function parse($swfdata) { $reader = new IO_Bit(); $reader->input($swfdata); $this->_swfdata = $swfdata; /* SWF Header */ $this->_headers['Signature'] = $reader->getData(3); $this->_headers['Version'] = $reader->getUI8(); $this->_headers['FileLength'] = $reader->getUI32LE(); if ($this->_headers['Signature'][0] == 'C') { // CWS の場合、FileLength の後ろが zlib 圧縮されている $uncompressed_data = gzuncompress(substr($swfdata, 8)); if ($uncompressed_data === false) { return false; } list($byte_offset, $dummy) = $reader->getOffset(); $reader->setOffset(0, 0); $swfdata = $reader->getData($byte_offset) . $uncompressed_data; $reader = new IO_Bit(); $reader->input($swfdata); $this->_swfdata = $swfdata; $reader->setOffset($byte_offset, 0); } /* SWF Movie Header */ $this->_headers['FrameSize'] = IO_SWF_Type_RECT::parse($reader); $reader->byteAlign(); $this->_headers['FrameRate'] = $reader->getUI16LE(); $this->_headers['FrameCount'] = $reader->getUI16LE(); list($this->_header_size, $dummy) = $reader->getOffset(); /* SWF Tags */ while (true) { $swfInfo = array('Version' => $this->_headers['Version']); $tag = new IO_SWF_Tag($swfInfo); $tag->parse($reader); $this->_tags[] = $tag; if ($tag->code == 0) { // END Tag break; } } return true; }
function _splitChunk($eoiFinish = true, $sosScan = true) { $bitin = new IO_Bit(); $bitin->input($this->_jpegdata); while ($bitin->hasNextData()) { $marker1 = $bitin->getUI8(); if ($marker1 != 0xff) { fprintf(STDERR, "dumpChunk: marker1=0x%02X", $marker1); return false; } $marker2 = $bitin->getUI8(); switch ($marker2) { case 0xd8: // SOI (Start of Image) $this->_jpegChunk[] = array('marker' => $marker2, 'data' => null, 'length' => null); continue; case 0xd9: // EOI (End of Image) $this->_jpegChunk[] = array('marker' => $marker2, 'data' => null, 'length' => null); if ($eoiFinish) { break 2; // while break; } continue; case 0xda: // SOS if ($sosScan === false) { $remainData = $bitin->getDataUntil(false); $this->_jpegChunk[] = array('marker' => $marker2, 'data' => $remainData, 'length' => null); break 2; // while break; } case 0xd0: case 0xd1: case 0xd2: case 0xd3: // RST // RST case 0xd4: case 0xd5: case 0xd6: case 0xd7: // RST list($chunk_data_offset, $dummy) = $bitin->getOffset(); while (true) { $next_marker1 = $bitin->getUI8(); if ($next_marker1 != 0xff) { continue; } $next_marker2 = $bitin->getUI8(); if ($next_marker2 == 0x0) { continue; } $bitin->incrementOffset(-2, 0); // back from next marker list($next_chunk_offset, $dummy) = $bitin->getOffset(); $length = $next_chunk_offset - $chunk_data_offset; $bitin->setOffset($chunk_data_offset, 0); $this->_jpegChunk[] = array('marker' => $marker2, 'data' => $bitin->getData($length), 'length' => null); break; } break; default: $length = $bitin->getUI16BE(); $this->_jpegChunk[] = array('marker' => $marker2, 'data' => $bitin->getData($length - 2), 'length' => $length); continue; } } }