diff options
Diffstat (limited to 'includes/getid3/module.audio.tak.php')
| -rw-r--r-- | includes/getid3/module.audio.tak.php | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/includes/getid3/module.audio.tak.php b/includes/getid3/module.audio.tak.php new file mode 100644 index 0000000..5d4ada5 --- /dev/null +++ b/includes/getid3/module.audio.tak.php @@ -0,0 +1,214 @@ +<?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 +{ + + 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'); + } + +} |