ref: efe32b7900e5aeebe7427cd315fe8c69ae9d14f6
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_kuiMbNonZeroCountIdx[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_kuiMbNonZeroCountIdx[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; } typedef struct TagMCRefMember { uint8_t* pDstY; uint8_t* pDstU; uint8_t* pDstV; uint8_t* pSrcY; uint8_t* pSrcU; uint8_t* pSrcV; int32_t iSrcLineLuma; int32_t iSrcLineChroma; int32_t iDstLineLuma; int32_t iDstLineChroma; int32_t iPicWidth; int32_t iPicHeight; } sMCRefMember; //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 static inline void BaseMC (sMCRefMember* pMCRefMem, int32_t iXOffset, int32_t iYOffset, SMcFunc* pMCFunc, int32_t iBlkWidth, int32_t iBlkHeight, int16_t iMVs[2]) { int32_t iExpandWidth = PADDING_LENGTH; int32_t iExpandHeight = PADDING_LENGTH; int16_t iMVX = iMVs[0] >> 2; int16_t iMVY = iMVs[1] >> 2; int32_t iMVOffsetLuma = iMVX + iMVY * pMCRefMem->iSrcLineLuma; int32_t iMVOffsetChroma = (iMVX >> 1) + (iMVY >> 1) * pMCRefMem->iSrcLineChroma; int32_t iFullMVx = (iXOffset << 2) + iMVs[0]; //quarter pixel int32_t iFullMVy = (iYOffset << 2) + iMVs[1]; int32_t iIntMVx = iFullMVx >> 2;//integer pixel int32_t iIntMVy = iFullMVy >> 2; int32_t iSrcPixOffsetLuma = iXOffset + iYOffset * pMCRefMem->iSrcLineLuma; int32_t iSrcPixOffsetChroma = (iXOffset >> 1) + (iYOffset >> 1) * pMCRefMem->iSrcLineChroma; int32_t iBlkWidthChroma = iBlkWidth >> 1; int32_t iBlkHeightChroma = iBlkHeight >> 1; int32_t iPicWidthChroma = pMCRefMem->iPicWidth >> 1; int32_t iPicHeightChroma = pMCRefMem->iPicHeight >> 1; //the offset only for luma padding if MV violation as there was 5-tap (-2, -1, 0, 1, 2) filter for luma (horizon and vertical) int32_t iPadOffset = 2 + (pMCRefMem->iSrcLineLuma << 1); //(-2, -2) pixel location as the starting point 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; bool bExpand = false; ENFORCE_STACK_ALIGN_1D (uint8_t, uiExpandBuf, (PADDING_LENGTH + 6) * (PADDING_LENGTH + 6), 16); if (iFullMVx & 0x07) { iExpandWidth -= 3; } if (iFullMVy & 0x07) { iExpandHeight -= 3; } #ifdef MC_FLOW_SIMPLE_JUDGE if (iIntMVx < -iExpandWidth || iIntMVy < -iExpandHeight || iIntMVx + iBlkWidth > pMCRefMem->iPicWidth - 1 + iExpandWidth || iIntMVy + iBlkHeight > pMCRefMem->iPicHeight - 1 + iExpandHeight) #else if (iIntMVx < -iExpandWidth || iIntMVy < -iExpandHeight || iIntMVx + PADDING_LENGTH > pMCRefMem->iPicWidth + iExpandWidth || iIntMVy + PADDING_LENGTH > pMCRefMem->iPicHeight + iExpandHeight) #endif { FillBufForMc (uiExpandBuf, 21, pSrcY, pMCRefMem->iSrcLineLuma, iMVOffsetLuma - iPadOffset, iBlkWidth + 5, iBlkHeight + 5, iIntMVx - 2, iIntMVy - 2, pMCRefMem->iPicWidth, pMCRefMem->iPicHeight); pMCFunc->pMcLumaFunc (uiExpandBuf + 44, 21, pDstY, pMCRefMem->iDstLineLuma, iFullMVx, iFullMVy, iBlkWidth, iBlkHeight); //44=2+2*21 bExpand = true; } else { pSrcY += iMVOffsetLuma; pMCFunc->pMcLumaFunc (pSrcY, pMCRefMem->iSrcLineLuma, pDstY, pMCRefMem->iDstLineLuma, iFullMVx, iFullMVy, iBlkWidth, iBlkHeight); } if (bExpand) { FillBufForMc (uiExpandBuf, 21, pSrcU, pMCRefMem->iSrcLineChroma, iMVOffsetChroma, iBlkWidthChroma + 1, iBlkHeightChroma + 1, iFullMVx >> 3, iFullMVy >> 3, iPicWidthChroma, iPicHeightChroma); pMCFunc->pMcChromaFunc (uiExpandBuf, 21, pDstU, pMCRefMem->iDstLineChroma, iFullMVx, iFullMVy, iBlkWidthChroma, iBlkHeightChroma); FillBufForMc (uiExpandBuf, 21, pSrcV, pMCRefMem->iSrcLineChroma, iMVOffsetChroma, iBlkWidthChroma + 1, iBlkHeightChroma + 1, iFullMVx >> 3, iFullMVy >> 3, iPicWidthChroma, iPicHeightChroma); pMCFunc->pMcChromaFunc (uiExpandBuf, 21, pDstV, pMCRefMem->iDstLineChroma, iFullMVx, iFullMVy, iBlkWidthChroma, iBlkHeightChroma); } else { pSrcU += iMVOffsetChroma; pSrcV += iMVOffsetChroma; 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 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; 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); 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); 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); 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); 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); 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); 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); 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); 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); 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); 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); 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); } } 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_kuiMbNonZeroCountIdx[16 + (i << 2) + j]] || pRSI4x4[0]) { pIdctResAddPredFunc (pPredI4x4, iChromaStride, pRSI4x4); } } } } return ERR_NONE; } void FillBufForMc (uint8_t* pBuf, int32_t iBufStride, uint8_t* pSrc, int32_t iSrcStride, int32_t iSrcOffset, int32_t iBlockWidth, int32_t iBlockHeight, int32_t iSrcX, int32_t iSrcY, int32_t iPicWidth, int32_t iPicHeight) { int32_t iY; int32_t iStartY, iStartX, iEndY, iEndX; int32_t iOffsetAdj = 0; int32_t iAddrSrc, iAddrBuf; int32_t iNum, iNum1; uint8_t* pBufSrc, *pBufDst; uint8_t* pBufSrc1, *pBufDst1; if (iSrcY >= iPicHeight) { iOffsetAdj += (iPicHeight - 1 - iSrcY) * iSrcStride; iSrcY = iPicHeight - 1; } else if (iSrcY <= -iBlockHeight) { iOffsetAdj += (1 - iBlockHeight - iSrcY) * iSrcStride; iSrcY = 1 - iBlockHeight; } if (iSrcX >= iPicWidth) { iOffsetAdj += (iPicWidth - 1 - iSrcX); iSrcX = iPicWidth - 1; } else if (iSrcX <= -iBlockWidth) { iOffsetAdj += (1 - iBlockWidth - iSrcX); iSrcX = 1 - iBlockWidth; } iOffsetAdj += iSrcOffset; #define MAX(a,b) ((a) > (b) ? (a) : (b)) #define MIN(a,b) ((a) > (b) ? (b) : (a)) iStartY = MAX (0, -iSrcY); iStartX = MAX (0, -iSrcX); iEndY = MIN (iBlockHeight, iPicHeight - iSrcY); iEndX = MIN (iBlockWidth, iPicWidth - iSrcX); // copy existing part iAddrSrc = iStartX + iStartY * iSrcStride; iAddrBuf = iStartX + iStartY * iBufStride; iNum = iEndX - iStartX; for (iY = iStartY; iY < iEndY; iY++) { memcpy (pBuf + iAddrBuf, pSrc + iOffsetAdj + iAddrSrc, iNum); iAddrSrc += iSrcStride; iAddrBuf += iBufStride; } //top pBufSrc = pBuf + iStartX + iStartY * iBufStride; pBufDst = pBuf + iStartX; iNum = iEndX - iStartX; for (iY = 0; iY < iStartY; iY++) { memcpy (pBufDst, pBufSrc, iNum); pBufDst += iBufStride; } //bottom pBufSrc = pBuf + iStartX + (iEndY - 1) * iBufStride; pBufDst = pBuf + iStartX + iEndY * iBufStride; iNum = iEndX - iStartX; for (iY = iEndY; iY < iBlockHeight; iY++) { memcpy (pBufDst, pBufSrc, iNum); pBufDst += iBufStride; } pBufSrc = pBuf + iStartX; pBufDst = pBuf; iNum = iStartX; pBufSrc1 = pBuf + iEndX - 1; pBufDst1 = pBuf + iEndX; iNum1 = iBlockWidth - iEndX; for (iY = 0; iY < iBlockHeight; iY++) { //left memset (pBufDst, pBufSrc[0], iNum); pBufDst += iBufStride; pBufSrc += iBufStride; //right memset (pBufDst1, pBufSrc1[0], iNum1); pBufDst1 += iBufStride; pBufSrc1 += iBufStride; } } } // namespace WelsDec