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' => $length);
continue;
}
}
}
function parse($mfidata)
{
$reader = new IO_Bit();
$reader->input($mfidata);
// Header Part
$identifier = $reader->getData(4);
if ($identifier != 'melo') {
throw new Exception('Identifer($identifier) is not melo');
}
$this->headers['Identifier'] = $identifier;
$fileLength = $reader->getUI32BE();
$realFileLength = strlen($mfidata);
if ($fileLength != $realFileLength - 8) {
throw new Exception("FileLength({$fileLength}) is not real FileLength({$realFileLength}) - 8");
}
$this->headers['FileLength'] = $fileLength;
$offsetToTrack = $reader->getUI16BE();
$this->headers['OffsetToTrack'] = $offsetToTrack;
$this->headers['DataTypeMajor'] = $reader->getUI8();
$this->headers['DataTypeMinor'] = $reader->getUI8();
$this->headers['NumberOfTrack'] = $reader->getUI8();
// Data Information Part
$reader_di = new IO_Bit();
$reader_di->input($reader->getData($offsetToTrack - 3));
$note_message_length_info = 0;
while ($reader_di->hasNextData(6)) {
$info = array();
$identifer = $reader_di->getData(4);
$length = $reader_di->getUI16BE();
$info['Identifer'] = $identifer;
$info['Length'] = $length;
switch ($identifer) {
case 'titl':
case 'copy':
case 'prot':
case 'date':
$data = $reader_di->getData($length);
break;
case 'sorc':
$data = $reader_di->getUI8($length);
break;
case 'note':
case 'exst':
$data = $reader_di->getUI16BE($length);
if ($identifer == 'note') {
$note_message_length_info = $data;
}
break;
case 'vers':
$data = $reader_di->getUI32BE($length);
break;
}
$info['Data'] = $data;
$this->datainfos[] = $info;
}
// Track Part
while ($reader->hasNextData(8)) {
$track = array();
$track['Identifer'] = $reader->getData(4);
$length = $reader->getUI32BE();
$track['Length'] = $length;
$reader_ev = new IO_Bit();
$reader_ev->input($reader->getData($length));
$track['Events'] = array();
while ($reader_ev->hasNextData(3)) {
$event = array();
$event['DeltaTime'] = $reader_ev->getUI8();
$statusInfo = $reader_ev->getUI8();
$event['StatusInfo'] = $statusInfo;
switch ($statusInfo) {
default:
$event['Data'] = $reader_ev->getUI8();
if ($note_message_length_info == 1) {
// MFi2
$event['Data2'] = $reader_ev->getUI8();
}
break;
case 0xff:
$statusInfo2 = $reader_ev->getUI8();
$event['StatusInfo2'] = $statusInfo2;
switch ($statusInfo2) {
default:
$event['Data'] = $reader_ev->getUI8();
break;
case 0xf0:
case 0xf1:
case 0xff:
$length = $reader_ev->getUI16BE();
$event['Length'] = $length;
$event['Data'] = $reader_ev->getData($length);
break;
}
}
$track['Events'][] = $event;
}
$this->tracks[] = $track;
}
}
