--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/ID3/module.audio.ogg.php Wed Nov 06 03:21:17 2013 +0000
@@ -0,0 +1,671 @@
+<?php
+/////////////////////////////////////////////////////////////////
+/// getID3() by James Heinrich <info@getid3.org> //
+// available at http://getid3.sourceforge.net //
+// or http://www.getid3.org //
+/////////////////////////////////////////////////////////////////
+// See readme.txt for more details //
+/////////////////////////////////////////////////////////////////
+// //
+// module.audio.ogg.php //
+// module for analyzing Ogg Vorbis, OggFLAC and Speex files //
+// dependencies: module.audio.flac.php //
+// ///
+/////////////////////////////////////////////////////////////////
+
+getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.flac.php', __FILE__, true);
+
+class getid3_ogg extends getid3_handler
+{
+ // http://xiph.org/vorbis/doc/Vorbis_I_spec.html
+ public function Analyze() {
+ $info = &$this->getid3->info;
+
+ $info['fileformat'] = 'ogg';
+
+ // Warn about illegal tags - only vorbiscomments are allowed
+ if (isset($info['id3v2'])) {
+ $info['warning'][] = 'Illegal ID3v2 tag present.';
+ }
+ if (isset($info['id3v1'])) {
+ $info['warning'][] = 'Illegal ID3v1 tag present.';
+ }
+ if (isset($info['ape'])) {
+ $info['warning'][] = 'Illegal APE tag present.';
+ }
+
+
+ // Page 1 - Stream Header
+
+ $this->fseek($info['avdataoffset']);
+
+ $oggpageinfo = $this->ParseOggPageHeader();
+ $info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;
+
+ if ($this->ftell() >= $this->getid3->fread_buffer_size()) {
+ $info['error'][] = 'Could not find start of Ogg page in the first '.$this->getid3->fread_buffer_size().' bytes (this might not be an Ogg-Vorbis file?)';
+ unset($info['fileformat']);
+ unset($info['ogg']);
+ return false;
+ }
+
+ $filedata = $this->fread($oggpageinfo['page_length']);
+ $filedataoffset = 0;
+
+ if (substr($filedata, 0, 4) == 'fLaC') {
+
+ $info['audio']['dataformat'] = 'flac';
+ $info['audio']['bitrate_mode'] = 'vbr';
+ $info['audio']['lossless'] = true;
+
+ } elseif (substr($filedata, 1, 6) == 'vorbis') {
+
+ $this->ParseVorbisPageHeader($filedata, $filedataoffset, $oggpageinfo);
+
+ } elseif (substr($filedata, 0, 8) == 'Speex ') {
+
+ // http://www.speex.org/manual/node10.html
+
+ $info['audio']['dataformat'] = 'speex';
+ $info['mime_type'] = 'audio/speex';
+ $info['audio']['bitrate_mode'] = 'abr';
+ $info['audio']['lossless'] = false;
+
+ $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_string'] = substr($filedata, $filedataoffset, 8); // hard-coded to 'Speex '
+ $filedataoffset += 8;
+ $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version'] = substr($filedata, $filedataoffset, 20);
+ $filedataoffset += 20;
+ $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version_id'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
+ $filedataoffset += 4;
+ $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['header_size'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
+ $filedataoffset += 4;
+ $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
+ $filedataoffset += 4;
+ $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
+ $filedataoffset += 4;
+ $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode_bitstream_version'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
+ $filedataoffset += 4;
+ $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
+ $filedataoffset += 4;
+ $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['bitrate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
+ $filedataoffset += 4;
+ $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['framesize'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
+ $filedataoffset += 4;
+ $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
+ $filedataoffset += 4;
+ $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['frames_per_packet'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
+ $filedataoffset += 4;
+ $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['extra_headers'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
+ $filedataoffset += 4;
+ $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved1'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
+ $filedataoffset += 4;
+ $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved2'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
+ $filedataoffset += 4;
+
+ $info['speex']['speex_version'] = trim($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version']);
+ $info['speex']['sample_rate'] = $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate'];
+ $info['speex']['channels'] = $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels'];
+ $info['speex']['vbr'] = (bool) $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr'];
+ $info['speex']['band_type'] = $this->SpeexBandModeLookup($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode']);
+
+ $info['audio']['sample_rate'] = $info['speex']['sample_rate'];
+ $info['audio']['channels'] = $info['speex']['channels'];
+ if ($info['speex']['vbr']) {
+ $info['audio']['bitrate_mode'] = 'vbr';
+ }
+
+
+ } elseif (substr($filedata, 0, 8) == "fishead\x00") {
+
+ // Ogg Skeleton version 3.0 Format Specification
+ // http://xiph.org/ogg/doc/skeleton.html
+ $filedataoffset += 8;
+ $info['ogg']['skeleton']['fishead']['raw']['version_major'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 2));
+ $filedataoffset += 2;
+ $info['ogg']['skeleton']['fishead']['raw']['version_minor'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 2));
+ $filedataoffset += 2;
+ $info['ogg']['skeleton']['fishead']['raw']['presentationtime_numerator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8));
+ $filedataoffset += 8;
+ $info['ogg']['skeleton']['fishead']['raw']['presentationtime_denominator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8));
+ $filedataoffset += 8;
+ $info['ogg']['skeleton']['fishead']['raw']['basetime_numerator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8));
+ $filedataoffset += 8;
+ $info['ogg']['skeleton']['fishead']['raw']['basetime_denominator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8));
+ $filedataoffset += 8;
+ $info['ogg']['skeleton']['fishead']['raw']['utc'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 20));
+ $filedataoffset += 20;
+
+ $info['ogg']['skeleton']['fishead']['version'] = $info['ogg']['skeleton']['fishead']['raw']['version_major'].'.'.$info['ogg']['skeleton']['fishead']['raw']['version_minor'];
+ $info['ogg']['skeleton']['fishead']['presentationtime'] = $info['ogg']['skeleton']['fishead']['raw']['presentationtime_numerator'] / $info['ogg']['skeleton']['fishead']['raw']['presentationtime_denominator'];
+ $info['ogg']['skeleton']['fishead']['basetime'] = $info['ogg']['skeleton']['fishead']['raw']['basetime_numerator'] / $info['ogg']['skeleton']['fishead']['raw']['basetime_denominator'];
+ $info['ogg']['skeleton']['fishead']['utc'] = $info['ogg']['skeleton']['fishead']['raw']['utc'];
+
+
+ $counter = 0;
+ do {
+ $oggpageinfo = $this->ParseOggPageHeader();
+ $info['ogg']['pageheader'][$oggpageinfo['page_seqno'].'.'.$counter++] = $oggpageinfo;
+ $filedata = $this->fread($oggpageinfo['page_length']);
+ $this->fseek($oggpageinfo['page_end_offset']);
+
+ if (substr($filedata, 0, 8) == "fisbone\x00") {
+
+ $filedataoffset = 8;
+ $info['ogg']['skeleton']['fisbone']['raw']['message_header_offset'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
+ $filedataoffset += 4;
+ $info['ogg']['skeleton']['fisbone']['raw']['serial_number'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
+ $filedataoffset += 4;
+ $info['ogg']['skeleton']['fisbone']['raw']['number_header_packets'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
+ $filedataoffset += 4;
+ $info['ogg']['skeleton']['fisbone']['raw']['granulerate_numerator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8));
+ $filedataoffset += 8;
+ $info['ogg']['skeleton']['fisbone']['raw']['granulerate_denominator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8));
+ $filedataoffset += 8;
+ $info['ogg']['skeleton']['fisbone']['raw']['basegranule'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8));
+ $filedataoffset += 8;
+ $info['ogg']['skeleton']['fisbone']['raw']['preroll'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
+ $filedataoffset += 4;
+ $info['ogg']['skeleton']['fisbone']['raw']['granuleshift'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
+ $filedataoffset += 1;
+ $info['ogg']['skeleton']['fisbone']['raw']['padding'] = substr($filedata, $filedataoffset, 3);
+ $filedataoffset += 3;
+
+ } elseif (substr($filedata, 1, 6) == 'theora') {
+
+ $info['video']['dataformat'] = 'theora';
+ $info['error'][] = 'Ogg Theora not correctly handled in this version of getID3 ['.$this->getid3->version().']';
+ //break;
+
+ } elseif (substr($filedata, 1, 6) == 'vorbis') {
+
+ $this->ParseVorbisPageHeader($filedata, $filedataoffset, $oggpageinfo);
+
+ } else {
+ $info['error'][] = 'unexpected';
+ //break;
+ }
+ //} while ($oggpageinfo['page_seqno'] == 0);
+ } while (($oggpageinfo['page_seqno'] == 0) && (substr($filedata, 0, 8) != "fisbone\x00"));
+
+ $this->fseek($oggpageinfo['page_start_offset']);
+
+ $info['error'][] = 'Ogg Skeleton not correctly handled in this version of getID3 ['.$this->getid3->version().']';
+ //return false;
+
+ } else {
+
+ $info['error'][] = 'Expecting either "Speex " or "vorbis" identifier strings, found "'.substr($filedata, 0, 8).'"';
+ unset($info['ogg']);
+ unset($info['mime_type']);
+ return false;
+
+ }
+
+ // Page 2 - Comment Header
+ $oggpageinfo = $this->ParseOggPageHeader();
+ $info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;
+
+ switch ($info['audio']['dataformat']) {
+ case 'vorbis':
+ $filedata = $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']);
+ $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($filedata, 0, 1));
+ $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, 1, 6); // hard-coded to 'vorbis'
+
+ $this->ParseVorbisComments();
+ break;
+
+ case 'flac':
+ $flac = new getid3_flac($this->getid3);
+ if (!$flac->parseMETAdata()) {
+ $info['error'][] = 'Failed to parse FLAC headers';
+ return false;
+ }
+ unset($flac);
+ break;
+
+ case 'speex':
+ $this->fseek($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length'], SEEK_CUR);
+ $this->ParseVorbisComments();
+ break;
+ }
+
+
+ // Last Page - Number of Samples
+ if (!getid3_lib::intValueSupported($info['avdataend'])) {
+
+ $info['warning'][] = 'Unable to parse Ogg end chunk file (PHP does not support file operations beyond '.round(PHP_INT_MAX / 1073741824).'GB)';
+
+ } else {
+
+ $this->fseek(max($info['avdataend'] - $this->getid3->fread_buffer_size(), 0));
+ $LastChunkOfOgg = strrev($this->fread($this->getid3->fread_buffer_size()));
+ if ($LastOggSpostion = strpos($LastChunkOfOgg, 'SggO')) {
+ $this->fseek($info['avdataend'] - ($LastOggSpostion + strlen('SggO')));
+ $info['avdataend'] = $this->ftell();
+ $info['ogg']['pageheader']['eos'] = $this->ParseOggPageHeader();
+ $info['ogg']['samples'] = $info['ogg']['pageheader']['eos']['pcm_abs_position'];
+ if ($info['ogg']['samples'] == 0) {
+ $info['error'][] = 'Corrupt Ogg file: eos.number of samples == zero';
+ return false;
+ }
+ if (!empty($info['audio']['sample_rate'])) {
+ $info['ogg']['bitrate_average'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / ($info['ogg']['samples'] / $info['audio']['sample_rate']);
+ }
+ }
+
+ }
+
+ if (!empty($info['ogg']['bitrate_average'])) {
+ $info['audio']['bitrate'] = $info['ogg']['bitrate_average'];
+ } elseif (!empty($info['ogg']['bitrate_nominal'])) {
+ $info['audio']['bitrate'] = $info['ogg']['bitrate_nominal'];
+ } elseif (!empty($info['ogg']['bitrate_min']) && !empty($info['ogg']['bitrate_max'])) {
+ $info['audio']['bitrate'] = ($info['ogg']['bitrate_min'] + $info['ogg']['bitrate_max']) / 2;
+ }
+ if (isset($info['audio']['bitrate']) && !isset($info['playtime_seconds'])) {
+ if ($info['audio']['bitrate'] == 0) {
+ $info['error'][] = 'Corrupt Ogg file: bitrate_audio == zero';
+ return false;
+ }
+ $info['playtime_seconds'] = (float) ((($info['avdataend'] - $info['avdataoffset']) * 8) / $info['audio']['bitrate']);
+ }
+
+ if (isset($info['ogg']['vendor'])) {
+ $info['audio']['encoder'] = preg_replace('/^Encoded with /', '', $info['ogg']['vendor']);
+
+ // Vorbis only
+ if ($info['audio']['dataformat'] == 'vorbis') {
+
+ // Vorbis 1.0 starts with Xiph.Org
+ if (preg_match('/^Xiph.Org/', $info['audio']['encoder'])) {
+
+ if ($info['audio']['bitrate_mode'] == 'abr') {
+
+ // Set -b 128 on abr files
+ $info['audio']['encoder_options'] = '-b '.round($info['ogg']['bitrate_nominal'] / 1000);
+
+ } elseif (($info['audio']['bitrate_mode'] == 'vbr') && ($info['audio']['channels'] == 2) && ($info['audio']['sample_rate'] >= 44100) && ($info['audio']['sample_rate'] <= 48000)) {
+ // Set -q N on vbr files
+ $info['audio']['encoder_options'] = '-q '.$this->get_quality_from_nominal_bitrate($info['ogg']['bitrate_nominal']);
+
+ }
+ }
+
+ if (empty($info['audio']['encoder_options']) && !empty($info['ogg']['bitrate_nominal'])) {
+ $info['audio']['encoder_options'] = 'Nominal bitrate: '.intval(round($info['ogg']['bitrate_nominal'] / 1000)).'kbps';
+ }
+ }
+ }
+
+ return true;
+ }
+
+ public function ParseVorbisPageHeader(&$filedata, &$filedataoffset, &$oggpageinfo) {
+ $info = &$this->getid3->info;
+ $info['audio']['dataformat'] = 'vorbis';
+ $info['audio']['lossless'] = false;
+
+ $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
+ $filedataoffset += 1;
+ $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, $filedataoffset, 6); // hard-coded to 'vorbis'
+ $filedataoffset += 6;
+ $info['ogg']['bitstreamversion'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
+ $filedataoffset += 4;
+ $info['ogg']['numberofchannels'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
+ $filedataoffset += 1;
+ $info['audio']['channels'] = $info['ogg']['numberofchannels'];
+ $info['ogg']['samplerate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
+ $filedataoffset += 4;
+ if ($info['ogg']['samplerate'] == 0) {
+ $info['error'][] = 'Corrupt Ogg file: sample rate == zero';
+ return false;
+ }
+ $info['audio']['sample_rate'] = $info['ogg']['samplerate'];
+ $info['ogg']['samples'] = 0; // filled in later
+ $info['ogg']['bitrate_average'] = 0; // filled in later
+ $info['ogg']['bitrate_max'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
+ $filedataoffset += 4;
+ $info['ogg']['bitrate_nominal'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
+ $filedataoffset += 4;
+ $info['ogg']['bitrate_min'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
+ $filedataoffset += 4;
+ $info['ogg']['blocksize_small'] = pow(2, getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0x0F);
+ $info['ogg']['blocksize_large'] = pow(2, (getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0xF0) >> 4);
+ $info['ogg']['stop_bit'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); // must be 1, marks end of packet
+
+ $info['audio']['bitrate_mode'] = 'vbr'; // overridden if actually abr
+ if ($info['ogg']['bitrate_max'] == 0xFFFFFFFF) {
+ unset($info['ogg']['bitrate_max']);
+ $info['audio']['bitrate_mode'] = 'abr';
+ }
+ if ($info['ogg']['bitrate_nominal'] == 0xFFFFFFFF) {
+ unset($info['ogg']['bitrate_nominal']);
+ }
+ if ($info['ogg']['bitrate_min'] == 0xFFFFFFFF) {
+ unset($info['ogg']['bitrate_min']);
+ $info['audio']['bitrate_mode'] = 'abr';
+ }
+ return true;
+ }
+
+ public function ParseOggPageHeader() {
+ // http://xiph.org/ogg/vorbis/doc/framing.html
+ $oggheader['page_start_offset'] = $this->ftell(); // where we started from in the file
+
+ $filedata = $this->fread($this->getid3->fread_buffer_size());
+ $filedataoffset = 0;
+ while ((substr($filedata, $filedataoffset++, 4) != 'OggS')) {
+ if (($this->ftell() - $oggheader['page_start_offset']) >= $this->getid3->fread_buffer_size()) {
+ // should be found before here
+ return false;
+ }
+ if ((($filedataoffset + 28) > strlen($filedata)) || (strlen($filedata) < 28)) {
+ if ($this->feof() || (($filedata .= $this->fread($this->getid3->fread_buffer_size())) === false)) {
+ // get some more data, unless eof, in which case fail
+ return false;
+ }
+ }
+ }
+ $filedataoffset += strlen('OggS') - 1; // page, delimited by 'OggS'
+
+ $oggheader['stream_structver'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
+ $filedataoffset += 1;
+ $oggheader['flags_raw'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
+ $filedataoffset += 1;
+ $oggheader['flags']['fresh'] = (bool) ($oggheader['flags_raw'] & 0x01); // fresh packet
+ $oggheader['flags']['bos'] = (bool) ($oggheader['flags_raw'] & 0x02); // first page of logical bitstream (bos)
+ $oggheader['flags']['eos'] = (bool) ($oggheader['flags_raw'] & 0x04); // last page of logical bitstream (eos)
+
+ $oggheader['pcm_abs_position'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8));
+ $filedataoffset += 8;
+ $oggheader['stream_serialno'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
+ $filedataoffset += 4;
+ $oggheader['page_seqno'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
+ $filedataoffset += 4;
+ $oggheader['page_checksum'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
+ $filedataoffset += 4;
+ $oggheader['page_segments'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
+ $filedataoffset += 1;
+ $oggheader['page_length'] = 0;
+ for ($i = 0; $i < $oggheader['page_segments']; $i++) {
+ $oggheader['segment_table'][$i] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
+ $filedataoffset += 1;
+ $oggheader['page_length'] += $oggheader['segment_table'][$i];
+ }
+ $oggheader['header_end_offset'] = $oggheader['page_start_offset'] + $filedataoffset;
+ $oggheader['page_end_offset'] = $oggheader['header_end_offset'] + $oggheader['page_length'];
+ $this->fseek($oggheader['header_end_offset']);
+
+ return $oggheader;
+ }
+
+ // http://xiph.org/vorbis/doc/Vorbis_I_spec.html#x1-810005
+ public function ParseVorbisComments() {
+ $info = &$this->getid3->info;
+
+ $OriginalOffset = $this->ftell();
+ $commentdataoffset = 0;
+ $VorbisCommentPage = 1;
+
+ switch ($info['audio']['dataformat']) {
+ case 'vorbis':
+ case 'speex':
+ $CommentStartOffset = $info['ogg']['pageheader'][$VorbisCommentPage]['page_start_offset']; // Second Ogg page, after header block
+ $this->fseek($CommentStartOffset);
+ $commentdataoffset = 27 + $info['ogg']['pageheader'][$VorbisCommentPage]['page_segments'];
+ $commentdata = $this->fread(self::OggPageSegmentLength($info['ogg']['pageheader'][$VorbisCommentPage], 1) + $commentdataoffset);
+
+ if ($info['audio']['dataformat'] == 'vorbis') {
+ $commentdataoffset += (strlen('vorbis') + 1);
+ }
+ break;
+
+ case 'flac':
+ $CommentStartOffset = $info['flac']['VORBIS_COMMENT']['raw']['offset'] + 4;
+ $this->fseek($CommentStartOffset);
+ $commentdata = $this->fread($info['flac']['VORBIS_COMMENT']['raw']['block_length']);
+ break;
+
+ default:
+ return false;
+ }
+
+ $VendorSize = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));
+ $commentdataoffset += 4;
+
+ $info['ogg']['vendor'] = substr($commentdata, $commentdataoffset, $VendorSize);
+ $commentdataoffset += $VendorSize;
+
+ $CommentsCount = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));
+ $commentdataoffset += 4;
+ $info['avdataoffset'] = $CommentStartOffset + $commentdataoffset;
+
+ $basicfields = array('TITLE', 'ARTIST', 'ALBUM', 'TRACKNUMBER', 'GENRE', 'DATE', 'DESCRIPTION', 'COMMENT');
+ $ThisFileInfo_ogg_comments_raw = &$info['ogg']['comments_raw'];
+ for ($i = 0; $i < $CommentsCount; $i++) {
+
+ $ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] = $CommentStartOffset + $commentdataoffset;
+
+ if ($this->ftell() < ($ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] + 4)) {
+ if ($oggpageinfo = $this->ParseOggPageHeader()) {
+ $info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;
+
+ $VorbisCommentPage++;
+
+ // 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 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
+ $commentdataoffset += (27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
+
+ // Finally, stick the unused data back on the end
+ $commentdata .= $AsYetUnusedData;
+
+ //$commentdata .= $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']);
+ $commentdata .= $this->fread($this->OggPageSegmentLength($info['ogg']['pageheader'][$VorbisCommentPage], 1));
+ }
+
+ }
+ $ThisFileInfo_ogg_comments_raw[$i]['size'] = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));
+
+ // replace avdataoffset with position just after the last vorbiscomment
+ $info['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'] > $info['avdataend']) || ($ThisFileInfo_ogg_comments_raw[$i]['size'] < 0)) {
+ $info['warning'][] = 'Invalid Ogg comment size (comment #'.$i.', claims to be '.number_format($ThisFileInfo_ogg_comments_raw[$i]['size']).' bytes) - aborting reading comments';
+ break 2;
+ }
+
+ $VorbisCommentPage++;
+
+ $oggpageinfo = $this->ParseOggPageHeader();
+ $info['ogg']['pageheader'][$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 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
+ $commentdataoffset += (27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
+
+ // Finally, stick the unused data back on the end
+ $commentdata .= $AsYetUnusedData;
+
+ //$commentdata .= $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']);
+ if (!isset($info['ogg']['pageheader'][$VorbisCommentPage])) {
+ $info['warning'][] = 'undefined Vorbis Comment page "'.$VorbisCommentPage.'" at offset '.$this->ftell();
+ break;
+ }
+ $readlength = self::OggPageSegmentLength($info['ogg']['pageheader'][$VorbisCommentPage], 1);
+ if ($readlength <= 0) {
+ $info['warning'][] = 'invalid length Vorbis Comment page "'.$VorbisCommentPage.'" at offset '.$this->ftell();
+ break;
+ }
+ $commentdata .= $this->fread($readlength);
+
+ //$filebaseoffset += $oggpageinfo['header_end_offset'] - $oggpageinfo['page_start_offset'];
+ }
+ $ThisFileInfo_ogg_comments_raw[$i]['offset'] = $commentdataoffset;
+ $commentstring = substr($commentdata, $commentdataoffset, $ThisFileInfo_ogg_comments_raw[$i]['size']);
+ $commentdataoffset += $ThisFileInfo_ogg_comments_raw[$i]['size'];
+
+ if (!$commentstring) {
+
+ // no comment?
+ $info['warning'][] = 'Blank Ogg comment ['.$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]) ? $commentexploded[1] : '');
+
+ if ($ThisFileInfo_ogg_comments_raw[$i]['key'] == 'METADATA_BLOCK_PICTURE') {
+
+ // http://wiki.xiph.org/VorbisComment#METADATA_BLOCK_PICTURE
+ // The unencoded format is that of the FLAC picture block. The fields are stored in big endian order as in FLAC, picture data is stored according to the relevant standard.
+ // http://flac.sourceforge.net/format.html#metadata_block_picture
+ $flac = new getid3_flac($this->getid3);
+ $flac->setStringMode(base64_decode($ThisFileInfo_ogg_comments_raw[$i]['value']));
+ $flac->parsePICTURE();
+ $info['ogg']['comments']['picture'][] = $flac->getid3->info['flac']['PICTURE'][0];
+ unset($flac);
+
+ } elseif ($ThisFileInfo_ogg_comments_raw[$i]['key'] == 'COVERART') {
+
+ $data = base64_decode($ThisFileInfo_ogg_comments_raw[$i]['value']);
+ $this->notice('Found deprecated COVERART tag, it should be replaced in honor of METADATA_BLOCK_PICTURE structure');
+ /** @todo use 'coverartmime' where available */
+ $imageinfo = getid3_lib::GetDataImageSize($data);
+ if ($imageinfo === false || !isset($imageinfo['mime'])) {
+ $this->warning('COVERART vorbiscomment tag contains invalid image');
+ continue;
+ }
+
+ $ogg = new self($this->getid3);
+ $ogg->setStringMode($data);
+ $info['ogg']['comments']['picture'][] = array(
+ 'image_mime' => $imageinfo['mime'],
+ 'data' => $ogg->saveAttachment('coverart', 0, strlen($data), $imageinfo['mime']),
+ );
+ unset($ogg);
+
+ } else {
+
+ $info['ogg']['comments'][strtolower($ThisFileInfo_ogg_comments_raw[$i]['key'])][] = $ThisFileInfo_ogg_comments_raw[$i]['value'];
+
+ }
+
+ } else {
+
+ $info['warning'][] = '[known problem with CDex >= v1.40, < v1.50b7] Invalid Ogg comment name/value pair ['.$i.']: '.$commentstring;
+
+ }
+ unset($ThisFileInfo_ogg_comments_raw[$i]);
+ }
+ unset($ThisFileInfo_ogg_comments_raw);
+
+
+ // Replay Gain Adjustment
+ // http://privatewww.essex.ac.uk/~djmrob/replaygain/
+ if (isset($info['ogg']['comments']) && is_array($info['ogg']['comments'])) {
+ foreach ($info['ogg']['comments'] as $index => $commentvalue) {
+ switch ($index) {
+ case 'rg_audiophile':
+ case 'replaygain_album_gain':
+ $info['replay_gain']['album']['adjustment'] = (double) $commentvalue[0];
+ unset($info['ogg']['comments'][$index]);
+ break;
+
+ case 'rg_radio':
+ case 'replaygain_track_gain':
+ $info['replay_gain']['track']['adjustment'] = (double) $commentvalue[0];
+ unset($info['ogg']['comments'][$index]);
+ break;
+
+ case 'replaygain_album_peak':
+ $info['replay_gain']['album']['peak'] = (double) $commentvalue[0];
+ unset($info['ogg']['comments'][$index]);
+ break;
+
+ case 'rg_peak':
+ case 'replaygain_track_peak':
+ $info['replay_gain']['track']['peak'] = (double) $commentvalue[0];
+ unset($info['ogg']['comments'][$index]);
+ break;
+
+ case 'replaygain_reference_loudness':
+ $info['replay_gain']['reference_volume'] = (double) $commentvalue[0];
+ unset($info['ogg']['comments'][$index]);
+ break;
+
+ default:
+ // do nothing
+ break;
+ }
+ }
+ }
+
+ $this->fseek($OriginalOffset);
+
+ return true;
+ }
+
+ public 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);
+ }
+
+
+ public 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 $segmentlength;
+ }
+
+
+ public static function get_quality_from_nominal_bitrate($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
+ }
+
+}