ReconstructChromaInter

Reconstructs inter chroma macroblock.

Syntax

IppStatus ippiReconstructChromaInter_AVS_16s8u_C1R(Ipp16s** ppSrcCoeff, Ipp8u* pSrcDstUPlane, Ipp8u* pSrcDstVPlane, Ipp32s srcDstUVStep, const Ipp32s* pSrcNumCoeffs, Ipp32u cbp8x8, Ipp32u chromaQP);

Parameters

ppSrcCoeff	Pointer to the order of 8x8 blocks of residual coefficients for this macroblock, which are taken as a result of entropy decoding (8x8 chrominance inter blocks, if the block is not zero-filled) in the same order as is shown in Figure 6‑7 of [AVS]. The pointer is updated by the function and points to the blocks for the next macroblock.
pSrcDstUPlane	Pointer to the current macroblock that is reconstructed in U-plane.
pSrcDstVPlane	Pointer to the current macroblock that is reconstructed in V-plane.
srcDstUVStep	Chrominance planes step.
pSrcNumCoeffs	Array of indices of the last coefficient in each subblock. pSrcNumCoeffs[i] is defined in the same order as the coded subblocks go.
cbp8x8	Coded block pattern. If cbp8x8 & (1<<(1+i))is not equal to 0 (0 ≤ i < 4), i-th 8x8 AC chroma block is not zero-filled and it exists in ppSrcCoeff.
chromaQP	Quantization parameter (QP from Table 9-6 in [AVS]). It must be within the range [0;51].

Description

The function ippiReconstructChromaInter_AVS_16s8u_C1R is declared in the ippvc.h file. This function reconstructs inter chroma macroblocks:

Performs scaling, integer inverse transformation, and shift for each 8x8 block in the same order as is shown in Figures 6‑7, 6-8 of [AVS] in accordance with 9.5 of [AVS]. Order of the processed blocks depends on the passed cbp8x8 value.
Performs adding of an 8x8 or 8x16 inter prediction block and an 8x8 or 8x16 residual block in accordance with 9.10 of [AVS]. Size of the processed data depends on the passed cbp8x8 value.

Return Values

ippStsNoErr	Indicates no error.
ippStsNullPtrErr	Indicates an error condition if at least one of the specified pointers is NULL.
ippStsOutOfRangeErr	chromaQP is less than 0 or greater than 51.