| author | ymh <ymh.work@gmail.com> |
| Mon, 08 Sep 2025 19:44:41 +0200 | |
| changeset 23 | 417f20492bf7 |
| parent 21 | 48c4eec2b7e6 |
| permissions | -rw-r--r-- |
| 0 | 1 |
<?php |
| 16 | 2 |
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| 0 | 3 |
///////////////////////////////////////////////////////////////// |
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/// getID3() by James Heinrich <info@getid3.org> // |
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| 16 | 5 |
// available at https://github.com/JamesHeinrich/getID3 // |
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// or https://www.getid3.org // |
|
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// or http://getid3.sourceforge.net // |
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// see readme.txt for more details // |
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///////////////////////////////////////////////////////////////// |
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// // |
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// module.audio.mp3.php // |
|
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// module for analyzing MP3 files // |
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// dependencies: NONE // |
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// /// |
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///////////////////////////////////////////////////////////////// |
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||
| 16 | 17 |
if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
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exit; |
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} |
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class getid3_mp3 extends getid3_handler |
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{
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/** |
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* Forces getID3() to scan the file byte-by-byte and log all the valid audio frame headers - extremely slow, |
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* unrecommended, but may provide data from otherwise-unusable files. |
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* |
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* @var bool |
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*/ |
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public $allow_bruteforce = false; |
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/** |
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* number of frames to scan to determine if MPEG-audio sequence is valid |
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* Lower this number to 5-20 for faster scanning |
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* Increase this number to 50+ for most accurate detection of valid VBR/CBR mpeg-audio streams |
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* |
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* @var int |
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*/ |
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public $mp3_valid_check_frames = 50; |
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/** |
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* @return bool |
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*/ |
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public function Analyze() {
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$info = &$this->getid3->info; |
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$initialOffset = $info['avdataoffset']; |
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if (!$this->getOnlyMPEGaudioInfo($info['avdataoffset'])) {
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if ($this->allow_bruteforce) {
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|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
51 |
$this->error('Rescanning file in BruteForce mode');
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$this->getOnlyMPEGaudioInfoBruteForce(); |
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} |
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} |
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if (isset($info['mpeg']['audio']['bitrate_mode'])) {
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$info['audio']['bitrate_mode'] = strtolower($info['mpeg']['audio']['bitrate_mode']); |
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} |
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$CurrentDataLAMEversionString = null; |
| 0 | 62 |
if (((isset($info['id3v2']['headerlength']) && ($info['avdataoffset'] > $info['id3v2']['headerlength'])) || (!isset($info['id3v2']) && ($info['avdataoffset'] > 0) && ($info['avdataoffset'] != $initialOffset)))) {
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$synchoffsetwarning = 'Unknown data before synch '; |
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if (isset($info['id3v2']['headerlength'])) {
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$synchoffsetwarning .= '(ID3v2 header ends at '.$info['id3v2']['headerlength'].', then '.($info['avdataoffset'] - $info['id3v2']['headerlength']).' bytes garbage, '; |
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} elseif ($initialOffset > 0) {
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$synchoffsetwarning .= '(should be at '.$initialOffset.', '; |
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} else {
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$synchoffsetwarning .= '(should be at beginning of file, '; |
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} |
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$synchoffsetwarning .= 'synch detected at '.$info['avdataoffset'].')'; |
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if (isset($info['audio']['bitrate_mode']) && ($info['audio']['bitrate_mode'] == 'cbr')) {
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if (!empty($info['id3v2']['headerlength']) && (($info['avdataoffset'] - $info['id3v2']['headerlength']) == $info['mpeg']['audio']['framelength'])) {
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$synchoffsetwarning .= '. This is a known problem with some versions of LAME (3.90-3.92) DLL in CBR mode.'; |
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$info['audio']['codec'] = 'LAME'; |
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$CurrentDataLAMEversionString = 'LAME3.'; |
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} elseif (empty($info['id3v2']['headerlength']) && ($info['avdataoffset'] == $info['mpeg']['audio']['framelength'])) {
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$synchoffsetwarning .= '. This is a known problem with some versions of LAME (3.90 - 3.92) DLL in CBR mode.'; |
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$info['audio']['codec'] = 'LAME'; |
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$CurrentDataLAMEversionString = 'LAME3.'; |
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} |
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} |
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7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
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$this->warning($synchoffsetwarning); |
| 0 | 91 |
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} |
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if (isset($info['mpeg']['audio']['LAME'])) {
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$info['audio']['codec'] = 'LAME'; |
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if (!empty($info['mpeg']['audio']['LAME']['long_version'])) {
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$info['audio']['encoder'] = rtrim($info['mpeg']['audio']['LAME']['long_version'], "\x00"); |
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} elseif (!empty($info['mpeg']['audio']['LAME']['short_version'])) {
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$info['audio']['encoder'] = rtrim($info['mpeg']['audio']['LAME']['short_version'], "\x00"); |
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} |
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} |
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$CurrentDataLAMEversionString = (!empty($CurrentDataLAMEversionString) ? $CurrentDataLAMEversionString : (isset($info['audio']['encoder']) ? $info['audio']['encoder'] : '')); |
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if (!empty($CurrentDataLAMEversionString) && (substr($CurrentDataLAMEversionString, 0, 6) == 'LAME3.') && !preg_match('[0-9\)]', substr($CurrentDataLAMEversionString, -1))) {
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// a version number of LAME that does not end with a number like "LAME3.92" |
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// or with a closing parenthesis like "LAME3.88 (alpha)" |
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// or a version of LAME with the LAMEtag-not-filled-in-DLL-mode bug (3.90-3.92) |
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// not sure what the actual last frame length will be, but will be less than or equal to 1441 |
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$PossiblyLongerLAMEversion_FrameLength = 1441; |
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// Not sure what version of LAME this is - look in padding of last frame for longer version string |
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$PossibleLAMEversionStringOffset = $info['avdataend'] - $PossiblyLongerLAMEversion_FrameLength; |
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$this->fseek($PossibleLAMEversionStringOffset); |
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$PossiblyLongerLAMEversion_Data = $this->fread($PossiblyLongerLAMEversion_FrameLength); |
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switch (substr($CurrentDataLAMEversionString, -1)) {
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case 'a': |
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case 'b': |
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// "LAME3.94a" will have a longer version string of "LAME3.94 (alpha)" for example |
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// need to trim off "a" to match longer string |
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$CurrentDataLAMEversionString = substr($CurrentDataLAMEversionString, 0, -1); |
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break; |
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} |
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if (($PossiblyLongerLAMEversion_String = strstr($PossiblyLongerLAMEversion_Data, $CurrentDataLAMEversionString)) !== false) {
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if (substr($PossiblyLongerLAMEversion_String, 0, strlen($CurrentDataLAMEversionString)) == $CurrentDataLAMEversionString) {
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$PossiblyLongerLAMEversion_NewString = substr($PossiblyLongerLAMEversion_String, 0, strspn($PossiblyLongerLAMEversion_String, 'LAME0123456789., (abcdefghijklmnopqrstuvwxyzJFSOND)')); //"LAME3.90.3" "LAME3.87 (beta 1, Sep 27 2000)" "LAME3.88 (beta)" |
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if (empty($info['audio']['encoder']) || (strlen($PossiblyLongerLAMEversion_NewString) > strlen($info['audio']['encoder']))) {
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if (!empty($info['audio']['encoder']) && !empty($info['mpeg']['audio']['LAME']['short_version']) && ($info['audio']['encoder'] == $info['mpeg']['audio']['LAME']['short_version'])) {
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if (preg_match('#^LAME[0-9\\.]+#', $PossiblyLongerLAMEversion_NewString, $matches)) {
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// "LAME3.100" -> "LAME3.100.1", but avoid including "(alpha)" and similar |
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$info['mpeg']['audio']['LAME']['short_version'] = $matches[0]; |
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} |
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} |
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$info['audio']['encoder'] = $PossiblyLongerLAMEversion_NewString; |
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} |
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} |
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} |
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} |
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if (!empty($info['audio']['encoder'])) {
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$info['audio']['encoder'] = rtrim($info['audio']['encoder'], "\x00 "); |
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} |
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switch (isset($info['mpeg']['audio']['layer']) ? $info['mpeg']['audio']['layer'] : '') {
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case 1: |
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case 2: |
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$info['audio']['dataformat'] = 'mp'.$info['mpeg']['audio']['layer']; |
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break; |
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} |
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if (isset($info['fileformat']) && ($info['fileformat'] == 'mp3')) {
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switch ($info['audio']['dataformat']) {
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case 'mp1': |
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case 'mp2': |
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case 'mp3': |
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$info['fileformat'] = $info['audio']['dataformat']; |
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break; |
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||
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default: |
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7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
158 |
$this->warning('Expecting [audio][dataformat] to be mp1/mp2/mp3 when fileformat == mp3, [audio][dataformat] actually "'.$info['audio']['dataformat'].'"');
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| 0 | 159 |
break; |
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} |
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} |
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if (empty($info['fileformat'])) {
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unset($info['fileformat']); |
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unset($info['audio']['bitrate_mode']); |
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unset($info['avdataoffset']); |
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unset($info['avdataend']); |
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return false; |
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} |
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$info['mime_type'] = 'audio/mpeg'; |
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$info['audio']['lossless'] = false; |
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// Calculate playtime |
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if (!isset($info['playtime_seconds']) && isset($info['audio']['bitrate']) && ($info['audio']['bitrate'] > 0)) {
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// https://github.com/JamesHeinrich/getID3/issues/161 |
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// VBR header frame contains ~0.026s of silent audio data, but is not actually part of the original encoding and should be ignored |
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$xingVBRheaderFrameLength = ((isset($info['mpeg']['audio']['VBR_frames']) && isset($info['mpeg']['audio']['framelength'])) ? $info['mpeg']['audio']['framelength'] : 0); |
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$info['playtime_seconds'] = ($info['avdataend'] - $info['avdataoffset'] - $xingVBRheaderFrameLength) * 8 / $info['audio']['bitrate']; |
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| 0 | 181 |
} |
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$info['audio']['encoder_options'] = $this->GuessEncoderOptions(); |
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return true; |
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} |
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| 16 | 188 |
/** |
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* @return string |
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*/ |
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| 0 | 191 |
public function GuessEncoderOptions() {
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// shortcuts |
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$info = &$this->getid3->info; |
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$thisfile_mpeg_audio = array(); |
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$thisfile_mpeg_audio_lame = array(); |
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| 0 | 196 |
if (!empty($info['mpeg']['audio'])) {
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$thisfile_mpeg_audio = &$info['mpeg']['audio']; |
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if (!empty($thisfile_mpeg_audio['LAME'])) {
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$thisfile_mpeg_audio_lame = &$thisfile_mpeg_audio['LAME']; |
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} |
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} |
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$encoder_options = ''; |
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static $NamedPresetBitrates = array(16, 24, 40, 56, 112, 128, 160, 192, 256); |
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if (isset($thisfile_mpeg_audio['VBR_method']) && ($thisfile_mpeg_audio['VBR_method'] == 'Fraunhofer') && !empty($thisfile_mpeg_audio['VBR_quality'])) {
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$encoder_options = 'VBR q'.$thisfile_mpeg_audio['VBR_quality']; |
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} elseif (!empty($thisfile_mpeg_audio_lame['preset_used']) && isset($thisfile_mpeg_audio_lame['preset_used_id']) && (!in_array($thisfile_mpeg_audio_lame['preset_used_id'], $NamedPresetBitrates))) {
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| 0 | 211 |
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$encoder_options = $thisfile_mpeg_audio_lame['preset_used']; |
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} elseif (!empty($thisfile_mpeg_audio_lame['vbr_quality'])) {
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static $KnownEncoderValues = array(); |
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if (empty($KnownEncoderValues)) {
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//$KnownEncoderValues[abrbitrate_minbitrate][vbr_quality][raw_vbr_method][raw_noise_shaping][raw_stereo_mode][ath_type][lowpass_frequency] = 'preset name'; |
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$KnownEncoderValues[0xFF][58][1][1][3][2][20500] = '--alt-preset insane'; // 3.90, 3.90.1, 3.92 |
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$KnownEncoderValues[0xFF][58][1][1][3][2][20600] = '--alt-preset insane'; // 3.90.2, 3.90.3, 3.91 |
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$KnownEncoderValues[0xFF][57][1][1][3][4][20500] = '--alt-preset insane'; // 3.94, 3.95 |
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$KnownEncoderValues['**'][78][3][2][3][2][19500] = '--alt-preset extreme'; // 3.90, 3.90.1, 3.92 |
|
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$KnownEncoderValues['**'][78][3][2][3][2][19600] = '--alt-preset extreme'; // 3.90.2, 3.91 |
|
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$KnownEncoderValues['**'][78][3][1][3][2][19600] = '--alt-preset extreme'; // 3.90.3 |
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$KnownEncoderValues['**'][78][4][2][3][2][19500] = '--alt-preset fast extreme'; // 3.90, 3.90.1, 3.92 |
|
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$KnownEncoderValues['**'][78][4][2][3][2][19600] = '--alt-preset fast extreme'; // 3.90.2, 3.90.3, 3.91 |
|
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$KnownEncoderValues['**'][78][3][2][3][4][19000] = '--alt-preset standard'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 |
|
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$KnownEncoderValues['**'][78][3][1][3][4][19000] = '--alt-preset standard'; // 3.90.3 |
|
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$KnownEncoderValues['**'][78][4][2][3][4][19000] = '--alt-preset fast standard'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 |
|
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$KnownEncoderValues['**'][78][4][1][3][4][19000] = '--alt-preset fast standard'; // 3.90.3 |
|
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$KnownEncoderValues['**'][88][4][1][3][3][19500] = '--r3mix'; // 3.90, 3.90.1, 3.92 |
|
233 |
$KnownEncoderValues['**'][88][4][1][3][3][19600] = '--r3mix'; // 3.90.2, 3.90.3, 3.91 |
|
234 |
$KnownEncoderValues['**'][67][4][1][3][4][18000] = '--r3mix'; // 3.94, 3.95 |
|
235 |
$KnownEncoderValues['**'][68][3][2][3][4][18000] = '--alt-preset medium'; // 3.90.3 |
|
236 |
$KnownEncoderValues['**'][68][4][2][3][4][18000] = '--alt-preset fast medium'; // 3.90.3 |
|
237 |
||
238 |
$KnownEncoderValues[0xFF][99][1][1][1][2][0] = '--preset studio'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 |
|
239 |
$KnownEncoderValues[0xFF][58][2][1][3][2][20600] = '--preset studio'; // 3.90.3, 3.93.1 |
|
240 |
$KnownEncoderValues[0xFF][58][2][1][3][2][20500] = '--preset studio'; // 3.93 |
|
241 |
$KnownEncoderValues[0xFF][57][2][1][3][4][20500] = '--preset studio'; // 3.94, 3.95 |
|
242 |
$KnownEncoderValues[0xC0][88][1][1][1][2][0] = '--preset cd'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 |
|
243 |
$KnownEncoderValues[0xC0][58][2][2][3][2][19600] = '--preset cd'; // 3.90.3, 3.93.1 |
|
244 |
$KnownEncoderValues[0xC0][58][2][2][3][2][19500] = '--preset cd'; // 3.93 |
|
245 |
$KnownEncoderValues[0xC0][57][2][1][3][4][19500] = '--preset cd'; // 3.94, 3.95 |
|
246 |
$KnownEncoderValues[0xA0][78][1][1][3][2][18000] = '--preset hifi'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 |
|
247 |
$KnownEncoderValues[0xA0][58][2][2][3][2][18000] = '--preset hifi'; // 3.90.3, 3.93, 3.93.1 |
|
248 |
$KnownEncoderValues[0xA0][57][2][1][3][4][18000] = '--preset hifi'; // 3.94, 3.95 |
|
249 |
$KnownEncoderValues[0x80][67][1][1][3][2][18000] = '--preset tape'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 |
|
250 |
$KnownEncoderValues[0x80][67][1][1][3][2][15000] = '--preset radio'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 |
|
251 |
$KnownEncoderValues[0x70][67][1][1][3][2][15000] = '--preset fm'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 |
|
252 |
$KnownEncoderValues[0x70][58][2][2][3][2][16000] = '--preset tape/radio/fm'; // 3.90.3, 3.93, 3.93.1 |
|
253 |
$KnownEncoderValues[0x70][57][2][1][3][4][16000] = '--preset tape/radio/fm'; // 3.94, 3.95 |
|
254 |
$KnownEncoderValues[0x38][58][2][2][0][2][10000] = '--preset voice'; // 3.90.3, 3.93, 3.93.1 |
|
255 |
$KnownEncoderValues[0x38][57][2][1][0][4][15000] = '--preset voice'; // 3.94, 3.95 |
|
256 |
$KnownEncoderValues[0x38][57][2][1][0][4][16000] = '--preset voice'; // 3.94a14 |
|
257 |
$KnownEncoderValues[0x28][65][1][1][0][2][7500] = '--preset mw-us'; // 3.90, 3.90.1, 3.92 |
|
258 |
$KnownEncoderValues[0x28][65][1][1][0][2][7600] = '--preset mw-us'; // 3.90.2, 3.91 |
|
259 |
$KnownEncoderValues[0x28][58][2][2][0][2][7000] = '--preset mw-us'; // 3.90.3, 3.93, 3.93.1 |
|
260 |
$KnownEncoderValues[0x28][57][2][1][0][4][10500] = '--preset mw-us'; // 3.94, 3.95 |
|
261 |
$KnownEncoderValues[0x28][57][2][1][0][4][11200] = '--preset mw-us'; // 3.94a14 |
|
262 |
$KnownEncoderValues[0x28][57][2][1][0][4][8800] = '--preset mw-us'; // 3.94a15 |
|
263 |
$KnownEncoderValues[0x18][58][2][2][0][2][4000] = '--preset phon+/lw/mw-eu/sw'; // 3.90.3, 3.93.1 |
|
264 |
$KnownEncoderValues[0x18][58][2][2][0][2][3900] = '--preset phon+/lw/mw-eu/sw'; // 3.93 |
|
265 |
$KnownEncoderValues[0x18][57][2][1][0][4][5900] = '--preset phon+/lw/mw-eu/sw'; // 3.94, 3.95 |
|
266 |
$KnownEncoderValues[0x18][57][2][1][0][4][6200] = '--preset phon+/lw/mw-eu/sw'; // 3.94a14 |
|
267 |
$KnownEncoderValues[0x18][57][2][1][0][4][3200] = '--preset phon+/lw/mw-eu/sw'; // 3.94a15 |
|
268 |
$KnownEncoderValues[0x10][58][2][2][0][2][3800] = '--preset phone'; // 3.90.3, 3.93.1 |
|
269 |
$KnownEncoderValues[0x10][58][2][2][0][2][3700] = '--preset phone'; // 3.93 |
|
270 |
$KnownEncoderValues[0x10][57][2][1][0][4][5600] = '--preset phone'; // 3.94, 3.95 |
|
271 |
} |
|
272 |
||
273 |
if (isset($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']])) {
|
|
274 |
||
275 |
$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']]; |
|
276 |
||
277 |
} 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']])) {
|
|
278 |
||
279 |
$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']][$thisfile_mpeg_audio_lame['lowpass_frequency']]; |
|
280 |
||
281 |
} elseif ($info['audio']['bitrate_mode'] == 'vbr') {
|
|
282 |
||
283 |
// http://gabriel.mp3-tech.org/mp3infotag.html |
|
284 |
// int Quality = (100 - 10 * gfp->VBR_q - gfp->quality)h |
|
285 |
||
286 |
||
287 |
$LAME_V_value = 10 - ceil($thisfile_mpeg_audio_lame['vbr_quality'] / 10); |
|
288 |
$LAME_q_value = 100 - $thisfile_mpeg_audio_lame['vbr_quality'] - ($LAME_V_value * 10); |
|
289 |
$encoder_options = '-V'.$LAME_V_value.' -q'.$LAME_q_value; |
|
290 |
||
291 |
} elseif ($info['audio']['bitrate_mode'] == 'cbr') {
|
|
292 |
||
293 |
$encoder_options = strtoupper($info['audio']['bitrate_mode']).ceil($info['audio']['bitrate'] / 1000); |
|
294 |
||
295 |
} else {
|
|
296 |
||
297 |
$encoder_options = strtoupper($info['audio']['bitrate_mode']); |
|
298 |
||
299 |
} |
|
300 |
||
301 |
} elseif (!empty($thisfile_mpeg_audio_lame['bitrate_abr'])) {
|
|
302 |
||
303 |
$encoder_options = 'ABR'.$thisfile_mpeg_audio_lame['bitrate_abr']; |
|
304 |
||
305 |
} elseif (!empty($info['audio']['bitrate'])) {
|
|
306 |
||
307 |
if ($info['audio']['bitrate_mode'] == 'cbr') {
|
|
| 19 | 308 |
$encoder_options = strtoupper($info['audio']['bitrate_mode']).round($info['audio']['bitrate'] / 1000); |
| 0 | 309 |
} else {
|
310 |
$encoder_options = strtoupper($info['audio']['bitrate_mode']); |
|
311 |
} |
|
312 |
||
313 |
} |
|
314 |
if (!empty($thisfile_mpeg_audio_lame['bitrate_min'])) {
|
|
315 |
$encoder_options .= ' -b'.$thisfile_mpeg_audio_lame['bitrate_min']; |
|
316 |
} |
|
317 |
||
|
21
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|
318 |
if (isset($thisfile_mpeg_audio['bitrate']) && $thisfile_mpeg_audio['bitrate'] === 'free') {
|
|
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ymh <ymh.work@gmail.com>
parents:
19
diff
changeset
|
319 |
$encoder_options .= ' --freeformat'; |
|
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Add CLAUDE.md documentation and sync WordPress core files
ymh <ymh.work@gmail.com>
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19
diff
changeset
|
320 |
} |
|
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Add CLAUDE.md documentation and sync WordPress core files
ymh <ymh.work@gmail.com>
parents:
19
diff
changeset
|
321 |
|
| 0 | 322 |
if (!empty($thisfile_mpeg_audio_lame['encoding_flags']['nogap_prev']) || !empty($thisfile_mpeg_audio_lame['encoding_flags']['nogap_next'])) {
|
323 |
$encoder_options .= ' --nogap'; |
|
324 |
} |
|
325 |
||
326 |
if (!empty($thisfile_mpeg_audio_lame['lowpass_frequency'])) {
|
|
327 |
$ExplodedOptions = explode(' ', $encoder_options, 4);
|
|
328 |
if ($ExplodedOptions[0] == '--r3mix') {
|
|
329 |
$ExplodedOptions[1] = 'r3mix'; |
|
330 |
} |
|
331 |
switch ($ExplodedOptions[0]) {
|
|
332 |
case '--preset': |
|
333 |
case '--alt-preset': |
|
334 |
case '--r3mix': |
|
335 |
if ($ExplodedOptions[1] == 'fast') {
|
|
336 |
$ExplodedOptions[1] .= ' '.$ExplodedOptions[2]; |
|
337 |
} |
|
338 |
switch ($ExplodedOptions[1]) {
|
|
339 |
case 'portable': |
|
340 |
case 'medium': |
|
341 |
case 'standard': |
|
342 |
case 'extreme': |
|
343 |
case 'insane': |
|
344 |
case 'fast portable': |
|
345 |
case 'fast medium': |
|
346 |
case 'fast standard': |
|
347 |
case 'fast extreme': |
|
348 |
case 'fast insane': |
|
349 |
case 'r3mix': |
|
350 |
static $ExpectedLowpass = array( |
|
351 |
'insane|20500' => 20500, |
|
352 |
'insane|20600' => 20600, // 3.90.2, 3.90.3, 3.91 |
|
353 |
'medium|18000' => 18000, |
|
354 |
'fast medium|18000' => 18000, |
|
355 |
'extreme|19500' => 19500, // 3.90, 3.90.1, 3.92, 3.95 |
|
356 |
'extreme|19600' => 19600, // 3.90.2, 3.90.3, 3.91, 3.93.1 |
|
357 |
'fast extreme|19500' => 19500, // 3.90, 3.90.1, 3.92, 3.95 |
|
358 |
'fast extreme|19600' => 19600, // 3.90.2, 3.90.3, 3.91, 3.93.1 |
|
359 |
'standard|19000' => 19000, |
|
360 |
'fast standard|19000' => 19000, |
|
361 |
'r3mix|19500' => 19500, // 3.90, 3.90.1, 3.92 |
|
362 |
'r3mix|19600' => 19600, // 3.90.2, 3.90.3, 3.91 |
|
363 |
'r3mix|18000' => 18000, // 3.94, 3.95 |
|
364 |
); |
|
365 |
if (!isset($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))) {
|
|
366 |
$encoder_options .= ' --lowpass '.$thisfile_mpeg_audio_lame['lowpass_frequency']; |
|
367 |
} |
|
368 |
break; |
|
369 |
||
370 |
default: |
|
371 |
break; |
|
372 |
} |
|
373 |
break; |
|
374 |
} |
|
375 |
} |
|
376 |
||
377 |
if (isset($thisfile_mpeg_audio_lame['raw']['source_sample_freq'])) {
|
|
378 |
if (($thisfile_mpeg_audio['sample_rate'] == 44100) && ($thisfile_mpeg_audio_lame['raw']['source_sample_freq'] != 1)) {
|
|
379 |
$encoder_options .= ' --resample 44100'; |
|
380 |
} elseif (($thisfile_mpeg_audio['sample_rate'] == 48000) && ($thisfile_mpeg_audio_lame['raw']['source_sample_freq'] != 2)) {
|
|
381 |
$encoder_options .= ' --resample 48000'; |
|
382 |
} elseif ($thisfile_mpeg_audio['sample_rate'] < 44100) {
|
|
383 |
switch ($thisfile_mpeg_audio_lame['raw']['source_sample_freq']) {
|
|
384 |
case 0: // <= 32000 |
|
385 |
// may or may not be same as source frequency - ignore |
|
386 |
break; |
|
387 |
case 1: // 44100 |
|
388 |
case 2: // 48000 |
|
389 |
case 3: // 48000+ |
|
390 |
$ExplodedOptions = explode(' ', $encoder_options, 4);
|
|
391 |
switch ($ExplodedOptions[0]) {
|
|
392 |
case '--preset': |
|
393 |
case '--alt-preset': |
|
394 |
switch ($ExplodedOptions[1]) {
|
|
395 |
case 'fast': |
|
396 |
case 'portable': |
|
397 |
case 'medium': |
|
398 |
case 'standard': |
|
399 |
case 'extreme': |
|
400 |
case 'insane': |
|
401 |
$encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate']; |
|
402 |
break; |
|
403 |
||
404 |
default: |
|
405 |
static $ExpectedResampledRate = array( |
|
406 |
'phon+/lw/mw-eu/sw|16000' => 16000, |
|
407 |
'mw-us|24000' => 24000, // 3.95 |
|
408 |
'mw-us|32000' => 32000, // 3.93 |
|
409 |
'mw-us|16000' => 16000, // 3.92 |
|
410 |
'phone|16000' => 16000, |
|
411 |
'phone|11025' => 11025, // 3.94a15 |
|
412 |
'radio|32000' => 32000, // 3.94a15 |
|
413 |
'fm/radio|32000' => 32000, // 3.92 |
|
414 |
'fm|32000' => 32000, // 3.90 |
|
415 |
'voice|32000' => 32000); |
|
416 |
if (!isset($ExpectedResampledRate[$ExplodedOptions[1].'|'.$thisfile_mpeg_audio['sample_rate']])) {
|
|
417 |
$encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate']; |
|
418 |
} |
|
419 |
break; |
|
420 |
} |
|
421 |
break; |
|
422 |
||
423 |
case '--r3mix': |
|
424 |
default: |
|
425 |
$encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate']; |
|
426 |
break; |
|
427 |
} |
|
428 |
break; |
|
429 |
} |
|
430 |
} |
|
431 |
} |
|
432 |
if (empty($encoder_options) && !empty($info['audio']['bitrate']) && !empty($info['audio']['bitrate_mode'])) {
|
|
433 |
//$encoder_options = strtoupper($info['audio']['bitrate_mode']).ceil($info['audio']['bitrate'] / 1000); |
|
434 |
$encoder_options = strtoupper($info['audio']['bitrate_mode']); |
|
435 |
} |
|
436 |
||
437 |
return $encoder_options; |
|
438 |
} |
|
439 |
||
| 16 | 440 |
/** |
441 |
* @param int $offset |
|
442 |
* @param array $info |
|
443 |
* @param bool $recursivesearch |
|
444 |
* @param bool $ScanAsCBR |
|
445 |
* @param bool $FastMPEGheaderScan |
|
446 |
* |
|
447 |
* @return bool |
|
448 |
*/ |
|
| 0 | 449 |
public function decodeMPEGaudioHeader($offset, &$info, $recursivesearch=true, $ScanAsCBR=false, $FastMPEGheaderScan=false) {
|
450 |
static $MPEGaudioVersionLookup; |
|
451 |
static $MPEGaudioLayerLookup; |
|
452 |
static $MPEGaudioBitrateLookup; |
|
453 |
static $MPEGaudioFrequencyLookup; |
|
454 |
static $MPEGaudioChannelModeLookup; |
|
455 |
static $MPEGaudioModeExtensionLookup; |
|
456 |
static $MPEGaudioEmphasisLookup; |
|
457 |
if (empty($MPEGaudioVersionLookup)) {
|
|
458 |
$MPEGaudioVersionLookup = self::MPEGaudioVersionArray(); |
|
459 |
$MPEGaudioLayerLookup = self::MPEGaudioLayerArray(); |
|
460 |
$MPEGaudioBitrateLookup = self::MPEGaudioBitrateArray(); |
|
461 |
$MPEGaudioFrequencyLookup = self::MPEGaudioFrequencyArray(); |
|
462 |
$MPEGaudioChannelModeLookup = self::MPEGaudioChannelModeArray(); |
|
463 |
$MPEGaudioModeExtensionLookup = self::MPEGaudioModeExtensionArray(); |
|
464 |
$MPEGaudioEmphasisLookup = self::MPEGaudioEmphasisArray(); |
|
465 |
} |
|
466 |
||
| 5 | 467 |
if ($this->fseek($offset) != 0) {
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
468 |
$this->error('decodeMPEGaudioHeader() failed to seek to next offset at '.$offset);
|
| 0 | 469 |
return false; |
470 |
} |
|
| 5 | 471 |
//$headerstring = $this->fread(1441); // worst-case max length = 32kHz @ 320kbps layer 3 = 1441 bytes/frame |
472 |
$headerstring = $this->fread(226); // LAME header at offset 36 + 190 bytes of Xing/LAME data |
|
| 0 | 473 |
|
474 |
// MP3 audio frame structure: |
|
475 |
// $aa $aa $aa $aa [$bb $bb] $cc... |
|
476 |
// where $aa..$aa is the four-byte mpeg-audio header (below) |
|
477 |
// $bb $bb is the optional 2-byte CRC |
|
478 |
// and $cc... is the audio data |
|
479 |
||
480 |
$head4 = substr($headerstring, 0, 4); |
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
481 |
$head4_key = getid3_lib::PrintHexBytes($head4, true, false, false); |
| 0 | 482 |
static $MPEGaudioHeaderDecodeCache = array(); |
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
483 |
if (isset($MPEGaudioHeaderDecodeCache[$head4_key])) {
|
|
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
484 |
$MPEGheaderRawArray = $MPEGaudioHeaderDecodeCache[$head4_key]; |
| 0 | 485 |
} else {
|
486 |
$MPEGheaderRawArray = self::MPEGaudioHeaderDecode($head4); |
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
487 |
$MPEGaudioHeaderDecodeCache[$head4_key] = $MPEGheaderRawArray; |
| 0 | 488 |
} |
489 |
||
490 |
static $MPEGaudioHeaderValidCache = array(); |
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
491 |
if (!isset($MPEGaudioHeaderValidCache[$head4_key])) { // Not in cache
|
|
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
492 |
//$MPEGaudioHeaderValidCache[$head4_key] = self::MPEGaudioHeaderValid($MPEGheaderRawArray, false, true); // allow badly-formatted freeformat (from LAME 3.90 - 3.93.1) |
|
cf61fcea0001
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ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
493 |
$MPEGaudioHeaderValidCache[$head4_key] = self::MPEGaudioHeaderValid($MPEGheaderRawArray, false, false); |
| 0 | 494 |
} |
495 |
||
496 |
// shortcut |
|
497 |
if (!isset($info['mpeg']['audio'])) {
|
|
498 |
$info['mpeg']['audio'] = array(); |
|
499 |
} |
|
500 |
$thisfile_mpeg_audio = &$info['mpeg']['audio']; |
|
501 |
||
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
502 |
if ($MPEGaudioHeaderValidCache[$head4_key]) {
|
| 0 | 503 |
$thisfile_mpeg_audio['raw'] = $MPEGheaderRawArray; |
504 |
} else {
|
|
| 19 | 505 |
$this->warning('Invalid MPEG audio header ('.getid3_lib::PrintHexBytes($head4).') at offset '.$offset);
|
| 0 | 506 |
return false; |
507 |
} |
|
508 |
||
509 |
if (!$FastMPEGheaderScan) {
|
|
510 |
$thisfile_mpeg_audio['version'] = $MPEGaudioVersionLookup[$thisfile_mpeg_audio['raw']['version']]; |
|
511 |
$thisfile_mpeg_audio['layer'] = $MPEGaudioLayerLookup[$thisfile_mpeg_audio['raw']['layer']]; |
|
512 |
||
513 |
$thisfile_mpeg_audio['channelmode'] = $MPEGaudioChannelModeLookup[$thisfile_mpeg_audio['raw']['channelmode']]; |
|
514 |
$thisfile_mpeg_audio['channels'] = (($thisfile_mpeg_audio['channelmode'] == 'mono') ? 1 : 2); |
|
515 |
$thisfile_mpeg_audio['sample_rate'] = $MPEGaudioFrequencyLookup[$thisfile_mpeg_audio['version']][$thisfile_mpeg_audio['raw']['sample_rate']]; |
|
516 |
$thisfile_mpeg_audio['protection'] = !$thisfile_mpeg_audio['raw']['protection']; |
|
517 |
$thisfile_mpeg_audio['private'] = (bool) $thisfile_mpeg_audio['raw']['private']; |
|
518 |
$thisfile_mpeg_audio['modeextension'] = $MPEGaudioModeExtensionLookup[$thisfile_mpeg_audio['layer']][$thisfile_mpeg_audio['raw']['modeextension']]; |
|
519 |
$thisfile_mpeg_audio['copyright'] = (bool) $thisfile_mpeg_audio['raw']['copyright']; |
|
520 |
$thisfile_mpeg_audio['original'] = (bool) $thisfile_mpeg_audio['raw']['original']; |
|
521 |
$thisfile_mpeg_audio['emphasis'] = $MPEGaudioEmphasisLookup[$thisfile_mpeg_audio['raw']['emphasis']]; |
|
522 |
||
523 |
$info['audio']['channels'] = $thisfile_mpeg_audio['channels']; |
|
524 |
$info['audio']['sample_rate'] = $thisfile_mpeg_audio['sample_rate']; |
|
525 |
||
526 |
if ($thisfile_mpeg_audio['protection']) {
|
|
527 |
$thisfile_mpeg_audio['crc'] = getid3_lib::BigEndian2Int(substr($headerstring, 4, 2)); |
|
528 |
} |
|
529 |
} |
|
530 |
||
531 |
if ($thisfile_mpeg_audio['raw']['bitrate'] == 15) {
|
|
532 |
// http://www.hydrogenaudio.org/?act=ST&f=16&t=9682&st=0 |
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
533 |
$this->warning('Invalid bitrate index (15), this is a known bug in free-format MP3s encoded by LAME v3.90 - 3.93.1');
|
| 0 | 534 |
$thisfile_mpeg_audio['raw']['bitrate'] = 0; |
535 |
} |
|
536 |
$thisfile_mpeg_audio['padding'] = (bool) $thisfile_mpeg_audio['raw']['padding']; |
|
537 |
$thisfile_mpeg_audio['bitrate'] = $MPEGaudioBitrateLookup[$thisfile_mpeg_audio['version']][$thisfile_mpeg_audio['layer']][$thisfile_mpeg_audio['raw']['bitrate']]; |
|
538 |
||
539 |
if (($thisfile_mpeg_audio['bitrate'] == 'free') && ($offset == $info['avdataoffset'])) {
|
|
540 |
// only skip multiple frame check if free-format bitstream found at beginning of file |
|
541 |
// otherwise is quite possibly simply corrupted data |
|
542 |
$recursivesearch = false; |
|
543 |
} |
|
544 |
||
545 |
// For Layer 2 there are some combinations of bitrate and mode which are not allowed. |
|
546 |
if (!$FastMPEGheaderScan && ($thisfile_mpeg_audio['layer'] == '2')) {
|
|
547 |
||
548 |
$info['audio']['dataformat'] = 'mp2'; |
|
549 |
switch ($thisfile_mpeg_audio['channelmode']) {
|
|
550 |
||
551 |
case 'mono': |
|
552 |
if (($thisfile_mpeg_audio['bitrate'] == 'free') || ($thisfile_mpeg_audio['bitrate'] <= 192000)) {
|
|
553 |
// these are ok |
|
554 |
} else {
|
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
555 |
$this->error($thisfile_mpeg_audio['bitrate'].'kbps not allowed in Layer 2, '.$thisfile_mpeg_audio['channelmode'].'.'); |
| 0 | 556 |
return false; |
557 |
} |
|
558 |
break; |
|
559 |
||
560 |
case 'stereo': |
|
561 |
case 'joint stereo': |
|
562 |
case 'dual channel': |
|
563 |
if (($thisfile_mpeg_audio['bitrate'] == 'free') || ($thisfile_mpeg_audio['bitrate'] == 64000) || ($thisfile_mpeg_audio['bitrate'] >= 96000)) {
|
|
564 |
// these are ok |
|
565 |
} else {
|
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
566 |
$this->error(intval(round($thisfile_mpeg_audio['bitrate'] / 1000)).'kbps not allowed in Layer 2, '.$thisfile_mpeg_audio['channelmode'].'.'); |
| 0 | 567 |
return false; |
568 |
} |
|
569 |
break; |
|
570 |
||
571 |
} |
|
572 |
||
573 |
} |
|
574 |
||
575 |
||
576 |
if ($info['audio']['sample_rate'] > 0) {
|
|
577 |
$thisfile_mpeg_audio['framelength'] = self::MPEGaudioFrameLength($thisfile_mpeg_audio['bitrate'], $thisfile_mpeg_audio['version'], $thisfile_mpeg_audio['layer'], (int) $thisfile_mpeg_audio['padding'], $info['audio']['sample_rate']); |
|
578 |
} |
|
579 |
||
580 |
$nextframetestoffset = $offset + 1; |
|
581 |
if ($thisfile_mpeg_audio['bitrate'] != 'free') {
|
|
582 |
||
583 |
$info['audio']['bitrate'] = $thisfile_mpeg_audio['bitrate']; |
|
584 |
||
585 |
if (isset($thisfile_mpeg_audio['framelength'])) {
|
|
586 |
$nextframetestoffset = $offset + $thisfile_mpeg_audio['framelength']; |
|
587 |
} else {
|
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
588 |
$this->error('Frame at offset('.$offset.') is has an invalid frame length.');
|
| 0 | 589 |
return false; |
590 |
} |
|
591 |
||
592 |
} |
|
593 |
||
594 |
$ExpectedNumberOfAudioBytes = 0; |
|
595 |
||
596 |
//////////////////////////////////////////////////////////////////////////////////// |
|
597 |
// Variable-bitrate headers |
|
598 |
||
599 |
if (substr($headerstring, 4 + 32, 4) == 'VBRI') {
|
|
600 |
// Fraunhofer VBR header is hardcoded 'VBRI' at offset 0x24 (36) |
|
601 |
// specs taken from http://minnie.tuhs.org/pipermail/mp3encoder/2001-January/001800.html |
|
602 |
||
603 |
$thisfile_mpeg_audio['bitrate_mode'] = 'vbr'; |
|
604 |
$thisfile_mpeg_audio['VBR_method'] = 'Fraunhofer'; |
|
| 16 | 605 |
$info['audio']['codec'] = 'Fraunhofer'; |
| 0 | 606 |
|
607 |
$SideInfoData = substr($headerstring, 4 + 2, 32); |
|
608 |
||
609 |
$FraunhoferVBROffset = 36; |
|
610 |
||
611 |
$thisfile_mpeg_audio['VBR_encoder_version'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 4, 2)); // VbriVersion |
|
612 |
$thisfile_mpeg_audio['VBR_encoder_delay'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 6, 2)); // VbriDelay |
|
613 |
$thisfile_mpeg_audio['VBR_quality'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 8, 2)); // VbriQuality |
|
614 |
$thisfile_mpeg_audio['VBR_bytes'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 10, 4)); // VbriStreamBytes |
|
615 |
$thisfile_mpeg_audio['VBR_frames'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 14, 4)); // VbriStreamFrames |
|
616 |
$thisfile_mpeg_audio['VBR_seek_offsets'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 18, 2)); // VbriTableSize |
|
617 |
$thisfile_mpeg_audio['VBR_seek_scale'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 20, 2)); // VbriTableScale |
|
618 |
$thisfile_mpeg_audio['VBR_entry_bytes'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 22, 2)); // VbriEntryBytes |
|
619 |
$thisfile_mpeg_audio['VBR_entry_frames'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 24, 2)); // VbriEntryFrames |
|
620 |
||
621 |
$ExpectedNumberOfAudioBytes = $thisfile_mpeg_audio['VBR_bytes']; |
|
622 |
||
623 |
$previousbyteoffset = $offset; |
|
624 |
for ($i = 0; $i < $thisfile_mpeg_audio['VBR_seek_offsets']; $i++) {
|
|
625 |
$Fraunhofer_OffsetN = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset, $thisfile_mpeg_audio['VBR_entry_bytes'])); |
|
626 |
$FraunhoferVBROffset += $thisfile_mpeg_audio['VBR_entry_bytes']; |
|
627 |
$thisfile_mpeg_audio['VBR_offsets_relative'][$i] = ($Fraunhofer_OffsetN * $thisfile_mpeg_audio['VBR_seek_scale']); |
|
628 |
$thisfile_mpeg_audio['VBR_offsets_absolute'][$i] = ($Fraunhofer_OffsetN * $thisfile_mpeg_audio['VBR_seek_scale']) + $previousbyteoffset; |
|
629 |
$previousbyteoffset += $Fraunhofer_OffsetN; |
|
630 |
} |
|
631 |
||
632 |
||
633 |
} else {
|
|
634 |
||
635 |
// Xing VBR header is hardcoded 'Xing' at a offset 0x0D (13), 0x15 (21) or 0x24 (36) |
|
636 |
// depending on MPEG layer and number of channels |
|
637 |
||
638 |
$VBRidOffset = self::XingVBRidOffset($thisfile_mpeg_audio['version'], $thisfile_mpeg_audio['channelmode']); |
|
639 |
$SideInfoData = substr($headerstring, 4 + 2, $VBRidOffset - 4); |
|
640 |
||
641 |
if ((substr($headerstring, $VBRidOffset, strlen('Xing')) == 'Xing') || (substr($headerstring, $VBRidOffset, strlen('Info')) == 'Info')) {
|
|
642 |
// 'Xing' is traditional Xing VBR frame |
|
643 |
// 'Info' is LAME-encoded CBR (This was done to avoid CBR files to be recognized as traditional Xing VBR files by some decoders.) |
|
644 |
// 'Info' *can* legally be used to specify a VBR file as well, however. |
|
645 |
||
646 |
// http://www.multiweb.cz/twoinches/MP3inside.htm |
|
647 |
//00..03 = "Xing" or "Info" |
|
648 |
//04..07 = Flags: |
|
649 |
// 0x01 Frames Flag set if value for number of frames in file is stored |
|
650 |
// 0x02 Bytes Flag set if value for filesize in bytes is stored |
|
651 |
// 0x04 TOC Flag set if values for TOC are stored |
|
652 |
// 0x08 VBR Scale Flag set if values for VBR scale is stored |
|
653 |
//08..11 Frames: Number of frames in file (including the first Xing/Info one) |
|
654 |
//12..15 Bytes: File length in Bytes |
|
655 |
//16..115 TOC (Table of Contents): |
|
656 |
// Contains of 100 indexes (one Byte length) for easier lookup in file. Approximately solves problem with moving inside file. |
|
657 |
// Each Byte has a value according this formula: |
|
658 |
// (TOC[i] / 256) * fileLenInBytes |
|
659 |
// So if song lasts eg. 240 sec. and you want to jump to 60. sec. (and file is 5 000 000 Bytes length) you can use: |
|
660 |
// TOC[(60/240)*100] = TOC[25] |
|
661 |
// and corresponding Byte in file is then approximately at: |
|
662 |
// (TOC[25]/256) * 5000000 |
|
663 |
//116..119 VBR Scale |
|
664 |
||
665 |
||
666 |
// should be safe to leave this at 'vbr' and let it be overriden to 'cbr' if a CBR preset/mode is used by LAME |
|
667 |
// if (substr($headerstring, $VBRidOffset, strlen('Info')) == 'Xing') {
|
|
668 |
$thisfile_mpeg_audio['bitrate_mode'] = 'vbr'; |
|
669 |
$thisfile_mpeg_audio['VBR_method'] = 'Xing'; |
|
670 |
// } else {
|
|
671 |
// $ScanAsCBR = true; |
|
672 |
// $thisfile_mpeg_audio['bitrate_mode'] = 'cbr'; |
|
673 |
// } |
|
674 |
||
675 |
$thisfile_mpeg_audio['xing_flags_raw'] = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset + 4, 4)); |
|
676 |
||
677 |
$thisfile_mpeg_audio['xing_flags']['frames'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000001); |
|
678 |
$thisfile_mpeg_audio['xing_flags']['bytes'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000002); |
|
679 |
$thisfile_mpeg_audio['xing_flags']['toc'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000004); |
|
680 |
$thisfile_mpeg_audio['xing_flags']['vbr_scale'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000008); |
|
681 |
||
682 |
if ($thisfile_mpeg_audio['xing_flags']['frames']) {
|
|
683 |
$thisfile_mpeg_audio['VBR_frames'] = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset + 8, 4)); |
|
684 |
//$thisfile_mpeg_audio['VBR_frames']--; // don't count header Xing/Info frame |
|
685 |
} |
|
686 |
if ($thisfile_mpeg_audio['xing_flags']['bytes']) {
|
|
687 |
$thisfile_mpeg_audio['VBR_bytes'] = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset + 12, 4)); |
|
688 |
} |
|
689 |
||
690 |
//if (($thisfile_mpeg_audio['bitrate'] == 'free') && !empty($thisfile_mpeg_audio['VBR_frames']) && !empty($thisfile_mpeg_audio['VBR_bytes'])) {
|
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
691 |
//if (!empty($thisfile_mpeg_audio['VBR_frames']) && !empty($thisfile_mpeg_audio['VBR_bytes'])) {
|
|
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
692 |
if (!empty($thisfile_mpeg_audio['VBR_frames'])) {
|
|
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
693 |
$used_filesize = 0; |
|
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
694 |
if (!empty($thisfile_mpeg_audio['VBR_bytes'])) {
|
|
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
695 |
$used_filesize = $thisfile_mpeg_audio['VBR_bytes']; |
|
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
696 |
} elseif (!empty($info['filesize'])) {
|
|
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
697 |
$used_filesize = $info['filesize']; |
| 16 | 698 |
$used_filesize -= (isset($info['id3v2']['headerlength']) ? intval($info['id3v2']['headerlength']) : 0); |
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
699 |
$used_filesize -= (isset($info['id3v1']) ? 128 : 0); |
|
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
700 |
$used_filesize -= (isset($info['tag_offset_end']) ? $info['tag_offset_end'] - $info['tag_offset_start'] : 0); |
|
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
701 |
$this->warning('MP3.Xing header missing VBR_bytes, assuming MPEG audio portion of file is '.number_format($used_filesize).' bytes');
|
|
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
702 |
} |
| 0 | 703 |
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
704 |
$framelengthfloat = $used_filesize / $thisfile_mpeg_audio['VBR_frames']; |
| 0 | 705 |
|
706 |
if ($thisfile_mpeg_audio['layer'] == '1') {
|
|
707 |
// BitRate = (((FrameLengthInBytes / 4) - Padding) * SampleRate) / 12 |
|
708 |
//$info['audio']['bitrate'] = ((($framelengthfloat / 4) - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 12; |
|
709 |
$info['audio']['bitrate'] = ($framelengthfloat / 4) * $thisfile_mpeg_audio['sample_rate'] * (2 / $info['audio']['channels']) / 12; |
|
710 |
} else {
|
|
711 |
// Bitrate = ((FrameLengthInBytes - Padding) * SampleRate) / 144 |
|
712 |
//$info['audio']['bitrate'] = (($framelengthfloat - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 144; |
|
713 |
$info['audio']['bitrate'] = $framelengthfloat * $thisfile_mpeg_audio['sample_rate'] * (2 / $info['audio']['channels']) / 144; |
|
714 |
} |
|
715 |
$thisfile_mpeg_audio['framelength'] = floor($framelengthfloat); |
|
716 |
} |
|
717 |
||
718 |
if ($thisfile_mpeg_audio['xing_flags']['toc']) {
|
|
719 |
$LAMEtocData = substr($headerstring, $VBRidOffset + 16, 100); |
|
720 |
for ($i = 0; $i < 100; $i++) {
|
|
| 16 | 721 |
$thisfile_mpeg_audio['toc'][$i] = ord($LAMEtocData[$i]); |
| 0 | 722 |
} |
723 |
} |
|
724 |
if ($thisfile_mpeg_audio['xing_flags']['vbr_scale']) {
|
|
725 |
$thisfile_mpeg_audio['VBR_scale'] = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset + 116, 4)); |
|
726 |
} |
|
727 |
||
728 |
||
729 |
// http://gabriel.mp3-tech.org/mp3infotag.html |
|
730 |
if (substr($headerstring, $VBRidOffset + 120, 4) == 'LAME') {
|
|
731 |
||
732 |
// shortcut |
|
733 |
$thisfile_mpeg_audio['LAME'] = array(); |
|
734 |
$thisfile_mpeg_audio_lame = &$thisfile_mpeg_audio['LAME']; |
|
735 |
||
736 |
||
737 |
$thisfile_mpeg_audio_lame['long_version'] = substr($headerstring, $VBRidOffset + 120, 20); |
|
738 |
$thisfile_mpeg_audio_lame['short_version'] = substr($thisfile_mpeg_audio_lame['long_version'], 0, 9); |
|
| 19 | 739 |
|
740 |
//$thisfile_mpeg_audio_lame['numeric_version'] = str_replace('LAME', '', $thisfile_mpeg_audio_lame['short_version']);
|
|
741 |
$thisfile_mpeg_audio_lame['numeric_version'] = ''; |
|
742 |
if (preg_match('#^LAME([0-9\\.a-z]*)#', $thisfile_mpeg_audio_lame['long_version'], $matches)) {
|
|
| 16 | 743 |
$thisfile_mpeg_audio_lame['short_version'] = $matches[0]; |
744 |
$thisfile_mpeg_audio_lame['numeric_version'] = $matches[1]; |
|
745 |
} |
|
| 19 | 746 |
if (strlen($thisfile_mpeg_audio_lame['numeric_version']) > 0) {
|
747 |
foreach (explode('.', $thisfile_mpeg_audio_lame['numeric_version']) as $key => $number) {
|
|
748 |
$thisfile_mpeg_audio_lame['integer_version'][$key] = intval($number); |
|
749 |
} |
|
750 |
//if ($thisfile_mpeg_audio_lame['short_version'] >= 'LAME3.90') {
|
|
751 |
if ((($thisfile_mpeg_audio_lame['integer_version'][0] * 1000) + $thisfile_mpeg_audio_lame['integer_version'][1]) >= 3090) { // cannot use string version compare, may have "LAME3.90" or "LAME3.100" -- see https://github.com/JamesHeinrich/getID3/issues/207
|
|
| 0 | 752 |
|
| 19 | 753 |
// extra 11 chars are not part of version string when LAMEtag present |
754 |
unset($thisfile_mpeg_audio_lame['long_version']); |
|
| 0 | 755 |
|
| 19 | 756 |
// It the LAME tag was only introduced in LAME v3.90 |
|
21
48c4eec2b7e6
Add CLAUDE.md documentation and sync WordPress core files
ymh <ymh.work@gmail.com>
parents:
19
diff
changeset
|
757 |
// https://wiki.hydrogenaud.io/index.php/LAME#VBR_header_and_LAME_tag |
|
48c4eec2b7e6
Add CLAUDE.md documentation and sync WordPress core files
ymh <ymh.work@gmail.com>
parents:
19
diff
changeset
|
758 |
// https://hydrogenaud.io/index.php?topic=9933 |
| 0 | 759 |
|
| 19 | 760 |
// Offsets of various bytes in http://gabriel.mp3-tech.org/mp3infotag.html |
761 |
// are assuming a 'Xing' identifier offset of 0x24, which is the case for |
|
762 |
// MPEG-1 non-mono, but not for other combinations |
|
763 |
$LAMEtagOffsetContant = $VBRidOffset - 0x24; |
|
| 0 | 764 |
|
| 19 | 765 |
// shortcuts |
766 |
$thisfile_mpeg_audio_lame['RGAD'] = array('track'=>array(), 'album'=>array());
|
|
767 |
$thisfile_mpeg_audio_lame_RGAD = &$thisfile_mpeg_audio_lame['RGAD']; |
|
768 |
$thisfile_mpeg_audio_lame_RGAD_track = &$thisfile_mpeg_audio_lame_RGAD['track']; |
|
769 |
$thisfile_mpeg_audio_lame_RGAD_album = &$thisfile_mpeg_audio_lame_RGAD['album']; |
|
770 |
$thisfile_mpeg_audio_lame['raw'] = array(); |
|
771 |
$thisfile_mpeg_audio_lame_raw = &$thisfile_mpeg_audio_lame['raw']; |
|
| 0 | 772 |
|
| 19 | 773 |
// byte $9B VBR Quality |
774 |
// This field is there to indicate a quality level, although the scale was not precised in the original Xing specifications. |
|
775 |
// Actually overwrites original Xing bytes |
|
776 |
unset($thisfile_mpeg_audio['VBR_scale']); |
|
777 |
$thisfile_mpeg_audio_lame['vbr_quality'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0x9B, 1)); |
|
| 0 | 778 |
|
| 19 | 779 |
// bytes $9C-$A4 Encoder short VersionString |
780 |
$thisfile_mpeg_audio_lame['short_version'] = substr($headerstring, $LAMEtagOffsetContant + 0x9C, 9); |
|
| 0 | 781 |
|
| 19 | 782 |
// byte $A5 Info Tag revision + VBR method |
783 |
$LAMEtagRevisionVBRmethod = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xA5, 1)); |
|
| 0 | 784 |
|
| 19 | 785 |
$thisfile_mpeg_audio_lame['tag_revision'] = ($LAMEtagRevisionVBRmethod & 0xF0) >> 4; |
786 |
$thisfile_mpeg_audio_lame_raw['vbr_method'] = $LAMEtagRevisionVBRmethod & 0x0F; |
|
787 |
$thisfile_mpeg_audio_lame['vbr_method'] = self::LAMEvbrMethodLookup($thisfile_mpeg_audio_lame_raw['vbr_method']); |
|
788 |
$thisfile_mpeg_audio['bitrate_mode'] = substr($thisfile_mpeg_audio_lame['vbr_method'], 0, 3); // usually either 'cbr' or 'vbr', but truncates 'vbr-old / vbr-rh' to 'vbr' |
|
| 0 | 789 |
|
| 19 | 790 |
// byte $A6 Lowpass filter value |
791 |
$thisfile_mpeg_audio_lame['lowpass_frequency'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xA6, 1)) * 100; |
|
| 0 | 792 |
|
| 19 | 793 |
// bytes $A7-$AE Replay Gain |
|
21
48c4eec2b7e6
Add CLAUDE.md documentation and sync WordPress core files
ymh <ymh.work@gmail.com>
parents:
19
diff
changeset
|
794 |
// https://web.archive.org/web/20021015212753/http://privatewww.essex.ac.uk/~djmrob/replaygain/rg_data_format.html |
| 19 | 795 |
// bytes $A7-$AA : 32 bit floating point "Peak signal amplitude" |
796 |
if ($thisfile_mpeg_audio_lame['short_version'] >= 'LAME3.94b') {
|
|
797 |
// LAME 3.94a16 and later - 9.23 fixed point |
|
798 |
// ie 0x0059E2EE / (2^23) = 5890798 / 8388608 = 0.7022378444671630859375 |
|
799 |
$thisfile_mpeg_audio_lame_RGAD['peak_amplitude'] = (float) ((getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xA7, 4))) / 8388608); |
|
800 |
} else {
|
|
801 |
// LAME 3.94a15 and earlier - 32-bit floating point |
|
802 |
// Actually 3.94a16 will fall in here too and be WRONG, but is hard to detect 3.94a16 vs 3.94a15 |
|
803 |
$thisfile_mpeg_audio_lame_RGAD['peak_amplitude'] = getid3_lib::LittleEndian2Float(substr($headerstring, $LAMEtagOffsetContant + 0xA7, 4)); |
|
804 |
} |
|
805 |
if ($thisfile_mpeg_audio_lame_RGAD['peak_amplitude'] == 0) {
|
|
806 |
unset($thisfile_mpeg_audio_lame_RGAD['peak_amplitude']); |
|
807 |
} else {
|
|
808 |
$thisfile_mpeg_audio_lame_RGAD['peak_db'] = getid3_lib::RGADamplitude2dB($thisfile_mpeg_audio_lame_RGAD['peak_amplitude']); |
|
809 |
} |
|
| 0 | 810 |
|
| 19 | 811 |
$thisfile_mpeg_audio_lame_raw['RGAD_track'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xAB, 2)); |
812 |
$thisfile_mpeg_audio_lame_raw['RGAD_album'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xAD, 2)); |
|
| 0 | 813 |
|
814 |
||
| 19 | 815 |
if ($thisfile_mpeg_audio_lame_raw['RGAD_track'] != 0) {
|
| 0 | 816 |
|
| 19 | 817 |
$thisfile_mpeg_audio_lame_RGAD_track['raw']['name'] = ($thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0xE000) >> 13; |
818 |
$thisfile_mpeg_audio_lame_RGAD_track['raw']['originator'] = ($thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0x1C00) >> 10; |
|
819 |
$thisfile_mpeg_audio_lame_RGAD_track['raw']['sign_bit'] = ($thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0x0200) >> 9; |
|
820 |
$thisfile_mpeg_audio_lame_RGAD_track['raw']['gain_adjust'] = $thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0x01FF; |
|
821 |
$thisfile_mpeg_audio_lame_RGAD_track['name'] = getid3_lib::RGADnameLookup($thisfile_mpeg_audio_lame_RGAD_track['raw']['name']); |
|
822 |
$thisfile_mpeg_audio_lame_RGAD_track['originator'] = getid3_lib::RGADoriginatorLookup($thisfile_mpeg_audio_lame_RGAD_track['raw']['originator']); |
|
823 |
$thisfile_mpeg_audio_lame_RGAD_track['gain_db'] = getid3_lib::RGADadjustmentLookup($thisfile_mpeg_audio_lame_RGAD_track['raw']['gain_adjust'], $thisfile_mpeg_audio_lame_RGAD_track['raw']['sign_bit']); |
|
| 0 | 824 |
|
| 19 | 825 |
if (!empty($thisfile_mpeg_audio_lame_RGAD['peak_amplitude'])) {
|
826 |
$info['replay_gain']['track']['peak'] = $thisfile_mpeg_audio_lame_RGAD['peak_amplitude']; |
|
827 |
} |
|
828 |
$info['replay_gain']['track']['originator'] = $thisfile_mpeg_audio_lame_RGAD_track['originator']; |
|
829 |
$info['replay_gain']['track']['adjustment'] = $thisfile_mpeg_audio_lame_RGAD_track['gain_db']; |
|
830 |
} else {
|
|
831 |
unset($thisfile_mpeg_audio_lame_RGAD['track']); |
|
| 0 | 832 |
} |
| 19 | 833 |
if ($thisfile_mpeg_audio_lame_raw['RGAD_album'] != 0) {
|
| 0 | 834 |
|
| 19 | 835 |
$thisfile_mpeg_audio_lame_RGAD_album['raw']['name'] = ($thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0xE000) >> 13; |
836 |
$thisfile_mpeg_audio_lame_RGAD_album['raw']['originator'] = ($thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0x1C00) >> 10; |
|
837 |
$thisfile_mpeg_audio_lame_RGAD_album['raw']['sign_bit'] = ($thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0x0200) >> 9; |
|
838 |
$thisfile_mpeg_audio_lame_RGAD_album['raw']['gain_adjust'] = $thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0x01FF; |
|
839 |
$thisfile_mpeg_audio_lame_RGAD_album['name'] = getid3_lib::RGADnameLookup($thisfile_mpeg_audio_lame_RGAD_album['raw']['name']); |
|
840 |
$thisfile_mpeg_audio_lame_RGAD_album['originator'] = getid3_lib::RGADoriginatorLookup($thisfile_mpeg_audio_lame_RGAD_album['raw']['originator']); |
|
841 |
$thisfile_mpeg_audio_lame_RGAD_album['gain_db'] = getid3_lib::RGADadjustmentLookup($thisfile_mpeg_audio_lame_RGAD_album['raw']['gain_adjust'], $thisfile_mpeg_audio_lame_RGAD_album['raw']['sign_bit']); |
|
| 0 | 842 |
|
| 19 | 843 |
if (!empty($thisfile_mpeg_audio_lame_RGAD['peak_amplitude'])) {
|
844 |
$info['replay_gain']['album']['peak'] = $thisfile_mpeg_audio_lame_RGAD['peak_amplitude']; |
|
845 |
} |
|
846 |
$info['replay_gain']['album']['originator'] = $thisfile_mpeg_audio_lame_RGAD_album['originator']; |
|
847 |
$info['replay_gain']['album']['adjustment'] = $thisfile_mpeg_audio_lame_RGAD_album['gain_db']; |
|
848 |
} else {
|
|
849 |
unset($thisfile_mpeg_audio_lame_RGAD['album']); |
|
| 0 | 850 |
} |
| 19 | 851 |
if (empty($thisfile_mpeg_audio_lame_RGAD)) {
|
852 |
unset($thisfile_mpeg_audio_lame['RGAD']); |
|
853 |
} |
|
| 0 | 854 |
|
855 |
||
| 19 | 856 |
// byte $AF Encoding flags + ATH Type |
857 |
$EncodingFlagsATHtype = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xAF, 1)); |
|
858 |
$thisfile_mpeg_audio_lame['encoding_flags']['nspsytune'] = (bool) ($EncodingFlagsATHtype & 0x10); |
|
859 |
$thisfile_mpeg_audio_lame['encoding_flags']['nssafejoint'] = (bool) ($EncodingFlagsATHtype & 0x20); |
|
860 |
$thisfile_mpeg_audio_lame['encoding_flags']['nogap_next'] = (bool) ($EncodingFlagsATHtype & 0x40); |
|
861 |
$thisfile_mpeg_audio_lame['encoding_flags']['nogap_prev'] = (bool) ($EncodingFlagsATHtype & 0x80); |
|
862 |
$thisfile_mpeg_audio_lame['ath_type'] = $EncodingFlagsATHtype & 0x0F; |
|
| 0 | 863 |
|
| 19 | 864 |
// byte $B0 if ABR {specified bitrate} else {minimal bitrate}
|
865 |
$thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB0, 1)); |
|
866 |
if ($thisfile_mpeg_audio_lame_raw['vbr_method'] == 2) { // Average BitRate (ABR)
|
|
867 |
$thisfile_mpeg_audio_lame['bitrate_abr'] = $thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate']; |
|
868 |
} elseif ($thisfile_mpeg_audio_lame_raw['vbr_method'] == 1) { // Constant BitRate (CBR)
|
|
869 |
// ignore |
|
870 |
} elseif ($thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate'] > 0) { // Variable BitRate (VBR) - minimum bitrate
|
|
871 |
$thisfile_mpeg_audio_lame['bitrate_min'] = $thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate']; |
|
872 |
} |
|
| 0 | 873 |
|
| 19 | 874 |
// bytes $B1-$B3 Encoder delays |
875 |
$EncoderDelays = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB1, 3)); |
|
876 |
$thisfile_mpeg_audio_lame['encoder_delay'] = ($EncoderDelays & 0xFFF000) >> 12; |
|
877 |
$thisfile_mpeg_audio_lame['end_padding'] = $EncoderDelays & 0x000FFF; |
|
| 0 | 878 |
|
| 19 | 879 |
// byte $B4 Misc |
880 |
$MiscByte = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB4, 1)); |
|
881 |
$thisfile_mpeg_audio_lame_raw['noise_shaping'] = ($MiscByte & 0x03); |
|
882 |
$thisfile_mpeg_audio_lame_raw['stereo_mode'] = ($MiscByte & 0x1C) >> 2; |
|
883 |
$thisfile_mpeg_audio_lame_raw['not_optimal_quality'] = ($MiscByte & 0x20) >> 5; |
|
884 |
$thisfile_mpeg_audio_lame_raw['source_sample_freq'] = ($MiscByte & 0xC0) >> 6; |
|
885 |
$thisfile_mpeg_audio_lame['noise_shaping'] = $thisfile_mpeg_audio_lame_raw['noise_shaping']; |
|
886 |
$thisfile_mpeg_audio_lame['stereo_mode'] = self::LAMEmiscStereoModeLookup($thisfile_mpeg_audio_lame_raw['stereo_mode']); |
|
887 |
$thisfile_mpeg_audio_lame['not_optimal_quality'] = (bool) $thisfile_mpeg_audio_lame_raw['not_optimal_quality']; |
|
888 |
$thisfile_mpeg_audio_lame['source_sample_freq'] = self::LAMEmiscSourceSampleFrequencyLookup($thisfile_mpeg_audio_lame_raw['source_sample_freq']); |
|
| 0 | 889 |
|
| 19 | 890 |
// byte $B5 MP3 Gain |
891 |
$thisfile_mpeg_audio_lame_raw['mp3_gain'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB5, 1), false, true); |
|
892 |
$thisfile_mpeg_audio_lame['mp3_gain_db'] = (getid3_lib::RGADamplitude2dB(2) / 4) * $thisfile_mpeg_audio_lame_raw['mp3_gain']; |
|
893 |
$thisfile_mpeg_audio_lame['mp3_gain_factor'] = pow(2, ($thisfile_mpeg_audio_lame['mp3_gain_db'] / 6)); |
|
| 0 | 894 |
|
| 19 | 895 |
// bytes $B6-$B7 Preset and surround info |
896 |
$PresetSurroundBytes = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB6, 2)); |
|
897 |
// Reserved = ($PresetSurroundBytes & 0xC000); |
|
898 |
$thisfile_mpeg_audio_lame_raw['surround_info'] = ($PresetSurroundBytes & 0x3800); |
|
899 |
$thisfile_mpeg_audio_lame['surround_info'] = self::LAMEsurroundInfoLookup($thisfile_mpeg_audio_lame_raw['surround_info']); |
|
900 |
$thisfile_mpeg_audio_lame['preset_used_id'] = ($PresetSurroundBytes & 0x07FF); |
|
901 |
$thisfile_mpeg_audio_lame['preset_used'] = self::LAMEpresetUsedLookup($thisfile_mpeg_audio_lame); |
|
902 |
if (!empty($thisfile_mpeg_audio_lame['preset_used_id']) && empty($thisfile_mpeg_audio_lame['preset_used'])) {
|
|
903 |
$this->warning('Unknown LAME preset used ('.$thisfile_mpeg_audio_lame['preset_used_id'].') - please report to info@getid3.org');
|
|
904 |
} |
|
905 |
if (($thisfile_mpeg_audio_lame['short_version'] == 'LAME3.90.') && !empty($thisfile_mpeg_audio_lame['preset_used_id'])) {
|
|
906 |
// this may change if 3.90.4 ever comes out |
|
907 |
$thisfile_mpeg_audio_lame['short_version'] = 'LAME3.90.3'; |
|
908 |
} |
|
| 0 | 909 |
|
| 19 | 910 |
// bytes $B8-$BB MusicLength |
911 |
$thisfile_mpeg_audio_lame['audio_bytes'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB8, 4)); |
|
912 |
$ExpectedNumberOfAudioBytes = (($thisfile_mpeg_audio_lame['audio_bytes'] > 0) ? $thisfile_mpeg_audio_lame['audio_bytes'] : $thisfile_mpeg_audio['VBR_bytes']); |
|
| 0 | 913 |
|
| 19 | 914 |
// bytes $BC-$BD MusicCRC |
915 |
$thisfile_mpeg_audio_lame['music_crc'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xBC, 2)); |
|
| 0 | 916 |
|
| 19 | 917 |
// bytes $BE-$BF CRC-16 of Info Tag |
918 |
$thisfile_mpeg_audio_lame['lame_tag_crc'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xBE, 2)); |
|
| 0 | 919 |
|
920 |
||
| 19 | 921 |
// LAME CBR |
|
21
48c4eec2b7e6
Add CLAUDE.md documentation and sync WordPress core files
ymh <ymh.work@gmail.com>
parents:
19
diff
changeset
|
922 |
if ($thisfile_mpeg_audio_lame_raw['vbr_method'] == 1 && $thisfile_mpeg_audio['bitrate'] !== 'free') {
|
| 0 | 923 |
|
| 19 | 924 |
$thisfile_mpeg_audio['bitrate_mode'] = 'cbr'; |
925 |
$thisfile_mpeg_audio['bitrate'] = self::ClosestStandardMP3Bitrate($thisfile_mpeg_audio['bitrate']); |
|
926 |
$info['audio']['bitrate'] = $thisfile_mpeg_audio['bitrate']; |
|
927 |
//if (empty($thisfile_mpeg_audio['bitrate']) || (!empty($thisfile_mpeg_audio_lame['bitrate_min']) && ($thisfile_mpeg_audio_lame['bitrate_min'] != 255))) {
|
|
928 |
// $thisfile_mpeg_audio['bitrate'] = $thisfile_mpeg_audio_lame['bitrate_min']; |
|
929 |
//} |
|
930 |
||
931 |
} |
|
| 0 | 932 |
|
933 |
} |
|
934 |
} |
|
935 |
} |
|
936 |
||
937 |
} else {
|
|
938 |
||
939 |
// not Fraunhofer or Xing VBR methods, most likely CBR (but could be VBR with no header) |
|
940 |
$thisfile_mpeg_audio['bitrate_mode'] = 'cbr'; |
|
941 |
if ($recursivesearch) {
|
|
942 |
$thisfile_mpeg_audio['bitrate_mode'] = 'vbr'; |
|
943 |
if ($this->RecursiveFrameScanning($offset, $nextframetestoffset, true)) {
|
|
944 |
$recursivesearch = false; |
|
945 |
$thisfile_mpeg_audio['bitrate_mode'] = 'cbr'; |
|
946 |
} |
|
947 |
if ($thisfile_mpeg_audio['bitrate_mode'] == 'vbr') {
|
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
948 |
$this->warning('VBR file with no VBR header. Bitrate values calculated from actual frame bitrates.');
|
| 0 | 949 |
} |
950 |
} |
|
951 |
||
952 |
} |
|
953 |
||
954 |
} |
|
955 |
||
956 |
if (($ExpectedNumberOfAudioBytes > 0) && ($ExpectedNumberOfAudioBytes != ($info['avdataend'] - $info['avdataoffset']))) {
|
|
957 |
if ($ExpectedNumberOfAudioBytes > ($info['avdataend'] - $info['avdataoffset'])) {
|
|
| 5 | 958 |
if ($this->isDependencyFor('matroska') || $this->isDependencyFor('riff')) {
|
| 0 | 959 |
// ignore, audio data is broken into chunks so will always be data "missing" |
| 5 | 960 |
} |
961 |
elseif (($ExpectedNumberOfAudioBytes - ($info['avdataend'] - $info['avdataoffset'])) == 1) {
|
|
962 |
$this->warning('Last byte of data truncated (this is a known bug in Meracl ID3 Tag Writer before v1.3.5)');
|
|
963 |
} |
|
964 |
else {
|
|
965 |
$this->warning('Probable truncated file: expecting '.$ExpectedNumberOfAudioBytes.' bytes of audio data, only found '.($info['avdataend'] - $info['avdataoffset']).' (short by '.($ExpectedNumberOfAudioBytes - ($info['avdataend'] - $info['avdataoffset'])).' bytes)');
|
|
| 0 | 966 |
} |
967 |
} else {
|
|
968 |
if ((($info['avdataend'] - $info['avdataoffset']) - $ExpectedNumberOfAudioBytes) == 1) {
|
|
| 5 | 969 |
// $prenullbytefileoffset = $this->ftell(); |
970 |
// $this->fseek($info['avdataend']); |
|
971 |
// $PossibleNullByte = $this->fread(1); |
|
972 |
// $this->fseek($prenullbytefileoffset); |
|
| 0 | 973 |
// if ($PossibleNullByte === "\x00") {
|
974 |
$info['avdataend']--; |
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
975 |
// $this->warning('Extra null byte at end of MP3 data assumed to be RIFF padding and therefore ignored');
|
| 0 | 976 |
// } else {
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
977 |
// $this->warning('Too much data in file: expecting '.$ExpectedNumberOfAudioBytes.' bytes of audio data, found '.($info['avdataend'] - $info['avdataoffset']).' ('.(($info['avdataend'] - $info['avdataoffset']) - $ExpectedNumberOfAudioBytes).' bytes too many)');
|
| 0 | 978 |
// } |
979 |
} else {
|
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
980 |
$this->warning('Too much data in file: expecting '.$ExpectedNumberOfAudioBytes.' bytes of audio data, found '.($info['avdataend'] - $info['avdataoffset']).' ('.(($info['avdataend'] - $info['avdataoffset']) - $ExpectedNumberOfAudioBytes).' bytes too many)');
|
| 0 | 981 |
} |
982 |
} |
|
983 |
} |
|
984 |
||
985 |
if (($thisfile_mpeg_audio['bitrate'] == 'free') && empty($info['audio']['bitrate'])) {
|
|
986 |
if (($offset == $info['avdataoffset']) && empty($thisfile_mpeg_audio['VBR_frames'])) {
|
|
987 |
$framebytelength = $this->FreeFormatFrameLength($offset, true); |
|
988 |
if ($framebytelength > 0) {
|
|
989 |
$thisfile_mpeg_audio['framelength'] = $framebytelength; |
|
990 |
if ($thisfile_mpeg_audio['layer'] == '1') {
|
|
991 |
// BitRate = (((FrameLengthInBytes / 4) - Padding) * SampleRate) / 12 |
|
992 |
$info['audio']['bitrate'] = ((($framebytelength / 4) - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 12; |
|
993 |
} else {
|
|
994 |
// Bitrate = ((FrameLengthInBytes - Padding) * SampleRate) / 144 |
|
995 |
$info['audio']['bitrate'] = (($framebytelength - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 144; |
|
996 |
} |
|
997 |
} else {
|
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
998 |
$this->error('Error calculating frame length of free-format MP3 without Xing/LAME header');
|
| 0 | 999 |
} |
1000 |
} |
|
1001 |
} |
|
1002 |
||
1003 |
if (isset($thisfile_mpeg_audio['VBR_frames']) ? $thisfile_mpeg_audio['VBR_frames'] : '') {
|
|
1004 |
switch ($thisfile_mpeg_audio['bitrate_mode']) {
|
|
1005 |
case 'vbr': |
|
1006 |
case 'abr': |
|
1007 |
$bytes_per_frame = 1152; |
|
1008 |
if (($thisfile_mpeg_audio['version'] == '1') && ($thisfile_mpeg_audio['layer'] == 1)) {
|
|
1009 |
$bytes_per_frame = 384; |
|
1010 |
} elseif ((($thisfile_mpeg_audio['version'] == '2') || ($thisfile_mpeg_audio['version'] == '2.5')) && ($thisfile_mpeg_audio['layer'] == 3)) {
|
|
1011 |
$bytes_per_frame = 576; |
|
1012 |
} |
|
1013 |
$thisfile_mpeg_audio['VBR_bitrate'] = (isset($thisfile_mpeg_audio['VBR_bytes']) ? (($thisfile_mpeg_audio['VBR_bytes'] / $thisfile_mpeg_audio['VBR_frames']) * 8) * ($info['audio']['sample_rate'] / $bytes_per_frame) : 0); |
|
1014 |
if ($thisfile_mpeg_audio['VBR_bitrate'] > 0) {
|
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
1015 |
$info['audio']['bitrate'] = $thisfile_mpeg_audio['VBR_bitrate']; |
| 0 | 1016 |
$thisfile_mpeg_audio['bitrate'] = $thisfile_mpeg_audio['VBR_bitrate']; // to avoid confusion |
1017 |
} |
|
1018 |
break; |
|
1019 |
} |
|
1020 |
} |
|
1021 |
||
1022 |
// End variable-bitrate headers |
|
1023 |
//////////////////////////////////////////////////////////////////////////////////// |
|
1024 |
||
1025 |
if ($recursivesearch) {
|
|
1026 |
||
1027 |
if (!$this->RecursiveFrameScanning($offset, $nextframetestoffset, $ScanAsCBR)) {
|
|
1028 |
return false; |
|
1029 |
} |
|
| 19 | 1030 |
if (!empty($this->getid3->info['mp3_validity_check_bitrates']) && !empty($thisfile_mpeg_audio['bitrate_mode']) && ($thisfile_mpeg_audio['bitrate_mode'] == 'vbr') && !empty($thisfile_mpeg_audio['VBR_bitrate'])) {
|
1031 |
// https://github.com/JamesHeinrich/getID3/issues/287 |
|
1032 |
if (count(array_keys($this->getid3->info['mp3_validity_check_bitrates'])) == 1) {
|
|
1033 |
list($cbr_bitrate_in_short_scan) = array_keys($this->getid3->info['mp3_validity_check_bitrates']); |
|
1034 |
$deviation_cbr_from_header_bitrate = abs($thisfile_mpeg_audio['VBR_bitrate'] - $cbr_bitrate_in_short_scan) / $cbr_bitrate_in_short_scan; |
|
1035 |
if ($deviation_cbr_from_header_bitrate < 0.01) {
|
|
1036 |
// VBR header bitrate may differ slightly from true bitrate of frames, perhaps accounting for overhead of VBR header frame itself? |
|
1037 |
// If measured CBR bitrate is within 1% of specified bitrate in VBR header then assume that file is truly CBR |
|
1038 |
$thisfile_mpeg_audio['bitrate_mode'] = 'cbr'; |
|
1039 |
//$this->warning('VBR header ignored, assuming CBR '.round($cbr_bitrate_in_short_scan / 1000).'kbps based on scan of '.$this->mp3_valid_check_frames.' frames');
|
|
1040 |
} |
|
1041 |
} |
|
1042 |
} |
|
1043 |
if (isset($this->getid3->info['mp3_validity_check_bitrates'])) {
|
|
1044 |
unset($this->getid3->info['mp3_validity_check_bitrates']); |
|
1045 |
} |
|
| 0 | 1046 |
|
1047 |
} |
|
1048 |
||
1049 |
||
1050 |
//if (false) {
|
|
1051 |
// // experimental side info parsing section - not returning anything useful yet |
|
1052 |
// |
|
1053 |
// $SideInfoBitstream = getid3_lib::BigEndian2Bin($SideInfoData); |
|
1054 |
// $SideInfoOffset = 0; |
|
1055 |
// |
|
1056 |
// if ($thisfile_mpeg_audio['version'] == '1') {
|
|
1057 |
// if ($thisfile_mpeg_audio['channelmode'] == 'mono') {
|
|
1058 |
// // MPEG-1 (mono) |
|
1059 |
// $thisfile_mpeg_audio['side_info']['main_data_begin'] = substr($SideInfoBitstream, $SideInfoOffset, 9); |
|
1060 |
// $SideInfoOffset += 9; |
|
1061 |
// $SideInfoOffset += 5; |
|
1062 |
// } else {
|
|
1063 |
// // MPEG-1 (stereo, joint-stereo, dual-channel) |
|
1064 |
// $thisfile_mpeg_audio['side_info']['main_data_begin'] = substr($SideInfoBitstream, $SideInfoOffset, 9); |
|
1065 |
// $SideInfoOffset += 9; |
|
1066 |
// $SideInfoOffset += 3; |
|
1067 |
// } |
|
1068 |
// } else { // 2 or 2.5
|
|
1069 |
// if ($thisfile_mpeg_audio['channelmode'] == 'mono') {
|
|
1070 |
// // MPEG-2, MPEG-2.5 (mono) |
|
1071 |
// $thisfile_mpeg_audio['side_info']['main_data_begin'] = substr($SideInfoBitstream, $SideInfoOffset, 8); |
|
1072 |
// $SideInfoOffset += 8; |
|
1073 |
// $SideInfoOffset += 1; |
|
1074 |
// } else {
|
|
1075 |
// // MPEG-2, MPEG-2.5 (stereo, joint-stereo, dual-channel) |
|
1076 |
// $thisfile_mpeg_audio['side_info']['main_data_begin'] = substr($SideInfoBitstream, $SideInfoOffset, 8); |
|
1077 |
// $SideInfoOffset += 8; |
|
1078 |
// $SideInfoOffset += 2; |
|
1079 |
// } |
|
1080 |
// } |
|
1081 |
// |
|
1082 |
// if ($thisfile_mpeg_audio['version'] == '1') {
|
|
1083 |
// for ($channel = 0; $channel < $info['audio']['channels']; $channel++) {
|
|
1084 |
// for ($scfsi_band = 0; $scfsi_band < 4; $scfsi_band++) {
|
|
1085 |
// $thisfile_mpeg_audio['scfsi'][$channel][$scfsi_band] = substr($SideInfoBitstream, $SideInfoOffset, 1); |
|
1086 |
// $SideInfoOffset += 2; |
|
1087 |
// } |
|
1088 |
// } |
|
1089 |
// } |
|
1090 |
// for ($granule = 0; $granule < (($thisfile_mpeg_audio['version'] == '1') ? 2 : 1); $granule++) {
|
|
1091 |
// for ($channel = 0; $channel < $info['audio']['channels']; $channel++) {
|
|
1092 |
// $thisfile_mpeg_audio['part2_3_length'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 12); |
|
1093 |
// $SideInfoOffset += 12; |
|
1094 |
// $thisfile_mpeg_audio['big_values'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 9); |
|
1095 |
// $SideInfoOffset += 9; |
|
1096 |
// $thisfile_mpeg_audio['global_gain'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 8); |
|
1097 |
// $SideInfoOffset += 8; |
|
1098 |
// if ($thisfile_mpeg_audio['version'] == '1') {
|
|
1099 |
// $thisfile_mpeg_audio['scalefac_compress'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 4); |
|
1100 |
// $SideInfoOffset += 4; |
|
1101 |
// } else {
|
|
1102 |
// $thisfile_mpeg_audio['scalefac_compress'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 9); |
|
1103 |
// $SideInfoOffset += 9; |
|
1104 |
// } |
|
1105 |
// $thisfile_mpeg_audio['window_switching_flag'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1); |
|
1106 |
// $SideInfoOffset += 1; |
|
1107 |
// |
|
1108 |
// if ($thisfile_mpeg_audio['window_switching_flag'][$granule][$channel] == '1') {
|
|
1109 |
// |
|
1110 |
// $thisfile_mpeg_audio['block_type'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 2); |
|
1111 |
// $SideInfoOffset += 2; |
|
1112 |
// $thisfile_mpeg_audio['mixed_block_flag'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1); |
|
1113 |
// $SideInfoOffset += 1; |
|
1114 |
// |
|
1115 |
// for ($region = 0; $region < 2; $region++) {
|
|
1116 |
// $thisfile_mpeg_audio['table_select'][$granule][$channel][$region] = substr($SideInfoBitstream, $SideInfoOffset, 5); |
|
1117 |
// $SideInfoOffset += 5; |
|
1118 |
// } |
|
1119 |
// $thisfile_mpeg_audio['table_select'][$granule][$channel][2] = 0; |
|
1120 |
// |
|
1121 |
// for ($window = 0; $window < 3; $window++) {
|
|
1122 |
// $thisfile_mpeg_audio['subblock_gain'][$granule][$channel][$window] = substr($SideInfoBitstream, $SideInfoOffset, 3); |
|
1123 |
// $SideInfoOffset += 3; |
|
1124 |
// } |
|
1125 |
// |
|
1126 |
// } else {
|
|
1127 |
// |
|
1128 |
// for ($region = 0; $region < 3; $region++) {
|
|
1129 |
// $thisfile_mpeg_audio['table_select'][$granule][$channel][$region] = substr($SideInfoBitstream, $SideInfoOffset, 5); |
|
1130 |
// $SideInfoOffset += 5; |
|
1131 |
// } |
|
1132 |
// |
|
1133 |
// $thisfile_mpeg_audio['region0_count'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 4); |
|
1134 |
// $SideInfoOffset += 4; |
|
1135 |
// $thisfile_mpeg_audio['region1_count'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 3); |
|
1136 |
// $SideInfoOffset += 3; |
|
1137 |
// $thisfile_mpeg_audio['block_type'][$granule][$channel] = 0; |
|
1138 |
// } |
|
1139 |
// |
|
1140 |
// if ($thisfile_mpeg_audio['version'] == '1') {
|
|
1141 |
// $thisfile_mpeg_audio['preflag'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1); |
|
1142 |
// $SideInfoOffset += 1; |
|
1143 |
// } |
|
1144 |
// $thisfile_mpeg_audio['scalefac_scale'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1); |
|
1145 |
// $SideInfoOffset += 1; |
|
1146 |
// $thisfile_mpeg_audio['count1table_select'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1); |
|
1147 |
// $SideInfoOffset += 1; |
|
1148 |
// } |
|
1149 |
// } |
|
1150 |
//} |
|
1151 |
||
1152 |
return true; |
|
1153 |
} |
|
1154 |
||
| 16 | 1155 |
/** |
1156 |
* @param int $offset |
|
1157 |
* @param int $nextframetestoffset |
|
1158 |
* @param bool $ScanAsCBR |
|
1159 |
* |
|
1160 |
* @return bool |
|
1161 |
*/ |
|
| 0 | 1162 |
public function RecursiveFrameScanning(&$offset, &$nextframetestoffset, $ScanAsCBR) {
|
1163 |
$info = &$this->getid3->info; |
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
1164 |
$firstframetestarray = array('error' => array(), 'warning'=> array(), 'avdataend' => $info['avdataend'], 'avdataoffset' => $info['avdataoffset']);
|
| 0 | 1165 |
$this->decodeMPEGaudioHeader($offset, $firstframetestarray, false); |
1166 |
||
| 19 | 1167 |
$info['mp3_validity_check_bitrates'] = array(); |
1168 |
for ($i = 0; $i < $this->mp3_valid_check_frames; $i++) {
|
|
1169 |
// check next (default: 50) frames for validity, to make sure we haven't run across a false synch |
|
| 0 | 1170 |
if (($nextframetestoffset + 4) >= $info['avdataend']) {
|
1171 |
// end of file |
|
1172 |
return true; |
|
1173 |
} |
|
1174 |
||
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
1175 |
$nextframetestarray = array('error' => array(), 'warning' => array(), 'avdataend' => $info['avdataend'], 'avdataoffset'=>$info['avdataoffset']);
|
| 0 | 1176 |
if ($this->decodeMPEGaudioHeader($nextframetestoffset, $nextframetestarray, false)) {
|
|
21
48c4eec2b7e6
Add CLAUDE.md documentation and sync WordPress core files
ymh <ymh.work@gmail.com>
parents:
19
diff
changeset
|
1177 |
/** @phpstan-ignore-next-line */ |
| 19 | 1178 |
getid3_lib::safe_inc($info['mp3_validity_check_bitrates'][$nextframetestarray['mpeg']['audio']['bitrate']]); |
| 0 | 1179 |
if ($ScanAsCBR) {
|
1180 |
// force CBR mode, used for trying to pick out invalid audio streams with valid(?) VBR headers, or VBR streams with no VBR header |
|
1181 |
if (!isset($nextframetestarray['mpeg']['audio']['bitrate']) || !isset($firstframetestarray['mpeg']['audio']['bitrate']) || ($nextframetestarray['mpeg']['audio']['bitrate'] != $firstframetestarray['mpeg']['audio']['bitrate'])) {
|
|
1182 |
return false; |
|
1183 |
} |
|
1184 |
} |
|
1185 |
||
1186 |
||
1187 |
// next frame is OK, get ready to check the one after that |
|
1188 |
if (isset($nextframetestarray['mpeg']['audio']['framelength']) && ($nextframetestarray['mpeg']['audio']['framelength'] > 0)) {
|
|
1189 |
$nextframetestoffset += $nextframetestarray['mpeg']['audio']['framelength']; |
|
1190 |
} else {
|
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
1191 |
$this->error('Frame at offset ('.$offset.') is has an invalid frame length.');
|
| 0 | 1192 |
return false; |
1193 |
} |
|
1194 |
||
1195 |
} elseif (!empty($firstframetestarray['mpeg']['audio']['framelength']) && (($nextframetestoffset + $firstframetestarray['mpeg']['audio']['framelength']) > $info['avdataend'])) {
|
|
1196 |
||
1197 |
// it's not the end of the file, but there's not enough data left for another frame, so assume it's garbage/padding and return OK |
|
1198 |
return true; |
|
1199 |
||
1200 |
} else {
|
|
1201 |
||
1202 |
// next frame is not valid, note the error and fail, so scanning can contiue for a valid frame sequence |
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
1203 |
$this->warning('Frame at offset ('.$offset.') is valid, but the next one at ('.$nextframetestoffset.') is not.');
|
| 0 | 1204 |
|
1205 |
return false; |
|
1206 |
} |
|
1207 |
} |
|
1208 |
return true; |
|
1209 |
} |
|
1210 |
||
| 16 | 1211 |
/** |
1212 |
* @param int $offset |
|
1213 |
* @param bool $deepscan |
|
1214 |
* |
|
1215 |
* @return int|false |
|
1216 |
*/ |
|
| 0 | 1217 |
public function FreeFormatFrameLength($offset, $deepscan=false) {
|
1218 |
$info = &$this->getid3->info; |
|
1219 |
||
| 5 | 1220 |
$this->fseek($offset); |
1221 |
$MPEGaudioData = $this->fread(32768); |
|
| 0 | 1222 |
|
1223 |
$SyncPattern1 = substr($MPEGaudioData, 0, 4); |
|
1224 |
// may be different pattern due to padding |
|
| 16 | 1225 |
$SyncPattern2 = $SyncPattern1[0].$SyncPattern1[1].chr(ord($SyncPattern1[2]) | 0x02).$SyncPattern1[3]; |
| 0 | 1226 |
if ($SyncPattern2 === $SyncPattern1) {
|
| 16 | 1227 |
$SyncPattern2 = $SyncPattern1[0].$SyncPattern1[1].chr(ord($SyncPattern1[2]) & 0xFD).$SyncPattern1[3]; |
| 0 | 1228 |
} |
1229 |
||
1230 |
$framelength = false; |
|
1231 |
$framelength1 = strpos($MPEGaudioData, $SyncPattern1, 4); |
|
1232 |
$framelength2 = strpos($MPEGaudioData, $SyncPattern2, 4); |
|
1233 |
if ($framelength1 > 4) {
|
|
1234 |
$framelength = $framelength1; |
|
1235 |
} |
|
1236 |
if (($framelength2 > 4) && ($framelength2 < $framelength1)) {
|
|
1237 |
$framelength = $framelength2; |
|
1238 |
} |
|
1239 |
if (!$framelength) {
|
|
1240 |
||
1241 |
// LAME 3.88 has a different value for modeextension on the first frame vs the rest |
|
1242 |
$framelength1 = strpos($MPEGaudioData, substr($SyncPattern1, 0, 3), 4); |
|
1243 |
$framelength2 = strpos($MPEGaudioData, substr($SyncPattern2, 0, 3), 4); |
|
1244 |
||
1245 |
if ($framelength1 > 4) {
|
|
1246 |
$framelength = $framelength1; |
|
1247 |
} |
|
1248 |
if (($framelength2 > 4) && ($framelength2 < $framelength1)) {
|
|
1249 |
$framelength = $framelength2; |
|
1250 |
} |
|
1251 |
if (!$framelength) {
|
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
1252 |
$this->error('Cannot find next free-format synch pattern ('.getid3_lib::PrintHexBytes($SyncPattern1).' or '.getid3_lib::PrintHexBytes($SyncPattern2).') after offset '.$offset);
|
| 0 | 1253 |
return false; |
1254 |
} else {
|
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
1255 |
$this->warning('ModeExtension varies between first frame and other frames (known free-format issue in LAME 3.88)');
|
| 0 | 1256 |
$info['audio']['codec'] = 'LAME'; |
1257 |
$info['audio']['encoder'] = 'LAME3.88'; |
|
1258 |
$SyncPattern1 = substr($SyncPattern1, 0, 3); |
|
1259 |
$SyncPattern2 = substr($SyncPattern2, 0, 3); |
|
1260 |
} |
|
1261 |
} |
|
1262 |
||
1263 |
if ($deepscan) {
|
|
1264 |
||
1265 |
$ActualFrameLengthValues = array(); |
|
1266 |
$nextoffset = $offset + $framelength; |
|
1267 |
while ($nextoffset < ($info['avdataend'] - 6)) {
|
|
| 5 | 1268 |
$this->fseek($nextoffset - 1); |
1269 |
$NextSyncPattern = $this->fread(6); |
|
| 0 | 1270 |
if ((substr($NextSyncPattern, 1, strlen($SyncPattern1)) == $SyncPattern1) || (substr($NextSyncPattern, 1, strlen($SyncPattern2)) == $SyncPattern2)) {
|
1271 |
// good - found where expected |
|
1272 |
$ActualFrameLengthValues[] = $framelength; |
|
1273 |
} elseif ((substr($NextSyncPattern, 0, strlen($SyncPattern1)) == $SyncPattern1) || (substr($NextSyncPattern, 0, strlen($SyncPattern2)) == $SyncPattern2)) {
|
|
1274 |
// ok - found one byte earlier than expected (last frame wasn't padded, first frame was) |
|
1275 |
$ActualFrameLengthValues[] = ($framelength - 1); |
|
1276 |
$nextoffset--; |
|
1277 |
} elseif ((substr($NextSyncPattern, 2, strlen($SyncPattern1)) == $SyncPattern1) || (substr($NextSyncPattern, 2, strlen($SyncPattern2)) == $SyncPattern2)) {
|
|
1278 |
// ok - found one byte later than expected (last frame was padded, first frame wasn't) |
|
1279 |
$ActualFrameLengthValues[] = ($framelength + 1); |
|
1280 |
$nextoffset++; |
|
1281 |
} else {
|
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
1282 |
$this->error('Did not find expected free-format sync pattern at offset '.$nextoffset);
|
| 0 | 1283 |
return false; |
1284 |
} |
|
1285 |
$nextoffset += $framelength; |
|
1286 |
} |
|
1287 |
if (count($ActualFrameLengthValues) > 0) {
|
|
1288 |
$framelength = intval(round(array_sum($ActualFrameLengthValues) / count($ActualFrameLengthValues))); |
|
1289 |
} |
|
1290 |
} |
|
1291 |
return $framelength; |
|
1292 |
} |
|
1293 |
||
| 16 | 1294 |
/** |
1295 |
* @return bool |
|
1296 |
*/ |
|
| 0 | 1297 |
public function getOnlyMPEGaudioInfoBruteForce() {
|
1298 |
$MPEGaudioHeaderDecodeCache = array(); |
|
1299 |
$MPEGaudioHeaderValidCache = array(); |
|
1300 |
$MPEGaudioHeaderLengthCache = array(); |
|
1301 |
$MPEGaudioVersionLookup = self::MPEGaudioVersionArray(); |
|
1302 |
$MPEGaudioLayerLookup = self::MPEGaudioLayerArray(); |
|
1303 |
$MPEGaudioBitrateLookup = self::MPEGaudioBitrateArray(); |
|
1304 |
$MPEGaudioFrequencyLookup = self::MPEGaudioFrequencyArray(); |
|
1305 |
$MPEGaudioChannelModeLookup = self::MPEGaudioChannelModeArray(); |
|
1306 |
$MPEGaudioModeExtensionLookup = self::MPEGaudioModeExtensionArray(); |
|
1307 |
$MPEGaudioEmphasisLookup = self::MPEGaudioEmphasisArray(); |
|
1308 |
$LongMPEGversionLookup = array(); |
|
1309 |
$LongMPEGlayerLookup = array(); |
|
1310 |
$LongMPEGbitrateLookup = array(); |
|
1311 |
$LongMPEGpaddingLookup = array(); |
|
1312 |
$LongMPEGfrequencyLookup = array(); |
|
| 19 | 1313 |
$Distribution = array(); |
| 0 | 1314 |
$Distribution['bitrate'] = array(); |
1315 |
$Distribution['frequency'] = array(); |
|
1316 |
$Distribution['layer'] = array(); |
|
1317 |
$Distribution['version'] = array(); |
|
1318 |
$Distribution['padding'] = array(); |
|
1319 |
||
1320 |
$info = &$this->getid3->info; |
|
| 5 | 1321 |
$this->fseek($info['avdataoffset']); |
| 0 | 1322 |
|
1323 |
$max_frames_scan = 5000; |
|
1324 |
$frames_scanned = 0; |
|
1325 |
||
1326 |
$previousvalidframe = $info['avdataoffset']; |
|
| 5 | 1327 |
while ($this->ftell() < $info['avdataend']) {
|
| 0 | 1328 |
set_time_limit(30); |
| 5 | 1329 |
$head4 = $this->fread(4); |
| 0 | 1330 |
if (strlen($head4) < 4) {
|
1331 |
break; |
|
1332 |
} |
|
| 16 | 1333 |
if ($head4[0] != "\xFF") {
|
| 0 | 1334 |
for ($i = 1; $i < 4; $i++) {
|
| 16 | 1335 |
if ($head4[$i] == "\xFF") {
|
| 5 | 1336 |
$this->fseek($i - 4, SEEK_CUR); |
| 0 | 1337 |
continue 2; |
1338 |
} |
|
1339 |
} |
|
1340 |
continue; |
|
1341 |
} |
|
1342 |
if (!isset($MPEGaudioHeaderDecodeCache[$head4])) {
|
|
1343 |
$MPEGaudioHeaderDecodeCache[$head4] = self::MPEGaudioHeaderDecode($head4); |
|
1344 |
} |
|
1345 |
if (!isset($MPEGaudioHeaderValidCache[$head4])) {
|
|
1346 |
$MPEGaudioHeaderValidCache[$head4] = self::MPEGaudioHeaderValid($MPEGaudioHeaderDecodeCache[$head4], false, false); |
|
1347 |
} |
|
1348 |
if ($MPEGaudioHeaderValidCache[$head4]) {
|
|
1349 |
||
1350 |
if (!isset($MPEGaudioHeaderLengthCache[$head4])) {
|
|
1351 |
$LongMPEGversionLookup[$head4] = $MPEGaudioVersionLookup[$MPEGaudioHeaderDecodeCache[$head4]['version']]; |
|
1352 |
$LongMPEGlayerLookup[$head4] = $MPEGaudioLayerLookup[$MPEGaudioHeaderDecodeCache[$head4]['layer']]; |
|
1353 |
$LongMPEGbitrateLookup[$head4] = $MPEGaudioBitrateLookup[$LongMPEGversionLookup[$head4]][$LongMPEGlayerLookup[$head4]][$MPEGaudioHeaderDecodeCache[$head4]['bitrate']]; |
|
1354 |
$LongMPEGpaddingLookup[$head4] = (bool) $MPEGaudioHeaderDecodeCache[$head4]['padding']; |
|
1355 |
$LongMPEGfrequencyLookup[$head4] = $MPEGaudioFrequencyLookup[$LongMPEGversionLookup[$head4]][$MPEGaudioHeaderDecodeCache[$head4]['sample_rate']]; |
|
1356 |
$MPEGaudioHeaderLengthCache[$head4] = self::MPEGaudioFrameLength( |
|
1357 |
$LongMPEGbitrateLookup[$head4], |
|
1358 |
$LongMPEGversionLookup[$head4], |
|
1359 |
$LongMPEGlayerLookup[$head4], |
|
1360 |
$LongMPEGpaddingLookup[$head4], |
|
1361 |
$LongMPEGfrequencyLookup[$head4]); |
|
1362 |
} |
|
1363 |
if ($MPEGaudioHeaderLengthCache[$head4] > 4) {
|
|
| 5 | 1364 |
$WhereWeWere = $this->ftell(); |
1365 |
$this->fseek($MPEGaudioHeaderLengthCache[$head4] - 4, SEEK_CUR); |
|
1366 |
$next4 = $this->fread(4); |
|
| 16 | 1367 |
if ($next4[0] == "\xFF") {
|
| 0 | 1368 |
if (!isset($MPEGaudioHeaderDecodeCache[$next4])) {
|
1369 |
$MPEGaudioHeaderDecodeCache[$next4] = self::MPEGaudioHeaderDecode($next4); |
|
1370 |
} |
|
1371 |
if (!isset($MPEGaudioHeaderValidCache[$next4])) {
|
|
1372 |
$MPEGaudioHeaderValidCache[$next4] = self::MPEGaudioHeaderValid($MPEGaudioHeaderDecodeCache[$next4], false, false); |
|
1373 |
} |
|
1374 |
if ($MPEGaudioHeaderValidCache[$next4]) {
|
|
| 5 | 1375 |
$this->fseek(-4, SEEK_CUR); |
| 0 | 1376 |
|
| 16 | 1377 |
$Distribution['bitrate'][$LongMPEGbitrateLookup[$head4]] = isset($Distribution['bitrate'][$LongMPEGbitrateLookup[$head4]]) ? ++$Distribution['bitrate'][$LongMPEGbitrateLookup[$head4]] : 1; |
1378 |
$Distribution['layer'][$LongMPEGlayerLookup[$head4]] = isset($Distribution['layer'][$LongMPEGlayerLookup[$head4]]) ? ++$Distribution['layer'][$LongMPEGlayerLookup[$head4]] : 1; |
|
1379 |
$Distribution['version'][$LongMPEGversionLookup[$head4]] = isset($Distribution['version'][$LongMPEGversionLookup[$head4]]) ? ++$Distribution['version'][$LongMPEGversionLookup[$head4]] : 1; |
|
1380 |
$Distribution['padding'][intval($LongMPEGpaddingLookup[$head4])] = isset($Distribution['padding'][intval($LongMPEGpaddingLookup[$head4])]) ? ++$Distribution['padding'][intval($LongMPEGpaddingLookup[$head4])] : 1; |
|
1381 |
$Distribution['frequency'][$LongMPEGfrequencyLookup[$head4]] = isset($Distribution['frequency'][$LongMPEGfrequencyLookup[$head4]]) ? ++$Distribution['frequency'][$LongMPEGfrequencyLookup[$head4]] : 1; |
|
1382 |
if (++$frames_scanned >= $max_frames_scan) {
|
|
|
21
48c4eec2b7e6
Add CLAUDE.md documentation and sync WordPress core files
ymh <ymh.work@gmail.com>
parents:
19
diff
changeset
|
1383 |
$pct_data_scanned = getid3_lib::SafeDiv($this->ftell() - $info['avdataoffset'], $info['avdataend'] - $info['avdataoffset']); |
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
1384 |
$this->warning('too many MPEG audio frames to scan, only scanned first '.$max_frames_scan.' frames ('.number_format($pct_data_scanned * 100, 1).'% of file) and extrapolated distribution, playtime and bitrate may be incorrect.');
|
| 0 | 1385 |
foreach ($Distribution as $key1 => $value1) {
|
1386 |
foreach ($value1 as $key2 => $value2) {
|
|
|
21
48c4eec2b7e6
Add CLAUDE.md documentation and sync WordPress core files
ymh <ymh.work@gmail.com>
parents:
19
diff
changeset
|
1387 |
$Distribution[$key1][$key2] = $pct_data_scanned ? round($value2 / $pct_data_scanned) : 1; |
| 0 | 1388 |
} |
1389 |
} |
|
1390 |
break; |
|
1391 |
} |
|
1392 |
continue; |
|
1393 |
} |
|
1394 |
} |
|
1395 |
unset($next4); |
|
| 5 | 1396 |
$this->fseek($WhereWeWere - 3); |
| 0 | 1397 |
} |
1398 |
||
1399 |
} |
|
1400 |
} |
|
1401 |
foreach ($Distribution as $key => $value) {
|
|
1402 |
ksort($Distribution[$key], SORT_NUMERIC); |
|
1403 |
} |
|
1404 |
ksort($Distribution['version'], SORT_STRING); |
|
1405 |
$info['mpeg']['audio']['bitrate_distribution'] = $Distribution['bitrate']; |
|
1406 |
$info['mpeg']['audio']['frequency_distribution'] = $Distribution['frequency']; |
|
1407 |
$info['mpeg']['audio']['layer_distribution'] = $Distribution['layer']; |
|
1408 |
$info['mpeg']['audio']['version_distribution'] = $Distribution['version']; |
|
1409 |
$info['mpeg']['audio']['padding_distribution'] = $Distribution['padding']; |
|
1410 |
if (count($Distribution['version']) > 1) {
|
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
1411 |
$this->error('Corrupt file - more than one MPEG version detected');
|
| 0 | 1412 |
} |
1413 |
if (count($Distribution['layer']) > 1) {
|
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
1414 |
$this->error('Corrupt file - more than one MPEG layer detected');
|
| 0 | 1415 |
} |
1416 |
if (count($Distribution['frequency']) > 1) {
|
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
1417 |
$this->error('Corrupt file - more than one MPEG sample rate detected');
|
| 0 | 1418 |
} |
1419 |
||
1420 |
||
1421 |
$bittotal = 0; |
|
1422 |
foreach ($Distribution['bitrate'] as $bitratevalue => $bitratecount) {
|
|
1423 |
if ($bitratevalue != 'free') {
|
|
1424 |
$bittotal += ($bitratevalue * $bitratecount); |
|
1425 |
} |
|
1426 |
} |
|
1427 |
$info['mpeg']['audio']['frame_count'] = array_sum($Distribution['bitrate']); |
|
1428 |
if ($info['mpeg']['audio']['frame_count'] == 0) {
|
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
1429 |
$this->error('no MPEG audio frames found');
|
| 0 | 1430 |
return false; |
1431 |
} |
|
1432 |
$info['mpeg']['audio']['bitrate'] = ($bittotal / $info['mpeg']['audio']['frame_count']); |
|
1433 |
$info['mpeg']['audio']['bitrate_mode'] = ((count($Distribution['bitrate']) > 0) ? 'vbr' : 'cbr'); |
|
1434 |
$info['mpeg']['audio']['sample_rate'] = getid3_lib::array_max($Distribution['frequency'], true); |
|
1435 |
||
1436 |
$info['audio']['bitrate'] = $info['mpeg']['audio']['bitrate']; |
|
1437 |
$info['audio']['bitrate_mode'] = $info['mpeg']['audio']['bitrate_mode']; |
|
1438 |
$info['audio']['sample_rate'] = $info['mpeg']['audio']['sample_rate']; |
|
1439 |
$info['audio']['dataformat'] = 'mp'.getid3_lib::array_max($Distribution['layer'], true); |
|
1440 |
$info['fileformat'] = $info['audio']['dataformat']; |
|
1441 |
||
1442 |
return true; |
|
1443 |
} |
|
1444 |
||
| 16 | 1445 |
/** |
1446 |
* @param int $avdataoffset |
|
1447 |
* @param bool $BitrateHistogram |
|
1448 |
* |
|
1449 |
* @return bool |
|
1450 |
*/ |
|
| 0 | 1451 |
public function getOnlyMPEGaudioInfo($avdataoffset, $BitrateHistogram=false) {
|
1452 |
// looks for synch, decodes MPEG audio header |
|
1453 |
||
1454 |
$info = &$this->getid3->info; |
|
1455 |
||
1456 |
static $MPEGaudioVersionLookup; |
|
1457 |
static $MPEGaudioLayerLookup; |
|
1458 |
static $MPEGaudioBitrateLookup; |
|
1459 |
if (empty($MPEGaudioVersionLookup)) {
|
|
| 16 | 1460 |
$MPEGaudioVersionLookup = self::MPEGaudioVersionArray(); |
1461 |
$MPEGaudioLayerLookup = self::MPEGaudioLayerArray(); |
|
1462 |
$MPEGaudioBitrateLookup = self::MPEGaudioBitrateArray(); |
|
| 0 | 1463 |
} |
1464 |
||
| 5 | 1465 |
$this->fseek($avdataoffset); |
| 0 | 1466 |
$sync_seek_buffer_size = min(128 * 1024, $info['avdataend'] - $avdataoffset); |
1467 |
if ($sync_seek_buffer_size <= 0) {
|
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
1468 |
$this->error('Invalid $sync_seek_buffer_size at offset '.$avdataoffset);
|
| 0 | 1469 |
return false; |
1470 |
} |
|
| 5 | 1471 |
$header = $this->fread($sync_seek_buffer_size); |
| 0 | 1472 |
$sync_seek_buffer_size = strlen($header); |
1473 |
$SynchSeekOffset = 0; |
|
| 19 | 1474 |
$SyncSeekAttempts = 0; |
1475 |
$SyncSeekAttemptsMax = 1000; |
|
1476 |
$FirstFrameThisfileInfo = null; |
|
| 0 | 1477 |
while ($SynchSeekOffset < $sync_seek_buffer_size) {
|
|
21
48c4eec2b7e6
Add CLAUDE.md documentation and sync WordPress core files
ymh <ymh.work@gmail.com>
parents:
19
diff
changeset
|
1478 |
if ((($avdataoffset + $SynchSeekOffset) < $info['avdataend']) && !$this->feof()) {
|
| 0 | 1479 |
|
1480 |
if ($SynchSeekOffset > $sync_seek_buffer_size) {
|
|
1481 |
// if a synch's not found within the first 128k bytes, then give up |
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
1482 |
$this->error('Could not find valid MPEG audio synch within the first '.round($sync_seek_buffer_size / 1024).'kB');
|
| 0 | 1483 |
if (isset($info['audio']['bitrate'])) {
|
1484 |
unset($info['audio']['bitrate']); |
|
1485 |
} |
|
1486 |
if (isset($info['mpeg']['audio'])) {
|
|
1487 |
unset($info['mpeg']['audio']); |
|
1488 |
} |
|
1489 |
if (empty($info['mpeg'])) {
|
|
1490 |
unset($info['mpeg']); |
|
1491 |
} |
|
1492 |
return false; |
|
1493 |
} |
|
1494 |
} |
|
1495 |
||
1496 |
if (($SynchSeekOffset + 1) >= strlen($header)) {
|
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
1497 |
$this->error('Could not find valid MPEG synch before end of file');
|
| 0 | 1498 |
return false; |
1499 |
} |
|
1500 |
||
| 19 | 1501 |
if (($header[$SynchSeekOffset] == "\xFF") && ($header[($SynchSeekOffset + 1)] > "\xE0")) { // possible synch detected
|
1502 |
if (++$SyncSeekAttempts >= $SyncSeekAttemptsMax) {
|
|
1503 |
// https://github.com/JamesHeinrich/getID3/issues/286 |
|
1504 |
// corrupt files claiming to be MP3, with a large number of 0xFF bytes near the beginning, can cause this loop to take a very long time |
|
1505 |
// should have escape condition to avoid spending too much time scanning a corrupt file |
|
1506 |
// if a synch's not found within the first 128k bytes, then give up |
|
1507 |
$this->error('Could not find valid MPEG audio synch after scanning '.$SyncSeekAttempts.' candidate offsets');
|
|
1508 |
if (isset($info['audio']['bitrate'])) {
|
|
1509 |
unset($info['audio']['bitrate']); |
|
1510 |
} |
|
1511 |
if (isset($info['mpeg']['audio'])) {
|
|
1512 |
unset($info['mpeg']['audio']); |
|
1513 |
} |
|
1514 |
if (empty($info['mpeg'])) {
|
|
1515 |
unset($info['mpeg']); |
|
1516 |
} |
|
1517 |
return false; |
|
1518 |
} |
|
| 16 | 1519 |
$FirstFrameAVDataOffset = null; |
| 0 | 1520 |
if (!isset($FirstFrameThisfileInfo) && !isset($info['mpeg']['audio'])) {
|
1521 |
$FirstFrameThisfileInfo = $info; |
|
1522 |
$FirstFrameAVDataOffset = $avdataoffset + $SynchSeekOffset; |
|
1523 |
if (!$this->decodeMPEGaudioHeader($FirstFrameAVDataOffset, $FirstFrameThisfileInfo, false)) {
|
|
1524 |
// if this is the first valid MPEG-audio frame, save it in case it's a VBR header frame and there's |
|
1525 |
// garbage between this frame and a valid sequence of MPEG-audio frames, to be restored below |
|
1526 |
unset($FirstFrameThisfileInfo); |
|
1527 |
} |
|
1528 |
} |
|
1529 |
||
1530 |
$dummy = $info; // only overwrite real data if valid header found |
|
1531 |
if ($this->decodeMPEGaudioHeader($avdataoffset + $SynchSeekOffset, $dummy, true)) {
|
|
1532 |
$info = $dummy; |
|
1533 |
$info['avdataoffset'] = $avdataoffset + $SynchSeekOffset; |
|
1534 |
switch (isset($info['fileformat']) ? $info['fileformat'] : '') {
|
|
1535 |
case '': |
|
1536 |
case 'id3': |
|
1537 |
case 'ape': |
|
1538 |
case 'mp3': |
|
1539 |
$info['fileformat'] = 'mp3'; |
|
1540 |
$info['audio']['dataformat'] = 'mp3'; |
|
1541 |
break; |
|
1542 |
} |
|
| 16 | 1543 |
if (isset($FirstFrameThisfileInfo) && isset($FirstFrameThisfileInfo['mpeg']['audio']['bitrate_mode']) && ($FirstFrameThisfileInfo['mpeg']['audio']['bitrate_mode'] == 'vbr')) {
|
| 0 | 1544 |
if (!(abs($info['audio']['bitrate'] - $FirstFrameThisfileInfo['audio']['bitrate']) <= 1)) {
|
1545 |
// If there is garbage data between a valid VBR header frame and a sequence |
|
1546 |
// of valid MPEG-audio frames the VBR data is no longer discarded. |
|
1547 |
$info = $FirstFrameThisfileInfo; |
|
1548 |
$info['avdataoffset'] = $FirstFrameAVDataOffset; |
|
1549 |
$info['fileformat'] = 'mp3'; |
|
1550 |
$info['audio']['dataformat'] = 'mp3'; |
|
1551 |
$dummy = $info; |
|
1552 |
unset($dummy['mpeg']['audio']); |
|
1553 |
$GarbageOffsetStart = $FirstFrameAVDataOffset + $FirstFrameThisfileInfo['mpeg']['audio']['framelength']; |
|
1554 |
$GarbageOffsetEnd = $avdataoffset + $SynchSeekOffset; |
|
1555 |
if ($this->decodeMPEGaudioHeader($GarbageOffsetEnd, $dummy, true, true)) {
|
|
1556 |
$info = $dummy; |
|
1557 |
$info['avdataoffset'] = $GarbageOffsetEnd; |
|
| 19 | 1558 |
$this->warning('apparently-valid VBR header not used because could not find '.$this->mp3_valid_check_frames.' consecutive MPEG-audio frames immediately after VBR header (garbage data for '.($GarbageOffsetEnd - $GarbageOffsetStart).' bytes between '.$GarbageOffsetStart.' and '.$GarbageOffsetEnd.'), but did find valid CBR stream starting at '.$GarbageOffsetEnd);
|
| 0 | 1559 |
} else {
|
| 19 | 1560 |
$this->warning('using data from VBR header even though could not find '.$this->mp3_valid_check_frames.' consecutive MPEG-audio frames immediately after VBR header (garbage data for '.($GarbageOffsetEnd - $GarbageOffsetStart).' bytes between '.$GarbageOffsetStart.' and '.$GarbageOffsetEnd.')');
|
| 0 | 1561 |
} |
1562 |
} |
|
1563 |
} |
|
1564 |
if (isset($info['mpeg']['audio']['bitrate_mode']) && ($info['mpeg']['audio']['bitrate_mode'] == 'vbr') && !isset($info['mpeg']['audio']['VBR_method'])) {
|
|
1565 |
// VBR file with no VBR header |
|
1566 |
$BitrateHistogram = true; |
|
1567 |
} |
|
1568 |
||
1569 |
if ($BitrateHistogram) {
|
|
1570 |
||
1571 |
$info['mpeg']['audio']['stereo_distribution'] = array('stereo'=>0, 'joint stereo'=>0, 'dual channel'=>0, 'mono'=>0);
|
|
1572 |
$info['mpeg']['audio']['version_distribution'] = array('1'=>0, '2'=>0, '2.5'=>0);
|
|
1573 |
||
1574 |
if ($info['mpeg']['audio']['version'] == '1') {
|
|
1575 |
if ($info['mpeg']['audio']['layer'] == 3) {
|
|
1576 |
$info['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 32000=>0, 40000=>0, 48000=>0, 56000=>0, 64000=>0, 80000=>0, 96000=>0, 112000=>0, 128000=>0, 160000=>0, 192000=>0, 224000=>0, 256000=>0, 320000=>0);
|
|
1577 |
} elseif ($info['mpeg']['audio']['layer'] == 2) {
|
|
1578 |
$info['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 32000=>0, 48000=>0, 56000=>0, 64000=>0, 80000=>0, 96000=>0, 112000=>0, 128000=>0, 160000=>0, 192000=>0, 224000=>0, 256000=>0, 320000=>0, 384000=>0);
|
|
1579 |
} elseif ($info['mpeg']['audio']['layer'] == 1) {
|
|
1580 |
$info['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 32000=>0, 64000=>0, 96000=>0, 128000=>0, 160000=>0, 192000=>0, 224000=>0, 256000=>0, 288000=>0, 320000=>0, 352000=>0, 384000=>0, 416000=>0, 448000=>0);
|
|
1581 |
} |
|
1582 |
} elseif ($info['mpeg']['audio']['layer'] == 1) {
|
|
1583 |
$info['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 32000=>0, 48000=>0, 56000=>0, 64000=>0, 80000=>0, 96000=>0, 112000=>0, 128000=>0, 144000=>0, 160000=>0, 176000=>0, 192000=>0, 224000=>0, 256000=>0);
|
|
1584 |
} else {
|
|
1585 |
$info['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 8000=>0, 16000=>0, 24000=>0, 32000=>0, 40000=>0, 48000=>0, 56000=>0, 64000=>0, 80000=>0, 96000=>0, 112000=>0, 128000=>0, 144000=>0, 160000=>0);
|
|
1586 |
} |
|
1587 |
||
1588 |
$dummy = array('error'=>$info['error'], 'warning'=>$info['warning'], 'avdataend'=>$info['avdataend'], 'avdataoffset'=>$info['avdataoffset']);
|
|
1589 |
$synchstartoffset = $info['avdataoffset']; |
|
| 5 | 1590 |
$this->fseek($info['avdataoffset']); |
| 0 | 1591 |
|
1592 |
// you can play with these numbers: |
|
1593 |
$max_frames_scan = 50000; |
|
1594 |
$max_scan_segments = 10; |
|
1595 |
||
1596 |
// don't play with these numbers: |
|
1597 |
$FastMode = false; |
|
1598 |
$SynchErrorsFound = 0; |
|
1599 |
$frames_scanned = 0; |
|
1600 |
$this_scan_segment = 0; |
|
1601 |
$frames_scan_per_segment = ceil($max_frames_scan / $max_scan_segments); |
|
1602 |
$pct_data_scanned = 0; |
|
1603 |
for ($current_segment = 0; $current_segment < $max_scan_segments; $current_segment++) {
|
|
1604 |
$frames_scanned_this_segment = 0; |
|
| 19 | 1605 |
$scan_start_offset = array(); |
| 5 | 1606 |
if ($this->ftell() >= $info['avdataend']) {
|
| 0 | 1607 |
break; |
1608 |
} |
|
| 5 | 1609 |
$scan_start_offset[$current_segment] = max($this->ftell(), $info['avdataoffset'] + round($current_segment * (($info['avdataend'] - $info['avdataoffset']) / $max_scan_segments))); |
| 0 | 1610 |
if ($current_segment > 0) {
|
| 5 | 1611 |
$this->fseek($scan_start_offset[$current_segment]); |
1612 |
$buffer_4k = $this->fread(4096); |
|
| 0 | 1613 |
for ($j = 0; $j < (strlen($buffer_4k) - 4); $j++) {
|
| 16 | 1614 |
if (($buffer_4k[$j] == "\xFF") && ($buffer_4k[($j + 1)] > "\xE0")) { // synch detected
|
| 0 | 1615 |
if ($this->decodeMPEGaudioHeader($scan_start_offset[$current_segment] + $j, $dummy, false, false, $FastMode)) {
|
1616 |
$calculated_next_offset = $scan_start_offset[$current_segment] + $j + $dummy['mpeg']['audio']['framelength']; |
|
1617 |
if ($this->decodeMPEGaudioHeader($calculated_next_offset, $dummy, false, false, $FastMode)) {
|
|
1618 |
$scan_start_offset[$current_segment] += $j; |
|
1619 |
break; |
|
1620 |
} |
|
1621 |
} |
|
1622 |
} |
|
1623 |
} |
|
1624 |
} |
|
1625 |
$synchstartoffset = $scan_start_offset[$current_segment]; |
|
| 16 | 1626 |
while (($synchstartoffset < $info['avdataend']) && $this->decodeMPEGaudioHeader($synchstartoffset, $dummy, false, false, $FastMode)) {
|
| 0 | 1627 |
$FastMode = true; |
1628 |
$thisframebitrate = $MPEGaudioBitrateLookup[$MPEGaudioVersionLookup[$dummy['mpeg']['audio']['raw']['version']]][$MPEGaudioLayerLookup[$dummy['mpeg']['audio']['raw']['layer']]][$dummy['mpeg']['audio']['raw']['bitrate']]; |
|
1629 |
||
1630 |
if (empty($dummy['mpeg']['audio']['framelength'])) {
|
|
1631 |
$SynchErrorsFound++; |
|
1632 |
$synchstartoffset++; |
|
1633 |
} else {
|
|
1634 |
getid3_lib::safe_inc($info['mpeg']['audio']['bitrate_distribution'][$thisframebitrate]); |
|
1635 |
getid3_lib::safe_inc($info['mpeg']['audio']['stereo_distribution'][$dummy['mpeg']['audio']['channelmode']]); |
|
1636 |
getid3_lib::safe_inc($info['mpeg']['audio']['version_distribution'][$dummy['mpeg']['audio']['version']]); |
|
1637 |
$synchstartoffset += $dummy['mpeg']['audio']['framelength']; |
|
1638 |
} |
|
1639 |
$frames_scanned++; |
|
1640 |
if ($frames_scan_per_segment && (++$frames_scanned_this_segment >= $frames_scan_per_segment)) {
|
|
|
21
48c4eec2b7e6
Add CLAUDE.md documentation and sync WordPress core files
ymh <ymh.work@gmail.com>
parents:
19
diff
changeset
|
1641 |
$this_pct_scanned = getid3_lib::SafeDiv($this->ftell() - $scan_start_offset[$current_segment], $info['avdataend'] - $info['avdataoffset']); |
| 0 | 1642 |
if (($current_segment == 0) && (($this_pct_scanned * $max_scan_segments) >= 1)) {
|
1643 |
// file likely contains < $max_frames_scan, just scan as one segment |
|
1644 |
$max_scan_segments = 1; |
|
1645 |
$frames_scan_per_segment = $max_frames_scan; |
|
1646 |
} else {
|
|
1647 |
$pct_data_scanned += $this_pct_scanned; |
|
1648 |
break; |
|
1649 |
} |
|
1650 |
} |
|
1651 |
} |
|
1652 |
} |
|
1653 |
if ($pct_data_scanned > 0) {
|
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
1654 |
$this->warning('too many MPEG audio frames to scan, only scanned '.$frames_scanned.' frames in '.$max_scan_segments.' segments ('.number_format($pct_data_scanned * 100, 1).'% of file) and extrapolated distribution, playtime and bitrate may be incorrect.');
|
| 0 | 1655 |
foreach ($info['mpeg']['audio'] as $key1 => $value1) {
|
1656 |
if (!preg_match('#_distribution$#i', $key1)) {
|
|
1657 |
continue; |
|
1658 |
} |
|
1659 |
foreach ($value1 as $key2 => $value2) {
|
|
1660 |
$info['mpeg']['audio'][$key1][$key2] = round($value2 / $pct_data_scanned); |
|
1661 |
} |
|
1662 |
} |
|
1663 |
} |
|
1664 |
||
1665 |
if ($SynchErrorsFound > 0) {
|
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
1666 |
$this->warning('Found '.$SynchErrorsFound.' synch errors in histogram analysis');
|
| 0 | 1667 |
//return false; |
1668 |
} |
|
1669 |
||
1670 |
$bittotal = 0; |
|
1671 |
$framecounter = 0; |
|
1672 |
foreach ($info['mpeg']['audio']['bitrate_distribution'] as $bitratevalue => $bitratecount) {
|
|
1673 |
$framecounter += $bitratecount; |
|
1674 |
if ($bitratevalue != 'free') {
|
|
1675 |
$bittotal += ($bitratevalue * $bitratecount); |
|
1676 |
} |
|
1677 |
} |
|
1678 |
if ($framecounter == 0) {
|
|
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
1679 |
$this->error('Corrupt MP3 file: framecounter == zero');
|
| 0 | 1680 |
return false; |
1681 |
} |
|
1682 |
$info['mpeg']['audio']['frame_count'] = getid3_lib::CastAsInt($framecounter); |
|
1683 |
$info['mpeg']['audio']['bitrate'] = ($bittotal / $framecounter); |
|
1684 |
||
1685 |
$info['audio']['bitrate'] = $info['mpeg']['audio']['bitrate']; |
|
1686 |
||
1687 |
||
1688 |
// Definitively set VBR vs CBR, even if the Xing/LAME/VBRI header says differently |
|
1689 |
$distinct_bitrates = 0; |
|
1690 |
foreach ($info['mpeg']['audio']['bitrate_distribution'] as $bitrate_value => $bitrate_count) {
|
|
1691 |
if ($bitrate_count > 0) {
|
|
1692 |
$distinct_bitrates++; |
|
1693 |
} |
|
1694 |
} |
|
1695 |
if ($distinct_bitrates > 1) {
|
|
1696 |
$info['mpeg']['audio']['bitrate_mode'] = 'vbr'; |
|
1697 |
} else {
|
|
1698 |
$info['mpeg']['audio']['bitrate_mode'] = 'cbr'; |
|
1699 |
} |
|
1700 |
$info['audio']['bitrate_mode'] = $info['mpeg']['audio']['bitrate_mode']; |
|
1701 |
||
1702 |
} |
|
1703 |
||
1704 |
break; // exit while() |
|
1705 |
} |
|
1706 |
} |
|
1707 |
||
1708 |
$SynchSeekOffset++; |
|
1709 |
if (($avdataoffset + $SynchSeekOffset) >= $info['avdataend']) {
|
|
1710 |
// end of file/data |
|
1711 |
||
1712 |
if (empty($info['mpeg']['audio'])) {
|
|
1713 |
||
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
1714 |
$this->error('could not find valid MPEG synch before end of file');
|
| 0 | 1715 |
if (isset($info['audio']['bitrate'])) {
|
1716 |
unset($info['audio']['bitrate']); |
|
1717 |
} |
|
1718 |
if (isset($info['mpeg']['audio'])) {
|
|
1719 |
unset($info['mpeg']['audio']); |
|
1720 |
} |
|
1721 |
if (isset($info['mpeg']) && (!is_array($info['mpeg']) || empty($info['mpeg']))) {
|
|
1722 |
unset($info['mpeg']); |
|
1723 |
} |
|
1724 |
return false; |
|
1725 |
||
1726 |
} |
|
1727 |
break; |
|
1728 |
} |
|
1729 |
||
1730 |
} |
|
1731 |
$info['audio']['channels'] = $info['mpeg']['audio']['channels']; |
|
|
21
48c4eec2b7e6
Add CLAUDE.md documentation and sync WordPress core files
ymh <ymh.work@gmail.com>
parents:
19
diff
changeset
|
1732 |
if ($info['audio']['channels'] < 1) {
|
|
48c4eec2b7e6
Add CLAUDE.md documentation and sync WordPress core files
ymh <ymh.work@gmail.com>
parents:
19
diff
changeset
|
1733 |
$this->error('Corrupt MP3 file: no channels');
|
|
48c4eec2b7e6
Add CLAUDE.md documentation and sync WordPress core files
ymh <ymh.work@gmail.com>
parents:
19
diff
changeset
|
1734 |
return false; |
|
48c4eec2b7e6
Add CLAUDE.md documentation and sync WordPress core files
ymh <ymh.work@gmail.com>
parents:
19
diff
changeset
|
1735 |
} |
| 0 | 1736 |
$info['audio']['channelmode'] = $info['mpeg']['audio']['channelmode']; |
1737 |
$info['audio']['sample_rate'] = $info['mpeg']['audio']['sample_rate']; |
|
1738 |
return true; |
|
1739 |
} |
|
1740 |
||
| 16 | 1741 |
/** |
1742 |
* @return array |
|
1743 |
*/ |
|
| 0 | 1744 |
public static function MPEGaudioVersionArray() {
|
1745 |
static $MPEGaudioVersion = array('2.5', false, '2', '1');
|
|
1746 |
return $MPEGaudioVersion; |
|
1747 |
} |
|
1748 |
||
| 16 | 1749 |
/** |
1750 |
* @return array |
|
1751 |
*/ |
|
| 0 | 1752 |
public static function MPEGaudioLayerArray() {
|
1753 |
static $MPEGaudioLayer = array(false, 3, 2, 1); |
|
1754 |
return $MPEGaudioLayer; |
|
1755 |
} |
|
1756 |
||
| 16 | 1757 |
/** |
1758 |
* @return array |
|
1759 |
*/ |
|
| 0 | 1760 |
public static function MPEGaudioBitrateArray() {
|
1761 |
static $MPEGaudioBitrate; |
|
1762 |
if (empty($MPEGaudioBitrate)) {
|
|
1763 |
$MPEGaudioBitrate = array ( |
|
1764 |
'1' => array (1 => array('free', 32000, 64000, 96000, 128000, 160000, 192000, 224000, 256000, 288000, 320000, 352000, 384000, 416000, 448000),
|
|
1765 |
2 => array('free', 32000, 48000, 56000, 64000, 80000, 96000, 112000, 128000, 160000, 192000, 224000, 256000, 320000, 384000),
|
|
1766 |
3 => array('free', 32000, 40000, 48000, 56000, 64000, 80000, 96000, 112000, 128000, 160000, 192000, 224000, 256000, 320000)
|
|
1767 |
), |
|
1768 |
||
1769 |
'2' => array (1 => array('free', 32000, 48000, 56000, 64000, 80000, 96000, 112000, 128000, 144000, 160000, 176000, 192000, 224000, 256000),
|
|
1770 |
2 => array('free', 8000, 16000, 24000, 32000, 40000, 48000, 56000, 64000, 80000, 96000, 112000, 128000, 144000, 160000),
|
|
1771 |
) |
|
1772 |
); |
|
1773 |
$MPEGaudioBitrate['2'][3] = $MPEGaudioBitrate['2'][2]; |
|
1774 |
$MPEGaudioBitrate['2.5'] = $MPEGaudioBitrate['2']; |
|
1775 |
} |
|
1776 |
return $MPEGaudioBitrate; |
|
1777 |
} |
|
1778 |
||
| 16 | 1779 |
/** |
1780 |
* @return array |
|
1781 |
*/ |
|
| 0 | 1782 |
public static function MPEGaudioFrequencyArray() {
|
1783 |
static $MPEGaudioFrequency; |
|
1784 |
if (empty($MPEGaudioFrequency)) {
|
|
1785 |
$MPEGaudioFrequency = array ( |
|
1786 |
'1' => array(44100, 48000, 32000), |
|
1787 |
'2' => array(22050, 24000, 16000), |
|
1788 |
'2.5' => array(11025, 12000, 8000) |
|
1789 |
); |
|
1790 |
} |
|
1791 |
return $MPEGaudioFrequency; |
|
1792 |
} |
|
1793 |
||
| 16 | 1794 |
/** |
1795 |
* @return array |
|
1796 |
*/ |
|
| 0 | 1797 |
public static function MPEGaudioChannelModeArray() {
|
1798 |
static $MPEGaudioChannelMode = array('stereo', 'joint stereo', 'dual channel', 'mono');
|
|
1799 |
return $MPEGaudioChannelMode; |
|
1800 |
} |
|
1801 |
||
| 16 | 1802 |
/** |
1803 |
* @return array |
|
1804 |
*/ |
|
| 0 | 1805 |
public static function MPEGaudioModeExtensionArray() {
|
1806 |
static $MPEGaudioModeExtension; |
|
1807 |
if (empty($MPEGaudioModeExtension)) {
|
|
1808 |
$MPEGaudioModeExtension = array ( |
|
1809 |
1 => array('4-31', '8-31', '12-31', '16-31'),
|
|
1810 |
2 => array('4-31', '8-31', '12-31', '16-31'),
|
|
1811 |
3 => array('', 'IS', 'MS', 'IS+MS')
|
|
1812 |
); |
|
1813 |
} |
|
1814 |
return $MPEGaudioModeExtension; |
|
1815 |
} |
|
1816 |
||
| 16 | 1817 |
/** |
1818 |
* @return array |
|
1819 |
*/ |
|
| 0 | 1820 |
public static function MPEGaudioEmphasisArray() {
|
1821 |
static $MPEGaudioEmphasis = array('none', '50/15ms', false, 'CCIT J.17');
|
|
1822 |
return $MPEGaudioEmphasis; |
|
1823 |
} |
|
1824 |
||
| 16 | 1825 |
/** |
1826 |
* @param string $head4 |
|
1827 |
* @param bool $allowBitrate15 |
|
1828 |
* |
|
1829 |
* @return bool |
|
1830 |
*/ |
|
| 0 | 1831 |
public static function MPEGaudioHeaderBytesValid($head4, $allowBitrate15=false) {
|
1832 |
return self::MPEGaudioHeaderValid(self::MPEGaudioHeaderDecode($head4), false, $allowBitrate15); |
|
1833 |
} |
|
1834 |
||
| 16 | 1835 |
/** |
1836 |
* @param array $rawarray |
|
1837 |
* @param bool $echoerrors |
|
1838 |
* @param bool $allowBitrate15 |
|
1839 |
* |
|
1840 |
* @return bool |
|
1841 |
*/ |
|
| 0 | 1842 |
public static function MPEGaudioHeaderValid($rawarray, $echoerrors=false, $allowBitrate15=false) {
|
| 16 | 1843 |
if (!isset($rawarray['synch']) || ($rawarray['synch'] & 0x0FFE) != 0x0FFE) {
|
| 0 | 1844 |
return false; |
1845 |
} |
|
1846 |
||
1847 |
static $MPEGaudioVersionLookup; |
|
1848 |
static $MPEGaudioLayerLookup; |
|
1849 |
static $MPEGaudioBitrateLookup; |
|
1850 |
static $MPEGaudioFrequencyLookup; |
|
1851 |
static $MPEGaudioChannelModeLookup; |
|
1852 |
static $MPEGaudioModeExtensionLookup; |
|
1853 |
static $MPEGaudioEmphasisLookup; |
|
1854 |
if (empty($MPEGaudioVersionLookup)) {
|
|
1855 |
$MPEGaudioVersionLookup = self::MPEGaudioVersionArray(); |
|
1856 |
$MPEGaudioLayerLookup = self::MPEGaudioLayerArray(); |
|
1857 |
$MPEGaudioBitrateLookup = self::MPEGaudioBitrateArray(); |
|
1858 |
$MPEGaudioFrequencyLookup = self::MPEGaudioFrequencyArray(); |
|
1859 |
$MPEGaudioChannelModeLookup = self::MPEGaudioChannelModeArray(); |
|
1860 |
$MPEGaudioModeExtensionLookup = self::MPEGaudioModeExtensionArray(); |
|
1861 |
$MPEGaudioEmphasisLookup = self::MPEGaudioEmphasisArray(); |
|
1862 |
} |
|
1863 |
||
1864 |
if (isset($MPEGaudioVersionLookup[$rawarray['version']])) {
|
|
1865 |
$decodedVersion = $MPEGaudioVersionLookup[$rawarray['version']]; |
|
1866 |
} else {
|
|
1867 |
echo ($echoerrors ? "\n".'invalid Version ('.$rawarray['version'].')' : '');
|
|
1868 |
return false; |
|
1869 |
} |
|
1870 |
if (isset($MPEGaudioLayerLookup[$rawarray['layer']])) {
|
|
1871 |
$decodedLayer = $MPEGaudioLayerLookup[$rawarray['layer']]; |
|
1872 |
} else {
|
|
1873 |
echo ($echoerrors ? "\n".'invalid Layer ('.$rawarray['layer'].')' : '');
|
|
1874 |
return false; |
|
1875 |
} |
|
1876 |
if (!isset($MPEGaudioBitrateLookup[$decodedVersion][$decodedLayer][$rawarray['bitrate']])) {
|
|
1877 |
echo ($echoerrors ? "\n".'invalid Bitrate ('.$rawarray['bitrate'].')' : '');
|
|
1878 |
if ($rawarray['bitrate'] == 15) {
|
|
1879 |
// known issue in LAME 3.90 - 3.93.1 where free-format has bitrate ID of 15 instead of 0 |
|
1880 |
// let it go through here otherwise file will not be identified |
|
1881 |
if (!$allowBitrate15) {
|
|
1882 |
return false; |
|
1883 |
} |
|
1884 |
} else {
|
|
1885 |
return false; |
|
1886 |
} |
|
1887 |
} |
|
1888 |
if (!isset($MPEGaudioFrequencyLookup[$decodedVersion][$rawarray['sample_rate']])) {
|
|
1889 |
echo ($echoerrors ? "\n".'invalid Frequency ('.$rawarray['sample_rate'].')' : '');
|
|
1890 |
return false; |
|
1891 |
} |
|
1892 |
if (!isset($MPEGaudioChannelModeLookup[$rawarray['channelmode']])) {
|
|
1893 |
echo ($echoerrors ? "\n".'invalid ChannelMode ('.$rawarray['channelmode'].')' : '');
|
|
1894 |
return false; |
|
1895 |
} |
|
1896 |
if (!isset($MPEGaudioModeExtensionLookup[$decodedLayer][$rawarray['modeextension']])) {
|
|
1897 |
echo ($echoerrors ? "\n".'invalid Mode Extension ('.$rawarray['modeextension'].')' : '');
|
|
1898 |
return false; |
|
1899 |
} |
|
1900 |
if (!isset($MPEGaudioEmphasisLookup[$rawarray['emphasis']])) {
|
|
1901 |
echo ($echoerrors ? "\n".'invalid Emphasis ('.$rawarray['emphasis'].')' : '');
|
|
1902 |
return false; |
|
1903 |
} |
|
1904 |
// These are just either set or not set, you can't mess that up :) |
|
1905 |
// $rawarray['protection']; |
|
1906 |
// $rawarray['padding']; |
|
1907 |
// $rawarray['private']; |
|
1908 |
// $rawarray['copyright']; |
|
1909 |
// $rawarray['original']; |
|
1910 |
||
1911 |
return true; |
|
1912 |
} |
|
1913 |
||
| 16 | 1914 |
/** |
1915 |
* @param string $Header4Bytes |
|
1916 |
* |
|
1917 |
* @return array|false |
|
1918 |
*/ |
|
| 0 | 1919 |
public static function MPEGaudioHeaderDecode($Header4Bytes) {
|
1920 |
// AAAA AAAA AAAB BCCD EEEE FFGH IIJJ KLMM |
|
1921 |
// A - Frame sync (all bits set) |
|
1922 |
// B - MPEG Audio version ID |
|
1923 |
// C - Layer description |
|
1924 |
// D - Protection bit |
|
1925 |
// E - Bitrate index |
|
1926 |
// F - Sampling rate frequency index |
|
1927 |
// G - Padding bit |
|
1928 |
// H - Private bit |
|
1929 |
// I - Channel Mode |
|
1930 |
// J - Mode extension (Only if Joint stereo) |
|
1931 |
// K - Copyright |
|
1932 |
// L - Original |
|
1933 |
// M - Emphasis |
|
1934 |
||
1935 |
if (strlen($Header4Bytes) != 4) {
|
|
1936 |
return false; |
|
1937 |
} |
|
1938 |
||
| 19 | 1939 |
$MPEGrawHeader = array(); |
| 0 | 1940 |
$MPEGrawHeader['synch'] = (getid3_lib::BigEndian2Int(substr($Header4Bytes, 0, 2)) & 0xFFE0) >> 4; |
| 16 | 1941 |
$MPEGrawHeader['version'] = (ord($Header4Bytes[1]) & 0x18) >> 3; // BB |
1942 |
$MPEGrawHeader['layer'] = (ord($Header4Bytes[1]) & 0x06) >> 1; // CC |
|
1943 |
$MPEGrawHeader['protection'] = (ord($Header4Bytes[1]) & 0x01); // D |
|
1944 |
$MPEGrawHeader['bitrate'] = (ord($Header4Bytes[2]) & 0xF0) >> 4; // EEEE |
|
1945 |
$MPEGrawHeader['sample_rate'] = (ord($Header4Bytes[2]) & 0x0C) >> 2; // FF |
|
1946 |
$MPEGrawHeader['padding'] = (ord($Header4Bytes[2]) & 0x02) >> 1; // G |
|
1947 |
$MPEGrawHeader['private'] = (ord($Header4Bytes[2]) & 0x01); // H |
|
1948 |
$MPEGrawHeader['channelmode'] = (ord($Header4Bytes[3]) & 0xC0) >> 6; // II |
|
1949 |
$MPEGrawHeader['modeextension'] = (ord($Header4Bytes[3]) & 0x30) >> 4; // JJ |
|
1950 |
$MPEGrawHeader['copyright'] = (ord($Header4Bytes[3]) & 0x08) >> 3; // K |
|
1951 |
$MPEGrawHeader['original'] = (ord($Header4Bytes[3]) & 0x04) >> 2; // L |
|
1952 |
$MPEGrawHeader['emphasis'] = (ord($Header4Bytes[3]) & 0x03); // MM |
|
| 0 | 1953 |
|
1954 |
return $MPEGrawHeader; |
|
1955 |
} |
|
1956 |
||
| 16 | 1957 |
/** |
1958 |
* @param int|string $bitrate |
|
1959 |
* @param string $version |
|
1960 |
* @param string $layer |
|
1961 |
* @param bool $padding |
|
1962 |
* @param int $samplerate |
|
1963 |
* |
|
1964 |
* @return int|false |
|
1965 |
*/ |
|
| 0 | 1966 |
public static function MPEGaudioFrameLength(&$bitrate, &$version, &$layer, $padding, &$samplerate) {
|
1967 |
static $AudioFrameLengthCache = array(); |
|
1968 |
||
1969 |
if (!isset($AudioFrameLengthCache[$bitrate][$version][$layer][$padding][$samplerate])) {
|
|
1970 |
$AudioFrameLengthCache[$bitrate][$version][$layer][$padding][$samplerate] = false; |
|
1971 |
if ($bitrate != 'free') {
|
|
1972 |
||
1973 |
if ($version == '1') {
|
|
1974 |
||
1975 |
if ($layer == '1') {
|
|
1976 |
||
1977 |
// For Layer I slot is 32 bits long |
|
1978 |
$FrameLengthCoefficient = 48; |
|
1979 |
$SlotLength = 4; |
|
1980 |
||
1981 |
} else { // Layer 2 / 3
|
|
1982 |
||
1983 |
// for Layer 2 and Layer 3 slot is 8 bits long. |
|
1984 |
$FrameLengthCoefficient = 144; |
|
1985 |
$SlotLength = 1; |
|
1986 |
||
1987 |
} |
|
1988 |
||
1989 |
} else { // MPEG-2 / MPEG-2.5
|
|
1990 |
||
1991 |
if ($layer == '1') {
|
|
1992 |
||
1993 |
// For Layer I slot is 32 bits long |
|
1994 |
$FrameLengthCoefficient = 24; |
|
1995 |
$SlotLength = 4; |
|
1996 |
||
1997 |
} elseif ($layer == '2') {
|
|
1998 |
||
1999 |
// for Layer 2 and Layer 3 slot is 8 bits long. |
|
2000 |
$FrameLengthCoefficient = 144; |
|
2001 |
$SlotLength = 1; |
|
2002 |
||
2003 |
} else { // layer 3
|
|
2004 |
||
2005 |
// for Layer 2 and Layer 3 slot is 8 bits long. |
|
2006 |
$FrameLengthCoefficient = 72; |
|
2007 |
$SlotLength = 1; |
|
2008 |
||
2009 |
} |
|
2010 |
||
2011 |
} |
|
2012 |
||
2013 |
// FrameLengthInBytes = ((Coefficient * BitRate) / SampleRate) + Padding |
|
2014 |
if ($samplerate > 0) {
|
|
2015 |
$NewFramelength = ($FrameLengthCoefficient * $bitrate) / $samplerate; |
|
2016 |
$NewFramelength = floor($NewFramelength / $SlotLength) * $SlotLength; // round to next-lower multiple of SlotLength (1 byte for Layer 2/3, 4 bytes for Layer I) |
|
2017 |
if ($padding) {
|
|
2018 |
$NewFramelength += $SlotLength; |
|
2019 |
} |
|
2020 |
$AudioFrameLengthCache[$bitrate][$version][$layer][$padding][$samplerate] = (int) $NewFramelength; |
|
2021 |
} |
|
2022 |
} |
|
2023 |
} |
|
2024 |
return $AudioFrameLengthCache[$bitrate][$version][$layer][$padding][$samplerate]; |
|
2025 |
} |
|
2026 |
||
| 16 | 2027 |
/** |
2028 |
* @param float|int $bit_rate |
|
2029 |
* |
|
2030 |
* @return int|float|string |
|
2031 |
*/ |
|
| 0 | 2032 |
public static function ClosestStandardMP3Bitrate($bit_rate) {
|
2033 |
static $standard_bit_rates = array (320000, 256000, 224000, 192000, 160000, 128000, 112000, 96000, 80000, 64000, 56000, 48000, 40000, 32000, 24000, 16000, 8000); |
|
2034 |
static $bit_rate_table = array (0=>'-'); |
|
2035 |
$round_bit_rate = intval(round($bit_rate, -3)); |
|
2036 |
if (!isset($bit_rate_table[$round_bit_rate])) {
|
|
2037 |
if ($round_bit_rate > max($standard_bit_rates)) {
|
|
2038 |
$bit_rate_table[$round_bit_rate] = round($bit_rate, 2 - strlen($bit_rate)); |
|
2039 |
} else {
|
|
2040 |
$bit_rate_table[$round_bit_rate] = max($standard_bit_rates); |
|
2041 |
foreach ($standard_bit_rates as $standard_bit_rate) {
|
|
2042 |
if ($round_bit_rate >= $standard_bit_rate + (($bit_rate_table[$round_bit_rate] - $standard_bit_rate) / 2)) {
|
|
2043 |
break; |
|
2044 |
} |
|
2045 |
$bit_rate_table[$round_bit_rate] = $standard_bit_rate; |
|
2046 |
} |
|
2047 |
} |
|
2048 |
} |
|
2049 |
return $bit_rate_table[$round_bit_rate]; |
|
2050 |
} |
|
2051 |
||
| 16 | 2052 |
/** |
2053 |
* @param string $version |
|
2054 |
* @param string $channelmode |
|
2055 |
* |
|
2056 |
* @return int |
|
2057 |
*/ |
|
| 0 | 2058 |
public static function XingVBRidOffset($version, $channelmode) {
|
2059 |
static $XingVBRidOffsetCache = array(); |
|
| 16 | 2060 |
if (empty($XingVBRidOffsetCache)) {
|
2061 |
$XingVBRidOffsetCache = array ( |
|
| 0 | 2062 |
'1' => array ('mono' => 0x15, // 4 + 17 = 21
|
2063 |
'stereo' => 0x24, // 4 + 32 = 36 |
|
2064 |
'joint stereo' => 0x24, |
|
2065 |
'dual channel' => 0x24 |
|
2066 |
), |
|
2067 |
||
2068 |
'2' => array ('mono' => 0x0D, // 4 + 9 = 13
|
|
2069 |
'stereo' => 0x15, // 4 + 17 = 21 |
|
2070 |
'joint stereo' => 0x15, |
|
2071 |
'dual channel' => 0x15 |
|
2072 |
), |
|
2073 |
||
2074 |
'2.5' => array ('mono' => 0x15,
|
|
2075 |
'stereo' => 0x15, |
|
2076 |
'joint stereo' => 0x15, |
|
2077 |
'dual channel' => 0x15 |
|
2078 |
) |
|
2079 |
); |
|
2080 |
} |
|
| 16 | 2081 |
return $XingVBRidOffsetCache[$version][$channelmode]; |
| 0 | 2082 |
} |
2083 |
||
| 16 | 2084 |
/** |
2085 |
* @param int $VBRmethodID |
|
2086 |
* |
|
2087 |
* @return string |
|
2088 |
*/ |
|
| 0 | 2089 |
public static function LAMEvbrMethodLookup($VBRmethodID) {
|
2090 |
static $LAMEvbrMethodLookup = array( |
|
2091 |
0x00 => 'unknown', |
|
2092 |
0x01 => 'cbr', |
|
2093 |
0x02 => 'abr', |
|
2094 |
0x03 => 'vbr-old / vbr-rh', |
|
2095 |
0x04 => 'vbr-new / vbr-mtrh', |
|
2096 |
0x05 => 'vbr-mt', |
|
2097 |
0x06 => 'vbr (full vbr method 4)', |
|
2098 |
0x08 => 'cbr (constant bitrate 2 pass)', |
|
2099 |
0x09 => 'abr (2 pass)', |
|
2100 |
0x0F => 'reserved' |
|
2101 |
); |
|
2102 |
return (isset($LAMEvbrMethodLookup[$VBRmethodID]) ? $LAMEvbrMethodLookup[$VBRmethodID] : ''); |
|
2103 |
} |
|
2104 |
||
| 16 | 2105 |
/** |
2106 |
* @param int $StereoModeID |
|
2107 |
* |
|
2108 |
* @return string |
|
2109 |
*/ |
|
| 0 | 2110 |
public static function LAMEmiscStereoModeLookup($StereoModeID) {
|
2111 |
static $LAMEmiscStereoModeLookup = array( |
|
2112 |
0 => 'mono', |
|
2113 |
1 => 'stereo', |
|
2114 |
2 => 'dual mono', |
|
2115 |
3 => 'joint stereo', |
|
2116 |
4 => 'forced stereo', |
|
2117 |
5 => 'auto', |
|
2118 |
6 => 'intensity stereo', |
|
2119 |
7 => 'other' |
|
2120 |
); |
|
2121 |
return (isset($LAMEmiscStereoModeLookup[$StereoModeID]) ? $LAMEmiscStereoModeLookup[$StereoModeID] : ''); |
|
2122 |
} |
|
2123 |
||
| 16 | 2124 |
/** |
2125 |
* @param int $SourceSampleFrequencyID |
|
2126 |
* |
|
2127 |
* @return string |
|
2128 |
*/ |
|
| 0 | 2129 |
public static function LAMEmiscSourceSampleFrequencyLookup($SourceSampleFrequencyID) {
|
2130 |
static $LAMEmiscSourceSampleFrequencyLookup = array( |
|
2131 |
0 => '<= 32 kHz', |
|
2132 |
1 => '44.1 kHz', |
|
2133 |
2 => '48 kHz', |
|
2134 |
3 => '> 48kHz' |
|
2135 |
); |
|
2136 |
return (isset($LAMEmiscSourceSampleFrequencyLookup[$SourceSampleFrequencyID]) ? $LAMEmiscSourceSampleFrequencyLookup[$SourceSampleFrequencyID] : ''); |
|
2137 |
} |
|
2138 |
||
| 16 | 2139 |
/** |
2140 |
* @param int $SurroundInfoID |
|
2141 |
* |
|
2142 |
* @return string |
|
2143 |
*/ |
|
| 0 | 2144 |
public static function LAMEsurroundInfoLookup($SurroundInfoID) {
|
2145 |
static $LAMEsurroundInfoLookup = array( |
|
2146 |
0 => 'no surround info', |
|
2147 |
1 => 'DPL encoding', |
|
2148 |
2 => 'DPL2 encoding', |
|
2149 |
3 => 'Ambisonic encoding' |
|
2150 |
); |
|
2151 |
return (isset($LAMEsurroundInfoLookup[$SurroundInfoID]) ? $LAMEsurroundInfoLookup[$SurroundInfoID] : 'reserved'); |
|
2152 |
} |
|
2153 |
||
| 16 | 2154 |
/** |
2155 |
* @param array $LAMEtag |
|
2156 |
* |
|
2157 |
* @return string |
|
2158 |
*/ |
|
| 0 | 2159 |
public static function LAMEpresetUsedLookup($LAMEtag) {
|
2160 |
||
2161 |
if ($LAMEtag['preset_used_id'] == 0) {
|
|
2162 |
// no preset used (LAME >=3.93) |
|
2163 |
// no preset recorded (LAME <3.93) |
|
2164 |
return ''; |
|
2165 |
} |
|
2166 |
$LAMEpresetUsedLookup = array(); |
|
2167 |
||
2168 |
///// THIS PART CANNOT BE STATIC . |
|
2169 |
for ($i = 8; $i <= 320; $i++) {
|
|
2170 |
switch ($LAMEtag['vbr_method']) {
|
|
2171 |
case 'cbr': |
|
2172 |
$LAMEpresetUsedLookup[$i] = '--alt-preset '.$LAMEtag['vbr_method'].' '.$i; |
|
2173 |
break; |
|
2174 |
case 'abr': |
|
2175 |
default: // other VBR modes shouldn't be here(?) |
|
2176 |
$LAMEpresetUsedLookup[$i] = '--alt-preset '.$i; |
|
2177 |
break; |
|
2178 |
} |
|
2179 |
} |
|
2180 |
||
2181 |
// named old-style presets (studio, phone, voice, etc) are handled in GuessEncoderOptions() |
|
2182 |
||
2183 |
// named alt-presets |
|
2184 |
$LAMEpresetUsedLookup[1000] = '--r3mix'; |
|
2185 |
$LAMEpresetUsedLookup[1001] = '--alt-preset standard'; |
|
2186 |
$LAMEpresetUsedLookup[1002] = '--alt-preset extreme'; |
|
2187 |
$LAMEpresetUsedLookup[1003] = '--alt-preset insane'; |
|
2188 |
$LAMEpresetUsedLookup[1004] = '--alt-preset fast standard'; |
|
2189 |
$LAMEpresetUsedLookup[1005] = '--alt-preset fast extreme'; |
|
2190 |
$LAMEpresetUsedLookup[1006] = '--alt-preset medium'; |
|
2191 |
$LAMEpresetUsedLookup[1007] = '--alt-preset fast medium'; |
|
2192 |
||
2193 |
// LAME 3.94 additions/changes |
|
2194 |
$LAMEpresetUsedLookup[1010] = '--preset portable'; // 3.94a15 Oct 21 2003 |
|
2195 |
$LAMEpresetUsedLookup[1015] = '--preset radio'; // 3.94a15 Oct 21 2003 |
|
2196 |
||
2197 |
$LAMEpresetUsedLookup[320] = '--preset insane'; // 3.94a15 Nov 12 2003 |
|
2198 |
$LAMEpresetUsedLookup[410] = '-V9'; |
|
2199 |
$LAMEpresetUsedLookup[420] = '-V8'; |
|
2200 |
$LAMEpresetUsedLookup[440] = '-V6'; |
|
2201 |
$LAMEpresetUsedLookup[430] = '--preset radio'; // 3.94a15 Nov 12 2003 |
|
2202 |
$LAMEpresetUsedLookup[450] = '--preset '.(($LAMEtag['raw']['vbr_method'] == 4) ? 'fast ' : '').'portable'; // 3.94a15 Nov 12 2003 |
|
2203 |
$LAMEpresetUsedLookup[460] = '--preset '.(($LAMEtag['raw']['vbr_method'] == 4) ? 'fast ' : '').'medium'; // 3.94a15 Nov 12 2003 |
|
2204 |
$LAMEpresetUsedLookup[470] = '--r3mix'; // 3.94b1 Dec 18 2003 |
|
2205 |
$LAMEpresetUsedLookup[480] = '--preset '.(($LAMEtag['raw']['vbr_method'] == 4) ? 'fast ' : '').'standard'; // 3.94a15 Nov 12 2003 |
|
2206 |
$LAMEpresetUsedLookup[490] = '-V1'; |
|
2207 |
$LAMEpresetUsedLookup[500] = '--preset '.(($LAMEtag['raw']['vbr_method'] == 4) ? 'fast ' : '').'extreme'; // 3.94a15 Nov 12 2003 |
|
2208 |
||
2209 |
return (isset($LAMEpresetUsedLookup[$LAMEtag['preset_used_id']]) ? $LAMEpresetUsedLookup[$LAMEtag['preset_used_id']] : 'new/unknown preset: '.$LAMEtag['preset_used_id'].' - report to info@getid3.org'); |
|
2210 |
} |
|
2211 |
||
|
7
cf61fcea0001
resynchronize code repo with production
ymh <ymh.work@gmail.com>
parents:
5
diff
changeset
|
2212 |
} |