CHARLS_IMEXPORT(JLS_ERROR) JpegLsEncode(void* compressedData, size_t compressedLength, size_t* pcbyteWritten, const void* uncompressedData, size_t uncompressedLength, struct JlsParameters* pparams)
{
ByteStreamInfo rawStreamInfo = FromByteArray(uncompressedData, uncompressedLength);
ByteStreamInfo compressedStreamInfo = FromByteArray(compressedData, compressedLength);
return JpegLsEncodeStream(compressedStreamInfo, pcbyteWritten, rawStreamInfo, pparams);
}
void
JPEGLSCodec::compress(const FrameBuffer &frame)
{
const Box2i dataW = dataWindow();
const int width = (dataW.max.x - dataW.min.x + 1);
const int height = (dataW.max.y - dataW.min.y + 1);
const PixelType pixType = (_depth == JPEGLS_8 ? UINT8 :
_depth == JPEGLS_10 ? UINT10 :
_depth == JPEGLS_12 ? UINT12 :
_depth == JPEGLS_16 ? UINT16 :
UINT8);
const size_t pixSize = PixelSize(pixType);
const unsigned int bitDepth = PixelBits(pixType);
const int numChannels = (_channels == JPEGLS_RGBA ? 4 : 3);
const size_t tempPixelSize = (numChannels * pixSize);
const size_t tempRowbytes = (tempPixelSize * width);
const size_t tempBufSize = (tempRowbytes * height);
DataChunk dataChunk(tempBufSize);
char *tempBuffer = (char *)dataChunk.Data;
assert(dataW.min.x == 0 && dataW.min.y == 0);
FrameBuffer tempFrameBuffer(dataW);
tempFrameBuffer.insert("R", Slice(pixType, &tempBuffer[0 * pixSize], tempPixelSize, tempRowbytes));
tempFrameBuffer.insert("G", Slice(pixType, &tempBuffer[1 * pixSize], tempPixelSize, tempRowbytes));
tempFrameBuffer.insert("B", Slice(pixType, &tempBuffer[2 * pixSize], tempPixelSize, tempRowbytes));
if(_channels == JPEGLS_RGBA)
tempFrameBuffer.insert("A", Slice(pixType, &tempBuffer[3 * pixSize], tempPixelSize, tempRowbytes));
tempFrameBuffer.copyFromFrame(frame);
JlsParameters params = JlsParameters();
params.width = width;
params.height = height;
params.bitspersample = bitDepth;
//params.bytesperline = (tempRowbytes / 3);
params.components = numChannels;
params.allowedlossyerror = 0; // always lossless
params.ilv = ILV_SAMPLE;
params.colorTransform = COLORXFORM_NONE;
//params.outputBgr = 0;
/*
params.custom.MAXVAL = 255;
params.custom.T1 = 0;
params.custom.T2 = 0;
params.custom.T3 = 0;
params.custom.RESET = 1;
params.jfif.Ver = 123;
params.jfif.units = 0;
params.jfif.XDensity = 72;
params.jfif.YDensity = 72;
params.jfif.Xthumb = 0;
params.jfif.Ythumb = 0;
params.jfif.pdataThumbnail = NULL;
*/
ByteStreamInfo inStream = FromByteArray(dataChunk.Data, dataChunk.Size);
DataChunkPtr outDataChunk = new DataChunk(tempBufSize);
size_t bytesWritten = 0;
JLS_ERROR err = OK;
do
{
ByteStreamInfo outStream = FromByteArray(outDataChunk->Data, outDataChunk->Size);
err = JpegLsEncodeStream(outStream, &bytesWritten, inStream, ¶ms);
if(err == CompressedBufferTooSmall)
{
outDataChunk->Resize(2 * outDataChunk->Size, false);
}
}while(err == CompressedBufferTooSmall);
assert(err != TooMuchCompressedData);
if(err == OK)
{
assert(bytesWritten > 0);
outDataChunk->Resize(bytesWritten);
storeData(outDataChunk);
}
else
throw MoxMxf::ArgExc("JPEG-LS compression error");
}
