574 lines
26 KiB
PHP
574 lines
26 KiB
PHP
<?php
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/////////////////////////////////////////////////////////////////
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/// getID3() by James Heinrich <info@getid3.org> //
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// available at http://getid3.sourceforge.net //
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// or http://www.getid3.org //
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/////////////////////////////////////////////////////////////////
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// See readme.txt for more details //
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/////////////////////////////////////////////////////////////////
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// //
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// module.audio.ogg.php //
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// module for analyzing Ogg Vorbis, OggFLAC and Speex files //
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// dependencies: module.audio.flac.php //
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// ///
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/////////////////////////////////////////////////////////////////
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getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.flac.php', __FILE__, true);
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class getid3_ogg
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{
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function getid3_ogg(&$fd, &$ThisFileInfo) {
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$ThisFileInfo['fileformat'] = 'ogg';
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// Warn about illegal tags - only vorbiscomments are allowed
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if (isset($ThisFileInfo['id3v2'])) {
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$ThisFileInfo['warning'][] = 'Illegal ID3v2 tag present.';
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}
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if (isset($ThisFileInfo['id3v1'])) {
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$ThisFileInfo['warning'][] = 'Illegal ID3v1 tag present.';
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}
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if (isset($ThisFileInfo['ape'])) {
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$ThisFileInfo['warning'][] = 'Illegal APE tag present.';
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}
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// Page 1 - Stream Header
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fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
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$oggpageinfo = getid3_ogg::ParseOggPageHeader($fd);
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$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;
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if (ftell($fd) >= GETID3_FREAD_BUFFER_SIZE) {
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$ThisFileInfo['error'][] = 'Could not find start of Ogg page in the first '.GETID3_FREAD_BUFFER_SIZE.' bytes (this might not be an Ogg-Vorbis file?)';
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unset($ThisFileInfo['fileformat']);
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unset($ThisFileInfo['ogg']);
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return false;
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}
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$filedata = fread($fd, $oggpageinfo['page_length']);
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$filedataoffset = 0;
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if (substr($filedata, 0, 4) == 'fLaC') {
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$ThisFileInfo['audio']['dataformat'] = 'flac';
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$ThisFileInfo['audio']['bitrate_mode'] = 'vbr';
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$ThisFileInfo['audio']['lossless'] = true;
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} elseif (substr($filedata, 1, 6) == 'vorbis') {
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$this->ParseVorbisPageHeader($filedata, $filedataoffset, $ThisFileInfo, $oggpageinfo);
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} elseif (substr($filedata, 0, 8) == 'Speex ') {
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// http://www.speex.org/manual/node10.html
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$ThisFileInfo['audio']['dataformat'] = 'speex';
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$ThisFileInfo['mime_type'] = 'audio/speex';
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$ThisFileInfo['audio']['bitrate_mode'] = 'abr';
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$ThisFileInfo['audio']['lossless'] = false;
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$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_string'] = substr($filedata, $filedataoffset, 8); // hard-coded to 'Speex '
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$filedataoffset += 8;
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$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version'] = substr($filedata, $filedataoffset, 20);
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$filedataoffset += 20;
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$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version_id'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['header_size'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode_bitstream_version'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['bitrate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['framesize'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['frames_per_packet'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['extra_headers'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved1'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved2'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$ThisFileInfo['speex']['speex_version'] = trim($ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version']);
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$ThisFileInfo['speex']['sample_rate'] = $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate'];
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$ThisFileInfo['speex']['channels'] = $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels'];
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$ThisFileInfo['speex']['vbr'] = (bool) $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr'];
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$ThisFileInfo['speex']['band_type'] = getid3_ogg::SpeexBandModeLookup($ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode']);
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$ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['speex']['sample_rate'];
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$ThisFileInfo['audio']['channels'] = $ThisFileInfo['speex']['channels'];
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if ($ThisFileInfo['speex']['vbr']) {
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$ThisFileInfo['audio']['bitrate_mode'] = 'vbr';
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}
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} else {
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$ThisFileInfo['error'][] = 'Expecting either "Speex " or "vorbis" identifier strings, found neither';
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unset($ThisFileInfo['ogg']);
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unset($ThisFileInfo['mime_type']);
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return false;
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}
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// Page 2 - Comment Header
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$oggpageinfo = getid3_ogg::ParseOggPageHeader($fd);
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$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;
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switch ($ThisFileInfo['audio']['dataformat']) {
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case 'vorbis':
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$filedata = fread($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']);
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$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($filedata, 0, 1));
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$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, 1, 6); // hard-coded to 'vorbis'
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getid3_ogg::ParseVorbisCommentsFilepointer($fd, $ThisFileInfo);
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break;
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case 'flac':
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if (!getid3_flac::FLACparseMETAdata($fd, $ThisFileInfo)) {
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$ThisFileInfo['error'][] = 'Failed to parse FLAC headers';
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return false;
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}
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break;
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case 'speex':
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fseek($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length'], SEEK_CUR);
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getid3_ogg::ParseVorbisCommentsFilepointer($fd, $ThisFileInfo);
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break;
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}
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// Last Page - Number of Samples
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if (!getid3_lib::intValueSupported($ThisFileInfo['avdataend'])) {
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$ThisFileInfo['warning'][] = 'Unable to parse Ogg end chunk file (PHP does not support file operations beyond '.round(PHP_INT_MAX / 1073741824).'GB)';
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} else {
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fseek($fd, max($ThisFileInfo['avdataend'] - GETID3_FREAD_BUFFER_SIZE, 0), SEEK_SET);
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$LastChunkOfOgg = strrev(fread($fd, GETID3_FREAD_BUFFER_SIZE));
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if ($LastOggSpostion = strpos($LastChunkOfOgg, 'SggO')) {
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fseek($fd, $ThisFileInfo['avdataend'] - ($LastOggSpostion + strlen('SggO')), SEEK_SET);
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$ThisFileInfo['avdataend'] = ftell($fd);
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$ThisFileInfo['ogg']['pageheader']['eos'] = getid3_ogg::ParseOggPageHeader($fd);
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$ThisFileInfo['ogg']['samples'] = $ThisFileInfo['ogg']['pageheader']['eos']['pcm_abs_position'];
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if ($ThisFileInfo['ogg']['samples'] == 0) {
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$ThisFileInfo['error'][] = 'Corrupt Ogg file: eos.number of samples == zero';
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return false;
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}
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$ThisFileInfo['ogg']['bitrate_average'] = (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / ($ThisFileInfo['ogg']['samples'] / $ThisFileInfo['audio']['sample_rate']);
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}
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}
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if (!empty($ThisFileInfo['ogg']['bitrate_average'])) {
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$ThisFileInfo['audio']['bitrate'] = $ThisFileInfo['ogg']['bitrate_average'];
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} elseif (!empty($ThisFileInfo['ogg']['bitrate_nominal'])) {
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$ThisFileInfo['audio']['bitrate'] = $ThisFileInfo['ogg']['bitrate_nominal'];
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} elseif (!empty($ThisFileInfo['ogg']['bitrate_min']) && !empty($ThisFileInfo['ogg']['bitrate_max'])) {
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$ThisFileInfo['audio']['bitrate'] = ($ThisFileInfo['ogg']['bitrate_min'] + $ThisFileInfo['ogg']['bitrate_max']) / 2;
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}
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if (isset($ThisFileInfo['audio']['bitrate']) && !isset($ThisFileInfo['playtime_seconds'])) {
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if ($ThisFileInfo['audio']['bitrate'] == 0) {
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$ThisFileInfo['error'][] = 'Corrupt Ogg file: bitrate_audio == zero';
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return false;
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}
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$ThisFileInfo['playtime_seconds'] = (float) ((($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / $ThisFileInfo['audio']['bitrate']);
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}
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if (isset($ThisFileInfo['ogg']['vendor'])) {
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$ThisFileInfo['audio']['encoder'] = preg_replace('/^Encoded with /', '', $ThisFileInfo['ogg']['vendor']);
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// Vorbis only
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if ($ThisFileInfo['audio']['dataformat'] == 'vorbis') {
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// Vorbis 1.0 starts with Xiph.Org
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if (preg_match('/^Xiph.Org/', $ThisFileInfo['audio']['encoder'])) {
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if ($ThisFileInfo['audio']['bitrate_mode'] == 'abr') {
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// Set -b 128 on abr files
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$ThisFileInfo['audio']['encoder_options'] = '-b '.round($ThisFileInfo['ogg']['bitrate_nominal'] / 1000);
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} elseif (($ThisFileInfo['audio']['bitrate_mode'] == 'vbr') && ($ThisFileInfo['audio']['channels'] == 2) && ($ThisFileInfo['audio']['sample_rate'] >= 44100) && ($ThisFileInfo['audio']['sample_rate'] <= 48000)) {
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// Set -q N on vbr files
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$ThisFileInfo['audio']['encoder_options'] = '-q '.$this->get_quality_from_nominal_bitrate($ThisFileInfo['ogg']['bitrate_nominal']);
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}
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}
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if (empty($ThisFileInfo['audio']['encoder_options']) && !empty($ThisFileInfo['ogg']['bitrate_nominal'])) {
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$ThisFileInfo['audio']['encoder_options'] = 'Nominal bitrate: '.intval(round($ThisFileInfo['ogg']['bitrate_nominal'] / 1000)).'kbps';
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}
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}
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}
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return true;
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}
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static function ParseVorbisPageHeader(&$filedata, &$filedataoffset, &$ThisFileInfo, &$oggpageinfo) {
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$ThisFileInfo['audio']['dataformat'] = 'vorbis';
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$ThisFileInfo['audio']['lossless'] = false;
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$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
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$filedataoffset += 1;
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$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, $filedataoffset, 6); // hard-coded to 'vorbis'
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$filedataoffset += 6;
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$ThisFileInfo['ogg']['bitstreamversion'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$ThisFileInfo['ogg']['numberofchannels'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
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$filedataoffset += 1;
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$ThisFileInfo['audio']['channels'] = $ThisFileInfo['ogg']['numberofchannels'];
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$ThisFileInfo['ogg']['samplerate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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if ($ThisFileInfo['ogg']['samplerate'] == 0) {
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$ThisFileInfo['error'][] = 'Corrupt Ogg file: sample rate == zero';
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return false;
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}
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$ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['ogg']['samplerate'];
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$ThisFileInfo['ogg']['samples'] = 0; // filled in later
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$ThisFileInfo['ogg']['bitrate_average'] = 0; // filled in later
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$ThisFileInfo['ogg']['bitrate_max'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$ThisFileInfo['ogg']['bitrate_nominal'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$ThisFileInfo['ogg']['bitrate_min'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$ThisFileInfo['ogg']['blocksize_small'] = pow(2, getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0x0F);
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$ThisFileInfo['ogg']['blocksize_large'] = pow(2, (getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0xF0) >> 4);
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$ThisFileInfo['ogg']['stop_bit'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); // must be 1, marks end of packet
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$ThisFileInfo['audio']['bitrate_mode'] = 'vbr'; // overridden if actually abr
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if ($ThisFileInfo['ogg']['bitrate_max'] == 0xFFFFFFFF) {
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unset($ThisFileInfo['ogg']['bitrate_max']);
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$ThisFileInfo['audio']['bitrate_mode'] = 'abr';
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}
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if ($ThisFileInfo['ogg']['bitrate_nominal'] == 0xFFFFFFFF) {
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unset($ThisFileInfo['ogg']['bitrate_nominal']);
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}
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if ($ThisFileInfo['ogg']['bitrate_min'] == 0xFFFFFFFF) {
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unset($ThisFileInfo['ogg']['bitrate_min']);
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$ThisFileInfo['audio']['bitrate_mode'] = 'abr';
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}
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return true;
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}
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static function ParseOggPageHeader(&$fd) {
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// http://xiph.org/ogg/vorbis/doc/framing.html
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$oggheader['page_start_offset'] = ftell($fd); // where we started from in the file
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$filedata = fread($fd, GETID3_FREAD_BUFFER_SIZE);
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$filedataoffset = 0;
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while ((substr($filedata, $filedataoffset++, 4) != 'OggS')) {
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if ((ftell($fd) - $oggheader['page_start_offset']) >= GETID3_FREAD_BUFFER_SIZE) {
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// should be found before here
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return false;
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}
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if ((($filedataoffset + 28) > strlen($filedata)) || (strlen($filedata) < 28)) {
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if (feof($fd) || (($filedata .= fread($fd, GETID3_FREAD_BUFFER_SIZE)) === false)) {
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// get some more data, unless eof, in which case fail
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return false;
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}
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}
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}
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$filedataoffset += strlen('OggS') - 1; // page, delimited by 'OggS'
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$oggheader['stream_structver'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
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$filedataoffset += 1;
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$oggheader['flags_raw'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
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$filedataoffset += 1;
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$oggheader['flags']['fresh'] = (bool) ($oggheader['flags_raw'] & 0x01); // fresh packet
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$oggheader['flags']['bos'] = (bool) ($oggheader['flags_raw'] & 0x02); // first page of logical bitstream (bos)
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$oggheader['flags']['eos'] = (bool) ($oggheader['flags_raw'] & 0x04); // last page of logical bitstream (eos)
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$oggheader['pcm_abs_position'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8));
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$filedataoffset += 8;
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$oggheader['stream_serialno'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$oggheader['page_seqno'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$oggheader['page_checksum'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$oggheader['page_segments'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
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$filedataoffset += 1;
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$oggheader['page_length'] = 0;
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for ($i = 0; $i < $oggheader['page_segments']; $i++) {
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$oggheader['segment_table'][$i] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
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$filedataoffset += 1;
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$oggheader['page_length'] += $oggheader['segment_table'][$i];
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}
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$oggheader['header_end_offset'] = $oggheader['page_start_offset'] + $filedataoffset;
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$oggheader['page_end_offset'] = $oggheader['header_end_offset'] + $oggheader['page_length'];
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fseek($fd, $oggheader['header_end_offset'], SEEK_SET);
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return $oggheader;
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}
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static function ParseVorbisCommentsFilepointer(&$fd, &$ThisFileInfo) {
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$OriginalOffset = ftell($fd);
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$CommentStartOffset = $OriginalOffset;
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$commentdataoffset = 0;
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$VorbisCommentPage = 1;
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switch ($ThisFileInfo['audio']['dataformat']) {
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case 'vorbis':
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$CommentStartOffset = $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_start_offset']; // Second Ogg page, after header block
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fseek($fd, $CommentStartOffset, SEEK_SET);
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$commentdataoffset = 27 + $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_segments'];
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$commentdata = fread($fd, getid3_ogg::OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1) + $commentdataoffset);
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$commentdataoffset += (strlen('vorbis') + 1);
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break;
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case 'flac':
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fseek($fd, $ThisFileInfo['flac']['VORBIS_COMMENT']['raw']['offset'] + 4, SEEK_SET);
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$commentdata = fread($fd, $ThisFileInfo['flac']['VORBIS_COMMENT']['raw']['block_length']);
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break;
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case 'speex':
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$CommentStartOffset = $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_start_offset']; // Second Ogg page, after header block
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fseek($fd, $CommentStartOffset, SEEK_SET);
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$commentdataoffset = 27 + $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_segments'];
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$commentdata = fread($fd, getid3_ogg::OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1) + $commentdataoffset);
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break;
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default:
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return false;
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break;
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}
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$VendorSize = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));
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$commentdataoffset += 4;
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$ThisFileInfo['ogg']['vendor'] = substr($commentdata, $commentdataoffset, $VendorSize);
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$commentdataoffset += $VendorSize;
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$CommentsCount = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));
|
|
$commentdataoffset += 4;
|
|
$ThisFileInfo['avdataoffset'] = $CommentStartOffset + $commentdataoffset;
|
|
|
|
$basicfields = array('TITLE', 'ARTIST', 'ALBUM', 'TRACKNUMBER', 'GENRE', 'DATE', 'DESCRIPTION', 'COMMENT');
|
|
$ThisFileInfo_ogg_comments_raw = &$ThisFileInfo['ogg']['comments_raw'];
|
|
for ($i = 0; $i < $CommentsCount; $i++) {
|
|
|
|
$ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] = $CommentStartOffset + $commentdataoffset;
|
|
|
|
if (ftell($fd) < ($ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] + 4)) {
|
|
$VorbisCommentPage++;
|
|
|
|
$oggpageinfo = getid3_ogg::ParseOggPageHeader($fd);
|
|
$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;
|
|
|
|
// First, save what we haven't read yet
|
|
$AsYetUnusedData = substr($commentdata, $commentdataoffset);
|
|
|
|
// Then take that data off the end
|
|
$commentdata = substr($commentdata, 0, $commentdataoffset);
|
|
|
|
// Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct
|
|
$commentdata .= str_repeat("\x00", 27 + $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
|
|
$commentdataoffset += (27 + $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
|
|
|
|
// Finally, stick the unused data back on the end
|
|
$commentdata .= $AsYetUnusedData;
|
|
|
|
//$commentdata .= fread($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']);
|
|
$commentdata .= fread($fd, getid3_ogg::OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1));
|
|
|
|
}
|
|
$ThisFileInfo_ogg_comments_raw[$i]['size'] = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));
|
|
|
|
// replace avdataoffset with position just after the last vorbiscomment
|
|
$ThisFileInfo['avdataoffset'] = $ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] + $ThisFileInfo_ogg_comments_raw[$i]['size'] + 4;
|
|
|
|
$commentdataoffset += 4;
|
|
while ((strlen($commentdata) - $commentdataoffset) < $ThisFileInfo_ogg_comments_raw[$i]['size']) {
|
|
if (($ThisFileInfo_ogg_comments_raw[$i]['size'] > $ThisFileInfo['avdataend']) || ($ThisFileInfo_ogg_comments_raw[$i]['size'] < 0)) {
|
|
$ThisFileInfo['warning'][] = 'Invalid Ogg comment size (comment #'.$i.', claims to be '.number_format($ThisFileInfo_ogg_comments_raw[$i]['size']).' bytes) - aborting reading comments';
|
|
break 2;
|
|
}
|
|
|
|
$VorbisCommentPage++;
|
|
|
|
$oggpageinfo = getid3_ogg::ParseOggPageHeader($fd);
|
|
$ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;
|
|
|
|
// First, save what we haven't read yet
|
|
$AsYetUnusedData = substr($commentdata, $commentdataoffset);
|
|
|
|
// Then take that data off the end
|
|
$commentdata = substr($commentdata, 0, $commentdataoffset);
|
|
|
|
// Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct
|
|
$commentdata .= str_repeat("\x00", 27 + $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
|
|
$commentdataoffset += (27 + $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
|
|
|
|
// Finally, stick the unused data back on the end
|
|
$commentdata .= $AsYetUnusedData;
|
|
|
|
//$commentdata .= fread($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']);
|
|
if (!isset($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage])) {
|
|
$ThisFileInfo['warning'][] = 'undefined Vorbis Comment page "'.$VorbisCommentPage.'" at offset '.ftell($fd);
|
|
break;
|
|
}
|
|
$readlength = getid3_ogg::OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1);
|
|
if ($readlength <= 0) {
|
|
$ThisFileInfo['warning'][] = 'invalid length Vorbis Comment page "'.$VorbisCommentPage.'" at offset '.ftell($fd);
|
|
break;
|
|
}
|
|
$commentdata .= fread($fd, $readlength);
|
|
|
|
//$filebaseoffset += $oggpageinfo['header_end_offset'] - $oggpageinfo['page_start_offset'];
|
|
}
|
|
$commentstring = substr($commentdata, $commentdataoffset, $ThisFileInfo_ogg_comments_raw[$i]['size']);
|
|
$commentdataoffset += $ThisFileInfo_ogg_comments_raw[$i]['size'];
|
|
|
|
if (!$commentstring) {
|
|
|
|
// no comment?
|
|
$ThisFileInfo['warning'][] = 'Blank Ogg comment ['.$i.']';
|
|
|
|
} elseif (strstr($commentstring, '=')) {
|
|
|
|
$commentexploded = explode('=', $commentstring, 2);
|
|
$ThisFileInfo_ogg_comments_raw[$i]['key'] = strtoupper($commentexploded[0]);
|
|
$ThisFileInfo_ogg_comments_raw[$i]['value'] = (isset($commentexploded[1]) ? $commentexploded[1] : '');
|
|
$ThisFileInfo_ogg_comments_raw[$i]['data'] = base64_decode($ThisFileInfo_ogg_comments_raw[$i]['value']);
|
|
|
|
if (preg_match('#^(BM|GIF|\xFF\xD8\xFF|\x89\x50\x4E\x47\x0D\x0A\x1A\x0A|II\x2A\x00|MM\x00\x2A)#s', $ThisFileInfo_ogg_comments_raw[$i]['data'])) {
|
|
$imageinfo = array();
|
|
$imagechunkcheck = getid3_lib::GetDataImageSize($ThisFileInfo_ogg_comments_raw[$i]['data'], $imageinfo);
|
|
unset($imageinfo);
|
|
if (!empty($imagechunkcheck)) {
|
|
$ThisFileInfo_ogg_comments_raw[$i]['image_mime'] = image_type_to_mime_type($imagechunkcheck[2]);
|
|
if ($ThisFileInfo_ogg_comments_raw[$i]['image_mime'] && ($ThisFileInfo_ogg_comments_raw[$i]['image_mime'] != 'application/octet-stream')) {
|
|
unset($ThisFileInfo_ogg_comments_raw[$i]['value']);
|
|
}
|
|
}
|
|
}
|
|
if (isset($ThisFileInfo_ogg_comments_raw[$i]['value'])) {
|
|
unset($ThisFileInfo_ogg_comments_raw[$i]['data']);
|
|
$ThisFileInfo['ogg']['comments'][strtolower($ThisFileInfo_ogg_comments_raw[$i]['key'])][] = $ThisFileInfo_ogg_comments_raw[$i]['value'];
|
|
} else {
|
|
$ThisFileInfo['ogg']['comments']['picture'][] = array('data'=>$ThisFileInfo_ogg_comments_raw[$i]['data'], 'image_mime'=>$ThisFileInfo_ogg_comments_raw[$i]['image_mime']);
|
|
}
|
|
|
|
} else {
|
|
|
|
$ThisFileInfo['warning'][] = '[known problem with CDex >= v1.40, < v1.50b7] Invalid Ogg comment name/value pair ['.$i.']: '.$commentstring;
|
|
|
|
}
|
|
}
|
|
|
|
|
|
// Replay Gain Adjustment
|
|
// http://privatewww.essex.ac.uk/~djmrob/replaygain/
|
|
if (isset($ThisFileInfo['ogg']['comments']) && is_array($ThisFileInfo['ogg']['comments'])) {
|
|
foreach ($ThisFileInfo['ogg']['comments'] as $index => $commentvalue) {
|
|
switch ($index) {
|
|
case 'rg_audiophile':
|
|
case 'replaygain_album_gain':
|
|
$ThisFileInfo['replay_gain']['album']['adjustment'] = (double) $commentvalue[0];
|
|
unset($ThisFileInfo['ogg']['comments'][$index]);
|
|
break;
|
|
|
|
case 'rg_radio':
|
|
case 'replaygain_track_gain':
|
|
$ThisFileInfo['replay_gain']['track']['adjustment'] = (double) $commentvalue[0];
|
|
unset($ThisFileInfo['ogg']['comments'][$index]);
|
|
break;
|
|
|
|
case 'replaygain_album_peak':
|
|
$ThisFileInfo['replay_gain']['album']['peak'] = (double) $commentvalue[0];
|
|
unset($ThisFileInfo['ogg']['comments'][$index]);
|
|
break;
|
|
|
|
case 'rg_peak':
|
|
case 'replaygain_track_peak':
|
|
$ThisFileInfo['replay_gain']['track']['peak'] = (double) $commentvalue[0];
|
|
unset($ThisFileInfo['ogg']['comments'][$index]);
|
|
break;
|
|
|
|
|
|
default:
|
|
// do nothing
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
fseek($fd, $OriginalOffset, SEEK_SET);
|
|
|
|
return true;
|
|
}
|
|
|
|
static function SpeexBandModeLookup($mode) {
|
|
static $SpeexBandModeLookup = array();
|
|
if (empty($SpeexBandModeLookup)) {
|
|
$SpeexBandModeLookup[0] = 'narrow';
|
|
$SpeexBandModeLookup[1] = 'wide';
|
|
$SpeexBandModeLookup[2] = 'ultra-wide';
|
|
}
|
|
return (isset($SpeexBandModeLookup[$mode]) ? $SpeexBandModeLookup[$mode] : null);
|
|
}
|
|
|
|
|
|
static function OggPageSegmentLength($OggInfoArray, $SegmentNumber=1) {
|
|
for ($i = 0; $i < $SegmentNumber; $i++) {
|
|
$segmentlength = 0;
|
|
foreach ($OggInfoArray['segment_table'] as $key => $value) {
|
|
$segmentlength += $value;
|
|
if ($value < 255) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return $segmentlength;
|
|
}
|
|
|
|
|
|
static function get_quality_from_nominal_bitrate($nominal_bitrate) {
|
|
|
|
// decrease precision
|
|
$nominal_bitrate = $nominal_bitrate / 1000;
|
|
|
|
if ($nominal_bitrate < 128) {
|
|
// q-1 to q4
|
|
$qval = ($nominal_bitrate - 64) / 16;
|
|
} elseif ($nominal_bitrate < 256) {
|
|
// q4 to q8
|
|
$qval = $nominal_bitrate / 32;
|
|
} elseif ($nominal_bitrate < 320) {
|
|
// q8 to q9
|
|
$qval = ($nominal_bitrate + 256) / 64;
|
|
} else {
|
|
// q9 to q10
|
|
$qval = ($nominal_bitrate + 1300) / 180;
|
|
}
|
|
//return $qval; // 5.031324
|
|
//return intval($qval); // 5
|
|
return round($qval, 1); // 5 or 4.9
|
|
}
|
|
|
|
}
|
|
|
|
?>
|