diff options
Diffstat (limited to 'includes/getid3/module.audio.shorten.php')
| -rw-r--r-- | includes/getid3/module.audio.shorten.php | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/includes/getid3/module.audio.shorten.php b/includes/getid3/module.audio.shorten.php new file mode 100644 index 0000000..533208f --- /dev/null +++ b/includes/getid3/module.audio.shorten.php @@ -0,0 +1,189 @@ +<?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.shorten.php // +// module for analyzing Shorten Audio files // +// dependencies: NONE // +// /// +///////////////////////////////////////////////////////////////// + +if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers + exit; +} +class getid3_shorten extends getid3_handler +{ + /** + * @return bool + */ + public function Analyze() { + $info = &$this->getid3->info; + + $this->fseek($info['avdataoffset']); + + $ShortenHeader = $this->fread(8); + $magic = 'ajkg'; + if (substr($ShortenHeader, 0, 4) != $magic) { + $this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes(substr($ShortenHeader, 0, 4)).'"'); + return false; + } + $info['fileformat'] = 'shn'; + $info['audio']['dataformat'] = 'shn'; + $info['audio']['lossless'] = true; + $info['audio']['bitrate_mode'] = 'vbr'; + + $info['shn']['version'] = getid3_lib::LittleEndian2Int(substr($ShortenHeader, 4, 1)); + + $this->fseek($info['avdataend'] - 12); + $SeekTableSignatureTest = $this->fread(12); + $info['shn']['seektable']['present'] = substr($SeekTableSignatureTest, 4, 8) == 'SHNAMPSK'; + if ($info['shn']['seektable']['present']) { + $info['shn']['seektable']['length'] = getid3_lib::LittleEndian2Int(substr($SeekTableSignatureTest, 0, 4)); + $info['shn']['seektable']['offset'] = $info['avdataend'] - $info['shn']['seektable']['length']; + $this->fseek($info['shn']['seektable']['offset']); + $SeekTableMagic = $this->fread(4); + $magic = 'SEEK'; + if ($SeekTableMagic != $magic) { + + $this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['shn']['seektable']['offset'].', found "'.getid3_lib::PrintHexBytes($SeekTableMagic).'"'); + return false; + + } else { + + // typedef struct tag_TSeekEntry + // { + // unsigned long SampleNumber; + // unsigned long SHNFileByteOffset; + // unsigned long SHNLastBufferReadPosition; + // unsigned short SHNByteGet; + // unsigned short SHNBufferOffset; + // unsigned short SHNFileBitOffset; + // unsigned long SHNGBuffer; + // unsigned short SHNBitShift; + // long CBuf0[3]; + // long CBuf1[3]; + // long Offset0[4]; + // long Offset1[4]; + // }TSeekEntry; + + $SeekTableData = $this->fread($info['shn']['seektable']['length'] - 16); + $info['shn']['seektable']['entry_count'] = floor(strlen($SeekTableData) / 80); + //$info['shn']['seektable']['entries'] = array(); + //$SeekTableOffset = 0; + //for ($i = 0; $i < $info['shn']['seektable']['entry_count']; $i++) { + // $SeekTableEntry['sample_number'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); + // $SeekTableOffset += 4; + // $SeekTableEntry['shn_file_byte_offset'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); + // $SeekTableOffset += 4; + // $SeekTableEntry['shn_last_buffer_read_position'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); + // $SeekTableOffset += 4; + // $SeekTableEntry['shn_byte_get'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 2)); + // $SeekTableOffset += 2; + // $SeekTableEntry['shn_buffer_offset'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 2)); + // $SeekTableOffset += 2; + // $SeekTableEntry['shn_file_bit_offset'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 2)); + // $SeekTableOffset += 2; + // $SeekTableEntry['shn_gbuffer'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); + // $SeekTableOffset += 4; + // $SeekTableEntry['shn_bit_shift'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 2)); + // $SeekTableOffset += 2; + // for ($j = 0; $j < 3; $j++) { + // $SeekTableEntry['cbuf0'][$j] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); + // $SeekTableOffset += 4; + // } + // for ($j = 0; $j < 3; $j++) { + // $SeekTableEntry['cbuf1'][$j] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); + // $SeekTableOffset += 4; + // } + // for ($j = 0; $j < 4; $j++) { + // $SeekTableEntry['offset0'][$j] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); + // $SeekTableOffset += 4; + // } + // for ($j = 0; $j < 4; $j++) { + // $SeekTableEntry['offset1'][$j] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4)); + // $SeekTableOffset += 4; + // } + // + // $info['shn']['seektable']['entries'][] = $SeekTableEntry; + //} + + } + + } + + if (preg_match('#(1|ON)#i', ini_get('safe_mode'))) { + $this->error('PHP running in Safe Mode - backtick operator not available, cannot run shntool to analyze Shorten files'); + return false; + } + + if (GETID3_OS_ISWINDOWS) { + + $RequiredFiles = array('shorten.exe', 'cygwin1.dll', 'head.exe'); + foreach ($RequiredFiles as $required_file) { + if (!is_readable(GETID3_HELPERAPPSDIR.$required_file)) { + $this->error(GETID3_HELPERAPPSDIR.$required_file.' does not exist'); + return false; + } + } + $commandline = GETID3_HELPERAPPSDIR.'shorten.exe -x "'.$info['filenamepath'].'" - | '.GETID3_HELPERAPPSDIR.'head.exe -c 64'; + $commandline = str_replace('/', '\\', $commandline); + + } else { + + static $shorten_present; + if (!isset($shorten_present)) { + $shorten_present = file_exists('/usr/local/bin/shorten') || `which shorten`; + } + if (!$shorten_present) { + $this->error('shorten binary was not found in path or /usr/local/bin'); + return false; + } + $commandline = (file_exists('/usr/local/bin/shorten') ? '/usr/local/bin/' : '' ) . 'shorten -x '.escapeshellarg($info['filenamepath']).' - | head -c 64'; + + } + + $output = `$commandline`; + + if (!empty($output) && (substr($output, 12, 4) == 'fmt ')) { + + if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers + exit; + } + getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio-video.riff.php', __FILE__, true); + + $fmt_size = getid3_lib::LittleEndian2Int(substr($output, 16, 4)); + $DecodedWAVFORMATEX = getid3_riff::parseWAVEFORMATex(substr($output, 20, $fmt_size)); + $info['audio']['channels'] = $DecodedWAVFORMATEX['channels']; + $info['audio']['bits_per_sample'] = $DecodedWAVFORMATEX['bits_per_sample']; + $info['audio']['sample_rate'] = $DecodedWAVFORMATEX['sample_rate']; + + if (substr($output, 20 + $fmt_size, 4) == 'data') { + + $info['playtime_seconds'] = getid3_lib::LittleEndian2Int(substr($output, 20 + 4 + $fmt_size, 4)) / $DecodedWAVFORMATEX['raw']['nAvgBytesPerSec']; + + } else { + + $this->error('shorten failed to decode DATA chunk to expected location, cannot determine playtime'); + return false; + + } + + $info['audio']['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) / $info['playtime_seconds']) * 8; + + } else { + + $this->error('shorten failed to decode file to WAV for parsing'); + return false; + + } + + return true; + } + +} |