ReconstructChromaIntra4x4MB_H264, ReconstructChromaIntra4x4

Reconstruct 4X4 intra chroma macroblock for high profile.

Syntax

IppStatus ippiReconstructChromaIntra4x4MB_H264_16s8u_P2R(Ipp16s** ppSrcDstCoeff, Ipp8u* pSrcDstUPlane, Ipp8u* pSrcDstVPlane, Ipp32u srcDstUVStep, IppIntraChromaPredMode_H264 intraChromaMode, Ipp32u cbp4x4, Ipp32s ChromaQPU, Ipp32u ChromaQPV, Ipp8u edgeType, const Ipp16s* pQuantTableU, const Ipp16s* pQuantTableV, Ipp8u bypassFlag);

IppStatus ippiReconstructChromaIntra4x4MB_H264_16s8u_C2R(Ipp16s** ppSrcDstCoeff, Ipp8u* pSrcDstUVPlane, Ipp32u srcDstUVStep, IppIntraChromaPredMode_H264 intraChromaMode, Ipp32u cbp4x4, Ipp32s ChromaQPU, Ipp32u ChromaQPV, Ipp8u edgeType, const Ipp16s* pQuantTableU, const Ipp16s* pQuantTableV, Ipp8u bypassFlag);

IppStatus ippiReconstructChromaIntra4x4_H264High_32s16u_IP2R(const IppiReconstructHighMB_32s16u* pReconstructInfo[2], IppIntraChromaPredMode_H264 intraChromaMode, Ipp32u 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 (2x2 DC U-block, 2x2 DC V-block, 4x4 AC U-blocks, 4x4 AC V-blocks if the block is not zero-filled) in the same order as is shown in Figure 8‑7 of [ITUH264]. Pointer is updated by the function and points to the blocks for the next macroblock.
pSrcDstUPlane	Pointer to a macroblock that is reconstructed in the current U plane.
pSrcDstVPlane	Pointer to a macroblock that is reconstructed in the current V plane.
pSrcDstUVPlane	Pointer to a macroblock that is reconstructed in the current UV plane.
srcDstUVStep	Plane step.
intraChromaMode	Prediction mode of the Intra_chroma prediction process for chroma samples. This mode is defined in the same way as in PredictIntraChroma8x8_H264 function.
cbp4x4	Coded block pattern. If cbp4x4 & (1<<(IPPVC_CBP_1ST_CHROMA_DC_BITPOS) is not equal to 0, 2x2 DC U-block is not zero-filled and exists in ppSrcDstCoeff. If cbp4x4 & (1<<(IPPVC_CBP_1ST_CHROMA_DC_BITPOS+ 1)) is not equal to 0, 2x2 DC U-block is not zero-filled and exists in ppSrcDstCoeff. If cbp4x4 & (1<<(IPPVC_CBP_1ST_CHROMA_AC_BITPOS+ i)) is not equal to 0, (0 ≤ i < 4), i-th 4x4 AC U-block is not zero-filled and exists in ppSrcDstCoeff. If cbp4x4 & (1<<(IPPVC_CBP_1ST_CHROMA_AC_BITPOS+ i+4)) is not equal to 0, (0 ≤ i < 4), i-th 4x4 AC U-block is not zero-filled and exists in ppSrcDstCoeff.
ChromaQPU	Chroma quantizer for U plane (QP_C in [ ITUH264 ]). It must be within the range [0;39].
ChromaQPV	Chroma quantizer for V plane (QP_C in [ ITUH264 ]). It must be within the range [0;39].
edgeType	Flag that specifies the availability of the macroblocks used for prediction. If the upper macroblock is not available for 16x16 intra prediction, edgeType&IPPVC_TOP_EDGE must be non-zero. If the left macroblock is not available for 16x16 intra prediction, edgeType&IPPVC_LEFT_EDGE must be non-zero. If the upper-left macroblock is not available for 16x16 intra prediction, edgeType&IPPVC_TOP_LEFT_EDGE must be non-zero.
pQuantTableU	Pointer to the quantization table for U plane (LevelScale(qP%6, 0, 0)) in [ITUH264]).
pQuantTableV	Pointer to the quantization table for V plane (LevelScale(qP%6, 0, 0)) in [ITUH264]).
bypassFlag	Flag enabling lossless coding.
pReconstructInfo[2]	Pointer to the IppiReconstructHighMB_32s16u structure. The first pointer pReconstructInfo[0] points to the structure with parameters for restructuring chroma macroblock of plane U, and the second pointer pReconstructInfo[1] points to the structure with parameters for restructuring Chroms macroblock of plane V.

Description

The functions ippiReconstructChromaIntra4x4MB_H264_16s8u_P2R, ippiReconstructChromaIntra4x4MB_H264_16s8u_C2R, and ippiReconstructChromaIntra4x4_H264High_32s16u_IP2R are declared in the ippvc.h file.

ippiReconstructChromaIntra4x4MB_H264_16s8u_C2R is intended for a chrominance combined plane as in the N12 format (UVUVUVUV...).

These functions reconstruct 4x4 intra chroma macroblock (8x8 U macroblock and 8x8 V macroblock) for high profile:

Perform integer inverse transformation and dequantization for 2x2 U DC coefficients and for 2x2 V DC coefficients in accordance with 8.5.9 of [ITUH264] according to 8-323 when chroma_format_idc is equal to 1.
Perform scaling, integer inverse transformation, and shift for 4x4 AC U-blocks and shift for 4x4 AC V-blocks in accordance with 8.5.10 of [ITUH264]. This process is performed on all 4x4 chroma blocks in the same order as shown in Figure 8‑7(a) of [ITUH264] when chroma_format_idc is equal to 1.
Perform adding of 4x4 inter prediction blocks and 4x4 residual blocks in accordance with 8-306 of [ITUH264].

These functions are used in the H.264 decoder included into Intel IPP Samples. See introduction to H.264.

Return Values

ippStsNoErr	Indicates no error.
ippStsNullPtrErr	Indicates an error condition if at least one of the specified pointers is NULL.
ippStsOutOfRangeErr	ChromaQPU or ChromaQPV is less than 0 or greater than 39.

ReconstructChromaIntra4x4MB_H264, ReconstructChromaIntra4x4_H264High

Syntax

Parameters

Description

Return Values