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1 <?php 2 ///////////////////////////////////////////////////////////////// 3 /// getID3() by James Heinrich <info@getid3.org> // 4 // available at http://getid3.sourceforge.net // 5 // or http://www.getid3.org // 6 ///////////////////////////////////////////////////////////////// 7 // See readme.txt for more details // 8 ///////////////////////////////////////////////////////////////// 9 // // 10 // module.audio.flac.php // 11 // module for analyzing FLAC and OggFLAC audio files // 12 // dependencies: module.audio.ogg.php // 13 // /// 14 ///////////////////////////////////////////////////////////////// 15 16 17 getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.ogg.php', __FILE__, true); 18 19 /** 20 * @tutorial http://flac.sourceforge.net/format.html 21 */ 22 class getid3_flac extends getid3_handler 23 { 24 const syncword = 'fLaC'; 25 26 public function Analyze() { 27 $info = &$this->getid3->info; 28 29 $this->fseek($info['avdataoffset']); 30 $StreamMarker = $this->fread(4); 31 if ($StreamMarker != self::syncword) { 32 return $this->error('Expecting "'.getid3_lib::PrintHexBytes(self::syncword).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($StreamMarker).'"'); 33 } 34 $info['fileformat'] = 'flac'; 35 $info['audio']['dataformat'] = 'flac'; 36 $info['audio']['bitrate_mode'] = 'vbr'; 37 $info['audio']['lossless'] = true; 38 39 // parse flac container 40 return $this->parseMETAdata(); 41 } 42 43 public function parseMETAdata() { 44 $info = &$this->getid3->info; 45 do { 46 $BlockOffset = $this->ftell(); 47 $BlockHeader = $this->fread(4); 48 $LBFBT = getid3_lib::BigEndian2Int(substr($BlockHeader, 0, 1)); 49 $LastBlockFlag = (bool) ($LBFBT & 0x80); 50 $BlockType = ($LBFBT & 0x7F); 51 $BlockLength = getid3_lib::BigEndian2Int(substr($BlockHeader, 1, 3)); 52 $BlockTypeText = self::metaBlockTypeLookup($BlockType); 53 54 if (($BlockOffset + 4 + $BlockLength) > $info['avdataend']) { 55 $this->error('METADATA_BLOCK_HEADER.BLOCK_TYPE ('.$BlockTypeText.') at offset '.$BlockOffset.' extends beyond end of file'); 56 break; 57 } 58 if ($BlockLength < 1) { 59 $this->error('METADATA_BLOCK_HEADER.BLOCK_LENGTH ('.$BlockLength.') at offset '.$BlockOffset.' is invalid'); 60 break; 61 } 62 63 $info['flac'][$BlockTypeText]['raw'] = array(); 64 $BlockTypeText_raw = &$info['flac'][$BlockTypeText]['raw']; 65 66 $BlockTypeText_raw['offset'] = $BlockOffset; 67 $BlockTypeText_raw['last_meta_block'] = $LastBlockFlag; 68 $BlockTypeText_raw['block_type'] = $BlockType; 69 $BlockTypeText_raw['block_type_text'] = $BlockTypeText; 70 $BlockTypeText_raw['block_length'] = $BlockLength; 71 if ($BlockTypeText_raw['block_type'] != 0x06) { // do not read attachment data automatically 72 $BlockTypeText_raw['block_data'] = $this->fread($BlockLength); 73 } 74 75 switch ($BlockTypeText) { 76 case 'STREAMINFO': // 0x00 77 if (!$this->parseSTREAMINFO($BlockTypeText_raw['block_data'])) { 78 return false; 79 } 80 break; 81 82 case 'PADDING': // 0x01 83 unset($info['flac']['PADDING']); // ignore 84 break; 85 86 case 'APPLICATION': // 0x02 87 if (!$this->parseAPPLICATION($BlockTypeText_raw['block_data'])) { 88 return false; 89 } 90 break; 91 92 case 'SEEKTABLE': // 0x03 93 if (!$this->parseSEEKTABLE($BlockTypeText_raw['block_data'])) { 94 return false; 95 } 96 break; 97 98 case 'VORBIS_COMMENT': // 0x04 99 if (!$this->parseVORBIS_COMMENT($BlockTypeText_raw['block_data'])) { 100 return false; 101 } 102 break; 103 104 case 'CUESHEET': // 0x05 105 if (!$this->parseCUESHEET($BlockTypeText_raw['block_data'])) { 106 return false; 107 } 108 break; 109 110 case 'PICTURE': // 0x06 111 if (!$this->parsePICTURE()) { 112 return false; 113 } 114 break; 115 116 default: 117 $this->warning('Unhandled METADATA_BLOCK_HEADER.BLOCK_TYPE ('.$BlockType.') at offset '.$BlockOffset); 118 } 119 120 unset($info['flac'][$BlockTypeText]['raw']); 121 $info['avdataoffset'] = $this->ftell(); 122 } 123 while ($LastBlockFlag === false); 124 125 // handle tags 126 if (!empty($info['flac']['VORBIS_COMMENT']['comments'])) { 127 $info['flac']['comments'] = $info['flac']['VORBIS_COMMENT']['comments']; 128 } 129 if (!empty($info['flac']['VORBIS_COMMENT']['vendor'])) { 130 $info['audio']['encoder'] = str_replace('reference ', '', $info['flac']['VORBIS_COMMENT']['vendor']); 131 } 132 133 // copy attachments to 'comments' array if nesesary 134 if (isset($info['flac']['PICTURE']) && ($this->getid3->option_save_attachments !== getID3::ATTACHMENTS_NONE)) { 135 foreach ($info['flac']['PICTURE'] as $entry) { 136 if (!empty($entry['data'])) { 137 $info['flac']['comments']['picture'][] = array('image_mime'=>$entry['image_mime'], 'data'=>$entry['data']); 138 } 139 } 140 } 141 142 if (isset($info['flac']['STREAMINFO'])) { 143 if (!$this->isDependencyFor('matroska')) { 144 $info['flac']['compressed_audio_bytes'] = $info['avdataend'] - $info['avdataoffset']; 145 } 146 $info['flac']['uncompressed_audio_bytes'] = $info['flac']['STREAMINFO']['samples_stream'] * $info['flac']['STREAMINFO']['channels'] * ($info['flac']['STREAMINFO']['bits_per_sample'] / 8); 147 if ($info['flac']['uncompressed_audio_bytes'] == 0) { 148 return $this->error('Corrupt FLAC file: uncompressed_audio_bytes == zero'); 149 } 150 if (!empty($info['flac']['compressed_audio_bytes'])) { 151 $info['flac']['compression_ratio'] = $info['flac']['compressed_audio_bytes'] / $info['flac']['uncompressed_audio_bytes']; 152 } 153 } 154 155 // set md5_data_source - built into flac 0.5+ 156 if (isset($info['flac']['STREAMINFO']['audio_signature'])) { 157 158 if ($info['flac']['STREAMINFO']['audio_signature'] === str_repeat("\x00", 16)) { 159 $this->warning('FLAC STREAMINFO.audio_signature is null (known issue with libOggFLAC)'); 160 } 161 else { 162 $info['md5_data_source'] = ''; 163 $md5 = $info['flac']['STREAMINFO']['audio_signature']; 164 for ($i = 0; $i < strlen($md5); $i++) { 165 $info['md5_data_source'] .= str_pad(dechex(ord($md5[$i])), 2, '00', STR_PAD_LEFT); 166 } 167 if (!preg_match('/^[0-9a-f]{32}$/', $info['md5_data_source'])) { 168 unset($info['md5_data_source']); 169 } 170 } 171 } 172 173 if (isset($info['flac']['STREAMINFO']['bits_per_sample'])) { 174 $info['audio']['bits_per_sample'] = $info['flac']['STREAMINFO']['bits_per_sample']; 175 if ($info['audio']['bits_per_sample'] == 8) { 176 // special case 177 // must invert sign bit on all data bytes before MD5'ing to match FLAC's calculated value 178 // MD5sum calculates on unsigned bytes, but FLAC calculated MD5 on 8-bit audio data as signed 179 $this->warning('FLAC calculates MD5 data strangely on 8-bit audio, so the stored md5_data_source value will not match the decoded WAV file'); 180 } 181 } 182 183 return true; 184 } 185 186 private function parseSTREAMINFO($BlockData) { 187 $info = &$this->getid3->info; 188 189 $info['flac']['STREAMINFO'] = array(); 190 $streaminfo = &$info['flac']['STREAMINFO']; 191 192 $streaminfo['min_block_size'] = getid3_lib::BigEndian2Int(substr($BlockData, 0, 2)); 193 $streaminfo['max_block_size'] = getid3_lib::BigEndian2Int(substr($BlockData, 2, 2)); 194 $streaminfo['min_frame_size'] = getid3_lib::BigEndian2Int(substr($BlockData, 4, 3)); 195 $streaminfo['max_frame_size'] = getid3_lib::BigEndian2Int(substr($BlockData, 7, 3)); 196 197 $SRCSBSS = getid3_lib::BigEndian2Bin(substr($BlockData, 10, 8)); 198 $streaminfo['sample_rate'] = getid3_lib::Bin2Dec(substr($SRCSBSS, 0, 20)); 199 $streaminfo['channels'] = getid3_lib::Bin2Dec(substr($SRCSBSS, 20, 3)) + 1; 200 $streaminfo['bits_per_sample'] = getid3_lib::Bin2Dec(substr($SRCSBSS, 23, 5)) + 1; 201 $streaminfo['samples_stream'] = getid3_lib::Bin2Dec(substr($SRCSBSS, 28, 36)); 202 203 $streaminfo['audio_signature'] = substr($BlockData, 18, 16); 204 205 if (!empty($streaminfo['sample_rate'])) { 206 207 $info['audio']['bitrate_mode'] = 'vbr'; 208 $info['audio']['sample_rate'] = $streaminfo['sample_rate']; 209 $info['audio']['channels'] = $streaminfo['channels']; 210 $info['audio']['bits_per_sample'] = $streaminfo['bits_per_sample']; 211 $info['playtime_seconds'] = $streaminfo['samples_stream'] / $streaminfo['sample_rate']; 212 if ($info['playtime_seconds'] > 0) { 213 if (!$this->isDependencyFor('matroska')) { 214 $info['audio']['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['playtime_seconds']; 215 } 216 else { 217 $this->warning('Cannot determine audio bitrate because total stream size is unknown'); 218 } 219 } 220 221 } else { 222 return $this->error('Corrupt METAdata block: STREAMINFO'); 223 } 224 225 return true; 226 } 227 228 private function parseAPPLICATION($BlockData) { 229 $info = &$this->getid3->info; 230 231 $ApplicationID = getid3_lib::BigEndian2Int(substr($BlockData, 0, 4)); 232 $info['flac']['APPLICATION'][$ApplicationID]['name'] = self::applicationIDLookup($ApplicationID); 233 $info['flac']['APPLICATION'][$ApplicationID]['data'] = substr($BlockData, 4); 234 235 return true; 236 } 237 238 private function parseSEEKTABLE($BlockData) { 239 $info = &$this->getid3->info; 240 241 $offset = 0; 242 $BlockLength = strlen($BlockData); 243 $placeholderpattern = str_repeat("\xFF", 8); 244 while ($offset < $BlockLength) { 245 $SampleNumberString = substr($BlockData, $offset, 8); 246 $offset += 8; 247 if ($SampleNumberString == $placeholderpattern) { 248 249 // placeholder point 250 getid3_lib::safe_inc($info['flac']['SEEKTABLE']['placeholders'], 1); 251 $offset += 10; 252 253 } else { 254 255 $SampleNumber = getid3_lib::BigEndian2Int($SampleNumberString); 256 $info['flac']['SEEKTABLE'][$SampleNumber]['offset'] = getid3_lib::BigEndian2Int(substr($BlockData, $offset, 8)); 257 $offset += 8; 258 $info['flac']['SEEKTABLE'][$SampleNumber]['samples'] = getid3_lib::BigEndian2Int(substr($BlockData, $offset, 2)); 259 $offset += 2; 260 261 } 262 } 263 264 return true; 265 } 266 267 private function parseVORBIS_COMMENT($BlockData) { 268 $info = &$this->getid3->info; 269 270 $getid3_ogg = new getid3_ogg($this->getid3); 271 if ($this->isDependencyFor('matroska')) { 272 $getid3_ogg->setStringMode($this->data_string); 273 } 274 $getid3_ogg->ParseVorbisComments(); 275 if (isset($info['ogg'])) { 276 unset($info['ogg']['comments_raw']); 277 $info['flac']['VORBIS_COMMENT'] = $info['ogg']; 278 unset($info['ogg']); 279 } 280 281 unset($getid3_ogg); 282 283 return true; 284 } 285 286 private function parseCUESHEET($BlockData) { 287 $info = &$this->getid3->info; 288 $offset = 0; 289 $info['flac']['CUESHEET']['media_catalog_number'] = trim(substr($BlockData, $offset, 128), "\0"); 290 $offset += 128; 291 $info['flac']['CUESHEET']['lead_in_samples'] = getid3_lib::BigEndian2Int(substr($BlockData, $offset, 8)); 292 $offset += 8; 293 $info['flac']['CUESHEET']['flags']['is_cd'] = (bool) (getid3_lib::BigEndian2Int(substr($BlockData, $offset, 1)) & 0x80); 294 $offset += 1; 295 296 $offset += 258; // reserved 297 298 $info['flac']['CUESHEET']['number_tracks'] = getid3_lib::BigEndian2Int(substr($BlockData, $offset, 1)); 299 $offset += 1; 300 301 for ($track = 0; $track < $info['flac']['CUESHEET']['number_tracks']; $track++) { 302 $TrackSampleOffset = getid3_lib::BigEndian2Int(substr($BlockData, $offset, 8)); 303 $offset += 8; 304 $TrackNumber = getid3_lib::BigEndian2Int(substr($BlockData, $offset, 1)); 305 $offset += 1; 306 307 $info['flac']['CUESHEET']['tracks'][$TrackNumber]['sample_offset'] = $TrackSampleOffset; 308 309 $info['flac']['CUESHEET']['tracks'][$TrackNumber]['isrc'] = substr($BlockData, $offset, 12); 310 $offset += 12; 311 312 $TrackFlagsRaw = getid3_lib::BigEndian2Int(substr($BlockData, $offset, 1)); 313 $offset += 1; 314 $info['flac']['CUESHEET']['tracks'][$TrackNumber]['flags']['is_audio'] = (bool) ($TrackFlagsRaw & 0x80); 315 $info['flac']['CUESHEET']['tracks'][$TrackNumber]['flags']['pre_emphasis'] = (bool) ($TrackFlagsRaw & 0x40); 316 317 $offset += 13; // reserved 318 319 $info['flac']['CUESHEET']['tracks'][$TrackNumber]['index_points'] = getid3_lib::BigEndian2Int(substr($BlockData, $offset, 1)); 320 $offset += 1; 321 322 for ($index = 0; $index < $info['flac']['CUESHEET']['tracks'][$TrackNumber]['index_points']; $index++) { 323 $IndexSampleOffset = getid3_lib::BigEndian2Int(substr($BlockData, $offset, 8)); 324 $offset += 8; 325 $IndexNumber = getid3_lib::BigEndian2Int(substr($BlockData, $offset, 1)); 326 $offset += 1; 327 328 $offset += 3; // reserved 329 330 $info['flac']['CUESHEET']['tracks'][$TrackNumber]['indexes'][$IndexNumber] = $IndexSampleOffset; 331 } 332 } 333 334 return true; 335 } 336 337 /** 338 * Parse METADATA_BLOCK_PICTURE flac structure and extract attachment 339 * External usage: audio.ogg 340 */ 341 public function parsePICTURE() { 342 $info = &$this->getid3->info; 343 344 $picture['typeid'] = getid3_lib::BigEndian2Int($this->fread(4)); 345 $picture['type'] = self::pictureTypeLookup($picture['typeid']); 346 $picture['image_mime'] = $this->fread(getid3_lib::BigEndian2Int($this->fread(4))); 347 $descr_length = getid3_lib::BigEndian2Int($this->fread(4)); 348 if ($descr_length) { 349 $picture['description'] = $this->fread($descr_length); 350 } 351 $picture['width'] = getid3_lib::BigEndian2Int($this->fread(4)); 352 $picture['height'] = getid3_lib::BigEndian2Int($this->fread(4)); 353 $picture['color_depth'] = getid3_lib::BigEndian2Int($this->fread(4)); 354 $picture['colors_indexed'] = getid3_lib::BigEndian2Int($this->fread(4)); 355 $data_length = getid3_lib::BigEndian2Int($this->fread(4)); 356 357 if ($picture['image_mime'] == '-->') { 358 $picture['data'] = $this->fread($data_length); 359 } else { 360 $picture['data'] = $this->saveAttachment( 361 str_replace('/', '_', $picture['type']).'_'.$this->ftell(), 362 $this->ftell(), 363 $data_length, 364 $picture['image_mime']); 365 } 366 367 $info['flac']['PICTURE'][] = $picture; 368 369 return true; 370 } 371 372 public static function metaBlockTypeLookup($blocktype) { 373 static $lookup = array( 374 0 => 'STREAMINFO', 375 1 => 'PADDING', 376 2 => 'APPLICATION', 377 3 => 'SEEKTABLE', 378 4 => 'VORBIS_COMMENT', 379 5 => 'CUESHEET', 380 6 => 'PICTURE', 381 ); 382 return (isset($lookup[$blocktype]) ? $lookup[$blocktype] : 'reserved'); 383 } 384 385 public static function applicationIDLookup($applicationid) { 386 // http://flac.sourceforge.net/id.html 387 static $lookup = array( 388 0x41544348 => 'FlacFile', // "ATCH" 389 0x42534F4C => 'beSolo', // "BSOL" 390 0x42554753 => 'Bugs Player', // "BUGS" 391 0x43756573 => 'GoldWave cue points (specification)', // "Cues" 392 0x46696361 => 'CUE Splitter', // "Fica" 393 0x46746F6C => 'flac-tools', // "Ftol" 394 0x4D4F5442 => 'MOTB MetaCzar', // "MOTB" 395 0x4D505345 => 'MP3 Stream Editor', // "MPSE" 396 0x4D754D4C => 'MusicML: Music Metadata Language', // "MuML" 397 0x52494646 => 'Sound Devices RIFF chunk storage', // "RIFF" 398 0x5346464C => 'Sound Font FLAC', // "SFFL" 399 0x534F4E59 => 'Sony Creative Software', // "SONY" 400 0x5351455A => 'flacsqueeze', // "SQEZ" 401 0x54745776 => 'TwistedWave', // "TtWv" 402 0x55495453 => 'UITS Embedding tools', // "UITS" 403 0x61696666 => 'FLAC AIFF chunk storage', // "aiff" 404 0x696D6167 => 'flac-image application for storing arbitrary files in APPLICATION metadata blocks', // "imag" 405 0x7065656D => 'Parseable Embedded Extensible Metadata (specification)', // "peem" 406 0x71667374 => 'QFLAC Studio', // "qfst" 407 0x72696666 => 'FLAC RIFF chunk storage', // "riff" 408 0x74756E65 => 'TagTuner', // "tune" 409 0x78626174 => 'XBAT', // "xbat" 410 0x786D6364 => 'xmcd', // "xmcd" 411 ); 412 return (isset($lookup[$applicationid]) ? $lookup[$applicationid] : 'reserved'); 413 } 414 415 public static function pictureTypeLookup($type_id) { 416 static $lookup = array ( 417 0 => 'Other', 418 1 => '32x32 pixels \'file icon\' (PNG only)', 419 2 => 'Other file icon', 420 3 => 'Cover (front)', 421 4 => 'Cover (back)', 422 5 => 'Leaflet page', 423 6 => 'Media (e.g. label side of CD)', 424 7 => 'Lead artist/lead performer/soloist', 425 8 => 'Artist/performer', 426 9 => 'Conductor', 427 10 => 'Band/Orchestra', 428 11 => 'Composer', 429 12 => 'Lyricist/text writer', 430 13 => 'Recording Location', 431 14 => 'During recording', 432 15 => 'During performance', 433 16 => 'Movie/video screen capture', 434 17 => 'A bright coloured fish', 435 18 => 'Illustration', 436 19 => 'Band/artist logotype', 437 20 => 'Publisher/Studio logotype', 438 ); 439 return (isset($lookup[$type_id]) ? $lookup[$type_id] : 'reserved'); 440 } 441 442 }
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| Generated: Tue Mar 25 01:41:18 2014 | WordPress honlapkészítés: online1.hu |