name : module.audio.vqf.php <?php ///////////////////////////////////////////////////////////////// /// getID3() by James Heinrich <info@getid3.org> // // available at https://github.com/JamesHeinrich/getID3 // // or https://www.getid3.org // // or http://getid3.sourceforge.net // // see readme.txt for more details // ///////////////////////////////////////////////////////////////// // // // module.audio.vqf.php // // module for analyzing VQF audio files // // dependencies: NONE // // /// ///////////////////////////////////////////////////////////////// if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers exit; } class getid3_vqf extends getid3_handler { /** * @return bool */ public function Analyze() { $info = &$this->getid3->info; // based loosely on code from TTwinVQ by Jurgen Faul <jfaulØgmx*de> // http://jfaul.de/atl or http://j-faul.virtualave.net/atl/atl.html $info['fileformat'] = 'vqf'; $info['audio']['dataformat'] = 'vqf'; $info['audio']['bitrate_mode'] = 'cbr'; $info['audio']['lossless'] = false; // shortcut $info['vqf']['raw'] = array(); $thisfile_vqf = &$info['vqf']; $thisfile_vqf_raw = &$thisfile_vqf['raw']; $this->fseek($info['avdataoffset']); $VQFheaderData = $this->fread(16); $offset = 0; $thisfile_vqf_raw['header_tag'] = substr($VQFheaderData, $offset, 4); $magic = 'TWIN'; if ($thisfile_vqf_raw['header_tag'] != $magic) { $this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($thisfile_vqf_raw['header_tag']).'"'); unset($info['vqf']); unset($info['fileformat']); return false; } $offset += 4; $thisfile_vqf_raw['version'] = substr($VQFheaderData, $offset, 8); $offset += 8; $thisfile_vqf_raw['size'] = getid3_lib::BigEndian2Int(substr($VQFheaderData, $offset, 4)); $offset += 4; while ($this->ftell() < $info['avdataend']) { $ChunkBaseOffset = $this->ftell(); $chunkoffset = 0; $ChunkData = $this->fread(8); $ChunkName = substr($ChunkData, $chunkoffset, 4); if ($ChunkName == 'DATA') { $info['avdataoffset'] = $ChunkBaseOffset; break; } $chunkoffset += 4; $ChunkSize = getid3_lib::BigEndian2Int(substr($ChunkData, $chunkoffset, 4)); $chunkoffset += 4; if ($ChunkSize > ($info['avdataend'] - $this->ftell())) { $this->error('Invalid chunk size ('.$ChunkSize.') for chunk "'.$ChunkName.'" at offset '.$ChunkBaseOffset); break; } if ($ChunkSize > 0) { $ChunkData .= $this->fread($ChunkSize); } switch ($ChunkName) { case 'COMM': // shortcut $thisfile_vqf['COMM'] = array(); $thisfile_vqf_COMM = &$thisfile_vqf['COMM']; $thisfile_vqf_COMM['channel_mode'] = getid3_lib::BigEndian2Int(substr($ChunkData, $chunkoffset, 4)); $chunkoffset += 4; $thisfile_vqf_COMM['bitrate'] = getid3_lib::BigEndian2Int(substr($ChunkData, $chunkoffset, 4)); $chunkoffset += 4; $thisfile_vqf_COMM['sample_rate'] = getid3_lib::BigEndian2Int(substr($ChunkData, $chunkoffset, 4)); $chunkoffset += 4; $thisfile_vqf_COMM['security_level'] = getid3_lib::BigEndian2Int(substr($ChunkData, $chunkoffset, 4)); $chunkoffset += 4; $info['audio']['channels'] = $thisfile_vqf_COMM['channel_mode'] + 1; $info['audio']['sample_rate'] = $this->VQFchannelFrequencyLookup($thisfile_vqf_COMM['sample_rate']); $info['audio']['bitrate'] = $thisfile_vqf_COMM['bitrate'] * 1000; $info['audio']['encoder_options'] = 'CBR' . ceil($info['audio']['bitrate']/1000); if ($info['audio']['bitrate'] == 0) { $this->error('Corrupt VQF file: bitrate_audio == zero'); return false; } break; case 'NAME': case 'AUTH': case '(c) ': case 'FILE': case 'COMT': case 'ALBM': $thisfile_vqf['comments'][$this->VQFcommentNiceNameLookup($ChunkName)][] = trim(substr($ChunkData, 8)); break; case 'DSIZ': $thisfile_vqf['DSIZ'] = getid3_lib::BigEndian2Int(substr($ChunkData, 8, 4)); break; default: $this->warning('Unhandled chunk type "'.$ChunkName.'" at offset '.$ChunkBaseOffset); break; } } $info['playtime_seconds'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['audio']['bitrate']; if (isset($thisfile_vqf['DSIZ']) && (($thisfile_vqf['DSIZ'] != ($info['avdataend'] - $info['avdataoffset'] - strlen('DATA'))))) { switch ($thisfile_vqf['DSIZ']) { case 0: case 1: $this->warning('Invalid DSIZ value "'.$thisfile_vqf['DSIZ'].'". This is known to happen with VQF files encoded by Ahead Nero, and seems to be its way of saying this is TwinVQF v'.($thisfile_vqf['DSIZ'] + 1).'.0'); $info['audio']['encoder'] = 'Ahead Nero'; break; default: $this->warning('Probable corrupted file - should be '.$thisfile_vqf['DSIZ'].' bytes, actually '.($info['avdataend'] - $info['avdataoffset'] - strlen('DATA'))); break; } } return true; } /** * @param int $frequencyid * * @return int */ public function VQFchannelFrequencyLookup($frequencyid) { static $VQFchannelFrequencyLookup = array( 11 => 11025, 22 => 22050, 44 => 44100 ); return (isset($VQFchannelFrequencyLookup[$frequencyid]) ? $VQFchannelFrequencyLookup[$frequencyid] : $frequencyid * 1000); } /** * @param string $shortname * * @return string */ public function VQFcommentNiceNameLookup($shortname) { static $VQFcommentNiceNameLookup = array( 'NAME' => 'title', 'AUTH' => 'artist', '(c) ' => 'copyright', 'FILE' => 'filename', 'COMT' => 'comment', 'ALBM' => 'album' ); return (isset($VQFcommentNiceNameLookup[$shortname]) ? $VQFcommentNiceNameLookup[$shortname] : $shortname); } }