/*
* public:
*
* dng_lossless_encoder(const uint16* srcData,
* uint32 srcRows,
* uint32 srcCols,
* uint32 srcChannels,
* uint32 srcBitDepth,
* int32 srcRowStep,
* int32 srcColStep,
* dng_stream &stream);
*
* void Encode();
*
* private:
*
* void EmitByte(uint8 value);
*
* void EmitBits(int code, int size);
*
* void FlushBits();
*
* void CountOneDiff(int diff, uint32* countTable);
*
* void EncodeOneDiff(int diff, HuffmanTable* dctbl);
*
* void FreqCountSet();
*
* void HuffEncode();
*
* void GenHuffCoding(HuffmanTable* htbl, uint32* freq);
*
* void HuffOptimize();
*
* void EmitMarker(JpegMarker mark);
*
* void Emit2bytes(int value);
*
* void EmitDht(int index);
*
* void EmitSof(JpegMarker code);
*
* void EmitSos();
*
* void WriteFileHeader();
*
* void WriteScanHeader();
*
* void WriteFileTrailer();
*
* };
*
* /*****************************************************************************/
public DNGLosslessEncoder(uint16[] srcData,
uint32 srcRows,
uint32 srcCols,
uint32 srcChannels,
uint32 srcBitDepth,
int32 srcRowStep,
int32 srcColStep,
dng_stream stream)
{
fSrcData = srcData;
fSrcRows = srcRows;
fSrcCols = srcCols;
fSrcChannels = srcChannels;
fSrcBitDepth = srcBitDepth;
fSrcRowStep = srcRowStep;
fSrcColStep = srcColStep;
fStream = stream;
huffPutBuffer = 0;
huffPutBits = 0;
// Initialize number of bits lookup table.
numBitsTable[0] = 0;
for (int i = 1; i < 256; i++)
{
int temp = i;
int nbits = 1;
while ((temp >>= 1) != 0)
{
nbits++;
}
numBitsTable[i] = nbits;
}
}
/*****************************************************************************/
static public void EncodeLosslessJPEG(uint16[] srcData,
uint32 srcRows,
uint32 srcCols,
uint32 srcChannels,
uint32 srcBitDepth,
int32 srcRowStep,
int32 srcColStep,
dng_stream stream)
{
DNGLosslessEncoder encoder = new DNGLosslessEncoder(srcData,
srcRows,
srcCols,
srcChannels,
srcBitDepth,
srcRowStep,
srcColStep,
stream);
encoder.Encode();
}
