ref: 78ab4000c086c07d6841365541fd86d12ca98e4d
dir: /codec/decoder/core/src/rec_mb.cpp/
/*!
* \copy
* Copyright (c) 2009-2013, Cisco Systems
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*
* \file rec_mb.c
*
* \brief implementation for all macroblock decoding process after mb syntax parsing and residual decoding with cavlc.
*
* \date 3/18/2009 Created
*
*************************************************************************************
*/
#include "rec_mb.h"
#include "decode_slice.h"
namespace WelsDec {
void WelsFillRecNeededMbInfo (PWelsDecoderContext pCtx, bool bOutput, PDqLayer pCurLayer) {
PPicture pCurPic = pCtx->pDec;
int32_t iLumaStride = pCurPic->iLinesize[0];
int32_t iChromaStride = pCurPic->iLinesize[1];
int32_t iMbX = pCurLayer->iMbX;
int32_t iMbY = pCurLayer->iMbY;
pCurLayer->iLumaStride = iLumaStride;
pCurLayer->iChromaStride = iChromaStride;
if (bOutput) {
pCurLayer->pPred[0] = pCurPic->pData[0] + ((iMbY * iLumaStride + iMbX) << 4);
pCurLayer->pPred[1] = pCurPic->pData[1] + ((iMbY * iChromaStride + iMbX) << 3);
pCurLayer->pPred[2] = pCurPic->pData[2] + ((iMbY * iChromaStride + iMbX) << 3);
}
}
int32_t RecI4x4Mb (int32_t iMBXY, PWelsDecoderContext pCtx, int16_t* pScoeffLevel, PDqLayer pDqLayer) {
RecI4x4Luma (iMBXY, pCtx, pScoeffLevel, pDqLayer);
RecI4x4Chroma (iMBXY, pCtx, pScoeffLevel, pDqLayer);
return ERR_NONE;
}
int32_t RecI4x4Luma (int32_t iMBXY, PWelsDecoderContext pCtx, int16_t* pScoeffLevel, PDqLayer pDqLayer) {
/*****get local variable from outer variable********/
/*prediction info*/
uint8_t* pPred = pDqLayer->pPred[0];
int32_t iLumaStride = pDqLayer->iLumaStride;
int32_t* pBlockOffset = pCtx->iDecBlockOffsetArray;
PGetIntraPredFunc* pGetI4x4LumaPredFunc = pCtx->pGetI4x4LumaPredFunc;
int8_t* pIntra4x4PredMode = pDqLayer->pIntra4x4FinalMode[iMBXY];
int16_t* pRS = pScoeffLevel;
/*itransform info*/
PIdctResAddPredFunc pIdctResAddPredFunc = pCtx->pIdctResAddPredFunc;
/*************local variable********************/
uint8_t i = 0;
/*************real process*********************/
for (i = 0; i < 16; i++) {
uint8_t* pPredI4x4 = pPred + pBlockOffset[i];
uint8_t uiMode = pIntra4x4PredMode[g_kuiScan4[i]];
pGetI4x4LumaPredFunc[uiMode] (pPredI4x4, iLumaStride);
if (pDqLayer->pNzc[iMBXY][g_kuiMbCountScan4Idx[i]]) {
int16_t* pRSI4x4 = &pRS[i << 4];
pIdctResAddPredFunc (pPredI4x4, iLumaStride, pRSI4x4);
}
}
return ERR_NONE;
}
int32_t RecI4x4Chroma (int32_t iMBXY, PWelsDecoderContext pCtx, int16_t* pScoeffLevel, PDqLayer pDqLayer) {
int32_t iChromaStride = pCtx->pCurDqLayer->pDec->iLinesize[1];
int8_t iChromaPredMode = pDqLayer->pChromaPredMode[iMBXY];
PGetIntraPredFunc* pGetIChromaPredFunc = pCtx->pGetIChromaPredFunc;
uint8_t* pPred = pDqLayer->pPred[1];
pGetIChromaPredFunc[iChromaPredMode] (pPred, iChromaStride);
pPred = pDqLayer->pPred[2];
pGetIChromaPredFunc[iChromaPredMode] (pPred, iChromaStride);
RecChroma (iMBXY, pCtx, pScoeffLevel, pDqLayer);
return ERR_NONE;
}
int32_t RecI16x16Mb (int32_t iMBXY, PWelsDecoderContext pCtx, int16_t* pScoeffLevel, PDqLayer pDqLayer) {
/*decoder use, encoder no use*/
int8_t iI16x16PredMode = pDqLayer->pIntraPredMode[iMBXY][7];
int8_t iChromaPredMode = pDqLayer->pChromaPredMode[iMBXY];
PGetIntraPredFunc* pGetIChromaPredFunc = pCtx->pGetIChromaPredFunc;
PGetIntraPredFunc* pGetI16x16LumaPredFunc = pCtx->pGetI16x16LumaPredFunc;
int32_t iUVStride = pCtx->pCurDqLayer->pDec->iLinesize[1];
/*common use by decoder&encoder*/
int32_t iYStride = pDqLayer->iLumaStride;
int32_t* pBlockOffset = pCtx->iDecBlockOffsetArray;
int16_t* pRS = pScoeffLevel;
uint8_t* pPred = pDqLayer->pPred[0];
PIdctResAddPredFunc pIdctResAddPredFunc = pCtx->pIdctResAddPredFunc;
uint8_t i = 0;
/*decode i16x16 y*/
pGetI16x16LumaPredFunc[iI16x16PredMode] (pPred, iYStride);
/*1 mb is divided 16 4x4_block to idct*/
for (i = 0; i < 16; i++) {
int16_t* pRSI4x4 = pRS + (i << 4);
uint8_t* pPredI4x4 = pPred + pBlockOffset[i];
if (pDqLayer->pNzc[iMBXY][g_kuiMbCountScan4Idx[i]] || pRSI4x4[0]) {
pIdctResAddPredFunc (pPredI4x4, iYStride, pRSI4x4);
}
}
/*decode intra mb cb&cr*/
pPred = pDqLayer->pPred[1];
pGetIChromaPredFunc[iChromaPredMode] (pPred, iUVStride);
pPred = pDqLayer->pPred[2];
pGetIChromaPredFunc[iChromaPredMode] (pPred, iUVStride);
RecChroma (iMBXY, pCtx, pScoeffLevel, pDqLayer);
return ERR_NONE;
}
//according to current 8*8 block ref_index to gain reference picture
static inline void GetRefPic (sMCRefMember* pMCRefMem, PWelsDecoderContext pCtx, int8_t* pRefIdxList,
int32_t iIndex) {
PPicture pRefPic;
int8_t iRefIdx = pRefIdxList[iIndex];
pRefPic = pCtx->sRefPic.pRefList[LIST_0][iRefIdx];
pMCRefMem->iSrcLineLuma = pRefPic->iLinesize[0];
pMCRefMem->iSrcLineChroma = pRefPic->iLinesize[1];
pMCRefMem->pSrcY = pRefPic->pData[0];
pMCRefMem->pSrcU = pRefPic->pData[1];
pMCRefMem->pSrcV = pRefPic->pData[2];
}
#ifndef MC_FLOW_SIMPLE_JUDGE
#define MC_FLOW_SIMPLE_JUDGE 1
#endif //MC_FLOW_SIMPLE_JUDGE
void BaseMC (sMCRefMember* pMCRefMem, int32_t iXOffset, int32_t iYOffset, SMcFunc* pMCFunc,
int32_t iBlkWidth, int32_t iBlkHeight, int16_t iMVs[2]) {
int32_t iFullMVx = (iXOffset << 2) + iMVs[0]; //quarter pixel
int32_t iFullMVy = (iYOffset << 2) + iMVs[1];
iFullMVx = WELS_CLIP3 (iFullMVx, ((-PADDING_LENGTH + 2) << 2), ((pMCRefMem->iPicWidth + PADDING_LENGTH - 19) << 2));
iFullMVy = WELS_CLIP3 (iFullMVy, ((-PADDING_LENGTH + 2) << 2), ((pMCRefMem->iPicHeight + PADDING_LENGTH - 19) << 2));
int32_t iSrcPixOffsetLuma = (iFullMVx >> 2) + (iFullMVy >> 2) * pMCRefMem->iSrcLineLuma;
int32_t iSrcPixOffsetChroma = (iFullMVx >> 3) + (iFullMVy >> 3) * pMCRefMem->iSrcLineChroma;
int32_t iBlkWidthChroma = iBlkWidth >> 1;
int32_t iBlkHeightChroma = iBlkHeight >> 1;
uint8_t* pSrcY = pMCRefMem->pSrcY + iSrcPixOffsetLuma;
uint8_t* pSrcU = pMCRefMem->pSrcU + iSrcPixOffsetChroma;
uint8_t* pSrcV = pMCRefMem->pSrcV + iSrcPixOffsetChroma;
uint8_t* pDstY = pMCRefMem->pDstY;
uint8_t* pDstU = pMCRefMem->pDstU;
uint8_t* pDstV = pMCRefMem->pDstV;
pMCFunc->pMcLumaFunc (pSrcY, pMCRefMem->iSrcLineLuma, pDstY, pMCRefMem->iDstLineLuma, iFullMVx, iFullMVy, iBlkWidth,
iBlkHeight);
pMCFunc->pMcChromaFunc (pSrcU, pMCRefMem->iSrcLineChroma, pDstU, pMCRefMem->iDstLineChroma, iFullMVx, iFullMVy,
iBlkWidthChroma, iBlkHeightChroma);
pMCFunc->pMcChromaFunc (pSrcV, pMCRefMem->iSrcLineChroma, pDstV, pMCRefMem->iDstLineChroma, iFullMVx, iFullMVy,
iBlkWidthChroma, iBlkHeightChroma);
}
void WeightPrediction (PDqLayer pCurDqLayer, sMCRefMember* pMCRefMem, int32_t iRefIdx, int32_t iBlkWidth,
int32_t iBlkHeight) {
int32_t iLog2denom, iWoc, iOoc;
int32_t iPredTemp, iLineStride;
int32_t iPixel = 0;
uint8_t* pDst;
//luma
iLog2denom = pCurDqLayer->pPredWeightTable->uiLumaLog2WeightDenom;
iWoc = pCurDqLayer->pPredWeightTable->sPredList[LIST_0].iLumaWeight[iRefIdx];
iOoc = pCurDqLayer->pPredWeightTable->sPredList[LIST_0].iLumaOffset[iRefIdx];
iLineStride = pMCRefMem->iDstLineLuma;
for (int i = 0; i < iBlkHeight; i++) {
for (int j = 0; j < iBlkWidth; j++) {
iPixel = j + i * (iLineStride);
if (iLog2denom >= 1) {
iPredTemp = ((pMCRefMem->pDstY[iPixel] * iWoc + (1 << (iLog2denom - 1))) >> iLog2denom) + iOoc;
pMCRefMem->pDstY[iPixel] = WELS_CLIP3 (iPredTemp, 0, 255);
} else {
iPredTemp = pMCRefMem->pDstY[iPixel] * iWoc + iOoc;
pMCRefMem->pDstY[iPixel] = WELS_CLIP3 (iPredTemp, 0, 255);
}
}
}
//UV
iBlkWidth = iBlkWidth >> 2;
iBlkHeight = iBlkHeight >> 2;
iLog2denom = pCurDqLayer->pPredWeightTable->uiChromaLog2WeightDenom;
iLineStride = pMCRefMem->iDstLineChroma;
for (int i = 0; i < 2; i++) {
//iLog2denom = pCurDqLayer->pPredWeightTable->uiChromaLog2WeightDenom;
iWoc = pCurDqLayer->pPredWeightTable->sPredList[LIST_0].iChromaWeight[iRefIdx][i];
iOoc = pCurDqLayer->pPredWeightTable->sPredList[LIST_0].iChromaOffset[iRefIdx][i];
pDst = i ? pMCRefMem->pDstV : pMCRefMem->pDstU;
//iLineStride = pMCRefMem->iDstLineChroma;
for (int i = 0; i < iBlkHeight ; i++) {
for (int j = 0; j < iBlkWidth; j++) {
iPixel = j + i * (iLineStride);
if (iLog2denom >= 1) {
iPredTemp = ((pDst[iPixel] * iWoc + (1 << (iLog2denom - 1))) >> iLog2denom) + iOoc;
pDst[iPixel] = WELS_CLIP3 (iPredTemp, 0, 255);
} else {
iPredTemp = pDst[iPixel] * iWoc + iOoc;
pDst[iPixel] = WELS_CLIP3 (iPredTemp, 0, 255);
}
}
}
}
}
void GetInterPred (uint8_t* pPredY, uint8_t* pPredCb, uint8_t* pPredCr, PWelsDecoderContext pCtx) {
sMCRefMember pMCRefMem;
PDqLayer pCurDqLayer = pCtx->pCurDqLayer;
SMcFunc* pMCFunc = &pCtx->sMcFunc;
int32_t iMBXY = pCurDqLayer->iMbXyIndex;
int16_t iMVs[2] = {0};
int32_t iMBType = pCurDqLayer->pMbType[iMBXY];
int32_t iMBOffsetX = pCurDqLayer->iMbX << 4;
int32_t iMBOffsetY = pCurDqLayer->iMbY << 4;
int32_t iDstLineLuma = pCtx->pDec->iLinesize[0];
int32_t iDstLineChroma = pCtx->pDec->iLinesize[1];
int32_t iBlk8X, iBlk8Y, iBlk4X, iBlk4Y, i, j, iIIdx, iJIdx;
pMCRefMem.iPicWidth = (pCurDqLayer->sLayerInfo.sSliceInLayer.sSliceHeaderExt.sSliceHeader.iMbWidth << 4);
pMCRefMem.iPicHeight = (pCurDqLayer->sLayerInfo.sSliceInLayer.sSliceHeaderExt.sSliceHeader.iMbHeight << 4);
pMCRefMem.pDstY = pPredY;
pMCRefMem.pDstU = pPredCb;
pMCRefMem.pDstV = pPredCr;
pMCRefMem.iDstLineLuma = iDstLineLuma;
pMCRefMem.iDstLineChroma = iDstLineChroma;
int32_t iRefIndex = 0;
switch (iMBType) {
case MB_TYPE_SKIP:
case MB_TYPE_16x16:
iMVs[0] = pCurDqLayer->pMv[0][iMBXY][0][0];
iMVs[1] = pCurDqLayer->pMv[0][iMBXY][0][1];
GetRefPic (&pMCRefMem, pCtx, pCurDqLayer->pRefIndex[0][iMBXY], 0);
BaseMC (&pMCRefMem, iMBOffsetX, iMBOffsetY, pMCFunc, 16, 16, iMVs);
if (pCurDqLayer->bUseWeightPredictionFlag) {
iRefIndex = pCurDqLayer->pRefIndex[0][iMBXY][0];
WeightPrediction (pCurDqLayer, &pMCRefMem, iRefIndex, 16, 16);
}
break;
case MB_TYPE_16x8:
iMVs[0] = pCurDqLayer->pMv[0][iMBXY][0][0];
iMVs[1] = pCurDqLayer->pMv[0][iMBXY][0][1];
GetRefPic (&pMCRefMem, pCtx, pCurDqLayer->pRefIndex[0][iMBXY], 0);
BaseMC (&pMCRefMem, iMBOffsetX, iMBOffsetY, pMCFunc, 16, 8, iMVs);
if (pCurDqLayer->bUseWeightPredictionFlag) {
iRefIndex = pCurDqLayer->pRefIndex[0][iMBXY][0];
WeightPrediction (pCurDqLayer, &pMCRefMem, iRefIndex, 16, 8);
}
iMVs[0] = pCurDqLayer->pMv[0][iMBXY][8][0];
iMVs[1] = pCurDqLayer->pMv[0][iMBXY][8][1];
GetRefPic (&pMCRefMem, pCtx, pCurDqLayer->pRefIndex[0][iMBXY], 8);
pMCRefMem.pDstY = pPredY + (iDstLineLuma << 3);
pMCRefMem.pDstU = pPredCb + (iDstLineChroma << 2);
pMCRefMem.pDstV = pPredCr + (iDstLineChroma << 2);
BaseMC (&pMCRefMem, iMBOffsetX, iMBOffsetY + 8, pMCFunc, 16, 8, iMVs);
if (pCurDqLayer->bUseWeightPredictionFlag) {
iRefIndex = pCurDqLayer->pRefIndex[0][iMBXY][8];
WeightPrediction (pCurDqLayer, &pMCRefMem, iRefIndex, 16, 8);
}
break;
case MB_TYPE_8x16:
iMVs[0] = pCurDqLayer->pMv[0][iMBXY][0][0];
iMVs[1] = pCurDqLayer->pMv[0][iMBXY][0][1];
GetRefPic (&pMCRefMem, pCtx, pCurDqLayer->pRefIndex[0][iMBXY], 0);
BaseMC (&pMCRefMem, iMBOffsetX, iMBOffsetY, pMCFunc, 8, 16, iMVs);
if (pCurDqLayer->bUseWeightPredictionFlag) {
iRefIndex = pCurDqLayer->pRefIndex[0][iMBXY][0];
WeightPrediction (pCurDqLayer, &pMCRefMem, iRefIndex, 8, 16);
}
iMVs[0] = pCurDqLayer->pMv[0][iMBXY][2][0];
iMVs[1] = pCurDqLayer->pMv[0][iMBXY][2][1];
GetRefPic (&pMCRefMem, pCtx, pCurDqLayer->pRefIndex[0][iMBXY], 2);
pMCRefMem.pDstY = pPredY + 8;
pMCRefMem.pDstU = pPredCb + 4;
pMCRefMem.pDstV = pPredCr + 4;
BaseMC (&pMCRefMem, iMBOffsetX + 8, iMBOffsetY, pMCFunc, 8, 16, iMVs);
if (pCurDqLayer->bUseWeightPredictionFlag) {
iRefIndex = pCurDqLayer->pRefIndex[0][iMBXY][2];
WeightPrediction (pCurDqLayer, &pMCRefMem, iRefIndex, 8, 16);
}
break;
case MB_TYPE_8x8:
case MB_TYPE_8x8_REF0: {
uint32_t iSubMBType;
int32_t iXOffset, iYOffset;
uint8_t* pDstY, *pDstU, *pDstV;
for (i = 0; i < 4; i++) {
iSubMBType = pCurDqLayer->pSubMbType[iMBXY][i];
iBlk8X = (i & 1) << 3;
iBlk8Y = (i >> 1) << 3;
iXOffset = iMBOffsetX + iBlk8X;
iYOffset = iMBOffsetY + iBlk8Y;
iIIdx = ((i >> 1) << 3) + ((i & 1) << 1);
GetRefPic (&pMCRefMem, pCtx, pCurDqLayer->pRefIndex[0][iMBXY], iIIdx);
iRefIndex = pCurDqLayer->bUseWeightPredictionFlag ? pCurDqLayer->pRefIndex[0][iMBXY][iIIdx] : 0;
pDstY = pPredY + iBlk8X + iBlk8Y * iDstLineLuma;
pDstU = pPredCb + (iBlk8X >> 1) + (iBlk8Y >> 1) * iDstLineChroma;
pDstV = pPredCr + (iBlk8X >> 1) + (iBlk8Y >> 1) * iDstLineChroma;
pMCRefMem.pDstY = pDstY;
pMCRefMem.pDstU = pDstU;
pMCRefMem.pDstV = pDstV;
switch (iSubMBType) {
case SUB_MB_TYPE_8x8:
iMVs[0] = pCurDqLayer->pMv[0][iMBXY][iIIdx][0];
iMVs[1] = pCurDqLayer->pMv[0][iMBXY][iIIdx][1];
BaseMC (&pMCRefMem, iXOffset, iYOffset, pMCFunc, 8, 8, iMVs);
if (pCurDqLayer->bUseWeightPredictionFlag) {
WeightPrediction (pCurDqLayer, &pMCRefMem, iRefIndex, 8, 8);
}
break;
case SUB_MB_TYPE_8x4:
iMVs[0] = pCurDqLayer->pMv[0][iMBXY][iIIdx][0];
iMVs[1] = pCurDqLayer->pMv[0][iMBXY][iIIdx][1];
BaseMC (&pMCRefMem, iXOffset, iYOffset, pMCFunc, 8, 4, iMVs);
if (pCurDqLayer->bUseWeightPredictionFlag) {
WeightPrediction (pCurDqLayer, &pMCRefMem, iRefIndex, 8, 4);
}
iMVs[0] = pCurDqLayer->pMv[0][iMBXY][iIIdx + 4][0];
iMVs[1] = pCurDqLayer->pMv[0][iMBXY][iIIdx + 4][1];
pMCRefMem.pDstY += (iDstLineLuma << 2);
pMCRefMem.pDstU += (iDstLineChroma << 1);
pMCRefMem.pDstV += (iDstLineChroma << 1);
BaseMC (&pMCRefMem, iXOffset, iYOffset + 4, pMCFunc, 8, 4, iMVs);
if (pCurDqLayer->bUseWeightPredictionFlag) {
WeightPrediction (pCurDqLayer, &pMCRefMem, iRefIndex, 8, 4);
}
break;
case SUB_MB_TYPE_4x8:
iMVs[0] = pCurDqLayer->pMv[0][iMBXY][iIIdx][0];
iMVs[1] = pCurDqLayer->pMv[0][iMBXY][iIIdx][1];
BaseMC (&pMCRefMem, iXOffset, iYOffset, pMCFunc, 4, 8, iMVs);
if (pCurDqLayer->bUseWeightPredictionFlag) {
WeightPrediction (pCurDqLayer, &pMCRefMem, iRefIndex, 4, 8);
}
iMVs[0] = pCurDqLayer->pMv[0][iMBXY][iIIdx + 1][0];
iMVs[1] = pCurDqLayer->pMv[0][iMBXY][iIIdx + 1][1];
pMCRefMem.pDstY += 4;
pMCRefMem.pDstU += 2;
pMCRefMem.pDstV += 2;
BaseMC (&pMCRefMem, iXOffset + 4, iYOffset, pMCFunc, 4, 8, iMVs);
if (pCurDqLayer->bUseWeightPredictionFlag) {
WeightPrediction (pCurDqLayer, &pMCRefMem, iRefIndex, 4, 8);
}
break;
case SUB_MB_TYPE_4x4: {
for (j = 0; j < 4; j++) {
int32_t iUVLineStride;
iJIdx = ((j >> 1) << 2) + (j & 1);
iBlk4X = (j & 1) << 2;
iBlk4Y = (j >> 1) << 2;
iUVLineStride = (iBlk4X >> 1) + (iBlk4Y >> 1) * iDstLineChroma;
pMCRefMem.pDstY = pDstY + iBlk4X + iBlk4Y * iDstLineLuma;
pMCRefMem.pDstU = pDstU + iUVLineStride;
pMCRefMem.pDstV = pDstV + iUVLineStride;
iMVs[0] = pCurDqLayer->pMv[0][iMBXY][iIIdx + iJIdx][0];
iMVs[1] = pCurDqLayer->pMv[0][iMBXY][iIIdx + iJIdx][1];
BaseMC (&pMCRefMem, iXOffset + iBlk4X, iYOffset + iBlk4Y, pMCFunc, 4, 4, iMVs);
if (pCurDqLayer->bUseWeightPredictionFlag) {
WeightPrediction (pCurDqLayer, &pMCRefMem, iRefIndex, 4, 4);
}
}
}
break;
default:
break;
}
}
}
break;
default:
break;
}
}
int32_t RecChroma (int32_t iMBXY, PWelsDecoderContext pCtx, int16_t* pScoeffLevel, PDqLayer pDqLayer) {
int32_t iChromaStride = pCtx->pCurDqLayer->pDec->iLinesize[1];
PIdctResAddPredFunc pIdctResAddPredFunc = pCtx->pIdctResAddPredFunc;
uint8_t i = 0, j = 0;
uint8_t uiCbpC = pDqLayer->pCbp[iMBXY] >> 4;
if (1 == uiCbpC || 2 == uiCbpC) {
WelsChromaDcIdct (pScoeffLevel + 256); // 256 = 16*16
WelsChromaDcIdct (pScoeffLevel + 320); // 256 = 16*16
for (i = 0; i < 2; i++) {
int16_t* pRS = pScoeffLevel + 256 + (i << 6);
uint8_t* pPred = pDqLayer->pPred[i + 1];
int32_t* pBlockOffset = i == 0 ? &pCtx->iDecBlockOffsetArray[16] : &pCtx->iDecBlockOffsetArray[20];
/*1 chroma is divided 4 4x4_block to idct*/
for (j = 0; j < 4; j++) {
int16_t* pRSI4x4 = &pRS[j << 4];
uint8_t* pPredI4x4 = pPred + pBlockOffset[j];
if (pDqLayer->pNzc[iMBXY][g_kuiMbCountScan4Idx[16 + (i << 2) + j]] || pRSI4x4[0]) {
pIdctResAddPredFunc (pPredI4x4, iChromaStride, pRSI4x4);
}
}
}
}
return ERR_NONE;
}
} // namespace WelsDec