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;
}
}
}
