File indexing completed on 2024-12-22 05:33:13
0001 <?php 0002 ///////////////////////////////////////////////////////////////// 0003 /// getID3() by James Heinrich <info@getid3.org> // 0004 // available at http://getid3.sourceforge.net // 0005 // or http://www.getid3.org // 0006 // also https://github.com/JamesHeinrich/getID3 // 0007 ///////////////////////////////////////////////////////////////// 0008 // See readme.txt for more details // 0009 ///////////////////////////////////////////////////////////////// 0010 // // 0011 // module.audio.vqf.php // 0012 // module for analyzing VQF audio files // 0013 // dependencies: NONE // 0014 // /// 0015 ///////////////////////////////////////////////////////////////// 0016 0017 0018 class getid3_vqf extends getid3_handler 0019 { 0020 public function Analyze() { 0021 $info = &$this->getid3->info; 0022 0023 // based loosely on code from TTwinVQ by Jurgen Faul <jfaulØgmx*de> 0024 // http://jfaul.de/atl or http://j-faul.virtualave.net/atl/atl.html 0025 0026 $info['fileformat'] = 'vqf'; 0027 $info['audio']['dataformat'] = 'vqf'; 0028 $info['audio']['bitrate_mode'] = 'cbr'; 0029 $info['audio']['lossless'] = false; 0030 0031 // shortcut 0032 $info['vqf']['raw'] = array(); 0033 $thisfile_vqf = &$info['vqf']; 0034 $thisfile_vqf_raw = &$thisfile_vqf['raw']; 0035 0036 $this->fseek($info['avdataoffset']); 0037 $VQFheaderData = $this->fread(16); 0038 0039 $offset = 0; 0040 $thisfile_vqf_raw['header_tag'] = substr($VQFheaderData, $offset, 4); 0041 $magic = 'TWIN'; 0042 if ($thisfile_vqf_raw['header_tag'] != $magic) { 0043 $info['error'][] = 'Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($thisfile_vqf_raw['header_tag']).'"'; 0044 unset($info['vqf']); 0045 unset($info['fileformat']); 0046 return false; 0047 } 0048 $offset += 4; 0049 $thisfile_vqf_raw['version'] = substr($VQFheaderData, $offset, 8); 0050 $offset += 8; 0051 $thisfile_vqf_raw['size'] = getid3_lib::BigEndian2Int(substr($VQFheaderData, $offset, 4)); 0052 $offset += 4; 0053 0054 while ($this->ftell() < $info['avdataend']) { 0055 0056 $ChunkBaseOffset = $this->ftell(); 0057 $chunkoffset = 0; 0058 $ChunkData = $this->fread(8); 0059 $ChunkName = substr($ChunkData, $chunkoffset, 4); 0060 if ($ChunkName == 'DATA') { 0061 $info['avdataoffset'] = $ChunkBaseOffset; 0062 break; 0063 } 0064 $chunkoffset += 4; 0065 $ChunkSize = getid3_lib::BigEndian2Int(substr($ChunkData, $chunkoffset, 4)); 0066 $chunkoffset += 4; 0067 if ($ChunkSize > ($info['avdataend'] - $this->ftell())) { 0068 $info['error'][] = 'Invalid chunk size ('.$ChunkSize.') for chunk "'.$ChunkName.'" at offset '.$ChunkBaseOffset; 0069 break; 0070 } 0071 if ($ChunkSize > 0) { 0072 $ChunkData .= $this->fread($ChunkSize); 0073 } 0074 0075 switch ($ChunkName) { 0076 case 'COMM': 0077 // shortcut 0078 $thisfile_vqf['COMM'] = array(); 0079 $thisfile_vqf_COMM = &$thisfile_vqf['COMM']; 0080 0081 $thisfile_vqf_COMM['channel_mode'] = getid3_lib::BigEndian2Int(substr($ChunkData, $chunkoffset, 4)); 0082 $chunkoffset += 4; 0083 $thisfile_vqf_COMM['bitrate'] = getid3_lib::BigEndian2Int(substr($ChunkData, $chunkoffset, 4)); 0084 $chunkoffset += 4; 0085 $thisfile_vqf_COMM['sample_rate'] = getid3_lib::BigEndian2Int(substr($ChunkData, $chunkoffset, 4)); 0086 $chunkoffset += 4; 0087 $thisfile_vqf_COMM['security_level'] = getid3_lib::BigEndian2Int(substr($ChunkData, $chunkoffset, 4)); 0088 $chunkoffset += 4; 0089 0090 $info['audio']['channels'] = $thisfile_vqf_COMM['channel_mode'] + 1; 0091 $info['audio']['sample_rate'] = $this->VQFchannelFrequencyLookup($thisfile_vqf_COMM['sample_rate']); 0092 $info['audio']['bitrate'] = $thisfile_vqf_COMM['bitrate'] * 1000; 0093 $info['audio']['encoder_options'] = 'CBR' . ceil($info['audio']['bitrate']/1000); 0094 0095 if ($info['audio']['bitrate'] == 0) { 0096 $info['error'][] = 'Corrupt VQF file: bitrate_audio == zero'; 0097 return false; 0098 } 0099 break; 0100 0101 case 'NAME': 0102 case 'AUTH': 0103 case '(c) ': 0104 case 'FILE': 0105 case 'COMT': 0106 case 'ALBM': 0107 $thisfile_vqf['comments'][$this->VQFcommentNiceNameLookup($ChunkName)][] = trim(substr($ChunkData, 8)); 0108 break; 0109 0110 case 'DSIZ': 0111 $thisfile_vqf['DSIZ'] = getid3_lib::BigEndian2Int(substr($ChunkData, 8, 4)); 0112 break; 0113 0114 default: 0115 $info['warning'][] = 'Unhandled chunk type "'.$ChunkName.'" at offset '.$ChunkBaseOffset; 0116 break; 0117 } 0118 } 0119 0120 $info['playtime_seconds'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['audio']['bitrate']; 0121 0122 if (isset($thisfile_vqf['DSIZ']) && (($thisfile_vqf['DSIZ'] != ($info['avdataend'] - $info['avdataoffset'] - strlen('DATA'))))) { 0123 switch ($thisfile_vqf['DSIZ']) { 0124 case 0: 0125 case 1: 0126 $info['warning'][] = 'Invalid DSIZ value "'.$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'; 0127 $info['audio']['encoder'] = 'Ahead Nero'; 0128 break; 0129 0130 default: 0131 $info['warning'][] = 'Probable corrupted file - should be '.$thisfile_vqf['DSIZ'].' bytes, actually '.($info['avdataend'] - $info['avdataoffset'] - strlen('DATA')); 0132 break; 0133 } 0134 } 0135 0136 return true; 0137 } 0138 0139 public function VQFchannelFrequencyLookup($frequencyid) { 0140 static $VQFchannelFrequencyLookup = array( 0141 11 => 11025, 0142 22 => 22050, 0143 44 => 44100 0144 ); 0145 return (isset($VQFchannelFrequencyLookup[$frequencyid]) ? $VQFchannelFrequencyLookup[$frequencyid] : $frequencyid * 1000); 0146 } 0147 0148 public function VQFcommentNiceNameLookup($shortname) { 0149 static $VQFcommentNiceNameLookup = array( 0150 'NAME' => 'title', 0151 'AUTH' => 'artist', 0152 '(c) ' => 'copyright', 0153 'FILE' => 'filename', 0154 'COMT' => 'comment', 0155 'ALBM' => 'album' 0156 ); 0157 return (isset($VQFcommentNiceNameLookup[$shortname]) ? $VQFcommentNiceNameLookup[$shortname] : $shortname); 0158 } 0159 0160 }