File indexing completed on 2024-05-12 05:58:14
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.shorten.php // 0012 // module for analyzing Shorten Audio files // 0013 // dependencies: NONE // 0014 // /// 0015 ///////////////////////////////////////////////////////////////// 0016 0017 0018 class getid3_shorten extends getid3_handler 0019 { 0020 0021 public function Analyze() { 0022 $info = &$this->getid3->info; 0023 0024 $this->fseek($info['avdataoffset']); 0025 0026 $ShortenHeader = $this->fread(8); 0027 $magic = 'ajkg'; 0028 if (substr($ShortenHeader, 0, 4) != $magic) { 0029 $info['error'][] = 'Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes(substr($ShortenHeader, 0, 4)).'"'; 0030 return false; 0031 } 0032 $info['fileformat'] = 'shn'; 0033 $info['audio']['dataformat'] = 'shn'; 0034 $info['audio']['lossless'] = true; 0035 $info['audio']['bitrate_mode'] = 'vbr'; 0036 0037 $info['shn']['version'] = getid3_lib::LittleEndian2Int(substr($ShortenHeader, 4, 1)); 0038 0039 $this->fseek($info['avdataend'] - 12); 0040 $SeekTableSignatureTest = $this->fread(12); 0041 $info['shn']['seektable']['present'] = (bool) (substr($SeekTableSignatureTest, 4, 8) == 'SHNAMPSK'); 0042 if ($info['shn']['seektable']['present']) { 0043 $info['shn']['seektable']['length'] = getid3_lib::LittleEndian2Int(substr($SeekTableSignatureTest, 0, 4)); 0044 $info['shn']['seektable']['offset'] = $info['avdataend'] - $info['shn']['seektable']['length']; 0045 $this->fseek($info['shn']['seektable']['offset']); 0046 $SeekTableMagic = $this->fread(4); 0047 $magic = 'SEEK'; 0048 if ($SeekTableMagic != $magic) { 0049 0050 $info['error'][] = 'Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['shn']['seektable']['offset'].', found "'.getid3_lib::PrintHexBytes($SeekTableMagic).'"'; 0051 return false; 0052 0053 } else { 0054 0055 // typedef struct tag_TSeekEntry 0056 // { 0057 // unsigned long SampleNumber; 0058 // unsigned long SHNFileByteOffset; 0059 // unsigned long SHNLastBufferReadPosition; 0060 // unsigned short SHNByteGet; 0061 // unsigned short SHNBufferOffset; 0062 // unsigned short SHNFileBitOffset; 0063 // unsigned long SHNGBuffer; 0064 // unsigned short SHNBitShift; 0065 // long CBuf0[3]; 0066 // long CBuf1[3]; 0067 // long Offset0[4]; 0068 // long Offset1[4]; 0069 // }TSeekEntry; 0070 0071 $SeekTableData = $this->fread($info['shn']['seektable']['length'] - 16); 0072 $info['shn']['seektable']['entry_count'] = floor(strlen($SeekTableData) / 80); 0073 //$info['shn']['seektable']['entries'] = array(); 0074 //$SeekTableOffset = 0; 0075 //for ($i = 0; $i < $info['shn']['seektable']['entry_count']; $i++) { 0076 // $SeekTableEntry['sample_number'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); 0077 // $SeekTableOffset += 4; 0078 // $SeekTableEntry['shn_file_byte_offset'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); 0079 // $SeekTableOffset += 4; 0080 // $SeekTableEntry['shn_last_buffer_read_position'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); 0081 // $SeekTableOffset += 4; 0082 // $SeekTableEntry['shn_byte_get'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 2)); 0083 // $SeekTableOffset += 2; 0084 // $SeekTableEntry['shn_buffer_offset'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 2)); 0085 // $SeekTableOffset += 2; 0086 // $SeekTableEntry['shn_file_bit_offset'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 2)); 0087 // $SeekTableOffset += 2; 0088 // $SeekTableEntry['shn_gbuffer'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); 0089 // $SeekTableOffset += 4; 0090 // $SeekTableEntry['shn_bit_shift'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 2)); 0091 // $SeekTableOffset += 2; 0092 // for ($j = 0; $j < 3; $j++) { 0093 // $SeekTableEntry['cbuf0'][$j] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); 0094 // $SeekTableOffset += 4; 0095 // } 0096 // for ($j = 0; $j < 3; $j++) { 0097 // $SeekTableEntry['cbuf1'][$j] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); 0098 // $SeekTableOffset += 4; 0099 // } 0100 // for ($j = 0; $j < 4; $j++) { 0101 // $SeekTableEntry['offset0'][$j] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); 0102 // $SeekTableOffset += 4; 0103 // } 0104 // for ($j = 0; $j < 4; $j++) { 0105 // $SeekTableEntry['offset1'][$j] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); 0106 // $SeekTableOffset += 4; 0107 // } 0108 // 0109 // $info['shn']['seektable']['entries'][] = $SeekTableEntry; 0110 //} 0111 0112 } 0113 0114 } 0115 0116 if (preg_match('#(1|ON)#i', ini_get('safe_mode'))) { 0117 $info['error'][] = 'PHP running in Safe Mode - backtick operator not available, cannot run shntool to analyze Shorten files'; 0118 return false; 0119 } 0120 0121 if (GETID3_OS_ISWINDOWS) { 0122 0123 $RequiredFiles = array('shorten.exe', 'cygwin1.dll', 'head.exe'); 0124 foreach ($RequiredFiles as $required_file) { 0125 if (!is_readable(GETID3_HELPERAPPSDIR.$required_file)) { 0126 $info['error'][] = GETID3_HELPERAPPSDIR.$required_file.' does not exist'; 0127 return false; 0128 } 0129 } 0130 $commandline = GETID3_HELPERAPPSDIR.'shorten.exe -x "'.$info['filenamepath'].'" - | '.GETID3_HELPERAPPSDIR.'head.exe -c 64'; 0131 $commandline = str_replace('/', '\\', $commandline); 0132 0133 } else { 0134 0135 static $shorten_present; 0136 if (!isset($shorten_present)) { 0137 $shorten_present = file_exists('/usr/local/bin/shorten') || `which shorten`; 0138 } 0139 if (!$shorten_present) { 0140 $info['error'][] = 'shorten binary was not found in path or /usr/local/bin'; 0141 return false; 0142 } 0143 $commandline = (file_exists('/usr/local/bin/shorten') ? '/usr/local/bin/' : '' ) . 'shorten -x '.escapeshellarg($info['filenamepath']).' - | head -c 64'; 0144 0145 } 0146 0147 $output = `$commandline`; 0148 0149 if (!empty($output) && (substr($output, 12, 4) == 'fmt ')) { 0150 0151 getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio-video.riff.php', __FILE__, true); 0152 0153 $fmt_size = getid3_lib::LittleEndian2Int(substr($output, 16, 4)); 0154 $DecodedWAVFORMATEX = getid3_riff::parseWAVEFORMATex(substr($output, 20, $fmt_size)); 0155 $info['audio']['channels'] = $DecodedWAVFORMATEX['channels']; 0156 $info['audio']['bits_per_sample'] = $DecodedWAVFORMATEX['bits_per_sample']; 0157 $info['audio']['sample_rate'] = $DecodedWAVFORMATEX['sample_rate']; 0158 0159 if (substr($output, 20 + $fmt_size, 4) == 'data') { 0160 0161 $info['playtime_seconds'] = getid3_lib::LittleEndian2Int(substr($output, 20 + 4 + $fmt_size, 4)) / $DecodedWAVFORMATEX['raw']['nAvgBytesPerSec']; 0162 0163 } else { 0164 0165 $info['error'][] = 'shorten failed to decode DATA chunk to expected location, cannot determine playtime'; 0166 return false; 0167 0168 } 0169 0170 $info['audio']['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) / $info['playtime_seconds']) * 8; 0171 0172 } else { 0173 0174 $info['error'][] = 'shorten failed to decode file to WAV for parsing'; 0175 return false; 0176 0177 } 0178 0179 return true; 0180 } 0181 0182 }