1<?php 2 3///////////////////////////////////////////////////////////////// 4/// getID3() by James Heinrich <info@getid3.org> // 5// available at https://github.com/JamesHeinrich/getID3 // 6// or https://www.getid3.org // 7// or http://getid3.sourceforge.net // 8// see readme.txt for more details // 9///////////////////////////////////////////////////////////////// 10// // 11// module.audio.shorten.php // 12// module for analyzing Shorten Audio files // 13// dependencies: NONE // 14// /// 15///////////////////////////////////////////////////////////////// 16 17if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers 18 exit; 19} 20 21class getid3_shorten extends getid3_handler 22{ 23 /** 24 * @return bool 25 */ 26 public function Analyze() { 27 $info = &$this->getid3->info; 28 29 $this->fseek($info['avdataoffset']); 30 31 $ShortenHeader = $this->fread(8); 32 $magic = 'ajkg'; 33 if (substr($ShortenHeader, 0, 4) != $magic) { 34 $this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes(substr($ShortenHeader, 0, 4)).'"'); 35 return false; 36 } 37 $info['fileformat'] = 'shn'; 38 $info['audio']['dataformat'] = 'shn'; 39 $info['audio']['lossless'] = true; 40 $info['audio']['bitrate_mode'] = 'vbr'; 41 42 $info['shn']['version'] = getid3_lib::LittleEndian2Int(substr($ShortenHeader, 4, 1)); 43 44 $this->fseek($info['avdataend'] - 12); 45 $SeekTableSignatureTest = $this->fread(12); 46 $info['shn']['seektable']['present'] = substr($SeekTableSignatureTest, 4, 8) == 'SHNAMPSK'; 47 if ($info['shn']['seektable']['present']) { 48 $info['shn']['seektable']['length'] = getid3_lib::LittleEndian2Int(substr($SeekTableSignatureTest, 0, 4)); 49 $info['shn']['seektable']['offset'] = $info['avdataend'] - $info['shn']['seektable']['length']; 50 $this->fseek($info['shn']['seektable']['offset']); 51 $SeekTableMagic = $this->fread(4); 52 $magic = 'SEEK'; 53 if ($SeekTableMagic != $magic) { 54 55 $this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['shn']['seektable']['offset'].', found "'.getid3_lib::PrintHexBytes($SeekTableMagic).'"'); 56 return false; 57 58 } else { 59 60 // typedef struct tag_TSeekEntry 61 // { 62 // unsigned long SampleNumber; 63 // unsigned long SHNFileByteOffset; 64 // unsigned long SHNLastBufferReadPosition; 65 // unsigned short SHNByteGet; 66 // unsigned short SHNBufferOffset; 67 // unsigned short SHNFileBitOffset; 68 // unsigned long SHNGBuffer; 69 // unsigned short SHNBitShift; 70 // long CBuf0[3]; 71 // long CBuf1[3]; 72 // long Offset0[4]; 73 // long Offset1[4]; 74 // }TSeekEntry; 75 76 $SeekTableData = $this->fread($info['shn']['seektable']['length'] - 16); 77 $info['shn']['seektable']['entry_count'] = floor(strlen($SeekTableData) / 80); 78 //$info['shn']['seektable']['entries'] = array(); 79 //$SeekTableOffset = 0; 80 //for ($i = 0; $i < $info['shn']['seektable']['entry_count']; $i++) { 81 // $SeekTableEntry['sample_number'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); 82 // $SeekTableOffset += 4; 83 // $SeekTableEntry['shn_file_byte_offset'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); 84 // $SeekTableOffset += 4; 85 // $SeekTableEntry['shn_last_buffer_read_position'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); 86 // $SeekTableOffset += 4; 87 // $SeekTableEntry['shn_byte_get'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 2)); 88 // $SeekTableOffset += 2; 89 // $SeekTableEntry['shn_buffer_offset'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 2)); 90 // $SeekTableOffset += 2; 91 // $SeekTableEntry['shn_file_bit_offset'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 2)); 92 // $SeekTableOffset += 2; 93 // $SeekTableEntry['shn_gbuffer'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); 94 // $SeekTableOffset += 4; 95 // $SeekTableEntry['shn_bit_shift'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 2)); 96 // $SeekTableOffset += 2; 97 // for ($j = 0; $j < 3; $j++) { 98 // $SeekTableEntry['cbuf0'][$j] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); 99 // $SeekTableOffset += 4; 100 // } 101 // for ($j = 0; $j < 3; $j++) { 102 // $SeekTableEntry['cbuf1'][$j] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); 103 // $SeekTableOffset += 4; 104 // } 105 // for ($j = 0; $j < 4; $j++) { 106 // $SeekTableEntry['offset0'][$j] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); 107 // $SeekTableOffset += 4; 108 // } 109 // for ($j = 0; $j < 4; $j++) { 110 // $SeekTableEntry['offset1'][$j] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); 111 // $SeekTableOffset += 4; 112 // } 113 // 114 // $info['shn']['seektable']['entries'][] = $SeekTableEntry; 115 //} 116 117 } 118 119 } 120 121 if (preg_match('#(1|ON)#i', ini_get('safe_mode'))) { 122 $this->error('PHP running in Safe Mode - backtick operator not available, cannot run shntool to analyze Shorten files'); 123 return false; 124 } 125 126 if (GETID3_OS_ISWINDOWS) { 127 128 $RequiredFiles = array('shorten.exe', 'cygwin1.dll', 'head.exe'); 129 foreach ($RequiredFiles as $required_file) { 130 if (!is_readable(GETID3_HELPERAPPSDIR.$required_file)) { 131 $this->error(GETID3_HELPERAPPSDIR.$required_file.' does not exist'); 132 return false; 133 } 134 } 135 $commandline = GETID3_HELPERAPPSDIR.'shorten.exe -x "'.$info['filenamepath'].'" - | '.GETID3_HELPERAPPSDIR.'head.exe -c 64'; 136 $commandline = str_replace('/', '\\', $commandline); 137 138 } else { 139 140 static $shorten_present; 141 if (!isset($shorten_present)) { 142 $shorten_present = file_exists('/usr/local/bin/shorten') || `which shorten`; 143 } 144 if (!$shorten_present) { 145 $this->error('shorten binary was not found in path or /usr/local/bin'); 146 return false; 147 } 148 $commandline = (file_exists('/usr/local/bin/shorten') ? '/usr/local/bin/' : '' ) . 'shorten -x '.escapeshellarg($info['filenamepath']).' - | head -c 64'; 149 150 } 151 152 $output = `$commandline`; 153 154 if (!empty($output) && (substr($output, 12, 4) == 'fmt ')) { 155 156 if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers 157 exit; 158 } 159 getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio-video.riff.php', __FILE__, true); 160 161 $fmt_size = getid3_lib::LittleEndian2Int(substr($output, 16, 4)); 162 $DecodedWAVFORMATEX = getid3_riff::parseWAVEFORMATex(substr($output, 20, $fmt_size)); 163 $info['audio']['channels'] = $DecodedWAVFORMATEX['channels']; 164 $info['audio']['bits_per_sample'] = $DecodedWAVFORMATEX['bits_per_sample']; 165 $info['audio']['sample_rate'] = $DecodedWAVFORMATEX['sample_rate']; 166 167 if (substr($output, 20 + $fmt_size, 4) == 'data') { 168 169 $info['playtime_seconds'] = getid3_lib::LittleEndian2Int(substr($output, 20 + 4 + $fmt_size, 4)) / $DecodedWAVFORMATEX['raw']['nAvgBytesPerSec']; 170 171 } else { 172 173 $this->error('shorten failed to decode DATA chunk to expected location, cannot determine playtime'); 174 return false; 175 176 } 177 178 $info['audio']['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) / $info['playtime_seconds']) * 8; 179 180 } else { 181 182 $this->error('shorten failed to decode file to WAV for parsing'); 183 return false; 184 185 } 186 187 return true; 188 } 189 190} 191