PtrLList<Chunker::Fragment> * Chunker::fragmentBuffer (const void *pBuf, uint32 ui32Len, Type inputObjectType, uint8 ui8NoOfChunks, Type outputChunkType, uint8 ui8ChunkCompressionQuality)
{
BMPImage *pBMPImage = NULL;
if (inputObjectType == Chunker::BMP) {
BufferReader br (pBuf, ui32Len, false);
int rc;
pBMPImage = new BMPImage();
if (0 != (rc = pBMPImage->readHeaderAndImage (&br))) {
checkAndLogMsg ("Chunker::fragmentBuffer", Logger::L_MildError,
"failed to read BMP image; rc = %d\n", rc);
delete pBMPImage;
return NULL;
}
}
else if (inputObjectType == Chunker::JPEG) {
pBMPImage = JPEGLibWrapper::convertJPEGToBMP (pBuf, ui32Len);
if (pBMPImage == NULL) {
checkAndLogMsg ("Chunker::fragmentBuffer", Logger::L_MildError,
"failed to convert JPEG image to BMP\n");
return NULL;
}
}
else if (inputObjectType == Chunker::JPEG2000) {
#if defined (ANDROID)
checkAndLogMsg ("Chunker::fragmentBuffer", Logger::L_MildError,
"JPEG2000 not supported on the Android platform\n");
return NULL;
#else
BufferReader *pReader = JasperWrapper::convertToBMP (pBuf, ui32Len);
if (pReader == NULL) {
checkAndLogMsg ("Chunker::fragmentBuffer", Logger::L_MildError,
"failed to convert JPEG2000 image to BMP\n");
return NULL;
}
int rc;
pBMPImage = new BMPImage();
if (0 != (rc = pBMPImage->readHeaderAndImage (pReader))) {
checkAndLogMsg ("Chunker::fragmentBuffer", Logger::L_MildError,
"failed to read BMP image after converting JPEG2000 to BMP; rc = %d\n", rc);
delete pBMPImage;
delete pReader;
return NULL;
}
delete pReader;
#endif
}
else if (inputObjectType == Chunker::PNG) {
#if defined (ANDROID)
checkAndLogMsg ("Chunker::fragmentBuffer", Logger::L_MildError,
"JPEG2000 not supported on the Android platform\n");
return NULL;
#else
pBMPImage = PNGLibWrapper::convertPNGToBMP (pBuf, ui32Len);
if (pBMPImage == NULL) {
checkAndLogMsg ("Chunker::fragmentBuffer", Logger::L_MildError,
"failed to convert PNG image to BMP\n");
return NULL;
}
#endif
}
else {
checkAndLogMsg ("Chunker::fragmentBuffer", Logger::L_MildError,
"unsupported input type %d\n", (int) inputObjectType);
return NULL;
}
PtrLList<Fragment> *pFragments = new PtrLList<Fragment>;
for (uint8 ui8CurrentChunk = 1; ui8CurrentChunk <= ui8NoOfChunks; ui8CurrentChunk++) {
BMPImage *pBMPChunk = BMPChunker::fragmentBMP (pBMPImage, ui8CurrentChunk, ui8NoOfChunks);
if (pBMPChunk == NULL) {
checkAndLogMsg ("Chunker::fragmentBuffer", Logger::L_MildError,
"failed to fragment BMP to create chunk %d of %d\n", (int) ui8CurrentChunk, (int) ui8NoOfChunks);
delete pFragments;
return NULL;
}
int rc;
Fragment *pFragment = new Fragment();
pFragment->src_type = inputObjectType;
if (outputChunkType == Chunker::BMP) {
BufferWriter bw (pBMPChunk->getTotalSize(), 1024);
if (0 != (rc = pBMPChunk->writeHeaderAndImage (&bw))) {
checkAndLogMsg ("Chunker::fragmentBuffer", Logger::L_MildError,
"failed to write chunk BMP into buffer; rc = %d\n", rc);
delete pFragments;
return NULL;
}
uint32 ui32ChunkLen = bw.getBufferLength();
pFragment->pReader = new BufferReader (bw.relinquishBuffer(), ui32ChunkLen, true);
pFragment->ui64FragLen = ui32ChunkLen;
}
else if (outputChunkType == Chunker::JPEG) {
BufferReader *pReader = JPEGLibWrapper::convertBMPToJPEG (pBMPChunk, ui8ChunkCompressionQuality);
if (pReader == NULL) {
checkAndLogMsg ("Chunker::fragmentBuffer", Logger::L_MildError,
"failed to encode BMP chunk into JPEG\n");
delete pFragments;
return NULL;
}
pFragment->pReader = pReader;
pFragment->ui64FragLen = pReader->getBytesAvailable();
}
else if (outputChunkType == Chunker::JPEG2000) {
#if defined (ANDROID)
checkAndLogMsg ("Chunker::fragmentBuffer", Logger::L_MildError,
"JPEG2000 not supported on the Android platform\n");
delete pFragments;
return NULL;
#else
BufferWriter bw (pBMPChunk->getTotalSize(), 1024);
if (0 != (rc = pBMPChunk->writeHeaderAndImage (&bw))) {
checkAndLogMsg ("Chunker::fragmentBuffer", Logger::L_MildError,
"failed to write chunk BMP into buffer for creating JPEG2000; rc = %d\n", rc);
delete pFragments;
return NULL;
}
BufferReader *pReader = JasperWrapper::convertToJPEG2000 (bw.getBuffer(), bw.getBufferLength());
if (pReader == NULL) {
checkAndLogMsg ("Chunker::fragmentBuffer", Logger::L_MildError,
"failed to encode BMP chunk into JPEG2000\n");
delete pFragments;
return NULL;
}
pFragment->pReader = pReader;
pFragment->ui64FragLen = pReader->getBytesAvailable();
#endif
}
else {
checkAndLogMsg ("Chunker::fragmentBuffer", Logger::L_MildError,
"unsupported output type %d\n", (int) outputChunkType);
return NULL;
}
pFragment->out_type = outputChunkType;
pFragment->ui8Part = ui8CurrentChunk;
pFragment->ui8TotParts = ui8NoOfChunks;
pFragments->append (pFragment);
}
return pFragments;
}
