diff options
Diffstat (limited to 'srcs/wordpress/wp-includes/ID3/module.audio.mp3.php')
| -rw-r--r-- | srcs/wordpress/wp-includes/ID3/module.audio.mp3.php | 2150 |
1 files changed, 2150 insertions, 0 deletions
diff --git a/srcs/wordpress/wp-includes/ID3/module.audio.mp3.php b/srcs/wordpress/wp-includes/ID3/module.audio.mp3.php new file mode 100644 index 0000000..4bd75a0 --- /dev/null +++ b/srcs/wordpress/wp-includes/ID3/module.audio.mp3.php @@ -0,0 +1,2150 @@ +<?php + +///////////////////////////////////////////////////////////////// +/// getID3() by James Heinrich <info@getid3.org> // +// available at https://github.com/JamesHeinrich/getID3 // +// or https://www.getid3.org // +// or http://getid3.sourceforge.net // +// see readme.txt for more details // +///////////////////////////////////////////////////////////////// +// // +// module.audio.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 +{ + /** + * Forces getID3() to scan the file byte-by-byte and log all the valid audio frame headers - extremely slow, + * unrecommended, but may provide data from otherwise-unusable files. + * + * @var bool + */ + public $allow_bruteforce = false; + + /** + * @return bool + */ + public function Analyze() { + $info = &$this->getid3->info; + + $initialOffset = $info['avdataoffset']; + + if (!$this->getOnlyMPEGaudioInfo($info['avdataoffset'])) { + if ($this->allow_bruteforce) { + $this->error('Rescanning file in BruteForce mode'); + $this->getOnlyMPEGaudioInfoBruteForce(); + } + } + + + if (isset($info['mpeg']['audio']['bitrate_mode'])) { + $info['audio']['bitrate_mode'] = strtolower($info['mpeg']['audio']['bitrate_mode']); + } + + if (((isset($info['id3v2']['headerlength']) && ($info['avdataoffset'] > $info['id3v2']['headerlength'])) || (!isset($info['id3v2']) && ($info['avdataoffset'] > 0) && ($info['avdataoffset'] != $initialOffset)))) { + + $synchoffsetwarning = 'Unknown data before synch '; + if (isset($info['id3v2']['headerlength'])) { + $synchoffsetwarning .= '(ID3v2 header ends at '.$info['id3v2']['headerlength'].', then '.($info['avdataoffset'] - $info['id3v2']['headerlength']).' bytes garbage, '; + } elseif ($initialOffset > 0) { + $synchoffsetwarning .= '(should be at '.$initialOffset.', '; + } else { + $synchoffsetwarning .= '(should be at beginning of file, '; + } + $synchoffsetwarning .= 'synch detected at '.$info['avdataoffset'].')'; + if (isset($info['audio']['bitrate_mode']) && ($info['audio']['bitrate_mode'] == 'cbr')) { + + if (!empty($info['id3v2']['headerlength']) && (($info['avdataoffset'] - $info['id3v2']['headerlength']) == $info['mpeg']['audio']['framelength'])) { + + $synchoffsetwarning .= '. This is a known problem with some versions of LAME (3.90-3.92) DLL in CBR mode.'; + $info['audio']['codec'] = 'LAME'; + $CurrentDataLAMEversionString = 'LAME3.'; + + } elseif (empty($info['id3v2']['headerlength']) && ($info['avdataoffset'] == $info['mpeg']['audio']['framelength'])) { + + $synchoffsetwarning .= '. This is a known problem with some versions of LAME (3.90 - 3.92) DLL in CBR mode.'; + $info['audio']['codec'] = 'LAME'; + $CurrentDataLAMEversionString = 'LAME3.'; + + } + + } + $this->warning($synchoffsetwarning); + + } + + if (isset($info['mpeg']['audio']['LAME'])) { + $info['audio']['codec'] = 'LAME'; + if (!empty($info['mpeg']['audio']['LAME']['long_version'])) { + $info['audio']['encoder'] = rtrim($info['mpeg']['audio']['LAME']['long_version'], "\x00"); + } elseif (!empty($info['mpeg']['audio']['LAME']['short_version'])) { + $info['audio']['encoder'] = rtrim($info['mpeg']['audio']['LAME']['short_version'], "\x00"); + } + } + + $CurrentDataLAMEversionString = (!empty($CurrentDataLAMEversionString) ? $CurrentDataLAMEversionString : (isset($info['audio']['encoder']) ? $info['audio']['encoder'] : '')); + if (!empty($CurrentDataLAMEversionString) && (substr($CurrentDataLAMEversionString, 0, 6) == 'LAME3.') && !preg_match('[0-9\)]', substr($CurrentDataLAMEversionString, -1))) { + // a version number of LAME that does not end with a number like "LAME3.92" + // or with a closing parenthesis like "LAME3.88 (alpha)" + // or a version of LAME with the LAMEtag-not-filled-in-DLL-mode bug (3.90-3.92) + + // not sure what the actual last frame length will be, but will be less than or equal to 1441 + $PossiblyLongerLAMEversion_FrameLength = 1441; + + // Not sure what version of LAME this is - look in padding of last frame for longer version string + $PossibleLAMEversionStringOffset = $info['avdataend'] - $PossiblyLongerLAMEversion_FrameLength; + $this->fseek($PossibleLAMEversionStringOffset); + $PossiblyLongerLAMEversion_Data = $this->fread($PossiblyLongerLAMEversion_FrameLength); + switch (substr($CurrentDataLAMEversionString, -1)) { + case 'a': + case 'b': + // "LAME3.94a" will have a longer version string of "LAME3.94 (alpha)" for example + // need to trim off "a" to match longer string + $CurrentDataLAMEversionString = substr($CurrentDataLAMEversionString, 0, -1); + break; + } + if (($PossiblyLongerLAMEversion_String = strstr($PossiblyLongerLAMEversion_Data, $CurrentDataLAMEversionString)) !== false) { + if (substr($PossiblyLongerLAMEversion_String, 0, strlen($CurrentDataLAMEversionString)) == $CurrentDataLAMEversionString) { + $PossiblyLongerLAMEversion_NewString = substr($PossiblyLongerLAMEversion_String, 0, strspn($PossiblyLongerLAMEversion_String, 'LAME0123456789., (abcdefghijklmnopqrstuvwxyzJFSOND)')); //"LAME3.90.3" "LAME3.87 (beta 1, Sep 27 2000)" "LAME3.88 (beta)" + if (empty($info['audio']['encoder']) || (strlen($PossiblyLongerLAMEversion_NewString) > strlen($info['audio']['encoder']))) { + $info['audio']['encoder'] = $PossiblyLongerLAMEversion_NewString; + } + } + } + } + if (!empty($info['audio']['encoder'])) { + $info['audio']['encoder'] = rtrim($info['audio']['encoder'], "\x00 "); + } + + switch (isset($info['mpeg']['audio']['layer']) ? $info['mpeg']['audio']['layer'] : '') { + case 1: + case 2: + $info['audio']['dataformat'] = 'mp'.$info['mpeg']['audio']['layer']; + break; + } + if (isset($info['fileformat']) && ($info['fileformat'] == 'mp3')) { + switch ($info['audio']['dataformat']) { + case 'mp1': + case 'mp2': + case 'mp3': + $info['fileformat'] = $info['audio']['dataformat']; + break; + + default: + $this->warning('Expecting [audio][dataformat] to be mp1/mp2/mp3 when fileformat == mp3, [audio][dataformat] actually "'.$info['audio']['dataformat'].'"'); + break; + } + } + + if (empty($info['fileformat'])) { + unset($info['fileformat']); + unset($info['audio']['bitrate_mode']); + unset($info['avdataoffset']); + unset($info['avdataend']); + return false; + } + + $info['mime_type'] = 'audio/mpeg'; + $info['audio']['lossless'] = false; + + // Calculate playtime + if (!isset($info['playtime_seconds']) && isset($info['audio']['bitrate']) && ($info['audio']['bitrate'] > 0)) { + // https://github.com/JamesHeinrich/getID3/issues/161 + // VBR header frame contains ~0.026s of silent audio data, but is not actually part of the original encoding and should be ignored + $xingVBRheaderFrameLength = ((isset($info['mpeg']['audio']['VBR_frames']) && isset($info['mpeg']['audio']['framelength'])) ? $info['mpeg']['audio']['framelength'] : 0); + + $info['playtime_seconds'] = ($info['avdataend'] - $info['avdataoffset'] - $xingVBRheaderFrameLength) * 8 / $info['audio']['bitrate']; + } + + $info['audio']['encoder_options'] = $this->GuessEncoderOptions(); + + return true; + } + + /** + * @return string + */ + public function GuessEncoderOptions() { + // shortcuts + $info = &$this->getid3->info; + $thisfile_mpeg_audio = array(); + $thisfile_mpeg_audio_lame = array(); + if (!empty($info['mpeg']['audio'])) { + $thisfile_mpeg_audio = &$info['mpeg']['audio']; + if (!empty($thisfile_mpeg_audio['LAME'])) { + $thisfile_mpeg_audio_lame = &$thisfile_mpeg_audio['LAME']; + } + } + + $encoder_options = ''; + static $NamedPresetBitrates = array(16, 24, 40, 56, 112, 128, 160, 192, 256); + + if (isset($thisfile_mpeg_audio['VBR_method']) && ($thisfile_mpeg_audio['VBR_method'] == 'Fraunhofer') && !empty($thisfile_mpeg_audio['VBR_quality'])) { + + $encoder_options = 'VBR q'.$thisfile_mpeg_audio['VBR_quality']; + + } elseif (!empty($thisfile_mpeg_audio_lame['preset_used']) && isset($thisfile_mpeg_audio_lame['preset_used_id']) && (!in_array($thisfile_mpeg_audio_lame['preset_used_id'], $NamedPresetBitrates))) { + + $encoder_options = $thisfile_mpeg_audio_lame['preset_used']; + + } elseif (!empty($thisfile_mpeg_audio_lame['vbr_quality'])) { + + static $KnownEncoderValues = array(); + if (empty($KnownEncoderValues)) { + + //$KnownEncoderValues[abrbitrate_minbitrate][vbr_quality][raw_vbr_method][raw_noise_shaping][raw_stereo_mode][ath_type][lowpass_frequency] = 'preset name'; + $KnownEncoderValues[0xFF][58][1][1][3][2][20500] = '--alt-preset insane'; // 3.90, 3.90.1, 3.92 + $KnownEncoderValues[0xFF][58][1][1][3][2][20600] = '--alt-preset insane'; // 3.90.2, 3.90.3, 3.91 + $KnownEncoderValues[0xFF][57][1][1][3][4][20500] = '--alt-preset insane'; // 3.94, 3.95 + $KnownEncoderValues['**'][78][3][2][3][2][19500] = '--alt-preset extreme'; // 3.90, 3.90.1, 3.92 + $KnownEncoderValues['**'][78][3][2][3][2][19600] = '--alt-preset extreme'; // 3.90.2, 3.91 + $KnownEncoderValues['**'][78][3][1][3][2][19600] = '--alt-preset extreme'; // 3.90.3 + $KnownEncoderValues['**'][78][4][2][3][2][19500] = '--alt-preset fast extreme'; // 3.90, 3.90.1, 3.92 + $KnownEncoderValues['**'][78][4][2][3][2][19600] = '--alt-preset fast extreme'; // 3.90.2, 3.90.3, 3.91 + $KnownEncoderValues['**'][78][3][2][3][4][19000] = '--alt-preset standard'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 + $KnownEncoderValues['**'][78][3][1][3][4][19000] = '--alt-preset standard'; // 3.90.3 + $KnownEncoderValues['**'][78][4][2][3][4][19000] = '--alt-preset fast standard'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 + $KnownEncoderValues['**'][78][4][1][3][4][19000] = '--alt-preset fast standard'; // 3.90.3 + $KnownEncoderValues['**'][88][4][1][3][3][19500] = '--r3mix'; // 3.90, 3.90.1, 3.92 + $KnownEncoderValues['**'][88][4][1][3][3][19600] = '--r3mix'; // 3.90.2, 3.90.3, 3.91 + $KnownEncoderValues['**'][67][4][1][3][4][18000] = '--r3mix'; // 3.94, 3.95 + $KnownEncoderValues['**'][68][3][2][3][4][18000] = '--alt-preset medium'; // 3.90.3 + $KnownEncoderValues['**'][68][4][2][3][4][18000] = '--alt-preset fast medium'; // 3.90.3 + + $KnownEncoderValues[0xFF][99][1][1][1][2][0] = '--preset studio'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 + $KnownEncoderValues[0xFF][58][2][1][3][2][20600] = '--preset studio'; // 3.90.3, 3.93.1 + $KnownEncoderValues[0xFF][58][2][1][3][2][20500] = '--preset studio'; // 3.93 + $KnownEncoderValues[0xFF][57][2][1][3][4][20500] = '--preset studio'; // 3.94, 3.95 + $KnownEncoderValues[0xC0][88][1][1][1][2][0] = '--preset cd'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 + $KnownEncoderValues[0xC0][58][2][2][3][2][19600] = '--preset cd'; // 3.90.3, 3.93.1 + $KnownEncoderValues[0xC0][58][2][2][3][2][19500] = '--preset cd'; // 3.93 + $KnownEncoderValues[0xC0][57][2][1][3][4][19500] = '--preset cd'; // 3.94, 3.95 + $KnownEncoderValues[0xA0][78][1][1][3][2][18000] = '--preset hifi'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 + $KnownEncoderValues[0xA0][58][2][2][3][2][18000] = '--preset hifi'; // 3.90.3, 3.93, 3.93.1 + $KnownEncoderValues[0xA0][57][2][1][3][4][18000] = '--preset hifi'; // 3.94, 3.95 + $KnownEncoderValues[0x80][67][1][1][3][2][18000] = '--preset tape'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 + $KnownEncoderValues[0x80][67][1][1][3][2][15000] = '--preset radio'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 + $KnownEncoderValues[0x70][67][1][1][3][2][15000] = '--preset fm'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 + $KnownEncoderValues[0x70][58][2][2][3][2][16000] = '--preset tape/radio/fm'; // 3.90.3, 3.93, 3.93.1 + $KnownEncoderValues[0x70][57][2][1][3][4][16000] = '--preset tape/radio/fm'; // 3.94, 3.95 + $KnownEncoderValues[0x38][58][2][2][0][2][10000] = '--preset voice'; // 3.90.3, 3.93, 3.93.1 + $KnownEncoderValues[0x38][57][2][1][0][4][15000] = '--preset voice'; // 3.94, 3.95 + $KnownEncoderValues[0x38][57][2][1][0][4][16000] = '--preset voice'; // 3.94a14 + $KnownEncoderValues[0x28][65][1][1][0][2][7500] = '--preset mw-us'; // 3.90, 3.90.1, 3.92 + $KnownEncoderValues[0x28][65][1][1][0][2][7600] = '--preset mw-us'; // 3.90.2, 3.91 + $KnownEncoderValues[0x28][58][2][2][0][2][7000] = '--preset mw-us'; // 3.90.3, 3.93, 3.93.1 + $KnownEncoderValues[0x28][57][2][1][0][4][10500] = '--preset mw-us'; // 3.94, 3.95 + $KnownEncoderValues[0x28][57][2][1][0][4][11200] = '--preset mw-us'; // 3.94a14 + $KnownEncoderValues[0x28][57][2][1][0][4][8800] = '--preset mw-us'; // 3.94a15 + $KnownEncoderValues[0x18][58][2][2][0][2][4000] = '--preset phon+/lw/mw-eu/sw'; // 3.90.3, 3.93.1 + $KnownEncoderValues[0x18][58][2][2][0][2][3900] = '--preset phon+/lw/mw-eu/sw'; // 3.93 + $KnownEncoderValues[0x18][57][2][1][0][4][5900] = '--preset phon+/lw/mw-eu/sw'; // 3.94, 3.95 + $KnownEncoderValues[0x18][57][2][1][0][4][6200] = '--preset phon+/lw/mw-eu/sw'; // 3.94a14 + $KnownEncoderValues[0x18][57][2][1][0][4][3200] = '--preset phon+/lw/mw-eu/sw'; // 3.94a15 + $KnownEncoderValues[0x10][58][2][2][0][2][3800] = '--preset phone'; // 3.90.3, 3.93.1 + $KnownEncoderValues[0x10][58][2][2][0][2][3700] = '--preset phone'; // 3.93 + $KnownEncoderValues[0x10][57][2][1][0][4][5600] = '--preset phone'; // 3.94, 3.95 + } + + if (isset($KnownEncoderValues[$thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate']][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']])) { + + $encoder_options = $KnownEncoderValues[$thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate']][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']]; + + } elseif (isset($KnownEncoderValues['**'][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']])) { + + $encoder_options = $KnownEncoderValues['**'][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']]; + + } elseif ($info['audio']['bitrate_mode'] == 'vbr') { + + // http://gabriel.mp3-tech.org/mp3infotag.html + // int Quality = (100 - 10 * gfp->VBR_q - gfp->quality)h + + + $LAME_V_value = 10 - ceil($thisfile_mpeg_audio_lame['vbr_quality'] / 10); + $LAME_q_value = 100 - $thisfile_mpeg_audio_lame['vbr_quality'] - ($LAME_V_value * 10); + $encoder_options = '-V'.$LAME_V_value.' -q'.$LAME_q_value; + + } elseif ($info['audio']['bitrate_mode'] == 'cbr') { + + $encoder_options = strtoupper($info['audio']['bitrate_mode']).ceil($info['audio']['bitrate'] / 1000); + + } else { + + $encoder_options = strtoupper($info['audio']['bitrate_mode']); + + } + + } elseif (!empty($thisfile_mpeg_audio_lame['bitrate_abr'])) { + + $encoder_options = 'ABR'.$thisfile_mpeg_audio_lame['bitrate_abr']; + + } elseif (!empty($info['audio']['bitrate'])) { + + if ($info['audio']['bitrate_mode'] == 'cbr') { + $encoder_options = strtoupper($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; + } + + /** + * @param int $offset + * @param array $info + * @param bool $recursivesearch + * @param bool $ScanAsCBR + * @param bool $FastMPEGheaderScan + * + * @return bool + */ + public function decodeMPEGaudioHeader($offset, &$info, $recursivesearch=true, $ScanAsCBR=false, $FastMPEGheaderScan=false) { + static $MPEGaudioVersionLookup; + static $MPEGaudioLayerLookup; + static $MPEGaudioBitrateLookup; + static $MPEGaudioFrequencyLookup; + static $MPEGaudioChannelModeLookup; + static $MPEGaudioModeExtensionLookup; + static $MPEGaudioEmphasisLookup; + if (empty($MPEGaudioVersionLookup)) { + $MPEGaudioVersionLookup = self::MPEGaudioVersionArray(); + $MPEGaudioLayerLookup = self::MPEGaudioLayerArray(); + $MPEGaudioBitrateLookup = self::MPEGaudioBitrateArray(); + $MPEGaudioFrequencyLookup = self::MPEGaudioFrequencyArray(); + $MPEGaudioChannelModeLookup = self::MPEGaudioChannelModeArray(); + $MPEGaudioModeExtensionLookup = self::MPEGaudioModeExtensionArray(); + $MPEGaudioEmphasisLookup = self::MPEGaudioEmphasisArray(); + } + + if ($this->fseek($offset) != 0) { + $this->error('decodeMPEGaudioHeader() failed to seek to next offset at '.$offset); + return false; + } + //$headerstring = $this->fread(1441); // worst-case max length = 32kHz @ 320kbps layer 3 = 1441 bytes/frame + $headerstring = $this->fread(226); // LAME header at offset 36 + 190 bytes of Xing/LAME data + + // MP3 audio frame structure: + // $aa $aa $aa $aa [$bb $bb] $cc... + // where $aa..$aa is the four-byte mpeg-audio header (below) + // $bb $bb is the optional 2-byte CRC + // and $cc... is the audio data + + $head4 = substr($headerstring, 0, 4); + $head4_key = getid3_lib::PrintHexBytes($head4, true, false, false); + static $MPEGaudioHeaderDecodeCache = array(); + if (isset($MPEGaudioHeaderDecodeCache[$head4_key])) { + $MPEGheaderRawArray = $MPEGaudioHeaderDecodeCache[$head4_key]; + } else { + $MPEGheaderRawArray = self::MPEGaudioHeaderDecode($head4); + $MPEGaudioHeaderDecodeCache[$head4_key] = $MPEGheaderRawArray; + } + + static $MPEGaudioHeaderValidCache = array(); + if (!isset($MPEGaudioHeaderValidCache[$head4_key])) { // Not in cache + //$MPEGaudioHeaderValidCache[$head4_key] = self::MPEGaudioHeaderValid($MPEGheaderRawArray, false, true); // allow badly-formatted freeformat (from LAME 3.90 - 3.93.1) + $MPEGaudioHeaderValidCache[$head4_key] = self::MPEGaudioHeaderValid($MPEGheaderRawArray, false, false); + } + + // shortcut + if (!isset($info['mpeg']['audio'])) { + $info['mpeg']['audio'] = array(); + } + $thisfile_mpeg_audio = &$info['mpeg']['audio']; + + if ($MPEGaudioHeaderValidCache[$head4_key]) { + $thisfile_mpeg_audio['raw'] = $MPEGheaderRawArray; + } else { + $this->error('Invalid MPEG audio header ('.getid3_lib::PrintHexBytes($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 + $this->warning('Invalid bitrate index (15), this is a known bug in free-format MP3s encoded by LAME v3.90 - 3.93.1'); + $thisfile_mpeg_audio['raw']['bitrate'] = 0; + } + $thisfile_mpeg_audio['padding'] = (bool) $thisfile_mpeg_audio['raw']['padding']; + $thisfile_mpeg_audio['bitrate'] = $MPEGaudioBitrateLookup[$thisfile_mpeg_audio['version']][$thisfile_mpeg_audio['layer']][$thisfile_mpeg_audio['raw']['bitrate']]; + + if (($thisfile_mpeg_audio['bitrate'] == 'free') && ($offset == $info['avdataoffset'])) { + // only skip multiple frame check if free-format bitstream found at beginning of file + // otherwise is quite possibly simply corrupted data + $recursivesearch = false; + } + + // For Layer 2 there are some combinations of bitrate and mode which are not allowed. + if (!$FastMPEGheaderScan && ($thisfile_mpeg_audio['layer'] == '2')) { + + $info['audio']['dataformat'] = 'mp2'; + switch ($thisfile_mpeg_audio['channelmode']) { + + case 'mono': + if (($thisfile_mpeg_audio['bitrate'] == 'free') || ($thisfile_mpeg_audio['bitrate'] <= 192000)) { + // these are ok + } else { + $this->error($thisfile_mpeg_audio['bitrate'].'kbps not allowed in Layer 2, '.$thisfile_mpeg_audio['channelmode'].'.'); + return false; + } + break; + + case 'stereo': + case 'joint stereo': + case 'dual channel': + if (($thisfile_mpeg_audio['bitrate'] == 'free') || ($thisfile_mpeg_audio['bitrate'] == 64000) || ($thisfile_mpeg_audio['bitrate'] >= 96000)) { + // these are ok + } else { + $this->error(intval(round($thisfile_mpeg_audio['bitrate'] / 1000)).'kbps not allowed in Layer 2, '.$thisfile_mpeg_audio['channelmode'].'.'); + return false; + } + break; + + } + + } + + + if ($info['audio']['sample_rate'] > 0) { + $thisfile_mpeg_audio['framelength'] = self::MPEGaudioFrameLength($thisfile_mpeg_audio['bitrate'], $thisfile_mpeg_audio['version'], $thisfile_mpeg_audio['layer'], (int) $thisfile_mpeg_audio['padding'], $info['audio']['sample_rate']); + } + + $nextframetestoffset = $offset + 1; + if ($thisfile_mpeg_audio['bitrate'] != 'free') { + + $info['audio']['bitrate'] = $thisfile_mpeg_audio['bitrate']; + + if (isset($thisfile_mpeg_audio['framelength'])) { + $nextframetestoffset = $offset + $thisfile_mpeg_audio['framelength']; + } else { + $this->error('Frame at offset('.$offset.') is has an invalid frame length.'); + return false; + } + + } + + $ExpectedNumberOfAudioBytes = 0; + + //////////////////////////////////////////////////////////////////////////////////// + // Variable-bitrate headers + + if (substr($headerstring, 4 + 32, 4) == 'VBRI') { + // Fraunhofer VBR header is hardcoded 'VBRI' at offset 0x24 (36) + // specs taken from http://minnie.tuhs.org/pipermail/mp3encoder/2001-January/001800.html + + $thisfile_mpeg_audio['bitrate_mode'] = 'vbr'; + $thisfile_mpeg_audio['VBR_method'] = 'Fraunhofer'; + $info['audio']['codec'] = 'Fraunhofer'; + + $SideInfoData = substr($headerstring, 4 + 2, 32); + + $FraunhoferVBROffset = 36; + + $thisfile_mpeg_audio['VBR_encoder_version'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 4, 2)); // VbriVersion + $thisfile_mpeg_audio['VBR_encoder_delay'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 6, 2)); // VbriDelay + $thisfile_mpeg_audio['VBR_quality'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 8, 2)); // VbriQuality + $thisfile_mpeg_audio['VBR_bytes'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 10, 4)); // VbriStreamBytes + $thisfile_mpeg_audio['VBR_frames'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 14, 4)); // VbriStreamFrames + $thisfile_mpeg_audio['VBR_seek_offsets'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 18, 2)); // VbriTableSize + $thisfile_mpeg_audio['VBR_seek_scale'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 20, 2)); // VbriTableScale + $thisfile_mpeg_audio['VBR_entry_bytes'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 22, 2)); // VbriEntryBytes + $thisfile_mpeg_audio['VBR_entry_frames'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 24, 2)); // VbriEntryFrames + + $ExpectedNumberOfAudioBytes = $thisfile_mpeg_audio['VBR_bytes']; + + $previousbyteoffset = $offset; + for ($i = 0; $i < $thisfile_mpeg_audio['VBR_seek_offsets']; $i++) { + $Fraunhofer_OffsetN = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset, $thisfile_mpeg_audio['VBR_entry_bytes'])); + $FraunhoferVBROffset += $thisfile_mpeg_audio['VBR_entry_bytes']; + $thisfile_mpeg_audio['VBR_offsets_relative'][$i] = ($Fraunhofer_OffsetN * $thisfile_mpeg_audio['VBR_seek_scale']); + $thisfile_mpeg_audio['VBR_offsets_absolute'][$i] = ($Fraunhofer_OffsetN * $thisfile_mpeg_audio['VBR_seek_scale']) + $previousbyteoffset; + $previousbyteoffset += $Fraunhofer_OffsetN; + } + + + } else { + + // Xing VBR header is hardcoded 'Xing' at a offset 0x0D (13), 0x15 (21) or 0x24 (36) + // depending on MPEG layer and number of channels + + $VBRidOffset = self::XingVBRidOffset($thisfile_mpeg_audio['version'], $thisfile_mpeg_audio['channelmode']); + $SideInfoData = substr($headerstring, 4 + 2, $VBRidOffset - 4); + + if ((substr($headerstring, $VBRidOffset, strlen('Xing')) == 'Xing') || (substr($headerstring, $VBRidOffset, strlen('Info')) == 'Info')) { + // 'Xing' is traditional Xing VBR frame + // 'Info' is LAME-encoded CBR (This was done to avoid CBR files to be recognized as traditional Xing VBR files by some decoders.) + // 'Info' *can* legally be used to specify a VBR file as well, however. + + // http://www.multiweb.cz/twoinches/MP3inside.htm + //00..03 = "Xing" or "Info" + //04..07 = Flags: + // 0x01 Frames Flag set if value for number of frames in file is stored + // 0x02 Bytes Flag set if value for filesize in bytes is stored + // 0x04 TOC Flag set if values for TOC are stored + // 0x08 VBR Scale Flag set if values for VBR scale is stored + //08..11 Frames: Number of frames in file (including the first Xing/Info one) + //12..15 Bytes: File length in Bytes + //16..115 TOC (Table of Contents): + // Contains of 100 indexes (one Byte length) for easier lookup in file. Approximately solves problem with moving inside file. + // Each Byte has a value according this formula: + // (TOC[i] / 256) * fileLenInBytes + // So if song lasts eg. 240 sec. and you want to jump to 60. sec. (and file is 5 000 000 Bytes length) you can use: + // TOC[(60/240)*100] = TOC[25] + // and corresponding Byte in file is then approximately at: + // (TOC[25]/256) * 5000000 + //116..119 VBR Scale + + + // should be safe to leave this at 'vbr' and let it be overriden to 'cbr' if a CBR preset/mode is used by LAME +// if (substr($headerstring, $VBRidOffset, strlen('Info')) == 'Xing') { + $thisfile_mpeg_audio['bitrate_mode'] = 'vbr'; + $thisfile_mpeg_audio['VBR_method'] = 'Xing'; +// } else { +// $ScanAsCBR = true; +// $thisfile_mpeg_audio['bitrate_mode'] = 'cbr'; +// } + + $thisfile_mpeg_audio['xing_flags_raw'] = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset + 4, 4)); + + $thisfile_mpeg_audio['xing_flags']['frames'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000001); + $thisfile_mpeg_audio['xing_flags']['bytes'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000002); + $thisfile_mpeg_audio['xing_flags']['toc'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000004); + $thisfile_mpeg_audio['xing_flags']['vbr_scale'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000008); + + if ($thisfile_mpeg_audio['xing_flags']['frames']) { + $thisfile_mpeg_audio['VBR_frames'] = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset + 8, 4)); + //$thisfile_mpeg_audio['VBR_frames']--; // don't count header Xing/Info frame + } + if ($thisfile_mpeg_audio['xing_flags']['bytes']) { + $thisfile_mpeg_audio['VBR_bytes'] = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset + 12, 4)); + } + + //if (($thisfile_mpeg_audio['bitrate'] == 'free') && !empty($thisfile_mpeg_audio['VBR_frames']) && !empty($thisfile_mpeg_audio['VBR_bytes'])) { + //if (!empty($thisfile_mpeg_audio['VBR_frames']) && !empty($thisfile_mpeg_audio['VBR_bytes'])) { + if (!empty($thisfile_mpeg_audio['VBR_frames'])) { + $used_filesize = 0; + if (!empty($thisfile_mpeg_audio['VBR_bytes'])) { + $used_filesize = $thisfile_mpeg_audio['VBR_bytes']; + } elseif (!empty($info['filesize'])) { + $used_filesize = $info['filesize']; + $used_filesize -= (isset($info['id3v2']['headerlength']) ? intval($info['id3v2']['headerlength']) : 0); + $used_filesize -= (isset($info['id3v1']) ? 128 : 0); + $used_filesize -= (isset($info['tag_offset_end']) ? $info['tag_offset_end'] - $info['tag_offset_start'] : 0); + $this->warning('MP3.Xing header missing VBR_bytes, assuming MPEG audio portion of file is '.number_format($used_filesize).' bytes'); + } + + $framelengthfloat = $used_filesize / $thisfile_mpeg_audio['VBR_frames']; + + if ($thisfile_mpeg_audio['layer'] == '1') { + // BitRate = (((FrameLengthInBytes / 4) - Padding) * SampleRate) / 12 + //$info['audio']['bitrate'] = ((($framelengthfloat / 4) - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 12; + $info['audio']['bitrate'] = ($framelengthfloat / 4) * $thisfile_mpeg_audio['sample_rate'] * (2 / $info['audio']['channels']) / 12; + } else { + // Bitrate = ((FrameLengthInBytes - Padding) * SampleRate) / 144 + //$info['audio']['bitrate'] = (($framelengthfloat - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 144; + $info['audio']['bitrate'] = $framelengthfloat * $thisfile_mpeg_audio['sample_rate'] * (2 / $info['audio']['channels']) / 144; + } + $thisfile_mpeg_audio['framelength'] = floor($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::LittleEndian2 |