Average two blocks with two weights and two offsets.
Syntax
IppStatus ippiBiDirWeightBlock_H264_8u_P2P1R(const Ipp8u* pSrc1, const Ipp8u* pSrc2, Ipp8u* pDst, Ipp32u srcStep, Ipp32u dstStep, Ipp32u ulog2wd, Ipp32s iWeight1, Ipp32s iOffset1, Ipp32s iWeight2, Ipp32s iOffset2, IppiSize roi);
IppStatus ippiBiDirWeightBlock_H264_8u_C2R(IppVCWeightBlock_8u* pIppVCWeightBlock, const IppVCWeightParams_8u* pIppVCWeightParamP1, const IppVCWeightParams_8u* pIppVCWeightParamP2);
IppStatus ippiBidirWeight_H264_16u_P2P1R(const IppVCBidir_16u* bidirInfo, Ipp32u ulog2wd, Ipp32s iWeight1, Ipp32s iOffset1, Ipp32s iWeight2, Ipp32s iOffset2);
Parameters
pSrc1 |
Pointer to the first source. |
pSrc2 |
Pointer to the second source. |
pDst |
Pointer to the result. |
srcStep |
Distance in items between starts of the consecutive lines in the source images. |
dstStep |
Distance in items between starts of the consecutive lines in the result image. |
ulog2wd |
log2 weight denominator. |
iWeight1, iWeight2 |
Weights. |
iOffset1, iOffset2 |
Offsets. |
roi |
Flag that specifies the region of interest (could be 16, 8, 4 or 2 in each dimension). |
bidirInfo |
Pointer to the IppVCBidir_16u structure. |
pIppVCWeightBlock |
Pointer to the structure that holds parameters for both source and destination chrominance combined planes. |
pIppVCWeightParamP1 |
Pointer to the structure that holds parameters for both channels (U and V) of the first source plane. |
pIppVCWeightParamP2 |
Pointer to the structure that holds parameters for both channels (U and V) of the second source plane. |
Description
The functions ippiBiDirWeightBlock_H264_8u_P2P1R, ippiBiDirWeightBlock_H264_8u_C2R and ippiBidirWeight_H264_16u_P2P1R are declared in the ippvc.h file. These functions perform weighted prediction as specified in 8.4.2.3.2 of [ITUH264] when both predFlagL0 and predFlagL1 are equal to 1.
ippiBiDirWeightBlock_H264_8u_C2R is intended for a chrominance combined plane as in the N12 format.
The functions use the following formula:
where x ∈ [0,roi.width-1], y ∈ [0,roi.height-1],
The above formula corresponds to formula 8-272 of ITUH264.
Return Values
ippStsNoErr |
Indicates no error. |
ippStsNullPtrErr |
Indicates an error condition if at least one of the specified pointers is NULL. |
ippStsStepErr |
Indicates an error condition if srcStep value or dstStep value is less than roi.width. |
ippStsSizeErr |
Indicates an error condition if roi.width or roi.height value is not equal to 2 or 4 or 8 or 16. |