/*! * \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	svc_encode_slice.c * * \brief	svc encoding slice * * \date	2009.07.27 Created * ************************************************************************************* */ #include "ls_defines.h"#include "svc_encode_slice.h"#include "svc_enc_golomb.h"#include "svc_base_layer_md.h"#include "svc_encode_mb.h"#include "svc_set_mb_syn.h"#include "decode_mb_aux.h"#include "svc_mode_decision.h" namespace WelsEnc {//#define ENC_TRACE typedef int32_t (*PWelsCodingSliceFunc) (sWelsEncCtx* pCtx, SSlice* pSlice);typedef void (*PWelsSliceHeaderWriteFunc) (sWelsEncCtx* pCtx, SBitStringAux* pBs, SDqLayer* pCurLayer, SSlice* pSlice,    int32_t* pPpsIdDelta); void UpdateNonZeroCountCache (SMB* pMb, SMbCache* pMbCache) {  ST32 (&pMbCache->iNonZeroCoeffCount[9], LD32 (&pMb->pNonZeroCount[ 0]));  ST32 (&pMbCache->iNonZeroCoeffCount[17], LD32 (&pMb->pNonZeroCount[ 4]));  ST32 (&pMbCache->iNonZeroCoeffCount[25], LD32 (&pMb->pNonZeroCount[ 8]));  ST32 (&pMbCache->iNonZeroCoeffCount[33], LD32 (&pMb->pNonZeroCount[12]));   ST16 (&pMbCache->iNonZeroCoeffCount[14], LD16 (&pMb->pNonZeroCount[16]));  ST16 (&pMbCache->iNonZeroCoeffCount[38], LD16 (&pMb->pNonZeroCount[18]));  ST16 (&pMbCache->iNonZeroCoeffCount[22], LD16 (&pMb->pNonZeroCount[20]));  ST16 (&pMbCache->iNonZeroCoeffCount[46], LD16 (&pMb->pNonZeroCount[22]));} void WelsSliceHeaderScalExtInit (SDqLayer* pCurLayer, SSlice* pSlice) {  SSliceHeaderExt* pSliceHeadExt	= &pSlice->sSliceHeaderExt;  SNalUnitHeaderExt* pNalHeadExt = &pCurLayer->sLayerInfo.sNalHeaderExt;   uint8_t uiDependencyId	= pNalHeadExt->uiDependencyId;   pSliceHeadExt->bSliceSkipFlag = false;   if (uiDependencyId > 0) { //spatial EL    //bothe adaptive and default flags should equal to 0.    pSliceHeadExt->bAdaptiveBaseModeFlag     =      pSliceHeadExt->bAdaptiveMotionPredFlag   =        pSliceHeadExt->bAdaptiveResidualPredFlag = false;     pSliceHeadExt->bDefaultBaseModeFlag     =      pSliceHeadExt->bDefaultMotionPredFlag   =        pSliceHeadExt->bDefaultResidualPredFlag = false;  }} void WelsSliceHeaderExtInit (sWelsEncCtx* pEncCtx, SDqLayer* pCurLayer, SSlice* pSlice) {  SSliceHeaderExt* pCurSliceExt = &pSlice->sSliceHeaderExt;  SSliceHeader* pCurSliceHeader  = &pCurSliceExt->sSliceHeader;   pCurSliceHeader->eSliceType	= pEncCtx->eSliceType;   pCurSliceExt->bStoreRefBasePicFlag = false;   pCurSliceHeader->iFirstMbInSlice = WelsGetFirstMbOfSlice (pCurLayer->pSliceEncCtx, pSlice->uiSliceIdx);   pCurSliceHeader->iFrameNum      = pEncCtx->iFrameNum;  pCurSliceHeader->uiIdrPicId     = pEncCtx->sPSOVector.uiIdrPicId; //??   pCurSliceHeader->iPicOrderCntLsb          = pEncCtx->pEncPic->iFramePoc;	// 0   if (P_SLICE == pEncCtx->eSliceType) {    pCurSliceHeader->uiNumRefIdxL0Active	= 1;    if (pCurSliceHeader->uiRefCount > 0 &&        pCurSliceHeader->uiRefCount < pCurLayer->sLayerInfo.pSpsP->iNumRefFrames) {      pCurSliceHeader->bNumRefIdxActiveOverrideFlag = true;      pCurSliceHeader->uiNumRefIdxL0Active	= pCurSliceHeader->uiRefCount;    }    //to solve mismatch between debug&release    else {      pCurSliceHeader->bNumRefIdxActiveOverrideFlag = false;    }  }   pCurSliceHeader->iSliceQpDelta = pEncCtx->iGlobalQp - pCurLayer->sLayerInfo.pPpsP->iPicInitQp;   //for deblocking initial  pCurSliceHeader->uiDisableDeblockingFilterIdc			= pCurLayer->iLoopFilterDisableIdc;  pCurSliceHeader->iSliceAlphaC0Offset					=    pCurLayer->iLoopFilterAlphaC0Offset;	//	need update iSliceAlphaC0Offset & iSliceBetaOffset for pSlice-header if loop_filter_idc != 1  pCurSliceHeader->iSliceBetaOffset						= pCurLayer->iLoopFilterBetaOffset;  pCurSliceExt->uiDisableInterLayerDeblockingFilterIdc = pCurLayer->uiDisableInterLayerDeblockingFilterIdc;   if (pSlice->bSliceHeaderExtFlag) {    WelsSliceHeaderScalExtInit (pCurLayer, pSlice);  } else {    //both adaptive and default flags should equal to 0.    pCurSliceExt->bAdaptiveBaseModeFlag		=      pCurSliceExt->bAdaptiveMotionPredFlag		=        pCurSliceExt->bAdaptiveResidualPredFlag	= false;     pCurSliceExt->bDefaultBaseModeFlag		=      pCurSliceExt->bDefaultMotionPredFlag		=        pCurSliceExt->bDefaultResidualPredFlag	= false;  }} /* count MB types if enabled FRAME_INFO_OUTPUT*/#if defined(MB_TYPES_CHECK)void WelsCountMbType (int32_t (*iMbCount)[18], const EWelsSliceType keSt, const SMB* kpMb) {  if (NULL == iMbCount)    return;   switch (kpMb->uiMbType) {  case MB_TYPE_INTRA4x4:    ++ iMbCount[keSt][Intra4x4];    break;  case MB_TYPE_INTRA16x16:    ++ iMbCount[keSt][Intra16x16];    break;  case MB_TYPE_SKIP:    ++ iMbCount[keSt][PSkip];    break;  case MB_TYPE_16x16:    ++ iMbCount[keSt][Inter16x16];    break;  case MB_TYPE_16x8:    ++ iMbCount[keSt][Inter16x8];    break;  case MB_TYPE_8x16:    ++ iMbCount[eSt][Inter8x16];    break;  case MB_TYPE_8x8:    ++ iMbCount[keSt][Inter8x8];    break;  case MB_TYPE_INTRA_BL:    ++ iMbCount[keSt][7];    break;  default:    break;  }}#endif//MB_TYPES_CHECK /*!* \brief	write reference picture list on reordering syntax in Slice header*/void WriteReferenceReorder (SBitStringAux* pBs, SSliceHeader* sSliceHeader) {  SRefPicListReorderSyntax* pRefOrdering	= &sSliceHeader->sRefReordering;  uint8_t eSliceType						= sSliceHeader->eSliceType % 5;  int16_t n = 0;   if (I_SLICE != eSliceType && SI_SLICE != eSliceType) {	// !I && !SI    BsWriteOneBit (pBs, true);//		{    uint16_t uiReorderingOfPicNumsIdc;    do {      uiReorderingOfPicNumsIdc = pRefOrdering->SReorderingSyntax[n].uiReorderingOfPicNumsIdc;      BsWriteUE (pBs, uiReorderingOfPicNumsIdc);      if (0 == uiReorderingOfPicNumsIdc || 1 == uiReorderingOfPicNumsIdc)        BsWriteUE (pBs, pRefOrdering->SReorderingSyntax[n].uiAbsDiffPicNumMinus1);      else if (2 == uiReorderingOfPicNumsIdc)        BsWriteUE (pBs, pRefOrdering->SReorderingSyntax[n].iLongTermPicNum);       n ++;    } while (3 != uiReorderingOfPicNumsIdc);//		}  }} /*!* \brief	write reference picture marking syntax in pSlice header*/void WriteRefPicMarking (SBitStringAux* pBs, SSliceHeader* pSliceHeader, SNalUnitHeaderExt* pNalHdrExt) {  SRefPicMarking* sRefMarking	= &pSliceHeader->sRefMarking;  int16_t n = 0;   if (pNalHdrExt->bIdrFlag) {    BsWriteOneBit (pBs, sRefMarking->bNoOutputOfPriorPicsFlag);    BsWriteOneBit (pBs, sRefMarking->bLongTermRefFlag);  } else {    BsWriteOneBit (pBs, sRefMarking->bAdaptiveRefPicMarkingModeFlag);     if (sRefMarking->bAdaptiveRefPicMarkingModeFlag) {      int32_t iMmcoType;      do {        iMmcoType = sRefMarking->SMmcoRef[n].iMmcoType;        BsWriteUE (pBs, iMmcoType);        if (1 == iMmcoType || 3 == iMmcoType)          BsWriteUE (pBs, sRefMarking->SMmcoRef[n].iDiffOfPicNum - 1);         if (2 == iMmcoType)          BsWriteUE (pBs, sRefMarking->SMmcoRef[n].iLongTermPicNum);         if (3 == iMmcoType || 6 == iMmcoType)          BsWriteUE (pBs, sRefMarking->SMmcoRef[n].iLongTermFrameIdx);         if (4 == iMmcoType)          BsWriteUE (pBs, sRefMarking->SMmcoRef[n].iMaxLongTermFrameIdx + 1);         n ++;      } while (0 != iMmcoType);    }   }} void WelsSliceHeaderWrite (sWelsEncCtx* pCtx, SBitStringAux* pBs, SDqLayer* pCurLayer, SSlice* pSlice, int32_t* pPpsIdDelta) {  SWelsSPS* pSps = pCurLayer->sLayerInfo.pSpsP;  SWelsPPS* pPps = pCurLayer->sLayerInfo.pPpsP;  SSliceHeader* pSliceHeader      = &pSlice->sSliceHeaderExt.sSliceHeader;  SNalUnitHeaderExt* pNalHead   = &pCurLayer->sLayerInfo.sNalHeaderExt;   BsWriteUE (pBs, pSliceHeader->iFirstMbInSlice);  BsWriteUE (pBs, pSliceHeader->eSliceType);    /* same type things */   BsWriteUE (pBs, pSliceHeader->pPps->iPpsId + pPpsIdDelta[pSliceHeader->pPps->iPpsId]);   BsWriteBits (pBs, pSps->uiLog2MaxFrameNum, pSliceHeader->iFrameNum);   if (pNalHead->bIdrFlag) { /* NAL IDR */    BsWriteUE (pBs, pSliceHeader->uiIdrPicId);  }   BsWriteBits (pBs, pSps->iLog2MaxPocLsb, pSliceHeader->iPicOrderCntLsb);   if (P_SLICE == pSliceHeader->eSliceType) {    BsWriteOneBit (pBs, pSliceHeader->bNumRefIdxActiveOverrideFlag);    if (pSliceHeader->bNumRefIdxActiveOverrideFlag) {      BsWriteUE (pBs, pSliceHeader->uiNumRefIdxL0Active - 1);    }  }   if (!pNalHead->bIdrFlag)    WriteReferenceReorder (pBs, pSliceHeader);   if (pNalHead->sNalHeader.uiNalRefIdc) {    WriteRefPicMarking (pBs, pSliceHeader, pNalHead);  }   if (pPps->bEntropyCodingModeFlag && pSliceHeader->eSliceType  != I_SLICE) {    BsWriteUE (pBs, pSlice->iCabacInitIdc);  }  BsWriteSE (pBs, pSliceHeader->iSliceQpDelta);       /* pSlice qp delta */   if (pPps->bDeblockingFilterControlPresentFlag) {    switch (pSliceHeader->uiDisableDeblockingFilterIdc) {    case 0:    case 3:    case 4:    case 6:      BsWriteUE (pBs, 0);      break;    case 1:      BsWriteUE (pBs, 1);      break;    case 2:    case 5:      BsWriteUE (pBs, 2);      break;    default:      WelsLog(&pCtx->sLogCtx, WELS_LOG_ERROR, "Invalid uiDisableDeblockingFilterIdc %d", pSliceHeader->uiDisableDeblockingFilterIdc);      break;    }    if (1 != pSliceHeader->uiDisableDeblockingFilterIdc) {      BsWriteSE (pBs, pSliceHeader->iSliceAlphaC0Offset >> 1);      BsWriteSE (pBs, pSliceHeader->iSliceBetaOffset >> 1);    }  }} void WelsSliceHeaderExtWrite (sWelsEncCtx* pCtx, SBitStringAux* pBs, SDqLayer* pCurLayer, SSlice* pSlice, int32_t* pPpsIdDelta) {  SWelsSPS* pSps           = pCurLayer->sLayerInfo.pSpsP;  SWelsPPS* pPps           = pCurLayer->sLayerInfo.pPpsP;  SSubsetSps* pSubSps = pCurLayer->sLayerInfo.pSubsetSpsP;  SSliceHeaderExt* pSliceHeadExt = &pSlice->sSliceHeaderExt;  SSliceHeader* pSliceHeader      = &pSliceHeadExt->sSliceHeader;  SNalUnitHeaderExt* pNalHead   = &pCurLayer->sLayerInfo.sNalHeaderExt;   BsWriteUE (pBs, pSliceHeader->iFirstMbInSlice);  BsWriteUE (pBs, pSliceHeader->eSliceType);    /* same type things */   BsWriteUE (pBs, pSliceHeader->pPps->iPpsId + pPpsIdDelta[pSliceHeader->pPps->iPpsId]);   BsWriteBits (pBs, pSps->uiLog2MaxFrameNum, pSliceHeader->iFrameNum);   if (pNalHead->bIdrFlag) { /* NAL IDR */    BsWriteUE (pBs, pSliceHeader->uiIdrPicId);  }   BsWriteBits (pBs, pSps->iLog2MaxPocLsb, pSliceHeader->iPicOrderCntLsb);//	{  if (P_SLICE == pSliceHeader->eSliceType) {    BsWriteOneBit (pBs, pSliceHeader->bNumRefIdxActiveOverrideFlag);    if (pSliceHeader->bNumRefIdxActiveOverrideFlag) {      BsWriteUE (pBs, pSliceHeader->uiNumRefIdxL0Active - 1);    }  }   if (!pNalHead->bIdrFlag)    WriteReferenceReorder (pBs, pSliceHeader);   if (pNalHead->sNalHeader.uiNalRefIdc) {    WriteRefPicMarking (pBs, pSliceHeader, pNalHead);     if (!pSubSps->sSpsSvcExt.bSliceHeaderRestrictionFlag) {      BsWriteOneBit (pBs, pSliceHeadExt->bStoreRefBasePicFlag);    }  }//	}    if (pPps->bEntropyCodingModeFlag && pSliceHeader->eSliceType  != I_SLICE) {    BsWriteUE (pBs, pSlice->iCabacInitIdc);  }   BsWriteSE (pBs, pSliceHeader->iSliceQpDelta);       /* pSlice qp delta */   if (pPps->bDeblockingFilterControlPresentFlag) {    BsWriteUE (pBs, pSliceHeader->uiDisableDeblockingFilterIdc);    if (1 != pSliceHeader->uiDisableDeblockingFilterIdc) {      BsWriteSE (pBs, pSliceHeader->iSliceAlphaC0Offset >> 1);      BsWriteSE (pBs, pSliceHeader->iSliceBetaOffset >> 1);    }  } #if !defined(DISABLE_FMO_FEATURE)  if (pPps->uiNumSliceGroups > 1  &&      pPps->uiSliceGroupMapType >= 3 &&      pPps->uiSliceGroupMapType <= 5) {    int32_t iNumBits;    if (pPps->uiSliceGroupChangeRate) {      iNumBits = WELS_CEILLOG2 (1 + pPps->uiPicSizeInMapUnits / pPps->uiSliceGroupChangeRate);      BsWriteBits (pBs, iNumBits, pSliceHeader->iSliceGroupChangeCycle);    }  }#endif//!DISABLE_FMO_FEATURE   if (false) {    BsWriteOneBit (pBs, pSliceHeadExt->bSliceSkipFlag);    if (pSliceHeadExt->bSliceSkipFlag) {      BsWriteUE (pBs, pSliceHeadExt->uiNumMbsInSlice - 1);    } else {      BsWriteOneBit (pBs, pSliceHeadExt->bAdaptiveBaseModeFlag);      if (!pSliceHeadExt->bAdaptiveBaseModeFlag) {        BsWriteOneBit (pBs, pSliceHeadExt->bDefaultBaseModeFlag);      }       if (!pSliceHeadExt->bDefaultBaseModeFlag) {        BsWriteOneBit (pBs, 0);        BsWriteOneBit (pBs, 0);      }       BsWriteOneBit (pBs, pSliceHeadExt->bAdaptiveResidualPredFlag);      if (!pSliceHeadExt->bAdaptiveResidualPredFlag) {        BsWriteOneBit (pBs, 0);      }    }    if (1 == pSubSps->sSpsSvcExt.bAdaptiveTcoeffLevelPredFlag) {      BsWriteOneBit (pBs, pSliceHeadExt->bTcoeffLevelPredFlag);    }   }   if (!pSubSps->sSpsSvcExt.bSliceHeaderRestrictionFlag) {    BsWriteBits (pBs, 4, 0);    BsWriteBits (pBs, 4, 15);  }} //only BaseLayer inter MB and SpatialLayer (uiQualityId = 0) inter MB calling this pFunc.//only for inter partvoid WelsInterMbEncode (sWelsEncCtx* pEncCtx, SSlice* pSlice, SMB* pCurMb) {  SMbCache* pMbCache = &pSlice->sMbCacheInfo;   WelsDctMb (pMbCache->pCoeffLevel,  pMbCache->SPicData.pEncMb[0], pEncCtx->pCurDqLayer->iEncStride[0],             pMbCache->pMemPredLuma, pEncCtx->pFuncList->pfDctFourT4);  WelsEncInterY (pEncCtx->pFuncList, pCurMb, pMbCache);}  //only BaseLayer inter MB and SpatialLayer (uiQualityId = 0) inter MB calling this pFunc.//only for I SSlicevoid WelsIMbChromaEncode (sWelsEncCtx* pEncCtx, SMB* pCurMb, SMbCache* pMbCache) {  SWelsFuncPtrList* pFunc	= pEncCtx->pFuncList;  SDqLayer* pCurLayer			= pEncCtx->pCurDqLayer;  const int32_t kiEncStride	= pCurLayer->iEncStride[1];  const int32_t kiCsStride		= pCurLayer->iCsStride[1];  int16_t* pCurRS				= pMbCache->pCoeffLevel;  uint8_t* pBestPred			= pMbCache->pBestPredIntraChroma;  uint8_t* pCsCb				= pMbCache->SPicData.pCsMb[1];  uint8_t* pCsCr				= pMbCache->SPicData.pCsMb[2];   //cb  pFunc->pfDctFourT4 (pCurRS,    pMbCache->SPicData.pEncMb[1], kiEncStride, pBestPred,    8);  WelsEncRecUV (pFunc, pCurMb, pMbCache, pCurRS,    1);  pFunc->pfIDctFourT4 (pCsCb, kiCsStride, pBestPred,    8, pCurRS);   //cr  pFunc->pfDctFourT4 (pCurRS + 64, pMbCache->SPicData.pEncMb[2], kiEncStride, pBestPred + 64, 8);  WelsEncRecUV (pFunc, pCurMb, pMbCache, pCurRS + 64, 2);  pFunc->pfIDctFourT4 (pCsCr, kiCsStride, pBestPred + 64, 8, pCurRS + 64);}  //only BaseLayer inter MB and SpatialLayer (uiQualityId = 0) inter MB calling this pFunc.//for P SSlice (intra part + inter part)void WelsPMbChromaEncode (sWelsEncCtx* pEncCtx, SSlice* pSlice, SMB* pCurMb) {  SWelsFuncPtrList* pFunc	= pEncCtx->pFuncList;  SDqLayer* pCurLayer			= pEncCtx->pCurDqLayer;  const int32_t kiEncStride	= pCurLayer->iEncStride[1];  SMbCache* pMbCache			= &pSlice->sMbCacheInfo;  int16_t* pCurRS				= pMbCache->pCoeffLevel + 256;  uint8_t* pBestPred			= pMbCache->pMemPredChroma;   pFunc->pfDctFourT4 (pCurRS,		pMbCache->SPicData.pEncMb[1],	kiEncStride,		pBestPred,		8);  pFunc->pfDctFourT4 (pCurRS + 64,	pMbCache->SPicData.pEncMb[2],	kiEncStride,		pBestPred + 64,	8);   WelsEncRecUV (pFunc, pCurMb, pMbCache, pCurRS, 1);  WelsEncRecUV (pFunc, pCurMb, pMbCache, pCurRS + 64, 2);} void OutputPMbWithoutConstructCsRsNoCopy (sWelsEncCtx* pCtx, SDqLayer* pDq, SSlice* pSlice, SMB* pMb) {  if (IS_INTER (pMb->uiMbType) || IS_I_BL (pMb->uiMbType)) {	//intra have been reconstructed, NO COPY from CS to pDecPic--    SMbCache* pMbCache			= &pSlice->sMbCacheInfo;    uint8_t* pDecY				= pMbCache->SPicData.pDecMb[0];    uint8_t* pDecU				= pMbCache->SPicData.pDecMb[1];    uint8_t* pDecV				= pMbCache->SPicData.pDecMb[2];    int16_t* pScaledTcoeff		= pMbCache->pCoeffLevel;    const int32_t kiDecStrideLuma	= pDq->pDecPic->iLineSize[0];    const int32_t kiDecStrideChroma	= pDq->pDecPic->iLineSize[1];    PIDctFunc pfIdctFour4x4				= pCtx->pFuncList->pfIDctFourT4;     WelsIDctT4RecOnMb (pDecY, kiDecStrideLuma, pDecY, kiDecStrideLuma, pScaledTcoeff,  pfIdctFour4x4);    pfIdctFour4x4 (pDecU, kiDecStrideChroma, pDecU, kiDecStrideChroma, pScaledTcoeff + 256);    pfIdctFour4x4 (pDecV, kiDecStrideChroma, pDecV, kiDecStrideChroma, pScaledTcoeff + 320);  }} void UpdateQpForOverflow (SMB* pCurMb, uint8_t kuiChromaQpIndexOffset) {  pCurMb->uiLumaQp += DELTA_QP;  pCurMb->uiChromaQp = g_kuiChromaQpTable[CLIP3_QP_0_51 (pCurMb->uiLumaQp + kuiChromaQpIndexOffset)];}// for intra non-dynamic pSlice//encapsulate two kinds of reconstruction://first. store base or highest Dependency Layer with only one quality (without CS RS reconstruction)//second. lower than highest Dependency Layer, and for every Dependency Layer with one quality layer(single layer)int32_t WelsISliceMdEnc (sWelsEncCtx* pEncCtx, SSlice* pSlice) { //pMd + encoding  SDqLayer* pCurLayer				= pEncCtx->pCurDqLayer;  SSliceCtx* pSliceCtx		= pCurLayer->pSliceEncCtx;  SMbCache* pMbCache				= &pSlice->sMbCacheInfo;  SSliceHeaderExt* pSliceHdExt	= &pSlice->sSliceHeaderExt;  SMB* pMbList						= pCurLayer->sMbDataP;  SMB* pCurMb						= NULL;  const int32_t kiSliceFirstMbXY	= pSliceHdExt->sSliceHeader.iFirstMbInSlice;  int32_t iNextMbIdx				= kiSliceFirstMbXY;  const int32_t kiTotalNumMb		= pCurLayer->iMbWidth * pCurLayer->iMbHeight;  int32_t iCurMbIdx				= 0, iNumMbCoded = 0;  const int32_t kiSliceIdx			= pSlice->uiSliceIdx;  const uint8_t kuiChromaQpIndexOffset = pCurLayer->sLayerInfo.pPpsP->uiChromaQpIndexOffset;   SWelsMD sMd;  int32_t iEncReturn = ENC_RETURN_SUCCESS;  SDynamicSlicingStack sDss;  if (pEncCtx->pSvcParam->iEntropyCodingModeFlag) {    WelsInitSliceCabac (pEncCtx, pSlice);  }  for (; ;) {

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