problem with ippiYCbCr422_8u_C2P3R

[shyaki]

I wanted to convert YUY2 to YUV422, but the color of the image was not correct after calling ippiYCbCr422_8u_C2P3R().

I successfully converted to YUV422 by YUY2 -> YUV420 -> YUV422 for the same data.

It seems to me that ippiYCbCr422_8u_C2P3R() has a bug.

[Vladimir_Dudnik]

Could you please attach piece of code which does not work as expected?

Vladimir

[shyaki]

The YUY2 -> YUV422 was not implemented originally in UMC::ColorSpaceConversion, but I added the branch in

ColorSpaceConversion::GetFrame

{

...

switch

(srcFormat) {

...

case YUY2:

switch (dstFormat) {

...

case

YUV422: status = ippiYCbCr422_8u_C2P3R(pSrc[0], pSrcStep[0], pDstYVU, pDstStepYVU, srcSize); break;

}

}

}

After I added the code, I just used the VideoProcessing object to do the conversion:

pYUV422_8bit

->SetAlignment(16); pYUV422_8bit->Init(width, height, YUV422, 8); pYUV422_8bit->Alloc(); ret = m_pVideoProcessing->GetFrame(pYUY2_8bit,pYUV422_8bit);

The result was not correct.

But I could do the conversion in two steps like

YUY2 -> YUV420 -> YUV422

[Vladimir_Dudnik]

may be the issue is in the way you call this function, I mean parameters you put into function may not correlate with what function expecting?

This function work quite perfectin IPPJPEG codec (JPEGView sample).

Regards,
Vladimir