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<?php |
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///////////////////////////////////////////////////////////////// |
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/// getID3() by James Heinrich <info@getid3.org> // |
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// available at http://getid3.sourceforge.net // |
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// or http://www.getid3.org // |
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// also https://github.com/JamesHeinrich/getID3 // |
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///////////////////////////////////////////////////////////////// |
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// See readme.txt for more details // |
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///////////////////////////////////////////////////////////////// |
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// // |
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// module.audio.mp3.php // |
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// module for analyzing MP3 files // |
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// dependencies: NONE // |
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// /// |
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///////////////////////////////////////////////////////////////// |
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// number of frames to scan to determine if MPEG-audio sequence is valid |
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// Lower this number to 5-20 for faster scanning |
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// Increase this number to 50+ for most accurate detection of valid VBR/CBR |
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// mpeg-audio streams |
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define('GETID3_MP3_VALID_CHECK_FRAMES', 35); |
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class getid3_mp3 extends getid3_handler |
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{ |
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public $allow_bruteforce = false; // forces getID3() to scan the file byte-by-byte and log all the valid audio frame headers - extremely slow, unrecommended, but may provide data from otherwise-unusuable files |
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public function Analyze() { |
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$info = &$this->getid3->info; |
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$initialOffset = $info['avdataoffset']; |
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if (!$this->getOnlyMPEGaudioInfo($info['avdataoffset'])) { |
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if ($this->allow_bruteforce) { |
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$info['error'][] = 'Rescanning file in BruteForce mode'; |
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$this->getOnlyMPEGaudioInfoBruteForce($this->getid3->fp, $info); |
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} |
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} |
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if (isset($info['mpeg']['audio']['bitrate_mode'])) { |
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$info['audio']['bitrate_mode'] = strtolower($info['mpeg']['audio']['bitrate_mode']); |
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} |
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if (((isset($info['id3v2']['headerlength']) && ($info['avdataoffset'] > $info['id3v2']['headerlength'])) || (!isset($info['id3v2']) && ($info['avdataoffset'] > 0) && ($info['avdataoffset'] != $initialOffset)))) { |
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$synchoffsetwarning = 'Unknown data before synch '; |
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if (isset($info['id3v2']['headerlength'])) { |
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$synchoffsetwarning .= '(ID3v2 header ends at '.$info['id3v2']['headerlength'].', then '.($info['avdataoffset'] - $info['id3v2']['headerlength']).' bytes garbage, '; |
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} elseif ($initialOffset > 0) { |
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$synchoffsetwarning .= '(should be at '.$initialOffset.', '; |
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} else { |
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$synchoffsetwarning .= '(should be at beginning of file, '; |
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} |
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$synchoffsetwarning .= 'synch detected at '.$info['avdataoffset'].')'; |
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if (isset($info['audio']['bitrate_mode']) && ($info['audio']['bitrate_mode'] == 'cbr')) { |
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if (!empty($info['id3v2']['headerlength']) && (($info['avdataoffset'] - $info['id3v2']['headerlength']) == $info['mpeg']['audio']['framelength'])) { |
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$synchoffsetwarning .= '. This is a known problem with some versions of LAME (3.90-3.92) DLL in CBR mode.'; |
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$info['audio']['codec'] = 'LAME'; |
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$CurrentDataLAMEversionString = 'LAME3.'; |
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} elseif (empty($info['id3v2']['headerlength']) && ($info['avdataoffset'] == $info['mpeg']['audio']['framelength'])) { |
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$synchoffsetwarning .= '. This is a known problem with some versions of LAME (3.90 - 3.92) DLL in CBR mode.'; |
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$info['audio']['codec'] = 'LAME'; |
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$CurrentDataLAMEversionString = 'LAME3.'; |
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} |
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} |
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$info['warning'][] = $synchoffsetwarning; |
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} |
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if (isset($info['mpeg']['audio']['LAME'])) { |
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$info['audio']['codec'] = 'LAME'; |
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if (!empty($info['mpeg']['audio']['LAME']['long_version'])) { |
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$info['audio']['encoder'] = rtrim($info['mpeg']['audio']['LAME']['long_version'], "\x00"); |
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} elseif (!empty($info['mpeg']['audio']['LAME']['short_version'])) { |
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$info['audio']['encoder'] = rtrim($info['mpeg']['audio']['LAME']['short_version'], "\x00"); |
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} |
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} |
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$CurrentDataLAMEversionString = (!empty($CurrentDataLAMEversionString) ? $CurrentDataLAMEversionString : (isset($info['audio']['encoder']) ? $info['audio']['encoder'] : '')); |
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if (!empty($CurrentDataLAMEversionString) && (substr($CurrentDataLAMEversionString, 0, 6) == 'LAME3.') && !preg_match('[0-9\)]', substr($CurrentDataLAMEversionString, -1))) { |
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// a version number of LAME that does not end with a number like "LAME3.92" |
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// or with a closing parenthesis like "LAME3.88 (alpha)" |
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// or a version of LAME with the LAMEtag-not-filled-in-DLL-mode bug (3.90-3.92) |
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// not sure what the actual last frame length will be, but will be less than or equal to 1441 |
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$PossiblyLongerLAMEversion_FrameLength = 1441; |
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// Not sure what version of LAME this is - look in padding of last frame for longer version string |
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$PossibleLAMEversionStringOffset = $info['avdataend'] - $PossiblyLongerLAMEversion_FrameLength; |
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$this->fseek($PossibleLAMEversionStringOffset); |
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$PossiblyLongerLAMEversion_Data = $this->fread($PossiblyLongerLAMEversion_FrameLength); |
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switch (substr($CurrentDataLAMEversionString, -1)) { |
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case 'a': |
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case 'b': |
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// "LAME3.94a" will have a longer version string of "LAME3.94 (alpha)" for example |
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// need to trim off "a" to match longer string |
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$CurrentDataLAMEversionString = substr($CurrentDataLAMEversionString, 0, -1); |
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break; |
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} |
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if (($PossiblyLongerLAMEversion_String = strstr($PossiblyLongerLAMEversion_Data, $CurrentDataLAMEversionString)) !== false) { |
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if (substr($PossiblyLongerLAMEversion_String, 0, strlen($CurrentDataLAMEversionString)) == $CurrentDataLAMEversionString) { |
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$PossiblyLongerLAMEversion_NewString = substr($PossiblyLongerLAMEversion_String, 0, strspn($PossiblyLongerLAMEversion_String, 'LAME0123456789., (abcdefghijklmnopqrstuvwxyzJFSOND)')); //"LAME3.90.3" "LAME3.87 (beta 1, Sep 27 2000)" "LAME3.88 (beta)" |
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if (empty($info['audio']['encoder']) || (strlen($PossiblyLongerLAMEversion_NewString) > strlen($info['audio']['encoder']))) { |
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$info['audio']['encoder'] = $PossiblyLongerLAMEversion_NewString; |
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} |
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} |
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} |
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} |
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if (!empty($info['audio']['encoder'])) { |
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$info['audio']['encoder'] = rtrim($info['audio']['encoder'], "\x00 "); |
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} |
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switch (isset($info['mpeg']['audio']['layer']) ? $info['mpeg']['audio']['layer'] : '') { |
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case 1: |
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case 2: |
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$info['audio']['dataformat'] = 'mp'.$info['mpeg']['audio']['layer']; |
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break; |
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} |
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if (isset($info['fileformat']) && ($info['fileformat'] == 'mp3')) { |
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switch ($info['audio']['dataformat']) { |
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case 'mp1': |
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case 'mp2': |
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case 'mp3': |
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$info['fileformat'] = $info['audio']['dataformat']; |
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break; |
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default: |
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$info['warning'][] = 'Expecting [audio][dataformat] to be mp1/mp2/mp3 when fileformat == mp3, [audio][dataformat] actually "'.$info['audio']['dataformat'].'"'; |
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break; |
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} |
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} |
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if (empty($info['fileformat'])) { |
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unset($info['fileformat']); |
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unset($info['audio']['bitrate_mode']); |
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unset($info['avdataoffset']); |
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unset($info['avdataend']); |
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return false; |
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} |
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$info['mime_type'] = 'audio/mpeg'; |
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$info['audio']['lossless'] = false; |
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// Calculate playtime |
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if (!isset($info['playtime_seconds']) && isset($info['audio']['bitrate']) && ($info['audio']['bitrate'] > 0)) { |
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$info['playtime_seconds'] = ($info['avdataend'] - $info['avdataoffset']) * 8 / $info['audio']['bitrate']; |
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} |
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$info['audio']['encoder_options'] = $this->GuessEncoderOptions(); |
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return true; |
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} |
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public function GuessEncoderOptions() { |
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// shortcuts |
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$info = &$this->getid3->info; |
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if (!empty($info['mpeg']['audio'])) { |
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$thisfile_mpeg_audio = &$info['mpeg']['audio']; |
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if (!empty($thisfile_mpeg_audio['LAME'])) { |
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$thisfile_mpeg_audio_lame = &$thisfile_mpeg_audio['LAME']; |
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} |
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} |
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$encoder_options = ''; |
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static $NamedPresetBitrates = array(16, 24, 40, 56, 112, 128, 160, 192, 256); |
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if (isset($thisfile_mpeg_audio['VBR_method']) && ($thisfile_mpeg_audio['VBR_method'] == 'Fraunhofer') && !empty($thisfile_mpeg_audio['VBR_quality'])) { |
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$encoder_options = 'VBR q'.$thisfile_mpeg_audio['VBR_quality']; |
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} elseif (!empty($thisfile_mpeg_audio_lame['preset_used']) && (!in_array($thisfile_mpeg_audio_lame['preset_used_id'], $NamedPresetBitrates))) { |
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$encoder_options = $thisfile_mpeg_audio_lame['preset_used']; |
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} elseif (!empty($thisfile_mpeg_audio_lame['vbr_quality'])) { |
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static $KnownEncoderValues = array(); |
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if (empty($KnownEncoderValues)) { |
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//$KnownEncoderValues[abrbitrate_minbitrate][vbr_quality][raw_vbr_method][raw_noise_shaping][raw_stereo_mode][ath_type][lowpass_frequency] = 'preset name'; |
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$KnownEncoderValues[0xFF][58][1][1][3][2][20500] = '--alt-preset insane'; // 3.90, 3.90.1, 3.92 |
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$KnownEncoderValues[0xFF][58][1][1][3][2][20600] = '--alt-preset insane'; // 3.90.2, 3.90.3, 3.91 |
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$KnownEncoderValues[0xFF][57][1][1][3][4][20500] = '--alt-preset insane'; // 3.94, 3.95 |
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$KnownEncoderValues['**'][78][3][2][3][2][19500] = '--alt-preset extreme'; // 3.90, 3.90.1, 3.92 |
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$KnownEncoderValues['**'][78][3][2][3][2][19600] = '--alt-preset extreme'; // 3.90.2, 3.91 |
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$KnownEncoderValues['**'][78][3][1][3][2][19600] = '--alt-preset extreme'; // 3.90.3 |
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$KnownEncoderValues['**'][78][4][2][3][2][19500] = '--alt-preset fast extreme'; // 3.90, 3.90.1, 3.92 |
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$KnownEncoderValues['**'][78][4][2][3][2][19600] = '--alt-preset fast extreme'; // 3.90.2, 3.90.3, 3.91 |
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$KnownEncoderValues['**'][78][3][2][3][4][19000] = '--alt-preset standard'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 |
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$KnownEncoderValues['**'][78][3][1][3][4][19000] = '--alt-preset standard'; // 3.90.3 |
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$KnownEncoderValues['**'][78][4][2][3][4][19000] = '--alt-preset fast standard'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 |
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$KnownEncoderValues['**'][78][4][1][3][4][19000] = '--alt-preset fast standard'; // 3.90.3 |
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$KnownEncoderValues['**'][88][4][1][3][3][19500] = '--r3mix'; // 3.90, 3.90.1, 3.92 |
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$KnownEncoderValues['**'][88][4][1][3][3][19600] = '--r3mix'; // 3.90.2, 3.90.3, 3.91 |
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$KnownEncoderValues['**'][67][4][1][3][4][18000] = '--r3mix'; // 3.94, 3.95 |
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$KnownEncoderValues['**'][68][3][2][3][4][18000] = '--alt-preset medium'; // 3.90.3 |
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$KnownEncoderValues['**'][68][4][2][3][4][18000] = '--alt-preset fast medium'; // 3.90.3 |
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$KnownEncoderValues[0xFF][99][1][1][1][2][0] = '--preset studio'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 |
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$KnownEncoderValues[0xFF][58][2][1][3][2][20600] = '--preset studio'; // 3.90.3, 3.93.1 |
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$KnownEncoderValues[0xFF][58][2][1][3][2][20500] = '--preset studio'; // 3.93 |
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$KnownEncoderValues[0xFF][57][2][1][3][4][20500] = '--preset studio'; // 3.94, 3.95 |
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$KnownEncoderValues[0xC0][88][1][1][1][2][0] = '--preset cd'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 |
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$KnownEncoderValues[0xC0][58][2][2][3][2][19600] = '--preset cd'; // 3.90.3, 3.93.1 |
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$KnownEncoderValues[0xC0][58][2][2][3][2][19500] = '--preset cd'; // 3.93 |
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$KnownEncoderValues[0xC0][57][2][1][3][4][19500] = '--preset cd'; // 3.94, 3.95 |
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$KnownEncoderValues[0xA0][78][1][1][3][2][18000] = '--preset hifi'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 |
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$KnownEncoderValues[0xA0][58][2][2][3][2][18000] = '--preset hifi'; // 3.90.3, 3.93, 3.93.1 |
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$KnownEncoderValues[0xA0][57][2][1][3][4][18000] = '--preset hifi'; // 3.94, 3.95 |
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$KnownEncoderValues[0x80][67][1][1][3][2][18000] = '--preset tape'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 |
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$KnownEncoderValues[0x80][67][1][1][3][2][15000] = '--preset radio'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 |
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$KnownEncoderValues[0x70][67][1][1][3][2][15000] = '--preset fm'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 |
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223 |
$KnownEncoderValues[0x70][58][2][2][3][2][16000] = '--preset tape/radio/fm'; // 3.90.3, 3.93, 3.93.1 |
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224 |
$KnownEncoderValues[0x70][57][2][1][3][4][16000] = '--preset tape/radio/fm'; // 3.94, 3.95 |
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$KnownEncoderValues[0x38][58][2][2][0][2][10000] = '--preset voice'; // 3.90.3, 3.93, 3.93.1 |
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226 |
$KnownEncoderValues[0x38][57][2][1][0][4][15000] = '--preset voice'; // 3.94, 3.95 |
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227 |
$KnownEncoderValues[0x38][57][2][1][0][4][16000] = '--preset voice'; // 3.94a14 |
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228 |
$KnownEncoderValues[0x28][65][1][1][0][2][7500] = '--preset mw-us'; // 3.90, 3.90.1, 3.92 |
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$KnownEncoderValues[0x28][65][1][1][0][2][7600] = '--preset mw-us'; // 3.90.2, 3.91 |
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$KnownEncoderValues[0x28][58][2][2][0][2][7000] = '--preset mw-us'; // 3.90.3, 3.93, 3.93.1 |
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$KnownEncoderValues[0x28][57][2][1][0][4][10500] = '--preset mw-us'; // 3.94, 3.95 |
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232 |
$KnownEncoderValues[0x28][57][2][1][0][4][11200] = '--preset mw-us'; // 3.94a14 |
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233 |
$KnownEncoderValues[0x28][57][2][1][0][4][8800] = '--preset mw-us'; // 3.94a15 |
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$KnownEncoderValues[0x18][58][2][2][0][2][4000] = '--preset phon+/lw/mw-eu/sw'; // 3.90.3, 3.93.1 |
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235 |
$KnownEncoderValues[0x18][58][2][2][0][2][3900] = '--preset phon+/lw/mw-eu/sw'; // 3.93 |
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236 |
$KnownEncoderValues[0x18][57][2][1][0][4][5900] = '--preset phon+/lw/mw-eu/sw'; // 3.94, 3.95 |
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237 |
$KnownEncoderValues[0x18][57][2][1][0][4][6200] = '--preset phon+/lw/mw-eu/sw'; // 3.94a14 |
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238 |
$KnownEncoderValues[0x18][57][2][1][0][4][3200] = '--preset phon+/lw/mw-eu/sw'; // 3.94a15 |
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$KnownEncoderValues[0x10][58][2][2][0][2][3800] = '--preset phone'; // 3.90.3, 3.93.1 |
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$KnownEncoderValues[0x10][58][2][2][0][2][3700] = '--preset phone'; // 3.93 |
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$KnownEncoderValues[0x10][57][2][1][0][4][5600] = '--preset phone'; // 3.94, 3.95 |
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242 |
} |
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244 |
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']])) { |
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245 |
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246 |
$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']]; |
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247 |
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248 |
} 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']])) { |
|
|
249 |
|
|
|
250 |
$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']][$thisfile_mpeg_audio_lame['lowpass_frequency']]; |
|
|
251 |
|
|
|
252 |
} elseif ($info['audio']['bitrate_mode'] == 'vbr') { |
|
|
253 |
|
|
|
254 |
// http://gabriel.mp3-tech.org/mp3infotag.html |
|
|
255 |
// int Quality = (100 - 10 * gfp->VBR_q - gfp->quality)h |
|
|
256 |
|
|
|
257 |
|
|
|
258 |
$LAME_V_value = 10 - ceil($thisfile_mpeg_audio_lame['vbr_quality'] / 10); |
|
|
259 |
$LAME_q_value = 100 - $thisfile_mpeg_audio_lame['vbr_quality'] - ($LAME_V_value * 10); |
|
|
260 |
$encoder_options = '-V'.$LAME_V_value.' -q'.$LAME_q_value; |
|
|
261 |
|
|
|
262 |
} elseif ($info['audio']['bitrate_mode'] == 'cbr') { |
|
|
263 |
|
|
|
264 |
$encoder_options = strtoupper($info['audio']['bitrate_mode']).ceil($info['audio']['bitrate'] / 1000); |
|
|
265 |
|
|
|
266 |
} else { |
|
|
267 |
|
|
|
268 |
$encoder_options = strtoupper($info['audio']['bitrate_mode']); |
|
|
269 |
|
|
|
270 |
} |
|
|
271 |
|
|
|
272 |
} elseif (!empty($thisfile_mpeg_audio_lame['bitrate_abr'])) { |
|
|
273 |
|
|
|
274 |
$encoder_options = 'ABR'.$thisfile_mpeg_audio_lame['bitrate_abr']; |
|
|
275 |
|
|
|
276 |
} elseif (!empty($info['audio']['bitrate'])) { |
|
|
277 |
|
|
|
278 |
if ($info['audio']['bitrate_mode'] == 'cbr') { |
|
|
279 |
$encoder_options = strtoupper($info['audio']['bitrate_mode']).ceil($info['audio']['bitrate'] / 1000); |
|
|
280 |
} else { |
|
|
281 |
$encoder_options = strtoupper($info['audio']['bitrate_mode']); |
|
|
282 |
} |
|
|
283 |
|
|
|
284 |
} |
|
|
285 |
if (!empty($thisfile_mpeg_audio_lame['bitrate_min'])) { |
|
|
286 |
$encoder_options .= ' -b'.$thisfile_mpeg_audio_lame['bitrate_min']; |
|
|
287 |
} |
|
|
288 |
|
|
|
289 |
if (!empty($thisfile_mpeg_audio_lame['encoding_flags']['nogap_prev']) || !empty($thisfile_mpeg_audio_lame['encoding_flags']['nogap_next'])) { |
|
|
290 |
$encoder_options .= ' --nogap'; |
|
|
291 |
} |
|
|
292 |
|
|
|
293 |
if (!empty($thisfile_mpeg_audio_lame['lowpass_frequency'])) { |
|
|
294 |
$ExplodedOptions = explode(' ', $encoder_options, 4); |
|
|
295 |
if ($ExplodedOptions[0] == '--r3mix') { |
|
|
296 |
$ExplodedOptions[1] = 'r3mix'; |
|
|
297 |
} |
|
|
298 |
switch ($ExplodedOptions[0]) { |
|
|
299 |
case '--preset': |
|
|
300 |
case '--alt-preset': |
|
|
301 |
case '--r3mix': |
|
|
302 |
if ($ExplodedOptions[1] == 'fast') { |
|
|
303 |
$ExplodedOptions[1] .= ' '.$ExplodedOptions[2]; |
|
|
304 |
} |
|
|
305 |
switch ($ExplodedOptions[1]) { |
|
|
306 |
case 'portable': |
|
|
307 |
case 'medium': |
|
|
308 |
case 'standard': |
|
|
309 |
case 'extreme': |
|
|
310 |
case 'insane': |
|
|
311 |
case 'fast portable': |
|
|
312 |
case 'fast medium': |
|
|
313 |
case 'fast standard': |
|
|
314 |
case 'fast extreme': |
|
|
315 |
case 'fast insane': |
|
|
316 |
case 'r3mix': |
|
|
317 |
static $ExpectedLowpass = array( |
|
|
318 |
'insane|20500' => 20500, |
|
|
319 |
'insane|20600' => 20600, // 3.90.2, 3.90.3, 3.91 |
|
|
320 |
'medium|18000' => 18000, |
|
|
321 |
'fast medium|18000' => 18000, |
|
|
322 |
'extreme|19500' => 19500, // 3.90, 3.90.1, 3.92, 3.95 |
|
|
323 |
'extreme|19600' => 19600, // 3.90.2, 3.90.3, 3.91, 3.93.1 |
|
|
324 |
'fast extreme|19500' => 19500, // 3.90, 3.90.1, 3.92, 3.95 |
|
|
325 |
'fast extreme|19600' => 19600, // 3.90.2, 3.90.3, 3.91, 3.93.1 |
|
|
326 |
'standard|19000' => 19000, |
|
|
327 |
'fast standard|19000' => 19000, |
|
|
328 |
'r3mix|19500' => 19500, // 3.90, 3.90.1, 3.92 |
|
|
329 |
'r3mix|19600' => 19600, // 3.90.2, 3.90.3, 3.91 |
|
|
330 |
'r3mix|18000' => 18000, // 3.94, 3.95 |
|
|
331 |
); |
|
|
332 |
if (!isset($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))) { |
|
|
333 |
$encoder_options .= ' --lowpass '.$thisfile_mpeg_audio_lame['lowpass_frequency']; |
|
|
334 |
} |
|
|
335 |
break; |
|
|
336 |
|
|
|
337 |
default: |
|
|
338 |
break; |
|
|
339 |
} |
|
|
340 |
break; |
|
|
341 |
} |
|
|
342 |
} |
|
|
343 |
|
|
|
344 |
if (isset($thisfile_mpeg_audio_lame['raw']['source_sample_freq'])) { |
|
|
345 |
if (($thisfile_mpeg_audio['sample_rate'] == 44100) && ($thisfile_mpeg_audio_lame['raw']['source_sample_freq'] != 1)) { |
|
|
346 |
$encoder_options .= ' --resample 44100'; |
|
|
347 |
} elseif (($thisfile_mpeg_audio['sample_rate'] == 48000) && ($thisfile_mpeg_audio_lame['raw']['source_sample_freq'] != 2)) { |
|
|
348 |
$encoder_options .= ' --resample 48000'; |
|
|
349 |
} elseif ($thisfile_mpeg_audio['sample_rate'] < 44100) { |
|
|
350 |
switch ($thisfile_mpeg_audio_lame['raw']['source_sample_freq']) { |
|
|
351 |
case 0: // <= 32000 |
|
|
352 |
// may or may not be same as source frequency - ignore |
|
|
353 |
break; |
|
|
354 |
case 1: // 44100 |
|
|
355 |
case 2: // 48000 |
|
|
356 |
case 3: // 48000+ |
|
|
357 |
$ExplodedOptions = explode(' ', $encoder_options, 4); |
|
|
358 |
switch ($ExplodedOptions[0]) { |
|
|
359 |
case '--preset': |
|
|
360 |
case '--alt-preset': |
|
|
361 |
switch ($ExplodedOptions[1]) { |
|
|
362 |
case 'fast': |
|
|
363 |
case 'portable': |
|
|
364 |
case 'medium': |
|
|
365 |
case 'standard': |
|
|
366 |
case 'extreme': |
|
|
367 |
case 'insane': |
|
|
368 |
$encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate']; |
|
|
369 |
break; |
|
|
370 |
|
|
|
371 |
default: |
|
|
372 |
static $ExpectedResampledRate = array( |
|
|
373 |
'phon+/lw/mw-eu/sw|16000' => 16000, |
|
|
374 |
'mw-us|24000' => 24000, // 3.95 |
|
|
375 |
'mw-us|32000' => 32000, // 3.93 |
|
|
376 |
'mw-us|16000' => 16000, // 3.92 |
|
|
377 |
'phone|16000' => 16000, |
|
|
378 |
'phone|11025' => 11025, // 3.94a15 |
|
|
379 |
'radio|32000' => 32000, // 3.94a15 |
|
|
380 |
'fm/radio|32000' => 32000, // 3.92 |
|
|
381 |
'fm|32000' => 32000, // 3.90 |
|
|
382 |
'voice|32000' => 32000); |
|
|
383 |
if (!isset($ExpectedResampledRate[$ExplodedOptions[1].'|'.$thisfile_mpeg_audio['sample_rate']])) { |
|
|
384 |
$encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate']; |
|
|
385 |
} |
|
|
386 |
break; |
|
|
387 |
} |
|
|
388 |
break; |
|
|
389 |
|
|
|
390 |
case '--r3mix': |
|
|
391 |
default: |
|
|
392 |
$encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate']; |
|
|
393 |
break; |
|
|
394 |
} |
|
|
395 |
break; |
|
|
396 |
} |
|
|
397 |
} |
|
|
398 |
} |
|
|
399 |
if (empty($encoder_options) && !empty($info['audio']['bitrate']) && !empty($info['audio']['bitrate_mode'])) { |
|
|
400 |
//$encoder_options = strtoupper($info['audio']['bitrate_mode']).ceil($info['audio']['bitrate'] / 1000); |
|
|
401 |
$encoder_options = strtoupper($info['audio']['bitrate_mode']); |
|
|
402 |
} |
|
|
403 |
|
|
|
404 |
return $encoder_options; |
|
|
405 |
} |
|
|
406 |
|
|
|
407 |
|
|
|
408 |
public function decodeMPEGaudioHeader($offset, &$info, $recursivesearch=true, $ScanAsCBR=false, $FastMPEGheaderScan=false) { |
|
|
409 |
static $MPEGaudioVersionLookup; |
|
|
410 |
static $MPEGaudioLayerLookup; |
|
|
411 |
static $MPEGaudioBitrateLookup; |
|
|
412 |
static $MPEGaudioFrequencyLookup; |
|
|
413 |
static $MPEGaudioChannelModeLookup; |
|
|
414 |
static $MPEGaudioModeExtensionLookup; |
|
|
415 |
static $MPEGaudioEmphasisLookup; |
|
|
416 |
if (empty($MPEGaudioVersionLookup)) { |
|
|
417 |
$MPEGaudioVersionLookup = self::MPEGaudioVersionArray(); |
|
|
418 |
$MPEGaudioLayerLookup = self::MPEGaudioLayerArray(); |
|
|
419 |
$MPEGaudioBitrateLookup = self::MPEGaudioBitrateArray(); |
|
|
420 |
$MPEGaudioFrequencyLookup = self::MPEGaudioFrequencyArray(); |
|
|
421 |
$MPEGaudioChannelModeLookup = self::MPEGaudioChannelModeArray(); |
|
|
422 |
$MPEGaudioModeExtensionLookup = self::MPEGaudioModeExtensionArray(); |
|
|
423 |
$MPEGaudioEmphasisLookup = self::MPEGaudioEmphasisArray(); |
|
|
424 |
} |
|
|
425 |
|
|
5
|
426 |
if ($this->fseek($offset) != 0) { |
|
0
|
427 |
$info['error'][] = 'decodeMPEGaudioHeader() failed to seek to next offset at '.$offset; |
|
|
428 |
return false; |
|
|
429 |
} |
|
5
|
430 |
//$headerstring = $this->fread(1441); // worst-case max length = 32kHz @ 320kbps layer 3 = 1441 bytes/frame |
|
|
431 |
$headerstring = $this->fread(226); // LAME header at offset 36 + 190 bytes of Xing/LAME data |
|
0
|
432 |
|
|
|
433 |
// MP3 audio frame structure: |
|
|
434 |
// $aa $aa $aa $aa [$bb $bb] $cc... |
|
|
435 |
// where $aa..$aa is the four-byte mpeg-audio header (below) |
|
|
436 |
// $bb $bb is the optional 2-byte CRC |
|
|
437 |
// and $cc... is the audio data |
|
|
438 |
|
|
|
439 |
$head4 = substr($headerstring, 0, 4); |
|
|
440 |
|
|
|
441 |
static $MPEGaudioHeaderDecodeCache = array(); |
|
|
442 |
if (isset($MPEGaudioHeaderDecodeCache[$head4])) { |
|
|
443 |
$MPEGheaderRawArray = $MPEGaudioHeaderDecodeCache[$head4]; |
|
|
444 |
} else { |
|
|
445 |
$MPEGheaderRawArray = self::MPEGaudioHeaderDecode($head4); |
|
|
446 |
$MPEGaudioHeaderDecodeCache[$head4] = $MPEGheaderRawArray; |
|
|
447 |
} |
|
|
448 |
|
|
|
449 |
static $MPEGaudioHeaderValidCache = array(); |
|
|
450 |
if (!isset($MPEGaudioHeaderValidCache[$head4])) { // Not in cache |
|
|
451 |
//$MPEGaudioHeaderValidCache[$head4] = self::MPEGaudioHeaderValid($MPEGheaderRawArray, false, true); // allow badly-formatted freeformat (from LAME 3.90 - 3.93.1) |
|
|
452 |
$MPEGaudioHeaderValidCache[$head4] = self::MPEGaudioHeaderValid($MPEGheaderRawArray, false, false); |
|
|
453 |
} |
|
|
454 |
|
|
|
455 |
// shortcut |
|
|
456 |
if (!isset($info['mpeg']['audio'])) { |
|
|
457 |
$info['mpeg']['audio'] = array(); |
|
|
458 |
} |
|
|
459 |
$thisfile_mpeg_audio = &$info['mpeg']['audio']; |
|
|
460 |
|
|
|
461 |
|
|
|
462 |
if ($MPEGaudioHeaderValidCache[$head4]) { |
|
|
463 |
$thisfile_mpeg_audio['raw'] = $MPEGheaderRawArray; |
|
|
464 |
} else { |
|
|
465 |
$info['error'][] = 'Invalid MPEG audio header ('.getid3_lib::PrintHexBytes($head4).') at offset '.$offset; |
|
|
466 |
return false; |
|
|
467 |
} |
|
|
468 |
|
|
|
469 |
if (!$FastMPEGheaderScan) { |
|
|
470 |
$thisfile_mpeg_audio['version'] = $MPEGaudioVersionLookup[$thisfile_mpeg_audio['raw']['version']]; |
|
|
471 |
$thisfile_mpeg_audio['layer'] = $MPEGaudioLayerLookup[$thisfile_mpeg_audio['raw']['layer']]; |
|
|
472 |
|
|
|
473 |
$thisfile_mpeg_audio['channelmode'] = $MPEGaudioChannelModeLookup[$thisfile_mpeg_audio['raw']['channelmode']]; |
|
|
474 |
$thisfile_mpeg_audio['channels'] = (($thisfile_mpeg_audio['channelmode'] == 'mono') ? 1 : 2); |
|
|
475 |
$thisfile_mpeg_audio['sample_rate'] = $MPEGaudioFrequencyLookup[$thisfile_mpeg_audio['version']][$thisfile_mpeg_audio['raw']['sample_rate']]; |
|
|
476 |
$thisfile_mpeg_audio['protection'] = !$thisfile_mpeg_audio['raw']['protection']; |
|
|
477 |
$thisfile_mpeg_audio['private'] = (bool) $thisfile_mpeg_audio['raw']['private']; |
|
|
478 |
$thisfile_mpeg_audio['modeextension'] = $MPEGaudioModeExtensionLookup[$thisfile_mpeg_audio['layer']][$thisfile_mpeg_audio['raw']['modeextension']]; |
|
|
479 |
$thisfile_mpeg_audio['copyright'] = (bool) $thisfile_mpeg_audio['raw']['copyright']; |
|
|
480 |
$thisfile_mpeg_audio['original'] = (bool) $thisfile_mpeg_audio['raw']['original']; |
|
|
481 |
$thisfile_mpeg_audio['emphasis'] = $MPEGaudioEmphasisLookup[$thisfile_mpeg_audio['raw']['emphasis']]; |
|
|
482 |
|
|
|
483 |
$info['audio']['channels'] = $thisfile_mpeg_audio['channels']; |
|
|
484 |
$info['audio']['sample_rate'] = $thisfile_mpeg_audio['sample_rate']; |
|
|
485 |
|
|
|
486 |
if ($thisfile_mpeg_audio['protection']) { |
|
|
487 |
$thisfile_mpeg_audio['crc'] = getid3_lib::BigEndian2Int(substr($headerstring, 4, 2)); |
|
|
488 |
} |
|
|
489 |
} |
|
|
490 |
|
|
|
491 |
if ($thisfile_mpeg_audio['raw']['bitrate'] == 15) { |
|
|
492 |
// http://www.hydrogenaudio.org/?act=ST&f=16&t=9682&st=0 |
|
|
493 |
$info['warning'][] = 'Invalid bitrate index (15), this is a known bug in free-format MP3s encoded by LAME v3.90 - 3.93.1'; |
|
|
494 |
$thisfile_mpeg_audio['raw']['bitrate'] = 0; |
|
|
495 |
} |
|
|
496 |
$thisfile_mpeg_audio['padding'] = (bool) $thisfile_mpeg_audio['raw']['padding']; |
|
|
497 |
$thisfile_mpeg_audio['bitrate'] = $MPEGaudioBitrateLookup[$thisfile_mpeg_audio['version']][$thisfile_mpeg_audio['layer']][$thisfile_mpeg_audio['raw']['bitrate']]; |
|
|
498 |
|
|
|
499 |
if (($thisfile_mpeg_audio['bitrate'] == 'free') && ($offset == $info['avdataoffset'])) { |
|
|
500 |
// only skip multiple frame check if free-format bitstream found at beginning of file |
|
|
501 |
// otherwise is quite possibly simply corrupted data |
|
|
502 |
$recursivesearch = false; |
|
|
503 |
} |
|
|
504 |
|
|
|
505 |
// For Layer 2 there are some combinations of bitrate and mode which are not allowed. |
|
|
506 |
if (!$FastMPEGheaderScan && ($thisfile_mpeg_audio['layer'] == '2')) { |
|
|
507 |
|
|
|
508 |
$info['audio']['dataformat'] = 'mp2'; |
|
|
509 |
switch ($thisfile_mpeg_audio['channelmode']) { |
|
|
510 |
|
|
|
511 |
case 'mono': |
|
|
512 |
if (($thisfile_mpeg_audio['bitrate'] == 'free') || ($thisfile_mpeg_audio['bitrate'] <= 192000)) { |
|
|
513 |
// these are ok |
|
|
514 |
} else { |
|
|
515 |
$info['error'][] = $thisfile_mpeg_audio['bitrate'].'kbps not allowed in Layer 2, '.$thisfile_mpeg_audio['channelmode'].'.'; |
|
|
516 |
return false; |
|
|
517 |
} |
|
|
518 |
break; |
|
|
519 |
|
|
|
520 |
case 'stereo': |
|
|
521 |
case 'joint stereo': |
|
|
522 |
case 'dual channel': |
|
|
523 |
if (($thisfile_mpeg_audio['bitrate'] == 'free') || ($thisfile_mpeg_audio['bitrate'] == 64000) || ($thisfile_mpeg_audio['bitrate'] >= 96000)) { |
|
|
524 |
// these are ok |
|
|
525 |
} else { |
|
|
526 |
$info['error'][] = intval(round($thisfile_mpeg_audio['bitrate'] / 1000)).'kbps not allowed in Layer 2, '.$thisfile_mpeg_audio['channelmode'].'.'; |
|
|
527 |
return false; |
|
|
528 |
} |
|
|
529 |
break; |
|
|
530 |
|
|
|
531 |
} |
|
|
532 |
|
|
|
533 |
} |
|
|
534 |
|
|
|
535 |
|
|
|
536 |
if ($info['audio']['sample_rate'] > 0) { |
|
|
537 |
$thisfile_mpeg_audio['framelength'] = self::MPEGaudioFrameLength($thisfile_mpeg_audio['bitrate'], $thisfile_mpeg_audio['version'], $thisfile_mpeg_audio['layer'], (int) $thisfile_mpeg_audio['padding'], $info['audio']['sample_rate']); |
|
|
538 |
} |
|
|
539 |
|
|
|
540 |
$nextframetestoffset = $offset + 1; |
|
|
541 |
if ($thisfile_mpeg_audio['bitrate'] != 'free') { |
|
|
542 |
|
|
|
543 |
$info['audio']['bitrate'] = $thisfile_mpeg_audio['bitrate']; |
|
|
544 |
|
|
|
545 |
if (isset($thisfile_mpeg_audio['framelength'])) { |
|
|
546 |
$nextframetestoffset = $offset + $thisfile_mpeg_audio['framelength']; |
|
|
547 |
} else { |
|
|
548 |
$info['error'][] = 'Frame at offset('.$offset.') is has an invalid frame length.'; |
|
|
549 |
return false; |
|
|
550 |
} |
|
|
551 |
|
|
|
552 |
} |
|
|
553 |
|
|
|
554 |
$ExpectedNumberOfAudioBytes = 0; |
|
|
555 |
|
|
|
556 |
//////////////////////////////////////////////////////////////////////////////////// |
|
|
557 |
// Variable-bitrate headers |
|
|
558 |
|
|
|
559 |
if (substr($headerstring, 4 + 32, 4) == 'VBRI') { |
|
|
560 |
// Fraunhofer VBR header is hardcoded 'VBRI' at offset 0x24 (36) |
|
|
561 |
// specs taken from http://minnie.tuhs.org/pipermail/mp3encoder/2001-January/001800.html |
|
|
562 |
|
|
|
563 |
$thisfile_mpeg_audio['bitrate_mode'] = 'vbr'; |
|
|
564 |
$thisfile_mpeg_audio['VBR_method'] = 'Fraunhofer'; |
|
|
565 |
$info['audio']['codec'] = 'Fraunhofer'; |
|
|
566 |
|
|
|
567 |
$SideInfoData = substr($headerstring, 4 + 2, 32); |
|
|
568 |
|
|
|
569 |
$FraunhoferVBROffset = 36; |
|
|
570 |
|
|
|
571 |
$thisfile_mpeg_audio['VBR_encoder_version'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 4, 2)); // VbriVersion |
|
|
572 |
$thisfile_mpeg_audio['VBR_encoder_delay'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 6, 2)); // VbriDelay |
|
|
573 |
$thisfile_mpeg_audio['VBR_quality'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 8, 2)); // VbriQuality |
|
|
574 |
$thisfile_mpeg_audio['VBR_bytes'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 10, 4)); // VbriStreamBytes |
|
|
575 |
$thisfile_mpeg_audio['VBR_frames'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 14, 4)); // VbriStreamFrames |
|
|
576 |
$thisfile_mpeg_audio['VBR_seek_offsets'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 18, 2)); // VbriTableSize |
|
|
577 |
$thisfile_mpeg_audio['VBR_seek_scale'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 20, 2)); // VbriTableScale |
|
|
578 |
$thisfile_mpeg_audio['VBR_entry_bytes'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 22, 2)); // VbriEntryBytes |
|
|
579 |
$thisfile_mpeg_audio['VBR_entry_frames'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 24, 2)); // VbriEntryFrames |
|
|
580 |
|
|
|
581 |
$ExpectedNumberOfAudioBytes = $thisfile_mpeg_audio['VBR_bytes']; |
|
|
582 |
|
|
|
583 |
$previousbyteoffset = $offset; |
|
|
584 |
for ($i = 0; $i < $thisfile_mpeg_audio['VBR_seek_offsets']; $i++) { |
|
|
585 |
$Fraunhofer_OffsetN = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset, $thisfile_mpeg_audio['VBR_entry_bytes'])); |
|
|
586 |
$FraunhoferVBROffset += $thisfile_mpeg_audio['VBR_entry_bytes']; |
|
|
587 |
$thisfile_mpeg_audio['VBR_offsets_relative'][$i] = ($Fraunhofer_OffsetN * $thisfile_mpeg_audio['VBR_seek_scale']); |
|
|
588 |
$thisfile_mpeg_audio['VBR_offsets_absolute'][$i] = ($Fraunhofer_OffsetN * $thisfile_mpeg_audio['VBR_seek_scale']) + $previousbyteoffset; |
|
|
589 |
$previousbyteoffset += $Fraunhofer_OffsetN; |
|
|
590 |
} |
|
|
591 |
|
|
|
592 |
|
|
|
593 |
} else { |
|
|
594 |
|
|
|
595 |
// Xing VBR header is hardcoded 'Xing' at a offset 0x0D (13), 0x15 (21) or 0x24 (36) |
|
|
596 |
// depending on MPEG layer and number of channels |
|
|
597 |
|
|
|
598 |
$VBRidOffset = self::XingVBRidOffset($thisfile_mpeg_audio['version'], $thisfile_mpeg_audio['channelmode']); |
|
|
599 |
$SideInfoData = substr($headerstring, 4 + 2, $VBRidOffset - 4); |
|
|
600 |
|
|
|
601 |
if ((substr($headerstring, $VBRidOffset, strlen('Xing')) == 'Xing') || (substr($headerstring, $VBRidOffset, strlen('Info')) == 'Info')) { |
|
|
602 |
// 'Xing' is traditional Xing VBR frame |
|
|
603 |
// 'Info' is LAME-encoded CBR (This was done to avoid CBR files to be recognized as traditional Xing VBR files by some decoders.) |
|
|
604 |
// 'Info' *can* legally be used to specify a VBR file as well, however. |
|
|
605 |
|
|
|
606 |
// http://www.multiweb.cz/twoinches/MP3inside.htm |
|
|
607 |
//00..03 = "Xing" or "Info" |
|
|
608 |
//04..07 = Flags: |
|
|
609 |
// 0x01 Frames Flag set if value for number of frames in file is stored |
|
|
610 |
// 0x02 Bytes Flag set if value for filesize in bytes is stored |
|
|
611 |
// 0x04 TOC Flag set if values for TOC are stored |
|
|
612 |
// 0x08 VBR Scale Flag set if values for VBR scale is stored |
|
|
613 |
//08..11 Frames: Number of frames in file (including the first Xing/Info one) |
|
|
614 |
//12..15 Bytes: File length in Bytes |
|
|
615 |
//16..115 TOC (Table of Contents): |
|
|
616 |
// Contains of 100 indexes (one Byte length) for easier lookup in file. Approximately solves problem with moving inside file. |
|
|
617 |
// Each Byte has a value according this formula: |
|
|
618 |
// (TOC[i] / 256) * fileLenInBytes |
|
|
619 |
// So if song lasts eg. 240 sec. and you want to jump to 60. sec. (and file is 5 000 000 Bytes length) you can use: |
|
|
620 |
// TOC[(60/240)*100] = TOC[25] |
|
|
621 |
// and corresponding Byte in file is then approximately at: |
|
|
622 |
// (TOC[25]/256) * 5000000 |
|
|
623 |
//116..119 VBR Scale |
|
|
624 |
|
|
|
625 |
|
|
|
626 |
// should be safe to leave this at 'vbr' and let it be overriden to 'cbr' if a CBR preset/mode is used by LAME |
|
|
627 |
// if (substr($headerstring, $VBRidOffset, strlen('Info')) == 'Xing') { |
|
|
628 |
$thisfile_mpeg_audio['bitrate_mode'] = 'vbr'; |
|
|
629 |
$thisfile_mpeg_audio['VBR_method'] = 'Xing'; |
|
|
630 |
// } else { |
|
|
631 |
// $ScanAsCBR = true; |
|
|
632 |
// $thisfile_mpeg_audio['bitrate_mode'] = 'cbr'; |
|
|
633 |
// } |
|
|
634 |
|
|
|
635 |
$thisfile_mpeg_audio['xing_flags_raw'] = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset + 4, 4)); |
|
|
636 |
|
|
|
637 |
$thisfile_mpeg_audio['xing_flags']['frames'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000001); |
|
|
638 |
$thisfile_mpeg_audio['xing_flags']['bytes'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000002); |
|
|
639 |
$thisfile_mpeg_audio['xing_flags']['toc'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000004); |
|
|
640 |
$thisfile_mpeg_audio['xing_flags']['vbr_scale'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000008); |
|
|
641 |
|
|
|
642 |
if ($thisfile_mpeg_audio['xing_flags']['frames']) { |
|
|
643 |
$thisfile_mpeg_audio['VBR_frames'] = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset + 8, 4)); |
|
|
644 |
//$thisfile_mpeg_audio['VBR_frames']--; // don't count header Xing/Info frame |
|
|
645 |
} |
|
|
646 |
if ($thisfile_mpeg_audio['xing_flags']['bytes']) { |
|
|
647 |
$thisfile_mpeg_audio['VBR_bytes'] = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset + 12, 4)); |
|
|
648 |
} |
|
|
649 |
|
|
|
650 |
//if (($thisfile_mpeg_audio['bitrate'] == 'free') && !empty($thisfile_mpeg_audio['VBR_frames']) && !empty($thisfile_mpeg_audio['VBR_bytes'])) { |
|
|
651 |
if (!empty($thisfile_mpeg_audio['VBR_frames']) && !empty($thisfile_mpeg_audio['VBR_bytes'])) { |
|
|
652 |
|
|
|
653 |
$framelengthfloat = $thisfile_mpeg_audio['VBR_bytes'] / $thisfile_mpeg_audio['VBR_frames']; |
|
|
654 |
|
|
|
655 |
if ($thisfile_mpeg_audio['layer'] == '1') { |
|
|
656 |
// BitRate = (((FrameLengthInBytes / 4) - Padding) * SampleRate) / 12 |
|
|
657 |
//$info['audio']['bitrate'] = ((($framelengthfloat / 4) - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 12; |
|
|
658 |
$info['audio']['bitrate'] = ($framelengthfloat / 4) * $thisfile_mpeg_audio['sample_rate'] * (2 / $info['audio']['channels']) / 12; |
|
|
659 |
} else { |
|
|
660 |
// Bitrate = ((FrameLengthInBytes - Padding) * SampleRate) / 144 |
|
|
661 |
//$info['audio']['bitrate'] = (($framelengthfloat - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 144; |
|
|
662 |
$info['audio']['bitrate'] = $framelengthfloat * $thisfile_mpeg_audio['sample_rate'] * (2 / $info['audio']['channels']) / 144; |
|
|
663 |
} |
|
|
664 |
$thisfile_mpeg_audio['framelength'] = floor($framelengthfloat); |
|
|
665 |
} |
|
|
666 |
|
|
|
667 |
if ($thisfile_mpeg_audio['xing_flags']['toc']) { |
|
|
668 |
$LAMEtocData = substr($headerstring, $VBRidOffset + 16, 100); |
|
|
669 |
for ($i = 0; $i < 100; $i++) { |
|
|
670 |
$thisfile_mpeg_audio['toc'][$i] = ord($LAMEtocData{$i}); |
|
|
671 |
} |
|
|
672 |
} |
|
|
673 |
if ($thisfile_mpeg_audio['xing_flags']['vbr_scale']) { |
|
|
674 |
$thisfile_mpeg_audio['VBR_scale'] = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset + 116, 4)); |
|
|
675 |
} |
|
|
676 |
|
|
|
677 |
|
|
|
678 |
// http://gabriel.mp3-tech.org/mp3infotag.html |
|
|
679 |
if (substr($headerstring, $VBRidOffset + 120, 4) == 'LAME') { |
|
|
680 |
|
|
|
681 |
// shortcut |
|
|
682 |
$thisfile_mpeg_audio['LAME'] = array(); |
|
|
683 |
$thisfile_mpeg_audio_lame = &$thisfile_mpeg_audio['LAME']; |
|
|
684 |
|
|
|
685 |
|
|
|
686 |
$thisfile_mpeg_audio_lame['long_version'] = substr($headerstring, $VBRidOffset + 120, 20); |
|
|
687 |
$thisfile_mpeg_audio_lame['short_version'] = substr($thisfile_mpeg_audio_lame['long_version'], 0, 9); |
|
|
688 |
|
|
|
689 |
if ($thisfile_mpeg_audio_lame['short_version'] >= 'LAME3.90') { |
|
|
690 |
|
|
|
691 |
// extra 11 chars are not part of version string when LAMEtag present |
|
|
692 |
unset($thisfile_mpeg_audio_lame['long_version']); |
|
|
693 |
|
|
|
694 |
// It the LAME tag was only introduced in LAME v3.90 |
|
|
695 |
// http://www.hydrogenaudio.org/?act=ST&f=15&t=9933 |
|
|
696 |
|
|
|
697 |
// Offsets of various bytes in http://gabriel.mp3-tech.org/mp3infotag.html |
|
|
698 |
// are assuming a 'Xing' identifier offset of 0x24, which is the case for |
|
|
699 |
// MPEG-1 non-mono, but not for other combinations |
|
|
700 |
$LAMEtagOffsetContant = $VBRidOffset - 0x24; |
|
|
701 |
|
|
|
702 |
// shortcuts |
|
|
703 |
$thisfile_mpeg_audio_lame['RGAD'] = array('track'=>array(), 'album'=>array()); |
|
|
704 |
$thisfile_mpeg_audio_lame_RGAD = &$thisfile_mpeg_audio_lame['RGAD']; |
|
|
705 |
$thisfile_mpeg_audio_lame_RGAD_track = &$thisfile_mpeg_audio_lame_RGAD['track']; |
|
|
706 |
$thisfile_mpeg_audio_lame_RGAD_album = &$thisfile_mpeg_audio_lame_RGAD['album']; |
|
|
707 |
$thisfile_mpeg_audio_lame['raw'] = array(); |
|
|
708 |
$thisfile_mpeg_audio_lame_raw = &$thisfile_mpeg_audio_lame['raw']; |
|
|
709 |
|
|
|
710 |
// byte $9B VBR Quality |
|
|
711 |
// This field is there to indicate a quality level, although the scale was not precised in the original Xing specifications. |
|
|
712 |
// Actually overwrites original Xing bytes |
|
|
713 |
unset($thisfile_mpeg_audio['VBR_scale']); |
|
|
714 |
$thisfile_mpeg_audio_lame['vbr_quality'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0x9B, 1)); |
|
|
715 |
|
|
|
716 |
// bytes $9C-$A4 Encoder short VersionString |
|
|
717 |
$thisfile_mpeg_audio_lame['short_version'] = substr($headerstring, $LAMEtagOffsetContant + 0x9C, 9); |
|
|
718 |
|
|
|
719 |
// byte $A5 Info Tag revision + VBR method |
|
|
720 |
$LAMEtagRevisionVBRmethod = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xA5, 1)); |
|
|
721 |
|
|
|
722 |
$thisfile_mpeg_audio_lame['tag_revision'] = ($LAMEtagRevisionVBRmethod & 0xF0) >> 4; |
|
|
723 |
$thisfile_mpeg_audio_lame_raw['vbr_method'] = $LAMEtagRevisionVBRmethod & 0x0F; |
|
|
724 |
$thisfile_mpeg_audio_lame['vbr_method'] = self::LAMEvbrMethodLookup($thisfile_mpeg_audio_lame_raw['vbr_method']); |
|
|
725 |
$thisfile_mpeg_audio['bitrate_mode'] = substr($thisfile_mpeg_audio_lame['vbr_method'], 0, 3); // usually either 'cbr' or 'vbr', but truncates 'vbr-old / vbr-rh' to 'vbr' |
|
|
726 |
|
|
|
727 |
// byte $A6 Lowpass filter value |
|
|
728 |
$thisfile_mpeg_audio_lame['lowpass_frequency'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xA6, 1)) * 100; |
|
|
729 |
|
|
|
730 |
// bytes $A7-$AE Replay Gain |
|
|
731 |
// http://privatewww.essex.ac.uk/~djmrob/replaygain/rg_data_format.html |
|
|
732 |
// bytes $A7-$AA : 32 bit floating point "Peak signal amplitude" |
|
|
733 |
if ($thisfile_mpeg_audio_lame['short_version'] >= 'LAME3.94b') { |
|
|
734 |
// LAME 3.94a16 and later - 9.23 fixed point |
|
|
735 |
// ie 0x0059E2EE / (2^23) = 5890798 / 8388608 = 0.7022378444671630859375 |
|
|
736 |
$thisfile_mpeg_audio_lame_RGAD['peak_amplitude'] = (float) ((getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xA7, 4))) / 8388608); |
|
|
737 |
} else { |
|
|
738 |
// LAME 3.94a15 and earlier - 32-bit floating point |
|
|
739 |
// Actually 3.94a16 will fall in here too and be WRONG, but is hard to detect 3.94a16 vs 3.94a15 |
|
|
740 |
$thisfile_mpeg_audio_lame_RGAD['peak_amplitude'] = getid3_lib::LittleEndian2Float(substr($headerstring, $LAMEtagOffsetContant + 0xA7, 4)); |
|
|
741 |
} |
|
|
742 |
if ($thisfile_mpeg_audio_lame_RGAD['peak_amplitude'] == 0) { |
|
|
743 |
unset($thisfile_mpeg_audio_lame_RGAD['peak_amplitude']); |
|
|
744 |
} else { |
|
|
745 |
$thisfile_mpeg_audio_lame_RGAD['peak_db'] = getid3_lib::RGADamplitude2dB($thisfile_mpeg_audio_lame_RGAD['peak_amplitude']); |
|
|
746 |
} |
|
|
747 |
|
|
|
748 |
$thisfile_mpeg_audio_lame_raw['RGAD_track'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xAB, 2)); |
|
|
749 |
$thisfile_mpeg_audio_lame_raw['RGAD_album'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xAD, 2)); |
|
|
750 |
|
|
|
751 |
|
|
|
752 |
if ($thisfile_mpeg_audio_lame_raw['RGAD_track'] != 0) { |
|
|
753 |
|
|
|
754 |
$thisfile_mpeg_audio_lame_RGAD_track['raw']['name'] = ($thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0xE000) >> 13; |
|
|
755 |
$thisfile_mpeg_audio_lame_RGAD_track['raw']['originator'] = ($thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0x1C00) >> 10; |
|
|
756 |
$thisfile_mpeg_audio_lame_RGAD_track['raw']['sign_bit'] = ($thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0x0200) >> 9; |
|
|
757 |
$thisfile_mpeg_audio_lame_RGAD_track['raw']['gain_adjust'] = $thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0x01FF; |
|
|
758 |
$thisfile_mpeg_audio_lame_RGAD_track['name'] = getid3_lib::RGADnameLookup($thisfile_mpeg_audio_lame_RGAD_track['raw']['name']); |
|
|
759 |
$thisfile_mpeg_audio_lame_RGAD_track['originator'] = getid3_lib::RGADoriginatorLookup($thisfile_mpeg_audio_lame_RGAD_track['raw']['originator']); |
|
|
760 |
$thisfile_mpeg_audio_lame_RGAD_track['gain_db'] = getid3_lib::RGADadjustmentLookup($thisfile_mpeg_audio_lame_RGAD_track['raw']['gain_adjust'], $thisfile_mpeg_audio_lame_RGAD_track['raw']['sign_bit']); |
|
|
761 |
|
|
|
762 |
if (!empty($thisfile_mpeg_audio_lame_RGAD['peak_amplitude'])) { |
|
|
763 |
$info['replay_gain']['track']['peak'] = $thisfile_mpeg_audio_lame_RGAD['peak_amplitude']; |
|
|
764 |
} |
|
|
765 |
$info['replay_gain']['track']['originator'] = $thisfile_mpeg_audio_lame_RGAD_track['originator']; |
|
|
766 |
$info['replay_gain']['track']['adjustment'] = $thisfile_mpeg_audio_lame_RGAD_track['gain_db']; |
|
|
767 |
} else { |
|
|
768 |
unset($thisfile_mpeg_audio_lame_RGAD['track']); |
|
|
769 |
} |
|
|
770 |
if ($thisfile_mpeg_audio_lame_raw['RGAD_album'] != 0) { |
|
|
771 |
|
|
|
772 |
$thisfile_mpeg_audio_lame_RGAD_album['raw']['name'] = ($thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0xE000) >> 13; |
|
|
773 |
$thisfile_mpeg_audio_lame_RGAD_album['raw']['originator'] = ($thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0x1C00) >> 10; |
|
|
774 |
$thisfile_mpeg_audio_lame_RGAD_album['raw']['sign_bit'] = ($thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0x0200) >> 9; |
|
|
775 |
$thisfile_mpeg_audio_lame_RGAD_album['raw']['gain_adjust'] = $thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0x01FF; |
|
|
776 |
$thisfile_mpeg_audio_lame_RGAD_album['name'] = getid3_lib::RGADnameLookup($thisfile_mpeg_audio_lame_RGAD_album['raw']['name']); |
|
|
777 |
$thisfile_mpeg_audio_lame_RGAD_album['originator'] = getid3_lib::RGADoriginatorLookup($thisfile_mpeg_audio_lame_RGAD_album['raw']['originator']); |
|
|
778 |
$thisfile_mpeg_audio_lame_RGAD_album['gain_db'] = getid3_lib::RGADadjustmentLookup($thisfile_mpeg_audio_lame_RGAD_album['raw']['gain_adjust'], $thisfile_mpeg_audio_lame_RGAD_album['raw']['sign_bit']); |
|
|
779 |
|
|
|
780 |
if (!empty($thisfile_mpeg_audio_lame_RGAD['peak_amplitude'])) { |
|
|
781 |
$info['replay_gain']['album']['peak'] = $thisfile_mpeg_audio_lame_RGAD['peak_amplitude']; |
|
|
782 |
} |
|
|
783 |
$info['replay_gain']['album']['originator'] = $thisfile_mpeg_audio_lame_RGAD_album['originator']; |
|
|
784 |
$info['replay_gain']['album']['adjustment'] = $thisfile_mpeg_audio_lame_RGAD_album['gain_db']; |
|
|
785 |
} else { |
|
|
786 |
unset($thisfile_mpeg_audio_lame_RGAD['album']); |
|
|
787 |
} |
|
|
788 |
if (empty($thisfile_mpeg_audio_lame_RGAD)) { |
|
|
789 |
unset($thisfile_mpeg_audio_lame['RGAD']); |
|
|
790 |
} |
|
|
791 |
|
|
|
792 |
|
|
|
793 |
// byte $AF Encoding flags + ATH Type |
|
|
794 |
$EncodingFlagsATHtype = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xAF, 1)); |
|
|
795 |
$thisfile_mpeg_audio_lame['encoding_flags']['nspsytune'] = (bool) ($EncodingFlagsATHtype & 0x10); |
|
|
796 |
$thisfile_mpeg_audio_lame['encoding_flags']['nssafejoint'] = (bool) ($EncodingFlagsATHtype & 0x20); |
|
|
797 |
$thisfile_mpeg_audio_lame['encoding_flags']['nogap_next'] = (bool) ($EncodingFlagsATHtype & 0x40); |
|
|
798 |
$thisfile_mpeg_audio_lame['encoding_flags']['nogap_prev'] = (bool) ($EncodingFlagsATHtype & 0x80); |
|
|
799 |
$thisfile_mpeg_audio_lame['ath_type'] = $EncodingFlagsATHtype & 0x0F; |
|
|
800 |
|
|
|
801 |
// byte $B0 if ABR {specified bitrate} else {minimal bitrate} |
|
|
802 |
$thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB0, 1)); |
|
|
803 |
if ($thisfile_mpeg_audio_lame_raw['vbr_method'] == 2) { // Average BitRate (ABR) |
|
|
804 |
$thisfile_mpeg_audio_lame['bitrate_abr'] = $thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate']; |
|
|
805 |
} elseif ($thisfile_mpeg_audio_lame_raw['vbr_method'] == 1) { // Constant BitRate (CBR) |
|
|
806 |
// ignore |
|
|
807 |
} elseif ($thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate'] > 0) { // Variable BitRate (VBR) - minimum bitrate |
|
|
808 |
$thisfile_mpeg_audio_lame['bitrate_min'] = $thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate']; |
|
|
809 |
} |
|
|
810 |
|
|
|
811 |
// bytes $B1-$B3 Encoder delays |
|
|
812 |
$EncoderDelays = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB1, 3)); |
|
|
813 |
$thisfile_mpeg_audio_lame['encoder_delay'] = ($EncoderDelays & 0xFFF000) >> 12; |
|
|
814 |
$thisfile_mpeg_audio_lame['end_padding'] = $EncoderDelays & 0x000FFF; |
|
|
815 |
|
|
|
816 |
// byte $B4 Misc |
|
|
817 |
$MiscByte = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB4, 1)); |
|
|
818 |
$thisfile_mpeg_audio_lame_raw['noise_shaping'] = ($MiscByte & 0x03); |
|
|
819 |
$thisfile_mpeg_audio_lame_raw['stereo_mode'] = ($MiscByte & 0x1C) >> 2; |
|
|
820 |
$thisfile_mpeg_audio_lame_raw['not_optimal_quality'] = ($MiscByte & 0x20) >> 5; |
|
|
821 |
$thisfile_mpeg_audio_lame_raw['source_sample_freq'] = ($MiscByte & 0xC0) >> 6; |
|
|
822 |
$thisfile_mpeg_audio_lame['noise_shaping'] = $thisfile_mpeg_audio_lame_raw['noise_shaping']; |
|
|
823 |
$thisfile_mpeg_audio_lame['stereo_mode'] = self::LAMEmiscStereoModeLookup($thisfile_mpeg_audio_lame_raw['stereo_mode']); |
|
|
824 |
$thisfile_mpeg_audio_lame['not_optimal_quality'] = (bool) $thisfile_mpeg_audio_lame_raw['not_optimal_quality']; |
|
|
825 |
$thisfile_mpeg_audio_lame['source_sample_freq'] = self::LAMEmiscSourceSampleFrequencyLookup($thisfile_mpeg_audio_lame_raw['source_sample_freq']); |
|
|
826 |
|
|
|
827 |
// byte $B5 MP3 Gain |
|
|
828 |
$thisfile_mpeg_audio_lame_raw['mp3_gain'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB5, 1), false, true); |
|
|
829 |
$thisfile_mpeg_audio_lame['mp3_gain_db'] = (getid3_lib::RGADamplitude2dB(2) / 4) * $thisfile_mpeg_audio_lame_raw['mp3_gain']; |
|
|
830 |
$thisfile_mpeg_audio_lame['mp3_gain_factor'] = pow(2, ($thisfile_mpeg_audio_lame['mp3_gain_db'] / 6)); |
|
|
831 |
|
|
|
832 |
// bytes $B6-$B7 Preset and surround info |
|
|
833 |
$PresetSurroundBytes = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB6, 2)); |
|
|
834 |
// Reserved = ($PresetSurroundBytes & 0xC000); |
|
|
835 |
$thisfile_mpeg_audio_lame_raw['surround_info'] = ($PresetSurroundBytes & 0x3800); |
|
|
836 |
$thisfile_mpeg_audio_lame['surround_info'] = self::LAMEsurroundInfoLookup($thisfile_mpeg_audio_lame_raw['surround_info']); |
|
|
837 |
$thisfile_mpeg_audio_lame['preset_used_id'] = ($PresetSurroundBytes & 0x07FF); |
|
|
838 |
$thisfile_mpeg_audio_lame['preset_used'] = self::LAMEpresetUsedLookup($thisfile_mpeg_audio_lame); |
|
|
839 |
if (!empty($thisfile_mpeg_audio_lame['preset_used_id']) && empty($thisfile_mpeg_audio_lame['preset_used'])) { |
|
|
840 |
$info['warning'][] = 'Unknown LAME preset used ('.$thisfile_mpeg_audio_lame['preset_used_id'].') - please report to info@getid3.org'; |
|
|
841 |
} |
|
|
842 |
if (($thisfile_mpeg_audio_lame['short_version'] == 'LAME3.90.') && !empty($thisfile_mpeg_audio_lame['preset_used_id'])) { |
|
|
843 |
// this may change if 3.90.4 ever comes out |
|
|
844 |
$thisfile_mpeg_audio_lame['short_version'] = 'LAME3.90.3'; |
|
|
845 |
} |
|
|
846 |
|
|
|
847 |
// bytes $B8-$BB MusicLength |
|
|
848 |
$thisfile_mpeg_audio_lame['audio_bytes'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB8, 4)); |
|
|
849 |
$ExpectedNumberOfAudioBytes = (($thisfile_mpeg_audio_lame['audio_bytes'] > 0) ? $thisfile_mpeg_audio_lame['audio_bytes'] : $thisfile_mpeg_audio['VBR_bytes']); |
|
|
850 |
|
|
|
851 |
// bytes $BC-$BD MusicCRC |
|
|
852 |
$thisfile_mpeg_audio_lame['music_crc'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xBC, 2)); |
|
|
853 |
|
|
|
854 |
// bytes $BE-$BF CRC-16 of Info Tag |
|
|
855 |
$thisfile_mpeg_audio_lame['lame_tag_crc'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xBE, 2)); |
|
|
856 |
|
|
|
857 |
|
|
|
858 |
// LAME CBR |
|
|
859 |
if ($thisfile_mpeg_audio_lame_raw['vbr_method'] == 1) { |
|
|
860 |
|
|
|
861 |
$thisfile_mpeg_audio['bitrate_mode'] = 'cbr'; |
|
|
862 |
$thisfile_mpeg_audio['bitrate'] = self::ClosestStandardMP3Bitrate($thisfile_mpeg_audio['bitrate']); |
|
|
863 |
$info['audio']['bitrate'] = $thisfile_mpeg_audio['bitrate']; |
|
|
864 |
//if (empty($thisfile_mpeg_audio['bitrate']) || (!empty($thisfile_mpeg_audio_lame['bitrate_min']) && ($thisfile_mpeg_audio_lame['bitrate_min'] != 255))) { |
|
|
865 |
// $thisfile_mpeg_audio['bitrate'] = $thisfile_mpeg_audio_lame['bitrate_min']; |
|
|
866 |
//} |
|
|
867 |
|
|
|
868 |
} |
|
|
869 |
|
|
|
870 |
} |
|
|
871 |
} |
|
|
872 |
|
|
|
873 |
} else { |
|
|
874 |
|
|
|
875 |
// not Fraunhofer or Xing VBR methods, most likely CBR (but could be VBR with no header) |
|
|
876 |
$thisfile_mpeg_audio['bitrate_mode'] = 'cbr'; |
|
|
877 |
if ($recursivesearch) { |
|
|
878 |
$thisfile_mpeg_audio['bitrate_mode'] = 'vbr'; |
|
|
879 |
if ($this->RecursiveFrameScanning($offset, $nextframetestoffset, true)) { |
|
|
880 |
$recursivesearch = false; |
|
|
881 |
$thisfile_mpeg_audio['bitrate_mode'] = 'cbr'; |
|
|
882 |
} |
|
|
883 |
if ($thisfile_mpeg_audio['bitrate_mode'] == 'vbr') { |
|
|
884 |
$info['warning'][] = 'VBR file with no VBR header. Bitrate values calculated from actual frame bitrates.'; |
|
|
885 |
} |
|
|
886 |
} |
|
|
887 |
|
|
|
888 |
} |
|
|
889 |
|
|
|
890 |
} |
|
|
891 |
|
|
|
892 |
if (($ExpectedNumberOfAudioBytes > 0) && ($ExpectedNumberOfAudioBytes != ($info['avdataend'] - $info['avdataoffset']))) { |
|
|
893 |
if ($ExpectedNumberOfAudioBytes > ($info['avdataend'] - $info['avdataoffset'])) { |
|
5
|
894 |
if ($this->isDependencyFor('matroska') || $this->isDependencyFor('riff')) { |
|
0
|
895 |
// ignore, audio data is broken into chunks so will always be data "missing" |
|
5
|
896 |
} |
|
|
897 |
elseif (($ExpectedNumberOfAudioBytes - ($info['avdataend'] - $info['avdataoffset'])) == 1) { |
|
|
898 |
$this->warning('Last byte of data truncated (this is a known bug in Meracl ID3 Tag Writer before v1.3.5)'); |
|
|
899 |
} |
|
|
900 |
else { |
|
|
901 |
$this->warning('Probable truncated file: expecting '.$ExpectedNumberOfAudioBytes.' bytes of audio data, only found '.($info['avdataend'] - $info['avdataoffset']).' (short by '.($ExpectedNumberOfAudioBytes - ($info['avdataend'] - $info['avdataoffset'])).' bytes)'); |
|
0
|
902 |
} |
|
|
903 |
} else { |
|
|
904 |
if ((($info['avdataend'] - $info['avdataoffset']) - $ExpectedNumberOfAudioBytes) == 1) { |
|
5
|
905 |
// $prenullbytefileoffset = $this->ftell(); |
|
|
906 |
// $this->fseek($info['avdataend']); |
|
|
907 |
// $PossibleNullByte = $this->fread(1); |
|
|
908 |
// $this->fseek($prenullbytefileoffset); |
|
0
|
909 |
// if ($PossibleNullByte === "\x00") { |
|
|
910 |
$info['avdataend']--; |
|
|
911 |
// $info['warning'][] = 'Extra null byte at end of MP3 data assumed to be RIFF padding and therefore ignored'; |
|
|
912 |
// } else { |
|
|
913 |
// $info['warning'][] = 'Too much data in file: expecting '.$ExpectedNumberOfAudioBytes.' bytes of audio data, found '.($info['avdataend'] - $info['avdataoffset']).' ('.(($info['avdataend'] - $info['avdataoffset']) - $ExpectedNumberOfAudioBytes).' bytes too many)'; |
|
|
914 |
// } |
|
|
915 |
} else { |
|
|
916 |
$info['warning'][] = 'Too much data in file: expecting '.$ExpectedNumberOfAudioBytes.' bytes of audio data, found '.($info['avdataend'] - $info['avdataoffset']).' ('.(($info['avdataend'] - $info['avdataoffset']) - $ExpectedNumberOfAudioBytes).' bytes too many)'; |
|
|
917 |
} |
|
|
918 |
} |
|
|
919 |
} |
|
|
920 |
|
|
|
921 |
if (($thisfile_mpeg_audio['bitrate'] == 'free') && empty($info['audio']['bitrate'])) { |
|
|
922 |
if (($offset == $info['avdataoffset']) && empty($thisfile_mpeg_audio['VBR_frames'])) { |
|
|
923 |
$framebytelength = $this->FreeFormatFrameLength($offset, true); |
|
|
924 |
if ($framebytelength > 0) { |
|
|
925 |
$thisfile_mpeg_audio['framelength'] = $framebytelength; |
|
|
926 |
if ($thisfile_mpeg_audio['layer'] == '1') { |
|
|
927 |
// BitRate = (((FrameLengthInBytes / 4) - Padding) * SampleRate) / 12 |
|
|
928 |
$info['audio']['bitrate'] = ((($framebytelength / 4) - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 12; |
|
|
929 |
} else { |
|
|
930 |
// Bitrate = ((FrameLengthInBytes - Padding) * SampleRate) / 144 |
|
|
931 |
$info['audio']['bitrate'] = (($framebytelength - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 144; |
|
|
932 |
} |
|
|
933 |
} else { |
|
|
934 |
$info['error'][] = 'Error calculating frame length of free-format MP3 without Xing/LAME header'; |
|
|
935 |
} |
|
|
936 |
} |
|
|
937 |
} |
|
|
938 |
|
|
|
939 |
if (isset($thisfile_mpeg_audio['VBR_frames']) ? $thisfile_mpeg_audio['VBR_frames'] : '') { |
|
|
940 |
switch ($thisfile_mpeg_audio['bitrate_mode']) { |
|
|
941 |
case 'vbr': |
|
|
942 |
case 'abr': |
|
|
943 |
$bytes_per_frame = 1152; |
|
|
944 |
if (($thisfile_mpeg_audio['version'] == '1') && ($thisfile_mpeg_audio['layer'] == 1)) { |
|
|
945 |
$bytes_per_frame = 384; |
|
|
946 |
} elseif ((($thisfile_mpeg_audio['version'] == '2') || ($thisfile_mpeg_audio['version'] == '2.5')) && ($thisfile_mpeg_audio['layer'] == 3)) { |
|
|
947 |
$bytes_per_frame = 576; |
|
|
948 |
} |
|
|
949 |
$thisfile_mpeg_audio['VBR_bitrate'] = (isset($thisfile_mpeg_audio['VBR_bytes']) ? (($thisfile_mpeg_audio['VBR_bytes'] / $thisfile_mpeg_audio['VBR_frames']) * 8) * ($info['audio']['sample_rate'] / $bytes_per_frame) : 0); |
|
|
950 |
if ($thisfile_mpeg_audio['VBR_bitrate'] > 0) { |
|
|
951 |
$info['audio']['bitrate'] = $thisfile_mpeg_audio['VBR_bitrate']; |
|
|
952 |
$thisfile_mpeg_audio['bitrate'] = $thisfile_mpeg_audio['VBR_bitrate']; // to avoid confusion |
|
|
953 |
} |
|
|
954 |
break; |
|
|
955 |
} |
|
|
956 |
} |
|
|
957 |
|
|
|
958 |
// End variable-bitrate headers |
|
|
959 |
//////////////////////////////////////////////////////////////////////////////////// |
|
|
960 |
|
|
|
961 |
if ($recursivesearch) { |
|
|
962 |
|
|
|
963 |
if (!$this->RecursiveFrameScanning($offset, $nextframetestoffset, $ScanAsCBR)) { |
|
|
964 |
return false; |
|
|
965 |
} |
|
|
966 |
|
|
|
967 |
} |
|
|
968 |
|
|
|
969 |
|
|
|
970 |
//if (false) { |
|
|
971 |
// // experimental side info parsing section - not returning anything useful yet |
|
|
972 |
// |
|
|
973 |
// $SideInfoBitstream = getid3_lib::BigEndian2Bin($SideInfoData); |
|
|
974 |
// $SideInfoOffset = 0; |
|
|
975 |
// |
|
|
976 |
// if ($thisfile_mpeg_audio['version'] == '1') { |
|
|
977 |
// if ($thisfile_mpeg_audio['channelmode'] == 'mono') { |
|
|
978 |
// // MPEG-1 (mono) |
|
|
979 |
// $thisfile_mpeg_audio['side_info']['main_data_begin'] = substr($SideInfoBitstream, $SideInfoOffset, 9); |
|
|
980 |
// $SideInfoOffset += 9; |
|
|
981 |
// $SideInfoOffset += 5; |
|
|
982 |
// } else { |
|
|
983 |
// // MPEG-1 (stereo, joint-stereo, dual-channel) |
|
|
984 |
// $thisfile_mpeg_audio['side_info']['main_data_begin'] = substr($SideInfoBitstream, $SideInfoOffset, 9); |
|
|
985 |
// $SideInfoOffset += 9; |
|
|
986 |
// $SideInfoOffset += 3; |
|
|
987 |
// } |
|
|
988 |
// } else { // 2 or 2.5 |
|
|
989 |
// if ($thisfile_mpeg_audio['channelmode'] == 'mono') { |
|
|
990 |
// // MPEG-2, MPEG-2.5 (mono) |
|
|
991 |
// $thisfile_mpeg_audio['side_info']['main_data_begin'] = substr($SideInfoBitstream, $SideInfoOffset, 8); |
|
|
992 |
// $SideInfoOffset += 8; |
|
|
993 |
// $SideInfoOffset += 1; |
|
|
994 |
// } else { |
|
|
995 |
// // MPEG-2, MPEG-2.5 (stereo, joint-stereo, dual-channel) |
|
|
996 |
// $thisfile_mpeg_audio['side_info']['main_data_begin'] = substr($SideInfoBitstream, $SideInfoOffset, 8); |
|
|
997 |
// $SideInfoOffset += 8; |
|
|
998 |
// $SideInfoOffset += 2; |
|
|
999 |
// } |
|
|
1000 |
// } |
|
|
1001 |
// |
|
|
1002 |
// if ($thisfile_mpeg_audio['version'] == '1') { |
|
|
1003 |
// for ($channel = 0; $channel < $info['audio']['channels']; $channel++) { |
|
|
1004 |
// for ($scfsi_band = 0; $scfsi_band < 4; $scfsi_band++) { |
|
|
1005 |
// $thisfile_mpeg_audio['scfsi'][$channel][$scfsi_band] = substr($SideInfoBitstream, $SideInfoOffset, 1); |
|
|
1006 |
// $SideInfoOffset += 2; |
|
|
1007 |
// } |
|
|
1008 |
// } |
|
|
1009 |
// } |
|
|
1010 |
// for ($granule = 0; $granule < (($thisfile_mpeg_audio['version'] == '1') ? 2 : 1); $granule++) { |
|
|
1011 |
// for ($channel = 0; $channel < $info['audio']['channels']; $channel++) { |
|
|
1012 |
// $thisfile_mpeg_audio['part2_3_length'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 12); |
|
|
1013 |
// $SideInfoOffset += 12; |
|
|
1014 |
// $thisfile_mpeg_audio['big_values'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 9); |
|
|
1015 |
// $SideInfoOffset += 9; |
|
|
1016 |
// $thisfile_mpeg_audio['global_gain'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 8); |
|
|
1017 |
// $SideInfoOffset += 8; |
|
|
1018 |
// if ($thisfile_mpeg_audio['version'] == '1') { |
|
|
1019 |
// $thisfile_mpeg_audio['scalefac_compress'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 4); |
|
|
1020 |
// $SideInfoOffset += 4; |
|
|
1021 |
// } else { |
|
|
1022 |
// $thisfile_mpeg_audio['scalefac_compress'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 9); |
|
|
1023 |
// $SideInfoOffset += 9; |
|
|
1024 |
// } |
|
|
1025 |
// $thisfile_mpeg_audio['window_switching_flag'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1); |
|
|
1026 |
// $SideInfoOffset += 1; |
|
|
1027 |
// |
|
|
1028 |
// if ($thisfile_mpeg_audio['window_switching_flag'][$granule][$channel] == '1') { |
|
|
1029 |
// |
|
|
1030 |
// $thisfile_mpeg_audio['block_type'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 2); |
|
|
1031 |
// $SideInfoOffset += 2; |
|
|
1032 |
// $thisfile_mpeg_audio['mixed_block_flag'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1); |
|
|
1033 |
// $SideInfoOffset += 1; |
|
|
1034 |
// |
|
|
1035 |
// for ($region = 0; $region < 2; $region++) { |
|
|
1036 |
// $thisfile_mpeg_audio['table_select'][$granule][$channel][$region] = substr($SideInfoBitstream, $SideInfoOffset, 5); |
|
|
1037 |
// $SideInfoOffset += 5; |
|
|
1038 |
// } |
|
|
1039 |
// $thisfile_mpeg_audio['table_select'][$granule][$channel][2] = 0; |
|
|
1040 |
// |
|
|
1041 |
// for ($window = 0; $window < 3; $window++) { |
|
|
1042 |
// $thisfile_mpeg_audio['subblock_gain'][$granule][$channel][$window] = substr($SideInfoBitstream, $SideInfoOffset, 3); |
|
|
1043 |
// $SideInfoOffset += 3; |
|
|
1044 |
// } |
|
|
1045 |
// |
|
|
1046 |
// } else { |
|
|
1047 |
// |
|
|
1048 |
// for ($region = 0; $region < 3; $region++) { |
|
|
1049 |
// $thisfile_mpeg_audio['table_select'][$granule][$channel][$region] = substr($SideInfoBitstream, $SideInfoOffset, 5); |
|
|
1050 |
// $SideInfoOffset += 5; |
|
|
1051 |
// } |
|
|
1052 |
// |
|
|
1053 |
// $thisfile_mpeg_audio['region0_count'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 4); |
|
|
1054 |
// $SideInfoOffset += 4; |
|
|
1055 |
// $thisfile_mpeg_audio['region1_count'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 3); |
|
|
1056 |
// $SideInfoOffset += 3; |
|
|
1057 |
// $thisfile_mpeg_audio['block_type'][$granule][$channel] = 0; |
|
|
1058 |
// } |
|
|
1059 |
// |
|
|
1060 |
// if ($thisfile_mpeg_audio['version'] == '1') { |
|
|
1061 |
// $thisfile_mpeg_audio['preflag'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1); |
|
|
1062 |
// $SideInfoOffset += 1; |
|
|
1063 |
// } |
|
|
1064 |
// $thisfile_mpeg_audio['scalefac_scale'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1); |
|
|
1065 |
// $SideInfoOffset += 1; |
|
|
1066 |
// $thisfile_mpeg_audio['count1table_select'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1); |
|
|
1067 |
// $SideInfoOffset += 1; |
|
|
1068 |
// } |
|
|
1069 |
// } |
|
|
1070 |
//} |
|
|
1071 |
|
|
|
1072 |
return true; |
|
|
1073 |
} |
|
|
1074 |
|
|
|
1075 |
public function RecursiveFrameScanning(&$offset, &$nextframetestoffset, $ScanAsCBR) { |
|
|
1076 |
$info = &$this->getid3->info; |
|
|
1077 |
$firstframetestarray = array('error'=>'', 'warning'=>'', 'avdataend'=>$info['avdataend'], 'avdataoffset'=>$info['avdataoffset']); |
|
|
1078 |
$this->decodeMPEGaudioHeader($offset, $firstframetestarray, false); |
|
|
1079 |
|
|
|
1080 |
for ($i = 0; $i < GETID3_MP3_VALID_CHECK_FRAMES; $i++) { |
|
|
1081 |
// check next GETID3_MP3_VALID_CHECK_FRAMES frames for validity, to make sure we haven't run across a false synch |
|
|
1082 |
if (($nextframetestoffset + 4) >= $info['avdataend']) { |
|
|
1083 |
// end of file |
|
|
1084 |
return true; |
|
|
1085 |
} |
|
|
1086 |
|
|
|
1087 |
$nextframetestarray = array('error'=>'', 'warning'=>'', 'avdataend'=>$info['avdataend'], 'avdataoffset'=>$info['avdataoffset']); |
|
|
1088 |
if ($this->decodeMPEGaudioHeader($nextframetestoffset, $nextframetestarray, false)) { |
|
|
1089 |
if ($ScanAsCBR) { |
|
|
1090 |
// force CBR mode, used for trying to pick out invalid audio streams with valid(?) VBR headers, or VBR streams with no VBR header |
|
|
1091 |
if (!isset($nextframetestarray['mpeg']['audio']['bitrate']) || !isset($firstframetestarray['mpeg']['audio']['bitrate']) || ($nextframetestarray['mpeg']['audio']['bitrate'] != $firstframetestarray['mpeg']['audio']['bitrate'])) { |
|
|
1092 |
return false; |
|
|
1093 |
} |
|
|
1094 |
} |
|
|
1095 |
|
|
|
1096 |
|
|
|
1097 |
// next frame is OK, get ready to check the one after that |
|
|
1098 |
if (isset($nextframetestarray['mpeg']['audio']['framelength']) && ($nextframetestarray['mpeg']['audio']['framelength'] > 0)) { |
|
|
1099 |
$nextframetestoffset += $nextframetestarray['mpeg']['audio']['framelength']; |
|
|
1100 |
} else { |
|
|
1101 |
$info['error'][] = 'Frame at offset ('.$offset.') is has an invalid frame length.'; |
|
|
1102 |
return false; |
|
|
1103 |
} |
|
|
1104 |
|
|
|
1105 |
} elseif (!empty($firstframetestarray['mpeg']['audio']['framelength']) && (($nextframetestoffset + $firstframetestarray['mpeg']['audio']['framelength']) > $info['avdataend'])) { |
|
|
1106 |
|
|
|
1107 |
// 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 |
|
|
1108 |
return true; |
|
|
1109 |
|
|
|
1110 |
} else { |
|
|
1111 |
|
|
|
1112 |
// next frame is not valid, note the error and fail, so scanning can contiue for a valid frame sequence |
|
|
1113 |
$info['warning'][] = 'Frame at offset ('.$offset.') is valid, but the next one at ('.$nextframetestoffset.') is not.'; |
|
|
1114 |
|
|
|
1115 |
return false; |
|
|
1116 |
} |
|
|
1117 |
} |
|
|
1118 |
return true; |
|
|
1119 |
} |
|
|
1120 |
|
|
|
1121 |
public function FreeFormatFrameLength($offset, $deepscan=false) { |
|
|
1122 |
$info = &$this->getid3->info; |
|
|
1123 |
|
|
5
|
1124 |
$this->fseek($offset); |
|
|
1125 |
$MPEGaudioData = $this->fread(32768); |
|
0
|
1126 |
|
|
|
1127 |
$SyncPattern1 = substr($MPEGaudioData, 0, 4); |
|
|
1128 |
// may be different pattern due to padding |
|
|
1129 |
$SyncPattern2 = $SyncPattern1{0}.$SyncPattern1{1}.chr(ord($SyncPattern1{2}) | 0x02).$SyncPattern1{3}; |
|
|
1130 |
if ($SyncPattern2 === $SyncPattern1) { |
|
|
1131 |
$SyncPattern2 = $SyncPattern1{0}.$SyncPattern1{1}.chr(ord($SyncPattern1{2}) & 0xFD).$SyncPattern1{3}; |
|
|
1132 |
} |
|
|
1133 |
|
|
|
1134 |
$framelength = false; |
|
|
1135 |
$framelength1 = strpos($MPEGaudioData, $SyncPattern1, 4); |
|
|
1136 |
$framelength2 = strpos($MPEGaudioData, $SyncPattern2, 4); |
|
|
1137 |
if ($framelength1 > 4) { |
|
|
1138 |
$framelength = $framelength1; |
|
|
1139 |
} |
|
|
1140 |
if (($framelength2 > 4) && ($framelength2 < $framelength1)) { |
|
|
1141 |
$framelength = $framelength2; |
|
|
1142 |
} |
|
|
1143 |
if (!$framelength) { |
|
|
1144 |
|
|
|
1145 |
// LAME 3.88 has a different value for modeextension on the first frame vs the rest |
|
|
1146 |
$framelength1 = strpos($MPEGaudioData, substr($SyncPattern1, 0, 3), 4); |
|
|
1147 |
$framelength2 = strpos($MPEGaudioData, substr($SyncPattern2, 0, 3), 4); |
|
|
1148 |
|
|
|
1149 |
if ($framelength1 > 4) { |
|
|
1150 |
$framelength = $framelength1; |
|
|
1151 |
} |
|
|
1152 |
if (($framelength2 > 4) && ($framelength2 < $framelength1)) { |
|
|
1153 |
$framelength = $framelength2; |
|
|
1154 |
} |
|
|
1155 |
if (!$framelength) { |
|
|
1156 |
$info['error'][] = 'Cannot find next free-format synch pattern ('.getid3_lib::PrintHexBytes($SyncPattern1).' or '.getid3_lib::PrintHexBytes($SyncPattern2).') after offset '.$offset; |
|
|
1157 |
return false; |
|
|
1158 |
} else { |
|
|
1159 |
$info['warning'][] = 'ModeExtension varies between first frame and other frames (known free-format issue in LAME 3.88)'; |
|
|
1160 |
$info['audio']['codec'] = 'LAME'; |
|
|
1161 |
$info['audio']['encoder'] = 'LAME3.88'; |
|
|
1162 |
$SyncPattern1 = substr($SyncPattern1, 0, 3); |
|
|
1163 |
$SyncPattern2 = substr($SyncPattern2, 0, 3); |
|
|
1164 |
} |
|
|
1165 |
} |
|
|
1166 |
|
|
|
1167 |
if ($deepscan) { |
|
|
1168 |
|
|
|
1169 |
$ActualFrameLengthValues = array(); |
|
|
1170 |
$nextoffset = $offset + $framelength; |
|
|
1171 |
while ($nextoffset < ($info['avdataend'] - 6)) { |
|
5
|
1172 |
$this->fseek($nextoffset - 1); |
|
|
1173 |
$NextSyncPattern = $this->fread(6); |
|
0
|
1174 |
if ((substr($NextSyncPattern, 1, strlen($SyncPattern1)) == $SyncPattern1) || (substr($NextSyncPattern, 1, strlen($SyncPattern2)) == $SyncPattern2)) { |
|
|
1175 |
// good - found where expected |
|
|
1176 |
$ActualFrameLengthValues[] = $framelength; |
|
|
1177 |
} elseif ((substr($NextSyncPattern, 0, strlen($SyncPattern1)) == $SyncPattern1) || (substr($NextSyncPattern, 0, strlen($SyncPattern2)) == $SyncPattern2)) { |
|
|
1178 |
// ok - found one byte earlier than expected (last frame wasn't padded, first frame was) |
|
|
1179 |
$ActualFrameLengthValues[] = ($framelength - 1); |
|
|
1180 |
$nextoffset--; |
|
|
1181 |
} elseif ((substr($NextSyncPattern, 2, strlen($SyncPattern1)) == $SyncPattern1) || (substr($NextSyncPattern, 2, strlen($SyncPattern2)) == $SyncPattern2)) { |
|
|
1182 |
// ok - found one byte later than expected (last frame was padded, first frame wasn't) |
|
|
1183 |
$ActualFrameLengthValues[] = ($framelength + 1); |
|
|
1184 |
$nextoffset++; |
|
|
1185 |
} else { |
|
|
1186 |
$info['error'][] = 'Did not find expected free-format sync pattern at offset '.$nextoffset; |
|
|
1187 |
return false; |
|
|
1188 |
} |
|
|
1189 |
$nextoffset += $framelength; |
|
|
1190 |
} |
|
|
1191 |
if (count($ActualFrameLengthValues) > 0) { |
|
|
1192 |
$framelength = intval(round(array_sum($ActualFrameLengthValues) / count($ActualFrameLengthValues))); |
|
|
1193 |
} |
|
|
1194 |
} |
|
|
1195 |
return $framelength; |
|
|
1196 |
} |
|
|
1197 |
|
|
|
1198 |
public function getOnlyMPEGaudioInfoBruteForce() { |
|
|
1199 |
$MPEGaudioHeaderDecodeCache = array(); |
|
|
1200 |
$MPEGaudioHeaderValidCache = array(); |
|
|
1201 |
$MPEGaudioHeaderLengthCache = array(); |
|
|
1202 |
$MPEGaudioVersionLookup = self::MPEGaudioVersionArray(); |
|
|
1203 |
$MPEGaudioLayerLookup = self::MPEGaudioLayerArray(); |
|
|
1204 |
$MPEGaudioBitrateLookup = self::MPEGaudioBitrateArray(); |
|
|
1205 |
$MPEGaudioFrequencyLookup = self::MPEGaudioFrequencyArray(); |
|
|
1206 |
$MPEGaudioChannelModeLookup = self::MPEGaudioChannelModeArray(); |
|
|
1207 |
$MPEGaudioModeExtensionLookup = self::MPEGaudioModeExtensionArray(); |
|
|
1208 |
$MPEGaudioEmphasisLookup = self::MPEGaudioEmphasisArray(); |
|
|
1209 |
$LongMPEGversionLookup = array(); |
|
|
1210 |
$LongMPEGlayerLookup = array(); |
|
|
1211 |
$LongMPEGbitrateLookup = array(); |
|
|
1212 |
$LongMPEGpaddingLookup = array(); |
|
|
1213 |
$LongMPEGfrequencyLookup = array(); |
|
|
1214 |
$Distribution['bitrate'] = array(); |
|
|
1215 |
$Distribution['frequency'] = array(); |
|
|
1216 |
$Distribution['layer'] = array(); |
|
|
1217 |
$Distribution['version'] = array(); |
|
|
1218 |
$Distribution['padding'] = array(); |
|
|
1219 |
|
|
|
1220 |
$info = &$this->getid3->info; |
|
5
|
1221 |
$this->fseek($info['avdataoffset']); |
|
0
|
1222 |
|
|
|
1223 |
$max_frames_scan = 5000; |
|
|
1224 |
$frames_scanned = 0; |
|
|
1225 |
|
|
|
1226 |
$previousvalidframe = $info['avdataoffset']; |
|
5
|
1227 |
while ($this->ftell() < $info['avdataend']) { |
|
0
|
1228 |
set_time_limit(30); |
|
5
|
1229 |
$head4 = $this->fread(4); |
|
0
|
1230 |
if (strlen($head4) < 4) { |
|
|
1231 |
break; |
|
|
1232 |
} |
|
|
1233 |
if ($head4{0} != "\xFF") { |
|
|
1234 |
for ($i = 1; $i < 4; $i++) { |
|
|
1235 |
if ($head4{$i} == "\xFF") { |
|
5
|
1236 |
$this->fseek($i - 4, SEEK_CUR); |
|
0
|
1237 |
continue 2; |
|
|
1238 |
} |
|
|
1239 |
} |
|
|
1240 |
continue; |
|
|
1241 |
} |
|
|
1242 |
if (!isset($MPEGaudioHeaderDecodeCache[$head4])) { |
|
|
1243 |
$MPEGaudioHeaderDecodeCache[$head4] = self::MPEGaudioHeaderDecode($head4); |
|
|
1244 |
} |
|
|
1245 |
if (!isset($MPEGaudioHeaderValidCache[$head4])) { |
|
|
1246 |
$MPEGaudioHeaderValidCache[$head4] = self::MPEGaudioHeaderValid($MPEGaudioHeaderDecodeCache[$head4], false, false); |
|
|
1247 |
} |
|
|
1248 |
if ($MPEGaudioHeaderValidCache[$head4]) { |
|
|
1249 |
|
|
|
1250 |
if (!isset($MPEGaudioHeaderLengthCache[$head4])) { |
|
|
1251 |
$LongMPEGversionLookup[$head4] = $MPEGaudioVersionLookup[$MPEGaudioHeaderDecodeCache[$head4]['version']]; |
|
|
1252 |
$LongMPEGlayerLookup[$head4] = $MPEGaudioLayerLookup[$MPEGaudioHeaderDecodeCache[$head4]['layer']]; |
|
|
1253 |
$LongMPEGbitrateLookup[$head4] = $MPEGaudioBitrateLookup[$LongMPEGversionLookup[$head4]][$LongMPEGlayerLookup[$head4]][$MPEGaudioHeaderDecodeCache[$head4]['bitrate']]; |
|
|
1254 |
$LongMPEGpaddingLookup[$head4] = (bool) $MPEGaudioHeaderDecodeCache[$head4]['padding']; |
|
|
1255 |
$LongMPEGfrequencyLookup[$head4] = $MPEGaudioFrequencyLookup[$LongMPEGversionLookup[$head4]][$MPEGaudioHeaderDecodeCache[$head4]['sample_rate']]; |
|
|
1256 |
$MPEGaudioHeaderLengthCache[$head4] = self::MPEGaudioFrameLength( |
|
|
1257 |
$LongMPEGbitrateLookup[$head4], |
|
|
1258 |
$LongMPEGversionLookup[$head4], |
|
|
1259 |
$LongMPEGlayerLookup[$head4], |
|
|
1260 |
$LongMPEGpaddingLookup[$head4], |
|
|
1261 |
$LongMPEGfrequencyLookup[$head4]); |
|
|
1262 |
} |
|
|
1263 |
if ($MPEGaudioHeaderLengthCache[$head4] > 4) { |
|
5
|
1264 |
$WhereWeWere = $this->ftell(); |
|
|
1265 |
$this->fseek($MPEGaudioHeaderLengthCache[$head4] - 4, SEEK_CUR); |
|
|
1266 |
$next4 = $this->fread(4); |
|
0
|
1267 |
if ($next4{0} == "\xFF") { |
|
|
1268 |
if (!isset($MPEGaudioHeaderDecodeCache[$next4])) { |
|
|
1269 |
$MPEGaudioHeaderDecodeCache[$next4] = self::MPEGaudioHeaderDecode($next4); |
|
|
1270 |
} |
|
|
1271 |
if (!isset($MPEGaudioHeaderValidCache[$next4])) { |
|
|
1272 |
$MPEGaudioHeaderValidCache[$next4] = self::MPEGaudioHeaderValid($MPEGaudioHeaderDecodeCache[$next4], false, false); |
|
|
1273 |
} |
|
|
1274 |
if ($MPEGaudioHeaderValidCache[$next4]) { |
|
5
|
1275 |
$this->fseek(-4, SEEK_CUR); |
|
0
|
1276 |
|
|
|
1277 |
getid3_lib::safe_inc($Distribution['bitrate'][$LongMPEGbitrateLookup[$head4]]); |
|
|
1278 |
getid3_lib::safe_inc($Distribution['layer'][$LongMPEGlayerLookup[$head4]]); |
|
|
1279 |
getid3_lib::safe_inc($Distribution['version'][$LongMPEGversionLookup[$head4]]); |
|
|
1280 |
getid3_lib::safe_inc($Distribution['padding'][intval($LongMPEGpaddingLookup[$head4])]); |
|
|
1281 |
getid3_lib::safe_inc($Distribution['frequency'][$LongMPEGfrequencyLookup[$head4]]); |
|
|
1282 |
if ($max_frames_scan && (++$frames_scanned >= $max_frames_scan)) { |
|
5
|
1283 |
$pct_data_scanned = ($this->ftell() - $info['avdataoffset']) / ($info['avdataend'] - $info['avdataoffset']); |
|
0
|
1284 |
$info['warning'][] = 'too many MPEG audio frames to scan, only scanned first '.$max_frames_scan.' frames ('.number_format($pct_data_scanned * 100, 1).'% of file) and extrapolated distribution, playtime and bitrate may be incorrect.'; |
|
|
1285 |
foreach ($Distribution as $key1 => $value1) { |
|
|
1286 |
foreach ($value1 as $key2 => $value2) { |
|
|
1287 |
$Distribution[$key1][$key2] = round($value2 / $pct_data_scanned); |
|
|
1288 |
} |
|
|
1289 |
} |
|
|
1290 |
break; |
|
|
1291 |
} |
|
|
1292 |
continue; |
|
|
1293 |
} |
|
|
1294 |
} |
|
|
1295 |
unset($next4); |
|
5
|
1296 |
$this->fseek($WhereWeWere - 3); |
|
0
|
1297 |
} |
|
|
1298 |
|
|
|
1299 |
} |
|
|
1300 |
} |
|
|
1301 |
foreach ($Distribution as $key => $value) { |
|
|
1302 |
ksort($Distribution[$key], SORT_NUMERIC); |
|
|
1303 |
} |
|
|
1304 |
ksort($Distribution['version'], SORT_STRING); |
|
|
1305 |
$info['mpeg']['audio']['bitrate_distribution'] = $Distribution['bitrate']; |
|
|
1306 |
$info['mpeg']['audio']['frequency_distribution'] = $Distribution['frequency']; |
|
|
1307 |
$info['mpeg']['audio']['layer_distribution'] = $Distribution['layer']; |
|
|
1308 |
$info['mpeg']['audio']['version_distribution'] = $Distribution['version']; |
|
|
1309 |
$info['mpeg']['audio']['padding_distribution'] = $Distribution['padding']; |
|
|
1310 |
if (count($Distribution['version']) > 1) { |
|
|
1311 |
$info['error'][] = 'Corrupt file - more than one MPEG version detected'; |
|
|
1312 |
} |
|
|
1313 |
if (count($Distribution['layer']) > 1) { |
|
|
1314 |
$info['error'][] = 'Corrupt file - more than one MPEG layer detected'; |
|
|
1315 |
} |
|
|
1316 |
if (count($Distribution['frequency']) > 1) { |
|
|
1317 |
$info['error'][] = 'Corrupt file - more than one MPEG sample rate detected'; |
|
|
1318 |
} |
|
|
1319 |
|
|
|
1320 |
|
|
|
1321 |
$bittotal = 0; |
|
|
1322 |
foreach ($Distribution['bitrate'] as $bitratevalue => $bitratecount) { |
|
|
1323 |
if ($bitratevalue != 'free') { |
|
|
1324 |
$bittotal += ($bitratevalue * $bitratecount); |
|
|
1325 |
} |
|
|
1326 |
} |
|
|
1327 |
$info['mpeg']['audio']['frame_count'] = array_sum($Distribution['bitrate']); |
|
|
1328 |
if ($info['mpeg']['audio']['frame_count'] == 0) { |
|
|
1329 |
$info['error'][] = 'no MPEG audio frames found'; |
|
|
1330 |
return false; |
|
|
1331 |
} |
|
|
1332 |
$info['mpeg']['audio']['bitrate'] = ($bittotal / $info['mpeg']['audio']['frame_count']); |
|
|
1333 |
$info['mpeg']['audio']['bitrate_mode'] = ((count($Distribution['bitrate']) > 0) ? 'vbr' : 'cbr'); |
|
|
1334 |
$info['mpeg']['audio']['sample_rate'] = getid3_lib::array_max($Distribution['frequency'], true); |
|
|
1335 |
|
|
|
1336 |
$info['audio']['bitrate'] = $info['mpeg']['audio']['bitrate']; |
|
|
1337 |
$info['audio']['bitrate_mode'] = $info['mpeg']['audio']['bitrate_mode']; |
|
|
1338 |
$info['audio']['sample_rate'] = $info['mpeg']['audio']['sample_rate']; |
|
|
1339 |
$info['audio']['dataformat'] = 'mp'.getid3_lib::array_max($Distribution['layer'], true); |
|
|
1340 |
$info['fileformat'] = $info['audio']['dataformat']; |
|
|
1341 |
|
|
|
1342 |
return true; |
|
|
1343 |
} |
|
|
1344 |
|
|
|
1345 |
|
|
|
1346 |
public function getOnlyMPEGaudioInfo($avdataoffset, $BitrateHistogram=false) { |
|
|
1347 |
// looks for synch, decodes MPEG audio header |
|
|
1348 |
|
|
|
1349 |
$info = &$this->getid3->info; |
|
|
1350 |
|
|
|
1351 |
static $MPEGaudioVersionLookup; |
|
|
1352 |
static $MPEGaudioLayerLookup; |
|
|
1353 |
static $MPEGaudioBitrateLookup; |
|
|
1354 |
if (empty($MPEGaudioVersionLookup)) { |
|
|
1355 |
$MPEGaudioVersionLookup = self::MPEGaudioVersionArray(); |
|
|
1356 |
$MPEGaudioLayerLookup = self::MPEGaudioLayerArray(); |
|
|
1357 |
$MPEGaudioBitrateLookup = self::MPEGaudioBitrateArray(); |
|
|
1358 |
|
|
|
1359 |
} |
|
|
1360 |
|
|
5
|
1361 |
$this->fseek($avdataoffset); |
|
0
|
1362 |
$sync_seek_buffer_size = min(128 * 1024, $info['avdataend'] - $avdataoffset); |
|
|
1363 |
if ($sync_seek_buffer_size <= 0) { |
|
|
1364 |
$info['error'][] = 'Invalid $sync_seek_buffer_size at offset '.$avdataoffset; |
|
|
1365 |
return false; |
|
|
1366 |
} |
|
5
|
1367 |
$header = $this->fread($sync_seek_buffer_size); |
|
0
|
1368 |
$sync_seek_buffer_size = strlen($header); |
|
|
1369 |
$SynchSeekOffset = 0; |
|
|
1370 |
while ($SynchSeekOffset < $sync_seek_buffer_size) { |
|
|
1371 |
if ((($avdataoffset + $SynchSeekOffset) < $info['avdataend']) && !feof($this->getid3->fp)) { |
|
|
1372 |
|
|
|
1373 |
if ($SynchSeekOffset > $sync_seek_buffer_size) { |
|
|
1374 |
// if a synch's not found within the first 128k bytes, then give up |
|
|
1375 |
$info['error'][] = 'Could not find valid MPEG audio synch within the first '.round($sync_seek_buffer_size / 1024).'kB'; |
|
|
1376 |
if (isset($info['audio']['bitrate'])) { |
|
|
1377 |
unset($info['audio']['bitrate']); |
|
|
1378 |
} |
|
|
1379 |
if (isset($info['mpeg']['audio'])) { |
|
|
1380 |
unset($info['mpeg']['audio']); |
|
|
1381 |
} |
|
|
1382 |
if (empty($info['mpeg'])) { |
|
|
1383 |
unset($info['mpeg']); |
|
|
1384 |
} |
|
|
1385 |
return false; |
|
|
1386 |
|
|
|
1387 |
} elseif (feof($this->getid3->fp)) { |
|
|
1388 |
|
|
|
1389 |
$info['error'][] = 'Could not find valid MPEG audio synch before end of file'; |
|
|
1390 |
if (isset($info['audio']['bitrate'])) { |
|
|
1391 |
unset($info['audio']['bitrate']); |
|
|
1392 |
} |
|
|
1393 |
if (isset($info['mpeg']['audio'])) { |
|
|
1394 |
unset($info['mpeg']['audio']); |
|
|
1395 |
} |
|
|
1396 |
if (isset($info['mpeg']) && (!is_array($info['mpeg']) || (count($info['mpeg']) == 0))) { |
|
|
1397 |
unset($info['mpeg']); |
|
|
1398 |
} |
|
|
1399 |
return false; |
|
|
1400 |
} |
|
|
1401 |
} |
|
|
1402 |
|
|
|
1403 |
if (($SynchSeekOffset + 1) >= strlen($header)) { |
|
|
1404 |
$info['error'][] = 'Could not find valid MPEG synch before end of file'; |
|
|
1405 |
return false; |
|
|
1406 |
} |
|
|
1407 |
|
|
|
1408 |
if (($header{$SynchSeekOffset} == "\xFF") && ($header{($SynchSeekOffset + 1)} > "\xE0")) { // synch detected |
|
|
1409 |
if (!isset($FirstFrameThisfileInfo) && !isset($info['mpeg']['audio'])) { |
|
|
1410 |
$FirstFrameThisfileInfo = $info; |
|
|
1411 |
$FirstFrameAVDataOffset = $avdataoffset + $SynchSeekOffset; |
|
|
1412 |
if (!$this->decodeMPEGaudioHeader($FirstFrameAVDataOffset, $FirstFrameThisfileInfo, false)) { |
|
|
1413 |
// if this is the first valid MPEG-audio frame, save it in case it's a VBR header frame and there's |
|
|
1414 |
// garbage between this frame and a valid sequence of MPEG-audio frames, to be restored below |
|
|
1415 |
unset($FirstFrameThisfileInfo); |
|
|
1416 |
} |
|
|
1417 |
} |
|
|
1418 |
|
|
|
1419 |
$dummy = $info; // only overwrite real data if valid header found |
|
|
1420 |
if ($this->decodeMPEGaudioHeader($avdataoffset + $SynchSeekOffset, $dummy, true)) { |
|
|
1421 |
$info = $dummy; |
|
|
1422 |
$info['avdataoffset'] = $avdataoffset + $SynchSeekOffset; |
|
|
1423 |
switch (isset($info['fileformat']) ? $info['fileformat'] : '') { |
|
|
1424 |
case '': |
|
|
1425 |
case 'id3': |
|
|
1426 |
case 'ape': |
|
|
1427 |
case 'mp3': |
|
|
1428 |
$info['fileformat'] = 'mp3'; |
|
|
1429 |
$info['audio']['dataformat'] = 'mp3'; |
|
|
1430 |
break; |
|
|
1431 |
} |
|
|
1432 |
if (isset($FirstFrameThisfileInfo['mpeg']['audio']['bitrate_mode']) && ($FirstFrameThisfileInfo['mpeg']['audio']['bitrate_mode'] == 'vbr')) { |
|
|
1433 |
if (!(abs($info['audio']['bitrate'] - $FirstFrameThisfileInfo['audio']['bitrate']) <= 1)) { |
|
|
1434 |
// If there is garbage data between a valid VBR header frame and a sequence |
|
|
1435 |
// of valid MPEG-audio frames the VBR data is no longer discarded. |
|
|
1436 |
$info = $FirstFrameThisfileInfo; |
|
|
1437 |
$info['avdataoffset'] = $FirstFrameAVDataOffset; |
|
|
1438 |
$info['fileformat'] = 'mp3'; |
|
|
1439 |
$info['audio']['dataformat'] = 'mp3'; |
|
|
1440 |
$dummy = $info; |
|
|
1441 |
unset($dummy['mpeg']['audio']); |
|
|
1442 |
$GarbageOffsetStart = $FirstFrameAVDataOffset + $FirstFrameThisfileInfo['mpeg']['audio']['framelength']; |
|
|
1443 |
$GarbageOffsetEnd = $avdataoffset + $SynchSeekOffset; |
|
|
1444 |
if ($this->decodeMPEGaudioHeader($GarbageOffsetEnd, $dummy, true, true)) { |
|
|
1445 |
$info = $dummy; |
|
|
1446 |
$info['avdataoffset'] = $GarbageOffsetEnd; |
|
|
1447 |
$info['warning'][] = 'apparently-valid VBR header not used because could not find '.GETID3_MP3_VALID_CHECK_FRAMES.' consecutive MPEG-audio frames immediately after VBR header (garbage data for '.($GarbageOffsetEnd - $GarbageOffsetStart).' bytes between '.$GarbageOffsetStart.' and '.$GarbageOffsetEnd.'), but did find valid CBR stream starting at '.$GarbageOffsetEnd; |
|
|
1448 |
} else { |
|
|
1449 |
$info['warning'][] = 'using data from VBR header even though could not find '.GETID3_MP3_VALID_CHECK_FRAMES.' consecutive MPEG-audio frames immediately after VBR header (garbage data for '.($GarbageOffsetEnd - $GarbageOffsetStart).' bytes between '.$GarbageOffsetStart.' and '.$GarbageOffsetEnd.')'; |
|
|
1450 |
} |
|
|
1451 |
} |
|
|
1452 |
} |
|
|
1453 |
if (isset($info['mpeg']['audio']['bitrate_mode']) && ($info['mpeg']['audio']['bitrate_mode'] == 'vbr') && !isset($info['mpeg']['audio']['VBR_method'])) { |
|
|
1454 |
// VBR file with no VBR header |
|
|
1455 |
$BitrateHistogram = true; |
|
|
1456 |
} |
|
|
1457 |
|
|
|
1458 |
if ($BitrateHistogram) { |
|
|
1459 |
|
|
|
1460 |
$info['mpeg']['audio']['stereo_distribution'] = array('stereo'=>0, 'joint stereo'=>0, 'dual channel'=>0, 'mono'=>0); |
|
|
1461 |
$info['mpeg']['audio']['version_distribution'] = array('1'=>0, '2'=>0, '2.5'=>0); |
|
|
1462 |
|
|
|
1463 |
if ($info['mpeg']['audio']['version'] == '1') { |
|
|
1464 |
if ($info['mpeg']['audio']['layer'] == 3) { |
|
|
1465 |
$info['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 32000=>0, 40000=>0, 48000=>0, 56000=>0, 64000=>0, 80000=>0, 96000=>0, 112000=>0, 128000=>0, 160000=>0, 192000=>0, 224000=>0, 256000=>0, 320000=>0); |
|
|
1466 |
} elseif ($info['mpeg']['audio']['layer'] == 2) { |
|
|
1467 |
$info['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 32000=>0, 48000=>0, 56000=>0, 64000=>0, 80000=>0, 96000=>0, 112000=>0, 128000=>0, 160000=>0, 192000=>0, 224000=>0, 256000=>0, 320000=>0, 384000=>0); |
|
|
1468 |
} elseif ($info['mpeg']['audio']['layer'] == 1) { |
|
|
1469 |
$info['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 32000=>0, 64000=>0, 96000=>0, 128000=>0, 160000=>0, 192000=>0, 224000=>0, 256000=>0, 288000=>0, 320000=>0, 352000=>0, 384000=>0, 416000=>0, 448000=>0); |
|
|
1470 |
} |
|
|
1471 |
} elseif ($info['mpeg']['audio']['layer'] == 1) { |
|
|
1472 |
$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); |
|
|
1473 |
} else { |
|
|
1474 |
$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); |
|
|
1475 |
} |
|
|
1476 |
|
|
|
1477 |
$dummy = array('error'=>$info['error'], 'warning'=>$info['warning'], 'avdataend'=>$info['avdataend'], 'avdataoffset'=>$info['avdataoffset']); |
|
|
1478 |
$synchstartoffset = $info['avdataoffset']; |
|
5
|
1479 |
$this->fseek($info['avdataoffset']); |
|
0
|
1480 |
|
|
|
1481 |
// you can play with these numbers: |
|
|
1482 |
$max_frames_scan = 50000; |
|
|
1483 |
$max_scan_segments = 10; |
|
|
1484 |
|
|
|
1485 |
// don't play with these numbers: |
|
|
1486 |
$FastMode = false; |
|
|
1487 |
$SynchErrorsFound = 0; |
|
|
1488 |
$frames_scanned = 0; |
|
|
1489 |
$this_scan_segment = 0; |
|
|
1490 |
$frames_scan_per_segment = ceil($max_frames_scan / $max_scan_segments); |
|
|
1491 |
$pct_data_scanned = 0; |
|
|
1492 |
for ($current_segment = 0; $current_segment < $max_scan_segments; $current_segment++) { |
|
|
1493 |
$frames_scanned_this_segment = 0; |
|
5
|
1494 |
if ($this->ftell() >= $info['avdataend']) { |
|
0
|
1495 |
break; |
|
|
1496 |
} |
|
5
|
1497 |
$scan_start_offset[$current_segment] = max($this->ftell(), $info['avdataoffset'] + round($current_segment * (($info['avdataend'] - $info['avdataoffset']) / $max_scan_segments))); |
|
0
|
1498 |
if ($current_segment > 0) { |
|
5
|
1499 |
$this->fseek($scan_start_offset[$current_segment]); |
|
|
1500 |
$buffer_4k = $this->fread(4096); |
|
0
|
1501 |
for ($j = 0; $j < (strlen($buffer_4k) - 4); $j++) { |
|
|
1502 |
if (($buffer_4k{$j} == "\xFF") && ($buffer_4k{($j + 1)} > "\xE0")) { // synch detected |
|
|
1503 |
if ($this->decodeMPEGaudioHeader($scan_start_offset[$current_segment] + $j, $dummy, false, false, $FastMode)) { |
|
|
1504 |
$calculated_next_offset = $scan_start_offset[$current_segment] + $j + $dummy['mpeg']['audio']['framelength']; |
|
|
1505 |
if ($this->decodeMPEGaudioHeader($calculated_next_offset, $dummy, false, false, $FastMode)) { |
|
|
1506 |
$scan_start_offset[$current_segment] += $j; |
|
|
1507 |
break; |
|
|
1508 |
} |
|
|
1509 |
} |
|
|
1510 |
} |
|
|
1511 |
} |
|
|
1512 |
} |
|
|
1513 |
$synchstartoffset = $scan_start_offset[$current_segment]; |
|
|
1514 |
while ($this->decodeMPEGaudioHeader($synchstartoffset, $dummy, false, false, $FastMode)) { |
|
|
1515 |
$FastMode = true; |
|
|
1516 |
$thisframebitrate = $MPEGaudioBitrateLookup[$MPEGaudioVersionLookup[$dummy['mpeg']['audio']['raw']['version']]][$MPEGaudioLayerLookup[$dummy['mpeg']['audio']['raw']['layer']]][$dummy['mpeg']['audio']['raw']['bitrate']]; |
|
|
1517 |
|
|
|
1518 |
if (empty($dummy['mpeg']['audio']['framelength'])) { |
|
|
1519 |
$SynchErrorsFound++; |
|
|
1520 |
$synchstartoffset++; |
|
|
1521 |
} else { |
|
|
1522 |
getid3_lib::safe_inc($info['mpeg']['audio']['bitrate_distribution'][$thisframebitrate]); |
|
|
1523 |
getid3_lib::safe_inc($info['mpeg']['audio']['stereo_distribution'][$dummy['mpeg']['audio']['channelmode']]); |
|
|
1524 |
getid3_lib::safe_inc($info['mpeg']['audio']['version_distribution'][$dummy['mpeg']['audio']['version']]); |
|
|
1525 |
$synchstartoffset += $dummy['mpeg']['audio']['framelength']; |
|
|
1526 |
} |
|
|
1527 |
$frames_scanned++; |
|
|
1528 |
if ($frames_scan_per_segment && (++$frames_scanned_this_segment >= $frames_scan_per_segment)) { |
|
5
|
1529 |
$this_pct_scanned = ($this->ftell() - $scan_start_offset[$current_segment]) / ($info['avdataend'] - $info['avdataoffset']); |
|
0
|
1530 |
if (($current_segment == 0) && (($this_pct_scanned * $max_scan_segments) >= 1)) { |
|
|
1531 |
// file likely contains < $max_frames_scan, just scan as one segment |
|
|
1532 |
$max_scan_segments = 1; |
|
|
1533 |
$frames_scan_per_segment = $max_frames_scan; |
|
|
1534 |
} else { |
|
|
1535 |
$pct_data_scanned += $this_pct_scanned; |
|
|
1536 |
break; |
|
|
1537 |
} |
|
|
1538 |
} |
|
|
1539 |
} |
|
|
1540 |
} |
|
|
1541 |
if ($pct_data_scanned > 0) { |
|
|
1542 |
$info['warning'][] = 'too many MPEG audio frames to scan, only scanned '.$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.'; |
|
|
1543 |
foreach ($info['mpeg']['audio'] as $key1 => $value1) { |
|
|
1544 |
if (!preg_match('#_distribution$#i', $key1)) { |
|
|
1545 |
continue; |
|
|
1546 |
} |
|
|
1547 |
foreach ($value1 as $key2 => $value2) { |
|
|
1548 |
$info['mpeg']['audio'][$key1][$key2] = round($value2 / $pct_data_scanned); |
|
|
1549 |
} |
|
|
1550 |
} |
|
|
1551 |
} |
|
|
1552 |
|
|
|
1553 |
if ($SynchErrorsFound > 0) { |
|
|
1554 |
$info['warning'][] = 'Found '.$SynchErrorsFound.' synch errors in histogram analysis'; |
|
|
1555 |
//return false; |
|
|
1556 |
} |
|
|
1557 |
|
|
|
1558 |
$bittotal = 0; |
|
|
1559 |
$framecounter = 0; |
|
|
1560 |
foreach ($info['mpeg']['audio']['bitrate_distribution'] as $bitratevalue => $bitratecount) { |
|
|
1561 |
$framecounter += $bitratecount; |
|
|
1562 |
if ($bitratevalue != 'free') { |
|
|
1563 |
$bittotal += ($bitratevalue * $bitratecount); |
|
|
1564 |
} |
|
|
1565 |
} |
|
|
1566 |
if ($framecounter == 0) { |
|
|
1567 |
$info['error'][] = 'Corrupt MP3 file: framecounter == zero'; |
|
|
1568 |
return false; |
|
|
1569 |
} |
|
|
1570 |
$info['mpeg']['audio']['frame_count'] = getid3_lib::CastAsInt($framecounter); |
|
|
1571 |
$info['mpeg']['audio']['bitrate'] = ($bittotal / $framecounter); |
|
|
1572 |
|
|
|
1573 |
$info['audio']['bitrate'] = $info['mpeg']['audio']['bitrate']; |
|
|
1574 |
|
|
|
1575 |
|
|
|
1576 |
// Definitively set VBR vs CBR, even if the Xing/LAME/VBRI header says differently |
|
|
1577 |
$distinct_bitrates = 0; |
|
|
1578 |
foreach ($info['mpeg']['audio']['bitrate_distribution'] as $bitrate_value => $bitrate_count) { |
|
|
1579 |
if ($bitrate_count > 0) { |
|
|
1580 |
$distinct_bitrates++; |
|
|
1581 |
} |
|
|
1582 |
} |
|
|
1583 |
if ($distinct_bitrates > 1) { |
|
|
1584 |
$info['mpeg']['audio']['bitrate_mode'] = 'vbr'; |
|
|
1585 |
} else { |
|
|
1586 |
$info['mpeg']['audio']['bitrate_mode'] = 'cbr'; |
|
|
1587 |
} |
|
|
1588 |
$info['audio']['bitrate_mode'] = $info['mpeg']['audio']['bitrate_mode']; |
|
|
1589 |
|
|
|
1590 |
} |
|
|
1591 |
|
|
|
1592 |
break; // exit while() |
|
|
1593 |
} |
|
|
1594 |
} |
|
|
1595 |
|
|
|
1596 |
$SynchSeekOffset++; |
|
|
1597 |
if (($avdataoffset + $SynchSeekOffset) >= $info['avdataend']) { |
|
|
1598 |
// end of file/data |
|
|
1599 |
|
|
|
1600 |
if (empty($info['mpeg']['audio'])) { |
|
|
1601 |
|
|
|
1602 |
$info['error'][] = 'could not find valid MPEG synch before end of file'; |
|
|
1603 |
if (isset($info['audio']['bitrate'])) { |
|
|
1604 |
unset($info['audio']['bitrate']); |
|
|
1605 |
} |
|
|
1606 |
if (isset($info['mpeg']['audio'])) { |
|
|
1607 |
unset($info['mpeg']['audio']); |
|
|
1608 |
} |
|
|
1609 |
if (isset($info['mpeg']) && (!is_array($info['mpeg']) || empty($info['mpeg']))) { |
|
|
1610 |
unset($info['mpeg']); |
|
|
1611 |
} |
|
|
1612 |
return false; |
|
|
1613 |
|
|
|
1614 |
} |
|
|
1615 |
break; |
|
|
1616 |
} |
|
|
1617 |
|
|
|
1618 |
} |
|
|
1619 |
$info['audio']['channels'] = $info['mpeg']['audio']['channels']; |
|
|
1620 |
$info['audio']['channelmode'] = $info['mpeg']['audio']['channelmode']; |
|
|
1621 |
$info['audio']['sample_rate'] = $info['mpeg']['audio']['sample_rate']; |
|
|
1622 |
return true; |
|
|
1623 |
} |
|
|
1624 |
|
|
|
1625 |
|
|
|
1626 |
public static function MPEGaudioVersionArray() { |
|
|
1627 |
static $MPEGaudioVersion = array('2.5', false, '2', '1'); |
|
|
1628 |
return $MPEGaudioVersion; |
|
|
1629 |
} |
|
|
1630 |
|
|
|
1631 |
public static function MPEGaudioLayerArray() { |
|
|
1632 |
static $MPEGaudioLayer = array(false, 3, 2, 1); |
|
|
1633 |
return $MPEGaudioLayer; |
|
|
1634 |
} |
|
|
1635 |
|
|
|
1636 |
public static function MPEGaudioBitrateArray() { |
|
|
1637 |
static $MPEGaudioBitrate; |
|
|
1638 |
if (empty($MPEGaudioBitrate)) { |
|
|
1639 |
$MPEGaudioBitrate = array ( |
|
|
1640 |
'1' => array (1 => array('free', 32000, 64000, 96000, 128000, 160000, 192000, 224000, 256000, 288000, 320000, 352000, 384000, 416000, 448000), |
|
|
1641 |
2 => array('free', 32000, 48000, 56000, 64000, 80000, 96000, 112000, 128000, 160000, 192000, 224000, 256000, 320000, 384000), |
|
|
1642 |
3 => array('free', 32000, 40000, 48000, 56000, 64000, 80000, 96000, 112000, 128000, 160000, 192000, 224000, 256000, 320000) |
|
|
1643 |
), |
|
|
1644 |
|
|
|
1645 |
'2' => array (1 => array('free', 32000, 48000, 56000, 64000, 80000, 96000, 112000, 128000, 144000, 160000, 176000, 192000, 224000, 256000), |
|
|
1646 |
2 => array('free', 8000, 16000, 24000, 32000, 40000, 48000, 56000, 64000, 80000, 96000, 112000, 128000, 144000, 160000), |
|
|
1647 |
) |
|
|
1648 |
); |
|
|
1649 |
$MPEGaudioBitrate['2'][3] = $MPEGaudioBitrate['2'][2]; |
|
|
1650 |
$MPEGaudioBitrate['2.5'] = $MPEGaudioBitrate['2']; |
|
|
1651 |
} |
|
|
1652 |
return $MPEGaudioBitrate; |
|
|
1653 |
} |
|
|
1654 |
|
|
|
1655 |
public static function MPEGaudioFrequencyArray() { |
|
|
1656 |
static $MPEGaudioFrequency; |
|
|
1657 |
if (empty($MPEGaudioFrequency)) { |
|
|
1658 |
$MPEGaudioFrequency = array ( |
|
|
1659 |
'1' => array(44100, 48000, 32000), |
|
|
1660 |
'2' => array(22050, 24000, 16000), |
|
|
1661 |
'2.5' => array(11025, 12000, 8000) |
|
|
1662 |
); |
|
|
1663 |
} |
|
|
1664 |
return $MPEGaudioFrequency; |
|
|
1665 |
} |
|
|
1666 |
|
|
|
1667 |
public static function MPEGaudioChannelModeArray() { |
|
|
1668 |
static $MPEGaudioChannelMode = array('stereo', 'joint stereo', 'dual channel', 'mono'); |
|
|
1669 |
return $MPEGaudioChannelMode; |
|
|
1670 |
} |
|
|
1671 |
|
|
|
1672 |
public static function MPEGaudioModeExtensionArray() { |
|
|
1673 |
static $MPEGaudioModeExtension; |
|
|
1674 |
if (empty($MPEGaudioModeExtension)) { |
|
|
1675 |
$MPEGaudioModeExtension = array ( |
|
|
1676 |
1 => array('4-31', '8-31', '12-31', '16-31'), |
|
|
1677 |
2 => array('4-31', '8-31', '12-31', '16-31'), |
|
|
1678 |
3 => array('', 'IS', 'MS', 'IS+MS') |
|
|
1679 |
); |
|
|
1680 |
} |
|
|
1681 |
return $MPEGaudioModeExtension; |
|
|
1682 |
} |
|
|
1683 |
|
|
|
1684 |
public static function MPEGaudioEmphasisArray() { |
|
|
1685 |
static $MPEGaudioEmphasis = array('none', '50/15ms', false, 'CCIT J.17'); |
|
|
1686 |
return $MPEGaudioEmphasis; |
|
|
1687 |
} |
|
|
1688 |
|
|
|
1689 |
public static function MPEGaudioHeaderBytesValid($head4, $allowBitrate15=false) { |
|
|
1690 |
return self::MPEGaudioHeaderValid(self::MPEGaudioHeaderDecode($head4), false, $allowBitrate15); |
|
|
1691 |
} |
|
|
1692 |
|
|
|
1693 |
public static function MPEGaudioHeaderValid($rawarray, $echoerrors=false, $allowBitrate15=false) { |
|
|
1694 |
if (($rawarray['synch'] & 0x0FFE) != 0x0FFE) { |
|
|
1695 |
return false; |
|
|
1696 |
} |
|
|
1697 |
|
|
|
1698 |
static $MPEGaudioVersionLookup; |
|
|
1699 |
static $MPEGaudioLayerLookup; |
|
|
1700 |
static $MPEGaudioBitrateLookup; |
|
|
1701 |
static $MPEGaudioFrequencyLookup; |
|
|
1702 |
static $MPEGaudioChannelModeLookup; |
|
|
1703 |
static $MPEGaudioModeExtensionLookup; |
|
|
1704 |
static $MPEGaudioEmphasisLookup; |
|
|
1705 |
if (empty($MPEGaudioVersionLookup)) { |
|
|
1706 |
$MPEGaudioVersionLookup = self::MPEGaudioVersionArray(); |
|
|
1707 |
$MPEGaudioLayerLookup = self::MPEGaudioLayerArray(); |
|
|
1708 |
$MPEGaudioBitrateLookup = self::MPEGaudioBitrateArray(); |
|
|
1709 |
$MPEGaudioFrequencyLookup = self::MPEGaudioFrequencyArray(); |
|
|
1710 |
$MPEGaudioChannelModeLookup = self::MPEGaudioChannelModeArray(); |
|
|
1711 |
$MPEGaudioModeExtensionLookup = self::MPEGaudioModeExtensionArray(); |
|
|
1712 |
$MPEGaudioEmphasisLookup = self::MPEGaudioEmphasisArray(); |
|
|
1713 |
} |
|
|
1714 |
|
|
|
1715 |
if (isset($MPEGaudioVersionLookup[$rawarray['version']])) { |
|
|
1716 |
$decodedVersion = $MPEGaudioVersionLookup[$rawarray['version']]; |
|
|
1717 |
} else { |
|
|
1718 |
echo ($echoerrors ? "\n".'invalid Version ('.$rawarray['version'].')' : ''); |
|
|
1719 |
return false; |
|
|
1720 |
} |
|
|
1721 |
if (isset($MPEGaudioLayerLookup[$rawarray['layer']])) { |
|
|
1722 |
$decodedLayer = $MPEGaudioLayerLookup[$rawarray['layer']]; |
|
|
1723 |
} else { |
|
|
1724 |
echo ($echoerrors ? "\n".'invalid Layer ('.$rawarray['layer'].')' : ''); |
|
|
1725 |
return false; |
|
|
1726 |
} |
|
|
1727 |
if (!isset($MPEGaudioBitrateLookup[$decodedVersion][$decodedLayer][$rawarray['bitrate']])) { |
|
|
1728 |
echo ($echoerrors ? "\n".'invalid Bitrate ('.$rawarray['bitrate'].')' : ''); |
|
|
1729 |
if ($rawarray['bitrate'] == 15) { |
|
|
1730 |
// known issue in LAME 3.90 - 3.93.1 where free-format has bitrate ID of 15 instead of 0 |
|
|
1731 |
// let it go through here otherwise file will not be identified |
|
|
1732 |
if (!$allowBitrate15) { |
|
|
1733 |
return false; |
|
|
1734 |
} |
|
|
1735 |
} else { |
|
|
1736 |
return false; |
|
|
1737 |
} |
|
|
1738 |
} |
|
|
1739 |
if (!isset($MPEGaudioFrequencyLookup[$decodedVersion][$rawarray['sample_rate']])) { |
|
|
1740 |
echo ($echoerrors ? "\n".'invalid Frequency ('.$rawarray['sample_rate'].')' : ''); |
|
|
1741 |
return false; |
|
|
1742 |
} |
|
|
1743 |
if (!isset($MPEGaudioChannelModeLookup[$rawarray['channelmode']])) { |
|
|
1744 |
echo ($echoerrors ? "\n".'invalid ChannelMode ('.$rawarray['channelmode'].')' : ''); |
|
|
1745 |
return false; |
|
|
1746 |
} |
|
|
1747 |
if (!isset($MPEGaudioModeExtensionLookup[$decodedLayer][$rawarray['modeextension']])) { |
|
|
1748 |
echo ($echoerrors ? "\n".'invalid Mode Extension ('.$rawarray['modeextension'].')' : ''); |
|
|
1749 |
return false; |
|
|
1750 |
} |
|
|
1751 |
if (!isset($MPEGaudioEmphasisLookup[$rawarray['emphasis']])) { |
|
|
1752 |
echo ($echoerrors ? "\n".'invalid Emphasis ('.$rawarray['emphasis'].')' : ''); |
|
|
1753 |
return false; |
|
|
1754 |
} |
|
|
1755 |
// These are just either set or not set, you can't mess that up :) |
|
|
1756 |
// $rawarray['protection']; |
|
|
1757 |
// $rawarray['padding']; |
|
|
1758 |
// $rawarray['private']; |
|
|
1759 |
// $rawarray['copyright']; |
|
|
1760 |
// $rawarray['original']; |
|
|
1761 |
|
|
|
1762 |
return true; |
|
|
1763 |
} |
|
|
1764 |
|
|
|
1765 |
public static function MPEGaudioHeaderDecode($Header4Bytes) { |
|
|
1766 |
// AAAA AAAA AAAB BCCD EEEE FFGH IIJJ KLMM |
|
|
1767 |
// A - Frame sync (all bits set) |
|
|
1768 |
// B - MPEG Audio version ID |
|
|
1769 |
// C - Layer description |
|
|
1770 |
// D - Protection bit |
|
|
1771 |
// E - Bitrate index |
|
|
1772 |
// F - Sampling rate frequency index |
|
|
1773 |
// G - Padding bit |
|
|
1774 |
// H - Private bit |
|
|
1775 |
// I - Channel Mode |
|
|
1776 |
// J - Mode extension (Only if Joint stereo) |
|
|
1777 |
// K - Copyright |
|
|
1778 |
// L - Original |
|
|
1779 |
// M - Emphasis |
|
|
1780 |
|
|
|
1781 |
if (strlen($Header4Bytes) != 4) { |
|
|
1782 |
return false; |
|
|
1783 |
} |
|
|
1784 |
|
|
|
1785 |
$MPEGrawHeader['synch'] = (getid3_lib::BigEndian2Int(substr($Header4Bytes, 0, 2)) & 0xFFE0) >> 4; |
|
|
1786 |
$MPEGrawHeader['version'] = (ord($Header4Bytes{1}) & 0x18) >> 3; // BB |
|
|
1787 |
$MPEGrawHeader['layer'] = (ord($Header4Bytes{1}) & 0x06) >> 1; // CC |
|
|
1788 |
$MPEGrawHeader['protection'] = (ord($Header4Bytes{1}) & 0x01); // D |
|
|
1789 |
$MPEGrawHeader['bitrate'] = (ord($Header4Bytes{2}) & 0xF0) >> 4; // EEEE |
|
|
1790 |
$MPEGrawHeader['sample_rate'] = (ord($Header4Bytes{2}) & 0x0C) >> 2; // FF |
|
|
1791 |
$MPEGrawHeader['padding'] = (ord($Header4Bytes{2}) & 0x02) >> 1; // G |
|
|
1792 |
$MPEGrawHeader['private'] = (ord($Header4Bytes{2}) & 0x01); // H |
|
|
1793 |
$MPEGrawHeader['channelmode'] = (ord($Header4Bytes{3}) & 0xC0) >> 6; // II |
|
|
1794 |
$MPEGrawHeader['modeextension'] = (ord($Header4Bytes{3}) & 0x30) >> 4; // JJ |
|
|
1795 |
$MPEGrawHeader['copyright'] = (ord($Header4Bytes{3}) & 0x08) >> 3; // K |
|
|
1796 |
$MPEGrawHeader['original'] = (ord($Header4Bytes{3}) & 0x04) >> 2; // L |
|
|
1797 |
$MPEGrawHeader['emphasis'] = (ord($Header4Bytes{3}) & 0x03); // MM |
|
|
1798 |
|
|
|
1799 |
return $MPEGrawHeader; |
|
|
1800 |
} |
|
|
1801 |
|
|
|
1802 |
public static function MPEGaudioFrameLength(&$bitrate, &$version, &$layer, $padding, &$samplerate) { |
|
|
1803 |
static $AudioFrameLengthCache = array(); |
|
|
1804 |
|
|
|
1805 |
if (!isset($AudioFrameLengthCache[$bitrate][$version][$layer][$padding][$samplerate])) { |
|
|
1806 |
$AudioFrameLengthCache[$bitrate][$version][$layer][$padding][$samplerate] = false; |
|
|
1807 |
if ($bitrate != 'free') { |
|
|
1808 |
|
|
|
1809 |
if ($version == '1') { |
|
|
1810 |
|
|
|
1811 |
if ($layer == '1') { |
|
|
1812 |
|
|
|
1813 |
// For Layer I slot is 32 bits long |
|
|
1814 |
$FrameLengthCoefficient = 48; |
|
|
1815 |
$SlotLength = 4; |
|
|
1816 |
|
|
|
1817 |
} else { // Layer 2 / 3 |
|
|
1818 |
|
|
|
1819 |
// for Layer 2 and Layer 3 slot is 8 bits long. |
|
|
1820 |
$FrameLengthCoefficient = 144; |
|
|
1821 |
$SlotLength = 1; |
|
|
1822 |
|
|
|
1823 |
} |
|
|
1824 |
|
|
|
1825 |
} else { // MPEG-2 / MPEG-2.5 |
|
|
1826 |
|
|
|
1827 |
if ($layer == '1') { |
|
|
1828 |
|
|
|
1829 |
// For Layer I slot is 32 bits long |
|
|
1830 |
$FrameLengthCoefficient = 24; |
|
|
1831 |
$SlotLength = 4; |
|
|
1832 |
|
|
|
1833 |
} elseif ($layer == '2') { |
|
|
1834 |
|
|
|
1835 |
// for Layer 2 and Layer 3 slot is 8 bits long. |
|
|
1836 |
$FrameLengthCoefficient = 144; |
|
|
1837 |
$SlotLength = 1; |
|
|
1838 |
|
|
|
1839 |
} else { // layer 3 |
|
|
1840 |
|
|
|
1841 |
// for Layer 2 and Layer 3 slot is 8 bits long. |
|
|
1842 |
$FrameLengthCoefficient = 72; |
|
|
1843 |
$SlotLength = 1; |
|
|
1844 |
|
|
|
1845 |
} |
|
|
1846 |
|
|
|
1847 |
} |
|
|
1848 |
|
|
|
1849 |
// FrameLengthInBytes = ((Coefficient * BitRate) / SampleRate) + Padding |
|
|
1850 |
if ($samplerate > 0) { |
|
|
1851 |
$NewFramelength = ($FrameLengthCoefficient * $bitrate) / $samplerate; |
|
|
1852 |
$NewFramelength = floor($NewFramelength / $SlotLength) * $SlotLength; // round to next-lower multiple of SlotLength (1 byte for Layer 2/3, 4 bytes for Layer I) |
|
|
1853 |
if ($padding) { |
|
|
1854 |
$NewFramelength += $SlotLength; |
|
|
1855 |
} |
|
|
1856 |
$AudioFrameLengthCache[$bitrate][$version][$layer][$padding][$samplerate] = (int) $NewFramelength; |
|
|
1857 |
} |
|
|
1858 |
} |
|
|
1859 |
} |
|
|
1860 |
return $AudioFrameLengthCache[$bitrate][$version][$layer][$padding][$samplerate]; |
|
|
1861 |
} |
|
|
1862 |
|
|
|
1863 |
public static function ClosestStandardMP3Bitrate($bit_rate) { |
|
|
1864 |
static $standard_bit_rates = array (320000, 256000, 224000, 192000, 160000, 128000, 112000, 96000, 80000, 64000, 56000, 48000, 40000, 32000, 24000, 16000, 8000); |
|
|
1865 |
static $bit_rate_table = array (0=>'-'); |
|
|
1866 |
$round_bit_rate = intval(round($bit_rate, -3)); |
|
|
1867 |
if (!isset($bit_rate_table[$round_bit_rate])) { |
|
|
1868 |
if ($round_bit_rate > max($standard_bit_rates)) { |
|
|
1869 |
$bit_rate_table[$round_bit_rate] = round($bit_rate, 2 - strlen($bit_rate)); |
|
|
1870 |
} else { |
|
|
1871 |
$bit_rate_table[$round_bit_rate] = max($standard_bit_rates); |
|
|
1872 |
foreach ($standard_bit_rates as $standard_bit_rate) { |
|
|
1873 |
if ($round_bit_rate >= $standard_bit_rate + (($bit_rate_table[$round_bit_rate] - $standard_bit_rate) / 2)) { |
|
|
1874 |
break; |
|
|
1875 |
} |
|
|
1876 |
$bit_rate_table[$round_bit_rate] = $standard_bit_rate; |
|
|
1877 |
} |
|
|
1878 |
} |
|
|
1879 |
} |
|
|
1880 |
return $bit_rate_table[$round_bit_rate]; |
|
|
1881 |
} |
|
|
1882 |
|
|
|
1883 |
public static function XingVBRidOffset($version, $channelmode) { |
|
|
1884 |
static $XingVBRidOffsetCache = array(); |
|
|
1885 |
if (empty($XingVBRidOffset)) { |
|
|
1886 |
$XingVBRidOffset = array ( |
|
|
1887 |
'1' => array ('mono' => 0x15, // 4 + 17 = 21 |
|
|
1888 |
'stereo' => 0x24, // 4 + 32 = 36 |
|
|
1889 |
'joint stereo' => 0x24, |
|
|
1890 |
'dual channel' => 0x24 |
|
|
1891 |
), |
|
|
1892 |
|
|
|
1893 |
'2' => array ('mono' => 0x0D, // 4 + 9 = 13 |
|
|
1894 |
'stereo' => 0x15, // 4 + 17 = 21 |
|
|
1895 |
'joint stereo' => 0x15, |
|
|
1896 |
'dual channel' => 0x15 |
|
|
1897 |
), |
|
|
1898 |
|
|
|
1899 |
'2.5' => array ('mono' => 0x15, |
|
|
1900 |
'stereo' => 0x15, |
|
|
1901 |
'joint stereo' => 0x15, |
|
|
1902 |
'dual channel' => 0x15 |
|
|
1903 |
) |
|
|
1904 |
); |
|
|
1905 |
} |
|
|
1906 |
return $XingVBRidOffset[$version][$channelmode]; |
|
|
1907 |
} |
|
|
1908 |
|
|
|
1909 |
public static function LAMEvbrMethodLookup($VBRmethodID) { |
|
|
1910 |
static $LAMEvbrMethodLookup = array( |
|
|
1911 |
0x00 => 'unknown', |
|
|
1912 |
0x01 => 'cbr', |
|
|
1913 |
0x02 => 'abr', |
|
|
1914 |
0x03 => 'vbr-old / vbr-rh', |
|
|
1915 |
0x04 => 'vbr-new / vbr-mtrh', |
|
|
1916 |
0x05 => 'vbr-mt', |
|
|
1917 |
0x06 => 'vbr (full vbr method 4)', |
|
|
1918 |
0x08 => 'cbr (constant bitrate 2 pass)', |
|
|
1919 |
0x09 => 'abr (2 pass)', |
|
|
1920 |
0x0F => 'reserved' |
|
|
1921 |
); |
|
|
1922 |
return (isset($LAMEvbrMethodLookup[$VBRmethodID]) ? $LAMEvbrMethodLookup[$VBRmethodID] : ''); |
|
|
1923 |
} |
|
|
1924 |
|
|
|
1925 |
public static function LAMEmiscStereoModeLookup($StereoModeID) { |
|
|
1926 |
static $LAMEmiscStereoModeLookup = array( |
|
|
1927 |
0 => 'mono', |
|
|
1928 |
1 => 'stereo', |
|
|
1929 |
2 => 'dual mono', |
|
|
1930 |
3 => 'joint stereo', |
|
|
1931 |
4 => 'forced stereo', |
|
|
1932 |
5 => 'auto', |
|
|
1933 |
6 => 'intensity stereo', |
|
|
1934 |
7 => 'other' |
|
|
1935 |
); |
|
|
1936 |
return (isset($LAMEmiscStereoModeLookup[$StereoModeID]) ? $LAMEmiscStereoModeLookup[$StereoModeID] : ''); |
|
|
1937 |
} |
|
|
1938 |
|
|
|
1939 |
public static function LAMEmiscSourceSampleFrequencyLookup($SourceSampleFrequencyID) { |
|
|
1940 |
static $LAMEmiscSourceSampleFrequencyLookup = array( |
|
|
1941 |
0 => '<= 32 kHz', |
|
|
1942 |
1 => '44.1 kHz', |
|
|
1943 |
2 => '48 kHz', |
|
|
1944 |
3 => '> 48kHz' |
|
|
1945 |
); |
|
|
1946 |
return (isset($LAMEmiscSourceSampleFrequencyLookup[$SourceSampleFrequencyID]) ? $LAMEmiscSourceSampleFrequencyLookup[$SourceSampleFrequencyID] : ''); |
|
|
1947 |
} |
|
|
1948 |
|
|
|
1949 |
public static function LAMEsurroundInfoLookup($SurroundInfoID) { |
|
|
1950 |
static $LAMEsurroundInfoLookup = array( |
|
|
1951 |
0 => 'no surround info', |
|
|
1952 |
1 => 'DPL encoding', |
|
|
1953 |
2 => 'DPL2 encoding', |
|
|
1954 |
3 => 'Ambisonic encoding' |
|
|
1955 |
); |
|
|
1956 |
return (isset($LAMEsurroundInfoLookup[$SurroundInfoID]) ? $LAMEsurroundInfoLookup[$SurroundInfoID] : 'reserved'); |
|
|
1957 |
} |
|
|
1958 |
|
|
|
1959 |
public static function LAMEpresetUsedLookup($LAMEtag) { |
|
|
1960 |
|
|
|
1961 |
if ($LAMEtag['preset_used_id'] == 0) { |
|
|
1962 |
// no preset used (LAME >=3.93) |
|
|
1963 |
// no preset recorded (LAME <3.93) |
|
|
1964 |
return ''; |
|
|
1965 |
} |
|
|
1966 |
$LAMEpresetUsedLookup = array(); |
|
|
1967 |
|
|
|
1968 |
///// THIS PART CANNOT BE STATIC . |
|
|
1969 |
for ($i = 8; $i <= 320; $i++) { |
|
|
1970 |
switch ($LAMEtag['vbr_method']) { |
|
|
1971 |
case 'cbr': |
|
|
1972 |
$LAMEpresetUsedLookup[$i] = '--alt-preset '.$LAMEtag['vbr_method'].' '.$i; |
|
|
1973 |
break; |
|
|
1974 |
case 'abr': |
|
|
1975 |
default: // other VBR modes shouldn't be here(?) |
|
|
1976 |
$LAMEpresetUsedLookup[$i] = '--alt-preset '.$i; |
|
|
1977 |
break; |
|
|
1978 |
} |
|
|
1979 |
} |
|
|
1980 |
|
|
|
1981 |
// named old-style presets (studio, phone, voice, etc) are handled in GuessEncoderOptions() |
|
|
1982 |
|
|
|
1983 |
// named alt-presets |
|
|
1984 |
$LAMEpresetUsedLookup[1000] = '--r3mix'; |
|
|
1985 |
$LAMEpresetUsedLookup[1001] = '--alt-preset standard'; |
|
|
1986 |
$LAMEpresetUsedLookup[1002] = '--alt-preset extreme'; |
|
|
1987 |
$LAMEpresetUsedLookup[1003] = '--alt-preset insane'; |
|
|
1988 |
$LAMEpresetUsedLookup[1004] = '--alt-preset fast standard'; |
|
|
1989 |
$LAMEpresetUsedLookup[1005] = '--alt-preset fast extreme'; |
|
|
1990 |
$LAMEpresetUsedLookup[1006] = '--alt-preset medium'; |
|
|
1991 |
$LAMEpresetUsedLookup[1007] = '--alt-preset fast medium'; |
|
|
1992 |
|
|
|
1993 |
// LAME 3.94 additions/changes |
|
|
1994 |
$LAMEpresetUsedLookup[1010] = '--preset portable'; // 3.94a15 Oct 21 2003 |
|
|
1995 |
$LAMEpresetUsedLookup[1015] = '--preset radio'; // 3.94a15 Oct 21 2003 |
|
|
1996 |
|
|
|
1997 |
$LAMEpresetUsedLookup[320] = '--preset insane'; // 3.94a15 Nov 12 2003 |
|
|
1998 |
$LAMEpresetUsedLookup[410] = '-V9'; |
|
|
1999 |
$LAMEpresetUsedLookup[420] = '-V8'; |
|
|
2000 |
$LAMEpresetUsedLookup[440] = '-V6'; |
|
|
2001 |
$LAMEpresetUsedLookup[430] = '--preset radio'; // 3.94a15 Nov 12 2003 |
|
|
2002 |
$LAMEpresetUsedLookup[450] = '--preset '.(($LAMEtag['raw']['vbr_method'] == 4) ? 'fast ' : '').'portable'; // 3.94a15 Nov 12 2003 |
|
|
2003 |
$LAMEpresetUsedLookup[460] = '--preset '.(($LAMEtag['raw']['vbr_method'] == 4) ? 'fast ' : '').'medium'; // 3.94a15 Nov 12 2003 |
|
|
2004 |
$LAMEpresetUsedLookup[470] = '--r3mix'; // 3.94b1 Dec 18 2003 |
|
|
2005 |
$LAMEpresetUsedLookup[480] = '--preset '.(($LAMEtag['raw']['vbr_method'] == 4) ? 'fast ' : '').'standard'; // 3.94a15 Nov 12 2003 |
|
|
2006 |
$LAMEpresetUsedLookup[490] = '-V1'; |
|
|
2007 |
$LAMEpresetUsedLookup[500] = '--preset '.(($LAMEtag['raw']['vbr_method'] == 4) ? 'fast ' : '').'extreme'; // 3.94a15 Nov 12 2003 |
|
|
2008 |
|
|
|
2009 |
return (isset($LAMEpresetUsedLookup[$LAMEtag['preset_used_id']]) ? $LAMEpresetUsedLookup[$LAMEtag['preset_used_id']] : 'new/unknown preset: '.$LAMEtag['preset_used_id'].' - report to info@getid3.org'); |
|
|
2010 |
} |
|
|
2011 |
|
|
5
|
2012 |
} |