/Vendor/getid3/module.audio.mp3.php
PHP | 2012 lines | 1432 code | 283 blank | 297 comment | 398 complexity | eb87257b2f0507f4ac5591d4226dfc86 MD5 | raw file
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- <?php
- /////////////////////////////////////////////////////////////////
- /// getID3() by James Heinrich <info@getid3.org> //
- // available at http://getid3.sourceforge.net //
- // or http://www.getid3.org //
- // also https://github.com/JamesHeinrich/getID3 //
- /////////////////////////////////////////////////////////////////
- // See readme.txt for more details //
- /////////////////////////////////////////////////////////////////
- // //
- // module.audio.mp3.php //
- // module for analyzing MP3 files //
- // dependencies: NONE //
- // ///
- /////////////////////////////////////////////////////////////////
- // number of frames to scan to determine if MPEG-audio sequence is valid
- // Lower this number to 5-20 for faster scanning
- // Increase this number to 50+ for most accurate detection of valid VBR/CBR
- // mpeg-audio streams
- define('GETID3_MP3_VALID_CHECK_FRAMES', 35);
- class getid3_mp3 extends getid3_handler
- {
- 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
- public function Analyze() {
- $info = &$this->getid3->info;
- $initialOffset = $info['avdataoffset'];
- if (!$this->getOnlyMPEGaudioInfo($info['avdataoffset'])) {
- if ($this->allow_bruteforce) {
- $info['error'][] = 'Rescanning file in BruteForce mode';
- $this->getOnlyMPEGaudioInfoBruteForce($this->getid3->fp, $info);
- }
- }
- if (isset($info['mpeg']['audio']['bitrate_mode'])) {
- $info['audio']['bitrate_mode'] = strtolower($info['mpeg']['audio']['bitrate_mode']);
- }
- if (((isset($info['id3v2']['headerlength']) && ($info['avdataoffset'] > $info['id3v2']['headerlength'])) || (!isset($info['id3v2']) && ($info['avdataoffset'] > 0) && ($info['avdataoffset'] != $initialOffset)))) {
- $synchoffsetwarning = 'Unknown data before synch ';
- if (isset($info['id3v2']['headerlength'])) {
- $synchoffsetwarning .= '(ID3v2 header ends at '.$info['id3v2']['headerlength'].', then '.($info['avdataoffset'] - $info['id3v2']['headerlength']).' bytes garbage, ';
- } elseif ($initialOffset > 0) {
- $synchoffsetwarning .= '(should be at '.$initialOffset.', ';
- } else {
- $synchoffsetwarning .= '(should be at beginning of file, ';
- }
- $synchoffsetwarning .= 'synch detected at '.$info['avdataoffset'].')';
- if (isset($info['audio']['bitrate_mode']) && ($info['audio']['bitrate_mode'] == 'cbr')) {
- if (!empty($info['id3v2']['headerlength']) && (($info['avdataoffset'] - $info['id3v2']['headerlength']) == $info['mpeg']['audio']['framelength'])) {
- $synchoffsetwarning .= '. This is a known problem with some versions of LAME (3.90-3.92) DLL in CBR mode.';
- $info['audio']['codec'] = 'LAME';
- $CurrentDataLAMEversionString = 'LAME3.';
- } elseif (empty($info['id3v2']['headerlength']) && ($info['avdataoffset'] == $info['mpeg']['audio']['framelength'])) {
- $synchoffsetwarning .= '. This is a known problem with some versions of LAME (3.90 - 3.92) DLL in CBR mode.';
- $info['audio']['codec'] = 'LAME';
- $CurrentDataLAMEversionString = 'LAME3.';
- }
- }
- $info['warning'][] = $synchoffsetwarning;
- }
- if (isset($info['mpeg']['audio']['LAME'])) {
- $info['audio']['codec'] = 'LAME';
- if (!empty($info['mpeg']['audio']['LAME']['long_version'])) {
- $info['audio']['encoder'] = rtrim($info['mpeg']['audio']['LAME']['long_version'], "\x00");
- } elseif (!empty($info['mpeg']['audio']['LAME']['short_version'])) {
- $info['audio']['encoder'] = rtrim($info['mpeg']['audio']['LAME']['short_version'], "\x00");
- }
- }
- $CurrentDataLAMEversionString = (!empty($CurrentDataLAMEversionString) ? $CurrentDataLAMEversionString : (isset($info['audio']['encoder']) ? $info['audio']['encoder'] : ''));
- if (!empty($CurrentDataLAMEversionString) && (substr($CurrentDataLAMEversionString, 0, 6) == 'LAME3.') && !preg_match('[0-9\)]', substr($CurrentDataLAMEversionString, -1))) {
- // a version number of LAME that does not end with a number like "LAME3.92"
- // or with a closing parenthesis like "LAME3.88 (alpha)"
- // or a version of LAME with the LAMEtag-not-filled-in-DLL-mode bug (3.90-3.92)
- // not sure what the actual last frame length will be, but will be less than or equal to 1441
- $PossiblyLongerLAMEversion_FrameLength = 1441;
- // Not sure what version of LAME this is - look in padding of last frame for longer version string
- $PossibleLAMEversionStringOffset = $info['avdataend'] - $PossiblyLongerLAMEversion_FrameLength;
- $this->fseek($PossibleLAMEversionStringOffset);
- $PossiblyLongerLAMEversion_Data = $this->fread($PossiblyLongerLAMEversion_FrameLength);
- switch (substr($CurrentDataLAMEversionString, -1)) {
- case 'a':
- case 'b':
- // "LAME3.94a" will have a longer version string of "LAME3.94 (alpha)" for example
- // need to trim off "a" to match longer string
- $CurrentDataLAMEversionString = substr($CurrentDataLAMEversionString, 0, -1);
- break;
- }
- if (($PossiblyLongerLAMEversion_String = strstr($PossiblyLongerLAMEversion_Data, $CurrentDataLAMEversionString)) !== false) {
- if (substr($PossiblyLongerLAMEversion_String, 0, strlen($CurrentDataLAMEversionString)) == $CurrentDataLAMEversionString) {
- $PossiblyLongerLAMEversion_NewString = substr($PossiblyLongerLAMEversion_String, 0, strspn($PossiblyLongerLAMEversion_String, 'LAME0123456789., (abcdefghijklmnopqrstuvwxyzJFSOND)')); //"LAME3.90.3" "LAME3.87 (beta 1, Sep 27 2000)" "LAME3.88 (beta)"
- if (empty($info['audio']['encoder']) || (strlen($PossiblyLongerLAMEversion_NewString) > strlen($info['audio']['encoder']))) {
- $info['audio']['encoder'] = $PossiblyLongerLAMEversion_NewString;
- }
- }
- }
- }
- if (!empty($info['audio']['encoder'])) {
- $info['audio']['encoder'] = rtrim($info['audio']['encoder'], "\x00 ");
- }
- switch (isset($info['mpeg']['audio']['layer']) ? $info['mpeg']['audio']['layer'] : '') {
- case 1:
- case 2:
- $info['audio']['dataformat'] = 'mp'.$info['mpeg']['audio']['layer'];
- break;
- }
- if (isset($info['fileformat']) && ($info['fileformat'] == 'mp3')) {
- switch ($info['audio']['dataformat']) {
- case 'mp1':
- case 'mp2':
- case 'mp3':
- $info['fileformat'] = $info['audio']['dataformat'];
- break;
- default:
- $info['warning'][] = 'Expecting [audio][dataformat] to be mp1/mp2/mp3 when fileformat == mp3, [audio][dataformat] actually "'.$info['audio']['dataformat'].'"';
- break;
- }
- }
- if (empty($info['fileformat'])) {
- unset($info['fileformat']);
- unset($info['audio']['bitrate_mode']);
- unset($info['avdataoffset']);
- unset($info['avdataend']);
- return false;
- }
- $info['mime_type'] = 'audio/mpeg';
- $info['audio']['lossless'] = false;
- // Calculate playtime
- if (!isset($info['playtime_seconds']) && isset($info['audio']['bitrate']) && ($info['audio']['bitrate'] > 0)) {
- $info['playtime_seconds'] = ($info['avdataend'] - $info['avdataoffset']) * 8 / $info['audio']['bitrate'];
- }
- $info['audio']['encoder_options'] = $this->GuessEncoderOptions();
- return true;
- }
- public function GuessEncoderOptions() {
- // shortcuts
- $info = &$this->getid3->info;
- if (!empty($info['mpeg']['audio'])) {
- $thisfile_mpeg_audio = &$info['mpeg']['audio'];
- if (!empty($thisfile_mpeg_audio['LAME'])) {
- $thisfile_mpeg_audio_lame = &$thisfile_mpeg_audio['LAME'];
- }
- }
- $encoder_options = '';
- static $NamedPresetBitrates = array(16, 24, 40, 56, 112, 128, 160, 192, 256);
- if (isset($thisfile_mpeg_audio['VBR_method']) && ($thisfile_mpeg_audio['VBR_method'] == 'Fraunhofer') && !empty($thisfile_mpeg_audio['VBR_quality'])) {
- $encoder_options = 'VBR q'.$thisfile_mpeg_audio['VBR_quality'];
- } elseif (!empty($thisfile_mpeg_audio_lame['preset_used']) && (!in_array($thisfile_mpeg_audio_lame['preset_used_id'], $NamedPresetBitrates))) {
- $encoder_options = $thisfile_mpeg_audio_lame['preset_used'];
- } elseif (!empty($thisfile_mpeg_audio_lame['vbr_quality'])) {
- static $KnownEncoderValues = array();
- if (empty($KnownEncoderValues)) {
- //$KnownEncoderValues[abrbitrate_minbitrate][vbr_quality][raw_vbr_method][raw_noise_shaping][raw_stereo_mode][ath_type][lowpass_frequency] = 'preset name';
- $KnownEncoderValues[0xFF][58][1][1][3][2][20500] = '--alt-preset insane'; // 3.90, 3.90.1, 3.92
- $KnownEncoderValues[0xFF][58][1][1][3][2][20600] = '--alt-preset insane'; // 3.90.2, 3.90.3, 3.91
- $KnownEncoderValues[0xFF][57][1][1][3][4][20500] = '--alt-preset insane'; // 3.94, 3.95
- $KnownEncoderValues['**'][78][3][2][3][2][19500] = '--alt-preset extreme'; // 3.90, 3.90.1, 3.92
- $KnownEncoderValues['**'][78][3][2][3][2][19600] = '--alt-preset extreme'; // 3.90.2, 3.91
- $KnownEncoderValues['**'][78][3][1][3][2][19600] = '--alt-preset extreme'; // 3.90.3
- $KnownEncoderValues['**'][78][4][2][3][2][19500] = '--alt-preset fast extreme'; // 3.90, 3.90.1, 3.92
- $KnownEncoderValues['**'][78][4][2][3][2][19600] = '--alt-preset fast extreme'; // 3.90.2, 3.90.3, 3.91
- $KnownEncoderValues['**'][78][3][2][3][4][19000] = '--alt-preset standard'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92
- $KnownEncoderValues['**'][78][3][1][3][4][19000] = '--alt-preset standard'; // 3.90.3
- $KnownEncoderValues['**'][78][4][2][3][4][19000] = '--alt-preset fast standard'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92
- $KnownEncoderValues['**'][78][4][1][3][4][19000] = '--alt-preset fast standard'; // 3.90.3
- $KnownEncoderValues['**'][88][4][1][3][3][19500] = '--r3mix'; // 3.90, 3.90.1, 3.92
- $KnownEncoderValues['**'][88][4][1][3][3][19600] = '--r3mix'; // 3.90.2, 3.90.3, 3.91
- $KnownEncoderValues['**'][67][4][1][3][4][18000] = '--r3mix'; // 3.94, 3.95
- $KnownEncoderValues['**'][68][3][2][3][4][18000] = '--alt-preset medium'; // 3.90.3
- $KnownEncoderValues['**'][68][4][2][3][4][18000] = '--alt-preset fast medium'; // 3.90.3
- $KnownEncoderValues[0xFF][99][1][1][1][2][0] = '--preset studio'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92
- $KnownEncoderValues[0xFF][58][2][1][3][2][20600] = '--preset studio'; // 3.90.3, 3.93.1
- $KnownEncoderValues[0xFF][58][2][1][3][2][20500] = '--preset studio'; // 3.93
- $KnownEncoderValues[0xFF][57][2][1][3][4][20500] = '--preset studio'; // 3.94, 3.95
- $KnownEncoderValues[0xC0][88][1][1][1][2][0] = '--preset cd'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92
- $KnownEncoderValues[0xC0][58][2][2][3][2][19600] = '--preset cd'; // 3.90.3, 3.93.1
- $KnownEncoderValues[0xC0][58][2][2][3][2][19500] = '--preset cd'; // 3.93
- $KnownEncoderValues[0xC0][57][2][1][3][4][19500] = '--preset cd'; // 3.94, 3.95
- $KnownEncoderValues[0xA0][78][1][1][3][2][18000] = '--preset hifi'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92
- $KnownEncoderValues[0xA0][58][2][2][3][2][18000] = '--preset hifi'; // 3.90.3, 3.93, 3.93.1
- $KnownEncoderValues[0xA0][57][2][1][3][4][18000] = '--preset hifi'; // 3.94, 3.95
- $KnownEncoderValues[0x80][67][1][1][3][2][18000] = '--preset tape'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92
- $KnownEncoderValues[0x80][67][1][1][3][2][15000] = '--preset radio'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92
- $KnownEncoderValues[0x70][67][1][1][3][2][15000] = '--preset fm'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92
- $KnownEncoderValues[0x70][58][2][2][3][2][16000] = '--preset tape/radio/fm'; // 3.90.3, 3.93, 3.93.1
- $KnownEncoderValues[0x70][57][2][1][3][4][16000] = '--preset tape/radio/fm'; // 3.94, 3.95
- $KnownEncoderValues[0x38][58][2][2][0][2][10000] = '--preset voice'; // 3.90.3, 3.93, 3.93.1
- $KnownEncoderValues[0x38][57][2][1][0][4][15000] = '--preset voice'; // 3.94, 3.95
- $KnownEncoderValues[0x38][57][2][1][0][4][16000] = '--preset voice'; // 3.94a14
- $KnownEncoderValues[0x28][65][1][1][0][2][7500] = '--preset mw-us'; // 3.90, 3.90.1, 3.92
- $KnownEncoderValues[0x28][65][1][1][0][2][7600] = '--preset mw-us'; // 3.90.2, 3.91
- $KnownEncoderValues[0x28][58][2][2][0][2][7000] = '--preset mw-us'; // 3.90.3, 3.93, 3.93.1
- $KnownEncoderValues[0x28][57][2][1][0][4][10500] = '--preset mw-us'; // 3.94, 3.95
- $KnownEncoderValues[0x28][57][2][1][0][4][11200] = '--preset mw-us'; // 3.94a14
- $KnownEncoderValues[0x28][57][2][1][0][4][8800] = '--preset mw-us'; // 3.94a15
- $KnownEncoderValues[0x18][58][2][2][0][2][4000] = '--preset phon+/lw/mw-eu/sw'; // 3.90.3, 3.93.1
- $KnownEncoderValues[0x18][58][2][2][0][2][3900] = '--preset phon+/lw/mw-eu/sw'; // 3.93
- $KnownEncoderValues[0x18][57][2][1][0][4][5900] = '--preset phon+/lw/mw-eu/sw'; // 3.94, 3.95
- $KnownEncoderValues[0x18][57][2][1][0][4][6200] = '--preset phon+/lw/mw-eu/sw'; // 3.94a14
- $KnownEncoderValues[0x18][57][2][1][0][4][3200] = '--preset phon+/lw/mw-eu/sw'; // 3.94a15
- $KnownEncoderValues[0x10][58][2][2][0][2][3800] = '--preset phone'; // 3.90.3, 3.93.1
- $KnownEncoderValues[0x10][58][2][2][0][2][3700] = '--preset phone'; // 3.93
- $KnownEncoderValues[0x10][57][2][1][0][4][5600] = '--preset phone'; // 3.94, 3.95
- }
- if (isset($KnownEncoderValues[$thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate']][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']])) {
- $encoder_options = $KnownEncoderValues[$thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate']][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']];
- } elseif (isset($KnownEncoderValues['**'][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']])) {
- $encoder_options = $KnownEncoderValues['**'][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']];
- } elseif ($info['audio']['bitrate_mode'] == 'vbr') {
- // http://gabriel.mp3-tech.org/mp3infotag.html
- // int Quality = (100 - 10 * gfp->VBR_q - gfp->quality)h
- $LAME_V_value = 10 - ceil($thisfile_mpeg_audio_lame['vbr_quality'] / 10);
- $LAME_q_value = 100 - $thisfile_mpeg_audio_lame['vbr_quality'] - ($LAME_V_value * 10);
- $encoder_options = '-V'.$LAME_V_value.' -q'.$LAME_q_value;
- } elseif ($info['audio']['bitrate_mode'] == 'cbr') {
- $encoder_options = strtoupper($info['audio']['bitrate_mode']).ceil($info['audio']['bitrate'] / 1000);
- } else {
- $encoder_options = strtoupper($info['audio']['bitrate_mode']);
- }
- } elseif (!empty($thisfile_mpeg_audio_lame['bitrate_abr'])) {
- $encoder_options = 'ABR'.$thisfile_mpeg_audio_lame['bitrate_abr'];
- } elseif (!empty($info['audio']['bitrate'])) {
- if ($info['audio']['bitrate_mode'] == 'cbr') {
- $encoder_options = strtoupper($info['audio']['bitrate_mode']).ceil($info['audio']['bitrate'] / 1000);
- } else {
- $encoder_options = strtoupper($info['audio']['bitrate_mode']);
- }
- }
- if (!empty($thisfile_mpeg_audio_lame['bitrate_min'])) {
- $encoder_options .= ' -b'.$thisfile_mpeg_audio_lame['bitrate_min'];
- }
- if (!empty($thisfile_mpeg_audio_lame['encoding_flags']['nogap_prev']) || !empty($thisfile_mpeg_audio_lame['encoding_flags']['nogap_next'])) {
- $encoder_options .= ' --nogap';
- }
- if (!empty($thisfile_mpeg_audio_lame['lowpass_frequency'])) {
- $ExplodedOptions = explode(' ', $encoder_options, 4);
- if ($ExplodedOptions[0] == '--r3mix') {
- $ExplodedOptions[1] = 'r3mix';
- }
- switch ($ExplodedOptions[0]) {
- case '--preset':
- case '--alt-preset':
- case '--r3mix':
- if ($ExplodedOptions[1] == 'fast') {
- $ExplodedOptions[1] .= ' '.$ExplodedOptions[2];
- }
- switch ($ExplodedOptions[1]) {
- case 'portable':
- case 'medium':
- case 'standard':
- case 'extreme':
- case 'insane':
- case 'fast portable':
- case 'fast medium':
- case 'fast standard':
- case 'fast extreme':
- case 'fast insane':
- case 'r3mix':
- static $ExpectedLowpass = array(
- 'insane|20500' => 20500,
- 'insane|20600' => 20600, // 3.90.2, 3.90.3, 3.91
- 'medium|18000' => 18000,
- 'fast medium|18000' => 18000,
- 'extreme|19500' => 19500, // 3.90, 3.90.1, 3.92, 3.95
- 'extreme|19600' => 19600, // 3.90.2, 3.90.3, 3.91, 3.93.1
- 'fast extreme|19500' => 19500, // 3.90, 3.90.1, 3.92, 3.95
- 'fast extreme|19600' => 19600, // 3.90.2, 3.90.3, 3.91, 3.93.1
- 'standard|19000' => 19000,
- 'fast standard|19000' => 19000,
- 'r3mix|19500' => 19500, // 3.90, 3.90.1, 3.92
- 'r3mix|19600' => 19600, // 3.90.2, 3.90.3, 3.91
- 'r3mix|18000' => 18000, // 3.94, 3.95
- );
- if (!isset($ExpectedLowpass[$ExplodedOptions[1].'|'.$thisfile_mpeg_audio_lame['lowpass_frequency']]) && ($thisfile_mpeg_audio_lame['lowpass_frequency'] < 22050) && (round($thisfile_mpeg_audio_lame['lowpass_frequency'] / 1000) < round($thisfile_mpeg_audio['sample_rate'] / 2000))) {
- $encoder_options .= ' --lowpass '.$thisfile_mpeg_audio_lame['lowpass_frequency'];
- }
- break;
- default:
- break;
- }
- break;
- }
- }
- if (isset($thisfile_mpeg_audio_lame['raw']['source_sample_freq'])) {
- if (($thisfile_mpeg_audio['sample_rate'] == 44100) && ($thisfile_mpeg_audio_lame['raw']['source_sample_freq'] != 1)) {
- $encoder_options .= ' --resample 44100';
- } elseif (($thisfile_mpeg_audio['sample_rate'] == 48000) && ($thisfile_mpeg_audio_lame['raw']['source_sample_freq'] != 2)) {
- $encoder_options .= ' --resample 48000';
- } elseif ($thisfile_mpeg_audio['sample_rate'] < 44100) {
- switch ($thisfile_mpeg_audio_lame['raw']['source_sample_freq']) {
- case 0: // <= 32000
- // may or may not be same as source frequency - ignore
- break;
- case 1: // 44100
- case 2: // 48000
- case 3: // 48000+
- $ExplodedOptions = explode(' ', $encoder_options, 4);
- switch ($ExplodedOptions[0]) {
- case '--preset':
- case '--alt-preset':
- switch ($ExplodedOptions[1]) {
- case 'fast':
- case 'portable':
- case 'medium':
- case 'standard':
- case 'extreme':
- case 'insane':
- $encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate'];
- break;
- default:
- static $ExpectedResampledRate = array(
- 'phon+/lw/mw-eu/sw|16000' => 16000,
- 'mw-us|24000' => 24000, // 3.95
- 'mw-us|32000' => 32000, // 3.93
- 'mw-us|16000' => 16000, // 3.92
- 'phone|16000' => 16000,
- 'phone|11025' => 11025, // 3.94a15
- 'radio|32000' => 32000, // 3.94a15
- 'fm/radio|32000' => 32000, // 3.92
- 'fm|32000' => 32000, // 3.90
- 'voice|32000' => 32000);
- if (!isset($ExpectedResampledRate[$ExplodedOptions[1].'|'.$thisfile_mpeg_audio['sample_rate']])) {
- $encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate'];
- }
- break;
- }
- break;
- case '--r3mix':
- default:
- $encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate'];
- break;
- }
- break;
- }
- }
- }
- if (empty($encoder_options) && !empty($info['audio']['bitrate']) && !empty($info['audio']['bitrate_mode'])) {
- //$encoder_options = strtoupper($info['audio']['bitrate_mode']).ceil($info['audio']['bitrate'] / 1000);
- $encoder_options = strtoupper($info['audio']['bitrate_mode']);
- }
- return $encoder_options;
- }
- public function decodeMPEGaudioHeader($offset, &$info, $recursivesearch=true, $ScanAsCBR=false, $FastMPEGheaderScan=false) {
- static $MPEGaudioVersionLookup;
- static $MPEGaudioLayerLookup;
- static $MPEGaudioBitrateLookup;
- static $MPEGaudioFrequencyLookup;
- static $MPEGaudioChannelModeLookup;
- static $MPEGaudioModeExtensionLookup;
- static $MPEGaudioEmphasisLookup;
- if (empty($MPEGaudioVersionLookup)) {
- $MPEGaudioVersionLookup = self::MPEGaudioVersionArray();
- $MPEGaudioLayerLookup = self::MPEGaudioLayerArray();
- $MPEGaudioBitrateLookup = self::MPEGaudioBitrateArray();
- $MPEGaudioFrequencyLookup = self::MPEGaudioFrequencyArray();
- $MPEGaudioChannelModeLookup = self::MPEGaudioChannelModeArray();
- $MPEGaudioModeExtensionLookup = self::MPEGaudioModeExtensionArray();
- $MPEGaudioEmphasisLookup = self::MPEGaudioEmphasisArray();
- }
- if ($this->fseek($offset) != 0) {
- $info['error'][] = 'decodeMPEGaudioHeader() failed to seek to next offset at '.$offset;
- return false;
- }
- //$headerstring = $this->fread(1441); // worst-case max length = 32kHz @ 320kbps layer 3 = 1441 bytes/frame
- $headerstring = $this->fread(226); // LAME header at offset 36 + 190 bytes of Xing/LAME data
- // MP3 audio frame structure:
- // $aa $aa $aa $aa [$bb $bb] $cc...
- // where $aa..$aa is the four-byte mpeg-audio header (below)
- // $bb $bb is the optional 2-byte CRC
- // and $cc... is the audio data
- $head4 = substr($headerstring, 0, 4);
- static $MPEGaudioHeaderDecodeCache = array();
- if (isset($MPEGaudioHeaderDecodeCache[$head4])) {
- $MPEGheaderRawArray = $MPEGaudioHeaderDecodeCache[$head4];
- } else {
- $MPEGheaderRawArray = self::MPEGaudioHeaderDecode($head4);
- $MPEGaudioHeaderDecodeCache[$head4] = $MPEGheaderRawArray;
- }
- static $MPEGaudioHeaderValidCache = array();
- if (!isset($MPEGaudioHeaderValidCache[$head4])) { // Not in cache
- //$MPEGaudioHeaderValidCache[$head4] = self::MPEGaudioHeaderValid($MPEGheaderRawArray, false, true); // allow badly-formatted freeformat (from LAME 3.90 - 3.93.1)
- $MPEGaudioHeaderValidCache[$head4] = self::MPEGaudioHeaderValid($MPEGheaderRawArray, false, false);
- }
- // shortcut
- if (!isset($info['mpeg']['audio'])) {
- $info['mpeg']['audio'] = array();
- }
- $thisfile_mpeg_audio = &$info['mpeg']['audio'];
- if ($MPEGaudioHeaderValidCache[$head4]) {
- $thisfile_mpeg_audio['raw'] = $MPEGheaderRawArray;
- } else {
- $info['error'][] = 'Invalid MPEG audio header ('.getid3_lib::PrintHexBytes($head4).') at offset '.$offset;
- return false;
- }
- if (!$FastMPEGheaderScan) {
- $thisfile_mpeg_audio['version'] = $MPEGaudioVersionLookup[$thisfile_mpeg_audio['raw']['version']];
- $thisfile_mpeg_audio['layer'] = $MPEGaudioLayerLookup[$thisfile_mpeg_audio['raw']['layer']];
- $thisfile_mpeg_audio['channelmode'] = $MPEGaudioChannelModeLookup[$thisfile_mpeg_audio['raw']['channelmode']];
- $thisfile_mpeg_audio['channels'] = (($thisfile_mpeg_audio['channelmode'] == 'mono') ? 1 : 2);
- $thisfile_mpeg_audio['sample_rate'] = $MPEGaudioFrequencyLookup[$thisfile_mpeg_audio['version']][$thisfile_mpeg_audio['raw']['sample_rate']];
- $thisfile_mpeg_audio['protection'] = !$thisfile_mpeg_audio['raw']['protection'];
- $thisfile_mpeg_audio['private'] = (bool) $thisfile_mpeg_audio['raw']['private'];
- $thisfile_mpeg_audio['modeextension'] = $MPEGaudioModeExtensionLookup[$thisfile_mpeg_audio['layer']][$thisfile_mpeg_audio['raw']['modeextension']];
- $thisfile_mpeg_audio['copyright'] = (bool) $thisfile_mpeg_audio['raw']['copyright'];
- $thisfile_mpeg_audio['original'] = (bool) $thisfile_mpeg_audio['raw']['original'];
- $thisfile_mpeg_audio['emphasis'] = $MPEGaudioEmphasisLookup[$thisfile_mpeg_audio['raw']['emphasis']];
- $info['audio']['channels'] = $thisfile_mpeg_audio['channels'];
- $info['audio']['sample_rate'] = $thisfile_mpeg_audio['sample_rate'];
- if ($thisfile_mpeg_audio['protection']) {
- $thisfile_mpeg_audio['crc'] = getid3_lib::BigEndian2Int(substr($headerstring, 4, 2));
- }
- }
- if ($thisfile_mpeg_audio['raw']['bitrate'] == 15) {
- // http://www.hydrogenaudio.org/?act=ST&f=16&t=9682&st=0
- $info['warning'][] = 'Invalid bitrate index (15), this is a known bug in free-format MP3s encoded by LAME v3.90 - 3.93.1';
- $thisfile_mpeg_audio['raw']['bitrate'] = 0;
- }
- $thisfile_mpeg_audio['padding'] = (bool) $thisfile_mpeg_audio['raw']['padding'];
- $thisfile_mpeg_audio['bitrate'] = $MPEGaudioBitrateLookup[$thisfile_mpeg_audio['version']][$thisfile_mpeg_audio['layer']][$thisfile_mpeg_audio['raw']['bitrate']];
- if (($thisfile_mpeg_audio['bitrate'] == 'free') && ($offset == $info['avdataoffset'])) {
- // only skip multiple frame check if free-format bitstream found at beginning of file
- // otherwise is quite possibly simply corrupted data
- $recursivesearch = false;
- }
- // For Layer 2 there are some combinations of bitrate and mode which are not allowed.
- if (!$FastMPEGheaderScan && ($thisfile_mpeg_audio['layer'] == '2')) {
- $info['audio']['dataformat'] = 'mp2';
- switch ($thisfile_mpeg_audio['channelmode']) {
- case 'mono':
- if (($thisfile_mpeg_audio['bitrate'] == 'free') || ($thisfile_mpeg_audio['bitrate'] <= 192000)) {
- // these are ok
- } else {
- $info['error'][] = $thisfile_mpeg_audio['bitrate'].'kbps not allowed in Layer 2, '.$thisfile_mpeg_audio['channelmode'].'.';
- return false;
- }
- break;
- case 'stereo':
- case 'joint stereo':
- case 'dual channel':
- if (($thisfile_mpeg_audio['bitrate'] == 'free') || ($thisfile_mpeg_audio['bitrate'] == 64000) || ($thisfile_mpeg_audio['bitrate'] >= 96000)) {
- // these are ok
- } else {
- $info['error'][] = intval(round($thisfile_mpeg_audio['bitrate'] / 1000)).'kbps not allowed in Layer 2, '.$thisfile_mpeg_audio['channelmode'].'.';
- return false;
- }
- break;
- }
- }
- if ($info['audio']['sample_rate'] > 0) {
- $thisfile_mpeg_audio['framelength'] = self::MPEGaudioFrameLength($thisfile_mpeg_audio['bitrate'], $thisfile_mpeg_audio['version'], $thisfile_mpeg_audio['layer'], (int) $thisfile_mpeg_audio['padding'], $info['audio']['sample_rate']);
- }
- $nextframetestoffset = $offset + 1;
- if ($thisfile_mpeg_audio['bitrate'] != 'free') {
- $info['audio']['bitrate'] = $thisfile_mpeg_audio['bitrate'];
- if (isset($thisfile_mpeg_audio['framelength'])) {
- $nextframetestoffset = $offset + $thisfile_mpeg_audio['framelength'];
- } else {
- $info['error'][] = 'Frame at offset('.$offset.') is has an invalid frame length.';
- return false;
- }
- }
- $ExpectedNumberOfAudioBytes = 0;
- ////////////////////////////////////////////////////////////////////////////////////
- // Variable-bitrate headers
- if (substr($headerstring, 4 + 32, 4) == 'VBRI') {
- // Fraunhofer VBR header is hardcoded 'VBRI' at offset 0x24 (36)
- // specs taken from http://minnie.tuhs.org/pipermail/mp3encoder/2001-January/001800.html
- $thisfile_mpeg_audio['bitrate_mode'] = 'vbr';
- $thisfile_mpeg_audio['VBR_method'] = 'Fraunhofer';
- $info['audio']['codec'] = 'Fraunhofer';
- $SideInfoData = substr($headerstring, 4 + 2, 32);
- $FraunhoferVBROffset = 36;
- $thisfile_mpeg_audio['VBR_encoder_version'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 4, 2)); // VbriVersion
- $thisfile_mpeg_audio['VBR_encoder_delay'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 6, 2)); // VbriDelay
- $thisfile_mpeg_audio['VBR_quality'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 8, 2)); // VbriQuality
- $thisfile_mpeg_audio['VBR_bytes'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 10, 4)); // VbriStreamBytes
- $thisfile_mpeg_audio['VBR_frames'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 14, 4)); // VbriStreamFrames
- $thisfile_mpeg_audio['VBR_seek_offsets'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 18, 2)); // VbriTableSize
- $thisfile_mpeg_audio['VBR_seek_scale'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 20, 2)); // VbriTableScale
- $thisfile_mpeg_audio['VBR_entry_bytes'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 22, 2)); // VbriEntryBytes
- $thisfile_mpeg_audio['VBR_entry_frames'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 24, 2)); // VbriEntryFrames
- $ExpectedNumberOfAudioBytes = $thisfile_mpeg_audio['VBR_bytes'];
- $previousbyteoffset = $offset;
- for ($i = 0; $i < $thisfile_mpeg_audio['VBR_seek_offsets']; $i++) {
- $Fraunhofer_OffsetN = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset, $thisfile_mpeg_audio['VBR_entry_bytes']));
- $FraunhoferVBROffset += $thisfile_mpeg_audio['VBR_entry_bytes'];
- $thisfile_mpeg_audio['VBR_offsets_relative'][$i] = ($Fraunhofer_OffsetN * $thisfile_mpeg_audio['VBR_seek_scale']);
- $thisfile_mpeg_audio['VBR_offsets_absolute'][$i] = ($Fraunhofer_OffsetN * $thisfile_mpeg_audio['VBR_seek_scale']) + $previousbyteoffset;
- $previousbyteoffset += $Fraunhofer_OffsetN;
- }
- } else {
- // Xing VBR header is hardcoded 'Xing' at a offset 0x0D (13), 0x15 (21) or 0x24 (36)
- // depending on MPEG layer and number of channels
- $VBRidOffset = self::XingVBRidOffset($thisfile_mpeg_audio['version'], $thisfile_mpeg_audio['channelmode']);
- $SideInfoData = substr($headerstring, 4 + 2, $VBRidOffset - 4);
- if ((substr($headerstring, $VBRidOffset, strlen('Xing')) == 'Xing') || (substr($headerstring, $VBRidOffset, strlen('Info')) == 'Info')) {
- // 'Xing' is traditional Xing VBR frame
- // 'Info' is LAME-encoded CBR (This was done to avoid CBR files to be recognized as traditional Xing VBR files by some decoders.)
- // 'Info' *can* legally be used to specify a VBR file as well, however.
- // http://www.multiweb.cz/twoinches/MP3inside.htm
- //00..03 = "Xing" or "Info"
- //04..07 = Flags:
- // 0x01 Frames Flag set if value for number of frames in file is stored
- // 0x02 Bytes Flag set if value for filesize in bytes is stored
- // 0x04 TOC Flag set if values for TOC are stored
- // 0x08 VBR Scale Flag set if values for VBR scale is stored
- //08..11 Frames: Number of frames in file (including the first Xing/Info one)
- //12..15 Bytes: File length in Bytes
- //16..115 TOC (Table of Contents):
- // Contains of 100 indexes (one Byte length) for easier lookup in file. Approximately solves problem with moving inside file.
- // Each Byte has a value according this formula:
- // (TOC[i] / 256) * fileLenInBytes
- // So if song lasts eg. 240 sec. and you want to jump to 60. sec. (and file is 5 000 000 Bytes length) you can use:
- // TOC[(60/240)*100] = TOC[25]
- // and corresponding Byte in file is then approximately at:
- // (TOC[25]/256) * 5000000
- //116..119 VBR Scale
- // should be safe to leave this at 'vbr' and let it be overriden to 'cbr' if a CBR preset/mode is used by LAME
- // if (substr($headerstring, $VBRidOffset, strlen('Info')) == 'Xing') {
- $thisfile_mpeg_audio['bitrate_mode'] = 'vbr';
- $thisfile_mpeg_audio['VBR_method'] = 'Xing';
- // } else {
- // $ScanAsCBR = true;
- // $thisfile_mpeg_audio['bitrate_mode'] = 'cbr';
- // }
- $thisfile_mpeg_audio['xing_flags_raw'] = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset + 4, 4));
- $thisfile_mpeg_audio['xing_flags']['frames'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000001);
- $thisfile_mpeg_audio['xing_flags']['bytes'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000002);
- $thisfile_mpeg_audio['xing_flags']['toc'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000004);
- $thisfile_mpeg_audio['xing_flags']['vbr_scale'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000008);
- if ($thisfile_mpeg_audio['xing_flags']['frames']) {
- $thisfile_mpeg_audio['VBR_frames'] = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset + 8, 4));
- //$thisfile_mpeg_audio['VBR_frames']--; // don't count header Xing/Info frame
- }
- if ($thisfile_mpeg_audio['xing_flags']['bytes']) {
- $thisfile_mpeg_audio['VBR_bytes'] = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset + 12, 4));
- }
- //if (($thisfile_mpeg_audio['bitrate'] == 'free') && !empty($thisfile_mpeg_audio['VBR_frames']) && !empty($thisfile_mpeg_audio['VBR_bytes'])) {
- if (!empty($thisfile_mpeg_audio['VBR_frames']) && !empty($thisfile_mpeg_audio['VBR_bytes'])) {
- $framelengthfloat = $thisfile_mpeg_audio['VBR_bytes'] / $thisfile_mpeg_audio['VBR_frames'];
- if ($thisfile_mpeg_audio['layer'] == '1') {
- // BitRate = (((FrameLengthInBytes / 4) - Padding) * SampleRate) / 12
- //$info['audio']['bitrate'] = ((($framelengthfloat / 4) - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 12;
- $info['audio']['bitrate'] = ($framelengthfloat / 4) * $thisfile_mpeg_audio['sample_rate'] * (2 / $info['audio']['channels']) / 12;
- } else {
- // Bitrate = ((FrameLengthInBytes - Padding) * SampleRate) / 144
- //$info['audio']['bitrate'] = (($framelengthfloat - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 144;
- $info['audio']['bitrate'] = $framelengthfloat * $thisfile_mpeg_audio['sample_rate'] * (2 / $info['audio']['channels']) / 144;
- }
- $thisfile_mpeg_audio['framelength'] = floor($framelengthfloat);
- }
- if ($thisfile_mpeg_audio['xing_flags']['toc']) {
- $LAMEtocData = substr($headerstring, $VBRidOffset + 16, 100);
- for ($i = 0; $i < 100; $i++) {
- $thisfile_mpeg_audio['toc'][$i] = ord($LAMEtocData{$i});
- }
- }
- if ($thisfile_mpeg_audio['xing_flags']['vbr_scale']) {
- $thisfile_mpeg_audio['VBR_scale'] = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset + 116, 4));
- }
- // http://gabriel.mp3-tech.org/mp3infotag.html
- if (substr($headerstring, $VBRidOffset + 120, 4) == 'LAME') {
- // shortcut
- $thisfile_mpeg_audio['LAME'] = array();
- $thisfile_mpeg_audio_lame = &$thisfile_mpeg_audio['LAME'];
- $thisfile_mpeg_audio_lame['long_version'] = substr($headerstring, $VBRidOffset + 120, 20);
- $thisfile_mpeg_audio_lame['short_version'] = substr($thisfile_mpeg_audio_lame['long_version'], 0, 9);
- if ($thisfile_mpeg_audio_lame['short_version'] >= 'LAME3.90') {
- // extra 11 chars are not part of version string when LAMEtag present
- unset($thisfile_mpeg_audio_lame['long_version']);
- // It the LAME tag was only introduced in LAME v3.90
- // http://www.hydrogenaudio.org/?act=ST&f=15&t=9933
- // Offsets of various bytes in http://gabriel.mp3-tech.org/mp3infotag.html
- // are assuming a 'Xing' identifier offset of 0x24, which is the case for
- // MPEG-1 non-mono, but not for other combinations
- $LAMEtagOffsetContant = $VBRidOffset - 0x24;
- // shortcuts
- $thisfile_mpeg_audio_lame['RGAD'] = array('track'=>array(), 'album'=>array());
- $thisfile_mpeg_audio_lame_RGAD = &$thisfile_mpeg_audio_lame['RGAD'];
- $thisfile_mpeg_audio_lame_RGAD_track = &$thisfile_mpeg_audio_lame_RGAD['track'];
- $thisfile_mpeg_audio_lame_RGAD_album = &$thisfile_mpeg_audio_lame_RGAD['album'];
- $thisfile_mpeg_audio_lame['raw'] = array();
- $thisfile_mpeg_audio_lame_raw = &$thisfile_mpeg_audio_lame['raw'];
- // byte $9B VBR Quality
- // This field is there to indicate a quality level, although the scale was not precised in the original Xing specifications.
- // Actually overwrites original Xing bytes
- unset($thisfile_mpeg_audio['VBR_scale']);
- $thisfile_mpeg_audio_lame['vbr_quality'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0x9B, 1));
- // bytes $9C-$A4 Encoder short VersionString
- $thisfile_mpeg_audio_lame['short_version'] = substr($headerstring, $LAMEtagOffsetContant + 0x9C, 9);
- // byte $A5 Info Tag revision + VBR method
- $LAMEtagRevisionVBRmethod = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xA5, 1));
- $thisfile_mpeg_audio_lame['tag_revision'] = ($LAMEtagRevisionVBRmethod & 0xF0) >> 4;
- $thisfile_mpeg_audio_lame_raw['vbr_method'] = $LAMEtagRevisionVBRmethod & 0x0F;
- $thisfile_mpeg_audio_lame['vbr_method'] = self::LAMEvbrMethodLookup($thisfile_mpeg_audio_lame_raw['vbr_method']);
- $thisfile_mpeg_audio['bitrate_mode'] = substr($thisfile_mpeg_audio_lame['vbr_method'], 0, 3); // usually either 'cbr' or 'vbr', but truncates 'vbr-old / vbr-rh' to 'vbr'
- // byte $A6 Lowpass filter value
- $thisfile_mpeg_audio_lame['lowpass_frequency'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xA6, 1)) * 100;
- // bytes $A7-$AE Replay Gain
- // http://privatewww.essex.ac.uk/~djmrob/replaygain/rg_data_format.html
- // bytes $A7-$AA : 32 bit floating point "Peak signal amplitude"
- if ($thisfile_mpeg_audio_lame['short_version'] >= 'LAME3.94b') {
- // LAME 3.94a16 and later - 9.23 fixed point
- // ie 0x0059E2EE / (2^23) = 5890798 / 8388608 = 0.7022378444671630859375
- $thisfile_mpeg_audio_lame_RGAD['peak_amplitude'] = (float) ((getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xA7, 4))) / 8388608);
- } else {
- // LAME 3.94a15 and earlier - 32-bit floating point
- // Actually 3.94a16 will fall in here too and be WRONG, but is hard to detect 3.94a16 vs 3.94a15
- $thisfile_mpeg_audio_lame_RGAD['peak_amplitude'] = getid3_lib::LittleEndian2Float(substr($headerstring, $LAMEtagOffsetContant + 0xA7, 4));
- }
- if ($thisfile_mpeg_audio_lame_RGAD['peak_amplitude'] == 0) {
- unset($thisfile_mpeg_audio_lame_RGAD['peak_amplitude']);
- } else {
- $thisfile_mpeg_audio_lame_RGAD['peak_db'] = getid3_lib::RGADamplitude2dB($thisfile_mpeg_audio_lame_RGAD['peak_amplitude']);
- }
- $thisfile_mpeg_audio_lame_raw['RGAD_track'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xAB, 2));
- $thisfile_mpeg_audio_lame_raw['RGAD_album'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xAD, 2));
- if ($thisfile_mpeg_audio_lame_raw['RGAD_track'] != 0) {
- $thisfile_mpeg_audio_lame_RGAD_track['raw']['name'] = ($thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0xE000) >> 13;
- $thisfile_mpeg_audio_lame_RGAD_track['raw']['originator'] = ($thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0x1C00) >> 10;
- $thisfile_mpeg_audio_lame_RGAD_track['raw']['sign_bit'] = ($thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0x0200) >> 9;
- $thisfile_mpeg_audio_lame_RGAD_track['raw']['gain_adjust'] = $thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0x01FF;
- $thisfile_mpeg_audio_lame_RGAD_track['name'] = getid3_lib::RGADnameLookup($thisfile_mpeg_audio_lame_RGAD_track['raw']['name']);
- $thisfile_mpeg_audio_lame_RGAD_track['originator'] = getid3_lib::RGADoriginatorLookup($thisfile_mpeg_audio_lame_RGAD_track['raw']['originator']);
- $thisfile_mpeg_audio_lame_RGAD_track['gain_db'] = getid3_lib::RGADadjustmentLookup($thisfile_mpeg_audio_lame_RGAD_track['raw']['gain_adjust'], $thisfile_mpeg_audio_lame_RGAD_track['raw']['sign_bit']);
- if (!empty($thisfile_mpeg_audio_lame_RGAD['peak_amplitude'])) {
- $info['replay_gain']['track']['peak'] = $thisfile_mpeg_audio_lame_RGAD['peak_amplitude'];
- }
- $info['replay_gain']['track']['originator'] = $thisfile_mpeg_audio_lame_RGAD_track['originator'];
- $info['replay_gain']['track']['adjustment'] = $thisfile_mpeg_audio_lame_RGAD_track['gain_db'];
- } else {
- unset($thisfile_mpeg_audio_lame_RGAD['track']);
- }
- if ($thisfile_mpeg_audio_lame_raw['RGAD_album'] != 0) {
- $thisfile_mpeg_audio_lame_RGAD_album['raw']['name'] = ($thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0xE000) >> 13;
- $thisfile_mpeg_audio_lame_RGAD_album['raw']['originator'] = ($thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0x1C00) >> 10;
- $thisfile_mpeg_audio_lame_RGAD_album['raw']['sign_bit'] = ($thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0x0200) >> 9;
- $thisfile_mpeg_audio_lame_RGAD_album['raw']['gain_adjust'] = $thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0x01FF;
- $thisfile_mpeg_audio_lame_RGAD_album['name'] = getid3_lib::RGADnameLookup($thisfile_mpeg_audio_lame_RGAD_album['raw']['name']);
- $thisfile_mpeg_audio_lame_RGAD_album['originator'] = getid3_lib::RGADoriginatorLookup($thisfile_mpeg_audio_lame_RGAD_album['raw']['originator']);
- $thisfile_mpeg_audio_lame_RGAD_album['gain_db'] = getid3_lib::RGADadjustmentLookup($thisfile_mpeg_audio_lame_RGAD_album['raw']['gain_adjust'], $thisfile_mpeg_audio_lame_RGAD_album['raw']['sign_bit']);
- if (!empty($thisfile_mpeg_audio_lame_RGAD['peak_amplitude'])) {
- $info['replay_gain']['album']['peak'] = $thisfile_mpeg_audio_lame_RGAD['peak_amplitude'];
- }
- $info['replay_gain']['album']['originator'] = $thisfile_mpeg_audio_lame_RGAD_album['originator'];
- $info['replay_gain']['album']['adjustment'] = $thisfile_mpeg_audio_lame_RGAD_album['gain_db'];
- } else {
- unset($thisfile_mpeg_audio_lame_RGAD['album']);
- }
- if (empty($thisfile_mpeg_audio_lame_RGAD)) {
- unset($thisfile_mpeg_audio_lame['RGAD']);
- }
- // byte $AF Encoding flags + ATH Type
- $EncodingFlagsATHtype = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xAF, 1));
- $thisfile_mpeg_audio_lame['encoding_flags']['nspsytune'] = (bool) ($EncodingFlagsATHtype & 0x10);
- $thisfile_mpeg_audio_lame['encoding_flags']['nssafejoint'] = (bool) ($EncodingFlagsATHtype & 0x20);
- $thisfile_mpeg_audio_lame['encoding_flags']['nogap_next'] = (bool) ($EncodingFlagsATHtype & 0x40);
- $thisfile_mpeg_audio_lame['encoding_flags']['nogap_prev'] = (bool) ($EncodingFlagsATHtype & 0x80);
- $thisfile_mpeg_audio_lame['ath_type'] = $EncodingFlagsATHtype & 0x0F;
- // byte $B0 if ABR {specified bitrate} else {minimal bitrate}
- $thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB0, 1));
- if ($thisfile_mpeg_audio_lame_raw['vbr_method'] == 2) { // Average BitRate (ABR)
- $thisfile_mpeg_audio_lame['bitrate_abr'] = $thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate'];
- } elseif ($thisfile_mpeg_audio_lame_raw['vbr_method'] == 1) { // Constant BitRate (CBR)
- // ignore
- } elseif ($thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate'] > 0) { // Variable BitRate (VBR) - minimum bitrate
- $thisfile_mpeg_audio_lame['bitrate_min'] = $thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate'];
- }
- // bytes $B1-$B3 Encoder delays
- $EncoderDelays = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB1, 3));
- $thisfile_mpeg_audio_lame['encoder_delay'] = ($EncoderDelays & 0xFFF000) >> 12;
- $thisfile_mpeg_audio_lame['end_padding'] = $EncoderDelays & 0x000FFF;
- // byte $B4 Misc
- $MiscByte = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB4, 1));
- $thisfile_mpeg_audio_lame_raw['noise_shaping'] = ($MiscByte & 0x03);
- $thisfile_mpeg_audio_lame_raw['stereo_mode'] = ($MiscByte & 0x1C) >> 2;
- $thisfile_mpeg_audio_lame_raw['not_optimal_quality'] = ($MiscByte & 0x20) >> 5;
- $thisfile_mpeg_audio_lame_raw['source_sample_freq'] = ($MiscByte & 0xC0) >> 6;
- $thisfile_mpeg_audio_lame['noise_shaping'] = $thisfile_mpeg_audio_lame_raw['noise_shaping'];
- $thisfile_mpeg_audio_lame['stereo_mode'] = self::LAMEmiscStereoModeLookup($thisfile_mpeg_audio_lame_raw['stereo_mode']);
- $thisfile_mpeg_audio_lame['not_optimal_quality'] = (bool) $thisfile_mpeg_audio_lame_raw['not_optimal_quality'];
- $thisfile_mpeg_audio_lame['source_sample_freq'] = self::LAMEmiscSourceSampleFrequencyLookup($thisfile_mpeg_audio_lame_raw['source_sample_freq']);
- // byte $B5 MP3 Gain
- $thisfile_mpeg_audio_lame_raw['mp3_gain'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB5, 1), false, true);
- $thisfile_mpeg_audio_lame['mp3_gain_db'] = (getid3_lib::RGADamplitude2dB(2) / 4) * $thisfile_mpeg_audio_lame_raw['mp3_gain'];
- $thisfile_mpeg_audio_lame['mp3_gain_factor'] = pow(2, ($thisfile_mpeg_audio_lame['mp3_gain_db'] / 6));
- // bytes $B6-$B7 Preset and surround info
- $PresetSurroundBytes = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB6, 2));
- // Reserved = ($PresetSurroundBytes & 0xC000);
- $thisfile_mpeg_audio_lame_raw['surround_info'] = ($PresetSurroundBytes & 0x3800);
- $thisfile_mpeg_audio_lame['surround_info'] = self::LAMEsurroundInfoLookup($thisfile_mpeg_audio_lame_raw['surround_info']);
- $thisfile_mpeg_audio_lame['preset_used_id'] = ($PresetSurroundBytes & 0x07FF);
- $thisfile_mpeg_audio_lame['preset_used'] = self::LAMEpresetUsedLookup($thisfile_mpeg_audio_lame);
- if (!empty($thisfile_mpeg_audio_lame['preset_used_id']) && empty($thisfile_mpeg_audio_lame['preset_used'])) {
- $info['warning'][] = 'Unknown LAME preset used ('.$thisfile_mpeg_audio_lame['preset_used_id'].') - please report to info@getid3.org';
- }
- if (($thisfile_mpeg_audio_lame['short_version'] == 'LAME3.90.') && !empty($thisfile_mpeg_audio_lame['preset_used_id'])) {
- // this may change if 3.90.4 ever comes out
- $thisfile_mpeg_audio_lame['short_version'] = 'LAME3.90.3';
- }
- // bytes $B8-$BB MusicLength
- $thisfile_mpeg_audio_lame['audio_bytes'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB8, 4));
- $ExpectedNumberOfAudioBytes = (($thisfile_mpeg_audio_lame['audio_bytes'] > 0) ? $thisfile_mpeg_audio_lame['audio_bytes'] : $thisfile_mpeg_audio['VBR_bytes']);
- // bytes $BC-$BD MusicCRC
- $thisfile_mpeg_audio_lame['music_crc'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xBC, 2));
- // bytes $BE-$BF CRC-16 of Info Tag
- $thisfile_mpeg_audio_lame['lame_tag_crc'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xBE, 2));
- // LAME CBR
- if ($thisfile_mpeg_audio_lame_raw['vbr_method'] == 1) {
- $thisfile_mpeg_audio['bitrate_mode'] = 'cbr';
- $thisfile_mpeg_audio['bitrate'] = self::ClosestStandardMP3Bitrate($thisfile_mpeg_audio['bitrate']);
- $info['audio']['bitrate'] = $thisfile_mpeg_audio['bitrate'];
- //if (empty($thisfile_mpeg_audio['bitrate']) || (!empty($thisfile_mpeg_audio_lame['bitrate_min']) && ($thisfile_mpeg_audio_lame['bitrate_min'] != 255))) {
- // $thisfile_mpeg_audio['bitrate'] = $thisfile_mpeg_audio_lame['bitrate_min'];
- //}
- }
- }
- }
- } else {
- // not Fraunhofer or Xing VBR methods, most likely CBR (but could be VBR with no header)
- $thisfile_mpeg_audio['bitrate_mode'] = 'cbr';
- if ($recursivesearch) {
- $thisfile_mpeg_audio['bitrate_mode'] = 'vbr';
- if ($this->RecursiveFrameScanning($offset, $nextframetestoffset, true)) {
- $recursivesearch = false;
- $thisfile_mpeg_audio['bitrate_mode'] = 'cbr';
- }
- if ($thisfile_mpeg_audio['bitrate_mode'] == 'vbr') {
- $info['warning'][] = 'VBR file with no VBR header. Bitrate values calculated from actual frame bitrates.';
- }
- }
- }
- }
- if (($ExpectedNumberOfAudioBytes > 0) && ($ExpectedNumberOfAudioBytes != ($info['avdataend'] - $info['avdataoffset']))) {
- if ($ExpectedNumberOfAudioBytes > ($info['avdataend'] - $info['avdataoffset'])) {
- if ($this->isDependencyFor('matroska') || $this->isDependencyFor('riff')) {
- // ignore, audio data is broken into chunks so will always be data "missing"
- }
- elseif (($ExpectedNumberOfAudioBytes - ($info['avdataend'] - $info['avdataoffset'])) == 1) {
- $this->warning('Last byte of data truncated (this is a known bug in Meracl ID3 Tag Writer before v1.3.5)');
- }
- else {
- $this->warning('Probable truncated file: expecting '.$ExpectedNumberOfAudioBytes.' bytes of audio data, only found '.($info['avdataend'] - $info['avdataoffset']).' (short by '.($ExpectedNumberOfAudioBytes - ($info['avdataend'] - $info['avdataoffset'])).' bytes)');
- }
- } else {
- if ((($info['avda…
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