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Diffstat (limited to 'getid3/module.audio.mp3.php')
| -rw-r--r-- | getid3/module.audio.mp3.php | 2022 |
1 files changed, 0 insertions, 2022 deletions
diff --git a/getid3/module.audio.mp3.php b/getid3/module.audio.mp3.php deleted file mode 100644 index ac9a273..0000000 --- a/getid3/module.audio.mp3.php +++ /dev/null @@ -1,2022 +0,0 @@ -<?php -///////////////////////////////////////////////////////////////// -/// getID3() by James Heinrich <info@getid3.org> // -// available at http://getid3.sourceforge.net // -// or http://www.getid3.org // -///////////////////////////////////////////////////////////////// -// 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 -{ - - var $allow_bruteforce = false; // forces getID3() to scan the file byte-by-byte and log all the valid audio frame headers - extremely slow, unrecommended, but may provide data from otherwise-unusuable files - - function getid3_mp3(&$fd, &$ThisFileInfo) { - - if (!$this->getOnlyMPEGaudioInfo($fd, $ThisFileInfo, $ThisFileInfo['avdataoffset'])) { - if ($this->allow_bruteforce) { - $ThisFileInfo['error'][] = 'Rescanning file in BruteForce mode'; - $this->getOnlyMPEGaudioInfoBruteForce($fd, $ThisFileInfo); - } - } - - - if (isset($ThisFileInfo['mpeg']['audio']['bitrate_mode'])) { - $ThisFileInfo['audio']['bitrate_mode'] = strtolower($ThisFileInfo['mpeg']['audio']['bitrate_mode']); - } - - if (((isset($ThisFileInfo['id3v2']['headerlength']) && ($ThisFileInfo['avdataoffset'] > $ThisFileInfo['id3v2']['headerlength'])) || (!isset($ThisFileInfo['id3v2']) && ($ThisFileInfo['avdataoffset'] > 0)))) { - - $synchoffsetwarning = 'Unknown data before synch '; - if (isset($ThisFileInfo['id3v2']['headerlength'])) { - $synchoffsetwarning .= '(ID3v2 header ends at '.$ThisFileInfo['id3v2']['headerlength'].', then '.($ThisFileInfo['avdataoffset'] - $ThisFileInfo['id3v2']['headerlength']).' bytes garbage, '; - } else { - $synchoffsetwarning .= '(should be at beginning of file, '; - } - $synchoffsetwarning .= 'synch detected at '.$ThisFileInfo['avdataoffset'].')'; - if (@$ThisFileInfo['audio']['bitrate_mode'] == 'cbr') { - - if (!empty($ThisFileInfo['id3v2']['headerlength']) && (($ThisFileInfo['avdataoffset'] - $ThisFileInfo['id3v2']['headerlength']) == $ThisFileInfo['mpeg']['audio']['framelength'])) { - - $synchoffsetwarning .= '. This is a known problem with some versions of LAME (3.90-3.92) DLL in CBR mode.'; - $ThisFileInfo['audio']['codec'] = 'LAME'; - $CurrentDataLAMEversionString = 'LAME3.'; - - } elseif (empty($ThisFileInfo['id3v2']['headerlength']) && ($ThisFileInfo['avdataoffset'] == $ThisFileInfo['mpeg']['audio']['framelength'])) { - - $synchoffsetwarning .= '. This is a known problem with some versions of LAME (3.90 - 3.92) DLL in CBR mode.'; - $ThisFileInfo['audio']['codec'] = 'LAME'; - $CurrentDataLAMEversionString = 'LAME3.'; - - } - - } - $ThisFileInfo['warning'][] = $synchoffsetwarning; - - } - - if (isset($ThisFileInfo['mpeg']['audio']['LAME'])) { - $ThisFileInfo['audio']['codec'] = 'LAME'; - if (!empty($ThisFileInfo['mpeg']['audio']['LAME']['long_version'])) { - $ThisFileInfo['audio']['encoder'] = rtrim($ThisFileInfo['mpeg']['audio']['LAME']['long_version'], "\x00"); - } elseif (!empty($ThisFileInfo['mpeg']['audio']['LAME']['short_version'])) { - $ThisFileInfo['audio']['encoder'] = rtrim($ThisFileInfo['mpeg']['audio']['LAME']['short_version'], "\x00"); - } - } - - $CurrentDataLAMEversionString = (!empty($CurrentDataLAMEversionString) ? $CurrentDataLAMEversionString : @$ThisFileInfo['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 = $ThisFileInfo['avdataend'] - $PossiblyLongerLAMEversion_FrameLength; - fseek($fd, $PossibleLAMEversionStringOffset); - $PossiblyLongerLAMEversion_Data = fread($fd, $PossiblyLongerLAMEversion_FrameLength); - switch (substr($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($PossiblyLongerLAMEversion_String, 'LAME0123456789., (abcdefghijklmnopqrstuvwxyzJFSOND)')); //"LAME3.90.3" "LAME3.87 (beta 1, Sep 27 2000)" "LAME3.88 (beta)" - if (strlen($PossiblyLongerLAMEversion_NewString) > strlen(@$ThisFileInfo['audio']['encoder'])) { - $ThisFileInfo['audio']['encoder'] = $PossiblyLongerLAMEversion_NewString; - } - } - } - } - if (!empty($ThisFileInfo['audio']['encoder'])) { - $ThisFileInfo['audio']['encoder'] = rtrim($ThisFileInfo['audio']['encoder'], "\x00 "); - } - - switch (@$ThisFileInfo['mpeg']['audio']['layer']) { - case 1: - case 2: - $ThisFileInfo['audio']['dataformat'] = 'mp'.$ThisFileInfo['mpeg']['audio']['layer']; - break; - } - if (@$ThisFileInfo['fileformat'] == 'mp3') { - switch ($ThisFileInfo['audio']['dataformat']) { - case 'mp1': - case 'mp2': - case 'mp3': - $ThisFileInfo['fileformat'] = $ThisFileInfo['audio']['dataformat']; - break; - - default: - $ThisFileInfo['warning'][] = 'Expecting [audio][dataformat] to be mp1/mp2/mp3 when fileformat == mp3, [audio][dataformat] actually "'.$ThisFileInfo['audio']['dataformat'].'"'; - break; - } - } - - if (empty($ThisFileInfo['fileformat'])) { - unset($ThisFileInfo['fileformat']); - unset($ThisFileInfo['audio']['bitrate_mode']); - unset($ThisFileInfo['avdataoffset']); - unset($ThisFileInfo['avdataend']); - return false; - } - - $ThisFileInfo['mime_type'] = 'audio/mpeg'; - $ThisFileInfo['audio']['lossless'] = false; - - // Calculate playtime - if (!isset($ThisFileInfo['playtime_seconds']) && isset($ThisFileInfo['audio']['bitrate']) && ($ThisFileInfo['audio']['bitrate'] > 0)) { - $ThisFileInfo['playtime_seconds'] = ($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8 / $ThisFileInfo['audio']['bitrate']; - } - - $ThisFileInfo['audio']['encoder_options'] = $this->GuessEncoderOptions($ThisFileInfo); - - return true; - } - - - function GuessEncoderOptions(&$ThisFileInfo) { - // shortcuts - if (!empty($ThisFileInfo['mpeg']['audio'])) { - $thisfile_mpeg_audio = &$ThisFileInfo['mpeg']['audio']; - if (!empty($thisfile_mpeg_audio['LAME'])) { - $thisfile_mpeg_audio_lame = &$thisfile_mpeg_audio['LAME']; - } - } - - $encoder_options = ''; - static $NamedPresetBitrates = array(16, 24, 40, 56, 112, 128, 160, 192, 256); - - if ((@$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']][$thisfile_mpeg_audio_lame['lowpass_frequency']]; - - } elseif ($ThisFileInfo['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'.$LAME_q_value; - - } elseif ($ThisFileInfo['audio']['bitrate_mode'] == 'cbr') { - - $encoder_options = strtoupper($ThisFileInfo['audio']['bitrate_mode']).ceil($ThisFileInfo['audio']['bitrate'] / 1000); - - } else { - - $encoder_options = strtoupper($ThisFileInfo['audio']['bitrate_mode']); - - } - - } elseif (!empty($thisfile_mpeg_audio_lame['bitrate_abr'])) { - - $encoder_options = 'ABR'.$thisfile_mpeg_audio_lame['bitrate_abr']; - - } elseif (!empty($ThisFileInfo['audio']['bitrate'])) { - - if ($ThisFileInfo['audio']['bitrate_mode'] == 'cbr') { - $encoder_options = strtoupper($ThisFileInfo['audio']['bitrate_mode']).ceil($ThisFileInfo['audio']['bitrate'] / 1000); - } else { - $encoder_options = strtoupper($ThisFileInfo['audio']['bitrate_mode']); - } - - } - if (!empty($thisfile_mpeg_audio_lame['bitrate_min'])) { - $encoder_options .= ' -b'.$thisfile_mpeg_audio_lame['bitrate_min']; - } - - if (@$thisfile_mpeg_audio_lame['encoding_flags']['nogap_prev'] || @$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($encoder_options) && !empty($ThisFileInfo['audio']['bitrate']) && !empty($ThisFileInfo['audio']['bitrate_mode'])) { - //$encoder_options = strtoupper($ThisFileInfo['audio']['bitrate_mode']).ceil($ThisFileInfo['audio']['bitrate'] / 1000); - $encoder_options = strtoupper($ThisFileInfo['audio']['bitrate_mode']); - } - - return $encoder_options; - } - - - function decodeMPEGaudioHeader($fd, $offset, &$ThisFileInfo, $recursivesearch=true, $ScanAsCBR=false, $FastMPEGheaderScan=false) { - - static $MPEGaudioVersionLookup; - static $MPEGaudioLayerLookup; - static $MPEGaudioBitrateLookup; - static $MPEGaudioFrequencyLookup; - static $MPEGaudioChannelModeLookup; - static $MPEGaudioModeExtensionLookup; - static $MPEGaudioEmphasisLookup; - if (empty($MPEGaudioVersionLookup)) { - $MPEGaudioVersionLookup = getid3_mp3::MPEGaudioVersionArray(); - $MPEGaudioLayerLookup = getid3_mp3::MPEGaudioLayerArray(); - $MPEGaudioBitrateLookup = getid3_mp3::MPEGaudioBitrateArray(); - $MPEGaudioFrequencyLookup = getid3_mp3::MPEGaudioFrequencyArray(); - $MPEGaudioChannelModeLookup = getid3_mp3::MPEGaudioChannelModeArray(); - $MPEGaudioModeExtensionLookup = getid3_mp3::MPEGaudioModeExtensionArray(); - $MPEGaudioEmphasisLookup = getid3_mp3::MPEGaudioEmphasisArray(); - } - - if ($offset >= $ThisFileInfo['avdataend']) { - $ThisFileInfo['error'][] = 'end of file encounter looking for MPEG synch'; - return false; - } - fseek($fd, $offset, SEEK_SET); - //$headerstring = fread($fd, 1441); // worst-case max length = 32kHz @ 320kbps layer 3 = 1441 bytes/frame - $headerstring = fread($fd, 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 { - $MPEGheaderRawArray = getid3_mp3::MPEGaudioHeaderDecode($head4); - $MPEGaudioHeaderDecodeCache[$head4] = $MPEGheaderRawArray; - } - - static $MPEGaudioHeaderValidCache = array(); - - // Not in cache - if (!isset($MPEGaudioHeaderValidCache[$head4])) { - //$MPEGaudioHeaderValidCache[$head4] = getid3_mp3::MPEGaudioHeaderValid($MPEGheaderRawArray, false, true); // allow badly-formatted freeformat (from LAME 3.90 - 3.93.1) - $MPEGaudioHeaderValidCache[$head4] = getid3_mp3::MPEGaudioHeaderValid($MPEGheaderRawArray, false, false); - } - - // shortcut - if (!isset($ThisFileInfo['mpeg']['audio'])) { - $ThisFileInfo['mpeg']['audio'] = array(); - } - $thisfile_mpeg_audio = &$ThisFileInfo['mpeg']['audio']; - - - if ($MPEGaudioHeaderValidCache[$head4]) { - $thisfile_mpeg_audio['raw'] = $MPEGheaderRawArray; - } else { - $ThisFileInfo['error'][] = 'Invalid MPEG audio header at offset '.$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']]; - - $ThisFileInfo['audio']['channels'] = $thisfile_mpeg_audio['channels']; - $ThisFileInfo['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 - $ThisFileInfo['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 == $ThisFileInfo['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')) { - - $ThisFileInfo['audio']['dataformat'] = 'mp2'; - switch ($thisfile_mpeg_audio['channelmode']) { - - case 'mono': - if (($thisfile_mpeg_audio['bitrate'] == 'free') || ($thisfile_mpeg_audio['bitrate'] <= 192000)) { - // these are ok - } else { - $ThisFileInfo['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 { - $ThisFileInfo['error'][] = intval(round($thisfile_mpeg_audio['bitrate'] / 1000)).'kbps not allowed in Layer 2, '.$thisfile_mpeg_audio['channelmode'].'.'; - return false; - } - break; - - } - - } - - - if ($ThisFileInfo['audio']['sample_rate'] > 0) { - $thisfile_mpeg_audio['framelength'] = getid3_mp3::MPEGaudioFrameLength($thisfile_mpeg_audio['bitrate'], $thisfile_mpeg_audio['version'], $thisfile_mpeg_audio['layer'], (int) $thisfile_mpeg_audio['padding'], $ThisFileInfo['audio']['sample_rate']); - } - - $nextframetestoffset = $offset + 1; - if ($thisfile_mpeg_audio['bitrate'] != 'free') { - - $ThisFileInfo['audio']['bitrate'] = $thisfile_mpeg_audio['bitrate']; - - if (isset($thisfile_mpeg_audio['framelength'])) { - $nextframetestoffset = $offset + $thisfile_mpeg_audio['framelength']; - } else { - $ThisFileInfo['error'][] = 'Frame at offset('.$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'; - $ThisFileInfo['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 - - $VBRidOffset = getid3_mp3::XingVBRidOffset($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 - //$ThisFileInfo['audio']['bitrate'] = ((($framelengthfloat / 4) - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 12; - $ThisFileInfo['audio']['bitrate'] = ($framelengthfloat / 4) * $thisfile_mpeg_audio['sample_rate'] * (2 / $ThisFileInfo['audio']['channels']) / 12; - } else { - // Bitrate = ((FrameLengthInBytes - Padding) * SampleRate) / 144 - //$ThisFileInfo['audio']['bitrate'] = (($framelengthfloat - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 144; - $ThisFileInfo['audio']['bitrate'] = $framelengthfloat * $thisfile_mpeg_audio['sample_rate'] * (2 / $ThisFileInfo['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; - $thisfile_mpeg_audio_lame['vbr_method'] = getid3_mp3::LAMEvbrMethodLookup($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'])) { - $ThisFileInfo['replay_gain']['track']['peak'] = $thisfile_mpeg_audio_lame_RGAD['peak_amplitude']; - } - $ThisFileInfo['replay_gain']['track']['originator'] = $thisfile_mpeg_audio_lame_RGAD_track['originator']; - $ThisFileInfo['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'])) { - $ThisFileInfo['replay_gain']['album']['peak'] = $thisfile_mpeg_audio_lame_RGAD['peak_amplitude']; - } - $ThisFileInfo['replay_gain']['album']['originator'] = $thisfile_mpeg_audio_lame_RGAD_album['originator']; - $ThisFileInfo['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']; - $thisfile_mpeg_audio_lame['stereo_mode'] = getid3_mp3::LAMEmiscStereoModeLookup($thisfile_mpeg_audio_lame_raw['stereo_mode']); - $thisfile_mpeg_audio_lame['not_optimal_quality'] = (bool) $thisfile_mpeg_audio_lame_raw['not_optimal_quality']; - $thisfile_mpeg_audio_lame['source_sample_freq'] = getid3_mp3::LAMEmiscSourceSampleFrequencyLookup($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); - $thisfile_mpeg_audio_lame['surround_info'] = getid3_mp3::LAMEsurroundInfoLookup($thisfile_mpeg_audio_lame_raw['surround_info']); - $thisfile_mpeg_audio_lame['preset_used_id'] = ($PresetSurroundBytes & 0x07FF); - $thisfile_mpeg_audio_lame['preset_used'] = getid3_mp3::LAMEpresetUsedLookup($thisfile_mpeg_audio_lame); - if (!empty($thisfile_mpeg_audio_lame['preset_used_id']) && empty($thisfile_mpeg_audio_lame['preset_used'])) { - $ThisFileInfo['warning'][] = 'Unknown LAME preset used ('.$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'; - $thisfile_mpeg_audio['bitrate'] = getid3_mp3::ClosestStandardMP3Bitrate($thisfile_mpeg_audio['bitrate']); - $ThisFileInfo['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) { - $thisfile_mpeg_audio['bitrate_mode'] = 'vbr'; - if (getid3_mp3::RecursiveFrameScanning($fd, $ThisFileInfo, $offset, $nextframetestoffset, true)) { - $recursivesearch = false; - $thisfile_mpeg_audio['bitrate_mode'] = 'cbr'; - } - if ($thisfile_mpeg_audio['bitrate_mode'] == 'vbr') { - $ThisFileInfo['warning'][] = 'VBR file with no VBR header. Bitrate values calculated from actual frame bitrates.'; - } - } - - } - - } - - if (($ExpectedNumberOfAudioBytes > 0) && ($ExpectedNumberOfAudioBytes != ($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']))) { - if ($ExpectedNumberOfAudioBytes > ($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset'])) { - if (@$ThisFileInfo['fileformat'] == 'riff') { - // ignore, audio data is broken into chunks so will always be data "missing" - } elseif (($ExpectedNumberOfAudioBytes - ($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset'])) == 1) { - $ThisFileInfo['warning'][] = 'Last byte of data truncated (this is a known bug in Meracl ID3 Tag Writer before v1.3.5)'; - } else { - $ThisFileInfo['warning'][] = 'Probable truncated file: expecting '.$ExpectedNumberOfAudioBytes.' bytes of audio data, only found '.($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']).' (short by '.($ExpectedNumberOfAudioBytes - ($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset'])).' bytes)'; - } - } else { - if ((($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) - $ExpectedNumberOfAudioBytes) == 1) { - // $prenullbytefileoffset = ftell($fd); - // fseek($fd, $ThisFileInfo['avdataend'], SEEK_SET); - // $PossibleNullByte = fread($fd, 1); - // fseek($fd, $prenullbytefileoffset, SEEK_SET); - // if ($PossibleNullByte === "\x00") { - $ThisFileInfo['avdataend']--; - // $ThisFileInfo['warning'][] = 'Extra null byte at end of MP3 data assumed to be RIFF padding and therefore ignored'; - // } else { - // $ThisFileInfo['warning'][] = 'Too much data in file: expecting '.$ExpectedNumberOfAudioBytes.' bytes of audio data, found '.($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']).' ('.(($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) - $ExpectedNumberOfAudioBytes).' bytes too many)'; - // } - } else { - $ThisFileInfo['warning'][] = 'Too much data in file: expecting '.$ExpectedNumberOfAudioBytes.' bytes of audio data, found '.($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']).' ('.(($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) - $ExpectedNumberOfAudioBytes).' bytes too many)'; - } - } - } - - if (($thisfile_mpeg_audio['bitrate'] == 'free') && empty($ThisFileInfo['audio']['bitrate'])) { - if (($offset == $ThisFileInfo['avdataoffset']) && empty($thisfile_mpeg_audio['VBR_frames'])) { - $framebytelength = getid3_mp3::FreeFormatFrameLength($fd, $offset, $ThisFileInfo, true); - if ($framebytelength > 0) { - $thisfile_mpeg_audio['framelength'] = $framebytelength; - if ($thisfile_mpeg_audio['layer'] == '1') { - // BitRate = (((FrameLengthInBytes / 4) - Padding) * SampleRate) / 12 - $ThisFileInfo['audio']['bitrate'] = ((($framebytelength / 4) - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 12; - } else { - // Bitrate = ((FrameLengthInBytes - Padding) * SampleRate) / 144 - $ThisFileInfo['audio']['bitrate'] = (($framebytelength - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 144; - } - } else { - $ThisFileInfo['error'][] = 'Error calculating frame length of free-format MP3 without Xing/LAME header'; - } - } - } - - if (@$thisfile_mpeg_audio['VBR_frames']) { - switch ($thisfile_mpeg_audio['bitrate_mode']) { - case 'vbr': - case 'abr': - if (($thisfile_mpeg_audio['version'] == '1') && ($thisfile_mpeg_audio['layer'] == 1)) { - $thisfile_mpeg_audio['VBR_bitrate'] = ((@$thisfile_mpeg_audio['VBR_bytes'] / $thisfile_mpeg_audio['VBR_frames']) * 8) * ($ThisFileInfo['audio']['sample_rate'] / 384); - } elseif ((($thisfile_mpeg_audio['version'] == '2') || ($thisfile_mpeg_audio['version'] == '2.5')) && ($thisfile_mpeg_audio['layer'] == 3)) { - $thisfile_mpeg_audio['VBR_bitrate'] = ((@$thisfile_mpeg_audio['VBR_bytes'] / $thisfile_mpeg_audio['VBR_frames']) * 8) * ($ThisFileInfo['audio']['sample_rate'] / 576); - } else { - $thisfile_mpeg_audio['VBR_bitrate'] = ((@$thisfile_mpeg_audio['VBR_bytes'] / $thisfile_mpeg_audio['VBR_frames']) * 8) * ($ThisFileInfo['audio']['sample_rate'] / 1152); - } - if ($thisfile_mpeg_audio['VBR_bitrate'] > 0) { - $ThisFileInfo['audio']['bitrate'] = $thisfile_mpeg_audio['VBR_bitrate']; - $thisfile_mpeg_audio['bitrate'] = $thisfile_mpeg_audio['VBR_bitrate']; // to avoid confusion - } - break; - } - } - - // End variable-bitrate headers - //////////////////////////////////////////////////////////////////////////////////// - - if ($recursivesearch) { - - if (!getid3_mp3::RecursiveFrameScanning($fd, $ThisFileInfo, $offset, $nextframetestoffset, $ScanAsCBR)) { - return false; - } - - } - - - //if (false) { - // // experimental side info parsing section - not returning anything useful yet - // - // $SideInfoBitstream = getid3_lib::BigEndian2Bin($SideInfoData); - // $SideInfoOffset = 0; - // - // if ($thisfile_mpeg_audio['version'] == '1') { - // if ($thisfile_mpeg_audio['channelmode'] == 'mono') { - // // MPEG-1 (mono) - // $thisfile_mpeg_audio['side_info']['main_data_begin'] = substr($SideInfoBitstream, $SideInfoOffset, 9); - // $SideInfoOffset += 9; - // $SideInfoOffset += 5; - // } else { - // // MPEG-1 (stereo, joint-stereo, dual-channel) - // $thisfile_mpeg_audio['side_info']['main_data_begin'] = substr($SideInfoBitstream, $SideInfoOffset, 9); - // $SideInfoOffset += 9; - // $SideInfoOffset += 3; - // } - // } else { // 2 or 2.5 - // if ($thisfile_mpeg_audio['channelmode'] == 'mono') { - // // MPEG-2, MPEG-2.5 (mono) - // $thisfile_mpeg_audio['side_info']['main_data_begin'] = substr($SideInfoBitstream, $SideInfoOffset, 8); - // $SideInfoOffset += 8; - // $SideInfoOffset += 1; - // } else { - // // MPEG-2, MPEG-2.5 (stereo, joint-stereo, dual-channel) - // $thisfile_mpeg_audio['side_info']['main_data_begin'] = substr($SideInfoBitstream, $SideInfoOffset, 8); - // $SideInfoOffset += 8; - // $SideInfoOffset += 2; - // } - // } - // - // if ($thisfile_mpeg_audio['version'] == '1') { - // for ($channel = 0; $channel < $ThisFileInfo['audio']['channels']; $channel++) { - // for ($scfsi_band = 0; $scfsi_band < 4; $scfsi_band++) { - // $thisfile_mpeg_audio['scfsi'][$channel][$scfsi_band] = substr($SideInfoBitstream, $SideInfoOffset, 1); - // $SideInfoOffset += 2; - // } - // } - // } - // for ($granule = 0; $granule < (($thisfile_mpeg_audio['version'] == '1') ? 2 : 1); $granule++) { - // for ($channel = 0; $channel < $ThisFileInfo['audio']['channels']; $channel++) { - // $thisfile_mpeg_audio['part2_3_length'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 12); - // $SideInfoOffset += 12; - // $thisfile_mpeg_audio['big_values'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 9); - // $SideInfoOffset += 9; - // $thisfile_mpeg_audio['global_gain'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 8); - // $SideInfoOffset += 8; - // if ($thisfile_mpeg_audio['version'] == '1') { - // $thisfile_mpeg_audio['scalefac_compress'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 4); - // $SideInfoOffset += 4; - // } else { - // $thisfile_mpeg_audio['scalefac_compress'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 9); - // $SideInfoOffset += 9; - // } - // $thisfile_mpeg_audio['window_switching_flag'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1); - // $SideInfoOffset += 1; - // - // if ($thisfile_mpeg_audio['window_switching_flag'][$granule][$channel] == '1') { - // - // $thisfile_mpeg_audio['block_type'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 2); - // $SideInfoOffset += 2; - // $thisfile_mpeg_audio['mixed_block_flag'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1); - // $SideInfoOffset += 1; - // - // for ($region = 0; $region < 2; $region++) { - // $thisfile_mpeg_audio['table_select'][$granule][$channel][$region] = substr($SideInfoBitstream, $SideInfoOffset, 5); - // $SideInfoOffset += 5; - // } - // $thisfile_mpeg_audio['table_select'][$granule][$channel][2] = 0; - // - // for ($window = 0; $window < 3; $window++) { - // $thisfile_mpeg_audio['subblock_gain'][$granule][$channel][$window] = substr($SideInfoBitstream, $SideInfoOffset, 3); - // $SideInfoOffset += 3; - // } - // - // } else { - // - // for ($region = 0; $region < 3; $region++) { - // $thisfile_mpeg_audio['table_select'][$granule][$channel][$region] = substr($SideInfoBitstream, $SideInfoOffset, 5); - // $SideInfoOffset += 5; - // } - // - // $thisfile_mpeg_audio['region0_count'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 4); - // $SideInfoOffset += 4; - // $thisfile_mpeg_audio['region1_count'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 3); - // $SideInfoOffset += 3; - // $thisfile_mpeg_audio['block_type'][$granule][$channel] = 0; - // } - // - // if ($thisfile_mpeg_audio['version'] == '1') { - // $thisfile_mpeg_audio['preflag'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1); - // $SideInfoOffset += 1; - // } - // $thisfile_mpeg_audio['scalefac_scale'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1); - // $SideInfoOffset += 1; - // $thisfile_mpeg_audio['count1table_select'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1); - // $SideInfoOffset += 1; - // } - // } - //} - - return true; - } - - function RecursiveFrameScanning(&$fd, &$ThisFileInfo, &$offset, &$nextframetestoffset, $ScanAsCBR) { - for ($i = 0; $i < GETID3_MP3_VALID_CHECK_FRAMES; $i++) { - // check next GETID3_MP3_VALID_CHECK_FRAMES frames for validity, to make sure we haven't run across a false synch - if (($nextframetestoffset + 4) >= $ThisFileInfo['avdataend']) { - // end of file - return true; - } - - $nextframetestarray = array('error'=>'', 'warning'=>'', 'avdataend'=>$ThisFileInfo['avdataend'], 'avdataoffset'=>$ThisFileInfo['avdataoffset']); - if (getid3_mp3::decodeMPEGaudioHeader($fd, $nextframetestoffset, $nextframetestarray, false)) { - if ($ScanAsCBR) { - // force CBR mode, used for trying to pick out invalid audio streams with - // valid(?) VBR headers, or VBR streams with no VBR header - if (!isset($nextframetestarray['mpeg']['audio']['bitrate']) || !isset($ThisFileInfo['mpeg']['audio']['bitrate']) || ($nextframetestarray['mpeg']['audio']['bitrate'] != $ThisFileInfo['mpeg']['audio']['bitrate'])) { - return false; - } - } - - - // next frame is OK, get ready to check the one after that - if (isset($nextframetestarray['mpeg']['audio']['framelength']) && ($nextframetestarray['mpeg']['audio']['framelength'] > 0)) { - $nextframetestoffset += $nextframetestarray['mpeg']['audio']['framelength']; - } else { - $ThisFileInfo['error'][] = 'Frame at offset ('.$offset.') is has an invalid frame length.'; - return false; - } - - } else { - - // next frame is not valid, note the error and fail, so scanning can contiue for a valid frame sequence - $ThisFileInfo['error'][] = 'Frame at offset ('.$offset.') is valid, but the next one at ('.$nextframetestoffset.') is not.'; - - return false; - } - } - return true; - } - - function FreeFormatFrameLength($fd, $offset, &$ThisFileInfo, $deepscan=false) { - fseek($fd, $offset, SEEK_SET); - $MPEGaudioData = fread($fd, 32768); - - $SyncPattern1 = substr($MPEGaudioData, 0, 4); - // may be different pattern due to padding - $SyncPattern2 = $SyncPattern1{0}.$SyncPattern1{1}.chr(ord($SyncPattern1{2}) | 0x02).$SyncPattern1{3}; - if ($SyncPattern2 === $SyncPattern1) { - $SyncPattern2 = $SyncPattern1{0}.$SyncPattern1{1}.chr(ord($SyncPattern1{2}) & 0xFD).$SyncPattern1{3}; - } - - $framelength = false; - $framelength1 = strpos($MPEGaudioData, $SyncPattern1, 4); - $framelength2 = strpos($MPEGaudioData, $SyncPattern2, 4); - if ($framelength1 > 4) { - $framelength = $framelength1; - } - if (($framelength2 > 4) && ($framelength2 < $framelength1)) { - $framelength = $framelength2; - } - if (!$framelength) { - - // LAME 3.88 has a different value for modeextension on the first frame vs the rest - $framelength1 = strpos($MPEGaudioData, substr($SyncPattern1, 0, 3), 4); - $framelength2 = strpos($MPEGaudioData, substr($SyncPattern2, 0, 3), 4); - - if ($framelength1 > 4) { - $framelength = $framelength1; - } - if (($framelength2 > 4) && ($framelength2 < $framelength1)) { - $framelength = $framelength2; - } - if (!$framelength) { - $ThisFileInfo['error'][] = 'Cannot find next free-format synch pattern ('.getid3_lib::PrintHexBytes($SyncPattern1).' or '.getid3_lib::PrintHexBytes($SyncPattern2).') after offset '.$offset; - return false; - } else { - $ThisFileInfo['warning'][] = 'ModeExtension varies between first frame and other frames (known free-format issue in LAME 3.88)'; - $ThisFileInfo['audio']['codec'] = 'LAME'; - $ThisFileInfo['audio']['encoder'] = 'LAME3.88'; - $SyncPattern1 = substr($SyncPattern1, 0, 3); - $SyncPattern2 = substr($SyncPattern2, 0, 3); - } - } - - if ($deepscan) { - - $ActualFrameLengthValues = array(); - $nextoffset = $offset + $framelength; - while ($nextoffset < ($ThisFileInfo['avdataend'] - 6)) { - fseek($fd, $nextoffset - 1, SEEK_SET); - $NextSyncPattern = fread($fd, 6); - if ((substr($NextSyncPattern, 1, strlen($SyncPattern1)) == $SyncPattern1) || (substr($NextSyncPattern, 1, strlen($SyncPattern2)) == $SyncPattern2)) { - // good - found where expected - $ActualFrameLengthValues[] = $framelength; - } elseif ((substr($NextSyncPattern, 0, strlen($SyncPattern1)) == $SyncPattern1) || (substr($NextSyncPattern, 0, strlen($SyncPattern2)) == $SyncPattern2)) { - // ok - found one byte earlier than expected (last frame wasn't padded, first frame was) - $ActualFrameLengthValues[] = ($framelength - 1); - $nextoffset--; - } elseif ((substr($NextSyncPattern, 2, strlen($SyncPattern1)) == $SyncPattern1) || (substr($NextSyncPattern, 2, strlen($SyncPattern2)) == $SyncPattern2)) { - // ok - found one byte later than expected (last frame was padded, first frame wasn't) - $ActualFrameLengthValues[] = ($framelength + 1); - $nextoffset++; - } else { - $ThisFileInfo['error'][] = 'Did not find expected free-format sync pattern at offset '.$nextoffset; - return false; - } - $nextoffset += $framelength; - } - if (count($ActualFrameLengthValues) > 0) { - $framelength = intval(round(array_sum($ActualFrameLengthValues) / count($ActualFrameLengthValues))); - } - } - return $framelength; - } - - function getOnlyMPEGaudioInfoBruteForce($fd, &$ThisFileInfo) { - - $MPEGaudioHeaderDecodeCache = array(); - $MPEGaudioHeaderValidCache = array(); - $MPEGaudioHeaderLengthCache = array(); - $MPEGaudioVersionLookup = getid3_mp3::MPEGaudioVersionArray(); - $MPEGaudioLayerLookup = getid3_mp3::MPEGaudioLayerArray(); - $MPEGaudioBitrateLookup = getid3_mp3::MPEGaudioBitrateArray(); - $MPEGaudioFrequencyLookup = getid3_mp3::MPEGaudioFrequencyArray(); - $MPEGaudioChannelModeLookup = getid3_mp3::MPEGaudioChannelModeArray(); - $MPEGaudioModeExtensionLookup = getid3_mp3::MPEGaudioModeExtensionArray(); - $MPEGaudioEmphasisLookup = getid3_mp3::MPEGaudioEmphasisArray(); - $LongMPEGversionLookup = array(); - $LongMPEGlayerLookup = array(); - $LongMPEGbitrateLookup = array(); - $LongMPEGpaddingLookup = array(); - $LongMPEGfrequencyLookup = array(); - - $Distribution['bitrate'] = array(); - $Distribution['frequency'] = array(); - $Distribution['layer'] = array(); - $Distribution['version'] = array(); - $Distribution['padding'] = array(); - - fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET); - - $max_frames_scan = 5000; - $frames_scanned = 0; - - $previousvalidframe = $ThisFileInfo['avdataoffset']; - while (ftell($fd) < $ThisFileInfo['avdataend']) { - set_time_limit(30); - $head4 = fread($fd, 4); - if (strlen($head4) < 4) { - break; - } - if ($head4{0} != "\xFF") { - for ($i = 1; $i < 4; $i++) { - if ($head4{$i} == "\xFF") { - fseek($fd, $i - 4, SEEK_CUR); - continue 2; - } - } - continue; - } - if (!isset($MPEGaudioHeaderDecodeCache[$head4])) { - $MPEGaudioHeaderDecodeCache[$head4] = getid3_mp3::MPEGaudioHeaderDecode($head4); - } - if (!isset($MPEGaudioHeaderValidCache[$head4])) { - $MPEGaudioHeaderValidCache[$head4] = getid3_mp3::MPEGaudioHeaderValid($MPEGaudioHeaderDecodeCache[$head4], false, false); - } - if ($MPEGaudioHeaderValidCache[$head4]) { - - if (!isset($MPEGaudioHeaderLengthCache[$head4])) { - $LongMPEGversionLookup[$head4] = $MPEGaudioVersionLookup[$MPEGaudioHeaderDecodeCache[$head4]['version']]; - $LongMPEGlayerLookup[$head4] = $MPEGaudioLayerLookup[$MPEGaudioHeaderDecodeCache[$head4]['layer']]; - $LongMPEGbitrateLookup[$head4] = $MPEGaudioBitrateLookup[$LongMPEGversionLookup[$head4]][$LongMPEGlayerLookup[$head4]][$MPEGaudioHeaderDecodeCache[$head4]['bitrate']]; - $LongMPEGpaddingLookup[$head4] = (bool) $MPEGaudioHeaderDecodeCache[$head4]['padding']; - $LongMPEGfrequencyLookup[$head4] = $MPEGaudioFrequencyLookup[$LongMPEGversionLookup[$head4]][$MPEGaudioHeaderDecodeCache[$head4]['sample_rate']]; - $MPEGaudioHeaderLengthCache[$head4] = getid3_mp3::MPEGaudioFrameLength( - $LongMPEGbitrateLookup[$head4], - $LongMPEGversionLookup[$head4], - $LongMPEGlayerLookup[$head4], - $LongMPEGpaddingLookup[$head4], - $LongMPEGfrequencyLookup[$head4]); - } - if ($MPEGaudioHeaderLengthCache[$head4] > 4) { - $WhereWeWere = ftell($fd); - fseek($fd, $MPEGaudioHeaderLengthCache[$head4] - 4, SEEK_CUR); - $next4 = fread($fd, 4); - if ($next4{0} == "\xFF") { - if (!isset($MPEGaudioHeaderDecodeCache[$next4])) { - $MPEGaudioHeaderDecodeCache[$next4] = getid3_mp3::MPEGaudioHeaderDecode($next4); - } - if (!isset($MPEGaudioHeaderValidCache[$next4])) { - $MPEGaudioHeaderValidCache[$next4] = getid3_mp3::MPEGaudioHeaderValid($MPEGaudioHeaderDecodeCache[$next4], false, false); - } - if ($MPEGaudioHeaderValidCache[$next4]) { - fseek($fd, -4, SEEK_CUR); - - @$Distribution['bitrate'][$LongMPEGbitrateLookup[$head4]]++; - @$Distribution['layer'][$LongMPEGlayerLookup[$head4]]++; - @$Distribution['version'][$LongMPEGversionLookup[$head4]]++; - @$Distribution['padding'][intval($LongMPEGpaddingLookup[$head4])]++; - @$Distribution['frequency'][$LongMPEGfrequencyLookup[$head4]]++; - if ($max_frames_scan && (++$frames_scanned >= $max_frames_scan)) { - $pct_data_scanned = (ftell($fd) - $ThisFileInfo['avdataoffset']) / ($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']); - $ThisFileInfo['warning'][] = 'too many MPEG audio frames to scan, only scanned first '.$max_frames_scan.' frames ('.number_format($pct_data_scanned * 100, 1).'% of file) and extrapolated distribution, playtime and bitrate may be incorrect.'; - foreach ($Distribution as $key1 => $value1) { - foreach ($value1 as $key2 => $value2) { - $Distribution[$key1][$key2] = round($value2 / $pct_data_scanned); - } - } - break; - } - continue; - } - } - unset($next4); - fseek($fd, $WhereWeWere - 3, SEEK_SET); - } - - } - } - foreach ($Distribution as $key => $value) { - ksort($Distribution[$key], SORT_NUMERIC); - } - ksort($Distribution['version'], SORT_STRING); - $ThisFileInfo['mpeg']['audio']['bitrate_distribution'] = $Distribution['bitrate']; - $ThisFileInfo['mpeg']['audio']['frequency_distribution'] = $Distribution['frequency']; - $ThisFileInfo['mpeg']['audio']['layer_distribution'] = $Distribution['layer']; - $ThisFileInfo['mpeg']['audio']['version_distribution'] = $Distribution['version']; - $ThisFileInfo['mpeg']['audio']['padding_distribution'] = $Distribution['padding']; - if (count($Distribution['version']) > 1) { - $ThisFileInfo['error'][] = 'Corrupt file - more than one MPEG version detected'; - } - if (count($Distribution['layer']) > 1) { - $ThisFileInfo['error'][] = 'Corrupt file - more than one MPEG layer detected'; - } - if (count($Distribution['frequency']) > 1) { - $ThisFileInfo['error'][] = 'Corrupt file - more than one MPEG sample rate detected'; - } - - - $bittotal = 0; - foreach ($Distribution['bitrate'] as $bitratevalue => $bitratecount) { - if ($bitratevalue != 'free') { - $bittotal += ($bitratevalue * $bitratecount); - } - } - $ThisFileInfo['mpeg']['audio']['frame_count'] = array_sum($Distribution['bitrate']); - if ($ThisFileInfo['mpeg']['audio']['frame_count'] == 0) { - $ThisFileInfo['error'][] = 'no MPEG audio frames found'; - return false; - } - $ThisFileInfo['mpeg']['audio']['bitrate'] = ($bittotal / $ThisFileInfo['mpeg']['audio']['frame_count']); - $ThisFileInfo['mpeg']['audio']['bitrate_mode'] = ((count($Distribution['bitrate']) > 0) ? 'vbr' : 'cbr'); - $ThisFileInfo['mpeg']['audio']['sample_rate'] = getid3_lib::array_max($Distribution['frequency'], true); - - $ThisFileInfo['audio']['bitrate'] = $ThisFileInfo['mpeg']['audio']['bitrate']; - $ThisFileInfo['audio']['bitrate_mode'] = $ThisFileInfo['mpeg']['audio']['bitrate_mode']; - $ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['mpeg']['audio']['sample_rate']; - $ThisFileInfo['audio']['dataformat'] = 'mp'.getid3_lib::array_max($Distribution['layer'], true); - $ThisFileInfo['fileformat'] = $ThisFileInfo['audio']['dataformat']; - - return true; - } - - - function getOnlyMPEGaudioInfo($fd, &$ThisFileInfo, $avdataoffset, $BitrateHistogram=false) { - - // looks for synch, decodes MPEG audio header - - static $MPEGaudioVersionLookup; - static $MPEGaudioLayerLookup; - static $MPEGaudioBitrateLookup; - if (empty($MPEGaudioVersionLookup)) { - $MPEGaudioVersionLookup = getid3_mp3::MPEGaudioVersionArray(); - $MPEGaudioLayerLookup = getid3_mp3::MPEGaudioLayerArray(); - $MPEGaudioBitrateLookup = getid3_mp3::MPEGaudioBitrateArray(); - - } - - fseek($fd, $avdataoffset, SEEK_SET); - $sync_seek_buffer_size = min(128 * 1024, $ThisFileInfo['avdataend'] - $avdataoffset); - if ($sync_seek_buffer_size <= 0) { - $ThisFileInfo['error'][] = 'Invalid $sync_seek_buffer_size at offset '.$avdataoffset; - return false; - } - $header = fread($fd, $sync_seek_buffer_size); - $sync_seek_buffer_size = strlen($header); - $SynchSeekOffset = 0; - while ($SynchSeekOffset < $sync_seek_buffer_size) { - - if ((($avdataoffset + $SynchSeekOffset) < $ThisFileInfo['avdataend']) && !feof($fd)) { - - if ($SynchSeekOffset > $sync_seek_buffer_size) { - // if a synch's not found within the first 128k bytes, then give up - $ThisFileInfo['error'][] = 'Could not find valid MPEG audio synch within the first '.round($sync_seek_buffer_size / 1024).'kB'; - if (isset($ThisFileInfo['audio']['bitrate'])) { - unset($ThisFileInfo['audio']['bitrate']); - } - if (isset($ThisFileInfo['mpeg']['audio'])) { - unset($ThisFileInfo['mpeg']['audio']); - } - if (empty($ThisFileInfo['mpeg'])) { - unset($ThisFileInfo['mpeg']); - } - return false; - - } elseif (feof($fd)) { - - $ThisFileInfo['error'][] = 'Could not find valid MPEG audio synch before end of file'; - if (isset($ThisFileInfo['audio']['bitrate'])) { - unset($ThisFileInfo['audio']['bitrate']); - } - if (isset($ThisFileInfo['mpeg']['audio'])) { - unset($ThisFileInfo['mpeg']['audio']); - } - if (isset($ThisFileInfo['mpeg']) && (!is_array($ThisFileInfo['mpeg']) || (count($ThisFileInfo['mpeg']) == 0))) { - unset($ThisFileInfo['mpeg']); - } - return false; - } - } - - if (($SynchSeekOffset + 1) >= strlen($header)) { - $ThisFileInfo['error'][] = 'Could not find valid MPEG synch before end of file'; - return false; - } - - if (($header{$SynchSeekOffset} == "\xFF") && ($header{($SynchSeekOffset + 1)} > "\xE0")) { // synch detected - - if (!isset($FirstFrameThisfileInfo) && !isset($ThisFileInfo['mpeg']['audio'])) { - $FirstFrameThisfileInfo = $ThisFileInfo; - $FirstFrameAVDataOffset = $avdataoffset + $SynchSeekOffset; - if (!getid3_mp3::decodeMPEGaudioHeader($fd, $avdataoffset + $SynchSeekOffset, $FirstFrameThisfileInfo, false)) { - // if this is the first valid MPEG-audio frame, save it in case it's a VBR header frame and there's - // garbage between this frame and a valid sequence of MPEG-audio frames, to be restored below - unset($FirstFrameThisfileInfo); - } - } - - $dummy = $ThisFileInfo; // only overwrite real data if valid header found - if (getid3_mp3::decodeMPEGaudioHeader($fd, $avdataoffset + $SynchSeekOffset, $dummy, true)) { - $ThisFileInfo = $dummy; - $ThisFileInfo['avdataoffset'] = $avdataoffset + $SynchSeekOffset; - switch (@$ThisFileInfo['fileformat']) { - case '': - case 'id3': - case 'ape': - case 'mp3': - $ThisFileInfo['fileformat'] = 'mp3'; - $ThisFileInfo['audio']['dataformat'] = 'mp3'; - break; - } - if (isset($FirstFrameThisfileInfo['mpeg']['audio']['bitrate_mode']) && ($FirstFrameThisfileInfo['mpeg']['audio']['bitrate_mode'] == 'vbr')) { - if (!(abs($ThisFileInfo['audio']['bitrate'] - $FirstFrameThisfileInfo['audio']['bitrate']) <= 1)) { - // If there is garbage data between a valid VBR header frame and a sequence - // of valid MPEG-audio frames the VBR data is no longer discarded. - $ThisFileInfo = $FirstFrameThisfileInfo; - $ThisFileInfo['avdataoffset'] = $FirstFrameAVDataOffset; - $ThisFileInfo['fileformat'] = 'mp3'; - $ThisFileInfo['audio']['dataformat'] = 'mp3'; - $dummy = $ThisFileInfo; - unset($dummy['mpeg']['audio']); - $GarbageOffsetStart = $FirstFrameAVDataOffset + $FirstFrameThisfileInfo['mpeg']['audio']['framelength']; - $GarbageOffsetEnd = $avdataoffset + $SynchSeekOffset; - if (getid3_mp3::decodeMPEGaudioHeader($fd, $GarbageOffsetEnd, $dummy, true, true)) { - - $ThisFileInfo = $dummy; - $ThisFileInfo['avdataoffset'] = $GarbageOffsetEnd; - $ThisFileInfo['warning'][] = 'apparently-valid VBR header not used because could not find '.GETID3_MP3_VALID_CHECK_FRAMES.' consecutive MPEG-audio frames immediately after VBR header (garbage data for '.($GarbageOffsetEnd - $GarbageOffsetStart).' bytes between '.$GarbageOffsetStart.' and '.$GarbageOffsetEnd.'), but did find valid CBR stream starting at '.$GarbageOffsetEnd; - - } else { - - $ThisFileInfo['warning'][] = 'using data from VBR header even though could not find '.GETID3_MP3_VALID_CHECK_FRAMES.' consecutive MPEG-audio frames immediately after VBR header (garbage data for '.($GarbageOffsetEnd - $GarbageOffsetStart).' bytes between '.$GarbageOffsetStart.' and '.$GarbageOffsetEnd.')'; - - } - } - } - if (isset($ThisFileInfo['mpeg']['audio']['bitrate_mode']) && ($ThisFileInfo['mpeg']['audio']['bitrate_mode'] == 'vbr') && !isset($ThisFileInfo['mpeg']['audio']['VBR_method'])) { - // VBR file with no VBR header - $BitrateHistogram = true; - } - - if ($BitrateHistogram) { - - $ThisFileInfo['mpeg']['audio']['stereo_distribution'] = array('stereo'=>0, 'joint stereo'=>0, 'dual channel'=>0, 'mono'=>0); - $ThisFileInfo['mpeg']['audio']['version_distribution'] = array('1'=>0, '2'=>0, '2.5'=>0); - - if ($ThisFileInfo['mpeg']['audio']['version'] == '1') { - if ($ThisFileInfo['mpeg']['audio']['layer'] == 3) { - $ThisFileInfo['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 32000=>0, 40000=>0, 48000=>0, 56000=>0, 64000=>0, 80000=>0, 96000=>0, 112000=>0, 128000=>0, 160000=>0, 192000=>0, 224000=>0, 256000=>0, 320000=>0); - } elseif ($ThisFileInfo['mpeg']['audio']['layer'] == 2) { - $ThisFileInfo['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 32000=>0, 48000=>0, 56000=>0, 64000=>0, 80000=>0, 96000=>0, 112000=>0, 128000=>0, 160000=>0, 192000=>0, 224000=>0, 256000=>0, 320000=>0, 384000=>0); - } elseif ($ThisFileInfo['mpeg']['audio']['layer'] == 1) { - $ThisFileInfo['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 32000=>0, 64000=>0, 96000=>0, 128000=>0, 160000=>0, 192000=>0, 224000=>0, 256000=>0, 288000=>0, 320000=>0, 352000=>0, 384000=>0, 416000=>0, 448000=>0); - } - } elseif ($ThisFileInfo['mpeg']['audio']['layer'] == 1) { - $ThisFileInfo['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 32000=>0, 48000=>0, 56000=>0, 64000=>0, 80000=>0, 96000=>0, 112000=>0, 128000=>0, 144000=>0, 160000=>0, 176000=>0, 192000=>0, 224000=>0, 256000=>0); - } else { - $ThisFileInfo['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 8000=>0, 16000=>0, 24000=>0, 32000=>0, 40000=>0, 48000=>0, 56000=>0, 64000=>0, 80000=>0, 96000=>0, 112000=>0, 128000=>0, 144000=>0, 160000=>0); - } - - $dummy = array('error'=>$ThisFileInfo['error'], 'warning'=>$ThisFileInfo['warning'], 'avdataend'=>$ThisFileInfo['avdataend'], 'avdataoffset'=>$ThisFileInfo['avdataoffset']); - $synchstartoffset = $ThisFileInfo['avdataoffset']; - fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET); - - // you can play with these numbers: - $max_frames_scan = 50000; - $max_scan_segments = 10; - - // don't play with these numbers: - $FastMode = false; - $SynchErrorsFound = 0; - $frames_scanned = 0; - $this_scan_segment = 0; - $frames_scan_per_segment = ceil($max_frames_scan / $max_scan_segments); - $pct_data_scanned = 0; - for ($current_segment = 0; $current_segment < $max_scan_segments; $current_segment++) { -//echo 'was at '.ftell($fd).'<br>'; - $frames_scanned_this_segment = 0; - if (ftell($fd) >= $ThisFileInfo['avdataend']) { -//echo 'breaking because current position ('.ftell($fd).') is >= $ThisFileInfo[avdataend] ('.$ThisFileInfo['avdataend'].')<br>'; - break; - } - $scan_start_offset[$current_segment] = max(ftell($fd), $ThisFileInfo['avdataoffset'] + round($current_segment * (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) / $max_scan_segments))); -//echo 'start at '.$scan_start_offset[$current_segment].'<br>'; - if ($current_segment > 0) { - fseek($fd, $scan_start_offset[$current_segment], SEEK_SET); - $buffer_4k = fread($fd, 4096); - for ($j = 0; $j < (strlen($buffer_4k) - 4); $j++) { - if (($buffer_4k{$j} == "\xFF") && ($buffer_4k{($j + 1)} > "\xE0")) { // synch detected - if (getid3_mp3::decodeMPEGaudioHeader($fd, $scan_start_offset[$current_segment] + $j, $dummy, false, false, $FastMode)) { - $calculated_next_offset = $scan_start_offset[$current_segment] + $j + $dummy['mpeg']['audio']['framelength']; - if (getid3_mp3::decodeMPEGaudioHeader($fd, $calculated_next_offset, $dummy, false, false, $FastMode)) { - $scan_start_offset[$current_segment] += $j; - break; - } else { -//echo 'header['.__LINE__.'] at '.($calculated_next_offset).' invalid<br>'; - } - } else { -//echo 'header['.__LINE__.'] at '.($scan_start_offset[$current_segment] + $j).' invalid<br>'; - } - } - } - } -//echo 'actually start at '.$scan_start_offset[$current_segment].'<br>'; - $synchstartoffset = $scan_start_offset[$current_segment]; - while (getid3_mp3::decodeMPEGaudioHeader($fd, $synchstartoffset, $dummy, false, false, $FastMode)) { - $FastMode = true; - $thisframebitrate = $MPEGaudioBitrateLookup[$MPEGaudioVersionLookup[$dummy['mpeg']['audio']['raw']['version']]][$MPEGaudioLayerLookup[$dummy['mpeg']['audio']['raw']['layer']]][$dummy['mpeg']['audio']['raw']['bitrate']]; - - if (empty($dummy['mpeg']['audio']['framelength'])) { - $SynchErrorsFound++; - $synchstartoffset++; -//echo ' [Ø] '; - } else { -//echo ' . '; - @$ThisFileInfo['mpeg']['audio']['bitrate_distribution'][$thisframebitrate]++; - @$ThisFileInfo['mpeg']['audio']['stereo_distribution'][$dummy['mpeg']['audio']['channelmode']]++; - @$ThisFileInfo['mpeg']['audio']['version_distribution'][$dummy['mpeg']['audio']['version']]++; - - $synchstartoffset += $dummy['mpeg']['audio']['framelength']; - } - $frames_scanned++; - if ($frames_scan_per_segment && (++$frames_scanned_this_segment >= $frames_scan_per_segment)) { - $this_pct_scanned = (ftell($fd) - $scan_start_offset[$current_segment]) / ($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']); - if (($current_segment == 0) && (($this_pct_scanned * $max_scan_segments) >= 1)) { - // file likely contains < $max_frames_scan, just scan as one segment - $max_scan_segments = 1; - $frames_scan_per_segment = $max_frames_scan; - } else { - $pct_data_scanned += $this_pct_scanned; -//var_dump($pct_data_scanned); -//exit; - break; - } - } - } -//echo '<hr>'; - } - if ($pct_data_scanned > 0) { - $ThisFileInfo['warning'][] = 'too many MPEG audio frames to scan, only scanned '.$frames_scanned.' frames in '.$max_scan_segments.' segments ('.number_format($pct_data_scanned * 100, 1).'% of file) and extrapolated distribution, playtime and bitrate may be incorrect.'; - foreach ($ThisFileInfo['mpeg']['audio'] as $key1 => $value1) { - if (!eregi('_distribution$', $key1)) { - continue; - } - foreach ($value1 as $key2 => $value2) { - $ThisFileInfo['mpeg']['audio'][$key1][$key2] = round($value2 / $pct_data_scanned); - } - } - } - - if ($SynchErrorsFound > 0) { - $ThisFileInfo['warning'][] = 'Found '.$SynchErrorsFound.' synch errors in histogram analysis'; - //return false; - } - - $bittotal = 0; - $framecounter = 0; - foreach ($ThisFileInfo['mpeg']['audio']['bitrate_distribution'] as $bitratevalue => $bitratecount) { - $framecounter += $bitratecount; - if ($bitratevalue != 'free') { - $bittotal += ($bitratevalue * $bitratecount); - } - } - if ($framecounter == 0) { - $ThisFileInfo['error'][] = 'Corrupt MP3 file: framecounter == zero'; - return false; - } - $ThisFileInfo['mpeg']['audio']['frame_count'] = getid3_lib::CastAsInt($framecounter); - $ThisFileInfo['mpeg']['audio']['bitrate'] = ($bittotal / $framecounter); - - $ThisFileInfo['audio']['bitrate'] = $ThisFileInfo['mpeg']['audio']['bitrate']; - - - // Definitively set VBR vs CBR, even if the Xing/LAME/VBRI header says differently - $distinct_bitrates = 0; - foreach ($ThisFileInfo['mpeg']['audio']['bitrate_distribution'] as $bitrate_value => $bitrate_count) { - if ($bitrate_count > 0) { - $distinct_bitrates++; - } - } - if ($distinct_bitrates > 1) { - $ThisFileInfo['mpeg']['audio']['bitrate_mode'] = 'vbr'; - } else { - $ThisFileInfo['mpeg']['audio']['bitrate_mode'] = 'cbr'; - } - $ThisFileInfo['audio']['bitrate_mode'] = $ThisFileInfo['mpeg']['audio']['bitrate_mode']; - - } - - break; // exit while() - } - } - - $SynchSeekOffset++; - if (($avdataoffset + $SynchSeekOffset) >= $ThisFileInfo['avdataend']) { - // end of file/data - - if (empty($ThisFileInfo['mpeg']['audio'])) { - - $ThisFileInfo['error'][] = 'could not find valid MPEG synch before end of file'; - if (isset($ThisFileInfo['audio']['bitrate'])) { - unset($ThisFileInfo['audio']['bitrate']); - } - if (isset($ThisFileInfo['mpeg']['audio'])) { - unset($ThisFileInfo['mpeg']['audio']); - } - if (isset($ThisFileInfo['mpeg']) && (!is_array($ThisFileInfo['mpeg']) || empty($ThisFileInfo['mpeg']))) { - unset($ThisFileInfo['mpeg']); - } - return false; - - } - break; - } - - } - $ThisFileInfo['audio']['channels'] = $ThisFileInfo['mpeg']['audio']['channels']; - $ThisFileInfo['audio']['channelmode'] = $ThisFileInfo['mpeg']['audio']['channelmode']; - $ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['mpeg']['audio']['sample_rate']; - return true; - } - - - function MPEGaudioVersionArray() { - static $MPEGaudioVersion = array('2.5', false, '2', '1'); - return $MPEGaudioVersion; - } - - function MPEGaudioLayerArray() { - static $MPEGaudioLayer = array(false, 3, 2, 1); - return $MPEGaudioLayer; - } - - function MPEGaudioBitrateArray() { - static $MPEGaudioBitrate; - if (empty($MPEGaudioBitrate)) { - $MPEGaudioBitrate = array ( - '1' => array (1 => array('free', 32000, 64000, 96000, 128000, 160000, 192000, 224000, 256000, 288000, 320000, 352000, 384000, 416000, 448000), - 2 => array('free', 32000, 48000, 56000, 64000, 80000, 96000, 112000, 128000, 160000, 192000, 224000, 256000, 320000, 384000), - 3 => array('free', 32000, 40000, 48000, 56000, 64000, 80000, 96000, 112000, 128000, 160000, 192000, 224000, 256000, 320000) - ), - - '2' => array (1 => array('free', 32000, 48000, 56000, 64000, 80000, 96000, 112000, 128000, 144000, 160000, 176000, 192000, 224000, 256000), - 2 => array('free', 8000, 16000, 24000, 32000, 40000, 48000, 56000, 64000, 80000, 96000, 112000, 128000, 144000, 160000), - ) - ); - $MPEGaudioBitrate['2'][3] = $MPEGaudioBitrate['2'][2]; - $MPEGaudioBitrate['2.5'] = $MPEGaudioBitrate['2']; - } - return $MPEGaudioBitrate; - } - - function MPEGaudioFrequencyArray() { - static $MPEGaudioFrequency; - if (empty($MPEGaudioFrequency)) { - $MPEGaudioFrequency = array ( - '1' => array(44100, 48000, 32000), - '2' => array(22050, 24000, 16000), - '2.5' => array(11025, 12000, 8000) - ); - } - return $MPEGaudioFrequency; - } - - function MPEGaudioChannelModeArray() { - static $MPEGaudioChannelMode = array('stereo', 'joint stereo', 'dual channel', 'mono'); - return $MPEGaudioChannelMode; - } - - function MPEGaudioModeExtensionArray() { - static $MPEGaudioModeExtension; - if (empty($MPEGaudioModeExtension)) { - $MPEGaudioModeExtension = array ( - 1 => array('4-31', '8-31', '12-31', '16-31'), - 2 => array('4-31', '8-31', '12-31', '16-31'), - 3 => array('', 'IS', 'MS', 'IS+MS') - ); - } - return $MPEGaudioModeExtension; - } - - function MPEGaudioEmphasisArray() { - static $MPEGaudioEmphasis = array('none', '50/15ms', false, 'CCIT J.17'); - return $MPEGaudioEmphasis; - } - - function MPEGaudioHeaderBytesValid($head4, $allowBitrate15=false) { - return getid3_mp3::MPEGaudioHeaderValid(getid3_mp3::MPEGaudioHeaderDecode($head4), false, $allowBitrate15); - } - - function MPEGaudioHeaderValid($rawarray, $echoerrors=false, $allowBitrate15=false) { - if (($rawarray['synch'] & 0x0FFE) != 0x0FFE) { - return false; - } - - static $MPEGaudioVersionLookup; - static $MPEGaudioLayerLookup; - static $MPEGaudioBitrateLookup; - static $MPEGaudioFrequencyLookup; - static $MPEGaudioChannelModeLookup; - static $MPEGaudioModeExtensionLookup; - static $MPEGaudioEmphasisLookup; - if (empty($MPEGaudioVersionLookup)) { - $MPEGaudioVersionLookup = getid3_mp3::MPEGaudioVersionArray(); - $MPEGaudioLayerLookup = getid3_mp3::MPEGaudioLayerArray(); - $MPEGaudioBitrateLookup = getid3_mp3::MPEGaudioBitrateArray(); - $MPEGaudioFrequencyLookup = getid3_mp3::MPEGaudioFrequencyArray(); - $MPEGaudioChannelModeLookup = getid3_mp3::MPEGaudioChannelModeArray(); - $MPEGaudioModeExtensionLookup = getid3_mp3::MPEGaudioModeExtensionArray(); - $MPEGaudioEmphasisLookup = getid3_mp3::MPEGaudioEmphasisArray(); - } - - if (isset($MPEGaudioVersionLookup[$rawarray['version']])) { - $decodedVersion = $MPEGaudioVersionLookup[$rawarray['version']]; - } else { - echo ($echoerrors ? "\n".'invalid Version ('.$rawarray['version'].')' : ''); - return false; - } - if (isset($MPEGaudioLayerLookup[$rawarray['layer']])) { - $decodedLayer = $MPEGaudioLayerLookup[$rawarray['layer']]; - } else { - echo ($echoerrors ? "\n".'invalid Layer ('.$rawarray['layer'].')' : ''); - return false; - } - if (!isset($MPEGaudioBitrateLookup[$decodedVersion][$decodedLayer][$rawarray['bitrate']])) { - echo ($echoerrors ? "\n".'invalid Bitrate ('.$rawarray['bitrate'].')' : ''); - if ($rawarray['bitrate'] == 15) { - // known issue in LAME 3.90 - 3.93.1 where free-format has bitrate ID of 15 instead of 0 - // let it go through here otherwise file will not be identified - if (!$allowBitrate15) { - return false; - } - } else { - return false; - } - } - if (!isset($MPEGaudioFrequencyLookup[$decodedVersion][$rawarray['sample_rate']])) { - echo ($echoerrors ? "\n".'invalid Frequency ('.$rawarray['sample_rate'].')' : ''); - return false; - } - if (!isset($MPEGaudioChannelModeLookup[$rawarray['channelmode']])) { - echo ($echoerrors ? "\n".'invalid ChannelMode ('.$rawarray['channelmode'].')' : ''); - return false; - } - if (!isset($MPEGaudioModeExtensionLookup[$decodedLayer][$rawarray['modeextension']])) { - echo ($echoerrors ? "\n".'invalid Mode Extension ('.$rawarray['modeextension'].')' : ''); - return false; - } - if (!isset($MPEGaudioEmphasisLookup[$rawarray['emphasis']])) { - echo ($echoerrors ? "\n".'invalid Emphasis ('.$rawarray['emphasis'].')' : ''); - return false; - } - // These are just either set or not set, you can't mess that up :) - // $rawarray['protection']; - // $rawarray['padding']; - // $rawarray['private']; - // $rawarray['copyright']; - // $rawarray['original']; - - return true; - } - - function MPEGaudioHeaderDecode($Header4Bytes) { - // AAAA AAAA AAAB BCCD EEEE FFGH IIJJ KLMM - // A - Frame sync (all bits set) - // B - MPEG Audio version ID - // C - Layer description - // D - Protection bit - // E - Bitrate index - // F - Sampling rate frequency index - // G - Padding bit - // H - Private bit - // I - Channel Mode - // J - Mode extension (Only if Joint stereo) - // K - Copyright - // L - Original - // M - Emphasis - - if (strlen($Header4Bytes) != 4) { - return false; - } - - $MPEGrawHeader['synch'] = (getid3_lib::BigEndian2Int(substr($Header4Bytes, 0, 2)) & 0xFFE0) >> 4; - $MPEGrawHeader['version'] = (ord($Header4Bytes{1}) & 0x18) >> 3; // BB - $MPEGrawHeader['layer'] = (ord($Header4Bytes{1}) & 0x06) >> 1; // CC - $MPEGrawHeader['protection'] = (ord($Header4Bytes{1}) & 0x01); // D - $MPEGrawHeader['bitrate'] = (ord($Header4Bytes{2}) & 0xF0) >> 4; // EEEE - $MPEGrawHeader['sample_rate'] = (ord($Header4Bytes{2}) & 0x0C) >> 2; // FF - $MPEGrawHeader['padding'] = (ord($Header4Bytes{2}) & 0x02) >> 1; // G - $MPEGrawHeader['private'] = (ord($Header4Bytes{2}) & 0x01); // H - $MPEGrawHeader['channelmode'] = (ord($Header4Bytes{3}) & 0xC0) >> 6; // II - $MPEGrawHeader['modeextension'] = (ord($Header4Bytes{3}) & 0x30) >> 4; // JJ - $MPEGrawHeader['copyright'] = (ord($Header4Bytes{3}) & 0x08) >> 3; // K - $MPEGrawHeader['original'] = (ord($Header4Bytes{3}) & 0x04) >> 2; // L - $MPEGrawHeader['emphasis'] = (ord($Header4Bytes{3}) & 0x03); // MM - - return $MPEGrawHeader; - } - - function MPEGaudioFrameLength(&$bitrate, &$version, &$layer, $padding, &$samplerate) { - static $AudioFrameLengthCache = array(); - - if (!isset($AudioFrameLengthCache[$bitrate][$version][$layer][$padding][$samplerate])) { - $AudioFrameLengthCache[$bitrate][$version][$layer][$padding][$samplerate] = false; - if ($bitrate != 'free') { - - if ($version == '1') { - - if ($layer == '1') { - - // For Layer I slot is 32 bits long - $FrameLengthCoefficient = 48; - $SlotLength = 4; - - } else { // Layer 2 / 3 - - // for Layer 2 and Layer 3 slot is 8 bits long. - $FrameLengthCoefficient = 144; - $SlotLength = 1; - - } - - } else { // MPEG-2 / MPEG-2.5 - - if ($layer == '1') { - - // For Layer I slot is 32 bits long - $FrameLengthCoefficient = 24; - $SlotLength = 4; - - } elseif ($layer == '2') { - - // for Layer 2 and Layer 3 slot is 8 bits long. - $FrameLengthCoefficient = 144; - $SlotLength = 1; - - } else { // layer 3 - - // for Layer 2 and Layer 3 slot is 8 bits long. - $FrameLengthCoefficient = 72; - $SlotLength = 1; - - } - - } - - // FrameLengthInBytes = ((Coefficient * BitRate) / SampleRate) + Padding - if ($samplerate > 0) { - $NewFramelength = ($FrameLengthCoefficient * $bitrate) / $samplerate; - $NewFramelength = floor($NewFramelength / $SlotLength) * $SlotLength; // round to next-lower multiple of SlotLength (1 byte for Layer 2/3, 4 bytes for Layer I) - if ($padding) { - $NewFramelength += $SlotLength; - } - $AudioFrameLengthCache[$bitrate][$version][$layer][$padding][$samplerate] = (int) $NewFramelength; - } - } - } - return $AudioFrameLengthCache[$bitrate][$version][$layer][$padding][$samplerate]; - } - - function ClosestStandardMP3Bitrate($bitrate) { - static $StandardBitrates = array(320000, 256000, 224000, 192000, 160000, 128000, 112000, 96000, 80000, 64000, 56000, 48000, 40000, 32000, 24000, 16000, 8000); - static $BitrateTable = array(0=>'-'); - $roundbitrate = intval(round($bitrate, -3)); - if (!isset($BitrateTable[$roundbitrate])) { - if ($roundbitrate > 320000) { - $BitrateTable[$roundbitrate] = round($bitrate, -4); - } else { - $LastBitrate = 320000; - foreach ($StandardBitrates as $StandardBitrate) { - $BitrateTable[$roundbitrate] = $StandardBitrate; - if ($roundbitrate >= $StandardBitrate - (($LastBitrate - $StandardBitrate) / 2)) { - break; - } - $LastBitrate = $StandardBitrate; - } - } - } - return $BitrateTable[$roundbitrate]; - } - - function XingVBRidOffset($version, $channelmode) { - static $XingVBRidOffsetCache = array(); - if (empty($XingVBRidOffset)) { - $XingVBRidOffset = array ( - '1' => array ('mono' => 0x15, // 4 + 17 = 21 - 'stereo' => 0x24, // 4 + 32 = 36 - 'joint stereo' => 0x24, - 'dual channel' => 0x24 - ), - - '2' => array ('mono' => 0x0D, // 4 + 9 = 13 - 'stereo' => 0x15, // 4 + 17 = 21 - 'joint stereo' => 0x15, - 'dual channel' => 0x15 - ), - - '2.5' => array ('mono' => 0x15, - 'stereo' => 0x15, - 'joint stereo' => 0x15, - 'dual channel' => 0x15 - ) - ); - } - return $XingVBRidOffset[$version][$channelmode]; - } - - function LAMEvbrMethodLookup($VBRmethodID) { - static $LAMEvbrMethodLookup = array( - 0x00 => 'unknown', - 0x01 => 'cbr', - 0x02 => 'abr', - 0x03 => 'vbr-old / vbr-rh', - 0x04 => 'vbr-new / vbr-mtrh', - 0x05 => 'vbr-mt', - 0x06 => 'vbr (full vbr method 4)', - 0x08 => 'cbr (constant bitrate 2 pass)', - 0x09 => 'abr (2 pass)', - 0x0F => 'reserved' - ); - return (isset($LAMEvbrMethodLookup[$VBRmethodID]) ? $LAMEvbrMethodLookup[$VBRmethodID] : ''); - } - - function LAMEmiscStereoModeLookup($StereoModeID) { - static $LAMEmiscStereoModeLookup = array( - 0 => 'mono', - 1 => 'stereo', - 2 => 'dual mono', - 3 => 'joint stereo', - 4 => 'forced stereo', - 5 => 'auto', - 6 => 'intensity stereo', - 7 => 'other' - ); - return (isset($LAMEmiscStereoModeLookup[$StereoModeID]) ? $LAMEmiscStereoModeLookup[$StereoModeID] : ''); - } - - function LAMEmiscSourceSampleFrequencyLookup($SourceSampleFrequencyID) { - static $LAMEmiscSourceSampleFrequencyLookup = array( - 0 => '<= 32 kHz', - 1 => '44.1 kHz', - 2 => '48 kHz', - 3 => '> 48kHz' - ); - return (isset($LAMEmiscSourceSampleFrequencyLookup[$SourceSampleFrequencyID]) ? $LAMEmiscSourceSampleFrequencyLookup[$SourceSampleFrequencyID] : ''); - } - - function LAMEsurroundInfoLookup($SurroundInfoID) { - static $LAMEsurroundInfoLookup = array( - 0 => 'no surround info', - 1 => 'DPL encoding', - 2 => 'DPL2 encoding', - 3 => 'Ambisonic encoding' - ); - return (isset($LAMEsurroundInfoLookup[$SurroundInfoID]) ? $LAMEsurroundInfoLookup[$SurroundInfoID] : 'reserved'); - } - - function LAMEpresetUsedLookup($LAMEtag) { - - if ($LAMEtag['preset_used_id'] == 0) { - // no preset used (LAME >=3.93) - // no preset recorded (LAME <3.93) - return ''; - } - $LAMEpresetUsedLookup = array(); - - ///// THIS PART CANNOT BE STATIC . - for ($i = 8; $i <= 320; $i++) { - switch ($LAMEtag['vbr_method']) { - case 'cbr': - $LAMEpresetUsedLookup[$i] = '--alt-preset '.$LAMEtag['vbr_method'].' '.$i; - break; - case 'abr': - default: // other VBR modes shouldn't be here(?) - $LAMEpresetUsedLookup[$i] = '--alt-preset '.$i; - break; - } - } - - // named old-style presets (studio, phone, voice, etc) are handled in GuessEncoderOptions() - - // named alt-presets - $LAMEpresetUsedLookup[1000] = '--r3mix'; - $LAMEpresetUsedLookup[1001] = '--alt-preset standard'; - $LAMEpresetUsedLookup[1002] = '--alt-preset extreme'; - $LAMEpresetUsedLookup[1003] = '--alt-preset insane'; - $LAMEpresetUsedLookup[1004] = '--alt-preset fast standard'; - $LAMEpresetUsedLookup[1005] = '--alt-preset fast extreme'; - $LAMEpresetUsedLookup[1006] = '--alt-preset medium'; - $LAMEpresetUsedLookup[1007] = '--alt-preset fast medium'; - - // LAME 3.94 additions/changes - $LAMEpresetUsedLookup[1010] = '--preset portable'; // 3.94a15 Oct 21 2003 - $LAMEpresetUsedLookup[1015] = '--preset radio'; // 3.94a15 Oct 21 2003 - - $LAMEpresetUsedLookup[320] = '--preset insane'; // 3.94a15 Nov 12 2003 - $LAMEpresetUsedLookup[410] = '-V9'; - $LAMEpresetUsedLookup[420] = '-V8'; - $LAMEpresetUsedLookup[440] = '-V6'; - $LAMEpresetUsedLookup[430] = '--preset radio'; // 3.94a15 Nov 12 2003 - $LAMEpresetUsedLookup[450] = '--preset '.(($LAMEtag['raw']['vbr_method'] == 4) ? 'fast ' : '').'portable'; // 3.94a15 Nov 12 2003 - $LAMEpresetUsedLookup[460] = '--preset '.(($LAMEtag['raw']['vbr_method'] == 4) ? 'fast ' : '').'medium'; // 3.94a15 Nov 12 2003 - $LAMEpresetUsedLookup[470] = '--r3mix'; // 3.94b1 Dec 18 2003 - $LAMEpresetUsedLookup[480] = '--preset '.(($LAMEtag['raw']['vbr_method'] == 4) ? 'fast ' : '').'standard'; // 3.94a15 Nov 12 2003 - $LAMEpresetUsedLookup[490] = '-V1'; - $LAMEpresetUsedLookup[500] = '--preset '.(($LAMEtag['raw']['vbr_method'] == 4) ? 'fast ' : '').'extreme'; // 3.94a15 Nov 12 2003 - - return (isset($LAMEpresetUsedLookup[$LAMEtag['preset_used_id']]) ? $LAMEpresetUsedLookup[$LAMEtag['preset_used_id']] : 'new/unknown preset: '.$LAMEtag['preset_used_id'].' - report to info@getid3.org'); - } - -} - -?>
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