name : module.audio.tak.php <?php ///////////////////////////////////////////////////////////////// /// getID3() by James Heinrich <info@getid3.org> // // available at http://getid3.sourceforge.net // // or https://www.getid3.org // // also https://github.com/JamesHeinrich/getID3 // ///////////////////////////////////////////////////////////////// // See readme.txt for more details // ///////////////////////////////////////////////////////////////// // // // module.audio.tak.php // // module for analyzing Tom's lossless Audio Kompressor // // dependencies: NONE // // /// ///////////////////////////////////////////////////////////////// if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers exit; } class getid3_tak extends getid3_handler { /** * @return bool */ public function Analyze() { $info = &$this->getid3->info; $info['fileformat'] = 'tak'; $info['audio']['dataformat'] = 'tak'; $info['audio']['bitrate_mode'] = 'vbr'; $info['audio']['lossless'] = true; $info['tak_audio']['raw'] = array(); $thisfile_takaudio = &$info['tak_audio']; $thisfile_takaudio_raw = &$thisfile_takaudio['raw']; $this->fseek($info['avdataoffset']); $TAKMetaData = $this->fread(4); $thisfile_takaudio_raw['magic'] = $TAKMetaData; $magic = 'tBaK'; if ($thisfile_takaudio_raw['magic'] != $magic) { $this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($thisfile_takaudio_raw['magic']).'"'); unset($info['fileformat']); return false; } $offset = 4; //skip magic $this->fseek($offset); $TAKMetaData = $this->fread(4); //read Metadata Block Header $objtype = getid3_lib::BigEndian2Int(substr($TAKMetaData, 0, 1)); //Metadata Block Object Type $objlength = getid3_lib::LittleEndian2Int(substr($TAKMetaData, 1, 3)); //Metadata Block Object Lenght excluding header if ($objtype == 1) { //The First Metadata Block Object must be of Type 1 (STREAMINFO) $offset += 4; //skip to Metadata Block contents $this->fseek($offset); $TAKMetaData = $this->fread($objlength); // Get the raw Metadata Block Data $thisfile_takaudio_raw['STREAMINFO'] = getid3_lib::LittleEndian2Bin(substr($TAKMetaData, 0, $objlength - 3)); $offset += $objlength; // Move to the next Metadata Block Object $thisfile_takaudio['channels'] = getid3_lib::Bin2Dec(substr($thisfile_takaudio_raw['STREAMINFO'], 1, 4)) + 1; $thisfile_takaudio['bits_per_sample'] = getid3_lib::Bin2Dec(substr($thisfile_takaudio_raw['STREAMINFO'], 5, 5)) + 8; $thisfile_takaudio['sample_rate'] = getid3_lib::Bin2Dec(substr($thisfile_takaudio_raw['STREAMINFO'], 10, 18)) + 6000; $thisfile_takaudio['samples'] = getid3_lib::Bin2Dec(substr($thisfile_takaudio_raw['STREAMINFO'], 31, 35)); $thisfile_takaudio['framesize'] = self::TAKFramesizeLookup(getid3_lib::Bin2Dec(substr($thisfile_takaudio_raw['STREAMINFO'], 66, 4))); $thisfile_takaudio['codectype'] = self::TAKCodecTypeLookup(getid3_lib::Bin2Dec(substr($thisfile_takaudio_raw['STREAMINFO'], 74, 6))); } else { $this->error('Expecting Type 1 (STREAMINFO) Metadata Object header, but found Type "'.$objtype.'" Object instead'); unset($info['fileformat']); return false; } $this->fseek($offset); $TAKMetaData = $this->fread(4); $objtype = getid3_lib::BigEndian2Int(substr($TAKMetaData, 0, 1)); $objlength = getid3_lib::LittleEndian2Int(substr($TAKMetaData, 1, 3)); while ($objtype != 0) { switch ($objtype) { case 4 : // ENCODERINFO Metadata Block $offset += 4; $this->fseek($offset); $TAKMetaData = $this->fread($objlength); $ver = getid3_lib::LittleEndian2Int(substr($TAKMetaData, 0, 3)); $major = ($ver & 0xff0000) >> 16; $minor = ($ver & 0x00ff00) >> 8; $revision= $ver & 0x0000ff; $thisfile_takaudio['version'] = 'TAK V '.$major.'.'.$minor.'.'.$revision; $thisfile_takaudio['profile'] = self::TAKProfileLookup(getid3_lib::BigEndian2Int(substr($TAKMetaData, 3, 1))); $offset += $objlength; break; case 6 : // MD5 Checksum Metadata Block $offset += 4; $this->fseek($offset); $TAKMetaData = $this->fread($objlength); $thisfile_takaudio_raw['MD5Data'] = substr($TAKMetaData, 0, 16); $offset += $objlength; break; case 7 : // LASTFRAME Metadata Block $offset += 4; $this->fseek($offset); $TAKMetaData = $this->fread($objlength); $thisfile_takaudio['lastframe_pos'] = getid3_lib::LittleEndian2Int(substr($TAKMetaData, 0, 5)); $thisfile_takaudio['last_frame_size'] = getid3_lib::LittleEndian2Int(substr($TAKMetaData, 5, 3)); $offset += $objlength; break; case 3 : // ORIGINALFILEDATA Metadata Block $offset += 4; $this->fseek($offset); $TAKMetaData = $this->fread($objlength); $headersize = getid3_lib::LittleEndian2Int(substr($TAKMetaData, 0, 3)); $footersize = getid3_lib::LittleEndian2Int(substr($TAKMetaData, 3, 3)); if ($headersize) $thisfile_takaudio_raw['header_data'] = substr($TAKMetaData, 6, $headersize); if ($footersize) $thisfile_takaudio_raw['footer_data'] = substr($TAKMetaData, $headersize, $footersize); $offset += $objlength; break; default : // PADDING or SEEKTABLE Metadata Block. Just skip it $offset += 4; $this->fseek($offset); $TAKMetaData = $this->fread($objlength); $offset += $objlength; break; } $this->fseek($offset); $TAKMetaData = $this->fread(4); $objtype = getid3_lib::BigEndian2Int(substr($TAKMetaData, 0, 1)); $objlength = getid3_lib::LittleEndian2Int(substr($TAKMetaData, 1, 3)); } // Finished all Metadata Blocks. So update $info['avdataoffset'] because next block is the first Audio data block $info['avdataoffset'] = $offset; $info['audio']['channels'] = $thisfile_takaudio['channels']; if ($thisfile_takaudio['sample_rate'] == 0) { $this->error('Corrupt TAK file: samplerate == zero'); return false; } $info['audio']['sample_rate'] = $thisfile_takaudio['sample_rate']; $thisfile_takaudio['playtime'] = $thisfile_takaudio['samples'] / $thisfile_takaudio['sample_rate']; if ($thisfile_takaudio['playtime'] == 0) { $this->error('Corrupt TAK file: playtime == zero'); return false; } $info['playtime_seconds'] = $thisfile_takaudio['playtime']; $thisfile_takaudio['compressed_size'] = $info['avdataend'] - $info['avdataoffset']; $thisfile_takaudio['uncompressed_size'] = $thisfile_takaudio['samples'] * $thisfile_takaudio['channels'] * ($thisfile_takaudio['bits_per_sample'] / 8); if ($thisfile_takaudio['uncompressed_size'] == 0) { $this->error('Corrupt TAK file: uncompressed_size == zero'); return false; } $thisfile_takaudio['compression_ratio'] = $thisfile_takaudio['compressed_size'] / ($thisfile_takaudio['uncompressed_size'] + $offset); $thisfile_takaudio['bitrate'] = (($thisfile_takaudio['samples'] * $thisfile_takaudio['channels'] * $thisfile_takaudio['bits_per_sample']) / $thisfile_takaudio['playtime']) * $thisfile_takaudio['compression_ratio']; $info['audio']['bitrate'] = $thisfile_takaudio['bitrate']; if (empty($thisfile_takaudio_raw['MD5Data'])) { //$this->warning('MD5Data is not set'); } elseif ($thisfile_takaudio_raw['MD5Data'] === str_repeat("\x00", 16)) { //$this->warning('MD5Data is null'); } else { $info['md5_data_source'] = ''; $md5 = $thisfile_takaudio_raw['MD5Data']; for ($i = 0; $i < strlen($md5); $i++) { $info['md5_data_source'] .= str_pad(dechex(ord($md5[$i])), 2, '00', STR_PAD_LEFT); } if (!preg_match('/^[0-9a-f]{32}$/', $info['md5_data_source'])) { unset($info['md5_data_source']); } } foreach (array('bits_per_sample', 'version', 'profile') as $key) { if (!empty($thisfile_takaudio[$key])) { $info['audio'][$key] = $thisfile_takaudio[$key]; } } return true; } public function TAKFramesizeLookup($framesize) { static $TAKFramesizeLookup = array( 0 => '94 ms', 1 => '125 ms', 2 => '188 ms', 3 => '250 ms', 4 => '4096 samples', 5 => '8192 samples', 6 => '16384 samples', 7 => '512 samples', 8 => '1024 samples', 9 => '2048 samples' ); return (isset($TAKFramesizeLookup[$framesize]) ? $TAKFramesizeLookup[$framesize] : 'invalid'); } public function TAKCodecTypeLookup($code) { static $TAKCodecTypeLookup = array( 0 => 'Integer 24 bit (TAK 1.0)', 1 => 'Experimental!', 2 => 'Integer 24 bit (TAK 2.0)', 3 => 'LossyWav (TAK 2.1)', 4 => 'Integer 24 bit MC (TAK 2.2)' ); return (isset($TAKCodecTypeLookup[$code]) ? $TAKCodecTypeLookup[$code] : 'invalid'); } public function TAKProfileLookup($code) { $out ='-p'; $evaluation = ($code & 0xf0) >> 4; $compresion = $code & 0x0f; static $TAKEvaluationLookup = array( 0 => '', 1 => 'e', 2 => 'm' ); return (isset($TAKEvaluationLookup[$evaluation]) ? $out .= $compresion . $TAKEvaluationLookup[$evaluation] : 'invalid'); } }