<?php

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/////////////////////////////////////////////////////////////////

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/// getID3() by James Heinrich <info@getid3.org> //

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// 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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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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// number of frames to scan to determine if MPEG-audio sequence is valid

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// Lower this number to 5-20 for faster scanning

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// Increase this number to 50+ for most accurate detection of valid VBR/CBR

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// mpeg-audio streams

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define('GETID3_MP3_VALID_CHECK_FRAMES', 35);

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class getid3_mp3 extends getid3_handler

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{

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/**

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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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* @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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$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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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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$this->warning($synchoffsetwarning);

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}

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if (isset($info['mpeg']['audio']['LAME'])) {

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$info['audio']['codec'] = 'LAME';

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if (!empty($info['mpeg']['audio']['LAME']['long_version'])) {

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$info['audio']['encoder'] = rtrim($info['mpeg']['audio']['LAME']['long_version'], "\x00");

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} elseif (!empty($info['mpeg']['audio']['LAME']['short_version'])) {

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$info['audio']['encoder'] = rtrim($info['mpeg']['audio']['LAME']['short_version'], "\x00");

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}

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}

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$CurrentDataLAMEversionString = (!empty($CurrentDataLAMEversionString) ? $CurrentDataLAMEversionString : (isset($info['audio']['encoder']) ? $info['audio']['encoder'] : ''));

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if (!empty($CurrentDataLAMEversionString) && (substr($CurrentDataLAMEversionString, 0, 6) == 'LAME3.') && !preg_match('[0-9\)]', substr($CurrentDataLAMEversionString, -1))) {

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// a version number of LAME that does not end with a number like "LAME3.92"

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// or with a closing parenthesis like "LAME3.88 (alpha)"

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// or a version of LAME with the LAMEtag-not-filled-in-DLL-mode bug (3.90-3.92)

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// not sure what the actual last frame length will be, but will be less than or equal to 1441

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$PossiblyLongerLAMEversion_FrameLength = 1441;

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// Not sure what version of LAME this is - look in padding of last frame for longer version string

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$PossibleLAMEversionStringOffset = $info['avdataend'] - $PossiblyLongerLAMEversion_FrameLength;

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$this->fseek($PossibleLAMEversionStringOffset);

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$PossiblyLongerLAMEversion_Data = $this->fread($PossiblyLongerLAMEversion_FrameLength);

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switch (substr($CurrentDataLAMEversionString, -1)) {

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case 'a':

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case 'b':

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// "LAME3.94a" will have a longer version string of "LAME3.94 (alpha)" for example

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// need to trim off "a" to match longer string

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$CurrentDataLAMEversionString = substr($CurrentDataLAMEversionString, 0, -1);

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break;

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}

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if (($PossiblyLongerLAMEversion_String = strstr($PossiblyLongerLAMEversion_Data, $CurrentDataLAMEversionString)) !== false) {

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if (substr($PossiblyLongerLAMEversion_String, 0, strlen($CurrentDataLAMEversionString)) == $CurrentDataLAMEversionString) {

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$PossiblyLongerLAMEversion_NewString = substr($PossiblyLongerLAMEversion_String, 0, strspn($PossiblyLongerLAMEversion_String, 'LAME0123456789., (abcdefghijklmnopqrstuvwxyzJFSOND)')); //"LAME3.90.3" "LAME3.87 (beta 1, Sep 27 2000)" "LAME3.88 (beta)"

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if (empty($info['audio']['encoder']) || (strlen($PossiblyLongerLAMEversion_NewString) > strlen($info['audio']['encoder']))) {

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$info['audio']['encoder'] = $PossiblyLongerLAMEversion_NewString;

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}

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}

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}

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}

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if (!empty($info['audio']['encoder'])) {

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$info['audio']['encoder'] = rtrim($info['audio']['encoder'], "\x00 ");

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}

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switch (isset($info['mpeg']['audio']['layer']) ? $info['mpeg']['audio']['layer'] : '') {

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case 1:

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case 2:

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$info['audio']['dataformat'] = 'mp'.$info['mpeg']['audio']['layer'];

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break;

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}

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if (isset($info['fileformat']) && ($info['fileformat'] == 'mp3')) {

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switch ($info['audio']['dataformat']) {

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case 'mp1':

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case 'mp2':

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case 'mp3':

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$info['fileformat'] = $info['audio']['dataformat'];

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break;

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default:

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$this->warning('Expecting [audio][dataformat] to be mp1/mp2/mp3 when fileformat == mp3, [audio][dataformat] actually "'.$info['audio']['dataformat'].'"');

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break;

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}

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}

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if (empty($info['fileformat'])) {

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unset($info['fileformat']);

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unset($info['audio']['bitrate_mode']);

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unset($info['avdataoffset']);

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unset($info['avdataend']);

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return false;

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}

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$info['mime_type'] = 'audio/mpeg';

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$info['audio']['lossless'] = false;

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// Calculate playtime

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if (!isset($info['playtime_seconds']) && isset($info['audio']['bitrate']) && ($info['audio']['bitrate'] > 0)) {

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// 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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}

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$info['audio']['encoder_options'] = $this->GuessEncoderOptions();

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return true;

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}

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/**

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* @return string

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*/

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public function GuessEncoderOptions() {

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// shortcuts

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$info = &$this->getid3->info;

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$thisfile_mpeg_audio = array();

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$thisfile_mpeg_audio_lame = array();

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if (!empty($info['mpeg']['audio'])) {

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$thisfile_mpeg_audio = &$info['mpeg']['audio'];

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if (!empty($thisfile_mpeg_audio['LAME'])) {

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$thisfile_mpeg_audio_lame = &$thisfile_mpeg_audio['LAME'];

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}

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}

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$encoder_options = '';

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static $NamedPresetBitrates = array(16, 24, 40, 56, 112, 128, 160, 192, 256);

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if (isset($thisfile_mpeg_audio['VBR_method']) && ($thisfile_mpeg_audio['VBR_method'] == 'Fraunhofer') && !empty($thisfile_mpeg_audio['VBR_quality'])) {

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$encoder_options = 'VBR q'.$thisfile_mpeg_audio['VBR_quality'];

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} elseif (!empty($thisfile_mpeg_audio_lame['preset_used']) && isset($thisfile_mpeg_audio_lame['preset_used_id']) && (!in_array($thisfile_mpeg_audio_lame['preset_used_id'], $NamedPresetBitrates))) {

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$encoder_options = $thisfile_mpeg_audio_lame['preset_used'];

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} elseif (!empty($thisfile_mpeg_audio_lame['vbr_quality'])) {

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static $KnownEncoderValues = array();

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if (empty($KnownEncoderValues)) {

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//$KnownEncoderValues[abrbitrate_minbitrate][vbr_quality][raw_vbr_method][raw_noise_shaping][raw_stereo_mode][ath_type][lowpass_frequency] = 'preset name';

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$KnownEncoderValues[0xFF][58][1][1][3][2][20500] = '--alt-preset insane'; // 3.90, 3.90.1, 3.92

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$KnownEncoderValues[0xFF][58][1][1][3][2][20600] = '--alt-preset insane'; // 3.90.2, 3.90.3, 3.91

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$KnownEncoderValues[0xFF][57][1][1][3][4][20500] = '--alt-preset insane'; // 3.94, 3.95

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$KnownEncoderValues['**'][78][3][2][3][2][19500] = '--alt-preset extreme'; // 3.90, 3.90.1, 3.92

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$KnownEncoderValues['**'][78][3][2][3][2][19600] = '--alt-preset extreme'; // 3.90.2, 3.91

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$KnownEncoderValues['**'][78][3][1][3][2][19600] = '--alt-preset extreme'; // 3.90.3

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$KnownEncoderValues['**'][78][4][2][3][2][19500] = '--alt-preset fast extreme'; // 3.90, 3.90.1, 3.92

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$KnownEncoderValues['**'][78][4][2][3][2][19600] = '--alt-preset fast extreme'; // 3.90.2, 3.90.3, 3.91

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$KnownEncoderValues['**'][78][3][2][3][4][19000] = '--alt-preset standard'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92

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$KnownEncoderValues['**'][78][3][1][3][4][19000] = '--alt-preset standard'; // 3.90.3

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$KnownEncoderValues['**'][78][4][2][3][4][19000] = '--alt-preset fast standard'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92

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$KnownEncoderValues['**'][78][4][1][3][4][19000] = '--alt-preset fast standard'; // 3.90.3

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$KnownEncoderValues['**'][88][4][1][3][3][19500] = '--r3mix'; // 3.90, 3.90.1, 3.92

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$KnownEncoderValues['**'][88][4][1][3][3][19600] = '--r3mix'; // 3.90.2, 3.90.3, 3.91

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$KnownEncoderValues['**'][67][4][1][3][4][18000] = '--r3mix'; // 3.94, 3.95

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$KnownEncoderValues['**'][68][3][2][3][4][18000] = '--alt-preset medium'; // 3.90.3

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$KnownEncoderValues['**'][68][4][2][3][4][18000] = '--alt-preset fast medium'; // 3.90.3

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$KnownEncoderValues[0xFF][99][1][1][1][2][0] = '--preset studio'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92

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$KnownEncoderValues[0xFF][58][2][1][3][2][20600] = '--preset studio'; // 3.90.3, 3.93.1

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$KnownEncoderValues[0xFF][58][2][1][3][2][20500] = '--preset studio'; // 3.93

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$KnownEncoderValues[0xFF][57][2][1][3][4][20500] = '--preset studio'; // 3.94, 3.95

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$KnownEncoderValues[0xC0][88][1][1][1][2][0] = '--preset cd'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92

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$KnownEncoderValues[0xC0][58][2][2][3][2][19600] = '--preset cd'; // 3.90.3, 3.93.1

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$KnownEncoderValues[0xC0][58][2][2][3][2][19500] = '--preset cd'; // 3.93

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$KnownEncoderValues[0xC0][57][2][1][3][4][19500] = '--preset cd'; // 3.94, 3.95

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$KnownEncoderValues[0xA0][78][1][1][3][2][18000] = '--preset hifi'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92

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$KnownEncoderValues[0xA0][58][2][2][3][2][18000] = '--preset hifi'; // 3.90.3, 3.93, 3.93.1

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$KnownEncoderValues[0xA0][57][2][1][3][4][18000] = '--preset hifi'; // 3.94, 3.95

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$KnownEncoderValues[0x80][67][1][1][3][2][18000] = '--preset tape'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92

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$KnownEncoderValues[0x80][67][1][1][3][2][15000] = '--preset radio'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92

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$KnownEncoderValues[0x70][67][1][1][3][2][15000] = '--preset fm'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92

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$KnownEncoderValues[0x70][58][2][2][3][2][16000] = '--preset tape/radio/fm'; // 3.90.3, 3.93, 3.93.1

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$KnownEncoderValues[0x70][57][2][1][3][4][16000] = '--preset tape/radio/fm'; // 3.94, 3.95

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$KnownEncoderValues[0x38][58][2][2][0][2][10000] = '--preset voice'; // 3.90.3, 3.93, 3.93.1

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$KnownEncoderValues[0x38][57][2][1][0][4][15000] = '--preset voice'; // 3.94, 3.95

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$KnownEncoderValues[0x38][57][2][1][0][4][16000] = '--preset voice'; // 3.94a14

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$KnownEncoderValues[0x28][65][1][1][0][2][7500] = '--preset mw-us'; // 3.90, 3.90.1, 3.92

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$KnownEncoderValues[0x28][65][1][1][0][2][7600] = '--preset mw-us'; // 3.90.2, 3.91

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$KnownEncoderValues[0x28][58][2][2][0][2][7000] = '--preset mw-us'; // 3.90.3, 3.93, 3.93.1

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$KnownEncoderValues[0x28][57][2][1][0][4][10500] = '--preset mw-us'; // 3.94, 3.95

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$KnownEncoderValues[0x28][57][2][1][0][4][11200] = '--preset mw-us'; // 3.94a14

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$KnownEncoderValues[0x28][57][2][1][0][4][8800] = '--preset mw-us'; // 3.94a15

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$KnownEncoderValues[0x18][58][2][2][0][2][4000] = '--preset phon+/lw/mw-eu/sw'; // 3.90.3, 3.93.1

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$KnownEncoderValues[0x18][58][2][2][0][2][3900] = '--preset phon+/lw/mw-eu/sw'; // 3.93

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$KnownEncoderValues[0x18][57][2][1][0][4][5900] = '--preset phon+/lw/mw-eu/sw'; // 3.94, 3.95

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$KnownEncoderValues[0x18][57][2][1][0][4][6200] = '--preset phon+/lw/mw-eu/sw'; // 3.94a14

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$KnownEncoderValues[0x18][57][2][1][0][4][3200] = '--preset phon+/lw/mw-eu/sw'; // 3.94a15

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$KnownEncoderValues[0x10][58][2][2][0][2][3800] = '--preset phone'; // 3.90.3, 3.93.1

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$KnownEncoderValues[0x10][58][2][2][0][2][3700] = '--preset phone'; // 3.93

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$KnownEncoderValues[0x10][57][2][1][0][4][5600] = '--preset phone'; // 3.94, 3.95

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}

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if (isset($KnownEncoderValues[$thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate']][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']])) {

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$encoder_options = $KnownEncoderValues[$thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate']][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']];

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} 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']])) {

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$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']];

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} elseif ($info['audio']['bitrate_mode'] == 'vbr') {

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// http://gabriel.mp3-tech.org/mp3infotag.html

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// int Quality = (100 - 10 * gfp->VBR_q - gfp->quality)h

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$LAME_V_value = 10 - ceil($thisfile_mpeg_audio_lame['vbr_quality'] / 10);

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$LAME_q_value = 100 - $thisfile_mpeg_audio_lame['vbr_quality'] - ($LAME_V_value * 10);

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$encoder_options = '-V'.$LAME_V_value.' -q'.$LAME_q_value;

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} elseif ($info['audio']['bitrate_mode'] == 'cbr') {

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[281] Fix | Delete

$encoder_options = strtoupper($info['audio']['bitrate_mode']).ceil($info['audio']['bitrate'] / 1000);

[282] Fix | Delete

[283] Fix | Delete

} else {

[284] Fix | Delete

[285] Fix | Delete

$encoder_options = strtoupper($info['audio']['bitrate_mode']);

[286] Fix | Delete

[287] Fix | Delete

}

[288] Fix | Delete

[289] Fix | Delete

} elseif (!empty($thisfile_mpeg_audio_lame['bitrate_abr'])) {

[290] Fix | Delete

[291] Fix | Delete

$encoder_options = 'ABR'.$thisfile_mpeg_audio_lame['bitrate_abr'];

[292] Fix | Delete

[293] Fix | Delete

} elseif (!empty($info['audio']['bitrate'])) {

[294] Fix | Delete

[295] Fix | Delete

if ($info['audio']['bitrate_mode'] == 'cbr') {

[296] Fix | Delete

$encoder_options = strtoupper($info['audio']['bitrate_mode']).ceil($info['audio']['bitrate'] / 1000);

[297] Fix | Delete

} else {

[298] Fix | Delete

$encoder_options = strtoupper($info['audio']['bitrate_mode']);

[299] Fix | Delete

}

[300] Fix | Delete

[301] Fix | Delete

}

[302] Fix | Delete

if (!empty($thisfile_mpeg_audio_lame['bitrate_min'])) {

[303] Fix | Delete

$encoder_options .= ' -b'.$thisfile_mpeg_audio_lame['bitrate_min'];

[304] Fix | Delete

}

[305] Fix | Delete

[306] Fix | Delete

if (!empty($thisfile_mpeg_audio_lame['encoding_flags']['nogap_prev']) || !empty($thisfile_mpeg_audio_lame['encoding_flags']['nogap_next'])) {

[307] Fix | Delete

$encoder_options .= ' --nogap';

[308] Fix | Delete

}

[309] Fix | Delete

[310] Fix | Delete

if (!empty($thisfile_mpeg_audio_lame['lowpass_frequency'])) {

[311] Fix | Delete

$ExplodedOptions = explode(' ', $encoder_options, 4);

[312] Fix | Delete

if ($ExplodedOptions[0] == '--r3mix') {

[313] Fix | Delete

$ExplodedOptions[1] = 'r3mix';

[314] Fix | Delete

}

[315] Fix | Delete

switch ($ExplodedOptions[0]) {

[316] Fix | Delete

case '--preset':

[317] Fix | Delete

case '--alt-preset':

[318] Fix | Delete

case '--r3mix':

[319] Fix | Delete

if ($ExplodedOptions[1] == 'fast') {

[320] Fix | Delete

$ExplodedOptions[1] .= ' '.$ExplodedOptions[2];

[321] Fix | Delete

}

[322] Fix | Delete

switch ($ExplodedOptions[1]) {

[323] Fix | Delete

case 'portable':

[324] Fix | Delete

case 'medium':

[325] Fix | Delete

case 'standard':

[326] Fix | Delete

case 'extreme':

[327] Fix | Delete

case 'insane':

[328] Fix | Delete

case 'fast portable':

[329] Fix | Delete

case 'fast medium':

[330] Fix | Delete

case 'fast standard':

[331] Fix | Delete

case 'fast extreme':

[332] Fix | Delete

case 'fast insane':

[333] Fix | Delete

case 'r3mix':

[334] Fix | Delete

static $ExpectedLowpass = array(

[335] Fix | Delete

'insane|20500' => 20500,

[336] Fix | Delete

'insane|20600' => 20600, // 3.90.2, 3.90.3, 3.91

[337] Fix | Delete

'medium|18000' => 18000,

[338] Fix | Delete

'fast medium|18000' => 18000,

[339] Fix | Delete

'extreme|19500' => 19500, // 3.90, 3.90.1, 3.92, 3.95

[340] Fix | Delete

'extreme|19600' => 19600, // 3.90.2, 3.90.3, 3.91, 3.93.1

[341] Fix | Delete

'fast extreme|19500' => 19500, // 3.90, 3.90.1, 3.92, 3.95

[342] Fix | Delete

'fast extreme|19600' => 19600, // 3.90.2, 3.90.3, 3.91, 3.93.1

[343] Fix | Delete

'standard|19000' => 19000,

[344] Fix | Delete

'fast standard|19000' => 19000,

[345] Fix | Delete

'r3mix|19500' => 19500, // 3.90, 3.90.1, 3.92

[346] Fix | Delete

'r3mix|19600' => 19600, // 3.90.2, 3.90.3, 3.91

[347] Fix | Delete

'r3mix|18000' => 18000, // 3.94, 3.95

[348] Fix | Delete

);

[349] Fix | Delete

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))) {

[350] Fix | Delete

$encoder_options .= ' --lowpass '.$thisfile_mpeg_audio_lame['lowpass_frequency'];

[351] Fix | Delete

}

[352] Fix | Delete

break;

[353] Fix | Delete

[354] Fix | Delete

default:

[355] Fix | Delete

break;

[356] Fix | Delete

}

[357] Fix | Delete

break;

[358] Fix | Delete

}

[359] Fix | Delete

}

[360] Fix | Delete

[361] Fix | Delete

if (isset($thisfile_mpeg_audio_lame['raw']['source_sample_freq'])) {

[362] Fix | Delete

if (($thisfile_mpeg_audio['sample_rate'] == 44100) && ($thisfile_mpeg_audio_lame['raw']['source_sample_freq'] != 1)) {

[363] Fix | Delete

$encoder_options .= ' --resample 44100';

[364] Fix | Delete

} elseif (($thisfile_mpeg_audio['sample_rate'] == 48000) && ($thisfile_mpeg_audio_lame['raw']['source_sample_freq'] != 2)) {

[365] Fix | Delete

$encoder_options .= ' --resample 48000';

[366] Fix | Delete

} elseif ($thisfile_mpeg_audio['sample_rate'] < 44100) {

[367] Fix | Delete

switch ($thisfile_mpeg_audio_lame['raw']['source_sample_freq']) {

[368] Fix | Delete

case 0: // <= 32000

[369] Fix | Delete

// may or may not be same as source frequency - ignore

[370] Fix | Delete

break;

[371] Fix | Delete

case 1: // 44100

[372] Fix | Delete

case 2: // 48000

[373] Fix | Delete

case 3: // 48000+

[374] Fix | Delete

$ExplodedOptions = explode(' ', $encoder_options, 4);

[375] Fix | Delete

switch ($ExplodedOptions[0]) {

[376] Fix | Delete

case '--preset':

[377] Fix | Delete

case '--alt-preset':

[378] Fix | Delete

switch ($ExplodedOptions[1]) {

[379] Fix | Delete

case 'fast':

[380] Fix | Delete

case 'portable':

[381] Fix | Delete

case 'medium':

[382] Fix | Delete

case 'standard':

[383] Fix | Delete

case 'extreme':

[384] Fix | Delete

case 'insane':

[385] Fix | Delete

$encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate'];

[386] Fix | Delete

break;

[387] Fix | Delete

[388] Fix | Delete

default:

[389] Fix | Delete

static $ExpectedResampledRate = array(

[390] Fix | Delete

'phon+/lw/mw-eu/sw|16000' => 16000,

[391] Fix | Delete

'mw-us|24000' => 24000, // 3.95

[392] Fix | Delete

'mw-us|32000' => 32000, // 3.93

[393] Fix | Delete

'mw-us|16000' => 16000, // 3.92

[394] Fix | Delete

'phone|16000' => 16000,

[395] Fix | Delete

'phone|11025' => 11025, // 3.94a15

[396] Fix | Delete

'radio|32000' => 32000, // 3.94a15

[397] Fix | Delete

'fm/radio|32000' => 32000, // 3.92

[398] Fix | Delete

'fm|32000' => 32000, // 3.90

[399] Fix | Delete

'voice|32000' => 32000);

[400] Fix | Delete

if (!isset($ExpectedResampledRate[$ExplodedOptions[1].'|'.$thisfile_mpeg_audio['sample_rate']])) {

[401] Fix | Delete

$encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate'];

[402] Fix | Delete

}

[403] Fix | Delete

break;

[404] Fix | Delete

}

[405] Fix | Delete

break;

[406] Fix | Delete

[407] Fix | Delete

case '--r3mix':

[408] Fix | Delete

default:

[409] Fix | Delete

$encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate'];

[410] Fix | Delete

break;

[411] Fix | Delete

}

[412] Fix | Delete

break;

[413] Fix | Delete

}

[414] Fix | Delete

}

[415] Fix | Delete

}

[416] Fix | Delete

if (empty($encoder_options) && !empty($info['audio']['bitrate']) && !empty($info['audio']['bitrate_mode'])) {

[417] Fix | Delete

//$encoder_options = strtoupper($info['audio']['bitrate_mode']).ceil($info['audio']['bitrate'] / 1000);

[418] Fix | Delete

$encoder_options = strtoupper($info['audio']['bitrate_mode']);

[419] Fix | Delete

}

[420] Fix | Delete

[421] Fix | Delete

return $encoder_options;

[422] Fix | Delete

}

[423] Fix | Delete

[424] Fix | Delete

/**

[425] Fix | Delete

* @param int $offset

[426] Fix | Delete

* @param array $info

[427] Fix | Delete

* @param bool $recursivesearch

[428] Fix | Delete

* @param bool $ScanAsCBR

[429] Fix | Delete

* @param bool $FastMPEGheaderScan

[430] Fix | Delete

*

[431] Fix | Delete

* @return bool

[432] Fix | Delete

*/

[433] Fix | Delete

public function decodeMPEGaudioHeader($offset, &$info, $recursivesearch=true, $ScanAsCBR=false, $FastMPEGheaderScan=false) {

[434] Fix | Delete

static $MPEGaudioVersionLookup;

[435] Fix | Delete

static $MPEGaudioLayerLookup;

[436] Fix | Delete

static $MPEGaudioBitrateLookup;

[437] Fix | Delete

static $MPEGaudioFrequencyLookup;

[438] Fix | Delete

static $MPEGaudioChannelModeLookup;

[439] Fix | Delete

static $MPEGaudioModeExtensionLookup;

[440] Fix | Delete

static $MPEGaudioEmphasisLookup;

[441] Fix | Delete

if (empty($MPEGaudioVersionLookup)) {

[442] Fix | Delete

$MPEGaudioVersionLookup = self::MPEGaudioVersionArray();

[443] Fix | Delete

$MPEGaudioLayerLookup = self::MPEGaudioLayerArray();

[444] Fix | Delete

$MPEGaudioBitrateLookup = self::MPEGaudioBitrateArray();

[445] Fix | Delete

$MPEGaudioFrequencyLookup = self::MPEGaudioFrequencyArray();

[446] Fix | Delete

$MPEGaudioChannelModeLookup = self::MPEGaudioChannelModeArray();

[447] Fix | Delete

$MPEGaudioModeExtensionLookup = self::MPEGaudioModeExtensionArray();

[448] Fix | Delete

$MPEGaudioEmphasisLookup = self::MPEGaudioEmphasisArray();

[449] Fix | Delete

}

[450] Fix | Delete

[451] Fix | Delete

if ($this->fseek($offset) != 0) {

[452] Fix | Delete

$this->error('decodeMPEGaudioHeader() failed to seek to next offset at '.$offset);

[453] Fix | Delete

return false;

[454] Fix | Delete

}

[455] Fix | Delete

//$headerstring = $this->fread(1441); // worst-case max length = 32kHz @ 320kbps layer 3 = 1441 bytes/frame

[456] Fix | Delete

$headerstring = $this->fread(226); // LAME header at offset 36 + 190 bytes of Xing/LAME data

[457] Fix | Delete

[458] Fix | Delete

// MP3 audio frame structure:

[459] Fix | Delete

// $aa $aa $aa $aa [$bb $bb] $cc...

[460] Fix | Delete

// where $aa..$aa is the four-byte mpeg-audio header (below)

[461] Fix | Delete

// $bb $bb is the optional 2-byte CRC

[462] Fix | Delete

// and $cc... is the audio data

[463] Fix | Delete

[464] Fix | Delete

$head4 = substr($headerstring, 0, 4);

[465] Fix | Delete

$head4_key = getid3_lib::PrintHexBytes($head4, true, false, false);

[466] Fix | Delete

static $MPEGaudioHeaderDecodeCache = array();

[467] Fix | Delete

if (isset($MPEGaudioHeaderDecodeCache[$head4_key])) {

[468] Fix | Delete

$MPEGheaderRawArray = $MPEGaudioHeaderDecodeCache[$head4_key];

[469] Fix | Delete

} else {

[470] Fix | Delete

$MPEGheaderRawArray = self::MPEGaudioHeaderDecode($head4);

[471] Fix | Delete

$MPEGaudioHeaderDecodeCache[$head4_key] = $MPEGheaderRawArray;

[472] Fix | Delete

}

[473] Fix | Delete

[474] Fix | Delete

static $MPEGaudioHeaderValidCache = array();

[475] Fix | Delete

if (!isset($MPEGaudioHeaderValidCache[$head4_key])) { // Not in cache

[476] Fix | Delete

//$MPEGaudioHeaderValidCache[$head4_key] = self::MPEGaudioHeaderValid($MPEGheaderRawArray, false, true); // allow badly-formatted freeformat (from LAME 3.90 - 3.93.1)

[477] Fix | Delete

$MPEGaudioHeaderValidCache[$head4_key] = self::MPEGaudioHeaderValid($MPEGheaderRawArray, false, false);

[478] Fix | Delete

}

[479] Fix | Delete

[480] Fix | Delete

// shortcut

[481] Fix | Delete

if (!isset($info['mpeg']['audio'])) {

[482] Fix | Delete

$info['mpeg']['audio'] = array();

[483] Fix | Delete

}

[484] Fix | Delete

$thisfile_mpeg_audio = &$info['mpeg']['audio'];

[485] Fix | Delete

[486] Fix | Delete

if ($MPEGaudioHeaderValidCache[$head4_key]) {

[487] Fix | Delete

$thisfile_mpeg_audio['raw'] = $MPEGheaderRawArray;

[488] Fix | Delete

} else {

[489] Fix | Delete

$this->error('Invalid MPEG audio header ('.getid3_lib::PrintHexBytes($head4).') at offset '.$offset);

[490] Fix | Delete

return false;

[491] Fix | Delete

}

[492] Fix | Delete

[493] Fix | Delete

if (!$FastMPEGheaderScan) {

[494] Fix | Delete

$thisfile_mpeg_audio['version'] = $MPEGaudioVersionLookup[$thisfile_mpeg_audio['raw']['version']];

[495] Fix | Delete

$thisfile_mpeg_audio['layer'] = $MPEGaudioLayerLookup[$thisfile_mpeg_audio['raw']['layer']];

[496] Fix | Delete

[497] Fix | Delete

$thisfile_mpeg_audio['channelmode'] = $MPEGaudioChannelModeLookup[$thisfile_mpeg_audio['raw']['channelmode']];

[498] Fix | Delete

$thisfile_mpeg_audio['channels'] = (($thisfile_mpeg_audio['channelmode'] == 'mono') ? 1 : 2);

[499] Fix | Delete