diff options
Diffstat (limited to 'extensions/TimedMediaHandler/libs/getid3/module.audio.ogg.php')
| -rw-r--r-- | extensions/TimedMediaHandler/libs/getid3/module.audio.ogg.php | 671 |
1 files changed, 671 insertions, 0 deletions
diff --git a/extensions/TimedMediaHandler/libs/getid3/module.audio.ogg.php b/extensions/TimedMediaHandler/libs/getid3/module.audio.ogg.php new file mode 100644 index 00000000..a2a35aad --- /dev/null +++ b/extensions/TimedMediaHandler/libs/getid3/module.audio.ogg.php @@ -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 + } + +} |