ReconstructChroma422Intra4x4

Reconstructs 4X4 intra chroma macroblock for 4:2:2 chroma mode.

Syntax

IppStatus ippiReconstructChroma422Intra4x4_H264High_32s16u_IP2R(const IppiReconstructHighMB_32s16u* pReconstructInfo[2], IppIntraChromaPredMode_H264 intraChromaMode, Ipp32u edgeType, Ipp32u levelScaleDCU, Ipp32u levelScaleDCV);

IppStatus ippiReconstructChroma422Intra4x4_H264High_16s8u_IP2R(const IppiReconstructHighMB_16s8u* pReconstructInfo[2], IppIntraChromaPredMode_H264 intraChromaMode, Ipp32u edgeType, Ipp32u levelScaleDCU, Ipp32u levelScaleDCV);

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(b) of [ITUH264]. Pointer is updated by the function and points to the blocks for the next macroblock.
pSrcDstUPlane	Pointer to macroblock that is reconstructed in current U plane. This macroblock must contain intra prediction samples.
pSrcDstVPlane	Pointer to macroblock that is reconstructed in current V plane. This macroblock must contain intra prediction samples.
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 < 8), i-th 4x4 AC U-block is not zero-filled and exists in ppSrcDstCoeff. If cbp4x4 & (1<<(IPPVC_CBP_1ST_CHROMA_AC_BITPOS+ i+8)) is not equal to 0, (0 ≤ i < 8), 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].
levelScaleDCU	Chroma quantizer for U plane (LevelScale(QP_C,DC%6, 0, 0)) in [ITUH264]) for chroma DC coefficients.
levelScaleDCV	Chroma quantizer for V plane (LevelScale(QP_C,DC%6, 0, 0)) in [ITUH264]) for chroma DC coefficients.
edgeType	Flag that specifies the availability of the macroblocks used for prediction. If the upper macroblock is not available for intra prediction, edgeType&IPPVC_TOP_EDGE must be non-zero. If the left macroblock is not available for intra prediction, edgeType&IPPVC_LEFT_EDGE must be non-zero. If the upper-left macroblock is not available for intra prediction, edgeType&IPPVC_TOP_LEFT_EDGE must be non-zero.
pQuantTableU	Pointer to the quantization table for U plane (LevelScale(qP%6, i, j) in [ITUH264]).
pQuantTableV	Pointer to the quantization table for V plane (LevelScale(qP%6, i, j) in [ITUH264]).
bypassFlag	Flag enabling lossless coding.
pReconstructInfo[2]	Pointer to the IppiReconstructHighMB_32s16u and IppiReconstructHighMB_16s8u structures. 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 ippiReconstructChroma422Intra4x4_H264High_32s16u_IP2R and ippiReconstructChroma422Intra4x4_H264High_16s8u_IP2R are declared in the ippvc.h file. These functions reconstruct eight 4x4 intra chroma macroblocks (16x8 U macroblock and 16x8 V macroblock) for chroma format 4:2:2 (chroma_format_idc is equal to 2):

Perform integer inverse transformation and dequantization for 2x2 U DC coefficients and for 2x2 V DC coefficients in accordance with 8.5.7 of [ITUH264] in the same way as TransformDequantChromaDC_H264 function does.
Perform scaling, integer inverse transformation, and shift for 4x4 AC U-blocks and shift for 4x4 AC V-blocks in accordance with 8.5.8 of [ITUH264] in the same way as DequantTransformResidual_H264 function does. This process is performed on all 4x4 chroma blocks in the same order as is shown in Figure 8‑7(b) of [ITUH264].
Perform adding of 16x8 intra prediction blocks and 16x8 residual blocks in accordance with 8-306 of [ITUH264].

These functions ares 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.