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- <?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.flac.php //
- // module for analyzing FLAC and OggFLAC audio files //
- // dependencies: module.audio.ogg.php //
- // ///
- /////////////////////////////////////////////////////////////////
- getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.ogg.php', __FILE__, true);
- class getid3_flac
- {
- function getid3_flac(&$fd, &$ThisFileInfo) {
- // http://flac.sourceforge.net/format.html
- fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
- $StreamMarker = fread($fd, 4);
- if ($StreamMarker != 'fLaC') {
- $ThisFileInfo['error'][] = 'Expecting "fLaC" at offset '.$ThisFileInfo['avdataoffset'].', found "'.$StreamMarker.'"';
- return false;
- }
- $ThisFileInfo['fileformat'] = 'flac';
- $ThisFileInfo['audio']['dataformat'] = 'flac';
- $ThisFileInfo['audio']['bitrate_mode'] = 'vbr';
- $ThisFileInfo['audio']['lossless'] = true;
- return getid3_flac::FLACparseMETAdata($fd, $ThisFileInfo);
- }
- function FLACparseMETAdata(&$fd, &$ThisFileInfo) {
- do {
- $METAdataBlockOffset = ftell($fd);
- $METAdataBlockHeader = fread($fd, 4);
- $METAdataLastBlockFlag = (bool) (getid3_lib::BigEndian2Int(substr($METAdataBlockHeader, 0, 1)) & 0x80);
- $METAdataBlockType = getid3_lib::BigEndian2Int(substr($METAdataBlockHeader, 0, 1)) & 0x7F;
- $METAdataBlockLength = getid3_lib::BigEndian2Int(substr($METAdataBlockHeader, 1, 3));
- $METAdataBlockTypeText = getid3_flac::FLACmetaBlockTypeLookup($METAdataBlockType);
- if ($METAdataBlockLength < 0) {
- $ThisFileInfo['error'][] = 'corrupt or invalid METADATA_BLOCK_HEADER.BLOCK_TYPE ('.$METAdataBlockType.') at offset '.$METAdataBlockOffset;
- break;
- }
- $ThisFileInfo['flac'][$METAdataBlockTypeText]['raw'] = array();
- $ThisFileInfo_flac_METAdataBlockTypeText_raw = &$ThisFileInfo['flac'][$METAdataBlockTypeText]['raw'];
- $ThisFileInfo_flac_METAdataBlockTypeText_raw['offset'] = $METAdataBlockOffset;
- $ThisFileInfo_flac_METAdataBlockTypeText_raw['last_meta_block'] = $METAdataLastBlockFlag;
- $ThisFileInfo_flac_METAdataBlockTypeText_raw['block_type'] = $METAdataBlockType;
- $ThisFileInfo_flac_METAdataBlockTypeText_raw['block_type_text'] = $METAdataBlockTypeText;
- $ThisFileInfo_flac_METAdataBlockTypeText_raw['block_length'] = $METAdataBlockLength;
- $ThisFileInfo_flac_METAdataBlockTypeText_raw['block_data'] = @fread($fd, $METAdataBlockLength);
- $ThisFileInfo['avdataoffset'] = ftell($fd);
- switch ($METAdataBlockTypeText) {
- case 'STREAMINFO':
- if (!getid3_flac::FLACparseSTREAMINFO($ThisFileInfo_flac_METAdataBlockTypeText_raw['block_data'], $ThisFileInfo)) {
- return false;
- }
- break;
- case 'PADDING':
- // ignore
- break;
- case 'APPLICATION':
- if (!getid3_flac::FLACparseAPPLICATION($ThisFileInfo_flac_METAdataBlockTypeText_raw['block_data'], $ThisFileInfo)) {
- return false;
- }
- break;
- case 'SEEKTABLE':
- if (!getid3_flac::FLACparseSEEKTABLE($ThisFileInfo_flac_METAdataBlockTypeText_raw['block_data'], $ThisFileInfo)) {
- return false;
- }
- break;
- case 'VORBIS_COMMENT':
- $OldOffset = ftell($fd);
- fseek($fd, 0 - $METAdataBlockLength, SEEK_CUR);
- getid3_ogg::ParseVorbisCommentsFilepointer($fd, $ThisFileInfo);
- fseek($fd, $OldOffset, SEEK_SET);
- break;
- case 'CUESHEET':
- if (!getid3_flac::FLACparseCUESHEET($ThisFileInfo_flac_METAdataBlockTypeText_raw['block_data'], $ThisFileInfo)) {
- return false;
- }
- break;
- case 'PICTURE':
- if (!$this->FLACparsePICTURE($ThisFileInfo_flac_METAdataBlockTypeText_raw['block_data'], $ThisFileInfo)) {
- return false;
- }
- break;
- default:
- $ThisFileInfo['warning'][] = 'Unhandled METADATA_BLOCK_HEADER.BLOCK_TYPE ('.$METAdataBlockType.') at offset '.$METAdataBlockOffset;
- break;
- }
- } while ($METAdataLastBlockFlag === false);
- if (isset($ThisFileInfo['flac']['STREAMINFO'])) {
- $ThisFileInfo['flac']['compressed_audio_bytes'] = $ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset'];
- $ThisFileInfo['flac']['uncompressed_audio_bytes'] = $ThisFileInfo['flac']['STREAMINFO']['samples_stream'] * $ThisFileInfo['flac']['STREAMINFO']['channels'] * ($ThisFileInfo['flac']['STREAMINFO']['bits_per_sample'] / 8);
- if ($ThisFileInfo['flac']['uncompressed_audio_bytes'] == 0) {
- $ThisFileInfo['error'][] = 'Corrupt FLAC file: uncompressed_audio_bytes == zero';
- return false;
- }
- $ThisFileInfo['flac']['compression_ratio'] = $ThisFileInfo['flac']['compressed_audio_bytes'] / $ThisFileInfo['flac']['uncompressed_audio_bytes'];
- }
- // set md5_data_source - built into flac 0.5+
- if (isset($ThisFileInfo['flac']['STREAMINFO']['audio_signature'])) {
- if ($ThisFileInfo['flac']['STREAMINFO']['audio_signature'] === str_repeat("\x00", 16)) {
- $ThisFileInfo['warning'][] = 'FLAC STREAMINFO.audio_signature is null (known issue with libOggFLAC)';
- } else {
- $ThisFileInfo['md5_data_source'] = '';
- $md5 = $ThisFileInfo['flac']['STREAMINFO']['audio_signature'];
- for ($i = 0; $i < strlen($md5); $i++) {
- $ThisFileInfo['md5_data_source'] .= str_pad(dechex(ord($md5{$i})), 2, '00', STR_PAD_LEFT);
- }
- if (!preg_match('/^[0-9a-f]{32}$/', $ThisFileInfo['md5_data_source'])) {
- unset($ThisFileInfo['md5_data_source']);
- }
- }
- }
- $ThisFileInfo['audio']['bits_per_sample'] = $ThisFileInfo['flac']['STREAMINFO']['bits_per_sample'];
- if ($ThisFileInfo['audio']['bits_per_sample'] == 8) {
- // special case
- // must invert sign bit on all data bytes before MD5'ing to match FLAC's calculated value
- // MD5sum calculates on unsigned bytes, but FLAC calculated MD5 on 8-bit audio data as signed
- $ThisFileInfo['warning'][] = 'FLAC calculates MD5 data strangely on 8-bit audio, so the stored md5_data_source value will not match the decoded WAV file';
- }
- if (!empty($ThisFileInfo['ogg']['vendor'])) {
- $ThisFileInfo['audio']['encoder'] = $ThisFileInfo['ogg']['vendor'];
- }
- return true;
- }
- function FLACmetaBlockTypeLookup($blocktype) {
- static $FLACmetaBlockTypeLookup = array();
- if (empty($FLACmetaBlockTypeLookup)) {
- $FLACmetaBlockTypeLookup[0] = 'STREAMINFO';
- $FLACmetaBlockTypeLookup[1] = 'PADDING';
- $FLACmetaBlockTypeLookup[2] = 'APPLICATION';
- $FLACmetaBlockTypeLookup[3] = 'SEEKTABLE';
- $FLACmetaBlockTypeLookup[4] = 'VORBIS_COMMENT';
- $FLACmetaBlockTypeLookup[5] = 'CUESHEET';
- $FLACmetaBlockTypeLookup[6] = 'PICTURE';
- }
- return (isset($FLACmetaBlockTypeLookup[$blocktype]) ? $FLACmetaBlockTypeLookup[$blocktype] : 'reserved');
- }
- function FLACapplicationIDLookup($applicationid) {
- static $FLACapplicationIDLookup = array();
- if (empty($FLACapplicationIDLookup)) {
- // http://flac.sourceforge.net/id.html
- $FLACapplicationIDLookup[0x46746F6C] = 'flac-tools'; // 'Ftol'
- $FLACapplicationIDLookup[0x46746F6C] = 'Sound Font FLAC'; // 'SFFL'
- }
- return (isset($FLACapplicationIDLookup[$applicationid]) ? $FLACapplicationIDLookup[$applicationid] : 'reserved');
- }
- function FLACpictureTypeLookup($type_id) {
- static $lookup = array (
- 0 => 'Other',
- 1 => '32x32 pixels \'file icon\' (PNG only)',
- 2 => 'Other file icon',
- 3 => 'Cover (front)',
- 4 => 'Cover (back)',
- 5 => 'Leaflet page',
- 6 => 'Media (e.g. label side of CD)',
- 7 => 'Lead artist/lead performer/soloist',
- 8 => 'Artist/performer',
- 9 => 'Conductor',
- 10 => 'Band/Orchestra',
- 11 => 'Composer',
- 12 => 'Lyricist/text writer',
- 13 => 'Recording Location',
- 14 => 'During recording',
- 15 => 'During performance',
- 16 => 'Movie/video screen capture',
- 17 => 'A bright coloured fish',
- 18 => 'Illustration',
- 19 => 'Band/artist logotype',
- 20 => 'Publisher/Studio logotype',
- );
- return (isset($lookup[$type_id]) ? $lookup[$type_id] : 'reserved');
- }
- function FLACparseSTREAMINFO($METAdataBlockData, &$ThisFileInfo) {
- $offset = 0;
- $ThisFileInfo['flac']['STREAMINFO']['min_block_size'] = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 2));
- $offset += 2;
- $ThisFileInfo['flac']['STREAMINFO']['max_block_size'] = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 2));
- $offset += 2;
- $ThisFileInfo['flac']['STREAMINFO']['min_frame_size'] = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 3));
- $offset += 3;
- $ThisFileInfo['flac']['STREAMINFO']['max_frame_size'] = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 3));
- $offset += 3;
- $SampleRateChannelsSampleBitsStreamSamples = getid3_lib::BigEndian2Bin(substr($METAdataBlockData, $offset, 8));
- $ThisFileInfo['flac']['STREAMINFO']['sample_rate'] = getid3_lib::Bin2Dec(substr($SampleRateChannelsSampleBitsStreamSamples, 0, 20));
- $ThisFileInfo['flac']['STREAMINFO']['channels'] = getid3_lib::Bin2Dec(substr($SampleRateChannelsSampleBitsStreamSamples, 20, 3)) + 1;
- $ThisFileInfo['flac']['STREAMINFO']['bits_per_sample'] = getid3_lib::Bin2Dec(substr($SampleRateChannelsSampleBitsStreamSamples, 23, 5)) + 1;
- $ThisFileInfo['flac']['STREAMINFO']['samples_stream'] = getid3_lib::Bin2Dec(substr($SampleRateChannelsSampleBitsStreamSamples, 28, 36));
- $offset += 8;
- $ThisFileInfo['flac']['STREAMINFO']['audio_signature'] = substr($METAdataBlockData, $offset, 16);
- $offset += 16;
- if (!empty($ThisFileInfo['flac']['STREAMINFO']['sample_rate'])) {
- $ThisFileInfo['audio']['bitrate_mode'] = 'vbr';
- $ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['flac']['STREAMINFO']['sample_rate'];
- $ThisFileInfo['audio']['channels'] = $ThisFileInfo['flac']['STREAMINFO']['channels'];
- $ThisFileInfo['audio']['bits_per_sample'] = $ThisFileInfo['flac']['STREAMINFO']['bits_per_sample'];
- $ThisFileInfo['playtime_seconds'] = $ThisFileInfo['flac']['STREAMINFO']['samples_stream'] / $ThisFileInfo['flac']['STREAMINFO']['sample_rate'];
- $ThisFileInfo['audio']['bitrate'] = (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / $ThisFileInfo['playtime_seconds'];
- } else {
- $ThisFileInfo['error'][] = 'Corrupt METAdata block: STREAMINFO';
- return false;
- }
- unset($ThisFileInfo['flac']['STREAMINFO']['raw']);
- return true;
- }
- function FLACparseAPPLICATION($METAdataBlockData, &$ThisFileInfo) {
- $offset = 0;
- $ApplicationID = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 4));
- $offset += 4;
- $ThisFileInfo['flac']['APPLICATION'][$ApplicationID]['name'] = getid3_flac::FLACapplicationIDLookup($ApplicationID);
- $ThisFileInfo['flac']['APPLICATION'][$ApplicationID]['data'] = substr($METAdataBlockData, $offset);
- $offset = $METAdataBlockLength;
- unset($ThisFileInfo['flac']['APPLICATION']['raw']);
- return true;
- }
- function FLACparseSEEKTABLE($METAdataBlockData, &$ThisFileInfo) {
- $offset = 0;
- $METAdataBlockLength = strlen($METAdataBlockData);
- $placeholderpattern = str_repeat("\xFF", 8);
- while ($offset < $METAdataBlockLength) {
- $SampleNumberString = substr($METAdataBlockData, $offset, 8);
- $offset += 8;
- if ($SampleNumberString == $placeholderpattern) {
- // placeholder point
- @$ThisFileInfo['flac']['SEEKTABLE']['placeholders']++;
- $offset += 10;
- } else {
- $SampleNumber = getid3_lib::BigEndian2Int($SampleNumberString);
- $ThisFileInfo['flac']['SEEKTABLE'][$SampleNumber]['offset'] = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 8));
- $offset += 8;
- $ThisFileInfo['flac']['SEEKTABLE'][$SampleNumber]['samples'] = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 2));
- $offset += 2;
- }
- }
- unset($ThisFileInfo['flac']['SEEKTABLE']['raw']);
- return true;
- }
- function FLACparseCUESHEET($METAdataBlockData, &$ThisFileInfo) {
- $offset = 0;
- $ThisFileInfo['flac']['CUESHEET']['media_catalog_number'] = trim(substr($METAdataBlockData, $offset, 128), "\0");
- $offset += 128;
- $ThisFileInfo['flac']['CUESHEET']['lead_in_samples'] = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 8));
- $offset += 8;
- $ThisFileInfo['flac']['CUESHEET']['flags']['is_cd'] = (bool) (getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 1)) & 0x80);
- $offset += 1;
- $offset += 258; // reserved
- $ThisFileInfo['flac']['CUESHEET']['number_tracks'] = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 1));
- $offset += 1;
- for ($track = 0; $track < $ThisFileInfo['flac']['CUESHEET']['number_tracks']; $track++) {
- $TrackSampleOffset = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 8));
- $offset += 8;
- $TrackNumber = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 1));
- $offset += 1;
- $ThisFileInfo['flac']['CUESHEET']['tracks'][$TrackNumber]['sample_offset'] = $TrackSampleOffset;
- $ThisFileInfo['flac']['CUESHEET']['tracks'][$TrackNumber]['isrc'] = substr($METAdataBlockData, $offset, 12);
- $offset += 12;
- $TrackFlagsRaw = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 1));
- $offset += 1;
- $ThisFileInfo['flac']['CUESHEET']['tracks'][$TrackNumber]['flags']['is_audio'] = (bool) ($TrackFlagsRaw & 0x80);
- $ThisFileInfo['flac']['CUESHEET']['tracks'][$TrackNumber]['flags']['pre_emphasis'] = (bool) ($TrackFlagsRaw & 0x40);
- $offset += 13; // reserved
- $ThisFileInfo['flac']['CUESHEET']['tracks'][$TrackNumber]['index_points'] = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 1));
- $offset += 1;
- for ($index = 0; $index < $ThisFileInfo['flac']['CUESHEET']['tracks'][$TrackNumber]['index_points']; $index++) {
- $IndexSampleOffset = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 8));
- $offset += 8;
- $IndexNumber = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 1));
- $offset += 1;
- $offset += 3; // reserved
- $ThisFileInfo['flac']['CUESHEET']['tracks'][$TrackNumber]['indexes'][$IndexNumber] = $IndexSampleOffset;
- }
- }
- unset($ThisFileInfo['flac']['CUESHEET']['raw']);
- return true;
- }
- function FLACparsePICTURE($meta_data_block_data, &$ThisFileInfo) {
- $picture = &$ThisFileInfo['flac']['PICTURE'][sizeof($ThisFileInfo['flac']['PICTURE']) - 1];
- $offset = 0;
- $picture['type'] = $this->FLACpictureTypeLookup(getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4)));
- $offset += 4;
- $length = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4));
- $offset += 4;
- $picture['mime_type'] = substr($meta_data_block_data, $offset, $length);
- $offset += $length;
- $length = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4));
- $offset += 4;
- $picture['description'] = substr($meta_data_block_data, $offset, $length);
- $offset += $length;
- $picture['width'] = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4));
- $offset += 4;
- $picture['height'] = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4));
- $offset += 4;
- $picture['color_depth'] = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4));
- $offset += 4;
- $picture['colors_indexed'] = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4));
- $offset += 4;
- $length = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4));
- $offset += 4;
- $picture['image_data'] = substr($meta_data_block_data, $offset, $length);
- $offset += $length;
- unset($ThisFileInfo['flac']['PICTURE']['raw']);
- return true;
- }
- }
- ?>
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