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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.optimfrog.php // 11 // module for analyzing OptimFROG audio files // 12 // dependencies: module.audio.riff.php // 13 // /// 14 ///////////////////////////////////////////////////////////////// 15 16 getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio-video.riff.php', __FILE__, true); 17 18 class getid3_optimfrog 19 { 20 21 function getid3_optimfrog(&$fd, &$ThisFileInfo) { 22 $ThisFileInfo['fileformat'] = 'ofr'; 23 $ThisFileInfo['audio']['dataformat'] = 'ofr'; 24 $ThisFileInfo['audio']['bitrate_mode'] = 'vbr'; 25 $ThisFileInfo['audio']['lossless'] = true; 26 27 fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET); 28 $OFRheader = fread($fd, 8); 29 if (substr($OFRheader, 0, 5) == '*RIFF') { 30 31 return $this->ParseOptimFROGheader42($fd, $ThisFileInfo); 32 33 } elseif (substr($OFRheader, 0, 3) == 'OFR') { 34 35 return $this->ParseOptimFROGheader45($fd, $ThisFileInfo); 36 37 } 38 39 $ThisFileInfo['error'][] = 'Expecting "*RIFF" or "OFR " at offset '.$ThisFileInfo['avdataoffset'].', found "'.$OFRheader.'"'; 40 unset($ThisFileInfo['fileformat']); 41 return false; 42 } 43 44 45 function ParseOptimFROGheader42(&$fd, &$ThisFileInfo) { 46 // for fileformat of v4.21 and older 47 48 fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET); 49 $OptimFROGheaderData = fread($fd, 45); 50 $ThisFileInfo['avdataoffset'] = 45; 51 52 $OptimFROGencoderVersion_raw = getid3_lib::LittleEndian2Int(substr($OptimFROGheaderData, 0, 1)); 53 $OptimFROGencoderVersion_major = floor($OptimFROGencoderVersion_raw / 10); 54 $OptimFROGencoderVersion_minor = $OptimFROGencoderVersion_raw - ($OptimFROGencoderVersion_major * 10); 55 $RIFFdata = substr($OptimFROGheaderData, 1, 44); 56 $OrignalRIFFheaderSize = getid3_lib::LittleEndian2Int(substr($RIFFdata, 4, 4)) + 8; 57 $OrignalRIFFdataSize = getid3_lib::LittleEndian2Int(substr($RIFFdata, 40, 4)) + 44; 58 59 if ($OrignalRIFFheaderSize > $OrignalRIFFdataSize) { 60 $ThisFileInfo['avdataend'] -= ($OrignalRIFFheaderSize - $OrignalRIFFdataSize); 61 fseek($fd, $ThisFileInfo['avdataend'], SEEK_SET); 62 $RIFFdata .= fread($fd, $OrignalRIFFheaderSize - $OrignalRIFFdataSize); 63 } 64 65 // move the data chunk after all other chunks (if any) 66 // so that the RIFF parser doesn't see EOF when trying 67 // to skip over the data chunk 68 $RIFFdata = substr($RIFFdata, 0, 36).substr($RIFFdata, 44).substr($RIFFdata, 36, 8); 69 getid3_riff::ParseRIFFdata($RIFFdata, $ThisFileInfo); 70 71 $ThisFileInfo['audio']['encoder'] = 'OptimFROG '.$OptimFROGencoderVersion_major.'.'.$OptimFROGencoderVersion_minor; 72 $ThisFileInfo['audio']['channels'] = $ThisFileInfo['riff']['audio'][0]['channels']; 73 $ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['riff']['audio'][0]['sample_rate']; 74 $ThisFileInfo['audio']['bits_per_sample'] = $ThisFileInfo['riff']['audio'][0]['bits_per_sample']; 75 $ThisFileInfo['playtime_seconds'] = $OrignalRIFFdataSize / ($ThisFileInfo['audio']['channels'] * $ThisFileInfo['audio']['sample_rate'] * ($ThisFileInfo['audio']['bits_per_sample'] / 8)); 76 $ThisFileInfo['audio']['bitrate'] = (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / $ThisFileInfo['playtime_seconds']; 77 78 return true; 79 } 80 81 82 function ParseOptimFROGheader45(&$fd, &$ThisFileInfo) { 83 // for fileformat of v4.50a and higher 84 85 $RIFFdata = ''; 86 fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET); 87 while (!feof($fd) && (ftell($fd) < $ThisFileInfo['avdataend'])) { 88 $BlockOffset = ftell($fd); 89 $BlockData = fread($fd, 8); 90 $offset = 8; 91 $BlockName = substr($BlockData, 0, 4); 92 $BlockSize = getid3_lib::LittleEndian2Int(substr($BlockData, 4, 4)); 93 94 if ($BlockName == 'OFRX') { 95 $BlockName = 'OFR '; 96 } 97 if (!isset($ThisFileInfo['ofr'][$BlockName])) { 98 $ThisFileInfo['ofr'][$BlockName] = array(); 99 } 100 $thisfile_ofr_thisblock = &$ThisFileInfo['ofr'][$BlockName]; 101 102 switch ($BlockName) { 103 case 'OFR ': 104 105 // shortcut 106 $thisfile_ofr_thisblock['offset'] = $BlockOffset; 107 $thisfile_ofr_thisblock['size'] = $BlockSize; 108 109 $ThisFileInfo['audio']['encoder'] = 'OptimFROG 4.50 alpha'; 110 switch ($BlockSize) { 111 case 12: 112 case 15: 113 // good 114 break; 115 116 default: 117 $ThisFileInfo['warning'][] = '"'.$BlockName.'" contains more data than expected (expected 12 or 15 bytes, found '.$BlockSize.' bytes)'; 118 break; 119 } 120 $BlockData .= fread($fd, $BlockSize); 121 122 $thisfile_ofr_thisblock['total_samples'] = getid3_lib::LittleEndian2Int(substr($BlockData, $offset, 6)); 123 $offset += 6; 124 $thisfile_ofr_thisblock['raw']['sample_type'] = getid3_lib::LittleEndian2Int(substr($BlockData, $offset, 1)); 125 $thisfile_ofr_thisblock['sample_type'] = $this->OptimFROGsampleTypeLookup($thisfile_ofr_thisblock['raw']['sample_type']); 126 $offset += 1; 127 $thisfile_ofr_thisblock['channel_config'] = getid3_lib::LittleEndian2Int(substr($BlockData, $offset, 1)); 128 $thisfile_ofr_thisblock['channels'] = $thisfile_ofr_thisblock['channel_config']; 129 $offset += 1; 130 $thisfile_ofr_thisblock['sample_rate'] = getid3_lib::LittleEndian2Int(substr($BlockData, $offset, 4)); 131 $offset += 4; 132 133 if ($BlockSize > 12) { 134 135 // OFR 4.504b or higher 136 $thisfile_ofr_thisblock['channels'] = $this->OptimFROGchannelConfigNumChannelsLookup($thisfile_ofr_thisblock['channel_config']); 137 $thisfile_ofr_thisblock['raw']['encoder_id'] = getid3_lib::LittleEndian2Int(substr($BlockData, $offset, 2)); 138 $thisfile_ofr_thisblock['encoder'] = $this->OptimFROGencoderNameLookup($thisfile_ofr_thisblock['raw']['encoder_id']); 139 $offset += 2; 140 $thisfile_ofr_thisblock['raw']['compression'] = getid3_lib::LittleEndian2Int(substr($BlockData, $offset, 1)); 141 $thisfile_ofr_thisblock['compression'] = $this->OptimFROGcompressionLookup($thisfile_ofr_thisblock['raw']['compression']); 142 $thisfile_ofr_thisblock['speedup'] = $this->OptimFROGspeedupLookup($thisfile_ofr_thisblock['raw']['compression']); 143 $offset += 1; 144 145 $ThisFileInfo['audio']['encoder'] = 'OptimFROG '.$thisfile_ofr_thisblock['encoder']; 146 $ThisFileInfo['audio']['encoder_options'] = '--mode '.$thisfile_ofr_thisblock['compression']; 147 148 if ((($thisfile_ofr_thisblock['raw']['encoder_id'] & 0xF0) >> 4) == 7) { // v4.507 149 if (strtolower(getid3_lib::fileextension($ThisFileInfo['filename'])) == 'ofs') { 150 // OptimFROG DualStream format is lossy, but as of v4.507 there is no way to tell the difference 151 // between lossless and lossy other than the file extension. 152 $ThisFileInfo['audio']['dataformat'] = 'ofs'; 153 $ThisFileInfo['audio']['lossless'] = true; 154 } 155 } 156 157 } 158 159 $ThisFileInfo['audio']['channels'] = $thisfile_ofr_thisblock['channels']; 160 $ThisFileInfo['audio']['sample_rate'] = $thisfile_ofr_thisblock['sample_rate']; 161 $ThisFileInfo['audio']['bits_per_sample'] = $this->OptimFROGbitsPerSampleTypeLookup($thisfile_ofr_thisblock['raw']['sample_type']); 162 break; 163 164 165 case 'COMP': 166 // unlike other block types, there CAN be multiple COMP blocks 167 168 $COMPdata['offset'] = $BlockOffset; 169 $COMPdata['size'] = $BlockSize; 170 171 if ($ThisFileInfo['avdataoffset'] == 0) { 172 $ThisFileInfo['avdataoffset'] = $BlockOffset; 173 } 174 175 // Only interested in first 14 bytes (only first 12 needed for v4.50 alpha), not actual audio data 176 $BlockData .= fread($fd, 14); 177 fseek($fd, $BlockSize - 14, SEEK_CUR); 178 179 $COMPdata['crc_32'] = getid3_lib::LittleEndian2Int(substr($BlockData, $offset, 4)); 180 $offset += 4; 181 $COMPdata['sample_count'] = getid3_lib::LittleEndian2Int(substr($BlockData, $offset, 4)); 182 $offset += 4; 183 $COMPdata['raw']['sample_type'] = getid3_lib::LittleEndian2Int(substr($BlockData, $offset, 1)); 184 $COMPdata['sample_type'] = $this->OptimFROGsampleTypeLookup($COMPdata['raw']['sample_type']); 185 $offset += 1; 186 $COMPdata['raw']['channel_configuration'] = getid3_lib::LittleEndian2Int(substr($BlockData, $offset, 1)); 187 $COMPdata['channel_configuration'] = $this->OptimFROGchannelConfigurationLookup($COMPdata['raw']['channel_configuration']); 188 $offset += 1; 189 $COMPdata['raw']['algorithm_id'] = getid3_lib::LittleEndian2Int(substr($BlockData, $offset, 2)); 190 //$COMPdata['algorithm'] = OptimFROGalgorithmNameLookup($COMPdata['raw']['algorithm_id']); 191 $offset += 2; 192 193 if ($ThisFileInfo['ofr']['OFR ']['size'] > 12) { 194 195 // OFR 4.504b or higher 196 $COMPdata['raw']['encoder_id'] = getid3_lib::LittleEndian2Int(substr($BlockData, $offset, 2)); 197 $COMPdata['encoder'] = $this->OptimFROGencoderNameLookup($COMPdata['raw']['encoder_id']); 198 $offset += 2; 199 200 } 201 202 if ($COMPdata['crc_32'] == 0x454E4F4E) { 203 // ASCII value of 'NONE' - placeholder value in v4.50a 204 $COMPdata['crc_32'] = false; 205 } 206 207 $thisfile_ofr_thisblock[] = $COMPdata; 208 break; 209 210 case 'HEAD': 211 $thisfile_ofr_thisblock['offset'] = $BlockOffset; 212 $thisfile_ofr_thisblock['size'] = $BlockSize; 213 214 $RIFFdata .= fread($fd, $BlockSize); 215 break; 216 217 case 'TAIL': 218 $thisfile_ofr_thisblock['offset'] = $BlockOffset; 219 $thisfile_ofr_thisblock['size'] = $BlockSize; 220 221 if ($BlockSize > 0) { 222 $RIFFdata .= fread($fd, $BlockSize); 223 } 224 break; 225 226 case 'RECV': 227 // block contains no useful meta data - simply note and skip 228 229 $thisfile_ofr_thisblock['offset'] = $BlockOffset; 230 $thisfile_ofr_thisblock['size'] = $BlockSize; 231 232 fseek($fd, $BlockSize, SEEK_CUR); 233 break; 234 235 236 case 'APET': 237 // APEtag v2 238 239 $thisfile_ofr_thisblock['offset'] = $BlockOffset; 240 $thisfile_ofr_thisblock['size'] = $BlockSize; 241 $ThisFileInfo['warning'][] = 'APEtag processing inside OptimFROG not supported in this version ('.GETID3_VERSION.') of getID3()'; 242 243 fseek($fd, $BlockSize, SEEK_CUR); 244 break; 245 246 247 case 'MD5 ': 248 // APEtag v2 249 250 $thisfile_ofr_thisblock['offset'] = $BlockOffset; 251 $thisfile_ofr_thisblock['size'] = $BlockSize; 252 253 if ($BlockSize == 16) { 254 255 $thisfile_ofr_thisblock['md5_binary'] = fread($fd, $BlockSize); 256 $thisfile_ofr_thisblock['md5_string'] = getid3_lib::PrintHexBytes($thisfile_ofr_thisblock['md5_binary'], true, false, false); 257 $ThisFileInfo['md5_data_source'] = $thisfile_ofr_thisblock['md5_string']; 258 259 } else { 260 261 $ThisFileInfo['warning'][] = 'Expecting block size of 16 in "MD5 " chunk, found '.$BlockSize.' instead'; 262 fseek($fd, $BlockSize, SEEK_CUR); 263 264 } 265 break; 266 267 268 default: 269 $thisfile_ofr_thisblock['offset'] = $BlockOffset; 270 $thisfile_ofr_thisblock['size'] = $BlockSize; 271 272 $ThisFileInfo['warning'][] = 'Unhandled OptimFROG block type "'.$BlockName.'" at offset '.$thisfile_ofr_thisblock['offset']; 273 fseek($fd, $BlockSize, SEEK_CUR); 274 break; 275 } 276 } 277 if (isset($ThisFileInfo['ofr']['TAIL']['offset'])) { 278 $ThisFileInfo['avdataend'] = $ThisFileInfo['ofr']['TAIL']['offset']; 279 } 280 281 $ThisFileInfo['playtime_seconds'] = (float) $ThisFileInfo['ofr']['OFR ']['total_samples'] / ($ThisFileInfo['audio']['channels'] * $ThisFileInfo['audio']['sample_rate']); 282 $ThisFileInfo['audio']['bitrate'] = (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / $ThisFileInfo['playtime_seconds']; 283 284 // move the data chunk after all other chunks (if any) 285 // so that the RIFF parser doesn't see EOF when trying 286 // to skip over the data chunk 287 $RIFFdata = substr($RIFFdata, 0, 36).substr($RIFFdata, 44).substr($RIFFdata, 36, 8); 288 getid3_riff::ParseRIFFdata($RIFFdata, $ThisFileInfo); 289 290 return true; 291 } 292 293 294 function OptimFROGsampleTypeLookup($SampleType) { 295 static $OptimFROGsampleTypeLookup = array( 296 0 => 'unsigned int (8-bit)', 297 1 => 'signed int (8-bit)', 298 2 => 'unsigned int (16-bit)', 299 3 => 'signed int (16-bit)', 300 4 => 'unsigned int (24-bit)', 301 5 => 'signed int (24-bit)', 302 6 => 'unsigned int (32-bit)', 303 7 => 'signed int (32-bit)', 304 8 => 'float 0.24 (32-bit)', 305 9 => 'float 16.8 (32-bit)', 306 10 => 'float 24.0 (32-bit)' 307 ); 308 return (isset($OptimFROGsampleTypeLookup[$SampleType]) ? $OptimFROGsampleTypeLookup[$SampleType] : false); 309 } 310 311 function OptimFROGbitsPerSampleTypeLookup($SampleType) { 312 static $OptimFROGbitsPerSampleTypeLookup = array( 313 0 => 8, 314 1 => 8, 315 2 => 16, 316 3 => 16, 317 4 => 24, 318 5 => 24, 319 6 => 32, 320 7 => 32, 321 8 => 32, 322 9 => 32, 323 10 => 32 324 ); 325 return (isset($OptimFROGbitsPerSampleTypeLookup[$SampleType]) ? $OptimFROGbitsPerSampleTypeLookup[$SampleType] : false); 326 } 327 328 function OptimFROGchannelConfigurationLookup($ChannelConfiguration) { 329 static $OptimFROGchannelConfigurationLookup = array( 330 0 => 'mono', 331 1 => 'stereo' 332 ); 333 return (isset($OptimFROGchannelConfigurationLookup[$ChannelConfiguration]) ? $OptimFROGchannelConfigurationLookup[$ChannelConfiguration] : false); 334 } 335 336 function OptimFROGchannelConfigNumChannelsLookup($ChannelConfiguration) { 337 static $OptimFROGchannelConfigNumChannelsLookup = array( 338 0 => 1, 339 1 => 2 340 ); 341 return (isset($OptimFROGchannelConfigNumChannelsLookup[$ChannelConfiguration]) ? $OptimFROGchannelConfigNumChannelsLookup[$ChannelConfiguration] : false); 342 } 343 344 345 346 // function OptimFROGalgorithmNameLookup($AlgorithID) { 347 // static $OptimFROGalgorithmNameLookup = array(); 348 // return (isset($OptimFROGalgorithmNameLookup[$AlgorithID]) ? $OptimFROGalgorithmNameLookup[$AlgorithID] : false); 349 // } 350 351 352 function OptimFROGencoderNameLookup($EncoderID) { 353 // version = (encoderID >> 4) + 4500 354 // system = encoderID & 0xF 355 356 $EncoderVersion = number_format(((($EncoderID & 0xF0) >> 4) + 4500) / 1000, 3); 357 $EncoderSystemID = ($EncoderID & 0x0F); 358 359 static $OptimFROGencoderSystemLookup = array( 360 0x00 => 'Windows console', 361 0x01 => 'Linux console', 362 0x0F => 'unknown' 363 ); 364 return $EncoderVersion.' ('.(isset($OptimFROGencoderSystemLookup[$EncoderSystemID]) ? $OptimFROGencoderSystemLookup[$EncoderSystemID] : 'undefined encoder type (0x'.dechex($EncoderSystemID).')').')'; 365 } 366 367 function OptimFROGcompressionLookup($CompressionID) { 368 // mode = compression >> 3 369 // speedup = compression & 0x07 370 371 $CompressionModeID = ($CompressionID & 0xF8) >> 3; 372 //$CompressionSpeedupID = ($CompressionID & 0x07); 373 374 static $OptimFROGencoderModeLookup = array( 375 0x00 => 'fast', 376 0x01 => 'normal', 377 0x02 => 'high', 378 0x03 => 'extra', // extranew (some versions) 379 0x04 => 'best', // bestnew (some versions) 380 0x05 => 'ultra', 381 0x06 => 'insane', 382 0x07 => 'highnew', 383 0x08 => 'extranew', 384 0x09 => 'bestnew' 385 ); 386 return (isset($OptimFROGencoderModeLookup[$CompressionModeID]) ? $OptimFROGencoderModeLookup[$CompressionModeID] : 'undefined mode (0x'.str_pad(dechex($CompressionModeID), 2, '0', STR_PAD_LEFT).')'); 387 } 388 389 function OptimFROGspeedupLookup($CompressionID) { 390 // mode = compression >> 3 391 // speedup = compression & 0x07 392 393 //$CompressionModeID = ($CompressionID & 0xF8) >> 3; 394 $CompressionSpeedupID = ($CompressionID & 0x07); 395 396 static $OptimFROGencoderSpeedupLookup = array( 397 0x00 => '1x', 398 0x01 => '2x', 399 0x02 => '4x' 400 ); 401 402 return (isset($OptimFROGencoderSpeedupLookup[$CompressionSpeedupID]) ? $OptimFROGencoderSpeedupLookup[$CompressionSpeedupID] : 'undefined mode (0x'.dechex($CompressionSpeedupID)); 403 } 404 405 } 406 407 408 ?>
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| Generated: Mon Jul 9 18:01:44 2012 | Cross-referenced by PHPXref 0.7 |