// UnParse the marker out to the stream.
CNCSError CNCSJPCMarker::UnParse(CNCSJPC &JPC, CNCSJPCIOStream &Stream)
{
&JPC;//Keep compiler happy
m_nOffset = Stream.Tell();
Stream.WriteUINT16((UINT16)m_eMarker);
return(Stream.GetError());
}
// UnParse the box out to the stream.
CNCSError CNCSJP2Box::UnParse(class CNCSJP2File &JP2File, CNCSJPCIOStream &Stream)
{
CNCSError Error;
// If length is > 2^32, need to write out the 64bit XLBox field.
if(m_nXLBox > 0xffffffff) {
// Will be writing XLBox, so write out 1 for the LBox field.
Stream.WriteUINT32(1);
} else {
Stream.WriteUINT32((UINT32)m_nXLBox);
}
if(Stream.GetError() == NCS_SUCCESS) {
// Write out the box type;
if(Stream.WriteUINT32(m_nTBox) && m_nXLBox > 0xffffffff) {
// Write out the XLBox field.
Stream.WriteUINT64(m_nXLBox);
}
Error = Stream.GetError();
}
return(Error);
}
// Parse the marker in from the JP2 file.
CNCSError CNCSJPCMarker::Parse(CNCSJPC &JPC, CNCSJPCIOStream &Stream)
{
&JPC;//Keep compiler happy
// Marker.
UINT16 t16;
m_nOffset = Stream.Tell();
if(Stream.ReadUINT16(t16)) {
m_eMarker = (Type)t16;
m_bHaveMarker = true;
}
return(Stream.GetError());
}
// Parse the box in from the JP2 file.
CNCSError CNCSJP2Box::Parse(class CNCSJP2File &JP2File, CNCSJPCIOStream &Stream)
{
CNCSError Error;
CNCSJP2BoxList::iterator pCur = m_Prev.begin();
while(pCur != m_Prev.end()) { // Make sure box follows the correct box(es)
if((*pCur)->m_bHaveBox == false) {
Error = NCS_FILE_INVALID;
break;
}
pCur++;
}
if(Error == NCS_SUCCESS) { // Make sure box proceeds the correct box(es)
pCur = m_Next.begin();
while(pCur != m_Next.end()) {
if((*pCur)->m_bHaveBox == true) {
Error = NCS_FILE_INVALID;
break;
}
pCur++;
}
if(Error == NCS_SUCCESS) {
if(Stream.Mark()) { // Mark the stream, so we can rewind on an error.
UINT32 nLen;
// Store absolute offset of box in stream
m_nBoxOffset = Stream.Tell();
// Box length.
if(Stream.ReadUINT32(nLen)) {
// Box type
if(Stream.ReadUINT32(m_nTBox)) {
//
// If the 32 bit nLen is equal to 1, then there is a 64bit length field present.
//
if(nLen == 1) {
// Read in the 64bit length
if(Stream.ReadUINT64(m_nXLBox)) {
// Calculate the Data length within the box.
m_nLDBox = m_nXLBox - 16;
}
} else {
if(nLen == 0) {
// Box consists of the rest of the stream
m_nXLBox = 8 + Stream.Size() - Stream.Tell();
} else {
// No 64bit length present
m_nXLBox = nLen;
}
m_nLDBox = m_nXLBox - 8;
}
if(Stream.GetError() == NCS_SUCCESS) {
m_nDBoxOffset = Stream.Tell();
// The type matches, or we don't care. Unmark the stream.
Stream.UnMark();
// Got the box, so set the flag indicating we have it.
m_bHaveBox = true;
}
}
}
}
Error = Stream.GetError();
}
}
return(Error);
}
