matroska']['track_codec_parsed'][$trackarray['TrackNumber']] = $parsed;
								break;

/*case 'V_MPEG4/ISO/AVC':
								$h264['profile']    = getid3_lib::BigEndian2Int(substr($trackarray['CodecPrivate'], 1, 1));
								$h264['level']      = getid3_lib::BigEndian2Int(substr($trackarray['CodecPrivate'], 3, 1));
								$rn                 = getid3_lib::BigEndian2Int(substr($trackarray['CodecPrivate'], 4, 1));
								$h264['NALUlength'] = ($rn & 3) + 1;
								$rn                 = getid3_lib::BigEndian2Int(substr($trackarray['CodecPrivate'], 5, 1));
								$nsps               = ($rn & 31);
								$offset             = 6;
								for ($i = 0; $i < $nsps; $i ++) {
									$length        = getid3_lib::BigEndian2Int(substr($trackarray['CodecPrivate'], $offset, 2));
									$h264['SPS'][] = substr($trackarray['CodecPrivate'], $offset + 2, $length);
									$offset       += 2 + $length;
								}
								$npps               = getid3_lib::BigEndian2Int(substr($trackarray['CodecPrivate'], $offset, 1));
								$offset            += 1;
								for ($i = 0; $i < $npps; $i ++) {
									$length        = getid3_lib::BigEndian2Int(substr($trackarray['CodecPrivate'], $offset, 2));
									$h264['PPS'][] = substr($trackarray['CodecPrivate'], $offset + 2, $length);
									$offset       += 2 + $length;
								}
								$info['matroska']['track_codec_parsed'][$trackarray['TrackNumber']] = $h264;
								break;*/
						}

$info['video']['streams'][$trackarray['TrackUID']] = $track_info;
						break;

case 2: // Audio
						$track_info['sample_rate'] = (isset($trackarray['SamplingFrequency']) ? $trackarray['SamplingFrequency'] : 8000.0);
						$track_info['channels']    = (isset($trackarray['Channels']) ? $trackarray['Channels'] : 1);
						$track_info['language']    = (isset($trackarray['Language']) ? $trackarray['Language'] : 'eng');
						if (isset($trackarray['BitDepth']))  { $track_info['bits_per_sample'] = $trackarray['BitDepth']; }
						if (isset($trackarray['CodecName'])) { $track_info['codec']           = $trackarray['CodecName']; }

switch ($trackarray['CodecID']) {
							case 'A_PCM/INT/LIT':
							case 'A_PCM/INT/BIG':
								$track_info['bitrate'] = $track_info['sample_rate'] * $track_info['channels'] * $trackarray['BitDepth'];
								break;

case 'A_AC3':
							case 'A_EAC3':
							case 'A_DTS':
							case 'A_MPEG/L3':
							case 'A_MPEG/L2':
							case 'A_FLAC':
								$module_dataformat = ($track_info['dataformat'] == 'mp2' ? 'mp3' : ($track_info['dataformat'] == 'eac3' ? 'ac3' : $track_info['dataformat']));
								getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.'.$module_dataformat.'.php', __FILE__, true);

if (!isset($info['matroska']['track_data_offsets'][$trackarray['TrackNumber']])) {
									$this->warning('Unable to parse audio data ['.basename(__FILE__).':'.__LINE__.'] because $info[matroska][track_data_offsets]['.$trackarray['TrackNumber'].'] not set');
									break;
								}

// create temp instance
								$getid3_temp = new getID3();
								if ($track_info['dataformat'] != 'flac') {
									$getid3_temp->openfile($this->getid3->filename, $this->getid3->info['filesize'], $this->getid3->fp);
								}
								$getid3_temp->info['avdataoffset'] = $info['matroska']['track_data_offsets'][$trackarray['TrackNumber']]['offset'];
								if ($track_info['dataformat'][0] == 'm' || $track_info['dataformat'] == 'flac') {
									$getid3_temp->info['avdataend'] = $info['matroska']['track_data_offsets'][$trackarray['TrackNumber']]['offset'] + $info['matroska']['track_data_offsets'][$trackarray['TrackNumber']]['length'];
								}

// analyze
								$class = 'getid3_'.$module_dataformat;
								$header_data_key = $track_info['dataformat'][0] == 'm' ? 'mpeg' : $track_info['dataformat'];
								$getid3_audio = new $class($getid3_temp, __CLASS__);
								if ($track_info['dataformat'] == 'flac') {
									$getid3_audio->AnalyzeString($trackarray['CodecPrivate']);
								}
								else {
									$getid3_audio->Analyze();
								}
								if (!empty($getid3_temp->info[$header_data_key])) {
									$info['matroska']['track_codec_parsed'][$trackarray['TrackNumber']] = $getid3_temp->info[$header_data_key];
									if (isset($getid3_temp->info['audio']) && is_array($getid3_temp->info['audio'])) {
										foreach ($getid3_temp->info['audio'] as $sub_key => $value) {
											$track_info[$sub_key] = $value;
										}
									}
								}
								else {
									$this->warning('Unable to parse audio data ['.basename(__FILE__).':'.__LINE__.'] because '.$class.'::Analyze() failed at offset '.$getid3_temp->info['avdataoffset']);
								}

// copy errors and warnings
								if (!empty($getid3_temp->info['error'])) {
									foreach ($getid3_temp->info['error'] as $newerror) {
										$this->warning($class.'() says: ['.$newerror.']');
									}
								}
								if (!empty($getid3_temp->info['warning'])) {
									foreach ($getid3_temp->info['warning'] as $newerror) {
										$this->warning($class.'() says: ['.$newerror.']');
									}
								}
								unset($getid3_temp, $getid3_audio);
								break;

case 'A_AAC':
							case 'A_AAC/MPEG2/LC':
							case 'A_AAC/MPEG2/LC/SBR':
							case 'A_AAC/MPEG4/LC':
							case 'A_AAC/MPEG4/LC/SBR':
								$this->warning($trackarray['CodecID'].' audio data contains no header, audio/video bitrates can\'t be calculated');
								break;

case 'A_VORBIS':
								if (!isset($trackarray['CodecPrivate'])) {
									$this->warning('Unable to parse audio data ['.basename(__FILE__).':'.__LINE__.'] because CodecPrivate data not set');
									break;
								}
								$vorbis_offset = strpos($trackarray['CodecPrivate'], 'vorbis', 1);
								if ($vorbis_offset === false) {
									$this->warning('Unable to parse audio data ['.basename(__FILE__).':'.__LINE__.'] because CodecPrivate data does not contain "vorbis" keyword');
									break;
								}
								$vorbis_offset -= 1;

getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.ogg.php', __FILE__, true);

// create temp instance
								$getid3_temp = new getID3();

// analyze
								$getid3_ogg = new getid3_ogg($getid3_temp);
								$oggpageinfo['page_seqno'] = 0;
								$getid3_ogg->ParseVorbisPageHeader($trackarray['CodecPrivate'], $vorbis_offset, $oggpageinfo);
								if (!empty($getid3_temp->info['ogg'])) {
									$info['matroska']['track_codec_parsed'][$trackarray['TrackNumber']] = $getid3_temp->info['ogg'];
									if (isset($getid3_temp->info['audio']) && is_array($getid3_temp->info['audio'])) {
										foreach ($getid3_temp->info['audio'] as $sub_key => $value) {
											$track_info[$sub_key] = $value;
										}
									}
								}

// copy errors and warnings
								if (!empty($getid3_temp->info['error'])) {
									foreach ($getid3_temp->info['error'] as $newerror) {
										$this->warning('getid3_ogg() says: ['.$newerror.']');
									}
								}
								if (!empty($getid3_temp->info['warning'])) {
									foreach ($getid3_temp->info['warning'] as $newerror) {
										$this->warning('getid3_ogg() says: ['.$newerror.']');
									}
								}

if (!empty($getid3_temp->info['ogg']['bitrate_nominal'])) {
									$track_info['bitrate'] = $getid3_temp->info['ogg']['bitrate_nominal'];
								}
								unset($getid3_temp, $getid3_ogg, $oggpageinfo, $vorbis_offset);
								break;

case 'A_MS/ACM':
								getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio-video.riff.php', __FILE__, true);

$parsed = getid3_riff::parseWAVEFORMATex($trackarray['CodecPrivate']);
								foreach ($parsed as $sub_key => $value) {
									if ($sub_key != 'raw') {
										$track_info[$sub_key] = $value;
									}
								}
								$info['matroska']['track_codec_parsed'][$trackarray['TrackNumber']] = $parsed;
								break;

default:
								$this->warning('Unhandled audio type "'.(isset($trackarray['CodecID']) ? $trackarray['CodecID'] : '').'"');
								break;
						}

$info['audio']['streams'][$trackarray['TrackUID']] = $track_info;
						break;
				}
			}

if (!empty($info['video']['streams'])) {
				$info['video'] = self::getDefaultStreamInfo($info['video']['streams']);
			}
			if (!empty($info['audio']['streams'])) {
				$info['audio'] = self::getDefaultStreamInfo($info['audio']['streams']);
			}
		}

// process attachments
		if (isset($info['matroska']['attachments']) && $this->getid3->option_save_attachments !== getID3::ATTACHMENTS_NONE) {
			foreach ($info['matroska']['attachments'] as $i => $entry) {
				if (strpos($entry['FileMimeType'], 'image/') === 0 && !empty($entry['FileData'])) {
					$info['matroska']['comments']['picture'][] = array('data' => $entry['FileData'], 'image_mime' => $entry['FileMimeType'], 'filename' => $entry['FileName']);
				}
			}
		}

// determine mime type
		if (!empty($info['video']['streams'])) {
			$info['mime_type'] = ($info['matroska']['doctype'] == 'webm' ? 'video/webm' : 'video/x-matroska');
		} elseif (!empty($info['audio']['streams'])) {
			$info['mime_type'] = ($info['matroska']['doctype'] == 'webm' ? 'audio/webm' : 'audio/x-matroska');
		} elseif (isset($info['mime_type'])) {
			unset($info['mime_type']);
		}

// use _STATISTICS_TAGS if available to set audio/video bitrates
		if (!empty($info['matroska']['tags'])) {
			$_STATISTICS_byTrackUID = array();
			foreach ($info['matroska']['tags'] as $key1 => $value1) {
				if (!empty($value1['Targets']['TagTrackUID'][0]) && !empty($value1['SimpleTag'])) {
					foreach ($value1['SimpleTag'] as $key2 => $value2) {
						if (!empty($value2['TagName']) && isset($value2['TagString'])) {
							$_STATISTICS_byTrackUID[$value1['Targets']['TagTrackUID'][0]][$value2['TagName']] = $value2['TagString'];
						}
					}
				}
			}
			foreach (array('audio','video') as $avtype) {
				if (!empty($info[$avtype]['streams'])) {
					foreach ($info[$avtype]['streams'] as $trackUID => $trackdata) {
						if (!isset($trackdata['bitrate']) && !empty($_STATISTICS_byTrackUID[$trackUID]['BPS'])) {
							$info[$avtype]['streams'][$trackUID]['bitrate'] = (int) $_STATISTICS_byTrackUID[$trackUID]['BPS'];
							@$info[$avtype]['bitrate'] += $info[$avtype]['streams'][$trackUID]['bitrate'];
						}
					}
				}
			}
		}

return true;
	}

/**
	 * @param array $info
	 */
	private function parseEBML(&$info) {
		// http://www.matroska.org/technical/specs/index.html#EBMLBasics
		$this->current_offset = $info['avdataoffset'];

while ($this->getEBMLelement($top_element, $info['avdataend'])) {
			switch ($top_element['id']) {

case EBML_ID_EBML:
					$info['matroska']['header']['offset'] = $top_element['offset'];
					$info['matroska']['header']['length'] = $top_element['length'];

while ($this->getEBMLelement($element_data, $top_element['end'], true)) {
						switch ($element_data['id']) {

case EBML_ID_EBMLVERSION:
							case EBML_ID_EBMLREADVERSION:
							case EBML_ID_EBMLMAXIDLENGTH:
							case EBML_ID_EBMLMAXSIZELENGTH:
							case EBML_ID_DOCTYPEVERSION:
							case EBML_ID_DOCTYPEREADVERSION:
								$element_data['data'] = getid3_lib::BigEndian2Int($element_data['data']);
								break;

case EBML_ID_DOCTYPE:
								$element_data['data'] = getid3_lib::trimNullByte($element_data['data']);
								$info['matroska']['doctype'] = $element_data['data'];
								$info['fileformat'] = $element_data['data'];
								break;

default:
								$this->unhandledElement('header', __LINE__, $element_data);
								break;
						}

unset($element_data['offset'], $element_data['end']);
						$info['matroska']['header']['elements'][] = $element_data;
					}
					break;

case EBML_ID_SEGMENT:
					$info['matroska']['segment'][0]['offset'] = $top_element['offset'];
					$info['matroska']['segment'][0]['length'] = $top_element['length'];

while ($this->getEBMLelement($element_data, $top_element['end'])) {
						if ($element_data['id'] != EBML_ID_CLUSTER || !$this->hide_clusters) { // collect clusters only if required
							$info['matroska']['segments'][] = $element_data;
						}
						switch ($element_data['id']) {

case EBML_ID_SEEKHEAD: // Contains the position of other level 1 elements.

while ($this->getEBMLelement($seek_entry, $element_data['end'])) {
									switch ($seek_entry['id']) {

case EBML_ID_SEEK: // Contains a single seek entry to an EBML element
											while ($this->getEBMLelement($sub_seek_entry, $seek_entry['end'], true)) {

switch ($sub_seek_entry['id']) {

case EBML_ID_SEEKID:
														$seek_entry['target_id']   = self::EBML2Int($sub_seek_entry['data']);
														$seek_entry['target_name'] = self::EBMLidName($seek_entry['target_id']);
														break;

case EBML_ID_SEEKPOSITION:
														$seek_entry['target_offset'] = $element_data['offset'] + getid3_lib::BigEndian2Int($sub_seek_entry['data']);
														break;

default:
														$this->unhandledElement('seekhead.seek', __LINE__, $sub_seek_entry);												}
														break;
											}
											if (!isset($seek_entry['target_id'])) {
												$this->warning('seek_entry[target_id] unexpectedly not set at '.$seek_entry['offset']);
												break;
											}
											if (($seek_entry['target_id'] != EBML_ID_CLUSTER) || !$this->hide_clusters) { // collect clusters only if required
												$info['matroska']['seek'][] = $seek_entry;
											}
											break;

default:
											$this->unhandledElement('seekhead', __LINE__, $seek_entry);
											break;
									}
								}
								break;

case EBML_ID_TRACKS: // A top-level block of information with many tracks described.
								$info['matroska']['tracks'] = $element_data;

while ($this->getEBMLelement($track_entry, $element_data['end'])) {
									switch ($track_entry['id']) {

case EBML_ID_TRACKENTRY: //subelements: Describes a track with all elements.

while ($this->getEBMLelement($subelement, $track_entry['end'], array(EBML_ID_VIDEO, EBML_ID_AUDIO, EBML_ID_CONTENTENCODINGS, EBML_ID_CODECPRIVATE))) {
												switch ($subelement['id']) {

case EBML_ID_TRACKUID:
														$track_entry[$subelement['id_name']] = getid3_lib::PrintHexBytes($subelement['data'], true, false);
														break;
													case EBML_ID_TRACKNUMBER:
													case EBML_ID_TRACKTYPE:
													case EBML_ID_MINCACHE:
													case EBML_ID_MAXCACHE:
													case EBML_ID_MAXBLOCKADDITIONID:
													case EBML_ID_DEFAULTDURATION: // nanoseconds per frame
														$track_entry[$subelement['id_name']] = getid3_lib::BigEndian2Int($subelement['data']);
														break;

case EBML_ID_TRACKTIMECODESCALE:
														$track_entry[$subelement['id_name']] = getid3_lib::BigEndian2Float($subelement['data']);
														break;

case EBML_ID_CODECID:
													case EBML_ID_LANGUAGE:
													case EBML_ID_NAME:
													case EBML_ID_CODECNAME:
														$track_entry[$subelement['id_name']] = getid3_lib::trimNullByte($subelement['data']);
														break;

case EBML_ID_CODECPRIVATE:
														$track_entry[$subelement['id_name']] = $this->readEBMLelementData($subelement['length'], true);
														break;

case EBML_ID_FLAGENABLED:
													case EBML_ID_FLAGDEFAULT:
													case EBML_ID_FLAGFORCED:
													case EBML_ID_FLAGLACING:
													case EBML_ID_CODECDECODEALL:
														$track_entry[$subelement['id_name']] = (bool) getid3_lib::BigEndian2Int($subelement['data']);
														break;

case EBML_ID_VIDEO:

while ($this->getEBMLelement($sub_subelement, $subelement['end'], true)) {
															switch ($sub_subelement['id']) {

case EBML_ID_PIXELWIDTH:
																case EBML_ID_PIXELHEIGHT:
																case EBML_ID_PIXELCROPBOTTOM:
																case EBML_ID_PIXELCROPTOP:
																case EBML_ID_PIXELCROPLEFT:
																case EBML_ID_PIXELCROPRIGHT:
																case EBML_ID_DISPLAYWIDTH:
																case EBML_ID_DISPLAYHEIGHT:
																case EBML_ID_DISPLAYUNIT:
																case EBML_ID_ASPECTRATIOTYPE:
																case EBML_ID_STEREOMODE:
																case EBML_ID_OLDSTEREOMODE:
																	$track_entry[$sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_subelement['data']);
																	break;

case EBML_ID_FLAGINTERLACED:
																	$track_entry[$sub_subelement['id_name']] = (bool)getid3_lib::BigEndian2Int($sub_subelement['data']);
																	break;

case EBML_ID_GAMMAVALUE:
																	$track_entry[$sub_subelement['id_name']] = getid3_lib::BigEndian2Float($sub_subelement['data']);
																	break;

case EBML_ID_COLOURSPACE:
																	$track_entry[$sub_subelement['id_name']] = getid3_lib::trimNullByte($sub_subelement['data']);
																	break;

default:
																	$this->unhandledElement('track.video', __LINE__, $sub_subelement);
																	break;
															}
														}
														break;

case EBML_ID_AUDIO:

while ($this->getEBMLelement($sub_subelement, $subelement['end'], true)) {
															switch ($sub_subelement['id']) {

case EBML_ID_CHANNELS:
																case EBML_ID_BITDEPTH:
																	$track_entry[$sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_subelement['data']);
																	break;

case EBML_ID_SAMPLINGFREQUENCY:
																case EBML_ID_OUTPUTSAMPLINGFREQUENCY:
																	$track_entry[$sub_subelement['id_name']] = getid3_lib::BigEndian2Float($sub_subelement['data']);
																	break;

case EBML_ID_CHANNELPOSITIONS:
																	$track_entry[$sub_subelement['id_name']] = getid3_lib::trimNullByte($sub_subelement['data']);
																	break;

default:
																	$this->unhandledElement('track.audio', __LINE__, $sub_subelement);
																	break;
															}
														}
														break;

case EBML_ID_CONTENTENCODINGS:

while ($this->getEBMLelement($sub_subelement, $subelement['end'])) {
															switch ($sub_subelement['id']) {

case EBML_ID_CONTENTENCODING:

while ($this->getEBMLelement($sub_sub_subelement, $sub_subelement['end'], array(EBML_ID_CONTENTCOMPRESSION, EBML_ID_CONTENTENCRYPTION))) {
																		switch ($sub_sub_subelement['id']) {

case EBML_ID_CONTENTENCODINGORDER:
																			case EBML_ID_CONTENTENCODINGSCOPE:
																			case EBML_ID_CONTENTENCODINGTYPE:
																				$track_entry[$sub_subelement['id_name']][$sub_sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_sub_subelement['data']);
																				break;

case EBML_ID_CONTENTCOMPRESSION:

while ($this->getEBMLelement($sub_sub_sub_subelement, $sub_sub_subelement['end'], true)) {
																					switch ($sub_sub_sub_subelement['id']) {

case EBML_ID_CONTENTCOMPALGO:
																							$track_entry[$sub_subelement['id_name']][$sub_sub_subelement['id_name']][$sub_sub_sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_sub_sub_subelement['data']);
																							break;

case EBML_ID_CONTENTCOMPSETTINGS:
																							$track_entry[$sub_subelement['id_name']][$sub_sub_subelement['id_name']][$sub_sub_sub_subelement['id_name']] = $sub_sub_sub_subelement['data'];
																							break;

default:
																							$this->unhandledElement('track.contentencodings.contentencoding.contentcompression', __LINE__, $sub_sub_sub_subelement);
																							break;
																					}
																				}
																				break;

case EBML_ID_CONTENTENCRYPTION:

while ($this->getEBMLelement($sub_sub_sub_subelement, $sub_sub_subelement['end'], true)) {
																					switch ($sub_sub_sub_subelement['id']) {

case EBML_ID_CONTENTENCALGO:
																						case EBML_ID_CONTENTSIGALGO:
																						case EBML_ID_CONTENTSIGHASHALGO:
																							$track_entry[$sub_subelement['id_name']][$sub_sub_subelement['id_name']][$sub_sub_sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_sub_sub_subelement['data']);
																							break;

case EBML_ID_CONTENTENCKEYID:
																						case EBML_ID_CONTENTSIGNATURE:
																						case EBML_ID_CONTENTSIGKEYID:
																							$track_entry[$sub_subelement['id_name']][$sub_sub_subelement['id_name']][$sub_sub_sub_subelement['id_name']] = $sub_sub_sub_subelement['data'];
																							break;

default:
																				$this->unhandledElement('track.contentencodings.contentencoding', __LINE__, $sub_sub_subelement);
																				break;
																		}
																	}
																	break;

default:
																	$this->unhandledElement('track.contentencodings', __LINE__, $sub_subelement);
																	break;
															}
														}
														break;

default:
														$this->unhandledElement('track', __LINE__, $subelement);
														break;
												}
											}

$info['matroska']['tracks']['tracks'][] = $track_entry;
											break;

default:
											$this->unhandledElement('tracks', __LINE__, $track_entry);
											break;
									}
								}
								break;

case EBML_ID_INFO: // Contains miscellaneous general information and statistics on the file.
								$info_entry = array();

while ($this->getEBMLelement($subelement, $element_data['end'], true)) {
									switch ($subelement['id']) {

case EBML_ID_TIMECODESCALE:
											$info_entry[$subelement['id_name']] = getid3_lib::BigEndian2Int($subelement['data']);
											break;

case EBML_ID_DURATION:
											$info_entry[$subelement['id_name']] = getid3_lib::BigEndian2Float($subelement['data']);
											break;

case EBML_ID_DATEUTC:
											$info_entry[$subelement['id_name']]         = getid3_lib::BigEndian2Int($subelement['data']);
											$info_entry[$subelement['id_name'].'_unix'] = self::EBMLdate2unix($info_entry[$subelement['id_name']]);
											break;

case EBML_ID_SEGMENTUID:
										case EBML_ID_PREVUID:
										case EBML_ID_NEXTUID:
											$info_entry[$subelement['id_name']] = getid3_lib::trimNullByte($subelement['data']);
											break;

case EBML_ID_SEGMENTFAMILY:
											$info_entry[$subelement['id_name']][] = getid3_lib::trimNullByte($subelement['data']);
											break;

case EBML_ID_SEGMENTFILENAME:
										case EBML_ID_PREVFILENAME:
										case EBML_ID_NEXTFILENAME:
										case EBML_ID_TITLE:
										case EBML_ID_MUXINGAPP:
										case EBML_ID_WRITINGAPP:
											$info_entry[$subelement['id_name']] = getid3_lib::trimNullByte($subelement['data']);
											$info['matroska']['comments'][strtolower($subelement['id_name'])][] = $info_entry[$subelement['id_name']];
											break;

case EBML_ID_CHAPTERTRANSLATE:
											$chaptertranslate_entry = array();

while ($this->getEBMLelement($sub_subelement, $subelement['end'], true)) {
												switch ($sub_subelement['id']) {

case EBML_ID_CHAPTERTRANSLATEEDITIONUID:
														$chaptertranslate_entry[$sub_subelement['id_name']][] = getid3_lib::BigEndian2Int($sub_subelement['data']);
														break;

case EBML_ID_CHAPTERTRANSLATECODEC:
														$chaptertranslate_entry[$sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_subelement['data']);
														break;

case EBML_ID_CHAPTERTRANSLATEID:
														$chaptertranslate_entry[$sub_subelement['id_name']] = getid3_lib::trimNullByte($sub_subelement['data']);
														break;

default:
														$this->unhandledElement('info.chaptertranslate', __LINE__, $sub_subelement);
														break;
												}
											}
											$info_entry[$subelement['id_name']] = $chaptertranslate_entry;
											break;

default:
											$this->unhandledElement('info', __LINE__, $subelement);
											break;
									}
								}
								$info['matroska']['info'][] = $info_entry;
								break;

case EBML_ID_CUES: // A top-level element to speed seeking access. All entries are local to the segment. Should be mandatory for non "live" streams.
								if ($this->hide_clusters) { // do not parse cues if hide clusters is "ON" till they point to clusters anyway
									$this->current_offset = $element_data['end'];
									break;
								}
								$cues_entry = array();

while ($this->getEBMLelement($subelement, $element_data['end'])) {
									switch ($subelement['id']) {

case EBML_ID_CUEPOINT:
											$cuepoint_entry = array();

while ($this->getEBMLelement($sub_subelement, $subelement['end'], array(EBML_ID_CUETRACKPOSITIONS))) {
												switch ($sub_subelement['id']) {

case EBML_ID_CUETRACKPOSITIONS:
														$cuetrackpositions_entry = array();

while ($this->getEBMLelement($sub_sub_subelement, $sub_subelement['end'], true)) {
															switch ($sub_sub_subelement['id']) {

case EBML_ID_CUETRACK:
																case EBML_ID_CUECLUSTERPOSITION:
																case EBML_ID_CUEBLOCKNUMBER:
																case EBML_ID_CUECODECSTATE:
																	$cuetrackpositions_entry[$sub_sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_sub_subelement['data']);
																	break;

default:
																	$this->unhandledElement('cues.cuepoint.cuetrackpositions', __LINE__, $sub_sub_subelement);
																	break;
															}
														}
														$cuepoint_entry[$sub_subelement['id_name']][] = $cuetrackpositions_entry;
														break;

case EBML_ID_CUETIME:
														$cuepoint_entry[$sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_subelement['data']);
														break;

default:
														$this->unhandledElement('cues.cuepoint', __LINE__, $sub_subelement);
														break;
												}
											}
											$cues_entry[] = $cuepoint_entry;
											break;

default:
											$this->unhandledElement('cues', __LINE__, $subelement);
											break;
									}
								}
								$info['matroska']['cues'] = $cues_entry;
								break;

case EBML_ID_TAGS: // Element containing elements specific to Tracks/Chapters.
								$tags_entry = array();

while ($this->getEBMLelement($subelement, $element_data['end'], false)) {
									switch ($subelement['id']) {

case EBML_ID_TAG:
											$tag_entry = array();

while ($this->getEBMLelement($sub_subelement, $subelement['end'], false)) {
												switch ($sub_subelement['id']) {

case EBML_ID_TARGETS:
														$targets_entry = array();

while ($this->getEBMLelement($sub_sub_subelement, $sub_subelement['end'], true)) {
															switch ($sub_sub_subelement['id']) {

case EBML_ID_TARGETTYPEVALUE:
																	$targets_entry[$sub_sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_sub_subelement['data']);
																	$targets_entry[strtolower($sub_sub_subelement['id_name']).'_long'] = self::TargetTypeValue($targets_entry[$sub_sub_subelement['id_name']]);
																	break;

case EBML_ID_TARGETTYPE:
																	$targets_entry[$sub_sub_subelement['id_name']] = $sub_sub_subelement['data'];
																	break;

case EBML_ID_TAGTRACKUID:
																case EBML_ID_TAGEDITIONUID:
																case EBML_ID_TAGCHAPTERUID:
																case EBML_ID_TAGATTACHMENTUID:
																	$targets_entry[$sub_sub_subelement['id_name']][] = getid3_lib::PrintHexBytes($sub_sub_subelement['data'], true, false);
																	break;

default:
																	$this->unhandledElement('tags.tag.targets', __LINE__, $sub_sub_subelement);
																	break;
															}
														}
														$tag_entry[$sub_subelement['id_name']] = $targets_entry;
														break;

case EBML_ID_SIMPLETAG:
														$tag_entry[$sub_subelement['id_name']][] = $this->HandleEMBLSimpleTag($sub_subelement['end']);
														break;

default:
														$this->unhandledElement('tags.tag', __LINE__, $sub_subelement);
														break;
												}
											}
											$tags_entry[] = $tag_entry;
											break;

default:
											$this->unhandledElement('tags', __LINE__, $subelement);
											break;
									}
								}
								$info['matroska']['tags'] = $tags_entry;
								break;

case EBML_ID_ATTACHMENTS: // Contain attached files.

while ($this->getEBMLelement($subelement, $element_data['end'])) {
									switch ($subelement['id']) {

case EBML_ID_ATTACHEDFILE:
											$attachedfile_entry = array();

while ($this->getEBMLelement($sub_subelement, $subelement['end'], array(EBML_ID_FILEDATA))) {
												switch ($sub_subelement['id']) {

case EBML_ID_FILEDESCRIPTION:
													case EBML_ID_FILENAME:
													case EBML_ID_FILEMIMETYPE:
														$attachedfile_entry[$sub_subelement['id_name']] = $sub_subelement['data'];
														break;

case EBML_ID_FILEDATA:
														$attachedfile_entry['data_offset'] = $this->current_offset;
														$attachedfile_entry['data_length'] = $sub_subelement['length'];

$attachedfile_entry[$sub_subelement['id_name']] = $this->saveAttachment(
															$attachedfile_entry['FileName'],
															$attachedfile_entry['data_offset'],
															$attachedfile_entry['data_length']);

$this->current_offset = $sub_subelement['end'];
														break;

case EBML_ID_FILEUID:
														$attachedfile_entry[$sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_subelement['data']);
														break;

default:
														$this->unhandledElement('attachments.attachedfile', __LINE__, $sub_subelement);
														break;
												}
											}
											$info['matroska']['attachments'][] = $attachedfile_entry;
											break;

default:
											$this->unhandledElement('attachments', __LINE__, $subelement);
											break;
									}
								}
								break;

case EBML_ID_CHAPTERS:

while ($this->getEBMLelement($subelement, $element_data['end'])) {
									switch ($subelement['id']) {

case EBML_ID_EDITIONENTRY:
											$editionentry_entry = array();

while ($this->getEBMLelement($sub_subelement, $subelement['end'], array(EBML_ID_CHAPTERATOM))) {
												switch ($sub_subelement['id']) {

case EBML_ID_EDITIONUID:
														$editionentry_entry[$sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_subelement['data']);
														break;

case EBML_ID_EDITIONFLAGHIDDEN:
													case EBML_ID_EDITIONFLAGDEFAULT:
													case EBML_ID_EDITIONFLAGORDERED:
														$editionentry_entry[$sub_subelement['id_name']] = (bool)getid3_lib::BigEndian2Int($sub_subelement['data']);
														break;

case EBML_ID_CHAPTERATOM:
														$chapteratom_entry = array();

while ($this->getEBMLelement($sub_sub_subelement, $sub_subelement['end'], array(EBML_ID_CHAPTERTRACK, EBML_ID_CHAPTERDISPLAY))) {
															switch ($sub_sub_subelement['id']) {

case EBML_ID_CHAPTERSEGMENTUID:
																case EBML_ID_CHAPTERSEGMENTEDITIONUID:
																	$chapteratom_entry[$sub_sub_subelement['id_name']] = $sub_sub_subelement['data'];
																	break;

case EBML_ID_CHAPTERFLAGENABLED:
																case EBML_ID_CHAPTERFLAGHIDDEN:
																	$chapteratom_entry[$sub_sub_subelement['id_name']] = (bool)getid3_lib::BigEndian2Int($sub_sub_subelement['data']);
																	break;

case EBML_ID_CHAPTERUID:
																case EBML_ID_CHAPTERTIMESTART:
																case EBML_ID_CHAPTERTIMEEND:
																	$chapteratom_entry[$sub_sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_sub_subelement['data']);
																	break;

case EBML_ID_CHAPTERTRACK:
																	$chaptertrack_entry = array();

while ($this->getEBMLelement($sub_sub_sub_subelement, $sub_sub_subelement['end'], true)) {
																		switch ($sub_sub_sub_subelement['id']) {

case EBML_ID_CHAPTERTRACKNUMBER:
																				$chaptertrack_entry[$sub_sub_sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_sub_sub_subelement['data']);
																				break;

default:
																				$this->unhandledElement('chapters.editionentry.chapteratom.chaptertrack', __LINE__, $sub_sub_sub_subelement);
																				break;
																		}
																	}
																	$chapteratom_entry[$sub_sub_subelement['id_name']][] = $chaptertrack_entry;
																	break;

case EBML_ID_CHAPTERDISPLAY:
																	$chapterdisplay_entry = array();

while ($this->getEBMLelement($sub_sub_sub_subelement, $sub_sub_subelement['end'], true)) {
																		switch ($sub_sub_sub_subelement['id']) {

case EBML_ID_CHAPSTRING:
																			case EBML_ID_CHAPLANGUAGE:
																			case EBML_ID_CHAPCOUNTRY:
																				$chapterdisplay_entry[$sub_sub_sub_subelement['id_name']] = $sub_sub_sub_subelement['data'];
																				break;

default:
																				$this->unhandledElement('chapters.editionentry.chapteratom.chapterdisplay', __LINE__, $sub_sub_sub_subelement);
																				break;
																		}
																	}
																	$chapteratom_entry[$sub_sub_subelement['id_name']][] = $chapterdisplay_entry;
																	break;

default:
																	$this->unhandledElement('chapters.editionentry.chapteratom', __LINE__, $sub_sub_subelement);
																	break;
															}
														}
														$editionentry_entry[$sub_subelement['id_name']][] = $chapteratom_entry;
														break;

default:
														$this->unhandledElement('chapters.editionentry', __LINE__, $sub_subelement);
														break;
												}
											}
											$info['matroska']['chapters'][] = $editionentry_entry;
											break;

default:
											$this->unhandledElement('chapters', __LINE__, $subelement);
											break;
									}
								}
								break;

case EBML_ID_CLUSTER: // The lower level element containing the (monolithic) Block structure.
								$cluster_entry = array();

while ($this->getEBMLelement($subelement, $element_data['end'], array(EBML_ID_CLUSTERSILENTTRACKS, EBML_ID_CLUSTERBLOCKGROUP, EBML_ID_CLUSTERSIMPLEBLOCK))) {
									switch ($subelement['id']) {

case EBML_ID_CLUSTERTIMECODE:
										case EBML_ID_CLUSTERPOSITION:
										case EBML_ID_CLUSTERPREVSIZE:
											$cluster_entry[$subelement['id_name']] = getid3_lib::BigEndian2Int($subelement['data']);
											break;

case EBML_ID_CLUSTERSILENTTRACKS:
											$cluster_silent_tracks = array();

while ($this->getEBMLelement($sub_subelement, $subelement['end'], true)) {
												switch ($sub_subelement['id']) {

case EBML_ID_CLUSTERSILENTTRACKNUMBER:
														$cluster_silent_tracks[] = getid3_lib::BigEndian2Int($sub_subelement['data']);
														break;

default:
														$this->unhandledElement('cluster.silenttracks', __LINE__, $sub_subelement);
														break;
												}
											}
											$cluster_entry[$subelement['id_name']][] = $cluster_silent_tracks;
											break;

case EBML_ID_CLUSTERBLOCKGROUP:
											$cluster_block_group = array('offset' => $this->current_offset);

while ($this->getEBMLelement($sub_subelement, $subelement['end'], array(EBML_ID_CLUSTERBLOCK))) {
												switch ($sub_subelement['id']) {

case EBML_ID_CLUSTERBLOCK:
														$cluster_block_group[$sub_subelement['id_name']] = $this->HandleEMBLClusterBlock($sub_subelement, EBML_ID_CLUSTERBLOCK, $info);
														break;

case EBML_ID_CLUSTERREFERENCEPRIORITY: // unsigned-int
													case EBML_ID_CLUSTERBLOCKDURATION:     // unsigned-int
														$cluster_block_group[$sub_subelement['id_name']] = getid3_lib::BigEndian2Int($sub_subelement['data']);
														break;

case EBML_ID_CLUSTERREFERENCEBLOCK:    // signed-int
														$cluster_block_group[$sub_subelement['id_name']][] = getid3_lib::BigEndian2Int($sub_subelement['data'], false, true);
														break;

case EBML_ID_CLUSTERCODECSTATE:
														$cluster_block_group[$sub_subelement['id_name']] = getid3_lib::trimNullByte($sub_subelement['data']);
														break;

default:
														$this->unhandledElement('clusters.blockgroup', __LINE__, $sub_subelement);
														break;
												}
											}
											$cluster_entry[$subelement['id_name']][] = $cluster_block_group;
											break;

case EBML_ID_CLUSTERSIMPLEBLOCK:
											$cluster_entry[$subelement['id_name']][] = $this->HandleEMBLClusterBlock($subelement, EBML_ID_CLUSTERSIMPLEBLOCK, $info);
											break;

default:
											$this->unhandledElement('cluster', __LINE__, $subelement);
											break;
									}
									$this->current_offset = $subelement['end'];
								}
								if (!$this->hide_clusters) {
									$info['matroska']['cluster'][] = $cluster_entry;
								}

// check to see if all the data we need exists already, if so, break out of the loop
								if (!$this->parse_whole_file) {
									if (isset($info['matroska']['info']) && is_array($info['matroska']['info'])) {
										if (isset($info['matroska']['tracks']['tracks']) && is_array($info['matroska']['tracks']['tracks'])) {
											if (count($info['matroska']['track_data_offsets']) == count($info['matroska']['tracks']['tracks'])) {
												return;
											}
										}
									}
								}
								break;

default:
								$this->unhandledElement('segment', __LINE__, $element_data);
								break;
						}
					}
					break;

default:
					$this->unhandledElement('root', __LINE__, $top_element);
					break;
			}
		}
	}

/**
	 * @param int $min_data
	 *
	 * @return bool
	 */
	private function EnsureBufferHasEnoughData($min_data=1024) {
		if (($this->current_offset - $this->EBMLbuffer_offset) >= ($this->EBMLbuffer_length - $min_data)) {
			$read_bytes = max($min_data, $this->getid3->fread_buffer_size());

try {
				$this->fseek($this->current_offset);
				$this->EBMLbuffer_offset = $this->current_offset;
				$this->EBMLbuffer        = $this->fread($read_bytes);
				$this->EBMLbuffer_length = strlen($this->EBMLbuffer);
			} catch (getid3_exception $e) {
				$this->warning('EBML parser: '.$e->getMessage());
				return false;
			}

if ($this->EBMLbuffer_length == 0 && $this->feof()) {
				return $this->error('EBML parser: ran out of file at offset '.$this->current_offset);
			}
		}
		return true;
	}

/**
	 * @return int|float|false
	 */
	private function readEBMLint() {
		$actual_offset = $this->current_offset - $this->EBMLbuffer_offset;

// get length of integer
		$first_byte_int = ord($this->EBMLbuffer[$actual_offset]);
		if       (0x80 & $first_byte_int) {
			$length = 1;
		} elseif (0x40 & $first_byte_int) {
			$length = 2;
		} elseif (0x20 & $first_byte_int) {
			$length = 3;
		} elseif (0x10 & $first_byte_int) {
			$length = 4;
		} elseif (0x08 & $first_byte_int) {
			$length = 5;
		} elseif (0x04 & $first_byte_int) {
			$length = 6;
		} elseif (0x02 & $first_byte_int) {
			$length = 7;
		} elseif (0x01 & $first_byte_int) {
			$length = 8;
		} else {
			throw new Exception('invalid EBML integer (leading 0x00) at '.$this->current_offset);
		}

// read
		$int_value = self::EBML2Int(substr($this->EBMLbuffer, $actual_offset, $length));
		$this->current_offset += $length;

return $int_value;
	}

/**
	 * @param int  $length
	 * @param bool $check_buffer
	 *
	 * @return string|false
	 */
	private function readEBMLelementData($length, $check_buffer=false) {
		if ($check_buffer && !$this->EnsureBufferHasEnoughData($length)) {
			return false;
		}
		$data = substr($this->EBMLbuffer, $this->current_offset - $this->EBMLbuffer_offset, $length);
		$this->current_offset += $length;
		return $data;
	}

/**
	 * @param array      $element
	 * @param int        $parent_end
	 * @param array|bool $get_data
	 *
	 * @return bool
	 */
	private function getEBMLelement(&$element, $parent_end, $get_data=false) {
		if ($this->current_offset >= $parent_end) {
			return false;
		}

if (!$this->EnsureBufferHasEnoughData()) {
			$this->current_offset = PHP_INT_MAX; // do not exit parser right now, allow to finish current loop to gather maximum information
			return false;
		}

$element = array();

// set offset
		$element['offset'] = $this->current_offset;

// get ID
		$element['id'] = $this->readEBMLint();

// get name
		$element['id_name'] = self::EBMLidName($element['id']);

// get length
		$element['length'] = $this->readEBMLint();

// get end offset
		$element['end'] = $this->current_offset + $element['length'];

// get raw data
		$dont_parse = (in_array($element['id'], $this->unuseful_elements) || $element['id_name'] == dechex($element['id']));
		if (($get_data === true || (is_array($get_data) && !in_array($element['id'], $get_data))) && !$dont_parse) {
			$element['data'] = $this->readEBMLelementData($element['length'], $element);
		}

return true;
	}

/**
	 * @param string $type
	 * @param int    $line
	 * @param array  $element
	 */
	private function unhandledElement($type, $line, $element) {
		// warn only about unknown and missed elements, not about unuseful
		if (!in_array($element['id'], $this->unuseful_elements)) {
			$this->warning('Unhandled '.$type.' element ['.basename(__FILE__).':'.$line.'] ('.$element['id'].'::'.$element['id_name'].' ['.$element['length'].' bytes]) at '.$element['offset']);
		}

// increase offset for unparsed elements
		if (!isset($element['data'])) {
			$this->current_offset = $element['end'];
		}
	}

/**
	 * @param array $SimpleTagArray
	 *
	 * @return bool
	 */
	private function ExtractCommentsSimpleTag($SimpleTagArray) {
		if (!empty($SimpleTagArray['SimpleTag'])) {
			foreach ($SimpleTagArray['SimpleTag'] as $SimpleTagKey => $SimpleTagData) {
				if (!empty($SimpleTagData['TagName']) && !empty($SimpleTagData['TagString'])) {
					$this->getid3->info['matroska']['comments'][strtolower($SimpleTagData['TagName'])][] = $SimpleTagData['TagString'];
				}
				if (!empty($SimpleTagData['SimpleTag'])) {
					$this->ExtractCommentsSimpleTag($SimpleTagData);
				}
			}
		}

return true;
	}

/**
	 * @param int $parent_end
	 *
	 * @return array
	 */
	private function HandleEMBLSimpleTag($parent_end) {
		$simpletag_entry = array();

while ($this->getEBMLelement($element, $parent_end, array(EBML_ID_SIMPLETAG))) {
			switch ($element['id']) {

case EBML_ID_TAGNAME:
				case EBML_ID_TAGLANGUAGE:
				case EBML_ID_TAGSTRING:
				case EBML_ID_TAGBINARY:
					$simpletag_entry[$element['id_name']] = $element['data'];
					break;

case EBML_ID_SIMPLETAG:
					$simpletag_entry[$element['id_name']][] = $this->HandleEMBLSimpleTag($element['end']);
					break;

case EBML_ID_TAGDEFAULT:
					$simpletag_entry[$element['id_name']] = (bool)getid3_lib::BigEndian2Int($element['data']);
					break;

default:
					$this->unhandledElement('tag.simpletag', __LINE__, $element);
					break;
			}
		}

return $simpletag_entry;
	}

/**
	 * @param array $element
	 * @param int   $block_type
	 * @param array $info
	 *
	 * @return array
	 */
	private function HandleEMBLClusterBlock($element, $block_type, &$info) {
		// http://www.matroska.org/technical/specs/index.html#block_structure
		// http://www.matroska.org/technical/specs/index.html#simpleblock_structure

$block_data = array();
		$block_data['tracknumber'] = $this->readEBMLint();
		$block_data['timecode']    = getid3_lib::BigEndian2Int($this->readEBMLelementData(2), false, true);
		$block_data['flags_raw']   = getid3_lib::BigEndian2Int($this->readEBMLelementData(1));

if ($block_type == EBML_ID_CLUSTERSIMPLEBLOCK) {
			$block_data['flags']['keyframe']  = (($block_data['flags_raw'] & 0x80) >> 7);
			//$block_data['flags']['reserved1'] = (($block_data['flags_raw'] & 0x70) >> 4);
		}
		else {
			//$block_data['flags']['reserved1'] = (($block_data['flags_raw'] & 0xF0) >> 4);
		}
		$block_data['flags']['invisible'] = (bool)(($block_data['flags_raw'] & 0x08) >> 3);
		$block_data['flags']['lacing']    =       (($block_data['flags_raw'] & 0x06) >> 1);  // 00=no lacing; 01=Xiph lacing; 11=EBML lacing; 10=fixed-size lacing
		if ($block_type == EBML_ID_CLUSTERSIMPLEBLOCK) {
			$block_data['flags']['discardable'] = (($block_data['flags_raw'] & 0x01));
		}
		else {
			//$block_data['flags']['reserved2'] = (($block_data['flags_raw'] & 0x01) >> 0);
		}
		$block_data['flags']['lacing_type'] = self::BlockLacingType($block_data['flags']['lacing']);

// Lace (when lacing bit is set)
		if ($block_data['flags']['lacing'] > 0) {
			$block_data['lace_frames'] = getid3_lib::BigEndian2Int($this->readEBMLelementData(1)) + 1; // Number of frames in the lace-1 (uint8)
			if ($block_data['flags']['lacing'] != 0x02) {
				for ($i = 1; $i < $block_data['lace_frames']; $i ++) { // Lace-coded size of each frame of the lace, except for the last one (multiple uint8). *This is not used with Fixed-size lacing as it is calculated automatically from (total size of lace) / (number of frames in lace).
					if ($block_data['flags']['lacing'] == 0x03) { // EBML lacing
						$block_data['lace_frames_size'][$i] = $this->readEBMLint(); // TODO: read size correctly, calc size for the last frame. For now offsets are deteminded OK with readEBMLint() and that's the most important thing.
					}
					else { // Xiph lacing
						$block_data['lace_frames_size'][$i] = 0;
						do {
							$size = getid3_lib::BigEndian2Int($this->readEBMLelementData(1));
							$block_data['lace_frames_size'][$i] += $size;
						}
						while ($size == 255);
					}
				}
				if ($block_data['flags']['lacing'] == 0x01) { // calc size of the last frame only for Xiph lacing, till EBML sizes are now anyway determined incorrectly
					$block_data['lace_frames_size'][] = $element['end'] - $this->current_offset - array_sum($block_data['lace_frames_size']);
				}
			}
		}

if (!isset($info['matroska']['track_data_offsets'][$block_data['tracknumber']])) {
			$info['matroska']['track_data_offsets'][$block_data['tracknumber']]['offset'] = $this->current_offset;
			$info['matroska']['track_data_offsets'][$block_data['tracknumber']]['length'] = $element['end'] - $this->current_offset;
			//$info['matroska']['track_data_offsets'][$block_data['tracknumber']]['total_length'] = 0;
		}
		//$info['matroska']['track_data_offsets'][$block_data['tracknumber']]['total_length'] += $info['matroska']['track_data_offsets'][$block_data['tracknumber']]['length'];
		//$info['matroska']['track_data_offsets'][$block_data['tracknumber']]['duration']      = $block_data['timecode'] * ((isset($info['matroska']['info'][0]['TimecodeScale']) ? $info['matroska']['info'][0]['TimecodeScale'] : 1000000) / 1000000000);

// set offset manually
		$this->current_offset = $element['end'];

return $block_data;
	}

/**
	 * @param string $EBMLstring
	 *
	 * @return int|float|false
	 */
	private static function EBML2Int($EBMLstring) {
		// http://matroska.org/specs/

// Element ID coded with an UTF-8 like system:
		// 1xxx xxxx                                  - Class A IDs (2^7 -2 possible values) (base 0x8X)
		// 01xx xxxx  xxxx xxxx                       - Class B IDs (2^14-2 possible values) (base 0x4X 0xXX)
		// 001x xxxx  xxxx xxxx  xxxx xxxx            - Class C IDs (2^21-2 possible values) (base 0x2X 0xXX 0xXX)
		// 0001 xxxx  xxxx xxxx  xxxx xxxx  xxxx xxxx - Class D IDs (2^28-2 possible values) (base 0x1X 0xXX 0xXX 0xXX)
		// Values with all x at 0 and 1 are reserved (hence the -2).

// Data size, in octets, is also coded with an UTF-8 like system :
		// 1xxx xxxx                                                                              - value 0 to  2^7-2
		// 01xx xxxx  xxxx xxxx                                                                   - value 0 to 2^14-2
		// 001x xxxx  xxxx xxxx  xxxx xxxx                                                        - value 0 to 2^21-2
		// 0001 xxxx  xxxx xxxx  xxxx xxxx  xxxx xxxx                                             - value 0 to 2^28-2
		// 0000 1xxx  xxxx xxxx  xxxx xxxx  xxxx xxxx  xxxx xxxx                                  - value 0 to 2^35-2
		// 0000 01xx  xxxx xxxx  xxxx xxxx  xxxx xxxx  xxxx xxxx  xxxx xxxx                       - value 0 to 2^42-2
		// 0000 001x  xxxx xxxx  xxxx xxxx  xxxx xxxx  xxxx xxxx  xxxx xxxx  xxxx xxxx            - value 0 to 2^49-2
		// 0000 0001  xxxx xxxx  xxxx xxxx  xxxx xxxx  xxxx xxxx  xxxx xxxx  xxxx xxxx  xxxx xxxx - value 0 to 2^56-2

$first_byte_int = ord($EBMLstring[0]);
		if (0x80 & $first_byte_int) {
			$EBMLstring[0] = chr($first_byte_int & 0x7F);
		} elseif (0x40 & $first_byte_int) {
			$EBMLstring[0] = chr($first_byte_int & 0x3F);
		} elseif (0x20 & $first_byte_int) {
			$EBMLstring[0] = chr($first_byte_int & 0x1F);
		} elseif (0x10 & $first_byte_int) {
			$EBMLstring[0] = chr($first_byte_int & 0x0F);
		} elseif (0x08 & $first_byte_int) {
			$EBMLstring[0] = chr($first_byte_int & 0x07);
		} elseif (0x04 & $first_byte_int) {
			$EBMLstring[0] = chr($first_byte_int & 0x03);
		} elseif (0x02 & $first_byte_int) {
			$EBMLstring[0] = chr($first_byte_int & 0x01);
		} elseif (0x01 & $first_byte_int) {
			$EBMLstring[0] = chr($first_byte_int & 0x00);
		}

return getid3_lib::BigEndian2Int($EBMLstring);
	}

/**
	 * @param int $EBMLdatestamp
	 *
	 * @return float
	 */
	private static function EBMLdate2unix($EBMLdatestamp) {
		// Date - signed 8 octets integer in nanoseconds with 0 indicating the precise beginning of the millennium (at 2001-01-01T00:00:00,000000000 UTC)
		// 978307200 == mktime(0, 0, 0, 1, 1, 2001) == January 1, 2001 12:00:00am UTC
		return round(($EBMLdatestamp / 1000000000) + 978307200);
	}

/**
	 * @param int $target_type
	 *
	 * @return string|int
	 */
	public static function TargetTypeValue($target_type) {
		// http://www.matroska.org/technical/specs/tagging/index.html
		static $TargetTypeValue = array();
		if (empty($TargetTypeValue)) {
			$TargetTypeValue[10] = 'A: ~ V:shot';                                           // the lowest hierarchy found in music or movies
			$TargetTypeValue[20] = 'A:subtrack/part/movement ~ V:scene';                    // corresponds to parts of a track for audio (like a movement)
			$TargetTypeValue[30] = 'A:track/song ~ V:chapter';                              // the common parts of an album or a movie
			$TargetTypeValue[40] = 'A:part/session ~ V:part/session';                       // when an album or episode has different logical parts
			$TargetTypeValue[50] = 'A:album/opera/concert ~ V:movie/episode/concert';       // the most common grouping level of music and video (equals to an episode for TV series)
			$TargetTypeValue[60] = 'A:edition/issue/volume/opus ~ V:season/sequel/volume';  // a list of lower levels grouped together
			$TargetTypeValue[70] = 'A:collection ~ V:collection';                           // the high hierarchy consisting of many different lower items
		}
		return (isset($TargetTypeValue[$target_type]) ? $TargetTypeValue[$target_type] : $target_type);
	}

/**
	 * @param int $lacingtype
	 *
	 * @return string|int
	 */
	public static function BlockLacingType($lacingtype) {
		// http://matroska.org/technical/specs/index.html#block_structure
		static $BlockLacingType = array();
		if (empty($BlockLacingType)) {
			$BlockLacingType[0x00] = 'no lacing';
			$BlockLacingType[0x01] = 'Xiph lacing';
			$BlockLacingType[0x02] = 'fixed-size lacing';
			$BlockLacingType[0x03] = 'EBML lacing';
		}
		return (isset($BlockLacingType[$lacingtype]) ? $BlockLacingType[$lacingtype] : $lacingtype);
	}

/**
	 * @param string $codecid
	 *
	 * @return string
	 */
	public static function CodecIDtoCommonName($codecid) {
		// http://www.matroska.org/technical/specs/codecid/index.html
		static $CodecIDlist = array();
		if (empty($CodecIDlist)) {
			$CodecIDlist['A_AAC']            = 'aac';
			$CodecIDlist['A_AAC/MPEG2/LC']   = 'aac';
			$CodecIDlist['A_AC3']            = 'ac3';
			$CodecIDlist['A_EAC3']           = 'eac3';
			$CodecIDlist['A_DTS']            = 'dts';
			$CodecIDlist['A_FLAC']           = 'flac';
			$CodecIDlist['A_MPEG/L1']        = 'mp1';
			$CodecIDlist['A_MPEG/L2']        = 'mp2';
			$CodecIDlist['A_MPEG/L3']        = 'mp3';
			$CodecIDlist['A_PCM/INT/LIT']    = 'pcm';       // PCM Integer Little Endian
			$CodecIDlist['A_PCM/INT/BIG']    = 'pcm';       // PCM Integer Big Endian
			$CodecIDlist['A_QUICKTIME/QDMC'] = 'quicktime'; // Quicktime: QDesign Music
			$CodecIDlist['A_QUICKTIME/QDM2'] = 'quicktime'; // Quicktime: QDesign Music v2
			$CodecIDlist['A_VORBIS']         = 'vorbis';
			$CodecIDlist['V_MPEG1']          = 'mpeg';
			$CodecIDlist['V_THEORA']         = 'theora';
			$CodecIDlist['V_REAL/RV40']      = 'real';
			$CodecIDlist['V_REAL/RV10']      = 'real';
			$CodecIDlist['V_REAL/RV20']      = 'real';
			$CodecIDlist['V_REAL/RV30']      = 'real';
			$CodecIDlist['V_QUICKTIME']      = 'quicktime'; // Quicktime
			$CodecIDlist['V_MPEG4/ISO/AP']   = 'mpeg4';
			$CodecIDlist['V_MPEG4/ISO/ASP']  = 'mpeg4';
			$CodecIDlist['V_MPEG4/ISO/AVC']  = 'h264';
			$CodecIDlist['V_MPEG4/ISO/SP']   = 'mpeg4';
			$CodecIDlist['V_VP8']            = 'vp8';
			$CodecIDlist['V_MS/VFW/FOURCC']  = 'vcm'; // Microsoft (TM) Video Codec Manager (VCM)
			$CodecIDlist['A_MS/ACM']         = 'acm'; // Microsoft (TM) Audio Codec Manager (ACM)
		}
		return (isset($CodecIDlist[$codecid]) ? $CodecIDlist[$codecid] : $codecid);
	}

/**
	 * @param int $value
	 *
	 * @return string
	 */
	private static function EBMLidName($value) {
		static $EBMLidList = array();
		if (empty($EBMLidList)) {
			$EBMLidList[EBML_ID_ASPECTRATIOTYPE]            = 'AspectRatioType';
			$EBMLidList[EBML_ID_ATTACHEDFILE]               = 'AttachedFile';
			$EBMLidList[EBML_ID_ATTACHMENTLINK]             = 'AttachmentLink';
			$EBMLidList[EBML_ID_ATTACHMENTS]                = 'Attachments';
			$EBMLidList[EBML_ID_AUDIO]                      = 'Audio';
			$EBMLidList[EBML_ID_BITDEPTH]                   = 'BitDepth';
			$EBMLidList[EBML_ID_CHANNELPOSITIONS]           = 'ChannelPositions';
			$EBMLidList[EBML_ID_CHANNELS]                   = 'Channels';
			$EBMLidList[EBML_ID_CHAPCOUNTRY]                = 'ChapCountry';
			$EBMLidList[EBML_ID_CHAPLANGUAGE]               = 'ChapLanguage';
			$EBMLidList[EBML_ID_CHAPPROCESS]                = 'ChapProcess';
			$EBMLidList[EBML_ID_CHAPPROCESSCODECID]         = 'ChapProcessCodecID';
			$EBMLidList[EBML_ID_CHAPPROCESSCOMMAND]         = 'ChapProcessCommand';
			$EBMLidList[EBML_ID_CHAPPROCESSDATA]            = 'ChapProcessData';
			$EBMLidList[EBML_ID_CHAPPROCESSPRIVATE]         = 'ChapProcessPrivate';
			$EBMLidList[EBML_ID_CHAPPROCESSTIME]            = 'ChapProcessTime';
			$EBMLidList[EBML_ID_CHAPSTRING]                 = 'ChapString';
			$EBMLidList[EBML_ID_CHAPTERATOM]                = 'ChapterAtom';
			$EBMLidList[EBML_ID_CHAPTERDISPLAY]             = 'ChapterDisplay';
			$EBMLidList[EBML_ID_CHAPTERFLAGENABLED]         = 'ChapterFlagEnabled';
			$EBMLidList[EBML_ID_CHAPTERFLAGHIDDEN]          = 'ChapterFlagHidden';
			$EBMLidList[EBML_ID_CHAPTERPHYSICALEQUIV]       = 'ChapterPhysicalEquiv';
			$EBMLidList[EBML_ID_CHAPTERS]                   = 'Chapters';
			$EBMLidList[EBML_ID_CHAPTERSEGMENTEDITIONUID]   = 'ChapterSegmentEditionUID';
			$EBMLidList[EBML_ID_CHAPTERSEGMENTUID]          = 'ChapterSegmentUID';
			$EBMLidList[EBML_ID_CHAPTERTIMEEND]             = 'ChapterTimeEnd';
			$EBMLidList[EBML_ID_CHAPTERTIMESTART]           = 'ChapterTimeStart';
			$EBMLidList[EBML_ID_CHAPTERTRACK]               = 'ChapterTrack';
			$EBMLidList[EBML_ID_CHAPTERTRACKNUMBER]         = 'ChapterTrackNumber';
			$EBMLidList[EBML_ID_CHAPTERTRANSLATE]           = 'ChapterTranslate';
			$EBMLidList[EBML_ID_CHAPTERTRANSLATECODEC]      = 'ChapterTranslateCodec';
			$EBMLidList[EBML_ID_CHAPTERTRANSLATEEDITIONUID] = 'ChapterTranslateEditionUID';
			$EBMLidList[EBML_ID_CHAPTERTRANSLATEID]         = 'ChapterTranslateID';
			$EBMLidList[EBML_ID_CHAPTERUID]                 = 'ChapterUID';
			$EBMLidList[EBML_ID_CLUSTER]                    = 'Cluster';
			$EBMLidList[EBML_ID_CLUSTERBLOCK]               = 'ClusterBlock';
			$EBMLidList[EBML_ID_CLUSTERBLOCKADDID]          = 'ClusterBlockAddID';
			$EBMLidList[EBML_ID_CLUSTERBLOCKADDITIONAL]     = 'ClusterBlockAdditional';
			$EBMLidList[EBML_ID_CLUSTERBLOCKADDITIONID]     = 'ClusterBlockAdditionID';
			$EBMLidList[EBML_ID_CLUSTERBLOCKADDITIONS]      = 'ClusterBlockAdditions';
			$EBMLidList[EBML_ID_CLUSTERBLOCKDURATION]       = 'ClusterBlockDuration';
			$EBMLidList[EBML_ID_CLUSTERBLOCKGROUP]          = 'ClusterBlockGroup';
			$EBMLidList[EBML_ID_CLUSTERBLOCKMORE]           = 'ClusterBlockMore';
			$EBMLidList[EBML_ID_CLUSTERBLOCKVIRTUAL]        = 'ClusterBlockVirtual';
			$EBMLidList[EBML_ID_CLUSTERCODECSTATE]          = 'ClusterCodecState';
			$EBMLidList[EBML_ID_CLUSTERDELAY]               = 'ClusterDelay';
			$EBMLidList[EBML_ID_CLUSTERDURATION]            = 'ClusterDuration';
			$EBMLidList[EBML_ID_CLUSTERENCRYPTEDBLOCK]      = 'ClusterEncryptedBlock';
			$EBMLidList[EBML_ID_CLUSTERFRAMENUMBER]         = 'ClusterFrameNumber';
			$EBMLidList[EBML_ID_CLUSTERLACENUMBER]          = 'ClusterLaceNumber';
			$EBMLidList[EBML_ID_CLUSTERPOSITION]            = 'ClusterPosition';
			$EBMLidList[EBML_ID_CLUSTERPREVSIZE]            = 'ClusterPrevSize';
			$EBMLidList[EBML_ID_CLUSTERREFERENCEBLOCK]      = 'ClusterReferenceBlock';
			$EBMLidList[EBML_ID_CLUSTERREFERENCEPRIORITY]   = 'ClusterReferencePriority';
			$EBMLidList[EBML_ID_CLUSTERREFERENCEVIRTUAL]    = 'ClusterReferenceVirtual';
			$EBMLidList[EBML_ID_CLUSTERSILENTTRACKNUMBER]   = 'ClusterSilentTrackNumber';
			$EBMLidList[EBML_ID_CLUSTERSILENTTRACKS]        = 'ClusterSilentTracks';
			$EBMLidList[EBML_ID_CLUSTERSIMPLEBLOCK]         = 'ClusterSimpleBlock';
			$EBMLidList[EBML_ID_CLUSTERTIMECODE]            = 'ClusterTimecode';
			$EBMLidList[EBML_ID_CLUSTERTIMESLICE]           = 'ClusterTimeSlice';
			$EBMLidList[EBML_ID_CODECDECODEALL]             = 'CodecDecodeAll';
			$EBMLidList[EBML_ID_CODECDOWNLOADURL]           = 'CodecDownloadURL';
			$EBMLidList[EBML_ID_CODECID]                    = 'CodecID';
			$EBMLidList[EBML_ID_CODECINFOURL]               = 'CodecInfoURL';
			$EBMLidList[EBML_ID_CODECNAME]                  = 'CodecName';
			$EBMLidList[EBML_ID_CODECPRIVATE]               = 'CodecPrivate';
			$EBMLidList[EBML_ID_CODECSETTINGS]              = 'CodecSettings';
			$EBMLidList[EBML_ID_COLOURSPACE]                = 'ColourSpace';
			$EBMLidList[EBML_ID_CONTENTCOMPALGO]            = 'ContentCompAlgo';
			$EBMLidList[EBML_ID_CONTENTCOMPRESSION]         = 'ContentCompression';
			$EBMLidList[EBML_ID_CONTENTCOMPSETTINGS]        = 'ContentCompSettings';
			$EBMLidList[EBML_ID_CONTENTENCALGO]             = 'ContentEncAlgo';
			$EBMLidList[EBML_ID_CONTENTENCKEYID]            = 'ContentEncKeyID';
			$EBMLidList[EBML_ID_CONTENTENCODING]            = 'ContentEncoding';
			$EBMLidList[EBML_ID_CONTENTENCODINGORDER]       = 'ContentEncodingOrder';
			$EBMLidList[EBML_ID_CONTENTENCODINGS]           = 'ContentEncodings';
			$EBMLidList[EBML_ID_CONTENTENCODINGSCOPE]       = 'ContentEncodingScope';
			$EBMLidList[EBML_ID_CONTENTENCODINGTYPE]        = 'ContentEncodingType';
			$EBMLidList[EBML_ID_CONTENTENCRYPTION]          = 'ContentEncryption';
			$EBMLidList[EBML_ID_CONTENTSIGALGO]             = 'ContentSigAlgo';
			$EBMLidList[EBML_ID_CONTENTSIGHASHALGO]         = 'ContentSigHashAlgo';
			$EBMLidList[EBML_ID_CONTENTSIGKEYID]            = 'ContentSigKeyID';
			$EBMLidList[EBML_ID_CONTENTSIGNATURE]           = 'ContentSignature';
			$EBMLidList[EBML_ID_CRC32]                      = 'CRC32';
			$EBMLidList[EBML_ID_CUEBLOCKNUMBER]             = 'CueBlockNumber';
			$EBMLidList[EBML_ID_CUECLUSTERPOSITION]         = 'CueClusterPosition';
			$EBMLidList[EBML_ID_CUECODECSTATE]              = 'CueCodecState';
			$EBMLidList[EBML_ID_CUEPOINT]                   = 'CuePoint';
			$EBMLidList[EBML_ID_CUEREFCLUSTER]              = 'CueRefCluster';
			$EBMLidList[EBML_ID_CUEREFCODECSTATE]           = 'CueRefCodecState';
			$EBMLidList[EBML_ID_CUEREFERENCE]               = 'CueReference';
			$EBMLidList[EBML_ID_CUEREFNUMBER]               = 'CueRefNumber';
			$EBMLidList[EBML_ID_CUEREFTIME]                 = 'CueRefTime';
			$EBMLidList[EBML_ID_CUES]                       = 'Cues';
			$EBMLidList[EBML_ID_CUETIME]                    = 'CueTime';
			$EBMLidList[EBML_ID_CUETRACK]                   = 'CueTrack';
			$EBMLidList[EBML_ID_CUETRACKPOSITIONS]          = 'CueTrackPositions';
			$EBMLidList[EBML_ID_DATEUTC]                    = 'DateUTC';
			$EBMLidList[EBML_ID_DEFAULTDURATION]            = 'DefaultDuration';
			$EBMLidList[EBML_ID_DISPLAYHEIGHT]              = 'DisplayHeight';
			$EBMLidList[EBML_ID_DISPLAYUNIT]                = 'DisplayUnit';
			$EBMLidList[EBML_ID_DISPLAYWIDTH]               = 'DisplayWidth';
			$EBMLidList[EBML_ID_DOCTYPE]                    = 'DocType';
			$EBMLidList[EBML_ID_DOCTYPEREADVERSION]         = 'DocTypeReadVersion';
			$EBMLidList[EBML_ID_DOCTYPEVERSION]             = 'DocTypeVersion';
			$EBMLidList[EBML_ID_DURATION]                   = 'Duration';
			$EBMLidList[EBML_ID_EBML]                       = 'EBML';
			$EBMLidList[EBML_ID_EBMLMAXIDLENGTH]            = 'EBMLMaxIDLength';
			$EBMLidList[EBML_ID_EBMLMAXSIZELENGTH]          = 'EBMLMaxSizeLength';
			$EBMLidList[EBML_ID_EBMLREADVERSION]            = 'EBMLReadVersion';
			$EBMLidList[EBML_ID_EBMLVERSION]                = 'EBMLVersion';
			$EBMLidList[EBML_ID_EDITIONENTRY]               = 'EditionEntry';
			$EBMLidList[EBML_ID_EDITIONFLAGDEFAULT]         = 'EditionFlagDefault';
			$EBMLidList[EBML_ID_EDITIONFLAGHIDDEN]          = 'EditionFlagHidden';
			$EBMLidList[EBML_ID_EDITIONFLAGORDERED]         = 'EditionFlagOrdered';
			$EBMLidList[EBML_ID_EDITIONUID]                 = 'EditionUID';
			$EBMLidList[EBML_ID_FILEDATA]                   = 'FileData';
			$EBMLidList[EBML_ID_FILEDESCRIPTION]            = 'FileDescription';
			$EBMLidList[EBML_ID_FILEMIMETYPE]               = 'FileMimeType';
			$EBMLidList[EBML_ID_FILENAME]                   = 'FileName';
			$EBMLidList[EBML_ID_FILEREFERRAL]               = 'FileReferral';
			$EBMLidList[EBML_ID_FILEUID]                    = 'FileUID';
			$EBMLidList[EBML_ID_FLAGDEFAULT]                = 'FlagDefault';
			$EBMLidList[EBML_ID_FLAGENABLED]                = 'FlagEnabled';
			$EBMLidList[EBML_ID_FLAGFORCED]                 = 'FlagForced';
			$EBMLidList[EBML_ID_FLAGINTERLACED]             = 'FlagInterlaced';
			$EBMLidList[EBML_ID_FLAGLACING]                 = 'FlagLacing';
			$EBMLidList[EBML_ID_GAMMAVALUE]                 = 'GammaValue';
			$EBMLidList[EBML_ID_INFO]                       = 'Info';
			$EBMLidList[EBML_ID_LANGUAGE]                   = 'Language';
			$EBMLidList[EBML_ID_MAXBLOCKADDITIONID]         = 'MaxBlockAdditionID';
			$EBMLidList[EBML_ID_MAXCACHE]                   = 'MaxCache';
			$EBMLidList[EBML_ID_MINCACHE]                   = 'MinCache';
			$EBMLidList[EBML_ID_MUXINGAPP]                  = 'MuxingApp';
			$EBMLidList[EBML_ID_NAME]                       = 'Name';
			$EBMLidList[EBML_ID_NEXTFILENAME]               = 'NextFilename';
			$EBMLidList[EBML_ID_NEXTUID]                    = 'NextUID';
			$EBMLidList[EBML_ID_OUTPUTSAMPLINGFREQUENCY]    = 'OutputSamplingFrequency';
			$EBMLidList[EBML_ID_PIXELCROPBOTTOM]            = 'PixelCropBottom';
			$EBMLidList[EBML_ID_PIXELCROPLEFT]              = 'PixelCropLeft';
			$EBMLidList[EBML_ID_PIXELCROPRIGHT]             = 'PixelCropRight';
			$EBMLidList[EBML_ID_PIXELCROPTOP]               = 'PixelCropTop';
			$EBMLidList[EBML_ID_PIXELHEIGHT]                = 'PixelHeight';
			$EBMLidList[EBML_ID_PIXELWIDTH]                 = 'PixelWidth';
			$EBMLidList[EBML_ID_PREVFILENAME]               = 'PrevFilename';
			$EBMLidList[EBML_ID_PREVUID]                    = 'PrevUID';
			$EBMLidList[EBML_ID_SAMPLINGFREQUENCY]          = 'SamplingFrequency';
			$EBMLidList[EBML_ID_SEEK]                       = 'Seek';
			$EBMLidList[EBML_ID_SEEKHEAD]                   = 'SeekHead';
			$EBMLidList[EBML_ID_SEEKID]                     = 'SeekID';
			$EBMLidList[EBML_ID_SEEKPOSITION]               = 'SeekPosition';
			$EBMLidList[EBML_ID_SEGMENT]                    = 'Segment';
			$EBMLidList[EBML_ID_SEGMENTFAMILY]              = 'SegmentFamily';
			$EBMLidList[EBML_ID_SEGMENTFILENAME]            = 'SegmentFilename';
			$EBMLidList[EBML_ID_SEGMENTUID]                 = 'SegmentUID';
			$EBMLidList[EBML_ID_SIMPLETAG]                  = 'SimpleTag';
			$EBMLidList[EBML_ID_CLUSTERSLICES]              = 'ClusterSlices';
			$EBMLidList[EBML_ID_STEREOMODE]                 = 'StereoMode';
			$EBMLidList[EBML_ID_OLDSTEREOMODE]              = 'OldStereoMode';
			$EBMLidList[EBML_ID_TAG]                        = 'Tag';
			$EBMLidList[EBML_ID_TAGATTACHMENTUID]           = 'TagAttachmentUID';
			$EBMLidList[EBML_ID_TAGBINARY]                  = 'TagBinary';
			$EBMLidList[EBML_ID_TAGCHAPTERUID]              = 'TagChapterUID';
			$EBMLidList[EBML_ID_TAGDEFAULT]                 = 'TagDefault';
			$EBMLidList[EBML_ID_TAGEDITIONUID]              = 'TagEditionUID';
			$EBMLidList[EBML_ID_TAGLANGUAGE]                = 'TagLanguage';
			$EBMLidList[EBML_ID_TAGNAME]                    = 'TagName';
			$EBMLidList[EBML_ID_TAGTRACKUID]                = 'TagTrackUID';
			$EBMLidList[EBML_ID_TAGS]                       = 'Tags';
			$EBMLidList[EBML_ID_TAGSTRING]                  = 'TagString';
			$EBMLidList[EBML_ID_TARGETS]                    = 'Targets';
			$EBMLidList[EBML_ID_TARGETTYPE]                 = 'TargetType';
			$EBMLidList[EBML_ID_TARGETTYPEVALUE]            = 'TargetTypeValue';
			$EBMLidList[EBML_ID_TIMECODESCALE]              = 'TimecodeScale';
			$EBMLidList[EBML_ID_TITLE]                      = 'Title';
			$EBMLidList[EBML_ID_TRACKENTRY]                 = 'TrackEntry';
			$EBMLidList[EBML_ID_TRACKNUMBER]                = 'TrackNumber';
			$EBMLidList[EBML_ID_TRACKOFFSET]                = 'TrackOffset';
			$EBMLidList[EBML_ID_TRACKOVERLAY]               = 'TrackOverlay';
			$EBMLidList[EBML_ID_TRACKS]                     = 'Tracks';
			$EBMLidList[EBML_ID_TRACKTIMECODESCALE]         = 'TrackTimecodeScale';
			$EBMLidList[EBML_ID_TRACKTRANSLATE]             = 'TrackTranslate';
			$EBMLidList[EBML_ID_TRACKTRANSLATECODEC]        = 'TrackTranslateCodec';
			$EBMLidList[EBML_ID_TRACKTRANSLATEEDITIONUID]   = 'TrackTranslateEditionUID';
			$EBMLidList[EBML_ID_TRACKTRANSLATETRACKID]      = 'TrackTranslateTrackID';
			$EBMLidList[EBML_ID_TRACKTYPE]                  = 'TrackType';
			$EBMLidList[EBML_ID_TRACKUID]                   = 'TrackUID';
			$EBMLidList[EBML_ID_VIDEO]                      = 'Video';
			$EBMLidList[EBML_ID_VOID]                       = 'Void';
			$EBMLidList[EBML_ID_WRITINGAPP]                 = 'WritingApp';
		}

return (isset($EBMLidList[$value]) ? $EBMLidList[$value] : dechex($value));
	}

/**
	 * @param int $value
	 *
	 * @return string
	 */
	public static function displayUnit($value) {
		// http://www.matroska.org/technical/specs/index.html#DisplayUnit
		static $units = array(
			0 => 'pixels',
			1 => 'centimeters',
			2 => 'inches',
			3 => 'Display Aspect Ratio');

return (isset($units[$value]) ? $units[$value] : 'unknown');
	}

/**
	 * @param array $streams
	 *
	 * @return array
	 */
	private static function getDefaultStreamInfo($streams)
	{
		$stream = array();
		foreach (array_reverse($streams) as $stream) {
			if ($stream['default']) {
				break;
			}
		}

$unset = array('default', 'name');
		foreach ($unset as $u) {
			if (isset($stream[$u])) {
				unset($stream[$u]);
			}
		}

$info = $stream;
		$info['streams'] = $streams;

return $info;
	}

/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org>               //
//  available at https://github.com/JamesHeinrich/getID3       //
//            or https://www.getid3.org                        //
//            or http://getid3.sourceforge.net                 //
//  see readme.txt for more details                            //
/////////////////////////////////////////////////////////////////
//                                                             //
// module.audio-video.quicktime.php                            //
// module for analyzing Quicktime and MP3-in-MP4 files         //
// dependencies: module.audio.mp3.php                          //
// dependencies: module.tag.id3v2.php                          //
//                                                            ///
/////////////////////////////////////////////////////////////////

if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
	exit;
}
getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.mp3.php', __FILE__, true);
getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.tag.id3v2.php', __FILE__, true); // needed for ISO 639-2 language code lookup

class getid3_quicktime extends getid3_handler
{

/** audio-video.quicktime
	 * return all parsed data from all atoms if true, otherwise just returned parsed metadata
	 *
	 * @var bool
	 */
	public $ReturnAtomData        = false;

/** audio-video.quicktime
	 * return all parsed data from all atoms if true, otherwise just returned parsed metadata
	 *
	 * @var bool
	 */
	public $ParseAllPossibleAtoms = false;

/**
	 * real ugly, but so is the QuickTime structure that stores keys and values in different multi-nested locations that are hard to relate to each other
	 * https://github.com/JamesHeinrich/getID3/issues/214
	 *
	 * @var int
	 */
	private $metaDATAkey = 1;

/**
	 * @return bool
	 */
	public function Analyze() {
		$info = &$this->getid3->info;

$this->metaDATAkey = 1;
		$info['fileformat'] = 'quicktime';
		$info['quicktime']['hinting']    = false;
		$info['quicktime']['controller'] = 'standard'; // may be overridden if 'ctyp' atom is present

$this->fseek($info['avdataoffset']);

$offset      = 0;
		$atomcounter = 0;
		$atom_data_read_buffer_size = $info['php_memory_limit'] ? round($info['php_memory_limit'] / 4) : $this->getid3->option_fread_buffer_size * 1024; // set read buffer to 25% of PHP memory limit (if one is specified), otherwise use option_fread_buffer_size [default: 32MB]
		while ($offset < $info['avdataend']) {
			if (!getid3_lib::intValueSupported($offset)) {
				$this->error('Unable to parse atom at offset '.$offset.' because beyond '.round(PHP_INT_MAX / 1073741824).'GB limit of PHP filesystem functions');
				break;
			}
			$this->fseek($offset);
			$AtomHeader = $this->fread(8);

// https://github.com/JamesHeinrich/getID3/issues/382
			// Atom sizes are stored as 32-bit number in most cases, but sometimes (notably for "mdat")
			// a 64-bit value is required, in which case the normal 32-bit size field is set to 0x00000001
			// and the 64-bit "real" size value is the next 8 bytes.
			$atom_size_extended_bytes = 0;
			$atomsize = getid3_lib::BigEndian2Int(substr($AtomHeader, 0, 4));
			$atomname = substr($AtomHeader, 4, 4);
			if ($atomsize == 1) {
				$atom_size_extended_bytes = 8;
				$atomsize = getid3_lib::BigEndian2Int($this->fread($atom_size_extended_bytes));
			}

if (($offset + $atomsize) > $info['avdataend']) {
				$info['quicktime'][$atomname]['name']   = $atomname;
				$info['quicktime'][$atomname]['size']   = $atomsize;
				$info['quicktime'][$atomname]['offset'] = $offset;
				$this->error('Atom at offset '.$offset.' claims to go beyond end-of-file (length: '.$atomsize.' bytes)');
				return false;
			}
			if ($atomsize == 0) {
				// Furthermore, for historical reasons the list of atoms is optionally
				// terminated by a 32-bit integer set to 0. If you are writing a program
				// to read user data atoms, you should allow for the terminating 0.
				$info['quicktime'][$atomname]['name']   = $atomname;
				$info['quicktime'][$atomname]['size']   = $atomsize;
				$info['quicktime'][$atomname]['offset'] = $offset;
				break;
			}
			$atomHierarchy = array();
			$parsedAtomData = $this->QuicktimeParseAtom($atomname, $atomsize, $this->fread(min($atomsize - $atom_size_extended_bytes, $atom_data_read_buffer_size)), $offset, $atomHierarchy, $this->ParseAllPossibleAtoms);
			$parsedAtomData['name']   = $atomname;
			$parsedAtomData['size']   = $atomsize;
			$parsedAtomData['offset'] = $offset;
			if ($atom_size_extended_bytes) {
				$parsedAtomData['xsize_bytes'] = $atom_size_extended_bytes;
			}
			if (in_array($atomname, array('uuid'))) {
				@$info['quicktime'][$atomname][] = $parsedAtomData;
			} else {
				$info['quicktime'][$atomname] = $parsedAtomData;
			}

$offset += $atomsize;
			$atomcounter++;
		}

if (!empty($info['avdataend_tmp'])) {
			// this value is assigned to a temp value and then erased because
			// otherwise any atoms beyond the 'mdat' atom would not get parsed
			$info['avdataend'] = $info['avdataend_tmp'];
			unset($info['avdataend_tmp']);
		}

if (isset($info['quicktime']['comments']['chapters']) && is_array($info['quicktime']['comments']['chapters']) && (count($info['quicktime']['comments']['chapters']) > 0)) {
			$durations = $this->quicktime_time_to_sample_table($info);
			for ($i = 0; $i < count($info['quicktime']['comments']['chapters']); $i++) {
				$bookmark = array();
				$bookmark['title'] = $info['quicktime']['comments']['chapters'][$i];
				if (isset($durations[$i])) {
					$bookmark['duration_sample'] = $durations[$i]['sample_duration'];
					if ($i > 0) {
						$bookmark['start_sample'] = $info['quicktime']['bookmarks'][($i - 1)]['start_sample'] + $info['quicktime']['bookmarks'][($i - 1)]['duration_sample'];
					} else {
						$bookmark['start_sample'] = 0;
					}
					if ($time_scale = $this->quicktime_bookmark_time_scale($info)) {
						$bookmark['duration_seconds'] = $bookmark['duration_sample'] / $time_scale;
						$bookmark['start_seconds']    = $bookmark['start_sample']    / $time_scale;
					}
				}
				$info['quicktime']['bookmarks'][] = $bookmark;
			}
		}

if (isset($info['quicktime']['temp_meta_key_names'])) {
			unset($info['quicktime']['temp_meta_key_names']);
		}

if (!empty($info['quicktime']['comments']['location.ISO6709'])) {
			// https://en.wikipedia.org/wiki/ISO_6709
			foreach ($info['quicktime']['comments']['location.ISO6709'] as $ISO6709string) {
				$ISO6709parsed = array('latitude'=>false, 'longitude'=>false, 'altitude'=>false);
				if (preg_match('#^([\\+\\-])([0-9]{2}|[0-9]{4}|[0-9]{6})(\\.[0-9]+)?([\\+\\-])([0-9]{3}|[0-9]{5}|[0-9]{7})(\\.[0-9]+)?(([\\+\\-])([0-9]{3}|[0-9]{5}|[0-9]{7})(\\.[0-9]+)?)?/$#', $ISO6709string, $matches)) {
					@list($dummy, $lat_sign, $lat_deg, $lat_deg_dec, $lon_sign, $lon_deg, $lon_deg_dec, $dummy, $alt_sign, $alt_deg, $alt_deg_dec) = $matches;

if (strlen($lat_deg) == 2) {        // [+-]DD.D
						$ISO6709parsed['latitude'] = (($lat_sign == '-') ? -1 : 1) * (float) (ltrim($lat_deg, '0').$lat_deg_dec);
					} elseif (strlen($lat_deg) == 4) {  // [+-]DDMM.M
						$ISO6709parsed['latitude'] = (($lat_sign == '-') ? -1 : 1) * (int) ltrim(substr($lat_deg, 0, 2), '0') + ((float) (ltrim(substr($lat_deg, 2, 2), '0').$lat_deg_dec) / 60);
					} elseif (strlen($lat_deg) == 6) {  // [+-]DDMMSS.S
						$ISO6709parsed['latitude'] = (($lat_sign == '-') ? -1 : 1) * (int) ltrim(substr($lat_deg, 0, 2), '0') + ((int) ltrim(substr($lat_deg, 2, 2), '0') / 60) + ((float) (ltrim(substr($lat_deg, 4, 2), '0').$lat_deg_dec) / 3600);
					}

if (strlen($lon_deg) == 3) {        // [+-]DDD.D
						$ISO6709parsed['longitude'] = (($lon_sign == '-') ? -1 : 1) * (float) (ltrim($lon_deg, '0').$lon_deg_dec);
					} elseif (strlen($lon_deg) == 5) {  // [+-]DDDMM.M
						$ISO6709parsed['longitude'] = (($lon_sign == '-') ? -1 : 1) * (int) ltrim(substr($lon_deg, 0, 2), '0') + ((float) (ltrim(substr($lon_deg, 2, 2), '0').$lon_deg_dec) / 60);
					} elseif (strlen($lon_deg) == 7) {  // [+-]DDDMMSS.S
						$ISO6709parsed['longitude'] = (($lon_sign == '-') ? -1 : 1) * (int) ltrim(substr($lon_deg, 0, 2), '0') + ((int) ltrim(substr($lon_deg, 2, 2), '0') / 60) + ((float) (ltrim(substr($lon_deg, 4, 2), '0').$lon_deg_dec) / 3600);
					}

if (strlen($alt_deg) == 3) {        // [+-]DDD.D
						$ISO6709parsed['altitude'] = (($alt_sign == '-') ? -1 : 1) * (float) (ltrim($alt_deg, '0').$alt_deg_dec);
					} elseif (strlen($alt_deg) == 5) {  // [+-]DDDMM.M
						$ISO6709parsed['altitude'] = (($alt_sign == '-') ? -1 : 1) * (int) ltrim(substr($alt_deg, 0, 2), '0') + ((float) (ltrim(substr($alt_deg, 2, 2), '0').$alt_deg_dec) / 60);
					} elseif (strlen($alt_deg) == 7) {  // [+-]DDDMMSS.S
						$ISO6709parsed['altitude'] = (($alt_sign == '-') ? -1 : 1) * (int) ltrim(substr($alt_deg, 0, 2), '0') + ((int) ltrim(substr($alt_deg, 2, 2), '0') / 60) + ((float) (ltrim(substr($alt_deg, 4, 2), '0').$alt_deg_dec) / 3600);
					}

foreach (array('latitude', 'longitude', 'altitude') as $key) {
						if ($ISO6709parsed[$key] !== false) {
							$value = (($lat_sign == '-') ? -1 : 1) * floatval($ISO6709parsed[$key]);
							if (!isset($info['quicktime']['comments']['gps_'.$key]) || !in_array($value, $info['quicktime']['comments']['gps_'.$key])) {
								@$info['quicktime']['comments']['gps_'.$key][] = (($lat_sign == '-') ? -1 : 1) * floatval($ISO6709parsed[$key]);
							}
						}
					}
				}
				if ($ISO6709parsed['latitude'] === false) {
					$this->warning('location.ISO6709 string not parsed correctly: "'.$ISO6709string.'", please submit as a bug');
				}
				break;
			}
		}

if (!isset($info['bitrate']) && !empty($info['playtime_seconds'])) {
			$info['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['playtime_seconds'];
		}
		if (isset($info['bitrate']) && !isset($info['audio']['bitrate']) && !isset($info['quicktime']['video'])) {
			$info['audio']['bitrate'] = $info['bitrate'];
		}
		if (!empty($info['bitrate']) && !empty($info['audio']['bitrate']) && empty($info['video']['bitrate']) && !empty($info['video']['frame_rate']) && !empty($info['video']['resolution_x']) && ($info['bitrate'] > $info['audio']['bitrate'])) {
			$info['video']['bitrate'] = $info['bitrate'] - $info['audio']['bitrate'];
		}
		if (!empty($info['playtime_seconds']) && !isset($info['video']['frame_rate']) && !empty($info['quicktime']['stts_framecount'])) {
			foreach ($info['quicktime']['stts_framecount'] as $key => $samples_count) {
				$samples_per_second = $samples_count / $info['playtime_seconds'];
				if ($samples_per_second > 240) {
					// has to be audio samples
				} else {
					$info['video']['frame_rate'] = $samples_per_second;
					break;
				}
			}
		}
		if ($info['audio']['dataformat'] == 'mp4') {
			$info['fileformat'] = 'mp4';
			if (empty($info['video']['resolution_x'])) {
				$info['mime_type']  = 'audio/mp4';
				unset($info['video']['dataformat']);
			} else {
				$info['mime_type']  = 'video/mp4';
			}
		}
		if (!empty($info['quicktime']['ftyp']['signature']) && in_array($info['quicktime']['ftyp']['signature'], array('heic','heix','hevc','hevx','heim','heis','hevm','hevs'))) {
			if ($info['mime_type'] == 'video/quicktime') { // default value, as we
				// https://en.wikipedia.org/wiki/High_Efficiency_Image_File_Format
$this->error('HEIF files not currently supported');
				switch ($info['quicktime']['ftyp']['signature']) {
					// https://github.com/strukturag/libheif/issues/83 (comment by Dirk Farin 2018-09-14)
					case 'heic': // the usual HEIF images
					case 'heix': // 10bit images, or anything that uses h265 with range extension
					case 'hevc': // brands for image sequences
					case 'hevx': // brands for image sequences
					case 'heim': // multiview
					case 'heis': // scalable
					case 'hevm': // multiview sequence
					case 'hevs': // scalable sequence
						$info['fileformat'] = 'heif';
						$info['mime_type'] = 'image/heif';
						break;
				}
			}
		}

if (!$this->ReturnAtomData) {
			unset($info['quicktime']['moov']);
		}

if (empty($info['audio']['dataformat']) && !empty($info['quicktime']['audio'])) {
			$info['audio']['dataformat'] = 'quicktime';
		}
		if (empty($info['video']['dataformat']) && !empty($info['quicktime']['video'])) {
			$info['video']['dataformat'] = 'quicktime';
		}
		if (isset($info['video']) && ($info['mime_type'] == 'audio/mp4') && empty($info['video']['resolution_x']) && empty($info['video']['resolution_y']))  {
			unset($info['video']);
		}

return true;
	}

/**
	 * @param string $atomname
	 * @param int    $atomsize
	 * @param string $atom_data
	 * @param int    $baseoffset
	 * @param array  $atomHierarchy
	 * @param bool   $ParseAllPossibleAtoms
	 *
	 * @return array|false
	 */
	public function QuicktimeParseAtom($atomname, $atomsize, $atom_data, $baseoffset, &$atomHierarchy, $ParseAllPossibleAtoms) {
		// http://developer.apple.com/techpubs/quicktime/qtdevdocs/APIREF/INDEX/atomalphaindex.htm
		// https://code.google.com/p/mp4v2/wiki/iTunesMetadata

$info = &$this->getid3->info;

$atom_parent = end($atomHierarchy); // not array_pop($atomHierarchy); see https://www.getid3.org/phpBB3/viewtopic.php?t=1717
		array_push($atomHierarchy, $atomname);
		$atom_structure              = array();
		$atom_structure['hierarchy'] = implode(' ', $atomHierarchy);
		$atom_structure['name']      = $atomname;
		$atom_structure['size']      = $atomsize;
		$atom_structure['offset']    = $baseoffset;
		if (substr($atomname, 0, 3) == "\x00\x00\x00") {
			// https://github.com/JamesHeinrich/getID3/issues/139
			$atomname = getid3_lib::BigEndian2Int($atomname);
			$atom_structure['name'] = $atomname;
			$atom_structure['subatoms'] = $this->QuicktimeParseContainerAtom($atom_data, $baseoffset + 8, $atomHierarchy, $ParseAllPossibleAtoms);
		} else {
			switch ($atomname) {
				case 'moov': // MOVie container atom
				case 'moof': // MOvie Fragment box
				case 'trak': // TRAcK container atom
				case 'traf': // TRAck Fragment box
				case 'clip': // CLIPping container atom
				case 'matt': // track MATTe container atom
				case 'edts': // EDiTS container atom
				case 'tref': // Track REFerence container atom
				case 'mdia': // MeDIA container atom
				case 'minf': // Media INFormation container atom
				case 'dinf': // Data INFormation container atom
				case 'nmhd': // Null Media HeaDer container atom
				case 'udta': // User DaTA container atom
				case 'cmov': // Compressed MOVie container atom
				case 'rmra': // Reference Movie Record Atom
				case 'rmda': // Reference Movie Descriptor Atom
				case 'gmhd': // Generic Media info HeaDer atom (seen on QTVR)
					$atom_structure['subatoms'] = $this->QuicktimeParseContainerAtom($atom_data, $baseoffset + 8, $atomHierarchy, $ParseAllPossibleAtoms);
					break;

case 'ilst': // Item LiST container atom
					if ($atom_structure['subatoms'] = $this->QuicktimeParseContainerAtom($atom_data, $baseoffset + 8, $atomHierarchy, $ParseAllPossibleAtoms)) {
						// some "ilst" atoms contain data atoms that have a numeric name, and the data is far more accessible if the returned array is compacted
						$allnumericnames = true;
						foreach ($atom_structure['subatoms'] as $subatomarray) {
							if (!is_integer($subatomarray['name']) || (count($subatomarray['subatoms']) != 1)) {
								$allnumericnames = false;
								break;
							}
						}
						if ($allnumericnames) {
							$newData = array();
							foreach ($atom_structure['subatoms'] as $subatomarray) {
								foreach ($subatomarray['subatoms'] as $newData_subatomarray) {
									unset($newData_subatomarray['hierarchy'], $newData_subatomarray['name']);
									$newData[$subatomarray['name']] = $newData_subatomarray;
									break;
								}
							}
							$atom_structure['data'] = $newData;
							unset($atom_structure['subatoms']);
						}
					}
					break;

case 'stbl': // Sample TaBLe container atom
					$atom_structure['subatoms'] = $this->QuicktimeParseContainerAtom($atom_data, $baseoffset + 8, $atomHierarchy, $ParseAllPossibleAtoms);
					$isVideo = false;
					$framerate  = 0;
					$framecount = 0;
					foreach ($atom_structure['subatoms'] as $key => $value_array) {
						if (isset($value_array['sample_description_table'])) {
							foreach ($value_array['sample_description_table'] as $key2 => $value_array2) {
								if (isset($value_array2['data_format'])) {
									switch ($value_array2['data_format']) {
										case 'avc1':
										case 'mp4v':
											// video data
											$isVideo = true;
											break;
										case 'mp4a':
											// audio data
											break;
									}
								}
							}
						} elseif (isset($value_array['time_to_sample_table'])) {
							foreach ($value_array['time_to_sample_table'] as $key2 => $value_array2) {
								if (isset($value_array2['sample_count']) && isset($value_array2['sample_duration']) && ($value_array2['sample_duration'] > 0) && !empty($info['quicktime']['time_scale'])) {
									$framerate  = round($info['quicktime']['time_scale'] / $value_array2['sample_duration'], 3);
									$framecount = $value_array2['sample_count'];
								}
							}
						}
					}
					if ($isVideo && $framerate) {
						$info['quicktime']['video']['frame_rate'] = $framerate;
						$info['video']['frame_rate'] = $info['quicktime']['video']['frame_rate'];
					}
					if ($isVideo && $framecount) {
						$info['quicktime']['video']['frame_count'] = $framecount;
					}
					break;

case "\xA9".'alb': // ALBum
				case "\xA9".'ART': //
				case "\xA9".'art': // ARTist
				case "\xA9".'aut': //
				case "\xA9".'cmt': // CoMmenT
				case "\xA9".'com': // COMposer
				case "\xA9".'cpy': //
				case "\xA9".'day': // content created year
				case "\xA9".'dir': //
				case "\xA9".'ed1': //
				case "\xA9".'ed2': //
				case "\xA9".'ed3': //
				case "\xA9".'ed4': //
				case "\xA9".'ed5': //
				case "\xA9".'ed6': //
				case "\xA9".'ed7': //
				case "\xA9".'ed8': //
				case "\xA9".'ed9': //
				case "\xA9".'enc': //
				case "\xA9".'fmt': //
				case "\xA9".'gen': // GENre
				case "\xA9".'grp': // GRouPing
				case "\xA9".'hst': //
				case "\xA9".'inf': //
				case "\xA9".'lyr': // LYRics
				case "\xA9".'mak': //
				case "\xA9".'mod': //
				case "\xA9".'nam': // full NAMe
				case "\xA9".'ope': //
				case "\xA9".'PRD': //
				case "\xA9".'prf': //
				case "\xA9".'req': //
				case "\xA9".'src': //
				case "\xA9".'swr': //
				case "\xA9".'too': // encoder
				case "\xA9".'trk': // TRacK
				case "\xA9".'url': //
				case "\xA9".'wrn': //
				case "\xA9".'wrt': // WRiTer
				case '----': // itunes specific
				case 'aART': // Album ARTist
				case 'akID': // iTunes store account type
				case 'apID': // Purchase Account
				case 'atID': //
				case 'catg': // CaTeGory
				case 'cmID': //
				case 'cnID': //
				case 'covr': // COVeR artwork
				case 'cpil': // ComPILation
				case 'cprt': // CoPyRighT
				case 'desc': // DESCription
				case 'disk': // DISK number
				case 'egid': // Episode Global ID
				case 'geID': //
				case 'gnre': // GeNRE
				case 'hdvd': // HD ViDeo
				case 'keyw': // KEYWord
				case 'ldes': // Long DEScription
				case 'pcst': // PodCaST
				case 'pgap': // GAPless Playback
				case 'plID': //
				case 'purd': // PURchase Date
				case 'purl': // Podcast URL
				case 'rati': //
				case 'rndu': //
				case 'rpdu': //
				case 'rtng': // RaTiNG
				case 'sfID': // iTunes store country
				case 'soaa': // SOrt Album Artist
				case 'soal': // SOrt ALbum
				case 'soar': // SOrt ARtist
				case 'soco': // SOrt COmposer
				case 'sonm': // SOrt NaMe
				case 'sosn': // SOrt Show Name
				case 'stik': //
				case 'tmpo': // TeMPO (BPM)
				case 'trkn': // TRacK Number
				case 'tven': // tvEpisodeID
				case 'tves': // TV EpiSode
				case 'tvnn': // TV Network Name
				case 'tvsh': // TV SHow Name
				case 'tvsn': // TV SeasoN
					if ($atom_parent == 'udta') {
						// User data atom handler
						$atom_structure['data_length'] = getid3_lib::BigEndian2Int(substr($atom_data, 0, 2));
						$atom_structure['language_id'] = getid3_lib::BigEndian2Int(substr($atom_data, 2, 2));
						$atom_structure['data']        =                           substr($atom_data, 4);

$atom_structure['language']    = $this->QuicktimeLanguageLookup($atom_structure['language_id']);
						if (empty($info['comments']['language']) || (!in_array($atom_structure['language'], $info['comments']['language']))) {
							$info['comments']['language'][] = $atom_structure['language'];
						}
					} else {
						// Apple item list box atom handler
						$atomoffset = 0;
						if (substr($atom_data, 2, 2) == "\x10\xB5") {
							// not sure what it means, but observed on iPhone4 data.
							// Each $atom_data has 2 bytes of datasize, plus 0x10B5, then data
							while ($atomoffset < strlen($atom_data)) {
								$boxsmallsize = getid3_lib::BigEndian2Int(substr($atom_data, $atomoffset,     2));
								$boxsmalltype =                           substr($atom_data, $atomoffset + 2, 2);
								$boxsmalldata =                           substr($atom_data, $atomoffset + 4, $boxsmallsize);
								if ($boxsmallsize <= 1) {
									$this->warning('Invalid QuickTime atom smallbox size "'.$boxsmallsize.'" in atom "'.preg_replace('#[^a-zA-Z0-9 _\\-]#', '?', $atomname).'" at offset: '.($atom_structure['offset'] + $atomoffset));
									$atom_structure['data'] = null;
									$atomoffset = strlen($atom_data);
									break;
								}
								switch ($boxsmalltype) {
									case "\x10\xB5":
										$atom_structure['data'] = $boxsmalldata;
										break;
									default:
										$this->warning('Unknown QuickTime smallbox type: "'.preg_replace('#[^a-zA-Z0-9 _\\-]#', '?', $boxsmalltype).'" ('.trim(getid3_lib::PrintHexBytes($boxsmalltype)).') at offset '.$baseoffset);
										$atom_structure['data'] = $atom_data;
										break;
								}
								$atomoffset += (4 + $boxsmallsize);
							}
						} else {
							while ($atomoffset < strlen($atom_data)) {
								$boxsize = getid3_lib::BigEndian2Int(substr($atom_data, $atomoffset, 4));
								$boxtype =                           substr($atom_data, $atomoffset + 4, 4);
								$boxdata =                           substr($atom_data, $atomoffset + 8, $boxsize - 8);
								if ($boxsize <= 1) {
									$this->warning('Invalid QuickTime atom box size "'.$boxsize.'" in atom "'.preg_replace('#[^a-zA-Z0-9 _\\-]#', '?', $atomname).'" at offset: '.($atom_structure['offset'] + $atomoffset));
									$atom_structure['data'] = null;
									$atomoffset = strlen($atom_data);
									break;
								}
								$atomoffset += $boxsize;

switch ($boxtype) {
									case 'mean':
									case 'name':
										$atom_structure[$boxtype] = substr($boxdata, 4);
										break;

case 'data':
										$atom_structure['version']   = getid3_lib::BigEndian2Int(substr($boxdata,  0, 1));
										$atom_structure['flags_raw'] = getid3_lib::BigEndian2Int(substr($boxdata,  1, 3));
										switch ($atom_structure['flags_raw']) {
											case  0: // data flag
											case 21: // tmpo/cpil flag
												switch ($atomname) {
													case 'cpil':
													case 'hdvd':
													case 'pcst':
													case 'pgap':
														// 8-bit integer (boolean)
														$atom_structure['data'] = getid3_lib::BigEndian2Int(substr($boxdata, 8, 1));
														break;

case 'tmpo':
														// 16-bit integer
														$atom_structure['data'] = getid3_lib::BigEndian2Int(substr($boxdata, 8, 2));
														break;

case 'disk':
													case 'trkn':
														// binary
														$num       = getid3_lib::BigEndian2Int(substr($boxdata, 10, 2));
														$num_total = getid3_lib::BigEndian2Int(substr($boxdata, 12, 2));
														$atom_structure['data']  = empty($num) ? '' : $num;
														$atom_structure['data'] .= empty($num_total) ? '' : '/'.$num_total;
														break;

case 'gnre':
														// enum
														$GenreID = getid3_lib::BigEndian2Int(substr($boxdata, 8, 4));
														$atom_structure['data']    = getid3_id3v1::LookupGenreName($GenreID - 1);
														break;

case 'rtng':
														// 8-bit integer
														$atom_structure[$atomname] = getid3_lib::BigEndian2Int(substr($boxdata, 8, 1));
														$atom_structure['data']    = $this->QuicktimeContentRatingLookup($atom_structure[$atomname]);
														break;

case 'stik':
														// 8-bit integer (enum)
														$atom_structure[$atomname] = getid3_lib::BigEndian2Int(substr($boxdata, 8, 1));
														$atom_structure['data']    = $this->QuicktimeSTIKLookup($atom_structure[$atomname]);
														break;

case 'sfID':
														// 32-bit integer
														$atom_structure[$atomname] = getid3_lib::BigEndian2Int(substr($boxdata, 8, 4));
														$atom_structure['data']    = $this->QuicktimeStoreFrontCodeLookup($atom_structure[$atomname]);
														break;

case 'egid':
													case 'purl':
														$atom_structure['data'] = substr($boxdata, 8);
														break;

case 'plID':
														// 64-bit integer
														$atom_structure['data'] = getid3_lib::BigEndian2Int(substr($boxdata, 8, 8));
														break;

case 'covr':
														$atom_structure['data'] = substr($boxdata, 8);
														// not a foolproof check, but better than nothing
														if (preg_match('#^\\xFF\\xD8\\xFF#', $atom_structure['data'])) {
															$atom_structure['image_mime'] = 'image/jpeg';
														} elseif (preg_match('#^\\x89\\x50\\x4E\\x47\\x0D\\x0A\\x1A\\x0A#', $atom_structure['data'])) {
															$atom_structure['image_mime'] = 'image/png';
														} elseif (preg_match('#^GIF#', $atom_structure['data'])) {
															$atom_structure['image_mime'] = 'image/gif';
														}
														$info['quicktime']['comments']['picture'][] = array('image_mime'=>$atom_structure['image_mime'], 'data'=>$atom_structure['data'], 'description'=>'cover');
														break;

case 'atID':
													case 'cnID':
													case 'geID':
													case 'tves':
													case 'tvsn':
													default:
														// 32-bit integer
														$atom_structure['data'] = getid3_lib::BigEndian2Int(substr($boxdata, 8, 4));
												}
												break;

case  1: // text flag
											case 13: // image flag
											default:
												$atom_structure['data'] = substr($boxdata, 8);
												if ($atomname == 'covr') {
													if (!empty($atom_structure['data'])) {
														$atom_structure['image_mime'] = 'image/unknown'; // provide default MIME type to ensure array keys exist
														if (function_exists('getimagesizefromstring') && ($getimagesize = getimagesizefromstring($atom_structure['data'])) && !empty($getimagesize['mime'])) {
															$atom_structure['image_mime'] = $getimagesize['mime'];
														} else {
															// if getimagesizefromstring is not available, or fails for some reason, fall back to simple detection of common image formats
															$ImageFormatSignatures = array(
																'image/jpeg' => "\xFF\xD8\xFF",
																'image/png'  => "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A",
																'image/gif'  => 'GIF',
															);
															foreach ($ImageFormatSignatures as $mime => $image_format_signature) {
																if (substr($atom_structure['data'], 0, strlen($image_format_signature)) == $image_format_signature) {
																	$atom_structure['image_mime'] = $mime;
																	break;
																}
															}
														}
														$info['quicktime']['comments']['picture'][] = array('image_mime'=>$atom_structure['image_mime'], 'data'=>$atom_structure['data'], 'description'=>'cover');
													} else {
														$this->warning('Unknown empty "covr" image at offset '.$baseoffset);
													}
												}
												break;

}
										break;

default:
										$this->warning('Unknown QuickTime box type: "'.preg_replace('#[^a-zA-Z0-9 _\\-]#', '?', $boxtype).'" ('.trim(getid3_lib::PrintHexBytes($boxtype)).') at offset '.$baseoffset);
										$atom_structure['data'] = $atom_data;

}
							}
						}
					}
					$this->CopyToAppropriateCommentsSection($atomname, $atom_structure['data'], $atom_structure['name']);
					break;

case 'play': // auto-PLAY atom
					$atom_structure['autoplay'] = (bool) getid3_lib::BigEndian2Int(substr($atom_data,  0, 1));

$info['quicktime']['autoplay'] = $atom_structure['autoplay'];
					break;

case 'WLOC': // Window LOCation atom
					$atom_structure['location_x']  = getid3_lib::BigEndian2Int(substr($atom_data,  0, 2));
					$atom_structure['location_y']  = getid3_lib::BigEndian2Int(substr($atom_data,  2, 2));
					break;

case 'LOOP': // LOOPing atom
				case 'SelO': // play SELection Only atom
				case 'AllF': // play ALL Frames atom
					$atom_structure['data'] = getid3_lib::BigEndian2Int($atom_data);
					break;

case 'name': //
				case 'MCPS': // Media Cleaner PRo
				case '@PRM': // adobe PReMiere version
				case '@PRQ': // adobe PRemiere Quicktime version
					$atom_structure['data'] = $atom_data;
					break;

case 'cmvd': // Compressed MooV Data atom
					// Code by ubergeekØubergeek*tv based on information from
					// http://developer.apple.com/quicktime/icefloe/dispatch012.html
					$atom_structure['unCompressedSize'] = getid3_lib::BigEndian2Int(substr($atom_data, 0, 4));

$CompressedFileData = substr($atom_data, 4);
					if ($UncompressedHeader = @gzuncompress($CompressedFileData)) {
						$atom_structure['subatoms'] = $this->QuicktimeParseContainerAtom($UncompressedHeader, 0, $atomHierarchy, $ParseAllPossibleAtoms);
					} else {
						$this->warning('Error decompressing compressed MOV atom at offset '.$atom_structure['offset']);
					}
					break;

case 'dcom': // Data COMpression atom
					$atom_structure['compression_id']   = $atom_data;
					$atom_structure['compression_text'] = $this->QuicktimeDCOMLookup($atom_data);
					break;

case 'rdrf': // Reference movie Data ReFerence atom
					$atom_structure['version']                = getid3_lib::BigEndian2Int(substr($atom_data,  0, 1));
					$atom_structure['flags_raw']              = getid3_lib::BigEndian2Int(substr($atom_data,  1, 3));
					$atom_structure['flags']['internal_data'] = (bool) ($atom_structure['flags_raw'] & 0x000001);

$atom_structure['reference_type_name']    =                           substr($atom_data,  4, 4);
					$atom_structure['reference_length']       = getid3_lib::BigEndian2Int(substr($atom_data,  8, 4));
					switch ($atom_structure['reference_type_name']) {
						case 'url ':
							$atom_structure['url']            =       $this->NoNullString(substr($atom_data, 12));
							break;

case 'alis':
							$atom_structure['file_alias']     =                           substr($atom_data, 12);
							break;

case 'rsrc':
							$atom_structure['resource_alias'] =                           substr($atom_data, 12);
							break;

default:
							$atom_structure['data']           =                           substr($atom_data, 12);
							break;
					}
					break;

case 'rmqu': // Reference Movie QUality atom
					$atom_structure['movie_quality'] = getid3_lib::BigEndian2Int($atom_data);
					break;

case 'rmcs': // Reference Movie Cpu Speed atom
					$atom_structure['version']          = getid3_lib::BigEndian2Int(substr($atom_data,  0, 1));
					$atom_structure['flags_raw']        = getid3_lib::BigEndian2Int(substr($atom_data,  1, 3)); // hardcoded: 0x0000
					$atom_structure['cpu_speed_rating'] = getid3_lib::BigEndian2Int(substr($atom_data,  4, 2));
					break;

case 'rmvc': // Reference Movie Version Check atom
					$atom_structure['version']            = getid3_lib::BigEndian2Int(substr($atom_data,  0, 1));
					$atom_structure['flags_raw']          = getid3_lib::BigEndian2Int(substr($atom_data,  1, 3)); // hardcoded: 0x0000
					$atom_structure['gestalt_selector']   =                           substr($atom_data,  4, 4);
					$atom_structure['gestalt_value_mask'] = getid3_lib::BigEndian2Int(substr($atom_data,  8, 4));
					$atom_structure['gestalt_value']      = getid3_lib::BigEndian2Int(substr($atom_data, 12, 4));
					$atom_structure['gestalt_check_type'] = getid3_lib::BigEndian2Int(substr($atom_data, 14, 2));
					break;

case 'rmcd': // Reference Movie Component check atom
					$atom_structure['version']                = getid3_lib::BigEndian2Int(substr($atom_data,  0, 1));
					$atom_structure['flags_raw']              = getid3_lib::BigEndian2Int(substr($atom_data,  1, 3)); // hardcoded: 0x0000
					$atom_structure['component_type']         =                           substr($atom_data,  4, 4);
					$atom_structure['component_subtype']      =                           substr($atom_data,  8, 4);
					$atom_structure['component_manufacturer'] =                           substr($atom_data, 12, 4);
					$atom_structure['component_flags_raw']    = getid3_lib::BigEndian2Int(substr($atom_data, 16, 4));
					$atom_structure['component_flags_mask']   = getid3_lib::BigEndian2Int(substr($atom_data, 20, 4));
					$atom_structure['component_min_version']  = getid3_lib::BigEndian2Int(substr($atom_data, 24, 4));
					break;

case 'rmdr': // Reference Movie Data Rate atom
					$atom_structure['version']       = getid3_lib::BigEndian2Int(substr($atom_data,  0, 1));
					$atom_structure['flags_raw']     = getid3_lib::BigEndian2Int(substr($atom_data,  1, 3)); // hardcoded: 0x0000
					$atom_structure['data_rate']     = getid3_lib::BigEndian2Int(substr($atom_data,  4, 4));

$atom_structure['data_rate_bps'] = $atom_structure['data_rate'] * 10;
					break;

case 'rmla': // Reference Movie Language Atom
					$atom_structure['version']     = getid3_lib::BigEndian2Int(substr($atom_data,  0, 1));
					$atom_structure['flags_raw']   = getid3_lib::BigEndian2Int(substr($atom_data,  1, 3)); // hardcoded: 0x0000
					$atom_structure['language_id'] = getid3_lib::BigEndian2Int(substr($atom_data,  4, 2));

case 'ptv ': // Print To Video - defines a movie's full screen mode
					// http://developer.apple.com/documentation/QuickTime/APIREF/SOURCESIV/at_ptv-_pg.htm
					$atom_structure['display_size_raw']  = getid3_lib::BigEndian2Int(substr($atom_data, 0, 2));
					$atom_structure['reserved_1']        = getid3_lib::BigEndian2Int(substr($atom_data, 2, 2)); // hardcoded: 0x0000
					$atom_structure['reserved_2']        = getid3_lib::BigEndian2Int(substr($atom_data, 4, 2)); // hardcoded: 0x0000
					$atom_structure['slide_show_flag']   = getid3_lib::BigEndian2Int(substr($atom_data, 6, 1));
					$atom_structure['play_on_open_flag'] = getid3_lib::BigEndian2Int(substr($atom_data, 7, 1));

$atom_structure['flags']['play_on_open'] = (bool) $atom_structure['play_on_open_flag'];
					$atom_structure['flags']['slide_show']   = (bool) $atom_structure['slide_show_flag'];

$ptv_lookup = array(
						0 => 'normal',
						1 => 'double',
						2 => 'half',
						3 => 'full',
						4 => 'current'
					);
					if (isset($ptv_lookup[$atom_structure['display_size_raw']])) {
						$atom_structure['display_size'] = $ptv_lookup[$atom_structure['display_size_raw']];
					} else {
						$this->warning('unknown "ptv " display constant ('.$atom_structure['display_size_raw'].')');
					}
					break;

case 'stsd': // Sample Table Sample Description atom
					$atom_structure['version']        = getid3_lib::BigEndian2Int(substr($atom_data,  0, 1)); // hardcoded: 0x00
					$atom_structure['flags_raw']      = getid3_lib::BigEndian2Int(substr($atom_data,  1, 3)); // hardcoded: 0x000000
					$atom_structure['number_entries'] = getid3_lib::BigEndian2Int(substr($atom_data,  4, 4));

// see: https://github.com/JamesHeinrich/getID3/issues/111
					// Some corrupt files have been known to have high bits set in the number_entries field
					// This field shouldn't really need to be 32-bits, values stores are likely in the range 1-100000
					// Workaround: mask off the upper byte and throw a warning if it's nonzero
					if ($atom_structure['number_entries'] > 0x000FFFFF) {
						if ($atom_structure['number_entries'] > 0x00FFFFFF) {
							$this->warning('"stsd" atom contains improbably large number_entries (0x'.getid3_lib::PrintHexBytes(substr($atom_data, 4, 4), true, false).' = '.$atom_structure['number_entries'].'), probably in error. Ignoring upper byte and interpreting this as 0x'.getid3_lib::PrintHexBytes(substr($atom_data, 5, 3), true, false).' = '.($atom_structure['number_entries'] & 0x00FFFFFF));
							$atom_structure['number_entries'] = ($atom_structure['number_entries'] & 0x00FFFFFF);
						} else {
							$this->warning('"stsd" atom contains improbably large number_entries (0x'.getid3_lib::PrintHexBytes(substr($atom_data, 4, 4), true, false).' = '.$atom_structure['number_entries'].'), probably in error. Please report this to info@getid3.org referencing bug report #111');
						}
					}

$stsdEntriesDataOffset = 8;
					for ($i = 0; $i < (int) $atom_structure['number_entries']; $i++) {
						$atom_structure['sample_description_table'][$i]['size']             = getid3_lib::BigEndian2Int(substr($atom_data, $stsdEntriesDataOffset, 4));
						$stsdEntriesDataOffset += 4;
						$atom_structure['sample_description_table'][$i]['data_format']      =                           substr($atom_data, $stsdEntriesDataOffset, 4);
						$stsdEntriesDataOffset += 4;
						$atom_structure['sample_description_table'][$i]['reserved']         = getid3_lib::BigEndian2Int(substr($atom_data, $stsdEntriesDataOffset, 6));
						$stsdEntriesDataOffset += 6;
						$atom_structure['sample_description_table'][$i]['reference_index']  = getid3_lib::BigEndian2Int(substr($atom_data, $stsdEntriesDataOffset, 2));
						$stsdEntriesDataOffset += 2;
						$atom_structure['sample_description_table'][$i]['data']             =                           substr($atom_data, $stsdEntriesDataOffset, ($atom_structure['sample_description_table'][$i]['size'] - 4 - 4 - 6 - 2));
						$stsdEntriesDataOffset += ($atom_structure['sample_description_table'][$i]['size'] - 4 - 4 - 6 - 2);
						if (substr($atom_structure['sample_description_table'][$i]['data'],  1, 54) == 'application/octet-stream;type=com.parrot.videometadata') {
							// special handling for apparently-malformed (TextMetaDataSampleEntry?) data for some version of Parrot drones
							$atom_structure['sample_description_table'][$i]['parrot_frame_metadata']['mime_type']        =       substr($atom_structure['sample_description_table'][$i]['data'],  1, 55);
							$atom_structure['sample_description_table'][$i]['parrot_frame_metadata']['metadata_version'] = (int) substr($atom_structure['sample_description_table'][$i]['data'], 55,  1);
							unset($atom_structure['sample_description_table'][$i]['data']);
$this->warning('incomplete/incorrect handling of "stsd" with Parrot metadata in this version of getID3() ['.$this->getid3->version().']');
							continue;
						}

$atom_structure['sample_description_table'][$i]['encoder_version']  = getid3_lib::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'],  0, 2));
						$atom_structure['sample_description_table'][$i]['encoder_revision'] = getid3_lib::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'],  2, 2));
						$atom_structure['sample_description_table'][$i]['encoder_vendor']   =                           substr($atom_structure['sample_description_table'][$i]['data'],  4, 4);

switch ($atom_structure['sample_description_table'][$i]['encoder_vendor']) {

case "\x00\x00\x00\x00":
								// audio tracks
								$atom_structure['sample_description_table'][$i]['audio_channels']       =   getid3_lib::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'],  8,  2));
								$atom_structure['sample_description_table'][$i]['audio_bit_depth']      =   getid3_lib::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], 10,  2));
								$atom_structure['sample_description_table'][$i]['audio_compression_id'] =   getid3_lib::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], 12,  2));
								$atom_structure['sample_description_table'][$i]['audio_packet_size']    =   getid3_lib::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], 14,  2));
								$atom_structure['sample_description_table'][$i]['audio_sample_rate']    = getid3_lib::FixedPoint16_16(substr($atom_structure['sample_description_table'][$i]['data'], 16,  4));

// video tracks
								// http://developer.apple.com/library/mac/#documentation/QuickTime/QTFF/QTFFChap3/qtff3.html
								// https://developer.apple.com/documentation/quicktime-file-format
								$STSDvOffset = 8;
								$atom_structure['sample_description_table'][$i]['temporal_quality'] =   getid3_lib::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], $STSDvOffset,  4)); $STSDvOffset +=  4;
								$atom_structure['sample_description_table'][$i]['spatial_quality']  =   getid3_lib::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], $STSDvOffset,  4)); $STSDvOffset +=  4;
								$atom_structure['sample_description_table'][$i]['width']            =   getid3_lib::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], $STSDvOffset,  2)); $STSDvOffset +=  2;
								$atom_structure['sample_description_table'][$i]['height']           =   getid3_lib::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], $STSDvOffset,  2)); $STSDvOffset +=  2;
								$atom_structure['sample_description_table'][$i]['resolution_x']     = getid3_lib::FixedPoint16_16(substr($atom_structure['sample_description_table'][$i]['data'], $STSDvOffset,  4)); $STSDvOffset +=  4;
								$atom_structure['sample_description_table'][$i]['resolution_y']     = getid3_lib::FixedPoint16_16(substr($atom_structure['sample_description_table'][$i]['data'], $STSDvOffset,  4)); $STSDvOffset +=  4;
								$atom_structure['sample_description_table'][$i]['data_size']        =   getid3_lib::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], $STSDvOffset,  4)); $STSDvOffset +=  4;
								$atom_structure['sample_description_table'][$i]['frame_count']      =   getid3_lib::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], $STSDvOffset,  2)); $STSDvOffset +=  2;
								$atom_structure['sample_description_table'][$i]['compressor_name']  =                             substr($atom_structure['sample_description_table'][$i]['data'], $STSDvOffset, 32) ; $STSDvOffset += 32;
								$atom_structure['sample_description_table'][$i]['compressor_name'] = $this->MaybePascal2String(rtrim($atom_structure['sample_description_table'][$i]['compressor_name'], "\x00")); // https://github.com/JamesHeinrich/getID3/issues/452
								$atom_structure['sample_description_table'][$i]['pixel_depth']      =   getid3_lib::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], $STSDvOffset,  2)); $STSDvOffset +=  2;
								$atom_structure['sample_description_table'][$i]['color_table_id']   =   getid3_lib::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], $STSDvOffset,  2)); $STSDvOffset +=  2;

switch ($atom_structure['sample_description_table'][$i]['data_format']) {
									case '2vuY':
									case 'avc1':
									case 'cvid':
									case 'dvc ':
									case 'dvcp':
									case 'gif ':
									case 'h263':
									case 'hvc1':
									case 'jpeg':
									case 'kpcd':
									case 'mjpa':
									case 'mjpb':
									case 'mp4v':
									case 'png ':
									case 'raw ':
									case 'rle ':
									case 'rpza':
									case 'smc ':
									case 'SVQ1':
									case 'SVQ3':
									case 'tiff':
									case 'v210':
									case 'v216':
									case 'v308':
									case 'v408':
									case 'v410':
									case 'yuv2':
										$info['fileformat'] = 'mp4';
										$info['video']['fourcc'] = $atom_structure['sample_description_table'][$i]['data_format'];
										if ($this->QuicktimeVideoCodecLookup($info['video']['fourcc'])) {
											$info['video']['fourcc_lookup'] = $this->QuicktimeVideoCodecLookup($info['video']['fourcc']);
										}

// https://www.getid3.org/phpBB3/viewtopic.php?t=1550
										//if ((!empty($atom_structure['sample_description_table'][$i]['width']) && !empty($atom_structure['sample_description_table'][$i]['width'])) && (empty($info['video']['resolution_x']) || empty($info['video']['resolution_y']) || (number_format($info['video']['resolution_x'], 6) != number_format(round($info['video']['resolution_x']), 6)) || (number_format($info['video']['resolution_y'], 6) != number_format(round($info['video']['resolution_y']), 6)))) { // ugly check for floating point numbers
										if (!empty($atom_structure['sample_description_table'][$i]['width']) && !empty($atom_structure['sample_description_table'][$i]['height'])) {
											// assume that values stored here are more important than values stored in [tkhd] atom
											$info['video']['resolution_x'] = $atom_structure['sample_description_table'][$i]['width'];
											$info['video']['resolution_y'] = $atom_structure['sample_description_table'][$i]['height'];
											$info['quicktime']['video']['resolution_x'] = $info['video']['resolution_x'];
											$info['quicktime']['video']['resolution_y'] = $info['video']['resolution_y'];
										}
										break;

case 'qtvr':
										$info['video']['dataformat'] = 'quicktimevr';
										break;

case 'mp4a':
										$atom_structure['sample_description_table'][$i]['subatoms'] = $this->QuicktimeParseContainerAtom(substr($atom_structure['sample_description_table'][$i]['data'], 20), $baseoffset + $stsdEntriesDataOffset - 20 - 16, $atomHierarchy, $ParseAllPossibleAtoms);

$info['quicktime']['audio']['codec']       = $this->QuicktimeAudioCodecLookup($atom_structure['sample_description_table'][$i]['data_format']);
										$info['quicktime']['audio']['sample_rate'] = $atom_structure['sample_description_table'][$i]['audio_sample_rate'];
										$info['quicktime']['audio']['channels']    = $atom_structure['sample_description_table'][$i]['audio_channels'];
										$info['quicktime']['audio']['bit_depth']   = $atom_structure['sample_description_table'][$i]['audio_bit_depth'];
										$info['audio']['codec']                    = $info['quicktime']['audio']['codec'];
										$info['audio']['sample_rate']              = $info['quicktime']['audio']['sample_rate'];
										$info['audio']['channels']                 = $info['quicktime']['audio']['channels'];
										$info['audio']['bits_per_sample']          = $info['quicktime']['audio']['bit_depth'];
										switch ($atom_structure['sample_description_table'][$i]['data_format']) {
											case 'raw ': // PCM
											case 'alac': // Apple Lossless Audio Codec
											case 'sowt': // signed/two's complement (Little Endian)
											case 'twos': // signed/two's complement (Big Endian)
											case 'in24': // 24-bit Integer
											case 'in32': // 32-bit Integer
											case 'fl32': // 32-bit Floating Point
											case 'fl64': // 64-bit Floating Point
												$info['audio']['lossless'] = $info['quicktime']['audio']['lossless'] = true;
												$info['audio']['bitrate']  = $info['quicktime']['audio']['bitrate']  = $info['audio']['channels'] * $info['audio']['bits_per_sample'] * $info['audio']['sample_rate'];
												break;
											default:
												$info['audio']['lossless'] = false;
												break;
										}
										break;

default:
										break;
								}
								break;

default:
								switch ($atom_structure['sample_description_table'][$i]['data_format']) {
									case 'mp4s':
										$info['fileformat'] = 'mp4';
										break;

default:
										// video atom
										$atom_structure['sample_description_table'][$i]['video_temporal_quality']  =   getid3_lib::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'],  8,  4));
										$atom_structure['sample_description_table'][$i]['video_spatial_quality']   =   getid3_lib::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], 12,  4));
										$atom_structure['sample_description_table'][$i]['video_frame_width']       =   getid3_lib::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], 16,  2));
										$atom_structure['sample_description_table'][$i]['video_frame_height']      =   getid3_lib::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], 18,  2));
										$atom_structure['sample_description_table'][$i]['video_resolution_x']      = getid3_lib::FixedPoint16_16(substr($atom_structure['sample_description_table'][$i]['data'], 20,  4));
										$atom_structure['sample_description_table'][$i]['video_resolution_y']      = getid3_lib::FixedPoint16_16(substr($atom_structure['sample_description_table'][$i]['data'], 24,  4));
										$atom_structure['sample_description_table'][$i]['video_data_size']         =   getid3_lib::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], 28,  4));
										$atom_structure['sample_description_table'][$i]['video_frame_count']       =   getid3_lib::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], 32,  2));
										$atom_structure['sample_description_table'][$i]['video_encoder_name_len']  =   getid3_lib::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], 34,  1));
										$atom_structure['sample_description_table'][$i]['video_encoder_name']      =                             substr($atom_structure['sample_description_table'][$i]['data'], 35, $atom_structure['sample_description_table'][$i]['video_encoder_name_len']);
										$atom_structure['sample_description_table'][$i]['video_pixel_color_depth'] =   getid3_lib::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], 66,  2));
										$atom_structure['sample_description_table'][$i]['video_color_table_id']    =   getid3_lib::BigEndian2Int(substr($atom_structure['sample_description_table'][$i]['data'], 68,  2));

$atom_structure['sample_description_table'][$i]['video_pixel_color_type']  = (((int) $atom_structure['sample_description_table'][$i]['video_pixel_color_depth'] > 32) ? 'grayscale' : 'color');
										$atom_structure['sample_description_table'][$i]['video_pixel_color_name']  = $this->QuicktimeColorNameLookup($atom_structure['sample_description_table'][$i]['video_pixel_color_depth']);

if ($atom_structure['sample_description_table'][$i]['video_pixel_color_name'] != 'invalid') {
											$info['quicktime']['video']['codec_fourcc']        = $atom_structure['sample_description_table'][$i]['data_format'];
											$info['quicktime']['video']['codec_fourcc_lookup'] = $this->QuicktimeVideoCodecLookup($atom_structure['sample_description_table'][$i]['data_format']);
											$info['quicktime']['video']['codec']               = (((int) $atom_structure['sample_description_table'][$i]['video_encoder_name_len'] > 0) ? $atom_structure['sample_description_table'][$i]['video_encoder_name'] : $atom_structure['sample_description_table'][$i]['data_format']);
											$info['quicktime']['video']['color_depth']         = $atom_structure['sample_description_table'][$i]['video_pixel_color_depth'];
											$info['quicktime']['video']['color_depth_name']    = $atom_structure['sample_description_table'][$i]['video_pixel_color_name'];

$info['video']['codec']           = $info['quicktime']['video']['codec'];
											$info['video']['bits_per_sample'] = $info['quicktime']['video']['color_depth'];
										}
										$info['video']['lossless']           = false;
										$info['video']['pixel_aspect_ratio'] = (float) 1;
										break;
								}
								break;
						}
						switch (strtolower($atom_structure['sample_description_table'][$i]['data_format'])) {
							case 'mp4a':
								$info['audio']['dataformat']         = 'mp4';
								$info['quicktime']['audio']['codec'] = 'mp4';
								break;

case '3ivx':
							case '3iv1':
							case '3iv2':
								$info['video']['dataformat'] = '3ivx';
								break;

case 'xvid':
								$info['video']['dataformat'] = 'xvid';
								break;

case 'mp4v':
								$info['video']['dataformat'] = 'mpeg4';
								break;

case 'divx':
							case 'div1':
							case 'div2':
							case 'div3':
							case 'div4':
							case 'div5':
							case 'div6':
								$info['video']['dataformat'] = 'divx';
								break;

default:
								// do nothing
								break;
						}
						unset($atom_structure['sample_description_table'][$i]['data']);
					}
					break;

case 'stts': // Sample Table Time-to-Sample atom
					$atom_structure['version']        = getid3_lib::BigEndian2Int(substr($atom_data,  0, 1));
					$atom_structure['flags_raw']      = getid3_lib::BigEndian2Int(substr($atom_data,  1, 3)); // hardcoded: 0x0000
					$atom_structure['number_entries'] = getid3_lib::BigEndian2Int(substr($atom_data,  4, 4));
					$sttsEntriesDataOffset = 8;
					//$FrameRateCalculatorArray = array();
					$frames_count = 0;

$max_stts_entries_to_scan = ($info['php_memory_limit'] ? min(floor($this->getid3->memory_limit / 10000), $atom_structure['number_entries']) : $atom_structure['number_entries']);
					if ($max_stts_entries_to_scan < $atom_structure['number_entries']) {
						$this->warning('QuickTime atom "stts" has '.$atom_structure['number_entries'].' but only scanning the first '.$max_stts_entries_to_scan.' entries due to limited PHP memory available ('.floor($this->getid3->memory_limit / 1048576).'MB).');
					}
					for ($i = 0; $i < $max_stts_entries_to_scan; $i++) {
						$atom_structure['time_to_sample_table'][$i]['sample_count']    = getid3_lib::BigEndian2Int(substr($atom_data, $sttsEntriesDataOffset, 4));
						$sttsEntriesDataOffset += 4;
						$atom_structure['time_to_sample_table'][$i]['sample_duration'] = getid3_lib::BigEndian2Int(substr($atom_data, $sttsEntriesDataOffset, 4));
						$sttsEntriesDataOffset += 4;

$frames_count += $atom_structure['time_to_sample_table'][$i]['sample_count'];

// THIS SECTION REPLACED WITH CODE IN "stbl" ATOM
						//if (!empty($info['quicktime']['time_scale']) && ($atom_structure['time_to_sample_table'][$i]['sample_duration'] > 0)) {
						//	$stts_new_framerate = $info['quicktime']['time_scale'] / $atom_structure['time_to_sample_table'][$i]['sample_duration'];
						//	if ($stts_new_framerate <= 60) {
						//		// some atoms have durations of "1" giving a very large framerate, which probably is not right
						//		$info['video']['frame_rate'] = max($info['video']['frame_rate'], $stts_new_framerate);
						//	}
						//}
						//
						//$FrameRateCalculatorArray[($info['quicktime']['time_scale'] / $atom_structure['time_to_sample_table'][$i]['sample_duration'])] += $atom_structure['time_to_sample_table'][$i]['sample_count'];
					}
					$info['quicktime']['stts_framecount'][] = $frames_count;
					//$sttsFramesTotal  = 0;
					//$sttsSecondsTotal = 0;
					//foreach ($FrameRateCalculatorArray as $frames_per_second => $frame_count) {
					//	if (($frames_per_second > 60) || ($frames_per_second < 1)) {
					//		// not video FPS information, probably audio information
					//		$sttsFramesTotal  = 0;
					//		$sttsSecondsTotal = 0;
					//		break;
					//	}
					//	$sttsFramesTotal  += $frame_count;
					//	$sttsSecondsTotal += $frame_count / $frames_per_second;
					//}
					//if (($sttsFramesTotal > 0) && ($sttsSecondsTotal > 0)) {
					//	if (($sttsFramesTotal / $sttsSecondsTotal) > $info['video']['frame_rate']) {
					//		$info['video']['frame_rate'] = $sttsFramesTotal / $sttsSecondsTotal;
					//	}
					//}
					break;

case 'stss': // Sample Table Sync Sample (key frames) atom
					if ($ParseAllPossibleAtoms) {
						$atom_structure['version']        = getid3_lib::BigEndian2Int(substr($atom_data,  0, 1));
						$atom_structure['flags_raw']      = getid3_lib::BigEndian2Int(substr($atom_data,  1, 3)); // hardcoded: 0x0000
						$atom_structure['number_entries'] = getid3_lib::BigEndian2Int(substr($atom_data,  4, 4));
						$stssEntriesDataOffset = 8;
						for ($i = 0; $i < $atom_structure['number_entries']; $i++) {
							$atom_structure['time_to_sample_table'][$i] = getid3_lib::BigEndian2Int(substr($atom_data, $stssEntriesDataOffset, 4));
							$stssEntriesDataOffset += 4;
						}
					}
					break;

case 'stsc': // Sample Table Sample-to-Chunk atom
					if ($ParseAllPossibleAtoms) {
						$atom_structure['version']        = getid3_lib::BigEndian2Int(substr($atom_data,  0, 1));
						$atom_structure['flags_raw']      = getid3_lib::BigEndian2Int(substr($atom_data,  1, 3)); // hardcoded: 0x0000
						$atom_structure['number_entries'] = getid3_lib::BigEndian2Int(substr($atom_data,  4, 4));
						$stscEntriesDataOffset = 8;
						for ($i = 0; $i < $atom_structure['number_entries']; $i++) {
							$atom_structure['sample_to_chunk_table'][$i]['first_chunk']        = getid3_lib::BigEndian2Int(substr($atom_data, $stscEntriesDataOffset, 4));
							$stscEntriesDataOffset += 4;
							$atom_structure['sample_to_chunk_table'][$i]['samples_per_chunk']  = getid3_lib::BigEndian2Int(substr($atom_data, $stscEntriesDataOffset, 4));
							$stscEntriesDataOffset += 4;
							$atom_structure['sample_to_chunk_table'][$i]['sample_description'] = getid3_lib::BigEndian2Int(substr($atom_data, $stscEntriesDataOffset, 4));
							$stscEntriesDataOffset += 4;
						}
					}
					break;

case 'stsz': // Sample Table SiZe atom
					if ($ParseAllPossibleAtoms) {
						$atom_structure['version']        = getid3_lib::BigEndian2Int(substr($atom_data,  0, 1));
						$atom_structure['flags_raw']      = getid3_lib::BigEndian2Int(substr($atom_data,  1, 3)); // hardcoded: 0x0000
						$atom_structure['sample_size']    = getid3_lib::BigEndian2Int(substr($atom_data,  4, 4));
						$atom_structure['number_entries'] = getid3_lib::BigEndian2Int(substr($atom_data,  8, 4));
						$stszEntriesDataOffset = 12;
						if ($atom_structure['sample_size'] == 0) {
							for ($i = 0; $i < $atom_structure['number_entries']; $i++) {
								$atom_structure['sample_size_table'][$i] = getid3_lib::BigEndian2Int(substr($atom_data, $stszEntriesDataOffset, 4));
								$stszEntriesDataOffset += 4;
							}
						}
					}
					break;

case 'stco': // Sample Table Chunk Offset atom
//					if (true) {
					if ($ParseAllPossibleAtoms) {
						$atom_structure['version']        = getid3_lib::BigEndian2Int(substr($atom_data,  0, 1));
						$atom_structure['flags_raw']      = getid3_lib::BigEndian2Int(substr($atom_data,  1, 3)); // hardcoded: 0x0000
						$atom_structure['number_entries'] = getid3_lib::BigEndian2Int(substr($atom_data,  4, 4));
						$stcoEntriesDataOffset = 8;
						for ($i = 0; $i < $atom_structure['number_entries']; $i++) {
							$atom_structure['chunk_offset_table'][$i] = getid3_lib::BigEndian2Int(substr($atom_data, $stcoEntriesDataOffset, 4));
							$stcoEntriesDataOffset += 4;
						}
					}
					break;

case 'co64': // Chunk Offset 64-bit (version of "stco" that supports > 2GB files)
					if ($ParseAllPossibleAtoms) {
						$atom_structure['version']        = getid3_lib::BigEndian2Int(substr($atom_data,  0, 1));
						$atom_structure['flags_raw']      = getid3_lib::BigEndian2Int(substr($atom_data,  1, 3)); // hardcoded: 0x0000
						$atom_structure['number_entries'] = getid3_lib::BigEndian2Int(substr($atom_data,  4, 4));
						$stcoEntriesDataOffset = 8;
						for ($i = 0; $i < $atom_structure['number_entries']; $i++) {
							$atom_structure['chunk_offset_table'][$i] = getid3_lib::BigEndian2Int(substr($atom_data, $stcoEntriesDataOffset, 8));
							$stcoEntriesDataOffset += 8;
						}
					}
					break;

case 'dref': // Data REFerence atom
					$atom_structure['version']        = getid3_lib::BigEndian2Int(substr($atom_data,  0, 1));
					$atom_structure['flags_raw']      = getid3_lib::BigEndian2Int(substr($atom_data,  1, 3)); // hardcoded: 0x0000
					$atom_structure['number_entries'] = getid3_lib::BigEndian2Int(substr($atom_data,  4, 4));
					$drefDataOffset = 8;
					for ($i = 0; $i < $atom_structure['number_entries']; $i++) {
						$atom_structure['data_references'][$i]['size']                    = getid3_lib::BigEndian2Int(substr($atom_data, $drefDataOffset, 4));
						$drefDataOffset += 4;
						$atom_structure['data_references'][$i]['type']                    =                           substr($atom_data, $drefDataOffset, 4);
						$drefDataOffset += 4;
						$atom_structure['data_references'][$i]['version']                 = getid3_lib::BigEndian2Int(substr($atom_data,  $drefDataOffset, 1));
						$drefDataOffset += 1;
						$atom_structure['data_references'][$i]['flags_raw']               = getid3_lib::BigEndian2Int(substr($atom_data,  $drefDataOffset, 3)); // hardcoded: 0x0000
						$drefDataOffset += 3;
						$atom_structure['data_references'][$i]['data']                    =                           substr($atom_data, $drefDataOffset, ($atom_structure['data_references'][$i]['size'] - 4 - 4 - 1 - 3));
						$drefDataOffset += ($atom_structure['data_references'][$i]['size'] - 4 - 4 - 1 - 3);

$atom_structure['data_references'][$i]['flags']['self_reference'] = (bool) ($atom_structure['data_references'][$i]['flags_raw'] & 0x001);
					}
					break;

case 'gmin': // base Media INformation atom
					$atom_structure['version']                = getid3_lib::BigEndian2Int(substr($atom_data,  0, 1));
					$atom_structure['flags_raw']              = getid3_lib::BigEndian2Int(substr($atom_data,  1, 3)); // hardcoded: 0x0000
					$atom_structure['graphics_mode']          = getid3_lib::BigEndian2Int(substr($atom_data,  4, 2));
					$atom_structure['opcolor_red']            = getid3_lib::BigEndian2Int(substr($atom_data,  6, 2));
					$atom_structure['opcolor_green']          = getid3_lib::BigEndian2Int(substr($atom_data,  8, 2));
					$atom_structure['opcolor_blue']           = getid3_lib::BigEndian2Int(substr($atom_data, 10, 2));
					$atom_structure['balance']                = getid3_lib::BigEndian2Int(substr($atom_data, 12, 2));
					$atom_structure['reserved']               = getid3_lib::BigEndian2Int(substr($atom_data, 14, 2));
					break;

case 'smhd': // Sound Media information HeaDer atom
					$atom_structure['version']                = getid3_lib::BigEndian2Int(substr($atom_data,  0, 1));
					$atom_structure['flags_raw']              = getid3_lib::BigEndian2Int(substr($atom_data,  1, 3)); // hardcoded: 0x0000
					$atom_structure['balance']                = getid3_lib::BigEndian2Int(substr($atom_data,  4, 2));
					$atom_structure['reserved']               = getid3_lib::BigEndian2Int(substr($atom_data,  6, 2));
					break;

case 'vmhd': // Video Media information HeaDer atom
					$atom_structure['version']                = getid3_lib::BigEndian2Int(substr($atom_data,  0, 1));
					$atom_structure['flags_raw']              = getid3_lib::BigEndian2Int(substr($atom_data,  1, 3));
					$atom_structure['graphics_mode']          = getid3_lib::BigEndian2Int(substr($atom_data,  4, 2));
					$atom_structure['opcolor_red']            = getid3_lib::BigEndian2Int(substr($atom_data,  6, 2));
					$atom_structure['opcolor_green']          = getid3_lib::BigEndian2Int(substr($atom_data,  8, 2));
					$atom_structure['opcolor_blue']           = getid3_lib::BigEndian2Int(substr($atom_data, 10, 2));

$atom_structure['flags']['no_lean_ahead'] = (bool) ($atom_structure['flags_raw'] & 0x001);
					break;

case 'hdlr': // HanDLeR reference atom
					$atom_structure['version']                = getid3_lib::BigEndian2Int(substr($atom_data,  0, 1));
					$atom_structure['flags_raw']              = getid3_lib::BigEndian2Int(substr($atom_data,  1, 3)); // hardcoded: 0x0000
					$atom_structure['component_type']         =                           substr($atom_data,  4, 4);
					$atom_structure['component_subtype']      =                           substr($atom_data,  8, 4);
					$atom_structure['component_manufacturer'] =                           substr($atom_data, 12, 4);
					$atom_structure['component_flags_raw']    = getid3_lib::BigEndian2Int(substr($atom_data, 16, 4));
					$atom_structure['component_flags_mask']   = getid3_lib::BigEndian2Int(substr($atom_data, 20, 4));
					$atom_structure['component_name']         = $this->MaybePascal2String(substr($atom_data, 24));

if (($atom_structure['component_subtype'] == 'STpn') && ($atom_structure['component_manufacturer'] == 'zzzz')) {
						$info['video']['dataformat'] = 'quicktimevr';
					}
					break;

case 'mdhd': // MeDia HeaDer atom
					$atom_structure['version']               = getid3_lib::BigEndian2Int(substr($atom_data,  0, 1));
					$atom_structure['flags_raw']             = getid3_lib::BigEndian2Int(substr($atom_data,  1, 3)); // hardcoded: 0x0000
					$atom_structure['creation_time']         = getid3_lib::BigEndian2Int(substr($atom_data,  4, 4));
					$atom_structure['modify_time']           = getid3_lib::BigEndian2Int(substr($atom_data,  8, 4));
					$atom_structure['time_scale']            = getid3_lib::BigEndian2Int(substr($atom_data, 12, 4));
					$atom_structure['duration']              = getid3_lib::BigEndian2Int(substr($atom_data, 16, 4));
					$atom_structure['language_id']           = getid3_lib::BigEndian2Int(substr($atom_data, 20, 2));
					$atom_structure['quality']               = getid3_lib::BigEndian2Int(substr($atom_data, 22, 2));

if ($atom_structure['time_scale'] == 0) {
						$this->error('Corrupt Quicktime file: mdhd.time_scale == zero');
						return false;
					}
					$info['quicktime']['time_scale'] = ((isset($info['quicktime']['time_scale']) && ($info['quicktime']['time_scale'] < 1000)) ? max($info['quicktime']['time_scale'], $atom_structure['time_scale']) : $atom_structure['time_scale']);

$atom_structure['creation_time_unix']    = getid3_lib::DateMac2Unix($atom_structure['creation_time']);
					$atom_structure['modify_time_unix']      = getid3_lib::DateMac2Unix($atom_structure['modify_time']);
					$atom_structure['playtime_seconds']      = $atom_structure['duration'] / $atom_structure['time_scale'];
					$atom_structure['language']              = $this->QuicktimeLanguageLookup($atom_structure['language_id']);
					if (empty($info['comments']['language']) || (!in_array($atom_structure['language'], $info['comments']['language']))) {
						$info['comments']['language'][] = $atom_structure['language'];
					}
					$info['quicktime']['timestamps_unix']['create'][$atom_structure['hierarchy']] = $atom_structure['creation_time_unix'];
					$info['quicktime']['timestamps_unix']['modify'][$atom_structure['hierarchy']] = $atom_structure['modify_time_unix'];
					break;

case 'pnot': // Preview atom
					$atom_structure['modification_date']      = getid3_lib::BigEndian2Int(substr($atom_data,  0, 4)); // "standard Macintosh format"
					$atom_structure['version_number']         = getid3_lib::BigEndian2Int(substr($atom_data,  4, 2)); // hardcoded: 0x00
					$atom_structure['atom_type']              =                           substr($atom_data,  6, 4);        // usually: 'PICT'
					$atom_structure['atom_index']             = getid3_lib::BigEndian2Int(substr($atom_data, 10, 2)); // usually: 0x01

$atom_structure['modification_date_unix'] = getid3_lib::DateMac2Unix($atom_structure['modification_date']);
					$info['quicktime']['timestamps_unix']['modify'][$atom_structure['hierarchy']] = $atom_structure['modification_date_unix'];
					break;

case 'crgn': // Clipping ReGioN atom
					$atom_structure['region_size']   = getid3_lib::BigEndian2Int(substr($atom_data,  0, 2)); // The Region size, Region boundary box,
					$atom_structure['boundary_box']  = getid3_lib::BigEndian2Int(substr($atom_data,  2, 8)); // and Clipping region data fields
					$atom_structure['clipping_data'] =                           substr($atom_data, 10);           // constitute a QuickDraw region.
					break;

case 'load': // track LOAD settings atom
					$atom_structure['preload_start_time'] = getid3_lib::BigEndian2Int(substr($atom_data,  0, 4));
					$atom_structure['preload_duration']   = getid3_lib::BigEndian2Int(substr($atom_data,  4, 4));
					$atom_structure['preload_flags_raw']  = getid3_lib::BigEndian2Int(substr($atom_data,  8, 4));
					$atom_structure['default_hints_raw']  = getid3_lib::BigEndian2Int(substr($atom_data, 12, 4));

$atom_structure['default_hints']['double_buffer'] = (bool) ($atom_structure['default_hints_raw'] & 0x0020);
					$atom_structure['default_hints']['high_quality']  = (bool) ($atom_structure['default_hints_raw'] & 0x0100);
					break;

case 'tmcd': // TiMe CoDe atom
				case 'chap': // CHAPter list atom
				case 'sync': // SYNChronization atom
				case 'scpt': // tranSCriPT atom
				case 'ssrc': // non-primary SouRCe atom
					for ($i = 0; $i < strlen($atom_data); $i += 4) {
						@$atom_structure['track_id'][] = getid3_lib::BigEndian2Int(substr($atom_data, $i, 4));
					}
					break;

case 'elst': // Edit LiST atom
					$atom_structure['version']        = getid3_lib::BigEndian2Int(substr($atom_data,  0, 1));
					$atom_structure['flags_raw']      = getid3_lib::BigEndian2Int(substr($atom_data,  1, 3)); // hardcoded: 0x0000
					$atom_structure['number_entries'] = getid3_lib::BigEndian2Int(substr($atom_data,  4, 4));
					for ($i = 0; $i < $atom_structure['number_entries']; $i++ ) {
						$atom_structure['edit_list'][$i]['track_duration'] =   getid3_lib::BigEndian2Int(substr($atom_data, 8 + ($i * 12) + 0, 4));
						$atom_structure['edit_list'][$i]['media_time']     =   getid3_lib::BigEndian2Int(substr($atom_data, 8 + ($i * 12) + 4, 4));
						$atom_structure['edit_list'][$i]['media_rate']     = getid3_lib::FixedPoint16_16(substr($atom_data, 8 + ($i * 12) + 8, 4));
					}
					break;

case 'kmat': // compressed MATte atom
					$atom_structure['version']        = getid3_lib::BigEndian2Int(substr($atom_data,  0, 1));
					$atom_structure['flags_raw']      = getid3_lib::BigEndian2Int(substr($atom_data,  1, 3)); // hardcoded: 0x0000
					$atom_structure['matte_data_raw'] =               substr($atom_data,  4);
					break;

case 'ctab': // Color TABle atom
					$atom_structure['color_table_seed']   = getid3_lib::BigEndian2Int(substr($atom_data,  0, 4)); // hardcoded: 0x00000000
					$atom_structure['color_table_flags']  = getid3_lib::BigEndian2Int(substr($atom_data,  4, 2)); // hardcoded: 0x8000
					$atom_structure['color_table_size']   = getid3_lib::BigEndian2Int(substr($atom_data,  6, 2)) + 1;
					for ($colortableentry = 0; $colortableentry < $atom_structure['color_table_size']; $colortableentry++) {
						$atom_structure['color_table'][$colortableentry]['alpha'] = getid3_lib::BigEndian2Int(substr($atom_data, 8 + ($colortableentry * 8) + 0, 2));
						$atom_structure['color_table'][$colortableentry]['red']   = getid3_lib::BigEndian2Int(substr($atom_data, 8 + ($colortableentry * 8) + 2, 2));
						$atom_structure['color_table'][$colortableentry]['green'] = getid3_lib::BigEndian2Int(substr($atom_data, 8 + ($colortableentry * 8) + 4, 2));
						$atom_structure['color_table'][$colortableentry]['blue']  = getid3_lib::BigEndian2Int(substr($atom_data, 8 + ($colortableentry * 8) + 6, 2));
					}
					break;

case 'mvhd': // MoVie HeaDer atom
					$atom_structure['version']            =   getid3_lib::BigEndian2Int(substr($atom_data,  0, 1));
					$atom_structure['flags_raw']          =   getid3_lib::BigEndian2Int(substr($atom_data,  1, 3));
					$atom_structure['creation_time']      =   getid3_lib::BigEndian2Int(substr($atom_data,  4, 4));
					$atom_structure['modify_time']        =   getid3_lib::BigEndian2Int(substr($atom_data,  8, 4));
					$atom_structure['time_scale']         =   getid3_lib::BigEndian2Int(substr($atom_data, 12, 4));
					$atom_structure['duration']           =   getid3_lib::BigEndian2Int(substr($atom_data, 16, 4));
					$atom_structure['preferred_rate']     = getid3_lib::FixedPoint16_16(substr($atom_data, 20, 4));
					$atom_structure['preferred_volume']   =   getid3_lib::FixedPoint8_8(substr($atom_data, 24, 2));
					$atom_structure['reserved']           =                             substr($atom_data, 26, 10);
					$atom_structure['matrix_a']           = getid3_lib::FixedPoint16_16(substr($atom_data, 36, 4));
					$atom_structure['matrix_b']           = getid3_lib::FixedPoint16_16(substr($atom_data, 40, 4));
					$atom_structure['matrix_u']           =  getid3_lib::FixedPoint2_30(substr($atom_data, 44, 4));
					$atom_structure['matrix_c']           = getid3_lib::FixedPoint16_16(substr($atom_data, 48, 4));
					$atom_structure['matrix_d']           = getid3_lib::FixedPoint16_16(substr($atom_data, 52, 4));
					$atom_structure['matrix_v']           =  getid3_lib::FixedPoint2_30(substr($atom_data, 56, 4));
					$atom_structure['matrix_x']           = getid3_lib::FixedPoint16_16(substr($atom_data, 60, 4));
					$atom_structure['matrix_y']           = getid3_lib::FixedPoint16_16(substr($atom_data, 64, 4));
					$atom_structure['matrix_w']           =  getid3_lib::FixedPoint2_30(substr($atom_data, 68, 4));
					$atom_structure['preview_time']       =   getid3_lib::BigEndian2Int(substr($atom_data, 72, 4));
					$atom_structure['preview_duration']   =   getid3_lib::BigEndian2Int(substr($atom_data, 76, 4));
					$atom_structure['poster_time']        =   getid3_lib::BigEndian2Int(substr($atom_data, 80, 4));
					$atom_structure['selection_time']     =   getid3_lib::BigEndian2Int(substr($atom_data, 84, 4));
					$atom_structure['selection_duration'] =   getid3_lib::BigEndian2Int(substr($atom_data, 88, 4));
					$atom_structure['current_time']       =   getid3_lib::BigEndian2Int(substr($atom_data, 92, 4));
					$atom_structure['next_track_id']      =   getid3_lib::BigEndian2Int(substr($atom_data, 96, 4));

if ($atom_structure['time_scale'] == 0) {
						$this->error('Corrupt Quicktime file: mvhd.time_scale == zero');
						return false;
					}
					$atom_structure['creation_time_unix']        = getid3_lib::DateMac2Unix($atom_structure['creation_time']);
					$atom_structure['modify_time_unix']          = getid3_lib::DateMac2Unix($atom_structure['modify_time']);
					$info['quicktime']['timestamps_unix']['create'][$atom_structure['hierarchy']] = $atom_structure['creation_time_unix'];
					$info['quicktime']['timestamps_unix']['modify'][$atom_structure['hierarchy']] = $atom_structure['modify_time_unix'];
					$info['quicktime']['time_scale']    = ((isset($info['quicktime']['time_scale']) && ($info['quicktime']['time_scale'] < 1000)) ? max($info['quicktime']['time_scale'], $atom_structure['time_scale']) : $atom_structure['time_scale']);
					$info['quicktime']['display_scale'] = $atom_structure['matrix_a'];
					$info['playtime_seconds']           = $atom_structure['duration'] / $atom_structure['time_scale'];
					break;

case 'tkhd': // TracK HeaDer atom
					$atom_structure['version']             =   getid3_lib::BigEndian2Int(substr($atom_data,  0, 1));
					$atom_structure['flags_raw']           =   getid3_lib::BigEndian2Int(substr($atom_data,  1, 3));
					$atom_structure['creation_time']       =   getid3_lib::BigEndian2Int(substr($atom_data,  4, 4));
					$atom_structure['modify_time']         =   getid3_lib::BigEndian2Int(substr($atom_data,  8, 4));
					$atom_structure['trackid']             =   getid3_lib::BigEndian2Int(substr($atom_data, 12, 4));
					$atom_structure['reserved1']           =   getid3_lib::BigEndian2Int(substr($atom_data, 16, 4));
					$atom_structure['duration']            =   getid3_lib::BigEndian2Int(substr($atom_data, 20, 4));
					$atom_structure['reserved2']           =   getid3_lib::BigEndian2Int(substr($atom_data, 24, 8));
					$atom_structure['layer']               =   getid3_lib::BigEndian2Int(substr($atom_data, 32, 2));
					$atom_structure['alternate_group']     =   getid3_lib::BigEndian2Int(substr($atom_data, 34, 2));
					$atom_structure['volume']              =   getid3_lib::FixedPoint8_8(substr($atom_data, 36, 2));
					$atom_structure['reserved3']           =   getid3_lib::BigEndian2Int(substr($atom_data, 38, 2));
					// http://developer.apple.com/library/mac/#documentation/QuickTime/RM/MovieBasics/MTEditing/K-Chapter/11MatrixFunctions.html
					// http://developer.apple.com/library/mac/#documentation/QuickTime/qtff/QTFFChap4/qtff4.html#//apple_ref/doc/uid/TP40000939-CH206-18737
					$atom_structure['matrix_a']            = getid3_lib::FixedPoint16_16(substr($atom_data, 40, 4));
					$atom_structure['matrix_b']            = getid3_lib::FixedPoint16_16(substr($atom_data, 44, 4));
					$atom_structure['matrix_u']            =  getid3_lib::FixedPoint2_30(substr($atom_data, 48, 4));
					$atom_structure['matrix_c']            = getid3_lib::FixedPoint16_16(substr($atom_data, 52, 4));
					$atom_structure['matrix_d']            = getid3_lib::FixedPoint16_16(substr($atom_data, 56, 4));
					$atom_structure['matrix_v']            =  getid3_lib::FixedPoint2_30(substr($atom_data, 60, 4));
					$atom_structure['matrix_x']            = getid3_lib::FixedPoint16_16(substr($atom_data, 64, 4));
					$atom_structure['matrix_y']            = getid3_lib::FixedPoint16_16(substr($atom_data, 68, 4));
					$atom_structure['matrix_w']            =  getid3_lib::FixedPoint2_30(substr($atom_data, 72, 4));
					$atom_structure['width']               = getid3_lib::FixedPoint16_16(substr($atom_data, 76, 4));
					$atom_structure['height']              = getid3_lib::FixedPoint16_16(substr($atom_data, 80, 4));
					$atom_structure['flags']['enabled']    = (bool) ($atom_structure['flags_raw'] & 0x0001);
					$atom_structure['flags']['in_movie']   = (bool) ($atom_structure['flags_raw'] & 0x0002);
					$atom_structure['flags']['in_preview'] = (bool) ($atom_structure['flags_raw'] & 0x0004);
					$atom_structure['flags']['in_poster']  = (bool) ($atom_structure['flags_raw'] & 0x0008);
					$atom_structure['creation_time_unix']  = getid3_lib::DateMac2Unix($atom_structure['creation_time']);
					$atom_structure['modify_time_unix']    = getid3_lib::DateMac2Unix($atom_structure['modify_time']);
					$info['quicktime']['timestamps_unix']['create'][$atom_structure['hierarchy']] = $atom_structure['creation_time_unix'];
					$info['quicktime']['timestamps_unix']['modify'][$atom_structure['hierarchy']] = $atom_structure['modify_time_unix'];

// https://www.getid3.org/phpBB3/viewtopic.php?t=1908
					// attempt to compute rotation from matrix values
					// 2017-Dec-28: uncertain if 90/270 are correctly oriented; values returned by FixedPoint16_16 should perhaps be -1 instead of 65535(?)
					$matrixRotation = 0;
					switch ($atom_structure['matrix_a'].':'.$atom_structure['matrix_b'].':'.$atom_structure['matrix_c'].':'.$atom_structure['matrix_d']) {
						case '1:0:0:1':         $matrixRotation =   0; break;
						case '0:1:65535:0':     $matrixRotation =  90; break;
						case '65535:0:0:65535': $matrixRotation = 180; break;
						case '0:65535:1:0':     $matrixRotation = 270; break;
						default: break;
					}

// https://www.getid3.org/phpBB3/viewtopic.php?t=2468
					// The rotation matrix can appear in the Quicktime file multiple times, at least once for each track,
					// and it's possible that only the video track (or, in theory, one of the video tracks) is flagged as
					// rotated while the other tracks (e.g. audio) is tagged as rotation=0 (behavior noted on iPhone 8 Plus)
					// The correct solution would be to check if the TrackID associated with the rotation matrix is indeed
					// a video track (or the main video track) and only set the rotation then, but since information about
					// what track is what is not trivially there to be examined, the lazy solution is to set the rotation
					// if it is found to be nonzero, on the assumption that tracks that don't need it will have rotation set
					// to zero (and be effectively ignored) and the video track will have rotation set correctly, which will
					// either be zero and automatically correct, or nonzero and be set correctly.
					if (!isset($info['video']['rotate']) || (($info['video']['rotate'] == 0) && ($matrixRotation > 0))) {
						$info['quicktime']['video']['rotate'] = $info['video']['rotate'] = $matrixRotation;
					}

if ($atom_structure['flags']['enabled'] == 1) {
						if (!isset($info['video']['resolution_x']) || !isset($info['video']['resolution_y'])) {
							$info['video']['resolution_x'] = $atom_structure['width'];
							$info['video']['resolution_y'] = $atom_structure['height'];
						}
						$info['video']['resolution_x'] = max($info['video']['resolution_x'], $atom_structure['width']);
						$info['video']['resolution_y'] = max($info['video']['resolution_y'], $atom_structure['height']);
						$info['quicktime']['video']['resolution_x'] = $info['video']['resolution_x'];
						$info['quicktime']['video']['resolution_y'] = $info['video']['resolution_y'];
					} else {
						// see: https://www.getid3.org/phpBB3/viewtopic.php?t=1295
						//if (isset($info['video']['resolution_x'])) { unset($info['video']['resolution_x']); }
						//if (isset($info['video']['resolution_y'])) { unset($info['video']['resolution_y']); }
						//if (isset($info['quicktime']['video']))    { unset($info['quicktime']['video']);    }
					}
					break;

case 'iods': // Initial Object DeScriptor atom
					// http://www.koders.com/c/fid1FAB3E762903DC482D8A246D4A4BF9F28E049594.aspx?s=windows.h
					// http://libquicktime.sourcearchive.com/documentation/1.0.2plus-pdebian/iods_8c-source.html
					$offset = 0;
					$atom_structure['version']                =       getid3_lib::BigEndian2Int(substr($atom_data, $offset, 1));
					$offset += 1;
					$atom_structure['flags_raw']              =       getid3_lib::BigEndian2Int(substr($atom_data, $offset, 3));
					$offset += 3;
					$atom_structure['mp4_iod_tag']            =       getid3_lib::BigEndian2Int(substr($atom_data, $offset, 1));
					$offset += 1;
					$atom_structure['length']                 = $this->quicktime_read_mp4_descr_length($atom_data, $offset);
					//$offset already adjusted by quicktime_read_mp4_descr_length()
					$atom_structure['object_descriptor_id']   =       getid3_lib::BigEndian2Int(substr($atom_data, $offset, 2));
					$offset += 2;
					$atom_structure['od_profile_level']       =       getid3_lib::BigEndian2Int(substr($atom_data, $offset, 1));
					$offset += 1;
					$atom_structure['scene_profile_level']    =       getid3_lib::BigEndian2Int(substr($atom_data, $offset, 1));
					$offset += 1;
					$atom_structure['audio_profile_id']       =       getid3_lib::BigEndian2Int(substr($atom_data, $offset, 1));
					$offset += 1;
					$atom_structure['video_profile_id']       =       getid3_lib::BigEndian2Int(substr($atom_data, $offset, 1));
					$offset += 1;
					$atom_structure['graphics_profile_level'] =       getid3_lib::BigEndian2Int(substr($atom_data, $offset, 1));
					$offset += 1;

$atom_structure['num_iods_tracks'] = ($atom_structure['length'] - 7) / 6; // 6 bytes would only be right if all tracks use 1-byte length fields
					for ($i = 0; $i < $atom_structure['num_iods_tracks']; $i++) {
						$atom_structure['track'][$i]['ES_ID_IncTag'] =       getid3_lib::BigEndian2Int(substr($atom_data, $offset, 1));
						$offset += 1;
						$atom_structure['track'][$i]['length']       = $this->quicktime_read_mp4_descr_length($atom_data, $offset);
						//$offset already adjusted by quicktime_read_mp4_descr_length()
						$atom_structure['track'][$i]['track_id']     =       getid3_lib::BigEndian2Int(substr($atom_data, $offset, 4));
						$offset += 4;
					}

$atom_structure['audio_profile_name'] = $this->QuicktimeIODSaudioProfileName($atom_structure['audio_profile_id']);
					$atom_structure['video_profile_name'] = $this->QuicktimeIODSvideoProfileName($atom_structure['video_profile_id']);
					break;

case 'ftyp': // FileTYPe (?) atom (for MP4 it seems)
					$atom_structure['signature'] =                           substr($atom_data,  0, 4);
					$atom_structure['unknown_1'] = getid3_lib::BigEndian2Int(substr($atom_data,  4, 4));
					$atom_structure['fourcc']    =                           substr($atom_data,  8, 4);
					break;

case 'mdat': // Media DATa atom
					// 'mdat' contains the actual data for the audio/video, possibly also subtitles

/* due to lack of known documentation, this is a kludge implementation. If you know of documentation on how mdat is properly structed, please send it to info@getid3.org */

// first, skip any 'wide' padding, and second 'mdat' header (with specified size of zero?)
					$mdat_offset = 0;
					while (true) {
						if (substr($atom_data, $mdat_offset, 8) == "\x00\x00\x00\x08".'wide') {
							$mdat_offset += 8;
						} elseif (substr($atom_data, $mdat_offset, 8) == "\x00\x00\x00\x00".'mdat') {
							$mdat_offset += 8;
						} else {
							break;
						}
					}
					if (substr($atom_data, $mdat_offset, 4) == 'GPRO') {
						$GOPRO_chunk_length = getid3_lib::LittleEndian2Int(substr($atom_data, $mdat_offset + 4, 4));
						$GOPRO_offset = 8;
						$atom_structure['GPRO']['raw'] = substr($atom_data, $mdat_offset + 8, $GOPRO_chunk_length - 8);
						$atom_structure['GPRO']['firmware'] = substr($atom_structure['GPRO']['raw'],  0, 15);
						$atom_structure['GPRO']['unknown1'] = substr($atom_structure['GPRO']['raw'], 15, 16);
						$atom_structure['GPRO']['unknown2'] = substr($atom_structure['GPRO']['raw'], 31, 32);
						$atom_structure['GPRO']['unknown3'] = substr($atom_structure['GPRO']['raw'], 63, 16);
						$atom_structure['GPRO']['camera']   = substr($atom_structure['GPRO']['raw'], 79, 32);
						$info['quicktime']['camera']['model'] = rtrim($atom_structure['GPRO']['camera'], "\x00");
					}

// check to see if it looks like chapter titles, in the form of unterminated strings with a leading 16-bit size field
					while (($mdat_offset < (strlen($atom_data) - 8))
						&& ($chapter_string_length = getid3_lib::BigEndian2Int(substr($atom_data, $mdat_offset, 2)))
						&& ($chapter_string_length < 1000)
						&& ($chapter_string_length <= (strlen($atom_data) - $mdat_offset - 2))
						&& preg_match('#^([\x00-\xFF]{2})([\x20-\xFF]+)$#', substr($atom_data, $mdat_offset, $chapter_string_length + 2), $chapter_matches)) {
							list($dummy, $chapter_string_length_hex, $chapter_string) = $chapter_matches;
							$mdat_offset += (2 + $chapter_string_length);
							@$info['quicktime']['comments']['chapters'][] = $chapter_string;

// "encd" atom specifies encoding. In theory could be anything, almost always UTF-8, but may be UTF-16 with BOM (not currently handled)
							if (substr($atom_data, $mdat_offset, 12) == "\x00\x00\x00\x0C\x65\x6E\x63\x64\x00\x00\x01\x00") { // UTF-8
								$mdat_offset += 12;
							}
					}

if (($atomsize > 8) && (!isset($info['avdataend_tmp']) || ($info['quicktime'][$atomname]['size'] > ($info['avdataend_tmp'] - $info['avdataoffset'])))) {

$info['avdataoffset'] = $atom_structure['offset'] + 8;                       // $info['quicktime'][$atomname]['offset'] + 8;
						$OldAVDataEnd         = $info['avdataend'];
						$info['avdataend']    = $atom_structure['offset'] + $atom_structure['size']; // $info['quicktime'][$atomname]['offset'] + $info['quicktime'][$atomname]['size'];

$getid3_temp = new getID3();
						$getid3_temp->openfile($this->getid3->filename, $this->getid3->info['filesize'], $this->getid3->fp);
						$getid3_temp->info['avdataoffset'] = $info['avdataoffset'];
						$getid3_temp->info['avdataend']    = $info['avdataend'];
						$getid3_mp3 = new getid3_mp3($getid3_temp);
						if ($getid3_mp3->MPEGaudioHeaderValid($getid3_mp3->MPEGaudioHeaderDecode($this->fread(4)))) {
							$getid3_mp3->getOnlyMPEGaudioInfo($getid3_temp->info['avdataoffset'], false);
							if (!empty($getid3_temp->info['warning'])) {
								foreach ($getid3_temp->info['warning'] as $value) {
									$this->warning($value);
								}
							}
							if (!empty($getid3_temp->info['mpeg'])) {
								$info['mpeg'] = $getid3_temp->info['mpeg'];
								if (isset($info['mpeg']['audio'])) {
									$info['audio']['dataformat']   = 'mp3';
									$info['audio']['codec']        = (!empty($info['mpeg']['audio']['encoder']) ? $info['mpeg']['audio']['encoder'] : (!empty($info['mpeg']['audio']['codec']) ? $info['mpeg']['audio']['codec'] : (!empty($info['mpeg']['audio']['LAME']) ? 'LAME' :'mp3')));
									$info['audio']['sample_rate']  = $info['mpeg']['audio']['sample_rate'];
									$info['audio']['channels']     = $info['mpeg']['audio']['channels'];
									$info['audio']['bitrate']      = $info['mpeg']['audio']['bitrate'];
									$info['audio']['bitrate_mode'] = strtolower($info['mpeg']['audio']['bitrate_mode']);
									$info['bitrate']               = $info['audio']['bitrate'];
								}
							}
						}
						unset($getid3_mp3, $getid3_temp);
						$info['avdataend'] = $OldAVDataEnd;
						unset($OldAVDataEnd);

}

unset($mdat_offset, $chapter_string_length, $chapter_matches);
					break;

case 'ID32': // ID3v2
					getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.tag.id3v2.php', __FILE__, true);

$getid3_temp = new getID3();
					$getid3_temp->openfile($this->getid3->filename, $this->getid3->info['filesize'], $this->getid3->fp);
					$getid3_id3v2 = new getid3_id3v2($getid3_temp);
					$getid3_id3v2->StartingOffset = $atom_structure['offset'] + 14; // framelength(4)+framename(4)+flags(4)+??(2)
					if ($atom_structure['valid'] = $getid3_id3v2->Analyze()) {
						$atom_structure['id3v2'] = $getid3_temp->info['id3v2'];
					} else {
						$this->warning('ID32 frame at offset '.$atom_structure['offset'].' did not parse');
					}
					unset($getid3_temp, $getid3_id3v2);
					break;

case 'free': // FREE space atom
				case 'skip': // SKIP atom
				case 'wide': // 64-bit expansion placeholder atom
					// 'free', 'skip' and 'wide' are just padding, contains no useful data at all

// When writing QuickTime files, it is sometimes necessary to update an atom's size.
					// It is impossible to update a 32-bit atom to a 64-bit atom since the 32-bit atom
					// is only 8 bytes in size, and the 64-bit atom requires 16 bytes. Therefore, QuickTime
					// puts an 8-byte placeholder atom before any atoms it may have to update the size of.
					// In this way, if the atom needs to be converted from a 32-bit to a 64-bit atom, the
					// placeholder atom can be overwritten to obtain the necessary 8 extra bytes.
					// The placeholder atom has a type of kWideAtomPlaceholderType ( 'wide' ).
					break;

case 'nsav': // NoSAVe atom
					// http://developer.apple.com/technotes/tn/tn2038.html
					$atom_structure['data'] = getid3_lib::BigEndian2Int(substr($atom_data,  0, 4));
					break;

case 'ctyp': // Controller TYPe atom (seen on QTVR)
					// http://homepages.slingshot.co.nz/~helmboy/quicktime/formats/qtm-layout.txt
					// some controller names are:
					//   0x00 + 'std' for linear movie
					//   'none' for no controls
					$atom_structure['ctyp'] = substr($atom_data, 0, 4);
					$info['quicktime']['controller'] = $atom_structure['ctyp'];
					switch ($atom_structure['ctyp']) {
						case 'qtvr':
							$info['video']['dataformat'] = 'quicktimevr';
							break;
					}
					break;

case 'pano': // PANOrama track (seen on QTVR)
					$atom_structure['pano'] = getid3_lib::BigEndian2Int(substr($atom_data,  0, 4));
					break;

case 'hint': // HINT track
				case 'hinf': //
				case 'hinv': //
				case 'hnti': //
					$info['quicktime']['hinting'] = true;
					break;

case 'imgt': // IMaGe Track reference (kQTVRImageTrackRefType) (seen on QTVR)
					for ($i = 0; $i < ($atom_structure['size'] - 8); $i += 4) {
						$atom_structure['imgt'][] = getid3_lib::BigEndian2Int(substr($atom_data, $i, 4));
					}
					break;

// Observed-but-not-handled atom types are just listed here to prevent warnings being generated
				case 'FXTC': // Something to do with Adobe After Effects (?)
				case 'PrmA':
				case 'code':
				case 'FIEL': // this is NOT "fiel" (Field Ordering) as describe here: http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap3/chapter_4_section_2.html
				case 'tapt': // TrackApertureModeDimensionsAID - http://developer.apple.com/documentation/QuickTime/Reference/QT7-1_Update_Reference/Constants/Constants.html
							// tapt seems to be used to compute the video size [https://www.getid3.org/phpBB3/viewtopic.php?t=838]
							// * http://lists.apple.com/archives/quicktime-api/2006/Aug/msg00014.html
							// * http://handbrake.fr/irclogs/handbrake-dev/handbrake-dev20080128_pg2.html
				case 'ctts'://  STCompositionOffsetAID             - http://developer.apple.com/documentation/QuickTime/Reference/QTRef_Constants/Reference/reference.html
				case 'cslg'://  STCompositionShiftLeastGreatestAID - http://developer.apple.com/documentation/QuickTime/Reference/QTRef_Constants/Reference/reference.html
				case 'sdtp'://  STSampleDependencyAID              - http://developer.apple.com/documentation/QuickTime/Reference/QTRef_Constants/Reference/reference.html
				case 'stps'://  STPartialSyncSampleAID             - http://developer.apple.com/documentation/QuickTime/Reference/QTRef_Constants/Reference/reference.html
					//$atom_structure['data'] = $atom_data;
					break;

case "\xA9".'xyz':  // GPS latitude+longitude+altitude
					$atom_structure['data'] = $atom_data;
					if (preg_match('#([\\+\\-][0-9\\.]+)([\\+\\-][0-9\\.]+)([\\+\\-][0-9\\.]+)?/$#i', $atom_data, $matches)) {
						@list($all, $latitude, $longitude, $altitude) = $matches;
						$info['quicktime']['comments']['gps_latitude'][]  = floatval($latitude);
						$info['quicktime']['comments']['gps_longitude'][] = floatval($longitude);
						if (!empty($altitude)) { // @phpstan-ignore-line
							$info['quicktime']['comments']['gps_altitude'][] = floatval($altitude);
						}
					} else {
						$this->warning('QuickTime atom "©xyz" data does not match expected data pattern at offset '.$baseoffset.'. Please report as getID3() bug.');
					}
					break;

case 'NCDT':
					// https://exiftool.org/TagNames/Nikon.html
					// Nikon-specific QuickTime tags found in the NCDT atom of MOV videos from some Nikon cameras such as the Coolpix S8000 and D5100
					$atom_structure['subatoms'] = $this->QuicktimeParseContainerAtom($atom_data, $baseoffset + 4, $atomHierarchy, $ParseAllPossibleAtoms);
					break;
				case 'NCTH': // Nikon Camera THumbnail image
				case 'NCVW': // Nikon Camera preVieW image
				case 'NCM1': // Nikon Camera preview iMage 1
				case 'NCM2': // Nikon Camera preview iMage 2
					// https://exiftool.org/TagNames/Nikon.html
					if (preg_match('/^\xFF\xD8\xFF/', $atom_data)) {
						$descriptions = array(
							'NCTH' => 'Nikon Camera Thumbnail Image',
							'NCVW' => 'Nikon Camera Preview Image',
							'NCM1' => 'Nikon Camera Preview Image 1',
							'NCM2' => 'Nikon Camera Preview Image 2',
						);
						$atom_structure['data'] = $atom_data;
						$atom_structure['image_mime'] = 'image/jpeg';
						$atom_structure['description'] = $descriptions[$atomname];
						$info['quicktime']['comments']['picture'][] = array(
							'image_mime' => $atom_structure['image_mime'],
							'data' => $atom_data,
							'description' => $atom_structure['description']
						);
					}
					break;
				case 'NCTG': // Nikon - https://exiftool.org/TagNames/Nikon.html#NCTG
					getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.tag.nikon-nctg.php', __FILE__, true);
					$nikonNCTG = new getid3_tag_nikon_nctg($this->getid3);

$atom_structure['data'] = $nikonNCTG->parse($atom_data);
					break;
				case 'NCHD': // Nikon:MakerNoteVersion  - https://exiftool.org/TagNames/Nikon.html
					$makerNoteVersion = '';
					for ($i = 0, $iMax = strlen($atom_data); $i < $iMax; ++$i) {
						if (ord($atom_data[$i]) <= 0x1F) {
							$makerNoteVersion .= ' '.ord($atom_data[$i]);
						} else {
							$makerNoteVersion .= $atom_data[$i];
						}
					}
					$makerNoteVersion = rtrim($makerNoteVersion, "\x00");
					$atom_structure['data'] = array(
						'MakerNoteVersion' => $makerNoteVersion
					);
					break;
				case 'NCDB': // Nikon                   - https://exiftool.org/TagNames/Nikon.html
				case 'CNCV': // Canon:CompressorVersion - https://exiftool.org/TagNames/Canon.html
					$atom_structure['data'] = $atom_data;
					break;

case "\x00\x00\x00\x00":
					// some kind of metacontainer, may contain a big data dump such as:
					// mdta keys \005 mdtacom.apple.quicktime.make (mdtacom.apple.quicktime.creationdate ,mdtacom.apple.quicktime.location.ISO6709 $mdtacom.apple.quicktime.software !mdtacom.apple.quicktime.model ilst \01D \001 \015data \001DE\010Apple 0 \002 (data \001DE\0102011-05-11T17:54:04+0200 2 \003 *data \001DE\010+52.4936+013.3897+040.247/ \01D \004 \015data \001DE\0104.3.1 \005 \018data \001DE\010iPhone 4
					// https://xhelmboyx.tripod.com/formats/qti-layout.txt

$atom_structure['version']   =          getid3_lib::BigEndian2Int(substr($atom_data, 0, 1));
					$atom_structure['flags_raw'] =          getid3_lib::BigEndian2Int(substr($atom_data, 1, 3));
					$atom_structure['subatoms']  = $this->QuicktimeParseContainerAtom(substr($atom_data, 4), $baseoffset + 8, $atomHierarchy, $ParseAllPossibleAtoms);
					//$atom_structure['subatoms']  = $this->QuicktimeParseContainerAtom($atom_data, $baseoffset + 8, $atomHierarchy, $ParseAllPossibleAtoms);
					break;

case 'meta': // METAdata atom
					// https://developer.apple.com/library/mac/documentation/QuickTime/QTFF/Metadata/Metadata.html

case 'data': // metaDATA atom
					// seems to be 2 bytes language code (ASCII), 2 bytes unknown (set to 0x10B5 in sample I have), remainder is useful data
					$atom_structure['language'] =                           substr($atom_data, 4 + 0, 2);
					$atom_structure['unknown']  = getid3_lib::BigEndian2Int(substr($atom_data, 4 + 2, 2));
					$atom_structure['data']     =                           substr($atom_data, 4 + 4);
					$atom_structure['key_name'] = (isset($info['quicktime']['temp_meta_key_names'][$this->metaDATAkey]) ? $info['quicktime']['temp_meta_key_names'][$this->metaDATAkey] : '');
					$this->metaDATAkey++;

switch ($atom_structure['key_name']) {
						case 'com.android.capture.fps':
							$atom_structure['data'] = getid3_lib::BigEndian2Float($atom_structure['data']);
							break;
					}

if ($atom_structure['key_name'] && $atom_structure['data']) {
						@$info['quicktime']['comments'][str_replace('com.android.', '', str_replace('com.apple.quicktime.', '', $atom_structure['key_name']))][] = $atom_structure['data'];
					}
					break;

case 'keys': // KEYS that may be present in the metadata atom.
					// https://developer.apple.com/library/mac/documentation/QuickTime/QTFF/Metadata/Metadata.html#//apple_ref/doc/uid/TP40000939-CH1-SW21
					// The metadata item keys atom holds a list of the metadata keys that may be present in the metadata atom.
					// This list is indexed starting with 1; 0 is a reserved index value. The metadata item keys atom is a full atom with an atom type of "keys".
					$atom_structure['version']       = getid3_lib::BigEndian2Int(substr($atom_data,  0, 1));
					$atom_structure['flags_raw']     = getid3_lib::BigEndian2Int(substr($atom_data,  1, 3));
					$atom_structure['entry_count']   = getid3_lib::BigEndian2Int(substr($atom_data,  4, 4));
					$keys_atom_offset = 8;
					for ($i = 1; $i <= $atom_structure['entry_count']; $i++) {
						$atom_structure['keys'][$i]['key_size']      = getid3_lib::BigEndian2Int(substr($atom_data, $keys_atom_offset + 0, 4));
						$atom_structure['keys'][$i]['key_namespace'] =                           substr($atom_data, $keys_atom_offset + 4, 4);
						$atom_structure['keys'][$i]['key_value']     =                           substr($atom_data, $keys_atom_offset + 8, $atom_structure['keys'][$i]['key_size'] - 8);
						$keys_atom_offset += $atom_structure['keys'][$i]['key_size']; // key_size includes the 4+4 bytes for key_size and key_namespace

$info['quicktime']['temp_meta_key_names'][$i] = $atom_structure['keys'][$i]['key_value'];
					}
					break;

case 'uuid': // user-defined atom often seen containing XML data, also used for potentially many other purposes, only a few specifically handled by getID3 (e.g. 360fly spatial data)
					//Get the UUID ID in first 16 bytes
					$uuid_bytes_read = unpack('H8time_low/H4time_mid/H4time_hi/H4clock_seq_hi/H12clock_seq_low', substr($atom_data, 0, 16));
					$atom_structure['uuid_field_id'] = implode('-', $uuid_bytes_read);

switch ($atom_structure['uuid_field_id']) {   // http://fileformats.archiveteam.org/wiki/Boxes/atoms_format#UUID_boxes

case '0537cdab-9d0c-4431-a72a-fa561f2a113e': // Exif                                       - http://fileformats.archiveteam.org/wiki/Exif
						case '2c4c0100-8504-40b9-a03e-562148d6dfeb': // Photoshop Image Resources                  - http://fileformats.archiveteam.org/wiki/Photoshop_Image_Resources
						case '33c7a4d2-b81d-4723-a0ba-f1a3e097ad38': // IPTC-IIM                                   - http://fileformats.archiveteam.org/wiki/IPTC-IIM
						case '8974dbce-7be7-4c51-84f9-7148f9882554': // PIFF Track Encryption Box                  - http://fileformats.archiveteam.org/wiki/Protected_Interoperable_File_Format
						case '96a9f1f1-dc98-402d-a7ae-d68e34451809': // GeoJP2 World File Box                      - http://fileformats.archiveteam.org/wiki/GeoJP2
						case 'a2394f52-5a9b-4f14-a244-6c427c648df4': // PIFF Sample Encryption Box                 - http://fileformats.archiveteam.org/wiki/Protected_Interoperable_File_Format
						case 'b14bf8bd-083d-4b43-a5ae-8cd7d5a6ce03': // GeoJP2 GeoTIFF Box                         - http://fileformats.archiveteam.org/wiki/GeoJP2
						case 'd08a4f18-10f3-4a82-b6c8-32d8aba183d3': // PIFF Protection System Specific Header Box - http://fileformats.archiveteam.org/wiki/Protected_Interoperable_File_Format
							$this->warning('Unhandled (but recognized) "uuid" atom identified by "'.$atom_structure['uuid_field_id'].'" at offset '.$atom_structure['offset'].' ('.strlen($atom_data).' bytes)');
							break;

case 'be7acfcb-97a9-42e8-9c71-999491e3afac': // XMP data (in XML format)
							$atom_structure['xml'] = substr($atom_data, 16, strlen($atom_data) - 16 - 8); // 16 bytes for UUID, 8 bytes header(?)
							break;

case 'efe1589a-bb77-49ef-8095-27759eb1dc6f': // 360fly data
							/* 360fly code in this block by Paul Lewis 2019-Oct-31 */
							/*	Sensor Timestamps need to be calculated using the recordings base time at ['quicktime']['moov']['subatoms'][0]['creation_time_unix']. */
							$atom_structure['title'] = '360Fly Sensor Data';

//Get the UUID HEADER data
							$uuid_bytes_read = unpack('vheader_size/vheader_version/vtimescale/vhardware_version/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/', substr($atom_data, 16, 32));
							$atom_structure['uuid_header'] = $uuid_bytes_read;

$start_byte = 48;
							$atom_SENSOR_data = substr($atom_data, $start_byte);
							$atom_structure['sensor_data']['data_type'] = array(
									'fusion_count'   => 0,       // ID 250
									'fusion_data'    => array(),
									'accel_count'    => 0,       // ID 1
									'accel_data'     => array(),
									'gyro_count'     => 0,       // ID 2
									'gyro_data'      => array(),
									'magno_count'    => 0,       // ID 3
									'magno_data'     => array(),
									'gps_count'      => 0,       // ID 5
									'gps_data'       => array(),
									'rotation_count' => 0,       // ID 6
									'rotation_data'  => array(),
									'unknown_count'  => 0,       // ID ??
									'unknown_data'   => array(),
									'debug_list'     => '',      // Used to debug variables stored as comma delimited strings
							);
							$debug_structure = array();
							$debug_structure['debug_items'] = array();
							// Can start loop here to decode all sensor data in 32 Byte chunks:
							foreach (str_split($atom_SENSOR_data, 32) as $sensor_key => $sensor_data) {
								// This gets me a data_type code to work out what data is in the next 31 bytes.
								$sensor_data_type = substr($sensor_data, 0, 1);
								$sensor_data_content = substr($sensor_data, 1);
								$uuid_bytes_read = unpack('C*', $sensor_data_type);
								$sensor_data_array = array();
								switch ($uuid_bytes_read[1]) {
									case 250:
										$atom_structure['sensor_data']['data_type']['fusion_count']++;
										$uuid_bytes_read = unpack('cmode/Jtimestamp/Gyaw/Gpitch/Groll/x*', $sensor_data_content);
										$sensor_data_array['mode']      = $uuid_bytes_read['mode'];
										$sensor_data_array['timestamp'] = $uuid_bytes_read['timestamp'];
										$sensor_data_array['yaw']       = $uuid_bytes_read['yaw'];
										$sensor_data_array['pitch']     = $uuid_bytes_read['pitch'];
										$sensor_data_array['roll']      = $uuid_bytes_read['roll'];
										array_push($atom_structure['sensor_data']['data_type']['fusion_data'], $sensor_data_array);
										break;
									case 1:
										$atom_structure['sensor_data']['data_type']['accel_count']++;
										$uuid_bytes_read = unpack('cmode/Jtimestamp/Gyaw/Gpitch/Groll/x*', $sensor_data_content);
										$sensor_data_array['mode']      = $uuid_bytes_read['mode'];
										$sensor_data_array['timestamp'] = $uuid_bytes_read['timestamp'];
										$sensor_data_array['yaw']       = $uuid_bytes_read['yaw'];
										$sensor_data_array['pitch']     = $uuid_bytes_read['pitch'];
										$sensor_data_array['roll']      = $uuid_bytes_read['roll'];
										array_push($atom_structure['sensor_data']['data_type']['accel_data'], $sensor_data_array);
										break;
									case 2:
										$atom_structure['sensor_data']['data_type']['gyro_count']++;
										$uuid_bytes_read = unpack('cmode/Jtimestamp/Gyaw/Gpitch/Groll/x*', $sensor_data_content);
										$sensor_data_array['mode']      = $uuid_bytes_read['mode'];
										$sensor_data_array['timestamp'] = $uuid_bytes_read['timestamp'];
										$sensor_data_array['yaw']       = $uuid_bytes_read['yaw'];
										$sensor_data_array['pitch']     = $uuid_bytes_read['pitch'];
										$sensor_data_array['roll']      = $uuid_bytes_read['roll'];
										array_push($atom_structure['sensor_data']['data_type']['gyro_data'], $sensor_data_array);
										break;
									case 3:
										$atom_structure['sensor_data']['data_type']['magno_count']++;
										$uuid_bytes_read = unpack('cmode/Jtimestamp/Gmagx/Gmagy/Gmagz/x*', $sensor_data_content);
										$sensor_data_array['mode']      = $uuid_bytes_read['mode'];
										$sensor_data_array['timestamp'] = $uuid_bytes_read['timestamp'];
										$sensor_data_array['magx']      = $uuid_bytes_read['magx'];
										$sensor_data_array['magy']      = $uuid_bytes_read['magy'];
										$sensor_data_array['magz']      = $uuid_bytes_read['magz'];
										array_push($atom_structure['sensor_data']['data_type']['magno_data'], $sensor_data_array);
										break;
									case 5:
										$atom_structure['sensor_data']['data_type']['gps_count']++;
										$uuid_bytes_read = unpack('cmode/Jtimestamp/Glat/Glon/Galt/Gspeed/nbearing/nacc/x*', $sensor_data_content);
										$sensor_data_array['mode']      = $uuid_bytes_read['mode'];
										$sensor_data_array['timestamp'] = $uuid_bytes_read['timestamp'];
										$sensor_data_array['lat']       = $uuid_bytes_read['lat'];
										$sensor_data_array['lon']       = $uuid_bytes_read['lon'];
										$sensor_data_array['alt']       = $uuid_bytes_read['alt'];
										$sensor_data_array['speed']     = $uuid_bytes_read['speed'];
										$sensor_data_array['bearing']   = $uuid_bytes_read['bearing'];
										$sensor_data_array['acc']       = $uuid_bytes_read['acc'];
										array_push($atom_structure['sensor_data']['data_type']['gps_data'], $sensor_data_array);
										//array_push($debug_structure['debug_items'], $uuid_bytes_read['timestamp']);
										break;
									case 6:
										$atom_structure['sensor_data']['data_type']['rotation_count']++;
										$uuid_bytes_read = unpack('cmode/Jtimestamp/Grotx/Groty/Grotz/x*', $sensor_data_content);
										$sensor_data_array['mode']      = $uuid_bytes_read['mode'];
										$sensor_data_array['timestamp'] = $uuid_bytes_read['timestamp'];
										$sensor_data_array['rotx']      = $uuid_bytes_read['rotx'];
										$sensor_data_array['roty']      = $uuid_bytes_read['roty'];
										$sensor_data_array['rotz']      = $uuid_bytes_read['rotz'];
										array_push($atom_structure['sensor_data']['data_type']['rotation_data'], $sensor_data_array);
										break;
									default:
										$atom_structure['sensor_data']['data_type']['unknown_count']++;
										break;
								}
							}
							//if (isset($debug_structure['debug_items']) && count($debug_structure['debug_items']) > 0) {
							//	$atom_structure['sensor_data']['data_type']['debug_list'] = implode(',', $debug_structure['debug_items']);
							//} else {
								$atom_structure['sensor_data']['data_type']['debug_list'] = 'No debug items in list!';
							//}
							break;

default:
							$this->warning('Unhandled "uuid" atom identified by "'.$atom_structure['uuid_field_id'].'" at offset '.$atom_structure['offset'].' ('.strlen($atom_data).' bytes)');
					}
					break;

case 'gps ':
					// https://dashcamtalk.com/forum/threads/script-to-extract-gps-data-from-novatek-mp4.20808/page-2#post-291730
					// The 'gps ' contains simple look up table made up of 8byte rows, that point to the 'free' atoms that contains the actual GPS data.
					// The first row is version/metadata/notsure, I skip that.
					// The following rows consist of 4byte address (absolute) and 4byte size (0x1000), these point to the GPS data in the file.

$GPS_rowsize = 8; // 4 bytes for offset, 4 bytes for size
					if (strlen($atom_data) > 0) {
						if ((strlen($atom_data) % $GPS_rowsize) == 0) {
							$atom_structure['gps_toc'] = array();
							foreach (str_split($atom_data, $GPS_rowsize) as $counter => $datapair) {
								$atom_structure['gps_toc'][] = unpack('Noffset/Nsize', substr($atom_data, $counter * $GPS_rowsize, $GPS_rowsize));
							}

$atom_structure['gps_entries'] = array();
							$previous_offset = $this->ftell();
							foreach ($atom_structure['gps_toc'] as $key => $gps_pointer) {
								if ($key == 0) {
									// "The first row is version/metadata/notsure, I skip that."
									continue;
								}
								$this->fseek($gps_pointer['offset']);
								$GPS_free_data = $this->fread($gps_pointer['size']);

/*
								// 2017-05-10: I see some of the data, notably the Hour-Minute-Second, but cannot reconcile the rest of the data. However, the NMEA "GPRMC" line is there and relatively easy to parse, so I'm using that instead

// https://dashcamtalk.com/forum/threads/script-to-extract-gps-data-from-novatek-mp4.20808/page-2#post-291730
								// The structure of the GPS data atom (the 'free' atoms mentioned above) is following:
								// hour,minute,second,year,month,day,active,latitude_b,longitude_b,unknown2,latitude,longitude,speed = struct.unpack_from('<IIIIIIssssfff',data, 48)
								// For those unfamiliar with python struct:
								// I = int
								// s = is string (size 1, in this case)
								// f = float

//$atom_structure['gps_entries'][$key] = unpack('Vhour/Vminute/Vsecond/Vyear/Vmonth/Vday/Vactive/Vlatitude_b/Vlongitude_b/Vunknown2/flatitude/flongitude/fspeed', substr($GPS_free_data, 48));
								*/

// $GPRMC,081836,A,3751.65,S,14507.36,E,000.0,360.0,130998,011.3,E*62
								// $GPRMC,183731,A,3907.482,N,12102.436,W,000.0,360.0,080301,015.5,E*67
								// $GPRMC,002454,A,3553.5295,N,13938.6570,E,0.0,43.1,180700,7.1,W,A*3F
								// $GPRMC,094347.000,A,5342.0061,N,00737.9908,W,0.01,156.75,140217,,,A*7D
								if (preg_match('#\\$GPRMC,([0-9\\.]*),([AV]),([0-9\\.]*),([NS]),([0-9\\.]*),([EW]),([0-9\\.]*),([0-9\\.]*),([0-9]*),([0-9\\.]*),([EW]?)(,[A])?(\\*[0-9A-F]{2})#', $GPS_free_data, $matches)) {
									$GPS_this_GPRMC = array();
									$GPS_this_GPRMC_raw = array();
									list(
										$GPS_this_GPRMC_raw['gprmc'],
										$GPS_this_GPRMC_raw['timestamp'],
										$GPS_this_GPRMC_raw['status'],
										$GPS_this_GPRMC_raw['latitude'],
										$GPS_this_GPRMC_raw['latitude_direction'],
										$GPS_this_GPRMC_raw['longitude'],
										$GPS_this_GPRMC_raw['longitude_direction'],
										$GPS_this_GPRMC_raw['knots'],
										$GPS_this_GPRMC_raw['angle'],
										$GPS_this_GPRMC_raw['datestamp'],
										$GPS_this_GPRMC_raw['variation'],
										$GPS_this_GPRMC_raw['variation_direction'],
										$dummy,
										$GPS_this_GPRMC_raw['checksum'],
									) = $matches;
									$GPS_this_GPRMC['raw'] = $GPS_this_GPRMC_raw;

$hour   = substr($GPS_this_GPRMC['raw']['timestamp'], 0, 2);
									$minute = substr($GPS_this_GPRMC['raw']['timestamp'], 2, 2);
									$second = substr($GPS_this_GPRMC['raw']['timestamp'], 4, 2);
									$ms     = substr($GPS_this_GPRMC['raw']['timestamp'], 6);    // may contain decimal seconds
									$day    = substr($GPS_this_GPRMC['raw']['datestamp'], 0, 2);
									$month  = substr($GPS_this_GPRMC['raw']['datestamp'], 2, 2);
									$year   = (int) substr($GPS_this_GPRMC['raw']['datestamp'], 4, 2);
									$year += (($year > 90) ? 1900 : 2000); // complete lack of foresight: datestamps are stored with 2-digit years, take best guess
									$GPS_this_GPRMC['timestamp'] = $year.'-'.$month.'-'.$day.' '.$hour.':'.$minute.':'.$second.$ms;

$GPS_this_GPRMC['active'] = ($GPS_this_GPRMC['raw']['status'] == 'A'); // A=Active,V=Void

foreach (array('latitude','longitude') as $latlon) {
										preg_match('#^([0-9]{1,3})([0-9]{2}\\.[0-9]+)$#', $GPS_this_GPRMC['raw'][$latlon], $matches);
										list($dummy, $deg, $min) = $matches;
										$GPS_this_GPRMC[$latlon] = (int) $deg + ((float) $min / 60);
									}
									$GPS_this_GPRMC['latitude']  *= (($GPS_this_GPRMC['raw']['latitude_direction']  == 'S') ? -1 : 1);
									$GPS_this_GPRMC['longitude'] *= (($GPS_this_GPRMC['raw']['longitude_direction'] == 'W') ? -1 : 1);

$GPS_this_GPRMC['heading']    = $GPS_this_GPRMC['raw']['angle'];
									$GPS_this_GPRMC['speed_knot'] = $GPS_this_GPRMC['raw']['knots'];
									$GPS_this_GPRMC['speed_kmh']  = (float) $GPS_this_GPRMC['raw']['knots'] * 1.852;
									if ($GPS_this_GPRMC['raw']['variation']) {
										$GPS_this_GPRMC['variation']  = (float) $GPS_this_GPRMC['raw']['variation'];
										$GPS_this_GPRMC['variation'] *= (($GPS_this_GPRMC['raw']['variation_direction'] == 'W') ? -1 : 1);
									}

$atom_structure['gps_entries'][$key] = $GPS_this_GPRMC;

@$info['quicktime']['gps_track'][$GPS_this_GPRMC['timestamp']] = array(
										'latitude'  => (float) $GPS_this_GPRMC['latitude'],
										'longitude' => (float) $GPS_this_GPRMC['longitude'],
										'speed_kmh' => (float) $GPS_this_GPRMC['speed_kmh'],
										'heading'   => (float) $GPS_this_GPRMC['heading'],
									);

} else {
									$this->warning('Unhandled GPS format in "free" atom at offset '.$gps_pointer['offset']);
								}
							}
							$this->fseek($previous_offset);

} else {
							$this->warning('QuickTime atom "'.$atomname.'" is not mod-8 bytes long ('.$atomsize.' bytes) at offset '.$baseoffset);
						}
					} else {
						$this->warning('QuickTime atom "'.$atomname.'" is zero bytes long at offset '.$baseoffset);
					}
					break;

case 'loci':// 3GP location (El Loco)
					$loffset = 0;
					$info['quicktime']['comments']['gps_flags']     = array(  getid3_lib::BigEndian2Int(substr($atom_data, 0, 4)));
					$info['quicktime']['comments']['gps_lang']      = array(  getid3_lib::BigEndian2Int(substr($atom_data, 4, 2)));
					$info['quicktime']['comments']['gps_location']  = array(          $this->LociString(substr($atom_data, 6), $loffset));
					$loci_data = substr($atom_data, 6 + $loffset);
					$info['quicktime']['comments']['gps_role']      = array(  getid3_lib::BigEndian2Int(substr($loci_data, 0, 1)));
					$info['quicktime']['comments']['gps_longitude'] = array(getid3_lib::FixedPoint16_16(substr($loci_data, 1, 4)));
					$info['quicktime']['comments']['gps_latitude']  = array(getid3_lib::FixedPoint16_16(substr($loci_data, 5, 4)));
					$info['quicktime']['comments']['gps_altitude']  = array(getid3_lib::FixedPoint16_16(substr($loci_data, 9, 4)));
					$info['quicktime']['comments']['gps_body']      = array(          $this->LociString(substr($loci_data, 13           ), $loffset));
					$info['quicktime']['comments']['gps_notes']     = array(          $this->LociString(substr($loci_data, 13 + $loffset), $loffset));
					break;

case 'chpl': // CHaPter List
					// https://www.adobe.com/content/dam/Adobe/en/devnet/flv/pdfs/video_file_format_spec_v10.pdf
					$chpl_version = getid3_lib::BigEndian2Int(substr($atom_data, 4, 1)); // Expected to be 0
					$chpl_flags   = getid3_lib::BigEndian2Int(substr($atom_data, 5, 3)); // Reserved, set to 0
					$chpl_count   = getid3_lib::BigEndian2Int(substr($atom_data, 8, 1));
					$chpl_offset = 9;
					for ($i = 0; $i < $chpl_count; $i++) {
						if (($chpl_offset + 9) >= strlen($atom_data)) {
							$this->warning('QuickTime chapter '.$i.' extends beyond end of "chpl" atom');
							break;
						}
						$info['quicktime']['chapters'][$i]['timestamp'] = getid3_lib::BigEndian2Int(substr($atom_data, $chpl_offset, 8)) / 10000000; // timestamps are stored as 100-nanosecond units
						$chpl_offset += 8;
						$chpl_title_size = getid3_lib::BigEndian2Int(substr($atom_data, $chpl_offset, 1));
						$chpl_offset += 1;
						$info['quicktime']['chapters'][$i]['title']     =                           substr($atom_data, $chpl_offset, $chpl_title_size);
						$chpl_offset += $chpl_title_size;
					}
					break;

case 'FIRM': // FIRMware version(?), seen on GoPro Hero4
					$info['quicktime']['camera']['firmware'] = $atom_data;
					break;

case 'CAME': // FIRMware version(?), seen on GoPro Hero4
					$info['quicktime']['camera']['serial_hash'] = unpack('H*', $atom_data);
					break;

case 'dscp':
				case 'rcif':
					// https://www.getid3.org/phpBB3/viewtopic.php?t=1908
					if (substr($atom_data, 0, 7) == "\x00\x00\x00\x00\x55\xC4".'{') {
						if ($json_decoded = @json_decode(rtrim(substr($atom_data, 6), "\x00"), true)) {
							$info['quicktime']['camera'][$atomname] = $json_decoded;
							if (($atomname == 'rcif') && isset($info['quicktime']['camera']['rcif']['wxcamera']['rotate'])) {
								$info['video']['rotate'] = $info['quicktime']['video']['rotate'] = $info['quicktime']['camera']['rcif']['wxcamera']['rotate'];
							}
						} else {
							$this->warning('Failed to JSON decode atom "'.$atomname.'"');
							$atom_structure['data'] = $atom_data;
						}
						unset($json_decoded);
					} else {
						$this->warning('Expecting 55 C4 7B at start of atom "'.$atomname.'", found '.getid3_lib::PrintHexBytes(substr($atom_data, 4, 3)).' instead');
						$atom_structure['data'] = $atom_data;
					}
					break;

case 'frea':
					// https://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/Kodak.html#frea
					// may contain "scra" (PreviewImage) and/or "thma" (ThumbnailImage)
					$atom_structure['subatoms'] = $this->QuicktimeParseContainerAtom($atom_data, $baseoffset + 4, $atomHierarchy, $ParseAllPossibleAtoms);
					break;
				case 'tima': // subatom to "frea"
					// no idea what this does, the one sample file I've seen has a value of 0x00000027
					$atom_structure['data'] = $atom_data;
					break;
				case 'ver ': // subatom to "frea"
					// some kind of version number, the one sample file I've seen has a value of "3.00.073"
					$atom_structure['data'] = $atom_data;
					break;
				case 'thma': // subatom to "frea" -- "ThumbnailImage"
					// https://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/Kodak.html#frea
					if (strlen($atom_data) > 0) {
						$info['quicktime']['comments']['picture'][] = array('data'=>$atom_data, 'image_mime'=>'image/jpeg', 'description'=>'ThumbnailImage');
					}
					break;
				case 'scra': // subatom to "frea" -- "PreviewImage"
					// https://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/Kodak.html#frea
					// but the only sample file I've seen has no useful data here
					if (strlen($atom_data) > 0) {
						$info['quicktime']['comments']['picture'][] = array('data'=>$atom_data, 'image_mime'=>'image/jpeg', 'description'=>'PreviewImage');
					}
					break;

case 'cdsc': // timed metadata reference
					// A QuickTime movie can contain none, one, or several timed metadata tracks. Timed metadata tracks can refer to multiple tracks.
					// Metadata tracks are linked to the tracks they describe using a track-reference of type 'cdsc'. The metadata track holds the 'cdsc' track reference.
					$atom_structure['track_number'] = getid3_lib::BigEndian2Int($atom_data);
					break;

case 'esds': // Elementary Stream DeScriptor
					// https://github.com/JamesHeinrich/getID3/issues/414
					// https://chromium.googlesource.com/chromium/src/media/+/refs/heads/main/formats/mp4/es_descriptor.cc
					// https://chromium.googlesource.com/chromium/src/media/+/refs/heads/main/formats/mp4/es_descriptor.h
					$atom_structure['version']   = getid3_lib::BigEndian2Int(substr($atom_data,  0, 1)); // hardcoded: 0x00
					$atom_structure['flags_raw'] = getid3_lib::BigEndian2Int(substr($atom_data,  1, 3)); // hardcoded: 0x000000
					$esds_offset = 4;

$atom_structure['ES_DescrTag'] = getid3_lib::BigEndian2Int(substr($atom_data, $esds_offset, 1));
					$esds_offset += 1;
					if ($atom_structure['ES_DescrTag'] != 0x03) {
						$this->warning('expecting esds.ES_DescrTag = 0x03, found 0x'.sprintf('%02X', $atom_structure['ES_DescrTag']).', at offset '.$atom_structure['offset']);
						break;
					}
					$atom_structure['ES_DescrSize'] = $this->quicktime_read_mp4_descr_length($atom_data, $esds_offset);

$atom_structure['ES_ID'] = getid3_lib::BigEndian2Int(substr($atom_data, $esds_offset, 2));
					$esds_offset += 2;
					$atom_structure['ES_flagsraw'] = getid3_lib::BigEndian2Int(substr($atom_data, $esds_offset, 1));
					$esds_offset += 1;
					$atom_structure['ES_flags']['stream_dependency'] = (bool) ($atom_structure['ES_flagsraw'] & 0x80);
					$atom_structure['ES_flags']['url_flag']          = (bool) ($atom_structure['ES_flagsraw'] & 0x40);
					$atom_structure['ES_flags']['ocr_stream']        = (bool) ($atom_structure['ES_flagsraw'] & 0x20);
					$atom_structure['ES_stream_priority']            =        ($atom_structure['ES_flagsraw'] & 0x1F);
					if ($atom_structure['ES_flags']['url_flag']) {
						$this->warning('Unsupported esds.url_flag enabled at offset '.$atom_structure['offset']);
						break;
					}
					if ($atom_structure['ES_flags']['stream_dependency']) {
						$atom_structure['ES_dependsOn_ES_ID'] = getid3_lib::BigEndian2Int(substr($atom_data, $esds_offset, 2));
						$esds_offset += 2;
					}
					if ($atom_structure['ES_flags']['ocr_stream']) {
						$atom_structure['ES_OCR_ES_Id'] = getid3_lib::BigEndian2Int(substr($atom_data, $esds_offset, 2));
						$esds_offset += 2;
					}

$atom_structure['ES_DecoderConfigDescrTag'] = getid3_lib::BigEndian2Int(substr($atom_data, $esds_offset, 1));
					$esds_offset += 1;
					if ($atom_structure['ES_DecoderConfigDescrTag'] != 0x04) {
						$this->warning('expecting esds.ES_DecoderConfigDescrTag = 0x04, found 0x'.sprintf('%02X', $atom_structure['ES_DecoderConfigDescrTag']).', at offset '.$atom_structure['offset']);
						break;
					}
					$atom_structure['ES_DecoderConfigDescrTagSize'] = $this->quicktime_read_mp4_descr_length($atom_data, $esds_offset);

$atom_structure['ES_objectTypeIndication'] = getid3_lib::BigEndian2Int(substr($atom_data, $esds_offset, 1));
					$esds_offset += 1;
					// https://stackoverflow.com/questions/3987850
					// 0x40 = "Audio ISO/IEC 14496-3"                       = MPEG-4 Audio
					// 0x67 = "Audio ISO/IEC 13818-7 LowComplexity Profile" = MPEG-2 AAC LC
					// 0x69 = "Audio ISO/IEC 13818-3"                       = MPEG-2 Backward Compatible Audio (MPEG-2 Layers 1, 2, and 3)
					// 0x6B = "Audio ISO/IEC 11172-3"                       = MPEG-1 Audio (MPEG-1 Layers 1, 2, and 3)

$streamTypePlusFlags = getid3_lib::BigEndian2Int(substr($atom_data, $esds_offset, 1));
					$esds_offset += 1;
					$atom_structure['ES_streamType'] =        ($streamTypePlusFlags & 0xFC) >> 2;
					$atom_structure['ES_upStream']   = (bool) ($streamTypePlusFlags & 0x02) >> 1;
					$atom_structure['ES_bufferSizeDB'] = getid3_lib::BigEndian2Int(substr($atom_data, $esds_offset, 3));
					$esds_offset += 3;
					$atom_structure['ES_maxBitrate'] = getid3_lib::BigEndian2Int(substr($atom_data, $esds_offset, 4));
					$esds_offset += 4;
					$atom_structure['ES_avgBitrate'] = getid3_lib::BigEndian2Int(substr($atom_data, $esds_offset, 4));
					$esds_offset += 4;
					if ($atom_structure['ES_avgBitrate']) {
						$info['quicktime']['audio']['bitrate'] = $atom_structure['ES_avgBitrate'];
						$info['audio']['bitrate']              = $atom_structure['ES_avgBitrate'];
					}

$atom_structure['ES_DecSpecificInfoTag'] = getid3_lib::BigEndian2Int(substr($atom_data, $esds_offset, 1));
					$esds_offset += 1;
					if ($atom_structure['ES_DecSpecificInfoTag'] != 0x05) {
						$this->warning('expecting esds.ES_DecSpecificInfoTag = 0x05, found 0x'.sprintf('%02X', $atom_structure['ES_DecSpecificInfoTag']).', at offset '.$atom_structure['offset']);
						break;
					}
					$atom_structure['ES_DecSpecificInfoTagSize'] = $this->quicktime_read_mp4_descr_length($atom_data, $esds_offset);

$atom_structure['ES_DecSpecificInfo'] = getid3_lib::BigEndian2Int(substr($atom_data, $esds_offset, $atom_structure['ES_DecSpecificInfoTagSize']));
					$esds_offset += $atom_structure['ES_DecSpecificInfoTagSize'];

$atom_structure['ES_SLConfigDescrTag'] = getid3_lib::BigEndian2Int(substr($atom_data, $esds_offset, 1));
					$esds_offset += 1;
					if ($atom_structure['ES_SLConfigDescrTag'] != 0x06) {
						$this->warning('expecting esds.ES_SLConfigDescrTag = 0x05, found 0x'.sprintf('%02X', $atom_structure['ES_SLConfigDescrTag']).', at offset '.$atom_structure['offset']);
						break;
					}
					$atom_structure['ES_SLConfigDescrTagSize'] = $this->quicktime_read_mp4_descr_length($atom_data, $esds_offset);

$atom_structure['ES_SLConfigDescr'] = getid3_lib::BigEndian2Int(substr($atom_data, $esds_offset, $atom_structure['ES_SLConfigDescrTagSize']));
					$esds_offset += $atom_structure['ES_SLConfigDescrTagSize'];
					break;

// AVIF-related - https://docs.rs/avif-parse/0.13.2/src/avif_parse/boxes.rs.html
				case 'pitm': // Primary ITeM
				case 'iloc': // Item LOCation
				case 'iinf': // Item INFo
				case 'iref': // Image REFerence
				case 'iprp': // Image PRoPerties
$this->error('AVIF files not currently supported');
					$atom_structure['data'] = $atom_data;
					break;

case 'tfdt': // Track Fragment base media Decode Time box
				case 'tfhd': // Track Fragment HeaDer box
				case 'mfhd': // Movie Fragment HeaDer box
				case 'trun': // Track fragment RUN box
$this->error('fragmented mp4 files not currently supported');
					$atom_structure['data'] = $atom_data;
					break;

case 'mvex': // MoVie EXtends box
				case 'pssh': // Protection System Specific Header box
				case 'sidx': // Segment InDeX box
				default:
					$this->warning('Unknown QuickTime atom type: "'.preg_replace('#[^a-zA-Z0-9 _\\-]#', '?', $atomname).'" ('.trim(getid3_lib::PrintHexBytes($atomname)).'), '.$atomsize.' bytes at offset '.$baseoffset);
					$atom_structure['data'] = $atom_data;
					break;
			}
		}
		array_pop($atomHierarchy);
		return $atom_structure;
	}

/**
	 * @param string $atom_data
	 * @param int    $baseoffset
	 * @param array  $atomHierarchy
	 * @param bool   $ParseAllPossibleAtoms
	 *
	 * @return array|false
	 */
	public function QuicktimeParseContainerAtom($atom_data, $baseoffset, &$atomHierarchy, $ParseAllPossibleAtoms) {
		$atom_structure = array();
		$subatomoffset  = 0;
		$subatomcounter = 0;
		if ((strlen($atom_data) == 4) && (getid3_lib::BigEndian2Int($atom_data) == 0x00000000)) {
			return false;
		}
		while ($subatomoffset < strlen($atom_data)) {
			$subatomsize = getid3_lib::BigEndian2Int(substr($atom_data, $subatomoffset + 0, 4));
			$subatomname =                           substr($atom_data, $subatomoffset + 4, 4);
			$subatomdata =                           substr($atom_data, $subatomoffset + 8, $subatomsize - 8);
			if ($subatomsize == 0) {
				// Furthermore, for historical reasons the list of atoms is optionally
				// terminated by a 32-bit integer set to 0. If you are writing a program
				// to read user data atoms, you should allow for the terminating 0.
				if (strlen($atom_data) > 12) {
					$subatomoffset += 4;
					continue;
				}
				break;
			}
			if (strlen($subatomdata) < ($subatomsize - 8)) {
			    // we don't have enough data to decode the subatom.
			    // this may be because we are refusing to parse large subatoms, or it may be because this atom had its size set too large
			    // so we passed in the start of a following atom incorrectly?
			    break;
			}
			$atom_structure[$subatomcounter++] = $this->QuicktimeParseAtom($subatomname, $subatomsize, $subatomdata, $baseoffset + $subatomoffset, $atomHierarchy, $ParseAllPossibleAtoms);
			$subatomoffset += $subatomsize;
		}

if (empty($atom_structure)) {
			return false;
		}

return $atom_structure;
	}

/**
	 * @param string $data
	 * @param int    $offset
	 *
	 * @return int
	 */
	public function quicktime_read_mp4_descr_length($data, &$offset) {
		// http://libquicktime.sourcearchive.com/documentation/2:1.0.2plus-pdebian-2build1/esds_8c-source.html
		$num_bytes = 0;
		$length    = 0;
		do {
			$b = ord(substr($data, $offset++, 1));
			$length = ($length << 7) | ($b & 0x7F);
		} while (($b & 0x80) && ($num_bytes++ < 4));
		return $length;
	}

/**
	 * @param int $languageid
	 *
	 * @return string
	 */
	public function QuicktimeLanguageLookup($languageid) {
		// http://developer.apple.com/library/mac/#documentation/QuickTime/QTFF/QTFFChap4/qtff4.html#//apple_ref/doc/uid/TP40000939-CH206-34353
		static $QuicktimeLanguageLookup = array();
		if (empty($QuicktimeLanguageLookup)) {
			$QuicktimeLanguageLookup[0]     = 'English';
			$QuicktimeLanguageLookup[1]     = 'French';
			$QuicktimeLanguageLookup[2]     = 'German';
			$QuicktimeLanguageLookup[3]     = 'Italian';
			$QuicktimeLanguageLookup[4]     = 'Dutch';
			$QuicktimeLanguageLookup[5]     = 'Swedish';
			$QuicktimeLanguageLookup[6]     = 'Spanish';
			$QuicktimeLanguageLookup[7]     = 'Danish';
			$QuicktimeLanguageLookup[8]     = 'Portuguese';
			$QuicktimeLanguageLookup[9]     = 'Norwegian';
			$QuicktimeLanguageLookup[10]    = 'Hebrew';
			$QuicktimeLanguageLookup[11]    = 'Japanese';
			$QuicktimeLanguageLookup[12]    = 'Arabic';
			$QuicktimeLanguageLookup[13]    = 'Finnish';
			$QuicktimeLanguageLookup[14]    = 'Greek';
			$QuicktimeLanguageLookup[15]    = 'Icelandic';
			$QuicktimeLanguageLookup[16]    = 'Maltese';
			$QuicktimeLanguageLookup[17]    = 'Turkish';
			$QuicktimeLanguageLookup[18]    = 'Croatian';
			$QuicktimeLanguageLookup[19]    = 'Chinese (Traditional)';
			$QuicktimeLanguageLookup[20]    = 'Urdu';
			$QuicktimeLanguageLookup[21]    = 'Hindi';
			$QuicktimeLanguageLookup[22]    = 'Thai';
			$QuicktimeLanguageLookup[23]    = 'Korean';
			$QuicktimeLanguageLookup[24]    = 'Lithuanian';
			$QuicktimeLanguageLookup[25]    = 'Polish';
			$QuicktimeLanguageLookup[26]    = 'Hungarian';
			$QuicktimeLanguageLookup[27]    = 'Estonian';
			$QuicktimeLanguageLookup[28]    = 'Lettish';
			$QuicktimeLanguageLookup[28]    = 'Latvian';
			$QuicktimeLanguageLookup[29]    = 'Saamisk';
			$QuicktimeLanguageLookup[29]    = 'Lappish';
			$QuicktimeLanguageLookup[30]    = 'Faeroese';
			$QuicktimeLanguageLookup[31]    = 'Farsi';
			$QuicktimeLanguageLookup[31]    = 'Persian';
			$QuicktimeLanguageLookup[32]    = 'Russian';
			$QuicktimeLanguageLookup[33]    = 'Chinese (Simplified)';
			$QuicktimeLanguageLookup[34]    = 'Flemish';
			$QuicktimeLanguageLookup[35]    = 'Irish';
			$QuicktimeLanguageLookup[36]    = 'Albanian';
			$QuicktimeLanguageLookup[37]    = 'Romanian';
			$QuicktimeLanguageLookup[38]    = 'Czech';
			$QuicktimeLanguageLookup[39]    = 'Slovak';
			$QuicktimeLanguageLookup[40]    = 'Slovenian';
			$QuicktimeLanguageLookup[41]    = 'Yiddish';
			$QuicktimeLanguageLookup[42]    = 'Serbian';
			$QuicktimeLanguageLookup[43]    = 'Macedonian';
			$QuicktimeLanguageLookup[44]    = 'Bulgarian';
			$QuicktimeLanguageLookup[45]    = 'Ukrainian';
			$QuicktimeLanguageLookup[46]    = 'Byelorussian';
			$QuicktimeLanguageLookup[47]    = 'Uzbek';
			$QuicktimeLanguageLookup[48]    = 'Kazakh';
			$QuicktimeLanguageLookup[49]    = 'Azerbaijani';
			$QuicktimeLanguageLookup[50]    = 'AzerbaijanAr';
			$QuicktimeLanguageLookup[51]    = 'Armenian';
			$QuicktimeLanguageLookup[52]    = 'Georgian';
			$QuicktimeLanguageLookup[53]    = 'Moldavian';
			$QuicktimeLanguageLookup[54]    = 'Kirghiz';
			$QuicktimeLanguageLookup[55]    = 'Tajiki';
			$QuicktimeLanguageLookup[56]    = 'Turkmen';
			$QuicktimeLanguageLookup[57]    = 'Mongolian';
			$QuicktimeLanguageLookup[58]    = 'MongolianCyr';
			$QuicktimeLanguageLookup[59]    = 'Pashto';
			$QuicktimeLanguageLookup[60]    = 'Kurdish';
			$QuicktimeLanguageLookup[61]    = 'Kashmiri';
			$QuicktimeLanguageLookup[62]    = 'Sindhi';
			$QuicktimeLanguageLookup[63]    = 'Tibetan';
			$QuicktimeLanguageLookup[64]    = 'Nepali';
			$QuicktimeLanguageLookup[65]    = 'Sanskrit';
			$QuicktimeLanguageLookup[66]    = 'Marathi';
			$QuicktimeLanguageLookup[67]    = 'Bengali';
			$QuicktimeLanguageLookup[68]    = 'Assamese';
			$QuicktimeLanguageLookup[69]    = 'Gujarati';
			$QuicktimeLanguageLookup[70]    = 'Punjabi';
			$QuicktimeLanguageLookup[71]    = 'Oriya';
			$QuicktimeLanguageLookup[72]    = 'Malayalam';
			$QuicktimeLanguageLookup[73]    = 'Kannada';
			$QuicktimeLanguageLookup[74]    = 'Tamil';
			$QuicktimeLanguageLookup[75]    = 'Telugu';
			$QuicktimeLanguageLookup[76]    = 'Sinhalese';
			$QuicktimeLanguageLookup[77]    = 'Burmese';
			$QuicktimeLanguageLookup[78]    = 'Khmer';
			$QuicktimeLanguageLookup[79]    = 'Lao';
			$QuicktimeLanguageLookup[80]    = 'Vietnamese';
			$QuicktimeLanguageLookup[81]    = 'Indonesian';
			$QuicktimeLanguageLookup[82]    = 'Tagalog';
			$QuicktimeLanguageLookup[83]    = 'MalayRoman';
			$QuicktimeLanguageLookup[84]    = 'MalayArabic';
			$QuicktimeLanguageLookup[85]    = 'Amharic';
			$QuicktimeLanguageLookup[86]    = 'Tigrinya';
			$QuicktimeLanguageLookup[87]    = 'Galla';
			$QuicktimeLanguageLookup[87]    = 'Oromo';
			$QuicktimeLanguageLookup[88]    = 'Somali';
			$QuicktimeLanguageLookup[89]    = 'Swahili';
			$QuicktimeLanguageLookup[90]    = 'Ruanda';
			$QuicktimeLanguageLookup[91]    = 'Rundi';
			$QuicktimeLanguageLookup[92]    = 'Chewa';
			$QuicktimeLanguageLookup[93]    = 'Malagasy';
			$QuicktimeLanguageLookup[94]    = 'Esperanto';
			$QuicktimeLanguageLookup[128]   = 'Welsh';
			$QuicktimeLanguageLookup[129]   = 'Basque';
			$QuicktimeLanguageLookup[130]   = 'Catalan';
			$QuicktimeLanguageLookup[131]   = 'Latin';
			$QuicktimeLanguageLookup[132]   = 'Quechua';
			$QuicktimeLanguageLookup[133]   = 'Guarani';
			$QuicktimeLanguageLookup[134]   = 'Aymara';
			$QuicktimeLanguageLookup[135]   = 'Tatar';
			$QuicktimeLanguageLookup[136]   = 'Uighur';
			$QuicktimeLanguageLookup[137]   = 'Dzongkha';
			$QuicktimeLanguageLookup[138]   = 'JavaneseRom';
			$QuicktimeLanguageLookup[32767] = 'Unspecified';
		}
		if (($languageid > 138) && ($languageid < 32767)) {
			/*
			ISO Language Codes - http://www.loc.gov/standards/iso639-2/php/code_list.php
			Because the language codes specified by ISO 639-2/T are three characters long, they must be packed to fit into a 16-bit field.
			The packing algorithm must map each of the three characters, which are always lowercase, into a 5-bit integer and then concatenate
			these integers into the least significant 15 bits of a 16-bit integer, leaving the 16-bit integer's most significant bit set to zero.

One algorithm for performing this packing is to treat each ISO character as a 16-bit integer. Subtract 0x60 from the first character
			and multiply by 2^10 (0x400), subtract 0x60 from the second character and multiply by 2^5 (0x20), subtract 0x60 from the third character,
			and add the three 16-bit values. This will result in a single 16-bit value with the three codes correctly packed into the 15 least
			significant bits and the most significant bit set to zero.
			*/
			$iso_language_id  = '';
			$iso_language_id .= chr((($languageid & 0x7C00) >> 10) + 0x60);
			$iso_language_id .= chr((($languageid & 0x03E0) >>  5) + 0x60);
			$iso_language_id .= chr((($languageid & 0x001F) >>  0) + 0x60);
			$QuicktimeLanguageLookup[$languageid] = getid3_id3v2::LanguageLookup($iso_language_id);
		}
		return (isset($QuicktimeLanguageLookup[$languageid]) ? $QuicktimeLanguageLookup[$languageid] : 'invalid');
	}

/**
	 * @param string $codecid
	 *
	 * @return string
	 */
	public function QuicktimeVideoCodecLookup($codecid) {
		static $QuicktimeVideoCodecLookup = array();
		if (empty($QuicktimeVideoCodecLookup)) {
			$QuicktimeVideoCodecLookup['.SGI'] = 'SGI';
			$QuicktimeVideoCodecLookup['3IV1'] = '3ivx MPEG-4 v1';
			$QuicktimeVideoCodecLookup['3IV2'] = '3ivx MPEG-4 v2';
			$QuicktimeVideoCodecLookup['3IVX'] = '3ivx MPEG-4';
			$QuicktimeVideoCodecLookup['8BPS'] = 'Planar RGB';
			$QuicktimeVideoCodecLookup['avc1'] = 'H.264/MPEG-4 AVC';
			$QuicktimeVideoCodecLookup['avr '] = 'AVR-JPEG';
			$QuicktimeVideoCodecLookup['b16g'] = '16Gray';
			$QuicktimeVideoCodecLookup['b32a'] = '32AlphaGray';
			$QuicktimeVideoCodecLookup['b48r'] = '48RGB';
			$QuicktimeVideoCodecLookup['b64a'] = '64ARGB';
			$QuicktimeVideoCodecLookup['base'] = 'Base';
			$QuicktimeVideoCodecLookup['clou'] = 'Cloud';
			$QuicktimeVideoCodecLookup['cmyk'] = 'CMYK';
			$QuicktimeVideoCodecLookup['cvid'] = 'Cinepak';
			$QuicktimeVideoCodecLookup['dmb1'] = 'OpenDML JPEG';
			$QuicktimeVideoCodecLookup['dvc '] = 'DVC-NTSC';
			$QuicktimeVideoCodecLookup['dvcp'] = 'DVC-PAL';
			$QuicktimeVideoCodecLookup['dvpn'] = 'DVCPro-NTSC';
			$QuicktimeVideoCodecLookup['dvpp'] = 'DVCPro-PAL';
			$QuicktimeVideoCodecLookup['fire'] = 'Fire';
			$QuicktimeVideoCodecLookup['flic'] = 'FLC';
			$QuicktimeVideoCodecLookup['gif '] = 'GIF';
			$QuicktimeVideoCodecLookup['h261'] = 'H261';
			$QuicktimeVideoCodecLookup['h263'] = 'H263';
			$QuicktimeVideoCodecLookup['hvc1'] = 'H.265/HEVC';
			$QuicktimeVideoCodecLookup['IV41'] = 'Indeo4';
			$QuicktimeVideoCodecLookup['jpeg'] = 'JPEG';
			$QuicktimeVideoCodecLookup['kpcd'] = 'PhotoCD';
			$QuicktimeVideoCodecLookup['mjpa'] = 'Motion JPEG-A';
			$QuicktimeVideoCodecLookup['mjpb'] = 'Motion JPEG-B';
			$QuicktimeVideoCodecLookup['msvc'] = 'Microsoft Video1';
			$QuicktimeVideoCodecLookup['myuv'] = 'MPEG YUV420';
			$QuicktimeVideoCodecLookup['path'] = 'Vector';
			$QuicktimeVideoCodecLookup['png '] = 'PNG';
			$QuicktimeVideoCodecLookup['PNTG'] = 'MacPaint';
			$QuicktimeVideoCodecLookup['qdgx'] = 'QuickDrawGX';
			$QuicktimeVideoCodecLookup['qdrw'] = 'QuickDraw';
			$QuicktimeVideoCodecLookup['raw '] = 'RAW';
			$QuicktimeVideoCodecLookup['ripl'] = 'WaterRipple';
			$QuicktimeVideoCodecLookup['rpza'] = 'Video';
			$QuicktimeVideoCodecLookup['smc '] = 'Graphics';
			$QuicktimeVideoCodecLookup['SVQ1'] = 'Sorenson Video 1';
			$QuicktimeVideoCodecLookup['SVQ1'] = 'Sorenson Video 3';
			$QuicktimeVideoCodecLookup['syv9'] = 'Sorenson YUV9';
			$QuicktimeVideoCodecLookup['tga '] = 'Targa';
			$QuicktimeVideoCodecLookup['tiff'] = 'TIFF';
			$QuicktimeVideoCodecLookup['WRAW'] = 'Windows RAW';
			$QuicktimeVideoCodecLookup['WRLE'] = 'BMP';
			$QuicktimeVideoCodecLookup['y420'] = 'YUV420';
			$QuicktimeVideoCodecLookup['yuv2'] = 'ComponentVideo';
			$QuicktimeVideoCodecLookup['yuvs'] = 'ComponentVideoUnsigned';
			$QuicktimeVideoCodecLookup['yuvu'] = 'ComponentVideoSigned';
		}
		return (isset($QuicktimeVideoCodecLookup[$codecid]) ? $QuicktimeVideoCodecLookup[$codecid] : '');
	}

/**
	 * @param string $codecid
	 *
	 * @return mixed|string
	 */
	public function QuicktimeAudioCodecLookup($codecid) {
		static $QuicktimeAudioCodecLookup = array();
		if (empty($QuicktimeAudioCodecLookup)) {
			$QuicktimeAudioCodecLookup['.mp3']          = 'Fraunhofer MPEG Layer-III alias';
			$QuicktimeAudioCodecLookup['aac ']          = 'ISO/IEC 14496-3 AAC';
			$QuicktimeAudioCodecLookup['agsm']          = 'Apple GSM 10:1';
			$QuicktimeAudioCodecLookup['alac']          = 'Apple Lossless Audio Codec';
			$QuicktimeAudioCodecLookup['alaw']          = 'A-law 2:1';
			$QuicktimeAudioCodecLookup['conv']          = 'Sample Format';
			$QuicktimeAudioCodecLookup['dvca']          = 'DV';
			$QuicktimeAudioCodecLookup['dvi ']          = 'DV 4:1';
			$QuicktimeAudioCodecLookup['eqal']          = 'Frequency Equalizer';
			$QuicktimeAudioCodecLookup['fl32']          = '32-bit Floating Point';
			$QuicktimeAudioCodecLookup['fl64']          = '64-bit Floating Point';
			$QuicktimeAudioCodecLookup['ima4']          = 'Interactive Multimedia Association 4:1';
			$QuicktimeAudioCodecLookup['in24']          = '24-bit Integer';
			$QuicktimeAudioCodecLookup['in32']          = '32-bit Integer';
			$QuicktimeAudioCodecLookup['lpc ']          = 'LPC 23:1';
			$QuicktimeAudioCodecLookup['MAC3']          = 'Macintosh Audio Compression/Expansion (MACE) 3:1';
			$QuicktimeAudioCodecLookup['MAC6']          = 'Macintosh Audio Compression/Expansion (MACE) 6:1';
			$QuicktimeAudioCodecLookup['mixb']          = '8-bit Mixer';
			$QuicktimeAudioCodecLookup['mixw']          = '16-bit Mixer';
			$QuicktimeAudioCodecLookup['mp4a']          = 'ISO/IEC 14496-3 AAC';
			$QuicktimeAudioCodecLookup['MS'."\x00\x02"] = 'Microsoft ADPCM';
			$QuicktimeAudioCodecLookup['MS'."\x00\x11"] = 'DV IMA';
			$QuicktimeAudioCodecLookup['MS'."\x00\x55"] = 'Fraunhofer MPEG Layer III';
			$QuicktimeAudioCodecLookup['NONE']          = 'No Encoding';
			$QuicktimeAudioCodecLookup['Qclp']          = 'Qualcomm PureVoice';
			$QuicktimeAudioCodecLookup['QDM2']          = 'QDesign Music 2';
			$QuicktimeAudioCodecLookup['QDMC']          = 'QDesign Music 1';
			$QuicktimeAudioCodecLookup['ratb']          = '8-bit Rate';
			$QuicktimeAudioCodecLookup['ratw']          = '16-bit Rate';
			$QuicktimeAudioCodecLookup['raw ']          = 'raw PCM';
			$QuicktimeAudioCodecLookup['sour']          = 'Sound Source';
			$QuicktimeAudioCodecLookup['sowt']          = 'signed/two\'s complement (Little Endian)';
			$QuicktimeAudioCodecLookup['str1']          = 'Iomega MPEG layer II';
			$QuicktimeAudioCodecLookup['str2']          = 'Iomega MPEG *layer II';
			$QuicktimeAudioCodecLookup['str3']          = 'Iomega MPEG **layer II';
			$QuicktimeAudioCodecLookup['str4']          = 'Iomega MPEG ***layer II';
			$QuicktimeAudioCodecLookup['twos']          = 'signed/two\'s complement (Big Endian)';
			$QuicktimeAudioCodecLookup['ulaw']          = 'mu-law 2:1';
		}
		return (isset($QuicktimeAudioCodecLookup[$codecid]) ? $QuicktimeAudioCodecLookup[$codecid] : '');
	}

/**
	 * @param string $compressionid
	 *
	 * @return string
	 */
	public function QuicktimeDCOMLookup($compressionid) {
		static $QuicktimeDCOMLookup = array();
		if (empty($QuicktimeDCOMLookup)) {
			$QuicktimeDCOMLookup['zlib'] = 'ZLib Deflate';
			$QuicktimeDCOMLookup['adec'] = 'Apple Compression';
		}
		return (isset($QuicktimeDCOMLookup[$compressionid]) ? $QuicktimeDCOMLookup[$compressionid] : '');
	}

/**
	 * @param int $colordepthid
	 *
	 * @return string
	 */
	public function QuicktimeColorNameLookup($colordepthid) {
		static $QuicktimeColorNameLookup = array();
		if (empty($QuicktimeColorNameLookup)) {
			$QuicktimeColorNameLookup[1]  = '2-color (monochrome)';
			$QuicktimeColorNameLookup[2]  = '4-color';
			$QuicktimeColorNameLookup[4]  = '16-color';
			$QuicktimeColorNameLookup[8]  = '256-color';
			$QuicktimeColorNameLookup[16] = 'thousands (16-bit color)';
			$QuicktimeColorNameLookup[24] = 'millions (24-bit color)';
			$QuicktimeColorNameLookup[32] = 'millions+ (32-bit color)';
			$QuicktimeColorNameLookup[33] = 'black & white';
			$QuicktimeColorNameLookup[34] = '4-gray';
			$QuicktimeColorNameLookup[36] = '16-gray';
			$QuicktimeColorNameLookup[40] = '256-gray';
		}
		return (isset($QuicktimeColorNameLookup[$colordepthid]) ? $QuicktimeColorNameLookup[$colordepthid] : 'invalid');
	}

/**
	 * @param int $stik
	 *
	 * @return string
	 */
	public function QuicktimeSTIKLookup($stik) {
		static $QuicktimeSTIKLookup = array();
		if (empty($QuicktimeSTIKLookup)) {
			$QuicktimeSTIKLookup[0]  = 'Movie';
			$QuicktimeSTIKLookup[1]  = 'Normal';
			$QuicktimeSTIKLookup[2]  = 'Audiobook';
			$QuicktimeSTIKLookup[5]  = 'Whacked Bookmark';
			$QuicktimeSTIKLookup[6]  = 'Music Video';
			$QuicktimeSTIKLookup[9]  = 'Short Film';
			$QuicktimeSTIKLookup[10] = 'TV Show';
			$QuicktimeSTIKLookup[11] = 'Booklet';
			$QuicktimeSTIKLookup[14] = 'Ringtone';
			$QuicktimeSTIKLookup[21] = 'Podcast';
		}
		return (isset($QuicktimeSTIKLookup[$stik]) ? $QuicktimeSTIKLookup[$stik] : 'invalid');
	}

/**
	 * @param int $audio_profile_id
	 *
	 * @return string
	 */
	public function QuicktimeIODSaudioProfileName($audio_profile_id) {
		static $QuicktimeIODSaudioProfileNameLookup = array();
		if (empty($QuicktimeIODSaudioProfileNameLookup)) {
			$QuicktimeIODSaudioProfileNameLookup = array(
				0x00 => 'ISO Reserved (0x00)',
				0x01 => 'Main Audio Profile @ Level 1',
				0x02 => 'Main Audio Profile @ Level 2',
				0x03 => 'Main Audio Profile @ Level 3',
				0x04 => 'Main Audio Profile @ Level 4',
				0x05 => 'Scalable Audio Profile @ Level 1',
				0x06 => 'Scalable Audio Profile @ Level 2',
				0x07 => 'Scalable Audio Profile @ Level 3',
				0x08 => 'Scalable Audio Profile @ Level 4',
				0x09 => 'Speech Audio Profile @ Level 1',
				0x0A => 'Speech Audio Profile @ Level 2',
				0x0B => 'Synthetic Audio Profile @ Level 1',
				0x0C => 'Synthetic Audio Profile @ Level 2',
				0x0D => 'Synthetic Audio Profile @ Level 3',
				0x0E => 'High Quality Audio Profile @ Level 1',
				0x0F => 'High Quality Audio Profile @ Level 2',
				0x10 => 'High Quality Audio Profile @ Level 3',
				0x11 => 'High Quality Audio Profile @ Level 4',
				0x12 => 'High Quality Audio Profile @ Level 5',
				0x13 => 'High Quality Audio Profile @ Level 6',
				0x14 => 'High Quality Audio Profile @ Level 7',
				0x15 => 'High Quality Audio Profile @ Level 8',
				0x16 => 'Low Delay Audio Profile @ Level 1',
				0x17 => 'Low Delay Audio Profile @ Level 2',
				0x18 => 'Low Delay Audio Profile @ Level 3',
				0x19 => 'Low Delay Audio Profile @ Level 4',
				0x1A => 'Low Delay Audio Profile @ Level 5',
				0x1B => 'Low Delay Audio Profile @ Level 6',
				0x1C => 'Low Delay Audio Profile @ Level 7',
				0x1D => 'Low Delay Audio Profile @ Level 8',
				0x1E => 'Natural Audio Profile @ Level 1',
				0x1F => 'Natural Audio Profile @ Level 2',
				0x20 => 'Natural Audio Profile @ Level 3',
				0x21 => 'Natural Audio Profile @ Level 4',
				0x22 => 'Mobile Audio Internetworking Profile @ Level 1',
				0x23 => 'Mobile Audio Internetworking Profile @ Level 2',
				0x24 => 'Mobile Audio Internetworking Profile @ Level 3',
				0x25 => 'Mobile Audio Internetworking Profile @ Level 4',
				0x26 => 'Mobile Audio Internetworking Profile @ Level 5',
				0x27 => 'Mobile Audio Internetworking Profile @ Level 6',
				0x28 => 'AAC Profile @ Level 1',
				0x29 => 'AAC Profile @ Level 2',
				0x2A => 'AAC Profile @ Level 4',
				0x2B => 'AAC Profile @ Level 5',
				0x2C => 'High Efficiency AAC Profile @ Level 2',
				0x2D => 'High Efficiency AAC Profile @ Level 3',
				0x2E => 'High Efficiency AAC Profile @ Level 4',
				0x2F => 'High Efficiency AAC Profile @ Level 5',
				0xFE => 'Not part of MPEG-4 audio profiles',
				0xFF => 'No audio capability required',
			);
		}
		return (isset($QuicktimeIODSaudioProfileNameLookup[$audio_profile_id]) ? $QuicktimeIODSaudioProfileNameLookup[$audio_profile_id] : 'ISO Reserved / User Private');
	}

/**
	 * @param int $video_profile_id
	 *
	 * @return string
	 */
	public function QuicktimeIODSvideoProfileName($video_profile_id) {
		static $QuicktimeIODSvideoProfileNameLookup = array();
		if (empty($QuicktimeIODSvideoProfileNameLookup)) {
			$QuicktimeIODSvideoProfileNameLookup = array(
				0x00 => 'Reserved (0x00) Profile',
				0x01 => 'Simple Profile @ Level 1',
				0x02 => 'Simple Profile @ Level 2',
				0x03 => 'Simple Profile @ Level 3',
				0x08 => 'Simple Profile @ Level 0',
				0x10 => 'Simple Scalable Profile @ Level 0',
				0x11 => 'Simple Scalable Profile @ Level 1',
				0x12 => 'Simple Scalable Profile @ Level 2',
				0x15 => 'AVC/H264 Profile',
				0x21 => 'Core Profile @ Level 1',
				0x22 => 'Core Profile @ Level 2',
				0x32 => 'Main Profile @ Level 2',
				0x33 => 'Main Profile @ Level 3',
				0x34 => 'Main Profile @ Level 4',
				0x42 => 'N-bit Profile @ Level 2',
				0x51 => 'Scalable Texture Profile @ Level 1',
				0x61 => 'Simple Face Animation Profile @ Level 1',
				0x62 => 'Simple Face Animation Profile @ Level 2',
				0x63 => 'Simple FBA Profile @ Level 1',
				0x64 => 'Simple FBA Profile @ Level 2',
				0x71 => 'Basic Animated Texture Profile @ Level 1',
				0x72 => 'Basic Animated Texture Profile @ Level 2',
				0x81 => 'Hybrid Profile @ Level 1',
				0x82 => 'Hybrid Profile @ Level 2',
				0x91 => 'Advanced Real Time Simple Profile @ Level 1',
				0x92 => 'Advanced Real Time Simple Profile @ Level 2',
				0x93 => 'Advanced Real Time Simple Profile @ Level 3',
				0x94 => 'Advanced Real Time Simple Profile @ Level 4',
				0xA1 => 'Core Scalable Profile @ Level1',
				0xA2 => 'Core Scalable Profile @ Level2',
				0xA3 => 'Core Scalable Profile @ Level3',
				0xB1 => 'Advanced Coding Efficiency Profile @ Level 1',
				0xB2 => 'Advanced Coding Efficiency Profile @ Level 2',
				0xB3 => 'Advanced Coding Efficiency Profile @ Level 3',
				0xB4 => 'Advanced Coding Efficiency Profile @ Level 4',
				0xC1 => 'Advanced Core Profile @ Level 1',
				0xC2 => 'Advanced Core Profile @ Level 2',
				0xD1 => 'Advanced Scalable Texture @ Level1',
				0xD2 => 'Advanced Scalable Texture @ Level2',
				0xE1 => 'Simple Studio Profile @ Level 1',
				0xE2 => 'Simple Studio Profile @ Level 2',
				0xE3 => 'Simple Studio Profile @ Level 3',
				0xE4 => 'Simple Studio Profile @ Level 4',
				0xE5 => 'Core Studio Profile @ Level 1',
				0xE6 => 'Core Studio Profile @ Level 2',
				0xE7 => 'Core Studio Profile @ Level 3',
				0xE8 => 'Core Studio Profile @ Level 4',
				0xF0 => 'Advanced Simple Profile @ Level 0',
				0xF1 => 'Advanced Simple Profile @ Level 1',
				0xF2 => 'Advanced Simple Profile @ Level 2',
				0xF3 => 'Advanced Simple Profile @ Level 3',
				0xF4 => 'Advanced Simple Profile @ Level 4',
				0xF5 => 'Advanced Simple Profile @ Level 5',
				0xF7 => 'Advanced Simple Profile @ Level 3b',
				0xF8 => 'Fine Granularity Scalable Profile @ Level 0',
				0xF9 => 'Fine Granularity Scalable Profile @ Level 1',
				0xFA => 'Fine Granularity Scalable Profile @ Level 2',
				0xFB => 'Fine Granularity Scalable Profile @ Level 3',
				0xFC => 'Fine Granularity Scalable Profile @ Level 4',
				0xFD => 'Fine Granularity Scalable Profile @ Level 5',
				0xFE => 'Not part of MPEG-4 Visual profiles',
				0xFF => 'No visual capability required',
			);
		}
		return (isset($QuicktimeIODSvideoProfileNameLookup[$video_profile_id]) ? $QuicktimeIODSvideoProfileNameLookup[$video_profile_id] : 'ISO Reserved Profile');
	}

/**
	 * @param int $rtng
	 *
	 * @return string
	 */
	public function QuicktimeContentRatingLookup($rtng) {
		static $QuicktimeContentRatingLookup = array();
		if (empty($QuicktimeContentRatingLookup)) {
			$QuicktimeContentRatingLookup[0]  = 'None';
			$QuicktimeContentRatingLookup[1]  = 'Explicit';
			$QuicktimeContentRatingLookup[2]  = 'Clean';
			$QuicktimeContentRatingLookup[4]  = 'Explicit (old)';
		}
		return (isset($QuicktimeContentRatingLookup[$rtng]) ? $QuicktimeContentRatingLookup[$rtng] : 'invalid');
	}

/**
	 * @param int $akid
	 *
	 * @return string
	 */
	public function QuicktimeStoreAccountTypeLookup($akid) {
		static $QuicktimeStoreAccountTypeLookup = array();
		if (empty($QuicktimeStoreAccountTypeLookup)) {
			$QuicktimeStoreAccountTypeLookup[0] = 'iTunes';
			$QuicktimeStoreAccountTypeLookup[1] = 'AOL';
		}
		return (isset($QuicktimeStoreAccountTypeLookup[$akid]) ? $QuicktimeStoreAccountTypeLookup[$akid] : 'invalid');
	}

/**
	 * @param int $sfid
	 *
	 * @return string
	 */
	public function QuicktimeStoreFrontCodeLookup($sfid) {
		static $QuicktimeStoreFrontCodeLookup = array();
		if (empty($QuicktimeStoreFrontCodeLookup)) {
			$QuicktimeStoreFrontCodeLookup[143460] = 'Australia';
			$QuicktimeStoreFrontCodeLookup[143445] = 'Austria';
			$QuicktimeStoreFrontCodeLookup[143446] = 'Belgium';
			$QuicktimeStoreFrontCodeLookup[143455] = 'Canada';
			$QuicktimeStoreFrontCodeLookup[143458] = 'Denmark';
			$QuicktimeStoreFrontCodeLookup[143447] = 'Finland';
			$QuicktimeStoreFrontCodeLookup[143442] = 'France';
			$QuicktimeStoreFrontCodeLookup[143443] = 'Germany';
			$QuicktimeStoreFrontCodeLookup[143448] = 'Greece';
			$QuicktimeStoreFrontCodeLookup[143449] = 'Ireland';
			$QuicktimeStoreFrontCodeLookup[143450] = 'Italy';
			$QuicktimeStoreFrontCodeLookup[143462] = 'Japan';
			$QuicktimeStoreFrontCodeLookup[143451] = 'Luxembourg';
			$QuicktimeStoreFrontCodeLookup[143452] = 'Netherlands';
			$QuicktimeStoreFrontCodeLookup[143461] = 'New Zealand';
			$QuicktimeStoreFrontCodeLookup[143457] = 'Norway';
			$QuicktimeStoreFrontCodeLookup[143453] = 'Portugal';
			$QuicktimeStoreFrontCodeLookup[143454] = 'Spain';
			$QuicktimeStoreFrontCodeLookup[143456] = 'Sweden';
			$QuicktimeStoreFrontCodeLookup[143459] = 'Switzerland';
			$QuicktimeStoreFrontCodeLookup[143444] = 'United Kingdom';
			$QuicktimeStoreFrontCodeLookup[143441] = 'United States';
		}
		return (isset($QuicktimeStoreFrontCodeLookup[$sfid]) ? $QuicktimeStoreFrontCodeLookup[$sfid] : 'invalid');
	}

/**
	 * @param string $keyname
	 * @param string|array $data
	 * @param string $boxname
	 *
	 * @return bool
	 */
	public function CopyToAppropriateCommentsSection($keyname, $data, $boxname='') {
		static $handyatomtranslatorarray = array();
		if (empty($handyatomtranslatorarray)) {
			// http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
			// http://www.geocities.com/xhelmboyx/quicktime/formats/mp4-layout.txt
			// http://atomicparsley.sourceforge.net/mpeg-4files.html
			// https://code.google.com/p/mp4v2/wiki/iTunesMetadata
			$handyatomtranslatorarray["\xA9".'alb'] = 'album';               // iTunes 4.0
			$handyatomtranslatorarray["\xA9".'ART'] = 'artist';
			$handyatomtranslatorarray["\xA9".'art'] = 'artist';              // iTunes 4.0
			$handyatomtranslatorarray["\xA9".'aut'] = 'author';
			$handyatomtranslatorarray["\xA9".'cmt'] = 'comment';             // iTunes 4.0
			$handyatomtranslatorarray["\xA9".'com'] = 'comment';
			$handyatomtranslatorarray["\xA9".'cpy'] = 'copyright';
			$handyatomtranslatorarray["\xA9".'day'] = 'creation_date';       // iTunes 4.0
			$handyatomtranslatorarray["\xA9".'dir'] = 'director';
			$handyatomtranslatorarray["\xA9".'ed1'] = 'edit1';
			$handyatomtranslatorarray["\xA9".'ed2'] = 'edit2';
			$handyatomtranslatorarray["\xA9".'ed3'] = 'edit3';
			$handyatomtranslatorarray["\xA9".'ed4'] = 'edit4';
			$handyatomtranslatorarray["\xA9".'ed5'] = 'edit5';
			$handyatomtranslatorarray["\xA9".'ed6'] = 'edit6';
			$handyatomtranslatorarray["\xA9".'ed7'] = 'edit7';
			$handyatomtranslatorarray["\xA9".'ed8'] = 'edit8';
			$handyatomtranslatorarray["\xA9".'ed9'] = 'edit9';
			$handyatomtranslatorarray["\xA9".'enc'] = 'encoded_by';
			$handyatomtranslatorarray["\xA9".'fmt'] = 'format';
			$handyatomtranslatorarray["\xA9".'gen'] = 'genre';               // iTunes 4.0
			$handyatomtranslatorarray["\xA9".'grp'] = 'grouping';            // iTunes 4.2
			$handyatomtranslatorarray["\xA9".'hst'] = 'host_computer';
			$handyatomtranslatorarray["\xA9".'inf'] = 'information';
			$handyatomtranslatorarray["\xA9".'lyr'] = 'lyrics';              // iTunes 5.0
			$handyatomtranslatorarray["\xA9".'mak'] = 'make';
			$handyatomtranslatorarray["\xA9".'mod'] = 'model';
			$handyatomtranslatorarray["\xA9".'nam'] = 'title';               // iTunes 4.0
			$handyatomtranslatorarray["\xA9".'ope'] = 'composer';
			$handyatomtranslatorarray["\xA9".'prd'] = 'producer';
			$handyatomtranslatorarray["\xA9".'PRD'] = 'product';
			$handyatomtranslatorarray["\xA9".'prf'] = 'performers';
			$handyatomtranslatorarray["\xA9".'req'] = 'system_requirements';
			$handyatomtranslatorarray["\xA9".'src'] = 'source_credit';
			$handyatomtranslatorarray["\xA9".'swr'] = 'software';
			$handyatomtranslatorarray["\xA9".'too'] = 'encoding_tool';       // iTunes 4.0
			$handyatomtranslatorarray["\xA9".'trk'] = 'track_number';
			$handyatomtranslatorarray["\xA9".'url'] = 'url';
			$handyatomtranslatorarray["\xA9".'wrn'] = 'warning';
			$handyatomtranslatorarray["\xA9".'wrt'] = 'composer';
			$handyatomtranslatorarray['aART'] = 'album_artist';
			$handyatomtranslatorarray['apID'] = 'purchase_account';
			$handyatomtranslatorarray['catg'] = 'category';            // iTunes 4.9
			$handyatomtranslatorarray['covr'] = 'picture';             // iTunes 4.0
			$handyatomtranslatorarray['cpil'] = 'compilation';         // iTunes 4.0
			$handyatomtranslatorarray['cprt'] = 'copyright';           // iTunes 4.0?
			$handyatomtranslatorarray['desc'] = 'description';         // iTunes 5.0
			$handyatomtranslatorarray['disk'] = 'disc_number';         // iTunes 4.0
			$handyatomtranslatorarray['egid'] = 'episode_guid';        // iTunes 4.9
			$handyatomtranslatorarray['gnre'] = 'genre';               // iTunes 4.0
			$handyatomtranslatorarray['hdvd'] = 'hd_video';            // iTunes 4.0
			$handyatomtranslatorarray['ldes'] = 'description_long';    //
			$handyatomtranslatorarray['keyw'] = 'keyword';             // iTunes 4.9
			$handyatomtranslatorarray['pcst'] = 'podcast';             // iTunes 4.9
			$handyatomtranslatorarray['pgap'] = 'gapless_playback';    // iTunes 7.0
			$handyatomtranslatorarray['purd'] = 'purchase_date';       // iTunes 6.0.2
			$handyatomtranslatorarray['purl'] = 'podcast_url';         // iTunes 4.9
			$handyatomtranslatorarray['rtng'] = 'rating';              // iTunes 4.0
			$handyatomtranslatorarray['soaa'] = 'sort_album_artist';   //
			$handyatomtranslatorarray['soal'] = 'sort_album';          //
			$handyatomtranslatorarray['soar'] = 'sort_artist';         //
			$handyatomtranslatorarray['soco'] = 'sort_composer';       //
			$handyatomtranslatorarray['sonm'] = 'sort_title';          //
			$handyatomtranslatorarray['sosn'] = 'sort_show';           //
			$handyatomtranslatorarray['stik'] = 'stik';                // iTunes 4.9
			$handyatomtranslatorarray['tmpo'] = 'bpm';                 // iTunes 4.0
			$handyatomtranslatorarray['trkn'] = 'track_number';        // iTunes 4.0
			$handyatomtranslatorarray['tven'] = 'tv_episode_id';       //
			$handyatomtranslatorarray['tves'] = 'tv_episode';          // iTunes 6.0
			$handyatomtranslatorarray['tvnn'] = 'tv_network_name';     // iTunes 6.0
			$handyatomtranslatorarray['tvsh'] = 'tv_show_name';        // iTunes 6.0
			$handyatomtranslatorarray['tvsn'] = 'tv_season';           // iTunes 6.0

// boxnames:
			/*
			$handyatomtranslatorarray['iTunSMPB']                    = 'iTunSMPB';
			$handyatomtranslatorarray['iTunNORM']                    = 'iTunNORM';
			$handyatomtranslatorarray['Encoding Params']             = 'Encoding Params';
			$handyatomtranslatorarray['replaygain_track_gain']       = 'replaygain_track_gain';
			$handyatomtranslatorarray['replaygain_track_peak']       = 'replaygain_track_peak';
			$handyatomtranslatorarray['replaygain_track_minmax']     = 'replaygain_track_minmax';
			$handyatomtranslatorarray['MusicIP PUID']                = 'MusicIP PUID';
			$handyatomtranslatorarray['MusicBrainz Artist Id']       = 'MusicBrainz Artist Id';
			$handyatomtranslatorarray['MusicBrainz Album Id']        = 'MusicBrainz Album Id';
			$handyatomtranslatorarray['MusicBrainz Album Artist Id'] = 'MusicBrainz Album Artist Id';
			$handyatomtranslatorarray['MusicBrainz Track Id']        = 'MusicBrainz Track Id';
			$handyatomtranslatorarray['MusicBrainz Disc Id']         = 'MusicBrainz Disc Id';

// http://age.hobba.nl/audio/tag_frame_reference.html
			$handyatomtranslatorarray['PLAY_COUNTER']                = 'play_counter'; // Foobar2000 - https://www.getid3.org/phpBB3/viewtopic.php?t=1355
			$handyatomtranslatorarray['MEDIATYPE']                   = 'mediatype';    // Foobar2000 - https://www.getid3.org/phpBB3/viewtopic.php?t=1355
			*/
		}
		$info = &$this->getid3->info;
		$comment_key = '';
		if ($boxname && ($boxname != $keyname)) {
			$comment_key = (isset($handyatomtranslatorarray[$boxname]) ? $handyatomtranslatorarray[$boxname] : $boxname);
		} elseif (isset($handyatomtranslatorarray[$keyname])) {
			$comment_key = $handyatomtranslatorarray[$keyname];
		}
		if ($comment_key) {
			if ($comment_key == 'picture') {
				// already copied directly into [comments][picture] elsewhere, do not re-copy here
				return true;
			}
			$gooddata = array($data);
			if ($comment_key == 'genre') {
				// some other taggers separate multiple genres with semicolon, e.g. "Heavy Metal;Thrash Metal;Metal"
				$gooddata = explode(';', $data);
			}
			foreach ($gooddata as $data) {
				if (!empty($info['quicktime']['comments'][$comment_key]) && in_array($data, $info['quicktime']['comments'][$comment_key], true)) {
					// avoid duplicate copies of identical data
					continue;
				}
				$info['quicktime']['comments'][$comment_key][] = $data;
			}
		}
		return true;
	}

/**
	 * @param string $lstring
	 * @param int    $count
	 *
	 * @return string
	 */
	public function LociString($lstring, &$count) {
		// Loci strings are UTF-8 or UTF-16 and null (x00/x0000) terminated. UTF-16 has a BOM
		// Also need to return the number of bytes the string occupied so additional fields can be extracted
		$len = strlen($lstring);
		if ($len == 0) {
			$count = 0;
			return '';
		}
		if ($lstring[0] == "\x00") {
			$count = 1;
			return '';
		}
		// check for BOM
		if (($len > 2) && ((($lstring[0] == "\xFE") && ($lstring[1] == "\xFF")) || (($lstring[0] == "\xFF") && ($lstring[1] == "\xFE")))) {
			// UTF-16
			if (preg_match('/(.*)\x00/', $lstring, $lmatches)) {
				$count = strlen($lmatches[1]) * 2 + 2; //account for 2 byte characters and trailing \x0000
				return getid3_lib::iconv_fallback_utf16_utf8($lmatches[1]);
			} else {
				return '';
			}
		}
		// UTF-8
		if (preg_match('/(.*)\x00/', $lstring, $lmatches)) {
			$count = strlen($lmatches[1]) + 1; //account for trailing \x00
			return $lmatches[1];
		}
		return '';
	}

/**
	 * @param string $nullterminatedstring
	 *
	 * @return string
	 */
	public function NoNullString($nullterminatedstring) {
		// remove the single null terminator on null terminated strings
		if (substr($nullterminatedstring, strlen($nullterminatedstring) - 1, 1) === "\x00") {
			return substr($nullterminatedstring, 0, strlen($nullterminatedstring) - 1);
		}
		return $nullterminatedstring;
	}

/**
	 * @param string $pascalstring
	 *
	 * @return string
	 */
	public function Pascal2String($pascalstring) {
		// Pascal strings have 1 unsigned byte at the beginning saying how many chars (1-255) are in the string
		return substr($pascalstring, 1);
	}

/**
	 * @param string $pascalstring
	 *
	 * @return string
	 */
	public function MaybePascal2String($pascalstring) {
		// Pascal strings have 1 unsigned byte at the beginning saying how many chars (1-255) are in the string
		// Check if string actually is in this format or written incorrectly, straight string, or null-terminated string
		if (ord(substr($pascalstring, 0, 1)) == (strlen($pascalstring) - 1)) {
			return substr($pascalstring, 1);
		} elseif (substr($pascalstring, -1, 1) == "\x00") {
			// appears to be null-terminated instead of Pascal-style
			return substr($pascalstring, 0, -1);
		}
		return $pascalstring;
	}

/**
	 * Helper functions for m4b audiobook chapters
	 * code by Steffen Hartmann 2015-Nov-08.
	 *
	 * @param array  $info
	 * @param string $tag
	 * @param string $history
	 * @param array  $result
	 */
	public function search_tag_by_key($info, $tag, $history, &$result) {
		foreach ($info as $key => $value) {
			$key_history = $history.'/'.$key;
			if ($key === $tag) {
				$result[] = array($key_history, $info);
			} else {
				if (is_array($value)) {
					$this->search_tag_by_key($value, $tag, $key_history, $result);
				}
			}
		}
	}

/**
	 * @param array  $info
	 * @param string $k
	 * @param string $v
	 * @param string $history
	 * @param array  $result
	 */
	public function search_tag_by_pair($info, $k, $v, $history, &$result) {
		foreach ($info as $key => $value) {
			$key_history = $history.'/'.$key;
			if (($key === $k) && ($value === $v)) {
				$result[] = array($key_history, $info);
			} else {
				if (is_array($value)) {
					$this->search_tag_by_pair($value, $k, $v, $key_history, $result);
				}
			}
		}
	}

/**
	 * @param array $info
	 *
	 * @return array
	 */
	public function quicktime_time_to_sample_table($info) {
		$res = array();
		$this->search_tag_by_pair($info['quicktime']['moov'], 'name', 'stbl', 'quicktime/moov', $res);
		foreach ($res as $value) {
			$stbl_res = array();
			$this->search_tag_by_pair($value[1], 'data_format', 'text', $value[0], $stbl_res);
			if (count($stbl_res) > 0) {
				$stts_res = array();
				$this->search_tag_by_key($value[1], 'time_to_sample_table', $value[0], $stts_res);
				if (count($stts_res) > 0) {
					return $stts_res[0][1]['time_to_sample_table'];
				}
			}
		}
		return array();
	}

/**
	 * @param array $info
	 *
	 * @return int
	 */
	public function quicktime_bookmark_time_scale($info) {
		$time_scale = '';
		$ts_prefix_len = 0;
		$res = array();
		$this->search_tag_by_pair($info['quicktime']['moov'], 'name', 'stbl', 'quicktime/moov', $res);
		foreach ($res as $value) {
			$stbl_res = array();
			$this->search_tag_by_pair($value[1], 'data_format', 'text', $value[0], $stbl_res);
			if (count($stbl_res) > 0) {
				$ts_res = array();
				$this->search_tag_by_key($info['quicktime']['moov'], 'time_scale', 'quicktime/moov', $ts_res);
				foreach ($ts_res as $sub_value) {
					$prefix = substr($sub_value[0], 0, -12);
					if ((substr($stbl_res[0][0], 0, strlen($prefix)) === $prefix) && ($ts_prefix_len < strlen($prefix))) {
						$time_scale = $sub_value[1]['time_scale'];
						$ts_prefix_len = strlen($prefix);
					}
				}
			}
		}
		return $time_scale;
	}
	/*
	// END helper functions for m4b audiobook chapters
	*/

}
�����������������������������������module.tag.apetag.php�������������������������������������������������������������������������������0000644�����������������00000045204�15150061000�0010545 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������<?php

/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org>               //
//  available at https://github.com/JamesHeinrich/getID3       //
//            or https://www.getid3.org                        //
//            or http://getid3.sourceforge.net                 //
//  see readme.txt for more details                            //
/////////////////////////////////////////////////////////////////
//                                                             //
// module.tag.apetag.php                                       //
// module for analyzing APE tags                               //
// dependencies: NONE                                          //
//                                                            ///
/////////////////////////////////////////////////////////////////

if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
	exit;
}

class getid3_apetag extends getid3_handler
{
	/**
	 * true: return full data for all attachments;
	 * false: return no data for all attachments;
	 * integer: return data for attachments <= than this;
	 * string: save as file to this directory.
	 *
	 * @var int|bool|string
	 */
	public $inline_attachments = true;

public $overrideendoffset  = 0;

/**
	 * @return bool
	 */
	public function Analyze() {
		$info = &$this->getid3->info;

if (!getid3_lib::intValueSupported($info['filesize'])) {
			$this->warning('Unable to check for APEtags because file is larger than '.round(PHP_INT_MAX / 1073741824).'GB');
			return false;
		}
		if (PHP_INT_MAX == 2147483647) {
			// https://github.com/JamesHeinrich/getID3/issues/439
			$this->warning('APEtag flags may not be parsed correctly on 32-bit PHP');
		}

$id3v1tagsize     = 128;
		$apetagheadersize = 32;
		$lyrics3tagsize   = 10;

if ($this->overrideendoffset == 0) {

$this->fseek(0 - $id3v1tagsize - $apetagheadersize - $lyrics3tagsize, SEEK_END);
			$APEfooterID3v1 = $this->fread($id3v1tagsize + $apetagheadersize + $lyrics3tagsize);

//if (preg_match('/APETAGEX.{24}TAG.{125}$/i', $APEfooterID3v1)) {
			if (substr($APEfooterID3v1, strlen($APEfooterID3v1) - $id3v1tagsize - $apetagheadersize, 8) == 'APETAGEX') {

// APE tag found before ID3v1
				$info['ape']['tag_offset_end'] = $info['filesize'] - $id3v1tagsize;

//} elseif (preg_match('/APETAGEX.{24}$/i', $APEfooterID3v1)) {
			} elseif (substr($APEfooterID3v1, strlen($APEfooterID3v1) - $apetagheadersize, 8) == 'APETAGEX') {

// APE tag found, no ID3v1
				$info['ape']['tag_offset_end'] = $info['filesize'];

}

} else {

$this->fseek($this->overrideendoffset - $apetagheadersize);
			if ($this->fread(8) == 'APETAGEX') {
				$info['ape']['tag_offset_end'] = $this->overrideendoffset;
			}

}
		if (!isset($info['ape']['tag_offset_end'])) {

// APE tag not found
			unset($info['ape']);
			return false;

}

// shortcut
		$thisfile_ape = &$info['ape'];

$this->fseek($thisfile_ape['tag_offset_end'] - $apetagheadersize);
		$APEfooterData = $this->fread(32);
		if (!($thisfile_ape['footer'] = $this->parseAPEheaderFooter($APEfooterData))) {
			$this->error('Error parsing APE footer at offset '.$thisfile_ape['tag_offset_end']);
			return false;
		}

if (isset($thisfile_ape['footer']['flags']['header']) && $thisfile_ape['footer']['flags']['header']) {
			$this->fseek($thisfile_ape['tag_offset_end'] - $thisfile_ape['footer']['raw']['tagsize'] - $apetagheadersize);
			$thisfile_ape['tag_offset_start'] = $this->ftell();
			$APEtagData = $this->fread($thisfile_ape['footer']['raw']['tagsize'] + $apetagheadersize);
		} else {
			$thisfile_ape['tag_offset_start'] = $thisfile_ape['tag_offset_end'] - $thisfile_ape['footer']['raw']['tagsize'];
			$this->fseek($thisfile_ape['tag_offset_start']);
			$APEtagData = $this->fread($thisfile_ape['footer']['raw']['tagsize']);
		}
		$info['avdataend'] = $thisfile_ape['tag_offset_start'];

if (isset($info['id3v1']['tag_offset_start']) && ($info['id3v1']['tag_offset_start'] < $thisfile_ape['tag_offset_end'])) {
			$this->warning('ID3v1 tag information ignored since it appears to be a false synch in APEtag data');
			unset($info['id3v1']);
			foreach ($info['warning'] as $key => $value) {
				if ($value == 'Some ID3v1 fields do not use NULL characters for padding') {
					unset($info['warning'][$key]);
					sort($info['warning']);
					break;
				}
			}
		}

$offset = 0;
		if (isset($thisfile_ape['footer']['flags']['header']) && $thisfile_ape['footer']['flags']['header']) {
			if ($thisfile_ape['header'] = $this->parseAPEheaderFooter(substr($APEtagData, 0, $apetagheadersize))) {
				$offset += $apetagheadersize;
			} else {
				$this->error('Error parsing APE header at offset '.$thisfile_ape['tag_offset_start']);
				return false;
			}
		}

// shortcut
		$info['replay_gain'] = array();
		$thisfile_replaygain = &$info['replay_gain'];

for ($i = 0; $i < $thisfile_ape['footer']['raw']['tag_items']; $i++) {
			$value_size = getid3_lib::LittleEndian2Int(substr($APEtagData, $offset, 4));
			$offset += 4;
			$item_flags = getid3_lib::LittleEndian2Int(substr($APEtagData, $offset, 4));
			$offset += 4;
			if (strstr(substr($APEtagData, $offset), "\x00") === false) {
				$this->error('Cannot find null-byte (0x00) separator between ItemKey #'.$i.' and value. ItemKey starts '.$offset.' bytes into the APE tag, at file offset '.($thisfile_ape['tag_offset_start'] + $offset));
				return false;
			}
			$ItemKeyLength = strpos($APEtagData, "\x00", $offset) - $offset;
			$item_key      = strtolower(substr($APEtagData, $offset, $ItemKeyLength));

// shortcut
			$thisfile_ape['items'][$item_key] = array();
			$thisfile_ape_items_current = &$thisfile_ape['items'][$item_key];

$thisfile_ape_items_current['offset'] = $thisfile_ape['tag_offset_start'] + $offset;

$offset += ($ItemKeyLength + 1); // skip 0x00 terminator
			$thisfile_ape_items_current['data'] = substr($APEtagData, $offset, $value_size);
			$offset += $value_size;

$thisfile_ape_items_current['flags'] = $this->parseAPEtagFlags($item_flags);
			switch ($thisfile_ape_items_current['flags']['item_contents_raw']) {
				case 0: // UTF-8
				case 2: // Locator (URL, filename, etc), UTF-8 encoded
					$thisfile_ape_items_current['data'] = explode("\x00", $thisfile_ape_items_current['data']);
					break;

case 1:  // binary data
				default:
					break;
			}

switch (strtolower($item_key)) {
				// http://wiki.hydrogenaud.io/index.php?title=ReplayGain#MP3Gain
				case 'replaygain_track_gain':
					if (preg_match('#^([\\-\\+][0-9\\.,]{8})( dB)?$#', $thisfile_ape_items_current['data'][0], $matches)) {
						$thisfile_replaygain['track']['adjustment'] = (float) str_replace(',', '.', $matches[1]); // float casting will see "0,95" as zero!
						$thisfile_replaygain['track']['originator'] = 'unspecified';
					} else {
						$this->warning('MP3gainTrackGain value in APEtag appears invalid: "'.$thisfile_ape_items_current['data'][0].'"');
					}
					break;

case 'replaygain_track_peak':
					if (preg_match('#^([0-9\\.,]{8})$#', $thisfile_ape_items_current['data'][0], $matches)) {
						$thisfile_replaygain['track']['peak']       = (float) str_replace(',', '.', $matches[1]); // float casting will see "0,95" as zero!
						$thisfile_replaygain['track']['originator'] = 'unspecified';
						if ($thisfile_replaygain['track']['peak'] <= 0) {
							$this->warning('ReplayGain Track peak from APEtag appears invalid: '.$thisfile_replaygain['track']['peak'].' (original value = "'.$thisfile_ape_items_current['data'][0].'")');
						}
					} else {
						$this->warning('MP3gainTrackPeak value in APEtag appears invalid: "'.$thisfile_ape_items_current['data'][0].'"');
					}
					break;

case 'replaygain_album_gain':
					if (preg_match('#^([\\-\\+][0-9\\.,]{8})( dB)?$#', $thisfile_ape_items_current['data'][0], $matches)) {
						$thisfile_replaygain['album']['adjustment'] = (float) str_replace(',', '.', $matches[1]); // float casting will see "0,95" as zero!
						$thisfile_replaygain['album']['originator'] = 'unspecified';
					} else {
						$this->warning('MP3gainAlbumGain value in APEtag appears invalid: "'.$thisfile_ape_items_current['data'][0].'"');
					}
					break;

case 'replaygain_album_peak':
					if (preg_match('#^([0-9\\.,]{8})$#', $thisfile_ape_items_current['data'][0], $matches)) {
						$thisfile_replaygain['album']['peak']       = (float) str_replace(',', '.', $matches[1]); // float casting will see "0,95" as zero!
						$thisfile_replaygain['album']['originator'] = 'unspecified';
						if ($thisfile_replaygain['album']['peak'] <= 0) {
							$this->warning('ReplayGain Album peak from APEtag appears invalid: '.$thisfile_replaygain['album']['peak'].' (original value = "'.$thisfile_ape_items_current['data'][0].'")');
						}
					} else {
						$this->warning('MP3gainAlbumPeak value in APEtag appears invalid: "'.$thisfile_ape_items_current['data'][0].'"');
					}
					break;

case 'mp3gain_undo':
					if (preg_match('#^[\\-\\+][0-9]{3},[\\-\\+][0-9]{3},[NW]$#', $thisfile_ape_items_current['data'][0])) {
						list($mp3gain_undo_left, $mp3gain_undo_right, $mp3gain_undo_wrap) = explode(',', $thisfile_ape_items_current['data'][0]);
						$thisfile_replaygain['mp3gain']['undo_left']  = intval($mp3gain_undo_left);
						$thisfile_replaygain['mp3gain']['undo_right'] = intval($mp3gain_undo_right);
						$thisfile_replaygain['mp3gain']['undo_wrap']  = (($mp3gain_undo_wrap == 'Y') ? true : false);
					} else {
						$this->warning('MP3gainUndo value in APEtag appears invalid: "'.$thisfile_ape_items_current['data'][0].'"');
					}
					break;

case 'mp3gain_minmax':
					if (preg_match('#^[0-9]{3},[0-9]{3}$#', $thisfile_ape_items_current['data'][0])) {
						list($mp3gain_globalgain_min, $mp3gain_globalgain_max) = explode(',', $thisfile_ape_items_current['data'][0]);
						$thisfile_replaygain['mp3gain']['globalgain_track_min'] = intval($mp3gain_globalgain_min);
						$thisfile_replaygain['mp3gain']['globalgain_track_max'] = intval($mp3gain_globalgain_max);
					} else {
						$this->warning('MP3gainMinMax value in APEtag appears invalid: "'.$thisfile_ape_items_current['data'][0].'"');
					}
					break;

case 'mp3gain_album_minmax':
					if (preg_match('#^[0-9]{3},[0-9]{3}$#', $thisfile_ape_items_current['data'][0])) {
						list($mp3gain_globalgain_album_min, $mp3gain_globalgain_album_max) = explode(',', $thisfile_ape_items_current['data'][0]);
						$thisfile_replaygain['mp3gain']['globalgain_album_min'] = intval($mp3gain_globalgain_album_min);
						$thisfile_replaygain['mp3gain']['globalgain_album_max'] = intval($mp3gain_globalgain_album_max);
					} else {
						$this->warning('MP3gainAlbumMinMax value in APEtag appears invalid: "'.$thisfile_ape_items_current['data'][0].'"');
					}
					break;

case 'tracknumber':
					if (is_array($thisfile_ape_items_current['data'])) {
						foreach ($thisfile_ape_items_current['data'] as $comment) {
							$thisfile_ape['comments']['track_number'][] = $comment;
						}
					}
					break;

case 'cover art (artist)':
				case 'cover art (back)':
				case 'cover art (band logo)':
				case 'cover art (band)':
				case 'cover art (colored fish)':
				case 'cover art (composer)':
				case 'cover art (conductor)':
				case 'cover art (front)':
				case 'cover art (icon)':
				case 'cover art (illustration)':
				case 'cover art (lead)':
				case 'cover art (leaflet)':
				case 'cover art (lyricist)':
				case 'cover art (media)':
				case 'cover art (movie scene)':
				case 'cover art (other icon)':
				case 'cover art (other)':
				case 'cover art (performance)':
				case 'cover art (publisher logo)':
				case 'cover art (recording)':
				case 'cover art (studio)':
					// list of possible cover arts from https://github.com/mono/taglib-sharp/blob/taglib-sharp-2.0.3.2/src/TagLib/Ape/Tag.cs
					if (is_array($thisfile_ape_items_current['data'])) {
						$this->warning('APEtag "'.$item_key.'" should be flagged as Binary data, but was incorrectly flagged as UTF-8');
						$thisfile_ape_items_current['data'] = implode("\x00", $thisfile_ape_items_current['data']);
					}
					list($thisfile_ape_items_current['filename'], $thisfile_ape_items_current['data']) = explode("\x00", $thisfile_ape_items_current['data'], 2);
					$thisfile_ape_items_current['data_offset'] = $thisfile_ape_items_current['offset'] + strlen($thisfile_ape_items_current['filename']."\x00");
					$thisfile_ape_items_current['data_length'] = strlen($thisfile_ape_items_current['data']);

do {
						$thisfile_ape_items_current['image_mime'] = '';
						$imageinfo = array();
						$imagechunkcheck = getid3_lib::GetDataImageSize($thisfile_ape_items_current['data'], $imageinfo);
						if (($imagechunkcheck === false) || !isset($imagechunkcheck[2])) {
							$this->warning('APEtag "'.$item_key.'" contains invalid image data');
							break;
						}
						$thisfile_ape_items_current['image_mime'] = image_type_to_mime_type($imagechunkcheck[2]);

if ($this->inline_attachments === false) {
							// skip entirely
							unset($thisfile_ape_items_current['data']);
							break;
						}
						if ($this->inline_attachments === true) {
							// great
						} elseif (is_int($this->inline_attachments)) {
							if ($this->inline_attachments < $thisfile_ape_items_current['data_length']) {
								// too big, skip
								$this->warning('attachment at '.$thisfile_ape_items_current['offset'].' is too large to process inline ('.number_format($thisfile_ape_items_current['data_length']).' bytes)');
								unset($thisfile_ape_items_current['data']);
								break;
							}
						} elseif (is_string($this->inline_attachments)) {
							$this->inline_attachments = rtrim(str_replace(array('/', '\\'), DIRECTORY_SEPARATOR, $this->inline_attachments), DIRECTORY_SEPARATOR);
							if (!is_dir($this->inline_attachments) || !getID3::is_writable($this->inline_attachments)) {
								// cannot write, skip
								$this->warning('attachment at '.$thisfile_ape_items_current['offset'].' cannot be saved to "'.$this->inline_attachments.'" (not writable)');
								unset($thisfile_ape_items_current['data']);
								break;
							}
						}
						// if we get this far, must be OK
						if (is_string($this->inline_attachments)) {
							$destination_filename = $this->inline_attachments.DIRECTORY_SEPARATOR.md5($info['filenamepath']).'_'.$thisfile_ape_items_current['data_offset'];
							if (!file_exists($destination_filename) || getID3::is_writable($destination_filename)) {
								file_put_contents($destination_filename, $thisfile_ape_items_current['data']);
							} else {
								$this->warning('attachment at '.$thisfile_ape_items_current['offset'].' cannot be saved to "'.$destination_filename.'" (not writable)');
							}
							$thisfile_ape_items_current['data_filename'] = $destination_filename;
							unset($thisfile_ape_items_current['data']);
						} else {
							if (!isset($info['ape']['comments']['picture'])) {
								$info['ape']['comments']['picture'] = array();
							}
							$comments_picture_data = array();
							foreach (array('data', 'image_mime', 'image_width', 'image_height', 'imagetype', 'picturetype', 'description', 'datalength') as $picture_key) {
								if (isset($thisfile_ape_items_current[$picture_key])) {
									$comments_picture_data[$picture_key] = $thisfile_ape_items_current[$picture_key];
								}
							}
							$info['ape']['comments']['picture'][] = $comments_picture_data;
							unset($comments_picture_data);
						}
					} while (false); // @phpstan-ignore-line
					break;

default:
					if (is_array($thisfile_ape_items_current['data'])) {
						foreach ($thisfile_ape_items_current['data'] as $comment) {
							$thisfile_ape['comments'][strtolower($item_key)][] = $comment;
						}
					}
					break;
			}

}
		if (empty($thisfile_replaygain)) {
			unset($info['replay_gain']);
		}
		return true;
	}

/**
	 * @param string $APEheaderFooterData
	 *
	 * @return array|false
	 */
	public function parseAPEheaderFooter($APEheaderFooterData) {
		// http://www.uni-jena.de/~pfk/mpp/sv8/apeheader.html

// shortcut
		$headerfooterinfo = array();
		$headerfooterinfo['raw'] = array();
		$headerfooterinfo_raw = &$headerfooterinfo['raw'];

$headerfooterinfo_raw['footer_tag']   =                  substr($APEheaderFooterData,  0, 8);
		if ($headerfooterinfo_raw['footer_tag'] != 'APETAGEX') {
			return false;
		}
		$headerfooterinfo_raw['version']      = getid3_lib::LittleEndian2Int(substr($APEheaderFooterData,  8, 4));
		$headerfooterinfo_raw['tagsize']      = getid3_lib::LittleEndian2Int(substr($APEheaderFooterData, 12, 4));
		$headerfooterinfo_raw['tag_items']    = getid3_lib::LittleEndian2Int(substr($APEheaderFooterData, 16, 4));
		$headerfooterinfo_raw['global_flags'] = getid3_lib::LittleEndian2Int(substr($APEheaderFooterData, 20, 4));
		$headerfooterinfo_raw['reserved']     =                              substr($APEheaderFooterData, 24, 8);

$headerfooterinfo['tag_version']         = $headerfooterinfo_raw['version'] / 1000;
		if ($headerfooterinfo['tag_version'] >= 2) {
			$headerfooterinfo['flags'] = $this->parseAPEtagFlags($headerfooterinfo_raw['global_flags']);
		}
		return $headerfooterinfo;
	}

/**
	 * @param int $rawflagint
	 *
	 * @return array
	 */
	public function parseAPEtagFlags($rawflagint) {
		// "Note: APE Tags 1.0 do not use any of the APE Tag flags.
		// All are set to zero on creation and ignored on reading."
		// http://wiki.hydrogenaud.io/index.php?title=Ape_Tags_Flags
		$flags                      = array();
		$flags['header']            = (bool) ($rawflagint & 0x80000000);
		$flags['footer']            = (bool) ($rawflagint & 0x40000000);
		$flags['this_is_header']    = (bool) ($rawflagint & 0x20000000);
		$flags['item_contents_raw'] =        ($rawflagint & 0x00000006) >> 1;
		$flags['read_only']         = (bool) ($rawflagint & 0x00000001);

$flags['item_contents']     = $this->APEcontentTypeFlagLookup($flags['item_contents_raw']);

return $flags;
	}

/**
	 * @param int $contenttypeid
	 *
	 * @return string
	 */
	public function APEcontentTypeFlagLookup($contenttypeid) {
		static $APEcontentTypeFlagLookup = array(
			0 => 'utf-8',
			1 => 'binary',
			2 => 'external',
			3 => 'reserved'
		);
		return (isset($APEcontentTypeFlagLookup[$contenttypeid]) ? $APEcontentTypeFlagLookup[$contenttypeid] : 'invalid');
	}

/**
	 * @param string $itemkey
	 *
	 * @return bool
	 */
	public function APEtagItemIsUTF8Lookup($itemkey) {
		static $APEtagItemIsUTF8Lookup = array(
			'title',
			'subtitle',
			'artist',
			'album',
			'debut album',
			'publisher',
			'conductor',
			'track',
			'composer',
			'comment',
			'copyright',
			'publicationright',
			'file',
			'year',
			'record date',
			'record location',
			'genre',
			'media',
			'related',
			'isrc',
			'abstract',
			'language',
			'bibliography'
		);
		return in_array(strtolower($itemkey), $APEtagItemIsUTF8Lookup);
	}

if (!defined('GETID3_LIBXML_OPTIONS') && defined('LIBXML_VERSION')) {
	if (LIBXML_VERSION >= 20621) {
		define('GETID3_LIBXML_OPTIONS', LIBXML_NOENT | LIBXML_NONET | LIBXML_NOWARNING | LIBXML_COMPACT);
	} else {
		define('GETID3_LIBXML_OPTIONS', LIBXML_NOENT | LIBXML_NONET | LIBXML_NOWARNING);
	}
}

class getid3_lib
{
	/**
	 * @param string      $string
	 * @param bool        $hex
	 * @param bool        $spaces
	 * @param string|bool $htmlencoding
	 *
	 * @return string
	 */
	public static function PrintHexBytes($string, $hex=true, $spaces=true, $htmlencoding='UTF-8') {
		$returnstring = '';
		for ($i = 0; $i < strlen($string); $i++) {
			if ($hex) {
				$returnstring .= str_pad(dechex(ord($string[$i])), 2, '0', STR_PAD_LEFT);
			} else {
				$returnstring .= ' '.(preg_match("#[\x20-\x7E]#", $string[$i]) ? $string[$i] : '¤');
			}
			if ($spaces) {
				$returnstring .= ' ';
			}
		}
		if (!empty($htmlencoding)) {
			if ($htmlencoding === true) {
				$htmlencoding = 'UTF-8'; // prior to getID3 v1.9.0 the function's 4th parameter was boolean
			}
			$returnstring = htmlentities($returnstring, ENT_QUOTES, $htmlencoding);
		}
		return $returnstring;
	}

/**
	 * Truncates a floating-point number at the decimal point.
	 *
	 * @param float $floatnumber
	 *
	 * @return float|int returns int (if possible, otherwise float)
	 */
	public static function trunc($floatnumber) {
		if ($floatnumber >= 1) {
			$truncatednumber = floor($floatnumber);
		} elseif ($floatnumber <= -1) {
			$truncatednumber = ceil($floatnumber);
		} else {
			$truncatednumber = 0;
		}
		if (self::intValueSupported($truncatednumber)) {
			$truncatednumber = (int) $truncatednumber;
		}
		return $truncatednumber;
	}

/**
	 * @param int|null $variable
	 * @param-out int  $variable
     * @param int      $increment
	 *
	 * @return bool
	 */
	public static function safe_inc(&$variable, $increment=1) {
		if (isset($variable)) {
			$variable += $increment;
		} else {
			$variable = $increment;
		}
		return true;
	}

/**
	 * @param int|float $floatnum
	 *
	 * @return int|float
	 */
	public static function CastAsInt($floatnum) {
		// convert to float if not already
		$floatnum = (float) $floatnum;

// convert a float to type int, only if possible
		if (self::trunc($floatnum) == $floatnum) {
			// it's not floating point
			if (self::intValueSupported($floatnum)) {
				// it's within int range
				$floatnum = (int) $floatnum;
			}
		}
		return $floatnum;
	}

/**
	 * @param int $num
	 *
	 * @return bool
	 */
	public static function intValueSupported($num) {
		// check if integers are 64-bit
		static $hasINT64 = null;
		if ($hasINT64 === null) { // 10x faster than is_null()
			/** @var int|float|object $bigInt */
			$bigInt = pow(2, 31);
			$hasINT64 = is_int($bigInt); // 32-bit int are limited to (2^31)-1
			if (!$hasINT64 && !defined('PHP_INT_MIN')) {
				define('PHP_INT_MIN', ~PHP_INT_MAX);
			}
		}
		// if integers are 64-bit - no other check required
		if ($hasINT64 || (($num <= PHP_INT_MAX) && ($num >= PHP_INT_MIN))) {
			return true;
		}
		return false;
	}

/**
	 * Perform a division, guarding against division by zero
	 *
	 * @param float|int $numerator
	 * @param float|int $denominator
	 * @param float|int $fallback
	 * @return float|int
	 */
	public static function SafeDiv($numerator, $denominator, $fallback = 0) {
		return $denominator ? $numerator / $denominator : $fallback;
	}

/**
	 * @param string $fraction
	 *
	 * @return float
	 */
	public static function DecimalizeFraction($fraction) {
		list($numerator, $denominator) = explode('/', $fraction);
		return (int) $numerator / ($denominator ? $denominator : 1);
	}

/**
	 * @param string $binarynumerator
	 *
	 * @return float
	 */
	public static function DecimalBinary2Float($binarynumerator) {
		$numerator   = self::Bin2Dec($binarynumerator);
		$denominator = self::Bin2Dec('1'.str_repeat('0', strlen($binarynumerator)));
		return ($numerator / $denominator);
	}

/**
	 * @link http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/binary.html
	 *
	 * @param string $binarypointnumber
	 * @param int    $maxbits
	 *
	 * @return array
	 */
	public static function NormalizeBinaryPoint($binarypointnumber, $maxbits=52) {
		if (strpos($binarypointnumber, '.') === false) {
			$binarypointnumber = '0.'.$binarypointnumber;
		} elseif ($binarypointnumber[0] == '.') {
			$binarypointnumber = '0'.$binarypointnumber;
		}
		$exponent = 0;
		while (($binarypointnumber[0] != '1') || (substr($binarypointnumber, 1, 1) != '.')) {
			if (substr($binarypointnumber, 1, 1) == '.') {
				$exponent--;
				$binarypointnumber = substr($binarypointnumber, 2, 1).'.'.substr($binarypointnumber, 3);
			} else {
				$pointpos = strpos($binarypointnumber, '.');
				$exponent += ($pointpos - 1);
				$binarypointnumber = str_replace('.', '', $binarypointnumber);
				$binarypointnumber = $binarypointnumber[0].'.'.substr($binarypointnumber, 1);
			}
		}
		$binarypointnumber = str_pad(substr($binarypointnumber, 0, $maxbits + 2), $maxbits + 2, '0', STR_PAD_RIGHT);
		return array('normalized'=>$binarypointnumber, 'exponent'=>(int) $exponent);
	}

/**
	 * @link http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/binary.html
	 *
	 * @param float $floatvalue
	 *
	 * @return string
	 */
	public static function Float2BinaryDecimal($floatvalue) {
		$maxbits = 128; // to how many bits of precision should the calculations be taken?
		$intpart   = self::trunc($floatvalue);
		$floatpart = abs($floatvalue - $intpart);
		$pointbitstring = '';
		while (($floatpart != 0) && (strlen($pointbitstring) < $maxbits)) {
			$floatpart *= 2;
			$pointbitstring .= (string) self::trunc($floatpart);
			$floatpart -= self::trunc($floatpart);
		}
		$binarypointnumber = decbin($intpart).'.'.$pointbitstring;
		return $binarypointnumber;
	}

/**
	 * @link http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/ieee-expl.html
	 *
	 * @param float $floatvalue
	 * @param int $bits
	 *
	 * @return string|false
	 */
	public static function Float2String($floatvalue, $bits) {
		$exponentbits = 0;
		$fractionbits = 0;
		switch ($bits) {
			case 32:
				$exponentbits = 8;
				$fractionbits = 23;
				break;

case 64:
				$exponentbits = 11;
				$fractionbits = 52;
				break;

default:
				return false;
		}
		if ($floatvalue >= 0) {
			$signbit = '0';
		} else {
			$signbit = '1';
		}
		$normalizedbinary  = self::NormalizeBinaryPoint(self::Float2BinaryDecimal($floatvalue), $fractionbits);
		$biasedexponent    = pow(2, $exponentbits - 1) - 1 + $normalizedbinary['exponent']; // (127 or 1023) +/- exponent
		$exponentbitstring = str_pad(decbin($biasedexponent), $exponentbits, '0', STR_PAD_LEFT);
		$fractionbitstring = str_pad(substr($normalizedbinary['normalized'], 2), $fractionbits, '0', STR_PAD_RIGHT);

return self::BigEndian2String(self::Bin2Dec($signbit.$exponentbitstring.$fractionbitstring), $bits % 8, false);
	}

/**
	 * @param string $byteword
	 *
	 * @return float|false
	 */
	public static function LittleEndian2Float($byteword) {
		return self::BigEndian2Float(strrev($byteword));
	}

/**
	 * ANSI/IEEE Standard 754-1985, Standard for Binary Floating Point Arithmetic
	 *
	 * @link https://web.archive.org/web/20120325162206/http://www.psc.edu/general/software/packages/ieee/ieee.php
	 * @link http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/ieee.html
	 *
	 * @param string $byteword
	 *
	 * @return float|false
	 */
	public static function BigEndian2Float($byteword) {
		$bitword = self::BigEndian2Bin($byteword);
		if (!$bitword) {
			return 0;
		}
		$signbit = $bitword[0];
		$floatvalue = 0;
		$exponentbits = 0;
		$fractionbits = 0;

switch (strlen($byteword) * 8) {
			case 32:
				$exponentbits = 8;
				$fractionbits = 23;
				break;

case 64:
				$exponentbits = 11;
				$fractionbits = 52;
				break;

case 80:
				// 80-bit Apple SANE format
				// http://www.mactech.com/articles/mactech/Vol.06/06.01/SANENormalized/
				$exponentstring = substr($bitword, 1, 15);
				$isnormalized = intval($bitword[16]);
				$fractionstring = substr($bitword, 17, 63);
				$exponent = pow(2, self::Bin2Dec($exponentstring) - 16383);
				$fraction = $isnormalized + self::DecimalBinary2Float($fractionstring);
				$floatvalue = $exponent * $fraction;
				if ($signbit == '1') {
					$floatvalue *= -1;
				}
				return $floatvalue;

default:
				return false;
		}
		$exponentstring = substr($bitword, 1, $exponentbits);
		$fractionstring = substr($bitword, $exponentbits + 1, $fractionbits);
		$exponent = self::Bin2Dec($exponentstring);
		$fraction = self::Bin2Dec($fractionstring);

if (($exponent == (pow(2, $exponentbits) - 1)) && ($fraction != 0)) {
			// Not a Number
			$floatvalue = NAN;
		} elseif (($exponent == (pow(2, $exponentbits) - 1)) && ($fraction == 0)) {
			if ($signbit == '1') {
				$floatvalue = -INF;
			} else {
				$floatvalue = INF;
			}
		} elseif (($exponent == 0) && ($fraction == 0)) {
			if ($signbit == '1') {
				$floatvalue = -0.0;
			} else {
				$floatvalue = 0.0;
			}
		} elseif (($exponent == 0) && ($fraction != 0)) {
			// These are 'unnormalized' values
			$floatvalue = pow(2, (-1 * (pow(2, $exponentbits - 1) - 2))) * self::DecimalBinary2Float($fractionstring);
			if ($signbit == '1') {
				$floatvalue *= -1;
			}
		} elseif ($exponent != 0) {
			$floatvalue = pow(2, ($exponent - (pow(2, $exponentbits - 1) - 1))) * (1 + self::DecimalBinary2Float($fractionstring));
			if ($signbit == '1') {
				$floatvalue *= -1;
			}
		}
		return (float) $floatvalue;
	}

/**
	 * @param string $byteword
	 * @param bool   $synchsafe
	 * @param bool   $signed
	 *
	 * @return int|float|false
	 * @throws Exception
	 */
	public static function BigEndian2Int($byteword, $synchsafe=false, $signed=false) {
		$intvalue = 0;
		$bytewordlen = strlen($byteword);
		if ($bytewordlen == 0) {
			return false;
		}
		for ($i = 0; $i < $bytewordlen; $i++) {
			if ($synchsafe) { // disregard MSB, effectively 7-bit bytes
				//$intvalue = $intvalue | (ord($byteword{$i}) & 0x7F) << (($bytewordlen - 1 - $i) * 7); // faster, but runs into problems past 2^31 on 32-bit systems
				$intvalue += (ord($byteword[$i]) & 0x7F) * pow(2, ($bytewordlen - 1 - $i) * 7);
			} else {
				$intvalue += ord($byteword[$i]) * pow(256, ($bytewordlen - 1 - $i));
			}
		}
		if ($signed && !$synchsafe) {
			// synchsafe ints are not allowed to be signed
			if ($bytewordlen <= PHP_INT_SIZE) {
				$signMaskBit = 0x80 << (8 * ($bytewordlen - 1));
				if ($intvalue & $signMaskBit) {
					$intvalue = 0 - ($intvalue & ($signMaskBit - 1));
				}
			} else {
				throw new Exception('ERROR: Cannot have signed integers larger than '.(8 * PHP_INT_SIZE).'-bits ('.strlen($byteword).') in self::BigEndian2Int()');
			}
		}
		return self::CastAsInt($intvalue);
	}

/**
	 * @param string $byteword
	 * @param bool   $signed
	 *
	 * @return int|float|false
	 */
	public static function LittleEndian2Int($byteword, $signed=false) {
		return self::BigEndian2Int(strrev($byteword), false, $signed);
	}

/**
	 * @param string $byteword
	 *
	 * @return string
	 */
	public static function LittleEndian2Bin($byteword) {
		return self::BigEndian2Bin(strrev($byteword));
	}

/**
	 * @param string $byteword
	 *
	 * @return string
	 */
	public static function BigEndian2Bin($byteword) {
		$binvalue = '';
		$bytewordlen = strlen($byteword);
		for ($i = 0; $i < $bytewordlen; $i++) {
			$binvalue .= str_pad(decbin(ord($byteword[$i])), 8, '0', STR_PAD_LEFT);
		}
		return $binvalue;
	}

/**
	 * @param int  $number
	 * @param int  $minbytes
	 * @param bool $synchsafe
	 * @param bool $signed
	 *
	 * @return string
	 * @throws Exception
	 */
	public static function BigEndian2String($number, $minbytes=1, $synchsafe=false, $signed=false) {
		if ($number < 0) {
			throw new Exception('ERROR: self::BigEndian2String() does not support negative numbers');
		}
		$maskbyte = (($synchsafe || $signed) ? 0x7F : 0xFF);
		$intstring = '';
		if ($signed) {
			if ($minbytes > PHP_INT_SIZE) {
				throw new Exception('ERROR: Cannot have signed integers larger than '.(8 * PHP_INT_SIZE).'-bits in self::BigEndian2String()');
			}
			$number = $number & (0x80 << (8 * ($minbytes - 1)));
		}
		while ($number != 0) {
			$quotient = ($number / ($maskbyte + 1));
			$intstring = chr(ceil(($quotient - floor($quotient)) * $maskbyte)).$intstring;
			$number = floor($quotient);
		}
		return str_pad($intstring, $minbytes, "\x00", STR_PAD_LEFT);
	}

/**
	 * @param int|string $number
	 *
	 * @return string
	 */
	public static function Dec2Bin($number) {
		if (!is_numeric($number)) {
			// https://github.com/JamesHeinrich/getID3/issues/299
			trigger_error('TypeError: Dec2Bin(): Argument #1 ($number) must be numeric, '.gettype($number).' given', E_USER_WARNING);
			return '';
		}
		$bytes = array();
		while ($number >= 256) {
			$bytes[] = (int) (($number / 256) - (floor($number / 256))) * 256;
			$number = floor($number / 256);
		}
		$bytes[] = (int) $number;
		$binstring = '';
		foreach ($bytes as $i => $byte) {
			$binstring = (($i == count($bytes) - 1) ? decbin($byte) : str_pad(decbin($byte), 8, '0', STR_PAD_LEFT)).$binstring;
		}
		return $binstring;
	}

/**
	 * @param string $binstring
	 * @param bool   $signed
	 *
	 * @return int|float
	 */
	public static function Bin2Dec($binstring, $signed=false) {
		$signmult = 1;
		if ($signed) {
			if ($binstring[0] == '1') {
				$signmult = -1;
			}
			$binstring = substr($binstring, 1);
		}
		$decvalue = 0;
		for ($i = 0; $i < strlen($binstring); $i++) {
			$decvalue += ((int) substr($binstring, strlen($binstring) - $i - 1, 1)) * pow(2, $i);
		}
		return self::CastAsInt($decvalue * $signmult);
	}

/**
	 * @param string $binstring
	 *
	 * @return string
	 */
	public static function Bin2String($binstring) {
		// return 'hi' for input of '0110100001101001'
		$string = '';
		$binstringreversed = strrev($binstring);
		for ($i = 0; $i < strlen($binstringreversed); $i += 8) {
			$string = chr(self::Bin2Dec(strrev(substr($binstringreversed, $i, 8)))).$string;
		}
		return $string;
	}

/**
	 * @param int  $number
	 * @param int  $minbytes
	 * @param bool $synchsafe
	 *
	 * @return string
	 */
	public static function LittleEndian2String($number, $minbytes=1, $synchsafe=false) {
		$intstring = '';
		while ($number > 0) {
			if ($synchsafe) {
				$intstring = $intstring.chr($number & 127);
				$number >>= 7;
			} else {
				$intstring = $intstring.chr($number & 255);
				$number >>= 8;
			}
		}
		return str_pad($intstring, $minbytes, "\x00", STR_PAD_RIGHT);
	}

/**
	 * @param mixed $array1
	 * @param mixed $array2
	 *
	 * @return array|false
	 */
	public static function array_merge_clobber($array1, $array2) {
		// written by kcØhireability*com
		// taken from http://www.php.net/manual/en/function.array-merge-recursive.php
		if (!is_array($array1) || !is_array($array2)) {
			return false;
		}
		$newarray = $array1;
		foreach ($array2 as $key => $val) {
			if (is_array($val) && isset($newarray[$key]) && is_array($newarray[$key])) {
				$newarray[$key] = self::array_merge_clobber($newarray[$key], $val);
			} else {
				$newarray[$key] = $val;
			}
		}
		return $newarray;
	}

/**
	 * @param mixed $array1
	 * @param mixed $array2
	 *
	 * @return array|false
	 */
	public static function array_merge_noclobber($array1, $array2) {
		if (!is_array($array1) || !is_array($array2)) {
			return false;
		}
		$newarray = $array1;
		foreach ($array2 as $key => $val) {
			if (is_array($val) && isset($newarray[$key]) && is_array($newarray[$key])) {
				$newarray[$key] = self::array_merge_noclobber($newarray[$key], $val);
			} elseif (!isset($newarray[$key])) {
				$newarray[$key] = $val;
			}
		}
		return $newarray;
	}

/**
	 * @param mixed $array1
	 * @param mixed $array2
	 *
	 * @return array|false|null
	 */
	public static function flipped_array_merge_noclobber($array1, $array2) {
		if (!is_array($array1) || !is_array($array2)) {
			return false;
		}
		# naturally, this only works non-recursively
		$newarray = array_flip($array1);
		foreach (array_flip($array2) as $key => $val) {
			if (!isset($newarray[$key])) {
				$newarray[$key] = count($newarray);
			}
		}
		return array_flip($newarray);
	}

/**
	 * @param array $theArray
	 *
	 * @return bool
	 */
	public static function ksort_recursive(&$theArray) {
		ksort($theArray);
		foreach ($theArray as $key => $value) {
			if (is_array($value)) {
				self::ksort_recursive($theArray[$key]);
			}
		}
		return true;
	}

/**
	 * @param string $filename
	 * @param int    $numextensions
	 *
	 * @return string
	 */
	public static function fileextension($filename, $numextensions=1) {
		if (strstr($filename, '.')) {
			$reversedfilename = strrev($filename);
			$offset = 0;
			for ($i = 0; $i < $numextensions; $i++) {
				$offset = strpos($reversedfilename, '.', $offset + 1);
				if ($offset === false) {
					return '';
				}
			}
			return strrev(substr($reversedfilename, 0, $offset));
		}
		return '';
	}

/**
	 * @param int $seconds
	 *
	 * @return string
	 */
	public static function PlaytimeString($seconds) {
		$sign = (($seconds < 0) ? '-' : '');
		$seconds = round(abs($seconds));
		$H = (int) floor( $seconds                            / 3600);
		$M = (int) floor(($seconds - (3600 * $H)            ) /   60);
		$S = (int) round( $seconds - (3600 * $H) - (60 * $M)        );
		return $sign.($H ? $H.':' : '').($H ? str_pad($M, 2, '0', STR_PAD_LEFT) : intval($M)).':'.str_pad($S, 2, 0, STR_PAD_LEFT);
	}

/**
	 * @param int $macdate
	 *
	 * @return int|float
	 */
	public static function DateMac2Unix($macdate) {
		// Macintosh timestamp: seconds since 00:00h January 1, 1904
		// UNIX timestamp:      seconds since 00:00h January 1, 1970
		return self::CastAsInt($macdate - 2082844800);
	}

/**
	 * @param string $rawdata
	 *
	 * @return float
	 */
	public static function FixedPoint8_8($rawdata) {
		return self::BigEndian2Int(substr($rawdata, 0, 1)) + (float) (self::BigEndian2Int(substr($rawdata, 1, 1)) / pow(2, 8));
	}

/**
	 * @param string $rawdata
	 *
	 * @return float
	 */
	public static function FixedPoint16_16($rawdata) {
		return self::BigEndian2Int(substr($rawdata, 0, 2)) + (float) (self::BigEndian2Int(substr($rawdata, 2, 2)) / pow(2, 16));
	}

/**
	 * @param string $rawdata
	 *
	 * @return float
	 */
	public static function FixedPoint2_30($rawdata) {
		$binarystring = self::BigEndian2Bin($rawdata);
		return self::Bin2Dec(substr($binarystring, 0, 2)) + (float) (self::Bin2Dec(substr($binarystring, 2, 30)) / pow(2, 30));
	}

/**
	 * @param string $ArrayPath
	 * @param string $Separator
	 * @param mixed $Value
	 *
	 * @return array
	 */
	public static function CreateDeepArray($ArrayPath, $Separator, $Value) {
		// assigns $Value to a nested array path:
		//   $foo = self::CreateDeepArray('/path/to/my', '/', 'file.txt')
		// is the same as:
		//   $foo = array('path'=>array('to'=>'array('my'=>array('file.txt'))));
		// or
		//   $foo['path']['to']['my'] = 'file.txt';
		$ArrayPath = ltrim($ArrayPath, $Separator);
		$ReturnedArray = array();
		if (($pos = strpos($ArrayPath, $Separator)) !== false) {
			$ReturnedArray[substr($ArrayPath, 0, $pos)] = self::CreateDeepArray(substr($ArrayPath, $pos + 1), $Separator, $Value);
		} else {
			$ReturnedArray[$ArrayPath] = $Value;
		}
		return $ReturnedArray;
	}

/**
	 * @param array $arraydata
	 * @param bool  $returnkey
	 *
	 * @return int|false
	 */
	public static function array_max($arraydata, $returnkey=false) {
		$maxvalue = false;
		$maxkey   = false;
		foreach ($arraydata as $key => $value) {
			if (!is_array($value)) {
				if (($maxvalue === false) || ($value > $maxvalue)) {
					$maxvalue = $value;
					$maxkey = $key;
				}
			}
		}
		return ($returnkey ? $maxkey : $maxvalue);
	}

/**
	 * @param array $arraydata
	 * @param bool  $returnkey
	 *
	 * @return int|false
	 */
	public static function array_min($arraydata, $returnkey=false) {
		$minvalue = false;
		$minkey   = false;
		foreach ($arraydata as $key => $value) {
			if (!is_array($value)) {
				if (($minvalue === false) || ($value < $minvalue)) {
					$minvalue = $value;
					$minkey = $key;
				}
			}
		}
		return ($returnkey ? $minkey : $minvalue);
	}

/**
	 * @param string $XMLstring
	 *
	 * @return array|false
	 */
	public static function XML2array($XMLstring) {
		if (function_exists('simplexml_load_string')) {
			if (PHP_VERSION_ID < 80000) {
				if (function_exists('libxml_disable_entity_loader')) {
					// http://websec.io/2012/08/27/Preventing-XEE-in-PHP.html
					// https://core.trac.wordpress.org/changeset/29378
					// This function has been deprecated in PHP 8.0 because in libxml 2.9.0, external entity loading is
					// disabled by default, but is still needed when LIBXML_NOENT is used.
					$loader = @libxml_disable_entity_loader(true);
					$XMLobject = simplexml_load_string($XMLstring, 'SimpleXMLElement', GETID3_LIBXML_OPTIONS);
					$return = self::SimpleXMLelement2array($XMLobject);
					@libxml_disable_entity_loader($loader);
					return $return;
				}
			} else {
				$allow = false;
				if (defined('LIBXML_VERSION') && (LIBXML_VERSION >= 20900)) {
					// https://www.php.net/manual/en/function.libxml-disable-entity-loader.php
					// "as of libxml 2.9.0 entity substitution is disabled by default, so there is no need to disable the loading
					//  of external entities, unless there is the need to resolve internal entity references with LIBXML_NOENT."
					$allow = true;
				} elseif (function_exists('libxml_set_external_entity_loader')) {
					libxml_set_external_entity_loader(function () { return null; }); // https://www.zend.com/blog/cve-2023-3823
					$allow = true;
				}
				if ($allow) {
					$XMLobject = simplexml_load_string($XMLstring, 'SimpleXMLElement', GETID3_LIBXML_OPTIONS);
					$return = self::SimpleXMLelement2array($XMLobject);
					return $return;
				}
			}
		}
		return false;
	}

/**
	* @param SimpleXMLElement|array|mixed $XMLobject
	*
	* @return mixed
	*/
	public static function SimpleXMLelement2array($XMLobject) {
		if (!is_object($XMLobject) && !is_array($XMLobject)) {
			return $XMLobject;
		}
		$XMLarray = $XMLobject instanceof SimpleXMLElement ? get_object_vars($XMLobject) : $XMLobject;
		foreach ($XMLarray as $key => $value) {
			$XMLarray[$key] = self::SimpleXMLelement2array($value);
		}
		return $XMLarray;
	}

/**
	 * Returns checksum for a file from starting position to absolute end position.
	 *
	 * @param string $file
	 * @param int    $offset
	 * @param int    $end
	 * @param string $algorithm
	 *
	 * @return string|false
	 * @throws getid3_exception
	 */
	public static function hash_data($file, $offset, $end, $algorithm) {
		if (!self::intValueSupported($end)) {
			return false;
		}
		if (!in_array($algorithm, array('md5', 'sha1'))) {
			throw new getid3_exception('Invalid algorithm ('.$algorithm.') in self::hash_data()');
		}

$size = $end - $offset;

$fp = fopen($file, 'rb');
		fseek($fp, $offset);
		$ctx = hash_init($algorithm);
		while ($size > 0) {
			$buffer = fread($fp, min($size, getID3::FREAD_BUFFER_SIZE));
			hash_update($ctx, $buffer);
			$size -= getID3::FREAD_BUFFER_SIZE;
		}
		$hash = hash_final($ctx);
		fclose($fp);

return $hash;
	}

/**
	 * @param string $filename_source
	 * @param string $filename_dest
	 * @param int    $offset
	 * @param int    $length
	 *
	 * @return bool
	 * @throws Exception
	 *
	 * @deprecated Unused, may be removed in future versions of getID3
	 */
	public static function CopyFileParts($filename_source, $filename_dest, $offset, $length) {
		if (!self::intValueSupported($offset + $length)) {
			throw new Exception('cannot copy file portion, it extends beyond the '.round(PHP_INT_MAX / 1073741824).'GB limit');
		}
		if (is_readable($filename_source) && is_file($filename_source) && ($fp_src = fopen($filename_source, 'rb'))) {
			if (($fp_dest = fopen($filename_dest, 'wb'))) {
				if (fseek($fp_src, $offset) == 0) {
					$byteslefttowrite = $length;
					while (($byteslefttowrite > 0) && ($buffer = fread($fp_src, min($byteslefttowrite, getID3::FREAD_BUFFER_SIZE)))) {
						$byteswritten = fwrite($fp_dest, $buffer, $byteslefttowrite);
						$byteslefttowrite -= $byteswritten;
					}
					fclose($fp_dest);
					return true;
				} else {
					fclose($fp_src);
					throw new Exception('failed to seek to offset '.$offset.' in '.$filename_source);
				}
			} else {
				throw new Exception('failed to create file for writing '.$filename_dest);
			}
		} else {
			throw new Exception('failed to open file for reading '.$filename_source);
		}
	}

/**
	 * @param int $charval
	 *
	 * @return string
	 */
	public static function iconv_fallback_int_utf8($charval) {
		if ($charval < 128) {
			// 0bbbbbbb
			$newcharstring = chr($charval);
		} elseif ($charval < 2048) {
			// 110bbbbb 10bbbbbb
			$newcharstring  = chr(($charval >>   6) | 0xC0);
			$newcharstring .= chr(($charval & 0x3F) | 0x80);
		} elseif ($charval < 65536) {
			// 1110bbbb 10bbbbbb 10bbbbbb
			$newcharstring  = chr(($charval >>  12) | 0xE0);
			$newcharstring .= chr(($charval >>   6) | 0xC0);
			$newcharstring .= chr(($charval & 0x3F) | 0x80);
		} else {
			// 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb
			$newcharstring  = chr(($charval >>  18) | 0xF0);
			$newcharstring .= chr(($charval >>  12) | 0xC0);
			$newcharstring .= chr(($charval >>   6) | 0xC0);
			$newcharstring .= chr(($charval & 0x3F) | 0x80);
		}
		return $newcharstring;
	}

/**
	 * ISO-8859-1 => UTF-8
	 *
	 * @param string $string
	 * @param bool   $bom
	 *
	 * @return string
	 */
	public static function iconv_fallback_iso88591_utf8($string, $bom=false) {
		$newcharstring = '';
		if ($bom) {
			$newcharstring .= "\xEF\xBB\xBF";
		}
		for ($i = 0; $i < strlen($string); $i++) {
			$charval = ord($string[$i]);
			$newcharstring .= self::iconv_fallback_int_utf8($charval);
		}
		return $newcharstring;
	}

/**
	 * ISO-8859-1 => UTF-16BE
	 *
	 * @param string $string
	 * @param bool   $bom
	 *
	 * @return string
	 */
	public static function iconv_fallback_iso88591_utf16be($string, $bom=false) {
		$newcharstring = '';
		if ($bom) {
			$newcharstring .= "\xFE\xFF";
		}
		for ($i = 0; $i < strlen($string); $i++) {
			$newcharstring .= "\x00".$string[$i];
		}
		return $newcharstring;
	}

/**
	 * ISO-8859-1 => UTF-16LE
	 *
	 * @param string $string
	 * @param bool   $bom
	 *
	 * @return string
	 */
	public static function iconv_fallback_iso88591_utf16le($string, $bom=false) {
		$newcharstring = '';
		if ($bom) {
			$newcharstring .= "\xFF\xFE";
		}
		for ($i = 0; $i < strlen($string); $i++) {
			$newcharstring .= $string[$i]."\x00";
		}
		return $newcharstring;
	}

/**
	 * ISO-8859-1 => UTF-16LE (BOM)
	 *
	 * @param string $string
	 *
	 * @return string
	 */
	public static function iconv_fallback_iso88591_utf16($string) {
		return self::iconv_fallback_iso88591_utf16le($string, true);
	}

/**
	 * UTF-8 => ISO-8859-1
	 *
	 * @param string $string
	 *
	 * @return string
	 */
	public static function iconv_fallback_utf8_iso88591($string) {
		$newcharstring = '';
		$offset = 0;
		$stringlength = strlen($string);
		while ($offset < $stringlength) {
			if ((ord($string[$offset]) | 0x07) == 0xF7) {
				// 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb
				$charval = ((ord($string[($offset + 0)]) & 0x07) << 18) &
						   ((ord($string[($offset + 1)]) & 0x3F) << 12) &
						   ((ord($string[($offset + 2)]) & 0x3F) <<  6) &
							(ord($string[($offset + 3)]) & 0x3F);
				$offset += 4;
			} elseif ((ord($string[$offset]) | 0x0F) == 0xEF) {
				// 1110bbbb 10bbbbbb 10bbbbbb
				$charval = ((ord($string[($offset + 0)]) & 0x0F) << 12) &
						   ((ord($string[($offset + 1)]) & 0x3F) <<  6) &
							(ord($string[($offset + 2)]) & 0x3F);
				$offset += 3;
			} elseif ((ord($string[$offset]) | 0x1F) == 0xDF) {
				// 110bbbbb 10bbbbbb
				$charval = ((ord($string[($offset + 0)]) & 0x1F) <<  6) &
							(ord($string[($offset + 1)]) & 0x3F);
				$offset += 2;
			} elseif ((ord($string[$offset]) | 0x7F) == 0x7F) {
				// 0bbbbbbb
				$charval = ord($string[$offset]);
				$offset += 1;
			} else {
				// error? throw some kind of warning here?
				$charval = false;
				$offset += 1;
			}
			if ($charval !== false) {
				$newcharstring .= (($charval < 256) ? chr($charval) : '?');
			}
		}
		return $newcharstring;
	}

/**
	 * UTF-8 => UTF-16BE
	 *
	 * @param string $string
	 * @param bool   $bom
	 *
	 * @return string
	 */
	public static function iconv_fallback_utf8_utf16be($string, $bom=false) {
		$newcharstring = '';
		if ($bom) {
			$newcharstring .= "\xFE\xFF";
		}
		$offset = 0;
		$stringlength = strlen($string);
		while ($offset < $stringlength) {
			if ((ord($string[$offset]) | 0x07) == 0xF7) {
				// 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb
				$charval = ((ord($string[($offset + 0)]) & 0x07) << 18) &
						   ((ord($string[($offset + 1)]) & 0x3F) << 12) &
						   ((ord($string[($offset + 2)]) & 0x3F) <<  6) &
							(ord($string[($offset + 3)]) & 0x3F);
				$offset += 4;
			} elseif ((ord($string[$offset]) | 0x0F) == 0xEF) {
				// 1110bbbb 10bbbbbb 10bbbbbb
				$charval = ((ord($string[($offset + 0)]) & 0x0F) << 12) &
						   ((ord($string[($offset + 1)]) & 0x3F) <<  6) &
							(ord($string[($offset + 2)]) & 0x3F);
				$offset += 3;
			} elseif ((ord($string[$offset]) | 0x1F) == 0xDF) {
				// 110bbbbb 10bbbbbb
				$charval = ((ord($string[($offset + 0)]) & 0x1F) <<  6) &
							(ord($string[($offset + 1)]) & 0x3F);
				$offset += 2;
			} elseif ((ord($string[$offset]) | 0x7F) == 0x7F) {
				// 0bbbbbbb
				$charval = ord($string[$offset]);
				$offset += 1;
			} else {
				// error? throw some kind of warning here?
				$charval = false;
				$offset += 1;
			}
			if ($charval !== false) {
				$newcharstring .= (($charval < 65536) ? self::BigEndian2String($charval, 2) : "\x00".'?');
			}
		}
		return $newcharstring;
	}

/**
	 * UTF-8 => UTF-16LE
	 *
	 * @param string $string
	 * @param bool   $bom
	 *
	 * @return string
	 */
	public static function iconv_fallback_utf8_utf16le($string, $bom=false) {
		$newcharstring = '';
		if ($bom) {
			$newcharstring .= "\xFF\xFE";
		}
		$offset = 0;
		$stringlength = strlen($string);
		while ($offset < $stringlength) {
			if ((ord($string[$offset]) | 0x07) == 0xF7) {
				// 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb
				$charval = ((ord($string[($offset + 0)]) & 0x07) << 18) &
						   ((ord($string[($offset + 1)]) & 0x3F) << 12) &
						   ((ord($string[($offset + 2)]) & 0x3F) <<  6) &
							(ord($string[($offset + 3)]) & 0x3F);
				$offset += 4;
			} elseif ((ord($string[$offset]) | 0x0F) == 0xEF) {
				// 1110bbbb 10bbbbbb 10bbbbbb
				$charval = ((ord($string[($offset + 0)]) & 0x0F) << 12) &
						   ((ord($string[($offset + 1)]) & 0x3F) <<  6) &
							(ord($string[($offset + 2)]) & 0x3F);
				$offset += 3;
			} elseif ((ord($string[$offset]) | 0x1F) == 0xDF) {
				// 110bbbbb 10bbbbbb
				$charval = ((ord($string[($offset + 0)]) & 0x1F) <<  6) &
							(ord($string[($offset + 1)]) & 0x3F);
				$offset += 2;
			} elseif ((ord($string[$offset]) | 0x7F) == 0x7F) {
				// 0bbbbbbb
				$charval = ord($string[$offset]);
				$offset += 1;
			} else {
				// error? maybe throw some warning here?
				$charval = false;
				$offset += 1;
			}
			if ($charval !== false) {
				$newcharstring .= (($charval < 65536) ? self::LittleEndian2String($charval, 2) : '?'."\x00");
			}
		}
		return $newcharstring;
	}

/**
	 * UTF-8 => UTF-16LE (BOM)
	 *
	 * @param string $string
	 *
	 * @return string
	 */
	public static function iconv_fallback_utf8_utf16($string) {
		return self::iconv_fallback_utf8_utf16le($string, true);
	}

/**
	 * UTF-16BE => UTF-8
	 *
	 * @param string $string
	 *
	 * @return string
	 */
	public static function iconv_fallback_utf16be_utf8($string) {
		if (substr($string, 0, 2) == "\xFE\xFF") {
			// strip BOM
			$string = substr($string, 2);
		}
		$newcharstring = '';
		for ($i = 0; $i < strlen($string); $i += 2) {
			$charval = self::BigEndian2Int(substr($string, $i, 2));
			$newcharstring .= self::iconv_fallback_int_utf8($charval);
		}
		return $newcharstring;
	}

/**
	 * UTF-16LE => UTF-8
	 *
	 * @param string $string
	 *
	 * @return string
	 */
	public static function iconv_fallback_utf16le_utf8($string) {
		if (substr($string, 0, 2) == "\xFF\xFE") {
			// strip BOM
			$string = substr($string, 2);
		}
		$newcharstring = '';
		for ($i = 0; $i < strlen($string); $i += 2) {
			$charval = self::LittleEndian2Int(substr($string, $i, 2));
			$newcharstring .= self::iconv_fallback_int_utf8($charval);
		}
		return $newcharstring;
	}

/**
	 * UTF-16BE => ISO-8859-1
	 *
	 * @param string $string
	 *
	 * @return string
	 */
	public static function iconv_fallback_utf16be_iso88591($string) {
		if (substr($string, 0, 2) == "\xFE\xFF") {
			// strip BOM
			$string = substr($string, 2);
		}
		$newcharstring = '';
		for ($i = 0; $i < strlen($string); $i += 2) {
			$charval = self::BigEndian2Int(substr($string, $i, 2));
			$newcharstring .= (($charval < 256) ? chr($charval) : '?');
		}
		return $newcharstring;
	}

/**
	 * UTF-16LE => ISO-8859-1
	 *
	 * @param string $string
	 *
	 * @return string
	 */
	public static function iconv_fallback_utf16le_iso88591($string) {
		if (substr($string, 0, 2) == "\xFF\xFE") {
			// strip BOM
			$string = substr($string, 2);
		}
		$newcharstring = '';
		for ($i = 0; $i < strlen($string); $i += 2) {
			$charval = self::LittleEndian2Int(substr($string, $i, 2));
			$newcharstring .= (($charval < 256) ? chr($charval) : '?');
		}
		return $newcharstring;
	}

/**
	 * UTF-16 (BOM) => ISO-8859-1
	 *
	 * @param string $string
	 *
	 * @return string
	 */
	public static function iconv_fallback_utf16_iso88591($string) {
		$bom = substr($string, 0, 2);
		if ($bom == "\xFE\xFF") {
			return self::iconv_fallback_utf16be_iso88591(substr($string, 2));
		} elseif ($bom == "\xFF\xFE") {
			return self::iconv_fallback_utf16le_iso88591(substr($string, 2));
		}
		return $string;
	}

/**
	 * UTF-16 (BOM) => UTF-8
	 *
	 * @param string $string
	 *
	 * @return string
	 */
	public static function iconv_fallback_utf16_utf8($string) {
		$bom = substr($string, 0, 2);
		if ($bom == "\xFE\xFF") {
			return self::iconv_fallback_utf16be_utf8(substr($string, 2));
		} elseif ($bom == "\xFF\xFE") {
			return self::iconv_fallback_utf16le_utf8(substr($string, 2));
		}
		return $string;
	}

/**
	 * @param string $in_charset
	 * @param string $out_charset
	 * @param string $string
	 *
	 * @return string
	 * @throws Exception
	 */
	public static function iconv_fallback($in_charset, $out_charset, $string) {

if ($in_charset == $out_charset) {
			return $string;
		}

// mb_convert_encoding() available
		if (function_exists('mb_convert_encoding')) {
			if ((strtoupper($in_charset) == 'UTF-16') && (substr($string, 0, 2) != "\xFE\xFF") && (substr($string, 0, 2) != "\xFF\xFE")) {
				// if BOM missing, mb_convert_encoding will mishandle the conversion, assume UTF-16BE and prepend appropriate BOM
				$string = "\xFF\xFE".$string;
			}
			if ((strtoupper($in_charset) == 'UTF-16') && (strtoupper($out_charset) == 'UTF-8')) {
				if (($string == "\xFF\xFE") || ($string == "\xFE\xFF")) {
					// if string consists of only BOM, mb_convert_encoding will return the BOM unmodified
					return '';
				}
			}
			if ($converted_string = @mb_convert_encoding($string, $out_charset, $in_charset)) {
				switch ($out_charset) {
					case 'ISO-8859-1':
						$converted_string = rtrim($converted_string, "\x00");
						break;
				}
				return $converted_string;
			}
			return $string;

// iconv() available
		} elseif (function_exists('iconv')) {
			if ($converted_string = @iconv($in_charset, $out_charset.'//TRANSLIT', $string)) {
				switch ($out_charset) {
					case 'ISO-8859-1':
						$converted_string = rtrim($converted_string, "\x00");
						break;
				}
				return $converted_string;
			}

// iconv() may sometimes fail with "illegal character in input string" error message
			// and return an empty string, but returning the unconverted string is more useful
			return $string;
		}

// neither mb_convert_encoding or iconv() is available
		static $ConversionFunctionList = array();
		if (empty($ConversionFunctionList)) {
			$ConversionFunctionList['ISO-8859-1']['UTF-8']    = 'iconv_fallback_iso88591_utf8';
			$ConversionFunctionList['ISO-8859-1']['UTF-16']   = 'iconv_fallback_iso88591_utf16';
			$ConversionFunctionList['ISO-8859-1']['UTF-16BE'] = 'iconv_fallback_iso88591_utf16be';
			$ConversionFunctionList['ISO-8859-1']['UTF-16LE'] = 'iconv_fallback_iso88591_utf16le';
			$ConversionFunctionList['UTF-8']['ISO-8859-1']    = 'iconv_fallback_utf8_iso88591';
			$ConversionFunctionList['UTF-8']['UTF-16']        = 'iconv_fallback_utf8_utf16';
			$ConversionFunctionList['UTF-8']['UTF-16BE']      = 'iconv_fallback_utf8_utf16be';
			$ConversionFunctionList['UTF-8']['UTF-16LE']      = 'iconv_fallback_utf8_utf16le';
			$ConversionFunctionList['UTF-16']['ISO-8859-1']   = 'iconv_fallback_utf16_iso88591';
			$ConversionFunctionList['UTF-16']['UTF-8']        = 'iconv_fallback_utf16_utf8';
			$ConversionFunctionList['UTF-16LE']['ISO-8859-1'] = 'iconv_fallback_utf16le_iso88591';
			$ConversionFunctionList['UTF-16LE']['UTF-8']      = 'iconv_fallback_utf16le_utf8';
			$ConversionFunctionList['UTF-16BE']['ISO-8859-1'] = 'iconv_fallback_utf16be_iso88591';
			$ConversionFunctionList['UTF-16BE']['UTF-8']      = 'iconv_fallback_utf16be_utf8';
		}
		if (isset($ConversionFunctionList[strtoupper($in_charset)][strtoupper($out_charset)])) {
			$ConversionFunction = $ConversionFunctionList[strtoupper($in_charset)][strtoupper($out_charset)];
			return self::$ConversionFunction($string);
		}
		throw new Exception('PHP does not has mb_convert_encoding() or iconv() support - cannot convert from '.$in_charset.' to '.$out_charset);
	}

/**
	 * @param mixed  $data
	 * @param string $charset
	 *
	 * @return mixed
	 */
	public static function recursiveMultiByteCharString2HTML($data, $charset='ISO-8859-1') {
		if (is_string($data)) {
			return self::MultiByteCharString2HTML($data, $charset);
		} elseif (is_array($data)) {
			$return_data = array();
			foreach ($data as $key => $value) {
				$return_data[$key] = self::recursiveMultiByteCharString2HTML($value, $charset);
			}
			return $return_data;
		}
		// integer, float, objects, resources, etc
		return $data;
	}

/**
	 * @param string|int|float $string
	 * @param string           $charset
	 *
	 * @return string
	 */
	public static function MultiByteCharString2HTML($string, $charset='ISO-8859-1') {
		$string = (string) $string; // in case trying to pass a numeric (float, int) string, would otherwise return an empty string
		$HTMLstring = '';

switch (strtolower($charset)) {
			case '1251':
			case '1252':
			case '866':
			case '932':
			case '936':
			case '950':
			case 'big5':
			case 'big5-hkscs':
			case 'cp1251':
			case 'cp1252':
			case 'cp866':
			case 'euc-jp':
			case 'eucjp':
			case 'gb2312':
			case 'ibm866':
			case 'iso-8859-1':
			case 'iso-8859-15':
			case 'iso8859-1':
			case 'iso8859-15':
			case 'koi8-r':
			case 'koi8-ru':
			case 'koi8r':
			case 'shift_jis':
			case 'sjis':
			case 'win-1251':
			case 'windows-1251':
			case 'windows-1252':
				$HTMLstring = htmlentities($string, ENT_COMPAT, $charset);
				break;

case 'utf-8':
				$strlen = strlen($string);
				for ($i = 0; $i < $strlen; $i++) {
					$char_ord_val = ord($string[$i]);
					$charval = 0;
					if ($char_ord_val < 0x80) {
						$charval = $char_ord_val;
					} elseif ((($char_ord_val & 0xF0) >> 4) == 0x0F  &&  $i+3 < $strlen) {
						$charval  = (($char_ord_val & 0x07) << 18);
						$charval += ((ord($string[++$i]) & 0x3F) << 12);
						$charval += ((ord($string[++$i]) & 0x3F) << 6);
						$charval +=  (ord($string[++$i]) & 0x3F);
					} elseif ((($char_ord_val & 0xE0) >> 5) == 0x07  &&  $i+2 < $strlen) {
						$charval  = (($char_ord_val & 0x0F) << 12);
						$charval += ((ord($string[++$i]) & 0x3F) << 6);
						$charval +=  (ord($string[++$i]) & 0x3F);
					} elseif ((($char_ord_val & 0xC0) >> 6) == 0x03  &&  $i+1 < $strlen) {
						$charval  = (($char_ord_val & 0x1F) << 6);
						$charval += (ord($string[++$i]) & 0x3F);
					}
					if (($charval >= 32) && ($charval <= 127)) {
						$HTMLstring .= htmlentities(chr($charval));
					} else {
						$HTMLstring .= '&#'.$charval.';';
					}
				}
				break;

case 'utf-16le':
				for ($i = 0; $i < strlen($string); $i += 2) {
					$charval = self::LittleEndian2Int(substr($string, $i, 2));
					if (($charval >= 32) && ($charval <= 127)) {
						$HTMLstring .= chr($charval);
					} else {
						$HTMLstring .= '&#'.$charval.';';
					}
				}
				break;

case 'utf-16be':
				for ($i = 0; $i < strlen($string); $i += 2) {
					$charval = self::BigEndian2Int(substr($string, $i, 2));
					if (($charval >= 32) && ($charval <= 127)) {
						$HTMLstring .= chr($charval);
					} else {
						$HTMLstring .= '&#'.$charval.';';
					}
				}
				break;

default:
				$HTMLstring = 'ERROR: Character set "'.$charset.'" not supported in MultiByteCharString2HTML()';
				break;
		}
		return $HTMLstring;
	}

/**
	 * @param int $namecode
	 *
	 * @return string
	 */
	public static function RGADnameLookup($namecode) {
		static $RGADname = array();
		if (empty($RGADname)) {
			$RGADname[0] = 'not set';
			$RGADname[1] = 'Track Gain Adjustment';
			$RGADname[2] = 'Album Gain Adjustment';
		}

return (isset($RGADname[$namecode]) ? $RGADname[$namecode] : '');
	}

/**
	 * @param int $originatorcode
	 *
	 * @return string
	 */
	public static function RGADoriginatorLookup($originatorcode) {
		static $RGADoriginator = array();
		if (empty($RGADoriginator)) {
			$RGADoriginator[0] = 'unspecified';
			$RGADoriginator[1] = 'pre-set by artist/producer/mastering engineer';
			$RGADoriginator[2] = 'set by user';
			$RGADoriginator[3] = 'determined automatically';
		}

return (isset($RGADoriginator[$originatorcode]) ? $RGADoriginator[$originatorcode] : '');
	}

/**
	 * @param int $rawadjustment
	 * @param int $signbit
	 *
	 * @return float
	 */
	public static function RGADadjustmentLookup($rawadjustment, $signbit) {
		$adjustment = (float) $rawadjustment / 10;
		if ($signbit == 1) {
			$adjustment *= -1;
		}
		return $adjustment;
	}

/**
	 * @param int $namecode
	 * @param int $originatorcode
	 * @param int $replaygain
	 *
	 * @return string
	 */
	public static function RGADgainString($namecode, $originatorcode, $replaygain) {
		if ($replaygain < 0) {
			$signbit = '1';
		} else {
			$signbit = '0';
		}
		$storedreplaygain = intval(round($replaygain * 10));
		$gainstring  = str_pad(decbin($namecode), 3, '0', STR_PAD_LEFT);
		$gainstring .= str_pad(decbin($originatorcode), 3, '0', STR_PAD_LEFT);
		$gainstring .= $signbit;
		$gainstring .= str_pad(decbin($storedreplaygain), 9, '0', STR_PAD_LEFT);

return $gainstring;
	}

/**
	 * @param float $amplitude
	 *
	 * @return float
	 */
	public static function RGADamplitude2dB($amplitude) {
		return 20 * log10($amplitude);
	}

/**
	 * @param string $imgData
	 * @param array  $imageinfo
	 *
	 * @return array|false
	 */
	public static function GetDataImageSize($imgData, &$imageinfo=array()) {
		if (PHP_VERSION_ID >= 50400) {
			$GetDataImageSize = @getimagesizefromstring($imgData, $imageinfo);
			if ($GetDataImageSize === false) {
				return false;
			}
			$GetDataImageSize['height'] = $GetDataImageSize[0];
			$GetDataImageSize['width'] = $GetDataImageSize[1];
			return $GetDataImageSize;
		}
		static $tempdir = '';
		if (empty($tempdir)) {
			if (function_exists('sys_get_temp_dir')) {
				$tempdir = sys_get_temp_dir(); // https://github.com/JamesHeinrich/getID3/issues/52
			}

// yes this is ugly, feel free to suggest a better way
			if (include_once(dirname(__FILE__).'/getid3.php')) {
				$getid3_temp = new getID3();
				if ($getid3_temp_tempdir = $getid3_temp->tempdir) {
					$tempdir = $getid3_temp_tempdir;
				}
				unset($getid3_temp, $getid3_temp_tempdir);
			}
		}
		$GetDataImageSize = false;
		if ($tempfilename = tempnam($tempdir, 'gI3')) {
			if (is_writable($tempfilename) && is_file($tempfilename) && ($tmp = fopen($tempfilename, 'wb'))) {
				fwrite($tmp, $imgData);
				fclose($tmp);
				$GetDataImageSize = @getimagesize($tempfilename, $imageinfo);
				if ($GetDataImageSize === false) {
					return false;
				}
				$GetDataImageSize['height'] = $GetDataImageSize[0];
				$GetDataImageSize['width']  = $GetDataImageSize[1];
			}
			unlink($tempfilename);
		}
		return $GetDataImageSize;
	}

/**
	 * @param string $mime_type
	 *
	 * @return string
	 */
	public static function ImageExtFromMime($mime_type) {
		// temporary way, works OK for now, but should be reworked in the future
		return str_replace(array('image/', 'x-', 'jpeg'), array('', '', 'jpg'), $mime_type);
	}

/**
	 * @param array $ThisFileInfo
	 * @param bool  $option_tags_html default true (just as in the main getID3 class)
	 *
	 * @return bool
	 */
	public static function CopyTagsToComments(&$ThisFileInfo, $option_tags_html=true) {
		// Copy all entries from ['tags'] into common ['comments']
		if (!empty($ThisFileInfo['tags'])) {

// Some tag types can only support limited character sets and may contain data in non-standard encoding (usually ID3v1)
			// and/or poorly-transliterated tag values that are also in tag formats that do support full-range character sets
			// To make the output more user-friendly, process the potentially-problematic tag formats last to enhance the chance that
			// the first entries in [comments] are the most correct and the "bad" ones (if any) come later.
			// https://github.com/JamesHeinrich/getID3/issues/338
			$processLastTagTypes = array('id3v1','riff');
			foreach ($processLastTagTypes as $processLastTagType) {
				if (isset($ThisFileInfo['tags'][$processLastTagType])) {
					// bubble ID3v1 to the end, if present to aid in detecting bad ID3v1 encodings
					$temp = $ThisFileInfo['tags'][$processLastTagType];
					unset($ThisFileInfo['tags'][$processLastTagType]);
					$ThisFileInfo['tags'][$processLastTagType] = $temp;
					unset($temp);
				}
			}
			foreach ($ThisFileInfo['tags'] as $tagtype => $tagarray) {
				foreach ($tagarray as $tagname => $tagdata) {
					foreach ($tagdata as $key => $value) {
						if (!empty($value)) {
							if (empty($ThisFileInfo['comments'][$tagname])) {

// fall through and append value

} elseif ($tagtype == 'id3v1') {

$newvaluelength = strlen(trim($value));
								foreach ($ThisFileInfo['comments'][$tagname] as $existingkey => $existingvalue) {
									$oldvaluelength = strlen(trim($existingvalue));
									if (($newvaluelength <= $oldvaluelength) && (substr($existingvalue, 0, $newvaluelength) == trim($value))) {
										// new value is identical but shorter-than (or equal-length to) one already in comments - skip
										break 2;
									}

if (function_exists('mb_convert_encoding')) {
										if (trim($value) == trim(substr(mb_convert_encoding($existingvalue, $ThisFileInfo['id3v1']['encoding'], $ThisFileInfo['encoding']), 0, 30))) {
											// value stored in ID3v1 appears to be probably the multibyte value transliterated (badly) into ISO-8859-1 in ID3v1.
											// As an example, Foobar2000 will do this if you tag a file with Chinese or Arabic or Cyrillic or something that doesn't fit into ISO-8859-1 the ID3v1 will consist of mostly "?" characters, one per multibyte unrepresentable character
											break 2;
										}
									}
								}

} elseif (!is_array($value)) {

$newvaluelength   =    strlen(trim($value));
								$newvaluelengthMB = mb_strlen(trim($value));
								foreach ($ThisFileInfo['comments'][$tagname] as $existingkey => $existingvalue) {
									$oldvaluelength   =    strlen(trim($existingvalue));
									$oldvaluelengthMB = mb_strlen(trim($existingvalue));
									if (($newvaluelengthMB == $oldvaluelengthMB) && ($existingvalue == getid3_lib::iconv_fallback('UTF-8', 'ASCII', $value))) {
										// https://github.com/JamesHeinrich/getID3/issues/338
										// check for tags containing extended characters that may have been forced into limited-character storage (e.g. UTF8 values into ASCII)
										// which will usually display unrepresentable characters as "?"
										$ThisFileInfo['comments'][$tagname][$existingkey] = trim($value);
										break;
									}
									if ((strlen($existingvalue) > 10) && ($newvaluelength > $oldvaluelength) && (substr(trim($value), 0, strlen($existingvalue)) == $existingvalue)) {
										$ThisFileInfo['comments'][$tagname][$existingkey] = trim($value);
										break;
									}
								}

}
							if (is_array($value) || empty($ThisFileInfo['comments'][$tagname]) || !in_array(trim($value), $ThisFileInfo['comments'][$tagname])) {
								$value = (is_string($value) ? trim($value) : $value);
								if (!is_int($key) && !ctype_digit($key)) {
									$ThisFileInfo['comments'][$tagname][$key] = $value;
								} else {
									if (!isset($ThisFileInfo['comments'][$tagname])) {
										$ThisFileInfo['comments'][$tagname] = array($value);
									} else {
										$ThisFileInfo['comments'][$tagname][] = $value;
									}
								}
							}
						}
					}
				}
			}

// attempt to standardize spelling of returned keys
			if (!empty($ThisFileInfo['comments'])) {
				$StandardizeFieldNames = array(
					'tracknumber' => 'track_number',
					'track'       => 'track_number',
				);
				foreach ($StandardizeFieldNames as $badkey => $goodkey) {
					if (array_key_exists($badkey, $ThisFileInfo['comments']) && !array_key_exists($goodkey, $ThisFileInfo['comments'])) {
						$ThisFileInfo['comments'][$goodkey] = $ThisFileInfo['comments'][$badkey];
						unset($ThisFileInfo['comments'][$badkey]);
					}
				}
			}

if ($option_tags_html) {
				// Copy ['comments'] to ['comments_html']
				if (!empty($ThisFileInfo['comments'])) {
					foreach ($ThisFileInfo['comments'] as $field => $values) {
						if ($field == 'picture') {
							// pictures can take up a lot of space, and we don't need multiple copies of them
							// let there be a single copy in [comments][picture], and not elsewhere
							continue;
						}
						foreach ($values as $index => $value) {
							if (is_array($value)) {
								$ThisFileInfo['comments_html'][$field][$index] = $value;
							} else {
								$ThisFileInfo['comments_html'][$field][$index] = str_replace('&#0;', '', self::MultiByteCharString2HTML($value, $ThisFileInfo['encoding']));
							}
						}
					}
				}
			}

}
		return true;
	}

/**
	 * @param string $key
	 * @param int    $begin
	 * @param int    $end
	 * @param string $file
	 * @param string $name
	 *
	 * @return string
	 */
	public static function EmbeddedLookup($key, $begin, $end, $file, $name) {

// Cached
		static $cache;
		if (isset($cache[$file][$name])) {
			return (isset($cache[$file][$name][$key]) ? $cache[$file][$name][$key] : '');
		}

// Init
		$keylength  = strlen($key);
		$line_count = $end - $begin - 7;

// Open php file
		$fp = fopen($file, 'r');

// Discard $begin lines
		for ($i = 0; $i < ($begin + 3); $i++) {
			fgets($fp, 1024);
		}

// Loop thru line
		while (0 < $line_count--) {

// Read line
			$line = ltrim(fgets($fp, 1024), "\t ");

// METHOD A: only cache the matching key - less memory but slower on next lookup of not-previously-looked-up key
			//$keycheck = substr($line, 0, $keylength);
			//if ($key == $keycheck)  {
			//	$cache[$file][$name][$keycheck] = substr($line, $keylength + 1);
			//	break;
			//}

// METHOD B: cache all keys in this lookup - more memory but faster on next lookup of not-previously-looked-up key
			//$cache[$file][$name][substr($line, 0, $keylength)] = trim(substr($line, $keylength + 1));
			$explodedLine = explode("\t", $line, 2);
			$ThisKey   = $explodedLine[0];
			$ThisValue = (isset($explodedLine[1]) ? $explodedLine[1] : '');
			$cache[$file][$name][$ThisKey] = trim($ThisValue);
		}

// Close and return
		fclose($fp);
		return (isset($cache[$file][$name][$key]) ? $cache[$file][$name][$key] : '');
	}

/**
	 * @param string $filename
	 * @param string $sourcefile
	 * @param bool   $DieOnFailure
	 *
	 * @return bool
	 * @throws Exception
	 */
	public static function IncludeDependency($filename, $sourcefile, $DieOnFailure=false) {
		global $GETID3_ERRORARRAY;

if (file_exists($filename)) {
			if (include_once($filename)) {
				return true;
			} else {
				$diemessage = basename($sourcefile).' depends on '.$filename.', which has errors';
			}
		} else {
			$diemessage = basename($sourcefile).' depends on '.$filename.', which is missing';
		}
		if ($DieOnFailure) {
			throw new Exception($diemessage);
		} else {
			$GETID3_ERRORARRAY[] = $diemessage;
		}
		return false;
	}

/**
	 * @param string $string
	 *
	 * @return string
	 */
	public static function trimNullByte($string) {
		return trim($string, "\x00");
	}

/**
	 * @param string $path
	 *
	 * @return float|bool
	 */
	public static function getFileSizeSyscall($path) {
		$commandline = null;
		$filesize = false;

if (GETID3_OS_ISWINDOWS) {
			if (class_exists('COM')) { // From PHP 5.3.15 and 5.4.5, COM and DOTNET is no longer built into the php core.you have to add COM support in php.ini:
				$filesystem = new COM('Scripting.FileSystemObject');
				$file = $filesystem->GetFile($path);
				$filesize = $file->Size();
				unset($filesystem, $file);
			} else {
				$commandline = 'for %I in ('.escapeshellarg($path).') do @echo %~zI';
			}
		} else {
			$commandline = 'ls -l '.escapeshellarg($path).' | awk \'{print $5}\'';
		}
		if (isset($commandline)) {
			$output = trim(shell_exec($commandline));
			if (ctype_digit($output)) {
				$filesize = (float) $output;
			}
		}
		return $filesize;
	}

/**
	 * @param string $filename
	 *
	 * @return string|false
	 */
	public static function truepath($filename) {
		// 2017-11-08: this could use some improvement, patches welcome
		if (preg_match('#^(\\\\\\\\|//)[a-z0-9]#i', $filename, $matches)) {
			// PHP's built-in realpath function does not work on UNC Windows shares
			$goodpath = array();
			foreach (explode('/', str_replace('\\', '/', $filename)) as $part) {
				if ($part == '.') {
					continue;
				}
				if ($part == '..') {
					if (count($goodpath)) {
						array_pop($goodpath);
					} else {
						// cannot step above this level, already at top level
						return false;
					}
				} else {
					$goodpath[] = $part;
				}
			}
			return implode(DIRECTORY_SEPARATOR, $goodpath);
		}
		return realpath($filename);
	}

/**
	 * Workaround for Bug #37268 (https://bugs.php.net/bug.php?id=37268)
	 *
	 * @param string $path A path.
	 * @param string $suffix If the name component ends in suffix this will also be cut off.
	 *
	 * @return string
	 */
	public static function mb_basename($path, $suffix = '') {
		$splited = preg_split('#/#', rtrim($path, '/ '));
		return substr(basename('X'.$splited[count($splited) - 1], $suffix), 1);
	}

/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org>               //
//  available at https://github.com/JamesHeinrich/getID3       //
//            or https://www.getid3.org                        //
//            or http://getid3.sourceforge.net                 //
//  see readme.txt for more details                            //
/////////////////////////////////////////////////////////////////
//                                                             //
// module.audio.ac3.php                                        //
// module for analyzing AC-3 (aka Dolby Digital) audio files   //
// dependencies: NONE                                          //
//                                                            ///
/////////////////////////////////////////////////////////////////

if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
	exit;
}

class getid3_ac3 extends getid3_handler
{
	/**
	 * @var array
	 */
	private $AC3header = array();

/**
	 * @var int
	 */
	private $BSIoffset = 0;

const syncword = 0x0B77;

/**
	 * @return bool
	 */
	public function Analyze() {
		$info = &$this->getid3->info;

///AH
		$info['ac3']['raw']['bsi'] = array();
		$thisfile_ac3              = &$info['ac3'];
		$thisfile_ac3_raw          = &$thisfile_ac3['raw'];
		$thisfile_ac3_raw_bsi      = &$thisfile_ac3_raw['bsi'];

// http://www.atsc.org/standards/a_52a.pdf

$info['fileformat'] = 'ac3';

// An AC-3 serial coded audio bit stream is made up of a sequence of synchronization frames
		// Each synchronization frame contains 6 coded audio blocks (AB), each of which represent 256
		// new audio samples per channel. A synchronization information (SI) header at the beginning
		// of each frame contains information needed to acquire and maintain synchronization. A
		// bit stream information (BSI) header follows SI, and contains parameters describing the coded
		// audio service. The coded audio blocks may be followed by an auxiliary data (Aux) field. At the
		// end of each frame is an error check field that includes a CRC word for error detection. An
		// additional CRC word is located in the SI header, the use of which, by a decoder, is optional.
		//
		// syncinfo() | bsi() | AB0 | AB1 | AB2 | AB3 | AB4 | AB5 | Aux | CRC

// syncinfo() {
		// 	 syncword    16
		// 	 crc1        16
		// 	 fscod        2
		// 	 frmsizecod   6
		// } /* end of syncinfo */

$this->fseek($info['avdataoffset']);
		$tempAC3header = $this->fread(100); // should be enough to cover all data, there are some variable-length fields...?
		$this->AC3header['syncinfo']  =     getid3_lib::BigEndian2Int(substr($tempAC3header, 0, 2));
		$this->AC3header['bsi']       =     getid3_lib::BigEndian2Bin(substr($tempAC3header, 2));
		$thisfile_ac3_raw_bsi['bsid'] = (getid3_lib::LittleEndian2Int(substr($tempAC3header, 5, 1)) & 0xF8) >> 3; // AC3 and E-AC3 put the "bsid" version identifier in the same place, but unfortnately the 4 bytes between the syncword and the version identifier are interpreted differently, so grab it here so the following code structure can make sense
		unset($tempAC3header);

if ($this->AC3header['syncinfo'] !== self::syncword) {
			if (!$this->isDependencyFor('matroska')) {
				unset($info['fileformat'], $info['ac3']);
				return $this->error('Expecting "'.dechex(self::syncword).'" at offset '.$info['avdataoffset'].', found "'.dechex($this->AC3header['syncinfo']).'"');
			}
		}

$info['audio']['dataformat']   = 'ac3';
		$info['audio']['bitrate_mode'] = 'cbr';
		$info['audio']['lossless']     = false;

if ($thisfile_ac3_raw_bsi['bsid'] <= 8) {

$thisfile_ac3_raw_bsi['crc1']       = getid3_lib::Bin2Dec($this->readHeaderBSI(16));
			$thisfile_ac3_raw_bsi['fscod']      =                     $this->readHeaderBSI(2);   // 5.4.1.3
			$thisfile_ac3_raw_bsi['frmsizecod'] =                     $this->readHeaderBSI(6);   // 5.4.1.4
			if ($thisfile_ac3_raw_bsi['frmsizecod'] > 37) { // binary: 100101 - see Table 5.18 Frame Size Code Table (1 word = 16 bits)
				$this->warning('Unexpected ac3.bsi.frmsizecod value: '.$thisfile_ac3_raw_bsi['frmsizecod'].', bitrate not set correctly');
			}

$thisfile_ac3_raw_bsi['bsid']  = $this->readHeaderBSI(5); // we already know this from pre-parsing the version identifier, but re-read it to let the bitstream flow as intended
			$thisfile_ac3_raw_bsi['bsmod'] = $this->readHeaderBSI(3);
			$thisfile_ac3_raw_bsi['acmod'] = $this->readHeaderBSI(3);

if ($thisfile_ac3_raw_bsi['acmod'] & 0x01) {
				// If the lsb of acmod is a 1, center channel is in use and cmixlev follows in the bit stream.
				$thisfile_ac3_raw_bsi['cmixlev'] = $this->readHeaderBSI(2);
				$thisfile_ac3['center_mix_level'] = self::centerMixLevelLookup($thisfile_ac3_raw_bsi['cmixlev']);
			}

if ($thisfile_ac3_raw_bsi['acmod'] & 0x04) {
				// If the msb of acmod is a 1, surround channels are in use and surmixlev follows in the bit stream.
				$thisfile_ac3_raw_bsi['surmixlev'] = $this->readHeaderBSI(2);
				$thisfile_ac3['surround_mix_level'] = self::surroundMixLevelLookup($thisfile_ac3_raw_bsi['surmixlev']);
			}

if ($thisfile_ac3_raw_bsi['acmod'] == 0x02) {
				// When operating in the two channel mode, this 2-bit code indicates whether or not the program has been encoded in Dolby Surround.
				$thisfile_ac3_raw_bsi['dsurmod'] = $this->readHeaderBSI(2);
				$thisfile_ac3['dolby_surround_mode'] = self::dolbySurroundModeLookup($thisfile_ac3_raw_bsi['dsurmod']);
			}

$thisfile_ac3_raw_bsi['flags']['lfeon'] = (bool) $this->readHeaderBSI(1);

// This indicates how far the average dialogue level is below digital 100 percent. Valid values are 1-31.
			// The value of 0 is reserved. The values of 1 to 31 are interpreted as -1 dB to -31 dB with respect to digital 100 percent.
			$thisfile_ac3_raw_bsi['dialnorm'] = $this->readHeaderBSI(5);                 // 5.4.2.8 dialnorm: Dialogue Normalization, 5 Bits

$thisfile_ac3_raw_bsi['flags']['compr'] = (bool) $this->readHeaderBSI(1);       // 5.4.2.9 compre: Compression Gain Word Exists, 1 Bit
			if ($thisfile_ac3_raw_bsi['flags']['compr']) {
				$thisfile_ac3_raw_bsi['compr'] = $this->readHeaderBSI(8);                // 5.4.2.10 compr: Compression Gain Word, 8 Bits
				$thisfile_ac3['heavy_compression'] = self::heavyCompression($thisfile_ac3_raw_bsi['compr']);
			}

$thisfile_ac3_raw_bsi['flags']['langcod'] = (bool) $this->readHeaderBSI(1);     // 5.4.2.11 langcode: Language Code Exists, 1 Bit
			if ($thisfile_ac3_raw_bsi['flags']['langcod']) {
				$thisfile_ac3_raw_bsi['langcod'] = $this->readHeaderBSI(8);              // 5.4.2.12 langcod: Language Code, 8 Bits
			}

$thisfile_ac3_raw_bsi['flags']['audprodinfo'] = (bool) $this->readHeaderBSI(1);  // 5.4.2.13 audprodie: Audio Production Information Exists, 1 Bit
			if ($thisfile_ac3_raw_bsi['flags']['audprodinfo']) {
				$thisfile_ac3_raw_bsi['mixlevel'] = $this->readHeaderBSI(5);             // 5.4.2.14 mixlevel: Mixing Level, 5 Bits
				$thisfile_ac3_raw_bsi['roomtyp']  = $this->readHeaderBSI(2);             // 5.4.2.15 roomtyp: Room Type, 2 Bits

$thisfile_ac3['mixing_level'] = (80 + $thisfile_ac3_raw_bsi['mixlevel']).'dB';
				$thisfile_ac3['room_type']    = self::roomTypeLookup($thisfile_ac3_raw_bsi['roomtyp']);
			}

$thisfile_ac3_raw_bsi['dialnorm2'] = $this->readHeaderBSI(5);                // 5.4.2.16 dialnorm2: Dialogue Normalization, ch2, 5 Bits
			$thisfile_ac3['dialogue_normalization2'] = '-'.$thisfile_ac3_raw_bsi['dialnorm2'].'dB';  // This indicates how far the average dialogue level is below digital 100 percent. Valid values are 1-31. The value of 0 is reserved. The values of 1 to 31 are interpreted as -1 dB to -31 dB with respect to digital 100 percent.

$thisfile_ac3_raw_bsi['flags']['compr2'] = (bool) $this->readHeaderBSI(1);       // 5.4.2.17 compr2e: Compression Gain Word Exists, ch2, 1 Bit
			if ($thisfile_ac3_raw_bsi['flags']['compr2']) {
				$thisfile_ac3_raw_bsi['compr2'] = $this->readHeaderBSI(8);               // 5.4.2.18 compr2: Compression Gain Word, ch2, 8 Bits
				$thisfile_ac3['heavy_compression2'] = self::heavyCompression($thisfile_ac3_raw_bsi['compr2']);
			}

$thisfile_ac3_raw_bsi['flags']['langcod2'] = (bool) $this->readHeaderBSI(1);    // 5.4.2.19 langcod2e: Language Code Exists, ch2, 1 Bit
			if ($thisfile_ac3_raw_bsi['flags']['langcod2']) {
				$thisfile_ac3_raw_bsi['langcod2'] = $this->readHeaderBSI(8);             // 5.4.2.20 langcod2: Language Code, ch2, 8 Bits
			}

$thisfile_ac3_raw_bsi['flags']['audprodinfo2'] = (bool) $this->readHeaderBSI(1); // 5.4.2.21 audprodi2e: Audio Production Information Exists, ch2, 1 Bit
			if ($thisfile_ac3_raw_bsi['flags']['audprodinfo2']) {
				$thisfile_ac3_raw_bsi['mixlevel2'] = $this->readHeaderBSI(5);            // 5.4.2.22 mixlevel2: Mixing Level, ch2, 5 Bits
				$thisfile_ac3_raw_bsi['roomtyp2']  = $this->readHeaderBSI(2);            // 5.4.2.23 roomtyp2: Room Type, ch2, 2 Bits

$thisfile_ac3['mixing_level2'] = (80 + $thisfile_ac3_raw_bsi['mixlevel2']).'dB';
				$thisfile_ac3['room_type2']    = self::roomTypeLookup($thisfile_ac3_raw_bsi['roomtyp2']);
			}

$thisfile_ac3_raw_bsi['copyright'] = (bool) $this->readHeaderBSI(1);         // 5.4.2.24 copyrightb: Copyright Bit, 1 Bit

$thisfile_ac3_raw_bsi['original']  = (bool) $this->readHeaderBSI(1);         // 5.4.2.25 origbs: Original Bit Stream, 1 Bit

$thisfile_ac3_raw_bsi['flags']['timecod1'] = $this->readHeaderBSI(2);            // 5.4.2.26 timecod1e, timcode2e: Time Code (first and second) Halves Exist, 2 Bits
			if ($thisfile_ac3_raw_bsi['flags']['timecod1'] & 0x01) {
				$thisfile_ac3_raw_bsi['timecod1'] = $this->readHeaderBSI(14);            // 5.4.2.27 timecod1: Time code first half, 14 bits
				$thisfile_ac3['timecode1'] = 0;
				$thisfile_ac3['timecode1'] += (($thisfile_ac3_raw_bsi['timecod1'] & 0x3E00) >>  9) * 3600;  // The first 5 bits of this 14-bit field represent the time in hours, with valid values of 0�23
				$thisfile_ac3['timecode1'] += (($thisfile_ac3_raw_bsi['timecod1'] & 0x01F8) >>  3) *   60;  // The next 6 bits represent the time in minutes, with valid values of 0�59
				$thisfile_ac3['timecode1'] += (($thisfile_ac3_raw_bsi['timecod1'] & 0x0003) >>  0) *    8;  // The final 3 bits represents the time in 8 second increments, with valid values of 0�7 (representing 0, 8, 16, ... 56 seconds)
			}
			if ($thisfile_ac3_raw_bsi['flags']['timecod1'] & 0x02) {
				$thisfile_ac3_raw_bsi['timecod2'] = $this->readHeaderBSI(14);            // 5.4.2.28 timecod2: Time code second half, 14 bits
				$thisfile_ac3['timecode2'] = 0;
				$thisfile_ac3['timecode2'] += (($thisfile_ac3_raw_bsi['timecod2'] & 0x3800) >> 11) *   1;              // The first 3 bits of this 14-bit field represent the time in seconds, with valid values from 0�7 (representing 0-7 seconds)
				$thisfile_ac3['timecode2'] += (($thisfile_ac3_raw_bsi['timecod2'] & 0x07C0) >>  6) *  (1 / 30);        // The next 5 bits represents the time in frames, with valid values from 0�29 (one frame = 1/30th of a second)
				$thisfile_ac3['timecode2'] += (($thisfile_ac3_raw_bsi['timecod2'] & 0x003F) >>  0) * ((1 / 30) / 60);  // The final 6 bits represents fractions of 1/64 of a frame, with valid values from 0�63
			}

$thisfile_ac3_raw_bsi['flags']['addbsi'] = (bool) $this->readHeaderBSI(1);
			if ($thisfile_ac3_raw_bsi['flags']['addbsi']) {
				$thisfile_ac3_raw_bsi['addbsi_length'] = $this->readHeaderBSI(6) + 1; // This 6-bit code, which exists only if addbside is a 1, indicates the length in bytes of additional bit stream information. The valid range of addbsil is 0�63, indicating 1�64 additional bytes, respectively.

$this->AC3header['bsi'] .= getid3_lib::BigEndian2Bin($this->fread($thisfile_ac3_raw_bsi['addbsi_length']));

$thisfile_ac3_raw_bsi['addbsi_data'] = substr($this->AC3header['bsi'], $this->BSIoffset, $thisfile_ac3_raw_bsi['addbsi_length'] * 8);
				$this->BSIoffset += $thisfile_ac3_raw_bsi['addbsi_length'] * 8;
			}

} elseif ($thisfile_ac3_raw_bsi['bsid'] <= 16) { // E-AC3

$this->error('E-AC3 parsing is incomplete and experimental in this version of getID3 ('.$this->getid3->version().'). Notably the bitrate calculations are wrong -- value might (or not) be correct, but it is not calculated correctly. Email info@getid3.org if you know how to calculate EAC3 bitrate correctly.');
			$info['audio']['dataformat'] = 'eac3';

$thisfile_ac3_raw_bsi['strmtyp']          =        $this->readHeaderBSI(2);
			$thisfile_ac3_raw_bsi['substreamid']      =        $this->readHeaderBSI(3);
			$thisfile_ac3_raw_bsi['frmsiz']           =        $this->readHeaderBSI(11);
			$thisfile_ac3_raw_bsi['fscod']            =        $this->readHeaderBSI(2);
			if ($thisfile_ac3_raw_bsi['fscod'] == 3) {
				$thisfile_ac3_raw_bsi['fscod2']       =        $this->readHeaderBSI(2);
				$thisfile_ac3_raw_bsi['numblkscod'] = 3; // six blocks per syncframe
			} else {
				$thisfile_ac3_raw_bsi['numblkscod']   =        $this->readHeaderBSI(2);
			}
			$thisfile_ac3['bsi']['blocks_per_sync_frame'] = self::blocksPerSyncFrame($thisfile_ac3_raw_bsi['numblkscod']);
			$thisfile_ac3_raw_bsi['acmod']            =        $this->readHeaderBSI(3);
			$thisfile_ac3_raw_bsi['flags']['lfeon']   = (bool) $this->readHeaderBSI(1);
			$thisfile_ac3_raw_bsi['bsid']             =        $this->readHeaderBSI(5); // we already know this from pre-parsing the version identifier, but re-read it to let the bitstream flow as intended
			$thisfile_ac3_raw_bsi['dialnorm']         =        $this->readHeaderBSI(5);
			$thisfile_ac3_raw_bsi['flags']['compr']       = (bool) $this->readHeaderBSI(1);
			if ($thisfile_ac3_raw_bsi['flags']['compr']) {
				$thisfile_ac3_raw_bsi['compr']        =        $this->readHeaderBSI(8);
			}
			if ($thisfile_ac3_raw_bsi['acmod'] == 0) { // if 1+1 mode (dual mono, so some items need a second value)
				$thisfile_ac3_raw_bsi['dialnorm2']    =        $this->readHeaderBSI(5);
				$thisfile_ac3_raw_bsi['flags']['compr2']  = (bool) $this->readHeaderBSI(1);
				if ($thisfile_ac3_raw_bsi['flags']['compr2']) {
					$thisfile_ac3_raw_bsi['compr2']   =        $this->readHeaderBSI(8);
				}
			}
			if ($thisfile_ac3_raw_bsi['strmtyp'] == 1) { // if dependent stream
				$thisfile_ac3_raw_bsi['flags']['chanmap'] = (bool) $this->readHeaderBSI(1);
				if ($thisfile_ac3_raw_bsi['flags']['chanmap']) {
					$thisfile_ac3_raw_bsi['chanmap']  =        $this->readHeaderBSI(8);
				}
			}
			$thisfile_ac3_raw_bsi['flags']['mixmdat']     = (bool) $this->readHeaderBSI(1);
			if ($thisfile_ac3_raw_bsi['flags']['mixmdat']) { // Mixing metadata
				if ($thisfile_ac3_raw_bsi['acmod'] > 2) { // if more than 2 channels
					$thisfile_ac3_raw_bsi['dmixmod']  =        $this->readHeaderBSI(2);
				}
				if (($thisfile_ac3_raw_bsi['acmod'] & 0x01) && ($thisfile_ac3_raw_bsi['acmod'] > 2)) { // if three front channels exist
					$thisfile_ac3_raw_bsi['ltrtcmixlev'] =        $this->readHeaderBSI(3);
					$thisfile_ac3_raw_bsi['lorocmixlev'] =        $this->readHeaderBSI(3);
				}
				if ($thisfile_ac3_raw_bsi['acmod'] & 0x04) { // if a surround channel exists
					$thisfile_ac3_raw_bsi['ltrtsurmixlev'] =        $this->readHeaderBSI(3);
					$thisfile_ac3_raw_bsi['lorosurmixlev'] =        $this->readHeaderBSI(3);
				}
				if ($thisfile_ac3_raw_bsi['flags']['lfeon']) { // if the LFE channel exists
					$thisfile_ac3_raw_bsi['flags']['lfemixlevcod'] = (bool) $this->readHeaderBSI(1);
					if ($thisfile_ac3_raw_bsi['flags']['lfemixlevcod']) {
						$thisfile_ac3_raw_bsi['lfemixlevcod']  =        $this->readHeaderBSI(5);
					}
				}
				if ($thisfile_ac3_raw_bsi['strmtyp'] == 0) { // if independent stream
					$thisfile_ac3_raw_bsi['flags']['pgmscl'] = (bool) $this->readHeaderBSI(1);
					if ($thisfile_ac3_raw_bsi['flags']['pgmscl']) {
						$thisfile_ac3_raw_bsi['pgmscl']  =        $this->readHeaderBSI(6);
					}
					if ($thisfile_ac3_raw_bsi['acmod'] == 0) { // if 1+1 mode (dual mono, so some items need a second value)
						$thisfile_ac3_raw_bsi['flags']['pgmscl2'] = (bool) $this->readHeaderBSI(1);
						if ($thisfile_ac3_raw_bsi['flags']['pgmscl2']) {
							$thisfile_ac3_raw_bsi['pgmscl2']  =        $this->readHeaderBSI(6);
						}
					}
					$thisfile_ac3_raw_bsi['flags']['extpgmscl'] = (bool) $this->readHeaderBSI(1);
					if ($thisfile_ac3_raw_bsi['flags']['extpgmscl']) {
						$thisfile_ac3_raw_bsi['extpgmscl']  =        $this->readHeaderBSI(6);
					}
					$thisfile_ac3_raw_bsi['mixdef']  =        $this->readHeaderBSI(2);
					if ($thisfile_ac3_raw_bsi['mixdef'] == 1) { // mixing option 2
						$thisfile_ac3_raw_bsi['premixcmpsel']  = (bool) $this->readHeaderBSI(1);
						$thisfile_ac3_raw_bsi['drcsrc']        = (bool) $this->readHeaderBSI(1);
						$thisfile_ac3_raw_bsi['premixcmpscl']  =        $this->readHeaderBSI(3);
					} elseif ($thisfile_ac3_raw_bsi['mixdef'] == 2) { // mixing option 3
						$thisfile_ac3_raw_bsi['mixdata']       =        $this->readHeaderBSI(12);
					} elseif ($thisfile_ac3_raw_bsi['mixdef'] == 3) { // mixing option 4
						$mixdefbitsread = 0;
						$thisfile_ac3_raw_bsi['mixdeflen']     =        $this->readHeaderBSI(5); $mixdefbitsread += 5;
						$thisfile_ac3_raw_bsi['flags']['mixdata2'] = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1;
						if ($thisfile_ac3_raw_bsi['flags']['mixdata2']) {
							$thisfile_ac3_raw_bsi['premixcmpsel']  = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1;
							$thisfile_ac3_raw_bsi['drcsrc']        = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1;
							$thisfile_ac3_raw_bsi['premixcmpscl']  =        $this->readHeaderBSI(3); $mixdefbitsread += 3;
							$thisfile_ac3_raw_bsi['flags']['extpgmlscl']   = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1;
							if ($thisfile_ac3_raw_bsi['flags']['extpgmlscl']) {
								$thisfile_ac3_raw_bsi['extpgmlscl']    =        $this->readHeaderBSI(4); $mixdefbitsread += 4;
							}
							$thisfile_ac3_raw_bsi['flags']['extpgmcscl']   = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1;
							if ($thisfile_ac3_raw_bsi['flags']['extpgmcscl']) {
								$thisfile_ac3_raw_bsi['extpgmcscl']    =        $this->readHeaderBSI(4); $mixdefbitsread += 4;
							}
							$thisfile_ac3_raw_bsi['flags']['extpgmrscl']   = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1;
							if ($thisfile_ac3_raw_bsi['flags']['extpgmrscl']) {
								$thisfile_ac3_raw_bsi['extpgmrscl']    =        $this->readHeaderBSI(4);
							}
							$thisfile_ac3_raw_bsi['flags']['extpgmlsscl']  = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1;
							if ($thisfile_ac3_raw_bsi['flags']['extpgmlsscl']) {
								$thisfile_ac3_raw_bsi['extpgmlsscl']   =        $this->readHeaderBSI(4); $mixdefbitsread += 4;
							}
							$thisfile_ac3_raw_bsi['flags']['extpgmrsscl']  = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1;
							if ($thisfile_ac3_raw_bsi['flags']['extpgmrsscl']) {
								$thisfile_ac3_raw_bsi['extpgmrsscl']   =        $this->readHeaderBSI(4); $mixdefbitsread += 4;
							}
							$thisfile_ac3_raw_bsi['flags']['extpgmlfescl'] = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1;
							if ($thisfile_ac3_raw_bsi['flags']['extpgmlfescl']) {
								$thisfile_ac3_raw_bsi['extpgmlfescl']  =        $this->readHeaderBSI(4); $mixdefbitsread += 4;
							}
							$thisfile_ac3_raw_bsi['flags']['dmixscl']      = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1;
							if ($thisfile_ac3_raw_bsi['flags']['dmixscl']) {
								$thisfile_ac3_raw_bsi['dmixscl']       =        $this->readHeaderBSI(4); $mixdefbitsread += 4;
							}
							$thisfile_ac3_raw_bsi['flags']['addch']        = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1;
							if ($thisfile_ac3_raw_bsi['flags']['addch']) {
								$thisfile_ac3_raw_bsi['flags']['extpgmaux1scl']   = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1;
								if ($thisfile_ac3_raw_bsi['flags']['extpgmaux1scl']) {
									$thisfile_ac3_raw_bsi['extpgmaux1scl']    =        $this->readHeaderBSI(4); $mixdefbitsread += 4;
								}
								$thisfile_ac3_raw_bsi['flags']['extpgmaux2scl']   = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1;
								if ($thisfile_ac3_raw_bsi['flags']['extpgmaux2scl']) {
									$thisfile_ac3_raw_bsi['extpgmaux2scl']    =        $this->readHeaderBSI(4); $mixdefbitsread += 4;
								}
							}
						}
						$thisfile_ac3_raw_bsi['flags']['mixdata3'] = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1;
						if ($thisfile_ac3_raw_bsi['flags']['mixdata3']) {
							$thisfile_ac3_raw_bsi['spchdat']   =        $this->readHeaderBSI(5); $mixdefbitsread += 5;
							$thisfile_ac3_raw_bsi['flags']['addspchdat'] = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1;
							if ($thisfile_ac3_raw_bsi['flags']['addspchdat']) {
								$thisfile_ac3_raw_bsi['spchdat1']   =         $this->readHeaderBSI(5); $mixdefbitsread += 5;
								$thisfile_ac3_raw_bsi['spchan1att'] =         $this->readHeaderBSI(2); $mixdefbitsread += 2;
								$thisfile_ac3_raw_bsi['flags']['addspchdat1'] = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1;
								if ($thisfile_ac3_raw_bsi['flags']['addspchdat1']) {
									$thisfile_ac3_raw_bsi['spchdat2']   =         $this->readHeaderBSI(5); $mixdefbitsread += 5;
									$thisfile_ac3_raw_bsi['spchan2att'] =         $this->readHeaderBSI(3); $mixdefbitsread += 3;
								}
							}
						}
						$mixdata_bits = (8 * ($thisfile_ac3_raw_bsi['mixdeflen'] + 2)) - $mixdefbitsread;
						$mixdata_fill = (($mixdata_bits % 8) ? 8 - ($mixdata_bits % 8) : 0);
						$thisfile_ac3_raw_bsi['mixdata']     =        $this->readHeaderBSI($mixdata_bits);
						$thisfile_ac3_raw_bsi['mixdatafill'] =        $this->readHeaderBSI($mixdata_fill);
						unset($mixdefbitsread, $mixdata_bits, $mixdata_fill);
					}
					if ($thisfile_ac3_raw_bsi['acmod'] < 2) { // if mono or dual mono source
						$thisfile_ac3_raw_bsi['flags']['paninfo'] = (bool) $this->readHeaderBSI(1);
						if ($thisfile_ac3_raw_bsi['flags']['paninfo']) {
							$thisfile_ac3_raw_bsi['panmean']   =        $this->readHeaderBSI(8);
							$thisfile_ac3_raw_bsi['paninfo']   =        $this->readHeaderBSI(6);
						}
						if ($thisfile_ac3_raw_bsi['acmod'] == 0) { // if 1+1 mode (dual mono, so some items need a second value)
							$thisfile_ac3_raw_bsi['flags']['paninfo2'] = (bool) $this->readHeaderBSI(1);
							if ($thisfile_ac3_raw_bsi['flags']['paninfo2']) {
								$thisfile_ac3_raw_bsi['panmean2']   =        $this->readHeaderBSI(8);
								$thisfile_ac3_raw_bsi['paninfo2']   =        $this->readHeaderBSI(6);
							}
						}
					}
					$thisfile_ac3_raw_bsi['flags']['frmmixcfginfo'] = (bool) $this->readHeaderBSI(1);
					if ($thisfile_ac3_raw_bsi['flags']['frmmixcfginfo']) { // mixing configuration information
						if ($thisfile_ac3_raw_bsi['numblkscod'] == 0) {
							$thisfile_ac3_raw_bsi['blkmixcfginfo'][0]  =        $this->readHeaderBSI(5);
						} else {
							for ($blk = 0; $blk < $thisfile_ac3_raw_bsi['numblkscod']; $blk++) {
								$thisfile_ac3_raw_bsi['flags']['blkmixcfginfo'.$blk] = (bool) $this->readHeaderBSI(1);
								if ($thisfile_ac3_raw_bsi['flags']['blkmixcfginfo'.$blk]) { // mixing configuration information
									$thisfile_ac3_raw_bsi['blkmixcfginfo'][$blk]  =        $this->readHeaderBSI(5);
								}
							}
						}
					}
				}
			}
			$thisfile_ac3_raw_bsi['flags']['infomdat']          = (bool) $this->readHeaderBSI(1);
			if ($thisfile_ac3_raw_bsi['flags']['infomdat']) { // Informational metadata
				$thisfile_ac3_raw_bsi['bsmod']                  =        $this->readHeaderBSI(3);
				$thisfile_ac3_raw_bsi['flags']['copyrightb']    = (bool) $this->readHeaderBSI(1);
				$thisfile_ac3_raw_bsi['flags']['origbs']        = (bool) $this->readHeaderBSI(1);
				if ($thisfile_ac3_raw_bsi['acmod'] == 2) { //  if in 2/0 mode
					$thisfile_ac3_raw_bsi['dsurmod']            =        $this->readHeaderBSI(2);
					$thisfile_ac3_raw_bsi['dheadphonmod']       =        $this->readHeaderBSI(2);
				}
				if ($thisfile_ac3_raw_bsi['acmod'] >= 6) { //  if both surround channels exist
					$thisfile_ac3_raw_bsi['dsurexmod']          =        $this->readHeaderBSI(2);
				}
				$thisfile_ac3_raw_bsi['flags']['audprodi']      = (bool) $this->readHeaderBSI(1);
				if ($thisfile_ac3_raw_bsi['flags']['audprodi']) {
					$thisfile_ac3_raw_bsi['mixlevel']           =        $this->readHeaderBSI(5);
					$thisfile_ac3_raw_bsi['roomtyp']            =        $this->readHeaderBSI(2);
					$thisfile_ac3_raw_bsi['flags']['adconvtyp'] = (bool) $this->readHeaderBSI(1);
				}
				if ($thisfile_ac3_raw_bsi['acmod'] == 0) { //  if 1+1 mode (dual mono, so some items need a second value)
					$thisfile_ac3_raw_bsi['flags']['audprodi2']      = (bool) $this->readHeaderBSI(1);
					if ($thisfile_ac3_raw_bsi['flags']['audprodi2']) {
						$thisfile_ac3_raw_bsi['mixlevel2']           =        $this->readHeaderBSI(5);
						$thisfile_ac3_raw_bsi['roomtyp2']            =        $this->readHeaderBSI(2);
						$thisfile_ac3_raw_bsi['flags']['adconvtyp2'] = (bool) $this->readHeaderBSI(1);
					}
				}
				if ($thisfile_ac3_raw_bsi['fscod'] < 3) { // if not half sample rate
					$thisfile_ac3_raw_bsi['flags']['sourcefscod'] = (bool) $this->readHeaderBSI(1);
				}
			}
			if (($thisfile_ac3_raw_bsi['strmtyp'] == 0) && ($thisfile_ac3_raw_bsi['numblkscod'] != 3)) { //  if both surround channels exist
				$thisfile_ac3_raw_bsi['flags']['convsync'] = (bool) $this->readHeaderBSI(1);
			}
			if ($thisfile_ac3_raw_bsi['strmtyp'] == 2) { //  if bit stream converted from AC-3
				if ($thisfile_ac3_raw_bsi['numblkscod'] != 3) { // 6 blocks per syncframe
					$thisfile_ac3_raw_bsi['flags']['blkid']  = 1;
				} else {
					$thisfile_ac3_raw_bsi['flags']['blkid']  = (bool) $this->readHeaderBSI(1);
				}
				if ($thisfile_ac3_raw_bsi['flags']['blkid']) {
					$thisfile_ac3_raw_bsi['frmsizecod']  =        $this->readHeaderBSI(6);
				}
			}
			$thisfile_ac3_raw_bsi['flags']['addbsi']  = (bool) $this->readHeaderBSI(1);
			if ($thisfile_ac3_raw_bsi['flags']['addbsi']) {
				$thisfile_ac3_raw_bsi['addbsil']  =        $this->readHeaderBSI(6);
				$thisfile_ac3_raw_bsi['addbsi']   =        $this->readHeaderBSI(($thisfile_ac3_raw_bsi['addbsil'] + 1) * 8);
			}

} else {

$this->error('Bit stream identification is version '.$thisfile_ac3_raw_bsi['bsid'].', but getID3() only understands up to version 16. Please submit a support ticket with a sample file.');
			unset($info['ac3']);
			return false;

}

if (isset($thisfile_ac3_raw_bsi['fscod2'])) {
			$thisfile_ac3['sample_rate'] = self::sampleRateCodeLookup2($thisfile_ac3_raw_bsi['fscod2']);
		} else {
			$thisfile_ac3['sample_rate'] = self::sampleRateCodeLookup($thisfile_ac3_raw_bsi['fscod']);
		}
		if ($thisfile_ac3_raw_bsi['fscod'] <= 3) {
			$info['audio']['sample_rate'] = $thisfile_ac3['sample_rate'];
		} else {
			$this->warning('Unexpected ac3.bsi.fscod value: '.$thisfile_ac3_raw_bsi['fscod']);
		}
		if (isset($thisfile_ac3_raw_bsi['frmsizecod'])) {
			$thisfile_ac3['frame_length'] = self::frameSizeLookup($thisfile_ac3_raw_bsi['frmsizecod'], $thisfile_ac3_raw_bsi['fscod']);
			$thisfile_ac3['bitrate']      = self::bitrateLookup($thisfile_ac3_raw_bsi['frmsizecod']);
		} elseif (!empty($thisfile_ac3_raw_bsi['frmsiz'])) {
			// this isn't right, but it's (usually) close, roughly 5% less than it should be.
			// but WHERE is the actual bitrate value stored in EAC3?? email info@getid3.org if you know!
			$thisfile_ac3['bitrate']      = ($thisfile_ac3_raw_bsi['frmsiz'] + 1) * 16 * 30; // The frmsiz field shall contain a value one less than the overall size of the coded syncframe in 16-bit words. That is, this field may assume a value ranging from 0 to 2047, and these values correspond to syncframe sizes ranging from 1 to 2048.
			// kludge-fix to make it approximately the expected value, still not "right":
			$thisfile_ac3['bitrate'] = round(($thisfile_ac3['bitrate'] * 1.05) / 16000) * 16000;
		}
		$info['audio']['bitrate'] = $thisfile_ac3['bitrate'];

if (isset($thisfile_ac3_raw_bsi['bsmod']) && isset($thisfile_ac3_raw_bsi['acmod'])) {
			$thisfile_ac3['service_type'] = self::serviceTypeLookup($thisfile_ac3_raw_bsi['bsmod'], $thisfile_ac3_raw_bsi['acmod']);
		}
		$ac3_coding_mode = self::audioCodingModeLookup($thisfile_ac3_raw_bsi['acmod']);
		foreach($ac3_coding_mode as $key => $value) {
			$thisfile_ac3[$key] = $value;
		}
		switch ($thisfile_ac3_raw_bsi['acmod']) {
			case 0:
			case 1:
				$info['audio']['channelmode'] = 'mono';
				break;
			case 3:
			case 4:
				$info['audio']['channelmode'] = 'stereo';
				break;
			default:
				$info['audio']['channelmode'] = 'surround';
				break;
		}
		$info['audio']['channels'] = $thisfile_ac3['num_channels'];

$thisfile_ac3['lfe_enabled'] = $thisfile_ac3_raw_bsi['flags']['lfeon'];
		if ($thisfile_ac3_raw_bsi['flags']['lfeon']) {
			$info['audio']['channels'] .= '.1';
		}

$thisfile_ac3['channels_enabled'] = self::channelsEnabledLookup($thisfile_ac3_raw_bsi['acmod'], $thisfile_ac3_raw_bsi['flags']['lfeon']);
		$thisfile_ac3['dialogue_normalization'] = '-'.$thisfile_ac3_raw_bsi['dialnorm'].'dB';

return true;
	}

/**
	 * @param int $length
	 *
	 * @return int
	 */
	private function readHeaderBSI($length) {
		$data = substr($this->AC3header['bsi'], $this->BSIoffset, $length);
		$this->BSIoffset += $length;

return bindec($data);
	}

/**
	 * @param int $fscod
	 *
	 * @return int|string|false
	 */
	public static function sampleRateCodeLookup($fscod) {
		static $sampleRateCodeLookup = array(
			0 => 48000,
			1 => 44100,
			2 => 32000,
			3 => 'reserved' // If the reserved code is indicated, the decoder should not attempt to decode audio and should mute.
		);
		return (isset($sampleRateCodeLookup[$fscod]) ? $sampleRateCodeLookup[$fscod] : false);
	}

/**
	 * @param int $fscod2
	 *
	 * @return int|string|false
	 */
	public static function sampleRateCodeLookup2($fscod2) {
		static $sampleRateCodeLookup2 = array(
			0 => 24000,
			1 => 22050,
			2 => 16000,
			3 => 'reserved' // If the reserved code is indicated, the decoder should not attempt to decode audio and should mute.
		);
		return (isset($sampleRateCodeLookup2[$fscod2]) ? $sampleRateCodeLookup2[$fscod2] : false);
	}

/**
	 * @param int $bsmod
	 * @param int $acmod
	 *
	 * @return string|false
	 */
	public static function serviceTypeLookup($bsmod, $acmod) {
		static $serviceTypeLookup = array();
		if (empty($serviceTypeLookup)) {
			for ($i = 0; $i <= 7; $i++) {
				$serviceTypeLookup[0][$i] = 'main audio service: complete main (CM)';
				$serviceTypeLookup[1][$i] = 'main audio service: music and effects (ME)';
				$serviceTypeLookup[2][$i] = 'associated service: visually impaired (VI)';
				$serviceTypeLookup[3][$i] = 'associated service: hearing impaired (HI)';
				$serviceTypeLookup[4][$i] = 'associated service: dialogue (D)';
				$serviceTypeLookup[5][$i] = 'associated service: commentary (C)';
				$serviceTypeLookup[6][$i] = 'associated service: emergency (E)';
			}

$serviceTypeLookup[7][1]      = 'associated service: voice over (VO)';
			for ($i = 2; $i <= 7; $i++) {
				$serviceTypeLookup[7][$i] = 'main audio service: karaoke';
			}
		}
		return (isset($serviceTypeLookup[$bsmod][$acmod]) ? $serviceTypeLookup[$bsmod][$acmod] : false);
	}

/**
	 * @param int $acmod
	 *
	 * @return array|false
	 */
	public static function audioCodingModeLookup($acmod) {
		// array(channel configuration, # channels (not incl LFE), channel order)
		static $audioCodingModeLookup = array (
			0 => array('channel_config'=>'1+1', 'num_channels'=>2, 'channel_order'=>'Ch1,Ch2'),
			1 => array('channel_config'=>'1/0', 'num_channels'=>1, 'channel_order'=>'C'),
			2 => array('channel_config'=>'2/0', 'num_channels'=>2, 'channel_order'=>'L,R'),
			3 => array('channel_config'=>'3/0', 'num_channels'=>3, 'channel_order'=>'L,C,R'),
			4 => array('channel_config'=>'2/1', 'num_channels'=>3, 'channel_order'=>'L,R,S'),
			5 => array('channel_config'=>'3/1', 'num_channels'=>4, 'channel_order'=>'L,C,R,S'),
			6 => array('channel_config'=>'2/2', 'num_channels'=>4, 'channel_order'=>'L,R,SL,SR'),
			7 => array('channel_config'=>'3/2', 'num_channels'=>5, 'channel_order'=>'L,C,R,SL,SR'),
		);
		return (isset($audioCodingModeLookup[$acmod]) ? $audioCodingModeLookup[$acmod] : false);
	}

/**
	 * @param int $cmixlev
	 *
	 * @return int|float|string|false
	 */
	public static function centerMixLevelLookup($cmixlev) {
		static $centerMixLevelLookup;
		if (empty($centerMixLevelLookup)) {
			$centerMixLevelLookup = array(
				0 => pow(2, -3.0 / 6), // 0.707 (-3.0 dB)
				1 => pow(2, -4.5 / 6), // 0.595 (-4.5 dB)
				2 => pow(2, -6.0 / 6), // 0.500 (-6.0 dB)
				3 => 'reserved'
			);
		}
		return (isset($centerMixLevelLookup[$cmixlev]) ? $centerMixLevelLookup[$cmixlev] : false);
	}

/**
	 * @param int $surmixlev
	 *
	 * @return int|float|string|false
	 */
	public static function surroundMixLevelLookup($surmixlev) {
		static $surroundMixLevelLookup;
		if (empty($surroundMixLevelLookup)) {
			$surroundMixLevelLookup = array(
				0 => pow(2, -3.0 / 6),
				1 => pow(2, -6.0 / 6),
				2 => 0,
				3 => 'reserved'
			);
		}
		return (isset($surroundMixLevelLookup[$surmixlev]) ? $surroundMixLevelLookup[$surmixlev] : false);
	}

/**
	 * @param int $dsurmod
	 *
	 * @return string|false
	 */
	public static function dolbySurroundModeLookup($dsurmod) {
		static $dolbySurroundModeLookup = array(
			0 => 'not indicated',
			1 => 'Not Dolby Surround encoded',
			2 => 'Dolby Surround encoded',
			3 => 'reserved'
		);
		return (isset($dolbySurroundModeLookup[$dsurmod]) ? $dolbySurroundModeLookup[$dsurmod] : false);
	}

/**
	 * @param int  $acmod
	 * @param bool $lfeon
	 *
	 * @return array
	 */
	public static function channelsEnabledLookup($acmod, $lfeon) {
		$lookup = array(
			'ch1'=>($acmod == 0),
			'ch2'=>($acmod == 0),
			'left'=>($acmod > 1),
			'right'=>($acmod > 1),
			'center'=>(bool) ($acmod & 0x01),
			'surround_mono'=>false,
			'surround_left'=>false,
			'surround_right'=>false,
			'lfe'=>$lfeon);
		switch ($acmod) {
			case 4:
			case 5:
				$lookup['surround_mono']  = true;
				break;
			case 6:
			case 7:
				$lookup['surround_left']  = true;
				$lookup['surround_right'] = true;
				break;
		}
		return $lookup;
	}

/**
	 * @param int $compre
	 *
	 * @return float|int
	 */
	public static function heavyCompression($compre) {
		// The first four bits indicate gain changes in 6.02dB increments which can be
		// implemented with an arithmetic shift operation. The following four bits
		// indicate linear gain changes, and require a 5-bit multiply.
		// We will represent the two 4-bit fields of compr as follows:
		//   X0 X1 X2 X3 . Y4 Y5 Y6 Y7
		// The meaning of the X values is most simply described by considering X to represent a 4-bit
		// signed integer with values from -8 to +7. The gain indicated by X is then (X + 1) * 6.02 dB. The
		// following table shows this in detail.

// Meaning of 4 msb of compr
		//  7    +48.16 dB
		//  6    +42.14 dB
		//  5    +36.12 dB
		//  4    +30.10 dB
		//  3    +24.08 dB
		//  2    +18.06 dB
		//  1    +12.04 dB
		//  0     +6.02 dB
		// -1         0 dB
		// -2     -6.02 dB
		// -3    -12.04 dB
		// -4    -18.06 dB
		// -5    -24.08 dB
		// -6    -30.10 dB
		// -7    -36.12 dB
		// -8    -42.14 dB

$fourbit = str_pad(decbin(($compre & 0xF0) >> 4), 4, '0', STR_PAD_LEFT);
		if ($fourbit[0] == '1') {
			$log_gain = -8 + bindec(substr($fourbit, 1));
		} else {
			$log_gain = bindec(substr($fourbit, 1));
		}
		$log_gain = ($log_gain + 1) * getid3_lib::RGADamplitude2dB(2);

// The value of Y is a linear representation of a gain change of up to -6 dB. Y is considered to
		// be an unsigned fractional integer, with a leading value of 1, or: 0.1 Y4 Y5 Y6 Y7 (base 2). Y can
		// represent values between 0.111112 (or 31/32) and 0.100002 (or 1/2). Thus, Y can represent gain
		// changes from -0.28 dB to -6.02 dB.

$lin_gain = (16 + ($compre & 0x0F)) / 32;

// The combination of X and Y values allows compr to indicate gain changes from
		//  48.16 - 0.28 = +47.89 dB, to
		// -42.14 - 6.02 = -48.16 dB.

return $log_gain - $lin_gain;
	}

/**
	 * @param int $roomtyp
	 *
	 * @return string|false
	 */
	public static function roomTypeLookup($roomtyp) {
		static $roomTypeLookup = array(
			0 => 'not indicated',
			1 => 'large room, X curve monitor',
			2 => 'small room, flat monitor',
			3 => 'reserved'
		);
		return (isset($roomTypeLookup[$roomtyp]) ? $roomTypeLookup[$roomtyp] : false);
	}

/**
	 * @param int $frmsizecod
	 * @param int $fscod
	 *
	 * @return int|false
	 */
	public static function frameSizeLookup($frmsizecod, $fscod) {
		// LSB is whether padding is used or not
		$padding     = (bool) ($frmsizecod & 0x01);
		$framesizeid =        ($frmsizecod & 0x3E) >> 1;

static $frameSizeLookup = array();
		if (empty($frameSizeLookup)) {
			$frameSizeLookup = array (
				0  => array( 128,  138,  192),  //  32 kbps
				1  => array( 160,  174,  240),  //  40 kbps
				2  => array( 192,  208,  288),  //  48 kbps
				3  => array( 224,  242,  336),  //  56 kbps
				4  => array( 256,  278,  384),  //  64 kbps
				5  => array( 320,  348,  480),  //  80 kbps
				6  => array( 384,  416,  576),  //  96 kbps
				7  => array( 448,  486,  672),  // 112 kbps
				8  => array( 512,  556,  768),  // 128 kbps
				9  => array( 640,  696,  960),  // 160 kbps
				10 => array( 768,  834, 1152),  // 192 kbps
				11 => array( 896,  974, 1344),  // 224 kbps
				12 => array(1024, 1114, 1536),  // 256 kbps
				13 => array(1280, 1392, 1920),  // 320 kbps
				14 => array(1536, 1670, 2304),  // 384 kbps
				15 => array(1792, 1950, 2688),  // 448 kbps
				16 => array(2048, 2228, 3072),  // 512 kbps
				17 => array(2304, 2506, 3456),  // 576 kbps
				18 => array(2560, 2786, 3840)   // 640 kbps
			);
		}
		$paddingBytes = 0;
		if (($fscod == 1) && $padding) {
			// frame lengths are padded by 1 word (16 bits) at 44100
			// (fscode==1) means 44100Hz (see sampleRateCodeLookup)
			$paddingBytes = 2;
		}
		return (isset($frameSizeLookup[$framesizeid][$fscod]) ? $frameSizeLookup[$framesizeid][$fscod] + $paddingBytes : false);
	}

/**
	 * @param int $frmsizecod
	 *
	 * @return int|false
	 */
	public static function bitrateLookup($frmsizecod) {
		// LSB is whether padding is used or not
		$padding     = (bool) ($frmsizecod & 0x01);
		$framesizeid =        ($frmsizecod & 0x3E) >> 1;

static $bitrateLookup = array(
			 0 =>  32000,
			 1 =>  40000,
			 2 =>  48000,
			 3 =>  56000,
			 4 =>  64000,
			 5 =>  80000,
			 6 =>  96000,
			 7 => 112000,
			 8 => 128000,
			 9 => 160000,
			10 => 192000,
			11 => 224000,
			12 => 256000,
			13 => 320000,
			14 => 384000,
			15 => 448000,
			16 => 512000,
			17 => 576000,
			18 => 640000,
		);
		return (isset($bitrateLookup[$framesizeid]) ? $bitrateLookup[$framesizeid] : false);
	}

/**
	 * @param int $numblkscod
	 *
	 * @return int|false
	 */
	public static function blocksPerSyncFrame($numblkscod) {
		static $blocksPerSyncFrameLookup = array(
			0 => 1,
			1 => 2,
			2 => 3,
			3 => 6,
		);
		return (isset($blocksPerSyncFrameLookup[$numblkscod]) ? $blocksPerSyncFrameLookup[$numblkscod] : false);
	}

}
����������������������������������������getid3.php������������������������������������������������������������������������������������������0000644�����������������00000236066�15150061000�0006435 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������<?php
/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org>               //
//  available at https://github.com/JamesHeinrich/getID3       //
//            or https://www.getid3.org                        //
//            or http://getid3.sourceforge.net                 //
//                                                             //
// Please see readme.txt for more information                  //
//                                                            ///
/////////////////////////////////////////////////////////////////

// define a constant rather than looking up every time it is needed
if (!defined('GETID3_OS_ISWINDOWS')) {
	define('GETID3_OS_ISWINDOWS', (stripos(PHP_OS, 'WIN') === 0));
}
// Get base path of getID3() - ONCE
if (!defined('GETID3_INCLUDEPATH')) {
	define('GETID3_INCLUDEPATH', dirname(__FILE__).DIRECTORY_SEPARATOR);
}
if (!defined('ENT_SUBSTITUTE')) { // PHP5.3 adds ENT_IGNORE, PHP5.4 adds ENT_SUBSTITUTE
	define('ENT_SUBSTITUTE', (defined('ENT_IGNORE') ? ENT_IGNORE : 8));
}

/*
https://www.getid3.org/phpBB3/viewtopic.php?t=2114
If you are running into a the problem where filenames with special characters are being handled
incorrectly by external helper programs (e.g. metaflac), notably with the special characters removed,
and you are passing in the filename in UTF8 (typically via a HTML form), try uncommenting this line:
*/
//setlocale(LC_CTYPE, 'en_US.UTF-8');

// attempt to define temp dir as something flexible but reliable
$temp_dir = ini_get('upload_tmp_dir');
if ($temp_dir && (!is_dir($temp_dir) || !is_readable($temp_dir))) {
	$temp_dir = '';
}
if (!$temp_dir && function_exists('sys_get_temp_dir')) { // sys_get_temp_dir added in PHP v5.2.1
	// sys_get_temp_dir() may give inaccessible temp dir, e.g. with open_basedir on virtual hosts
	$temp_dir = sys_get_temp_dir();
}
$temp_dir = @realpath($temp_dir); // see https://github.com/JamesHeinrich/getID3/pull/10
$open_basedir = ini_get('open_basedir');
if ($open_basedir) {
	// e.g. "/var/www/vhosts/getid3.org/httpdocs/:/tmp/"
	$temp_dir     = str_replace(array('/', '\\'), DIRECTORY_SEPARATOR, $temp_dir);
	$open_basedir = str_replace(array('/', '\\'), DIRECTORY_SEPARATOR, $open_basedir);
	if (substr($temp_dir, -1, 1) != DIRECTORY_SEPARATOR) {
		$temp_dir .= DIRECTORY_SEPARATOR;
	}
	$found_valid_tempdir = false;
	$open_basedirs = explode(PATH_SEPARATOR, $open_basedir);
	foreach ($open_basedirs as $basedir) {
		if (substr($basedir, -1, 1) != DIRECTORY_SEPARATOR) {
			$basedir .= DIRECTORY_SEPARATOR;
		}
		if (strpos($temp_dir, $basedir) === 0) {
			$found_valid_tempdir = true;
			break;
		}
	}
	if (!$found_valid_tempdir) {
		$temp_dir = '';
	}
	unset($open_basedirs, $found_valid_tempdir, $basedir);
}
if (!$temp_dir) {
	$temp_dir = '*'; // invalid directory name should force tempnam() to use system default temp dir
}
// $temp_dir = '/something/else/';  // feel free to override temp dir here if it works better for your system
if (!defined('GETID3_TEMP_DIR')) {
	define('GETID3_TEMP_DIR', $temp_dir);
}
unset($open_basedir, $temp_dir);

// End: Defines

class getID3
{
	/*
	 * Settings
	 */

/**
	 * CASE SENSITIVE! - i.e. (must be supported by iconv()). Examples:  ISO-8859-1  UTF-8  UTF-16  UTF-16BE
	 *
	 * @var string
	 */
	public $encoding        = 'UTF-8';

/**
	 * Should always be 'ISO-8859-1', but some tags may be written in other encodings such as 'EUC-CN' or 'CP1252'
	 *
	 * @var string
	 */
	public $encoding_id3v1  = 'ISO-8859-1';

/**
	 * ID3v1 should always be 'ISO-8859-1', but some tags may be written in other encodings such as 'Windows-1251' or 'KOI8-R'. If true attempt to detect these encodings, but may return incorrect values for some tags actually in ISO-8859-1 encoding
	 *
	 * @var bool
	 */
	public $encoding_id3v1_autodetect  = false;

/*
	 * Optional tag checks - disable for speed.
	 */

/**
	 * Read and process ID3v1 tags
	 *
	 * @var bool
	 */
	public $option_tag_id3v1         = true;

/**
	 * Read and process ID3v2 tags
	 *
	 * @var bool
	 */
	public $option_tag_id3v2         = true;

/**
	 * Read and process Lyrics3 tags
	 *
	 * @var bool
	 */
	public $option_tag_lyrics3       = true;

/**
	 * Read and process APE tags
	 *
	 * @var bool
	 */
	public $option_tag_apetag        = true;

/**
	 * Copy tags to root key 'tags' and encode to $this->encoding
	 *
	 * @var bool
	 */
	public $option_tags_process      = true;

/**
	 * Copy tags to root key 'tags_html' properly translated from various encodings to HTML entities
	 *
	 * @var bool
	 */
	public $option_tags_html         = true;

/*
	 * Optional tag/comment calculations
	 */

/**
	 * Calculate additional info such as bitrate, channelmode etc
	 *
	 * @var bool
	 */
	public $option_extra_info        = true;

/*
	 * Optional handling of embedded attachments (e.g. images)
	 */

/**
	 * Defaults to true (ATTACHMENTS_INLINE) for backward compatibility
	 *
	 * @var bool|string
	 */
	public $option_save_attachments  = true;

/*
	 * Optional calculations
	 */

/**
	 * Get MD5 sum of data part - slow
	 *
	 * @var bool
	 */
	public $option_md5_data          = false;

/**
	 * Use MD5 of source file if available - only FLAC and OptimFROG
	 *
	 * @var bool
	 */
	public $option_md5_data_source   = false;

/**
	 * Get SHA1 sum of data part - slow
	 *
	 * @var bool
	 */
	public $option_sha1_data         = false;

/**
	 * Check whether file is larger than 2GB and thus not supported by 32-bit PHP (null: auto-detect based on
	 * PHP_INT_MAX)
	 *
	 * @var bool|null
	 */
	public $option_max_2gb_check;

/**
	 * Read buffer size in bytes
	 *
	 * @var int
	 */
	public $option_fread_buffer_size = 32768;

// module-specific options

/** archive.rar
	 * if true use PHP RarArchive extension, if false (non-extension parsing not yet written in getID3)
	 *
	 * @var bool
	 */
	public $options_archive_rar_use_php_rar_extension = true;

/** archive.gzip
	 * Optional file list - disable for speed.
	 * Decode gzipped files, if possible, and parse recursively (.tar.gz for example).
	 *
	 * @var bool
	 */
	public $options_archive_gzip_parse_contents = false;

/** audio.midi
	 * if false only parse most basic information, much faster for some files but may be inaccurate
	 *
	 * @var bool
	 */
	public $options_audio_midi_scanwholefile = true;

/** audio.mp3
	 * Forces getID3() to scan the file byte-by-byte and log all the valid audio frame headers - extremely slow,
	 * unrecommended, but may provide data from otherwise-unusable files.
	 *
	 * @var bool
	 */
	public $options_audio_mp3_allow_bruteforce = false;

/** audio.mp3
	 * number of frames to scan to determine if MPEG-audio sequence is valid
	 * Lower this number to 5-20 for faster scanning
	 * Increase this number to 50+ for most accurate detection of valid VBR/CBR mpeg-audio streams
	 *
	 * @var int
	 */
	public $options_audio_mp3_mp3_valid_check_frames = 50;

/** audio.wavpack
	 * Avoid scanning all frames (break after finding ID_RIFF_HEADER and ID_CONFIG_BLOCK,
	 * significantly faster for very large files but other data may be missed
	 *
	 * @var bool
	 */
	public $options_audio_wavpack_quick_parsing = false;

/** audio-video.flv
	 * Break out of the loop if too many frames have been scanned; only scan this
	 * many if meta frame does not contain useful duration.
	 *
	 * @var int
	 */
	public $options_audiovideo_flv_max_frames = 100000;

/** audio-video.matroska
	 * If true, do not return information about CLUSTER chunks, since there's a lot of them
	 * and they're not usually useful [default: TRUE].
	 *
	 * @var bool
	 */
	public $options_audiovideo_matroska_hide_clusters    = true;

/** audio-video.matroska
	 * True to parse the whole file, not only header [default: FALSE].
	 *
	 * @var bool
	 */
	public $options_audiovideo_matroska_parse_whole_file = false;

/** audio-video.quicktime
	 * return all parsed data from all atoms if true, otherwise just returned parsed metadata
	 *
	 * @var bool
	 */
	public $options_audiovideo_quicktime_ReturnAtomData  = false;

/** audio-video.quicktime
	 * return all parsed data from all atoms if true, otherwise just returned parsed metadata
	 *
	 * @var bool
	 */
	public $options_audiovideo_quicktime_ParseAllPossibleAtoms = false;

/** audio-video.swf
	 * return all parsed tags if true, otherwise do not return tags not parsed by getID3
	 *
	 * @var bool
	 */
	public $options_audiovideo_swf_ReturnAllTagData = false;

/** graphic.bmp
	 * return BMP palette
	 *
	 * @var bool
	 */
	public $options_graphic_bmp_ExtractPalette = false;

/** graphic.bmp
	 * return image data
	 *
	 * @var bool
	 */
	public $options_graphic_bmp_ExtractData    = false;

/** graphic.png
	 * If data chunk is larger than this do not read it completely (getID3 only needs the first
	 * few dozen bytes for parsing).
	 *
	 * @var int
	 */
	public $options_graphic_png_max_data_bytes = 10000000;

/** misc.pdf
	 * return full details of PDF Cross-Reference Table (XREF)
	 *
	 * @var bool
	 */
	public $options_misc_pdf_returnXREF = false;

/** misc.torrent
	 * Assume all .torrent files are less than 1MB and just read entire thing into memory for easy processing.
	 * Override this value if you need to process files larger than 1MB
	 *
	 * @var int
	 */
	public $options_misc_torrent_max_torrent_filesize = 1048576;

// Public variables

/**
	 * Filename of file being analysed.
	 *
	 * @var string
	 */
	public $filename;

/**
	 * Filepointer to file being analysed.
	 *
	 * @var resource
	 */
	public $fp;

/**
	 * Result array.
	 *
	 * @var array
	 */
	public $info;

/**
	 * @var string
	 */
	public $tempdir = GETID3_TEMP_DIR;

/**
	 * @var int
	 */
	public $memory_limit = 0;

/**
	 * @var string
	 */
	protected $startup_error   = '';

/**
	 * @var string
	 */
	protected $startup_warning = '';

const VERSION           = '1.9.24-202509040923';
	const FREAD_BUFFER_SIZE = 32768;

const ATTACHMENTS_NONE   = false;
	const ATTACHMENTS_INLINE = true;

/**
	 * @throws getid3_exception
	 */
	public function __construct() {

// Check for PHP version
		$required_php_version = '5.3.0';
		if (version_compare(PHP_VERSION, $required_php_version, '<')) {
			$this->startup_error .= 'getID3() requires PHP v'.$required_php_version.' or higher - you are running v'.PHP_VERSION."\n";
			return;
		}

// Check memory
		$memoryLimit = ini_get('memory_limit');
		if (preg_match('#([0-9]+) ?M#i', $memoryLimit, $matches)) {
			// could be stored as "16M" rather than 16777216 for example
			$memoryLimit = (int) $matches[1] * 1048576;
		} elseif (preg_match('#([0-9]+) ?G#i', $memoryLimit, $matches)) { // The 'G' modifier is available since PHP 5.1.0
			// could be stored as "2G" rather than 2147483648 for example
			$memoryLimit = (int) $matches[1] * 1073741824;
		}
		$this->memory_limit = $memoryLimit;

if ($this->memory_limit <= 0) {
			// memory limits probably disabled
		} elseif ($this->memory_limit <= 4194304) {
			$this->startup_error .= 'PHP has less than 4MB available memory and will very likely run out. Increase memory_limit in php.ini'."\n";
		} elseif ($this->memory_limit <= 12582912) {
			$this->startup_warning .= 'PHP has less than 12MB available memory and might run out if all modules are loaded. Increase memory_limit in php.ini'."\n";
		}

// Check safe_mode off
		if (preg_match('#(1|ON)#i', ini_get('safe_mode'))) {
			$this->warning('WARNING: Safe mode is on, shorten support disabled, md5data/sha1data for ogg vorbis disabled, ogg vorbos/flac tag writing disabled.');
		}

if (($mbstring_func_overload = (int) ini_get('mbstring.func_overload')) && ($mbstring_func_overload & 0x02)) {
			// http://php.net/manual/en/mbstring.overload.php
			// "mbstring.func_overload in php.ini is a positive value that represents a combination of bitmasks specifying the categories of functions to be overloaded. It should be set to 1 to overload the mail() function. 2 for string functions, 4 for regular expression functions"
			// getID3 cannot run when string functions are overloaded. It doesn't matter if mail() or ereg* functions are overloaded since getID3 does not use those.
			$this->startup_error .= 'WARNING: php.ini contains "mbstring.func_overload = '.ini_get('mbstring.func_overload').'", getID3 cannot run with this setting (bitmask 2 (string functions) cannot be set). Recommended to disable entirely.'."\n";
		}

// check for magic quotes in PHP < 5.4.0 (when these options were removed and getters always return false)
		if (version_compare(PHP_VERSION, '5.4.0', '<')) {
			// Check for magic_quotes_runtime
			if (function_exists('get_magic_quotes_runtime')) {
				if (get_magic_quotes_runtime()) { // @phpstan-ignore-line
					$this->startup_error .= 'magic_quotes_runtime must be disabled before running getID3(). Surround getid3 block by set_magic_quotes_runtime(0) and set_magic_quotes_runtime(1).'."\n";
				}
			}
			// Check for magic_quotes_gpc
			if (function_exists('get_magic_quotes_gpc')) {
				if (get_magic_quotes_gpc()) {
					$this->startup_error .= 'magic_quotes_gpc must be disabled before running getID3(). Surround getid3 block by set_magic_quotes_gpc(0) and set_magic_quotes_gpc(1).'."\n";
				}
			}
		}

// Load support library
		if (!include_once(GETID3_INCLUDEPATH.'getid3.lib.php')) {
			$this->startup_error .= 'getid3.lib.php is missing or corrupt'."\n";
		}

if ($this->option_max_2gb_check === null) {
			$this->option_max_2gb_check = (PHP_INT_MAX <= 2147483647);
		}

// Needed for Windows only:
		// Define locations of helper applications for Shorten, VorbisComment, MetaFLAC
		//   as well as other helper functions such as head, etc
		// This path cannot contain spaces, but the below code will attempt to get the
		//   8.3-equivalent path automatically
		// IMPORTANT: This path must include the trailing slash
		if (GETID3_OS_ISWINDOWS && !defined('GETID3_HELPERAPPSDIR')) {

$helperappsdir = GETID3_INCLUDEPATH.'..'.DIRECTORY_SEPARATOR.'helperapps'; // must not have any space in this path

if (!is_dir($helperappsdir)) {
				$this->startup_warning .= '"'.$helperappsdir.'" cannot be defined as GETID3_HELPERAPPSDIR because it does not exist'."\n";
			} elseif (strpos(realpath($helperappsdir), ' ') !== false) {
				$DirPieces = explode(DIRECTORY_SEPARATOR, realpath($helperappsdir));
				$path_so_far = array();
				foreach ($DirPieces as $key => $value) {
					if (strpos($value, ' ') !== false) {
						if (!empty($path_so_far)) {
							$commandline = 'dir /x '.escapeshellarg(implode(DIRECTORY_SEPARATOR, $path_so_far));
							$dir_listing = shell_exec($commandline);
							$lines = explode("\n", $dir_listing);
							foreach ($lines as $line) {
								$line = trim($line);
								if (preg_match('#^([0-9/]{10}) +([0-9:]{4,5}( [AP]M)?) +(<DIR>|[0-9,]+) +([^ ]{0,11}) +(.+)$#', $line, $matches)) {
									list($dummy, $date, $time, $ampm, $filesize, $shortname, $filename) = $matches;
									if ((strtoupper($filesize) == '<DIR>') && (strtolower($filename) == strtolower($value))) {
										$value = $shortname;
									}
								}
							}
						} else {
							$this->startup_warning .= 'GETID3_HELPERAPPSDIR must not have any spaces in it - use 8dot3 naming convention if neccesary. You can run "dir /x" from the commandline to see the correct 8.3-style names.'."\n";
						}
					}
					$path_so_far[] = $value;
				}
				$helperappsdir = implode(DIRECTORY_SEPARATOR, $path_so_far);
			}
			define('GETID3_HELPERAPPSDIR', $helperappsdir.DIRECTORY_SEPARATOR);
		}

if (!empty($this->startup_error)) {
			echo $this->startup_error;
			throw new getid3_exception($this->startup_error);
		}
	}

/**
	 * @return string
	 */
	public function version() {
		return self::VERSION;
	}

/**
	 * @return int
	 */
	public function fread_buffer_size() {
		return $this->option_fread_buffer_size;
	}

/**
	 * @param array $optArray
	 *
	 * @return bool
	 */
	public function setOption($optArray) {
		if (empty($optArray)) {
			return false;
		}
		foreach ($optArray as $opt => $val) {
			if (isset($this->$opt) === false) {
				continue;
			}
			$this->$opt = $val;
		}
		return true;
	}

/**
	 * @param string   $filename
	 * @param int      $filesize
	 * @param resource $fp
	 *
	 * @return bool
	 *
	 * @throws getid3_exception
	 */
	public function openfile($filename, $filesize=null, $fp=null) {
		try {
			if (!empty($this->startup_error)) {
				throw new getid3_exception($this->startup_error);
			}
			if (!empty($this->startup_warning)) {
				foreach (explode("\n", $this->startup_warning) as $startup_warning) {
					$this->warning($startup_warning);
				}
			}

// init result array and set parameters
			$this->filename = $filename;
			$this->info = array();
			$this->info['GETID3_VERSION']   = $this->version();
			$this->info['php_memory_limit'] = (($this->memory_limit > 0) ? $this->memory_limit : false);

// remote files not supported
			if (preg_match('#^(ht|f)tps?://#', $filename)) {
				throw new getid3_exception('Remote files are not supported - please copy the file locally first');
			}

$filename = str_replace('/', DIRECTORY_SEPARATOR, $filename);
			//$filename = preg_replace('#(?<!gs:)('.preg_quote(DIRECTORY_SEPARATOR).'{2,})#', DIRECTORY_SEPARATOR, $filename);

// open local file
			//if (is_readable($filename) && is_file($filename) && ($this->fp = fopen($filename, 'rb'))) { // see https://www.getid3.org/phpBB3/viewtopic.php?t=1720
			if (($fp != null) && ((get_resource_type($fp) == 'file') || (get_resource_type($fp) == 'stream'))) {
				$this->fp = $fp;
			} elseif ((is_readable($filename) || file_exists($filename)) && is_file($filename) && ($this->fp = fopen($filename, 'rb'))) {
				// great
			} else {
				$errormessagelist = array();
				if (!is_readable($filename)) {
					$errormessagelist[] = '!is_readable';
				}
				if (!is_file($filename)) {
					$errormessagelist[] = '!is_file';
				}
				if (!file_exists($filename)) {
					$errormessagelist[] = '!file_exists';
				}
				if (empty($errormessagelist)) {
					$errormessagelist[] = 'fopen failed';
				}
				throw new getid3_exception('Could not open "'.$filename.'" ('.implode('; ', $errormessagelist).')');
			}

$this->info['filesize'] = (!is_null($filesize) ? $filesize : filesize($filename));
			// set redundant parameters - might be needed in some include file
			// filenames / filepaths in getID3 are always expressed with forward slashes (unix-style) for both Windows and other to try and minimize confusion
			$filename = str_replace('\\', '/', $filename);
			$this->info['filepath']     = str_replace('\\', '/', realpath(dirname($filename)));
			$this->info['filename']     = getid3_lib::mb_basename($filename);
			$this->info['filenamepath'] = $this->info['filepath'].'/'.$this->info['filename'];

// set more parameters
			$this->info['avdataoffset']        = 0;
			$this->info['avdataend']           = $this->info['filesize'];
			$this->info['fileformat']          = '';                // filled in later
			$this->info['audio']['dataformat'] = '';                // filled in later, unset if not used
			$this->info['video']['dataformat'] = '';                // filled in later, unset if not used
			$this->info['tags']                = array();           // filled in later, unset if not used
			$this->info['error']               = array();           // filled in later, unset if not used
			$this->info['warning']             = array();           // filled in later, unset if not used
			$this->info['comments']            = array();           // filled in later, unset if not used
			$this->info['encoding']            = $this->encoding;   // required by id3v2 and iso modules - can be unset at the end if desired

// option_max_2gb_check
			if ($this->option_max_2gb_check) {
				// PHP (32-bit all, and 64-bit Windows) doesn't support integers larger than 2^31 (~2GB)
				// filesize() simply returns (filesize % (pow(2, 32)), no matter the actual filesize
				// ftell() returns 0 if seeking to the end is beyond the range of unsigned integer
				$fseek = fseek($this->fp, 0, SEEK_END);
				if (($fseek < 0) || (($this->info['filesize'] != 0) && (ftell($this->fp) == 0)) ||
					($this->info['filesize'] < 0) ||
					(ftell($this->fp) < 0)) {
						$real_filesize = getid3_lib::getFileSizeSyscall($this->info['filenamepath']);

if ($real_filesize === false) {
							unset($this->info['filesize']);
							fclose($this->fp);
							throw new getid3_exception('Unable to determine actual filesize. File is most likely larger than '.round(PHP_INT_MAX / 1073741824).'GB and is not supported by PHP.');
						} elseif (getid3_lib::intValueSupported($real_filesize)) {
							unset($this->info['filesize']);
							fclose($this->fp);
							throw new getid3_exception('PHP seems to think the file is larger than '.round(PHP_INT_MAX / 1073741824).'GB, but filesystem reports it as '.number_format($real_filesize / 1073741824, 3).'GB, please report to info@getid3.org');
						}
						$this->info['filesize'] = $real_filesize;
						$this->warning('File is larger than '.round(PHP_INT_MAX / 1073741824).'GB (filesystem reports it as '.number_format($real_filesize / 1073741824, 3).'GB) and is not properly supported by PHP.');
				}
			}

return true;

} catch (Exception $e) {
			$this->error($e->getMessage());
		}
		return false;
	}

/**
	 * analyze file
	 *
	 * @param string   $filename
	 * @param int      $filesize
	 * @param string   $original_filename
	 * @param resource $fp
	 *
	 * @return array
	 */
	public function analyze($filename, $filesize=null, $original_filename='', $fp=null) {
		try {
			if (!$this->openfile($filename, $filesize, $fp)) {
				return $this->info;
			}

// Handle tags
			foreach (array('id3v2'=>'id3v2', 'id3v1'=>'id3v1', 'apetag'=>'ape', 'lyrics3'=>'lyrics3') as $tag_name => $tag_key) {
				$option_tag = 'option_tag_'.$tag_name;
				if ($this->$option_tag) {
					$this->include_module('tag.'.$tag_name);
					try {
						$tag_class = 'getid3_'.$tag_name;
						$tag = new $tag_class($this);
						$tag->Analyze();
					}
					catch (getid3_exception $e) {
						throw $e;
					}
				} else {
					$this->warning('skipping check for '.$tag_name.' tags since option_tag_'.$tag_name.'=FALSE');
				}
			}
			if (isset($this->info['id3v2']['tag_offset_start'])) {
				$this->info['avdataoffset'] = max($this->info['avdataoffset'], $this->info['id3v2']['tag_offset_end']);
			}
			foreach (array('id3v1'=>'id3v1', 'apetag'=>'ape', 'lyrics3'=>'lyrics3') as $tag_name => $tag_key) {
				if (isset($this->info[$tag_key]['tag_offset_start'])) {
					$this->info['avdataend'] = min($this->info['avdataend'], $this->info[$tag_key]['tag_offset_start']);
				}
			}

// ID3v2 detection (NOT parsing), even if ($this->option_tag_id3v2 == false) done to make fileformat easier
			if (!$this->option_tag_id3v2) {
				fseek($this->fp, 0);
				$header = fread($this->fp, 10);
				if ((substr($header, 0, 3) == 'ID3') && (strlen($header) == 10)) {
					$this->info['id3v2']['header']        = true;
					$this->info['id3v2']['majorversion']  = ord($header[3]);
					$this->info['id3v2']['minorversion']  = ord($header[4]);
					$this->info['avdataoffset']          += getid3_lib::BigEndian2Int(substr($header, 6, 4), 1) + 10; // length of ID3v2 tag in 10-byte header doesn't include 10-byte header length
				}
			}

// read 32 kb file data
			fseek($this->fp, $this->info['avdataoffset']);
			$formattest = fread($this->fp, 32774);

// determine format
			$determined_format = $this->GetFileFormat($formattest, ($original_filename ? $original_filename : $filename));

// unable to determine file format
			if (!$determined_format) {
				fclose($this->fp);
				return $this->error('unable to determine file format');
			}

// check for illegal ID3 tags
			if (isset($determined_format['fail_id3']) && (in_array('id3v1', $this->info['tags']) || in_array('id3v2', $this->info['tags']))) {
				if ($determined_format['fail_id3'] === 'ERROR') {
					fclose($this->fp);
					return $this->error('ID3 tags not allowed on this file type.');
				} elseif ($determined_format['fail_id3'] === 'WARNING') {
					$this->warning('ID3 tags not allowed on this file type.');
				}
			}

// check for illegal APE tags
			if (isset($determined_format['fail_ape']) && in_array('ape', $this->info['tags'])) {
				if ($determined_format['fail_ape'] === 'ERROR') {
					fclose($this->fp);
					return $this->error('APE tags not allowed on this file type.');
				} elseif ($determined_format['fail_ape'] === 'WARNING') {
					$this->warning('APE tags not allowed on this file type.');
				}
			}

// set mime type
			$this->info['mime_type'] = $determined_format['mime_type'];

// supported format signature pattern detected, but module deleted
			if (!file_exists(GETID3_INCLUDEPATH.$determined_format['include'])) {
				fclose($this->fp);
				return $this->error('Format not supported, module "'.$determined_format['include'].'" was removed.');
			}

// module requires mb_convert_encoding/iconv support
			// Check encoding/iconv support
			if (!empty($determined_format['iconv_req']) && !function_exists('mb_convert_encoding') && !function_exists('iconv') && !in_array($this->encoding, array('ISO-8859-1', 'UTF-8', 'UTF-16LE', 'UTF-16BE', 'UTF-16'))) {
				$errormessage = 'mb_convert_encoding() or iconv() support is required for this module ('.$determined_format['include'].') for encodings other than ISO-8859-1, UTF-8, UTF-16LE, UTF16-BE, UTF-16. ';
				if (GETID3_OS_ISWINDOWS) {
					$errormessage .= 'PHP does not have mb_convert_encoding() or iconv() support. Please enable php_mbstring.dll / php_iconv.dll in php.ini, and copy php_mbstring.dll / iconv.dll from c:/php/dlls to c:/windows/system32';
				} else {
					$errormessage .= 'PHP is not compiled with mb_convert_encoding() or iconv() support. Please recompile with the --enable-mbstring / --with-iconv switch';
				}
				return $this->error($errormessage);
			}

// include module
			include_once(GETID3_INCLUDEPATH.$determined_format['include']);

// instantiate module class
			$class_name = 'getid3_'.$determined_format['module'];
			if (!class_exists($class_name)) {
				return $this->error('Format not supported, module "'.$determined_format['include'].'" is corrupt.');
			}
			$class = new $class_name($this);

// set module-specific options
			foreach (get_object_vars($this) as $getid3_object_vars_key => $getid3_object_vars_value) {
				if (preg_match('#^options_([^_]+)_([^_]+)_(.+)$#i', $getid3_object_vars_key, $matches)) {
					list($dummy, $GOVgroup, $GOVmodule, $GOVsetting) = $matches;
					$GOVgroup = (($GOVgroup == 'audiovideo') ? 'audio-video' : $GOVgroup); // variable names can only contain 0-9a-z_ so standardize here
					if (($GOVgroup == $determined_format['group']) && ($GOVmodule == $determined_format['module'])) {
						$class->$GOVsetting = $getid3_object_vars_value;
					}
				}
			}

$class->Analyze();
			unset($class);

// close file
			fclose($this->fp);

// process all tags - copy to 'tags' and convert charsets
			if ($this->option_tags_process) {
				$this->HandleAllTags();
			}

// perform more calculations
			if ($this->option_extra_info) {
				$this->ChannelsBitratePlaytimeCalculations();
				$this->CalculateCompressionRatioVideo();
				$this->CalculateCompressionRatioAudio();
				$this->CalculateReplayGain();
				$this->ProcessAudioStreams();
			}

// get the MD5 sum of the audio/video portion of the file - without ID3/APE/Lyrics3/etc header/footer tags
			if ($this->option_md5_data) {
				// do not calc md5_data if md5_data_source is present - set by flac only - future MPC/SV8 too
				if (!$this->option_md5_data_source || empty($this->info['md5_data_source'])) {
					$this->getHashdata('md5');
				}
			}

// get the SHA1 sum of the audio/video portion of the file - without ID3/APE/Lyrics3/etc header/footer tags
			if ($this->option_sha1_data) {
				$this->getHashdata('sha1');
			}

// remove undesired keys
			$this->CleanUp();

} catch (Exception $e) {
			$this->error('Caught exception: '.$e->getMessage());
		}

// return info array
		return $this->info;
	}

/**
	 * Error handling.
	 *
	 * @param string $message
	 *
	 * @return array
	 */
	public function error($message) {
		$this->CleanUp();
		if (!isset($this->info['error'])) {
			$this->info['error'] = array();
		}
		$this->info['error'][] = $message;
		return $this->info;
	}

/**
	 * Warning handling.
	 *
	 * @param string $message
	 *
	 * @return bool
	 */
	public function warning($message) {
		$this->info['warning'][] = $message;
		return true;
	}

/**
	 * @return bool
	 */
	private function CleanUp() {

// remove possible empty keys
		$AVpossibleEmptyKeys = array('dataformat', 'bits_per_sample', 'encoder_options', 'streams', 'bitrate');
		foreach ($AVpossibleEmptyKeys as $dummy => $key) {
			if (empty($this->info['audio'][$key]) && isset($this->info['audio'][$key])) {
				unset($this->info['audio'][$key]);
			}
			if (empty($this->info['video'][$key]) && isset($this->info['video'][$key])) {
				unset($this->info['video'][$key]);
			}
		}

// remove empty root keys
		if (!empty($this->info)) {
			foreach ($this->info as $key => $value) {
				if (empty($this->info[$key]) && ($this->info[$key] !== 0) && ($this->info[$key] !== '0')) {
					unset($this->info[$key]);
				}
			}
		}

// remove meaningless entries from unknown-format files
		if (empty($this->info['fileformat'])) {
			if (isset($this->info['avdataoffset'])) {
				unset($this->info['avdataoffset']);
			}
			if (isset($this->info['avdataend'])) {
				unset($this->info['avdataend']);
			}
		}

// remove possible duplicated identical entries
		if (!empty($this->info['error'])) {
			$this->info['error'] = array_values(array_unique($this->info['error']));
		}
		if (!empty($this->info['warning'])) {
			$this->info['warning'] = array_values(array_unique($this->info['warning']));
		}

// remove "global variable" type keys
		unset($this->info['php_memory_limit']);

return true;
	}

/**
	 * Return array containing information about all supported formats.
	 *
	 * @return array
	 */
	public function GetFileFormatArray() {
		static $format_info = array();
		if (empty($format_info)) {
			$format_info = array(

// Audio formats

// AC-3   - audio      - Dolby AC-3 / Dolby Digital
				'ac3'  => array(
							'pattern'   => '^\\x0B\\x77',
							'group'     => 'audio',
							'module'    => 'ac3',
							'mime_type' => 'audio/ac3',
						),

// AAC  - audio       - Advanced Audio Coding (AAC) - ADIF format
				'adif' => array(
							'pattern'   => '^ADIF',
							'group'     => 'audio',
							'module'    => 'aac',
							'mime_type' => 'audio/aac',
							'fail_ape'  => 'WARNING',
						),

/*
				// AA   - audio       - Audible Audiobook
				'aa'   => array(
							'pattern'   => '^.{4}\\x57\\x90\\x75\\x36',
							'group'     => 'audio',
							'module'    => 'aa',
							'mime_type' => 'audio/audible',
						),
*/
				// AAC  - audio       - Advanced Audio Coding (AAC) - ADTS format (very similar to MP3)
				'adts' => array(
							'pattern'   => '^\\xFF[\\xF0-\\xF1\\xF8-\\xF9]',
							'group'     => 'audio',
							'module'    => 'aac',
							'mime_type' => 'audio/aac',
							'fail_ape'  => 'WARNING',
						),

// AU   - audio       - NeXT/Sun AUdio (AU)
				'au'   => array(
							'pattern'   => '^\\.snd',
							'group'     => 'audio',
							'module'    => 'au',
							'mime_type' => 'audio/basic',
						),

// AMR  - audio       - Adaptive Multi Rate
				'amr'  => array(
							'pattern'   => '^\\x23\\x21AMR\\x0A', // #!AMR[0A]
							'group'     => 'audio',
							'module'    => 'amr',
							'mime_type' => 'audio/amr',
						),

// AVR  - audio       - Audio Visual Research
				'avr'  => array(
							'pattern'   => '^2BIT',
							'group'     => 'audio',
							'module'    => 'avr',
							'mime_type' => 'application/octet-stream',
						),

// BONK - audio       - Bonk v0.9+
				'bonk' => array(
							'pattern'   => '^\\x00(BONK|INFO|META| ID3)',
							'group'     => 'audio',
							'module'    => 'bonk',
							'mime_type' => 'audio/xmms-bonk',
						),

// DSF  - audio       - Direct Stream Digital (DSD) Storage Facility files (DSF) - https://en.wikipedia.org/wiki/Direct_Stream_Digital
				'dsf'  => array(
							'pattern'   => '^DSD ',  // including trailing space: 44 53 44 20
							'group'     => 'audio',
							'module'    => 'dsf',
							'mime_type' => 'audio/dsd',
						),

// DSS  - audio       - Digital Speech Standard
				'dss'  => array(
							'pattern'   => '^[\\x02-\\x08]ds[s2]',
							'group'     => 'audio',
							'module'    => 'dss',
							'mime_type' => 'application/octet-stream',
						),

// DSDIFF - audio     - Direct Stream Digital Interchange File Format
				'dsdiff' => array(
							'pattern'   => '^FRM8',
							'group'     => 'audio',
							'module'    => 'dsdiff',
							'mime_type' => 'audio/dsd',
						),

// DTS  - audio       - Dolby Theatre System
				'dts'  => array(
							'pattern'   => '^\\x7F\\xFE\\x80\\x01',
							'group'     => 'audio',
							'module'    => 'dts',
							'mime_type' => 'audio/dts',
						),

// FLAC - audio       - Free Lossless Audio Codec
				'flac' => array(
							'pattern'   => '^fLaC',
							'group'     => 'audio',
							'module'    => 'flac',
							'mime_type' => 'audio/flac',
						),

// LA   - audio       - Lossless Audio (LA)
				'la'   => array(
							'pattern'   => '^LA0[2-4]',
							'group'     => 'audio',
							'module'    => 'la',
							'mime_type' => 'application/octet-stream',
						),

// LPAC - audio       - Lossless Predictive Audio Compression (LPAC)
				'lpac' => array(
							'pattern'   => '^LPAC',
							'group'     => 'audio',
							'module'    => 'lpac',
							'mime_type' => 'application/octet-stream',
						),

// MIDI - audio       - MIDI (Musical Instrument Digital Interface)
				'midi' => array(
							'pattern'   => '^MThd',
							'group'     => 'audio',
							'module'    => 'midi',
							'mime_type' => 'audio/midi',
						),

// MAC  - audio       - Monkey's Audio Compressor
				'mac'  => array(
							'pattern'   => '^MAC ',
							'group'     => 'audio',
							'module'    => 'monkey',
							'mime_type' => 'audio/x-monkeys-audio',
						),

// MOD  - audio       - MODule (SoundTracker)
				'mod'  => array(
							//'pattern'   => '^.{1080}(M\\.K\\.|M!K!|FLT4|FLT8|[5-9]CHN|[1-3][0-9]CH)', // has been known to produce false matches in random files (e.g. JPEGs), leave out until more precise matching available
							'pattern'   => '^.{1080}(M\\.K\\.)',
							'group'     => 'audio',
							'module'    => 'mod',
							'option'    => 'mod',
							'mime_type' => 'audio/mod',
						),

// MOD  - audio       - MODule (Impulse Tracker)
				'it'   => array(
							'pattern'   => '^IMPM',
							'group'     => 'audio',
							'module'    => 'mod',
							//'option'    => 'it',
							'mime_type' => 'audio/it',
						),

// MOD  - audio       - MODule (eXtended Module, various sub-formats)
				'xm'   => array(
							'pattern'   => '^Extended Module',
							'group'     => 'audio',
							'module'    => 'mod',
							//'option'    => 'xm',
							'mime_type' => 'audio/xm',
						),

// MOD  - audio       - MODule (ScreamTracker)
				's3m'  => array(
							'pattern'   => '^.{44}SCRM',
							'group'     => 'audio',
							'module'    => 'mod',
							//'option'    => 's3m',
							'mime_type' => 'audio/s3m',
						),

// MPC  - audio       - Musepack / MPEGplus
				'mpc'  => array(
							'pattern'   => '^(MPCK|MP\\+)',
							'group'     => 'audio',
							'module'    => 'mpc',
							'mime_type' => 'audio/x-musepack',
						),

// MP3  - audio       - MPEG-audio Layer 3 (very similar to AAC-ADTS)
				'mp3'  => array(
							'pattern'   => '^\\xFF[\\xE2-\\xE7\\xF2-\\xF7\\xFA-\\xFF][\\x00-\\x0B\\x10-\\x1B\\x20-\\x2B\\x30-\\x3B\\x40-\\x4B\\x50-\\x5B\\x60-\\x6B\\x70-\\x7B\\x80-\\x8B\\x90-\\x9B\\xA0-\\xAB\\xB0-\\xBB\\xC0-\\xCB\\xD0-\\xDB\\xE0-\\xEB\\xF0-\\xFB]',
							'group'     => 'audio',
							'module'    => 'mp3',
							'mime_type' => 'audio/mpeg',
						),

// OFR  - audio       - OptimFROG
				'ofr'  => array(
							'pattern'   => '^(\\*RIFF|OFR)',
							'group'     => 'audio',
							'module'    => 'optimfrog',
							'mime_type' => 'application/octet-stream',
						),

// RKAU - audio       - RKive AUdio compressor
				'rkau' => array(
							'pattern'   => '^RKA',
							'group'     => 'audio',
							'module'    => 'rkau',
							'mime_type' => 'application/octet-stream',
						),

// SHN  - audio       - Shorten
				'shn'  => array(
							'pattern'   => '^ajkg',
							'group'     => 'audio',
							'module'    => 'shorten',
							'mime_type' => 'audio/xmms-shn',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						),

// TAK  - audio       - Tom's lossless Audio Kompressor
				'tak'  => array(
							'pattern'   => '^tBaK',
							'group'     => 'audio',
							'module'    => 'tak',
							'mime_type' => 'application/octet-stream',
						),

// TTA  - audio       - TTA Lossless Audio Compressor (http://tta.corecodec.org)
				'tta'  => array(
							'pattern'   => '^TTA',  // could also be '^TTA(\\x01|\\x02|\\x03|2|1)'
							'group'     => 'audio',
							'module'    => 'tta',
							'mime_type' => 'application/octet-stream',
						),

// VOC  - audio       - Creative Voice (VOC)
				'voc'  => array(
							'pattern'   => '^Creative Voice File',
							'group'     => 'audio',
							'module'    => 'voc',
							'mime_type' => 'audio/voc',
						),

// VQF  - audio       - transform-domain weighted interleave Vector Quantization Format (VQF)
				'vqf'  => array(
							'pattern'   => '^TWIN',
							'group'     => 'audio',
							'module'    => 'vqf',
							'mime_type' => 'application/octet-stream',
						),

// WV  - audio        - WavPack (v4.0+)
				'wv'   => array(
							'pattern'   => '^wvpk',
							'group'     => 'audio',
							'module'    => 'wavpack',
							'mime_type' => 'application/octet-stream',
						),

// Audio-Video formats

// ASF  - audio/video - Advanced Streaming Format, Windows Media Video, Windows Media Audio
				'asf'  => array(
							'pattern'   => '^\\x30\\x26\\xB2\\x75\\x8E\\x66\\xCF\\x11\\xA6\\xD9\\x00\\xAA\\x00\\x62\\xCE\\x6C',
							'group'     => 'audio-video',
							'module'    => 'asf',
							'mime_type' => 'video/x-ms-asf',
							'iconv_req' => false,
						),

// BINK - audio/video - Bink / Smacker
				'bink' => array(
							'pattern'   => '^(BIK|SMK)',
							'group'     => 'audio-video',
							'module'    => 'bink',
							'mime_type' => 'application/octet-stream',
						),

// FLV  - audio/video - FLash Video
				'flv' => array(
							'pattern'   => '^FLV[\\x01]',
							'group'     => 'audio-video',
							'module'    => 'flv',
							'mime_type' => 'video/x-flv',
						),

// IVF - audio/video - IVF
				'ivf' => array(
							'pattern'   => '^DKIF',
							'group'     => 'audio-video',
							'module'    => 'ivf',
							'mime_type' => 'video/x-ivf',
						),

// MKAV - audio/video - Mastroka
				'matroska' => array(
							'pattern'   => '^\\x1A\\x45\\xDF\\xA3',
							'group'     => 'audio-video',
							'module'    => 'matroska',
							'mime_type' => 'video/x-matroska', // may also be audio/x-matroska
						),

// MPEG - audio/video - MPEG (Moving Pictures Experts Group)
				'mpeg' => array(
							'pattern'   => '^\\x00\\x00\\x01[\\xB3\\xBA]',
							'group'     => 'audio-video',
							'module'    => 'mpeg',
							'mime_type' => 'video/mpeg',
						),

// NSV  - audio/video - Nullsoft Streaming Video (NSV)
				'nsv'  => array(
							'pattern'   => '^NSV[sf]',
							'group'     => 'audio-video',
							'module'    => 'nsv',
							'mime_type' => 'application/octet-stream',
						),

// Ogg  - audio/video - Ogg (Ogg-Vorbis, Ogg-FLAC, Speex, Ogg-Theora(*), Ogg-Tarkin(*))
				'ogg'  => array(
							'pattern'   => '^OggS',
							'group'     => 'audio',
							'module'    => 'ogg',
							'mime_type' => 'application/ogg',
							'fail_id3'  => 'WARNING',
							'fail_ape'  => 'WARNING',
						),

// QT   - audio/video - Quicktime
				'quicktime' => array(
							'pattern'   => '^.{4}(cmov|free|ftyp|mdat|moov|pnot|skip|wide)',
							'group'     => 'audio-video',
							'module'    => 'quicktime',
							'mime_type' => 'video/quicktime',
						),

// RIFF - audio/video - Resource Interchange File Format (RIFF) / WAV / AVI / CD-audio / SDSS = renamed variant used by SmartSound QuickTracks (www.smartsound.com) / FORM = Audio Interchange File Format (AIFF)
				'riff' => array(
							'pattern'   => '^(RIFF|SDSS|FORM)',
							'group'     => 'audio-video',
							'module'    => 'riff',
							'mime_type' => 'audio/wav',
							'fail_ape'  => 'WARNING',
						),

// Real - audio/video - RealAudio, RealVideo
				'real' => array(
							'pattern'   => '^\\.(RMF|ra)',
							'group'     => 'audio-video',
							'module'    => 'real',
							'mime_type' => 'audio/x-realaudio',
						),

// SWF - audio/video - ShockWave Flash
				'swf' => array(
							'pattern'   => '^(F|C)WS',
							'group'     => 'audio-video',
							'module'    => 'swf',
							'mime_type' => 'application/x-shockwave-flash',
						),

// TS - audio/video - MPEG-2 Transport Stream
				'ts' => array(
							'pattern'   => '^(\\x47.{187}){10,}', // packets are 188 bytes long and start with 0x47 "G".  Check for at least 10 packets matching this pattern
							'group'     => 'audio-video',
							'module'    => 'ts',
							'mime_type' => 'video/MP2T',
						),

// WTV - audio/video - Windows Recorded TV Show
				'wtv' => array(
							'pattern'   => '^\\xB7\\xD8\\x00\\x20\\x37\\x49\\xDA\\x11\\xA6\\x4E\\x00\\x07\\xE9\\x5E\\xAD\\x8D',
							'group'     => 'audio-video',
							'module'    => 'wtv',
							'mime_type' => 'video/x-ms-wtv',
						),

// Still-Image formats

// BMP  - still image - Bitmap (Windows, OS/2; uncompressed, RLE8, RLE4)
				'bmp'  => array(
							'pattern'   => '^BM',
							'group'     => 'graphic',
							'module'    => 'bmp',
							'mime_type' => 'image/bmp',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						),

// GIF  - still image - Graphics Interchange Format
				'gif'  => array(
							'pattern'   => '^GIF',
							'group'     => 'graphic',
							'module'    => 'gif',
							'mime_type' => 'image/gif',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						),

// JPEG - still image - Joint Photographic Experts Group (JPEG)
				'jpg'  => array(
							'pattern'   => '^\\xFF\\xD8\\xFF',
							'group'     => 'graphic',
							'module'    => 'jpg',
							'mime_type' => 'image/jpeg',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						),

// PCD  - still image - Kodak Photo CD
				'pcd'  => array(
							'pattern'   => '^.{2048}PCD_IPI\\x00',
							'group'     => 'graphic',
							'module'    => 'pcd',
							'mime_type' => 'image/x-photo-cd',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						),

// PNG  - still image - Portable Network Graphics (PNG)
				'png'  => array(
							'pattern'   => '^\\x89\\x50\\x4E\\x47\\x0D\\x0A\\x1A\\x0A',
							'group'     => 'graphic',
							'module'    => 'png',
							'mime_type' => 'image/png',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						),

// SVG  - still image - Scalable Vector Graphics (SVG)
				'svg'  => array(
							'pattern'   => '(<!DOCTYPE svg PUBLIC |xmlns="http://www\\.w3\\.org/2000/svg")',
							'group'     => 'graphic',
							'module'    => 'svg',
							'mime_type' => 'image/svg+xml',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						),

// TIFF - still image - Tagged Information File Format (TIFF)
				'tiff' => array(
							'pattern'   => '^(II\\x2A\\x00|MM\\x00\\x2A)',
							'group'     => 'graphic',
							'module'    => 'tiff',
							'mime_type' => 'image/tiff',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						),

// EFAX - still image - eFax (TIFF derivative)
				'efax'  => array(
							'pattern'   => '^\\xDC\\xFE',
							'group'     => 'graphic',
							'module'    => 'efax',
							'mime_type' => 'image/efax',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						),

// Data formats

// ISO  - data        - International Standards Organization (ISO) CD-ROM Image
				'iso'  => array(
							'pattern'   => '^.{32769}CD001',
							'group'     => 'misc',
							'module'    => 'iso',
							'mime_type' => 'application/octet-stream',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
							'iconv_req' => false,
						),

// HPK  - data        - HPK compressed data
				'hpk'  => array(
							'pattern'   => '^BPUL',
							'group'     => 'archive',
							'module'    => 'hpk',
							'mime_type' => 'application/octet-stream',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						),

// RAR  - data        - RAR compressed data
				'rar'  => array(
							'pattern'   => '^Rar\\!',
							'group'     => 'archive',
							'module'    => 'rar',
							'mime_type' => 'application/vnd.rar',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						),

// SZIP - audio/data  - SZIP compressed data
				'szip' => array(
							'pattern'   => '^SZ\\x0A\\x04',
							'group'     => 'archive',
							'module'    => 'szip',
							'mime_type' => 'application/octet-stream',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						),

// TAR  - data        - TAR compressed data
				'tar'  => array(
							'pattern'   => '^.{100}[0-9\\x20]{7}\\x00[0-9\\x20]{7}\\x00[0-9\\x20]{7}\\x00[0-9\\x20\\x00]{12}[0-9\\x20\\x00]{12}',
							'group'     => 'archive',
							'module'    => 'tar',
							'mime_type' => 'application/x-tar',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						),

// GZIP  - data        - GZIP compressed data
				'gz'  => array(
							'pattern'   => '^\\x1F\\x8B\\x08',
							'group'     => 'archive',
							'module'    => 'gzip',
							'mime_type' => 'application/gzip',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						),

// ZIP  - data         - ZIP compressed data
				'zip'  => array(
							'pattern'   => '^PK\\x03\\x04',
							'group'     => 'archive',
							'module'    => 'zip',
							'mime_type' => 'application/zip',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						),

// XZ   - data         - XZ compressed data
				'xz'  => array(
							'pattern'   => '^\\xFD7zXZ\\x00',
							'group'     => 'archive',
							'module'    => 'xz',
							'mime_type' => 'application/x-xz',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						),

// XZ   - data         - XZ compressed data
				'7zip'  => array(
							'pattern'   => '^7z\\xBC\\xAF\\x27\\x1C',
							'group'     => 'archive',
							'module'    => '7zip',
							'mime_type' => 'application/x-7z-compressed',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						),

// Misc other formats

// GPX - data         - GPS Exchange Format
				'gpx' => array (
							'pattern'   => '^<\\?xml [^>]+>[\s]*<gpx ',
							'group'     => 'misc',
							'module'    => 'gpx',
							'mime_type' => 'application/gpx+xml',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						),

// PAR2 - data        - Parity Volume Set Specification 2.0
				'par2' => array (
							'pattern'   => '^PAR2\\x00PKT',
							'group'     => 'misc',
							'module'    => 'par2',
							'mime_type' => 'application/octet-stream',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						),

// PDF  - data        - Portable Document Format
				'pdf'  => array(
							'pattern'   => '^\\x25PDF',
							'group'     => 'misc',
							'module'    => 'pdf',
							'mime_type' => 'application/pdf',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						),

// MSOFFICE  - data   - ZIP compressed data
				'msoffice' => array(
							'pattern'   => '^\\xD0\\xCF\\x11\\xE0\\xA1\\xB1\\x1A\\xE1', // D0CF11E == DOCFILE == Microsoft Office Document
							'group'     => 'misc',
							'module'    => 'msoffice',
							'mime_type' => 'application/octet-stream',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						),

// TORRENT             - .torrent
				'torrent' => array(
							'pattern'   => '^(d8\\:announce|d7\\:comment)',
							'group'     => 'misc',
							'module'    => 'torrent',
							'mime_type' => 'application/x-bittorrent',
							'fail_id3'  => 'ERROR',
							'fail_ape'  => 'ERROR',
						),

// CUE  - data       - CUEsheet (index to single-file disc images)
				 'cue' => array(
							'pattern'   => '', // empty pattern means cannot be automatically detected, will fall through all other formats and match based on filename and very basic file contents
							'group'     => 'misc',
							'module'    => 'cue',
							'mime_type' => 'application/octet-stream',
						   ),

);
		}

return $format_info;
	}

/**
	 * @param string $filedata
	 * @param string $filename
	 *
	 * @return mixed|false
	 */
	public function GetFileFormat(&$filedata, $filename='') {
		// this function will determine the format of a file based on usually
		// the first 2-4 bytes of the file (8 bytes for PNG, 16 bytes for JPG,
		// and in the case of ISO CD image, 6 bytes offset 32kb from the start
		// of the file).

// Identify file format - loop through $format_info and detect with reg expr
		foreach ($this->GetFileFormatArray() as $format_name => $info) {
			// The /s switch on preg_match() forces preg_match() NOT to treat
			// newline (0x0A) characters as special chars but do a binary match
			if (!empty($info['pattern']) && preg_match('#'.$info['pattern'].'#s', $filedata)) {
				$info['include'] = 'module.'.$info['group'].'.'.$info['module'].'.php';
				return $info;
			}
		}

if (preg_match('#\\.mp[123a]$#i', $filename)) {
			// Too many mp3 encoders on the market put garbage in front of mpeg files
			// use assume format on these if format detection failed
			$GetFileFormatArray = $this->GetFileFormatArray();
			$info = $GetFileFormatArray['mp3'];
			$info['include'] = 'module.'.$info['group'].'.'.$info['module'].'.php';
			return $info;
		} elseif (preg_match('#\\.mp[cp\\+]$#i', $filename) && preg_match('#[\x00\x01\x10\x11\x40\x41\x50\x51\x80\x81\x90\x91\xC0\xC1\xD0\xD1][\x20-37][\x00\x20\x40\x60\x80\xA0\xC0\xE0]#s', $filedata)) {
			// old-format (SV4-SV6) Musepack header that has a very loose pattern match and could falsely match other data (e.g. corrupt mp3)
			// only enable this pattern check if the filename ends in .mpc/mpp/mp+
			$GetFileFormatArray = $this->GetFileFormatArray();
			$info = $GetFileFormatArray['mpc'];
			$info['include'] = 'module.'.$info['group'].'.'.$info['module'].'.php';
			return $info;
		} elseif (preg_match('#\\.cue$#i', $filename) && preg_match('#FILE "[^"]+" (BINARY|MOTOROLA|AIFF|WAVE|MP3)#', $filedata)) {
			// there's not really a useful consistent "magic" at the beginning of .cue files to identify them
			// so until I think of something better, just go by filename if all other format checks fail
			// and verify there's at least one instance of "TRACK xx AUDIO" in the file
			$GetFileFormatArray = $this->GetFileFormatArray();
			$info = $GetFileFormatArray['cue'];
			$info['include']   = 'module.'.$info['group'].'.'.$info['module'].'.php';
			return $info;
		}

return false;
	}

/**
	 * Converts array to $encoding charset from $this->encoding.
	 *
	 * @param array  $array
	 * @param string $encoding
	 */
	public function CharConvert(&$array, $encoding) {

// identical encoding - end here
		if ($encoding == $this->encoding) {
			return;
		}

// loop thru array
		foreach ($array as $key => $value) {

// go recursive
			if (is_array($value)) {
				$this->CharConvert($array[$key], $encoding);
			}

// convert string
			elseif (is_string($value)) {
				$array[$key] = trim(getid3_lib::iconv_fallback($encoding, $this->encoding, $value));
			}
		}
	}

/**
	 * @return bool
	 */
	public function HandleAllTags() {

// key name => array (tag name, character encoding)
		static $tags;
		if (empty($tags)) {
			$tags = array(
				'asf'       => array('asf'           , 'UTF-16LE'),
				'midi'      => array('midi'          , 'ISO-8859-1'),
				'nsv'       => array('nsv'           , 'ISO-8859-1'),
				'ogg'       => array('vorbiscomment' , 'UTF-8'),
				'png'       => array('png'           , 'UTF-8'),
				'tiff'      => array('tiff'          , 'ISO-8859-1'),
				'quicktime' => array('quicktime'     , 'UTF-8'),
				'real'      => array('real'          , 'ISO-8859-1'),
				'vqf'       => array('vqf'           , 'ISO-8859-1'),
				'zip'       => array('zip'           , 'ISO-8859-1'),
				'riff'      => array('riff'          , 'ISO-8859-1'),
				'lyrics3'   => array('lyrics3'       , 'ISO-8859-1'),
				'id3v1'     => array('id3v1'         , $this->encoding_id3v1),
				'id3v2'     => array('id3v2'         , 'UTF-8'), // not according to the specs (every frame can have a different encoding), but getID3() force-converts all encodings to UTF-8
				'ape'       => array('ape'           , 'UTF-8'),
				'cue'       => array('cue'           , 'ISO-8859-1'),
				'matroska'  => array('matroska'      , 'UTF-8'),
				'flac'      => array('vorbiscomment' , 'UTF-8'),
				'divxtag'   => array('divx'          , 'ISO-8859-1'),
				'iptc'      => array('iptc'          , 'ISO-8859-1'),
				'dsdiff'    => array('dsdiff'        , 'ISO-8859-1'),
			);
		}

// loop through comments array
		foreach ($tags as $comment_name => $tagname_encoding_array) {
			list($tag_name, $encoding) = $tagname_encoding_array;

// fill in default encoding type if not already present
			if (isset($this->info[$comment_name]) && !isset($this->info[$comment_name]['encoding'])) {
				$this->info[$comment_name]['encoding'] = $encoding;
			}

// copy comments if key name set
			if (!empty($this->info[$comment_name]['comments'])) {
				foreach ($this->info[$comment_name]['comments'] as $tag_key => $valuearray) {
					foreach ($valuearray as $key => $value) {
						if (is_string($value)) {
							$value = trim($value, " \r\n\t"); // do not trim nulls from $value!! Unicode characters will get mangled if trailing nulls are removed!
						}
						if (isset($value) && $value !== "") {
							if (!is_numeric($key)) {
								$this->info['tags'][trim($tag_name)][trim($tag_key)][$key] = $value;
							} else {
								$this->info['tags'][trim($tag_name)][trim($tag_key)][]     = $value;
							}
						}
					}
					if ($tag_key == 'picture') {
						// pictures can take up a lot of space, and we don't need multiple copies of them; let there be a single copy in [comments][picture], and not elsewhere
						unset($this->info[$comment_name]['comments'][$tag_key]);
					}
				}

if (!isset($this->info['tags'][$tag_name])) {
					// comments are set but contain nothing but empty strings, so skip
					continue;
				}

$this->CharConvert($this->info['tags'][$tag_name], $this->info[$comment_name]['encoding']);           // only copy gets converted!

if ($this->option_tags_html) {
					foreach ($this->info['tags'][$tag_name] as $tag_key => $valuearray) {
						if ($tag_key == 'picture') {
							// Do not to try to convert binary picture data to HTML
							// https://github.com/JamesHeinrich/getID3/issues/178
							continue;
						}
						$this->info['tags_html'][$tag_name][$tag_key] = getid3_lib::recursiveMultiByteCharString2HTML($valuearray, $this->info[$comment_name]['encoding']);
					}
				}

}

// pictures can take up a lot of space, and we don't need multiple copies of them; let there be a single copy in [comments][picture], and not elsewhere
		if (!empty($this->info['tags'])) {
			$unset_keys = array('tags', 'tags_html');
			foreach ($this->info['tags'] as $tagtype => $tagarray) {
				foreach ($tagarray as $tagname => $tagdata) {
					if ($tagname == 'picture') {
						foreach ($tagdata as $key => $tagarray) {
							$this->info['comments']['picture'][] = $tagarray;
							if (isset($tagarray['data']) && isset($tagarray['image_mime'])) {
								if (isset($this->info['tags'][$tagtype][$tagname][$key])) {
									unset($this->info['tags'][$tagtype][$tagname][$key]);
								}
								if (isset($this->info['tags_html'][$tagtype][$tagname][$key])) {
									unset($this->info['tags_html'][$tagtype][$tagname][$key]);
								}
							}
						}
					}
				}
				foreach ($unset_keys as $unset_key) {
					// remove possible empty keys from (e.g. [tags][id3v2][picture])
					if (empty($this->info[$unset_key][$tagtype]['picture'])) {
						unset($this->info[$unset_key][$tagtype]['picture']);
					}
					if (empty($this->info[$unset_key][$tagtype])) {
						unset($this->info[$unset_key][$tagtype]);
					}
					if (empty($this->info[$unset_key])) {
						unset($this->info[$unset_key]);
					}
				}
				// remove duplicate copy of picture data from (e.g. [id3v2][comments][picture])
				if (isset($this->info[$tagtype]['comments']['picture'])) {
					unset($this->info[$tagtype]['comments']['picture']);
				}
				if (empty($this->info[$tagtype]['comments'])) {
					unset($this->info[$tagtype]['comments']);
				}
				if (empty($this->info[$tagtype])) {
					unset($this->info[$tagtype]);
				}
			}
		}
		return true;
	}

/**
	 * Calls getid3_lib::CopyTagsToComments() but passes in the option_tags_html setting from this instance of getID3
	 *
	 * @param array $ThisFileInfo
	 *
	 * @return bool
	 */
	public function CopyTagsToComments(&$ThisFileInfo) {
	    return getid3_lib::CopyTagsToComments($ThisFileInfo, $this->option_tags_html);
	}

/**
	 * @param string $algorithm
	 *
	 * @return array|bool
	 */
	public function getHashdata($algorithm) {
		switch ($algorithm) {
			case 'md5':
			case 'sha1':
				break;

default:
				return $this->error('bad algorithm "'.$algorithm.'" in getHashdata()');
		}

if (!empty($this->info['fileformat']) && !empty($this->info['dataformat']) && ($this->info['fileformat'] == 'ogg') && ($this->info['audio']['dataformat'] == 'vorbis')) {

// We cannot get an identical md5_data value for Ogg files where the comments
			// span more than 1 Ogg page (compared to the same audio data with smaller
			// comments) using the normal getID3() method of MD5'ing the data between the
			// end of the comments and the end of the file (minus any trailing tags),
			// because the page sequence numbers of the pages that the audio data is on
			// do not match. Under normal circumstances, where comments are smaller than
			// the nominal 4-8kB page size, then this is not a problem, but if there are
			// very large comments, the only way around it is to strip off the comment
			// tags with vorbiscomment and MD5 that file.
			// This procedure must be applied to ALL Ogg files, not just the ones with
			// comments larger than 1 page, because the below method simply MD5's the
			// whole file with the comments stripped, not just the portion after the
			// comments block (which is the standard getID3() method.

// The above-mentioned problem of comments spanning multiple pages and changing
			// page sequence numbers likely happens for OggSpeex and OggFLAC as well, but
			// currently vorbiscomment only works on OggVorbis files.

if (preg_match('#(1|ON)#i', ini_get('safe_mode'))) {

$this->warning('Failed making system call to vorbiscomment.exe - '.$algorithm.'_data is incorrect - error returned: PHP running in Safe Mode (backtick operator not available)');
				$this->info[$algorithm.'_data'] = false;

} else {

// Prevent user from aborting script
				$old_abort = ignore_user_abort(true);

// Create empty file
				$empty = tempnam(GETID3_TEMP_DIR, 'getID3');
				touch($empty);

// Use vorbiscomment to make temp file without comments
				$temp = tempnam(GETID3_TEMP_DIR, 'getID3');
				$file = $this->info['filenamepath'];

if (GETID3_OS_ISWINDOWS) {

if (file_exists(GETID3_HELPERAPPSDIR.'vorbiscomment.exe')) {

$commandline = '"'.GETID3_HELPERAPPSDIR.'vorbiscomment.exe" -w -c "'.$empty.'" "'.$file.'" "'.$temp.'"';
						$VorbisCommentError = shell_exec($commandline);

} else {

$VorbisCommentError = 'vorbiscomment.exe not found in '.GETID3_HELPERAPPSDIR;

}

} else {

$commandline = 'vorbiscomment -w -c '.escapeshellarg($empty).' '.escapeshellarg($file).' '.escapeshellarg($temp).' 2>&1';
					$VorbisCommentError = shell_exec($commandline);

}

if (!empty($VorbisCommentError)) {

$this->warning('Failed making system call to vorbiscomment(.exe) - '.$algorithm.'_data will be incorrect. If vorbiscomment is unavailable, please download from http://www.vorbis.com/download.psp and put in the getID3() directory. Error returned: '.$VorbisCommentError);
					$this->info[$algorithm.'_data'] = false;

} else {

// Get hash of newly created file
					switch ($algorithm) {
						case 'md5':
							$this->info[$algorithm.'_data'] = md5_file($temp);
							break;

case 'sha1':
							$this->info[$algorithm.'_data'] = sha1_file($temp);
							break;
					}
				}

// Clean up
				unlink($empty);
				unlink($temp);

// Reset abort setting
				ignore_user_abort($old_abort);

}

} else {

if (!empty($this->info['avdataoffset']) || (isset($this->info['avdataend']) && ($this->info['avdataend'] < $this->info['filesize']))) {

// get hash from part of file
				$this->info[$algorithm.'_data'] = getid3_lib::hash_data($this->info['filenamepath'], $this->info['avdataoffset'], $this->info['avdataend'], $algorithm);

} else {

// get hash from whole file
				switch ($algorithm) {
					case 'md5':
						$this->info[$algorithm.'_data'] = md5_file($this->info['filenamepath']);
						break;

case 'sha1':
						$this->info[$algorithm.'_data'] = sha1_file($this->info['filenamepath']);
						break;
				}
			}

}
		return true;
	}

public function ChannelsBitratePlaytimeCalculations() {

// set channelmode on audio
		if (!empty($this->info['audio']['channelmode']) || !isset($this->info['audio']['channels'])) {
			// ignore
		} elseif ($this->info['audio']['channels'] == 1) {
			$this->info['audio']['channelmode'] = 'mono';
		} elseif ($this->info['audio']['channels'] == 2) {
			$this->info['audio']['channelmode'] = 'stereo';
		}

// Calculate combined bitrate - audio + video
		$CombinedBitrate  = 0;
		$CombinedBitrate += (isset($this->info['audio']['bitrate']) && ($this->info['audio']['bitrate'] != 'free') ? $this->info['audio']['bitrate'] : 0);
		$CombinedBitrate += (isset($this->info['video']['bitrate'])                                                ? $this->info['video']['bitrate'] : 0);
		if (($CombinedBitrate > 0) && empty($this->info['bitrate'])) {
			$this->info['bitrate'] = $CombinedBitrate;
		}
		//if ((isset($this->info['video']) && !isset($this->info['video']['bitrate'])) || (isset($this->info['audio']) && !isset($this->info['audio']['bitrate']))) {
		//	// for example, VBR MPEG video files cannot determine video bitrate:
		//	// should not set overall bitrate and playtime from audio bitrate only
		//	unset($this->info['bitrate']);
		//}

// video bitrate undetermined, but calculable
		if (isset($this->info['video']['dataformat']) && $this->info['video']['dataformat'] && (!isset($this->info['video']['bitrate']) || ($this->info['video']['bitrate'] == 0))) {
			// if video bitrate not set
			if (isset($this->info['audio']['bitrate']) && ($this->info['audio']['bitrate'] > 0) && ($this->info['audio']['bitrate'] == $this->info['bitrate'])) {
				// AND if audio bitrate is set to same as overall bitrate
				if (isset($this->info['playtime_seconds']) && ($this->info['playtime_seconds'] > 0)) {
					// AND if playtime is set
					if (isset($this->info['avdataend']) && isset($this->info['avdataoffset'])) {
						// AND if AV data offset start/end is known
						// THEN we can calculate the video bitrate
						$this->info['bitrate'] = round((($this->info['avdataend'] - $this->info['avdataoffset']) * 8) / $this->info['playtime_seconds']);
						$this->info['video']['bitrate'] = $this->info['bitrate'] - $this->info['audio']['bitrate'];
					}
				}
			}
		}

if ((!isset($this->info['playtime_seconds']) || ($this->info['playtime_seconds'] <= 0)) && !empty($this->info['bitrate'])) {
			$this->info['playtime_seconds'] = (($this->info['avdataend'] - $this->info['avdataoffset']) * 8) / $this->info['bitrate'];
		}

if (!isset($this->info['bitrate']) && !empty($this->info['playtime_seconds'])) {
			$this->info['bitrate'] = (($this->info['avdataend'] - $this->info['avdataoffset']) * 8) / $this->info['playtime_seconds'];
		}
		if (isset($this->info['bitrate']) && empty($this->info['audio']['bitrate']) && empty($this->info['video']['bitrate'])) {
			if (isset($this->info['audio']['dataformat']) && empty($this->info['video']['resolution_x'])) {
				// audio only
				$this->info['audio']['bitrate'] = $this->info['bitrate'];
			} elseif (isset($this->info['video']['resolution_x']) && empty($this->info['audio']['dataformat'])) {
				// video only
				$this->info['video']['bitrate'] = $this->info['bitrate'];
			}
		}

// Set playtime string
		if (!empty($this->info['playtime_seconds']) && empty($this->info['playtime_string'])) {
			$this->info['playtime_string'] = getid3_lib::PlaytimeString($this->info['playtime_seconds']);
		}
	}

/**
	 * @return bool
	 */
	public function CalculateCompressionRatioVideo() {
		if (empty($this->info['video'])) {
			return false;
		}
		if (empty($this->info['video']['resolution_x']) || empty($this->info['video']['resolution_y'])) {
			return false;
		}
		if (empty($this->info['video']['bits_per_sample'])) {
			return false;
		}

switch ($this->info['video']['dataformat']) {
			case 'bmp':
			case 'gif':
			case 'jpeg':
			case 'jpg':
			case 'png':
			case 'tiff':
				$FrameRate = 1;
				$PlaytimeSeconds = 1;
				$BitrateCompressed = $this->info['filesize'] * 8;
				break;

default:
				if (!empty($this->info['video']['frame_rate'])) {
					$FrameRate = $this->info['video']['frame_rate'];
				} else {
					return false;
				}
				if (!empty($this->info['playtime_seconds'])) {
					$PlaytimeSeconds = $this->info['playtime_seconds'];
				} else {
					return false;
				}
				if (!empty($this->info['video']['bitrate'])) {
					$BitrateCompressed = $this->info['video']['bitrate'];
				} else {
					return false;
				}
				break;
		}
		$BitrateUncompressed = $this->info['video']['resolution_x'] * $this->info['video']['resolution_y'] * $this->info['video']['bits_per_sample'] * $FrameRate;

$this->info['video']['compression_ratio'] = getid3_lib::SafeDiv($BitrateCompressed, $BitrateUncompressed, 1);
		return true;
	}

/**
	 * @return bool
	 */
	public function CalculateCompressionRatioAudio() {
		if (empty($this->info['audio']['bitrate']) || empty($this->info['audio']['channels']) || empty($this->info['audio']['sample_rate']) || !is_numeric($this->info['audio']['sample_rate'])) {
			return false;
		}
		if ($this->info['audio']['bitrate'] != 'free') {
			$this->info['audio']['compression_ratio'] = $this->info['audio']['bitrate'] / ($this->info['audio']['channels'] * $this->info['audio']['sample_rate'] * (!empty($this->info['audio']['bits_per_sample']) ? $this->info['audio']['bits_per_sample'] : 16));
		}

if (!empty($this->info['audio']['streams'])) {
			foreach ($this->info['audio']['streams'] as $streamnumber => $streamdata) {
				if (!empty($streamdata['bitrate']) && !empty($streamdata['channels']) && !empty($streamdata['sample_rate'])) {
					$this->info['audio']['streams'][$streamnumber]['compression_ratio'] = $streamdata['bitrate'] / ($streamdata['channels'] * $streamdata['sample_rate'] * (!empty($streamdata['bits_per_sample']) ? $streamdata['bits_per_sample'] : 16));
				}
			}
		}
		return true;
	}

/**
	 * @return bool
	 */
	public function CalculateReplayGain() {
		if (isset($this->info['replay_gain'])) {
			if (!isset($this->info['replay_gain']['reference_volume'])) {
				$this->info['replay_gain']['reference_volume'] = 89.0;
			}
			if (isset($this->info['replay_gain']['track']['adjustment'])) {
				$this->info['replay_gain']['track']['volume'] = $this->info['replay_gain']['reference_volume'] - $this->info['replay_gain']['track']['adjustment'];
			}
			if (isset($this->info['replay_gain']['album']['adjustment'])) {
				$this->info['replay_gain']['album']['volume'] = $this->info['replay_gain']['reference_volume'] - $this->info['replay_gain']['album']['adjustment'];
			}

if (isset($this->info['replay_gain']['track']['peak'])) {
				$this->info['replay_gain']['track']['max_noclip_gain'] = 0 - getid3_lib::RGADamplitude2dB($this->info['replay_gain']['track']['peak']);
			}
			if (isset($this->info['replay_gain']['album']['peak'])) {
				$this->info['replay_gain']['album']['max_noclip_gain'] = 0 - getid3_lib::RGADamplitude2dB($this->info['replay_gain']['album']['peak']);
			}
		}
		return true;
	}

/**
	 * @return bool
	 */
	public function ProcessAudioStreams() {
		if (!empty($this->info['audio']['bitrate']) || !empty($this->info['audio']['channels']) || !empty($this->info['audio']['sample_rate'])) {
			if (!isset($this->info['audio']['streams'])) {
				foreach ($this->info['audio'] as $key => $value) {
					if ($key != 'streams') {
						$this->info['audio']['streams'][0][$key] = $value;
					}
				}
			}
		}
		return true;
	}

/**
	 * @return string|bool
	 */
	public function getid3_tempnam() {
		return tempnam($this->tempdir, 'gI3');
	}

/**
	 * @param string $name
	 *
	 * @return bool
	 *
	 * @throws getid3_exception
	 */
	public function include_module($name) {
		//if (!file_exists($this->include_path.'module.'.$name.'.php')) {
		if (!file_exists(GETID3_INCLUDEPATH.'module.'.$name.'.php')) {
			throw new getid3_exception('Required module.'.$name.'.php is missing.');
		}
		include_once(GETID3_INCLUDEPATH.'module.'.$name.'.php');
		return true;
	}

/**
	 * @param string $filename
	 *
	 * @return bool
	 */
	public static function is_writable ($filename) {
		$ret = is_writable($filename);
		if (!$ret) {
			$perms = fileperms($filename);
			$ret = ($perms & 0x0080) || ($perms & 0x0010) || ($perms & 0x0002);
		}
		return $ret;
	}

}

abstract class getid3_handler
{

/**
	* @var getID3
	*/
	protected $getid3;                       // pointer

/**
	 * Analyzing filepointer or string.
	 *
	 * @var bool
	 */
	protected $data_string_flag     = false;

/**
	 * String to analyze.
	 *
	 * @var string
	 */
	protected $data_string          = '';

/**
	 * Seek position in string.
	 *
	 * @var int
	 */
	protected $data_string_position = 0;

/**
	 * String length.
	 *
	 * @var int
	 */
	protected $data_string_length   = 0;

/**
	 * @var string
	 */
	private $dependency_to;

/**
	 * getid3_handler constructor.
	 *
	 * @param getID3 $getid3
	 * @param string $call_module
	 */
	public function __construct(getID3 $getid3, $call_module=null) {
		$this->getid3 = $getid3;

if ($call_module) {
			$this->dependency_to = str_replace('getid3_', '', $call_module);
		}
	}

/**
	 * Analyze from file pointer.
	 *
	 * @return bool
	 */
	abstract public function Analyze();

/**
	 * Analyze from string instead.
	 *
	 * @param string $string
	 */
	public function AnalyzeString($string) {
		// Enter string mode
		$this->setStringMode($string);

// Save info
		$saved_avdataoffset = $this->getid3->info['avdataoffset'];
		$saved_avdataend    = $this->getid3->info['avdataend'];
		$saved_filesize     = (isset($this->getid3->info['filesize']) ? $this->getid3->info['filesize'] : null); // may be not set if called as dependency without openfile() call

// Reset some info
		$this->getid3->info['avdataoffset'] = 0;
		$this->getid3->info['avdataend']    = $this->getid3->info['filesize'] = $this->data_string_length;

// Analyze
		$this->Analyze();

// Restore some info
		$this->getid3->info['avdataoffset'] = $saved_avdataoffset;
		$this->getid3->info['avdataend']    = $saved_avdataend;
		$this->getid3->info['filesize']     = $saved_filesize;

// Exit string mode
		$this->data_string_flag = false;
	}

/**
	 * @param string $string
	 */
	public function setStringMode($string) {
		$this->data_string_flag   = true;
		$this->data_string        = $string;
		$this->data_string_length = strlen($string);
	}

/**
	 * @phpstan-impure
	 *
	 * @return int|bool
	 */
	protected function ftell() {
		if ($this->data_string_flag) {
			return $this->data_string_position;
		}
		return ftell($this->getid3->fp);
	}

/**
	 * @param int $bytes
	 *
	 * @phpstan-impure
	 *
	 * @return string|false
	 *
	 * @throws getid3_exception
	 */
	protected function fread($bytes) {
		if ($this->data_string_flag) {
			$this->data_string_position += $bytes;
			return substr($this->data_string, $this->data_string_position - $bytes, $bytes);
		}
		if ($bytes == 0) {
			return '';
		} elseif ($bytes < 0) {
			throw new getid3_exception('cannot fread('.$bytes.' from '.$this->ftell().')', 10);
		}
		$pos = $this->ftell() + $bytes;
		if (!getid3_lib::intValueSupported($pos)) {
			throw new getid3_exception('cannot fread('.$bytes.' from '.$this->ftell().') because beyond PHP filesystem limit', 10);
		}

//return fread($this->getid3->fp, $bytes);
		/*
		* https://www.getid3.org/phpBB3/viewtopic.php?t=1930
		* "I found out that the root cause for the problem was how getID3 uses the PHP system function fread().
		* It seems to assume that fread() would always return as many bytes as were requested.
		* However, according the PHP manual (http://php.net/manual/en/function.fread.php), this is the case only with regular local files, but not e.g. with Linux pipes.
		* The call may return only part of the requested data and a new call is needed to get more."
		*/
		$contents = '';
		do {
			//if (($this->getid3->memory_limit > 0) && ($bytes > $this->getid3->memory_limit)) {
			if (($this->getid3->memory_limit > 0) && (($bytes / $this->getid3->memory_limit) > 0.99)) { // enable a more-fuzzy match to prevent close misses generating errors like "PHP Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 33554464 bytes)"
				throw new getid3_exception('cannot fread('.$bytes.' from '.$this->ftell().') that is more than available PHP memory ('.$this->getid3->memory_limit.')', 10);
			}
			$part = fread($this->getid3->fp, $bytes);
			$partLength  = strlen($part);
			$bytes      -= $partLength;
			$contents   .= $part;
		} while (($bytes > 0) && ($partLength > 0));
		return $contents;
	}

/**
	 * @param int $bytes
	 * @param int $whence
	 *
	 * @phpstan-impure
	 *
	 * @return int
	 *
	 * @throws getid3_exception
	 */
	protected function fseek($bytes, $whence=SEEK_SET) {
		if ($this->data_string_flag) {
			switch ($whence) {
				case SEEK_SET:
					$this->data_string_position = $bytes;
					break;

case SEEK_CUR:
					$this->data_string_position += $bytes;
					break;

case SEEK_END:
					$this->data_string_position = $this->data_string_length + $bytes;
					break;
			}
			return 0; // fseek returns 0 on success
		}

$pos = $bytes;
		if ($whence == SEEK_CUR) {
			$pos = $this->ftell() + $bytes;
		} elseif ($whence == SEEK_END) {
			$pos = $this->getid3->info['filesize'] + $bytes;
		}
		if (!getid3_lib::intValueSupported($pos)) {
			throw new getid3_exception('cannot fseek('.$pos.') because beyond PHP filesystem limit', 10);
		}

// https://github.com/JamesHeinrich/getID3/issues/327
		$result = fseek($this->getid3->fp, $bytes, $whence);
		if ($result !== 0) { // fseek returns 0 on success
			throw new getid3_exception('cannot fseek('.$pos.'). resource/stream does not appear to support seeking', 10);
		}
		return $result;
	}

/**
	 * @phpstan-impure
	 *
	 * @return string|false
	 *
	 * @throws getid3_exception
	 */
	protected function fgets() {
		// must be able to handle CR/LF/CRLF but not read more than one lineend
		$buffer   = ''; // final string we will return
		$prevchar = ''; // save previously-read character for end-of-line checking
		if ($this->data_string_flag) {
			while (true) {
				$thischar = substr($this->data_string, $this->data_string_position++, 1);
				if (($prevchar == "\r") && ($thischar != "\n")) {
					// read one byte too many, back up
					$this->data_string_position--;
					break;
				}
				$buffer .= $thischar;
				if ($thischar == "\n") {
					break;
				}
				if ($this->data_string_position >= $this->data_string_length) {
					// EOF
					break;
				}
				$prevchar = $thischar;
			}

} else {

// Ideally we would just use PHP's fgets() function, however...
			// it does not behave consistently with regards to mixed line endings, may be system-dependent
			// and breaks entirely when given a file with mixed \r vs \n vs \r\n line endings (e.g. some PDFs)
			//return fgets($this->getid3->fp);
			while (true) {
				$thischar = fgetc($this->getid3->fp);
				if (($prevchar == "\r") && ($thischar != "\n")) {
					// read one byte too many, back up
					fseek($this->getid3->fp, -1, SEEK_CUR);
					break;
				}
				$buffer .= $thischar;
				if ($thischar == "\n") {
					break;
				}
				if (feof($this->getid3->fp)) {
					break;
				}
				$prevchar = $thischar;
			}

}
		return $buffer;
	}

/**
	 * @phpstan-impure
	 *
	 * @return bool
	 */
	protected function feof() {
		if ($this->data_string_flag) {
			return $this->data_string_position >= $this->data_string_length;
		}
		return feof($this->getid3->fp);
	}

/**
	 * @param string $module
	 *
	 * @return bool
	 */
	final protected function isDependencyFor($module) {
		return $this->dependency_to == $module;
	}

/**
	 * @param string $text
	 *
	 * @return bool
	 */
	protected function error($text) {
		$this->getid3->info['error'][] = $text;

return false;
	}

/**
	 * @param string $text
	 *
	 * @return bool
	 */
	protected function warning($text) {
		return $this->getid3->warning($text);
	}

/**
	 * @param string $text
	 */
	protected function notice($text) {
		// does nothing for now
	}

/**
	 * @param string $name
	 * @param int    $offset
	 * @param int    $length
	 * @param string $image_mime
	 *
	 * @return string|null
	 *
	 * @throws Exception
	 * @throws getid3_exception
	 */
	public function saveAttachment($name, $offset, $length, $image_mime=null) {
		$fp_dest = null;
		$dest = null;
		try {

// do not extract at all
			if ($this->getid3->option_save_attachments === getID3::ATTACHMENTS_NONE) {

$attachment = null; // do not set any

// extract to return array
			} elseif ($this->getid3->option_save_attachments === getID3::ATTACHMENTS_INLINE) {

$this->fseek($offset);
				$attachment = $this->fread($length); // get whole data in one pass, till it is anyway stored in memory
				if ($attachment === false || strlen($attachment) != $length) {
					throw new Exception('failed to read attachment data');
				}

// assume directory path is given
			} else {

// set up destination path
				$dir = rtrim(str_replace(array('/', '\\'), DIRECTORY_SEPARATOR, $this->getid3->option_save_attachments), DIRECTORY_SEPARATOR);
				if (!is_dir($dir) || !getID3::is_writable($dir)) { // check supplied directory
					throw new Exception('supplied path ('.$dir.') does not exist, or is not writable');
				}
				$dest = $dir.DIRECTORY_SEPARATOR.$name.($image_mime ? '.'.getid3_lib::ImageExtFromMime($image_mime) : '');

// create dest file
				if (($fp_dest = fopen($dest, 'wb')) == false) {
					throw new Exception('failed to create file '.$dest);
				}

// copy data
				$this->fseek($offset);
				$buffersize = ($this->data_string_flag ? $length : $this->getid3->fread_buffer_size());
				$bytesleft = $length;
				while ($bytesleft > 0) {
					if (($buffer = $this->fread(min($buffersize, $bytesleft))) === false || ($byteswritten = fwrite($fp_dest, $buffer)) === false || ($byteswritten === 0)) {
						throw new Exception($buffer === false ? 'not enough data to read' : 'failed to write to destination file, may be not enough disk space');
					}
					$bytesleft -= $byteswritten;
				}

fclose($fp_dest);
				$attachment = $dest;

}

} catch (Exception $e) {

// close and remove dest file if created
			if (isset($fp_dest) && is_resource($fp_dest)) {
				fclose($fp_dest);
			}

if (isset($dest) && file_exists($dest)) {
				unlink($dest);
			}

// do not set any is case of error
			$attachment = null;
			$this->warning('Failed to extract attachment '.$name.': '.$e->getMessage());

}

// seek to the end of attachment
		$this->fseek($offset + $length);

return $attachment;
	}

}

class getid3_exception extends Exception
{
	public $message;
}
��������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������license.txt�����������������������������������������������������������������������������������������0000644�����������������00000002564�15150061000�0006722 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org>               //
//  available at http://getid3.sourceforge.net                 //
//            or https://www.getid3.org                        //
//          also https://github.com/JamesHeinrich/getID3       //
/////////////////////////////////////////////////////////////////

*****************************************************************
*****************************************************************

getID3() is released under multiple licenses. You may choose
   from the following licenses, and use getID3 according to the
   terms of the license most suitable to your project.

GNU GPL: https://gnu.org/licenses/gpl.html                   (v3)
         https://gnu.org/licenses/old-licenses/gpl-2.0.html  (v2)
         https://gnu.org/licenses/old-licenses/gpl-1.0.html  (v1)

GNU LGPL: https://gnu.org/licenses/lgpl.html                 (v3)

Mozilla MPL: https://www.mozilla.org/MPL/2.0/                (v2)

getID3 Commercial License: https://www.getid3.org/#gCL
(no longer available, existing licenses remain valid)

*****************************************************************
*****************************************************************

Copies of each of the above licenses are included in the 'licenses'
directory of the getID3 distribution.
��������������������������������������������������������������������������������������������������������������������������������������������module.audio-video.flv.php��������������������������������������������������������������������������0000644�����������������00000064774�15150061000�0011542 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������<?php
/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org>               //
//  available at https://github.com/JamesHeinrich/getID3       //
//            or https://www.getid3.org                        //
//            or http://getid3.sourceforge.net                 //
//  see readme.txt for more details                            //
/////////////////////////////////////////////////////////////////
//                                                             //
// module.audio-video.flv.php                                  //
// module for analyzing Shockwave Flash Video files            //
// dependencies: NONE                                          //
//                                                             //
/////////////////////////////////////////////////////////////////
//                                                             //
//  FLV module by Seth Kaufman <sethØwhirl-i-gig*com>          //
//                                                             //
//  * version 0.1 (26 June 2005)                               //
//                                                             //
//  * version 0.1.1 (15 July 2005)                             //
//  minor modifications by James Heinrich <info@getid3.org>    //
//                                                             //
//  * version 0.2 (22 February 2006)                           //
//  Support for On2 VP6 codec and meta information             //
//    by Steve Webster <steve.websterØfeaturecreep*com>        //
//                                                             //
//  * version 0.3 (15 June 2006)                               //
//  Modified to not read entire file into memory               //
//    by James Heinrich <info@getid3.org>                      //
//                                                             //
//  * version 0.4 (07 December 2007)                           //
//  Bugfixes for incorrectly parsed FLV dimensions             //
//    and incorrect parsing of onMetaTag                       //
//    by Evgeny Moysevich <moysevichØgmail*com>                //
//                                                             //
//  * version 0.5 (21 May 2009)                                //
//  Fixed parsing of audio tags and added additional codec     //
//    details. The duration is now read from onMetaTag (if     //
//    exists), rather than parsing whole file                  //
//    by Nigel Barnes <ngbarnesØhotmail*com>                   //
//                                                             //
//  * version 0.6 (24 May 2009)                                //
//  Better parsing of files with h264 video                    //
//    by Evgeny Moysevich <moysevichØgmail*com>                //
//                                                             //
//  * version 0.6.1 (30 May 2011)                              //
//    prevent infinite loops in expGolombUe()                  //
//                                                             //
//  * version 0.7.0 (16 Jul 2013)                              //
//  handle GETID3_FLV_VIDEO_VP6FLV_ALPHA                       //
//  improved AVCSequenceParameterSetReader::readData()         //
//    by Xander Schouwerwou <schouwerwouØgmail*com>            //
//                                                            ///
/////////////////////////////////////////////////////////////////

if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
	exit;
}

define('GETID3_FLV_TAG_AUDIO',          8);
define('GETID3_FLV_TAG_VIDEO',          9);
define('GETID3_FLV_TAG_META',          18);

define('GETID3_FLV_VIDEO_H263',         2);
define('GETID3_FLV_VIDEO_SCREEN',       3);
define('GETID3_FLV_VIDEO_VP6FLV',       4);
define('GETID3_FLV_VIDEO_VP6FLV_ALPHA', 5);
define('GETID3_FLV_VIDEO_SCREENV2',     6);
define('GETID3_FLV_VIDEO_H264',         7);

define('H264_AVC_SEQUENCE_HEADER',          0);
define('H264_PROFILE_BASELINE',            66);
define('H264_PROFILE_MAIN',                77);
define('H264_PROFILE_EXTENDED',            88);
define('H264_PROFILE_HIGH',               100);
define('H264_PROFILE_HIGH10',             110);
define('H264_PROFILE_HIGH422',            122);
define('H264_PROFILE_HIGH444',            144);
define('H264_PROFILE_HIGH444_PREDICTIVE', 244);

class getid3_flv extends getid3_handler
{
	const magic = 'FLV';

/**
	 * Break out of the loop if too many frames have been scanned; only scan this
	 * many if meta frame does not contain useful duration.
	 *
	 * @var int
	 */
	public $max_frames = 100000;

/**
	 * @return bool
	 */
	public function Analyze() {
		$info = &$this->getid3->info;

$this->fseek($info['avdataoffset']);

$FLVdataLength = $info['avdataend'] - $info['avdataoffset'];
		$FLVheader = $this->fread(5);

$info['fileformat'] = 'flv';
		$info['flv']['header']['signature'] =                           substr($FLVheader, 0, 3);
		$info['flv']['header']['version']   = getid3_lib::BigEndian2Int(substr($FLVheader, 3, 1));
		$TypeFlags                          = getid3_lib::BigEndian2Int(substr($FLVheader, 4, 1));

if ($info['flv']['header']['signature'] != self::magic) {
			$this->error('Expecting "'.getid3_lib::PrintHexBytes(self::magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($info['flv']['header']['signature']).'"');
			unset($info['flv'], $info['fileformat']);
			return false;
		}

$info['flv']['header']['hasAudio'] = (bool) ($TypeFlags & 0x04);
		$info['flv']['header']['hasVideo'] = (bool) ($TypeFlags & 0x01);

$FrameSizeDataLength = getid3_lib::BigEndian2Int($this->fread(4));
		$FLVheaderFrameLength = 9;
		if ($FrameSizeDataLength > $FLVheaderFrameLength) {
			$this->fseek($FrameSizeDataLength - $FLVheaderFrameLength, SEEK_CUR);
		}
		$Duration = 0;
		$found_video = false;
		$found_audio = false;
		$found_meta  = false;
		$found_valid_meta_playtime = false;
		$tagParseCount = 0;
		$info['flv']['framecount'] = array('total'=>0, 'audio'=>0, 'video'=>0);
		$flv_framecount = &$info['flv']['framecount'];
		while ((($this->ftell() + 16) < $info['avdataend']) && (($tagParseCount++ <= $this->max_frames) || !$found_valid_meta_playtime))  {
			$ThisTagHeader = $this->fread(16);

$PreviousTagLength = getid3_lib::BigEndian2Int(substr($ThisTagHeader,  0, 4));
			$TagType           = getid3_lib::BigEndian2Int(substr($ThisTagHeader,  4, 1));
			$DataLength        = getid3_lib::BigEndian2Int(substr($ThisTagHeader,  5, 3));
			$Timestamp         = getid3_lib::BigEndian2Int(substr($ThisTagHeader,  8, 3));
			$LastHeaderByte    = getid3_lib::BigEndian2Int(substr($ThisTagHeader, 15, 1));
			$NextOffset = $this->ftell() - 1 + $DataLength;
			if ($Timestamp > $Duration) {
				$Duration = $Timestamp;
			}

$flv_framecount['total']++;
			switch ($TagType) {
				case GETID3_FLV_TAG_AUDIO:
					$flv_framecount['audio']++;
					if (!$found_audio) {
						$found_audio = true;
						$info['flv']['audio']['audioFormat']     = ($LastHeaderByte >> 4) & 0x0F;
						$info['flv']['audio']['audioRate']       = ($LastHeaderByte >> 2) & 0x03;
						$info['flv']['audio']['audioSampleSize'] = ($LastHeaderByte >> 1) & 0x01;
						$info['flv']['audio']['audioType']       =  $LastHeaderByte       & 0x01;
					}
					break;

case GETID3_FLV_TAG_VIDEO:
					$flv_framecount['video']++;
					if (!$found_video) {
						$found_video = true;
						$info['flv']['video']['videoCodec'] = $LastHeaderByte & 0x07;

$FLVvideoHeader = $this->fread(11);
						$PictureSizeEnc = array();

if ($info['flv']['video']['videoCodec'] == GETID3_FLV_VIDEO_H264) {
							// this code block contributed by: moysevichØgmail*com

$AVCPacketType = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 0, 1));
							if ($AVCPacketType == H264_AVC_SEQUENCE_HEADER) {
								//	read AVCDecoderConfigurationRecord
								$configurationVersion       = getid3_lib::BigEndian2Int(substr($FLVvideoHeader,  4, 1));
								$AVCProfileIndication       = getid3_lib::BigEndian2Int(substr($FLVvideoHeader,  5, 1));
								$profile_compatibility      = getid3_lib::BigEndian2Int(substr($FLVvideoHeader,  6, 1));
								$lengthSizeMinusOne         = getid3_lib::BigEndian2Int(substr($FLVvideoHeader,  7, 1));
								$numOfSequenceParameterSets = getid3_lib::BigEndian2Int(substr($FLVvideoHeader,  8, 1));

if (($numOfSequenceParameterSets & 0x1F) != 0) {
									//	there is at least one SequenceParameterSet
									//	read size of the first SequenceParameterSet
									//$spsSize = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 9, 2));
									$spsSize = getid3_lib::LittleEndian2Int(substr($FLVvideoHeader, 9, 2));
									//	read the first SequenceParameterSet
									$sps = $this->fread($spsSize);
									if (strlen($sps) == $spsSize) {	//	make sure that whole SequenceParameterSet was red
										$spsReader = new AVCSequenceParameterSetReader($sps);
										$spsReader->readData();
										$info['video']['resolution_x'] = $spsReader->getWidth();
										$info['video']['resolution_y'] = $spsReader->getHeight();
									}
								}
							}
							// end: moysevichØgmail*com

} elseif ($info['flv']['video']['videoCodec'] == GETID3_FLV_VIDEO_H263) {

$PictureSizeType = (getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 3, 2))) >> 7;
							$PictureSizeType = $PictureSizeType & 0x0007;
							$info['flv']['header']['videoSizeType'] = $PictureSizeType;
							switch ($PictureSizeType) {
								case 0:
									//$PictureSizeEnc = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 5, 2));
									//$PictureSizeEnc <<= 1;
									//$info['video']['resolution_x'] = ($PictureSizeEnc & 0xFF00) >> 8;
									//$PictureSizeEnc = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 6, 2));
									//$PictureSizeEnc <<= 1;
									//$info['video']['resolution_y'] = ($PictureSizeEnc & 0xFF00) >> 8;

$PictureSizeEnc['x'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 4, 2)) >> 7;
									$PictureSizeEnc['y'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 5, 2)) >> 7;
									$info['video']['resolution_x'] = $PictureSizeEnc['x'] & 0xFF;
									$info['video']['resolution_y'] = $PictureSizeEnc['y'] & 0xFF;
									break;

case 1:
									$PictureSizeEnc['x'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 4, 3)) >> 7;
									$PictureSizeEnc['y'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 6, 3)) >> 7;
									$info['video']['resolution_x'] = $PictureSizeEnc['x'] & 0xFFFF;
									$info['video']['resolution_y'] = $PictureSizeEnc['y'] & 0xFFFF;
									break;

case 2:
									$info['video']['resolution_x'] = 352;
									$info['video']['resolution_y'] = 288;
									break;

case 3:
									$info['video']['resolution_x'] = 176;
									$info['video']['resolution_y'] = 144;
									break;

case 4:
									$info['video']['resolution_x'] = 128;
									$info['video']['resolution_y'] = 96;
									break;

case 5:
									$info['video']['resolution_x'] = 320;
									$info['video']['resolution_y'] = 240;
									break;

case 6:
									$info['video']['resolution_x'] = 160;
									$info['video']['resolution_y'] = 120;
									break;

default:
									$info['video']['resolution_x'] = 0;
									$info['video']['resolution_y'] = 0;
									break;

}

} elseif ($info['flv']['video']['videoCodec'] ==  GETID3_FLV_VIDEO_VP6FLV_ALPHA) {

/* contributed by schouwerwouØgmail*com */
							if (!isset($info['video']['resolution_x'])) { // only when meta data isn't set
								$PictureSizeEnc['x'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 6, 2));
								$PictureSizeEnc['y'] = getid3_lib::BigEndian2Int(substr($FLVvideoHeader, 7, 2));
								$info['video']['resolution_x'] = ($PictureSizeEnc['x'] & 0xFF) << 3;
								$info['video']['resolution_y'] = ($PictureSizeEnc['y'] & 0xFF) << 3;
							}
							/* end schouwerwouØgmail*com */

}
						if (!empty($info['video']['resolution_x']) && !empty($info['video']['resolution_y'])) {
							$info['video']['pixel_aspect_ratio'] = $info['video']['resolution_x'] / $info['video']['resolution_y'];
						}
					}
					break;

// Meta tag
				case GETID3_FLV_TAG_META:
					if (!$found_meta) {
						$found_meta = true;
						$this->fseek(-1, SEEK_CUR);
						$datachunk = $this->fread($DataLength);
						$AMFstream = new AMFStream($datachunk);
						$reader = new AMFReader($AMFstream);
						$eventName = $reader->readData();
						$info['flv']['meta'][$eventName] = $reader->readData();
						unset($reader);

$copykeys = array('framerate'=>'frame_rate', 'width'=>'resolution_x', 'height'=>'resolution_y', 'audiodatarate'=>'bitrate', 'videodatarate'=>'bitrate');
						foreach ($copykeys as $sourcekey => $destkey) {
							if (isset($info['flv']['meta']['onMetaData'][$sourcekey])) {
								switch ($sourcekey) {
									case 'width':
									case 'height':
										$info['video'][$destkey] = intval(round($info['flv']['meta']['onMetaData'][$sourcekey]));
										break;
									case 'audiodatarate':
										$info['audio'][$destkey] = getid3_lib::CastAsInt(round($info['flv']['meta']['onMetaData'][$sourcekey] * 1000));
										break;
									case 'videodatarate':
									case 'frame_rate':
									default:
										$info['video'][$destkey] = $info['flv']['meta']['onMetaData'][$sourcekey];
										break;
								}
							}
						}
						if (!empty($info['flv']['meta']['onMetaData']['duration'])) {
							$found_valid_meta_playtime = true;
						}
					}
					break;

default:
					// noop
					break;
			}
			$this->fseek($NextOffset);
		}

$info['playtime_seconds'] = $Duration / 1000;
		if ($info['playtime_seconds'] > 0) {
			$info['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['playtime_seconds'];
		}

if ($info['flv']['header']['hasAudio']) {
			$info['audio']['codec']           =   self::audioFormatLookup($info['flv']['audio']['audioFormat']);
			$info['audio']['sample_rate']     =     self::audioRateLookup($info['flv']['audio']['audioRate']);
			$info['audio']['bits_per_sample'] = self::audioBitDepthLookup($info['flv']['audio']['audioSampleSize']);

$info['audio']['channels']   =  $info['flv']['audio']['audioType'] + 1; // 0=mono,1=stereo
			$info['audio']['lossless']   = ($info['flv']['audio']['audioFormat'] ? false : true); // 0=uncompressed
			$info['audio']['dataformat'] = 'flv';
		}
		if (!empty($info['flv']['header']['hasVideo'])) {
			$info['video']['codec']      = self::videoCodecLookup($info['flv']['video']['videoCodec']);
			$info['video']['dataformat'] = 'flv';
			$info['video']['lossless']   = false;
		}

// Set information from meta
		if (!empty($info['flv']['meta']['onMetaData']['duration'])) {
			$info['playtime_seconds'] = $info['flv']['meta']['onMetaData']['duration'];
			$info['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['playtime_seconds'];
		}
		if (isset($info['flv']['meta']['onMetaData']['audiocodecid'])) {
			$info['audio']['codec'] = self::audioFormatLookup($info['flv']['meta']['onMetaData']['audiocodecid']);
		}
		if (isset($info['flv']['meta']['onMetaData']['videocodecid'])) {
			$info['video']['codec'] = self::videoCodecLookup($info['flv']['meta']['onMetaData']['videocodecid']);
		}
		return true;
	}

/**
	 * @param int $id
	 *
	 * @return string|false
	 */
	public static function audioFormatLookup($id) {
		static $lookup = array(
			0  => 'Linear PCM, platform endian',
			1  => 'ADPCM',
			2  => 'mp3',
			3  => 'Linear PCM, little endian',
			4  => 'Nellymoser 16kHz mono',
			5  => 'Nellymoser 8kHz mono',
			6  => 'Nellymoser',
			7  => 'G.711A-law logarithmic PCM',
			8  => 'G.711 mu-law logarithmic PCM',
			9  => 'reserved',
			10 => 'AAC',
			11 => 'Speex',
			12 => false, // unknown?
			13 => false, // unknown?
			14 => 'mp3 8kHz',
			15 => 'Device-specific sound',
		);
		return (isset($lookup[$id]) ? $lookup[$id] : false);
	}

/**
	 * @param int $id
	 *
	 * @return int|false
	 */
	public static function audioRateLookup($id) {
		static $lookup = array(
			0 =>  5500,
			1 => 11025,
			2 => 22050,
			3 => 44100,
		);
		return (isset($lookup[$id]) ? $lookup[$id] : false);
	}

/**
	 * @param int $id
	 *
	 * @return int|false
	 */
	public static function audioBitDepthLookup($id) {
		static $lookup = array(
			0 =>  8,
			1 => 16,
		);
		return (isset($lookup[$id]) ? $lookup[$id] : false);
	}

/**
	 * @param int $id
	 *
	 * @return string|false
	 */
	public static function videoCodecLookup($id) {
		static $lookup = array(
			GETID3_FLV_VIDEO_H263         => 'Sorenson H.263',
			GETID3_FLV_VIDEO_SCREEN       => 'Screen video',
			GETID3_FLV_VIDEO_VP6FLV       => 'On2 VP6',
			GETID3_FLV_VIDEO_VP6FLV_ALPHA => 'On2 VP6 with alpha channel',
			GETID3_FLV_VIDEO_SCREENV2     => 'Screen video v2',
			GETID3_FLV_VIDEO_H264         => 'Sorenson H.264',
		);
		return (isset($lookup[$id]) ? $lookup[$id] : false);
	}
}

class AMFStream
{
	/**
	 * @var string
	 */
	public $bytes;

/**
	 * @var int
	 */
	public $pos;

/**
	 * @param string $bytes
	 */
	public function __construct(&$bytes) {
		$this->bytes =& $bytes;
		$this->pos = 0;
	}

/**
	 * @return int
	 */
	public function readByte() { //  8-bit
		return ord(substr($this->bytes, $this->pos++, 1));
	}

/**
	 * @return int
	 */
	public function readInt() { // 16-bit
		return ($this->readByte() << 8) + $this->readByte();
	}

/**
	 * @return int
	 */
	public function readLong() { // 32-bit
		return ($this->readByte() << 24) + ($this->readByte() << 16) + ($this->readByte() << 8) + $this->readByte();
	}

/**
	 * @return float|false
	 */
	public function readDouble() {
		return getid3_lib::BigEndian2Float($this->read(8));
	}

/**
	 * @return string
	 */
	public function readUTF() {
		$length = $this->readInt();
		return $this->read($length);
	}

/**
	 * @return string
	 */
	public function readLongUTF() {
		$length = $this->readLong();
		return $this->read($length);
	}

/**
	 * @param int $length
	 *
	 * @return string
	 */
	public function read($length) {
		$val = substr($this->bytes, $this->pos, $length);
		$this->pos += $length;
		return $val;
	}

/**
	 * @return int
	 */
	public function peekByte() {
		$pos = $this->pos;
		$val = $this->readByte();
		$this->pos = $pos;
		return $val;
	}

/**
	 * @return int
	 */
	public function peekInt() {
		$pos = $this->pos;
		$val = $this->readInt();
		$this->pos = $pos;
		return $val;
	}

/**
	 * @return int
	 */
	public function peekLong() {
		$pos = $this->pos;
		$val = $this->readLong();
		$this->pos = $pos;
		return $val;
	}

/**
	 * @return float|false
	 */
	public function peekDouble() {
		$pos = $this->pos;
		$val = $this->readDouble();
		$this->pos = $pos;
		return $val;
	}

/**
	 * @return string
	 */
	public function peekUTF() {
		$pos = $this->pos;
		$val = $this->readUTF();
		$this->pos = $pos;
		return $val;
	}

/**
	 * @return string
	 */
	public function peekLongUTF() {
		$pos = $this->pos;
		$val = $this->readLongUTF();
		$this->pos = $pos;
		return $val;
	}
}

class AMFReader
{
	/**
	* @var AMFStream
	*/
	public $stream;

/**
	 * @param AMFStream $stream
	 */
	public function __construct(AMFStream $stream) {
		$this->stream = $stream;
	}

/**
	 * @return mixed
	 */
	public function readData() {
		$value = null;

$type = $this->stream->readByte();
		switch ($type) {

// Double
			case 0:
				$value = $this->readDouble();
			break;

// Boolean
			case 1:
				$value = $this->readBoolean();
				break;

// String
			case 2:
				$value = $this->readString();
				break;

// Object
			case 3:
				$value = $this->readObject();
				break;

// null
			case 6:
				return null;

// Mixed array
			case 8:
				$value = $this->readMixedArray();
				break;

// Array
			case 10:
				$value = $this->readArray();
				break;

// Date
			case 11:
				$value = $this->readDate();
				break;

// Long string
			case 13:
				$value = $this->readLongString();
				break;

// XML (handled as string)
			case 15:
				$value = $this->readXML();
				break;

// Typed object (handled as object)
			case 16:
				$value = $this->readTypedObject();
				break;

// Long string
			default:
				$value = '(unknown or unsupported data type)';
				break;
		}

return $value;
	}

/**
	 * @return float|false
	 */
	public function readDouble() {
		return $this->stream->readDouble();
	}

/**
	 * @return bool
	 */
	public function readBoolean() {
		return $this->stream->readByte() == 1;
	}

/**
	 * @return string
	 */
	public function readString() {
		return $this->stream->readUTF();
	}

/**
	 * @return array
	 */
	public function readObject() {
		// Get highest numerical index - ignored
//		$highestIndex = $this->stream->readLong();

$data = array();
		$key = null;

while ($key = $this->stream->readUTF()) {
			$data[$key] = $this->readData();
		}
		// Mixed array record ends with empty string (0x00 0x00) and 0x09
		if (($key == '') && ($this->stream->peekByte() == 0x09)) {
			// Consume byte
			$this->stream->readByte();
		}
		return $data;
	}

/**
	 * @return array
	 */
	public function readMixedArray() {
		// Get highest numerical index - ignored
		$highestIndex = $this->stream->readLong();

$data = array();
		$key = null;

while ($key = $this->stream->readUTF()) {
			if (is_numeric($key)) {
				$key = (int) $key;
			}
			$data[$key] = $this->readData();
		}
		// Mixed array record ends with empty string (0x00 0x00) and 0x09
		if (($key == '') && ($this->stream->peekByte() == 0x09)) {
			// Consume byte
			$this->stream->readByte();
		}

return $data;
	}

/**
	 * @return array
	 */
	public function readArray() {
		$length = $this->stream->readLong();
		$data = array();

for ($i = 0; $i < $length; $i++) {
			$data[] = $this->readData();
		}
		return $data;
	}

/**
	 * @return float|false
	 */
	public function readDate() {
		$timestamp = $this->stream->readDouble();
		$timezone = $this->stream->readInt();
		return $timestamp;
	}

/**
	 * @return string
	 */
	public function readLongString() {
		return $this->stream->readLongUTF();
	}

/**
	 * @return string
	 */
	public function readXML() {
		return $this->stream->readLongUTF();
	}

/**
	 * @return array
	 */
	public function readTypedObject() {
		$className = $this->stream->readUTF();
		return $this->readObject();
	}
}

class AVCSequenceParameterSetReader
{
	/**
	 * @var string
	 */
	public $sps;
	public $start = 0;
	public $currentBytes = 0;
	public $currentBits = 0;

/**
	 * @var int
	 */
	public $width;

/**
	 * @var int
	 */
	public $height;

/**
	 * @param string $sps
	 */
	public function __construct($sps) {
		$this->sps = $sps;
	}

public function readData() {
		$this->skipBits(8);
		$this->skipBits(8);
		$profile = $this->getBits(8);                               // read profile
		if ($profile > 0) {
			$this->skipBits(8);
			$level_idc = $this->getBits(8);                         // level_idc
			$this->expGolombUe();                                   // seq_parameter_set_id // sps
			$this->expGolombUe();                                   // log2_max_frame_num_minus4
			$picOrderType = $this->expGolombUe();                   // pic_order_cnt_type
			if ($picOrderType == 0) {
				$this->expGolombUe();                               // log2_max_pic_order_cnt_lsb_minus4
			} elseif ($picOrderType == 1) {
				$this->skipBits(1);                                 // delta_pic_order_always_zero_flag
				$this->expGolombSe();                               // offset_for_non_ref_pic
				$this->expGolombSe();                               // offset_for_top_to_bottom_field
				$num_ref_frames_in_pic_order_cnt_cycle = $this->expGolombUe(); // num_ref_frames_in_pic_order_cnt_cycle
				for ($i = 0; $i < $num_ref_frames_in_pic_order_cnt_cycle; $i++) {
					$this->expGolombSe();                           // offset_for_ref_frame[ i ]
				}
			}
			$this->expGolombUe();                                   // num_ref_frames
			$this->skipBits(1);                                     // gaps_in_frame_num_value_allowed_flag
			$pic_width_in_mbs_minus1 = $this->expGolombUe();        // pic_width_in_mbs_minus1
			$pic_height_in_map_units_minus1 = $this->expGolombUe(); // pic_height_in_map_units_minus1

$frame_mbs_only_flag = $this->getBits(1);               // frame_mbs_only_flag
			if ($frame_mbs_only_flag == 0) {
				$this->skipBits(1);                                 // mb_adaptive_frame_field_flag
			}
			$this->skipBits(1);                                     // direct_8x8_inference_flag
			$frame_cropping_flag = $this->getBits(1);               // frame_cropping_flag

$frame_crop_left_offset   = 0;
			$frame_crop_right_offset  = 0;
			$frame_crop_top_offset    = 0;
			$frame_crop_bottom_offset = 0;

if ($frame_cropping_flag) {
				$frame_crop_left_offset   = $this->expGolombUe();   // frame_crop_left_offset
				$frame_crop_right_offset  = $this->expGolombUe();   // frame_crop_right_offset
				$frame_crop_top_offset    = $this->expGolombUe();   // frame_crop_top_offset
				$frame_crop_bottom_offset = $this->expGolombUe();   // frame_crop_bottom_offset
			}
			$this->skipBits(1);                                     // vui_parameters_present_flag
			// etc

$this->width  = (($pic_width_in_mbs_minus1 + 1) * 16) - ($frame_crop_left_offset * 2) - ($frame_crop_right_offset * 2);
			$this->height = ((2 - $frame_mbs_only_flag) * ($pic_height_in_map_units_minus1 + 1) * 16) - ($frame_crop_top_offset * 2) - ($frame_crop_bottom_offset * 2);
		}
	}

/**
	 * @param int $bits
	 */
	public function skipBits($bits) {
		$newBits = $this->currentBits + $bits;
		$this->currentBytes += (int)floor($newBits / 8);
		$this->currentBits = $newBits % 8;
	}

/**
	 * @return int
	 */
	public function getBit() {
		$result = (getid3_lib::BigEndian2Int(substr($this->sps, $this->currentBytes, 1)) >> (7 - $this->currentBits)) & 0x01;
		$this->skipBits(1);
		return $result;
	}

/**
	 * @param int $bits
	 *
	 * @return int
	 */
	public function getBits($bits) {
		$result = 0;
		for ($i = 0; $i < $bits; $i++) {
			$result = ($result << 1) + $this->getBit();
		}
		return $result;
	}

/**
	 * @return int
	 */
	public function expGolombUe() {
		$significantBits = 0;
		$bit = $this->getBit();
		while ($bit == 0) {
			$significantBits++;
			$bit = $this->getBit();

if ($significantBits > 31) {
				// something is broken, this is an emergency escape to prevent infinite loops
				return 0;
			}
		}
		return (1 << $significantBits) + $this->getBits($significantBits) - 1;
	}

/**
	 * @return int
	 */
	public function expGolombSe() {
		$result = $this->expGolombUe();
		if (($result & 0x01) == 0) {
			return -($result >> 1);
		} else {
			return ($result + 1) >> 1;
		}
	}

/**
	 * @return int
	 */
	public function getWidth() {
		return $this->width;
	}

/**
	 * @return int
	 */
	public function getHeight() {
		return $this->height;
	}
}
����readme.txt������������������������������������������������������������������������������������������0000644�����������������00000063332�15150061000�0006535 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org>               //
//  available at http://getid3.sourceforge.net                 //
//            or https://www.getid3.org                        //
//          also https://github.com/JamesHeinrich/getID3       //
/////////////////////////////////////////////////////////////////

*****************************************************************
*****************************************************************

getID3() is released under multiple licenses. You may choose
   from the following licenses, and use getID3 according to the
   terms of the license most suitable to your project.

GNU GPL: https://gnu.org/licenses/gpl.html                   (v3)
         https://gnu.org/licenses/old-licenses/gpl-2.0.html  (v2)
         https://gnu.org/licenses/old-licenses/gpl-1.0.html  (v1)

GNU LGPL: https://gnu.org/licenses/lgpl.html                 (v3)

Mozilla MPL: https://www.mozilla.org/MPL/2.0/                (v2)

getID3 Commercial License: https://www.getid3.org/#gCL
(no longer available, existing licenses remain valid)

*****************************************************************
*****************************************************************
Copies of each of the above licenses are included in the 'licenses'
directory of the getID3 distribution.

+----------------------------------------------+
       | If you want to donate, there is a link on    |
       | https://www.getid3.org for PayPal donations. |
       +----------------------------------------------+

Quick Start
===========================================================================

Q: How can I check that getID3() works on my server/files?
A: Unzip getID3() to a directory, then access /demos/demo.browse.php

Support
===========================================================================

Q: I have a question, or I found a bug. What do I do?
A: The preferred method of support requests and/or bug reports is the
   forum at http://support.getid3.org/

Sourceforge Notification
===========================================================================

It's highly recommended that you sign up for notification from
Sourceforge for when new versions are released. Please visit:
http://sourceforge.net/project/showfiles.php?group_id=55859
and click the little "monitor package" icon/link.  If you're
previously signed up for the mailing list, be aware that it has
been discontinued, only the automated Sourceforge notification
will be used from now on.

What does getID3() do?
===========================================================================

Reads & parses (to varying degrees):
 ¤ tags:
  * APE (v1 and v2)
  * ID3v1 (& ID3v1.1)
  * ID3v2 (v2.4, v2.3, v2.2)
  * Lyrics3 (v1 & v2)

¤ audio-lossy:
  * MP3/MP2/MP1
  * MPC / Musepack
  * Ogg (Vorbis, OggFLAC, Speex, Opus)
  * AAC / MP4
  * AC3
  * DTS
  * RealAudio
  * Speex
  * DSS
  * VQF

¤ audio-lossless:
  * AIFF
  * AU
  * Bonk
  * CD-audio (*.cda)
  * FLAC
  * LA (Lossless Audio)
  * LiteWave
  * LPAC
  * MIDI
  * Monkey's Audio
  * OptimFROG
  * RKAU
  * Shorten
  * TTA
  * VOC
  * WAV (RIFF)
  * WavPack

¤ audio-video:
  * ASF: ASF, Windows Media Audio (WMA), Windows Media Video (WMV)
  * AVI (RIFF)
  * Flash
  * Matroska (MKV)
  * MPEG-1 / MPEG-2
  * NSV (Nullsoft Streaming Video)
  * Quicktime (including MP4)
  * RealVideo

¤ still image:
  * BMP
  * GIF
  * JPEG
  * PNG
  * TIFF
  * SWF (Flash)
  * PhotoCD

¤ data:
  * ISO-9660 CD-ROM image (directory structure)
  * SZIP (limited support)
  * ZIP (directory structure)
  * TAR
  * CUE

Writes:
  * ID3v1 (& ID3v1.1)
  * ID3v2 (v2.3 & v2.4)
  * VorbisComment on OggVorbis
  * VorbisComment on FLAC (not OggFLAC)
  * APE v2
  * Lyrics3 (delete only)

Requirements
===========================================================================

* PHP 4.2.0 up to 5.2.x for getID3() 1.7.x  (and earlier)
* PHP 5.0.5 (or higher) for getID3() 1.8.x  (and up)
* PHP 5.3.0 (or higher) for getID3() 1.9.17 (and up)
* PHP 5.3.0 (or higher) for getID3() 2.0.x  (and up)
* at least 4MB memory for PHP. 8MB or more is highly recommended.
  12MB is required with all modules loaded.

Usage
===========================================================================

See /demos/demo.basic.php for a very basic use of getID3() with no
fancy output, just scanning one file.

See structure.txt for the returned data structure.

*>  For an example of a complete directory-browsing,       <*
*>  file-scanning implementation of getID3(), please run   <*
*>  /demos/demo.browse.php                                 <*

See /demos/demo.mysql.php for a sample recursive scanning code that
scans every file in a given directory, and all sub-directories, stores
the results in a database and allows various analysis / maintenance
operations

To analyze remote files over HTTP or FTP you need to copy the file
locally first before running getID3(). Your code would look something
like this:

// Copy remote file locally to scan with getID3()
$remotefilename = 'http://www.example.com/filename.mp3';
if ($fp_remote = fopen($remotefilename, 'rb')) {
	$localtempfilename = tempnam('/tmp', 'getID3');
	if ($fp_local = fopen($localtempfilename, 'wb')) {
		while ($buffer = fread($fp_remote, 32768)) {
			fwrite($fp_local, $buffer);
		}
		fclose($fp_local);

$remote_headers = array_change_key_case(get_headers($remotefilename, 1), CASE_LOWER);
		$remote_filesize = (isset($remote_headers['content-length']) ? (is_array($remote_headers['content-length']) ? $remote_headers['content-length'][count($remote_headers['content-length']) - 1] : $remote_headers['content-length']) : null);

// Initialize getID3 engine
		$getID3 = new getID3;

$ThisFileInfo = $getID3->analyze($localtempfilename, $remote_filesize, basename($remotefilename));

// Delete temporary file
		unlink($localtempfilename);
	}
	fclose($fp_remote);
}

Note: since v1.9.9-20150212 it is possible a second and third parameter
to $getID3->analyze(), for original filesize and original filename
respectively. This permits you to download only a portion of a large remote
file but get accurate playtime estimates, assuming the format only requires
the beginning of the file for correct format analysis.

See /demos/demo.write.php for how to write tags.

What does the returned data structure look like?
===========================================================================

See structure.txt

It is recommended that you look at the output of
/demos/demo.browse.php scanning the file(s) you're interested in to
confirm what data is actually returned for any particular filetype in
general, and your files in particular, as the actual data returned
may vary considerably depending on what information is available in
the file itself.

Notes
===========================================================================

getID3() 1.x:
If the format parser encounters a critical problem, it will return
something in $fileinfo['error'], describing the encountered error. If
a less critical error or notice is generated it will appear in
$fileinfo['warning']. Both keys may contain more than one warning or
error. If something is returned in ['error'] then the file was not
correctly parsed and returned data may or may not be correct and/or
complete. If something is returned in ['warning'] (and not ['error'])
then the data that is returned is OK - usually getID3() is reporting
errors in the file that have been worked around due to known bugs in
other programs. Some warnings may indicate that the data that is
returned is OK but that some data could not be extracted due to
errors in the file.

getID3() 2.x:
See above except errors are thrown (so you will only get one error).

Disclaimer
===========================================================================

getID3() has been tested on many systems, on many types of files,
under many operating systems, and is generally believe to be stable
and safe. That being said, there is still the chance there is an
undiscovered and/or unfixed bug that may potentially corrupt your
file, especially within the writing functions. By using getID3() you
agree that it's not my fault if any of your files are corrupted.
In fact, I'm not liable for anything :)

License
===========================================================================

GNU General Public License - see license.txt

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA  02111-1307, USA.

FAQ:
Q: Can I use getID3() in my program? Do I need a commercial license?
A: You're generally free to use getID3 however you see fit. The only
   case in which you would require a commercial license is if you're
   selling your closed-source program that integrates getID3. If you
   sell your program including a copy of getID3, that's fine as long
   as you include a copy of the sourcecode when you sell it.  Or you
   can distribute your code without getID3 and say "download it from
   getid3.sourceforge.net"

Why is it called "getID3()" if it does so much more than just that?
===========================================================================

v0.1 did in fact just do that. I don't have a copy of code that old, but I
could essentially write it today with a one-line function:
  function getID3($filename) { return unpack('a3TAG/a30title/a30artist/a30album/a4year/a28comment/c1track/c1genreid', substr(file_get_contents($filename), -128)); }

Future Plans
===========================================================================
https://www.getid3.org/phpBB3/viewforum.php?f=7

* Better support for MP4 container format
* Scan for appended ID3v2 tag at end of file per ID3v2.4 specs (Section 5.0)
* Support for JPEG-2000 (http://www.morgan-multimedia.com/jpeg2000_overview.htm)
* Support for MOD (mod/stm/s3m/it/xm/mtm/ult/669)
* Support for ACE (thanks Vince)
* Support for Ogg other than Vorbis, Speex and OggFlac (ie. Ogg+Xvid)
* Ability to create Xing/LAME VBR header for VBR MP3s that are missing VBR header
* Ability to "clean" ID3v2 padding (replace invalid padding with valid padding)
* Warn if MP3s change version mid-stream (in full-scan mode)
* check for corrupt/broken mid-file MP3 streams in histogram scan
* Support for lossless-compression formats
  (http://www.firstpr.com.au/audiocomp/lossless/#Links)
  (http://compression.ca/act-sound.html)
  (http://web.inter.nl.net/users/hvdh/lossless/lossless.htm)
* Support for RIFF-INFO chunks
  * http://lotto.st-andrews.ac.uk/~njh/tag_interchange.html
    (thanks Nick Humfrey <njhØsurgeradio*co*uk>)
  * http://abcavi.narod.ru/sof/abcavi/infotags.htm
    (thanks Kibi)
* Better support for Bink video
* http://www.hr/josip/DSP/AudioFile2.html
* http://www.pcisys.net/~melanson/codecs/
* Detect mp3PRO
* Support for PSD
* Support for JPC
* Support for JP2
* Support for JPX
* Support for JB2
* Support for IFF
* Support for ICO
* Support for ANI
* Support for EXE (comments, author, etc) (thanks p*quaedackersØplanet*nl)
* Support for DVD-IFO (region, subtitles, aspect ratio, etc)
  (thanks p*quaedackersØplanet*nl)
* More complete support for SWF - parsing encapsulated MP3 and/or JPEG content
    (thanks n8n8Øyahoo*com)
* Support for a2b
* Optional scan-through-frames for AVI verification
  (thanks rockcohenØmassive-interactive*nl)
* Support for TTF (thanks infoØbutterflyx*com)
* Support for DSS (https://www.getid3.org/phpBB3/viewtopic.php?t=171)
* Support for SMAF (http://smaf-yamaha.com/what/demo.html)
  https://www.getid3.org/phpBB3/viewtopic.php?t=182
* Support for AMR (https://www.getid3.org/phpBB3/viewtopic.php?t=195)
* Support for 3gpp (https://www.getid3.org/phpBB3/viewtopic.php?t=195)
* Support for ID4 (http://www.wackysoft.cjb.net grizlyY2KØhotmail*com)
* Parse XML data returned in Ogg comments
* Parse XML data from Quicktime SMIL metafiles (klausrathØmac*com)
* ID3v2 genre string creator function
* More complete parsing of JPG
* Support for all old-style ASF packets
* ASF/WMA/WMV tag writing
* Parse declared T??? ID3v2 text information frames, where appropriate
    (thanks Christian Fritz for the idea)
* Recognize encoder:
  http://www.guerillasoft.com/EncSpot2/index.html
  http://ff123.net/identify.html
  http://www.hydrogenaudio.org/?act=ST&f=16&t=9414
  http://www.hydrogenaudio.org/?showtopic=11785
* Support for other OS/2 bitmap structures: Bitmap Array('BA'),
  Color Icon('CI'), Color Pointer('CP'), Icon('IC'), Pointer ('PT')
  http://netghost.narod.ru/gff/graphics/summary/os2bmp.htm
* Support for WavPack RAW mode
* ASF/WMA/WMV data packet parsing
* ID3v2FrameFlagsLookupTagAlter()
* ID3v2FrameFlagsLookupFileAlter()
* obey ID3v2 tag alter/preserve/discard rules
* http://www.geocities.com/SiliconValley/Sector/9654/Softdoc/Illyrium/Aolyr.htm
* proper checking for LINK/LNK frame validity in ID3v2 writing
* proper checking for ASPI-TLEN frame validity in ID3v2 writing
* proper checking for COMR frame validity in ID3v2 writing
* http://www.geocities.co.jp/SiliconValley-Oakland/3664/index.html
* decode GEOB ID3v2 structure as encoded by RealJukebox,
  decode NCON ID3v2 structure as encoded by MusicMatch
  (probably won't happen - the formats are proprietary)

Known Bugs/Issues in getID3() that may be fixed eventually
===========================================================================
https://www.getid3.org/phpBB3/viewtopic.php?t=25

* Cannot determine bitrate for MPEG video with VBR video data
  (need documentation)
* Interlace/progressive cannot be determined for MPEG video
  (need documentation)
* MIDI playtime is sometimes inaccurate
* AAC-RAW mode files cannot be identified
* WavPack-RAW mode files cannot be identified
* mp4 files report lots of "Unknown QuickTime atom type"
   (need documentation)
* Encrypted ASF/WMA/WMV files warn about "unhandled GUID
  ASF_Content_Encryption_Object"
* Bitrate split between audio and video cannot be calculated for
  NSV, only the total bitrate. (need documentation)
* All Ogg formats (Vorbis, OggFLAC, Speex) are affected by the
  problem of large VorbisComments spanning multiple Ogg pages, but
  but only OggVorbis files can be processed with vorbiscomment.
* The version of "head" supplied with Mac OS 10.2.8 (maybe other
  versions too) does only understands a single option (-n) and
  therefore fails. getID3 ignores this and returns wrong md5_data.

Known Bugs/Issues in getID3() that cannot be fixed
--------------------------------------------------
https://www.getid3.org/phpBB3/viewtopic.php?t=25

* 32-bit PHP installations only:
  Files larger than 2GB cannot always be parsed fully by getID3()
  due to limitations in the 32-bit PHP filesystem functions.
  NOTE: Since v1.7.8b3 there is partial support for larger-than-
  2GB files, most of which will parse OK, as long as no critical
  data is located beyond the 2GB offset.
  Known will-work:
  * all file formats on 64-bit PHP
  * ZIP  (format doesn't support files >2GB)
  * FLAC (current encoders don't support files >2GB)
  Known will-not-work:
  * ID3v1 tags (always located at end-of-file)
  * Lyrics3 tags (always located at end-of-file)
  * APE tags (always located at end-of-file)
  Maybe-will-work:
  * Quicktime (will work if needed metadata is before 2GB offset,
    that is if the file has been hinted/optimized for streaming)
  * RIFF.WAV (should work fine, but gives warnings about not being
    able to parse all chunks)
  * RIFF.AVI (playtime will probably be wrong, is only based on
    "movi" chunk that fits in the first 2GB, should issue error
    to show that playtime is incorrect. Other data should be mostly
    correct, assuming that data is constant throughout the file)
* PHP <= v5 on Windows cannot read UTF-8 filenames

Known Bugs/Issues in other programs
-----------------------------------
https://www.getid3.org/phpBB3/viewtopic.php?t=25

* MusicBrainz Picard (at least up to v1.3.2) writes multiple
  ID3v2.3 genres in non-standard forward-slash separated text
  rather than parenthesis-numeric+refinement style per the ID3v2.3
  specs. Tags written in ID3v2.4 mode are written correctly.
  (detected and worked around by getID3())
* PZ TagEditor v4.53.408 has been known to insert ID3v2.3 frames
  into an existing ID3v2.2 tag which, of course, breaks things
* Windows Media Player (up to v11) and iTunes (up to v10+) do
    not correctly handle ID3v2.3 tags with UTF-16BE+BOM
    encoding (they assume the data is UTF-16LE+BOM and either
    crash (WMP) or output Asian character set (iTunes)
* Winamp (up to v2.80 at least) does not support ID3v2.4 tags,
    only ID3v2.3
    see: http://forums.winamp.com/showthread.php?postid=387524
* Some versions of Helium2 (www.helium2.com) do not write
    ID3v2.4-compliant Frame Sizes, even though the tag is marked
    as ID3v2.4)  (detected by getID3())
* MP3ext V3.3.17 places a non-compliant padding string at the end
    of the ID3v2 header. This is supposedly fixed in v3.4b21 but
    only if you manually add a registry key. This fix is not yet
    confirmed.  (detected by getID3())
* CDex v1.40 (fixed by v1.50b7) writes non-compliant Ogg comment
    strings, supposed to be in the format "NAME=value" but actually
    written just "value"  (detected by getID3())
* Oggenc 0.9-rc3 flags the encoded file as ABR whether it's
    actually ABR or VBR.
* iTunes (versions "v7.0.0.70" is known-guilty, probably
    other versions are too) writes ID3v2.3 comment tags using an
    ID3v2.2 frame name (3-bytes) null-padded to 4 bytes which is
    not valid for ID3v2.3+
    (detected by getID3() since 1.9.12-201603221746)
* iTunes (versions "X v2.0.3", "v3.0.1" are known-guilty, probably
    other versions are too) writes ID3v2.3 comment tags using a
    frame name 'COM ' which is not valid for ID3v2.3+ (it's an
    ID3v2.2-style frame name)  (detected by getID3())
* MP2enc does not encode mono CBR MP2 files properly (half speed
    sound and double playtime)
* MP2enc does not encode mono VBR MP2 files properly (actually
    encoded as stereo)
* tooLAME does not encode mono VBR MP2 files properly (actually
    encoded as stereo)
* AACenc encodes files in VBR mode (actually ABR) even if CBR is
   specified
* AAC/ADIF - bitrate_mode = cbr for vbr files
* LAME 3.90-3.92 prepends one frame of null data (space for the
  LAME/VBR header, but it never gets written) when encoding in CBR
  mode with the DLL
* Ahead Nero encodes TwinVQF with a DSIZ value (which is supposed
  to be the filesize in bytes) of "0" for TwinVQF v1.0 and "1" for
  TwinVQF v2.0  (detected by getID3())
* Ahead Nero encodes TwinVQF files 1 second shorter than they
  should be
* AAC-ADTS files are always actually encoded VBR, even if CBR mode
  is specified (the CBR-mode switches on the encoder enable ABR
  mode, not CBR as such, but it's not possible to tell the
  difference between such ABR files and true VBR)
* STREAMINFO.audio_signature in OggFLAC is always null. "The reason
  it's like that is because there is no seeking support in
  libOggFLAC yet, so it has no way to go back and write the
  computed sum after encoding. Seeking support in Ogg FLAC is the
  #1 item for the next release." - Josh Coalson (FLAC developer)
  NOTE: getID3() will calculate md5_data in a method similar to
  other file formats, but that value cannot be compared to the
  md5_data value from FLAC data in a FLAC file format.
* STREAMINFO.audio_signature is not calculated in FLAC v0.3.0 &
  v0.4.0 - getID3() will calculate md5_data in a method similar to
  other file formats, but that value cannot be compared to the
  md5_data value from FLAC v0.5.0+
* RioPort (various versions including 2.0 and 3.11) tags ID3v2 with
  a WCOM frame that has no data portion
* Earlier versions of Coolplayer adds illegal ID3 tags to Ogg Vorbis
  files, thus making them corrupt.
* Meracl ID3 Tag Writer v1.3.4 (and older) incorrectly truncates the
  last byte of data from an MP3 file when appending a new ID3v1 tag.
  (detected by getID3())
* Lossless-Audio files encoded with and without the -noseek switch
  do actually differ internally and therefore cannot match md5_data
* iTunes has been known to append a new ID3v1 tag on the end of an
  existing ID3v1 tag when ID3v2 tag is also present
  (detected by getID3())
* MediaMonkey may write a blank RGAD ID3v2 frame but put actual
  replay gain adjustments in a series of user-defined TXXX frames
  (detected and handled by getID3() since v1.9.2)

Reference material:
===========================================================================

[www.id3.org material now mirrored at http://id3lib.sourceforge.net/id3/]
* http://www.id3.org/id3v2.4.0-structure.txt
* http://www.id3.org/id3v2.4.0-frames.txt
* http://www.id3.org/id3v2.4.0-changes.txt
* http://www.id3.org/id3v2.3.0.txt
* http://www.id3.org/id3v2-00.txt
* http://www.id3.org/mp3frame.html
* http://minnie.tuhs.org/pipermail/mp3encoder/2001-January/001800.html <mathewhendry@hotmail.com>
* http://www.dv.co.yu/mpgscript/mpeghdr.htm
* http://www.mp3-tech.org/programmer/frame_header.html
* http://users.belgacom.net/gc247244/extra/tag.html
* http://gabriel.mp3-tech.org/mp3infotag.html
* http://www.id3.org/iso4217.html
* http://www.unicode.org/Public/MAPPINGS/ISO8859/8859-1.TXT
* http://www.xiph.org/ogg/vorbis/doc/framing.html
* http://www.xiph.org/ogg/vorbis/doc/v-comment.html
* http://leknor.com/code/php/class.ogg.php.txt
* http://www.id3.org/iso639-2.html
* http://www.id3.org/lyrics3.html
* http://www.id3.org/lyrics3200.html
* http://www.psc.edu/general/software/packages/ieee/ieee.html
* http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/ieee-expl.html
* http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/binary.html
* http://www.jmcgowan.com/avi.html
* http://www.wotsit.org/
* http://www.herdsoft.com/ti/davincie/davp3xo2.htm
* http://www.mathdogs.com/vorbis-illuminated/bitstream-appendix.html
* "Standard MIDI File Format" by Dustin Caldwell (from www.wotsit.org)
* http://midistudio.com/Help/GMSpecs_Patches.htm
* http://www.xiph.org/archives/vorbis/200109/0459.html
* http://www.replaygain.org/
* http://www.lossless-audio.com/
* http://download.microsoft.com/download/winmediatech40/Doc/1.0/WIN98MeXP/EN-US/ASF_Specification_v.1.0.exe
* http://mediaxw.sourceforge.net/files/doc/Active%20Streaming%20Format%20(ASF)%201.0%20Specification.pdf
* http://www.uni-jena.de/~pfk/mpp/sv8/ (archived at http://www.hydrogenaudio.org/musepack/klemm/www.personal.uni-jena.de/~pfk/mpp/sv8/)
* http://jfaul.de/atl/
* http://www.uni-jena.de/~pfk/mpp/ (archived at http://www.hydrogenaudio.org/musepack/klemm/www.personal.uni-jena.de/~pfk/mpp/)
* http://www.libpng.org/pub/png/spec/png-1.2-pdg.html
* http://www.real.com/devzone/library/creating/rmsdk/doc/rmff.htm
* http://www.fastgraph.com/help/bmp_os2_header_format.html
* http://netghost.narod.ru/gff/graphics/summary/os2bmp.htm
* http://flac.sourceforge.net/format.html
* http://www.research.att.com/projects/mpegaudio/mpeg2.html
* http://www.audiocoding.com/wiki/index.php?page=AAC
* http://libmpeg.org/mpeg4/doc/w2203tfs.pdf
* http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
* http://developer.apple.com/techpubs/quicktime/qtdevdocs/RM/frameset.htm
* http://www.nullsoft.com/nsv/
* http://www.wotsit.org/download.asp?f=iso9660
* http://sandbox.mc.edu/~bennet/cs110/tc/tctod.html
* http://www.cdroller.com/htm/readdata.html
* http://www.speex.org/manual/node10.html
* http://www.harmony-central.com/Computer/Programming/aiff-file-format.doc
* http://www.faqs.org/rfcs/rfc2361.html
* http://ghido.shelter.ro/
* http://www.ebu.ch/tech_t3285.pdf
* http://www.sr.se/utveckling/tu/bwf
* http://ftp.aessc.org/pub/aes46-2002.pdf
* http://cartchunk.org:8080/
* http://www.broadcastpapers.com/radio/cartchunk01.htm
* http://www.hr/josip/DSP/AudioFile2.html
* http://home.attbi.com/~chris.bagwell/AudioFormats-11.html
* http://www.pure-mac.com/extkey.html
* http://cesnet.dl.sourceforge.net/sourceforge/bonkenc/bonk-binary-format-0.9.txt
* http://www.headbands.com/gspot/
* http://www.openswf.org/spec/SWFfileformat.html
* http://j-faul.virtualave.net/
* http://www.btinternet.com/~AnthonyJ/Atari/programming/avr_format.html
* http://cui.unige.ch/OSG/info/AudioFormats/ap11.html
* http://sswf.sourceforge.net/SWFalexref.html
* http://www.geocities.com/xhelmboyx/quicktime/formats/qti-layout.txt
* http://www-lehre.informatik.uni-osnabrueck.de/~fbstark/diplom/docs/swf/Flash_Uncovered.htm
* http://developer.apple.com/quicktime/icefloe/dispatch012.html
* http://www.csdn.net/Dev/Format/graphics/PCD.htm
* http://tta.iszf.irk.ru/
* http://www.atsc.org/standards/a_52a.pdf
* http://www.alanwood.net/unicode/
* http://www.freelists.org/archives/matroska-devel/07-2003/msg00010.html
* http://www.its.msstate.edu/net/real/reports/config/tags.stats
* http://homepages.slingshot.co.nz/~helmboy/quicktime/formats/qtm-layout.txt
* http://brennan.young.net/Comp/LiveStage/things.html
* http://www.multiweb.cz/twoinches/MP3inside.htm
* http://www.geocities.co.jp/SiliconValley-Oakland/3664/alittle.html#GenreExtended
* http://www.mactech.com/articles/mactech/Vol.06/06.01/SANENormalized/
* http://www.unicode.org/unicode/faq/utf_bom.html
* http://tta.corecodec.org/?menu=format
* http://www.scvi.net/nsvformat.htm
* http://pda.etsi.org/pda/queryform.asp
* http://cpansearch.perl.org/src/RGIBSON/Audio-DSS-0.02/lib/Audio/DSS.pm
* http://trac.musepack.net/trac/wiki/SV8Specification
* http://wyday.com/cuesharp/specification.php
* http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/Nikon.html
* http://www.codeproject.com/Articles/8295/MPEG-Audio-Frame-Header
* http://dsd-guide.com/sites/default/files/white-papers/DSFFileFormatSpec_E.pdf
* https://fileformats.fandom.com/wiki/Torrent_file������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������module.tag.id3v2.php��������������������������������������������������������������������������������0000644�����������������00000456312�15150061000�0010241 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������<?php

/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org>               //
//  available at https://github.com/JamesHeinrich/getID3       //
//            or https://www.getid3.org                        //
//            or http://getid3.sourceforge.net                 //
//  see readme.txt for more details                            //
/////////////////////////////////////////////////////////////////
///                                                            //
// module.tag.id3v2.php                                        //
// module for analyzing ID3v2 tags                             //
// dependencies: module.tag.id3v1.php                          //
//                                                            ///
/////////////////////////////////////////////////////////////////

class getid3_id3v2 extends getid3_handler
{
	public $StartingOffset = 0;

/**
	 * @return bool
	 */
	public function Analyze() {
		$info = &$this->getid3->info;

//    Overall tag structure:
		//        +-----------------------------+
		//        |      Header (10 bytes)      |
		//        +-----------------------------+
		//        |       Extended Header       |
		//        | (variable length, OPTIONAL) |
		//        +-----------------------------+
		//        |   Frames (variable length)  |
		//        +-----------------------------+
		//        |           Padding           |
		//        | (variable length, OPTIONAL) |
		//        +-----------------------------+
		//        | Footer (10 bytes, OPTIONAL) |
		//        +-----------------------------+

//    Header
		//        ID3v2/file identifier      "ID3"
		//        ID3v2 version              $04 00
		//        ID3v2 flags                (%ab000000 in v2.2, %abc00000 in v2.3, %abcd0000 in v2.4.x)
		//        ID3v2 size             4 * %0xxxxxxx

// shortcuts
		$info['id3v2']['header'] = true;
		$thisfile_id3v2                  = &$info['id3v2'];
		$thisfile_id3v2['flags']         =  array();
		$thisfile_id3v2_flags            = &$thisfile_id3v2['flags'];

$this->fseek($this->StartingOffset);
		$header = $this->fread(10);
		if (substr($header, 0, 3) == 'ID3'  &&  strlen($header) == 10) {

$thisfile_id3v2['majorversion'] = ord($header[3]);
			$thisfile_id3v2['minorversion'] = ord($header[4]);

// shortcut
			$id3v2_majorversion = &$thisfile_id3v2['majorversion'];

} else {

unset($info['id3v2']);
			return false;

}

if ($id3v2_majorversion > 4) { // this script probably won't correctly parse ID3v2.5.x and above (if it ever exists)

$this->error('this script only parses up to ID3v2.4.x - this tag is ID3v2.'.$id3v2_majorversion.'.'.$thisfile_id3v2['minorversion']);
			return false;

}

$id3_flags = ord($header[5]);
		switch ($id3v2_majorversion) {
			case 2:
				// %ab000000 in v2.2
				$thisfile_id3v2_flags['unsynch']     = (bool) ($id3_flags & 0x80); // a - Unsynchronisation
				$thisfile_id3v2_flags['compression'] = (bool) ($id3_flags & 0x40); // b - Compression
				break;

case 3:
				// %abc00000 in v2.3
				$thisfile_id3v2_flags['unsynch']     = (bool) ($id3_flags & 0x80); // a - Unsynchronisation
				$thisfile_id3v2_flags['exthead']     = (bool) ($id3_flags & 0x40); // b - Extended header
				$thisfile_id3v2_flags['experim']     = (bool) ($id3_flags & 0x20); // c - Experimental indicator
				break;

case 4:
				// %abcd0000 in v2.4
				$thisfile_id3v2_flags['unsynch']     = (bool) ($id3_flags & 0x80); // a - Unsynchronisation
				$thisfile_id3v2_flags['exthead']     = (bool) ($id3_flags & 0x40); // b - Extended header
				$thisfile_id3v2_flags['experim']     = (bool) ($id3_flags & 0x20); // c - Experimental indicator
				$thisfile_id3v2_flags['isfooter']    = (bool) ($id3_flags & 0x10); // d - Footer present
				break;
		}

$thisfile_id3v2['headerlength'] = getid3_lib::BigEndian2Int(substr($header, 6, 4), 1) + 10; // length of ID3v2 tag in 10-byte header doesn't include 10-byte header length

$thisfile_id3v2['tag_offset_start'] = $this->StartingOffset;
		$thisfile_id3v2['tag_offset_end']   = $thisfile_id3v2['tag_offset_start'] + $thisfile_id3v2['headerlength'];

// create 'encoding' key - used by getid3::HandleAllTags()
		// in ID3v2 every field can have it's own encoding type
		// so force everything to UTF-8 so it can be handled consistantly
		$thisfile_id3v2['encoding'] = 'UTF-8';

//    Frames

//        All ID3v2 frames consists of one frame header followed by one or more
	//        fields containing the actual information. The header is always 10
	//        bytes and laid out as follows:
	//
	//        Frame ID      $xx xx xx xx  (four characters)
	//        Size      4 * %0xxxxxxx
	//        Flags         $xx xx

$sizeofframes = $thisfile_id3v2['headerlength'] - 10; // not including 10-byte initial header
		if (!empty($thisfile_id3v2['exthead']['length'])) {
			$sizeofframes -= ($thisfile_id3v2['exthead']['length'] + 4);
		}
		if (!empty($thisfile_id3v2_flags['isfooter'])) {
			$sizeofframes -= 10; // footer takes last 10 bytes of ID3v2 header, after frame data, before audio
		}
		if ($sizeofframes > 0) {

$framedata = $this->fread($sizeofframes); // read all frames from file into $framedata variable

//    if entire frame data is unsynched, de-unsynch it now (ID3v2.3.x)
			if (!empty($thisfile_id3v2_flags['unsynch']) && ($id3v2_majorversion <= 3)) {
				$framedata = $this->DeUnsynchronise($framedata);
			}
			//        [in ID3v2.4.0] Unsynchronisation [S:6.1] is done on frame level, instead
			//        of on tag level, making it easier to skip frames, increasing the streamability
			//        of the tag. The unsynchronisation flag in the header [S:3.1] indicates that
			//        there exists an unsynchronised frame, while the new unsynchronisation flag in
			//        the frame header [S:4.1.2] indicates unsynchronisation.

//$framedataoffset = 10 + ($thisfile_id3v2['exthead']['length'] ? $thisfile_id3v2['exthead']['length'] + 4 : 0); // how many bytes into the stream - start from after the 10-byte header (and extended header length+4, if present)
			$framedataoffset = 10; // how many bytes into the stream - start from after the 10-byte header

//    Extended Header
			if (!empty($thisfile_id3v2_flags['exthead'])) {
				$extended_header_offset = 0;

if ($id3v2_majorversion == 3) {

// v2.3 definition:
					//Extended header size  $xx xx xx xx   // 32-bit integer
					//Extended Flags        $xx xx
					//     %x0000000 %00000000 // v2.3
					//     x - CRC data present
					//Size of padding       $xx xx xx xx

$thisfile_id3v2['exthead']['length'] = getid3_lib::BigEndian2Int(substr($framedata, $extended_header_offset, 4), 0);
					$extended_header_offset += 4;

$thisfile_id3v2['exthead']['flag_bytes'] = 2;
					$thisfile_id3v2['exthead']['flag_raw'] = getid3_lib::BigEndian2Int(substr($framedata, $extended_header_offset, $thisfile_id3v2['exthead']['flag_bytes']));
					$extended_header_offset += $thisfile_id3v2['exthead']['flag_bytes'];

$thisfile_id3v2['exthead']['flags']['crc'] = (bool) ($thisfile_id3v2['exthead']['flag_raw'] & 0x8000);

$thisfile_id3v2['exthead']['padding_size'] = getid3_lib::BigEndian2Int(substr($framedata, $extended_header_offset, 4));
					$extended_header_offset += 4;

if ($thisfile_id3v2['exthead']['flags']['crc']) {
						$thisfile_id3v2['exthead']['flag_data']['crc'] = getid3_lib::BigEndian2Int(substr($framedata, $extended_header_offset, 4));
						$extended_header_offset += 4;
					}
					$extended_header_offset += $thisfile_id3v2['exthead']['padding_size'];

} elseif ($id3v2_majorversion == 4) {

// v2.4 definition:
					//Extended header size   4 * %0xxxxxxx // 28-bit synchsafe integer
					//Number of flag bytes       $01
					//Extended Flags             $xx
					//     %0bcd0000 // v2.4
					//     b - Tag is an update
					//         Flag data length       $00
					//     c - CRC data present
					//         Flag data length       $05
					//         Total frame CRC    5 * %0xxxxxxx
					//     d - Tag restrictions
					//         Flag data length       $01

$thisfile_id3v2['exthead']['length'] = getid3_lib::BigEndian2Int(substr($framedata, $extended_header_offset, 4), true);
					$extended_header_offset += 4;

$thisfile_id3v2['exthead']['flag_bytes'] = getid3_lib::BigEndian2Int(substr($framedata, $extended_header_offset, 1)); // should always be 1
					$extended_header_offset += 1;

$thisfile_id3v2['exthead']['flag_raw'] = getid3_lib::BigEndian2Int(substr($framedata, $extended_header_offset, $thisfile_id3v2['exthead']['flag_bytes']));
					$extended_header_offset += $thisfile_id3v2['exthead']['flag_bytes'];

$thisfile_id3v2['exthead']['flags']['update']       = (bool) ($thisfile_id3v2['exthead']['flag_raw'] & 0x40);
					$thisfile_id3v2['exthead']['flags']['crc']          = (bool) ($thisfile_id3v2['exthead']['flag_raw'] & 0x20);
					$thisfile_id3v2['exthead']['flags']['restrictions'] = (bool) ($thisfile_id3v2['exthead']['flag_raw'] & 0x10);

if ($thisfile_id3v2['exthead']['flags']['update']) {
						$ext_header_chunk_length = getid3_lib::BigEndian2Int(substr($framedata, $extended_header_offset, 1)); // should be 0
						$extended_header_offset += 1;
					}

if ($thisfile_id3v2['exthead']['flags']['crc']) {
						$ext_header_chunk_length = getid3_lib::BigEndian2Int(substr($framedata, $extended_header_offset, 1)); // should be 5
						$extended_header_offset += 1;
						$thisfile_id3v2['exthead']['flag_data']['crc'] = getid3_lib::BigEndian2Int(substr($framedata, $extended_header_offset, $ext_header_chunk_length), true, false);
						$extended_header_offset += $ext_header_chunk_length;
					}

if ($thisfile_id3v2['exthead']['flags']['restrictions']) {
						$ext_header_chunk_length = getid3_lib::BigEndian2Int(substr($framedata, $extended_header_offset, 1)); // should be 1
						$extended_header_offset += 1;

// %ppqrrstt
						$restrictions_raw = getid3_lib::BigEndian2Int(substr($framedata, $extended_header_offset, 1));
						$extended_header_offset += 1;
						$thisfile_id3v2['exthead']['flags']['restrictions']['tagsize']  = ($restrictions_raw & 0xC0) >> 6; // p - Tag size restrictions
						$thisfile_id3v2['exthead']['flags']['restrictions']['textenc']  = ($restrictions_raw & 0x20) >> 5; // q - Text encoding restrictions
						$thisfile_id3v2['exthead']['flags']['restrictions']['textsize'] = ($restrictions_raw & 0x18) >> 3; // r - Text fields size restrictions
						$thisfile_id3v2['exthead']['flags']['restrictions']['imgenc']   = ($restrictions_raw & 0x04) >> 2; // s - Image encoding restrictions
						$thisfile_id3v2['exthead']['flags']['restrictions']['imgsize']  = ($restrictions_raw & 0x03) >> 0; // t - Image size restrictions

$thisfile_id3v2['exthead']['flags']['restrictions_text']['tagsize']  = $this->LookupExtendedHeaderRestrictionsTagSizeLimits($thisfile_id3v2['exthead']['flags']['restrictions']['tagsize']);
						$thisfile_id3v2['exthead']['flags']['restrictions_text']['textenc']  = $this->LookupExtendedHeaderRestrictionsTextEncodings($thisfile_id3v2['exthead']['flags']['restrictions']['textenc']);
						$thisfile_id3v2['exthead']['flags']['restrictions_text']['textsize'] = $this->LookupExtendedHeaderRestrictionsTextFieldSize($thisfile_id3v2['exthead']['flags']['restrictions']['textsize']);
						$thisfile_id3v2['exthead']['flags']['restrictions_text']['imgenc']   = $this->LookupExtendedHeaderRestrictionsImageEncoding($thisfile_id3v2['exthead']['flags']['restrictions']['imgenc']);
						$thisfile_id3v2['exthead']['flags']['restrictions_text']['imgsize']  = $this->LookupExtendedHeaderRestrictionsImageSizeSize($thisfile_id3v2['exthead']['flags']['restrictions']['imgsize']);
					}

if ($thisfile_id3v2['exthead']['length'] != $extended_header_offset) {
						$this->warning('ID3v2.4 extended header length mismatch (expecting '.intval($thisfile_id3v2['exthead']['length']).', found '.intval($extended_header_offset).')');
					}
				}

$framedataoffset += $extended_header_offset;
				$framedata = substr($framedata, $extended_header_offset);
			} // end extended header

while (isset($framedata) && (strlen($framedata) > 0)) { // cycle through until no more frame data is left to parse
				if (strlen($framedata) <= $this->ID3v2HeaderLength($id3v2_majorversion)) {
					// insufficient room left in ID3v2 header for actual data - must be padding
					$thisfile_id3v2['padding']['start']  = $framedataoffset;
					$thisfile_id3v2['padding']['length'] = strlen($framedata);
					$thisfile_id3v2['padding']['valid']  = true;
					for ($i = 0; $i < $thisfile_id3v2['padding']['length']; $i++) {
						if ($framedata[$i] != "\x00") {
							$thisfile_id3v2['padding']['valid'] = false;
							$thisfile_id3v2['padding']['errorpos'] = $thisfile_id3v2['padding']['start'] + $i;
							$this->warning('Invalid ID3v2 padding found at offset '.$thisfile_id3v2['padding']['errorpos'].' (the remaining '.($thisfile_id3v2['padding']['length'] - $i).' bytes are considered invalid)');
							break;
						}
					}
					break; // skip rest of ID3v2 header
				}
				$frame_header = null;
				$frame_name   = null;
				$frame_size   = null;
				$frame_flags  = null;
				if ($id3v2_majorversion == 2) {
					// Frame ID  $xx xx xx (three characters)
					// Size      $xx xx xx (24-bit integer)
					// Flags     $xx xx

$frame_header = substr($framedata, 0, 6); // take next 6 bytes for header
					$framedata    = substr($framedata, 6);    // and leave the rest in $framedata
					$frame_name   = substr($frame_header, 0, 3);
					$frame_size   = getid3_lib::BigEndian2Int(substr($frame_header, 3, 3), 0);
					$frame_flags  = 0; // not used for anything in ID3v2.2, just set to avoid E_NOTICEs

} elseif ($id3v2_majorversion > 2) {

// Frame ID  $xx xx xx xx (four characters)
					// Size      $xx xx xx xx (32-bit integer in v2.3, 28-bit synchsafe in v2.4+)
					// Flags     $xx xx

$frame_header = substr($framedata, 0, 10); // take next 10 bytes for header
					$framedata    = substr($framedata, 10);    // and leave the rest in $framedata

$frame_name = substr($frame_header, 0, 4);
					if ($id3v2_majorversion == 3) {
						$frame_size = getid3_lib::BigEndian2Int(substr($frame_header, 4, 4), 0); // 32-bit integer
					} else { // ID3v2.4+
						$frame_size = getid3_lib::BigEndian2Int(substr($frame_header, 4, 4), 1); // 32-bit synchsafe integer (28-bit value)
					}

if ($frame_size < (strlen($framedata) + 4)) {
						$nextFrameID = substr($framedata, $frame_size, 4);
						if ($this->IsValidID3v2FrameName($nextFrameID, $id3v2_majorversion)) {
							// next frame is OK
						} elseif (($frame_name == "\x00".'MP3') || ($frame_name == "\x00\x00".'MP') || ($frame_name == ' MP3') || ($frame_name == 'MP3e')) {
							// MP3ext known broken frames - "ok" for the purposes of this test
						} elseif (($id3v2_majorversion == 4) && ($this->IsValidID3v2FrameName(substr($framedata, getid3_lib::BigEndian2Int(substr($frame_header, 4, 4), 0), 4), 3))) {
							$this->warning('ID3v2 tag written as ID3v2.4, but with non-synchsafe integers (ID3v2.3 style). Older versions of (Helium2; iTunes) are known culprits of this. Tag has been parsed as ID3v2.3');
							$id3v2_majorversion = 3;
							$frame_size = getid3_lib::BigEndian2Int(substr($frame_header, 4, 4), 0); // 32-bit integer
						}
					}

$frame_flags = getid3_lib::BigEndian2Int(substr($frame_header, 8, 2));
				}

if ((($id3v2_majorversion == 2) && ($frame_name == "\x00\x00\x00")) || ($frame_name == "\x00\x00\x00\x00")) {
					// padding encountered

$thisfile_id3v2['padding']['start']  = $framedataoffset;
					$thisfile_id3v2['padding']['length'] = strlen($frame_header) + strlen($framedata);
					$thisfile_id3v2['padding']['valid']  = true;

$len = strlen($framedata);
					for ($i = 0; $i < $len; $i++) {
						if ($framedata[$i] != "\x00") {
							$thisfile_id3v2['padding']['valid'] = false;
							$thisfile_id3v2['padding']['errorpos'] = $thisfile_id3v2['padding']['start'] + $i;
							$this->warning('Invalid ID3v2 padding found at offset '.$thisfile_id3v2['padding']['errorpos'].' (the remaining '.($thisfile_id3v2['padding']['length'] - $i).' bytes are considered invalid)');
							break;
						}
					}
					break; // skip rest of ID3v2 header
				}

if ($iTunesBrokenFrameNameFixed = self::ID3v22iTunesBrokenFrameName($frame_name)) {
					$this->warning('error parsing "'.$frame_name.'" ('.$framedataoffset.' bytes into the ID3v2.'.$id3v2_majorversion.' tag). (ERROR: IsValidID3v2FrameName("'.str_replace("\x00", ' ', $frame_name).'", '.$id3v2_majorversion.'))). [Note: this particular error has been known to happen with tags edited by iTunes (versions "X v2.0.3", "v3.0.1", "v7.0.0.70" are known-guilty, probably others too)]. Translated frame name from "'.str_replace("\x00", ' ', $frame_name).'" to "'.$iTunesBrokenFrameNameFixed.'" for parsing.');
					$frame_name = $iTunesBrokenFrameNameFixed;
				}
				if (($frame_size <= strlen($framedata)) && ($this->IsValidID3v2FrameName($frame_name, $id3v2_majorversion))) {

$parsedFrame                    = array();
					$parsedFrame['frame_name']      = $frame_name;
					$parsedFrame['frame_flags_raw'] = $frame_flags;
					$parsedFrame['data']            = substr($framedata, 0, $frame_size);
					$parsedFrame['datalength']      = getid3_lib::CastAsInt($frame_size);
					$parsedFrame['dataoffset']      = $framedataoffset;

$this->ParseID3v2Frame($parsedFrame);
					$thisfile_id3v2[$frame_name][] = $parsedFrame;

$framedata = substr($framedata, $frame_size);

} else { // invalid frame length or FrameID

if ($frame_size <= strlen($framedata)) {

if ($this->IsValidID3v2FrameName(substr($framedata, $frame_size, 4), $id3v2_majorversion)) {

// next frame is valid, just skip the current frame
							$framedata = substr($framedata, $frame_size);
							$this->warning('Next ID3v2 frame is valid, skipping current frame.');

} else {

// next frame is invalid too, abort processing
							//unset($framedata);
							$framedata = null;
							$this->error('Next ID3v2 frame is also invalid, aborting processing.');

}

} elseif ($frame_size == strlen($framedata)) {

// this is the last frame, just skip
						$this->warning('This was the last ID3v2 frame.');

} else {

// next frame is invalid too, abort processing
						//unset($framedata);
						$framedata = null;
						$this->warning('Invalid ID3v2 frame size, aborting.');

}
					if (!$this->IsValidID3v2FrameName($frame_name, $id3v2_majorversion)) {

switch ($frame_name) {
							case "\x00\x00".'MP':
							case "\x00".'MP3':
							case ' MP3':
							case 'MP3e':
							case "\x00".'MP':
							case ' MP':
							case 'MP3':
								$this->warning('error parsing "'.$frame_name.'" ('.$framedataoffset.' bytes into the ID3v2.'.$id3v2_majorversion.' tag). (ERROR: !IsValidID3v2FrameName("'.str_replace("\x00", ' ', $frame_name).'", '.$id3v2_majorversion.'))). [Note: this particular error has been known to happen with tags edited by "MP3ext (www.mutschler.de/mp3ext/)"]');
								break;

default:
								$this->warning('error parsing "'.$frame_name.'" ('.$framedataoffset.' bytes into the ID3v2.'.$id3v2_majorversion.' tag). (ERROR: !IsValidID3v2FrameName("'.str_replace("\x00", ' ', $frame_name).'", '.$id3v2_majorversion.'))).');
								break;
						}

} elseif (!isset($framedata) || ($frame_size > strlen($framedata))) {

$this->error('error parsing "'.$frame_name.'" ('.$framedataoffset.' bytes into the ID3v2.'.$id3v2_majorversion.' tag). (ERROR: $frame_size ('.$frame_size.') > strlen($framedata) ('.(isset($framedata) ? strlen($framedata) : 'null').')).');

} else {

$this->error('error parsing "'.$frame_name.'" ('.$framedataoffset.' bytes into the ID3v2.'.$id3v2_majorversion.' tag).');

}

}
				$framedataoffset += ($frame_size + $this->ID3v2HeaderLength($id3v2_majorversion));

}

//    Footer

//    The footer is a copy of the header, but with a different identifier.
	//        ID3v2 identifier           "3DI"
	//        ID3v2 version              $04 00
	//        ID3v2 flags                %abcd0000
	//        ID3v2 size             4 * %0xxxxxxx

if (isset($thisfile_id3v2_flags['isfooter']) && $thisfile_id3v2_flags['isfooter']) {
			$footer = $this->fread(10);
			if (substr($footer, 0, 3) == '3DI') {
				$thisfile_id3v2['footer'] = true;
				$thisfile_id3v2['majorversion_footer'] = ord($footer[3]);
				$thisfile_id3v2['minorversion_footer'] = ord($footer[4]);
			}
			if ($thisfile_id3v2['majorversion_footer'] <= 4) {
				$id3_flags = ord($footer[5]);
				$thisfile_id3v2_flags['unsynch_footer']  = (bool) ($id3_flags & 0x80);
				$thisfile_id3v2_flags['extfoot_footer']  = (bool) ($id3_flags & 0x40);
				$thisfile_id3v2_flags['experim_footer']  = (bool) ($id3_flags & 0x20);
				$thisfile_id3v2_flags['isfooter_footer'] = (bool) ($id3_flags & 0x10);

$thisfile_id3v2['footerlength'] = getid3_lib::BigEndian2Int(substr($footer, 6, 4), 1);
			}
		} // end footer

if (isset($thisfile_id3v2['comments']['genre'])) {
			$genres = array();
			foreach ($thisfile_id3v2['comments']['genre'] as $key => $value) {
				foreach ($this->ParseID3v2GenreString($value) as $genre) {
					$genres[] = $genre;
				}
			}
			$thisfile_id3v2['comments']['genre'] = array_unique($genres);
			unset($key, $value, $genres, $genre);
		}

if (isset($thisfile_id3v2['comments']['track_number'])) {
			foreach ($thisfile_id3v2['comments']['track_number'] as $key => $value) {
				if (strstr($value, '/')) {
					list($thisfile_id3v2['comments']['track_number'][$key], $thisfile_id3v2['comments']['totaltracks'][$key]) = explode('/', $thisfile_id3v2['comments']['track_number'][$key]);
				}
			}
		}

if (!isset($thisfile_id3v2['comments']['year']) && !empty($thisfile_id3v2['comments']['recording_time'][0]) && preg_match('#^([0-9]{4})#', trim($thisfile_id3v2['comments']['recording_time'][0]), $matches)) {
			$thisfile_id3v2['comments']['year'] = array($matches[1]);
		}

if (!empty($thisfile_id3v2['TXXX'])) {
			// MediaMonkey does this, maybe others: write a blank RGAD frame, but put replay-gain adjustment values in TXXX frames
			foreach ($thisfile_id3v2['TXXX'] as $txxx_array) {
				switch ($txxx_array['description']) {
					case 'replaygain_track_gain':
						if (empty($info['replay_gain']['track']['adjustment']) && !empty($txxx_array['data'])) {
							$info['replay_gain']['track']['adjustment'] = floatval(trim(str_replace('dB', '', $txxx_array['data'])));
						}
						break;
					case 'replaygain_track_peak':
						if (empty($info['replay_gain']['track']['peak']) && !empty($txxx_array['data'])) {
							$info['replay_gain']['track']['peak'] = floatval($txxx_array['data']);
						}
						break;
					case 'replaygain_album_gain':
						if (empty($info['replay_gain']['album']['adjustment']) && !empty($txxx_array['data'])) {
							$info['replay_gain']['album']['adjustment'] = floatval(trim(str_replace('dB', '', $txxx_array['data'])));
						}
						break;
				}
			}
		}

// Set avdataoffset
		$info['avdataoffset'] = $thisfile_id3v2['headerlength'];
		if (isset($thisfile_id3v2['footer'])) {
			$info['avdataoffset'] += 10;
		}

return true;
	}

/**
	 * @param string $genrestring
	 *
	 * @return array
	 */
	public function ParseID3v2GenreString($genrestring) {
		// Parse genres into arrays of genreName and genreID
		// ID3v2.2.x, ID3v2.3.x: '(21)' or '(4)Eurodisco' or '(51)(39)' or '(55)((I think...)'
		// ID3v2.4.x: '21' $00 'Eurodisco' $00
		$clean_genres = array();

// hack-fixes for some badly-written ID3v2.3 taggers, while trying not to break correctly-written tags
		if (($this->getid3->info['id3v2']['majorversion'] == 3) && !preg_match('#[\x00]#', $genrestring)) {
			// note: MusicBrainz Picard incorrectly stores plaintext genres separated by "/" when writing in ID3v2.3 mode, hack-fix here:
			// replace / with NULL, then replace back the two ID3v1 genres that legitimately have "/" as part of the single genre name
			if (strpos($genrestring, '/') !== false) {
				$LegitimateSlashedGenreList = array(  // https://github.com/JamesHeinrich/getID3/issues/223
					'Pop/Funk',    // ID3v1 genre #62 - https://en.wikipedia.org/wiki/ID3#standard
					'Cut-up/DJ',   // Discogs - https://www.discogs.com/style/cut-up/dj
					'RnB/Swing',   // Discogs - https://www.discogs.com/style/rnb/swing
					'Funk / Soul', // Discogs (note spaces) - https://www.discogs.com/genre/funk+%2F+soul
				);
				$genrestring = str_replace('/', "\x00", $genrestring);
				foreach ($LegitimateSlashedGenreList as $SlashedGenre) {
					$genrestring = str_ireplace(str_replace('/', "\x00", $SlashedGenre), $SlashedGenre, $genrestring);
				}
			}

// some other taggers separate multiple genres with semicolon, e.g. "Heavy Metal;Thrash Metal;Metal"
			if (strpos($genrestring, ';') !== false) {
				$genrestring = str_replace(';', "\x00", $genrestring);
			}
		}

if (strpos($genrestring, "\x00") === false) {
			$genrestring = preg_replace('#$([0-9]{1,3})$#', '$1'."\x00", $genrestring);
		}

$genre_elements = explode("\x00", $genrestring);
		foreach ($genre_elements as $element) {
			$element = trim($element);
			if ($element) {
				if (preg_match('#^[0-9]{1,3}$#', $element)) {
					$clean_genres[] = getid3_id3v1::LookupGenreName($element);
				} else {
					$clean_genres[] = str_replace('((', '(', $element);
				}
			}
		}
		return $clean_genres;
	}

/**
	 * @param array $parsedFrame
	 *
	 * @return bool
	 */
	public function ParseID3v2Frame(&$parsedFrame) {

// shortcuts
		$info = &$this->getid3->info;
		$id3v2_majorversion = $info['id3v2']['majorversion'];

$parsedFrame['framenamelong']  = $this->FrameNameLongLookup($parsedFrame['frame_name']);
		if (empty($parsedFrame['framenamelong'])) {
			unset($parsedFrame['framenamelong']);
		}
		$parsedFrame['framenameshort'] = $this->FrameNameShortLookup($parsedFrame['frame_name']);
		if (empty($parsedFrame['framenameshort'])) {
			unset($parsedFrame['framenameshort']);
		}

if ($id3v2_majorversion >= 3) { // frame flags are not part of the ID3v2.2 standard
			if ($id3v2_majorversion == 3) {
				//    Frame Header Flags
				//    %abc00000 %ijk00000
				$parsedFrame['flags']['TagAlterPreservation']  = (bool) ($parsedFrame['frame_flags_raw'] & 0x8000); // a - Tag alter preservation
				$parsedFrame['flags']['FileAlterPreservation'] = (bool) ($parsedFrame['frame_flags_raw'] & 0x4000); // b - File alter preservation
				$parsedFrame['flags']['ReadOnly']              = (bool) ($parsedFrame['frame_flags_raw'] & 0x2000); // c - Read only
				$parsedFrame['flags']['compression']           = (bool) ($parsedFrame['frame_flags_raw'] & 0x0080); // i - Compression
				$parsedFrame['flags']['Encryption']            = (bool) ($parsedFrame['frame_flags_raw'] & 0x0040); // j - Encryption
				$parsedFrame['flags']['GroupingIdentity']      = (bool) ($parsedFrame['frame_flags_raw'] & 0x0020); // k - Grouping identity

} elseif ($id3v2_majorversion == 4) {
				//    Frame Header Flags
				//    %0abc0000 %0h00kmnp
				$parsedFrame['flags']['TagAlterPreservation']  = (bool) ($parsedFrame['frame_flags_raw'] & 0x4000); // a - Tag alter preservation
				$parsedFrame['flags']['FileAlterPreservation'] = (bool) ($parsedFrame['frame_flags_raw'] & 0x2000); // b - File alter preservation
				$parsedFrame['flags']['ReadOnly']              = (bool) ($parsedFrame['frame_flags_raw'] & 0x1000); // c - Read only
				$parsedFrame['flags']['GroupingIdentity']      = (bool) ($parsedFrame['frame_flags_raw'] & 0x0040); // h - Grouping identity
				$parsedFrame['flags']['compression']           = (bool) ($parsedFrame['frame_flags_raw'] & 0x0008); // k - Compression
				$parsedFrame['flags']['Encryption']            = (bool) ($parsedFrame['frame_flags_raw'] & 0x0004); // m - Encryption
				$parsedFrame['flags']['Unsynchronisation']     = (bool) ($parsedFrame['frame_flags_raw'] & 0x0002); // n - Unsynchronisation
				$parsedFrame['flags']['DataLengthIndicator']   = (bool) ($parsedFrame['frame_flags_raw'] & 0x0001); // p - Data length indicator

// Frame-level de-unsynchronisation - ID3v2.4
				if ($parsedFrame['flags']['Unsynchronisation']) {
					$parsedFrame['data'] = $this->DeUnsynchronise($parsedFrame['data']);
				}

if ($parsedFrame['flags']['DataLengthIndicator']) {
					$parsedFrame['data_length_indicator'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], 0, 4), 1);
					$parsedFrame['data']                  =                           substr($parsedFrame['data'], 4);
				}
			}

//    Frame-level de-compression
			if ($parsedFrame['flags']['compression']) {
				$parsedFrame['decompressed_size'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], 0, 4));
				if (!function_exists('gzuncompress')) {
					$this->warning('gzuncompress() support required to decompress ID3v2 frame "'.$parsedFrame['frame_name'].'"');
				} else {
					if ($decompresseddata = @gzuncompress(substr($parsedFrame['data'], 4))) {
					//if ($decompresseddata = @gzuncompress($parsedFrame['data'])) {
						$parsedFrame['data'] = $decompresseddata;
						unset($decompresseddata);
					} else {
						$this->warning('gzuncompress() failed on compressed contents of ID3v2 frame "'.$parsedFrame['frame_name'].'"');
					}
				}
			}
		}

if (!empty($parsedFrame['flags']['DataLengthIndicator'])) {
			if ($parsedFrame['data_length_indicator'] != strlen($parsedFrame['data'])) {
				$this->warning('ID3v2 frame "'.$parsedFrame['frame_name'].'" should be '.$parsedFrame['data_length_indicator'].' bytes long according to DataLengthIndicator, but found '.strlen($parsedFrame['data']).' bytes of data');
			}
		}

if (isset($parsedFrame['datalength']) && ($parsedFrame['datalength'] == 0)) {

$warning = 'Frame "'.$parsedFrame['frame_name'].'" at offset '.$parsedFrame['dataoffset'].' has no data portion';
			switch ($parsedFrame['frame_name']) {
				case 'WCOM':
					$warning .= ' (this is known to happen with files tagged by RioPort)';
					break;

default:
					break;
			}
			$this->warning($warning);

} elseif ((($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'UFID')) || // 4.1   UFID Unique file identifier
			(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'UFI'))) {  // 4.1   UFI  Unique file identifier
			//   There may be more than one 'UFID' frame in a tag,
			//   but only one with the same 'Owner identifier'.
			// <Header for 'Unique file identifier', ID: 'UFID'>
			// Owner identifier        <text string> $00
			// Identifier              <up to 64 bytes binary data>
			$exploded = explode("\x00", $parsedFrame['data'], 2);
			$parsedFrame['ownerid'] = $exploded[0];
			$parsedFrame['data']    = (isset($exploded[1]) ? $exploded[1] : '');

} elseif ((($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'TXXX')) || // 4.2.2 TXXX User defined text information frame
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'TXX'))) {    // 4.2.2 TXX  User defined text information frame
			//   There may be more than one 'TXXX' frame in each tag,
			//   but only one with the same description.
			// <Header for 'User defined text information frame', ID: 'TXXX'>
			// Text encoding     $xx
			// Description       <text string according to encoding> $00 (00)
			// Value             <text string according to encoding>

$frame_offset = 0;
			$frame_textencoding = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$frame_textencoding_terminator = $this->TextEncodingTerminatorLookup($frame_textencoding);
			if ((($id3v2_majorversion <= 3) && ($frame_textencoding > 1)) || (($id3v2_majorversion == 4) && ($frame_textencoding > 3))) {
				$this->warning('Invalid text encoding byte ('.$frame_textencoding.') in frame "'.$parsedFrame['frame_name'].'" - defaulting to ISO-8859-1 encoding');
				$frame_textencoding_terminator = "\x00";
			}
			$frame_terminatorpos = strpos($parsedFrame['data'], $frame_textencoding_terminator, $frame_offset);
			if (ord(substr($parsedFrame['data'], $frame_terminatorpos + strlen($frame_textencoding_terminator), 1)) === 0) {
				$frame_terminatorpos++; // strpos() fooled because 2nd byte of Unicode chars are often 0x00
			}
			$parsedFrame['description'] = substr($parsedFrame['data'], $frame_offset, $frame_terminatorpos - $frame_offset);
			$parsedFrame['description'] = $this->MakeUTF16emptyStringEmpty($parsedFrame['description']);
			$parsedFrame['encodingid']  = $frame_textencoding;
			$parsedFrame['encoding']    = $this->TextEncodingNameLookup($frame_textencoding);

$parsedFrame['description'] = trim(getid3_lib::iconv_fallback($parsedFrame['encoding'], $info['id3v2']['encoding'], $parsedFrame['description']));
			$parsedFrame['data'] = substr($parsedFrame['data'], $frame_terminatorpos + strlen($frame_textencoding_terminator));
			$parsedFrame['data'] = $this->RemoveStringTerminator($parsedFrame['data'], $frame_textencoding_terminator);
			if (!empty($parsedFrame['framenameshort']) && !empty($parsedFrame['data'])) {
				$commentkey = ($parsedFrame['description'] ? $parsedFrame['description'] : (isset($info['id3v2']['comments'][$parsedFrame['framenameshort']]) ? count($info['id3v2']['comments'][$parsedFrame['framenameshort']]) : 0));
				if (!isset($info['id3v2']['comments'][$parsedFrame['framenameshort']]) || !array_key_exists($commentkey, $info['id3v2']['comments'][$parsedFrame['framenameshort']])) {
					$info['id3v2']['comments'][$parsedFrame['framenameshort']][$commentkey] = trim(getid3_lib::iconv_fallback($parsedFrame['encoding'], $info['id3v2']['encoding'], $parsedFrame['data']));
				} else {
					$info['id3v2']['comments'][$parsedFrame['framenameshort']][]            = trim(getid3_lib::iconv_fallback($parsedFrame['encoding'], $info['id3v2']['encoding'], $parsedFrame['data']));
				}
			}
			//unset($parsedFrame['data']); do not unset, may be needed elsewhere, e.g. for replaygain

} elseif ($parsedFrame['frame_name'][0] == 'T') { // 4.2. T??[?] Text information frame
			//   There may only be one text information frame of its kind in an tag.
			// <Header for 'Text information frame', ID: 'T000' - 'TZZZ',
			// excluding 'TXXX' described in 4.2.6.>
			// Text encoding                $xx
			// Information                  <text string(s) according to encoding>

$parsedFrame['encodingid'] = $frame_textencoding;
			$parsedFrame['encoding']   = $this->TextEncodingNameLookup($frame_textencoding);
			if (!empty($parsedFrame['framenameshort']) && !empty($parsedFrame['data'])) {
				// ID3v2.3 specs say that TPE1 (and others) can contain multiple artist values separated with /
				// This of course breaks when an artist name contains slash character, e.g. "AC/DC"
				// MP3tag (maybe others) implement alternative system where multiple artists are null-separated, which makes more sense
				// getID3 will split null-separated artists into multiple artists and leave slash-separated ones to the user
				switch ($parsedFrame['encoding']) {
					case 'UTF-16':
					case 'UTF-16BE':
					case 'UTF-16LE':
						$wordsize = 2;
						break;
					case 'ISO-8859-1':
					case 'UTF-8':
					default:
						$wordsize = 1;
						break;
				}
				$Txxx_elements = array();
				$Txxx_elements_start_offset = 0;
				for ($i = 0; $i < strlen($parsedFrame['data']); $i += $wordsize) {
					if (substr($parsedFrame['data'], $i, $wordsize) == str_repeat("\x00", $wordsize)) {
						$Txxx_elements[] = substr($parsedFrame['data'], $Txxx_elements_start_offset, $i - $Txxx_elements_start_offset);
						$Txxx_elements_start_offset = $i + $wordsize;
					}
				}
				$Txxx_elements[] = substr($parsedFrame['data'], $Txxx_elements_start_offset, $i - $Txxx_elements_start_offset);
				foreach ($Txxx_elements as $Txxx_element) {
					$string = getid3_lib::iconv_fallback($parsedFrame['encoding'], $info['id3v2']['encoding'], $Txxx_element);
					if (!empty($string)) {
						$info['id3v2']['comments'][$parsedFrame['framenameshort']][] = $string;
					}
				}
				unset($string, $wordsize, $i, $Txxx_elements, $Txxx_element, $Txxx_elements_start_offset);
			}

} elseif ((($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'WXXX')) || // 4.3.2 WXXX User defined URL link frame
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'WXX'))) {    // 4.3.2 WXX  User defined URL link frame
			//   There may be more than one 'WXXX' frame in each tag,
			//   but only one with the same description
			// <Header for 'User defined URL link frame', ID: 'WXXX'>
			// Text encoding     $xx
			// Description       <text string according to encoding> $00 (00)
			// URL               <text string>

$frame_offset = 0;
			$frame_textencoding = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$frame_textencoding_terminator = $this->TextEncodingTerminatorLookup($frame_textencoding);
			if ((($id3v2_majorversion <= 3) && ($frame_textencoding > 1)) || (($id3v2_majorversion == 4) && ($frame_textencoding > 3))) {
				$this->warning('Invalid text encoding byte ('.$frame_textencoding.') in frame "'.$parsedFrame['frame_name'].'" - defaulting to ISO-8859-1 encoding');
				$frame_textencoding_terminator = "\x00";
			}
			$frame_terminatorpos = strpos($parsedFrame['data'], $frame_textencoding_terminator, $frame_offset);
			if (ord(substr($parsedFrame['data'], $frame_terminatorpos + strlen($frame_textencoding_terminator), 1)) === 0) {
				$frame_terminatorpos++; // strpos() fooled because 2nd byte of Unicode chars are often 0x00
			}
			$parsedFrame['encodingid']  = $frame_textencoding;
			$parsedFrame['encoding']    = $this->TextEncodingNameLookup($frame_textencoding);
			$parsedFrame['description'] = substr($parsedFrame['data'], $frame_offset, $frame_terminatorpos - $frame_offset);           // according to the frame text encoding
			$parsedFrame['url']         = substr($parsedFrame['data'], $frame_terminatorpos + strlen($frame_textencoding_terminator)); // always ISO-8859-1
			$parsedFrame['description'] = $this->RemoveStringTerminator($parsedFrame['description'], $frame_textencoding_terminator);
			$parsedFrame['description'] = $this->MakeUTF16emptyStringEmpty($parsedFrame['description']);

if (!empty($parsedFrame['framenameshort']) && $parsedFrame['url']) {
				$info['id3v2']['comments'][$parsedFrame['framenameshort']][] = getid3_lib::iconv_fallback('ISO-8859-1', $info['id3v2']['encoding'], $parsedFrame['url']);
			}
			unset($parsedFrame['data']);

} elseif ($parsedFrame['frame_name'][0] == 'W') { // 4.3. W??? URL link frames
			//   There may only be one URL link frame of its kind in a tag,
			//   except when stated otherwise in the frame description
			// <Header for 'URL link frame', ID: 'W000' - 'WZZZ', excluding 'WXXX'
			// described in 4.3.2.>
			// URL              <text string>

$parsedFrame['url'] = trim($parsedFrame['data']); // always ISO-8859-1
			if (!empty($parsedFrame['framenameshort']) && $parsedFrame['url']) {
				$info['id3v2']['comments'][$parsedFrame['framenameshort']][] = getid3_lib::iconv_fallback('ISO-8859-1', $info['id3v2']['encoding'], $parsedFrame['url']);
			}
			unset($parsedFrame['data']);

} elseif ((($id3v2_majorversion == 3) && ($parsedFrame['frame_name'] == 'IPLS')) || // 4.4  IPLS Involved people list (ID3v2.3 only)
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'IPL'))) {     // 4.4  IPL  Involved people list (ID3v2.2 only)
			// http://id3.org/id3v2.3.0#sec4.4
			//   There may only be one 'IPL' frame in each tag
			// <Header for 'User defined URL link frame', ID: 'IPL'>
			// Text encoding     $xx
			// People list strings    <textstrings>

$frame_offset = 0;
			$frame_textencoding = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			if ((($id3v2_majorversion <= 3) && ($frame_textencoding > 1)) || (($id3v2_majorversion == 4) && ($frame_textencoding > 3))) {
				$this->warning('Invalid text encoding byte ('.$frame_textencoding.') in frame "'.$parsedFrame['frame_name'].'" - defaulting to ISO-8859-1 encoding');
			}
			$parsedFrame['encodingid'] = $frame_textencoding;
			$parsedFrame['encoding']   = $this->TextEncodingNameLookup($parsedFrame['encodingid']);
			$parsedFrame['data_raw']   = (string) substr($parsedFrame['data'], $frame_offset);

// https://www.getid3.org/phpBB3/viewtopic.php?t=1369
			// "this tag typically contains null terminated strings, which are associated in pairs"
			// "there are users that use the tag incorrectly"
			$IPLS_parts = array();
			if (strpos($parsedFrame['data_raw'], "\x00") !== false) {
				$IPLS_parts_unsorted = array();
				if (((strlen($parsedFrame['data_raw']) % 2) == 0) && ((substr($parsedFrame['data_raw'], 0, 2) == "\xFF\xFE") || (substr($parsedFrame['data_raw'], 0, 2) == "\xFE\xFF"))) {
					// UTF-16, be careful looking for null bytes since most 2-byte characters may contain one; you need to find twin null bytes, and on even padding
					$thisILPS  = '';
					for ($i = 0; $i < strlen($parsedFrame['data_raw']); $i += 2) {
						$twobytes = substr($parsedFrame['data_raw'], $i, 2);
						if ($twobytes === "\x00\x00") {
							$IPLS_parts_unsorted[] = getid3_lib::iconv_fallback($parsedFrame['encoding'], $info['id3v2']['encoding'], $thisILPS);
							$thisILPS  = '';
						} else {
							$thisILPS .= $twobytes;
						}
					}
					if (strlen($thisILPS) > 2) { // 2-byte BOM
						$IPLS_parts_unsorted[] = getid3_lib::iconv_fallback($parsedFrame['encoding'], $info['id3v2']['encoding'], $thisILPS);
					}
				} else {
					// ISO-8859-1 or UTF-8 or other single-byte-null character set
					$IPLS_parts_unsorted = explode("\x00", $parsedFrame['data_raw']);
				}
				if (count($IPLS_parts_unsorted) == 1) {
					// just a list of names, e.g. "Dino Baptiste, Jimmy Copley, John Gordon, Bernie Marsden, Sharon Watson"
					foreach ($IPLS_parts_unsorted as $key => $value) {
						$IPLS_parts_sorted = preg_split('#[;,\\r\\n\\t]#', $value);
						$position = '';
						foreach ($IPLS_parts_sorted as $person) {
							$IPLS_parts[] = array('position'=>$position, 'person'=>$person);
						}
					}
				} elseif ((count($IPLS_parts_unsorted) % 2) == 0) {
					$position = '';
					$person   = '';
					foreach ($IPLS_parts_unsorted as $key => $value) {
						if (($key % 2) == 0) {
							$position = $value;
						} else {
							$person   = $value;
							$IPLS_parts[] = array('position'=>$position, 'person'=>$person);
							$position = '';
							$person   = '';
						}
					}
				} else {
					foreach ($IPLS_parts_unsorted as $key => $value) {
						$IPLS_parts[] = array($value);
					}
				}

} else {
				$IPLS_parts = preg_split('#[;,\\r\\n\\t]#', $parsedFrame['data_raw']);
			}
			$parsedFrame['data'] = $IPLS_parts;

if (!empty($parsedFrame['framenameshort']) && !empty($parsedFrame['data'])) {
				$info['id3v2']['comments'][$parsedFrame['framenameshort']][] = $parsedFrame['data'];
			}

} elseif ((($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'MCDI')) || // 4.4   MCDI Music CD identifier
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'MCI'))) {     // 4.5   MCI  Music CD identifier
			//   There may only be one 'MCDI' frame in each tag
			// <Header for 'Music CD identifier', ID: 'MCDI'>
			// CD TOC                <binary data>

if (!empty($parsedFrame['framenameshort']) && !empty($parsedFrame['data'])) {
				$info['id3v2']['comments'][$parsedFrame['framenameshort']][] = $parsedFrame['data'];
			}

} elseif ((($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'ETCO')) || // 4.5   ETCO Event timing codes
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'ETC'))) {     // 4.6   ETC  Event timing codes
			//   There may only be one 'ETCO' frame in each tag
			// <Header for 'Event timing codes', ID: 'ETCO'>
			// Time stamp format    $xx
			//   Where time stamp format is:
			// $01  (32-bit value) MPEG frames from beginning of file
			// $02  (32-bit value) milliseconds from beginning of file
			//   Followed by a list of key events in the following format:
			// Type of event   $xx
			// Time stamp      $xx (xx ...)
			//   The 'Time stamp' is set to zero if directly at the beginning of the sound
			//   or after the previous event. All events MUST be sorted in chronological order.

$frame_offset = 0;
			$parsedFrame['timestampformat'] = ord(substr($parsedFrame['data'], $frame_offset++, 1));

while ($frame_offset < strlen($parsedFrame['data'])) {
				$parsedFrame['typeid']    = substr($parsedFrame['data'], $frame_offset++, 1);
				$parsedFrame['type']      = $this->ETCOEventLookup($parsedFrame['typeid']);
				$parsedFrame['timestamp'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, 4));
				$frame_offset += 4;
			}
			unset($parsedFrame['data']);

} elseif ((($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'MLLT')) || // 4.6   MLLT MPEG location lookup table
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'MLL'))) {     // 4.7   MLL MPEG location lookup table
			//   There may only be one 'MLLT' frame in each tag
			// <Header for 'Location lookup table', ID: 'MLLT'>
			// MPEG frames between reference  $xx xx
			// Bytes between reference        $xx xx xx
			// Milliseconds between reference $xx xx xx
			// Bits for bytes deviation       $xx
			// Bits for milliseconds dev.     $xx
			//   Then for every reference the following data is included;
			// Deviation in bytes         %xxx....
			// Deviation in milliseconds  %xxx....

$frame_offset = 0;
			$parsedFrame['framesbetweenreferences'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], 0, 2));
			$parsedFrame['bytesbetweenreferences']  = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], 2, 3));
			$parsedFrame['msbetweenreferences']     = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], 5, 3));
			$parsedFrame['bitsforbytesdeviation']   = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], 8, 1));
			$parsedFrame['bitsformsdeviation']      = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], 9, 1));
			$parsedFrame['data'] = substr($parsedFrame['data'], 10);
			$deviationbitstream = '';
			while ($frame_offset < strlen($parsedFrame['data'])) {
				$deviationbitstream .= getid3_lib::BigEndian2Bin(substr($parsedFrame['data'], $frame_offset++, 1));
			}
			$reference_counter = 0;
			while (strlen($deviationbitstream) > 0) {
				$parsedFrame[$reference_counter]['bytedeviation'] = bindec(substr($deviationbitstream, 0, $parsedFrame['bitsforbytesdeviation']));
				$parsedFrame[$reference_counter]['msdeviation']   = bindec(substr($deviationbitstream, $parsedFrame['bitsforbytesdeviation'], $parsedFrame['bitsformsdeviation']));
				$deviationbitstream = substr($deviationbitstream, $parsedFrame['bitsforbytesdeviation'] + $parsedFrame['bitsformsdeviation']);
				$reference_counter++;
			}
			unset($parsedFrame['data']);

} elseif ((($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'SYTC')) || // 4.7   SYTC Synchronised tempo codes
				  (($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'STC'))) {  // 4.8   STC  Synchronised tempo codes
			//   There may only be one 'SYTC' frame in each tag
			// <Header for 'Synchronised tempo codes', ID: 'SYTC'>
			// Time stamp format   $xx
			// Tempo data          <binary data>
			//   Where time stamp format is:
			// $01  (32-bit value) MPEG frames from beginning of file
			// $02  (32-bit value) milliseconds from beginning of file

$frame_offset = 0;
			$parsedFrame['timestampformat'] = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$timestamp_counter = 0;
			while ($frame_offset < strlen($parsedFrame['data'])) {
				$parsedFrame[$timestamp_counter]['tempo'] = ord(substr($parsedFrame['data'], $frame_offset++, 1));
				if ($parsedFrame[$timestamp_counter]['tempo'] == 255) {
					$parsedFrame[$timestamp_counter]['tempo'] += ord(substr($parsedFrame['data'], $frame_offset++, 1));
				}
				$parsedFrame[$timestamp_counter]['timestamp'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, 4));
				$frame_offset += 4;
				$timestamp_counter++;
			}
			unset($parsedFrame['data']);

} elseif ((($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'USLT')) || // 4.8   USLT Unsynchronised lyric/text transcription
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'ULT'))) {    // 4.9   ULT  Unsynchronised lyric/text transcription
			//   There may be more than one 'Unsynchronised lyrics/text transcription' frame
			//   in each tag, but only one with the same language and content descriptor.
			// <Header for 'Unsynchronised lyrics/text transcription', ID: 'USLT'>
			// Text encoding        $xx
			// Language             $xx xx xx
			// Content descriptor   <text string according to encoding> $00 (00)
			// Lyrics/text          <full text string according to encoding>

$frame_offset = 0;
			$frame_textencoding = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$frame_textencoding_terminator = $this->TextEncodingTerminatorLookup($frame_textencoding);
			if ((($id3v2_majorversion <= 3) && ($frame_textencoding > 1)) || (($id3v2_majorversion == 4) && ($frame_textencoding > 3))) {
				$this->warning('Invalid text encoding byte ('.$frame_textencoding.') in frame "'.$parsedFrame['frame_name'].'" - defaulting to ISO-8859-1 encoding');
				$frame_textencoding_terminator = "\x00";
			}
			if (strlen($parsedFrame['data']) >= (4 + strlen($frame_textencoding_terminator))) {  // shouldn't be an issue but badly-written files have been spotted in the wild with not only no contents but also missing the required language field, see https://github.com/JamesHeinrich/getID3/issues/315
				$frame_language = substr($parsedFrame['data'], $frame_offset, 3);
				$frame_offset += 3;
				$frame_terminatorpos = strpos($parsedFrame['data'], $frame_textencoding_terminator, $frame_offset);
				if (ord(substr($parsedFrame['data'], $frame_terminatorpos + strlen($frame_textencoding_terminator), 1)) === 0) {
					$frame_terminatorpos++; // strpos() fooled because 2nd byte of Unicode chars are often 0x00
				}
				$parsedFrame['description'] = substr($parsedFrame['data'], $frame_offset, $frame_terminatorpos - $frame_offset);
				$parsedFrame['description'] = $this->MakeUTF16emptyStringEmpty($parsedFrame['description']);
				$parsedFrame['data'] = substr($parsedFrame['data'], $frame_terminatorpos + strlen($frame_textencoding_terminator));
				$parsedFrame['data'] = $this->RemoveStringTerminator($parsedFrame['data'], $frame_textencoding_terminator);

$parsedFrame['encodingid']   = $frame_textencoding;
				$parsedFrame['encoding']     = $this->TextEncodingNameLookup($frame_textencoding);

$parsedFrame['language']     = $frame_language;
				$parsedFrame['languagename'] = $this->LanguageLookup($frame_language, false);
				if (!empty($parsedFrame['framenameshort']) && !empty($parsedFrame['data'])) {
					$info['id3v2']['comments'][$parsedFrame['framenameshort']][] = getid3_lib::iconv_fallback($parsedFrame['encoding'], $info['id3v2']['encoding'], $parsedFrame['data']);
				}
			} else {
				$this->warning('Invalid data in frame "'.$parsedFrame['frame_name'].'" at offset '.$parsedFrame['dataoffset']);
			}
			unset($parsedFrame['data']);

} elseif ((($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'SYLT')) || // 4.9   SYLT Synchronised lyric/text
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'SLT'))) {     // 4.10  SLT  Synchronised lyric/text
			//   There may be more than one 'SYLT' frame in each tag,
			//   but only one with the same language and content descriptor.
			// <Header for 'Synchronised lyrics/text', ID: 'SYLT'>
			// Text encoding        $xx
			// Language             $xx xx xx
			// Time stamp format    $xx
			//   $01  (32-bit value) MPEG frames from beginning of file
			//   $02  (32-bit value) milliseconds from beginning of file
			// Content type         $xx
			// Content descriptor   <text string according to encoding> $00 (00)
			//   Terminated text to be synced (typically a syllable)
			//   Sync identifier (terminator to above string)   $00 (00)
			//   Time stamp                                     $xx (xx ...)

$parsedFrame['language']        = $frame_language;
			$parsedFrame['languagename']    = $this->LanguageLookup($frame_language, false);

$timestampindex = 0;
			$frame_remainingdata = substr($parsedFrame['data'], $frame_offset);
			while (strlen($frame_remainingdata)) {
				$frame_offset = 0;
				$frame_terminatorpos = strpos($frame_remainingdata, $frame_textencoding_terminator);
				if ($frame_terminatorpos === false) {
					$frame_remainingdata = '';
				} else {
					if (ord(substr($frame_remainingdata, $frame_terminatorpos + strlen($frame_textencoding_terminator), 1)) === 0) {
						$frame_terminatorpos++; // strpos() fooled because 2nd byte of Unicode chars are often 0x00
					}
					$parsedFrame['lyrics'][$timestampindex]['data'] = substr($frame_remainingdata, $frame_offset, $frame_terminatorpos - $frame_offset);

$frame_remainingdata = substr($frame_remainingdata, $frame_terminatorpos + strlen($frame_textencoding_terminator));
					if (strlen($frame_remainingdata)) { // https://github.com/JamesHeinrich/getID3/issues/444
						if (($timestampindex == 0) && (ord($frame_remainingdata[0]) != 0)) {
							// timestamp probably omitted for first data item
						} else {
							$parsedFrame['lyrics'][$timestampindex]['timestamp'] = getid3_lib::BigEndian2Int(substr($frame_remainingdata, 0, 4));
							$frame_remainingdata = substr($frame_remainingdata, 4);
						}
						$timestampindex++;
					}
				}
			}
			unset($parsedFrame['data']);

} elseif ((($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'COMM')) || // 4.10  COMM Comments
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'COM'))) {     // 4.11  COM  Comments
			//   There may be more than one comment frame in each tag,
			//   but only one with the same language and content descriptor.
			// <Header for 'Comment', ID: 'COMM'>
			// Text encoding          $xx
			// Language               $xx xx xx
			// Short content descrip. <text string according to encoding> $00 (00)
			// The actual text        <full text string according to encoding>

if (strlen($parsedFrame['data']) < 5) {

$this->warning('Invalid data (too short) for "'.$parsedFrame['frame_name'].'" frame at offset '.$parsedFrame['dataoffset']);

} else {

$frame_offset = 0;
				$frame_textencoding = ord(substr($parsedFrame['data'], $frame_offset++, 1));
				$frame_textencoding_terminator = $this->TextEncodingTerminatorLookup($frame_textencoding);
				if ((($id3v2_majorversion <= 3) && ($frame_textencoding > 1)) || (($id3v2_majorversion == 4) && ($frame_textencoding > 3))) {
					$this->warning('Invalid text encoding byte ('.$frame_textencoding.') in frame "'.$parsedFrame['frame_name'].'" - defaulting to ISO-8859-1 encoding');
					$frame_textencoding_terminator = "\x00";
				}
				$frame_language = substr($parsedFrame['data'], $frame_offset, 3);
				$frame_offset += 3;
				$frame_terminatorpos = strpos($parsedFrame['data'], $frame_textencoding_terminator, $frame_offset);
				if (ord(substr($parsedFrame['data'], $frame_terminatorpos + strlen($frame_textencoding_terminator), 1)) === 0) {
					$frame_terminatorpos++; // strpos() fooled because 2nd byte of Unicode chars are often 0x00
				}
				$parsedFrame['description'] = substr($parsedFrame['data'], $frame_offset, $frame_terminatorpos - $frame_offset);
				$parsedFrame['description'] = $this->MakeUTF16emptyStringEmpty($parsedFrame['description']);
				$frame_text = (string) substr($parsedFrame['data'], $frame_terminatorpos + strlen($frame_textencoding_terminator));
				$frame_text = $this->RemoveStringTerminator($frame_text, $frame_textencoding_terminator);

$parsedFrame['encodingid']   = $frame_textencoding;
				$parsedFrame['encoding']     = $this->TextEncodingNameLookup($frame_textencoding);

$parsedFrame['language']     = $frame_language;
				$parsedFrame['languagename'] = $this->LanguageLookup($frame_language, false);
				$parsedFrame['data']         = $frame_text;
				if (!empty($parsedFrame['framenameshort']) && !empty($parsedFrame['data'])) {
					$commentkey = ($parsedFrame['description'] ? $parsedFrame['description'] : (!empty($info['id3v2']['comments'][$parsedFrame['framenameshort']]) ? count($info['id3v2']['comments'][$parsedFrame['framenameshort']]) : 0));
					if (!isset($info['id3v2']['comments'][$parsedFrame['framenameshort']]) || !array_key_exists($commentkey, $info['id3v2']['comments'][$parsedFrame['framenameshort']])) {
						$info['id3v2']['comments'][$parsedFrame['framenameshort']][$commentkey] = getid3_lib::iconv_fallback($parsedFrame['encoding'], $info['id3v2']['encoding'], $parsedFrame['data']);
					} else {
						$info['id3v2']['comments'][$parsedFrame['framenameshort']][]            = getid3_lib::iconv_fallback($parsedFrame['encoding'], $info['id3v2']['encoding'], $parsedFrame['data']);
					}
				}

}

} elseif (($id3v2_majorversion >= 4) && ($parsedFrame['frame_name'] == 'RVA2')) { // 4.11  RVA2 Relative volume adjustment (2) (ID3v2.4+ only)
			//   There may be more than one 'RVA2' frame in each tag,
			//   but only one with the same identification string
			// <Header for 'Relative volume adjustment (2)', ID: 'RVA2'>
			// Identification          <text string> $00
			//   The 'identification' string is used to identify the situation and/or
			//   device where this adjustment should apply. The following is then
			//   repeated for every channel:
			// Type of channel         $xx
			// Volume adjustment       $xx xx
			// Bits representing peak  $xx
			// Peak volume             $xx (xx ...)

$frame_terminatorpos = strpos($parsedFrame['data'], "\x00");
			$frame_idstring = substr($parsedFrame['data'], 0, $frame_terminatorpos);
			if (ord($frame_idstring) === 0) {
				$frame_idstring = '';
			}
			$frame_remainingdata = substr($parsedFrame['data'], $frame_terminatorpos + strlen("\x00"));
			$parsedFrame['description'] = $frame_idstring;
			$RVA2channelcounter = 0;
			while (strlen($frame_remainingdata) >= 5) {
				$frame_offset = 0;
				$frame_channeltypeid = ord(substr($frame_remainingdata, $frame_offset++, 1));
				$parsedFrame[$RVA2channelcounter]['channeltypeid']  = $frame_channeltypeid;
				$parsedFrame[$RVA2channelcounter]['channeltype']    = $this->RVA2ChannelTypeLookup($frame_channeltypeid);
				$parsedFrame[$RVA2channelcounter]['volumeadjust']   = getid3_lib::BigEndian2Int(substr($frame_remainingdata, $frame_offset, 2), false, true); // 16-bit signed
				$frame_offset += 2;
				$parsedFrame[$RVA2channelcounter]['bitspeakvolume'] = ord(substr($frame_remainingdata, $frame_offset++, 1));
				if (($parsedFrame[$RVA2channelcounter]['bitspeakvolume'] < 1) || ($parsedFrame[$RVA2channelcounter]['bitspeakvolume'] > 4)) {
					$this->warning('ID3v2::RVA2 frame['.$RVA2channelcounter.'] contains invalid '.$parsedFrame[$RVA2channelcounter]['bitspeakvolume'].'-byte bits-representing-peak value');
					break;
				}
				$frame_bytespeakvolume = ceil($parsedFrame[$RVA2channelcounter]['bitspeakvolume'] / 8);
				$parsedFrame[$RVA2channelcounter]['peakvolume']     = getid3_lib::BigEndian2Int(substr($frame_remainingdata, $frame_offset, $frame_bytespeakvolume));
				$frame_remainingdata = substr($frame_remainingdata, $frame_offset + $frame_bytespeakvolume);
				$RVA2channelcounter++;
			}
			unset($parsedFrame['data']);

} elseif ((($id3v2_majorversion == 3) && ($parsedFrame['frame_name'] == 'RVAD')) || // 4.12  RVAD Relative volume adjustment (ID3v2.3 only)
				  (($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'RVA'))) {  // 4.12  RVA  Relative volume adjustment (ID3v2.2 only)
			//   There may only be one 'RVA' frame in each tag
			// <Header for 'Relative volume adjustment', ID: 'RVA'>
			// ID3v2.2 => Increment/decrement     %000000ba
			// ID3v2.3 => Increment/decrement     %00fedcba
			// Bits used for volume descr.        $xx
			// Relative volume change, right      $xx xx (xx ...) // a
			// Relative volume change, left       $xx xx (xx ...) // b
			// Peak volume right                  $xx xx (xx ...)
			// Peak volume left                   $xx xx (xx ...)
			//   ID3v2.3 only, optional (not present in ID3v2.2):
			// Relative volume change, right back $xx xx (xx ...) // c
			// Relative volume change, left back  $xx xx (xx ...) // d
			// Peak volume right back             $xx xx (xx ...)
			// Peak volume left back              $xx xx (xx ...)
			//   ID3v2.3 only, optional (not present in ID3v2.2):
			// Relative volume change, center     $xx xx (xx ...) // e
			// Peak volume center                 $xx xx (xx ...)
			//   ID3v2.3 only, optional (not present in ID3v2.2):
			// Relative volume change, bass       $xx xx (xx ...) // f
			// Peak volume bass                   $xx xx (xx ...)

$frame_offset = 0;
			$frame_incrdecrflags = getid3_lib::BigEndian2Bin(substr($parsedFrame['data'], $frame_offset++, 1));
			$parsedFrame['incdec']['right'] = (bool) substr($frame_incrdecrflags, 6, 1);
			$parsedFrame['incdec']['left']  = (bool) substr($frame_incrdecrflags, 7, 1);
			$parsedFrame['bitsvolume'] = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$frame_bytesvolume = ceil($parsedFrame['bitsvolume'] / 8);
			$parsedFrame['volumechange']['right'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, $frame_bytesvolume));
			if ($parsedFrame['incdec']['right'] === false) {
				$parsedFrame['volumechange']['right'] *= -1;
			}
			$frame_offset += $frame_bytesvolume;
			$parsedFrame['volumechange']['left'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, $frame_bytesvolume));
			if ($parsedFrame['incdec']['left'] === false) {
				$parsedFrame['volumechange']['left'] *= -1;
			}
			$frame_offset += $frame_bytesvolume;
			$parsedFrame['peakvolume']['right'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, $frame_bytesvolume));
			$frame_offset += $frame_bytesvolume;
			$parsedFrame['peakvolume']['left']  = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, $frame_bytesvolume));
			$frame_offset += $frame_bytesvolume;
			if ($id3v2_majorversion == 3) {
				$parsedFrame['data'] = substr($parsedFrame['data'], $frame_offset);
				if (strlen($parsedFrame['data']) > 0) {
					$parsedFrame['incdec']['rightrear'] = (bool) substr($frame_incrdecrflags, 4, 1);
					$parsedFrame['incdec']['leftrear']  = (bool) substr($frame_incrdecrflags, 5, 1);
					$parsedFrame['volumechange']['rightrear'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, $frame_bytesvolume));
					if ($parsedFrame['incdec']['rightrear'] === false) {
						$parsedFrame['volumechange']['rightrear'] *= -1;
					}
					$frame_offset += $frame_bytesvolume;
					$parsedFrame['volumechange']['leftrear'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, $frame_bytesvolume));
					if ($parsedFrame['incdec']['leftrear'] === false) {
						$parsedFrame['volumechange']['leftrear'] *= -1;
					}
					$frame_offset += $frame_bytesvolume;
					$parsedFrame['peakvolume']['rightrear'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, $frame_bytesvolume));
					$frame_offset += $frame_bytesvolume;
					$parsedFrame['peakvolume']['leftrear']  = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, $frame_bytesvolume));
					$frame_offset += $frame_bytesvolume;
				}
				$parsedFrame['data'] = substr($parsedFrame['data'], $frame_offset);
				if (strlen($parsedFrame['data']) > 0) {
					$parsedFrame['incdec']['center'] = (bool) substr($frame_incrdecrflags, 3, 1);
					$parsedFrame['volumechange']['center'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, $frame_bytesvolume));
					if ($parsedFrame['incdec']['center'] === false) {
						$parsedFrame['volumechange']['center'] *= -1;
					}
					$frame_offset += $frame_bytesvolume;
					$parsedFrame['peakvolume']['center'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, $frame_bytesvolume));
					$frame_offset += $frame_bytesvolume;
				}
				$parsedFrame['data'] = substr($parsedFrame['data'], $frame_offset);
				if (strlen($parsedFrame['data']) > 0) {
					$parsedFrame['incdec']['bass'] = (bool) substr($frame_incrdecrflags, 2, 1);
					$parsedFrame['volumechange']['bass'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, $frame_bytesvolume));
					if ($parsedFrame['incdec']['bass'] === false) {
						$parsedFrame['volumechange']['bass'] *= -1;
					}
					$frame_offset += $frame_bytesvolume;
					$parsedFrame['peakvolume']['bass'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, $frame_bytesvolume));
					$frame_offset += $frame_bytesvolume;
				}
			}
			unset($parsedFrame['data']);

} elseif (($id3v2_majorversion >= 4) && ($parsedFrame['frame_name'] == 'EQU2')) { // 4.12  EQU2 Equalisation (2) (ID3v2.4+ only)
			//   There may be more than one 'EQU2' frame in each tag,
			//   but only one with the same identification string
			// <Header of 'Equalisation (2)', ID: 'EQU2'>
			// Interpolation method  $xx
			//   $00  Band
			//   $01  Linear
			// Identification        <text string> $00
			//   The following is then repeated for every adjustment point
			// Frequency          $xx xx
			// Volume adjustment  $xx xx

$frame_offset = 0;
			$frame_interpolationmethod = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$frame_terminatorpos = strpos($parsedFrame['data'], "\x00", $frame_offset);
			$frame_idstring = substr($parsedFrame['data'], $frame_offset, $frame_terminatorpos - $frame_offset);
			if (ord($frame_idstring) === 0) {
				$frame_idstring = '';
			}
			$parsedFrame['description'] = $frame_idstring;
			$frame_remainingdata = substr($parsedFrame['data'], $frame_terminatorpos + strlen("\x00"));
			while (strlen($frame_remainingdata)) {
				$frame_frequency = getid3_lib::BigEndian2Int(substr($frame_remainingdata, 0, 2)) / 2;
				$parsedFrame['data'][$frame_frequency] = getid3_lib::BigEndian2Int(substr($frame_remainingdata, 2, 2), false, true);
				$frame_remainingdata = substr($frame_remainingdata, 4);
			}
			$parsedFrame['interpolationmethod'] = $frame_interpolationmethod;
			unset($parsedFrame['data']);

} elseif ((($id3v2_majorversion == 3) && ($parsedFrame['frame_name'] == 'EQUA')) || // 4.12  EQUA Equalisation (ID3v2.3 only)
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'EQU'))) {     // 4.13  EQU  Equalisation (ID3v2.2 only)
			//   There may only be one 'EQUA' frame in each tag
			// <Header for 'Relative volume adjustment', ID: 'EQU'>
			// Adjustment bits    $xx
			//   This is followed by 2 bytes + ('adjustment bits' rounded up to the
			//   nearest byte) for every equalisation band in the following format,
			//   giving a frequency range of 0 - 32767Hz:
			// Increment/decrement   %x (MSB of the Frequency)
			// Frequency             (lower 15 bits)
			// Adjustment            $xx (xx ...)

$frame_offset = 0;
			$parsedFrame['adjustmentbits'] = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$frame_adjustmentbytes = ceil($parsedFrame['adjustmentbits'] / 8);

$frame_remainingdata = (string) substr($parsedFrame['data'], $frame_offset);
			while (strlen($frame_remainingdata) > 0) {
				$frame_frequencystr = getid3_lib::BigEndian2Bin(substr($frame_remainingdata, 0, 2));
				$frame_incdec    = (bool) substr($frame_frequencystr, 0, 1);
				$frame_frequency = bindec(substr($frame_frequencystr, 1, 15));
				$parsedFrame[$frame_frequency]['incdec'] = $frame_incdec;
				$parsedFrame[$frame_frequency]['adjustment'] = getid3_lib::BigEndian2Int(substr($frame_remainingdata, 2, $frame_adjustmentbytes));
				if ($parsedFrame[$frame_frequency]['incdec'] === false) {
					$parsedFrame[$frame_frequency]['adjustment'] *= -1;
				}
				$frame_remainingdata = substr($frame_remainingdata, 2 + $frame_adjustmentbytes);
			}
			unset($parsedFrame['data']);

} elseif ((($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'RVRB')) || // 4.13  RVRB Reverb
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'REV'))) {     // 4.14  REV  Reverb
			//   There may only be one 'RVRB' frame in each tag.
			// <Header for 'Reverb', ID: 'RVRB'>
			// Reverb left (ms)                 $xx xx
			// Reverb right (ms)                $xx xx
			// Reverb bounces, left             $xx
			// Reverb bounces, right            $xx
			// Reverb feedback, left to left    $xx
			// Reverb feedback, left to right   $xx
			// Reverb feedback, right to right  $xx
			// Reverb feedback, right to left   $xx
			// Premix left to right             $xx
			// Premix right to left             $xx

$frame_offset = 0;
			$parsedFrame['left']  = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, 2));
			$frame_offset += 2;
			$parsedFrame['right'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, 2));
			$frame_offset += 2;
			$parsedFrame['bouncesL']      = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$parsedFrame['bouncesR']      = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$parsedFrame['feedbackLL']    = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$parsedFrame['feedbackLR']    = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$parsedFrame['feedbackRR']    = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$parsedFrame['feedbackRL']    = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$parsedFrame['premixLR']      = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$parsedFrame['premixRL']      = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			unset($parsedFrame['data']);

} elseif ((($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'APIC')) || // 4.14  APIC Attached picture
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'PIC'))) {     // 4.15  PIC  Attached picture
			//   There may be several pictures attached to one file,
			//   each in their individual 'APIC' frame, but only one
			//   with the same content descriptor
			// <Header for 'Attached picture', ID: 'APIC'>
			// Text encoding      $xx
			// ID3v2.3+ => MIME type          <text string> $00
			// ID3v2.2  => Image format       $xx xx xx
			// Picture type       $xx
			// Description        <text string according to encoding> $00 (00)
			// Picture data       <binary data>

$frame_imagetype = null;
			$frame_mimetype = null;
			if ($id3v2_majorversion == 2 && strlen($parsedFrame['data']) > $frame_offset) {
				$frame_imagetype = substr($parsedFrame['data'], $frame_offset, 3);
				if (strtolower($frame_imagetype) == 'ima') {
					// complete hack for mp3Rage (www.chaoticsoftware.com) that puts ID3v2.3-formatted
					// MIME type instead of 3-char ID3v2.2-format image type  (thanks xbhoffØpacbell*net)
					$frame_terminatorpos = strpos($parsedFrame['data'], "\x00", $frame_offset);
					$frame_mimetype = substr($parsedFrame['data'], $frame_offset, $frame_terminatorpos - $frame_offset);
					if (ord($frame_mimetype) === 0) {
						$frame_mimetype = '';
					}
					$frame_imagetype = strtoupper(str_replace('image/', '', strtolower($frame_mimetype)));
					if ($frame_imagetype == 'JPEG') {
						$frame_imagetype = 'JPG';
					}
					$frame_offset = $frame_terminatorpos + strlen("\x00");
				} else {
					$frame_offset += 3;
				}
			}
			if ($id3v2_majorversion > 2 && strlen($parsedFrame['data']) > $frame_offset) {
				$frame_terminatorpos = strpos($parsedFrame['data'], "\x00", $frame_offset);
				$frame_mimetype = substr($parsedFrame['data'], $frame_offset, $frame_terminatorpos - $frame_offset);
				if (ord($frame_mimetype) === 0) {
					$frame_mimetype = '';
				}
				$frame_offset = $frame_terminatorpos + strlen("\x00");
			}

$frame_picturetype = ord(substr($parsedFrame['data'], $frame_offset++, 1));

if ($frame_offset >= $parsedFrame['datalength']) {
				$this->warning('data portion of APIC frame is missing at offset '.($parsedFrame['dataoffset'] + 8 + $frame_offset));
			} else {
				$frame_terminatorpos = strpos($parsedFrame['data'], $frame_textencoding_terminator, $frame_offset);
				if (ord(substr($parsedFrame['data'], $frame_terminatorpos + strlen($frame_textencoding_terminator), 1)) === 0) {
					$frame_terminatorpos++; // strpos() fooled because 2nd byte of Unicode chars are often 0x00
				}
				$parsedFrame['description']   = substr($parsedFrame['data'], $frame_offset, $frame_terminatorpos - $frame_offset);
				$parsedFrame['description']   = $this->MakeUTF16emptyStringEmpty($parsedFrame['description']);
				$parsedFrame['encodingid']    = $frame_textencoding;
				$parsedFrame['encoding']      = $this->TextEncodingNameLookup($frame_textencoding);

if ($id3v2_majorversion == 2) {
					$parsedFrame['imagetype'] = isset($frame_imagetype) ? $frame_imagetype : null;
				} else {
					$parsedFrame['mime']      = isset($frame_mimetype) ? $frame_mimetype : null;
				}
				$parsedFrame['picturetypeid'] = $frame_picturetype;
				$parsedFrame['picturetype']   = $this->APICPictureTypeLookup($frame_picturetype);
				$parsedFrame['data']          = substr($parsedFrame['data'], $frame_terminatorpos + strlen($frame_textencoding_terminator));
				$parsedFrame['datalength']    = strlen($parsedFrame['data']);

$parsedFrame['image_mime']    = '';
				$imageinfo = array();
				if ($imagechunkcheck = getid3_lib::GetDataImageSize($parsedFrame['data'], $imageinfo)) {
					if (($imagechunkcheck[2] >= 1) && ($imagechunkcheck[2] <= 3)) {
						$parsedFrame['image_mime']       = image_type_to_mime_type($imagechunkcheck[2]);
						if ($imagechunkcheck[0]) {
							$parsedFrame['image_width']  = $imagechunkcheck[0];
						}
						if ($imagechunkcheck[1]) {
							$parsedFrame['image_height'] = $imagechunkcheck[1];
						}
					}
				}

do {
					if ($this->getid3->option_save_attachments === false) {
						// skip entirely
						unset($parsedFrame['data']);
						break;
					}
					$dir = '';
					if ($this->getid3->option_save_attachments === true) {
						// great
/*
					} elseif (is_int($this->getid3->option_save_attachments)) {
						if ($this->getid3->option_save_attachments < $parsedFrame['data_length']) {
							// too big, skip
							$this->warning('attachment at '.$frame_offset.' is too large to process inline ('.number_format($parsedFrame['data_length']).' bytes)');
							unset($parsedFrame['data']);
							break;
						}
*/
					} elseif (is_string($this->getid3->option_save_attachments)) {
						$dir = rtrim(str_replace(array('/', '\\'), DIRECTORY_SEPARATOR, $this->getid3->option_save_attachments), DIRECTORY_SEPARATOR);
						if (!is_dir($dir) || !getID3::is_writable($dir)) {
							// cannot write, skip
							$this->warning('attachment at '.$frame_offset.' cannot be saved to "'.$dir.'" (not writable)');
							unset($parsedFrame['data']);
							break;
						}
					}
					// if we get this far, must be OK
					if (is_string($this->getid3->option_save_attachments)) {
						$destination_filename = $dir.DIRECTORY_SEPARATOR.md5($info['filenamepath']).'_'.$frame_offset;
						if (!file_exists($destination_filename) || getID3::is_writable($destination_filename)) {
							file_put_contents($destination_filename, $parsedFrame['data']);
						} else {
							$this->warning('attachment at '.$frame_offset.' cannot be saved to "'.$destination_filename.'" (not writable)');
						}
						$parsedFrame['data_filename'] = $destination_filename;
						unset($parsedFrame['data']);
					} else {
						if (!empty($parsedFrame['framenameshort']) && !empty($parsedFrame['data'])) {
							if (!isset($info['id3v2']['comments']['picture'])) {
								$info['id3v2']['comments']['picture'] = array();
							}
							$comments_picture_data = array();
							foreach (array('data', 'image_mime', 'image_width', 'image_height', 'imagetype', 'picturetype', 'description', 'datalength') as $picture_key) {
								if (isset($parsedFrame[$picture_key])) {
									$comments_picture_data[$picture_key] = $parsedFrame[$picture_key];
								}
							}
							$info['id3v2']['comments']['picture'][] = $comments_picture_data;
							unset($comments_picture_data);
						}
					}
				} while (false); // @phpstan-ignore-line
			}

} elseif ((($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'GEOB')) || // 4.15  GEOB General encapsulated object
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'GEO'))) {     // 4.16  GEO  General encapsulated object
			//   There may be more than one 'GEOB' frame in each tag,
			//   but only one with the same content descriptor
			// <Header for 'General encapsulated object', ID: 'GEOB'>
			// Text encoding          $xx
			// MIME type              <text string> $00
			// Filename               <text string according to encoding> $00 (00)
			// Content description    <text string according to encoding> $00 (00)
			// Encapsulated object    <binary data>

$frame_terminatorpos = strpos($parsedFrame['data'], $frame_textencoding_terminator, $frame_offset);
			if (ord(substr($parsedFrame['data'], $frame_terminatorpos + strlen($frame_textencoding_terminator), 1)) === 0) {
				$frame_terminatorpos++; // strpos() fooled because 2nd byte of Unicode chars are often 0x00
			}
			$frame_filename = substr($parsedFrame['data'], $frame_offset, $frame_terminatorpos - $frame_offset);
			if (ord($frame_filename) === 0) {
				$frame_filename = '';
			}
			$frame_offset = $frame_terminatorpos + strlen($frame_textencoding_terminator);

$frame_terminatorpos = strpos($parsedFrame['data'], $frame_textencoding_terminator, $frame_offset);
			if (ord(substr($parsedFrame['data'], $frame_terminatorpos + strlen($frame_textencoding_terminator), 1)) === 0) {
				$frame_terminatorpos++; // strpos() fooled because 2nd byte of Unicode chars are often 0x00
			}
			$parsedFrame['description'] = substr($parsedFrame['data'], $frame_offset, $frame_terminatorpos - $frame_offset);
			$parsedFrame['description'] = $this->MakeUTF16emptyStringEmpty($parsedFrame['description']);
			$frame_offset = $frame_terminatorpos + strlen($frame_textencoding_terminator);

$parsedFrame['objectdata']  = (string) substr($parsedFrame['data'], $frame_offset);
			$parsedFrame['encodingid']  = $frame_textencoding;
			$parsedFrame['encoding']    = $this->TextEncodingNameLookup($frame_textencoding);

$parsedFrame['mime']        = $frame_mimetype;
			$parsedFrame['filename']    = $frame_filename;
			unset($parsedFrame['data']);

} elseif ((($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'PCNT')) || // 4.16  PCNT Play counter
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'CNT'))) {     // 4.17  CNT  Play counter
			//   There may only be one 'PCNT' frame in each tag.
			//   When the counter reaches all one's, one byte is inserted in
			//   front of the counter thus making the counter eight bits bigger
			// <Header for 'Play counter', ID: 'PCNT'>
			// Counter        $xx xx xx xx (xx ...)

$parsedFrame['data']          = getid3_lib::BigEndian2Int($parsedFrame['data']);

} elseif ((($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'POPM')) || // 4.17  POPM Popularimeter
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'POP'))) {    // 4.18  POP  Popularimeter
			//   There may be more than one 'POPM' frame in each tag,
			//   but only one with the same email address
			// <Header for 'Popularimeter', ID: 'POPM'>
			// Email to user   <text string> $00
			// Rating          $xx
			// Counter         $xx xx xx xx (xx ...)

$frame_offset = 0;
			$frame_terminatorpos = strpos($parsedFrame['data'], "\x00", $frame_offset);
			$frame_emailaddress = substr($parsedFrame['data'], $frame_offset, $frame_terminatorpos - $frame_offset);
			if (ord($frame_emailaddress) === 0) {
				$frame_emailaddress = '';
			}
			$frame_offset = $frame_terminatorpos + strlen("\x00");
			$frame_rating = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$parsedFrame['counter'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset));
			$parsedFrame['email']   = $frame_emailaddress;
			$parsedFrame['rating']  = $frame_rating;
			unset($parsedFrame['data']);

} elseif ((($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'RBUF')) || // 4.18  RBUF Recommended buffer size
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'BUF'))) {     // 4.19  BUF  Recommended buffer size
			//   There may only be one 'RBUF' frame in each tag
			// <Header for 'Recommended buffer size', ID: 'RBUF'>
			// Buffer size               $xx xx xx
			// Embedded info flag        %0000000x
			// Offset to next tag        $xx xx xx xx

$frame_offset = 0;
			$parsedFrame['buffersize'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, 3));
			$frame_offset += 3;

$frame_embeddedinfoflags = getid3_lib::BigEndian2Bin(substr($parsedFrame['data'], $frame_offset++, 1));
			$parsedFrame['flags']['embededinfo'] = (bool) substr($frame_embeddedinfoflags, 7, 1);
			$parsedFrame['nexttagoffset'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, 4));
			unset($parsedFrame['data']);

} elseif (($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'CRM')) { // 4.20  Encrypted meta frame (ID3v2.2 only)
			//   There may be more than one 'CRM' frame in a tag,
			//   but only one with the same 'owner identifier'
			// <Header for 'Encrypted meta frame', ID: 'CRM'>
			// Owner identifier      <textstring> $00 (00)
			// Content/explanation   <textstring> $00 (00)
			// Encrypted datablock   <binary data>

$frame_terminatorpos = strpos($parsedFrame['data'], "\x00", $frame_offset);
			$parsedFrame['description'] = substr($parsedFrame['data'], $frame_offset, $frame_terminatorpos - $frame_offset);
			$parsedFrame['description'] = $this->MakeUTF16emptyStringEmpty($parsedFrame['description']);
			$frame_offset = $frame_terminatorpos + strlen("\x00");

$parsedFrame['ownerid']     = $frame_ownerid;
			$parsedFrame['data']        = (string) substr($parsedFrame['data'], $frame_offset);
			unset($parsedFrame['data']);

} elseif ((($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'AENC')) || // 4.19  AENC Audio encryption
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'CRA'))) {     // 4.21  CRA  Audio encryption
			//   There may be more than one 'AENC' frames in a tag,
			//   but only one with the same 'Owner identifier'
			// <Header for 'Audio encryption', ID: 'AENC'>
			// Owner identifier   <text string> $00
			// Preview start      $xx xx
			// Preview length     $xx xx
			// Encryption info    <binary data>

$frame_offset = 0;
			$frame_terminatorpos = strpos($parsedFrame['data'], "\x00", $frame_offset);
			$frame_ownerid = substr($parsedFrame['data'], $frame_offset, $frame_terminatorpos - $frame_offset);
			if (ord($frame_ownerid) === 0) {
				$frame_ownerid = '';
			}
			$frame_offset = $frame_terminatorpos + strlen("\x00");
			$parsedFrame['ownerid'] = $frame_ownerid;
			$parsedFrame['previewstart'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, 2));
			$frame_offset += 2;
			$parsedFrame['previewlength'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, 2));
			$frame_offset += 2;
			$parsedFrame['encryptioninfo'] = (string) substr($parsedFrame['data'], $frame_offset);
			unset($parsedFrame['data']);

} elseif ((($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'LINK')) || // 4.20  LINK Linked information
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'LNK'))) {    // 4.22  LNK  Linked information
			//   There may be more than one 'LINK' frame in a tag,
			//   but only one with the same contents
			// <Header for 'Linked information', ID: 'LINK'>
			// ID3v2.3+ => Frame identifier   $xx xx xx xx
			// ID3v2.2  => Frame identifier   $xx xx xx
			// URL                            <text string> $00
			// ID and additional data         <text string(s)>

$frame_offset = 0;
			if ($id3v2_majorversion == 2) {
				$parsedFrame['frameid'] = substr($parsedFrame['data'], $frame_offset, 3);
				$frame_offset += 3;
			} else {
				$parsedFrame['frameid'] = substr($parsedFrame['data'], $frame_offset, 4);
				$frame_offset += 4;
			}

$frame_terminatorpos = strpos($parsedFrame['data'], "\x00", $frame_offset);
			$frame_url = substr($parsedFrame['data'], $frame_offset, $frame_terminatorpos - $frame_offset);
			if (ord($frame_url) === 0) {
				$frame_url = '';
			}
			$frame_offset = $frame_terminatorpos + strlen("\x00");
			$parsedFrame['url'] = $frame_url;

$parsedFrame['additionaldata'] = (string) substr($parsedFrame['data'], $frame_offset);
			if (!empty($parsedFrame['framenameshort']) && $parsedFrame['url']) {
				$info['id3v2']['comments'][$parsedFrame['framenameshort']][] = getid3_lib::iconv_fallback_iso88591_utf8($parsedFrame['url']);
			}
			unset($parsedFrame['data']);

} elseif (($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'POSS')) { // 4.21  POSS Position synchronisation frame (ID3v2.3+ only)
			//   There may only be one 'POSS' frame in each tag
			// <Head for 'Position synchronisation', ID: 'POSS'>
			// Time stamp format         $xx
			// Position                  $xx (xx ...)

$frame_offset = 0;
			$parsedFrame['timestampformat'] = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$parsedFrame['position']        = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset));
			unset($parsedFrame['data']);

} elseif (($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'USER')) { // 4.22  USER Terms of use (ID3v2.3+ only)
			//   There may be more than one 'Terms of use' frame in a tag,
			//   but only one with the same 'Language'
			// <Header for 'Terms of use frame', ID: 'USER'>
			// Text encoding        $xx
			// Language             $xx xx xx
			// The actual text      <text string according to encoding>

$frame_offset = 0;
			$frame_textencoding = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			if ((($id3v2_majorversion <= 3) && ($frame_textencoding > 1)) || (($id3v2_majorversion == 4) && ($frame_textencoding > 3))) {
				$this->warning('Invalid text encoding byte ('.$frame_textencoding.') in frame "'.$parsedFrame['frame_name'].'" - defaulting to ISO-8859-1 encoding');
			}
			$frame_language = substr($parsedFrame['data'], $frame_offset, 3);
			$frame_offset += 3;
			$parsedFrame['language']     = $frame_language;
			$parsedFrame['languagename'] = $this->LanguageLookup($frame_language, false);
			$parsedFrame['encodingid']   = $frame_textencoding;
			$parsedFrame['encoding']     = $this->TextEncodingNameLookup($frame_textencoding);

$parsedFrame['data'] = (string) substr($parsedFrame['data'], $frame_offset);
			$parsedFrame['data'] = $this->RemoveStringTerminator($parsedFrame['data'], $this->TextEncodingTerminatorLookup($frame_textencoding));
			if (!empty($parsedFrame['framenameshort']) && !empty($parsedFrame['data'])) {
				$info['id3v2']['comments'][$parsedFrame['framenameshort']][] = getid3_lib::iconv_fallback($parsedFrame['encoding'], $info['id3v2']['encoding'], $parsedFrame['data']);
			}
			unset($parsedFrame['data']);

} elseif (($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'OWNE')) { // 4.23  OWNE Ownership frame (ID3v2.3+ only)
			//   There may only be one 'OWNE' frame in a tag
			// <Header for 'Ownership frame', ID: 'OWNE'>
			// Text encoding     $xx
			// Price paid        <text string> $00
			// Date of purch.    <text string>
			// Seller            <text string according to encoding>

$frame_terminatorpos = strpos($parsedFrame['data'], "\x00", $frame_offset);
			$frame_pricepaid = substr($parsedFrame['data'], $frame_offset, $frame_terminatorpos - $frame_offset);
			$frame_offset = $frame_terminatorpos + strlen("\x00");

$parsedFrame['pricepaid']['currencyid'] = substr($frame_pricepaid, 0, 3);
			$parsedFrame['pricepaid']['currency']   = $this->LookupCurrencyUnits($parsedFrame['pricepaid']['currencyid']);
			$parsedFrame['pricepaid']['value']      = substr($frame_pricepaid, 3);

$parsedFrame['purchasedate'] = substr($parsedFrame['data'], $frame_offset, 8);
			if ($this->IsValidDateStampString($parsedFrame['purchasedate'])) {
				$parsedFrame['purchasedateunix'] = mktime (0, 0, 0, substr($parsedFrame['purchasedate'], 4, 2), substr($parsedFrame['purchasedate'], 6, 2), substr($parsedFrame['purchasedate'], 0, 4));
			}
			$frame_offset += 8;

$parsedFrame['seller'] = (string) substr($parsedFrame['data'], $frame_offset);
			$parsedFrame['seller'] = $this->RemoveStringTerminator($parsedFrame['seller'], $this->TextEncodingTerminatorLookup($frame_textencoding));
			unset($parsedFrame['data']);

} elseif (($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'COMR')) { // 4.24  COMR Commercial frame (ID3v2.3+ only)
			//   There may be more than one 'commercial frame' in a tag,
			//   but no two may be identical
			// <Header for 'Commercial frame', ID: 'COMR'>
			// Text encoding      $xx
			// Price string       <text string> $00
			// Valid until        <text string>
			// Contact URL        <text string> $00
			// Received as        $xx
			// Name of seller     <text string according to encoding> $00 (00)
			// Description        <text string according to encoding> $00 (00)
			// Picture MIME type  <string> $00
			// Seller logo        <binary data>

$frame_terminatorpos = strpos($parsedFrame['data'], "\x00", $frame_offset);
			$frame_pricestring = substr($parsedFrame['data'], $frame_offset, $frame_terminatorpos - $frame_offset);
			$frame_offset = $frame_terminatorpos + strlen("\x00");
			$frame_rawpricearray = explode('/', $frame_pricestring);
			foreach ($frame_rawpricearray as $key => $val) {
				$frame_currencyid = substr($val, 0, 3);
				$parsedFrame['price'][$frame_currencyid]['currency'] = $this->LookupCurrencyUnits($frame_currencyid);
				$parsedFrame['price'][$frame_currencyid]['value']    = substr($val, 3);
			}

$frame_datestring = substr($parsedFrame['data'], $frame_offset, 8);
			$frame_offset += 8;

$frame_terminatorpos = strpos($parsedFrame['data'], "\x00", $frame_offset);
			$frame_contacturl = substr($parsedFrame['data'], $frame_offset, $frame_terminatorpos - $frame_offset);
			$frame_offset = $frame_terminatorpos + strlen("\x00");

$frame_receivedasid = ord(substr($parsedFrame['data'], $frame_offset++, 1));

$frame_terminatorpos = strpos($parsedFrame['data'], $frame_textencoding_terminator, $frame_offset);
			if (ord(substr($parsedFrame['data'], $frame_terminatorpos + strlen($frame_textencoding_terminator), 1)) === 0) {
				$frame_terminatorpos++; // strpos() fooled because 2nd byte of Unicode chars are often 0x00
			}
			$frame_sellername = substr($parsedFrame['data'], $frame_offset, $frame_terminatorpos - $frame_offset);
			if (ord($frame_sellername) === 0) {
				$frame_sellername = '';
			}
			$frame_offset = $frame_terminatorpos + strlen($frame_textencoding_terminator);

$frame_terminatorpos = strpos($parsedFrame['data'], $frame_textencoding_terminator, $frame_offset);
			if (ord(substr($parsedFrame['data'], $frame_terminatorpos + strlen($frame_textencoding_terminator), 1)) === 0) {
				$frame_terminatorpos++; // strpos() fooled because 2nd byte of Unicode chars are often 0x00
			}
			$parsedFrame['description'] = substr($parsedFrame['data'], $frame_offset, $frame_terminatorpos - $frame_offset);
			$parsedFrame['description'] = $this->MakeUTF16emptyStringEmpty($parsedFrame['description']);
			$frame_offset = $frame_terminatorpos + strlen($frame_textencoding_terminator);

$frame_terminatorpos = strpos($parsedFrame['data'], "\x00", $frame_offset);
			$frame_mimetype = substr($parsedFrame['data'], $frame_offset, $frame_terminatorpos - $frame_offset);
			$frame_offset = $frame_terminatorpos + strlen("\x00");

$frame_sellerlogo = substr($parsedFrame['data'], $frame_offset);

$parsedFrame['encodingid']        = $frame_textencoding;
			$parsedFrame['encoding']          = $this->TextEncodingNameLookup($frame_textencoding);

$parsedFrame['pricevaliduntil']   = $frame_datestring;
			$parsedFrame['contacturl']        = $frame_contacturl;
			$parsedFrame['receivedasid']      = $frame_receivedasid;
			$parsedFrame['receivedas']        = $this->COMRReceivedAsLookup($frame_receivedasid);
			$parsedFrame['sellername']        = $frame_sellername;
			$parsedFrame['mime']              = $frame_mimetype;
			$parsedFrame['logo']              = $frame_sellerlogo;
			unset($parsedFrame['data']);

} elseif (($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'ENCR')) { // 4.25  ENCR Encryption method registration (ID3v2.3+ only)
			//   There may be several 'ENCR' frames in a tag,
			//   but only one containing the same symbol
			//   and only one containing the same owner identifier
			// <Header for 'Encryption method registration', ID: 'ENCR'>
			// Owner identifier    <text string> $00
			// Method symbol       $xx
			// Encryption data     <binary data>

$parsedFrame['ownerid']      = $frame_ownerid;
			$parsedFrame['methodsymbol'] = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$parsedFrame['data']         = (string) substr($parsedFrame['data'], $frame_offset);

} elseif (($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'GRID')) { // 4.26  GRID Group identification registration (ID3v2.3+ only)

//   There may be several 'GRID' frames in a tag,
			//   but only one containing the same symbol
			//   and only one containing the same owner identifier
			// <Header for 'Group ID registration', ID: 'GRID'>
			// Owner identifier      <text string> $00
			// Group symbol          $xx
			// Group dependent data  <binary data>

$parsedFrame['ownerid']       = $frame_ownerid;
			$parsedFrame['groupsymbol']   = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$parsedFrame['data']          = (string) substr($parsedFrame['data'], $frame_offset);

} elseif (($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'PRIV')) { // 4.27  PRIV Private frame (ID3v2.3+ only)
			//   The tag may contain more than one 'PRIV' frame
			//   but only with different contents
			// <Header for 'Private frame', ID: 'PRIV'>
			// Owner identifier      <text string> $00
			// The private data      <binary data>

$parsedFrame['ownerid'] = $frame_ownerid;
			$parsedFrame['data']    = (string) substr($parsedFrame['data'], $frame_offset);

} elseif (($id3v2_majorversion >= 4) && ($parsedFrame['frame_name'] == 'SIGN')) { // 4.28  SIGN Signature frame (ID3v2.4+ only)
			//   There may be more than one 'signature frame' in a tag,
			//   but no two may be identical
			// <Header for 'Signature frame', ID: 'SIGN'>
			// Group symbol      $xx
			// Signature         <binary data>

$frame_offset = 0;
			$parsedFrame['groupsymbol'] = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$parsedFrame['data']        = (string) substr($parsedFrame['data'], $frame_offset);

} elseif (($id3v2_majorversion >= 4) && ($parsedFrame['frame_name'] == 'SEEK')) { // 4.29  SEEK Seek frame (ID3v2.4+ only)
			//   There may only be one 'seek frame' in a tag
			// <Header for 'Seek frame', ID: 'SEEK'>
			// Minimum offset to next tag       $xx xx xx xx

$frame_offset = 0;
			$parsedFrame['data']          = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, 4));

} elseif (($id3v2_majorversion >= 4) && ($parsedFrame['frame_name'] == 'ASPI')) { // 4.30  ASPI Audio seek point index (ID3v2.4+ only)
			//   There may only be one 'audio seek point index' frame in a tag
			// <Header for 'Seek Point Index', ID: 'ASPI'>
			// Indexed data start (S)         $xx xx xx xx
			// Indexed data length (L)        $xx xx xx xx
			// Number of index points (N)     $xx xx
			// Bits per index point (b)       $xx
			//   Then for every index point the following data is included:
			// Fraction at index (Fi)          $xx (xx)

$frame_offset = 0;
			$parsedFrame['datastart'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, 4));
			$frame_offset += 4;
			$parsedFrame['indexeddatalength'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, 4));
			$frame_offset += 4;
			$parsedFrame['indexpoints'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, 2));
			$frame_offset += 2;
			$parsedFrame['bitsperpoint'] = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$frame_bytesperpoint = ceil($parsedFrame['bitsperpoint'] / 8);
			for ($i = 0; $i < $parsedFrame['indexpoints']; $i++) {
				$parsedFrame['indexes'][$i] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, $frame_bytesperpoint));
				$frame_offset += $frame_bytesperpoint;
			}
			unset($parsedFrame['data']);

} elseif (($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'RGAD')) { // Replay Gain Adjustment
			// http://privatewww.essex.ac.uk/~djmrob/replaygain/file_format_id3v2.html
			//   There may only be one 'RGAD' frame in a tag
			// <Header for 'Replay Gain Adjustment', ID: 'RGAD'>
			// Peak Amplitude                      $xx $xx $xx $xx
			// Radio Replay Gain Adjustment        %aaabbbcd %dddddddd
			// Audiophile Replay Gain Adjustment   %aaabbbcd %dddddddd
			//   a - name code
			//   b - originator code
			//   c - sign bit
			//   d - replay gain adjustment

$frame_offset = 0;
			$parsedFrame['peakamplitude'] = getid3_lib::BigEndian2Float(substr($parsedFrame['data'], $frame_offset, 4));
			$frame_offset += 4;
			foreach (array('track','album') as $rgad_entry_type) {
				$rg_adjustment_word = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, 2));
				$frame_offset += 2;
				$parsedFrame['raw'][$rgad_entry_type]['name']       = ($rg_adjustment_word & 0xE000) >> 13;
				$parsedFrame['raw'][$rgad_entry_type]['originator'] = ($rg_adjustment_word & 0x1C00) >> 10;
				$parsedFrame['raw'][$rgad_entry_type]['signbit']    = ($rg_adjustment_word & 0x0200) >>  9;
				$parsedFrame['raw'][$rgad_entry_type]['adjustment'] = ($rg_adjustment_word & 0x0100);
			}
			$parsedFrame['track']['name']       = getid3_lib::RGADnameLookup($parsedFrame['raw']['track']['name']);
			$parsedFrame['track']['originator'] = getid3_lib::RGADoriginatorLookup($parsedFrame['raw']['track']['originator']);
			$parsedFrame['track']['adjustment'] = getid3_lib::RGADadjustmentLookup($parsedFrame['raw']['track']['adjustment'], $parsedFrame['raw']['track']['signbit']);
			$parsedFrame['album']['name']       = getid3_lib::RGADnameLookup($parsedFrame['raw']['album']['name']);
			$parsedFrame['album']['originator'] = getid3_lib::RGADoriginatorLookup($parsedFrame['raw']['album']['originator']);
			$parsedFrame['album']['adjustment'] = getid3_lib::RGADadjustmentLookup($parsedFrame['raw']['album']['adjustment'], $parsedFrame['raw']['album']['signbit']);

$info['replay_gain']['track']['peak']       = $parsedFrame['peakamplitude'];
			$info['replay_gain']['track']['originator'] = $parsedFrame['track']['originator'];
			$info['replay_gain']['track']['adjustment'] = $parsedFrame['track']['adjustment'];
			$info['replay_gain']['album']['originator'] = $parsedFrame['album']['originator'];
			$info['replay_gain']['album']['adjustment'] = $parsedFrame['album']['adjustment'];

unset($parsedFrame['data']);

} elseif (($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'CHAP')) { // CHAP Chapters frame (ID3v2.3+ only)
			// http://id3.org/id3v2-chapters-1.0
			// <ID3v2.3 or ID3v2.4 frame header, ID: "CHAP">           (10 bytes)
			// Element ID      <text string> $00
			// Start time      $xx xx xx xx
			// End time        $xx xx xx xx
			// Start offset    $xx xx xx xx
			// End offset      $xx xx xx xx
			// <Optional embedded sub-frames>

$frame_offset = 0;
			@list($parsedFrame['element_id']) = explode("\x00", $parsedFrame['data'], 2);
			$frame_offset += strlen($parsedFrame['element_id']."\x00");
			$parsedFrame['time_begin'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, 4));
			$frame_offset += 4;
			$parsedFrame['time_end']   = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, 4));
			$frame_offset += 4;
			if (substr($parsedFrame['data'], $frame_offset, 4) != "\xFF\xFF\xFF\xFF") {
				// "If these bytes are all set to 0xFF then the value should be ignored and the start time value should be utilized."
				$parsedFrame['offset_begin'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, 4));
			}
			$frame_offset += 4;
			if (substr($parsedFrame['data'], $frame_offset, 4) != "\xFF\xFF\xFF\xFF") {
				// "If these bytes are all set to 0xFF then the value should be ignored and the start time value should be utilized."
				$parsedFrame['offset_end']   = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, 4));
			}
			$frame_offset += 4;

if ($frame_offset < strlen($parsedFrame['data'])) {
				$parsedFrame['subframes'] = array();
				while ($frame_offset < strlen($parsedFrame['data'])) {
					// <Optional embedded sub-frames>
					$subframe = array();
					$subframe['name']      =                           substr($parsedFrame['data'], $frame_offset, 4);
					$frame_offset += 4;
					$subframe['size']      = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, 4));
					$frame_offset += 4;
					$subframe['flags_raw'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, 2));
					$frame_offset += 2;
					if ($subframe['size'] > (strlen($parsedFrame['data']) - $frame_offset)) {
						$this->warning('CHAP subframe "'.$subframe['name'].'" at frame offset '.$frame_offset.' claims to be "'.$subframe['size'].'" bytes, which is more than the available data ('.(strlen($parsedFrame['data']) - $frame_offset).' bytes)');
						break;
					}
					$subframe_rawdata = substr($parsedFrame['data'], $frame_offset, $subframe['size']);
					$frame_offset += $subframe['size'];

$subframe['encodingid'] = ord(substr($subframe_rawdata, 0, 1));
					$subframe['text']       =     substr($subframe_rawdata, 1);
					$subframe['encoding']   = $this->TextEncodingNameLookup($subframe['encodingid']);
					$encoding_converted_text = trim(getid3_lib::iconv_fallback($subframe['encoding'], $info['encoding'], $subframe['text']));
					switch (substr($encoding_converted_text, 0, 2)) {
						case "\xFF\xFE":
						case "\xFE\xFF":
							switch (strtoupper($info['id3v2']['encoding'])) {
								case 'ISO-8859-1':
								case 'UTF-8':
									$encoding_converted_text = substr($encoding_converted_text, 2);
									// remove unwanted byte-order-marks
									break;
								default:
									// ignore
									break;
							}
							break;
						default:
							// do not remove BOM
							break;
					}

switch ($subframe['name']) {
						case 'TIT2':
							$parsedFrame['chapter_name']        = $encoding_converted_text;
							$parsedFrame['subframes'][] = $subframe;
							break;
						case 'TIT3':
							$parsedFrame['chapter_description'] = $encoding_converted_text;
							$parsedFrame['subframes'][] = $subframe;
							break;
						case 'WXXX':
							@list($subframe['chapter_url_description'], $subframe['chapter_url']) = explode("\x00", $encoding_converted_text, 2);
							$parsedFrame['chapter_url'][$subframe['chapter_url_description']] = $subframe['chapter_url'];
							$parsedFrame['subframes'][] = $subframe;
							break;
						case 'APIC':
							if (preg_match('#^([^\\x00]+)*\\x00(.)([^\\x00]+)*\\x00(.+)$#s', $subframe['text'], $matches)) {
								list($dummy, $subframe_apic_mime, $subframe_apic_picturetype, $subframe_apic_description, $subframe_apic_picturedata) = $matches;
								$subframe['image_mime']   = trim(getid3_lib::iconv_fallback($subframe['encoding'], $info['encoding'], $subframe_apic_mime));
								$subframe['picture_type'] = $this->APICPictureTypeLookup($subframe_apic_picturetype);
								$subframe['description']  = trim(getid3_lib::iconv_fallback($subframe['encoding'], $info['encoding'], $subframe_apic_description));
								if (strlen($this->TextEncodingTerminatorLookup($subframe['encoding'])) == 2) {
									// the null terminator between "description" and "picture data" could be either 1 byte (ISO-8859-1, UTF-8) or two bytes (UTF-16)
									// the above regex assumes one byte, if it's actually two then strip the second one here
									$subframe_apic_picturedata = substr($subframe_apic_picturedata, 1);
								}
								$subframe['data'] = $subframe_apic_picturedata;
								unset($dummy, $subframe_apic_mime, $subframe_apic_picturetype, $subframe_apic_description, $subframe_apic_picturedata);
								unset($subframe['text'], $parsedFrame['text']);
								$parsedFrame['subframes'][] = $subframe;
								$parsedFrame['picture_present'] = true;
							} else {
								$this->warning('ID3v2.CHAP subframe #'.(count($parsedFrame['subframes']) + 1).' "'.$subframe['name'].'" not in expected format');
							}
							break;
						default:
							$this->warning('ID3v2.CHAP subframe "'.$subframe['name'].'" not handled (supported: TIT2, TIT3, WXXX, APIC)');
							break;
					}
				}
				unset($subframe_rawdata, $subframe, $encoding_converted_text);
				unset($parsedFrame['data']); // debatable whether this this be here, without it the returned structure may contain a large amount of duplicate data if chapters contain APIC
			}

$id3v2_chapter_entry = array();
			foreach (array('id', 'time_begin', 'time_end', 'offset_begin', 'offset_end', 'chapter_name', 'chapter_description', 'chapter_url', 'picture_present') as $id3v2_chapter_key) {
				if (isset($parsedFrame[$id3v2_chapter_key])) {
					$id3v2_chapter_entry[$id3v2_chapter_key] = $parsedFrame[$id3v2_chapter_key];
				}
			}
			if (!isset($info['id3v2']['chapters'])) {
				$info['id3v2']['chapters'] = array();
			}
			$info['id3v2']['chapters'][] = $id3v2_chapter_entry;
			unset($id3v2_chapter_entry, $id3v2_chapter_key);

} elseif (($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'CTOC')) { // CTOC Chapters Table Of Contents frame (ID3v2.3+ only)
			// http://id3.org/id3v2-chapters-1.0
			// <ID3v2.3 or ID3v2.4 frame header, ID: "CTOC">           (10 bytes)
			// Element ID      <text string> $00
			// CTOC flags        %xx
			// Entry count       $xx
			// Child Element ID  <string>$00   /* zero or more child CHAP or CTOC entries */
			// <Optional embedded sub-frames>

$frame_offset = 0;
			@list($parsedFrame['element_id']) = explode("\x00", $parsedFrame['data'], 2);
			$frame_offset += strlen($parsedFrame['element_id']."\x00");
			$ctoc_flags_raw = ord(substr($parsedFrame['data'], $frame_offset, 1));
			$frame_offset += 1;
			$parsedFrame['entry_count'] = ord(substr($parsedFrame['data'], $frame_offset, 1));
			$frame_offset += 1;

$terminator_position = null;
			for ($i = 0; $i < $parsedFrame['entry_count']; $i++) {
				$terminator_position = strpos($parsedFrame['data'], "\x00", $frame_offset);
				$parsedFrame['child_element_ids'][$i] = substr($parsedFrame['data'], $frame_offset, $terminator_position - $frame_offset);
				$frame_offset = $terminator_position + 1;
			}

$parsedFrame['ctoc_flags']['ordered']   = (bool) ($ctoc_flags_raw & 0x01);
			$parsedFrame['ctoc_flags']['top_level'] = (bool) ($ctoc_flags_raw & 0x03);

unset($ctoc_flags_raw, $terminator_position);

if ($frame_offset < strlen($parsedFrame['data'])) {
				$parsedFrame['subframes'] = array();
				while ($frame_offset < strlen($parsedFrame['data'])) {
					// <Optional embedded sub-frames>
					$subframe = array();
					$subframe['name']      =                           substr($parsedFrame['data'], $frame_offset, 4);
					$frame_offset += 4;
					$subframe['size']      = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, 4));
					$frame_offset += 4;
					$subframe['flags_raw'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, 2));
					$frame_offset += 2;
					if ($subframe['size'] > (strlen($parsedFrame['data']) - $frame_offset)) {
						$this->warning('CTOS subframe "'.$subframe['name'].'" at frame offset '.$frame_offset.' claims to be "'.$subframe['size'].'" bytes, which is more than the available data ('.(strlen($parsedFrame['data']) - $frame_offset).' bytes)');
						break;
					}
					$subframe_rawdata = substr($parsedFrame['data'], $frame_offset, $subframe['size']);
					$frame_offset += $subframe['size'];

$subframe['encodingid'] = ord(substr($subframe_rawdata, 0, 1));
					$subframe['text']       =     substr($subframe_rawdata, 1);
					$subframe['encoding']   = $this->TextEncodingNameLookup($subframe['encodingid']);
					$encoding_converted_text = trim(getid3_lib::iconv_fallback($subframe['encoding'], $info['encoding'], $subframe['text']));;
					switch (substr($encoding_converted_text, 0, 2)) {
						case "\xFF\xFE":
						case "\xFE\xFF":
							switch (strtoupper($info['id3v2']['encoding'])) {
								case 'ISO-8859-1':
								case 'UTF-8':
									$encoding_converted_text = substr($encoding_converted_text, 2);
									// remove unwanted byte-order-marks
									break;
								default:
									// ignore
									break;
							}
							break;
						default:
							// do not remove BOM
							break;
					}

if (($subframe['name'] == 'TIT2') || ($subframe['name'] == 'TIT3')) {
						if ($subframe['name'] == 'TIT2') {
							$parsedFrame['toc_name']        = $encoding_converted_text;
						} elseif ($subframe['name'] == 'TIT3') {
							$parsedFrame['toc_description'] = $encoding_converted_text;
						}
						$parsedFrame['subframes'][] = $subframe;
					} else {
						$this->warning('ID3v2.CTOC subframe "'.$subframe['name'].'" not handled (only TIT2 and TIT3)');
					}
				}
				unset($subframe_rawdata, $subframe, $encoding_converted_text);
			}

}

return true;
	}

/**
	 * @param string $data
	 *
	 * @return string
	 */
	public function DeUnsynchronise($data) {
		return str_replace("\xFF\x00", "\xFF", $data);
	}

/**
	 * @param int $index
	 *
	 * @return string
	 */
	public function LookupExtendedHeaderRestrictionsTagSizeLimits($index) {
		static $LookupExtendedHeaderRestrictionsTagSizeLimits = array(
			0x00 => 'No more than 128 frames and 1 MB total tag size',
			0x01 => 'No more than 64 frames and 128 KB total tag size',
			0x02 => 'No more than 32 frames and 40 KB total tag size',
			0x03 => 'No more than 32 frames and 4 KB total tag size',
		);
		return (isset($LookupExtendedHeaderRestrictionsTagSizeLimits[$index]) ? $LookupExtendedHeaderRestrictionsTagSizeLimits[$index] : '');
	}

/**
	 * @param int $index
	 *
	 * @return string
	 */
	public function LookupExtendedHeaderRestrictionsTextEncodings($index) {
		static $LookupExtendedHeaderRestrictionsTextEncodings = array(
			0x00 => 'No restrictions',
			0x01 => 'Strings are only encoded with ISO-8859-1 or UTF-8',
		);
		return (isset($LookupExtendedHeaderRestrictionsTextEncodings[$index]) ? $LookupExtendedHeaderRestrictionsTextEncodings[$index] : '');
	}

/**
	 * @param int $index
	 *
	 * @return string
	 */
	public function LookupExtendedHeaderRestrictionsTextFieldSize($index) {
		static $LookupExtendedHeaderRestrictionsTextFieldSize = array(
			0x00 => 'No restrictions',
			0x01 => 'No string is longer than 1024 characters',
			0x02 => 'No string is longer than 128 characters',
			0x03 => 'No string is longer than 30 characters',
		);
		return (isset($LookupExtendedHeaderRestrictionsTextFieldSize[$index]) ? $LookupExtendedHeaderRestrictionsTextFieldSize[$index] : '');
	}

/**
	 * @param int $index
	 *
	 * @return string
	 */
	public function LookupExtendedHeaderRestrictionsImageEncoding($index) {
		static $LookupExtendedHeaderRestrictionsImageEncoding = array(
			0x00 => 'No restrictions',
			0x01 => 'Images are encoded only with PNG or JPEG',
		);
		return (isset($LookupExtendedHeaderRestrictionsImageEncoding[$index]) ? $LookupExtendedHeaderRestrictionsImageEncoding[$index] : '');
	}

/**
	 * @param int $index
	 *
	 * @return string
	 */
	public function LookupExtendedHeaderRestrictionsImageSizeSize($index) {
		static $LookupExtendedHeaderRestrictionsImageSizeSize = array(
			0x00 => 'No restrictions',
			0x01 => 'All images are 256x256 pixels or smaller',
			0x02 => 'All images are 64x64 pixels or smaller',
			0x03 => 'All images are exactly 64x64 pixels, unless required otherwise',
		);
		return (isset($LookupExtendedHeaderRestrictionsImageSizeSize[$index]) ? $LookupExtendedHeaderRestrictionsImageSizeSize[$index] : '');
	}

/**
	 * @param string $currencyid
	 *
	 * @return string
	 */
	public function LookupCurrencyUnits($currencyid) {

$begin = __LINE__;

/** This is not a comment!

AED	Dirhams
			AFA	Afghanis
			ALL	Leke
			AMD	Drams
			ANG	Guilders
			AOA	Kwanza
			ARS	Pesos
			ATS	Schillings
			AUD	Dollars
			AWG	Guilders
			AZM	Manats
			BAM	Convertible Marka
			BBD	Dollars
			BDT	Taka
			BEF	Francs
			BGL	Leva
			BHD	Dinars
			BIF	Francs
			BMD	Dollars
			BND	Dollars
			BOB	Bolivianos
			BRL	Brazil Real
			BSD	Dollars
			BTN	Ngultrum
			BWP	Pulas
			BYR	Rubles
			BZD	Dollars
			CAD	Dollars
			CDF	Congolese Francs
			CHF	Francs
			CLP	Pesos
			CNY	Yuan Renminbi
			COP	Pesos
			CRC	Colones
			CUP	Pesos
			CVE	Escudos
			CYP	Pounds
			CZK	Koruny
			DEM	Deutsche Marks
			DJF	Francs
			DKK	Kroner
			DOP	Pesos
			DZD	Algeria Dinars
			EEK	Krooni
			EGP	Pounds
			ERN	Nakfa
			ESP	Pesetas
			ETB	Birr
			EUR	Euro
			FIM	Markkaa
			FJD	Dollars
			FKP	Pounds
			FRF	Francs
			GBP	Pounds
			GEL	Lari
			GGP	Pounds
			GHC	Cedis
			GIP	Pounds
			GMD	Dalasi
			GNF	Francs
			GRD	Drachmae
			GTQ	Quetzales
			GYD	Dollars
			HKD	Dollars
			HNL	Lempiras
			HRK	Kuna
			HTG	Gourdes
			HUF	Forints
			IDR	Rupiahs
			IEP	Pounds
			ILS	New Shekels
			IMP	Pounds
			INR	Rupees
			IQD	Dinars
			IRR	Rials
			ISK	Kronur
			ITL	Lire
			JEP	Pounds
			JMD	Dollars
			JOD	Dinars
			JPY	Yen
			KES	Shillings
			KGS	Soms
			KHR	Riels
			KMF	Francs
			KPW	Won
			KWD	Dinars
			KYD	Dollars
			KZT	Tenge
			LAK	Kips
			LBP	Pounds
			LKR	Rupees
			LRD	Dollars
			LSL	Maloti
			LTL	Litai
			LUF	Francs
			LVL	Lati
			LYD	Dinars
			MAD	Dirhams
			MDL	Lei
			MGF	Malagasy Francs
			MKD	Denars
			MMK	Kyats
			MNT	Tugriks
			MOP	Patacas
			MRO	Ouguiyas
			MTL	Liri
			MUR	Rupees
			MVR	Rufiyaa
			MWK	Kwachas
			MXN	Pesos
			MYR	Ringgits
			MZM	Meticais
			NAD	Dollars
			NGN	Nairas
			NIO	Gold Cordobas
			NLG	Guilders
			NOK	Krone
			NPR	Nepal Rupees
			NZD	Dollars
			OMR	Rials
			PAB	Balboa
			PEN	Nuevos Soles
			PGK	Kina
			PHP	Pesos
			PKR	Rupees
			PLN	Zlotych
			PTE	Escudos
			PYG	Guarani
			QAR	Rials
			ROL	Lei
			RUR	Rubles
			RWF	Rwanda Francs
			SAR	Riyals
			SBD	Dollars
			SCR	Rupees
			SDD	Dinars
			SEK	Kronor
			SGD	Dollars
			SHP	Pounds
			SIT	Tolars
			SKK	Koruny
			SLL	Leones
			SOS	Shillings
			SPL	Luigini
			SRG	Guilders
			STD	Dobras
			SVC	Colones
			SYP	Pounds
			SZL	Emalangeni
			THB	Baht
			TJR	Rubles
			TMM	Manats
			TND	Dinars
			TOP	Pa'anga
			TRL	Liras (old)
			TRY	Liras
			TTD	Dollars
			TVD	Tuvalu Dollars
			TWD	New Dollars
			TZS	Shillings
			UAH	Hryvnia
			UGX	Shillings
			USD	Dollars
			UYU	Pesos
			UZS	Sums
			VAL	Lire
			VEB	Bolivares
			VND	Dong
			VUV	Vatu
			WST	Tala
			XAF	Francs
			XAG	Ounces
			XAU	Ounces
			XCD	Dollars
			XDR	Special Drawing Rights
			XPD	Ounces
			XPF	Francs
			XPT	Ounces
			YER	Rials
			YUM	New Dinars
			ZAR	Rand
			ZMK	Kwacha
			ZWD	Zimbabwe Dollars

return getid3_lib::EmbeddedLookup($currencyid, $begin, __LINE__, __FILE__, 'id3v2-currency-units');
	}

/**
	 * @param string $currencyid
	 *
	 * @return string
	 */
	public function LookupCurrencyCountry($currencyid) {

$begin = __LINE__;

/** This is not a comment!

AED	United Arab Emirates
			AFA	Afghanistan
			ALL	Albania
			AMD	Armenia
			ANG	Netherlands Antilles
			AOA	Angola
			ARS	Argentina
			ATS	Austria
			AUD	Australia
			AWG	Aruba
			AZM	Azerbaijan
			BAM	Bosnia and Herzegovina
			BBD	Barbados
			BDT	Bangladesh
			BEF	Belgium
			BGL	Bulgaria
			BHD	Bahrain
			BIF	Burundi
			BMD	Bermuda
			BND	Brunei Darussalam
			BOB	Bolivia
			BRL	Brazil
			BSD	Bahamas
			BTN	Bhutan
			BWP	Botswana
			BYR	Belarus
			BZD	Belize
			CAD	Canada
			CDF	Congo/Kinshasa
			CHF	Switzerland
			CLP	Chile
			CNY	China
			COP	Colombia
			CRC	Costa Rica
			CUP	Cuba
			CVE	Cape Verde
			CYP	Cyprus
			CZK	Czech Republic
			DEM	Germany
			DJF	Djibouti
			DKK	Denmark
			DOP	Dominican Republic
			DZD	Algeria
			EEK	Estonia
			EGP	Egypt
			ERN	Eritrea
			ESP	Spain
			ETB	Ethiopia
			EUR	Euro Member Countries
			FIM	Finland
			FJD	Fiji
			FKP	Falkland Islands (Malvinas)
			FRF	France
			GBP	United Kingdom
			GEL	Georgia
			GGP	Guernsey
			GHC	Ghana
			GIP	Gibraltar
			GMD	Gambia
			GNF	Guinea
			GRD	Greece
			GTQ	Guatemala
			GYD	Guyana
			HKD	Hong Kong
			HNL	Honduras
			HRK	Croatia
			HTG	Haiti
			HUF	Hungary
			IDR	Indonesia
			IEP	Ireland (Eire)
			ILS	Israel
			IMP	Isle of Man
			INR	India
			IQD	Iraq
			IRR	Iran
			ISK	Iceland
			ITL	Italy
			JEP	Jersey
			JMD	Jamaica
			JOD	Jordan
			JPY	Japan
			KES	Kenya
			KGS	Kyrgyzstan
			KHR	Cambodia
			KMF	Comoros
			KPW	Korea
			KWD	Kuwait
			KYD	Cayman Islands
			KZT	Kazakstan
			LAK	Laos
			LBP	Lebanon
			LKR	Sri Lanka
			LRD	Liberia
			LSL	Lesotho
			LTL	Lithuania
			LUF	Luxembourg
			LVL	Latvia
			LYD	Libya
			MAD	Morocco
			MDL	Moldova
			MGF	Madagascar
			MKD	Macedonia
			MMK	Myanmar (Burma)
			MNT	Mongolia
			MOP	Macau
			MRO	Mauritania
			MTL	Malta
			MUR	Mauritius
			MVR	Maldives (Maldive Islands)
			MWK	Malawi
			MXN	Mexico
			MYR	Malaysia
			MZM	Mozambique
			NAD	Namibia
			NGN	Nigeria
			NIO	Nicaragua
			NLG	Netherlands (Holland)
			NOK	Norway
			NPR	Nepal
			NZD	New Zealand
			OMR	Oman
			PAB	Panama
			PEN	Peru
			PGK	Papua New Guinea
			PHP	Philippines
			PKR	Pakistan
			PLN	Poland
			PTE	Portugal
			PYG	Paraguay
			QAR	Qatar
			ROL	Romania
			RUR	Russia
			RWF	Rwanda
			SAR	Saudi Arabia
			SBD	Solomon Islands
			SCR	Seychelles
			SDD	Sudan
			SEK	Sweden
			SGD	Singapore
			SHP	Saint Helena
			SIT	Slovenia
			SKK	Slovakia
			SLL	Sierra Leone
			SOS	Somalia
			SPL	Seborga
			SRG	Suriname
			STD	São Tome and Principe
			SVC	El Salvador
			SYP	Syria
			SZL	Swaziland
			THB	Thailand
			TJR	Tajikistan
			TMM	Turkmenistan
			TND	Tunisia
			TOP	Tonga
			TRL	Turkey
			TRY	Turkey
			TTD	Trinidad and Tobago
			TVD	Tuvalu
			TWD	Taiwan
			TZS	Tanzania
			UAH	Ukraine
			UGX	Uganda
			USD	United States of America
			UYU	Uruguay
			UZS	Uzbekistan
			VAL	Vatican City
			VEB	Venezuela
			VND	Viet Nam
			VUV	Vanuatu
			WST	Samoa
			XAF	Communauté Financière Africaine
			XAG	Silver
			XAU	Gold
			XCD	East Caribbean
			XDR	International Monetary Fund
			XPD	Palladium
			XPF	Comptoirs Français du Pacifique
			XPT	Platinum
			YER	Yemen
			YUM	Yugoslavia
			ZAR	South Africa
			ZMK	Zambia
			ZWD	Zimbabwe

return getid3_lib::EmbeddedLookup($currencyid, $begin, __LINE__, __FILE__, 'id3v2-currency-country');
	}

/**
	 * @param string $languagecode
	 * @param bool   $casesensitive
	 *
	 * @return string
	 */
	public static function LanguageLookup($languagecode, $casesensitive=false) {

if (!$casesensitive) {
			$languagecode = strtolower($languagecode);
		}

// http://www.id3.org/id3v2.4.0-structure.txt
		// [4.   ID3v2 frame overview]
		// The three byte language field, present in several frames, is used to
		// describe the language of the frame's content, according to ISO-639-2
		// [ISO-639-2]. The language should be represented in lower case. If the
		// language is not known the string "XXX" should be used.

// ISO 639-2 - http://www.id3.org/iso639-2.html

$begin = __LINE__;

/** This is not a comment!

XXX	unknown
			xxx	unknown
			aar	Afar
			abk	Abkhazian
			ace	Achinese
			ach	Acoli
			ada	Adangme
			afa	Afro-Asiatic (Other)
			afh	Afrihili
			afr	Afrikaans
			aka	Akan
			akk	Akkadian
			alb	Albanian
			ale	Aleut
			alg	Algonquian Languages
			amh	Amharic
			ang	English, Old (ca. 450-1100)
			apa	Apache Languages
			ara	Arabic
			arc	Aramaic
			arm	Armenian
			arn	Araucanian
			arp	Arapaho
			art	Artificial (Other)
			arw	Arawak
			asm	Assamese
			ath	Athapascan Languages
			ava	Avaric
			ave	Avestan
			awa	Awadhi
			aym	Aymara
			aze	Azerbaijani
			bad	Banda
			bai	Bamileke Languages
			bak	Bashkir
			bal	Baluchi
			bam	Bambara
			ban	Balinese
			baq	Basque
			bas	Basa
			bat	Baltic (Other)
			bej	Beja
			bel	Byelorussian
			bem	Bemba
			ben	Bengali
			ber	Berber (Other)
			bho	Bhojpuri
			bih	Bihari
			bik	Bikol
			bin	Bini
			bis	Bislama
			bla	Siksika
			bnt	Bantu (Other)
			bod	Tibetan
			bra	Braj
			bre	Breton
			bua	Buriat
			bug	Buginese
			bul	Bulgarian
			bur	Burmese
			cad	Caddo
			cai	Central American Indian (Other)
			car	Carib
			cat	Catalan
			cau	Caucasian (Other)
			ceb	Cebuano
			cel	Celtic (Other)
			ces	Czech
			cha	Chamorro
			chb	Chibcha
			che	Chechen
			chg	Chagatai
			chi	Chinese
			chm	Mari
			chn	Chinook jargon
			cho	Choctaw
			chr	Cherokee
			chu	Church Slavic
			chv	Chuvash
			chy	Cheyenne
			cop	Coptic
			cor	Cornish
			cos	Corsican
			cpe	Creoles and Pidgins, English-based (Other)
			cpf	Creoles and Pidgins, French-based (Other)
			cpp	Creoles and Pidgins, Portuguese-based (Other)
			cre	Cree
			crp	Creoles and Pidgins (Other)
			cus	Cushitic (Other)
			cym	Welsh
			cze	Czech
			dak	Dakota
			dan	Danish
			del	Delaware
			deu	German
			din	Dinka
			div	Divehi
			doi	Dogri
			dra	Dravidian (Other)
			dua	Duala
			dum	Dutch, Middle (ca. 1050-1350)
			dut	Dutch
			dyu	Dyula
			dzo	Dzongkha
			efi	Efik
			egy	Egyptian (Ancient)
			eka	Ekajuk
			ell	Greek, Modern (1453-)
			elx	Elamite
			eng	English
			enm	English, Middle (ca. 1100-1500)
			epo	Esperanto
			esk	Eskimo (Other)
			esl	Spanish
			est	Estonian
			eus	Basque
			ewe	Ewe
			ewo	Ewondo
			fan	Fang
			fao	Faroese
			fas	Persian
			fat	Fanti
			fij	Fijian
			fin	Finnish
			fiu	Finno-Ugrian (Other)
			fon	Fon
			fra	French
			fre	French
			frm	French, Middle (ca. 1400-1600)
			fro	French, Old (842- ca. 1400)
			fry	Frisian
			ful	Fulah
			gaa	Ga
			gae	Gaelic (Scots)
			gai	Irish
			gay	Gayo
			gdh	Gaelic (Scots)
			gem	Germanic (Other)
			geo	Georgian
			ger	German
			gez	Geez
			gil	Gilbertese
			glg	Gallegan
			gmh	German, Middle High (ca. 1050-1500)
			goh	German, Old High (ca. 750-1050)
			gon	Gondi
			got	Gothic
			grb	Grebo
			grc	Greek, Ancient (to 1453)
			gre	Greek, Modern (1453-)
			grn	Guarani
			guj	Gujarati
			hai	Haida
			hau	Hausa
			haw	Hawaiian
			heb	Hebrew
			her	Herero
			hil	Hiligaynon
			him	Himachali
			hin	Hindi
			hmo	Hiri Motu
			hun	Hungarian
			hup	Hupa
			hye	Armenian
			iba	Iban
			ibo	Igbo
			ice	Icelandic
			ijo	Ijo
			iku	Inuktitut
			ilo	Iloko
			ina	Interlingua (International Auxiliary language Association)
			inc	Indic (Other)
			ind	Indonesian
			ine	Indo-European (Other)
			ine	Interlingue
			ipk	Inupiak
			ira	Iranian (Other)
			iri	Irish
			iro	Iroquoian uages
			isl	Icelandic
			ita	Italian
			jav	Javanese
			jaw	Javanese
			jpn	Japanese
			jpr	Judeo-Persian
			jrb	Judeo-Arabic
			kaa	Kara-Kalpak
			kab	Kabyle
			kac	Kachin
			kal	Greenlandic
			kam	Kamba
			kan	Kannada
			kar	Karen
			kas	Kashmiri
			kat	Georgian
			kau	Kanuri
			kaw	Kawi
			kaz	Kazakh
			kha	Khasi
			khi	Khoisan (Other)
			khm	Khmer
			kho	Khotanese
			kik	Kikuyu
			kin	Kinyarwanda
			kir	Kirghiz
			kok	Konkani
			kom	Komi
			kon	Kongo
			kor	Korean
			kpe	Kpelle
			kro	Kru
			kru	Kurukh
			kua	Kuanyama
			kum	Kumyk
			kur	Kurdish
			kus	Kusaie
			kut	Kutenai
			lad	Ladino
			lah	Lahnda
			lam	Lamba
			lao	Lao
			lat	Latin
			lav	Latvian
			lez	Lezghian
			lin	Lingala
			lit	Lithuanian
			lol	Mongo
			loz	Lozi
			ltz	Letzeburgesch
			lub	Luba-Katanga
			lug	Ganda
			lui	Luiseno
			lun	Lunda
			luo	Luo (Kenya and Tanzania)
			mac	Macedonian
			mad	Madurese
			mag	Magahi
			mah	Marshall
			mai	Maithili
			mak	Macedonian
			mak	Makasar
			mal	Malayalam
			man	Mandingo
			mao	Maori
			map	Austronesian (Other)
			mar	Marathi
			mas	Masai
			max	Manx
			may	Malay
			men	Mende
			mga	Irish, Middle (900 - 1200)
			mic	Micmac
			min	Minangkabau
			mis	Miscellaneous (Other)
			mkh	Mon-Kmer (Other)
			mlg	Malagasy
			mlt	Maltese
			mni	Manipuri
			mno	Manobo Languages
			moh	Mohawk
			mol	Moldavian
			mon	Mongolian
			mos	Mossi
			mri	Maori
			msa	Malay
			mul	Multiple Languages
			mun	Munda Languages
			mus	Creek
			mwr	Marwari
			mya	Burmese
			myn	Mayan Languages
			nah	Aztec
			nai	North American Indian (Other)
			nau	Nauru
			nav	Navajo
			nbl	Ndebele, South
			nde	Ndebele, North
			ndo	Ndongo
			nep	Nepali
			new	Newari
			nic	Niger-Kordofanian (Other)
			niu	Niuean
			nla	Dutch
			nno	Norwegian (Nynorsk)
			non	Norse, Old
			nor	Norwegian
			nso	Sotho, Northern
			nub	Nubian Languages
			nya	Nyanja
			nym	Nyamwezi
			nyn	Nyankole
			nyo	Nyoro
			nzi	Nzima
			oci	Langue d'Oc (post 1500)
			oji	Ojibwa
			ori	Oriya
			orm	Oromo
			osa	Osage
			oss	Ossetic
			ota	Turkish, Ottoman (1500 - 1928)
			oto	Otomian Languages
			paa	Papuan-Australian (Other)
			pag	Pangasinan
			pal	Pahlavi
			pam	Pampanga
			pan	Panjabi
			pap	Papiamento
			pau	Palauan
			peo	Persian, Old (ca 600 - 400 B.C.)
			per	Persian
			phn	Phoenician
			pli	Pali
			pol	Polish
			pon	Ponape
			por	Portuguese
			pra	Prakrit uages
			pro	Provencal, Old (to 1500)
			pus	Pushto
			que	Quechua
			raj	Rajasthani
			rar	Rarotongan
			roa	Romance (Other)
			roh	Rhaeto-Romance
			rom	Romany
			ron	Romanian
			rum	Romanian
			run	Rundi
			rus	Russian
			sad	Sandawe
			sag	Sango
			sah	Yakut
			sai	South American Indian (Other)
			sal	Salishan Languages
			sam	Samaritan Aramaic
			san	Sanskrit
			sco	Scots
			scr	Serbo-Croatian
			sel	Selkup
			sem	Semitic (Other)
			sga	Irish, Old (to 900)
			shn	Shan
			sid	Sidamo
			sin	Singhalese
			sio	Siouan Languages
			sit	Sino-Tibetan (Other)
			sla	Slavic (Other)
			slk	Slovak
			slo	Slovak
			slv	Slovenian
			smi	Sami Languages
			smo	Samoan
			sna	Shona
			snd	Sindhi
			sog	Sogdian
			som	Somali
			son	Songhai
			sot	Sotho, Southern
			spa	Spanish
			sqi	Albanian
			srd	Sardinian
			srr	Serer
			ssa	Nilo-Saharan (Other)
			ssw	Siswant
			ssw	Swazi
			suk	Sukuma
			sun	Sudanese
			sus	Susu
			sux	Sumerian
			sve	Swedish
			swa	Swahili
			swe	Swedish
			syr	Syriac
			tah	Tahitian
			tam	Tamil
			tat	Tatar
			tel	Telugu
			tem	Timne
			ter	Tereno
			tgk	Tajik
			tgl	Tagalog
			tha	Thai
			tib	Tibetan
			tig	Tigre
			tir	Tigrinya
			tiv	Tivi
			tli	Tlingit
			tmh	Tamashek
			tog	Tonga (Nyasa)
			ton	Tonga (Tonga Islands)
			tru	Truk
			tsi	Tsimshian
			tsn	Tswana
			tso	Tsonga
			tuk	Turkmen
			tum	Tumbuka
			tur	Turkish
			tut	Altaic (Other)
			twi	Twi
			tyv	Tuvinian
			uga	Ugaritic
			uig	Uighur
			ukr	Ukrainian
			umb	Umbundu
			und	Undetermined
			urd	Urdu
			uzb	Uzbek
			vai	Vai
			ven	Venda
			vie	Vietnamese
			vol	Volapük
			vot	Votic
			wak	Wakashan Languages
			wal	Walamo
			war	Waray
			was	Washo
			wel	Welsh
			wen	Sorbian Languages
			wol	Wolof
			xho	Xhosa
			yao	Yao
			yap	Yap
			yid	Yiddish
			yor	Yoruba
			zap	Zapotec
			zen	Zenaga
			zha	Zhuang
			zho	Chinese
			zul	Zulu
			zun	Zuni

return getid3_lib::EmbeddedLookup($languagecode, $begin, __LINE__, __FILE__, 'id3v2-languagecode');
	}

/**
	 * @param int $index
	 *
	 * @return string
	 */
	public static function ETCOEventLookup($index) {
		if (($index >= 0x17) && ($index <= 0xDF)) {
			return 'reserved for future use';
		}
		if (($index >= 0xE0) && ($index <= 0xEF)) {
			return 'not predefined synch 0-F';
		}
		if (($index >= 0xF0) && ($index <= 0xFC)) {
			return 'reserved for future use';
		}

static $EventLookup = array(
			0x00 => 'padding (has no meaning)',
			0x01 => 'end of initial silence',
			0x02 => 'intro start',
			0x03 => 'main part start',
			0x04 => 'outro start',
			0x05 => 'outro end',
			0x06 => 'verse start',
			0x07 => 'refrain start',
			0x08 => 'interlude start',
			0x09 => 'theme start',
			0x0A => 'variation start',
			0x0B => 'key change',
			0x0C => 'time change',
			0x0D => 'momentary unwanted noise (Snap, Crackle & Pop)',
			0x0E => 'sustained noise',
			0x0F => 'sustained noise end',
			0x10 => 'intro end',
			0x11 => 'main part end',
			0x12 => 'verse end',
			0x13 => 'refrain end',
			0x14 => 'theme end',
			0x15 => 'profanity',
			0x16 => 'profanity end',
			0xFD => 'audio end (start of silence)',
			0xFE => 'audio file ends',
			0xFF => 'one more byte of events follows'
		);

return (isset($EventLookup[$index]) ? $EventLookup[$index] : '');
	}

/**
	 * @param int $index
	 *
	 * @return string
	 */
	public static function SYTLContentTypeLookup($index) {
		static $SYTLContentTypeLookup = array(
			0x00 => 'other',
			0x01 => 'lyrics',
			0x02 => 'text transcription',
			0x03 => 'movement/part name', // (e.g. 'Adagio')
			0x04 => 'events',             // (e.g. 'Don Quijote enters the stage')
			0x05 => 'chord',              // (e.g. 'Bb F Fsus')
			0x06 => 'trivia/\'pop up\' information',
			0x07 => 'URLs to webpages',
			0x08 => 'URLs to images'
		);

return (isset($SYTLContentTypeLookup[$index]) ? $SYTLContentTypeLookup[$index] : '');
	}

/**
	 * @param int   $index
	 * @param bool $returnarray
	 *
	 * @return array|string
	 */
	public static function APICPictureTypeLookup($index, $returnarray=false) {
		static $APICPictureTypeLookup = array(
			0x00 => 'Other',
			0x01 => '32x32 pixels \'file icon\' (PNG only)',
			0x02 => 'Other file icon',
			0x03 => 'Cover (front)',
			0x04 => 'Cover (back)',
			0x05 => 'Leaflet page',
			0x06 => 'Media (e.g. label side of CD)',
			0x07 => 'Lead artist/lead performer/soloist',
			0x08 => 'Artist/performer',
			0x09 => 'Conductor',
			0x0A => 'Band/Orchestra',
			0x0B => 'Composer',
			0x0C => 'Lyricist/text writer',
			0x0D => 'Recording Location',
			0x0E => 'During recording',
			0x0F => 'During performance',
			0x10 => 'Movie/video screen capture',
			0x11 => 'A bright coloured fish',
			0x12 => 'Illustration',
			0x13 => 'Band/artist logotype',
			0x14 => 'Publisher/Studio logotype'
		);
		if ($returnarray) {
			return $APICPictureTypeLookup;
		}
		return (isset($APICPictureTypeLookup[$index]) ? $APICPictureTypeLookup[$index] : '');
	}

/**
	 * @param int $index
	 *
	 * @return string
	 */
	public static function COMRReceivedAsLookup($index) {
		static $COMRReceivedAsLookup = array(
			0x00 => 'Other',
			0x01 => 'Standard CD album with other songs',
			0x02 => 'Compressed audio on CD',
			0x03 => 'File over the Internet',
			0x04 => 'Stream over the Internet',
			0x05 => 'As note sheets',
			0x06 => 'As note sheets in a book with other sheets',
			0x07 => 'Music on other media',
			0x08 => 'Non-musical merchandise'
		);

return (isset($COMRReceivedAsLookup[$index]) ? $COMRReceivedAsLookup[$index] : '');
	}

/**
	 * @param int $index
	 *
	 * @return string
	 */
	public static function RVA2ChannelTypeLookup($index) {
		static $RVA2ChannelTypeLookup = array(
			0x00 => 'Other',
			0x01 => 'Master volume',
			0x02 => 'Front right',
			0x03 => 'Front left',
			0x04 => 'Back right',
			0x05 => 'Back left',
			0x06 => 'Front centre',
			0x07 => 'Back centre',
			0x08 => 'Subwoofer'
		);

return (isset($RVA2ChannelTypeLookup[$index]) ? $RVA2ChannelTypeLookup[$index] : '');
	}

/**
	 * @param string $framename
	 *
	 * @return string
	 */
	public static function FrameNameLongLookup($framename) {

$begin = __LINE__;

/** This is not a comment!

AENC	Audio encryption
			APIC	Attached picture
			ASPI	Audio seek point index
			BUF	Recommended buffer size
			CNT	Play counter
			COM	Comments
			COMM	Comments
			COMR	Commercial frame
			CRA	Audio encryption
			CRM	Encrypted meta frame
			ENCR	Encryption method registration
			EQU	Equalisation
			EQU2	Equalisation (2)
			EQUA	Equalisation
			ETC	Event timing codes
			ETCO	Event timing codes
			GEO	General encapsulated object
			GEOB	General encapsulated object
			GRID	Group identification registration
			IPL	Involved people list
			IPLS	Involved people list
			LINK	Linked information
			LNK	Linked information
			MCDI	Music CD identifier
			MCI	Music CD Identifier
			MLL	MPEG location lookup table
			MLLT	MPEG location lookup table
			OWNE	Ownership frame
			PCNT	Play counter
			PIC	Attached picture
			POP	Popularimeter
			POPM	Popularimeter
			POSS	Position synchronisation frame
			PRIV	Private frame
			RBUF	Recommended buffer size
			REV	Reverb
			RVA	Relative volume adjustment
			RVA2	Relative volume adjustment (2)
			RVAD	Relative volume adjustment
			RVRB	Reverb
			SEEK	Seek frame
			SIGN	Signature frame
			SLT	Synchronised lyric/text
			STC	Synced tempo codes
			SYLT	Synchronised lyric/text
			SYTC	Synchronised tempo codes
			TAL	Album/Movie/Show title
			TALB	Album/Movie/Show title
			TBP	BPM (Beats Per Minute)
			TBPM	BPM (beats per minute)
			TCM	Composer
			TCMP	Part of a compilation
			TCO	Content type
			TCOM	Composer
			TCON	Content type
			TCOP	Copyright message
			TCP	Part of a compilation
			TCR	Copyright message
			TDA	Date
			TDAT	Date
			TDEN	Encoding time
			TDLY	Playlist delay
			TDOR	Original release time
			TDRC	Recording time
			TDRL	Release time
			TDTG	Tagging time
			TDY	Playlist delay
			TEN	Encoded by
			TENC	Encoded by
			TEXT	Lyricist/Text writer
			TFLT	File type
			TFT	File type
			TIM	Time
			TIME	Time
			TIPL	Involved people list
			TIT1	Content group description
			TIT2	Title/songname/content description
			TIT3	Subtitle/Description refinement
			TKE	Initial key
			TKEY	Initial key
			TLA	Language(s)
			TLAN	Language(s)
			TLE	Length
			TLEN	Length
			TMCL	Musician credits list
			TMED	Media type
			TMOO	Mood
			TMT	Media type
			TOA	Original artist(s)/performer(s)
			TOAL	Original album/movie/show title
			TOF	Original filename
			TOFN	Original filename
			TOL	Original Lyricist(s)/text writer(s)
			TOLY	Original lyricist(s)/text writer(s)
			TOPE	Original artist(s)/performer(s)
			TOR	Original release year
			TORY	Original release year
			TOT	Original album/Movie/Show title
			TOWN	File owner/licensee
			TP1	Lead artist(s)/Lead performer(s)/Soloist(s)/Performing group
			TP2	Band/Orchestra/Accompaniment
			TP3	Conductor/Performer refinement
			TP4	Interpreted, remixed, or otherwise modified by
			TPA	Part of a set
			TPB	Publisher
			TPE1	Lead performer(s)/Soloist(s)
			TPE2	Band/orchestra/accompaniment
			TPE3	Conductor/performer refinement
			TPE4	Interpreted, remixed, or otherwise modified by
			TPOS	Part of a set
			TPRO	Produced notice
			TPUB	Publisher
			TRC	ISRC (International Standard Recording Code)
			TRCK	Track number/Position in set
			TRD	Recording dates
			TRDA	Recording dates
			TRK	Track number/Position in set
			TRSN	Internet radio station name
			TRSO	Internet radio station owner
			TS2	Album-Artist sort order
			TSA	Album sort order
			TSC	Composer sort order
			TSI	Size
			TSIZ	Size
			TSO2	Album-Artist sort order
			TSOA	Album sort order
			TSOC	Composer sort order
			TSOP	Performer sort order
			TSOT	Title sort order
			TSP	Performer sort order
			TSRC	ISRC (international standard recording code)
			TSS	Software/hardware and settings used for encoding
			TSSE	Software/Hardware and settings used for encoding
			TSST	Set subtitle
			TST	Title sort order
			TT1	Content group description
			TT2	Title/Songname/Content description
			TT3	Subtitle/Description refinement
			TXT	Lyricist/text writer
			TXX	User defined text information frame
			TXXX	User defined text information frame
			TYE	Year
			TYER	Year
			UFI	Unique file identifier
			UFID	Unique file identifier
			ULT	Unsynchronised lyric/text transcription
			USER	Terms of use
			USLT	Unsynchronised lyric/text transcription
			WAF	Official audio file webpage
			WAR	Official artist/performer webpage
			WAS	Official audio source webpage
			WCM	Commercial information
			WCOM	Commercial information
			WCOP	Copyright/Legal information
			WCP	Copyright/Legal information
			WOAF	Official audio file webpage
			WOAR	Official artist/performer webpage
			WOAS	Official audio source webpage
			WORS	Official Internet radio station homepage
			WPAY	Payment
			WPB	Publishers official webpage
			WPUB	Publishers official webpage
			WXX	User defined URL link frame
			WXXX	User defined URL link frame
			TFEA	Featured Artist
			TSTU	Recording Studio
			rgad	Replay Gain Adjustment

return getid3_lib::EmbeddedLookup($framename, $begin, __LINE__, __FILE__, 'id3v2-framename_long');

// Last three:
		// from Helium2 [www.helium2.com]
		// from http://privatewww.essex.ac.uk/~djmrob/replaygain/file_format_id3v2.html
	}

/**
	 * @param string $framename
	 *
	 * @return string
	 */
	public static function FrameNameShortLookup($framename) {

$begin = __LINE__;

/** This is not a comment!

AENC	audio_encryption
			APIC	attached_picture
			ASPI	audio_seek_point_index
			BUF	recommended_buffer_size
			CNT	play_counter
			COM	comment
			COMM	comment
			COMR	commercial_frame
			CRA	audio_encryption
			CRM	encrypted_meta_frame
			ENCR	encryption_method_registration
			EQU	equalisation
			EQU2	equalisation
			EQUA	equalisation
			ETC	event_timing_codes
			ETCO	event_timing_codes
			GEO	general_encapsulated_object
			GEOB	general_encapsulated_object
			GRID	group_identification_registration
			IPL	involved_people_list
			IPLS	involved_people_list
			LINK	linked_information
			LNK	linked_information
			MCDI	music_cd_identifier
			MCI	music_cd_identifier
			MLL	mpeg_location_lookup_table
			MLLT	mpeg_location_lookup_table
			OWNE	ownership_frame
			PCNT	play_counter
			PIC	attached_picture
			POP	popularimeter
			POPM	popularimeter
			POSS	position_synchronisation_frame
			PRIV	private_frame
			RBUF	recommended_buffer_size
			REV	reverb
			RVA	relative_volume_adjustment
			RVA2	relative_volume_adjustment
			RVAD	relative_volume_adjustment
			RVRB	reverb
			SEEK	seek_frame
			SIGN	signature_frame
			SLT	synchronised_lyric
			STC	synced_tempo_codes
			SYLT	synchronised_lyric
			SYTC	synchronised_tempo_codes
			TAL	album
			TALB	album
			TBP	bpm
			TBPM	bpm
			TCM	composer
			TCMP	part_of_a_compilation
			TCO	genre
			TCOM	composer
			TCON	genre
			TCOP	copyright_message
			TCP	part_of_a_compilation
			TCR	copyright_message
			TDA	date
			TDAT	date
			TDEN	encoding_time
			TDLY	playlist_delay
			TDOR	original_release_time
			TDRC	recording_time
			TDRL	release_time
			TDTG	tagging_time
			TDY	playlist_delay
			TEN	encoded_by
			TENC	encoded_by
			TEXT	lyricist
			TFLT	file_type
			TFT	file_type
			TIM	time
			TIME	time
			TIPL	involved_people_list
			TIT1	content_group_description
			TIT2	title
			TIT3	subtitle
			TKE	initial_key
			TKEY	initial_key
			TLA	language
			TLAN	language
			TLE	length
			TLEN	length
			TMCL	musician_credits_list
			TMED	media_type
			TMOO	mood
			TMT	media_type
			TOA	original_artist
			TOAL	original_album
			TOF	original_filename
			TOFN	original_filename
			TOL	original_lyricist
			TOLY	original_lyricist
			TOPE	original_artist
			TOR	original_year
			TORY	original_year
			TOT	original_album
			TOWN	file_owner
			TP1	artist
			TP2	band
			TP3	conductor
			TP4	remixer
			TPA	part_of_a_set
			TPB	publisher
			TPE1	artist
			TPE2	band
			TPE3	conductor
			TPE4	remixer
			TPOS	part_of_a_set
			TPRO	produced_notice
			TPUB	publisher
			TRC	isrc
			TRCK	track_number
			TRD	recording_dates
			TRDA	recording_dates
			TRK	track_number
			TRSN	internet_radio_station_name
			TRSO	internet_radio_station_owner
			TS2	album_artist_sort_order
			TSA	album_sort_order
			TSC	composer_sort_order
			TSI	size
			TSIZ	size
			TSO2	album_artist_sort_order
			TSOA	album_sort_order
			TSOC	composer_sort_order
			TSOP	performer_sort_order
			TSOT	title_sort_order
			TSP	performer_sort_order
			TSRC	isrc
			TSS	encoder_settings
			TSSE	encoder_settings
			TSST	set_subtitle
			TST	title_sort_order
			TT1	content_group_description
			TT2	title
			TT3	subtitle
			TXT	lyricist
			TXX	text
			TXXX	text
			TYE	year
			TYER	year
			UFI	unique_file_identifier
			UFID	unique_file_identifier
			ULT	unsynchronised_lyric
			USER	terms_of_use
			USLT	unsynchronised_lyric
			WAF	url_file
			WAR	url_artist
			WAS	url_source
			WCM	commercial_information
			WCOM	commercial_information
			WCOP	copyright
			WCP	copyright
			WOAF	url_file
			WOAR	url_artist
			WOAS	url_source
			WORS	url_station
			WPAY	url_payment
			WPB	url_publisher
			WPUB	url_publisher
			WXX	url_user
			WXXX	url_user
			TFEA	featured_artist
			TSTU	recording_studio
			rgad	replay_gain_adjustment

return getid3_lib::EmbeddedLookup($framename, $begin, __LINE__, __FILE__, 'id3v2-framename_short');
	}

/**
	 * @param string $encoding
	 *
	 * @return string
	 */
	public static function TextEncodingTerminatorLookup($encoding) {
		// http://www.id3.org/id3v2.4.0-structure.txt
		// Frames that allow different types of text encoding contains a text encoding description byte. Possible encodings:
		static $TextEncodingTerminatorLookup = array(
			0   => "\x00",     // $00  ISO-8859-1. Terminated with $00.
			1   => "\x00\x00", // $01  UTF-16 encoded Unicode with BOM. All strings in the same frame SHALL have the same byteorder. Terminated with $00 00.
			2   => "\x00\x00", // $02  UTF-16BE encoded Unicode without BOM. Terminated with $00 00.
			3   => "\x00",     // $03  UTF-8 encoded Unicode. Terminated with $00.
			255 => "\x00\x00"
		);
		return (isset($TextEncodingTerminatorLookup[$encoding]) ? $TextEncodingTerminatorLookup[$encoding] : "\x00");
	}

/**
	 * @param int $encoding
	 *
	 * @return string
	 */
	public static function TextEncodingNameLookup($encoding) {
		// http://www.id3.org/id3v2.4.0-structure.txt
		// Frames that allow different types of text encoding contains a text encoding description byte. Possible encodings:
		static $TextEncodingNameLookup = array(
			0   => 'ISO-8859-1', // $00  ISO-8859-1. Terminated with $00.
			1   => 'UTF-16',     // $01  UTF-16 encoded Unicode with BOM. All strings in the same frame SHALL have the same byteorder. Terminated with $00 00.
			2   => 'UTF-16BE',   // $02  UTF-16BE encoded Unicode without BOM. Terminated with $00 00.
			3   => 'UTF-8',      // $03  UTF-8 encoded Unicode. Terminated with $00.
			255 => 'UTF-16BE'
		);
		return (isset($TextEncodingNameLookup[$encoding]) ? $TextEncodingNameLookup[$encoding] : 'ISO-8859-1');
	}

/**
	 * @param string $string
	 * @param string $terminator
	 *
	 * @return string
	 */
	public static function RemoveStringTerminator($string, $terminator) {
		// Null terminator at end of comment string is somewhat ambiguous in the specification, may or may not be implemented by various taggers. Remove terminator only if present.
		// https://github.com/JamesHeinrich/getID3/issues/121
		// https://community.mp3tag.de/t/x-trailing-nulls-in-id3v2-comments/19227
		if (substr($string, -strlen($terminator), strlen($terminator)) === $terminator) {
			$string = substr($string, 0, -strlen($terminator));
		}
		return $string;
	}

/**
	 * @param string $string
	 *
	 * @return string
	 */
	public static function MakeUTF16emptyStringEmpty($string) {
		if (in_array($string, array("\x00", "\x00\x00", "\xFF\xFE", "\xFE\xFF"))) {
			// if string only contains a BOM or terminator then make it actually an empty string
			$string = '';
		}
		return $string;
	}

/**
	 * @param string $framename
	 * @param int    $id3v2majorversion
	 *
	 * @return bool|int
	 */
	public static function IsValidID3v2FrameName($framename, $id3v2majorversion) {
		switch ($id3v2majorversion) {
			case 2:
				return preg_match('#[A-Z][A-Z0-9]{2}#', $framename);

case 3:
			case 4:
				return preg_match('#[A-Z][A-Z0-9]{3}#', $framename);
		}
		return false;
	}

/**
	 * @param string $numberstring
	 * @param bool   $allowdecimal
	 * @param bool   $allownegative
	 *
	 * @return bool
	 */
	public static function IsANumber($numberstring, $allowdecimal=false, $allownegative=false) {
		$pattern  = '#^';
		$pattern .= ($allownegative ? '\\-?' : '');
		$pattern .= '[0-9]+';
		$pattern .= ($allowdecimal  ? '(\\.[0-9]+)?' : '');
		$pattern .= '$#';
		return preg_match($pattern, $numberstring);
	}

/**
	 * @param string $datestamp
	 *
	 * @return bool
	 */
	public static function IsValidDateStampString($datestamp) {
		if (!preg_match('#^[12][0-9]{3}[01][0-9][0123][0-9]$#', $datestamp)) {
			return false;
		}
		$year  = substr($datestamp, 0, 4);
		$month = substr($datestamp, 4, 2);
		$day   = substr($datestamp, 6, 2);
		if (($year == 0) || ($month == 0) || ($day == 0)) {
			return false;
		}
		if ($month > 12) {
			return false;
		}
		if ($day > 31) {
			return false;
		}
		if (($day > 30) && (($month == 4) || ($month == 6) || ($month == 9) || ($month == 11))) {
			return false;
		}
		if (($day > 29) && ($month == 2)) {
			return false;
		}
		return true;
	}

/**
	 * @param int $majorversion
	 *
	 * @return int
	 */
	public static function ID3v2HeaderLength($majorversion) {
		return (($majorversion == 2) ? 6 : 10);
	}

/**
	 * @param string $frame_name
	 *
	 * @return string|false
	 */
	public static function ID3v22iTunesBrokenFrameName($frame_name) {
		// iTunes (multiple versions) has been known to write ID3v2.3 style frames
		// but use ID3v2.2 frame names, right-padded using either [space] or [null]
		// to make them fit in the 4-byte frame name space of the ID3v2.3 frame.
		// This function will detect and translate the corrupt frame name into ID3v2.3 standard.
		static $ID3v22_iTunes_BrokenFrames = array(
			'BUF' => 'RBUF', // Recommended buffer size
			'CNT' => 'PCNT', // Play counter
			'COM' => 'COMM', // Comments
			'CRA' => 'AENC', // Audio encryption
			'EQU' => 'EQUA', // Equalisation
			'ETC' => 'ETCO', // Event timing codes
			'GEO' => 'GEOB', // General encapsulated object
			'IPL' => 'IPLS', // Involved people list
			'LNK' => 'LINK', // Linked information
			'MCI' => 'MCDI', // Music CD identifier
			'MLL' => 'MLLT', // MPEG location lookup table
			'PIC' => 'APIC', // Attached picture
			'POP' => 'POPM', // Popularimeter
			'REV' => 'RVRB', // Reverb
			'RVA' => 'RVAD', // Relative volume adjustment
			'SLT' => 'SYLT', // Synchronised lyric/text
			'STC' => 'SYTC', // Synchronised tempo codes
			'TAL' => 'TALB', // Album/Movie/Show title
			'TBP' => 'TBPM', // BPM (beats per minute)
			'TCM' => 'TCOM', // Composer
			'TCO' => 'TCON', // Content type
			'TCP' => 'TCMP', // Part of a compilation
			'TCR' => 'TCOP', // Copyright message
			'TDA' => 'TDAT', // Date
			'TDY' => 'TDLY', // Playlist delay
			'TEN' => 'TENC', // Encoded by
			'TFT' => 'TFLT', // File type
			'TIM' => 'TIME', // Time
			'TKE' => 'TKEY', // Initial key
			'TLA' => 'TLAN', // Language(s)
			'TLE' => 'TLEN', // Length
			'TMT' => 'TMED', // Media type
			'TOA' => 'TOPE', // Original artist(s)/performer(s)
			'TOF' => 'TOFN', // Original filename
			'TOL' => 'TOLY', // Original lyricist(s)/text writer(s)
			'TOR' => 'TORY', // Original release year
			'TOT' => 'TOAL', // Original album/movie/show title
			'TP1' => 'TPE1', // Lead performer(s)/Soloist(s)
			'TP2' => 'TPE2', // Band/orchestra/accompaniment
			'TP3' => 'TPE3', // Conductor/performer refinement
			'TP4' => 'TPE4', // Interpreted, remixed, or otherwise modified by
			'TPA' => 'TPOS', // Part of a set
			'TPB' => 'TPUB', // Publisher
			'TRC' => 'TSRC', // ISRC (international standard recording code)
			'TRD' => 'TRDA', // Recording dates
			'TRK' => 'TRCK', // Track number/Position in set
			'TS2' => 'TSO2', // Album-Artist sort order
			'TSA' => 'TSOA', // Album sort order
			'TSC' => 'TSOC', // Composer sort order
			'TSI' => 'TSIZ', // Size
			'TSP' => 'TSOP', // Performer sort order
			'TSS' => 'TSSE', // Software/Hardware and settings used for encoding
			'TST' => 'TSOT', // Title sort order
			'TT1' => 'TIT1', // Content group description
			'TT2' => 'TIT2', // Title/songname/content description
			'TT3' => 'TIT3', // Subtitle/Description refinement
			'TXT' => 'TEXT', // Lyricist/Text writer
			'TXX' => 'TXXX', // User defined text information frame
			'TYE' => 'TYER', // Year
			'UFI' => 'UFID', // Unique file identifier
			'ULT' => 'USLT', // Unsynchronised lyric/text transcription
			'WAF' => 'WOAF', // Official audio file webpage
			'WAR' => 'WOAR', // Official artist/performer webpage
			'WAS' => 'WOAS', // Official audio source webpage
			'WCM' => 'WCOM', // Commercial information
			'WCP' => 'WCOP', // Copyright/Legal information
			'WPB' => 'WPUB', // Publishers official webpage
			'WXX' => 'WXXX', // User defined URL link frame
		);
		if (strlen($frame_name) == 4) {
			if ((substr($frame_name, 3, 1) == ' ') || (substr($frame_name, 3, 1) == "\x00")) {
				if (isset($ID3v22_iTunes_BrokenFrames[substr($frame_name, 0, 3)])) {
					return $ID3v22_iTunes_BrokenFrames[substr($frame_name, 0, 3)];
				}
			}
		}
		return false;
	}

}

����������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������module.audio.ogg.php��������������������������������������������������������������������������������0000644�����������������00000125361�15150061000�0010411 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������<?php

/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org>               //
//  available at https://github.com/JamesHeinrich/getID3       //
//            or https://www.getid3.org                        //
//            or http://getid3.sourceforge.net                 //
//  see readme.txt for more details                            //
/////////////////////////////////////////////////////////////////
//                                                             //
// module.audio.ogg.php                                        //
// module for analyzing Ogg Vorbis, OggFLAC and Speex files    //
// dependencies: module.audio.flac.php                         //
//                                                            ///
/////////////////////////////////////////////////////////////////

class getid3_ogg extends getid3_handler
{
	/**
	 * @link http://xiph.org/vorbis/doc/Vorbis_I_spec.html
	 *
	 * @return bool
	 */
	public function Analyze() {
		$info = &$this->getid3->info;

$info['fileformat'] = 'ogg';

// Warn about illegal tags - only vorbiscomments are allowed
		if (isset($info['id3v2'])) {
			$this->warning('Illegal ID3v2 tag present.');
		}
		if (isset($info['id3v1'])) {
			$this->warning('Illegal ID3v1 tag present.');
		}
		if (isset($info['ape'])) {
			$this->warning('Illegal APE tag present.');
		}

// Page 1 - Stream Header

$this->fseek($info['avdataoffset']);

$oggpageinfo = $this->ParseOggPageHeader();
		$info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;

if ($this->ftell() >= $this->getid3->fread_buffer_size()) {
			$this->error('Could not find start of Ogg page in the first '.$this->getid3->fread_buffer_size().' bytes (this might not be an Ogg-Vorbis file?)');
			unset($info['fileformat']);
			unset($info['ogg']);
			return false;
		}

$filedata = $this->fread($oggpageinfo['page_length']);
		$filedataoffset = 0;

if (substr($filedata, 0, 4) == 'fLaC') {

$info['audio']['dataformat']   = 'flac';
			$info['audio']['bitrate_mode'] = 'vbr';
			$info['audio']['lossless']     = true;

} elseif (substr($filedata, 1, 6) == 'vorbis') {

$this->ParseVorbisPageHeader($filedata, $filedataoffset, $oggpageinfo);

} elseif (substr($filedata, 0, 8) == 'OpusHead') {

if ($this->ParseOpusPageHeader($filedata, $filedataoffset, $oggpageinfo) === false) {
				return false;
			}

} elseif (substr($filedata, 0, 8) == 'Speex   ') {

// http://www.speex.org/manual/node10.html

$info['audio']['dataformat']   = 'speex';
			$info['mime_type']             = 'audio/speex';
			$info['audio']['bitrate_mode'] = 'abr';
			$info['audio']['lossless']     = false;

$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_string']           =                              substr($filedata, $filedataoffset, 8); // hard-coded to 'Speex   '
			$filedataoffset += 8;
			$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version']          =                              substr($filedata, $filedataoffset, 20);
			$filedataoffset += 20;
			$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version_id']       = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
			$filedataoffset += 4;
			$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['header_size']            = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
			$filedataoffset += 4;
			$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate']                   = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
			$filedataoffset += 4;
			$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode']                   = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
			$filedataoffset += 4;
			$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode_bitstream_version'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
			$filedataoffset += 4;
			$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels']            = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
			$filedataoffset += 4;
			$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['bitrate']                = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
			$filedataoffset += 4;
			$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['framesize']              = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
			$filedataoffset += 4;
			$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr']                    = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
			$filedataoffset += 4;
			$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['frames_per_packet']      = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
			$filedataoffset += 4;
			$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['extra_headers']          = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
			$filedataoffset += 4;
			$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved1']              = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
			$filedataoffset += 4;
			$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved2']              = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
			$filedataoffset += 4;

$info['speex']['speex_version'] = trim($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version']);
			$info['speex']['sample_rate']   = $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate'];
			$info['speex']['channels']      = $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels'];
			$info['speex']['vbr']           = (bool) $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr'];
			$info['speex']['band_type']     = $this->SpeexBandModeLookup($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode']);

$info['audio']['sample_rate']   = $info['speex']['sample_rate'];
			$info['audio']['channels']      = $info['speex']['channels'];
			if ($info['speex']['vbr']) {
				$info['audio']['bitrate_mode'] = 'vbr';
			}

} elseif (substr($filedata, 0, 7) == "\x80".'theora') {

// http://www.theora.org/doc/Theora.pdf (section 6.2)

$info['ogg']['pageheader']['theora']['theora_magic']             =                           substr($filedata, $filedataoffset,  7); // hard-coded to "\x80.'theora'
			$filedataoffset += 7;
			$info['ogg']['pageheader']['theora']['version_major']            = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset,  1));
			$filedataoffset += 1;
			$info['ogg']['pageheader']['theora']['version_minor']            = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset,  1));
			$filedataoffset += 1;
			$info['ogg']['pageheader']['theora']['version_revision']         = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset,  1));
			$filedataoffset += 1;
			$info['ogg']['pageheader']['theora']['frame_width_macroblocks']  = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset,  2));
			$filedataoffset += 2;
			$info['ogg']['pageheader']['theora']['frame_height_macroblocks'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset,  2));
			$filedataoffset += 2;
			$info['ogg']['pageheader']['theora']['resolution_x']             = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset,  3));
			$filedataoffset += 3;
			$info['ogg']['pageheader']['theora']['resolution_y']             = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset,  3));
			$filedataoffset += 3;
			$info['ogg']['pageheader']['theora']['picture_offset_x']         = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset,  1));
			$filedataoffset += 1;
			$info['ogg']['pageheader']['theora']['picture_offset_y']         = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset,  1));
			$filedataoffset += 1;
			$info['ogg']['pageheader']['theora']['frame_rate_numerator']     = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset,  4));
			$filedataoffset += 4;
			$info['ogg']['pageheader']['theora']['frame_rate_denominator']   = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset,  4));
			$filedataoffset += 4;
			$info['ogg']['pageheader']['theora']['pixel_aspect_numerator']   = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset,  3));
			$filedataoffset += 3;
			$info['ogg']['pageheader']['theora']['pixel_aspect_denominator'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset,  3));
			$filedataoffset += 3;
			$info['ogg']['pageheader']['theora']['color_space_id']           = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset,  1));
			$filedataoffset += 1;
			$info['ogg']['pageheader']['theora']['nominal_bitrate']          = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset,  3));
			$filedataoffset += 3;
			$info['ogg']['pageheader']['theora']['flags']                    = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset,  2));
			$filedataoffset += 2;

$info['ogg']['pageheader']['theora']['quality']         = ($info['ogg']['pageheader']['theora']['flags'] & 0xFC00) >> 10;
			$info['ogg']['pageheader']['theora']['kfg_shift']       = ($info['ogg']['pageheader']['theora']['flags'] & 0x03E0) >>  5;
			$info['ogg']['pageheader']['theora']['pixel_format_id'] = ($info['ogg']['pageheader']['theora']['flags'] & 0x0018) >>  3;
			$info['ogg']['pageheader']['theora']['reserved']        = ($info['ogg']['pageheader']['theora']['flags'] & 0x0007) >>  0; // should be 0
			$info['ogg']['pageheader']['theora']['color_space']     = self::TheoraColorSpace($info['ogg']['pageheader']['theora']['color_space_id']);
			$info['ogg']['pageheader']['theora']['pixel_format']    = self::TheoraPixelFormat($info['ogg']['pageheader']['theora']['pixel_format_id']);

$info['video']['dataformat']   = 'theora';
			$info['mime_type']             = 'video/ogg';
			//$info['audio']['bitrate_mode'] = 'abr';
			//$info['audio']['lossless']     = false;
			$info['video']['resolution_x'] = $info['ogg']['pageheader']['theora']['resolution_x'];
			$info['video']['resolution_y'] = $info['ogg']['pageheader']['theora']['resolution_y'];
			if ($info['ogg']['pageheader']['theora']['frame_rate_denominator'] > 0) {
				$info['video']['frame_rate'] = (float) $info['ogg']['pageheader']['theora']['frame_rate_numerator'] / $info['ogg']['pageheader']['theora']['frame_rate_denominator'];
			}
			if ($info['ogg']['pageheader']['theora']['pixel_aspect_denominator'] > 0) {
				$info['video']['pixel_aspect_ratio'] = (float) $info['ogg']['pageheader']['theora']['pixel_aspect_numerator'] / $info['ogg']['pageheader']['theora']['pixel_aspect_denominator'];
			}
$this->warning('Ogg Theora (v3) not fully supported in this version of getID3 ['.$this->getid3->version().'] -- bitrate, playtime and all audio data are currently unavailable');

} elseif (substr($filedata, 0, 8) == "fishead\x00") {

// Ogg Skeleton version 3.0 Format Specification
			// http://xiph.org/ogg/doc/skeleton.html
			$filedataoffset += 8;
			$info['ogg']['skeleton']['fishead']['raw']['version_major']                = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset,  2));
			$filedataoffset += 2;
			$info['ogg']['skeleton']['fishead']['raw']['version_minor']                = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset,  2));
			$filedataoffset += 2;
			$info['ogg']['skeleton']['fishead']['raw']['presentationtime_numerator']   = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset,  8));
			$filedataoffset += 8;
			$info['ogg']['skeleton']['fishead']['raw']['presentationtime_denominator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset,  8));
			$filedataoffset += 8;
			$info['ogg']['skeleton']['fishead']['raw']['basetime_numerator']           = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset,  8));
			$filedataoffset += 8;
			$info['ogg']['skeleton']['fishead']['raw']['basetime_denominator']         = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset,  8));
			$filedataoffset += 8;
			$info['ogg']['skeleton']['fishead']['raw']['utc']                          = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 20));
			$filedataoffset += 20;

$info['ogg']['skeleton']['fishead']['version']          = $info['ogg']['skeleton']['fishead']['raw']['version_major'].'.'.$info['ogg']['skeleton']['fishead']['raw']['version_minor'];
			$info['ogg']['skeleton']['fishead']['presentationtime'] = getid3_lib::SafeDiv($info['ogg']['skeleton']['fishead']['raw']['presentationtime_numerator'], $info['ogg']['skeleton']['fishead']['raw']['presentationtime_denominator']);
			$info['ogg']['skeleton']['fishead']['basetime']         = getid3_lib::SafeDiv($info['ogg']['skeleton']['fishead']['raw']['basetime_numerator'],         $info['ogg']['skeleton']['fishead']['raw']['basetime_denominator']);
			$info['ogg']['skeleton']['fishead']['utc']              = $info['ogg']['skeleton']['fishead']['raw']['utc'];

$counter = 0;
			do {
				$oggpageinfo = $this->ParseOggPageHeader();
				$info['ogg']['pageheader'][$oggpageinfo['page_seqno'].'.'.$counter++] = $oggpageinfo;
				$filedata = $this->fread($oggpageinfo['page_length']);
				$this->fseek($oggpageinfo['page_end_offset']);

if (substr($filedata, 0, 8) == "fisbone\x00") {

$filedataoffset = 8;
					$info['ogg']['skeleton']['fisbone']['raw']['message_header_offset']   = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset,  4));
					$filedataoffset += 4;
					$info['ogg']['skeleton']['fisbone']['raw']['serial_number']           = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset,  4));
					$filedataoffset += 4;
					$info['ogg']['skeleton']['fisbone']['raw']['number_header_packets']   = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset,  4));
					$filedataoffset += 4;
					$info['ogg']['skeleton']['fisbone']['raw']['granulerate_numerator']   = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset,  8));
					$filedataoffset += 8;
					$info['ogg']['skeleton']['fisbone']['raw']['granulerate_denominator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset,  8));
					$filedataoffset += 8;
					$info['ogg']['skeleton']['fisbone']['raw']['basegranule']             = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset,  8));
					$filedataoffset += 8;
					$info['ogg']['skeleton']['fisbone']['raw']['preroll']                 = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset,  4));
					$filedataoffset += 4;
					$info['ogg']['skeleton']['fisbone']['raw']['granuleshift']            = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset,  1));
					$filedataoffset += 1;
					$info['ogg']['skeleton']['fisbone']['raw']['padding']                 =                              substr($filedata, $filedataoffset,  3);
					$filedataoffset += 3;

} elseif (substr($filedata, 1, 6) == 'theora') {

$info['video']['dataformat'] = 'theora1';
					$this->error('Ogg Theora (v1) not correctly handled in this version of getID3 ['.$this->getid3->version().']');
					//break;

} elseif (substr($filedata, 1, 6) == 'vorbis') {

$this->ParseVorbisPageHeader($filedata, $filedataoffset, $oggpageinfo);

} else {
					$this->error('unexpected');
					//break;
				}
			//} while ($oggpageinfo['page_seqno'] == 0);
			} while (($oggpageinfo['page_seqno'] == 0) && (substr($filedata, 0, 8) != "fisbone\x00"));

$this->fseek($oggpageinfo['page_start_offset']);

$this->error('Ogg Skeleton not correctly handled in this version of getID3 ['.$this->getid3->version().']');
			//return false;

} elseif (substr($filedata, 0, 5) == "\x7F".'FLAC') {
			// https://xiph.org/flac/ogg_mapping.html

$info['audio']['dataformat']   = 'flac';
			$info['audio']['bitrate_mode'] = 'vbr';
			$info['audio']['lossless']     = true;

$info['ogg']['flac']['header']['version_major']  =                         ord(substr($filedata,  5, 1));
			$info['ogg']['flac']['header']['version_minor']  =                         ord(substr($filedata,  6, 1));
			$info['ogg']['flac']['header']['header_packets'] =   getid3_lib::BigEndian2Int(substr($filedata,  7, 2)) + 1; // "A two-byte, big-endian binary number signifying the number of header (non-audio) packets, not including this one. This number may be zero (0x0000) to signify 'unknown' but be aware that some decoders may not be able to handle such streams."
			$info['ogg']['flac']['header']['magic']          =                             substr($filedata,  9, 4);
			if ($info['ogg']['flac']['header']['magic'] != 'fLaC') {
				$this->error('Ogg-FLAC expecting "fLaC", found "'.$info['ogg']['flac']['header']['magic'].'" ('.trim(getid3_lib::PrintHexBytes($info['ogg']['flac']['header']['magic'])).')');
				return false;
			}
			$info['ogg']['flac']['header']['STREAMINFO_bytes'] = getid3_lib::BigEndian2Int(substr($filedata, 13, 4));
			$info['flac']['STREAMINFO'] = getid3_flac::parseSTREAMINFOdata(substr($filedata, 17, 34));
			if (!empty($info['flac']['STREAMINFO']['sample_rate'])) {
				$info['audio']['bitrate_mode']    = 'vbr';
				$info['audio']['sample_rate']     = $info['flac']['STREAMINFO']['sample_rate'];
				$info['audio']['channels']        = $info['flac']['STREAMINFO']['channels'];
				$info['audio']['bits_per_sample'] = $info['flac']['STREAMINFO']['bits_per_sample'];
				$info['playtime_seconds']         = getid3_lib::SafeDiv($info['flac']['STREAMINFO']['samples_stream'], $info['flac']['STREAMINFO']['sample_rate']);
			}

} else {

$this->error('Expecting one of "vorbis", "Speex", "OpusHead", "vorbis", "fishhead", "theora", "fLaC" identifier strings, found "'.substr($filedata, 0, 8).'"');
			unset($info['ogg']);
			unset($info['mime_type']);
			return false;

}

// Page 2 - Comment Header
		$oggpageinfo = $this->ParseOggPageHeader();
		$info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;

switch ($info['audio']['dataformat']) {
			case 'vorbis':
				$filedata = $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']);
				$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($filedata, 0, 1));
				$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] =                              substr($filedata, 1, 6); // hard-coded to 'vorbis'

$this->ParseVorbisComments();
				break;

case 'flac':
				$flac = new getid3_flac($this->getid3);
				if (!$flac->parseMETAdata()) {
					$this->error('Failed to parse FLAC headers');
					return false;
				}
				unset($flac);
				break;

case 'speex':
				$this->fseek($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length'], SEEK_CUR);
				$this->ParseVorbisComments();
				break;

case 'opus':
				$filedata = $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']);
				$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, 0, 8); // hard-coded to 'OpusTags'
				if(substr($filedata, 0, 8)  != 'OpusTags') {
					$this->error('Expected "OpusTags" as header but got "'.substr($filedata, 0, 8).'"');
					return false;
				}

$this->ParseVorbisComments();
				break;

}

// Last Page - Number of Samples
		if (!getid3_lib::intValueSupported($info['avdataend'])) {

$this->warning('Unable to parse Ogg end chunk file (PHP does not support file operations beyond '.round(PHP_INT_MAX / 1073741824).'GB)');

} else {

$this->fseek(max($info['avdataend'] - $this->getid3->fread_buffer_size(), 0));
			$LastChunkOfOgg = strrev($this->fread($this->getid3->fread_buffer_size()));
			if ($LastOggSpostion = strpos($LastChunkOfOgg, 'SggO')) {
				if (substr($LastChunkOfOgg, 13, 8) === "\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF") {
					// https://github.com/JamesHeinrich/getID3/issues/450
					// "Sometimes, Opus encoders (WhatsApp voice registrations and others) add a special last header with a granule duration of 0xFFFFFFFFFFFFFF.
					// This value indicates "this is the end," but must be ignored; otherwise, it makes calculations wrong."
					$LastOggSpostion = strpos($LastChunkOfOgg, 'SggO', $LastOggSpostion + 1);
				}
				$this->fseek($info['avdataend'] - ($LastOggSpostion + strlen('SggO')));
				$info['avdataend'] = $this->ftell();
				$info['ogg']['pageheader']['eos'] = $this->ParseOggPageHeader();
				$info['ogg']['samples']   = $info['ogg']['pageheader']['eos']['pcm_abs_position'];
				if ($info['ogg']['samples'] == 0) {
					$this->error('Corrupt Ogg file: eos.number of samples == zero');
					return false;
				}
				if (!empty($info['audio']['sample_rate'])) {
					$info['ogg']['bitrate_average'] = (($info['avdataend'] - $info['avdataoffset']) * 8) * $info['audio']['sample_rate'] / $info['ogg']['samples'];
				}
			}

}

if (!empty($info['ogg']['bitrate_average'])) {
			$info['audio']['bitrate'] = $info['ogg']['bitrate_average'];
		} elseif (!empty($info['ogg']['bitrate_nominal'])) {
			$info['audio']['bitrate'] = $info['ogg']['bitrate_nominal'];
		} elseif (!empty($info['ogg']['bitrate_min']) && !empty($info['ogg']['bitrate_max'])) {
			$info['audio']['bitrate'] = ($info['ogg']['bitrate_min'] + $info['ogg']['bitrate_max']) / 2;
		}
		if (isset($info['audio']['bitrate']) && !isset($info['playtime_seconds'])) {
			if ($info['audio']['bitrate'] == 0) {
				$this->error('Corrupt Ogg file: bitrate_audio == zero');
				return false;
			}
			$info['playtime_seconds'] = (float) ((($info['avdataend'] - $info['avdataoffset']) * 8) / $info['audio']['bitrate']);
		}

if (isset($info['ogg']['vendor'])) {
			$info['audio']['encoder'] = preg_replace('/^Encoded with /', '', $info['ogg']['vendor']);

// Vorbis only
			if ($info['audio']['dataformat'] == 'vorbis') {

// Vorbis 1.0 starts with Xiph.Org
				if  (preg_match('/^Xiph.Org/', $info['audio']['encoder'])) {

if ($info['audio']['bitrate_mode'] == 'abr') {

// Set -b 128 on abr files
						$info['audio']['encoder_options'] = '-b '.round($info['ogg']['bitrate_nominal'] / 1000);

} elseif (($info['audio']['bitrate_mode'] == 'vbr') && ($info['audio']['channels'] == 2) && ($info['audio']['sample_rate'] >= 44100) && ($info['audio']['sample_rate'] <= 48000)) {
						// Set -q N on vbr files
						$info['audio']['encoder_options'] = '-q '.$this->get_quality_from_nominal_bitrate($info['ogg']['bitrate_nominal']);

}
				}

if (empty($info['audio']['encoder_options']) && !empty($info['ogg']['bitrate_nominal'])) {
					$info['audio']['encoder_options'] = 'Nominal bitrate: '.intval(round($info['ogg']['bitrate_nominal'] / 1000)).'kbps';
				}
			}
		}

return true;
	}

/**
	 * @param string $filedata
	 * @param int    $filedataoffset
	 * @param array  $oggpageinfo
	 *
	 * @return bool
	 */
	public function ParseVorbisPageHeader(&$filedata, &$filedataoffset, &$oggpageinfo) {
		$info = &$this->getid3->info;
		$info['audio']['dataformat'] = 'vorbis';
		$info['audio']['lossless']   = false;

$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
		$filedataoffset += 1;
		$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, $filedataoffset, 6); // hard-coded to 'vorbis'
		$filedataoffset += 6;
		$info['ogg']['bitstreamversion'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
		$filedataoffset += 4;
		$info['ogg']['numberofchannels'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
		$filedataoffset += 1;
		$info['audio']['channels']       = $info['ogg']['numberofchannels'];
		$info['ogg']['samplerate']       = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
		$filedataoffset += 4;
		if ($info['ogg']['samplerate'] == 0) {
			$this->error('Corrupt Ogg file: sample rate == zero');
			return false;
		}
		$info['audio']['sample_rate']    = $info['ogg']['samplerate'];
		$info['ogg']['samples']          = 0; // filled in later
		$info['ogg']['bitrate_average']  = 0; // filled in later
		$info['ogg']['bitrate_max']      = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
		$filedataoffset += 4;
		$info['ogg']['bitrate_nominal']  = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
		$filedataoffset += 4;
		$info['ogg']['bitrate_min']      = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
		$filedataoffset += 4;
		$info['ogg']['blocksize_small']  = pow(2,  getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0x0F);
		$info['ogg']['blocksize_large']  = pow(2, (getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0xF0) >> 4);
		$info['ogg']['stop_bit']         = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); // must be 1, marks end of packet

$info['audio']['bitrate_mode'] = 'vbr'; // overridden if actually abr
		if ($info['ogg']['bitrate_max'] == 0xFFFFFFFF) {
			unset($info['ogg']['bitrate_max']);
			$info['audio']['bitrate_mode'] = 'abr';
		}
		if ($info['ogg']['bitrate_nominal'] == 0xFFFFFFFF) {
			unset($info['ogg']['bitrate_nominal']);
		}
		if ($info['ogg']['bitrate_min'] == 0xFFFFFFFF) {
			unset($info['ogg']['bitrate_min']);
			$info['audio']['bitrate_mode'] = 'abr';
		}
		return true;
	}

/**
	 * @link http://tools.ietf.org/html/draft-ietf-codec-oggopus-03
	 *
	 * @param string $filedata
	 * @param int    $filedataoffset
	 * @param array  $oggpageinfo
	 *
	 * @return bool
	 */
	public function ParseOpusPageHeader(&$filedata, &$filedataoffset, &$oggpageinfo) {
		$info = &$this->getid3->info;
		$info['audio']['dataformat']   = 'opus';
		$info['mime_type']             = 'audio/ogg; codecs=opus';

/** @todo find a usable way to detect abr (vbr that is padded to be abr) */
		$info['audio']['bitrate_mode'] = 'vbr';

$info['audio']['lossless']     = false;

$info['ogg']['pageheader']['opus']['opus_magic'] = substr($filedata, $filedataoffset, 8); // hard-coded to 'OpusHead'
		$filedataoffset += 8;
		$info['ogg']['pageheader']['opus']['version']    = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset,  1));
		$filedataoffset += 1;

if ($info['ogg']['pageheader']['opus']['version'] < 1 || $info['ogg']['pageheader']['opus']['version'] > 15) {
			$this->error('Unknown opus version number (only accepting 1-15)');
			return false;
		}

$info['ogg']['pageheader']['opus']['out_channel_count'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset,  1));
		$filedataoffset += 1;

if ($info['ogg']['pageheader']['opus']['out_channel_count'] == 0) {
			$this->error('Invalid channel count in opus header (must not be zero)');
			return false;
		}

$info['ogg']['pageheader']['opus']['pre_skip'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset,  2));
		$filedataoffset += 2;

$info['ogg']['pageheader']['opus']['input_sample_rate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset,  4));
		$filedataoffset += 4;

//$info['ogg']['pageheader']['opus']['output_gain'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset,  2));
		//$filedataoffset += 2;

//$info['ogg']['pageheader']['opus']['channel_mapping_family'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset,  1));
		//$filedataoffset += 1;

$info['opus']['opus_version']       = $info['ogg']['pageheader']['opus']['version'];
		$info['opus']['sample_rate_input']  = $info['ogg']['pageheader']['opus']['input_sample_rate'];
		$info['opus']['out_channel_count']  = $info['ogg']['pageheader']['opus']['out_channel_count'];

$info['audio']['channels']          = $info['opus']['out_channel_count'];
		$info['audio']['sample_rate_input'] = $info['opus']['sample_rate_input'];
		$info['audio']['sample_rate']       = 48000; // "All Opus audio is coded at 48 kHz, and should also be decoded at 48 kHz for playback (unless the target hardware does not support this sampling rate). However, this field may be used to resample the audio back to the original sampling rate, for example, when saving the output to a file." -- https://mf4.xiph.org/jenkins/view/opus/job/opusfile-unix/ws/doc/html/structOpusHead.html
		return true;
	}

/**
	 * @return array|false
	 */
	public function ParseOggPageHeader() {
		// http://xiph.org/ogg/vorbis/doc/framing.html
		$oggheader = array();
		$oggheader['page_start_offset'] = $this->ftell(); // where we started from in the file

$filedata = $this->fread($this->getid3->fread_buffer_size());
		$filedataoffset = 0;
		while (substr($filedata, $filedataoffset++, 4) != 'OggS') {
			if (($this->ftell() - $oggheader['page_start_offset']) >= $this->getid3->fread_buffer_size()) {
				// should be found before here
				return false;
			}
			if (($filedataoffset + 28) > strlen($filedata)) {
				if ($this->feof() || (($filedata .= $this->fread($this->getid3->fread_buffer_size())) === '')) {
					// get some more data, unless eof, in which case fail
					return false;
				}
			}
		}
		$filedataoffset += strlen('OggS') - 1; // page, delimited by 'OggS'

$oggheader['stream_structver']  = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
		$filedataoffset += 1;
		$oggheader['flags_raw']         = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
		$filedataoffset += 1;
		$oggheader['flags']['fresh']    = (bool) ($oggheader['flags_raw'] & 0x01); // fresh packet
		$oggheader['flags']['bos']      = (bool) ($oggheader['flags_raw'] & 0x02); // first page of logical bitstream (bos)
		$oggheader['flags']['eos']      = (bool) ($oggheader['flags_raw'] & 0x04); // last page of logical bitstream (eos)

$oggheader['pcm_abs_position']  = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8));
		$filedataoffset += 8;
		$oggheader['stream_serialno']   = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
		$filedataoffset += 4;
		$oggheader['page_seqno']        = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
		$filedataoffset += 4;
		$oggheader['page_checksum']     = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
		$filedataoffset += 4;
		$oggheader['page_segments']     = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
		$filedataoffset += 1;
		$oggheader['page_length'] = 0;
		for ($i = 0; $i < $oggheader['page_segments']; $i++) {
			$oggheader['segment_table'][$i] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
			$filedataoffset += 1;
			$oggheader['page_length'] += $oggheader['segment_table'][$i];
		}
		$oggheader['header_end_offset'] = $oggheader['page_start_offset'] + $filedataoffset;
		$oggheader['page_end_offset']   = $oggheader['header_end_offset'] + $oggheader['page_length'];
		$this->fseek($oggheader['header_end_offset']);

return $oggheader;
	}

/**
	 * @link http://xiph.org/vorbis/doc/Vorbis_I_spec.html#x1-810005
	 *
	 * @return bool
	 */
	public function ParseVorbisComments() {
		$info = &$this->getid3->info;

$OriginalOffset = $this->ftell();
		$commentdata = null;
		$commentdataoffset = 0;
		$VorbisCommentPage = 1;
		$CommentStartOffset = 0;

switch ($info['audio']['dataformat']) {
			case 'vorbis':
			case 'speex':
			case 'opus':
				$CommentStartOffset = $info['ogg']['pageheader'][$VorbisCommentPage]['page_start_offset'];  // Second Ogg page, after header block
				$this->fseek($CommentStartOffset);
				$commentdataoffset = 27 + $info['ogg']['pageheader'][$VorbisCommentPage]['page_segments'];
				$commentdata = $this->fread(self::OggPageSegmentLength($info['ogg']['pageheader'][$VorbisCommentPage], 1) + $commentdataoffset);

if ($info['audio']['dataformat'] == 'vorbis') {
					$commentdataoffset += (strlen('vorbis') + 1);
				}
				else if ($info['audio']['dataformat'] == 'opus') {
					$commentdataoffset += strlen('OpusTags');
				}

break;

case 'flac':
				$CommentStartOffset = $info['flac']['VORBIS_COMMENT']['raw']['offset'] + 4;
				$this->fseek($CommentStartOffset);
				$commentdata = $this->fread($info['flac']['VORBIS_COMMENT']['raw']['block_length']);
				break;

default:
				return false;
		}

$VendorSize = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));
		$commentdataoffset += 4;

$info['ogg']['vendor'] = substr($commentdata, $commentdataoffset, $VendorSize);
		$commentdataoffset += $VendorSize;

$CommentsCount = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));
		$commentdataoffset += 4;
		$info['avdataoffset'] = $CommentStartOffset + $commentdataoffset;

$basicfields = array('TITLE', 'ARTIST', 'ALBUM', 'TRACKNUMBER', 'GENRE', 'DATE', 'DESCRIPTION', 'COMMENT');
		$ThisFileInfo_ogg_comments_raw = &$info['ogg']['comments_raw'];
		for ($i = 0; $i < $CommentsCount; $i++) {

if ($i >= 10000) {
				// https://github.com/owncloud/music/issues/212#issuecomment-43082336
				$this->warning('Unexpectedly large number ('.$CommentsCount.') of Ogg comments - breaking after reading '.$i.' comments');
				break;
			}

$ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] = $CommentStartOffset + $commentdataoffset;

if ($this->ftell() < ($ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] + 4)) {
				if ($oggpageinfo = $this->ParseOggPageHeader()) {
					$info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;

$VorbisCommentPage++;

// First, save what we haven't read yet
					$AsYetUnusedData = substr($commentdata, $commentdataoffset);

// Then take that data off the end
					$commentdata     = substr($commentdata, 0, $commentdataoffset);

// Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct
					$commentdata .= str_repeat("\x00", 27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
					$commentdataoffset += (27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);

// Finally, stick the unused data back on the end
					$commentdata .= $AsYetUnusedData;

//$commentdata .= $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']);
					$commentdata .= $this->fread($this->OggPageSegmentLength($info['ogg']['pageheader'][$VorbisCommentPage], 1));
				}

}
			$ThisFileInfo_ogg_comments_raw[$i]['size'] = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));

// replace avdataoffset with position just after the last vorbiscomment
			$info['avdataoffset'] = $ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] + $ThisFileInfo_ogg_comments_raw[$i]['size'] + 4;

$commentdataoffset += 4;
			while ((strlen($commentdata) - $commentdataoffset) < $ThisFileInfo_ogg_comments_raw[$i]['size']) {
				if (($ThisFileInfo_ogg_comments_raw[$i]['size'] > $info['avdataend']) || ($ThisFileInfo_ogg_comments_raw[$i]['size'] < 0)) {
					$this->warning('Invalid Ogg comment size (comment #'.$i.', claims to be '.number_format($ThisFileInfo_ogg_comments_raw[$i]['size']).' bytes) - aborting reading comments');
					break 2;
				}

$VorbisCommentPage++;

if ($oggpageinfo = $this->ParseOggPageHeader()) {
					$info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;

// First, save what we haven't read yet
					$AsYetUnusedData = substr($commentdata, $commentdataoffset);

// Then take that data off the end
					$commentdata     = substr($commentdata, 0, $commentdataoffset);

// Finally, stick the unused data back on the end
					$commentdata .= $AsYetUnusedData;

//$commentdata .= $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']);
					if (!isset($info['ogg']['pageheader'][$VorbisCommentPage])) {
						$this->warning('undefined Vorbis Comment page "'.$VorbisCommentPage.'" at offset '.$this->ftell());
						break;
					}
					$readlength = self::OggPageSegmentLength($info['ogg']['pageheader'][$VorbisCommentPage], 1);
					if ($readlength <= 0) {
						$this->warning('invalid length Vorbis Comment page "'.$VorbisCommentPage.'" at offset '.$this->ftell());
						break;
					}
					$commentdata .= $this->fread($readlength);

//$filebaseoffset += $oggpageinfo['header_end_offset'] - $oggpageinfo['page_start_offset'];
				} else {
					$this->warning('failed to ParseOggPageHeader() at offset '.$this->ftell());
					break;
				}
			}
			$ThisFileInfo_ogg_comments_raw[$i]['offset'] = $commentdataoffset;
			$commentstring = substr($commentdata, $commentdataoffset, $ThisFileInfo_ogg_comments_raw[$i]['size']);
			$commentdataoffset += $ThisFileInfo_ogg_comments_raw[$i]['size'];

if (!$commentstring) {

// no comment?
				$this->warning('Blank Ogg comment ['.$i.']');

} elseif (strstr($commentstring, '=')) {

$commentexploded = explode('=', $commentstring, 2);
				$ThisFileInfo_ogg_comments_raw[$i]['key']   = strtoupper($commentexploded[0]);
				$ThisFileInfo_ogg_comments_raw[$i]['value'] = (isset($commentexploded[1]) ? $commentexploded[1] : '');

if ($ThisFileInfo_ogg_comments_raw[$i]['key'] == 'METADATA_BLOCK_PICTURE') {

// http://wiki.xiph.org/VorbisComment#METADATA_BLOCK_PICTURE
					// The unencoded format is that of the FLAC picture block. The fields are stored in big endian order as in FLAC, picture data is stored according to the relevant standard.
					// http://flac.sourceforge.net/format.html#metadata_block_picture
					$flac = new getid3_flac($this->getid3);
					$flac->setStringMode(base64_decode($ThisFileInfo_ogg_comments_raw[$i]['value']));
					$flac->parsePICTURE();
					$info['ogg']['comments']['picture'][] = $flac->getid3->info['flac']['PICTURE'][0];
					unset($flac);

} elseif ($ThisFileInfo_ogg_comments_raw[$i]['key'] == 'COVERART') {

$data = base64_decode($ThisFileInfo_ogg_comments_raw[$i]['value']);
					$this->notice('Found deprecated COVERART tag, it should be replaced in honor of METADATA_BLOCK_PICTURE structure');
					/** @todo use 'coverartmime' where available */
					$imageinfo = getid3_lib::GetDataImageSize($data);
					if ($imageinfo === false || !isset($imageinfo['mime'])) {
						$this->warning('COVERART vorbiscomment tag contains invalid image');
						continue;
					}

$ogg = new self($this->getid3);
					$ogg->setStringMode($data);
					$info['ogg']['comments']['picture'][] = array(
						'image_mime'   => $imageinfo['mime'],
						'datalength'   => strlen($data),
						'picturetype'  => 'cover art',
						'image_height' => $imageinfo['height'],
						'image_width'  => $imageinfo['width'],
						'data'         => $ogg->saveAttachment('coverart', 0, strlen($data), $imageinfo['mime']),
					);
					unset($ogg);

} else {

$info['ogg']['comments'][strtolower($ThisFileInfo_ogg_comments_raw[$i]['key'])][] = $ThisFileInfo_ogg_comments_raw[$i]['value'];

}

} else {

$this->warning('[known problem with CDex >= v1.40, < v1.50b7] Invalid Ogg comment name/value pair ['.$i.']: '.$commentstring);

}
			unset($ThisFileInfo_ogg_comments_raw[$i]);
		}
		unset($ThisFileInfo_ogg_comments_raw);

// Replay Gain Adjustment
		// http://privatewww.essex.ac.uk/~djmrob/replaygain/
		if (isset($info['ogg']['comments']) && is_array($info['ogg']['comments'])) {
			foreach ($info['ogg']['comments'] as $index => $commentvalue) {
				switch ($index) {
					case 'rg_audiophile':
					case 'replaygain_album_gain':
						$info['replay_gain']['album']['adjustment'] = (float) $commentvalue[0];
						unset($info['ogg']['comments'][$index]);
						break;

case 'rg_radio':
					case 'replaygain_track_gain':
						$info['replay_gain']['track']['adjustment'] = (float) $commentvalue[0];
						unset($info['ogg']['comments'][$index]);
						break;

case 'replaygain_album_peak':
						$info['replay_gain']['album']['peak'] = (float) $commentvalue[0];
						unset($info['ogg']['comments'][$index]);
						break;

case 'rg_peak':
					case 'replaygain_track_peak':
						$info['replay_gain']['track']['peak'] = (float) $commentvalue[0];
						unset($info['ogg']['comments'][$index]);
						break;

case 'replaygain_reference_loudness':
						$info['replay_gain']['reference_volume'] = (float) $commentvalue[0];
						unset($info['ogg']['comments'][$index]);
						break;

default:
						// do nothing
						break;
				}
			}
		}

$this->fseek($OriginalOffset);

return true;
	}

/**
	 * @param int $mode
	 *
	 * @return string|null
	 */
	public static function SpeexBandModeLookup($mode) {
		static $SpeexBandModeLookup = array();
		if (empty($SpeexBandModeLookup)) {
			$SpeexBandModeLookup[0] = 'narrow';
			$SpeexBandModeLookup[1] = 'wide';
			$SpeexBandModeLookup[2] = 'ultra-wide';
		}
		return (isset($SpeexBandModeLookup[$mode]) ? $SpeexBandModeLookup[$mode] : null);
	}

/**
	 * @param array $OggInfoArray
	 * @param int   $SegmentNumber
	 *
	 * @return int
	 */
	public static function OggPageSegmentLength($OggInfoArray, $SegmentNumber=1) {
		$segmentlength = 0;
		for ($i = 0; $i < $SegmentNumber; $i++) {
			$segmentlength = 0;
			foreach ($OggInfoArray['segment_table'] as $key => $value) {
				$segmentlength += $value;
				if ($value < 255) {
					break;
				}
			}
		}
		return $segmentlength;
	}

/**
	 * @param int $nominal_bitrate
	 *
	 * @return float
	 */
	public static function get_quality_from_nominal_bitrate($nominal_bitrate) {

// decrease precision
		$nominal_bitrate = $nominal_bitrate / 1000;

if ($nominal_bitrate < 128) {
			// q-1 to q4
			$qval = ($nominal_bitrate - 64) / 16;
		} elseif ($nominal_bitrate < 256) {
			// q4 to q8
			$qval = $nominal_bitrate / 32;
		} elseif ($nominal_bitrate < 320) {
			// q8 to q9
			$qval = ($nominal_bitrate + 256) / 64;
		} else {
			// q9 to q10
			$qval = ($nominal_bitrate + 1300) / 180;
		}
		//return $qval; // 5.031324
		//return intval($qval); // 5
		return round($qval, 1); // 5 or 4.9
	}

/**
	 * @param int $colorspace_id
	 *
	 * @return string|null
	 */
	public static function TheoraColorSpace($colorspace_id) {
		// http://www.theora.org/doc/Theora.pdf (table 6.3)
		static $TheoraColorSpaceLookup = array();
		if (empty($TheoraColorSpaceLookup)) {
			$TheoraColorSpaceLookup[0] = 'Undefined';
			$TheoraColorSpaceLookup[1] = 'Rec. 470M';
			$TheoraColorSpaceLookup[2] = 'Rec. 470BG';
			$TheoraColorSpaceLookup[3] = 'Reserved';
		}
		return (isset($TheoraColorSpaceLookup[$colorspace_id]) ? $TheoraColorSpaceLookup[$colorspace_id] : null);
	}

/**
	 * @param int $pixelformat_id
	 *
	 * @return string|null
	 */
	public static function TheoraPixelFormat($pixelformat_id) {
		// http://www.theora.org/doc/Theora.pdf (table 6.4)
		static $TheoraPixelFormatLookup = array();
		if (empty($TheoraPixelFormatLookup)) {
			$TheoraPixelFormatLookup[0] = '4:2:0';
			$TheoraPixelFormatLookup[1] = 'Reserved';
			$TheoraPixelFormatLookup[2] = '4:2:2';
			$TheoraPixelFormatLookup[3] = '4:4:4';
		}
		return (isset($TheoraPixelFormatLookup[$pixelformat_id]) ? $TheoraPixelFormatLookup[$pixelformat_id] : null);
	}

/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org>               //
//  available at https://github.com/JamesHeinrich/getID3       //
//            or https://www.getid3.org                        //
//            or http://getid3.sourceforge.net                 //
//  see readme.txt for more details                            //
/////////////////////////////////////////////////////////////////
//                                                             //
// module.audio-video.riff.php                                 //
// module for analyzing RIFF files                             //
// multiple formats supported by this module:                  //
//    Wave, AVI, AIFF/AIFC, (MP3,AC3)/RIFF, Wavpack v3, 8SVX   //
// dependencies: module.audio.mp3.php                          //
//               module.audio.ac3.php                          //
//               module.audio.dts.php                          //
//                                                            ///
/////////////////////////////////////////////////////////////////

/**
* @todo Parse AC-3/DTS audio inside WAVE correctly
* @todo Rewrite RIFF parser totally
*/

if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
	exit;
}
getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.mp3.php', __FILE__, true);
getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.ac3.php', __FILE__, true);
getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.dts.php', __FILE__, true);

class getid3_riff extends getid3_handler
{
	protected $container = 'riff'; // default

/**
	 * @return bool
	 *
	 * @throws getid3_exception
	 */
	public function Analyze() {
		$info = &$this->getid3->info;

// initialize these values to an empty array, otherwise they default to NULL
		// and you can't append array values to a NULL value
		$info['riff'] = array('raw'=>array());

// Shortcuts
		$thisfile_riff             = &$info['riff'];
		$thisfile_riff_raw         = &$thisfile_riff['raw'];
		$thisfile_audio            = &$info['audio'];
		$thisfile_video            = &$info['video'];
		$thisfile_audio_dataformat = &$thisfile_audio['dataformat'];
		$thisfile_riff_audio       = &$thisfile_riff['audio'];
		$thisfile_riff_video       = &$thisfile_riff['video'];
		$thisfile_riff_WAVE        = array();

$Original                 = array();
		$Original['avdataoffset'] = $info['avdataoffset'];
		$Original['avdataend']    = $info['avdataend'];

$this->fseek($info['avdataoffset']);
		$RIFFheader = $this->fread(12);
		$offset = $this->ftell();
		$RIFFtype    = substr($RIFFheader, 0, 4);
		$RIFFsize    = substr($RIFFheader, 4, 4);
		$RIFFsubtype = substr($RIFFheader, 8, 4);

if ($RIFFsize == "\x00\x00\x00\x00") {
			// https://github.com/JamesHeinrich/getID3/issues/468
			// may occur in streaming files where the data size is unknown
			$thisfile_riff['header_size'] = $info['avdataend'] - 8;
			$this->warning('RIFF size field is empty, assuming the correct value is filesize-8 ('.$thisfile_riff['header_size'].')');
		} else {
			$thisfile_riff['header_size'] = $this->EitherEndian2Int($RIFFsize);
		}

switch ($RIFFtype) {
			case 'FORM':  // AIFF, AIFC
				//$info['fileformat']   = 'aiff';
				$this->container = 'aiff';
				$thisfile_riff[$RIFFsubtype]  = $this->ParseRIFF($offset, ($offset + $thisfile_riff['header_size'] - 4));
				break;

case 'RIFF':  // AVI, WAV, etc
			case 'SDSS':  // SDSS is identical to RIFF, just renamed. Used by SmartSound QuickTracks (www.smartsound.com)
			case 'RMP3':  // RMP3 is identical to RIFF, just renamed. Used by [unknown program] when creating RIFF-MP3s
				//$info['fileformat']   = 'riff';
				$this->container = 'riff';
				if ($RIFFsubtype == 'RMP3') {
					// RMP3 is identical to WAVE, just renamed. Used by [unknown program] when creating RIFF-MP3s
					$RIFFsubtype = 'WAVE';
				}
				if ($RIFFsubtype != 'AMV ') {
					// AMV files are RIFF-AVI files with parts of the spec deliberately broken, such as chunk size fields hardcoded to zero (because players known in hardware that these fields are always a certain size
					// Handled separately in ParseRIFFAMV()
					$thisfile_riff[$RIFFsubtype]  = $this->ParseRIFF($offset, ($offset + $thisfile_riff['header_size'] - 4));
				}
				if (($info['avdataend'] - $info['filesize']) == 1) {
					// LiteWave appears to incorrectly *not* pad actual output file
					// to nearest WORD boundary so may appear to be short by one
					// byte, in which case - skip warning
					$info['avdataend'] = $info['filesize'];
				}

$nextRIFFoffset = (int) $Original['avdataoffset'] + 8 + (int) $thisfile_riff['header_size']; // 8 = "RIFF" + 32-bit offset
				while ($nextRIFFoffset < min($info['filesize'], $info['avdataend'])) {
					try {
						$this->fseek($nextRIFFoffset);
					} catch (getid3_exception $e) {
						if ($e->getCode() == 10) {
							//$this->warning('RIFF parser: '.$e->getMessage());
							$this->error('AVI extends beyond '.round(PHP_INT_MAX / 1073741824).'GB and PHP filesystem functions cannot read that far, playtime may be wrong');
							$this->warning('[avdataend] value may be incorrect, multiple AVIX chunks may be present');
							break;
						} else {
							throw $e;
						}
					}
					$nextRIFFheader = $this->fread(12);
					if ($nextRIFFoffset == ($info['avdataend'] - 1)) {
						if (substr($nextRIFFheader, 0, 1) == "\x00") {
							// RIFF padded to WORD boundary, we're actually already at the end
							break;
						}
					}
					$nextRIFFheaderID =                         substr($nextRIFFheader, 0, 4);
					$nextRIFFsize     = $this->EitherEndian2Int(substr($nextRIFFheader, 4, 4));
					$nextRIFFtype     =                         substr($nextRIFFheader, 8, 4);
					$chunkdata = array();
					$chunkdata['offset'] = $nextRIFFoffset + 8;
					$chunkdata['size']   = $nextRIFFsize;
					$nextRIFFoffset = $chunkdata['offset'] + $chunkdata['size'];

switch ($nextRIFFheaderID) {
						case 'RIFF':
							$chunkdata['chunks'] = $this->ParseRIFF($chunkdata['offset'] + 4, $nextRIFFoffset);
							if (!isset($thisfile_riff[$nextRIFFtype])) {
								$thisfile_riff[$nextRIFFtype] = array();
							}
							$thisfile_riff[$nextRIFFtype][] = $chunkdata;
							break;

case 'AMV ':
							unset($info['riff']);
							$info['amv'] = $this->ParseRIFFAMV($chunkdata['offset'] + 4, $nextRIFFoffset);
							break;

case 'JUNK':
							// ignore
							$thisfile_riff[$nextRIFFheaderID][] = $chunkdata;
							break;

case 'IDVX':
							$info['divxtag']['comments'] = self::ParseDIVXTAG($this->fread($chunkdata['size']));
							break;

default:
							if ($info['filesize'] == ($chunkdata['offset'] - 8 + 128)) {
								$DIVXTAG = $nextRIFFheader.$this->fread(128 - 12);
								if (substr($DIVXTAG, -7) == 'DIVXTAG') {
									// DIVXTAG is supposed to be inside an IDVX chunk in a LIST chunk, but some bad encoders just slap it on the end of a file
									$this->warning('Found wrongly-structured DIVXTAG at offset '.($this->ftell() - 128).', parsing anyway');
									$info['divxtag']['comments'] = self::ParseDIVXTAG($DIVXTAG);
									break 2;
								}
							}
							$this->warning('Expecting "RIFF|JUNK|IDVX" at '.$nextRIFFoffset.', found "'.$nextRIFFheaderID.'" ('.getid3_lib::PrintHexBytes($nextRIFFheaderID).') - skipping rest of file');
							break 2;

}

}
				if ($RIFFsubtype == 'WAVE') {
					$thisfile_riff_WAVE = &$thisfile_riff['WAVE'];
				}
				break;

default:
				$this->error('Cannot parse RIFF (this is maybe not a RIFF / WAV / AVI file?) - expecting "FORM|RIFF|SDSS|RMP3" found "'.$RIFFsubtype.'" instead');
				//unset($info['fileformat']);
				return false;
		}

$streamindex = 0;
		switch ($RIFFsubtype) {

// http://en.wikipedia.org/wiki/Wav
			case 'WAVE':
				$info['fileformat'] = 'wav';

if (empty($thisfile_audio['bitrate_mode'])) {
					$thisfile_audio['bitrate_mode'] = 'cbr';
				}
				if (empty($thisfile_audio_dataformat)) {
					$thisfile_audio_dataformat = 'wav';
				}

if (isset($thisfile_riff_WAVE['data'][0]['offset'])) {
					$info['avdataoffset'] = $thisfile_riff_WAVE['data'][0]['offset'] + 8;
					$info['avdataend']    = $info['avdataoffset'] + $thisfile_riff_WAVE['data'][0]['size'];
				}
				if (isset($thisfile_riff_WAVE['fmt '][0]['data'])) {

$thisfile_riff_audio[$streamindex] = self::parseWAVEFORMATex($thisfile_riff_WAVE['fmt '][0]['data']);
					$thisfile_audio['wformattag'] = $thisfile_riff_audio[$streamindex]['raw']['wFormatTag'];
					if (!isset($thisfile_riff_audio[$streamindex]['bitrate']) || ($thisfile_riff_audio[$streamindex]['bitrate'] == 0)) {
						$this->error('Corrupt RIFF file: bitrate_audio == zero');
						return false;
					}
					$thisfile_riff_raw['fmt '] = $thisfile_riff_audio[$streamindex]['raw'];
					unset($thisfile_riff_audio[$streamindex]['raw']);
					$thisfile_audio['streams'][$streamindex] = $thisfile_riff_audio[$streamindex];

$thisfile_audio = (array) getid3_lib::array_merge_noclobber($thisfile_audio, $thisfile_riff_audio[$streamindex]);
					if (substr($thisfile_audio['codec'], 0, strlen('unknown: 0x')) == 'unknown: 0x') {
						$this->warning('Audio codec = '.$thisfile_audio['codec']);
					}
					$thisfile_audio['bitrate'] = $thisfile_riff_audio[$streamindex]['bitrate'];

if (empty($info['playtime_seconds'])) { // may already be set (e.g. DTS-WAV)
						$info['playtime_seconds'] =  (float)getid3_lib::SafeDiv(($info['avdataend'] - $info['avdataoffset']) * 8, $thisfile_audio['bitrate']);
					}

$thisfile_audio['lossless'] = false;
					if (isset($thisfile_riff_WAVE['data'][0]['offset']) && isset($thisfile_riff_raw['fmt ']['wFormatTag'])) {
						switch ($thisfile_riff_raw['fmt ']['wFormatTag']) {

case 0x0001:  // PCM
								$thisfile_audio['lossless'] = true;
								break;

case 0x2000:  // AC-3
								$thisfile_audio_dataformat = 'ac3';
								break;

default:
								// do nothing
								break;

}
					}
					$thisfile_audio['streams'][$streamindex]['wformattag']   = $thisfile_audio['wformattag'];
					$thisfile_audio['streams'][$streamindex]['bitrate_mode'] = $thisfile_audio['bitrate_mode'];
					$thisfile_audio['streams'][$streamindex]['lossless']     = $thisfile_audio['lossless'];
					$thisfile_audio['streams'][$streamindex]['dataformat']   = $thisfile_audio_dataformat;
				}

if (isset($thisfile_riff_WAVE['rgad'][0]['data'])) {

// shortcuts
					$rgadData = &$thisfile_riff_WAVE['rgad'][0]['data'];
					$thisfile_riff_raw['rgad']    = array('track'=>array(), 'album'=>array());
					$thisfile_riff_raw_rgad       = &$thisfile_riff_raw['rgad'];
					$thisfile_riff_raw_rgad_track = &$thisfile_riff_raw_rgad['track'];
					$thisfile_riff_raw_rgad_album = &$thisfile_riff_raw_rgad['album'];

$thisfile_riff_raw_rgad['fPeakAmplitude']      = getid3_lib::LittleEndian2Float(substr($rgadData, 0, 4));
					$thisfile_riff_raw_rgad['nRadioRgAdjust']      =        $this->EitherEndian2Int(substr($rgadData, 4, 2));
					$thisfile_riff_raw_rgad['nAudiophileRgAdjust'] =        $this->EitherEndian2Int(substr($rgadData, 6, 2));

$nRadioRgAdjustBitstring      = str_pad(getid3_lib::Dec2Bin($thisfile_riff_raw_rgad['nRadioRgAdjust']), 16, '0', STR_PAD_LEFT);
					$nAudiophileRgAdjustBitstring = str_pad(getid3_lib::Dec2Bin($thisfile_riff_raw_rgad['nAudiophileRgAdjust']), 16, '0', STR_PAD_LEFT);
					$thisfile_riff_raw_rgad_track['name']       = getid3_lib::Bin2Dec(substr($nRadioRgAdjustBitstring, 0, 3));
					$thisfile_riff_raw_rgad_track['originator'] = getid3_lib::Bin2Dec(substr($nRadioRgAdjustBitstring, 3, 3));
					$thisfile_riff_raw_rgad_track['signbit']    = getid3_lib::Bin2Dec(substr($nRadioRgAdjustBitstring, 6, 1));
					$thisfile_riff_raw_rgad_track['adjustment'] = getid3_lib::Bin2Dec(substr($nRadioRgAdjustBitstring, 7, 9));
					$thisfile_riff_raw_rgad_album['name']       = getid3_lib::Bin2Dec(substr($nAudiophileRgAdjustBitstring, 0, 3));
					$thisfile_riff_raw_rgad_album['originator'] = getid3_lib::Bin2Dec(substr($nAudiophileRgAdjustBitstring, 3, 3));
					$thisfile_riff_raw_rgad_album['signbit']    = getid3_lib::Bin2Dec(substr($nAudiophileRgAdjustBitstring, 6, 1));
					$thisfile_riff_raw_rgad_album['adjustment'] = getid3_lib::Bin2Dec(substr($nAudiophileRgAdjustBitstring, 7, 9));

$thisfile_riff['rgad']['peakamplitude'] = $thisfile_riff_raw_rgad['fPeakAmplitude'];
					if (($thisfile_riff_raw_rgad_track['name'] != 0) && ($thisfile_riff_raw_rgad_track['originator'] != 0)) {
						$thisfile_riff['rgad']['track']['name']            = getid3_lib::RGADnameLookup($thisfile_riff_raw_rgad_track['name']);
						$thisfile_riff['rgad']['track']['originator']      = getid3_lib::RGADoriginatorLookup($thisfile_riff_raw_rgad_track['originator']);
						$thisfile_riff['rgad']['track']['adjustment']      = getid3_lib::RGADadjustmentLookup($thisfile_riff_raw_rgad_track['adjustment'], $thisfile_riff_raw_rgad_track['signbit']);
					}
					if (($thisfile_riff_raw_rgad_album['name'] != 0) && ($thisfile_riff_raw_rgad_album['originator'] != 0)) {
						$thisfile_riff['rgad']['album']['name']       = getid3_lib::RGADnameLookup($thisfile_riff_raw_rgad_album['name']);
						$thisfile_riff['rgad']['album']['originator'] = getid3_lib::RGADoriginatorLookup($thisfile_riff_raw_rgad_album['originator']);
						$thisfile_riff['rgad']['album']['adjustment'] = getid3_lib::RGADadjustmentLookup($thisfile_riff_raw_rgad_album['adjustment'], $thisfile_riff_raw_rgad_album['signbit']);
					}
				}

if (isset($thisfile_riff_WAVE['fact'][0]['data'])) {
					$thisfile_riff_raw['fact']['NumberOfSamples'] = $this->EitherEndian2Int(substr($thisfile_riff_WAVE['fact'][0]['data'], 0, 4));

// This should be a good way of calculating exact playtime,
					// but some sample files have had incorrect number of samples,
					// so cannot use this method

// if (!empty($thisfile_riff_raw['fmt ']['nSamplesPerSec'])) {
					//     $info['playtime_seconds'] = (float) $thisfile_riff_raw['fact']['NumberOfSamples'] / $thisfile_riff_raw['fmt ']['nSamplesPerSec'];
					// }
				}
				if (!empty($thisfile_riff_raw['fmt ']['nAvgBytesPerSec'])) {
					$thisfile_audio['bitrate'] = getid3_lib::CastAsInt($thisfile_riff_raw['fmt ']['nAvgBytesPerSec'] * 8);
				}

if (isset($thisfile_riff_WAVE['bext'][0]['data'])) {
					// shortcut
					$thisfile_riff_WAVE_bext_0 = &$thisfile_riff_WAVE['bext'][0];

$thisfile_riff_WAVE_bext_0['title']          =                              substr($thisfile_riff_WAVE_bext_0['data'],   0, 256);
					$thisfile_riff_WAVE_bext_0['author']         =                              substr($thisfile_riff_WAVE_bext_0['data'], 256,  32);
					$thisfile_riff_WAVE_bext_0['reference']      =                              substr($thisfile_riff_WAVE_bext_0['data'], 288,  32);
					foreach (array('title','author','reference') as $bext_key) {
						// Some software (notably Logic Pro) may not blank existing data before writing a null-terminated string to the offsets
						// assigned for text fields, resulting in a null-terminated string (or possibly just a single null) followed by garbage
						// Keep only string as far as first null byte, discard rest of fixed-width data
						// https://github.com/JamesHeinrich/getID3/issues/263
						// https://github.com/JamesHeinrich/getID3/issues/430
						$null_terminator_rows = explode("\x00", $thisfile_riff_WAVE_bext_0[$bext_key]);
						$thisfile_riff_WAVE_bext_0[$bext_key] = $null_terminator_rows[0];
					}

$thisfile_riff_WAVE_bext_0['origin_date']    =                              substr($thisfile_riff_WAVE_bext_0['data'], 320,  10);
					$thisfile_riff_WAVE_bext_0['origin_time']    =                              substr($thisfile_riff_WAVE_bext_0['data'], 330,   8);
					$thisfile_riff_WAVE_bext_0['time_reference'] = getid3_lib::LittleEndian2Int(substr($thisfile_riff_WAVE_bext_0['data'], 338,   8));
					$thisfile_riff_WAVE_bext_0['bwf_version']    = getid3_lib::LittleEndian2Int(substr($thisfile_riff_WAVE_bext_0['data'], 346,   1));
					$thisfile_riff_WAVE_bext_0['reserved']       =                              substr($thisfile_riff_WAVE_bext_0['data'], 347, 254);
					$thisfile_riff_WAVE_bext_0['coding_history'] =         explode("\r\n", trim(substr($thisfile_riff_WAVE_bext_0['data'], 601)));
					if (preg_match('#^([0-9]{4}).([0-9]{2}).([0-9]{2})$#', $thisfile_riff_WAVE_bext_0['origin_date'], $matches_bext_date)) {
						if (preg_match('#^([0-9]{2}).([0-9]{2}).([0-9]{2})$#', $thisfile_riff_WAVE_bext_0['origin_time'], $matches_bext_time)) {
							$bext_timestamp = array();
							list($dummy, $bext_timestamp['year'], $bext_timestamp['month'],  $bext_timestamp['day'])    = $matches_bext_date;
							list($dummy, $bext_timestamp['hour'], $bext_timestamp['minute'], $bext_timestamp['second']) = $matches_bext_time;
							$thisfile_riff_WAVE_bext_0['origin_date_unix'] = gmmktime($bext_timestamp['hour'], $bext_timestamp['minute'], $bext_timestamp['second'], $bext_timestamp['month'], $bext_timestamp['day'], $bext_timestamp['year']);
						} else {
							$this->warning('RIFF.WAVE.BEXT.origin_time is invalid');
						}
					} else {
						$this->warning('RIFF.WAVE.BEXT.origin_date is invalid');
					}
					$thisfile_riff['comments']['author'][] = $thisfile_riff_WAVE_bext_0['author'];
					$thisfile_riff['comments']['title'][]  = $thisfile_riff_WAVE_bext_0['title'];
				}

if (isset($thisfile_riff_WAVE['MEXT'][0]['data'])) {
					// shortcut
					$thisfile_riff_WAVE_MEXT_0 = &$thisfile_riff_WAVE['MEXT'][0];

$thisfile_riff_WAVE_MEXT_0['raw']['sound_information']      = getid3_lib::LittleEndian2Int(substr($thisfile_riff_WAVE_MEXT_0['data'], 0, 2));
					$thisfile_riff_WAVE_MEXT_0['flags']['homogenous']           = (bool) ($thisfile_riff_WAVE_MEXT_0['raw']['sound_information'] & 0x0001);
					if ($thisfile_riff_WAVE_MEXT_0['flags']['homogenous']) {
						$thisfile_riff_WAVE_MEXT_0['flags']['padding']          = ($thisfile_riff_WAVE_MEXT_0['raw']['sound_information'] & 0x0002) ? false : true;
						$thisfile_riff_WAVE_MEXT_0['flags']['22_or_44']         =        (bool) ($thisfile_riff_WAVE_MEXT_0['raw']['sound_information'] & 0x0004);
						$thisfile_riff_WAVE_MEXT_0['flags']['free_format']      =        (bool) ($thisfile_riff_WAVE_MEXT_0['raw']['sound_information'] & 0x0008);

$thisfile_riff_WAVE_MEXT_0['nominal_frame_size']        = getid3_lib::LittleEndian2Int(substr($thisfile_riff_WAVE_MEXT_0['data'], 2, 2));
					}
					$thisfile_riff_WAVE_MEXT_0['anciliary_data_length']         = getid3_lib::LittleEndian2Int(substr($thisfile_riff_WAVE_MEXT_0['data'], 6, 2));
					$thisfile_riff_WAVE_MEXT_0['raw']['anciliary_data_def']     = getid3_lib::LittleEndian2Int(substr($thisfile_riff_WAVE_MEXT_0['data'], 8, 2));
					$thisfile_riff_WAVE_MEXT_0['flags']['anciliary_data_left']  = (bool) ($thisfile_riff_WAVE_MEXT_0['raw']['anciliary_data_def'] & 0x0001);
					$thisfile_riff_WAVE_MEXT_0['flags']['anciliary_data_free']  = (bool) ($thisfile_riff_WAVE_MEXT_0['raw']['anciliary_data_def'] & 0x0002);
					$thisfile_riff_WAVE_MEXT_0['flags']['anciliary_data_right'] = (bool) ($thisfile_riff_WAVE_MEXT_0['raw']['anciliary_data_def'] & 0x0004);
				}

if (isset($thisfile_riff_WAVE['cart'][0]['data'])) {
					// shortcut
					$thisfile_riff_WAVE_cart_0 = &$thisfile_riff_WAVE['cart'][0];

$thisfile_riff_WAVE_cart_0['version']              =                              substr($thisfile_riff_WAVE_cart_0['data'],   0,  4);
					$thisfile_riff_WAVE_cart_0['title']                =                         trim(substr($thisfile_riff_WAVE_cart_0['data'],   4, 64));
					$thisfile_riff_WAVE_cart_0['artist']               =                         trim(substr($thisfile_riff_WAVE_cart_0['data'],  68, 64));
					$thisfile_riff_WAVE_cart_0['cut_id']               =                         trim(substr($thisfile_riff_WAVE_cart_0['data'], 132, 64));
					$thisfile_riff_WAVE_cart_0['client_id']            =                         trim(substr($thisfile_riff_WAVE_cart_0['data'], 196, 64));
					$thisfile_riff_WAVE_cart_0['category']             =                         trim(substr($thisfile_riff_WAVE_cart_0['data'], 260, 64));
					$thisfile_riff_WAVE_cart_0['classification']       =                         trim(substr($thisfile_riff_WAVE_cart_0['data'], 324, 64));
					$thisfile_riff_WAVE_cart_0['out_cue']              =                         trim(substr($thisfile_riff_WAVE_cart_0['data'], 388, 64));
					$thisfile_riff_WAVE_cart_0['start_date']           =                         trim(substr($thisfile_riff_WAVE_cart_0['data'], 452, 10));
					$thisfile_riff_WAVE_cart_0['start_time']           =                         trim(substr($thisfile_riff_WAVE_cart_0['data'], 462,  8));
					$thisfile_riff_WAVE_cart_0['end_date']             =                         trim(substr($thisfile_riff_WAVE_cart_0['data'], 470, 10));
					$thisfile_riff_WAVE_cart_0['end_time']             =                         trim(substr($thisfile_riff_WAVE_cart_0['data'], 480,  8));
					$thisfile_riff_WAVE_cart_0['producer_app_id']      =                         trim(substr($thisfile_riff_WAVE_cart_0['data'], 488, 64));
					$thisfile_riff_WAVE_cart_0['producer_app_version'] =                         trim(substr($thisfile_riff_WAVE_cart_0['data'], 552, 64));
					$thisfile_riff_WAVE_cart_0['user_defined_text']    =                         trim(substr($thisfile_riff_WAVE_cart_0['data'], 616, 64));
					$thisfile_riff_WAVE_cart_0['zero_db_reference']    = getid3_lib::LittleEndian2Int(substr($thisfile_riff_WAVE_cart_0['data'], 680,  4), true);
					for ($i = 0; $i < 8; $i++) {
						$thisfile_riff_WAVE_cart_0['post_time'][$i]['usage_fourcc'] =                  substr($thisfile_riff_WAVE_cart_0['data'], 684 + ($i * 8), 4);
						$thisfile_riff_WAVE_cart_0['post_time'][$i]['timer_value']  = getid3_lib::LittleEndian2Int(substr($thisfile_riff_WAVE_cart_0['data'], 684 + ($i * 8) + 4, 4));
					}
					$thisfile_riff_WAVE_cart_0['url']              =                 trim(substr($thisfile_riff_WAVE_cart_0['data'],  748, 1024));
					$thisfile_riff_WAVE_cart_0['tag_text']         = explode("\r\n", trim(substr($thisfile_riff_WAVE_cart_0['data'], 1772)));
					$thisfile_riff['comments']['tag_text'][]       =                      substr($thisfile_riff_WAVE_cart_0['data'], 1772);

$thisfile_riff['comments']['artist'][] = $thisfile_riff_WAVE_cart_0['artist'];
					$thisfile_riff['comments']['title'][]  = $thisfile_riff_WAVE_cart_0['title'];
				}

if (isset($thisfile_riff_WAVE['SNDM'][0]['data'])) {
					// SoundMiner metadata

// shortcuts
					$thisfile_riff_WAVE_SNDM_0      = &$thisfile_riff_WAVE['SNDM'][0];
					$thisfile_riff_WAVE_SNDM_0_data = &$thisfile_riff_WAVE_SNDM_0['data'];
					$SNDM_startoffset = 0;
					$SNDM_endoffset   = $thisfile_riff_WAVE_SNDM_0['size'];

while ($SNDM_startoffset < $SNDM_endoffset) {
						$SNDM_thisTagOffset = 0;
						$SNDM_thisTagSize      = getid3_lib::BigEndian2Int(substr($thisfile_riff_WAVE_SNDM_0_data, $SNDM_startoffset + $SNDM_thisTagOffset, 4));
						$SNDM_thisTagOffset += 4;
						$SNDM_thisTagKey       =                           substr($thisfile_riff_WAVE_SNDM_0_data, $SNDM_startoffset + $SNDM_thisTagOffset, 4);
						$SNDM_thisTagOffset += 4;
						$SNDM_thisTagDataSize  = getid3_lib::BigEndian2Int(substr($thisfile_riff_WAVE_SNDM_0_data, $SNDM_startoffset + $SNDM_thisTagOffset, 2));
						$SNDM_thisTagOffset += 2;
						$SNDM_thisTagDataFlags = getid3_lib::BigEndian2Int(substr($thisfile_riff_WAVE_SNDM_0_data, $SNDM_startoffset + $SNDM_thisTagOffset, 2));
						$SNDM_thisTagOffset += 2;
						$SNDM_thisTagDataText =                            substr($thisfile_riff_WAVE_SNDM_0_data, $SNDM_startoffset + $SNDM_thisTagOffset, $SNDM_thisTagDataSize);
						$SNDM_thisTagOffset += $SNDM_thisTagDataSize;

if ($SNDM_thisTagSize != (4 + 4 + 2 + 2 + $SNDM_thisTagDataSize)) {
							$this->warning('RIFF.WAVE.SNDM.data contains tag not expected length (expected: '.$SNDM_thisTagSize.', found: '.(4 + 4 + 2 + 2 + $SNDM_thisTagDataSize).') at offset '.$SNDM_startoffset.' (file offset '.($thisfile_riff_WAVE_SNDM_0['offset'] + $SNDM_startoffset).')');
							break;
						} elseif ($SNDM_thisTagSize <= 0) {
							$this->warning('RIFF.WAVE.SNDM.data contains zero-size tag at offset '.$SNDM_startoffset.' (file offset '.($thisfile_riff_WAVE_SNDM_0['offset'] + $SNDM_startoffset).')');
							break;
						}
						$SNDM_startoffset += $SNDM_thisTagSize;

$thisfile_riff_WAVE_SNDM_0['parsed_raw'][$SNDM_thisTagKey] = $SNDM_thisTagDataText;
						if ($parsedkey = self::waveSNDMtagLookup($SNDM_thisTagKey)) {
							$thisfile_riff_WAVE_SNDM_0['parsed'][$parsedkey] = $SNDM_thisTagDataText;
						} else {
							$this->warning('RIFF.WAVE.SNDM contains unknown tag "'.$SNDM_thisTagKey.'" at offset '.$SNDM_startoffset.' (file offset '.($thisfile_riff_WAVE_SNDM_0['offset'] + $SNDM_startoffset).')');
						}
					}

$tagmapping = array(
						'tracktitle'=>'title',
						'category'  =>'genre',
						'cdtitle'   =>'album',
					);
					foreach ($tagmapping as $fromkey => $tokey) {
						if (isset($thisfile_riff_WAVE_SNDM_0['parsed'][$fromkey])) {
							$thisfile_riff['comments'][$tokey][] = $thisfile_riff_WAVE_SNDM_0['parsed'][$fromkey];
						}
					}
				}

if (isset($thisfile_riff_WAVE['iXML'][0]['data'])) {
					// requires functions simplexml_load_string and get_object_vars
					if ($parsedXML = getid3_lib::XML2array($thisfile_riff_WAVE['iXML'][0]['data'])) {
						$thisfile_riff_WAVE['iXML'][0]['parsed'] = $parsedXML;
						if (isset($parsedXML['SPEED']['MASTER_SPEED'])) {
							@list($numerator, $denominator) = explode('/', $parsedXML['SPEED']['MASTER_SPEED']);
							$thisfile_riff_WAVE['iXML'][0]['master_speed'] = (int) $numerator / ($denominator ? $denominator : 1000);
						}
						if (isset($parsedXML['SPEED']['TIMECODE_RATE'])) {
							@list($numerator, $denominator) = explode('/', $parsedXML['SPEED']['TIMECODE_RATE']);
							$thisfile_riff_WAVE['iXML'][0]['timecode_rate'] = (int) $numerator / ($denominator ? $denominator : 1000);
						}
						if (isset($parsedXML['SPEED']['TIMESTAMP_SAMPLES_SINCE_MIDNIGHT_LO']) && !empty($parsedXML['SPEED']['TIMESTAMP_SAMPLE_RATE']) && !empty($thisfile_riff_WAVE['iXML'][0]['timecode_rate'])) {
							$samples_since_midnight = floatval(ltrim($parsedXML['SPEED']['TIMESTAMP_SAMPLES_SINCE_MIDNIGHT_HI'].$parsedXML['SPEED']['TIMESTAMP_SAMPLES_SINCE_MIDNIGHT_LO'], '0'));
							$timestamp_sample_rate = (is_array($parsedXML['SPEED']['TIMESTAMP_SAMPLE_RATE']) ? max($parsedXML['SPEED']['TIMESTAMP_SAMPLE_RATE']) : $parsedXML['SPEED']['TIMESTAMP_SAMPLE_RATE']); // XML could possibly contain more than one TIMESTAMP_SAMPLE_RATE tag, returning as array instead of integer [why? does it make sense? perhaps doesn't matter but getID3 needs to deal with it] - see https://github.com/JamesHeinrich/getID3/issues/105
							$thisfile_riff_WAVE['iXML'][0]['timecode_seconds'] = $samples_since_midnight / $timestamp_sample_rate;
							$h = floor( $thisfile_riff_WAVE['iXML'][0]['timecode_seconds']       / 3600);
							$m = floor(($thisfile_riff_WAVE['iXML'][0]['timecode_seconds'] - ($h * 3600))      / 60);
							$s = floor( $thisfile_riff_WAVE['iXML'][0]['timecode_seconds'] - ($h * 3600) - ($m * 60));
							$f =       ($thisfile_riff_WAVE['iXML'][0]['timecode_seconds'] - ($h * 3600) - ($m * 60) - $s) * $thisfile_riff_WAVE['iXML'][0]['timecode_rate'];
							$thisfile_riff_WAVE['iXML'][0]['timecode_string']       = sprintf('%02d:%02d:%02d:%05.2f', $h, $m, $s,       $f);
							$thisfile_riff_WAVE['iXML'][0]['timecode_string_round'] = sprintf('%02d:%02d:%02d:%02d',   $h, $m, $s, round($f));
							unset($samples_since_midnight, $timestamp_sample_rate, $h, $m, $s, $f);
						}
						unset($parsedXML);
					}
				}

if (isset($thisfile_riff_WAVE['guan'][0]['data'])) {
					// shortcut
					$thisfile_riff_WAVE_guan_0 = &$thisfile_riff_WAVE['guan'][0];
					if (!empty($thisfile_riff_WAVE_guan_0['data']) && (substr($thisfile_riff_WAVE_guan_0['data'], 0, 14) == 'GUANO|Version:')) {
						$thisfile_riff['guano'] = array();
						foreach (explode("\n", $thisfile_riff_WAVE_guan_0['data']) as $line) {
							if ($line) {
								@list($key, $value) = explode(':', $line, 2);
								if (substr($value, 0, 3) == '[{"') {
									if ($decoded = @json_decode($value, true)) {
										if (count($decoded) === 1) {
											$value = $decoded[0];
										} else {
											$value = $decoded;
										}
									}
								}
								$thisfile_riff['guano'] = array_merge_recursive($thisfile_riff['guano'], getid3_lib::CreateDeepArray($key, '|', $value));
							}
						}

// https://www.wildlifeacoustics.com/SCHEMA/GUANO.html
						foreach ($thisfile_riff['guano'] as $key => $value) {
							switch ($key) {
								case 'Loc Position':
									if (preg_match('#^([\\+\\-]?[0-9]+\\.[0-9]+) ([\\+\\-]?[0-9]+\\.[0-9]+)$#', $value, $matches)) {
										list($dummy, $latitude, $longitude) = $matches;
										$thisfile_riff['comments']['gps_latitude'][0]  = floatval($latitude);
										$thisfile_riff['comments']['gps_longitude'][0] = floatval($longitude);
										$thisfile_riff['guano'][$key] = floatval($latitude).' '.floatval($longitude);
									}
									break;
								case 'Loc Elevation': // Elevation/altitude above mean sea level in meters
									$thisfile_riff['comments']['gps_altitude'][0] = floatval($value);
									$thisfile_riff['guano'][$key] = (float) $value;
									break;
								case 'Filter HP':        // High-pass filter frequency in kHz
								case 'Filter LP':        // Low-pass filter frequency in kHz
								case 'Humidity':         // Relative humidity as a percentage
								case 'Length':           // Recording length in seconds
								case 'Loc Accuracy':     // Estimated Position Error in meters
								case 'Temperature Ext':  // External temperature in degrees Celsius outside the recorder's housing
								case 'Temperature Int':  // Internal temperature in degrees Celsius inside the recorder's housing
									$thisfile_riff['guano'][$key] = (float) $value;
									break;
								case 'Samplerate':       // Recording sample rate, Hz
								case 'TE':               // Time-expansion factor. If not specified, then 1 (no time-expansion a.k.a. direct-recording) is assumed.
									$thisfile_riff['guano'][$key] = (int) $value;
									break;
							}
						}

} else {
						$this->warning('RIFF.guan data not in expected format');
					}
				}

if (!isset($thisfile_audio['bitrate']) && isset($thisfile_riff_audio[$streamindex]['bitrate'])) {
					$thisfile_audio['bitrate'] = $thisfile_riff_audio[$streamindex]['bitrate'];
					$info['playtime_seconds'] = (float)getid3_lib::SafeDiv((($info['avdataend'] - $info['avdataoffset']) * 8), $thisfile_audio['bitrate']);
				}

if (!empty($info['wavpack'])) {
					$thisfile_audio_dataformat = 'wavpack';
					$thisfile_audio['bitrate_mode'] = 'vbr';
					$thisfile_audio['encoder']      = 'WavPack v'.$info['wavpack']['version'];

// Reset to the way it was - RIFF parsing will have messed this up
					$info['avdataend']        = $Original['avdataend'];
					$thisfile_audio['bitrate'] = getid3_lib::SafeDiv(($info['avdataend'] - $info['avdataoffset']) * 8, $info['playtime_seconds']);

$this->fseek($info['avdataoffset'] - 44);
					$RIFFdata = $this->fread(44);
					$OrignalRIFFheaderSize = getid3_lib::LittleEndian2Int(substr($RIFFdata,  4, 4)) +  8;
					$OrignalRIFFdataSize   = getid3_lib::LittleEndian2Int(substr($RIFFdata, 40, 4)) + 44;

if ($OrignalRIFFheaderSize > $OrignalRIFFdataSize) {
						$info['avdataend'] -= ($OrignalRIFFheaderSize - $OrignalRIFFdataSize);
						$this->fseek($info['avdataend']);
						$RIFFdata .= $this->fread($OrignalRIFFheaderSize - $OrignalRIFFdataSize);
					}

// move the data chunk after all other chunks (if any)
					// so that the RIFF parser doesn't see EOF when trying
					// to skip over the data chunk
					$RIFFdata = substr($RIFFdata, 0, 36).substr($RIFFdata, 44).substr($RIFFdata, 36, 8);
					$getid3_riff = new getid3_riff($this->getid3);
					$getid3_riff->ParseRIFFdata($RIFFdata);
					unset($getid3_riff);
				}

if (isset($thisfile_riff_raw['fmt ']['wFormatTag'])) {
					switch ($thisfile_riff_raw['fmt ']['wFormatTag']) {
						case 0x0001: // PCM
							if (!empty($info['ac3'])) {
								// Dolby Digital WAV files masquerade as PCM-WAV, but they're not
								$thisfile_audio['wformattag']  = 0x2000;
								$thisfile_audio['codec']       = self::wFormatTagLookup($thisfile_audio['wformattag']);
								$thisfile_audio['lossless']    = false;
								$thisfile_audio['bitrate']     = $info['ac3']['bitrate'];
								$thisfile_audio['sample_rate'] = $info['ac3']['sample_rate'];
							}
							if (!empty($info['dts'])) {
								// Dolby DTS files masquerade as PCM-WAV, but they're not
								$thisfile_audio['wformattag']  = 0x2001;
								$thisfile_audio['codec']       = self::wFormatTagLookup($thisfile_audio['wformattag']);
								$thisfile_audio['lossless']    = false;
								$thisfile_audio['bitrate']     = $info['dts']['bitrate'];
								$thisfile_audio['sample_rate'] = $info['dts']['sample_rate'];
							}
							break;
						case 0x08AE: // ClearJump LiteWave
							$thisfile_audio['bitrate_mode'] = 'vbr';
							$thisfile_audio_dataformat   = 'litewave';

//typedef struct tagSLwFormat {
							//  WORD    m_wCompFormat;     // low byte defines compression method, high byte is compression flags
							//  DWORD   m_dwScale;         // scale factor for lossy compression
							//  DWORD   m_dwBlockSize;     // number of samples in encoded blocks
							//  WORD    m_wQuality;        // alias for the scale factor
							//  WORD    m_wMarkDistance;   // distance between marks in bytes
							//  WORD    m_wReserved;
							//
							//  //following paramters are ignored if CF_FILESRC is not set
							//  DWORD   m_dwOrgSize;       // original file size in bytes
							//  WORD    m_bFactExists;     // indicates if 'fact' chunk exists in the original file
							//  DWORD   m_dwRiffChunkSize; // riff chunk size in the original file
							//
							//  PCMWAVEFORMAT m_OrgWf;     // original wave format
							// }SLwFormat, *PSLwFormat;

// shortcut
							$thisfile_riff['litewave']['raw'] = array();
							$riff_litewave     = &$thisfile_riff['litewave'];
							$riff_litewave_raw = &$riff_litewave['raw'];

$flags = array(
								'compression_method' => 1,
								'compression_flags'  => 1,
								'm_dwScale'          => 4,
								'm_dwBlockSize'      => 4,
								'm_wQuality'         => 2,
								'm_wMarkDistance'    => 2,
								'm_wReserved'        => 2,
								'm_dwOrgSize'        => 4,
								'm_bFactExists'      => 2,
								'm_dwRiffChunkSize'  => 4,
							);
							$litewave_offset = 18;
							foreach ($flags as $flag => $length) {
								$riff_litewave_raw[$flag] = getid3_lib::LittleEndian2Int(substr($thisfile_riff_WAVE['fmt '][0]['data'], $litewave_offset, $length));
								$litewave_offset += $length;
							}

//$riff_litewave['quality_factor'] = intval(round((2000 - $riff_litewave_raw['m_dwScale']) / 20));
							$riff_litewave['quality_factor'] = $riff_litewave_raw['m_wQuality'];

$riff_litewave['flags']['raw_source']    = ($riff_litewave_raw['compression_flags'] & 0x01) ? false : true;
							$riff_litewave['flags']['vbr_blocksize'] = ($riff_litewave_raw['compression_flags'] & 0x02) ? false : true;
							$riff_litewave['flags']['seekpoints']    =        (bool) ($riff_litewave_raw['compression_flags'] & 0x04);

$thisfile_audio['lossless']        = (($riff_litewave_raw['m_wQuality'] == 100) ? true : false);
							$thisfile_audio['encoder_options'] = '-q'.$riff_litewave['quality_factor'];
							break;

default:
							break;
					}
				}
				if ($info['avdataend'] > $info['filesize']) {
					switch ($thisfile_audio_dataformat) {
						case 'wavpack': // WavPack
						case 'lpac':    // LPAC
						case 'ofr':     // OptimFROG
						case 'ofs':     // OptimFROG DualStream
							// lossless compressed audio formats that keep original RIFF headers - skip warning
							break;

case 'litewave':
							if (($info['avdataend'] - $info['filesize']) == 1) {
								// LiteWave appears to incorrectly *not* pad actual output file
								// to nearest WORD boundary so may appear to be short by one
								// byte, in which case - skip warning
							} else {
								// Short by more than one byte, throw warning
								$this->warning('Probably truncated file - expecting '.$thisfile_riff[$RIFFsubtype]['data'][0]['size'].' bytes of data, only found '.($info['filesize'] - $info['avdataoffset']).' (short by '.($thisfile_riff[$RIFFsubtype]['data'][0]['size'] - ($info['filesize'] - $info['avdataoffset'])).' bytes)');
								$info['avdataend'] = $info['filesize'];
							}
							break;

default:
							if ((($info['avdataend'] - $info['filesize']) == 1) && (($thisfile_riff[$RIFFsubtype]['data'][0]['size'] % 2) == 0) && ((($info['filesize'] - $info['avdataoffset']) % 2) == 1)) {
								// output file appears to be incorrectly *not* padded to nearest WORD boundary
								// Output less severe warning
								$this->warning('File should probably be padded to nearest WORD boundary, but it is not (expecting '.$thisfile_riff[$RIFFsubtype]['data'][0]['size'].' bytes of data, only found '.($info['filesize'] - $info['avdataoffset']).' therefore short by '.($thisfile_riff[$RIFFsubtype]['data'][0]['size'] - ($info['filesize'] - $info['avdataoffset'])).' bytes)');
								$info['avdataend'] = $info['filesize'];
							} else {
								// Short by more than one byte, throw warning
								$this->warning('Probably truncated file - expecting '.$thisfile_riff[$RIFFsubtype]['data'][0]['size'].' bytes of data, only found '.($info['filesize'] - $info['avdataoffset']).' (short by '.($thisfile_riff[$RIFFsubtype]['data'][0]['size'] - ($info['filesize'] - $info['avdataoffset'])).' bytes)');
								$info['avdataend'] = $info['filesize'];
							}
							break;
					}
				}
				if (!empty($info['mpeg']['audio']['LAME']['audio_bytes'])) {
					if ((($info['avdataend'] - $info['avdataoffset']) - $info['mpeg']['audio']['LAME']['audio_bytes']) == 1) {
						$info['avdataend']--;
						$this->warning('Extra null byte at end of MP3 data assumed to be RIFF padding and therefore ignored');
					}
				}
				if ($thisfile_audio_dataformat == 'ac3') {
					unset($thisfile_audio['bits_per_sample']);
					if (!empty($info['ac3']['bitrate']) && ($info['ac3']['bitrate'] != $thisfile_audio['bitrate'])) {
						$thisfile_audio['bitrate'] = $info['ac3']['bitrate'];
					}
				}
				break;

// http://en.wikipedia.org/wiki/Audio_Video_Interleave
			case 'AVI ':
				$info['fileformat'] = 'avi';
				$info['mime_type']  = 'video/avi';

$thisfile_video['bitrate_mode'] = 'vbr'; // maybe not, but probably
				$thisfile_video['dataformat']   = 'avi';

$thisfile_riff_video_current = array();

if (isset($thisfile_riff[$RIFFsubtype]['movi']['offset'])) {
					$info['avdataoffset'] = $thisfile_riff[$RIFFsubtype]['movi']['offset'] + 8;
					if (isset($thisfile_riff['AVIX'])) {
						$info['avdataend'] = $thisfile_riff['AVIX'][(count($thisfile_riff['AVIX']) - 1)]['chunks']['movi']['offset'] + $thisfile_riff['AVIX'][(count($thisfile_riff['AVIX']) - 1)]['chunks']['movi']['size'];
					} else {
						$info['avdataend'] = $thisfile_riff['AVI ']['movi']['offset'] + $thisfile_riff['AVI ']['movi']['size'];
					}
					if ($info['avdataend'] > $info['filesize']) {
						$this->warning('Probably truncated file - expecting '.($info['avdataend'] - $info['avdataoffset']).' bytes of data, only found '.($info['filesize'] - $info['avdataoffset']).' (short by '.($info['avdataend'] - $info['filesize']).' bytes)');
						$info['avdataend'] = $info['filesize'];
					}
				}

if (isset($thisfile_riff['AVI ']['hdrl']['strl']['indx'])) {
					//$bIndexType = array(
					//	0x00 => 'AVI_INDEX_OF_INDEXES',
					//	0x01 => 'AVI_INDEX_OF_CHUNKS',
					//	0x80 => 'AVI_INDEX_IS_DATA',
					//);
					//$bIndexSubtype = array(
					//	0x01 => array(
					//		0x01 => 'AVI_INDEX_2FIELD',
					//	),
					//);
					foreach ($thisfile_riff['AVI ']['hdrl']['strl']['indx'] as $streamnumber => $steamdataarray) {
						$ahsisd = &$thisfile_riff['AVI ']['hdrl']['strl']['indx'][$streamnumber]['data'];

$thisfile_riff_raw['indx'][$streamnumber]['wLongsPerEntry'] = $this->EitherEndian2Int(substr($ahsisd,  0, 2));
						$thisfile_riff_raw['indx'][$streamnumber]['bIndexSubType']  = $this->EitherEndian2Int(substr($ahsisd,  2, 1));
						$thisfile_riff_raw['indx'][$streamnumber]['bIndexType']     = $this->EitherEndian2Int(substr($ahsisd,  3, 1));
						$thisfile_riff_raw['indx'][$streamnumber]['nEntriesInUse']  = $this->EitherEndian2Int(substr($ahsisd,  4, 4));
						$thisfile_riff_raw['indx'][$streamnumber]['dwChunkId']      =                         substr($ahsisd,  8, 4);
						$thisfile_riff_raw['indx'][$streamnumber]['dwReserved']     = $this->EitherEndian2Int(substr($ahsisd, 12, 4));

//$thisfile_riff_raw['indx'][$streamnumber]['bIndexType_name']    =    $bIndexType[$thisfile_riff_raw['indx'][$streamnumber]['bIndexType']];
						//$thisfile_riff_raw['indx'][$streamnumber]['bIndexSubType_name'] = $bIndexSubtype[$thisfile_riff_raw['indx'][$streamnumber]['bIndexType']][$thisfile_riff_raw['indx'][$streamnumber]['bIndexSubType']];

unset($ahsisd);
					}
				}
				if (isset($thisfile_riff['AVI ']['hdrl']['avih'][$streamindex]['data'])) {
					$avihData = $thisfile_riff['AVI ']['hdrl']['avih'][$streamindex]['data'];

// shortcut
					$thisfile_riff_raw['avih'] = array();
					$thisfile_riff_raw_avih = &$thisfile_riff_raw['avih'];

$thisfile_riff_raw_avih['dwMicroSecPerFrame']    = $this->EitherEndian2Int(substr($avihData,  0, 4)); // frame display rate (or 0L)
					if ($thisfile_riff_raw_avih['dwMicroSecPerFrame'] == 0) {
						$this->error('Corrupt RIFF file: avih.dwMicroSecPerFrame == zero');
						return false;
					}

$flags = array(
						'dwMaxBytesPerSec',       // max. transfer rate
						'dwPaddingGranularity',   // pad to multiples of this size; normally 2K.
						'dwFlags',                // the ever-present flags
						'dwTotalFrames',          // # frames in file
						'dwInitialFrames',        //
						'dwStreams',              //
						'dwSuggestedBufferSize',  //
						'dwWidth',                //
						'dwHeight',               //
						'dwScale',                //
						'dwRate',                 //
						'dwStart',                //
						'dwLength',               //
					);
					$avih_offset = 4;
					foreach ($flags as $flag) {
						$thisfile_riff_raw_avih[$flag] = $this->EitherEndian2Int(substr($avihData, $avih_offset, 4));
						$avih_offset += 4;
					}

$flags = array(
						'hasindex'     => 0x00000010,
						'mustuseindex' => 0x00000020,
						'interleaved'  => 0x00000100,
						'trustcktype'  => 0x00000800,
						'capturedfile' => 0x00010000,
						'copyrighted'  => 0x00020010,
					);
					foreach ($flags as $flag => $value) {
						$thisfile_riff_raw_avih['flags'][$flag] = (bool) ($thisfile_riff_raw_avih['dwFlags'] & $value);
					}

// shortcut
					$thisfile_riff_video[$streamindex] = array();
					/** @var array $thisfile_riff_video_current */
					$thisfile_riff_video_current = &$thisfile_riff_video[$streamindex];

if ($thisfile_riff_raw_avih['dwWidth'] > 0) { // @phpstan-ignore-line
						$thisfile_riff_video_current['frame_width'] = $thisfile_riff_raw_avih['dwWidth'];
						$thisfile_video['resolution_x']             = $thisfile_riff_video_current['frame_width'];
					}
					if ($thisfile_riff_raw_avih['dwHeight'] > 0) { // @phpstan-ignore-line
						$thisfile_riff_video_current['frame_height'] = $thisfile_riff_raw_avih['dwHeight'];
						$thisfile_video['resolution_y']              = $thisfile_riff_video_current['frame_height'];
					}
					if ($thisfile_riff_raw_avih['dwTotalFrames'] > 0) { // @phpstan-ignore-line
						$thisfile_riff_video_current['total_frames'] = $thisfile_riff_raw_avih['dwTotalFrames'];
						$thisfile_video['total_frames']              = $thisfile_riff_video_current['total_frames'];
					}

$thisfile_riff_video_current['frame_rate'] = round(1000000 / $thisfile_riff_raw_avih['dwMicroSecPerFrame'], 3);
					$thisfile_video['frame_rate'] = $thisfile_riff_video_current['frame_rate'];
				}
				if (isset($thisfile_riff['AVI ']['hdrl']['strl']['strh'][0]['data'])) {
					if (is_array($thisfile_riff['AVI ']['hdrl']['strl']['strh'])) {
						$thisfile_riff_raw_strf_strhfccType_streamindex = null;
						for ($i = 0; $i < count($thisfile_riff['AVI ']['hdrl']['strl']['strh']); $i++) {
							if (isset($thisfile_riff['AVI ']['hdrl']['strl']['strh'][$i]['data'])) {
								$strhData = $thisfile_riff['AVI ']['hdrl']['strl']['strh'][$i]['data'];
								$strhfccType = substr($strhData,  0, 4);

if (isset($thisfile_riff['AVI ']['hdrl']['strl']['strf'][$i]['data'])) {
									$strfData = $thisfile_riff['AVI ']['hdrl']['strl']['strf'][$i]['data'];

if (!isset($thisfile_riff_raw['strf'][$strhfccType][$streamindex])) {
										$thisfile_riff_raw['strf'][$strhfccType][$streamindex] = null;
									}
									// shortcut
									$thisfile_riff_raw_strf_strhfccType_streamindex = &$thisfile_riff_raw['strf'][$strhfccType][$streamindex];

switch ($strhfccType) {
										case 'auds':
											$thisfile_audio['bitrate_mode'] = 'cbr';
											$thisfile_audio_dataformat      = 'wav';
											if (isset($thisfile_riff_audio) && is_array($thisfile_riff_audio)) {
												$streamindex = count($thisfile_riff_audio);
											}

$thisfile_riff_audio[$streamindex] = self::parseWAVEFORMATex($strfData);
											$thisfile_audio['wformattag'] = $thisfile_riff_audio[$streamindex]['raw']['wFormatTag'];

// shortcut
											$thisfile_audio['streams'][$streamindex] = $thisfile_riff_audio[$streamindex];
											$thisfile_audio_streams_currentstream = &$thisfile_audio['streams'][$streamindex];

if ($thisfile_audio_streams_currentstream['bits_per_sample'] == 0) {
												unset($thisfile_audio_streams_currentstream['bits_per_sample']);
											}
											$thisfile_audio_streams_currentstream['wformattag'] = $thisfile_audio_streams_currentstream['raw']['wFormatTag'];
											unset($thisfile_audio_streams_currentstream['raw']);

// shortcut
											$thisfile_riff_raw['strf'][$strhfccType][$streamindex] = $thisfile_riff_audio[$streamindex]['raw'];

unset($thisfile_riff_audio[$streamindex]['raw']);
											$thisfile_audio = getid3_lib::array_merge_noclobber($thisfile_audio, $thisfile_riff_audio[$streamindex]);

$thisfile_audio['lossless'] = false;
											switch ($thisfile_riff_raw_strf_strhfccType_streamindex['wFormatTag']) {
												case 0x0001:  // PCM
													$thisfile_audio_dataformat  = 'wav';
													$thisfile_audio['lossless'] = true;
													break;

case 0x0050: // MPEG Layer 2 or Layer 1
													$thisfile_audio_dataformat = 'mp2'; // Assume Layer-2
													break;

case 0x0055: // MPEG Layer 3
													$thisfile_audio_dataformat = 'mp3';
													break;

case 0x00FF: // AAC
													$thisfile_audio_dataformat = 'aac';
													break;

case 0x0161: // Windows Media v7 / v8 / v9
												case 0x0162: // Windows Media Professional v9
												case 0x0163: // Windows Media Lossess v9
													$thisfile_audio_dataformat = 'wma';
													break;

case 0x2000: // AC-3
													$thisfile_audio_dataformat = 'ac3';
													break;

case 0x2001: // DTS
													$thisfile_audio_dataformat = 'dts';
													break;

default:
													$thisfile_audio_dataformat = 'wav';
													break;
											}
											$thisfile_audio_streams_currentstream['dataformat']   = $thisfile_audio_dataformat;
											$thisfile_audio_streams_currentstream['lossless']     = $thisfile_audio['lossless'];
											$thisfile_audio_streams_currentstream['bitrate_mode'] = $thisfile_audio['bitrate_mode'];
											break;

case 'iavs':
										case 'vids':
											// shortcut
											$thisfile_riff_raw['strh'][$i]                  = array();
											$thisfile_riff_raw_strh_current                 = &$thisfile_riff_raw['strh'][$i];

$thisfile_riff_raw_strh_current['fccType']               =                         substr($strhData,  0, 4);  // same as $strhfccType;
											$thisfile_riff_raw_strh_current['fccHandler']            =                         substr($strhData,  4, 4);
											$thisfile_riff_raw_strh_current['dwFlags']               = $this->EitherEndian2Int(substr($strhData,  8, 4)); // Contains AVITF_* flags
											$thisfile_riff_raw_strh_current['wPriority']             = $this->EitherEndian2Int(substr($strhData, 12, 2));
											$thisfile_riff_raw_strh_current['wLanguage']             = $this->EitherEndian2Int(substr($strhData, 14, 2));
											$thisfile_riff_raw_strh_current['dwInitialFrames']       = $this->EitherEndian2Int(substr($strhData, 16, 4));
											$thisfile_riff_raw_strh_current['dwScale']               = $this->EitherEndian2Int(substr($strhData, 20, 4));
											$thisfile_riff_raw_strh_current['dwRate']                = $this->EitherEndian2Int(substr($strhData, 24, 4));
											$thisfile_riff_raw_strh_current['dwStart']               = $this->EitherEndian2Int(substr($strhData, 28, 4));
											$thisfile_riff_raw_strh_current['dwLength']              = $this->EitherEndian2Int(substr($strhData, 32, 4));
											$thisfile_riff_raw_strh_current['dwSuggestedBufferSize'] = $this->EitherEndian2Int(substr($strhData, 36, 4));
											$thisfile_riff_raw_strh_current['dwQuality']             = $this->EitherEndian2Int(substr($strhData, 40, 4));
											$thisfile_riff_raw_strh_current['dwSampleSize']          = $this->EitherEndian2Int(substr($strhData, 44, 4));
											$thisfile_riff_raw_strh_current['rcFrame']               = $this->EitherEndian2Int(substr($strhData, 48, 4));

$thisfile_riff_video_current['codec'] = self::fourccLookup($thisfile_riff_raw_strh_current['fccHandler']);
											$thisfile_video['fourcc']             = $thisfile_riff_raw_strh_current['fccHandler'];
											if (!$thisfile_riff_video_current['codec'] && isset($thisfile_riff_raw_strf_strhfccType_streamindex['fourcc']) && self::fourccLookup($thisfile_riff_raw_strf_strhfccType_streamindex['fourcc'])) {
												$thisfile_riff_video_current['codec'] = self::fourccLookup($thisfile_riff_raw_strf_strhfccType_streamindex['fourcc']);
												$thisfile_video['fourcc']             = $thisfile_riff_raw_strf_strhfccType_streamindex['fourcc'];
											}
											$thisfile_video['codec']              = $thisfile_riff_video_current['codec'];
											$thisfile_video['pixel_aspect_ratio'] = (float) 1;
											switch ($thisfile_riff_raw_strh_current['fccHandler']) {
												case 'HFYU': // Huffman Lossless Codec
												case 'IRAW': // Intel YUV Uncompressed
												case 'YUY2': // Uncompressed YUV 4:2:2
													$thisfile_video['lossless'] = true;
													break;

default:
													$thisfile_video['lossless'] = false;
													break;
											}

switch ($strhfccType) {
												case 'vids':
													$thisfile_riff_raw_strf_strhfccType_streamindex = self::ParseBITMAPINFOHEADER(substr($strfData, 0, 40), ($this->container == 'riff'));
													$thisfile_video['bits_per_sample'] = $thisfile_riff_raw_strf_strhfccType_streamindex['biBitCount'];

if ($thisfile_riff_video_current['codec'] == 'DV') {
														$thisfile_riff_video_current['dv_type'] = 2;
													}
													break;

case 'iavs':
													$thisfile_riff_video_current['dv_type'] = 1;
													break;
											}
											break;

default:
											$this->warning('Unhandled fccType for stream ('.$i.'): "'.$strhfccType.'"');
											break;

}
								}
							}

if (isset($thisfile_riff_raw_strf_strhfccType_streamindex) && isset($thisfile_riff_raw_strf_strhfccType_streamindex['fourcc'])) {

$thisfile_video['fourcc'] = $thisfile_riff_raw_strf_strhfccType_streamindex['fourcc'];
								if (self::fourccLookup($thisfile_video['fourcc'])) {
									$thisfile_riff_video_current['codec'] = self::fourccLookup($thisfile_video['fourcc']);
									$thisfile_video['codec']              = $thisfile_riff_video_current['codec'];
								}

switch ($thisfile_riff_raw_strf_strhfccType_streamindex['fourcc']) {
									case 'HFYU': // Huffman Lossless Codec
									case 'IRAW': // Intel YUV Uncompressed
									case 'YUY2': // Uncompressed YUV 4:2:2
										$thisfile_video['lossless']        = true;
										//$thisfile_video['bits_per_sample'] = 24;
										break;

default:
										$thisfile_video['lossless']        = false;
										//$thisfile_video['bits_per_sample'] = 24;
										break;
								}

}
						}
					}
				}
				break;

case 'AMV ':
				$info['fileformat'] = 'amv';
				$info['mime_type']  = 'video/amv';

$thisfile_video['bitrate_mode']    = 'vbr'; // it's MJPEG, presumably contant-quality encoding, thereby VBR
				$thisfile_video['dataformat']      = 'mjpeg';
				$thisfile_video['codec']           = 'mjpeg';
				$thisfile_video['lossless']        = false;
				$thisfile_video['bits_per_sample'] = 24;

$thisfile_audio['dataformat']   = 'adpcm';
				$thisfile_audio['lossless']     = false;
				break;

// http://en.wikipedia.org/wiki/CD-DA
			case 'CDDA':
				$info['fileformat'] = 'cda';
				unset($info['mime_type']);

$thisfile_audio_dataformat      = 'cda';

$info['avdataoffset'] = 44;

if (isset($thisfile_riff['CDDA']['fmt '][0]['data'])) {
					// shortcut
					$thisfile_riff_CDDA_fmt_0 = &$thisfile_riff['CDDA']['fmt '][0];

$thisfile_riff_CDDA_fmt_0['unknown1']           = $this->EitherEndian2Int(substr($thisfile_riff_CDDA_fmt_0['data'],  0, 2));
					$thisfile_riff_CDDA_fmt_0['track_num']          = $this->EitherEndian2Int(substr($thisfile_riff_CDDA_fmt_0['data'],  2, 2));
					$thisfile_riff_CDDA_fmt_0['disc_id']            = $this->EitherEndian2Int(substr($thisfile_riff_CDDA_fmt_0['data'],  4, 4));
					$thisfile_riff_CDDA_fmt_0['start_offset_frame'] = $this->EitherEndian2Int(substr($thisfile_riff_CDDA_fmt_0['data'],  8, 4));
					$thisfile_riff_CDDA_fmt_0['playtime_frames']    = $this->EitherEndian2Int(substr($thisfile_riff_CDDA_fmt_0['data'], 12, 4));
					$thisfile_riff_CDDA_fmt_0['unknown6']           = $this->EitherEndian2Int(substr($thisfile_riff_CDDA_fmt_0['data'], 16, 4));
					$thisfile_riff_CDDA_fmt_0['unknown7']           = $this->EitherEndian2Int(substr($thisfile_riff_CDDA_fmt_0['data'], 20, 4));

$thisfile_riff_CDDA_fmt_0['start_offset_seconds'] = (float) $thisfile_riff_CDDA_fmt_0['start_offset_frame'] / 75;
					$thisfile_riff_CDDA_fmt_0['playtime_seconds']     = (float) $thisfile_riff_CDDA_fmt_0['playtime_frames'] / 75;
					$info['comments']['track_number']         = $thisfile_riff_CDDA_fmt_0['track_num'];
					$info['playtime_seconds']                 = $thisfile_riff_CDDA_fmt_0['playtime_seconds'];

// hardcoded data for CD-audio
					$thisfile_audio['lossless']        = true;
					$thisfile_audio['sample_rate']     = 44100;
					$thisfile_audio['channels']        = 2;
					$thisfile_audio['bits_per_sample'] = 16;
					$thisfile_audio['bitrate']         = $thisfile_audio['sample_rate'] * $thisfile_audio['channels'] * $thisfile_audio['bits_per_sample'];
					$thisfile_audio['bitrate_mode']    = 'cbr';
				}
				break;

// http://en.wikipedia.org/wiki/AIFF
			case 'AIFF':
			case 'AIFC':
				$info['fileformat'] = 'aiff';
				$info['mime_type']  = 'audio/x-aiff';

$thisfile_audio['bitrate_mode'] = 'cbr';
				$thisfile_audio_dataformat      = 'aiff';
				$thisfile_audio['lossless']     = true;

if (isset($thisfile_riff[$RIFFsubtype]['SSND'][0]['offset'])) {
					$info['avdataoffset'] = $thisfile_riff[$RIFFsubtype]['SSND'][0]['offset'] + 8;
					$info['avdataend']    = $info['avdataoffset'] + $thisfile_riff[$RIFFsubtype]['SSND'][0]['size'];
					if ($info['avdataend'] > $info['filesize']) {
						if (($info['avdataend'] == ($info['filesize'] + 1)) && (($info['filesize'] % 2) == 1)) {
							// structures rounded to 2-byte boundary, but dumb encoders
							// forget to pad end of file to make this actually work
						} else {
							$this->warning('Probable truncated AIFF file: expecting '.$thisfile_riff[$RIFFsubtype]['SSND'][0]['size'].' bytes of audio data, only '.($info['filesize'] - $info['avdataoffset']).' bytes found');
						}
						$info['avdataend'] = $info['filesize'];
					}
				}

if (isset($thisfile_riff[$RIFFsubtype]['COMM'][0]['data'])) {

// shortcut
					$thisfile_riff_RIFFsubtype_COMM_0_data = &$thisfile_riff[$RIFFsubtype]['COMM'][0]['data'];

$thisfile_riff_audio['channels']         =         getid3_lib::BigEndian2Int(substr($thisfile_riff_RIFFsubtype_COMM_0_data,  0,  2), true);
					$thisfile_riff_audio['total_samples']    =         getid3_lib::BigEndian2Int(substr($thisfile_riff_RIFFsubtype_COMM_0_data,  2,  4), false);
					$thisfile_riff_audio['bits_per_sample']  =         getid3_lib::BigEndian2Int(substr($thisfile_riff_RIFFsubtype_COMM_0_data,  6,  2), true);
					$thisfile_riff_audio['sample_rate']      = (int) getid3_lib::BigEndian2Float(substr($thisfile_riff_RIFFsubtype_COMM_0_data,  8, 10));

if ($thisfile_riff[$RIFFsubtype]['COMM'][0]['size'] > 18) {
						$thisfile_riff_audio['codec_fourcc'] =                                   substr($thisfile_riff_RIFFsubtype_COMM_0_data, 18,  4);
						$CodecNameSize                       =         getid3_lib::BigEndian2Int(substr($thisfile_riff_RIFFsubtype_COMM_0_data, 22,  1), false);
						$thisfile_riff_audio['codec_name']   =                                   substr($thisfile_riff_RIFFsubtype_COMM_0_data, 23,  $CodecNameSize);
						switch ($thisfile_riff_audio['codec_name']) {
							case 'NONE':
								$thisfile_audio['codec']    = 'Pulse Code Modulation (PCM)';
								$thisfile_audio['lossless'] = true;
								break;

case '':
								switch ($thisfile_riff_audio['codec_fourcc']) {
									// http://developer.apple.com/qa/snd/snd07.html
									case 'sowt':
										$thisfile_riff_audio['codec_name'] = 'Two\'s Compliment Little-Endian PCM';
										$thisfile_audio['lossless'] = true;
										break;

case 'twos':
										$thisfile_riff_audio['codec_name'] = 'Two\'s Compliment Big-Endian PCM';
										$thisfile_audio['lossless'] = true;
										break;

default:
										break;
								}
								break;

default:
								$thisfile_audio['codec']    = $thisfile_riff_audio['codec_name'];
								$thisfile_audio['lossless'] = false;
								break;
						}
					}

$thisfile_audio['channels']        = $thisfile_riff_audio['channels'];
					if ($thisfile_riff_audio['bits_per_sample'] > 0) {
						$thisfile_audio['bits_per_sample'] = $thisfile_riff_audio['bits_per_sample'];
					}
					$thisfile_audio['sample_rate']     = $thisfile_riff_audio['sample_rate'];
					if ($thisfile_audio['sample_rate'] == 0) {
						$this->error('Corrupted AIFF file: sample_rate == zero');
						return false;
					}
					$info['playtime_seconds'] = $thisfile_riff_audio['total_samples'] / $thisfile_audio['sample_rate'];
				}

if (isset($thisfile_riff[$RIFFsubtype]['COMT'])) {
					$offset = 0;
					$CommentCount                                   = getid3_lib::BigEndian2Int(substr($thisfile_riff[$RIFFsubtype]['COMT'][0]['data'], $offset, 2), false);
					$offset += 2;
					for ($i = 0; $i < $CommentCount; $i++) {
						$info['comments_raw'][$i]['timestamp']      = getid3_lib::BigEndian2Int(substr($thisfile_riff[$RIFFsubtype]['COMT'][0]['data'], $offset, 4), false);
						$offset += 4;
						$info['comments_raw'][$i]['marker_id']      = getid3_lib::BigEndian2Int(substr($thisfile_riff[$RIFFsubtype]['COMT'][0]['data'], $offset, 2), true);
						$offset += 2;
						$CommentLength                              = getid3_lib::BigEndian2Int(substr($thisfile_riff[$RIFFsubtype]['COMT'][0]['data'], $offset, 2), false);
						$offset += 2;
						$info['comments_raw'][$i]['comment']        =                           substr($thisfile_riff[$RIFFsubtype]['COMT'][0]['data'], $offset, $CommentLength);
						$offset += $CommentLength;

$info['comments_raw'][$i]['timestamp_unix'] = getid3_lib::DateMac2Unix($info['comments_raw'][$i]['timestamp']);
						$thisfile_riff['comments']['comment'][] = $info['comments_raw'][$i]['comment'];
					}
				}

$CommentsChunkNames = array('NAME'=>'title', 'author'=>'artist', '(c) '=>'copyright', 'ANNO'=>'comment');
				foreach ($CommentsChunkNames as $key => $value) {
					if (isset($thisfile_riff[$RIFFsubtype][$key][0]['data'])) {
						// https://github.com/JamesHeinrich/getID3/issues/430
						$null_terminator_rows = explode("\x00", $thisfile_riff[$RIFFsubtype][$key][0]['data']);
						$thisfile_riff['comments'][$value][] = $null_terminator_rows[0];
					}
				}
/*
				if (isset($thisfile_riff[$RIFFsubtype]['ID3 '])) {
					getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.tag.id3v2.php', __FILE__, true);
					$getid3_temp = new getID3();
					$getid3_temp->openfile($this->getid3->filename, $this->getid3->info['filesize'], $this->getid3->fp);
					$getid3_id3v2 = new getid3_id3v2($getid3_temp);
					$getid3_id3v2->StartingOffset = $thisfile_riff[$RIFFsubtype]['ID3 '][0]['offset'] + 8;
					if ($thisfile_riff[$RIFFsubtype]['ID3 '][0]['valid'] = $getid3_id3v2->Analyze()) {
						$info['id3v2'] = $getid3_temp->info['id3v2'];
					}
					unset($getid3_temp, $getid3_id3v2);
				}
*/
				break;

// http://en.wikipedia.org/wiki/8SVX
			case '8SVX':
				$info['fileformat'] = '8svx';
				$info['mime_type']  = 'audio/8svx';

$thisfile_audio['bitrate_mode']    = 'cbr';
				$thisfile_audio_dataformat         = '8svx';
				$thisfile_audio['bits_per_sample'] = 8;
				$thisfile_audio['channels']        = 1; // overridden below, if need be
				$ActualBitsPerSample               = 0;

if (isset($thisfile_riff[$RIFFsubtype]['BODY'][0]['offset'])) {
					$info['avdataoffset'] = $thisfile_riff[$RIFFsubtype]['BODY'][0]['offset'] + 8;
					$info['avdataend']    = $info['avdataoffset'] + $thisfile_riff[$RIFFsubtype]['BODY'][0]['size'];
					if ($info['avdataend'] > $info['filesize']) {
						$this->warning('Probable truncated AIFF file: expecting '.$thisfile_riff[$RIFFsubtype]['BODY'][0]['size'].' bytes of audio data, only '.($info['filesize'] - $info['avdataoffset']).' bytes found');
					}
				}

if (isset($thisfile_riff[$RIFFsubtype]['VHDR'][0]['offset'])) {
					// shortcut
					$thisfile_riff_RIFFsubtype_VHDR_0 = &$thisfile_riff[$RIFFsubtype]['VHDR'][0];

$thisfile_riff_RIFFsubtype_VHDR_0['oneShotHiSamples']  =   getid3_lib::BigEndian2Int(substr($thisfile_riff_RIFFsubtype_VHDR_0['data'],  0, 4));
					$thisfile_riff_RIFFsubtype_VHDR_0['repeatHiSamples']   =   getid3_lib::BigEndian2Int(substr($thisfile_riff_RIFFsubtype_VHDR_0['data'],  4, 4));
					$thisfile_riff_RIFFsubtype_VHDR_0['samplesPerHiCycle'] =   getid3_lib::BigEndian2Int(substr($thisfile_riff_RIFFsubtype_VHDR_0['data'],  8, 4));
					$thisfile_riff_RIFFsubtype_VHDR_0['samplesPerSec']     =   getid3_lib::BigEndian2Int(substr($thisfile_riff_RIFFsubtype_VHDR_0['data'], 12, 2));
					$thisfile_riff_RIFFsubtype_VHDR_0['ctOctave']          =   getid3_lib::BigEndian2Int(substr($thisfile_riff_RIFFsubtype_VHDR_0['data'], 14, 1));
					$thisfile_riff_RIFFsubtype_VHDR_0['sCompression']      =   getid3_lib::BigEndian2Int(substr($thisfile_riff_RIFFsubtype_VHDR_0['data'], 15, 1));
					$thisfile_riff_RIFFsubtype_VHDR_0['Volume']            = getid3_lib::FixedPoint16_16(substr($thisfile_riff_RIFFsubtype_VHDR_0['data'], 16, 4));

$thisfile_audio['sample_rate'] = $thisfile_riff_RIFFsubtype_VHDR_0['samplesPerSec'];

switch ($thisfile_riff_RIFFsubtype_VHDR_0['sCompression']) {
						case 0:
							$thisfile_audio['codec']    = 'Pulse Code Modulation (PCM)';
							$thisfile_audio['lossless'] = true;
							$ActualBitsPerSample        = 8;
							break;

case 1:
							$thisfile_audio['codec']    = 'Fibonacci-delta encoding';
							$thisfile_audio['lossless'] = false;
							$ActualBitsPerSample        = 4;
							break;

default:
							$this->warning('Unexpected sCompression value in 8SVX.VHDR chunk - expecting 0 or 1, found "'.$thisfile_riff_RIFFsubtype_VHDR_0['sCompression'].'"');
							break;
					}
				}

if (isset($thisfile_riff[$RIFFsubtype]['CHAN'][0]['data'])) {
					$ChannelsIndex = getid3_lib::BigEndian2Int(substr($thisfile_riff[$RIFFsubtype]['CHAN'][0]['data'], 0, 4));
					switch ($ChannelsIndex) {
						case 6: // Stereo
							$thisfile_audio['channels'] = 2;
							break;

case 2: // Left channel only
						case 4: // Right channel only
							$thisfile_audio['channels'] = 1;
							break;

default:
							$this->warning('Unexpected value in 8SVX.CHAN chunk - expecting 2 or 4 or 6, found "'.$ChannelsIndex.'"');
							break;
					}

}

$thisfile_audio['bitrate'] = $thisfile_audio['sample_rate'] * $ActualBitsPerSample * $thisfile_audio['channels'];
				if (!empty($thisfile_audio['bitrate'])) {
					$info['playtime_seconds'] = ($info['avdataend'] - $info['avdataoffset']) / ($thisfile_audio['bitrate'] / 8);
				}
				break;

case 'CDXA':
				$info['fileformat'] = 'vcd'; // Asume Video CD
				$info['mime_type']  = 'video/mpeg';

if (!empty($thisfile_riff['CDXA']['data'][0]['size'])) {
					getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio-video.mpeg.php', __FILE__, true);

$getid3_temp = new getID3();
					$getid3_temp->openfile($this->getid3->filename, $this->getid3->info['filesize'], $this->getid3->fp);
					$getid3_mpeg = new getid3_mpeg($getid3_temp);
					$getid3_mpeg->Analyze();
					if (empty($getid3_temp->info['error'])) {
						$info['audio']   = $getid3_temp->info['audio'];
						$info['video']   = $getid3_temp->info['video'];
						$info['mpeg']    = $getid3_temp->info['mpeg'];
						$info['warning'] = $getid3_temp->info['warning'];
					}
					unset($getid3_temp, $getid3_mpeg);
				}
				break;

case 'WEBP':
				// https://developers.google.com/speed/webp/docs/riff_container
				// https://tools.ietf.org/html/rfc6386
				// https://chromium.googlesource.com/webm/libwebp/+/master/doc/webp-lossless-bitstream-spec.txt
				$info['fileformat'] = 'webp';
				$info['mime_type']  = 'image/webp';

if (!empty($thisfile_riff['WEBP']['VP8 '][0]['size'])) {
					$old_offset = $this->ftell();
					$this->fseek($thisfile_riff['WEBP']['VP8 '][0]['offset'] + 8); // 4 bytes "VP8 " + 4 bytes chunk size
					$WEBP_VP8_header = $this->fread(10);
					$this->fseek($old_offset);
					if (substr($WEBP_VP8_header, 3, 3) == "\x9D\x01\x2A") {
						$thisfile_riff['WEBP']['VP8 '][0]['keyframe']   = !(getid3_lib::LittleEndian2Int(substr($WEBP_VP8_header, 0, 3)) & 0x800000);
						$thisfile_riff['WEBP']['VP8 '][0]['version']    =  (getid3_lib::LittleEndian2Int(substr($WEBP_VP8_header, 0, 3)) & 0x700000) >> 20;
						$thisfile_riff['WEBP']['VP8 '][0]['show_frame'] =  (getid3_lib::LittleEndian2Int(substr($WEBP_VP8_header, 0, 3)) & 0x080000);
						$thisfile_riff['WEBP']['VP8 '][0]['data_bytes'] =  (getid3_lib::LittleEndian2Int(substr($WEBP_VP8_header, 0, 3)) & 0x07FFFF) >>  0;

$thisfile_riff['WEBP']['VP8 '][0]['scale_x']    =  (getid3_lib::LittleEndian2Int(substr($WEBP_VP8_header, 6, 2)) & 0xC000) >> 14;
						$thisfile_riff['WEBP']['VP8 '][0]['width']      =  (getid3_lib::LittleEndian2Int(substr($WEBP_VP8_header, 6, 2)) & 0x3FFF);
						$thisfile_riff['WEBP']['VP8 '][0]['scale_y']    =  (getid3_lib::LittleEndian2Int(substr($WEBP_VP8_header, 8, 2)) & 0xC000) >> 14;
						$thisfile_riff['WEBP']['VP8 '][0]['height']     =  (getid3_lib::LittleEndian2Int(substr($WEBP_VP8_header, 8, 2)) & 0x3FFF);

$info['video']['resolution_x'] = $thisfile_riff['WEBP']['VP8 '][0]['width'];
						$info['video']['resolution_y'] = $thisfile_riff['WEBP']['VP8 '][0]['height'];
					} else {
						$this->error('Expecting 9D 01 2A at offset '.($thisfile_riff['WEBP']['VP8 '][0]['offset'] + 8 + 3).', found "'.getid3_lib::PrintHexBytes(substr($WEBP_VP8_header, 3, 3)).'"');
					}

}
				if (!empty($thisfile_riff['WEBP']['VP8L'][0]['size'])) {
					$old_offset = $this->ftell();
					$this->fseek($thisfile_riff['WEBP']['VP8L'][0]['offset'] + 8); // 4 bytes "VP8L" + 4 bytes chunk size
					$WEBP_VP8L_header = $this->fread(10);
					$this->fseek($old_offset);
					if (substr($WEBP_VP8L_header, 0, 1) == "\x2F") {
						$width_height_flags = getid3_lib::LittleEndian2Bin(substr($WEBP_VP8L_header, 1, 4));
						$thisfile_riff['WEBP']['VP8L'][0]['width']         =        bindec(substr($width_height_flags, 18, 14)) + 1;
						$thisfile_riff['WEBP']['VP8L'][0]['height']        =        bindec(substr($width_height_flags,  4, 14)) + 1;
						$thisfile_riff['WEBP']['VP8L'][0]['alpha_is_used'] = (bool) bindec(substr($width_height_flags,  3,  1));
						$thisfile_riff['WEBP']['VP8L'][0]['version']       =        bindec(substr($width_height_flags,  0,  3));

$info['video']['resolution_x'] = $thisfile_riff['WEBP']['VP8L'][0]['width'];
						$info['video']['resolution_y'] = $thisfile_riff['WEBP']['VP8L'][0]['height'];
					} else {
						$this->error('Expecting 2F at offset '.($thisfile_riff['WEBP']['VP8L'][0]['offset'] + 8).', found "'.getid3_lib::PrintHexBytes(substr($WEBP_VP8L_header, 0, 1)).'"');
					}

}
				break;

default:
				$this->error('Unknown RIFF type: expecting one of (WAVE|RMP3|AVI |CDDA|AIFF|AIFC|8SVX|CDXA|WEBP), found "'.$RIFFsubtype.'" instead');
				//unset($info['fileformat']);
		}

switch ($RIFFsubtype) {
			case 'WAVE':
			case 'AIFF':
			case 'AIFC':
				$ID3v2_key_good = 'id3 ';
				$ID3v2_keys_bad = array('ID3 ', 'tag ');
				foreach ($ID3v2_keys_bad as $ID3v2_key_bad) {
					if (isset($thisfile_riff[$RIFFsubtype][$ID3v2_key_bad]) && !array_key_exists($ID3v2_key_good, $thisfile_riff[$RIFFsubtype])) {
						$thisfile_riff[$RIFFsubtype][$ID3v2_key_good] = $thisfile_riff[$RIFFsubtype][$ID3v2_key_bad];
						$this->warning('mapping "'.$ID3v2_key_bad.'" chunk to "'.$ID3v2_key_good.'"');
					}
				}

if (isset($thisfile_riff[$RIFFsubtype]['id3 '])) {
					getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.tag.id3v2.php', __FILE__, true);

$getid3_temp = new getID3();
					$getid3_temp->openfile($this->getid3->filename, $this->getid3->info['filesize'], $this->getid3->fp);
					$getid3_id3v2 = new getid3_id3v2($getid3_temp);
					$getid3_id3v2->StartingOffset = $thisfile_riff[$RIFFsubtype]['id3 '][0]['offset'] + 8;
					if ($thisfile_riff[$RIFFsubtype]['id3 '][0]['valid'] = $getid3_id3v2->Analyze()) {
						$info['id3v2'] = $getid3_temp->info['id3v2'];
					}
					unset($getid3_temp, $getid3_id3v2);
				}
				break;
		}

if (isset($thisfile_riff_WAVE['DISP']) && is_array($thisfile_riff_WAVE['DISP'])) {
			$thisfile_riff['comments']['title'][] = trim(substr($thisfile_riff_WAVE['DISP'][count($thisfile_riff_WAVE['DISP']) - 1]['data'], 4));
		}
		if (isset($thisfile_riff_WAVE['INFO']) && is_array($thisfile_riff_WAVE['INFO'])) {
			self::parseComments($thisfile_riff_WAVE['INFO'], $thisfile_riff['comments']);
		}
		if (isset($thisfile_riff['AVI ']['INFO']) && is_array($thisfile_riff['AVI ']['INFO'])) {
			self::parseComments($thisfile_riff['AVI ']['INFO'], $thisfile_riff['comments']);
		}

if (empty($thisfile_audio['encoder']) && !empty($info['mpeg']['audio']['LAME']['short_version'])) {
			$thisfile_audio['encoder'] = $info['mpeg']['audio']['LAME']['short_version'];
		}

if (!isset($info['playtime_seconds'])) {
			$info['playtime_seconds'] = 0;
		}
		if (isset($thisfile_riff_raw['strh'][0]['dwLength']) && isset($thisfile_riff_raw['avih']['dwMicroSecPerFrame'])) { // @phpstan-ignore-line
			// needed for >2GB AVIs where 'avih' chunk only lists number of frames in that chunk, not entire movie
			$info['playtime_seconds'] = $thisfile_riff_raw['strh'][0]['dwLength'] * ($thisfile_riff_raw['avih']['dwMicroSecPerFrame'] / 1000000);
		} elseif (isset($thisfile_riff_raw['avih']['dwTotalFrames']) && isset($thisfile_riff_raw['avih']['dwMicroSecPerFrame'])) { // @phpstan-ignore-line
			$info['playtime_seconds'] = $thisfile_riff_raw['avih']['dwTotalFrames'] * ($thisfile_riff_raw['avih']['dwMicroSecPerFrame'] / 1000000);
		}

if ($info['playtime_seconds'] > 0) {
			if ($thisfile_riff_audio !== null && $thisfile_riff_video !== null) {

if (!isset($info['bitrate'])) {
					$info['bitrate'] = ((($info['avdataend'] - $info['avdataoffset']) / $info['playtime_seconds']) * 8);
				}

} elseif ($thisfile_riff_audio !== null && $thisfile_riff_video === null) { // @phpstan-ignore-line

if (!isset($thisfile_audio['bitrate'])) {
					$thisfile_audio['bitrate'] = ((($info['avdataend'] - $info['avdataoffset']) / $info['playtime_seconds']) * 8);
				}

} elseif ($thisfile_riff_audio === null && $thisfile_riff_video !== null) {

if (!isset($thisfile_video['bitrate'])) {
					$thisfile_video['bitrate'] = ((($info['avdataend'] - $info['avdataoffset']) / $info['playtime_seconds']) * 8);
				}

}
		}

if (isset($thisfile_riff_video) && isset($thisfile_audio['bitrate']) && ($thisfile_audio['bitrate'] > 0) && ($info['playtime_seconds'] > 0)) {

$info['bitrate'] = ((($info['avdataend'] - $info['avdataoffset']) / $info['playtime_seconds']) * 8);
			$thisfile_audio['bitrate'] = 0;
			$thisfile_video['bitrate'] = $info['bitrate'];
			foreach ($thisfile_riff_audio as $channelnumber => $audioinfoarray) {
				$thisfile_video['bitrate'] -= $audioinfoarray['bitrate'];
				$thisfile_audio['bitrate'] += $audioinfoarray['bitrate'];
			}
			if ($thisfile_video['bitrate'] <= 0) {
				unset($thisfile_video['bitrate']);
			}
			if ($thisfile_audio['bitrate'] <= 0) {
				unset($thisfile_audio['bitrate']);
			}
		}

if (isset($info['mpeg']['audio'])) {
			$thisfile_audio_dataformat      = 'mp'.$info['mpeg']['audio']['layer'];
			$thisfile_audio['sample_rate']  = $info['mpeg']['audio']['sample_rate'];
			$thisfile_audio['channels']     = $info['mpeg']['audio']['channels'];
			$thisfile_audio['bitrate']      = $info['mpeg']['audio']['bitrate'];
			$thisfile_audio['bitrate_mode'] = strtolower($info['mpeg']['audio']['bitrate_mode']);
			if (!empty($info['mpeg']['audio']['codec'])) {
				$thisfile_audio['codec'] = $info['mpeg']['audio']['codec'].' '.$thisfile_audio['codec'];
			}
			if (!empty($thisfile_audio['streams'])) {
				foreach ($thisfile_audio['streams'] as $streamnumber => $streamdata) {
					if ($streamdata['dataformat'] == $thisfile_audio_dataformat) {
						$thisfile_audio['streams'][$streamnumber]['sample_rate']  = $thisfile_audio['sample_rate'];
						$thisfile_audio['streams'][$streamnumber]['channels']     = $thisfile_audio['channels'];
						$thisfile_audio['streams'][$streamnumber]['bitrate']      = $thisfile_audio['bitrate'];
						$thisfile_audio['streams'][$streamnumber]['bitrate_mode'] = $thisfile_audio['bitrate_mode'];
						$thisfile_audio['streams'][$streamnumber]['codec']        = $thisfile_audio['codec'];
					}
				}
			}
			$getid3_mp3 = new getid3_mp3($this->getid3);
			$thisfile_audio['encoder_options'] = $getid3_mp3->GuessEncoderOptions();
			unset($getid3_mp3);
		}

if (!empty($thisfile_riff_raw['fmt ']['wBitsPerSample']) && ($thisfile_riff_raw['fmt ']['wBitsPerSample'] > 0)) {
			switch ($thisfile_audio_dataformat) {
				case 'ac3':
					// ignore bits_per_sample
					break;

default:
					$thisfile_audio['bits_per_sample'] = $thisfile_riff_raw['fmt ']['wBitsPerSample'];
					break;
			}
		}

if (empty($thisfile_riff_raw)) {
			unset($thisfile_riff['raw']);
		}
		if (empty($thisfile_riff_audio)) {
			unset($thisfile_riff['audio']);
		}
		if (empty($thisfile_riff_video)) {
			unset($thisfile_riff['video']);
		}

return true;
	}

/**
	 * @param int $startoffset
	 * @param int $maxoffset
	 *
	 * @return array|false
	 *
	 * @throws Exception
	 * @throws getid3_exception
	 */
	public function ParseRIFFAMV($startoffset, $maxoffset) {
		// AMV files are RIFF-AVI files with parts of the spec deliberately broken, such as chunk size fields hardcoded to zero (because players known in hardware that these fields are always a certain size

// https://code.google.com/p/amv-codec-tools/wiki/AmvDocumentation
		//typedef struct _amvmainheader {
		//FOURCC fcc; // 'amvh'
		//DWORD cb;
		//DWORD dwMicroSecPerFrame;
		//BYTE reserve[28];
		//DWORD dwWidth;
		//DWORD dwHeight;
		//DWORD dwSpeed;
		//DWORD reserve0;
		//DWORD reserve1;
		//BYTE bTimeSec;
		//BYTE bTimeMin;
		//WORD wTimeHour;
		//} AMVMAINHEADER;

$info = &$this->getid3->info;
		$RIFFchunk = false;

try {

$this->fseek($startoffset);
			$maxoffset = min($maxoffset, $info['avdataend']);
			$AMVheader = $this->fread(284);
			if (substr($AMVheader,   0,  8) != 'hdrlamvh') {
				throw new Exception('expecting "hdrlamv" at offset '.($startoffset +   0).', found "'.substr($AMVheader,   0, 8).'"');
			}
			if (substr($AMVheader,   8,  4) != "\x38\x00\x00\x00") { // "amvh" chunk size, hardcoded to 0x38 = 56 bytes
				throw new Exception('expecting "0x38000000" at offset '.($startoffset +   8).', found "'.getid3_lib::PrintHexBytes(substr($AMVheader,   8, 4)).'"');
			}
			$RIFFchunk = array();
			$RIFFchunk['amvh']['us_per_frame']   = getid3_lib::LittleEndian2Int(substr($AMVheader,  12,  4));
			$RIFFchunk['amvh']['reserved28']     =                              substr($AMVheader,  16, 28);  // null? reserved?
			$RIFFchunk['amvh']['resolution_x']   = getid3_lib::LittleEndian2Int(substr($AMVheader,  44,  4));
			$RIFFchunk['amvh']['resolution_y']   = getid3_lib::LittleEndian2Int(substr($AMVheader,  48,  4));
			$RIFFchunk['amvh']['frame_rate_int'] = getid3_lib::LittleEndian2Int(substr($AMVheader,  52,  4));
			$RIFFchunk['amvh']['reserved0']      = getid3_lib::LittleEndian2Int(substr($AMVheader,  56,  4)); // 1? reserved?
			$RIFFchunk['amvh']['reserved1']      = getid3_lib::LittleEndian2Int(substr($AMVheader,  60,  4)); // 0? reserved?
			$RIFFchunk['amvh']['runtime_sec']    = getid3_lib::LittleEndian2Int(substr($AMVheader,  64,  1));
			$RIFFchunk['amvh']['runtime_min']    = getid3_lib::LittleEndian2Int(substr($AMVheader,  65,  1));
			$RIFFchunk['amvh']['runtime_hrs']    = getid3_lib::LittleEndian2Int(substr($AMVheader,  66,  2));

$info['video']['frame_rate']   = 1000000 / $RIFFchunk['amvh']['us_per_frame'];
			$info['video']['resolution_x'] = $RIFFchunk['amvh']['resolution_x'];
			$info['video']['resolution_y'] = $RIFFchunk['amvh']['resolution_y'];
			$info['playtime_seconds']      = ($RIFFchunk['amvh']['runtime_hrs'] * 3600) + ($RIFFchunk['amvh']['runtime_min'] * 60) + $RIFFchunk['amvh']['runtime_sec'];

// the rest is all hardcoded(?) and does not appear to be useful until you get to audio info at offset 256, even then everything is probably hardcoded

if (substr($AMVheader,  68, 20) != 'LIST'."\x00\x00\x00\x00".'strlstrh'."\x38\x00\x00\x00") {
				throw new Exception('expecting "LIST<0x00000000>strlstrh<0x38000000>" at offset '.($startoffset +  68).', found "'.getid3_lib::PrintHexBytes(substr($AMVheader,  68, 20)).'"');
			}
			// followed by 56 bytes of null: substr($AMVheader,  88, 56) -> 144
			if (substr($AMVheader, 144,  8) != 'strf'."\x24\x00\x00\x00") {
				throw new Exception('expecting "strf<0x24000000>" at offset '.($startoffset + 144).', found "'.getid3_lib::PrintHexBytes(substr($AMVheader, 144,  8)).'"');
			}
			// followed by 36 bytes of null: substr($AMVheader, 144, 36) -> 180

if (substr($AMVheader, 188, 20) != 'LIST'."\x00\x00\x00\x00".'strlstrh'."\x30\x00\x00\x00") {
				throw new Exception('expecting "LIST<0x00000000>strlstrh<0x30000000>" at offset '.($startoffset + 188).', found "'.getid3_lib::PrintHexBytes(substr($AMVheader, 188, 20)).'"');
			}
			// followed by 48 bytes of null: substr($AMVheader, 208, 48) -> 256
			if (substr($AMVheader, 256,  8) != 'strf'."\x14\x00\x00\x00") {
				throw new Exception('expecting "strf<0x14000000>" at offset '.($startoffset + 256).', found "'.getid3_lib::PrintHexBytes(substr($AMVheader, 256,  8)).'"');
			}
			// followed by 20 bytes of a modified WAVEFORMATEX:
			// typedef struct {
			// WORD wFormatTag;       //(Fixme: this is equal to PCM's 0x01 format code)
			// WORD nChannels;        //(Fixme: this is always 1)
			// DWORD nSamplesPerSec;  //(Fixme: for all known sample files this is equal to 22050)
			// DWORD nAvgBytesPerSec; //(Fixme: for all known sample files this is equal to 44100)
			// WORD nBlockAlign;      //(Fixme: this seems to be 2 in AMV files, is this correct ?)
			// WORD wBitsPerSample;   //(Fixme: this seems to be 16 in AMV files instead of the expected 4)
			// WORD cbSize;           //(Fixme: this seems to be 0 in AMV files)
			// WORD reserved;
			// } WAVEFORMATEX;
			$RIFFchunk['strf']['wformattag']      = getid3_lib::LittleEndian2Int(substr($AMVheader,  264,  2));
			$RIFFchunk['strf']['nchannels']       = getid3_lib::LittleEndian2Int(substr($AMVheader,  266,  2));
			$RIFFchunk['strf']['nsamplespersec']  = getid3_lib::LittleEndian2Int(substr($AMVheader,  268,  4));
			$RIFFchunk['strf']['navgbytespersec'] = getid3_lib::LittleEndian2Int(substr($AMVheader,  272,  4));
			$RIFFchunk['strf']['nblockalign']     = getid3_lib::LittleEndian2Int(substr($AMVheader,  276,  2));
			$RIFFchunk['strf']['wbitspersample']  = getid3_lib::LittleEndian2Int(substr($AMVheader,  278,  2));
			$RIFFchunk['strf']['cbsize']          = getid3_lib::LittleEndian2Int(substr($AMVheader,  280,  2));
			$RIFFchunk['strf']['reserved']        = getid3_lib::LittleEndian2Int(substr($AMVheader,  282,  2));

$info['audio']['lossless']        = false;
			$info['audio']['sample_rate']     = $RIFFchunk['strf']['nsamplespersec'];
			$info['audio']['channels']        = $RIFFchunk['strf']['nchannels'];
			$info['audio']['bits_per_sample'] = $RIFFchunk['strf']['wbitspersample'];
			$info['audio']['bitrate']         = $info['audio']['sample_rate'] * $info['audio']['channels'] * $info['audio']['bits_per_sample'];
			$info['audio']['bitrate_mode']    = 'cbr';

} catch (getid3_exception $e) {
			if ($e->getCode() == 10) {
				$this->warning('RIFFAMV parser: '.$e->getMessage());
			} else {
				throw $e;
			}
		}

return $RIFFchunk;
	}

/**
	 * @param int $startoffset
	 * @param int $maxoffset
	 *
	 * @return array|false
	 * @throws getid3_exception
	 */
	public function ParseRIFF($startoffset, $maxoffset) {
		$info = &$this->getid3->info;

$RIFFchunk = array();
		$FoundAllChunksWeNeed = false;
		$LISTchunkParent = null;
		$LISTchunkMaxOffset = null;
		$AC3syncwordBytes = pack('n', getid3_ac3::syncword); // 0x0B77 -> "\x0B\x77"

try {
			$this->fseek($startoffset);
			$maxoffset = min($maxoffset, $info['avdataend']);
			while ($this->ftell() < $maxoffset) {
				$chunknamesize = $this->fread(8);
				//$chunkname =                          substr($chunknamesize, 0, 4);
				$chunkname = str_replace("\x00", '_', substr($chunknamesize, 0, 4));  // note: chunk names of 4 null bytes do appear to be legal (has been observed inside INFO and PRMI chunks, for example), but makes traversing array keys more difficult
				$chunksize =  $this->EitherEndian2Int(substr($chunknamesize, 4, 4));
				//if (strlen(trim($chunkname, "\x00")) < 4) {
				if (strlen($chunkname) < 4) {
					$this->error('Expecting chunk name at offset '.($this->ftell() - 8).' but found nothing. Aborting RIFF parsing.');
					break;
				}
				if ($chunksize == 0) {
					if ($chunkname == 'JUNK') {
						// this is allowed
					} elseif ($chunkname == 'data') {
						// https://github.com/JamesHeinrich/getID3/issues/468
						// may occur in streaming files where the data size is unknown
						$chunksize = $info['avdataend'] - $this->ftell();
						$this->warning('RIFF.data size field is empty, assuming the correct value is filesize-offset ('.$chunksize.')');
					} else {
						$this->warning('Chunk ('.$chunkname.') size at offset '.($this->ftell() - 4).' is zero. Aborting RIFF parsing.');
						break;
					}
				}
				if (($chunksize % 2) != 0) {
					// all structures are packed on word boundaries
					$chunksize++;
				}

switch ($chunkname) {
					case 'LIST':
						$listname = $this->fread(4);
						if (preg_match('#^(movi|rec )$#i', $listname)) {
							$RIFFchunk[$listname]['offset'] = $this->ftell() - 4;
							$RIFFchunk[$listname]['size']   = $chunksize;

if (!$FoundAllChunksWeNeed) {
								$WhereWeWere      = $this->ftell();
								$AudioChunkHeader = $this->fread(12);
								$AudioChunkStreamNum  =                              substr($AudioChunkHeader, 0, 2);
								$AudioChunkStreamType =                              substr($AudioChunkHeader, 2, 2);
								$AudioChunkSize       = getid3_lib::LittleEndian2Int(substr($AudioChunkHeader, 4, 4));

if ($AudioChunkStreamType == 'wb') {
									$FirstFourBytes = substr($AudioChunkHeader, 8, 4);
									if (preg_match('/^\xFF[\xE2-\xE7\xF2-\xF7\xFA-\xFF][\x00-\xEB]/s', $FirstFourBytes)) {
										// MP3
										if (getid3_mp3::MPEGaudioHeaderBytesValid($FirstFourBytes)) {
											$getid3_temp = new getID3();
											$getid3_temp->openfile($this->getid3->filename, $this->getid3->info['filesize'], $this->getid3->fp);
											$getid3_temp->info['avdataoffset'] = $this->ftell() - 4;
											$getid3_temp->info['avdataend']    = $this->ftell() + $AudioChunkSize;
											$getid3_mp3 = new getid3_mp3($getid3_temp, __CLASS__);
											$getid3_mp3->getOnlyMPEGaudioInfo($getid3_temp->info['avdataoffset'], false);
											if (isset($getid3_temp->info['mpeg']['audio'])) {
												$info['mpeg']['audio']         = $getid3_temp->info['mpeg']['audio'];
												$info['audio']                 = $getid3_temp->info['audio'];
												$info['audio']['dataformat']   = 'mp'.$info['mpeg']['audio']['layer'];
												$info['audio']['sample_rate']  = $info['mpeg']['audio']['sample_rate'];
												$info['audio']['channels']     = $info['mpeg']['audio']['channels'];
												$info['audio']['bitrate']      = $info['mpeg']['audio']['bitrate'];
												$info['audio']['bitrate_mode'] = strtolower($info['mpeg']['audio']['bitrate_mode']);
												//$info['bitrate']               = $info['audio']['bitrate'];
											}
											unset($getid3_temp, $getid3_mp3);
										}

} elseif (strpos($FirstFourBytes, $AC3syncwordBytes) === 0) {
										// AC3
										$getid3_temp = new getID3();
										$getid3_temp->openfile($this->getid3->filename, $this->getid3->info['filesize'], $this->getid3->fp);
										$getid3_temp->info['avdataoffset'] = $this->ftell() - 4;
										$getid3_temp->info['avdataend']    = $this->ftell() + $AudioChunkSize;
										$getid3_ac3 = new getid3_ac3($getid3_temp);
										$getid3_ac3->Analyze();
										if (empty($getid3_temp->info['error'])) {
											$info['audio']   = $getid3_temp->info['audio'];
											$info['ac3']     = $getid3_temp->info['ac3'];
											if (!empty($getid3_temp->info['warning'])) {
												foreach ($getid3_temp->info['warning'] as $key => $value) {
													$this->warning($value);
												}
											}
										}
										unset($getid3_temp, $getid3_ac3);
									}
								}
								$FoundAllChunksWeNeed = true;
								$this->fseek($WhereWeWere);
							}
							$this->fseek($chunksize - 4, SEEK_CUR);

} else {

if (!isset($RIFFchunk[$listname])) {
								$RIFFchunk[$listname] = array();
							}
							$LISTchunkParent    = $listname;
							$LISTchunkMaxOffset = $this->ftell() - 4 + $chunksize;
							if ($parsedChunk = $this->ParseRIFF($this->ftell(), $LISTchunkMaxOffset)) {
								$RIFFchunk[$listname] = array_merge_recursive($RIFFchunk[$listname], $parsedChunk);
							}

}
						break;

default:
						if (preg_match('#^[0-9]{2}(wb|pc|dc|db)$#', $chunkname)) {
							$this->fseek($chunksize, SEEK_CUR);
							break;
						}
						$thisindex = 0;
						if (isset($RIFFchunk[$chunkname])) {
							$thisindex = count($RIFFchunk[$chunkname]);
						}
						$RIFFchunk[$chunkname][$thisindex]['offset'] = $this->ftell() - 8;
						$RIFFchunk[$chunkname][$thisindex]['size']   = $chunksize;
						switch ($chunkname) {
							case 'data':
								$info['avdataoffset'] = $this->ftell();
								$info['avdataend']    = $info['avdataoffset'] + $chunksize;

$testData = $this->fread(36);
								if ($testData === '') {
									break;
								}
								if (preg_match('/^\xFF[\xE2-\xE7\xF2-\xF7\xFA-\xFF][\x00-\xEB]/s', substr($testData, 0, 4))) {

// Probably is MP3 data
									if (getid3_mp3::MPEGaudioHeaderBytesValid(substr($testData, 0, 4))) {
										$getid3_temp = new getID3();
										$getid3_temp->openfile($this->getid3->filename, $this->getid3->info['filesize'], $this->getid3->fp);
										$getid3_temp->info['avdataoffset'] = $info['avdataoffset'];
										$getid3_temp->info['avdataend']    = $info['avdataend'];
										$getid3_mp3 = new getid3_mp3($getid3_temp, __CLASS__);
										$getid3_mp3->getOnlyMPEGaudioInfo($info['avdataoffset'], false);
										if (empty($getid3_temp->info['error'])) {
											$info['audio'] = $getid3_temp->info['audio'];
											$info['mpeg']  = $getid3_temp->info['mpeg'];
										}
										unset($getid3_temp, $getid3_mp3);
									}

} elseif (($isRegularAC3 = (substr($testData, 0, 2) == $AC3syncwordBytes)) || substr($testData, 8, 2) == strrev($AC3syncwordBytes)) {

// This is probably AC-3 data
									$getid3_temp = new getID3();
									if ($isRegularAC3) {
										$getid3_temp->openfile($this->getid3->filename, $this->getid3->info['filesize'], $this->getid3->fp);
										$getid3_temp->info['avdataoffset'] = $info['avdataoffset'];
										$getid3_temp->info['avdataend']    = $info['avdataend'];
									}
									$getid3_ac3 = new getid3_ac3($getid3_temp);
									if ($isRegularAC3) {
										$getid3_ac3->Analyze();
									} else {
										// Dolby Digital WAV
										// AC-3 content, but not encoded in same format as normal AC-3 file
										// For one thing, byte order is swapped
										$ac3_data = '';
										for ($i = 0; $i < 28; $i += 2) {
											$ac3_data .= substr($testData, 8 + $i + 1, 1);
											$ac3_data .= substr($testData, 8 + $i + 0, 1);
										}
										$getid3_ac3->getid3->info['avdataoffset'] = 0;
										$getid3_ac3->getid3->info['avdataend']    = strlen($ac3_data);
										$getid3_ac3->AnalyzeString($ac3_data);
									}

if (empty($getid3_temp->info['error'])) {
										$info['audio'] = $getid3_temp->info['audio'];
										$info['ac3']   = $getid3_temp->info['ac3'];
										if (!empty($getid3_temp->info['warning'])) {
											foreach ($getid3_temp->info['warning'] as $newerror) {
												$this->warning('getid3_ac3() says: ['.$newerror.']');
											}
										}
									}
									unset($getid3_temp, $getid3_ac3);

} elseif (preg_match('/^('.implode('|', array_map('preg_quote', getid3_dts::$syncwords)).')/', $testData)) {

// This is probably DTS data
									$getid3_temp = new getID3();
									$getid3_temp->openfile($this->getid3->filename, $this->getid3->info['filesize'], $this->getid3->fp);
									$getid3_temp->info['avdataoffset'] = $info['avdataoffset'];
									$getid3_dts = new getid3_dts($getid3_temp);
									$getid3_dts->Analyze();
									if (empty($getid3_temp->info['error'])) {
										$info['audio']            = $getid3_temp->info['audio'];
										$info['dts']              = $getid3_temp->info['dts'];
										$info['playtime_seconds'] = $getid3_temp->info['playtime_seconds']; // may not match RIFF calculations since DTS-WAV often used 14/16 bit-word packing
										if (!empty($getid3_temp->info['warning'])) {
											foreach ($getid3_temp->info['warning'] as $newerror) {
												$this->warning('getid3_dts() says: ['.$newerror.']');
											}
										}
									}

unset($getid3_temp, $getid3_dts);

} elseif (substr($testData, 0, 4) == 'wvpk') {

// This is WavPack data
									$info['wavpack']['offset'] = $info['avdataoffset'];
									$info['wavpack']['size']   = getid3_lib::LittleEndian2Int(substr($testData, 4, 4));
									$this->parseWavPackHeader(substr($testData, 8, 28));

} else {
									// This is some other kind of data (quite possibly just PCM)
									// do nothing special, just skip it
								}
								$nextoffset = $info['avdataend'];
								$this->fseek($nextoffset);
								break;

case 'iXML':
							case 'bext':
							case 'cart':
							case 'fmt ':
							case 'strh':
							case 'strf':
							case 'indx':
							case 'MEXT':
							case 'DISP':
							case 'wamd':
							case 'guan':
								// always read data in
							case 'JUNK':
								// should be: never read data in
								// but some programs write their version strings in a JUNK chunk (e.g. VirtualDub, AVIdemux, etc)
								if ($chunksize < 1048576) {
									if ($chunksize > 0) {
										$RIFFchunk[$chunkname][$thisindex]['data'] = $this->fread($chunksize);
										if ($chunkname == 'JUNK') {
											if (preg_match('#^([\\x20-\\x7F]+)#', $RIFFchunk[$chunkname][$thisindex]['data'], $matches)) {
												// only keep text characters [chr(32)-chr(127)]
												$info['riff']['comments']['junk'][] = trim($matches[1]);
											}
											// but if nothing there, ignore
											// remove the key in either case
											unset($RIFFchunk[$chunkname][$thisindex]['data']);
										}
									}
								} else {
									$this->warning('Chunk "'.$chunkname.'" at offset '.$this->ftell().' is unexpectedly larger than 1MB (claims to be '.number_format($chunksize).' bytes), skipping data');
									$this->fseek($chunksize, SEEK_CUR);
								}
								break;

//case 'IDVX':
							//	$info['divxtag']['comments'] = self::ParseDIVXTAG($this->fread($chunksize));
							//	break;

case 'scot':
								// https://cmsdk.com/node-js/adding-scot-chunk-to-wav-file.html
								$RIFFchunk[$chunkname][$thisindex]['data'] = $this->fread($chunksize);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['alter']           =                              substr($RIFFchunk[$chunkname][$thisindex]['data'],   0,   1);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['attrib']          =                              substr($RIFFchunk[$chunkname][$thisindex]['data'],   1,   1);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['artnum']          = getid3_lib::LittleEndian2Int(substr($RIFFchunk[$chunkname][$thisindex]['data'],   2,   2));
								$RIFFchunk[$chunkname][$thisindex]['parsed']['title']           =                              substr($RIFFchunk[$chunkname][$thisindex]['data'],   4,  43);  // "name" in other documentation
								$RIFFchunk[$chunkname][$thisindex]['parsed']['copy']            =                              substr($RIFFchunk[$chunkname][$thisindex]['data'],  47,   4);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['padd']            =                              substr($RIFFchunk[$chunkname][$thisindex]['data'],  51,   1);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['asclen']          =                              substr($RIFFchunk[$chunkname][$thisindex]['data'],  52,   5);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['startseconds']    = getid3_lib::LittleEndian2Int(substr($RIFFchunk[$chunkname][$thisindex]['data'],  57,   2));
								$RIFFchunk[$chunkname][$thisindex]['parsed']['starthundredths'] = getid3_lib::LittleEndian2Int(substr($RIFFchunk[$chunkname][$thisindex]['data'],  59,   2));
								$RIFFchunk[$chunkname][$thisindex]['parsed']['endseconds']      = getid3_lib::LittleEndian2Int(substr($RIFFchunk[$chunkname][$thisindex]['data'],  61,   2));
								$RIFFchunk[$chunkname][$thisindex]['parsed']['endhundreths']    = getid3_lib::LittleEndian2Int(substr($RIFFchunk[$chunkname][$thisindex]['data'],  63,   2));
								$RIFFchunk[$chunkname][$thisindex]['parsed']['sdate']           =                              substr($RIFFchunk[$chunkname][$thisindex]['data'],  65,   6);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['kdate']           =                              substr($RIFFchunk[$chunkname][$thisindex]['data'],  71,   6);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['start_hr']        =                              substr($RIFFchunk[$chunkname][$thisindex]['data'],  77,   1);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['kill_hr']         =                              substr($RIFFchunk[$chunkname][$thisindex]['data'],  78,   1);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['digital']         =                              substr($RIFFchunk[$chunkname][$thisindex]['data'],  79,   1);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['sample_rate']     = getid3_lib::LittleEndian2Int(substr($RIFFchunk[$chunkname][$thisindex]['data'],  80,   2));
								$RIFFchunk[$chunkname][$thisindex]['parsed']['stereo']          =                              substr($RIFFchunk[$chunkname][$thisindex]['data'],  82,   1);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['compress']        =                              substr($RIFFchunk[$chunkname][$thisindex]['data'],  83,   1);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['eomstrt']         = getid3_lib::LittleEndian2Int(substr($RIFFchunk[$chunkname][$thisindex]['data'],  84,   4));
								$RIFFchunk[$chunkname][$thisindex]['parsed']['eomlen']          = getid3_lib::LittleEndian2Int(substr($RIFFchunk[$chunkname][$thisindex]['data'],  88,   2));
								$RIFFchunk[$chunkname][$thisindex]['parsed']['attrib2']         = getid3_lib::LittleEndian2Int(substr($RIFFchunk[$chunkname][$thisindex]['data'],  90,   4));
								$RIFFchunk[$chunkname][$thisindex]['parsed']['future1']         =                              substr($RIFFchunk[$chunkname][$thisindex]['data'],  94,  12);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['catfontcolor']    = getid3_lib::LittleEndian2Int(substr($RIFFchunk[$chunkname][$thisindex]['data'], 106,   4));
								$RIFFchunk[$chunkname][$thisindex]['parsed']['catcolor']        = getid3_lib::LittleEndian2Int(substr($RIFFchunk[$chunkname][$thisindex]['data'], 110,   4));
								$RIFFchunk[$chunkname][$thisindex]['parsed']['segeompos']       = getid3_lib::LittleEndian2Int(substr($RIFFchunk[$chunkname][$thisindex]['data'], 114,   4));
								$RIFFchunk[$chunkname][$thisindex]['parsed']['vt_startsecs']    = getid3_lib::LittleEndian2Int(substr($RIFFchunk[$chunkname][$thisindex]['data'], 118,   2));
								$RIFFchunk[$chunkname][$thisindex]['parsed']['vt_starthunds']   = getid3_lib::LittleEndian2Int(substr($RIFFchunk[$chunkname][$thisindex]['data'], 120,   2));
								$RIFFchunk[$chunkname][$thisindex]['parsed']['priorcat']        =                              substr($RIFFchunk[$chunkname][$thisindex]['data'], 122,   3);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['priorcopy']       =                              substr($RIFFchunk[$chunkname][$thisindex]['data'], 125,   4);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['priorpadd']       =                              substr($RIFFchunk[$chunkname][$thisindex]['data'], 129,   1);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['postcat']         =                              substr($RIFFchunk[$chunkname][$thisindex]['data'], 130,   3);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['postcopy']        =                              substr($RIFFchunk[$chunkname][$thisindex]['data'], 133,   4);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['postpadd']        =                              substr($RIFFchunk[$chunkname][$thisindex]['data'], 137,   1);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['hrcanplay']       =                              substr($RIFFchunk[$chunkname][$thisindex]['data'], 138,  21);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['future2']         =                              substr($RIFFchunk[$chunkname][$thisindex]['data'], 159, 108);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['artist']          =                              substr($RIFFchunk[$chunkname][$thisindex]['data'], 267,  34);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['comment']         =                              substr($RIFFchunk[$chunkname][$thisindex]['data'], 301,  34); // "trivia" in other documentation
								$RIFFchunk[$chunkname][$thisindex]['parsed']['intro']           =                              substr($RIFFchunk[$chunkname][$thisindex]['data'], 335,   2);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['end']             =                              substr($RIFFchunk[$chunkname][$thisindex]['data'], 337,   1);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['year']            =                              substr($RIFFchunk[$chunkname][$thisindex]['data'], 338,   4);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['obsolete2']       =                              substr($RIFFchunk[$chunkname][$thisindex]['data'], 342,   1);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['rec_hr']          =                              substr($RIFFchunk[$chunkname][$thisindex]['data'], 343,   1);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['rdate']           =                              substr($RIFFchunk[$chunkname][$thisindex]['data'], 344,   6);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['mpeg_bitrate']    = getid3_lib::LittleEndian2Int(substr($RIFFchunk[$chunkname][$thisindex]['data'], 350,   2));
								$RIFFchunk[$chunkname][$thisindex]['parsed']['pitch']           = getid3_lib::LittleEndian2Int(substr($RIFFchunk[$chunkname][$thisindex]['data'], 352,   2));
								$RIFFchunk[$chunkname][$thisindex]['parsed']['playlevel']       = getid3_lib::LittleEndian2Int(substr($RIFFchunk[$chunkname][$thisindex]['data'], 354,   2));
								$RIFFchunk[$chunkname][$thisindex]['parsed']['lenvalid']        =                              substr($RIFFchunk[$chunkname][$thisindex]['data'], 356,   1);
								$RIFFchunk[$chunkname][$thisindex]['parsed']['filelength']      = getid3_lib::LittleEndian2Int(substr($RIFFchunk[$chunkname][$thisindex]['data'], 357,   4));
								$RIFFchunk[$chunkname][$thisindex]['parsed']['newplaylevel']    = getid3_lib::LittleEndian2Int(substr($RIFFchunk[$chunkname][$thisindex]['data'], 361,   2));
								$RIFFchunk[$chunkname][$thisindex]['parsed']['chopsize']        = getid3_lib::LittleEndian2Int(substr($RIFFchunk[$chunkname][$thisindex]['data'], 363,   4));
								$RIFFchunk[$chunkname][$thisindex]['parsed']['vteomovr']        = getid3_lib::LittleEndian2Int(substr($RIFFchunk[$chunkname][$thisindex]['data'], 367,   4));
								$RIFFchunk[$chunkname][$thisindex]['parsed']['desiredlen']      = getid3_lib::LittleEndian2Int(substr($RIFFchunk[$chunkname][$thisindex]['data'], 371,   4));
								$RIFFchunk[$chunkname][$thisindex]['parsed']['triggers']        = getid3_lib::LittleEndian2Int(substr($RIFFchunk[$chunkname][$thisindex]['data'], 375,   4));
								$RIFFchunk[$chunkname][$thisindex]['parsed']['fillout']         =                              substr($RIFFchunk[$chunkname][$thisindex]['data'], 379,   33);

foreach (array('title', 'artist', 'comment') as $key) {
									if (trim($RIFFchunk[$chunkname][$thisindex]['parsed'][$key])) {
										$info['riff']['comments'][$key] = array($RIFFchunk[$chunkname][$thisindex]['parsed'][$key]);
									}
								}
								if ($RIFFchunk[$chunkname][$thisindex]['parsed']['filelength'] && !empty($info['filesize']) && ($RIFFchunk[$chunkname][$thisindex]['parsed']['filelength'] != $info['filesize'])) {
									$this->warning('RIFF.WAVE.scot.filelength ('.$RIFFchunk[$chunkname][$thisindex]['parsed']['filelength'].') different from actual filesize ('.$info['filesize'].')');
								}
								break;

default:
								if (!empty($LISTchunkParent) && isset($LISTchunkMaxOffset) && (($RIFFchunk[$chunkname][$thisindex]['offset'] + $RIFFchunk[$chunkname][$thisindex]['size']) <= $LISTchunkMaxOffset)) {
									$RIFFchunk[$LISTchunkParent][$chunkname][$thisindex]['offset'] = $RIFFchunk[$chunkname][$thisindex]['offset'];
									$RIFFchunk[$LISTchunkParent][$chunkname][$thisindex]['size']   = $RIFFchunk[$chunkname][$thisindex]['size'];
									unset($RIFFchunk[$chunkname][$thisindex]['offset']);
									unset($RIFFchunk[$chunkname][$thisindex]['size']);
									if (isset($RIFFchunk[$chunkname][$thisindex]) && empty($RIFFchunk[$chunkname][$thisindex])) {
										unset($RIFFchunk[$chunkname][$thisindex]);
									}
									if (count($RIFFchunk[$chunkname]) === 0) {
										unset($RIFFchunk[$chunkname]);
									}
									$RIFFchunk[$LISTchunkParent][$chunkname][$thisindex]['data'] = $this->fread($chunksize);
								} elseif ($chunksize < 2048) {
									// only read data in if smaller than 2kB
									$RIFFchunk[$chunkname][$thisindex]['data'] = $this->fread($chunksize);
								} else {
									$this->fseek($chunksize, SEEK_CUR);
								}
								break;
						}
						break;
				}
			}

} catch (getid3_exception $e) {
			if ($e->getCode() == 10) {
				$this->warning('RIFF parser: '.$e->getMessage());
			} else {
				throw $e;
			}
		}

return !empty($RIFFchunk) ? $RIFFchunk : false;
	}

/**
	 * @param string $RIFFdata
	 *
	 * @return bool
	 */
	public function ParseRIFFdata(&$RIFFdata) {
		$info = &$this->getid3->info;
		if ($RIFFdata) {
			$tempfile = tempnam(GETID3_TEMP_DIR, 'getID3');
			$fp_temp  = fopen($tempfile, 'wb');
			$RIFFdataLength = strlen($RIFFdata);
			$NewLengthString = getid3_lib::LittleEndian2String($RIFFdataLength, 4);
			for ($i = 0; $i < 4; $i++) {
				$RIFFdata[($i + 4)] = $NewLengthString[$i];
			}
			fwrite($fp_temp, $RIFFdata);
			fclose($fp_temp);

$getid3_temp = new getID3();
			$getid3_temp->openfile($tempfile);
			$getid3_temp->info['filesize']     = $RIFFdataLength;
			$getid3_temp->info['filenamepath'] = $info['filenamepath'];
			$getid3_temp->info['tags']         = $info['tags'];
			$getid3_temp->info['warning']      = $info['warning'];
			$getid3_temp->info['error']        = $info['error'];
			$getid3_temp->info['comments']     = $info['comments'];
			$getid3_temp->info['audio']        = (isset($info['audio']) ? $info['audio'] : array());
			$getid3_temp->info['video']        = (isset($info['video']) ? $info['video'] : array());
			$getid3_riff = new getid3_riff($getid3_temp);
			$getid3_riff->Analyze();

$info['riff']     = $getid3_temp->info['riff'];
			$info['warning']  = $getid3_temp->info['warning'];
			$info['error']    = $getid3_temp->info['error'];
			$info['tags']     = $getid3_temp->info['tags'];
			$info['comments'] = $getid3_temp->info['comments'];
			unset($getid3_riff, $getid3_temp);
			unlink($tempfile);
		}
		return false;
	}

/**
	 * @param array $RIFFinfoArray
	 * @param array $CommentsTargetArray
	 *
	 * @return bool
	 */
	public static function parseComments(&$RIFFinfoArray, &$CommentsTargetArray) {
		$RIFFinfoKeyLookup = array(
			'IARL'=>'archivallocation',
			'IART'=>'artist',
			'ICDS'=>'costumedesigner',
			'ICMS'=>'commissionedby',
			'ICMT'=>'comment',
			'ICNT'=>'country',
			'ICOP'=>'copyright',
			'ICRD'=>'creationdate',
			'IDIM'=>'dimensions',
			'IDIT'=>'digitizationdate',
			'IDPI'=>'resolution',
			'IDST'=>'distributor',
			'IEDT'=>'editor',
			'IENG'=>'engineers',
			'IFRM'=>'accountofparts',
			'IGNR'=>'genre',
			'IKEY'=>'keywords',
			'ILGT'=>'lightness',
			'ILNG'=>'language',
			'IMED'=>'orignalmedium',
			'IMUS'=>'composer',
			'INAM'=>'title',
			'IPDS'=>'productiondesigner',
			'IPLT'=>'palette',
			'IPRD'=>'product',
			'IPRO'=>'producer',
			'IPRT'=>'part',
			'IRTD'=>'rating',
			'ISBJ'=>'subject',
			'ISFT'=>'software',
			'ISGN'=>'secondarygenre',
			'ISHP'=>'sharpness',
			'ISRC'=>'sourcesupplier',
			'ISRF'=>'digitizationsource',
			'ISTD'=>'productionstudio',
			'ISTR'=>'starring',
			'ITCH'=>'encoded_by',
			'IWEB'=>'url',
			'IWRI'=>'writer',
			'____'=>'comment',
		);
		foreach ($RIFFinfoKeyLookup as $key => $value) {
			if (isset($RIFFinfoArray[$key])) {
				foreach ($RIFFinfoArray[$key] as $commentid => $commentdata) {
					if (!empty($commentdata['data']) && trim($commentdata['data']) != '') {
						if (isset($CommentsTargetArray[$value])) {
							$CommentsTargetArray[$value][] =     trim($commentdata['data']);
						} else {
							$CommentsTargetArray[$value] = array(trim($commentdata['data']));
						}
					}
				}
			}
		}
		return true;
	}

/**
	 * @param string $WaveFormatExData
	 *
	 * @return array
	 */
	public static function parseWAVEFORMATex($WaveFormatExData) {
		// shortcut
		$WaveFormatEx        = array();
		$WaveFormatEx['raw'] = array();
		$WaveFormatEx_raw    = &$WaveFormatEx['raw'];

$WaveFormatEx_raw['wFormatTag']      = substr($WaveFormatExData,  0, 2);
		$WaveFormatEx_raw['nChannels']       = substr($WaveFormatExData,  2, 2);
		$WaveFormatEx_raw['nSamplesPerSec']  = substr($WaveFormatExData,  4, 4);
		$WaveFormatEx_raw['nAvgBytesPerSec'] = substr($WaveFormatExData,  8, 4);
		$WaveFormatEx_raw['nBlockAlign']     = substr($WaveFormatExData, 12, 2);
		$WaveFormatEx_raw['wBitsPerSample']  = substr($WaveFormatExData, 14, 2);
		if (strlen($WaveFormatExData) > 16) {
			$WaveFormatEx_raw['cbSize']      = substr($WaveFormatExData, 16, 2);
		}
		$WaveFormatEx_raw = array_map('getid3_lib::LittleEndian2Int', $WaveFormatEx_raw);

$WaveFormatEx['codec']           = self::wFormatTagLookup($WaveFormatEx_raw['wFormatTag']);
		$WaveFormatEx['channels']        = $WaveFormatEx_raw['nChannels'];
		$WaveFormatEx['sample_rate']     = $WaveFormatEx_raw['nSamplesPerSec'];
		$WaveFormatEx['bitrate']         = $WaveFormatEx_raw['nAvgBytesPerSec'] * 8;
		$WaveFormatEx['bits_per_sample'] = $WaveFormatEx_raw['wBitsPerSample'];

return $WaveFormatEx;
	}

/**
	 * @param string $WavPackChunkData
	 *
	 * @return bool
	 */
	public function parseWavPackHeader($WavPackChunkData) {
		// typedef struct {
		//     char ckID [4];
		//     long ckSize;
		//     short version;
		//     short bits;                // added for version 2.00
		//     short flags, shift;        // added for version 3.00
		//     long total_samples, crc, crc2;
		//     char extension [4], extra_bc, extras [3];
		// } WavpackHeader;

// shortcut
		$info = &$this->getid3->info;
		$info['wavpack']  = array();
		$thisfile_wavpack = &$info['wavpack'];

$thisfile_wavpack['version']           = getid3_lib::LittleEndian2Int(substr($WavPackChunkData,  0, 2));
		if ($thisfile_wavpack['version'] >= 2) {
			$thisfile_wavpack['bits']          = getid3_lib::LittleEndian2Int(substr($WavPackChunkData,  2, 2));
		}
		if ($thisfile_wavpack['version'] >= 3) {
			$thisfile_wavpack['flags_raw']     = getid3_lib::LittleEndian2Int(substr($WavPackChunkData,  4, 2));
			$thisfile_wavpack['shift']         = getid3_lib::LittleEndian2Int(substr($WavPackChunkData,  6, 2));
			$thisfile_wavpack['total_samples'] = getid3_lib::LittleEndian2Int(substr($WavPackChunkData,  8, 4));
			$thisfile_wavpack['crc1']          = getid3_lib::LittleEndian2Int(substr($WavPackChunkData, 12, 4));
			$thisfile_wavpack['crc2']          = getid3_lib::LittleEndian2Int(substr($WavPackChunkData, 16, 4));
			$thisfile_wavpack['extension']     =                              substr($WavPackChunkData, 20, 4);
			$thisfile_wavpack['extra_bc']      = getid3_lib::LittleEndian2Int(substr($WavPackChunkData, 24, 1));
			for ($i = 0; $i <= 2; $i++) {
				$thisfile_wavpack['extras'][]  = getid3_lib::LittleEndian2Int(substr($WavPackChunkData, 25 + $i, 1));
			}

// shortcut
			$thisfile_wavpack['flags'] = array();
			$thisfile_wavpack_flags = &$thisfile_wavpack['flags'];

$thisfile_wavpack_flags['mono']                 = (bool) ($thisfile_wavpack['flags_raw'] & 0x000001);
			$thisfile_wavpack_flags['fast_mode']            = (bool) ($thisfile_wavpack['flags_raw'] & 0x000002);
			$thisfile_wavpack_flags['raw_mode']             = (bool) ($thisfile_wavpack['flags_raw'] & 0x000004);
			$thisfile_wavpack_flags['calc_noise']           = (bool) ($thisfile_wavpack['flags_raw'] & 0x000008);
			$thisfile_wavpack_flags['high_quality']         = (bool) ($thisfile_wavpack['flags_raw'] & 0x000010);
			$thisfile_wavpack_flags['3_byte_samples']       = (bool) ($thisfile_wavpack['flags_raw'] & 0x000020);
			$thisfile_wavpack_flags['over_20_bits']         = (bool) ($thisfile_wavpack['flags_raw'] & 0x000040);
			$thisfile_wavpack_flags['use_wvc']              = (bool) ($thisfile_wavpack['flags_raw'] & 0x000080);
			$thisfile_wavpack_flags['noiseshaping']         = (bool) ($thisfile_wavpack['flags_raw'] & 0x000100);
			$thisfile_wavpack_flags['very_fast_mode']       = (bool) ($thisfile_wavpack['flags_raw'] & 0x000200);
			$thisfile_wavpack_flags['new_high_quality']     = (bool) ($thisfile_wavpack['flags_raw'] & 0x000400);
			$thisfile_wavpack_flags['cancel_extreme']       = (bool) ($thisfile_wavpack['flags_raw'] & 0x000800);
			$thisfile_wavpack_flags['cross_decorrelation']  = (bool) ($thisfile_wavpack['flags_raw'] & 0x001000);
			$thisfile_wavpack_flags['new_decorrelation']    = (bool) ($thisfile_wavpack['flags_raw'] & 0x002000);
			$thisfile_wavpack_flags['joint_stereo']         = (bool) ($thisfile_wavpack['flags_raw'] & 0x004000);
			$thisfile_wavpack_flags['extra_decorrelation']  = (bool) ($thisfile_wavpack['flags_raw'] & 0x008000);
			$thisfile_wavpack_flags['override_noiseshape']  = (bool) ($thisfile_wavpack['flags_raw'] & 0x010000);
			$thisfile_wavpack_flags['override_jointstereo'] = (bool) ($thisfile_wavpack['flags_raw'] & 0x020000);
			$thisfile_wavpack_flags['copy_source_filetime'] = (bool) ($thisfile_wavpack['flags_raw'] & 0x040000);
			$thisfile_wavpack_flags['create_exe']           = (bool) ($thisfile_wavpack['flags_raw'] & 0x080000);
		}

return true;
	}

/**
	 * @param string $BITMAPINFOHEADER
	 * @param bool   $littleEndian
	 *
	 * @return array
	 */
	public static function ParseBITMAPINFOHEADER($BITMAPINFOHEADER, $littleEndian=true) {

$parsed                    = array();
		$parsed['biSize']          = substr($BITMAPINFOHEADER,  0, 4); // number of bytes required by the BITMAPINFOHEADER structure
		$parsed['biWidth']         = substr($BITMAPINFOHEADER,  4, 4); // width of the bitmap in pixels
		$parsed['biHeight']        = substr($BITMAPINFOHEADER,  8, 4); // height of the bitmap in pixels. If biHeight is positive, the bitmap is a 'bottom-up' DIB and its origin is the lower left corner. If biHeight is negative, the bitmap is a 'top-down' DIB and its origin is the upper left corner
		$parsed['biPlanes']        = substr($BITMAPINFOHEADER, 12, 2); // number of color planes on the target device. In most cases this value must be set to 1
		$parsed['biBitCount']      = substr($BITMAPINFOHEADER, 14, 2); // Specifies the number of bits per pixels
		$parsed['biSizeImage']     = substr($BITMAPINFOHEADER, 20, 4); // size of the bitmap data section of the image (the actual pixel data, excluding BITMAPINFOHEADER and RGBQUAD structures)
		$parsed['biXPelsPerMeter'] = substr($BITMAPINFOHEADER, 24, 4); // horizontal resolution, in pixels per metre, of the target device
		$parsed['biYPelsPerMeter'] = substr($BITMAPINFOHEADER, 28, 4); // vertical resolution, in pixels per metre, of the target device
		$parsed['biClrUsed']       = substr($BITMAPINFOHEADER, 32, 4); // actual number of color indices in the color table used by the bitmap. If this value is zero, the bitmap uses the maximum number of colors corresponding to the value of the biBitCount member for the compression mode specified by biCompression
		$parsed['biClrImportant']  = substr($BITMAPINFOHEADER, 36, 4); // number of color indices that are considered important for displaying the bitmap. If this value is zero, all colors are important
		$parsed = array_map('getid3_lib::'.($littleEndian ? 'Little' : 'Big').'Endian2Int', $parsed);

$parsed['fourcc']          = substr($BITMAPINFOHEADER, 16, 4);  // compression identifier

return $parsed;
	}

/**
	 * @param string $DIVXTAG
	 * @param bool   $raw
	 *
	 * @return array
	 */
	public static function ParseDIVXTAG($DIVXTAG, $raw=false) {
		// structure from "IDivX" source, Form1.frm, by "Greg Frazier of Daemonic Software Group", email: gfrazier@icestorm.net, web: http://dsg.cjb.net/
		// source available at http://files.divx-digest.com/download/c663efe7ef8ad2e90bf4af4d3ea6188a/on0SWN2r/edit/IDivX.zip
		// 'Byte Layout:                   '1111111111111111
		// '32 for Movie - 1               '1111111111111111
		// '28 for Author - 6              '6666666666666666
		// '4  for year - 2                '6666666666662222
		// '3  for genre - 3               '7777777777777777
		// '48 for Comments - 7            '7777777777777777
		// '1  for Rating - 4              '7777777777777777
		// '5  for Future Additions - 0    '333400000DIVXTAG
		// '128 bytes total

static $DIVXTAGgenre  = array(
			 0 => 'Action',
			 1 => 'Action/Adventure',
			 2 => 'Adventure',
			 3 => 'Adult',
			 4 => 'Anime',
			 5 => 'Cartoon',
			 6 => 'Claymation',
			 7 => 'Comedy',
			 8 => 'Commercial',
			 9 => 'Documentary',
			10 => 'Drama',
			11 => 'Home Video',
			12 => 'Horror',
			13 => 'Infomercial',
			14 => 'Interactive',
			15 => 'Mystery',
			16 => 'Music Video',
			17 => 'Other',
			18 => 'Religion',
			19 => 'Sci Fi',
			20 => 'Thriller',
			21 => 'Western',
		),
		$DIVXTAGrating = array(
			 0 => 'Unrated',
			 1 => 'G',
			 2 => 'PG',
			 3 => 'PG-13',
			 4 => 'R',
			 5 => 'NC-17',
		);

$parsed              = array();
		$parsed['title']     =        trim(substr($DIVXTAG,   0, 32));
		$parsed['artist']    =        trim(substr($DIVXTAG,  32, 28));
		$parsed['year']      = intval(trim(substr($DIVXTAG,  60,  4)));
		$parsed['comment']   =        trim(substr($DIVXTAG,  64, 48));
		$parsed['genre_id']  = intval(trim(substr($DIVXTAG, 112,  3)));
		$parsed['rating_id'] =         ord(substr($DIVXTAG, 115,  1));
		//$parsed['padding'] =             substr($DIVXTAG, 116,  5);  // 5-byte null
		//$parsed['magic']   =             substr($DIVXTAG, 121,  7);  // "DIVXTAG"

$parsed['genre']  = (isset($DIVXTAGgenre[$parsed['genre_id']])   ? $DIVXTAGgenre[$parsed['genre_id']]   : $parsed['genre_id']);
		$parsed['rating'] = (isset($DIVXTAGrating[$parsed['rating_id']]) ? $DIVXTAGrating[$parsed['rating_id']] : $parsed['rating_id']);

if (!$raw) {
			unset($parsed['genre_id'], $parsed['rating_id']);
			foreach ($parsed as $key => $value) {
				if (empty($value)) {
					unset($parsed[$key]);
				}
			}
		}

foreach ($parsed as $tag => $value) {
			$parsed[$tag] = array($value);
		}

return $parsed;
	}

/**
	 * @param string $tagshortname
	 *
	 * @return string
	 */
	public static function waveSNDMtagLookup($tagshortname) {
		$begin = __LINE__;

/** This is not a comment!

©kwd	keywords
			©BPM	bpm
			©trt	tracktitle
			©des	description
			©gen	category
			©fin	featuredinstrument
			©LID	longid
			©bex	bwdescription
			©pub	publisher
			©cdt	cdtitle
			©alb	library
			©com	composer

return getid3_lib::EmbeddedLookup($tagshortname, $begin, __LINE__, __FILE__, 'riff-sndm');
	}

/**
	 * @param int $wFormatTag
	 *
	 * @return string
	 */
	public static function wFormatTagLookup($wFormatTag) {

$begin = __LINE__;

/** This is not a comment!

0x0000	Microsoft Unknown Wave Format
			0x0001	Pulse Code Modulation (PCM)
			0x0002	Microsoft ADPCM
			0x0003	IEEE Float
			0x0004	Compaq Computer VSELP
			0x0005	IBM CVSD
			0x0006	Microsoft A-Law
			0x0007	Microsoft mu-Law
			0x0008	Microsoft DTS
			0x0010	OKI ADPCM
			0x0011	Intel DVI/IMA ADPCM
			0x0012	Videologic MediaSpace ADPCM
			0x0013	Sierra Semiconductor ADPCM
			0x0014	Antex Electronics G.723 ADPCM
			0x0015	DSP Solutions DigiSTD
			0x0016	DSP Solutions DigiFIX
			0x0017	Dialogic OKI ADPCM
			0x0018	MediaVision ADPCM
			0x0019	Hewlett-Packard CU
			0x0020	Yamaha ADPCM
			0x0021	Speech Compression Sonarc
			0x0022	DSP Group TrueSpeech
			0x0023	Echo Speech EchoSC1
			0x0024	Audiofile AF36
			0x0025	Audio Processing Technology APTX
			0x0026	AudioFile AF10
			0x0027	Prosody 1612
			0x0028	LRC
			0x0030	Dolby AC2
			0x0031	Microsoft GSM 6.10
			0x0032	MSNAudio
			0x0033	Antex Electronics ADPCME
			0x0034	Control Resources VQLPC
			0x0035	DSP Solutions DigiREAL
			0x0036	DSP Solutions DigiADPCM
			0x0037	Control Resources CR10
			0x0038	Natural MicroSystems VBXADPCM
			0x0039	Crystal Semiconductor IMA ADPCM
			0x003A	EchoSC3
			0x003B	Rockwell ADPCM
			0x003C	Rockwell Digit LK
			0x003D	Xebec
			0x0040	Antex Electronics G.721 ADPCM
			0x0041	G.728 CELP
			0x0042	MSG723
			0x0050	MPEG Layer-2 or Layer-1
			0x0052	RT24
			0x0053	PAC
			0x0055	MPEG Layer-3
			0x0059	Lucent G.723
			0x0060	Cirrus
			0x0061	ESPCM
			0x0062	Voxware
			0x0063	Canopus Atrac
			0x0064	G.726 ADPCM
			0x0065	G.722 ADPCM
			0x0066	DSAT
			0x0067	DSAT Display
			0x0069	Voxware Byte Aligned
			0x0070	Voxware AC8
			0x0071	Voxware AC10
			0x0072	Voxware AC16
			0x0073	Voxware AC20
			0x0074	Voxware MetaVoice
			0x0075	Voxware MetaSound
			0x0076	Voxware RT29HW
			0x0077	Voxware VR12
			0x0078	Voxware VR18
			0x0079	Voxware TQ40
			0x0080	Softsound
			0x0081	Voxware TQ60
			0x0082	MSRT24
			0x0083	G.729A
			0x0084	MVI MV12
			0x0085	DF G.726
			0x0086	DF GSM610
			0x0088	ISIAudio
			0x0089	Onlive
			0x0091	SBC24
			0x0092	Dolby AC3 SPDIF
			0x0093	MediaSonic G.723
			0x0094	Aculab PLC    Prosody 8kbps
			0x0097	ZyXEL ADPCM
			0x0098	Philips LPCBB
			0x0099	Packed
			0x00FF	AAC
			0x0100	Rhetorex ADPCM
			0x0101	IBM mu-law
			0x0102	IBM A-law
			0x0103	IBM AVC Adaptive Differential Pulse Code Modulation (ADPCM)
			0x0111	Vivo G.723
			0x0112	Vivo Siren
			0x0123	Digital G.723
			0x0125	Sanyo LD ADPCM
			0x0130	Sipro Lab Telecom ACELP NET
			0x0131	Sipro Lab Telecom ACELP 4800
			0x0132	Sipro Lab Telecom ACELP 8V3
			0x0133	Sipro Lab Telecom G.729
			0x0134	Sipro Lab Telecom G.729A
			0x0135	Sipro Lab Telecom Kelvin
			0x0140	Windows Media Video V8
			0x0150	Qualcomm PureVoice
			0x0151	Qualcomm HalfRate
			0x0155	Ring Zero Systems TUB GSM
			0x0160	Microsoft Audio 1
			0x0161	Windows Media Audio V7 / V8 / V9
			0x0162	Windows Media Audio Professional V9
			0x0163	Windows Media Audio Lossless V9
			0x0200	Creative Labs ADPCM
			0x0202	Creative Labs Fastspeech8
			0x0203	Creative Labs Fastspeech10
			0x0210	UHER Informatic GmbH ADPCM
			0x0220	Quarterdeck
			0x0230	I-link Worldwide VC
			0x0240	Aureal RAW Sport
			0x0250	Interactive Products HSX
			0x0251	Interactive Products RPELP
			0x0260	Consistent Software CS2
			0x0270	Sony SCX
			0x0300	Fujitsu FM Towns Snd
			0x0400	BTV Digital
			0x0401	Intel Music Coder
			0x0450	QDesign Music
			0x0680	VME VMPCM
			0x0681	AT&T Labs TPC
			0x08AE	ClearJump LiteWave
			0x1000	Olivetti GSM
			0x1001	Olivetti ADPCM
			0x1002	Olivetti CELP
			0x1003	Olivetti SBC
			0x1004	Olivetti OPR
			0x1100	Lernout & Hauspie Codec (0x1100)
			0x1101	Lernout & Hauspie CELP Codec (0x1101)
			0x1102	Lernout & Hauspie SBC Codec (0x1102)
			0x1103	Lernout & Hauspie SBC Codec (0x1103)
			0x1104	Lernout & Hauspie SBC Codec (0x1104)
			0x1400	Norris
			0x1401	AT&T ISIAudio
			0x1500	Soundspace Music Compression
			0x181C	VoxWare RT24 Speech
			0x1FC4	NCT Soft ALF2CD (www.nctsoft.com)
			0x2000	Dolby AC3
			0x2001	Dolby DTS
			0x2002	WAVE_FORMAT_14_4
			0x2003	WAVE_FORMAT_28_8
			0x2004	WAVE_FORMAT_COOK
			0x2005	WAVE_FORMAT_DNET
			0x674F	Ogg Vorbis 1
			0x6750	Ogg Vorbis 2
			0x6751	Ogg Vorbis 3
			0x676F	Ogg Vorbis 1+
			0x6770	Ogg Vorbis 2+
			0x6771	Ogg Vorbis 3+
			0x7A21	GSM-AMR (CBR, no SID)
			0x7A22	GSM-AMR (VBR, including SID)
			0xFFFE	WAVE_FORMAT_EXTENSIBLE
			0xFFFF	WAVE_FORMAT_DEVELOPMENT

return getid3_lib::EmbeddedLookup('0x'.str_pad(strtoupper(dechex($wFormatTag)), 4, '0', STR_PAD_LEFT), $begin, __LINE__, __FILE__, 'riff-wFormatTag');
	}

/**
	 * @param string $fourcc
	 *
	 * @return string
	 */
	public static function fourccLookup($fourcc) {

$begin = __LINE__;

/** This is not a comment!

swot	http://developer.apple.com/qa/snd/snd07.html
			____	No Codec (____)
			_BIT	BI_BITFIELDS (Raw RGB)
			_JPG	JPEG compressed
			_PNG	PNG compressed W3C/ISO/IEC (RFC-2083)
			_RAW	Full Frames (Uncompressed)
			_RGB	Raw RGB Bitmap
			_RL4	RLE 4bpp RGB
			_RL8	RLE 8bpp RGB
			3IV1	3ivx MPEG-4 v1
			3IV2	3ivx MPEG-4 v2
			3IVX	3ivx MPEG-4
			AASC	Autodesk Animator
			ABYR	Kensington ?ABYR?
			AEMI	Array Microsystems VideoONE MPEG1-I Capture
			AFLC	Autodesk Animator FLC
			AFLI	Autodesk Animator FLI
			AMPG	Array Microsystems VideoONE MPEG
			ANIM	Intel RDX (ANIM)
			AP41	AngelPotion Definitive
			ASV1	Asus Video v1
			ASV2	Asus Video v2
			ASVX	Asus Video 2.0 (audio)
			AUR2	AuraVision Aura 2 Codec - YUV 4:2:2
			AURA	AuraVision Aura 1 Codec - YUV 4:1:1
			AVDJ	Independent JPEG Group\'s codec (AVDJ)
			AVRN	Independent JPEG Group\'s codec (AVRN)
			AYUV	4:4:4 YUV (AYUV)
			AZPR	Quicktime Apple Video (AZPR)
			BGR 	Raw RGB32
			BLZ0	Blizzard DivX MPEG-4
			BTVC	Conexant Composite Video
			BINK	RAD Game Tools Bink Video
			BT20	Conexant Prosumer Video
			BTCV	Conexant Composite Video Codec
			BW10	Data Translation Broadway MPEG Capture
			CC12	Intel YUV12
			CDVC	Canopus DV
			CFCC	Digital Processing Systems DPS Perception
			CGDI	Microsoft Office 97 Camcorder Video
			CHAM	Winnov Caviara Champagne
			CJPG	Creative WebCam JPEG
			CLJR	Cirrus Logic YUV 4:1:1
			CMYK	Common Data Format in Printing (Colorgraph)
			CPLA	Weitek 4:2:0 YUV Planar
			CRAM	Microsoft Video 1 (CRAM)
			cvid	Radius Cinepak
			CVID	Radius Cinepak
			CWLT	Microsoft Color WLT DIB
			CYUV	Creative Labs YUV
			CYUY	ATI YUV
			D261	H.261
			D263	H.263
			DIB 	Device Independent Bitmap
			DIV1	FFmpeg OpenDivX
			DIV2	Microsoft MPEG-4 v1/v2
			DIV3	DivX ;-) MPEG-4 v3.x Low-Motion
			DIV4	DivX ;-) MPEG-4 v3.x Fast-Motion
			DIV5	DivX MPEG-4 v5.x
			DIV6	DivX ;-) (MS MPEG-4 v3.x)
			DIVX	DivX MPEG-4 v4 (OpenDivX / Project Mayo)
			divx	DivX MPEG-4
			DMB1	Matrox Rainbow Runner hardware MJPEG
			DMB2	Paradigm MJPEG
			DSVD	?DSVD?
			DUCK	Duck TrueMotion 1.0
			DPS0	DPS/Leitch Reality Motion JPEG
			DPSC	DPS/Leitch PAR Motion JPEG
			DV25	Matrox DVCPRO codec
			DV50	Matrox DVCPRO50 codec
			DVC 	IEC 61834 and SMPTE 314M (DVC/DV Video)
			DVCP	IEC 61834 and SMPTE 314M (DVC/DV Video)
			DVHD	IEC Standard DV 1125 lines @ 30fps / 1250 lines @ 25fps
			DVMA	Darim Vision DVMPEG (dummy for MPEG compressor) (www.darvision.com)
			DVSL	IEC Standard DV compressed in SD (SDL)
			DVAN	?DVAN?
			DVE2	InSoft DVE-2 Videoconferencing
			dvsd	IEC 61834 and SMPTE 314M DVC/DV Video
			DVSD	IEC 61834 and SMPTE 314M DVC/DV Video
			DVX1	Lucent DVX1000SP Video Decoder
			DVX2	Lucent DVX2000S Video Decoder
			DVX3	Lucent DVX3000S Video Decoder
			DX50	DivX v5
			DXT1	Microsoft DirectX Compressed Texture (DXT1)
			DXT2	Microsoft DirectX Compressed Texture (DXT2)
			DXT3	Microsoft DirectX Compressed Texture (DXT3)
			DXT4	Microsoft DirectX Compressed Texture (DXT4)
			DXT5	Microsoft DirectX Compressed Texture (DXT5)
			DXTC	Microsoft DirectX Compressed Texture (DXTC)
			DXTn	Microsoft DirectX Compressed Texture (DXTn)
			EM2V	Etymonix MPEG-2 I-frame (www.etymonix.com)
			EKQ0	Elsa ?EKQ0?
			ELK0	Elsa ?ELK0?
			ESCP	Eidos Escape
			ETV1	eTreppid Video ETV1
			ETV2	eTreppid Video ETV2
			ETVC	eTreppid Video ETVC
			FLIC	Autodesk FLI/FLC Animation
			FLV1	Sorenson Spark
			FLV4	On2 TrueMotion VP6
			FRWT	Darim Vision Forward Motion JPEG (www.darvision.com)
			FRWU	Darim Vision Forward Uncompressed (www.darvision.com)
			FLJP	D-Vision Field Encoded Motion JPEG
			FPS1	FRAPS v1
			FRWA	SoftLab-Nsk Forward Motion JPEG w/ alpha channel
			FRWD	SoftLab-Nsk Forward Motion JPEG
			FVF1	Iterated Systems Fractal Video Frame
			GLZW	Motion LZW (gabest@freemail.hu)
			GPEG	Motion JPEG (gabest@freemail.hu)
			GWLT	Microsoft Greyscale WLT DIB
			H260	Intel ITU H.260 Videoconferencing
			H261	Intel ITU H.261 Videoconferencing
			H262	Intel ITU H.262 Videoconferencing
			H263	Intel ITU H.263 Videoconferencing
			H264	Intel ITU H.264 Videoconferencing
			H265	Intel ITU H.265 Videoconferencing
			H266	Intel ITU H.266 Videoconferencing
			H267	Intel ITU H.267 Videoconferencing
			H268	Intel ITU H.268 Videoconferencing
			H269	Intel ITU H.269 Videoconferencing
			HFYU	Huffman Lossless Codec
			HMCR	Rendition Motion Compensation Format (HMCR)
			HMRR	Rendition Motion Compensation Format (HMRR)
			I263	FFmpeg I263 decoder
			IF09	Indeo YVU9 ("YVU9 with additional delta-frame info after the U plane")
			IUYV	Interlaced version of UYVY (www.leadtools.com)
			IY41	Interlaced version of Y41P (www.leadtools.com)
			IYU1	12 bit format used in mode 2 of the IEEE 1394 Digital Camera 1.04 spec    IEEE standard
			IYU2	24 bit format used in mode 2 of the IEEE 1394 Digital Camera 1.04 spec    IEEE standard
			IYUV	Planar YUV format (8-bpp Y plane, followed by 8-bpp 2×2 U and V planes)
			i263	Intel ITU H.263 Videoconferencing (i263)
			I420	Intel Indeo 4
			IAN 	Intel Indeo 4 (RDX)
			ICLB	InSoft CellB Videoconferencing
			IGOR	Power DVD
			IJPG	Intergraph JPEG
			ILVC	Intel Layered Video
			ILVR	ITU-T H.263+
			IPDV	I-O Data Device Giga AVI DV Codec
			IR21	Intel Indeo 2.1
			IRAW	Intel YUV Uncompressed
			IV30	Intel Indeo 3.0
			IV31	Intel Indeo 3.1
			IV32	Ligos Indeo 3.2
			IV33	Ligos Indeo 3.3
			IV34	Ligos Indeo 3.4
			IV35	Ligos Indeo 3.5
			IV36	Ligos Indeo 3.6
			IV37	Ligos Indeo 3.7
			IV38	Ligos Indeo 3.8
			IV39	Ligos Indeo 3.9
			IV40	Ligos Indeo Interactive 4.0
			IV41	Ligos Indeo Interactive 4.1
			IV42	Ligos Indeo Interactive 4.2
			IV43	Ligos Indeo Interactive 4.3
			IV44	Ligos Indeo Interactive 4.4
			IV45	Ligos Indeo Interactive 4.5
			IV46	Ligos Indeo Interactive 4.6
			IV47	Ligos Indeo Interactive 4.7
			IV48	Ligos Indeo Interactive 4.8
			IV49	Ligos Indeo Interactive 4.9
			IV50	Ligos Indeo Interactive 5.0
			JBYR	Kensington ?JBYR?
			JPEG	Still Image JPEG DIB
			JPGL	Pegasus Lossless Motion JPEG
			KMVC	Team17 Software Karl Morton\'s Video Codec
			LSVM	Vianet Lighting Strike Vmail (Streaming) (www.vianet.com)
			LEAD	LEAD Video Codec
			Ljpg	LEAD MJPEG Codec
			MDVD	Alex MicroDVD Video (hacked MS MPEG-4) (www.tiasoft.de)
			MJPA	Morgan Motion JPEG (MJPA) (www.morgan-multimedia.com)
			MJPB	Morgan Motion JPEG (MJPB) (www.morgan-multimedia.com)
			MMES	Matrox MPEG-2 I-frame
			MP2v	Microsoft S-Mpeg 4 version 1 (MP2v)
			MP42	Microsoft S-Mpeg 4 version 2 (MP42)
			MP43	Microsoft S-Mpeg 4 version 3 (MP43)
			MP4S	Microsoft S-Mpeg 4 version 3 (MP4S)
			MP4V	FFmpeg MPEG-4
			MPG1	FFmpeg MPEG 1/2
			MPG2	FFmpeg MPEG 1/2
			MPG3	FFmpeg DivX ;-) (MS MPEG-4 v3)
			MPG4	Microsoft MPEG-4
			MPGI	Sigma Designs MPEG
			MPNG	PNG images decoder
			MSS1	Microsoft Windows Screen Video
			MSZH	LCL (Lossless Codec Library) (www.geocities.co.jp/Playtown-Denei/2837/LRC.htm)
			M261	Microsoft H.261
			M263	Microsoft H.263
			M4S2	Microsoft Fully Compliant MPEG-4 v2 simple profile (M4S2)
			m4s2	Microsoft Fully Compliant MPEG-4 v2 simple profile (m4s2)
			MC12	ATI Motion Compensation Format (MC12)
			MCAM	ATI Motion Compensation Format (MCAM)
			MJ2C	Morgan Multimedia Motion JPEG2000
			mJPG	IBM Motion JPEG w/ Huffman Tables
			MJPG	Microsoft Motion JPEG DIB
			MP42	Microsoft MPEG-4 (low-motion)
			MP43	Microsoft MPEG-4 (fast-motion)
			MP4S	Microsoft MPEG-4 (MP4S)
			mp4s	Microsoft MPEG-4 (mp4s)
			MPEG	Chromatic Research MPEG-1 Video I-Frame
			MPG4	Microsoft MPEG-4 Video High Speed Compressor
			MPGI	Sigma Designs MPEG
			MRCA	FAST Multimedia Martin Regen Codec
			MRLE	Microsoft Run Length Encoding
			MSVC	Microsoft Video 1
			MTX1	Matrox ?MTX1?
			MTX2	Matrox ?MTX2?
			MTX3	Matrox ?MTX3?
			MTX4	Matrox ?MTX4?
			MTX5	Matrox ?MTX5?
			MTX6	Matrox ?MTX6?
			MTX7	Matrox ?MTX7?
			MTX8	Matrox ?MTX8?
			MTX9	Matrox ?MTX9?
			MV12	Motion Pixels Codec (old)
			MWV1	Aware Motion Wavelets
			nAVI	SMR Codec (hack of Microsoft MPEG-4) (IRC #shadowrealm)
			NT00	NewTek LightWave HDTV YUV w/ Alpha (www.newtek.com)
			NUV1	NuppelVideo
			NTN1	Nogatech Video Compression 1
			NVS0	nVidia GeForce Texture (NVS0)
			NVS1	nVidia GeForce Texture (NVS1)
			NVS2	nVidia GeForce Texture (NVS2)
			NVS3	nVidia GeForce Texture (NVS3)
			NVS4	nVidia GeForce Texture (NVS4)
			NVS5	nVidia GeForce Texture (NVS5)
			NVT0	nVidia GeForce Texture (NVT0)
			NVT1	nVidia GeForce Texture (NVT1)
			NVT2	nVidia GeForce Texture (NVT2)
			NVT3	nVidia GeForce Texture (NVT3)
			NVT4	nVidia GeForce Texture (NVT4)
			NVT5	nVidia GeForce Texture (NVT5)
			PIXL	MiroXL, Pinnacle PCTV
			PDVC	I-O Data Device Digital Video Capture DV codec
			PGVV	Radius Video Vision
			PHMO	IBM Photomotion
			PIM1	MPEG Realtime (Pinnacle Cards)
			PIM2	Pegasus Imaging ?PIM2?
			PIMJ	Pegasus Imaging Lossless JPEG
			PVEZ	Horizons Technology PowerEZ
			PVMM	PacketVideo Corporation MPEG-4
			PVW2	Pegasus Imaging Wavelet Compression
			Q1.0	Q-Team\'s QPEG 1.0 (www.q-team.de)
			Q1.1	Q-Team\'s QPEG 1.1 (www.q-team.de)
			QPEG	Q-Team QPEG 1.0
			qpeq	Q-Team QPEG 1.1
			RGB 	Raw BGR32
			RGBA	Raw RGB w/ Alpha
			RMP4	REALmagic MPEG-4 (unauthorized XVID copy) (www.sigmadesigns.com)
			ROQV	Id RoQ File Video Decoder
			RPZA	Quicktime Apple Video (RPZA)
			RUD0	Rududu video codec (http://rududu.ifrance.com/rududu/)
			RV10	RealVideo 1.0 (aka RealVideo 5.0)
			RV13	RealVideo 1.0 (RV13)
			RV20	RealVideo G2
			RV30	RealVideo 8
			RV40	RealVideo 9
			RGBT	Raw RGB w/ Transparency
			RLE 	Microsoft Run Length Encoder
			RLE4	Run Length Encoded (4bpp, 16-color)
			RLE8	Run Length Encoded (8bpp, 256-color)
			RT21	Intel Indeo RealTime Video 2.1
			rv20	RealVideo G2
			rv30	RealVideo 8
			RVX 	Intel RDX (RVX )
			SMC 	Apple Graphics (SMC )
			SP54	Logitech Sunplus Sp54 Codec for Mustek GSmart Mini 2
			SPIG	Radius Spigot
			SVQ3	Sorenson Video 3 (Apple Quicktime 5)
			s422	Tekram VideoCap C210 YUV 4:2:2
			SDCC	Sun Communication Digital Camera Codec
			SFMC	CrystalNet Surface Fitting Method
			SMSC	Radius SMSC
			SMSD	Radius SMSD
			smsv	WorldConnect Wavelet Video
			SPIG	Radius Spigot
			SPLC	Splash Studios ACM Audio Codec (www.splashstudios.net)
			SQZ2	Microsoft VXTreme Video Codec V2
			STVA	ST Microelectronics CMOS Imager Data (Bayer)
			STVB	ST Microelectronics CMOS Imager Data (Nudged Bayer)
			STVC	ST Microelectronics CMOS Imager Data (Bunched)
			STVX	ST Microelectronics CMOS Imager Data (Extended CODEC Data Format)
			STVY	ST Microelectronics CMOS Imager Data (Extended CODEC Data Format with Correction Data)
			SV10	Sorenson Video R1
			SVQ1	Sorenson Video
			T420	Toshiba YUV 4:2:0
			TM2A	Duck TrueMotion Archiver 2.0 (www.duck.com)
			TVJP	Pinnacle/Truevision Targa 2000 board (TVJP)
			TVMJ	Pinnacle/Truevision Targa 2000 board (TVMJ)
			TY0N	Tecomac Low-Bit Rate Codec (www.tecomac.com)
			TY2C	Trident Decompression Driver
			TLMS	TeraLogic Motion Intraframe Codec (TLMS)
			TLST	TeraLogic Motion Intraframe Codec (TLST)
			TM20	Duck TrueMotion 2.0
			TM2X	Duck TrueMotion 2X
			TMIC	TeraLogic Motion Intraframe Codec (TMIC)
			TMOT	Horizons Technology TrueMotion S
			tmot	Horizons TrueMotion Video Compression
			TR20	Duck TrueMotion RealTime 2.0
			TSCC	TechSmith Screen Capture Codec
			TV10	Tecomac Low-Bit Rate Codec
			TY2N	Trident ?TY2N?
			U263	UB Video H.263/H.263+/H.263++ Decoder
			UMP4	UB Video MPEG 4 (www.ubvideo.com)
			UYNV	Nvidia UYVY packed 4:2:2
			UYVP	Evans & Sutherland YCbCr 4:2:2 extended precision
			UCOD	eMajix.com ClearVideo
			ULTI	IBM Ultimotion
			UYVY	UYVY packed 4:2:2
			V261	Lucent VX2000S
			VIFP	VFAPI Reader Codec (www.yks.ne.jp/~hori/)
			VIV1	FFmpeg H263+ decoder
			VIV2	Vivo H.263
			VQC2	Vector-quantised codec 2 (research) http://eprints.ecs.soton.ac.uk/archive/00001310/01/VTC97-js.pdf)
			VTLP	Alaris VideoGramPiX
			VYU9	ATI YUV (VYU9)
			VYUY	ATI YUV (VYUY)
			V261	Lucent VX2000S
			V422	Vitec Multimedia 24-bit YUV 4:2:2 Format
			V655	Vitec Multimedia 16-bit YUV 4:2:2 Format
			VCR1	ATI Video Codec 1
			VCR2	ATI Video Codec 2
			VCR3	ATI VCR 3.0
			VCR4	ATI VCR 4.0
			VCR5	ATI VCR 5.0
			VCR6	ATI VCR 6.0
			VCR7	ATI VCR 7.0
			VCR8	ATI VCR 8.0
			VCR9	ATI VCR 9.0
			VDCT	Vitec Multimedia Video Maker Pro DIB
			VDOM	VDOnet VDOWave
			VDOW	VDOnet VDOLive (H.263)
			VDTZ	Darim Vison VideoTizer YUV
			VGPX	Alaris VideoGramPiX
			VIDS	Vitec Multimedia YUV 4:2:2 CCIR 601 for V422
			VIVO	Vivo H.263 v2.00
			vivo	Vivo H.263
			VIXL	Miro/Pinnacle Video XL
			VLV1	VideoLogic/PURE Digital Videologic Capture
			VP30	On2 VP3.0
			VP31	On2 VP3.1
			VP6F	On2 TrueMotion VP6
			VX1K	Lucent VX1000S Video Codec
			VX2K	Lucent VX2000S Video Codec
			VXSP	Lucent VX1000SP Video Codec
			WBVC	Winbond W9960
			WHAM	Microsoft Video 1 (WHAM)
			WINX	Winnov Software Compression
			WJPG	AverMedia Winbond JPEG
			WMV1	Windows Media Video V7
			WMV2	Windows Media Video V8
			WMV3	Windows Media Video V9
			WNV1	Winnov Hardware Compression
			XYZP	Extended PAL format XYZ palette (www.riff.org)
			x263	Xirlink H.263
			XLV0	NetXL Video Decoder
			XMPG	Xing MPEG (I-Frame only)
			XVID	XviD MPEG-4 (www.xvid.org)
			XXAN	?XXAN?
			YU92	Intel YUV (YU92)
			YUNV	Nvidia Uncompressed YUV 4:2:2
			YUVP	Extended PAL format YUV palette (www.riff.org)
			Y211	YUV 2:1:1 Packed
			Y411	YUV 4:1:1 Packed
			Y41B	Weitek YUV 4:1:1 Planar
			Y41P	Brooktree PC1 YUV 4:1:1 Packed
			Y41T	Brooktree PC1 YUV 4:1:1 with transparency
			Y42B	Weitek YUV 4:2:2 Planar
			Y42T	Brooktree UYUV 4:2:2 with transparency
			Y422	ADS Technologies Copy of UYVY used in Pyro WebCam firewire camera
			Y800	Simple, single Y plane for monochrome images
			Y8  	Grayscale video
			YC12	Intel YUV 12 codec
			YUV8	Winnov Caviar YUV8
			YUV9	Intel YUV9
			YUY2	Uncompressed YUV 4:2:2
			YUYV	Canopus YUV
			YV12	YVU12 Planar
			YVU9	Intel YVU9 Planar (8-bpp Y plane, followed by 8-bpp 4x4 U and V planes)
			YVYU	YVYU 4:2:2 Packed
			ZLIB	Lossless Codec Library zlib compression (www.geocities.co.jp/Playtown-Denei/2837/LRC.htm)
			ZPEG	Metheus Video Zipper

return getid3_lib::EmbeddedLookup($fourcc, $begin, __LINE__, __FILE__, 'riff-fourcc');
	}

/**
	 * @param string $byteword
	 * @param bool   $signed
	 *
	 * @return int|float|false
	 */
	private function EitherEndian2Int($byteword, $signed=false) {
		if ($this->container == 'riff') {
			return getid3_lib::LittleEndian2Int($byteword, $signed);
		}
		return getid3_lib::BigEndian2Int($byteword, false, $signed);
	}

}
�����������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������module.audio-video.asf.php��������������������������������������������������������������������������0000644�����������������00000413157�15150061000�0011515 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������<?php
/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org>               //
//  available at https://github.com/JamesHeinrich/getID3       //
//            or https://www.getid3.org                        //
//            or http://getid3.sourceforge.net                 //
//  see readme.txt for more details                            //
/////////////////////////////////////////////////////////////////
//                                                             //
// module.audio-video.asf.php                                  //
// module for analyzing ASF, WMA and WMV files                 //
// dependencies: module.audio-video.riff.php                   //
//                                                            ///
/////////////////////////////////////////////////////////////////

class getid3_asf extends getid3_handler
{
	protected static $ASFIndexParametersObjectIndexSpecifiersIndexTypes = array(
		1 => 'Nearest Past Data Packet',
		2 => 'Nearest Past Media Object',
		3 => 'Nearest Past Cleanpoint'
	);

protected static $ASFMediaObjectIndexParametersObjectIndexSpecifiersIndexTypes = array(
		1 => 'Nearest Past Data Packet',
		2 => 'Nearest Past Media Object',
		3 => 'Nearest Past Cleanpoint',
		0xFF => 'Frame Number Offset'
	);

protected static $ASFTimecodeIndexParametersObjectIndexSpecifiersIndexTypes = array(
		2 => 'Nearest Past Media Object',
		3 => 'Nearest Past Cleanpoint'
	);

/**
	 * @param getID3 $getid3
	 */
	public function __construct(getID3 $getid3) {
		parent::__construct($getid3);  // extends getid3_handler::__construct()

// initialize all GUID constants
		$GUIDarray = $this->KnownGUIDs();
		foreach ($GUIDarray as $GUIDname => $hexstringvalue) {
			if (!defined($GUIDname)) {
				define($GUIDname, $this->GUIDtoBytestring($hexstringvalue));
			}
		}
	}

/**
	 * @return bool
	 */
	public function Analyze() {
		$info = &$this->getid3->info;

// Shortcuts
		$thisfile_audio = &$info['audio'];
		$thisfile_video = &$info['video'];
		$info['asf']  = array();
		$thisfile_asf = &$info['asf'];
		$thisfile_asf['comments'] = array();
		$thisfile_asf_comments    = &$thisfile_asf['comments'];
		$thisfile_asf['header_object'] = array();
		$thisfile_asf_headerobject     = &$thisfile_asf['header_object'];

// ASF structure:
		// * Header Object [required]
		//   * File Properties Object [required]   (global file attributes)
		//   * Stream Properties Object [required] (defines media stream & characteristics)
		//   * Header Extension Object [required]  (additional functionality)
		//   * Content Description Object          (bibliographic information)
		//   * Script Command Object               (commands for during playback)
		//   * Marker Object                       (named jumped points within the file)
		// * Data Object [required]
		//   * Data Packets
		// * Index Object

// Header Object: (mandatory, one only)
		// Field Name                   Field Type   Size (bits)
		// Object ID                    GUID         128             // GUID for header object - GETID3_ASF_Header_Object
		// Object Size                  QWORD        64              // size of header object, including 30 bytes of Header Object header
		// Number of Header Objects     DWORD        32              // number of objects in header object
		// Reserved1                    BYTE         8               // hardcoded: 0x01
		// Reserved2                    BYTE         8               // hardcoded: 0x02

$info['fileformat'] = 'asf';

$this->fseek($info['avdataoffset']);
		$HeaderObjectData = $this->fread(30);

$thisfile_asf_headerobject['objectid']      = substr($HeaderObjectData, 0, 16);
		$thisfile_asf_headerobject['objectid_guid'] = $this->BytestringToGUID($thisfile_asf_headerobject['objectid']);
		if ($thisfile_asf_headerobject['objectid'] != GETID3_ASF_Header_Object) {
			unset($info['fileformat'], $info['asf']);
			return $this->error('ASF header GUID {'.$this->BytestringToGUID($thisfile_asf_headerobject['objectid']).'} does not match expected "GETID3_ASF_Header_Object" GUID {'.$this->BytestringToGUID(GETID3_ASF_Header_Object).'}');
		}
		$thisfile_asf_headerobject['objectsize']    = getid3_lib::LittleEndian2Int(substr($HeaderObjectData, 16, 8));
		$thisfile_asf_headerobject['headerobjects'] = getid3_lib::LittleEndian2Int(substr($HeaderObjectData, 24, 4));
		$thisfile_asf_headerobject['reserved1']     = getid3_lib::LittleEndian2Int(substr($HeaderObjectData, 28, 1));
		$thisfile_asf_headerobject['reserved2']     = getid3_lib::LittleEndian2Int(substr($HeaderObjectData, 29, 1));

$NextObjectOffset = $this->ftell();
		$ASFHeaderData = $this->fread($thisfile_asf_headerobject['objectsize'] - 30);
		$offset = 0;
		$thisfile_asf_streambitratepropertiesobject = array();
		$thisfile_asf_codeclistobject = array();
		$StreamPropertiesObjectData = array();

for ($HeaderObjectsCounter = 0; $HeaderObjectsCounter < $thisfile_asf_headerobject['headerobjects']; $HeaderObjectsCounter++) {
			$NextObjectGUID = substr($ASFHeaderData, $offset, 16);
			$offset += 16;
			$NextObjectGUIDtext = $this->BytestringToGUID($NextObjectGUID);
			$NextObjectSize = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 8));
			$offset += 8;
			switch ($NextObjectGUID) {

case GETID3_ASF_File_Properties_Object:
					// File Properties Object: (mandatory, one only)
					// Field Name                   Field Type   Size (bits)
					// Object ID                    GUID         128             // GUID for file properties object - GETID3_ASF_File_Properties_Object
					// Object Size                  QWORD        64              // size of file properties object, including 104 bytes of File Properties Object header
					// File ID                      GUID         128             // unique ID - identical to File ID in Data Object
					// File Size                    QWORD        64              // entire file in bytes. Invalid if Broadcast Flag == 1
					// Creation Date                QWORD        64              // date & time of file creation. Maybe invalid if Broadcast Flag == 1
					// Data Packets Count           QWORD        64              // number of data packets in Data Object. Invalid if Broadcast Flag == 1
					// Play Duration                QWORD        64              // playtime, in 100-nanosecond units. Invalid if Broadcast Flag == 1
					// Send Duration                QWORD        64              // time needed to send file, in 100-nanosecond units. Players can ignore this value. Invalid if Broadcast Flag == 1
					// Preroll                      QWORD        64              // time to buffer data before starting to play file, in 1-millisecond units. If <> 0, PlayDuration and PresentationTime have been offset by this amount
					// Flags                        DWORD        32              //
					// * Broadcast Flag             bits         1  (0x01)       // file is currently being written, some header values are invalid
					// * Seekable Flag              bits         1  (0x02)       // is file seekable
					// * Reserved                   bits         30 (0xFFFFFFFC) // reserved - set to zero
					// Minimum Data Packet Size     DWORD        32              // in bytes. should be same as Maximum Data Packet Size. Invalid if Broadcast Flag == 1
					// Maximum Data Packet Size     DWORD        32              // in bytes. should be same as Minimum Data Packet Size. Invalid if Broadcast Flag == 1
					// Maximum Bitrate              DWORD        32              // maximum instantaneous bitrate in bits per second for entire file, including all data streams and ASF overhead

// shortcut
					$thisfile_asf['file_properties_object'] = array();
					$thisfile_asf_filepropertiesobject      = &$thisfile_asf['file_properties_object'];

$thisfile_asf_filepropertiesobject['offset']             = $NextObjectOffset + $offset;
					$thisfile_asf_filepropertiesobject['objectid']           = $NextObjectGUID;
					$thisfile_asf_filepropertiesobject['objectid_guid']      = $NextObjectGUIDtext;
					$thisfile_asf_filepropertiesobject['objectsize']         = $NextObjectSize;
					$thisfile_asf_filepropertiesobject['fileid']             = substr($ASFHeaderData, $offset, 16);
					$offset += 16;
					$thisfile_asf_filepropertiesobject['fileid_guid']        = $this->BytestringToGUID($thisfile_asf_filepropertiesobject['fileid']);
					$thisfile_asf_filepropertiesobject['filesize']           = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 8));
					$offset += 8;
					$thisfile_asf_filepropertiesobject['creation_date']      = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 8));
					$thisfile_asf_filepropertiesobject['creation_date_unix'] = $this->FILETIMEtoUNIXtime($thisfile_asf_filepropertiesobject['creation_date']);
					$offset += 8;
					$thisfile_asf_filepropertiesobject['data_packets']       = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 8));
					$offset += 8;
					$thisfile_asf_filepropertiesobject['play_duration']      = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 8));
					$offset += 8;
					$thisfile_asf_filepropertiesobject['send_duration']      = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 8));
					$offset += 8;
					$thisfile_asf_filepropertiesobject['preroll']            = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 8));
					$offset += 8;
					$thisfile_asf_filepropertiesobject['flags_raw']          = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
					$offset += 4;
					$thisfile_asf_filepropertiesobject['flags']['broadcast'] = (bool) ($thisfile_asf_filepropertiesobject['flags_raw'] & 0x0001);
					$thisfile_asf_filepropertiesobject['flags']['seekable']  = (bool) ($thisfile_asf_filepropertiesobject['flags_raw'] & 0x0002);

$thisfile_asf_filepropertiesobject['min_packet_size']    = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
					$offset += 4;
					$thisfile_asf_filepropertiesobject['max_packet_size']    = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
					$offset += 4;
					$thisfile_asf_filepropertiesobject['max_bitrate']        = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
					$offset += 4;

if ($thisfile_asf_filepropertiesobject['flags']['broadcast']) {

// broadcast flag is set, some values invalid
						unset($thisfile_asf_filepropertiesobject['filesize']);
						unset($thisfile_asf_filepropertiesobject['data_packets']);
						unset($thisfile_asf_filepropertiesobject['play_duration']);
						unset($thisfile_asf_filepropertiesobject['send_duration']);
						unset($thisfile_asf_filepropertiesobject['min_packet_size']);
						unset($thisfile_asf_filepropertiesobject['max_packet_size']);

} else {

// broadcast flag NOT set, perform calculations
						$info['playtime_seconds'] = ($thisfile_asf_filepropertiesobject['play_duration'] / 10000000) - ($thisfile_asf_filepropertiesobject['preroll'] / 1000);

//$info['bitrate'] = $thisfile_asf_filepropertiesobject['max_bitrate'];
						$info['bitrate'] = getid3_lib::SafeDiv($thisfile_asf_filepropertiesobject['filesize'] * 8, $info['playtime_seconds']);
					}
					break;

case GETID3_ASF_Stream_Properties_Object:
					// Stream Properties Object: (mandatory, one per media stream)
					// Field Name                   Field Type   Size (bits)
					// Object ID                    GUID         128             // GUID for stream properties object - GETID3_ASF_Stream_Properties_Object
					// Object Size                  QWORD        64              // size of stream properties object, including 78 bytes of Stream Properties Object header
					// Stream Type                  GUID         128             // GETID3_ASF_Audio_Media, GETID3_ASF_Video_Media or GETID3_ASF_Command_Media
					// Error Correction Type        GUID         128             // GETID3_ASF_Audio_Spread for audio-only streams, GETID3_ASF_No_Error_Correction for other stream types
					// Time Offset                  QWORD        64              // 100-nanosecond units. typically zero. added to all timestamps of samples in the stream
					// Type-Specific Data Length    DWORD        32              // number of bytes for Type-Specific Data field
					// Error Correction Data Length DWORD        32              // number of bytes for Error Correction Data field
					// Flags                        WORD         16              //
					// * Stream Number              bits         7 (0x007F)      // number of this stream.  1 <= valid <= 127
					// * Reserved                   bits         8 (0x7F80)      // reserved - set to zero
					// * Encrypted Content Flag     bits         1 (0x8000)      // stream contents encrypted if set
					// Reserved                     DWORD        32              // reserved - set to zero
					// Type-Specific Data           BYTESTREAM   variable        // type-specific format data, depending on value of Stream Type
					// Error Correction Data        BYTESTREAM   variable        // error-correction-specific format data, depending on value of Error Correct Type

// There is one GETID3_ASF_Stream_Properties_Object for each stream (audio, video) but the
					// stream number isn't known until halfway through decoding the structure, hence it
					// it is decoded to a temporary variable and then stuck in the appropriate index later

$StreamPropertiesObjectData['offset']             = $NextObjectOffset + $offset;
					$StreamPropertiesObjectData['objectid']           = $NextObjectGUID;
					$StreamPropertiesObjectData['objectid_guid']      = $NextObjectGUIDtext;
					$StreamPropertiesObjectData['objectsize']         = $NextObjectSize;
					$StreamPropertiesObjectData['stream_type']        = substr($ASFHeaderData, $offset, 16);
					$offset += 16;
					$StreamPropertiesObjectData['stream_type_guid']   = $this->BytestringToGUID($StreamPropertiesObjectData['stream_type']);
					$StreamPropertiesObjectData['error_correct_type'] = substr($ASFHeaderData, $offset, 16);
					$offset += 16;
					$StreamPropertiesObjectData['error_correct_guid'] = $this->BytestringToGUID($StreamPropertiesObjectData['error_correct_type']);
					$StreamPropertiesObjectData['time_offset']        = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 8));
					$offset += 8;
					$StreamPropertiesObjectData['type_data_length']   = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
					$offset += 4;
					$StreamPropertiesObjectData['error_data_length']  = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
					$offset += 4;
					$StreamPropertiesObjectData['flags_raw']          = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
					$offset += 2;
					$StreamPropertiesObjectStreamNumber               = $StreamPropertiesObjectData['flags_raw'] & 0x007F;
					$StreamPropertiesObjectData['flags']['encrypted'] = (bool) ($StreamPropertiesObjectData['flags_raw'] & 0x8000);

$offset += 4; // reserved - DWORD
					$StreamPropertiesObjectData['type_specific_data'] = substr($ASFHeaderData, $offset, $StreamPropertiesObjectData['type_data_length']);
					$offset += $StreamPropertiesObjectData['type_data_length'];
					$StreamPropertiesObjectData['error_correct_data'] = substr($ASFHeaderData, $offset, $StreamPropertiesObjectData['error_data_length']);
					$offset += $StreamPropertiesObjectData['error_data_length'];

switch ($StreamPropertiesObjectData['stream_type']) {

case GETID3_ASF_Audio_Media:
							$thisfile_audio['dataformat']   = (!empty($thisfile_audio['dataformat'])   ? $thisfile_audio['dataformat']   : 'asf');
							$thisfile_audio['bitrate_mode'] = (!empty($thisfile_audio['bitrate_mode']) ? $thisfile_audio['bitrate_mode'] : 'cbr');

$audiodata = getid3_riff::parseWAVEFORMATex(substr($StreamPropertiesObjectData['type_specific_data'], 0, 16));
							unset($audiodata['raw']);
							$thisfile_audio = getid3_lib::array_merge_noclobber($audiodata, $thisfile_audio);
							break;

case GETID3_ASF_Video_Media:
							$thisfile_video['dataformat']   = (!empty($thisfile_video['dataformat'])   ? $thisfile_video['dataformat']   : 'asf');
							$thisfile_video['bitrate_mode'] = (!empty($thisfile_video['bitrate_mode']) ? $thisfile_video['bitrate_mode'] : 'cbr');
							break;

case GETID3_ASF_Command_Media:
						default:
							// do nothing
							break;

}

$thisfile_asf['stream_properties_object'][$StreamPropertiesObjectStreamNumber] = $StreamPropertiesObjectData;
					unset($StreamPropertiesObjectData); // clear for next stream, if any
					break;

case GETID3_ASF_Header_Extension_Object:
					// Header Extension Object: (mandatory, one only)
					// Field Name                   Field Type   Size (bits)
					// Object ID                    GUID         128             // GUID for Header Extension object - GETID3_ASF_Header_Extension_Object
					// Object Size                  QWORD        64              // size of Header Extension object, including 46 bytes of Header Extension Object header
					// Reserved Field 1             GUID         128             // hardcoded: GETID3_ASF_Reserved_1
					// Reserved Field 2             WORD         16              // hardcoded: 0x00000006
					// Header Extension Data Size   DWORD        32              // in bytes. valid: 0, or > 24. equals object size minus 46
					// Header Extension Data        BYTESTREAM   variable        // array of zero or more extended header objects

// shortcut
					$thisfile_asf['header_extension_object'] = array();
					$thisfile_asf_headerextensionobject      = &$thisfile_asf['header_extension_object'];

$thisfile_asf_headerextensionobject['offset']              = $NextObjectOffset + $offset;
					$thisfile_asf_headerextensionobject['objectid']            = $NextObjectGUID;
					$thisfile_asf_headerextensionobject['objectid_guid']       = $NextObjectGUIDtext;
					$thisfile_asf_headerextensionobject['objectsize']          = $NextObjectSize;
					$thisfile_asf_headerextensionobject['reserved_1']          = substr($ASFHeaderData, $offset, 16);
					$offset += 16;
					$thisfile_asf_headerextensionobject['reserved_1_guid']     = $this->BytestringToGUID($thisfile_asf_headerextensionobject['reserved_1']);
					if ($thisfile_asf_headerextensionobject['reserved_1'] != GETID3_ASF_Reserved_1) {
						$this->warning('header_extension_object.reserved_1 GUID ('.$this->BytestringToGUID($thisfile_asf_headerextensionobject['reserved_1']).') does not match expected "GETID3_ASF_Reserved_1" GUID ('.$this->BytestringToGUID(GETID3_ASF_Reserved_1).')');
						//return false;
						break;
					}
					$thisfile_asf_headerextensionobject['reserved_2']          = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
					$offset += 2;
					if ($thisfile_asf_headerextensionobject['reserved_2'] != 6) {
						$this->warning('header_extension_object.reserved_2 ('.$thisfile_asf_headerextensionobject['reserved_2'].') does not match expected value of "6"');
						//return false;
						break;
					}
					$thisfile_asf_headerextensionobject['extension_data_size'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
					$offset += 4;
					$thisfile_asf_headerextensionobject['extension_data']      =                              substr($ASFHeaderData, $offset, $thisfile_asf_headerextensionobject['extension_data_size']);
					$unhandled_sections = 0;
					$thisfile_asf_headerextensionobject['extension_data_parsed'] = $this->HeaderExtensionObjectDataParse($thisfile_asf_headerextensionobject['extension_data'], $unhandled_sections);
					if ($unhandled_sections === 0) {
						unset($thisfile_asf_headerextensionobject['extension_data']);
					}
					$offset += $thisfile_asf_headerextensionobject['extension_data_size'];
					break;

case GETID3_ASF_Codec_List_Object:
					// Codec List Object: (optional, one only)
					// Field Name                   Field Type   Size (bits)
					// Object ID                    GUID         128             // GUID for Codec List object - GETID3_ASF_Codec_List_Object
					// Object Size                  QWORD        64              // size of Codec List object, including 44 bytes of Codec List Object header
					// Reserved                     GUID         128             // hardcoded: 86D15241-311D-11D0-A3A4-00A0C90348F6
					// Codec Entries Count          DWORD        32              // number of entries in Codec Entries array
					// Codec Entries                array of:    variable        //
					// * Type                       WORD         16              // 0x0001 = Video Codec, 0x0002 = Audio Codec, 0xFFFF = Unknown Codec
					// * Codec Name Length          WORD         16              // number of Unicode characters stored in the Codec Name field
					// * Codec Name                 WCHAR        variable        // array of Unicode characters - name of codec used to create the content
					// * Codec Description Length   WORD         16              // number of Unicode characters stored in the Codec Description field
					// * Codec Description          WCHAR        variable        // array of Unicode characters - description of format used to create the content
					// * Codec Information Length   WORD         16              // number of Unicode characters stored in the Codec Information field
					// * Codec Information          BYTESTREAM   variable        // opaque array of information bytes about the codec used to create the content

// shortcut
					$thisfile_asf['codec_list_object'] = array();
					/** @var mixed[] $thisfile_asf_codeclistobject */
					$thisfile_asf_codeclistobject      = &$thisfile_asf['codec_list_object']; // @phpstan-ignore-line

$thisfile_asf_codeclistobject['offset']                    = $NextObjectOffset + $offset;
					$thisfile_asf_codeclistobject['objectid']                  = $NextObjectGUID;
					$thisfile_asf_codeclistobject['objectid_guid']             = $NextObjectGUIDtext;
					$thisfile_asf_codeclistobject['objectsize']                = $NextObjectSize;
					$thisfile_asf_codeclistobject['reserved']                  = substr($ASFHeaderData, $offset, 16);
					$offset += 16;
					$thisfile_asf_codeclistobject['reserved_guid']             = $this->BytestringToGUID($thisfile_asf_codeclistobject['reserved']);
					if ($thisfile_asf_codeclistobject['reserved'] != $this->GUIDtoBytestring('86D15241-311D-11D0-A3A4-00A0C90348F6')) {
						$this->warning('codec_list_object.reserved GUID {'.$this->BytestringToGUID($thisfile_asf_codeclistobject['reserved']).'} does not match expected "GETID3_ASF_Reserved_1" GUID {86D15241-311D-11D0-A3A4-00A0C90348F6}');
						//return false;
						break;
					}
					$thisfile_asf_codeclistobject['codec_entries_count'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
					if ($thisfile_asf_codeclistobject['codec_entries_count'] > 0) {
						$thisfile_asf_codeclistobject['codec_entries'] = array();
					}
					$offset += 4;
					for ($CodecEntryCounter = 0; $CodecEntryCounter < $thisfile_asf_codeclistobject['codec_entries_count']; $CodecEntryCounter++) {
						// shortcut
						$thisfile_asf_codeclistobject['codec_entries'][$CodecEntryCounter] = array();
						$thisfile_asf_codeclistobject_codecentries_current = &$thisfile_asf_codeclistobject['codec_entries'][$CodecEntryCounter];

$thisfile_asf_codeclistobject_codecentries_current['type_raw'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
						$offset += 2;
						$thisfile_asf_codeclistobject_codecentries_current['type'] = self::codecListObjectTypeLookup($thisfile_asf_codeclistobject_codecentries_current['type_raw']);

$CodecNameLength = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2)) * 2; // 2 bytes per character
						$offset += 2;
						$thisfile_asf_codeclistobject_codecentries_current['name'] = substr($ASFHeaderData, $offset, $CodecNameLength);
						$offset += $CodecNameLength;

$CodecDescriptionLength = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2)) * 2; // 2 bytes per character
						$offset += 2;
						$thisfile_asf_codeclistobject_codecentries_current['description'] = substr($ASFHeaderData, $offset, $CodecDescriptionLength);
						$offset += $CodecDescriptionLength;

$CodecInformationLength = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
						$offset += 2;
						$thisfile_asf_codeclistobject_codecentries_current['information'] = substr($ASFHeaderData, $offset, $CodecInformationLength);
						$offset += $CodecInformationLength;

if ($thisfile_asf_codeclistobject_codecentries_current['type_raw'] == 2) { // audio codec

if (strpos($thisfile_asf_codeclistobject_codecentries_current['description'], ',') === false) {
								$this->warning('[asf][codec_list_object][codec_entries]['.$CodecEntryCounter.'][description] expected to contain comma-separated list of parameters: "'.$thisfile_asf_codeclistobject_codecentries_current['description'].'"');
							} else {

list($AudioCodecBitrate, $AudioCodecFrequency, $AudioCodecChannels) = explode(',', $this->TrimConvert($thisfile_asf_codeclistobject_codecentries_current['description']));
								$thisfile_audio['codec'] = $this->TrimConvert($thisfile_asf_codeclistobject_codecentries_current['name']);

if (!isset($thisfile_audio['bitrate']) && strstr($AudioCodecBitrate, 'kbps')) {
									$thisfile_audio['bitrate'] = (int) trim(str_replace('kbps', '', $AudioCodecBitrate)) * 1000;
								}
								//if (!isset($thisfile_video['bitrate']) && isset($thisfile_audio['bitrate']) && isset($thisfile_asf['file_properties_object']['max_bitrate']) && ($thisfile_asf_codeclistobject['codec_entries_count'] > 1)) {
								if (empty($thisfile_video['bitrate']) && !empty($thisfile_audio['bitrate']) && !empty($info['bitrate'])) {
									//$thisfile_video['bitrate'] = $thisfile_asf['file_properties_object']['max_bitrate'] - $thisfile_audio['bitrate'];
									$thisfile_video['bitrate'] = $info['bitrate'] - $thisfile_audio['bitrate'];
								}

$AudioCodecFrequency = (int) trim(str_replace('kHz', '', $AudioCodecFrequency));
								switch ($AudioCodecFrequency) {
									case 8:
									case 8000:
										$thisfile_audio['sample_rate'] = 8000;
										break;

case 11:
									case 11025:
										$thisfile_audio['sample_rate'] = 11025;
										break;

case 12:
									case 12000:
										$thisfile_audio['sample_rate'] = 12000;
										break;

case 16:
									case 16000:
										$thisfile_audio['sample_rate'] = 16000;
										break;

case 22:
									case 22050:
										$thisfile_audio['sample_rate'] = 22050;
										break;

case 24:
									case 24000:
										$thisfile_audio['sample_rate'] = 24000;
										break;

case 32:
									case 32000:
										$thisfile_audio['sample_rate'] = 32000;
										break;

case 44:
									case 441000:
										$thisfile_audio['sample_rate'] = 44100;
										break;

case 48:
									case 48000:
										$thisfile_audio['sample_rate'] = 48000;
										break;

default:
										$this->warning('unknown frequency: "'.$AudioCodecFrequency.'" ('.$this->TrimConvert($thisfile_asf_codeclistobject_codecentries_current['description']).')');
										break;
								}

if (!isset($thisfile_audio['channels'])) {
									if (strstr($AudioCodecChannels, 'stereo')) {
										$thisfile_audio['channels'] = 2;
									} elseif (strstr($AudioCodecChannels, 'mono')) {
										$thisfile_audio['channels'] = 1;
									}
								}

}
						}
					}
					break;

case GETID3_ASF_Script_Command_Object:
					// Script Command Object: (optional, one only)
					// Field Name                   Field Type   Size (bits)
					// Object ID                    GUID         128             // GUID for Script Command object - GETID3_ASF_Script_Command_Object
					// Object Size                  QWORD        64              // size of Script Command object, including 44 bytes of Script Command Object header
					// Reserved                     GUID         128             // hardcoded: 4B1ACBE3-100B-11D0-A39B-00A0C90348F6
					// Commands Count               WORD         16              // number of Commands structures in the Script Commands Objects
					// Command Types Count          WORD         16              // number of Command Types structures in the Script Commands Objects
					// Command Types                array of:    variable        //
					// * Command Type Name Length   WORD         16              // number of Unicode characters for Command Type Name
					// * Command Type Name          WCHAR        variable        // array of Unicode characters - name of a type of command
					// Commands                     array of:    variable        //
					// * Presentation Time          DWORD        32              // presentation time of that command, in milliseconds
					// * Type Index                 WORD         16              // type of this command, as a zero-based index into the array of Command Types of this object
					// * Command Name Length        WORD         16              // number of Unicode characters for Command Name
					// * Command Name               WCHAR        variable        // array of Unicode characters - name of this command

// shortcut
					$thisfile_asf['script_command_object'] = array();
					$thisfile_asf_scriptcommandobject      = &$thisfile_asf['script_command_object'];

$thisfile_asf_scriptcommandobject['offset']               = $NextObjectOffset + $offset;
					$thisfile_asf_scriptcommandobject['objectid']             = $NextObjectGUID;
					$thisfile_asf_scriptcommandobject['objectid_guid']        = $NextObjectGUIDtext;
					$thisfile_asf_scriptcommandobject['objectsize']           = $NextObjectSize;
					$thisfile_asf_scriptcommandobject['reserved']             = substr($ASFHeaderData, $offset, 16);
					$offset += 16;
					$thisfile_asf_scriptcommandobject['reserved_guid']        = $this->BytestringToGUID($thisfile_asf_scriptcommandobject['reserved']);
					if ($thisfile_asf_scriptcommandobject['reserved'] != $this->GUIDtoBytestring('4B1ACBE3-100B-11D0-A39B-00A0C90348F6')) {
						$this->warning('script_command_object.reserved GUID {'.$this->BytestringToGUID($thisfile_asf_scriptcommandobject['reserved']).'} does not match expected "GETID3_ASF_Reserved_1" GUID {4B1ACBE3-100B-11D0-A39B-00A0C90348F6}');
						//return false;
						break;
					}
					$thisfile_asf_scriptcommandobject['commands_count']       = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
					$offset += 2;
					$thisfile_asf_scriptcommandobject['command_types_count']  = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
					$offset += 2;
					if ($thisfile_asf_scriptcommandobject['command_types_count'] > 0) {
						$thisfile_asf_scriptcommandobject['command_types'] = array();
						for ($CommandTypesCounter = 0; $CommandTypesCounter < (int) $thisfile_asf_scriptcommandobject['command_types_count']; $CommandTypesCounter++) {
							$CommandTypeNameLength = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2)) * 2; // 2 bytes per character
							$offset += 2;
							$thisfile_asf_scriptcommandobject['command_types'][$CommandTypesCounter] = array();
							$thisfile_asf_scriptcommandobject['command_types'][$CommandTypesCounter]['name'] = substr($ASFHeaderData, $offset, $CommandTypeNameLength);
							$offset += $CommandTypeNameLength;
						}
					}
					for ($CommandsCounter = 0; $CommandsCounter < (int) $thisfile_asf_scriptcommandobject['commands_count']; $CommandsCounter++) {
						$thisfile_asf_scriptcommandobject['commands'][$CommandsCounter]['presentation_time']  = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
						$offset += 4;
						$thisfile_asf_scriptcommandobject['commands'][$CommandsCounter]['type_index']         = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
						$offset += 2;

$CommandTypeNameLength = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2)) * 2; // 2 bytes per character
						$offset += 2;
						$thisfile_asf_scriptcommandobject['commands'][$CommandsCounter]['name'] = substr($ASFHeaderData, $offset, $CommandTypeNameLength);
						$offset += $CommandTypeNameLength;
					}
					break;

case GETID3_ASF_Marker_Object:
					// Marker Object: (optional, one only)
					// Field Name                   Field Type   Size (bits)
					// Object ID                    GUID         128             // GUID for Marker object - GETID3_ASF_Marker_Object
					// Object Size                  QWORD        64              // size of Marker object, including 48 bytes of Marker Object header
					// Reserved                     GUID         128             // hardcoded: 4CFEDB20-75F6-11CF-9C0F-00A0C90349CB
					// Markers Count                DWORD        32              // number of Marker structures in Marker Object
					// Reserved                     WORD         16              // hardcoded: 0x0000
					// Name Length                  WORD         16              // number of bytes in the Name field
					// Name                         WCHAR        variable        // name of the Marker Object
					// Markers                      array of:    variable        //
					// * Offset                     QWORD        64              // byte offset into Data Object
					// * Presentation Time          QWORD        64              // in 100-nanosecond units
					// * Entry Length               WORD         16              // length in bytes of (Send Time + Flags + Marker Description Length + Marker Description + Padding)
					// * Send Time                  DWORD        32              // in milliseconds
					// * Flags                      DWORD        32              // hardcoded: 0x00000000
					// * Marker Description Length  DWORD        32              // number of bytes in Marker Description field
					// * Marker Description         WCHAR        variable        // array of Unicode characters - description of marker entry
					// * Padding                    BYTESTREAM   variable        // optional padding bytes

// shortcut
					$thisfile_asf['marker_object'] = array();
					$thisfile_asf_markerobject     = &$thisfile_asf['marker_object'];

$thisfile_asf_markerobject['offset']               = $NextObjectOffset + $offset;
					$thisfile_asf_markerobject['objectid']             = $NextObjectGUID;
					$thisfile_asf_markerobject['objectid_guid']        = $NextObjectGUIDtext;
					$thisfile_asf_markerobject['objectsize']           = $NextObjectSize;
					$thisfile_asf_markerobject['reserved']             = substr($ASFHeaderData, $offset, 16);
					$offset += 16;
					$thisfile_asf_markerobject['reserved_guid']        = $this->BytestringToGUID($thisfile_asf_markerobject['reserved']);
					if ($thisfile_asf_markerobject['reserved'] != $this->GUIDtoBytestring('4CFEDB20-75F6-11CF-9C0F-00A0C90349CB')) {
						$this->warning('marker_object.reserved GUID {'.$this->BytestringToGUID($thisfile_asf_markerobject['reserved']).'} does not match expected "GETID3_ASF_Reserved_1" GUID {4CFEDB20-75F6-11CF-9C0F-00A0C90349CB}');
						break;
					}
					$thisfile_asf_markerobject['markers_count'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
					/** @var int|float|false $totalMakersCount */
					$totalMakersCount = $thisfile_asf_markerobject['markers_count'];
					$offset += 4;
					$thisfile_asf_markerobject['reserved_2'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
					$offset += 2;
					if ($thisfile_asf_markerobject['reserved_2'] != 0) {
						$this->warning('marker_object.reserved_2 ('.$thisfile_asf_markerobject['reserved_2'].') does not match expected value of "0"');
						break;
					}
					$thisfile_asf_markerobject['name_length'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
					$offset += 2;
					$thisfile_asf_markerobject['name'] = substr($ASFHeaderData, $offset, $thisfile_asf_markerobject['name_length']);
					$offset += $thisfile_asf_markerobject['name_length'];
					for ($MarkersCounter = 0; $MarkersCounter < $totalMakersCount; $MarkersCounter++) {
						$thisfile_asf_markerobject['markers'][$MarkersCounter] = array();
						$thisfile_asf_markerobject['markers'][$MarkersCounter]['offset']  = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 8));
						$offset += 8;
						$thisfile_asf_markerobject['markers'][$MarkersCounter]['presentation_time']         = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 8));
						$offset += 8;
						$thisfile_asf_markerobject['markers'][$MarkersCounter]['entry_length']              = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
						$offset += 2;
						$thisfile_asf_markerobject['markers'][$MarkersCounter]['send_time']                 = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
						$offset += 4;
						$thisfile_asf_markerobject['markers'][$MarkersCounter]['flags']                     = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
						$offset += 4;
						$thisfile_asf_markerobject['markers'][$MarkersCounter]['marker_description_length'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
						$offset += 4;
						$thisfile_asf_markerobject['markers'][$MarkersCounter]['marker_description']        = substr($ASFHeaderData, $offset, $thisfile_asf_markerobject['markers'][$MarkersCounter]['marker_description_length']);
						$offset += $thisfile_asf_markerobject['markers'][$MarkersCounter]['marker_description_length'];
						$PaddingLength = $thisfile_asf_markerobject['markers'][$MarkersCounter]['entry_length'] - 4 -  4 - 4 - $thisfile_asf_markerobject['markers'][$MarkersCounter]['marker_description_length'];
						if ($PaddingLength > 0) {
							$thisfile_asf_markerobject['markers'][$MarkersCounter]['padding']               = substr($ASFHeaderData, $offset, $PaddingLength);
							$offset += $PaddingLength;
						}
					}
					break;

case GETID3_ASF_Bitrate_Mutual_Exclusion_Object:
					// Bitrate Mutual Exclusion Object: (optional)
					// Field Name                   Field Type   Size (bits)
					// Object ID                    GUID         128             // GUID for Bitrate Mutual Exclusion object - GETID3_ASF_Bitrate_Mutual_Exclusion_Object
					// Object Size                  QWORD        64              // size of Bitrate Mutual Exclusion object, including 42 bytes of Bitrate Mutual Exclusion Object header
					// Exlusion Type                GUID         128             // nature of mutual exclusion relationship. one of: (GETID3_ASF_Mutex_Bitrate, GETID3_ASF_Mutex_Unknown)
					// Stream Numbers Count         WORD         16              // number of video streams
					// Stream Numbers               WORD         variable        // array of mutually exclusive video stream numbers. 1 <= valid <= 127

// shortcut
					$thisfile_asf['bitrate_mutual_exclusion_object'] = array();
					$thisfile_asf_bitratemutualexclusionobject       = &$thisfile_asf['bitrate_mutual_exclusion_object'];

$thisfile_asf_bitratemutualexclusionobject['offset']               = $NextObjectOffset + $offset;
					$thisfile_asf_bitratemutualexclusionobject['objectid']             = $NextObjectGUID;
					$thisfile_asf_bitratemutualexclusionobject['objectid_guid']        = $NextObjectGUIDtext;
					$thisfile_asf_bitratemutualexclusionobject['objectsize']           = $NextObjectSize;
					$thisfile_asf_bitratemutualexclusionobject['reserved']             = substr($ASFHeaderData, $offset, 16);
					$thisfile_asf_bitratemutualexclusionobject['reserved_guid']        = $this->BytestringToGUID($thisfile_asf_bitratemutualexclusionobject['reserved']);
					$offset += 16;
					if (($thisfile_asf_bitratemutualexclusionobject['reserved'] != GETID3_ASF_Mutex_Bitrate) && ($thisfile_asf_bitratemutualexclusionobject['reserved'] != GETID3_ASF_Mutex_Unknown)) {
						$this->warning('bitrate_mutual_exclusion_object.reserved GUID {'.$this->BytestringToGUID($thisfile_asf_bitratemutualexclusionobject['reserved']).'} does not match expected "GETID3_ASF_Mutex_Bitrate" GUID {'.$this->BytestringToGUID(GETID3_ASF_Mutex_Bitrate).'} or  "GETID3_ASF_Mutex_Unknown" GUID {'.$this->BytestringToGUID(GETID3_ASF_Mutex_Unknown).'}');
						//return false;
						break;
					}
					$thisfile_asf_bitratemutualexclusionobject['stream_numbers_count'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
					$offset += 2;
					for ($StreamNumberCounter = 0; $StreamNumberCounter < (int) $thisfile_asf_bitratemutualexclusionobject['stream_numbers_count']; $StreamNumberCounter++) {
						$thisfile_asf_bitratemutualexclusionobject['stream_numbers'][$StreamNumberCounter] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
						$offset += 2;
					}
					break;

case GETID3_ASF_Error_Correction_Object:
					// Error Correction Object: (optional, one only)
					// Field Name                   Field Type   Size (bits)
					// Object ID                    GUID         128             // GUID for Error Correction object - GETID3_ASF_Error_Correction_Object
					// Object Size                  QWORD        64              // size of Error Correction object, including 44 bytes of Error Correction Object header
					// Error Correction Type        GUID         128             // type of error correction. one of: (GETID3_ASF_No_Error_Correction, GETID3_ASF_Audio_Spread)
					// Error Correction Data Length DWORD        32              // number of bytes in Error Correction Data field
					// Error Correction Data        BYTESTREAM   variable        // structure depends on value of Error Correction Type field

// shortcut
					$thisfile_asf['error_correction_object'] = array();
					$thisfile_asf_errorcorrectionobject      = &$thisfile_asf['error_correction_object'];

$thisfile_asf_errorcorrectionobject['offset']                = $NextObjectOffset + $offset;
					$thisfile_asf_errorcorrectionobject['objectid']              = $NextObjectGUID;
					$thisfile_asf_errorcorrectionobject['objectid_guid']         = $NextObjectGUIDtext;
					$thisfile_asf_errorcorrectionobject['objectsize']            = $NextObjectSize;
					$thisfile_asf_errorcorrectionobject['error_correction_type'] = substr($ASFHeaderData, $offset, 16);
					$offset += 16;
					$thisfile_asf_errorcorrectionobject['error_correction_guid'] = $this->BytestringToGUID($thisfile_asf_errorcorrectionobject['error_correction_type']);
					$thisfile_asf_errorcorrectionobject['error_correction_data_length'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
					$offset += 4;
					switch ($thisfile_asf_errorcorrectionobject['error_correction_type']) {
						case GETID3_ASF_No_Error_Correction:
							// should be no data, but just in case there is, skip to the end of the field
							$offset += $thisfile_asf_errorcorrectionobject['error_correction_data_length'];
							break;

case GETID3_ASF_Audio_Spread:
							// Field Name                   Field Type   Size (bits)
							// Span                         BYTE         8               // number of packets over which audio will be spread.
							// Virtual Packet Length        WORD         16              // size of largest audio payload found in audio stream
							// Virtual Chunk Length         WORD         16              // size of largest audio payload found in audio stream
							// Silence Data Length          WORD         16              // number of bytes in Silence Data field
							// Silence Data                 BYTESTREAM   variable        // hardcoded: 0x00 * (Silence Data Length) bytes

$thisfile_asf_errorcorrectionobject['span']                  = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 1));
							$offset += 1;
							$thisfile_asf_errorcorrectionobject['virtual_packet_length'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
							$offset += 2;
							$thisfile_asf_errorcorrectionobject['virtual_chunk_length']  = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
							$offset += 2;
							$thisfile_asf_errorcorrectionobject['silence_data_length']   = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
							$offset += 2;
							$thisfile_asf_errorcorrectionobject['silence_data']          = substr($ASFHeaderData, $offset, $thisfile_asf_errorcorrectionobject['silence_data_length']);
							$offset += $thisfile_asf_errorcorrectionobject['silence_data_length'];
							break;

default:
							$this->warning('error_correction_object.error_correction_type GUID {'.$this->BytestringToGUID($thisfile_asf_errorcorrectionobject['error_correction_type']).'} does not match expected "GETID3_ASF_No_Error_Correction" GUID {'.$this->BytestringToGUID(GETID3_ASF_No_Error_Correction).'} or  "GETID3_ASF_Audio_Spread" GUID {'.$this->BytestringToGUID(GETID3_ASF_Audio_Spread).'}');
							//return false;
							break;
					}

break;

case GETID3_ASF_Content_Description_Object:
					// Content Description Object: (optional, one only)
					// Field Name                   Field Type   Size (bits)
					// Object ID                    GUID         128             // GUID for Content Description object - GETID3_ASF_Content_Description_Object
					// Object Size                  QWORD        64              // size of Content Description object, including 34 bytes of Content Description Object header
					// Title Length                 WORD         16              // number of bytes in Title field
					// Author Length                WORD         16              // number of bytes in Author field
					// Copyright Length             WORD         16              // number of bytes in Copyright field
					// Description Length           WORD         16              // number of bytes in Description field
					// Rating Length                WORD         16              // number of bytes in Rating field
					// Title                        WCHAR        16              // array of Unicode characters - Title
					// Author                       WCHAR        16              // array of Unicode characters - Author
					// Copyright                    WCHAR        16              // array of Unicode characters - Copyright
					// Description                  WCHAR        16              // array of Unicode characters - Description
					// Rating                       WCHAR        16              // array of Unicode characters - Rating

// shortcut
					$thisfile_asf['content_description_object'] = array();
					$thisfile_asf_contentdescriptionobject      = &$thisfile_asf['content_description_object'];

$thisfile_asf_contentdescriptionobject['offset']                = $NextObjectOffset + $offset;
					$thisfile_asf_contentdescriptionobject['objectid']              = $NextObjectGUID;
					$thisfile_asf_contentdescriptionobject['objectid_guid']         = $NextObjectGUIDtext;
					$thisfile_asf_contentdescriptionobject['objectsize']            = $NextObjectSize;
					$thisfile_asf_contentdescriptionobject['title_length']          = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
					$offset += 2;
					$thisfile_asf_contentdescriptionobject['author_length']         = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
					$offset += 2;
					$thisfile_asf_contentdescriptionobject['copyright_length']      = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
					$offset += 2;
					$thisfile_asf_contentdescriptionobject['description_length']    = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
					$offset += 2;
					$thisfile_asf_contentdescriptionobject['rating_length']         = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
					$offset += 2;
					$thisfile_asf_contentdescriptionobject['title']                 = substr($ASFHeaderData, $offset, $thisfile_asf_contentdescriptionobject['title_length']);
					$offset += $thisfile_asf_contentdescriptionobject['title_length'];
					$thisfile_asf_contentdescriptionobject['author']                = substr($ASFHeaderData, $offset, $thisfile_asf_contentdescriptionobject['author_length']);
					$offset += $thisfile_asf_contentdescriptionobject['author_length'];
					$thisfile_asf_contentdescriptionobject['copyright']             = substr($ASFHeaderData, $offset, $thisfile_asf_contentdescriptionobject['copyright_length']);
					$offset += $thisfile_asf_contentdescriptionobject['copyright_length'];
					$thisfile_asf_contentdescriptionobject['description']           = substr($ASFHeaderData, $offset, $thisfile_asf_contentdescriptionobject['description_length']);
					$offset += $thisfile_asf_contentdescriptionobject['description_length'];
					$thisfile_asf_contentdescriptionobject['rating']                = substr($ASFHeaderData, $offset, $thisfile_asf_contentdescriptionobject['rating_length']);
					$offset += $thisfile_asf_contentdescriptionobject['rating_length'];

$ASFcommentKeysToCopy = array('title'=>'title', 'author'=>'artist', 'copyright'=>'copyright', 'description'=>'comment', 'rating'=>'rating');
					foreach ($ASFcommentKeysToCopy as $keytocopyfrom => $keytocopyto) {
						if (!empty($thisfile_asf_contentdescriptionobject[$keytocopyfrom])) {
							$thisfile_asf_comments[$keytocopyto][] = $this->TrimTerm($thisfile_asf_contentdescriptionobject[$keytocopyfrom]);
						}
					}
					break;

case GETID3_ASF_Extended_Content_Description_Object:
					// Extended Content Description Object: (optional, one only)
					// Field Name                   Field Type   Size (bits)
					// Object ID                    GUID         128             // GUID for Extended Content Description object - GETID3_ASF_Extended_Content_Description_Object
					// Object Size                  QWORD        64              // size of ExtendedContent Description object, including 26 bytes of Extended Content Description Object header
					// Content Descriptors Count    WORD         16              // number of entries in Content Descriptors list
					// Content Descriptors          array of:    variable        //
					// * Descriptor Name Length     WORD         16              // size in bytes of Descriptor Name field
					// * Descriptor Name            WCHAR        variable        // array of Unicode characters - Descriptor Name
					// * Descriptor Value Data Type WORD         16              // Lookup array:
																					// 0x0000 = Unicode String (variable length)
																					// 0x0001 = BYTE array     (variable length)
																					// 0x0002 = BOOL           (DWORD, 32 bits)
																					// 0x0003 = DWORD          (DWORD, 32 bits)
																					// 0x0004 = QWORD          (QWORD, 64 bits)
																					// 0x0005 = WORD           (WORD,  16 bits)
					// * Descriptor Value Length    WORD         16              // number of bytes stored in Descriptor Value field
					// * Descriptor Value           variable     variable        // value for Content Descriptor

// shortcut
					$thisfile_asf['extended_content_description_object'] = array();
					$thisfile_asf_extendedcontentdescriptionobject       = &$thisfile_asf['extended_content_description_object'];

$thisfile_asf_extendedcontentdescriptionobject['offset']                    = $NextObjectOffset + $offset;
					$thisfile_asf_extendedcontentdescriptionobject['objectid']                  = $NextObjectGUID;
					$thisfile_asf_extendedcontentdescriptionobject['objectid_guid']             = $NextObjectGUIDtext;
					$thisfile_asf_extendedcontentdescriptionobject['objectsize']                = $NextObjectSize;
					$thisfile_asf_extendedcontentdescriptionobject['content_descriptors_count'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
					$offset += 2;
					for ($ExtendedContentDescriptorsCounter = 0; $ExtendedContentDescriptorsCounter < (int) $thisfile_asf_extendedcontentdescriptionobject['content_descriptors_count']; $ExtendedContentDescriptorsCounter++) {
						// shortcut
						$thisfile_asf_extendedcontentdescriptionobject['content_descriptors'][$ExtendedContentDescriptorsCounter] = array();
						$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current                 = &$thisfile_asf_extendedcontentdescriptionobject['content_descriptors'][$ExtendedContentDescriptorsCounter];

$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['base_offset']  = $offset + 30;
						$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['name_length']  = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
						$offset += 2;
						$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['name']         = substr($ASFHeaderData, $offset, $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['name_length']);
						$offset += $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['name_length'];
						$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value_type']   = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
						$offset += 2;
						$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value_length'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
						$offset += 2;
						$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']        = substr($ASFHeaderData, $offset, $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value_length']);
						$offset += $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value_length'];
						switch ($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value_type']) {
							case 0x0000: // Unicode string
								break;

case 0x0001: // BYTE array
								// do nothing
								break;

case 0x0002: // BOOL
								$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value'] = (bool) getid3_lib::LittleEndian2Int($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']);
								break;

case 0x0003: // DWORD
							case 0x0004: // QWORD
							case 0x0005: // WORD
								$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value'] = getid3_lib::LittleEndian2Int($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']);
								break;

default:
								$this->warning('extended_content_description.content_descriptors.'.$ExtendedContentDescriptorsCounter.'.value_type is invalid ('.$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value_type'].')');
								//return false;
								break;
						}
						switch ($this->TrimConvert(strtolower($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['name']))) {

case 'wm/albumartist':
							case 'artist':
								// Note: not 'artist', that comes from 'author' tag
								$thisfile_asf_comments['albumartist'] = array($this->TrimTerm($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']));
								break;

case 'wm/albumtitle':
							case 'album':
								$thisfile_asf_comments['album']  = array($this->TrimTerm($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']));
								break;

case 'wm/genre':
							case 'genre':
								$thisfile_asf_comments['genre'] = array($this->TrimTerm($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']));
								break;

case 'wm/partofset':
								$thisfile_asf_comments['partofset'] = array($this->TrimTerm($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']));
								break;

case 'wm/tracknumber':
							case 'tracknumber':
								// be careful casting to int: casting unicode strings to int gives unexpected results (stops parsing at first non-numeric character)
								$thisfile_asf_comments['track_number'] = array($this->TrimTerm($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']));
								foreach ($thisfile_asf_comments['track_number'] as $key => $value) {
									if (preg_match('/^[0-9\x00]+$/', $value)) {
										$thisfile_asf_comments['track_number'][$key] = intval(str_replace("\x00", '', $value));
									}
								}
								break;

case 'wm/track':
								if (empty($thisfile_asf_comments['track_number'])) {
									$thisfile_asf_comments['track_number'] = array(1 + (int) $this->TrimConvert($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']));
								}
								break;

case 'wm/year':
							case 'year':
							case 'date':
								$thisfile_asf_comments['year'] = array( $this->TrimTerm($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']));
								break;

case 'wm/lyrics':
							case 'lyrics':
								$thisfile_asf_comments['lyrics'] = array($this->TrimTerm($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']));
								break;

case 'isvbr':
								if ($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']) {
									$thisfile_audio['bitrate_mode'] = 'vbr';
									$thisfile_video['bitrate_mode'] = 'vbr';
								}
								break;

case 'id3':
								$this->getid3->include_module('tag.id3v2');

$getid3_id3v2 = new getid3_id3v2($this->getid3);
								$getid3_id3v2->AnalyzeString($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']);
								unset($getid3_id3v2);

if ($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value_length'] > 1024) {
									$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value'] = '<value too large to display>';
								}
								break;

case 'wm/encodingtime':
								$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['encoding_time_unix'] = $this->FILETIMEtoUNIXtime($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']);
								$thisfile_asf_comments['encoding_time_unix'] = array($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['encoding_time_unix']);
								break;

case 'wm/picture':
								$WMpicture = $this->ASF_WMpicture($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']);
								foreach ($WMpicture as $key => $value) {
									$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current[$key] = $value;
								}
								unset($WMpicture);
/*
								$wm_picture_offset = 0;
								$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['image_type_id'] = getid3_lib::LittleEndian2Int(substr($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value'], $wm_picture_offset, 1));
								$wm_picture_offset += 1;
								$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['image_type']    = self::WMpictureTypeLookup($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['image_type_id']);
								$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['image_size']    = getid3_lib::LittleEndian2Int(substr($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value'], $wm_picture_offset, 4));
								$wm_picture_offset += 4;

$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['image_mime'] = '';
								do {
									$next_byte_pair = substr($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value'], $wm_picture_offset, 2);
									$wm_picture_offset += 2;
									$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['image_mime'] .= $next_byte_pair;
								} while ($next_byte_pair !== "\x00\x00");

$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['image_description'] = '';
								do {
									$next_byte_pair = substr($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value'], $wm_picture_offset, 2);
									$wm_picture_offset += 2;
									$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['image_description'] .= $next_byte_pair;
								} while ($next_byte_pair !== "\x00\x00");

$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['dataoffset'] = $wm_picture_offset;
								$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['data'] = substr($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value'], $wm_picture_offset);
								unset($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']);

$imageinfo = array();
								$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['image_mime'] = '';
								$imagechunkcheck = getid3_lib::GetDataImageSize($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['data'], $imageinfo);
								unset($imageinfo);
								if (!empty($imagechunkcheck)) {
									$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['image_mime'] = image_type_to_mime_type($imagechunkcheck[2]);
								}
								if (!isset($thisfile_asf_comments['picture'])) {
									$thisfile_asf_comments['picture'] = array();
								}
								$thisfile_asf_comments['picture'][] = array('data'=>$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['data'], 'image_mime'=>$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['image_mime']);
*/
								break;

default:
								switch ($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value_type']) {
									case 0: // Unicode string
										if (substr($this->TrimConvert($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['name']), 0, 3) == 'WM/') {
											$thisfile_asf_comments[str_replace('wm/', '', strtolower($this->TrimConvert($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['name'])))] = array($this->TrimTerm($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']));
										}
										break;

case 1:
										break;
								}
								break;
						}

}
					break;

case GETID3_ASF_Stream_Bitrate_Properties_Object:
					// Stream Bitrate Properties Object: (optional, one only)
					// Field Name                   Field Type   Size (bits)
					// Object ID                    GUID         128             // GUID for Stream Bitrate Properties object - GETID3_ASF_Stream_Bitrate_Properties_Object
					// Object Size                  QWORD        64              // size of Extended Content Description object, including 26 bytes of Stream Bitrate Properties Object header
					// Bitrate Records Count        WORD         16              // number of records in Bitrate Records
					// Bitrate Records              array of:    variable        //
					// * Flags                      WORD         16              //
					// * * Stream Number            bits         7  (0x007F)     // number of this stream
					// * * Reserved                 bits         9  (0xFF80)     // hardcoded: 0
					// * Average Bitrate            DWORD        32              // in bits per second

// shortcut
					$thisfile_asf['stream_bitrate_properties_object'] = array();
					$thisfile_asf_streambitratepropertiesobject       = &$thisfile_asf['stream_bitrate_properties_object'];

$thisfile_asf_streambitratepropertiesobject['offset']                    = $NextObjectOffset + $offset;
					$thisfile_asf_streambitratepropertiesobject['objectid']                  = $NextObjectGUID;
					$thisfile_asf_streambitratepropertiesobject['objectid_guid']             = $NextObjectGUIDtext;
					$thisfile_asf_streambitratepropertiesobject['objectsize']                = $NextObjectSize;
					$thisfile_asf_streambitratepropertiesobject['bitrate_records_count']     = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
					$offset += 2;
					for ($BitrateRecordsCounter = 0; $BitrateRecordsCounter < (int) $thisfile_asf_streambitratepropertiesobject['bitrate_records_count']; $BitrateRecordsCounter++) {
						$thisfile_asf_streambitratepropertiesobject['bitrate_records'][$BitrateRecordsCounter] = array();
						$thisfile_asf_streambitratepropertiesobject['bitrate_records'][$BitrateRecordsCounter]['flags_raw'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
						$offset += 2;
						$thisfile_asf_streambitratepropertiesobject['bitrate_records'][$BitrateRecordsCounter]['flags']['stream_number'] = $thisfile_asf_streambitratepropertiesobject['bitrate_records'][$BitrateRecordsCounter]['flags_raw'] & 0x007F;
						$thisfile_asf_streambitratepropertiesobject['bitrate_records'][$BitrateRecordsCounter]['bitrate'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 4));
						$offset += 4;
					}
					break;

case GETID3_ASF_Padding_Object:
					// Padding Object: (optional)
					// Field Name                   Field Type   Size (bits)
					// Object ID                    GUID         128             // GUID for Padding object - GETID3_ASF_Padding_Object
					// Object Size                  QWORD        64              // size of Padding object, including 24 bytes of ASF Padding Object header
					// Padding Data                 BYTESTREAM   variable        // ignore

// shortcut
					$thisfile_asf['padding_object'] = array();
					$thisfile_asf_paddingobject     = &$thisfile_asf['padding_object'];

$thisfile_asf_paddingobject['offset']                    = $NextObjectOffset + $offset;
					$thisfile_asf_paddingobject['objectid']                  = $NextObjectGUID;
					$thisfile_asf_paddingobject['objectid_guid']             = $NextObjectGUIDtext;
					$thisfile_asf_paddingobject['objectsize']                = $NextObjectSize;
					$thisfile_asf_paddingobject['padding_length']            = $thisfile_asf_paddingobject['objectsize'] - 16 - 8;
					$thisfile_asf_paddingobject['padding']                   = substr($ASFHeaderData, $offset, $thisfile_asf_paddingobject['padding_length']);
					$offset += ($NextObjectSize - 16 - 8);
					break;

case GETID3_ASF_Extended_Content_Encryption_Object:
				case GETID3_ASF_Content_Encryption_Object:
					// WMA DRM - just ignore
					$offset += ($NextObjectSize - 16 - 8);
					break;

default:
					// Implementations shall ignore any standard or non-standard object that they do not know how to handle.
					if ($this->GUIDname($NextObjectGUIDtext)) {
						$this->warning('unhandled GUID "'.$this->GUIDname($NextObjectGUIDtext).'" {'.$NextObjectGUIDtext.'} in ASF header at offset '.($offset - 16 - 8));
					} else {
						$this->warning('unknown GUID {'.$NextObjectGUIDtext.'} in ASF header at offset '.($offset - 16 - 8));
					}
					$offset += ($NextObjectSize - 16 - 8);
					break;
			}
		}
		if (isset($thisfile_asf_streambitratepropertiesobject['bitrate_records_count'])) {
			$ASFbitrateAudio = 0;
			$ASFbitrateVideo = 0;
			for ($BitrateRecordsCounter = 0; $BitrateRecordsCounter < (int) $thisfile_asf_streambitratepropertiesobject['bitrate_records_count']; $BitrateRecordsCounter++) {
				if (isset($thisfile_asf_codeclistobject['codec_entries'][$BitrateRecordsCounter])) {
					switch ($thisfile_asf_codeclistobject['codec_entries'][$BitrateRecordsCounter]['type_raw']) {
						case 1:
							$ASFbitrateVideo += $thisfile_asf_streambitratepropertiesobject['bitrate_records'][$BitrateRecordsCounter]['bitrate'];
							break;

case 2:
							$ASFbitrateAudio += $thisfile_asf_streambitratepropertiesobject['bitrate_records'][$BitrateRecordsCounter]['bitrate'];
							break;

default:
							// do nothing
							break;
					}
				}
			}
			if ($ASFbitrateAudio > 0) {
				$thisfile_audio['bitrate'] = $ASFbitrateAudio;
			}
			if ($ASFbitrateVideo > 0) {
				$thisfile_video['bitrate'] = $ASFbitrateVideo;
			}
		}
		if (isset($thisfile_asf['stream_properties_object'])) {

$thisfile_audio['bitrate'] = 0;
			$thisfile_video['bitrate'] = 0;

foreach ($thisfile_asf['stream_properties_object'] as $streamnumber => $streamdata) {

switch ($streamdata['stream_type']) {
					case GETID3_ASF_Audio_Media:
						// Field Name                   Field Type   Size (bits)
						// Codec ID / Format Tag        WORD         16              // unique ID of audio codec - defined as wFormatTag field of WAVEFORMATEX structure
						// Number of Channels           WORD         16              // number of channels of audio - defined as nChannels field of WAVEFORMATEX structure
						// Samples Per Second           DWORD        32              // in Hertz - defined as nSamplesPerSec field of WAVEFORMATEX structure
						// Average number of Bytes/sec  DWORD        32              // bytes/sec of audio stream  - defined as nAvgBytesPerSec field of WAVEFORMATEX structure
						// Block Alignment              WORD         16              // block size in bytes of audio codec - defined as nBlockAlign field of WAVEFORMATEX structure
						// Bits per sample              WORD         16              // bits per sample of mono data. set to zero for variable bitrate codecs. defined as wBitsPerSample field of WAVEFORMATEX structure
						// Codec Specific Data Size     WORD         16              // size in bytes of Codec Specific Data buffer - defined as cbSize field of WAVEFORMATEX structure
						// Codec Specific Data          BYTESTREAM   variable        // array of codec-specific data bytes

// shortcut
						$thisfile_asf['audio_media'][$streamnumber] = array();
						$thisfile_asf_audiomedia_currentstream      = &$thisfile_asf['audio_media'][$streamnumber];

$audiomediaoffset = 0;

$thisfile_asf_audiomedia_currentstream = getid3_riff::parseWAVEFORMATex(substr($streamdata['type_specific_data'], $audiomediaoffset, 16));
						$audiomediaoffset += 16;

$thisfile_audio['lossless'] = false;
						switch ($thisfile_asf_audiomedia_currentstream['raw']['wFormatTag']) {
							case 0x0001: // PCM
							case 0x0163: // WMA9 Lossless
								$thisfile_audio['lossless'] = true;
								break;
						}

if (!empty($thisfile_asf['stream_bitrate_properties_object']['bitrate_records'])) { // @phpstan-ignore-line
							foreach ($thisfile_asf['stream_bitrate_properties_object']['bitrate_records'] as $dummy => $dataarray) { // @phpstan-ignore-line
								if (isset($dataarray['flags']['stream_number']) && ($dataarray['flags']['stream_number'] == $streamnumber)) {
									$thisfile_asf_audiomedia_currentstream['bitrate'] = $dataarray['bitrate'];
									$thisfile_audio['bitrate'] += $dataarray['bitrate'];
									break;
								}
							}
						} else {
							if (!empty($thisfile_asf_audiomedia_currentstream['bytes_sec'])) {
								$thisfile_audio['bitrate'] += $thisfile_asf_audiomedia_currentstream['bytes_sec'] * 8;
							} elseif (!empty($thisfile_asf_audiomedia_currentstream['bitrate'])) {
								$thisfile_audio['bitrate'] += $thisfile_asf_audiomedia_currentstream['bitrate'];
							}
						}
						$thisfile_audio['streams'][$streamnumber]                = $thisfile_asf_audiomedia_currentstream;
						$thisfile_audio['streams'][$streamnumber]['wformattag']  = $thisfile_asf_audiomedia_currentstream['raw']['wFormatTag'];
						$thisfile_audio['streams'][$streamnumber]['lossless']    = $thisfile_audio['lossless'];
						$thisfile_audio['streams'][$streamnumber]['bitrate']     = $thisfile_audio['bitrate'];
						$thisfile_audio['streams'][$streamnumber]['dataformat']  = 'wma';
						unset($thisfile_audio['streams'][$streamnumber]['raw']);

$thisfile_asf_audiomedia_currentstream['codec_data_size'] = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $audiomediaoffset, 2));
						$audiomediaoffset += 2;
						$thisfile_asf_audiomedia_currentstream['codec_data']      = substr($streamdata['type_specific_data'], $audiomediaoffset, $thisfile_asf_audiomedia_currentstream['codec_data_size']);
						$audiomediaoffset += $thisfile_asf_audiomedia_currentstream['codec_data_size'];

break;

case GETID3_ASF_Video_Media:
						// Field Name                   Field Type   Size (bits)
						// Encoded Image Width          DWORD        32              // width of image in pixels
						// Encoded Image Height         DWORD        32              // height of image in pixels
						// Reserved Flags               BYTE         8               // hardcoded: 0x02
						// Format Data Size             WORD         16              // size of Format Data field in bytes
						// Format Data                  array of:    variable        //
						// * Format Data Size           DWORD        32              // number of bytes in Format Data field, in bytes - defined as biSize field of BITMAPINFOHEADER structure
						// * Image Width                LONG         32              // width of encoded image in pixels - defined as biWidth field of BITMAPINFOHEADER structure
						// * Image Height               LONG         32              // height of encoded image in pixels - defined as biHeight field of BITMAPINFOHEADER structure
						// * Reserved                   WORD         16              // hardcoded: 0x0001 - defined as biPlanes field of BITMAPINFOHEADER structure
						// * Bits Per Pixel Count       WORD         16              // bits per pixel - defined as biBitCount field of BITMAPINFOHEADER structure
						// * Compression ID             FOURCC       32              // fourcc of video codec - defined as biCompression field of BITMAPINFOHEADER structure
						// * Image Size                 DWORD        32              // image size in bytes - defined as biSizeImage field of BITMAPINFOHEADER structure
						// * Horizontal Pixels / Meter  DWORD        32              // horizontal resolution of target device in pixels per meter - defined as biXPelsPerMeter field of BITMAPINFOHEADER structure
						// * Vertical Pixels / Meter    DWORD        32              // vertical resolution of target device in pixels per meter - defined as biYPelsPerMeter field of BITMAPINFOHEADER structure
						// * Colors Used Count          DWORD        32              // number of color indexes in the color table that are actually used - defined as biClrUsed field of BITMAPINFOHEADER structure
						// * Important Colors Count     DWORD        32              // number of color index required for displaying bitmap. if zero, all colors are required. defined as biClrImportant field of BITMAPINFOHEADER structure
						// * Codec Specific Data        BYTESTREAM   variable        // array of codec-specific data bytes

// shortcut
						$thisfile_asf['video_media'][$streamnumber] = array();
						$thisfile_asf_videomedia_currentstream      = &$thisfile_asf['video_media'][$streamnumber];

$videomediaoffset = 0;
						$thisfile_asf_videomedia_currentstream['image_width']                     = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 4));
						$videomediaoffset += 4;
						$thisfile_asf_videomedia_currentstream['image_height']                    = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 4));
						$videomediaoffset += 4;
						$thisfile_asf_videomedia_currentstream['flags']                           = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 1));
						$videomediaoffset += 1;
						$thisfile_asf_videomedia_currentstream['format_data_size']                = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 2));
						$videomediaoffset += 2;
						$thisfile_asf_videomedia_currentstream['format_data']['format_data_size'] = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 4));
						$videomediaoffset += 4;
						$thisfile_asf_videomedia_currentstream['format_data']['image_width']      = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 4));
						$videomediaoffset += 4;
						$thisfile_asf_videomedia_currentstream['format_data']['image_height']     = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 4));
						$videomediaoffset += 4;
						$thisfile_asf_videomedia_currentstream['format_data']['reserved']         = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 2));
						$videomediaoffset += 2;
						$thisfile_asf_videomedia_currentstream['format_data']['bits_per_pixel']   = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 2));
						$videomediaoffset += 2;
						$thisfile_asf_videomedia_currentstream['format_data']['codec_fourcc']     = substr($streamdata['type_specific_data'], $videomediaoffset, 4);
						$videomediaoffset += 4;
						$thisfile_asf_videomedia_currentstream['format_data']['image_size']       = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 4));
						$videomediaoffset += 4;
						$thisfile_asf_videomedia_currentstream['format_data']['horizontal_pels']  = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 4));
						$videomediaoffset += 4;
						$thisfile_asf_videomedia_currentstream['format_data']['vertical_pels']    = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 4));
						$videomediaoffset += 4;
						$thisfile_asf_videomedia_currentstream['format_data']['colors_used']      = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 4));
						$videomediaoffset += 4;
						$thisfile_asf_videomedia_currentstream['format_data']['colors_important'] = getid3_lib::LittleEndian2Int(substr($streamdata['type_specific_data'], $videomediaoffset, 4));
						$videomediaoffset += 4;
						$thisfile_asf_videomedia_currentstream['format_data']['codec_data']       = substr($streamdata['type_specific_data'], $videomediaoffset);

$thisfile_asf_videomedia_currentstream['format_data']['codec'] = getid3_riff::fourccLookup($thisfile_asf_videomedia_currentstream['format_data']['codec_fourcc']);

$thisfile_video['streams'][$streamnumber]['fourcc']          = $thisfile_asf_videomedia_currentstream['format_data']['codec_fourcc'];
						$thisfile_video['streams'][$streamnumber]['codec']           = $thisfile_asf_videomedia_currentstream['format_data']['codec'];
						$thisfile_video['streams'][$streamnumber]['resolution_x']    = $thisfile_asf_videomedia_currentstream['image_width'];
						$thisfile_video['streams'][$streamnumber]['resolution_y']    = $thisfile_asf_videomedia_currentstream['image_height'];
						$thisfile_video['streams'][$streamnumber]['bits_per_sample'] = $thisfile_asf_videomedia_currentstream['format_data']['bits_per_pixel'];
						break;

default:
						break;
				}
			}
		}

while ($this->ftell() < $info['avdataend']) {
			$NextObjectDataHeader = $this->fread(24);
			$offset = 0;
			$NextObjectGUID = substr($NextObjectDataHeader, 0, 16);
			$offset += 16;
			$NextObjectGUIDtext = $this->BytestringToGUID($NextObjectGUID);
			$NextObjectSize = getid3_lib::LittleEndian2Int(substr($NextObjectDataHeader, $offset, 8));
			$offset += 8;

switch ($NextObjectGUID) {
				case GETID3_ASF_Data_Object:
					// Data Object: (mandatory, one only)
					// Field Name                       Field Type   Size (bits)
					// Object ID                        GUID         128             // GUID for Data object - GETID3_ASF_Data_Object
					// Object Size                      QWORD        64              // size of Data object, including 50 bytes of Data Object header. may be 0 if FilePropertiesObject.BroadcastFlag == 1
					// File ID                          GUID         128             // unique identifier. identical to File ID field in Header Object
					// Total Data Packets               QWORD        64              // number of Data Packet entries in Data Object. invalid if FilePropertiesObject.BroadcastFlag == 1
					// Reserved                         WORD         16              // hardcoded: 0x0101

// shortcut
					$thisfile_asf['data_object'] = array();
					$thisfile_asf_dataobject     = &$thisfile_asf['data_object'];

$DataObjectData = $NextObjectDataHeader.$this->fread(50 - 24);
					$offset = 24;

$thisfile_asf_dataobject['objectid']           = $NextObjectGUID;
					$thisfile_asf_dataobject['objectid_guid']      = $NextObjectGUIDtext;
					$thisfile_asf_dataobject['objectsize']         = $NextObjectSize;

$thisfile_asf_dataobject['fileid']             = substr($DataObjectData, $offset, 16);
					$offset += 16;
					$thisfile_asf_dataobject['fileid_guid']        = $this->BytestringToGUID($thisfile_asf_dataobject['fileid']);
					$thisfile_asf_dataobject['total_data_packets'] = getid3_lib::LittleEndian2Int(substr($DataObjectData, $offset, 8));
					$offset += 8;
					$thisfile_asf_dataobject['reserved']           = getid3_lib::LittleEndian2Int(substr($DataObjectData, $offset, 2));
					$offset += 2;
					if ($thisfile_asf_dataobject['reserved'] != 0x0101) {
						$this->warning('data_object.reserved (0x'.sprintf('%04X', $thisfile_asf_dataobject['reserved']).') does not match expected value of "0x0101"');
						//return false;
						break;
					}

// Data Packets                     array of:    variable        //
					// * Error Correction Flags         BYTE         8               //
					// * * Error Correction Data Length bits         4               // if Error Correction Length Type == 00, size of Error Correction Data in bytes, else hardcoded: 0000
					// * * Opaque Data Present          bits         1               //
					// * * Error Correction Length Type bits         2               // number of bits for size of the error correction data. hardcoded: 00
					// * * Error Correction Present     bits         1               // If set, use Opaque Data Packet structure, else use Payload structure
					// * Error Correction Data

$info['avdataoffset'] = $this->ftell();
					$this->fseek(($thisfile_asf_dataobject['objectsize'] - 50), SEEK_CUR); // skip actual audio/video data
					$info['avdataend'] = $this->ftell();
					break;

case GETID3_ASF_Simple_Index_Object:
					// Simple Index Object: (optional, recommended, one per video stream)
					// Field Name                       Field Type   Size (bits)
					// Object ID                        GUID         128             // GUID for Simple Index object - GETID3_ASF_Data_Object
					// Object Size                      QWORD        64              // size of Simple Index object, including 56 bytes of Simple Index Object header
					// File ID                          GUID         128             // unique identifier. may be zero or identical to File ID field in Data Object and Header Object
					// Index Entry Time Interval        QWORD        64              // interval between index entries in 100-nanosecond units
					// Maximum Packet Count             DWORD        32              // maximum packet count for all index entries
					// Index Entries Count              DWORD        32              // number of Index Entries structures
					// Index Entries                    array of:    variable        //
					// * Packet Number                  DWORD        32              // number of the Data Packet associated with this index entry
					// * Packet Count                   WORD         16              // number of Data Packets to sent at this index entry

// shortcut
					$thisfile_asf['simple_index_object'] = array();
					$thisfile_asf_simpleindexobject      = &$thisfile_asf['simple_index_object'];

$SimpleIndexObjectData = $NextObjectDataHeader.$this->fread(56 - 24);
					$offset = 24;

$thisfile_asf_simpleindexobject['objectid']                  = $NextObjectGUID;
					$thisfile_asf_simpleindexobject['objectid_guid']             = $NextObjectGUIDtext;
					$thisfile_asf_simpleindexobject['objectsize']                = $NextObjectSize;

$thisfile_asf_simpleindexobject['fileid']                    =                  substr($SimpleIndexObjectData, $offset, 16);
					$offset += 16;
					$thisfile_asf_simpleindexobject['fileid_guid']               = $this->BytestringToGUID($thisfile_asf_simpleindexobject['fileid']);
					$thisfile_asf_simpleindexobject['index_entry_time_interval'] = getid3_lib::LittleEndian2Int(substr($SimpleIndexObjectData, $offset, 8));
					$offset += 8;
					$thisfile_asf_simpleindexobject['maximum_packet_count']      = getid3_lib::LittleEndian2Int(substr($SimpleIndexObjectData, $offset, 4));
					$offset += 4;
					$thisfile_asf_simpleindexobject['index_entries_count']       = getid3_lib::LittleEndian2Int(substr($SimpleIndexObjectData, $offset, 4));
					/** @var int|float|false $totalIndexEntriesCount */
					$totalIndexEntriesCount = $thisfile_asf_simpleindexobject['index_entries_count'];
					$offset += 4;

$IndexEntriesData = $SimpleIndexObjectData.$this->fread(6 * $totalIndexEntriesCount);
					for ($IndexEntriesCounter = 0; $IndexEntriesCounter < $totalIndexEntriesCount; $IndexEntriesCounter++) {
						$thisfile_asf_simpleindexobject['index_entries'][$IndexEntriesCounter]                  = array();
						$thisfile_asf_simpleindexobject['index_entries'][$IndexEntriesCounter]['packet_number'] = getid3_lib::LittleEndian2Int(substr($IndexEntriesData, $offset, 4));
						$offset += 4;
						$thisfile_asf_simpleindexobject['index_entries'][$IndexEntriesCounter]['packet_count']  = getid3_lib::LittleEndian2Int(substr($IndexEntriesData, $offset, 4));
						$offset += 2;
					}

break;

case GETID3_ASF_Index_Object:
					// 6.2 ASF top-level Index Object (optional but recommended when appropriate, 0 or 1)
					// Field Name                       Field Type   Size (bits)
					// Object ID                        GUID         128             // GUID for the Index Object - GETID3_ASF_Index_Object
					// Object Size                      QWORD        64              // Specifies the size, in bytes, of the Index Object, including at least 34 bytes of Index Object header
					// Index Entry Time Interval        DWORD        32              // Specifies the time interval between each index entry in ms.
					// Index Specifiers Count           WORD         16              // Specifies the number of Index Specifiers structures in this Index Object.
					// Index Blocks Count               DWORD        32              // Specifies the number of Index Blocks structures in this Index Object.

// Index Entry Time Interval        DWORD        32              // Specifies the time interval between index entries in milliseconds.  This value cannot be 0.
					// Index Specifiers Count           WORD         16              // Specifies the number of entries in the Index Specifiers list.  Valid values are 1 and greater.
					// Index Specifiers                 array of:    varies          //
					// * Stream Number                  WORD         16              // Specifies the stream number that the Index Specifiers refer to. Valid values are between 1 and 127.
					// * Index Type                     WORD         16              // Specifies Index Type values as follows:
																					//   1 = Nearest Past Data Packet - indexes point to the data packet whose presentation time is closest to the index entry time.
																					//   2 = Nearest Past Media Object - indexes point to the closest data packet containing an entire object or first fragment of an object.
																					//   3 = Nearest Past Cleanpoint. - indexes point to the closest data packet containing an entire object (or first fragment of an object) that has the Cleanpoint Flag set.
																					//   Nearest Past Cleanpoint is the most common type of index.
					// Index Entry Count                DWORD        32              // Specifies the number of Index Entries in the block.
					// * Block Positions                QWORD        varies          // Specifies a list of byte offsets of the beginnings of the blocks relative to the beginning of the first Data Packet (i.e., the beginning of the Data Object + 50 bytes). The number of entries in this list is specified by the value of the Index Specifiers Count field. The order of those byte offsets is tied to the order in which Index Specifiers are listed.
					// * Index Entries                  array of:    varies          //
					// * * Offsets                      DWORD        varies          // An offset value of 0xffffffff indicates an invalid offset value

// shortcut
					$thisfile_asf['asf_index_object'] = array();
					$thisfile_asf_asfindexobject      = &$thisfile_asf['asf_index_object'];

$ASFIndexObjectData = $NextObjectDataHeader.$this->fread(34 - 24);
					$offset = 24;

$thisfile_asf_asfindexobject['objectid']                  = $NextObjectGUID;
					$thisfile_asf_asfindexobject['objectid_guid']             = $NextObjectGUIDtext;
					$thisfile_asf_asfindexobject['objectsize']                = $NextObjectSize;

$thisfile_asf_asfindexobject['entry_time_interval']       = getid3_lib::LittleEndian2Int(substr($ASFIndexObjectData, $offset, 4));
					$offset += 4;
					$thisfile_asf_asfindexobject['index_specifiers_count']    = getid3_lib::LittleEndian2Int(substr($ASFIndexObjectData, $offset, 2));
					$offset += 2;
					$thisfile_asf_asfindexobject['index_blocks_count']        = getid3_lib::LittleEndian2Int(substr($ASFIndexObjectData, $offset, 4));
					$offset += 4;

$ASFIndexObjectData .= $this->fread(4 * $thisfile_asf_asfindexobject['index_specifiers_count']);
					for ($IndexSpecifiersCounter = 0; $IndexSpecifiersCounter < (int) $thisfile_asf_asfindexobject['index_specifiers_count']; $IndexSpecifiersCounter++) {
						$IndexSpecifierStreamNumber = getid3_lib::LittleEndian2Int(substr($ASFIndexObjectData, $offset, 2));
						$offset += 2;
						$thisfile_asf_asfindexobject['index_specifiers'][$IndexSpecifiersCounter]                    = array();
						$thisfile_asf_asfindexobject['index_specifiers'][$IndexSpecifiersCounter]['stream_number']   = $IndexSpecifierStreamNumber;
						$thisfile_asf_asfindexobject['index_specifiers'][$IndexSpecifiersCounter]['index_type']      = getid3_lib::LittleEndian2Int(substr($ASFIndexObjectData, $offset, 2));
						$offset += 2;
						$thisfile_asf_asfindexobject['index_specifiers'][$IndexSpecifiersCounter]['index_type_text'] = $this->ASFIndexObjectIndexTypeLookup($thisfile_asf_asfindexobject['index_specifiers'][$IndexSpecifiersCounter]['index_type']);
					}

$ASFIndexObjectData .= $this->fread(4);
					$thisfile_asf_asfindexobject['index_entry_count'] = getid3_lib::LittleEndian2Int(substr($ASFIndexObjectData, $offset, 4));
					/** @var int|float|false $totalIndexEntryCount */
					$totalIndexEntryCount = $thisfile_asf_asfindexobject['index_entry_count'];
					$offset += 4;

$ASFIndexObjectData .= $this->fread(8 * $thisfile_asf_asfindexobject['index_specifiers_count']);
					for ($IndexSpecifiersCounter = 0; $IndexSpecifiersCounter < (int) $thisfile_asf_asfindexobject['index_specifiers_count']; $IndexSpecifiersCounter++) {
						$thisfile_asf_asfindexobject['block_positions'][$IndexSpecifiersCounter] = getid3_lib::LittleEndian2Int(substr($ASFIndexObjectData, $offset, 8));
						$offset += 8;
					}

$ASFIndexObjectData .= $this->fread(4 * $thisfile_asf_asfindexobject['index_specifiers_count'] * $thisfile_asf_asfindexobject['index_entry_count']);
					for ($IndexEntryCounter = 0; $IndexEntryCounter < $totalIndexEntryCount; $IndexEntryCounter++) {
						for ($IndexSpecifiersCounter = 0; $IndexSpecifiersCounter < (int) $thisfile_asf_asfindexobject['index_specifiers_count']; $IndexSpecifiersCounter++) {
							$thisfile_asf_asfindexobject['offsets'][$IndexSpecifiersCounter][$IndexEntryCounter] = getid3_lib::LittleEndian2Int(substr($ASFIndexObjectData, $offset, 4));
							$offset += 4;
						}
					}
					break;

if (isset($thisfile_asf_codeclistobject['codec_entries']) && is_array($thisfile_asf_codeclistobject['codec_entries'])) {
			foreach ($thisfile_asf_codeclistobject['codec_entries'] as $streamnumber => $streamdata) {
				switch ($streamdata['information']) {
					case 'WMV1':
					case 'WMV2':
					case 'WMV3':
					case 'MSS1':
					case 'MSS2':
					case 'WMVA':
					case 'WVC1':
					case 'WMVP':
					case 'WVP2':
						$thisfile_video['dataformat'] = 'wmv';
						$info['mime_type'] = 'video/x-ms-wmv';
						break;

case 'MP42':
					case 'MP43':
					case 'MP4S':
					case 'mp4s':
						$thisfile_video['dataformat'] = 'asf';
						$info['mime_type'] = 'video/x-ms-asf';
						break;

default:
						switch ($streamdata['type_raw']) {
							case 1:
								if (strstr($this->TrimConvert($streamdata['name']), 'Windows Media')) {
									$thisfile_video['dataformat'] = 'wmv';
									if ($info['mime_type'] == 'video/x-ms-asf') {
										$info['mime_type'] = 'video/x-ms-wmv';
									}
								}
								break;

case 2:
								if (strstr($this->TrimConvert($streamdata['name']), 'Windows Media')) {
									$thisfile_audio['dataformat'] = 'wma';
									if ($info['mime_type'] == 'video/x-ms-asf') {
										$info['mime_type'] = 'audio/x-ms-wma';
									}
								}
								break;

}
						break;
				}
			}
		}

switch (isset($thisfile_audio['codec']) ? $thisfile_audio['codec'] : '') {
			case 'MPEG Layer-3':
				$thisfile_audio['dataformat'] = 'mp3';
				break;

default:
				break;
		}

if (isset($thisfile_asf_codeclistobject['codec_entries'])) {
			foreach ($thisfile_asf_codeclistobject['codec_entries'] as $streamnumber => $streamdata) {
				switch ($streamdata['type_raw']) {

case 1: // video
						$thisfile_video['encoder'] = $this->TrimConvert($thisfile_asf_codeclistobject['codec_entries'][$streamnumber]['name']);
						break;

case 2: // audio
						$thisfile_audio['encoder'] = $this->TrimConvert($thisfile_asf_codeclistobject['codec_entries'][$streamnumber]['name']);

// AH 2003-10-01
						$thisfile_audio['encoder_options'] = $this->TrimConvert($thisfile_asf_codeclistobject['codec_entries'][0]['description']);

$thisfile_audio['codec']   = $thisfile_audio['encoder'];
						break;

default:
						$this->warning('Unknown streamtype: [codec_list_object][codec_entries]['.$streamnumber.'][type_raw] == '.$streamdata['type_raw']);
						break;

}
			}
		}

if (isset($info['audio'])) {
			$thisfile_audio['lossless']           = (isset($thisfile_audio['lossless'])           ? $thisfile_audio['lossless']           : false);
			$thisfile_audio['dataformat']         = (!empty($thisfile_audio['dataformat'])        ? $thisfile_audio['dataformat']         : 'asf');
		}
		if (!empty($thisfile_video['dataformat'])) {
			$thisfile_video['lossless']           = (isset($thisfile_audio['lossless'])           ? $thisfile_audio['lossless']           : false);
			$thisfile_video['pixel_aspect_ratio'] = (isset($thisfile_audio['pixel_aspect_ratio']) ? $thisfile_audio['pixel_aspect_ratio'] : (float) 1);
			$thisfile_video['dataformat']         = (!empty($thisfile_video['dataformat'])        ? $thisfile_video['dataformat']         : 'asf');
		}
		if (!empty($thisfile_video['streams'])) {
			$thisfile_video['resolution_x'] = 0;
			$thisfile_video['resolution_y'] = 0;
			foreach ($thisfile_video['streams'] as $key => $valuearray) {
				if (($valuearray['resolution_x'] > $thisfile_video['resolution_x']) || ($valuearray['resolution_y'] > $thisfile_video['resolution_y'])) {
					$thisfile_video['resolution_x'] = $valuearray['resolution_x'];
					$thisfile_video['resolution_y'] = $valuearray['resolution_y'];
				}
			}
		}
		$info['bitrate'] = 0 + (isset($thisfile_audio['bitrate']) ? $thisfile_audio['bitrate'] : 0) + (isset($thisfile_video['bitrate']) ? $thisfile_video['bitrate'] : 0);

if ((!isset($info['playtime_seconds']) || ($info['playtime_seconds'] <= 0)) && ($info['bitrate'] > 0)) {
			$info['playtime_seconds'] = ($info['filesize'] - $info['avdataoffset']) / ($info['bitrate'] / 8);
		}

return true;
	}

/**
	 * @param int $CodecListType
	 *
	 * @return string
	 */
	public static function codecListObjectTypeLookup($CodecListType) {
		static $lookup = array(
			0x0001 => 'Video Codec',
			0x0002 => 'Audio Codec',
			0xFFFF => 'Unknown Codec'
		);

return (isset($lookup[$CodecListType]) ? $lookup[$CodecListType] : 'Invalid Codec Type');
	}

/**
	 * @return array
	 */
	public static function KnownGUIDs() {
		static $GUIDarray = array(
			'GETID3_ASF_Extended_Stream_Properties_Object'   => '14E6A5CB-C672-4332-8399-A96952065B5A',
			'GETID3_ASF_Padding_Object'                      => '1806D474-CADF-4509-A4BA-9AABCB96AAE8',
			'GETID3_ASF_Payload_Ext_Syst_Pixel_Aspect_Ratio' => '1B1EE554-F9EA-4BC8-821A-376B74E4C4B8',
			'GETID3_ASF_Script_Command_Object'               => '1EFB1A30-0B62-11D0-A39B-00A0C90348F6',
			'GETID3_ASF_No_Error_Correction'                 => '20FB5700-5B55-11CF-A8FD-00805F5C442B',
			'GETID3_ASF_Content_Branding_Object'             => '2211B3FA-BD23-11D2-B4B7-00A0C955FC6E',
			'GETID3_ASF_Content_Encryption_Object'           => '2211B3FB-BD23-11D2-B4B7-00A0C955FC6E',
			'GETID3_ASF_Digital_Signature_Object'            => '2211B3FC-BD23-11D2-B4B7-00A0C955FC6E',
			'GETID3_ASF_Extended_Content_Encryption_Object'  => '298AE614-2622-4C17-B935-DAE07EE9289C',
			'GETID3_ASF_Simple_Index_Object'                 => '33000890-E5B1-11CF-89F4-00A0C90349CB',
			'GETID3_ASF_Degradable_JPEG_Media'               => '35907DE0-E415-11CF-A917-00805F5C442B',
			'GETID3_ASF_Payload_Extension_System_Timecode'   => '399595EC-8667-4E2D-8FDB-98814CE76C1E',
			'GETID3_ASF_Binary_Media'                        => '3AFB65E2-47EF-40F2-AC2C-70A90D71D343',
			'GETID3_ASF_Timecode_Index_Object'               => '3CB73FD0-0C4A-4803-953D-EDF7B6228F0C',
			'GETID3_ASF_Metadata_Library_Object'             => '44231C94-9498-49D1-A141-1D134E457054',
			'GETID3_ASF_Reserved_3'                          => '4B1ACBE3-100B-11D0-A39B-00A0C90348F6',
			'GETID3_ASF_Reserved_4'                          => '4CFEDB20-75F6-11CF-9C0F-00A0C90349CB',
			'GETID3_ASF_Command_Media'                       => '59DACFC0-59E6-11D0-A3AC-00A0C90348F6',
			'GETID3_ASF_Header_Extension_Object'             => '5FBF03B5-A92E-11CF-8EE3-00C00C205365',
			'GETID3_ASF_Media_Object_Index_Parameters_Obj'   => '6B203BAD-3F11-4E84-ACA8-D7613DE2CFA7',
			'GETID3_ASF_Header_Object'                       => '75B22630-668E-11CF-A6D9-00AA0062CE6C',
			'GETID3_ASF_Content_Description_Object'          => '75B22633-668E-11CF-A6D9-00AA0062CE6C',
			'GETID3_ASF_Error_Correction_Object'             => '75B22635-668E-11CF-A6D9-00AA0062CE6C',
			'GETID3_ASF_Data_Object'                         => '75B22636-668E-11CF-A6D9-00AA0062CE6C',
			'GETID3_ASF_Web_Stream_Media_Subtype'            => '776257D4-C627-41CB-8F81-7AC7FF1C40CC',
			'GETID3_ASF_Stream_Bitrate_Properties_Object'    => '7BF875CE-468D-11D1-8D82-006097C9A2B2',
			'GETID3_ASF_Language_List_Object'                => '7C4346A9-EFE0-4BFC-B229-393EDE415C85',
			'GETID3_ASF_Codec_List_Object'                   => '86D15240-311D-11D0-A3A4-00A0C90348F6',
			'GETID3_ASF_Reserved_2'                          => '86D15241-311D-11D0-A3A4-00A0C90348F6',
			'GETID3_ASF_File_Properties_Object'              => '8CABDCA1-A947-11CF-8EE4-00C00C205365',
			'GETID3_ASF_File_Transfer_Media'                 => '91BD222C-F21C-497A-8B6D-5AA86BFC0185',
			'GETID3_ASF_Old_RTP_Extension_Data'              => '96800C63-4C94-11D1-837B-0080C7A37F95',
			'GETID3_ASF_Advanced_Mutual_Exclusion_Object'    => 'A08649CF-4775-4670-8A16-6E35357566CD',
			'GETID3_ASF_Bandwidth_Sharing_Object'            => 'A69609E6-517B-11D2-B6AF-00C04FD908E9',
			'GETID3_ASF_Reserved_1'                          => 'ABD3D211-A9BA-11cf-8EE6-00C00C205365',
			'GETID3_ASF_Bandwidth_Sharing_Exclusive'         => 'AF6060AA-5197-11D2-B6AF-00C04FD908E9',
			'GETID3_ASF_Bandwidth_Sharing_Partial'           => 'AF6060AB-5197-11D2-B6AF-00C04FD908E9',
			'GETID3_ASF_JFIF_Media'                          => 'B61BE100-5B4E-11CF-A8FD-00805F5C442B',
			'GETID3_ASF_Stream_Properties_Object'            => 'B7DC0791-A9B7-11CF-8EE6-00C00C205365',
			'GETID3_ASF_Video_Media'                         => 'BC19EFC0-5B4D-11CF-A8FD-00805F5C442B',
			'GETID3_ASF_Audio_Spread'                        => 'BFC3CD50-618F-11CF-8BB2-00AA00B4E220',
			'GETID3_ASF_Metadata_Object'                     => 'C5F8CBEA-5BAF-4877-8467-AA8C44FA4CCA',
			'GETID3_ASF_Payload_Ext_Syst_Sample_Duration'    => 'C6BD9450-867F-4907-83A3-C77921B733AD',
			'GETID3_ASF_Group_Mutual_Exclusion_Object'       => 'D1465A40-5A79-4338-B71B-E36B8FD6C249',
			'GETID3_ASF_Extended_Content_Description_Object' => 'D2D0A440-E307-11D2-97F0-00A0C95EA850',
			'GETID3_ASF_Stream_Prioritization_Object'        => 'D4FED15B-88D3-454F-81F0-ED5C45999E24',
			'GETID3_ASF_Payload_Ext_System_Content_Type'     => 'D590DC20-07BC-436C-9CF7-F3BBFBF1A4DC',
			'GETID3_ASF_Old_File_Properties_Object'          => 'D6E229D0-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_ASF_Header_Object'               => 'D6E229D1-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_ASF_Data_Object'                 => 'D6E229D2-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Index_Object'                        => 'D6E229D3-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Stream_Properties_Object'        => 'D6E229D4-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Content_Description_Object'      => 'D6E229D5-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Script_Command_Object'           => 'D6E229D6-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Marker_Object'                   => 'D6E229D7-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Component_Download_Object'       => 'D6E229D8-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Stream_Group_Object'             => 'D6E229D9-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Scalable_Object'                 => 'D6E229DA-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Prioritization_Object'           => 'D6E229DB-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Bitrate_Mutual_Exclusion_Object'     => 'D6E229DC-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Inter_Media_Dependency_Object'   => 'D6E229DD-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Rating_Object'                   => 'D6E229DE-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Index_Parameters_Object'             => 'D6E229DF-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Color_Table_Object'              => 'D6E229E0-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Language_List_Object'            => 'D6E229E1-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Audio_Media'                     => 'D6E229E2-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Video_Media'                     => 'D6E229E3-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Image_Media'                     => 'D6E229E4-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Timecode_Media'                  => 'D6E229E5-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Text_Media'                      => 'D6E229E6-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_MIDI_Media'                      => 'D6E229E7-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Command_Media'                   => 'D6E229E8-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_No_Error_Concealment'            => 'D6E229EA-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Scrambled_Audio'                 => 'D6E229EB-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_No_Color_Table'                  => 'D6E229EC-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_SMPTE_Time'                      => 'D6E229ED-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_ASCII_Text'                      => 'D6E229EE-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Unicode_Text'                    => 'D6E229EF-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_HTML_Text'                       => 'D6E229F0-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_URL_Command'                     => 'D6E229F1-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Filename_Command'                => 'D6E229F2-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_ACM_Codec'                       => 'D6E229F3-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_VCM_Codec'                       => 'D6E229F4-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_QuickTime_Codec'                 => 'D6E229F5-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_DirectShow_Transform_Filter'     => 'D6E229F6-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_DirectShow_Rendering_Filter'     => 'D6E229F7-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_No_Enhancement'                  => 'D6E229F8-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Unknown_Enhancement_Type'        => 'D6E229F9-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Temporal_Enhancement'            => 'D6E229FA-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Spatial_Enhancement'             => 'D6E229FB-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Quality_Enhancement'             => 'D6E229FC-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Number_of_Channels_Enhancement'  => 'D6E229FD-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Frequency_Response_Enhancement'  => 'D6E229FE-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Media_Object'                    => 'D6E229FF-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Mutex_Language'                      => 'D6E22A00-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Mutex_Bitrate'                       => 'D6E22A01-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Mutex_Unknown'                       => 'D6E22A02-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_ASF_Placeholder_Object'          => 'D6E22A0E-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Old_Data_Unit_Extension_Object'      => 'D6E22A0F-35DA-11D1-9034-00A0C90349BE',
			'GETID3_ASF_Web_Stream_Format'                   => 'DA1E6B13-8359-4050-B398-388E965BF00C',
			'GETID3_ASF_Payload_Ext_System_File_Name'        => 'E165EC0E-19ED-45D7-B4A7-25CBD1E28E9B',
			'GETID3_ASF_Marker_Object'                       => 'F487CD01-A951-11CF-8EE6-00C00C205365',
			'GETID3_ASF_Timecode_Index_Parameters_Object'    => 'F55E496D-9797-4B5D-8C8B-604DFE9BFB24',
			'GETID3_ASF_Audio_Media'                         => 'F8699E40-5B4D-11CF-A8FD-00805F5C442B',
			'GETID3_ASF_Media_Object_Index_Object'           => 'FEB103F8-12AD-4C64-840F-2A1D2F7AD48C',
			'GETID3_ASF_Alt_Extended_Content_Encryption_Obj' => 'FF889EF1-ADEE-40DA-9E71-98704BB928CE',
			'GETID3_ASF_Index_Placeholder_Object'            => 'D9AADE20-7C17-4F9C-BC28-8555DD98E2A2', // https://metacpan.org/dist/Audio-WMA/source/WMA.pm
			'GETID3_ASF_Compatibility_Object'                => '26F18B5D-4584-47EC-9F5F-0E651F0452C9', // https://metacpan.org/dist/Audio-WMA/source/WMA.pm
			'GETID3_ASF_Media_Object_Index_Parameters_Object'=> '6B203BAD-3F11-48E4-ACA8-D7613DE2CFA7',
		);
		return $GUIDarray;
	}

/**
	 * @param string $GUIDstring
	 *
	 * @return string|false
	 */
	public static function GUIDname($GUIDstring) {
		static $GUIDarray = array();
		if (empty($GUIDarray)) {
			$GUIDarray = self::KnownGUIDs();
		}
		return array_search($GUIDstring, $GUIDarray);
	}

/**
	 * @param int $id
	 *
	 * @return string
	 */
	public static function ASFIndexObjectIndexTypeLookup($id) {
		static $ASFIndexObjectIndexTypeLookup = array();
		if (empty($ASFIndexObjectIndexTypeLookup)) {
			$ASFIndexObjectIndexTypeLookup[1] = 'Nearest Past Data Packet';
			$ASFIndexObjectIndexTypeLookup[2] = 'Nearest Past Media Object';
			$ASFIndexObjectIndexTypeLookup[3] = 'Nearest Past Cleanpoint';
		}
		return (isset($ASFIndexObjectIndexTypeLookup[$id]) ? $ASFIndexObjectIndexTypeLookup[$id] : 'invalid');
	}

/**
	 * @param string $GUIDstring
	 *
	 * @return string
	 */
	public static function GUIDtoBytestring($GUIDstring) {
		// Microsoft defines these 16-byte (128-bit) GUIDs in the strangest way:
		// first 4 bytes are in little-endian order
		// next 2 bytes are appended in little-endian order
		// next 2 bytes are appended in little-endian order
		// next 2 bytes are appended in big-endian order
		// next 6 bytes are appended in big-endian order

// AaBbCcDd-EeFf-GgHh-IiJj-KkLlMmNnOoPp is stored as this 16-byte string:
		// $Dd $Cc $Bb $Aa $Ff $Ee $Hh $Gg $Ii $Jj $Kk $Ll $Mm $Nn $Oo $Pp

$hexbytecharstring  = chr(hexdec(substr($GUIDstring,  6, 2)));
		$hexbytecharstring .= chr(hexdec(substr($GUIDstring,  4, 2)));
		$hexbytecharstring .= chr(hexdec(substr($GUIDstring,  2, 2)));
		$hexbytecharstring .= chr(hexdec(substr($GUIDstring,  0, 2)));

$hexbytecharstring .= chr(hexdec(substr($GUIDstring, 11, 2)));
		$hexbytecharstring .= chr(hexdec(substr($GUIDstring,  9, 2)));

$hexbytecharstring .= chr(hexdec(substr($GUIDstring, 16, 2)));
		$hexbytecharstring .= chr(hexdec(substr($GUIDstring, 14, 2)));

$hexbytecharstring .= chr(hexdec(substr($GUIDstring, 19, 2)));
		$hexbytecharstring .= chr(hexdec(substr($GUIDstring, 21, 2)));

$hexbytecharstring .= chr(hexdec(substr($GUIDstring, 24, 2)));
		$hexbytecharstring .= chr(hexdec(substr($GUIDstring, 26, 2)));
		$hexbytecharstring .= chr(hexdec(substr($GUIDstring, 28, 2)));
		$hexbytecharstring .= chr(hexdec(substr($GUIDstring, 30, 2)));
		$hexbytecharstring .= chr(hexdec(substr($GUIDstring, 32, 2)));
		$hexbytecharstring .= chr(hexdec(substr($GUIDstring, 34, 2)));

return $hexbytecharstring;
	}

/**
	 * @param string $Bytestring
	 *
	 * @return string
	 */
	public static function BytestringToGUID($Bytestring) {
		$GUIDstring  = str_pad(dechex(ord($Bytestring[3])),  2, '0', STR_PAD_LEFT);
		$GUIDstring .= str_pad(dechex(ord($Bytestring[2])),  2, '0', STR_PAD_LEFT);
		$GUIDstring .= str_pad(dechex(ord($Bytestring[1])),  2, '0', STR_PAD_LEFT);
		$GUIDstring .= str_pad(dechex(ord($Bytestring[0])),  2, '0', STR_PAD_LEFT);
		$GUIDstring .= '-';
		$GUIDstring .= str_pad(dechex(ord($Bytestring[5])),  2, '0', STR_PAD_LEFT);
		$GUIDstring .= str_pad(dechex(ord($Bytestring[4])),  2, '0', STR_PAD_LEFT);
		$GUIDstring .= '-';
		$GUIDstring .= str_pad(dechex(ord($Bytestring[7])),  2, '0', STR_PAD_LEFT);
		$GUIDstring .= str_pad(dechex(ord($Bytestring[6])),  2, '0', STR_PAD_LEFT);
		$GUIDstring .= '-';
		$GUIDstring .= str_pad(dechex(ord($Bytestring[8])),  2, '0', STR_PAD_LEFT);
		$GUIDstring .= str_pad(dechex(ord($Bytestring[9])),  2, '0', STR_PAD_LEFT);
		$GUIDstring .= '-';
		$GUIDstring .= str_pad(dechex(ord($Bytestring[10])), 2, '0', STR_PAD_LEFT);
		$GUIDstring .= str_pad(dechex(ord($Bytestring[11])), 2, '0', STR_PAD_LEFT);
		$GUIDstring .= str_pad(dechex(ord($Bytestring[12])), 2, '0', STR_PAD_LEFT);
		$GUIDstring .= str_pad(dechex(ord($Bytestring[13])), 2, '0', STR_PAD_LEFT);
		$GUIDstring .= str_pad(dechex(ord($Bytestring[14])), 2, '0', STR_PAD_LEFT);
		$GUIDstring .= str_pad(dechex(ord($Bytestring[15])), 2, '0', STR_PAD_LEFT);

return strtoupper($GUIDstring);
	}

/**
	 * @param int  $FILETIME
	 * @param bool $round
	 *
	 * @return float|int
	 */
	public static function FILETIMEtoUNIXtime($FILETIME, $round=true) {
		// FILETIME is a 64-bit unsigned integer representing
		// the number of 100-nanosecond intervals since January 1, 1601
		// UNIX timestamp is number of seconds since January 1, 1970
		// 116444736000000000 = 10000000 * 60 * 60 * 24 * 365 * 369 + 89 leap days
		if ($round) {
			return intval(round(($FILETIME - 116444736000000000) / 10000000));
		}
		return ($FILETIME - 116444736000000000) / 10000000;
	}

/**
	 * @param int $WMpictureType
	 *
	 * @return string
	 */
	public static function WMpictureTypeLookup($WMpictureType) {
		static $lookup = null;
		if ($lookup === null) {
			$lookup = array(
				0x03 => 'Front Cover',
				0x04 => 'Back Cover',
				0x00 => 'User Defined',
				0x05 => 'Leaflet Page',
				0x06 => 'Media Label',
				0x07 => 'Lead Artist',
				0x08 => 'Artist',
				0x09 => 'Conductor',
				0x0A => 'Band',
				0x0B => 'Composer',
				0x0C => 'Lyricist',
				0x0D => 'Recording Location',
				0x0E => 'During Recording',
				0x0F => 'During Performance',
				0x10 => 'Video Screen Capture',
				0x12 => 'Illustration',
				0x13 => 'Band Logotype',
				0x14 => 'Publisher Logotype'
			);
			$lookup = array_map(function($str) {
				return getid3_lib::iconv_fallback('UTF-8', 'UTF-16LE', $str);
			}, $lookup);
		}

return (isset($lookup[$WMpictureType]) ? $lookup[$WMpictureType] : '');
	}

/**
	 * @param string $asf_header_extension_object_data
	 * @param int    $unhandled_sections
	 *
	 * @return array
	 */
	public function HeaderExtensionObjectDataParse(&$asf_header_extension_object_data, &$unhandled_sections) {
		// https://web.archive.org/web/20140419205228/http://msdn.microsoft.com/en-us/library/bb643323.aspx

$offset = 0;
		$objectOffset = 0;
		$HeaderExtensionObjectParsed = array();
		while ($objectOffset < strlen($asf_header_extension_object_data)) {
			$offset = $objectOffset;
			$thisObject = array();

$thisObject['guid']                              =                              substr($asf_header_extension_object_data, $offset, 16);
			$offset += 16;
			$thisObject['guid_text'] = $this->BytestringToGUID($thisObject['guid']);
			$thisObject['guid_name'] = $this->GUIDname($thisObject['guid_text']);

$thisObject['size']                              = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  8));
			$offset += 8;
			if ($thisObject['size'] <= 0) {
				break;
			}

switch ($thisObject['guid']) {
				case GETID3_ASF_Extended_Stream_Properties_Object:
					$thisObject['start_time']                        = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  8));
					$offset += 8;
					$thisObject['start_time_unix']                   = $this->FILETIMEtoUNIXtime($thisObject['start_time']);

$thisObject['end_time']                          = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  8));
					$offset += 8;
					$thisObject['end_time_unix']                     = $this->FILETIMEtoUNIXtime($thisObject['end_time']);

$thisObject['data_bitrate']                      = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  4));
					$offset += 4;

$thisObject['buffer_size']                       = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  4));
					$offset += 4;

$thisObject['initial_buffer_fullness']           = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  4));
					$offset += 4;

$thisObject['alternate_data_bitrate']            = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  4));
					$offset += 4;

$thisObject['alternate_buffer_size']             = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  4));
					$offset += 4;

$thisObject['alternate_initial_buffer_fullness'] = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  4));
					$offset += 4;

$thisObject['maximum_object_size']               = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  4));
					$offset += 4;

$thisObject['flags_raw']                         = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  4));
					$offset += 4;
					$thisObject['flags']['reliable']                = (bool) $thisObject['flags_raw'] & 0x00000001;
					$thisObject['flags']['seekable']                = (bool) $thisObject['flags_raw'] & 0x00000002;
					$thisObject['flags']['no_cleanpoints']          = (bool) $thisObject['flags_raw'] & 0x00000004;
					$thisObject['flags']['resend_live_cleanpoints'] = (bool) $thisObject['flags_raw'] & 0x00000008;

$thisObject['stream_number']                     = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
					$offset += 2;

$thisObject['stream_language_id_index']          = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
					$offset += 2;

$thisObject['average_time_per_frame']            = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  8));
					$offset += 8;

$thisObject['stream_name_count']                 = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
					$offset += 2;

$thisObject['payload_extension_system_count']    = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
					$offset += 2;

for ($i = 0; $i < $thisObject['stream_name_count']; $i++) {
						$streamName = array();

$streamName['language_id_index']             = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
						$offset += 2;

$streamName['stream_name_length']            = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
						$offset += 2;

$streamName['stream_name']                   =                              substr($asf_header_extension_object_data, $offset,  $streamName['stream_name_length']);
						$offset += $streamName['stream_name_length'];

$thisObject['stream_names'][$i] = $streamName;
					}

for ($i = 0; $i < $thisObject['payload_extension_system_count']; $i++) {
						$payloadExtensionSystem = array();

$payloadExtensionSystem['extension_system_id']   =                              substr($asf_header_extension_object_data, $offset, 16);
						$offset += 16;
						$payloadExtensionSystem['extension_system_id_text'] = $this->BytestringToGUID($payloadExtensionSystem['extension_system_id']);

$payloadExtensionSystem['extension_system_size'] = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
						$offset += 2;
						if ($payloadExtensionSystem['extension_system_size'] <= 0) {
							break 2;
						}

$payloadExtensionSystem['extension_system_info_length'] = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  4));
						$offset += 4;

$payloadExtensionSystem['extension_system_info'] = substr($asf_header_extension_object_data, $offset,  $payloadExtensionSystem['extension_system_info_length']);
						$offset += $payloadExtensionSystem['extension_system_info_length'];

$thisObject['payload_extension_systems'][$i] = $payloadExtensionSystem;
					}

break;

case GETID3_ASF_Advanced_Mutual_Exclusion_Object:
					$thisObject['exclusion_type']       = substr($asf_header_extension_object_data, $offset, 16);
					$offset += 16;
					$thisObject['exclusion_type_text']  = $this->BytestringToGUID($thisObject['exclusion_type']);

$thisObject['stream_numbers_count'] = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
					$offset += 2;

for ($i = 0; $i < $thisObject['stream_numbers_count']; $i++) {
						$thisObject['stream_numbers'][$i] = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
						$offset += 2;
					}

break;

case GETID3_ASF_Stream_Prioritization_Object:
					$thisObject['priority_records_count'] = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
					$offset += 2;

for ($i = 0; $i < $thisObject['priority_records_count']; $i++) {
						$priorityRecord = array();

$priorityRecord['stream_number'] = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
						$offset += 2;

$priorityRecord['flags_raw']     = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset, 2));
						$offset += 2;
						$priorityRecord['flags']['mandatory'] = (bool) $priorityRecord['flags_raw'] & 0x00000001;

$thisObject['priority_records'][$i] = $priorityRecord;
					}

break;

case GETID3_ASF_Padding_Object:
					// padding, skip it
					break;

case GETID3_ASF_Metadata_Object:
					$thisObject['description_record_counts'] = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
					$offset += 2;

for ($i = 0; $i < $thisObject['description_record_counts']; $i++) {
						$descriptionRecord = array();

$descriptionRecord['reserved_1']         = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2)); // must be zero
						$offset += 2;

$descriptionRecord['stream_number']      = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
						$offset += 2;

$descriptionRecord['name_length']        = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
						$offset += 2;

$descriptionRecord['data_type']          = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
						$offset += 2;
						$descriptionRecord['data_type_text'] = self::metadataLibraryObjectDataTypeLookup($descriptionRecord['data_type']);

$descriptionRecord['data_length']        = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  4));
						$offset += 4;

$descriptionRecord['name']               =                              substr($asf_header_extension_object_data, $offset,  $descriptionRecord['name_length']);
						$offset += $descriptionRecord['name_length'];

$descriptionRecord['data']               =                              substr($asf_header_extension_object_data, $offset,  $descriptionRecord['data_length']);
						$offset += $descriptionRecord['data_length'];
						switch ($descriptionRecord['data_type']) {
							case 0x0000: // Unicode string
								break;

case 0x0001: // BYTE array
								// do nothing
								break;

case 0x0002: // BOOL
								$descriptionRecord['data'] = (bool) getid3_lib::LittleEndian2Int($descriptionRecord['data']);
								break;

case 0x0003: // DWORD
							case 0x0004: // QWORD
							case 0x0005: // WORD
								$descriptionRecord['data'] = getid3_lib::LittleEndian2Int($descriptionRecord['data']);
								break;

case 0x0006: // GUID
								$descriptionRecord['data_text'] = $this->BytestringToGUID($descriptionRecord['data']);
								break;
						}

$thisObject['description_record'][$i] = $descriptionRecord;
					}
					break;

case GETID3_ASF_Language_List_Object:
					$thisObject['language_id_record_counts'] = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
					$offset += 2;

for ($i = 0; $i < $thisObject['language_id_record_counts']; $i++) {
						$languageIDrecord = array();

$languageIDrecord['language_id_length']         = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  1));
						$offset += 1;

$languageIDrecord['language_id']                =                              substr($asf_header_extension_object_data, $offset,  $languageIDrecord['language_id_length']);
						$offset += $languageIDrecord['language_id_length'];

$thisObject['language_id_record'][$i] = $languageIDrecord;
					}
					break;

case GETID3_ASF_Metadata_Library_Object:
					$thisObject['description_records_count'] = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
					$offset += 2;

for ($i = 0; $i < $thisObject['description_records_count']; $i++) {
						$descriptionRecord = array();

$descriptionRecord['language_list_index'] = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
						$offset += 2;

$descriptionRecord['stream_number']       = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
						$offset += 2;

$descriptionRecord['name_length']         = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
						$offset += 2;

$descriptionRecord['data_type']           = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  2));
						$offset += 2;
						$descriptionRecord['data_type_text'] = self::metadataLibraryObjectDataTypeLookup($descriptionRecord['data_type']);

$descriptionRecord['data_length']         = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset,  4));
						$offset += 4;

$descriptionRecord['name']                =                              substr($asf_header_extension_object_data, $offset,  $descriptionRecord['name_length']);
						$offset += $descriptionRecord['name_length'];

if (preg_match('#^WM/Picture$#', str_replace("\x00", '', trim($descriptionRecord['name'])))) {
							$WMpicture = $this->ASF_WMpicture($descriptionRecord['data']);
							foreach ($WMpicture as $key => $value) {
								$descriptionRecord['data'] = $WMpicture;
							}
							unset($WMpicture);
						}

$thisObject['description_record'][$i] = $descriptionRecord;
					}
					break;

case GETID3_ASF_Index_Parameters_Object:
					$thisObject['index_entry_time_interval'] = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset, 4));
					$offset += 4;

$thisObject['index_specifiers_count']    = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset, 2));
					$offset += 2;

for ($i = 0; $i < $thisObject['index_specifiers_count']; $i++) {
						$indexSpecifier = array();

$indexSpecifier['stream_number']   = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset, 2));
						$offset += 2;

$indexSpecifier['index_type']      = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset, 2));
						$offset += 2;
						$indexSpecifier['index_type_text'] = isset(static::$ASFIndexParametersObjectIndexSpecifiersIndexTypes[$indexSpecifier['index_type']])
							? static::$ASFIndexParametersObjectIndexSpecifiersIndexTypes[$indexSpecifier['index_type']]
							: 'invalid'
						;

$thisObject['index_specifiers'][$i] = $indexSpecifier;
					}

break;

case GETID3_ASF_Media_Object_Index_Parameters_Object:
					$thisObject['index_entry_count_interval'] = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset, 4));
					$offset += 4;

$thisObject['index_specifiers_count']     = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset, 2));
					$offset += 2;

for ($i = 0; $i < $thisObject['index_specifiers_count']; $i++) {
						$indexSpecifier = array();

$indexSpecifier['stream_number']   = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset, 2));
						$offset += 2;

$indexSpecifier['index_type']      = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset, 2));
						$offset += 2;
						$indexSpecifier['index_type_text'] = isset(static::$ASFMediaObjectIndexParametersObjectIndexSpecifiersIndexTypes[$indexSpecifier['index_type']])
							? static::$ASFMediaObjectIndexParametersObjectIndexSpecifiersIndexTypes[$indexSpecifier['index_type']]
							: 'invalid'
						;

$thisObject['index_specifiers'][$i] = $indexSpecifier;
					}

break;

case GETID3_ASF_Timecode_Index_Parameters_Object:
					// 4.11	Timecode Index Parameters Object (mandatory only if TIMECODE index is present in file, 0 or 1)
					// Field name                     Field type   Size (bits)
					// Object ID                      GUID         128             // GUID for the Timecode Index Parameters Object - ASF_Timecode_Index_Parameters_Object
					// Object Size                    QWORD        64              // Specifies the size, in bytes, of the Timecode Index Parameters Object. Valid values are at least 34 bytes.
					// Index Entry Count Interval     DWORD        32              // This value is ignored for the Timecode Index Parameters Object.
					// Index Specifiers Count         WORD         16              // Specifies the number of entries in the Index Specifiers list. Valid values are 1 and greater.
					// Index Specifiers               array of:    varies          //
					// * Stream Number                WORD         16              // Specifies the stream number that the Index Specifiers refer to. Valid values are between 1 and 127.
					// * Index Type                   WORD         16              // Specifies the type of index. Values are defined as follows (1 is not a valid value):
					                                                               // 2 = Nearest Past Media Object - indexes point to the closest data packet containing an entire video frame or the first fragment of a video frame
					                                                               // 3 = Nearest Past Cleanpoint - indexes point to the closest data packet containing an entire video frame (or first fragment of a video frame) that is a key frame.
					                                                               // Nearest Past Media Object is the most common value

$thisObject['index_entry_count_interval'] = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset, 4));
					$offset += 4;

$thisObject['index_specifiers_count']     = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset, 2));
					$offset += 2;

for ($i = 0; $i < $thisObject['index_specifiers_count']; $i++) {
						$indexSpecifier = array();

$indexSpecifier['stream_number']   = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset, 2));
						$offset += 2;

$indexSpecifier['index_type']      = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset, 2));
						$offset += 2;
						$indexSpecifier['index_type_text'] = isset(static::$ASFTimecodeIndexParametersObjectIndexSpecifiersIndexTypes[$indexSpecifier['index_type']])
							? static::$ASFTimecodeIndexParametersObjectIndexSpecifiersIndexTypes[$indexSpecifier['index_type']]
							: 'invalid'
						;

$thisObject['index_specifiers'][$i] = $indexSpecifier;
					}

break;

case GETID3_ASF_Compatibility_Object:
					$thisObject['profile'] = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset, 1));
					$offset += 1;

$thisObject['mode']    = getid3_lib::LittleEndian2Int(substr($asf_header_extension_object_data, $offset, 1));
					$offset += 1;

break;

default:
					$unhandled_sections++;
					if ($this->GUIDname($thisObject['guid_text'])) {
						$this->warning('unhandled Header Extension Object GUID "'.$this->GUIDname($thisObject['guid_text']).'" {'.$thisObject['guid_text'].'} at offset '.($offset - 16 - 8));
					} else {
						$this->warning('unknown Header Extension Object GUID {'.$thisObject['guid_text'].'} in at offset '.($offset - 16 - 8));
					}
					break;
			}
			$HeaderExtensionObjectParsed[] = $thisObject;

$objectOffset += $thisObject['size'];
		}
		return $HeaderExtensionObjectParsed;
	}

/**
	 * @param int $id
	 *
	 * @return string
	 */
	public static function metadataLibraryObjectDataTypeLookup($id) {
		static $lookup = array(
			0x0000 => 'Unicode string', // The data consists of a sequence of Unicode characters
			0x0001 => 'BYTE array',     // The type of the data is implementation-specific
			0x0002 => 'BOOL',           // The data is 2 bytes long and should be interpreted as a 16-bit unsigned integer. Only 0x0000 or 0x0001 are permitted values
			0x0003 => 'DWORD',          // The data is 4 bytes long and should be interpreted as a 32-bit unsigned integer
			0x0004 => 'QWORD',          // The data is 8 bytes long and should be interpreted as a 64-bit unsigned integer
			0x0005 => 'WORD',           // The data is 2 bytes long and should be interpreted as a 16-bit unsigned integer
			0x0006 => 'GUID',           // The data is 16 bytes long and should be interpreted as a 128-bit GUID
		);
		return (isset($lookup[$id]) ? $lookup[$id] : 'invalid');
	}

/**
	 * @param string $data
	 *
	 * @return array
	 */
	public function ASF_WMpicture(&$data) {
		//typedef struct _WMPicture{
		//  LPWSTR  pwszMIMEType;
		//  BYTE  bPictureType;
		//  LPWSTR  pwszDescription;
		//  DWORD  dwDataLen;
		//  BYTE*  pbData;
		//} WM_PICTURE;

$WMpicture = array();

$offset = 0;
		$WMpicture['image_type_id'] = getid3_lib::LittleEndian2Int(substr($data, $offset, 1));
		$offset += 1;
		$WMpicture['image_type']    = self::WMpictureTypeLookup($WMpicture['image_type_id']);
		$WMpicture['image_size']    = getid3_lib::LittleEndian2Int(substr($data, $offset, 4));
		$offset += 4;

$WMpicture['image_mime'] = '';
		do {
			$next_byte_pair = substr($data, $offset, 2);
			$offset += 2;
			$WMpicture['image_mime'] .= $next_byte_pair;
		} while ($next_byte_pair !== "\x00\x00");

$WMpicture['image_description'] = '';
		do {
			$next_byte_pair = substr($data, $offset, 2);
			$offset += 2;
			$WMpicture['image_description'] .= $next_byte_pair;
		} while ($next_byte_pair !== "\x00\x00");

$WMpicture['dataoffset'] = $offset;
		$WMpicture['data'] = substr($data, $offset);

$imageinfo = array();
		$WMpicture['image_mime'] = '';
		$imagechunkcheck = getid3_lib::GetDataImageSize($WMpicture['data'], $imageinfo);
		unset($imageinfo);
		if (!empty($imagechunkcheck)) {
			$WMpicture['image_mime'] = image_type_to_mime_type($imagechunkcheck[2]);
		}
		if (!isset($this->getid3->info['asf']['comments']['picture'])) {
			$this->getid3->info['asf']['comments']['picture'] = array();
		}
		$this->getid3->info['asf']['comments']['picture'][] = array('data'=>$WMpicture['data'], 'image_mime'=>$WMpicture['image_mime']);

return $WMpicture;
	}

/**
	 * Remove terminator 00 00 and convert UTF-16LE to Latin-1.
	 *
	 * @param string $string
	 *
	 * @return string
	 */
	public static function TrimConvert($string) {
		return trim(getid3_lib::iconv_fallback('UTF-16LE', 'ISO-8859-1', self::TrimTerm($string)), ' ');
	}

/**
	 * Remove terminator 00 00.
	 *
	 * @param string $string
	 *
	 * @return string
	 */
	public static function TrimTerm($string) {
		// remove terminator, only if present (it should be, but...)
		if (substr($string, -2) === "\x00\x00") {
			$string = substr($string, 0, -2);
		}
		return $string;
	}

}
���������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������

Cancel / Back

System Features

Safe Mode: Off

disable_functions: None

allow_url_fopen: Off

allow_url_include: Off

magic_quotes_gpc: Off

register_globals: Off

open_basedir: None

cURL: Enabled

ZipArchive: Disabled

MySQLi: Enabled

PDO: Enabled

wget: Yes

curl (cmd): Yes

perl: Yes

python: Yes (py3)

gcc: Yes

pkexec: Yes

git: Yes

[ MAINHACK SHELL ]

Viewing / Editing File: ID3.tar

Server Info

System Features

User Info