// // 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 { function getid3_ogg(&$fd, &$ThisFileInfo) { $ThisFileInfo['fileformat'] = 'ogg'; // Warn about illegal tags - only vorbiscomments are allowed if (isset($ThisFileInfo['id3v2'])) { $ThisFileInfo['warning'][] = 'Illegal ID3v2 tag present.'; } if (isset($ThisFileInfo['id3v1'])) { $ThisFileInfo['warning'][] = 'Illegal ID3v1 tag present.'; } if (isset($ThisFileInfo['ape'])) { $ThisFileInfo['warning'][] = 'Illegal APE tag present.'; } // Page 1 - Stream Header fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET); $oggpageinfo = getid3_ogg::ParseOggPageHeader($fd); $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo; if (ftell($fd) >= GETID3_FREAD_BUFFER_SIZE) { $ThisFileInfo['error'][] = 'Could not find start of Ogg page in the first '.GETID3_FREAD_BUFFER_SIZE.' bytes (this might not be an Ogg-Vorbis file?)'; unset($ThisFileInfo['fileformat']); unset($ThisFileInfo['ogg']); return false; } $filedata = fread($fd, $oggpageinfo['page_length']); $filedataoffset = 0; if (substr($filedata, 0, 4) == 'fLaC') { $ThisFileInfo['audio']['dataformat'] = 'flac'; $ThisFileInfo['audio']['bitrate_mode'] = 'vbr'; $ThisFileInfo['audio']['lossless'] = true; } elseif (substr($filedata, 1, 6) == 'vorbis') { $this->ParseVorbisPageHeader($filedata, $filedataoffset, $ThisFileInfo, $oggpageinfo); } elseif (substr($filedata, 0, 8) == 'Speex ') { // http://www.speex.org/manual/node10.html $ThisFileInfo['audio']['dataformat'] = 'speex'; $ThisFileInfo['mime_type'] = 'audio/speex'; $ThisFileInfo['audio']['bitrate_mode'] = 'abr'; $ThisFileInfo['audio']['lossless'] = false; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_string'] = substr($filedata, $filedataoffset, 8); // hard-coded to 'Speex ' $filedataoffset += 8; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version'] = substr($filedata, $filedataoffset, 20); $filedataoffset += 20; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version_id'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['header_size'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode_bitstream_version'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['bitrate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['framesize'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['frames_per_packet'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['extra_headers'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved1'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved2'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['speex']['speex_version'] = trim($ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version']); $ThisFileInfo['speex']['sample_rate'] = $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate']; $ThisFileInfo['speex']['channels'] = $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels']; $ThisFileInfo['speex']['vbr'] = (bool) $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr']; $ThisFileInfo['speex']['band_type'] = getid3_ogg::SpeexBandModeLookup($ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode']); $ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['speex']['sample_rate']; $ThisFileInfo['audio']['channels'] = $ThisFileInfo['speex']['channels']; if ($ThisFileInfo['speex']['vbr']) { $ThisFileInfo['audio']['bitrate_mode'] = 'vbr'; } } else { $ThisFileInfo['error'][] = 'Expecting either "Speex " or "vorbis" identifier strings, found neither'; unset($ThisFileInfo['ogg']); unset($ThisFileInfo['mime_type']); return false; } // Page 2 - Comment Header $oggpageinfo = getid3_ogg::ParseOggPageHeader($fd); $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo; switch ($ThisFileInfo['audio']['dataformat']) { case 'vorbis': $filedata = fread($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']); $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($filedata, 0, 1)); $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, 1, 6); // hard-coded to 'vorbis' getid3_ogg::ParseVorbisCommentsFilepointer($fd, $ThisFileInfo); break; case 'flac': if (!getid3_flac::FLACparseMETAdata($fd, $ThisFileInfo)) { $ThisFileInfo['error'][] = 'Failed to parse FLAC headers'; return false; } break; case 'speex': fseek($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length'], SEEK_CUR); getid3_ogg::ParseVorbisCommentsFilepointer($fd, $ThisFileInfo); break; } // Last Page - Number of Samples if (!getid3_lib::intValueSupported($ThisFileInfo['avdataend'])) { $ThisFileInfo['warning'][] = 'Unable to parse Ogg end chunk file (PHP does not support file operations beyond '.round(PHP_INT_MAX / 1073741824).'GB)'; } else { fseek($fd, max($ThisFileInfo['avdataend'] - GETID3_FREAD_BUFFER_SIZE, 0), SEEK_SET); $LastChunkOfOgg = strrev(fread($fd, GETID3_FREAD_BUFFER_SIZE)); if ($LastOggSpostion = strpos($LastChunkOfOgg, 'SggO')) { fseek($fd, $ThisFileInfo['avdataend'] - ($LastOggSpostion + strlen('SggO')), SEEK_SET); $ThisFileInfo['avdataend'] = ftell($fd); $ThisFileInfo['ogg']['pageheader']['eos'] = getid3_ogg::ParseOggPageHeader($fd); $ThisFileInfo['ogg']['samples'] = $ThisFileInfo['ogg']['pageheader']['eos']['pcm_abs_position']; if ($ThisFileInfo['ogg']['samples'] == 0) { $ThisFileInfo['error'][] = 'Corrupt Ogg file: eos.number of samples == zero'; return false; } $ThisFileInfo['ogg']['bitrate_average'] = (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / ($ThisFileInfo['ogg']['samples'] / $ThisFileInfo['audio']['sample_rate']); } } if (!empty($ThisFileInfo['ogg']['bitrate_average'])) { $ThisFileInfo['audio']['bitrate'] = $ThisFileInfo['ogg']['bitrate_average']; } elseif (!empty($ThisFileInfo['ogg']['bitrate_nominal'])) { $ThisFileInfo['audio']['bitrate'] = $ThisFileInfo['ogg']['bitrate_nominal']; } elseif (!empty($ThisFileInfo['ogg']['bitrate_min']) && !empty($ThisFileInfo['ogg']['bitrate_max'])) { $ThisFileInfo['audio']['bitrate'] = ($ThisFileInfo['ogg']['bitrate_min'] + $ThisFileInfo['ogg']['bitrate_max']) / 2; } if (isset($ThisFileInfo['audio']['bitrate']) && !isset($ThisFileInfo['playtime_seconds'])) { if ($ThisFileInfo['audio']['bitrate'] == 0) { $ThisFileInfo['error'][] = 'Corrupt Ogg file: bitrate_audio == zero'; return false; } $ThisFileInfo['playtime_seconds'] = (float) ((($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / $ThisFileInfo['audio']['bitrate']); } if (isset($ThisFileInfo['ogg']['vendor'])) { $ThisFileInfo['audio']['encoder'] = preg_replace('/^Encoded with /', '', $ThisFileInfo['ogg']['vendor']); // Vorbis only if ($ThisFileInfo['audio']['dataformat'] == 'vorbis') { // Vorbis 1.0 starts with Xiph.Org if (preg_match('/^Xiph.Org/', $ThisFileInfo['audio']['encoder'])) { if ($ThisFileInfo['audio']['bitrate_mode'] == 'abr') { // Set -b 128 on abr files $ThisFileInfo['audio']['encoder_options'] = '-b '.round($ThisFileInfo['ogg']['bitrate_nominal'] / 1000); } elseif (($ThisFileInfo['audio']['bitrate_mode'] == 'vbr') && ($ThisFileInfo['audio']['channels'] == 2) && ($ThisFileInfo['audio']['sample_rate'] >= 44100) && ($ThisFileInfo['audio']['sample_rate'] <= 48000)) { // Set -q N on vbr files $ThisFileInfo['audio']['encoder_options'] = '-q '.$this->get_quality_from_nominal_bitrate($ThisFileInfo['ogg']['bitrate_nominal']); } } if (empty($ThisFileInfo['audio']['encoder_options']) && !empty($ThisFileInfo['ogg']['bitrate_nominal'])) { $ThisFileInfo['audio']['encoder_options'] = 'Nominal bitrate: '.intval(round($ThisFileInfo['ogg']['bitrate_nominal'] / 1000)).'kbps'; } } } return true; } static function ParseVorbisPageHeader(&$filedata, &$filedataoffset, &$ThisFileInfo, &$oggpageinfo) { $ThisFileInfo['audio']['dataformat'] = 'vorbis'; $ThisFileInfo['audio']['lossless'] = false; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); $filedataoffset += 1; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, $filedataoffset, 6); // hard-coded to 'vorbis' $filedataoffset += 6; $ThisFileInfo['ogg']['bitstreamversion'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['numberofchannels'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); $filedataoffset += 1; $ThisFileInfo['audio']['channels'] = $ThisFileInfo['ogg']['numberofchannels']; $ThisFileInfo['ogg']['samplerate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; if ($ThisFileInfo['ogg']['samplerate'] == 0) { $ThisFileInfo['error'][] = 'Corrupt Ogg file: sample rate == zero'; return false; } $ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['ogg']['samplerate']; $ThisFileInfo['ogg']['samples'] = 0; // filled in later $ThisFileInfo['ogg']['bitrate_average'] = 0; // filled in later $ThisFileInfo['ogg']['bitrate_max'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['bitrate_nominal'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['bitrate_min'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['blocksize_small'] = pow(2, getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0x0F); $ThisFileInfo['ogg']['blocksize_large'] = pow(2, (getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0xF0) >> 4); $ThisFileInfo['ogg']['stop_bit'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); // must be 1, marks end of packet $ThisFileInfo['audio']['bitrate_mode'] = 'vbr'; // overridden if actually abr if ($ThisFileInfo['ogg']['bitrate_max'] == 0xFFFFFFFF) { unset($ThisFileInfo['ogg']['bitrate_max']); $ThisFileInfo['audio']['bitrate_mode'] = 'abr'; } if ($ThisFileInfo['ogg']['bitrate_nominal'] == 0xFFFFFFFF) { unset($ThisFileInfo['ogg']['bitrate_nominal']); } if ($ThisFileInfo['ogg']['bitrate_min'] == 0xFFFFFFFF) { unset($ThisFileInfo['ogg']['bitrate_min']); $ThisFileInfo['audio']['bitrate_mode'] = 'abr'; } return true; } static function ParseOggPageHeader(&$fd) { // http://xiph.org/ogg/vorbis/doc/framing.html $oggheader['page_start_offset'] = ftell($fd); // where we started from in the file $filedata = fread($fd, GETID3_FREAD_BUFFER_SIZE); $filedataoffset = 0; while ((substr($filedata, $filedataoffset++, 4) != 'OggS')) { if ((ftell($fd) - $oggheader['page_start_offset']) >= GETID3_FREAD_BUFFER_SIZE) { // should be found before here return false; } if ((($filedataoffset + 28) > strlen($filedata)) || (strlen($filedata) < 28)) { if (feof($fd) || (($filedata .= fread($fd, 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'] + $oggheader['page_length']; fseek($fd, $oggheader['header_end_offset'], SEEK_SET); return $oggheader; } static function ParseVorbisCommentsFilepointer(&$fd, &$ThisFileInfo) { $OriginalOffset = ftell($fd); $CommentStartOffset = $OriginalOffset; $commentdataoffset = 0; $VorbisCommentPage = 1; switch ($ThisFileInfo['audio']['dataformat']) { case 'vorbis': $CommentStartOffset = $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_start_offset']; // Second Ogg page, after header block fseek($fd, $CommentStartOffset, SEEK_SET); $commentdataoffset = 27 + $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_segments']; $commentdata = fread($fd, getid3_ogg::OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1) + $commentdataoffset); $commentdataoffset += (strlen('vorbis') + 1); break; case 'flac': fseek($fd, $ThisFileInfo['flac']['VORBIS_COMMENT']['raw']['offset'] + 4, SEEK_SET); $commentdata = fread($fd, $ThisFileInfo['flac']['VORBIS_COMMENT']['raw']['block_length']); break; case 'speex': $CommentStartOffset = $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_start_offset']; // Second Ogg page, after header block fseek($fd, $CommentStartOffset, SEEK_SET); $commentdataoffset = 27 + $ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage]['page_segments']; $commentdata = fread($fd, getid3_ogg::OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1) + $commentdataoffset); break; default: return false; break; } $VendorSize = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4)); $commentdataoffset += 4; $ThisFileInfo['ogg']['vendor'] = substr($commentdata, $commentdataoffset, $VendorSize); $commentdataoffset += $VendorSize; $CommentsCount = getid3_lib::LittleEndian2Int(substr($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 } } ?>