ReconstructLumaIntraHalfMB

Reconstructs half of intra luma macroblock.

Syntax

IppStatus ippiReconstructLumaIntraHalfMB_H264_16s8u_C1R(Ipp16s** ppSrcCoeff, Ipp8u* pSrcDstYPlane, Ipp32s srcDstYStep, IppIntra4x4PredMode_H264* pMBIntraTypes, Ipp32u cbp4x2, Ipp32u QP, Ipp8u edgeType);

Parameters

ppSrcCoeff	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 6‑6 of [JVTG050]. 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 Y-plane.
srcDstYStep	Y-Plane step.
pMBIntraTypes	Array of Intra_4x4 luma prediction modes for 8 subblocks. pMBIntraTypes[ i] is defined in the same way as in PredictIntra_4x4_H264 function (0 ≤ i < 8 ).
cbp4x2	Coded block pattern. If cbp4x2 & (1<<(1+i )) is not equal to 0 (0 ≤ i < 8), i-th 4x4 AC luma block is not zero-filled and it exists in ppSrcCoeff.
QP	Quantization parameter ( QP_Y in [JVTG050]). 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.

Description

The function ippiReconstructLumaIntraHalfMB_H264_16s8u_C1R is declared in the ippvc.h file. This function reconstructs a half of intra luma macroblock, that is, eight 4x4 subblocks. The process for the eight 4x4 blocks (from 0 to 7 or from 8 to 15) in the same order as is shown in Figure 6‑6 of [JVTG050] is described below:

Performs scaling, integer inverse transformation, and shift for a 4x4 block in accordance with 8.5.8 of [JVTG050] in the same way as DequantTransformResidual_H264 function does.
Performs intra prediction for a 4x4 luma component in accordance with 8.3.1.2 of [JVTG050] in the same way as PredictIntra_4x4_H264 function does.
Performs adding of 16x8 prediction block and 16x8 residual block in accordance with 8-247 of [JVTG050].

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.