/** * @param type $startoffset * @param type $maxoffset * * @return bool */ public function ParseRIFF($startoffset, $maxoffset) { $info =& $this->getid3->info; $maxoffset = min($maxoffset, $info['avdataend']); $RIFFchunk = false; $FoundAllChunksWeNeed = false; if ($startoffset < 0 || !Helper::intValueSupported($startoffset)) { $info['warning'][] = 'Unable to ParseRIFF() at ' . $startoffset . ' because beyond ' . round(PHP_INT_MAX / 1073741824) . 'GB limit of PHP filesystem functions'; return false; } $max_usable_offset = min(PHP_INT_MAX - 1024, $maxoffset); if ($maxoffset > $max_usable_offset) { $info['warning'][] = 'ParseRIFF() may return incomplete data for chunk starting at ' . $startoffset . ' because beyond it extends to ' . $maxoffset . ', which is beyond the ' . round(PHP_INT_MAX / 1073741824) . 'GB limit of PHP filesystem functions'; } fseek($this->getid3->fp, $startoffset, SEEK_SET); while (ftell($this->getid3->fp) < $max_usable_offset) { $chunknamesize = fread($this->getid3->fp, 8); $chunkname = substr($chunknamesize, 0, 4); $chunksize = $this->EitherEndian2Int(substr($chunknamesize, 4, 4)); if (strlen($chunkname) < 4) { $info['error'][] = 'Expecting chunk name at offset ' . (ftell($this->getid3->fp) - 4) . ' but found nothing. Aborting RIFF parsing.'; break; } if ($chunksize == 0) { if ($chunkname == 'JUNK') { // we'll allow zero-size JUNK frames } else { $info['warning'][] = 'Chunk size at offset ' . (ftell($this->getid3->fp) - 4) . ' is zero. Aborting RIFF parsing.'; break; } } if ($chunksize % 2 != 0) { // all structures are packed on word boundaries ++$chunksize; } switch ($chunkname) { case 'LIST': $listname = fread($this->getid3->fp, 4); if (preg_match('#^(movi|rec )$#i', $listname)) { $RIFFchunk[$listname]['offset'] = ftell($this->getid3->fp) - 4; $RIFFchunk[$listname]['size'] = $chunksize; if ($FoundAllChunksWeNeed) { // skip over } else { $WhereWeWere = ftell($this->getid3->fp); $AudioChunkHeader = fread($this->getid3->fp, 12); $AudioChunkStreamNum = substr($AudioChunkHeader, 0, 2); $AudioChunkStreamType = substr($AudioChunkHeader, 2, 2); $AudioChunkSize = Helper::LittleEndian2Int(substr($AudioChunkHeader, 4, 4)); if ($AudioChunkStreamType == 'wb') { $FirstFourBytes = substr($AudioChunkHeader, 8, 4); if (preg_match('/^\\xFF[\\xE2-\\xE7\\xF2-\\xF7\\xFA-\\xFF][\\x00-\\xEB]/s', $FirstFourBytes)) { // MP3 if (Mp3::MPEGaudioHeaderBytesValid($FirstFourBytes)) { $getid3_temp = new GetId3Core(); $getid3_temp->openfile($this->getid3->filename); $getid3_temp->info['avdataoffset'] = ftell($this->getid3->fp) - 4; $getid3_temp->info['avdataend'] = ftell($this->getid3->fp) + $AudioChunkSize; $getid3_mp3 = new Mp3($getid3_temp); $getid3_mp3->getOnlyMPEGaudioInfo($getid3_temp->info['avdataoffset'], false); if (isset($getid3_temp->info['mpeg']['audio'])) { $info['mpeg']['audio'] = $getid3_temp->info['mpeg']['audio']; $info['audio'] = $getid3_temp->info['audio']; $info['audio']['dataformat'] = 'mp' . $info['mpeg']['audio']['layer']; $info['audio']['sample_rate'] = $info['mpeg']['audio']['sample_rate']; $info['audio']['channels'] = $info['mpeg']['audio']['channels']; $info['audio']['bitrate'] = $info['mpeg']['audio']['bitrate']; $info['audio']['bitrate_mode'] = strtolower($info['mpeg']['audio']['bitrate_mode']); //$info['bitrate'] = $info['audio']['bitrate']; } unset($getid3_temp, $getid3_mp3); } } elseif (preg_match('/^\\x0B\\x77/s', $FirstFourBytes)) { // AC3 if (class_exists('Helpers\\GetId3\\Module\\Audio\\Ac3')) { $getid3_temp = new GetId3Core(); $getid3_temp->openfile($this->getid3->filename); $getid3_temp->info['avdataoffset'] = ftell($this->getid3->fp) - 4; $getid3_temp->info['avdataend'] = ftell($this->getid3->fp) + $AudioChunkSize; $getid3_ac3 = new Ac3($getid3_temp); $getid3_ac3->analyze(); if (empty($getid3_temp->info['error'])) { $info['audio'] = $getid3_temp->info['audio']; $info['ac3'] = $getid3_temp->info['ac3']; if (!empty($getid3_temp->info['warning'])) { foreach ($getid3_temp->info['warning'] as $key => $value) { $info['warning'][] = $value; } } } unset($getid3_temp, $getid3_ac3); } } } $FoundAllChunksWeNeed = true; fseek($this->getid3->fp, $WhereWeWere, SEEK_SET); } fseek($this->getid3->fp, $chunksize - 4, SEEK_CUR); //} elseif (preg_match('#^[0-9]{2}(wb|pc|dc|db)$#i', $listname)) { // // // data chunk, ignore // } else { if (!isset($RIFFchunk[$listname])) { $RIFFchunk[$listname] = array(); } $LISTchunkParent = $listname; $LISTchunkMaxOffset = ftell($this->getid3->fp) - 4 + $chunksize; if ($parsedChunk = $this->ParseRIFF(ftell($this->getid3->fp), ftell($this->getid3->fp) + $chunksize - 4)) { $RIFFchunk[$listname] = array_merge_recursive($RIFFchunk[$listname], $parsedChunk); } } break; default: if (preg_match('#^[0-9]{2}(wb|pc|dc|db)$#', $chunkname)) { $nextoffset = ftell($this->getid3->fp) + $chunksize; if ($nextoffset < 0 || !Helper::intValueSupported($nextoffset)) { $info['warning'][] = 'Unable to parse chunk at offset ' . $nextoffset . ' because beyond ' . round(PHP_INT_MAX / 1073741824) . 'GB limit of PHP filesystem functions'; break 2; } fseek($this->getid3->fp, $nextoffset, SEEK_SET); break; } $thisindex = 0; if (isset($RIFFchunk[$chunkname]) && is_array($RIFFchunk[$chunkname])) { $thisindex = count($RIFFchunk[$chunkname]); } $RIFFchunk[$chunkname][$thisindex]['offset'] = ftell($this->getid3->fp) - 8; $RIFFchunk[$chunkname][$thisindex]['size'] = $chunksize; switch ($chunkname) { case 'data': $info['avdataoffset'] = ftell($this->getid3->fp); $info['avdataend'] = $info['avdataoffset'] + $chunksize; $RIFFdataChunkContentsTest = fread($this->getid3->fp, 36); if (strlen($RIFFdataChunkContentsTest) > 0 && preg_match('/^\\xFF[\\xE2-\\xE7\\xF2-\\xF7\\xFA-\\xFF][\\x00-\\xEB]/s', substr($RIFFdataChunkContentsTest, 0, 4))) { // Probably is MP3 data if (Mp3::MPEGaudioHeaderBytesValid(substr($RIFFdataChunkContentsTest, 0, 4))) { $getid3_temp = new GetId3Core(); $getid3_temp->openfile($this->getid3->filename); $getid3_temp->info['avdataoffset'] = $RIFFchunk[$chunkname][$thisindex]['offset']; $getid3_temp->info['avdataend'] = $RIFFchunk[$chunkname][$thisindex]['offset'] + $RIFFchunk[$chunkname][$thisindex]['size']; $getid3_mp3 = new Mp3($getid3_temp); $getid3_mp3->getOnlyMPEGaudioInfo($RIFFchunk[$chunkname][$thisindex]['offset'], false); if (empty($getid3_temp->info['error'])) { $info['mpeg'] = $getid3_temp->info['mpeg']; $info['audio'] = $getid3_temp->info['audio']; } unset($getid3_temp, $getid3_mp3); } } elseif (strlen($RIFFdataChunkContentsTest) > 0 && substr($RIFFdataChunkContentsTest, 0, 2) == "\vw") { // This is probably AC-3 data if (class_exists('Helpers\\GetId3\\Module\\Audio\\Ac3')) { $getid3_temp = new GetId3Core(); $getid3_temp->openfile($this->getid3->filename); $getid3_temp->info['avdataoffset'] = $RIFFchunk[$chunkname][$thisindex]['offset']; $getid3_temp->info['avdataend'] = $RIFFchunk[$chunkname][$thisindex]['offset'] + $RIFFchunk[$chunkname][$thisindex]['size']; $getid3_ac3 = new Ac3($getid3_temp); $getid3_ac3->analyze(); if (empty($getid3_temp->info['error'])) { $info['audio'] = $getid3_temp->info['audio']; $info['ac3'] = $getid3_temp->info['ac3']; $info['warning'] = $getid3_temp->info['warning']; } unset($getid3_temp, $getid3_ac3); } } elseif (strlen($RIFFdataChunkContentsTest) > 0 && substr($RIFFdataChunkContentsTest, 8, 2) == "w\v") { // Dolby Digital WAV // AC-3 content, but not encoded in same format as normal AC-3 file // For one thing, byte order is swapped if (class_exists('Helpers\\GetId3\\Module\\Audio\\Ac3')) { // ok to use tmpfile here - only 56 bytes if ($RIFFtempfilename = tempnam(GetId3Core::getTempDir(), 'id3')) { if ($fd_temp = fopen($RIFFtempfilename, 'wb')) { for ($i = 0; $i < 28; $i += 2) { // swap byte order fwrite($fd_temp, substr($RIFFdataChunkContentsTest, 8 + $i + 1, 1)); fwrite($fd_temp, substr($RIFFdataChunkContentsTest, 8 + $i + 0, 1)); } fclose($fd_temp); $getid3_temp = new GetId3Core(); $getid3_temp->openfile($RIFFtempfilename); $getid3_temp->info['avdataend'] = 20; $getid3_ac3 = new Ac3($getid3_temp); $getid3_ac3->analyze(); if (empty($getid3_temp->info['error'])) { $info['audio'] = $getid3_temp->info['audio']; $info['ac3'] = $getid3_temp->info['ac3']; $info['warning'] = $getid3_temp->info['warning']; } else { $info['error'][] = 'Error parsing Dolby Digital WAV (AC3-in-RIFF): ' . implode(';', $getid3_temp->info['error']); } unset($getid3_ac3, $getid3_temp); } else { $info['error'][] = 'Error parsing Dolby Digital WAV (AC3-in-RIFF): failed to write temp file'; } unlink($RIFFtempfilename); } else { $info['error'][] = 'Error parsing Dolby Digital WAV (AC3-in-RIFF): failed to write temp file'; } } } elseif (strlen($RIFFdataChunkContentsTest) > 0 && substr($RIFFdataChunkContentsTest, 0, 4) == 'wvpk') { // This is WavPack data $info['wavpack']['offset'] = $RIFFchunk[$chunkname][$thisindex]['offset']; $info['wavpack']['size'] = Helper::LittleEndian2Int(substr($RIFFdataChunkContentsTest, 4, 4)); $this->RIFFparseWavPackHeader(substr($RIFFdataChunkContentsTest, 8, 28)); } else { // This is some other kind of data (quite possibly just PCM) // do nothing special, just skip it } $nextoffset = $RIFFchunk[$chunkname][$thisindex]['offset'] + 8 + $chunksize; if ($nextoffset < 0 || !Helper::intValueSupported($nextoffset)) { $info['warning'][] = 'Unable to parse chunk at offset ' . $nextoffset . ' because beyond ' . round(PHP_INT_MAX / 1073741824) . 'GB limit of PHP filesystem functions'; break 3; } fseek($this->getid3->fp, $RIFFchunk[$chunkname][$thisindex]['offset'] + 8 + $chunksize, SEEK_SET); break; case 'iXML': case 'bext': case 'cart': case 'fmt ': case 'strh': case 'strf': case 'indx': case 'MEXT': case 'DISP': // always read data in // always read data in case 'JUNK': // should be: never read data in // but some programs write their version strings in a JUNK chunk (e.g. VirtualDub, AVIdemux, etc) if ($chunksize < 1048576) { if ($chunksize > 0) { $RIFFchunk[$chunkname][$thisindex]['data'] = fread($this->getid3->fp, $chunksize); if ($chunkname == 'JUNK') { if (preg_match('#^([\\x20-\\x7F]+)#', $RIFFchunk[$chunkname][$thisindex]['data'], $matches)) { // only keep text characters [chr(32)-chr(127)] $info['riff']['comments']['junk'][] = trim($matches[1]); } // but if nothing there, ignore // remove the key in either case unset($RIFFchunk[$chunkname][$thisindex]['data']); } } } else { $info['warning'][] = 'chunk "' . $chunkname . '" at offset ' . ftell($this->getid3->fp) . ' is unexpectedly larger than 1MB (claims to be ' . number_format($chunksize) . ' bytes), skipping data'; $nextoffset = ftell($this->getid3->fp) + $chunksize; if ($nextoffset < 0 || !Helper::intValueSupported($nextoffset)) { $info['warning'][] = 'Unable to parse chunk at offset ' . $nextoffset . ' because beyond ' . round(PHP_INT_MAX / 1073741824) . 'GB limit of PHP filesystem functions'; break 3; } fseek($this->getid3->fp, $nextoffset, SEEK_SET); } break; default: if (!preg_match('#^[0-9]{2}(wb|pc|dc|db)$#', $chunkname) && !empty($LISTchunkParent) && $RIFFchunk[$chunkname][$thisindex]['offset'] + $RIFFchunk[$chunkname][$thisindex]['size'] <= $LISTchunkMaxOffset) { $RIFFchunk[$LISTchunkParent][$chunkname][$thisindex]['offset'] = $RIFFchunk[$chunkname][$thisindex]['offset']; $RIFFchunk[$LISTchunkParent][$chunkname][$thisindex]['size'] = $RIFFchunk[$chunkname][$thisindex]['size']; unset($RIFFchunk[$chunkname][$thisindex]['offset']); unset($RIFFchunk[$chunkname][$thisindex]['size']); if (isset($RIFFchunk[$chunkname][$thisindex]) && empty($RIFFchunk[$chunkname][$thisindex])) { unset($RIFFchunk[$chunkname][$thisindex]); } if (isset($RIFFchunk[$chunkname]) && empty($RIFFchunk[$chunkname])) { unset($RIFFchunk[$chunkname]); } $RIFFchunk[$LISTchunkParent][$chunkname][$thisindex]['data'] = fread($this->getid3->fp, $chunksize); //} elseif (in_array($chunkname, array('ID3 ')) || (($chunksize > 0) && ($chunksize < 2048))) { } elseif ($chunksize > 0 && $chunksize < 2048) { // only read data in if smaller than 2kB $RIFFchunk[$chunkname][$thisindex]['data'] = fread($this->getid3->fp, $chunksize); } else { $nextoffset = ftell($this->getid3->fp) + $chunksize; if ($nextoffset < 0 || !Helper::intValueSupported($nextoffset)) { $info['warning'][] = 'Unable to parse chunk at offset ' . $nextoffset . ' because beyond ' . round(PHP_INT_MAX / 1073741824) . 'GB limit of PHP filesystem functions'; break 3; } fseek($this->getid3->fp, $nextoffset, SEEK_SET); } break; } break; } } return $RIFFchunk; }