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Diffstat (limited to 'getid3/module.audio.ogg.php')
| -rw-r--r-- | getid3/module.audio.ogg.php | 556 |
1 files changed, 0 insertions, 556 deletions
diff --git a/getid3/module.audio.ogg.php b/getid3/module.audio.ogg.php deleted file mode 100644 index 1cc6366..0000000 --- a/getid3/module.audio.ogg.php +++ /dev/null @@ -1,556 +0,0 @@ -<?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 -{ - - 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, $ThisFileInfo); - break; - - } - - - - // Last Page - Number of Samples - - if ($ThisFileInfo['avdataend'] >= pow(2, 31)) { - - $ThisFileInfo['warning'][] = 'Unable to parse Ogg end chunk file (PHP does not support file operations beyond 2GB)'; - - } else { - - fseek($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; - } - - 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']); - $ThisFileInfo['audio']['bitrate_mode'] = 'abr'; - } - return true; - } - - function ParseOggPageHeader(&$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 $oggheader; - } - - - function ParseVorbisCommentsFilepointer(&$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; - - $basicfields = array('TITLE', 'ARTIST', 'ALBUM', 'TRACKNUMBER', 'GENRE', 'DATE', 'DESCRIPTION', 'COMMENT'); - for ($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)) { - $ThisFileInfo['error'][] = 'Invalid Ogg comment size (comment #'.$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']); - $commentdata .= fread($fd, getid3_ogg::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? - $ThisFileInfo['warning'][] = 'Blank Ogg comment ['.$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]; - $ThisFileInfo['ogg']['comments_raw'][$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']; - - $imageinfo = array(); - $imagechunkcheck = getid3_lib::GetDataImageSize($ThisFileInfo['ogg']['comments_raw'][$i]['data'], $imageinfo); - $ThisFileInfo['ogg']['comments_raw'][$i]['image_mime'] = getid3_lib::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 { - - $ThisFileInfo['warning'][] = '[known problem with CDex >= v1.40, < v1.50b7] Invalid Ogg comment name/value pair ['.$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, $OriginalOffset, SEEK_SET); - - return true; - } - - function SpeexBandModeLookup($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 $segmentlength; - } - - - function get_quality_from_nominal_bitrate($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 - } - -} - -?>
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