// // available at http://getid3.sourceforge.net /// ///////////////////////////////////////////////////////////////// // // // getid3.ogg.php - part of getID3() // // See getid3.readme.txt for more details // // // ///////////////////////////////////////////////////////////////// function getOggHeaderFilepointer(&$fd, &$ThisFileInfo) { $ThisFileInfo['fileformat'] = 'ogg'; // Warn about illegal tags - only vorbiscomments are allowed if (isset($ThisFileInfo['id3v2'])) { $ThisFileInfo['warning'] .= "\n".'Illegal ID3v2 tag present.'; } if (isset($ThisFileInfo['id3v1'])) { $ThisFileInfo['warning'] .= "\n".'Illegal ID3v1 tag present.'; } if (isset($ThisFileInfo['ape'])) { $ThisFileInfo['warning'] .= "\n".'Illegal APE tag present.'; } // Page 1 - Stream Header fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET); $oggpageinfo = ParseOggPageHeader($fd); $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo; if (ftell($fd) >= FREAD_BUFFER_SIZE) { $ThisFileInfo['error'] .= "\n".'Could not find start of Ogg page in the first '.FREAD_BUFFER_SIZE.' bytes (this might not be an Ogg-Vorbis file?)'; unset($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'; $ThisFileInfo['audio']['bitrate_mode'] = 'vbr'; } elseif (substr($filedata, 1, 6) == 'vorbis') { $ThisFileInfo['audio']['dataformat'] = 'vorbis'; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = 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; $ThisFileInfo['ogg']['bitstreamversion'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['numberofchannels'] = LittleEndian2Int(substr($filedata, $filedataoffset, 1)); $filedataoffset += 1; $ThisFileInfo['audio']['channels'] = $ThisFileInfo['ogg']['numberofchannels']; $ThisFileInfo['ogg']['samplerate'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; if ($ThisFileInfo['ogg']['samplerate'] == 0) { $ThisFileInfo['error'] .= "\n".'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 $ThisFileInfo['ogg']['bitrate_max'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['bitrate_nominal'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['bitrate_min'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['blocksize_small'] = pow(2, LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0x0F); $ThisFileInfo['ogg']['blocksize_large'] = pow(2, (LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0xF0) >> 4); $ThisFileInfo['ogg']['stop_bit'] = LittleEndian2Int(substr($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']); $ThisFileInfo['audio']['bitrate_mode'] = 'abr'; } } elseif (substr($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'; $ThisFileInfo['ogg']['pageheader'][$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'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['header_size'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode_bitstream_version'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['bitrate'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['framesize'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['frames_per_packet'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['extra_headers'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved1'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved2'] = 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']; $ThisFileInfo['speex']['band_type'] = SpeexBandModeLookup($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 { $ThisFileInfo['error'] .= "\n".'Expecting either "Speex " or "vorbis" identifier strings, found neither'; unset($ThisFileInfo['ogg']); unset($ThisFileInfo['mime_type']); return false; } // Page 2 - Comment Header $oggpageinfo = ParseOggPageHeader($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'] = LittleEndian2Int(substr($filedata, 0, 1)); $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, 1, 6); // hard-coded to 'vorbis' ParseVorbisCommentsFilepointer($fd, $ThisFileInfo); break; case 'flac': require_once(GETID3_INCLUDEPATH.'getid3.flac.php'); if (!FLACparseMETAdata($fd, $ThisFileInfo)) { $ThisFileInfo['error'] .= "\n".'Failed to parse FLAC headers'; return false; } break; case 'speex': fseek($fd, $ThisFileInfo['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length'], SEEK_CUR); ParseVorbisCommentsFilepointer($fd, $ThisFileInfo); break; } // Last Page - Number of Samples fseek($fd, max($ThisFileInfo['avdataend'] - FREAD_BUFFER_SIZE, 0), SEEK_SET); $LastChunkOfOgg = strrev(fread($fd, FREAD_BUFFER_SIZE)); if ($LastOggSpostion = strpos($LastChunkOfOgg, 'SggO')) { fseek($fd, 0 - ($LastOggSpostion + strlen('SggO')), SEEK_END); $ThisFileInfo['avdataend'] = ftell($fd); $ThisFileInfo['ogg']['pageheader']['eos'] = ParseOggPageHeader($fd); $ThisFileInfo['ogg']['samples'] = $ThisFileInfo['ogg']['pageheader']['eos']['pcm_abs_position']; if ($ThisFileInfo['ogg']['samples'] == 0) { $ThisFileInfo['error'] .= "\n".'Corrupt Ogg file: eos.number of samples == zero'; return false; } $ThisFileInfo['ogg']['bitrate_average'] = (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / ($ThisFileInfo['ogg']['samples'] / $ThisFileInfo['audio']['sample_rate']); } if (isset($ThisFileInfo['ogg']['bitrate_average']) && ($ThisFileInfo['ogg']['bitrate_average'] > 0)) { $ThisFileInfo['audio']['bitrate'] = $ThisFileInfo['ogg']['bitrate_average']; } elseif (isset($ThisFileInfo['ogg']['bitrate_nominal']) && ($ThisFileInfo['ogg']['bitrate_nominal'] > 0)) { $ThisFileInfo['audio']['bitrate'] = $ThisFileInfo['ogg']['bitrate_nominal']; } elseif (isset($ThisFileInfo['ogg']['bitrate_min']) && isset($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'] .= "\n".'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 /', '', $ThisFileInfo['ogg']['vendor']); } return true; } function ParseOggPageHeader(&$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, FREAD_BUFFER_SIZE); $filedataoffset = 0; while ((substr($filedata, $filedataoffset++, 4) != 'OggS')) { if ((ftell($fd) - $oggheader['page_start_offset']) >= FREAD_BUFFER_SIZE) { // should be found before here return false; } if (strlen($filedata) < 1024) { if (feof($fd) || (($filedata .= fread($fd, FREAD_BUFFER_SIZE)) === false)) { // get some more data, unless eof, in which case fail return false; } } } $filedataoffset += strlen('OggS') - 1; // page, delimited by 'OggS' $oggheader['stream_structver'] = LittleEndian2Int(substr($filedata, $filedataoffset, 1)); $filedataoffset += 1; $oggheader['flags_raw'] = LittleEndian2Int(substr($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) $oggheader['pcm_abs_position'] = LittleEndian2Int(substr($filedata, $filedataoffset, 8)); $filedataoffset += 8; $oggheader['stream_serialno'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $oggheader['page_seqno'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $oggheader['page_checksum'] = LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $oggheader['page_segments'] = LittleEndian2Int(substr($filedata, $filedataoffset, 1)); $filedataoffset += 1; $oggheader['page_length'] = 0; for ($i = 0; $i < $oggheader['page_segments']; $i++) { $oggheader['segment_table'][$i] = 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 $oggheader; } function ParseVorbisCommentsFilepointer(&$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, 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, OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1) + $commentdataoffset); break; default: return false; break; } $VendorSize = LittleEndian2Int(substr($commentdata, $commentdataoffset, 4)); $commentdataoffset += 4; $ThisFileInfo['ogg']['vendor'] = substr($commentdata, $commentdataoffset, $VendorSize); $commentdataoffset += $VendorSize; $CommentsCount = LittleEndian2Int(substr($commentdata, $commentdataoffset, 4)); $commentdataoffset += 4; $ThisFileInfo['avdataoffset'] = $CommentStartOffset + $commentdataoffset; $basicfields = array('TITLE', 'ARTIST', 'ALBUM', 'TRACKNUMBER', 'GENRE', 'DATE', 'DESCRIPTION', 'COMMENT'); for ($i = 0; $i < $CommentsCount; $i++) { $ThisFileInfo['ogg']['comments_raw'][$i]['dataoffset'] = $CommentStartOffset + $commentdataoffset; if (ftell($fd) < ($ThisFileInfo['ogg']['comments_raw'][$i]['dataoffset'] + 4)) { $VorbisCommentPage++; $oggpageinfo = ParseOggPageHeader($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(chr(0), 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, OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1)); } $ThisFileInfo['ogg']['comments_raw'][$i]['size'] = 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)) { $ThisFileInfo['error'] .= "\n".'Invalid Ogg comment size (comment #'.$i.', claims to be '.number_format($ThisFileInfo['ogg']['comments_raw'][$i]['size']).' bytes) - aborting reading comments'; break 2; } $VorbisCommentPage++; $oggpageinfo = ParseOggPageHeader($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(chr(0), 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, OggPageSegmentLength($ThisFileInfo['ogg']['pageheader'][$VorbisCommentPage], 1)); //$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? $ThisFileInfo['warning'] .= "\n".'Blank Ogg comment ['.$i.']'; } elseif (strstr($commentstring, '=')) { $commentexploded = explode('=', $commentstring, 2); $ThisFileInfo['ogg']['comments_raw'][$i]['key'] = strtoupper($commentexploded[0]); $ThisFileInfo['ogg']['comments_raw'][$i]['value'] = ($commentexploded[1] ? utf8_decode($commentexploded[1]) : ''); $ThisFileInfo['ogg']['comments_raw'][$i]['data'] = base64_decode($ThisFileInfo['ogg']['comments_raw'][$i]['value']); $ThisFileInfo['ogg']['comments'][strtolower($ThisFileInfo['ogg']['comments_raw'][$i]['key'])][] = $ThisFileInfo['ogg']['comments_raw'][$i]['value']; require_once(GETID3_INCLUDEPATH.'getid3.getimagesize.php'); $imagechunkcheck = GetDataImageSize($ThisFileInfo['ogg']['comments_raw'][$i]['data']); $ThisFileInfo['ogg']['comments_raw'][$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'][$i]['image_mime']); unset($ThisFileInfo['ogg']['comments_raw'][$i]['data']); } } else { $ThisFileInfo['warning'] .= "\n".'[known problem with CDex >= v1.40, < v1.50b7] Invalid Ogg comment name/value pair ['.$i.']: '.$commentstring; } } // Check for presence of vorbiscomments if (isset($ThisFileInfo['ogg']['comments'])) { $ThisFileInfo['tags'][] = 'vorbiscomment'; // Yank other comments - vorbiscomments has highest preference if (isset($ThisFileInfo['ogg']['comments'])) { CopyFormatCommentsToRootComments($ThisFileInfo['ogg']['comments'], $ThisFileInfo, true, true, true); } } // Replay Gain Adjustment // http://privatewww.essex.ac.uk/~djmrob/replaygain/ if (isset($ThisFileInfo['ogg']['comments']) && is_array($ThisFileInfo['ogg']['comments'])) { foreach ($ThisFileInfo['ogg']['comments'] as $index => $keyvaluepair) { if (isset($keyvaluepair['key'])) { switch ($keyvaluepair['key']) { case 'RG_AUDIOPHILE': case 'REPLAYGAIN_ALBUM_GAIN': $ThisFileInfo['replay_gain']['audiophile']['adjustment'] = (double) $keyvaluepair['value']; break; case 'RG_RADIO': case 'REPLAYGAIN_TRACK_GAIN': $ThisFileInfo['replay_gain']['radio']['adjustment'] = (double) $keyvaluepair['value']; break; case 'REPLAYGAIN_ALBUM_PEAK': $ThisFileInfo['replay_gain']['audiophile']['peak'] = (double) $keyvaluepair['value']; break; case 'RG_PEAK': case 'REPLAYGAIN_TRACK_PEAK': $ThisFileInfo['replay_gain']['radio']['peak'] = (double) $keyvaluepair['value']; break; default: // do nothing break; } } } } fseek($fd, $OriginalOffset, SEEK_SET); return true; } function SpeexBandModeLookup($mode) { static $SpeexBandModeLookup = array(); if (empty($SpeexBandModeLookup)) { $SpeexBandModeLookup[0] = 'narrow'; $SpeexBandModeLookup[1] = 'wide'; $SpeexBandModeLookup[2] = 'ultra-wide'; } return (isset($SpeexBandModeLookup[$mode]) ? $SpeexBandModeLookup[$mode] : null); } 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; } ?>