Question Dequaant Chroma api

[kilee]

Hi

I use two type model, same avc file andsame source code.

firstmodel : resolution 640x480 16bit colors.

second model : resolution 320x240 16bit colors.

My question below api function.

IppStatus ippiTransformDequantChromaDCFromPair_H264_8u16s_C1(Ipp8u **ppSrc, Ipp16s* pDst, int QP);

**Input value two type

*First frame input value -> pDst = {0,0,0,0}

first model : in case return value ippStsNoErr

second model : in case return value ippStsBadArgErr

*First fram input value -> pDst = {11, FFFFFFFE, 0, 0}

first model : in case return value ippStsBadArgErr

second model : in case return value ippStsNoErr

I don't know why two typemodel difference to return value.

[Vladimir_Dudnik]

Hi,

did you try IPP samples?

http://www.intel.com/software/products/ipp/samples.htm

We provide H.264 encoder/decoder samples, where you can see how to use this function in codec.

Regards,

Vladimir

[kilee]

Hi

I used IPP H264 decoder sample code.

IppStatus ippiTransformDequantChromaDC_H264_16s_C1I (Ipp16s* pSrcDst, Ipp32s QP);

-> change IPP PCA api function below

IppStatus ippiTransformDequantChromaDCFromPair_H264_8u16s_C1(Ipp8u **ppSrc, Ipp16s* pDst, int QP);

[Vladimir_Dudnik]

Hi,

if you feel it is bug, please report this issue to premier.intel.com

Thanks,

Vladimir