Hi :
Iwould like let the IJL( embedded IPP) decode jpeg as YCbCr format,
the code is work for decode as RGB/BGR:
typedef struct _IJLDecoder
{
// create the JPEG structure on the stack
JPEG_CORE_PROPERTIES jcprops;
}IJLDecoderObject;
:
:
IJLDecoderObject *Decoder;
Decoder = (IJLDecoderObject*)malloc(1*sizeof(IJLDecoderObject));
if(NULL == decoder) return NULL;
// intialize the JPEG structure
ijlInit( &(Decoder->jcprops) );
/* set the IJL data source as the input buffer */
/* jpeg as src : pSrcBuf format is YCbCr411.
RGB/BGR as dst: pDstBuf
*/
Decoder->jcprops.JPGBytes = (unsigned char*)pSrcBuf;
Decoder->jcprops.JPGSizeBytes = (int)jpegSize;
/* read JPEG parameters from the input buffer*/
jerr = ijlRead(&(Decoder->jcprops), IJL_JBUFF_READPARAMS);
if(jerr < 0) return -1;
/* set up the DIB specification for the JPEG decoder */
Decoder->jcprops.DIBBytes = (unsigned char*)pDstBuf;
Decoder->jcprops.DIBWidth = Decoder->jcprops.JPGWidth;
Decoder->jcprops.DIBHeight = (int)(Decoder->jcprops.JPGHeight);
Decoder->jcprops.DIBColor = IJL_BGR;
Decoder->jcprops.DIBSubsampling = IJL_NONE;
Decoder->jcprops.DIBChannels = 3;
Decoder->jcprops.DIBPadBytes = IJL_DIB_PAD_BYTES( Decoder->jcprops.DIBWidth, Decoder->jcprops.DIBChannels);
/* read data from the JPEG image into the bitmap*/
jerr = ijlRead(&(Decoder->jcprops), IJL_JBUFF_READWHOLEIMAGE);
When I change the line for decode as YCbCr :
Decoder->jcprops.DIBColor = IJL_BGR;
as
Decoder->jcprops.DIBColor = IJL_YCBCR;
the jerr is not IJL_OK, but IJL_INVALID_JPEG_PROPERTIES !!
How should I do to let the IJL decode as YCbCr (411)?
thank you.
