File indexing completed on 2024-05-12 05:58:12
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.nsv.php // 0012 // module for analyzing Nullsoft NSV files // 0013 // dependencies: NONE // 0014 // /// 0015 ///////////////////////////////////////////////////////////////// 0016 0017 0018 class getid3_nsv extends getid3_handler 0019 { 0020 0021 public function Analyze() { 0022 $info = &$this->getid3->info; 0023 0024 $this->fseek($info['avdataoffset']); 0025 $NSVheader = $this->fread(4); 0026 0027 switch ($NSVheader) { 0028 case 'NSVs': 0029 if ($this->getNSVsHeaderFilepointer(0)) { 0030 $info['fileformat'] = 'nsv'; 0031 $info['audio']['dataformat'] = 'nsv'; 0032 $info['video']['dataformat'] = 'nsv'; 0033 $info['audio']['lossless'] = false; 0034 $info['video']['lossless'] = false; 0035 } 0036 break; 0037 0038 case 'NSVf': 0039 if ($this->getNSVfHeaderFilepointer(0)) { 0040 $info['fileformat'] = 'nsv'; 0041 $info['audio']['dataformat'] = 'nsv'; 0042 $info['video']['dataformat'] = 'nsv'; 0043 $info['audio']['lossless'] = false; 0044 $info['video']['lossless'] = false; 0045 $this->getNSVsHeaderFilepointer($info['nsv']['NSVf']['header_length']); 0046 } 0047 break; 0048 0049 default: 0050 $info['error'][] = 'Expecting "NSVs" or "NSVf" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($NSVheader).'"'; 0051 return false; 0052 break; 0053 } 0054 0055 if (!isset($info['nsv']['NSVf'])) { 0056 $info['warning'][] = 'NSVf header not present - cannot calculate playtime or bitrate'; 0057 } 0058 0059 return true; 0060 } 0061 0062 public function getNSVsHeaderFilepointer($fileoffset) { 0063 $info = &$this->getid3->info; 0064 $this->fseek($fileoffset); 0065 $NSVsheader = $this->fread(28); 0066 $offset = 0; 0067 0068 $info['nsv']['NSVs']['identifier'] = substr($NSVsheader, $offset, 4); 0069 $offset += 4; 0070 0071 if ($info['nsv']['NSVs']['identifier'] != 'NSVs') { 0072 $info['error'][] = 'expected "NSVs" at offset ('.$fileoffset.'), found "'.$info['nsv']['NSVs']['identifier'].'" instead'; 0073 unset($info['nsv']['NSVs']); 0074 return false; 0075 } 0076 0077 $info['nsv']['NSVs']['offset'] = $fileoffset; 0078 0079 $info['nsv']['NSVs']['video_codec'] = substr($NSVsheader, $offset, 4); 0080 $offset += 4; 0081 $info['nsv']['NSVs']['audio_codec'] = substr($NSVsheader, $offset, 4); 0082 $offset += 4; 0083 $info['nsv']['NSVs']['resolution_x'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 2)); 0084 $offset += 2; 0085 $info['nsv']['NSVs']['resolution_y'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 2)); 0086 $offset += 2; 0087 0088 $info['nsv']['NSVs']['framerate_index'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1)); 0089 $offset += 1; 0090 //$info['nsv']['NSVs']['unknown1b'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1)); 0091 $offset += 1; 0092 //$info['nsv']['NSVs']['unknown1c'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1)); 0093 $offset += 1; 0094 //$info['nsv']['NSVs']['unknown1d'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1)); 0095 $offset += 1; 0096 //$info['nsv']['NSVs']['unknown2a'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1)); 0097 $offset += 1; 0098 //$info['nsv']['NSVs']['unknown2b'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1)); 0099 $offset += 1; 0100 //$info['nsv']['NSVs']['unknown2c'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1)); 0101 $offset += 1; 0102 //$info['nsv']['NSVs']['unknown2d'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1)); 0103 $offset += 1; 0104 0105 switch ($info['nsv']['NSVs']['audio_codec']) { 0106 case 'PCM ': 0107 $info['nsv']['NSVs']['bits_channel'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1)); 0108 $offset += 1; 0109 $info['nsv']['NSVs']['channels'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1)); 0110 $offset += 1; 0111 $info['nsv']['NSVs']['sample_rate'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 2)); 0112 $offset += 2; 0113 0114 $info['audio']['sample_rate'] = $info['nsv']['NSVs']['sample_rate']; 0115 break; 0116 0117 case 'MP3 ': 0118 case 'NONE': 0119 default: 0120 //$info['nsv']['NSVs']['unknown3'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 4)); 0121 $offset += 4; 0122 break; 0123 } 0124 0125 $info['video']['resolution_x'] = $info['nsv']['NSVs']['resolution_x']; 0126 $info['video']['resolution_y'] = $info['nsv']['NSVs']['resolution_y']; 0127 $info['nsv']['NSVs']['frame_rate'] = $this->NSVframerateLookup($info['nsv']['NSVs']['framerate_index']); 0128 $info['video']['frame_rate'] = $info['nsv']['NSVs']['frame_rate']; 0129 $info['video']['bits_per_sample'] = 24; 0130 $info['video']['pixel_aspect_ratio'] = (float) 1; 0131 0132 return true; 0133 } 0134 0135 public function getNSVfHeaderFilepointer($fileoffset, $getTOCoffsets=false) { 0136 $info = &$this->getid3->info; 0137 $this->fseek($fileoffset); 0138 $NSVfheader = $this->fread(28); 0139 $offset = 0; 0140 0141 $info['nsv']['NSVf']['identifier'] = substr($NSVfheader, $offset, 4); 0142 $offset += 4; 0143 0144 if ($info['nsv']['NSVf']['identifier'] != 'NSVf') { 0145 $info['error'][] = 'expected "NSVf" at offset ('.$fileoffset.'), found "'.$info['nsv']['NSVf']['identifier'].'" instead'; 0146 unset($info['nsv']['NSVf']); 0147 return false; 0148 } 0149 0150 $info['nsv']['NSVs']['offset'] = $fileoffset; 0151 0152 $info['nsv']['NSVf']['header_length'] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4)); 0153 $offset += 4; 0154 $info['nsv']['NSVf']['file_size'] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4)); 0155 $offset += 4; 0156 0157 if ($info['nsv']['NSVf']['file_size'] > $info['avdataend']) { 0158 $info['warning'][] = 'truncated file - NSVf header indicates '.$info['nsv']['NSVf']['file_size'].' bytes, file actually '.$info['avdataend'].' bytes'; 0159 } 0160 0161 $info['nsv']['NSVf']['playtime_ms'] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4)); 0162 $offset += 4; 0163 $info['nsv']['NSVf']['meta_size'] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4)); 0164 $offset += 4; 0165 $info['nsv']['NSVf']['TOC_entries_1'] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4)); 0166 $offset += 4; 0167 $info['nsv']['NSVf']['TOC_entries_2'] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4)); 0168 $offset += 4; 0169 0170 if ($info['nsv']['NSVf']['playtime_ms'] == 0) { 0171 $info['error'][] = 'Corrupt NSV file: NSVf.playtime_ms == zero'; 0172 return false; 0173 } 0174 0175 $NSVfheader .= $this->fread($info['nsv']['NSVf']['meta_size'] + (4 * $info['nsv']['NSVf']['TOC_entries_1']) + (4 * $info['nsv']['NSVf']['TOC_entries_2'])); 0176 $NSVfheaderlength = strlen($NSVfheader); 0177 $info['nsv']['NSVf']['metadata'] = substr($NSVfheader, $offset, $info['nsv']['NSVf']['meta_size']); 0178 $offset += $info['nsv']['NSVf']['meta_size']; 0179 0180 if ($getTOCoffsets) { 0181 $TOCcounter = 0; 0182 while ($TOCcounter < $info['nsv']['NSVf']['TOC_entries_1']) { 0183 if ($TOCcounter < $info['nsv']['NSVf']['TOC_entries_1']) { 0184 $info['nsv']['NSVf']['TOC_1'][$TOCcounter] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4)); 0185 $offset += 4; 0186 $TOCcounter++; 0187 } 0188 } 0189 } 0190 0191 if (trim($info['nsv']['NSVf']['metadata']) != '') { 0192 $info['nsv']['NSVf']['metadata'] = str_replace('`', "\x01", $info['nsv']['NSVf']['metadata']); 0193 $CommentPairArray = explode("\x01".' ', $info['nsv']['NSVf']['metadata']); 0194 foreach ($CommentPairArray as $CommentPair) { 0195 if (strstr($CommentPair, '='."\x01")) { 0196 list($key, $value) = explode('='."\x01", $CommentPair, 2); 0197 $info['nsv']['comments'][strtolower($key)][] = trim(str_replace("\x01", '', $value)); 0198 } 0199 } 0200 } 0201 0202 $info['playtime_seconds'] = $info['nsv']['NSVf']['playtime_ms'] / 1000; 0203 $info['bitrate'] = ($info['nsv']['NSVf']['file_size'] * 8) / $info['playtime_seconds']; 0204 0205 return true; 0206 } 0207 0208 0209 public static function NSVframerateLookup($framerateindex) { 0210 if ($framerateindex <= 127) { 0211 return (float) $framerateindex; 0212 } 0213 static $NSVframerateLookup = array(); 0214 if (empty($NSVframerateLookup)) { 0215 $NSVframerateLookup[129] = (float) 29.970; 0216 $NSVframerateLookup[131] = (float) 23.976; 0217 $NSVframerateLookup[133] = (float) 14.985; 0218 $NSVframerateLookup[197] = (float) 59.940; 0219 $NSVframerateLookup[199] = (float) 47.952; 0220 } 0221 return (isset($NSVframerateLookup[$framerateindex]) ? $NSVframerateLookup[$framerateindex] : false); 0222 } 0223 0224 }