ReconstructLumaIntra4x4MB_H264, ReconstructLumaIntra4x4_H264High

Reconstruct 4X4 intra luma macroblock for high profile.

Syntax

IppStatus ippiReconstructLumaIntra4x4MB_H264_16s8u_C1R(Ipp16s** ppSrcDstCoeff, Ipp8u* pSrcDstYPlane, Ipp32s srcDstYStep, IppIntra4x4PredMode_H264* pMBIntraTypes, Ipp32u cbp4x4, Ipp32s QP, Ipp8u edgeType, const Ipp16s* pQuantTable, Ipp8u bypassFlag);

IppStatus ippiReconstructLumaIntra4x4_H264High_32s16u_IP1R(const IppiReconstructHighMB_32s16u* pReconstructInfo, const IppIntra4x4PredMode_H264* pMBIntraTypes, Ipp32s edgeType);

Parameters

ppSrcDstCoeff

Pointer to the order of 4x4 blocks of residual coefficients for this macroblock, which are taken as a result of Huffman decoding (4x4 luma blocks, if the block is not zero-filled) in the same order as is shown in Figure 6‑10 of [ITUH264]. Pointer is updated by the function and points to the blocks for the next macroblock.

pSrcDstYPlane

Pointer to the current macroblock that is reconstructed in current Y-plane.

srcDstYStep

Y-plane step.

pMBIntraTypes

Array of Intra_4x4 luma prediction modes for each subblock. pMBIntraTypes[ i] is defined in the same way as in PredictIntra_4x4_H264 function (0 ≤ i < 16).

cbp4x4

Coded block pattern. If cbp4x4 & (1<<(1+i)) is not equal to 0 (0 ≤ i < 16), i-th 4x4 AC luma block is not zero-filled and it exists in ppSrcDstCoeff.

QP

Quantization parameter ( QPY in [ITUH264]). It must be within the range [0;51].

edgeType

Flag that specifies the availability of the macroblocks used for prediction.

If the upper macroblock is not available for 4x4 intra prediction, edgeType&IPPVC_TOP_EDGE must be non-zero.

If the left macroblock is not available for 4x4 intra prediction, edgeType&IPPVC_LEFT_EDGE must be non-zero.

If the upper-left macroblock is not available for 4x4 intra prediction, edgeType&IPPVC_TOP_LEFT_EDGE must be non-zero.

If the upper-right macroblock is not available for 4x4 intra prediction, edgeType&IPPVC_TOP_RIGHT_EDGE must be non-zero.

pQuantTable

Pointer to the quantization table (LevelScale(qP%6, i, j) in [ITUH264]).

bypassFlag

Flag enabling lossless coding.

pReconstructInfo

Pointer to the IppiReconstructHighMB_32s16u structure.

Description

The functions ippiReconstructLumaIntra4x4MB_H264_16s8u_C1R and ippiReconstructLumaIntra4x4_H264High_32s16u_IP1R are declared in the ippvc.h file. These functions reconstruct inter luma macroblock for high profile. The process for each 4x4 block in the same order as is shown in Figure 6-10 of [ITUH264] is described below:

Return Values

ippStsNoErr

Indicates no error.

ippStsNullPtrErr

Indicates an error condition if at least one of the specified pointers is NULL.

ippStsOutOfRangeErr

QP is less than 0 or greater than 51.


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