EncGOP.cpp

    picHeader->setPicIntraSliceAllowedFlag(false);
#if ER_CHROMA_QP_WCG_PPS
    // th this is a hot fix for the choma qp control
    if( m_pcEncLib->getWCGChromaQPControl().isEnabled() && m_pcEncLib->getSwitchPOC() != -1 )
    {
      static int usePPS = 0; /* TODO: MT */
      if( pocCurr == m_pcEncLib->getSwitchPOC() )
      {
        usePPS = 1;
      }
      const PPS *pPPS = m_pcEncLib->getPPS(usePPS);
      // replace the pps with a more appropriated one
      pcPic->cs->pps = pPPS;
    }
#endif

    // create objects based on the picture size
    const int picWidth = pcPic->cs->pps->getPicWidthInLumaSamples();
    const int picHeight = pcPic->cs->pps->getPicHeightInLumaSamples();
    const int maxCUWidth = pcPic->cs->sps->getMaxCUWidth();
    const int maxCUHeight = pcPic->cs->sps->getMaxCUHeight();
    const ChromaFormat chromaFormatIDC = pcPic->cs->sps->getChromaFormatIdc();
    const int maxTotalCUDepth = floorLog2(maxCUWidth) - pcPic->cs->sps->getLog2MinCodingBlockSize();

    m_pcSliceEncoder->create( picWidth, picHeight, chromaFormatIDC, maxCUWidth, maxCUHeight, maxTotalCUDepth );

#if ENABLE_SPLIT_PARALLELISM
    pcPic->scheduler.init( pcPic->cs->pcv->heightInCtus, pcPic->cs->pcv->widthInCtus, 1                          , 0                             , m_pcCfg->getNumSplitThreads() );
#endif
    pcPic->createTempBuffers( pcPic->cs->pps->pcv->maxCUWidth );
    pcPic->cs->createCoeffs((bool)pcPic->cs->sps->getPLTMode());

    //  Slice data initialization
    pcPic->clearSliceBuffer();
    pcPic->allocateNewSlice();
    m_pcSliceEncoder->setSliceSegmentIdx(0);

    m_pcSliceEncoder->initEncSlice(pcPic, iPOCLast, pocCurr, iGOPid, pcSlice, isField
      , isEncodeLtRef
    );

    DTRACE_UPDATE( g_trace_ctx, ( std::make_pair( "poc", pocCurr ) ) );
    DTRACE_UPDATE( g_trace_ctx, ( std::make_pair( "final", 0 ) ) );

#if !SHARP_LUMA_DELTA_QP
    //Set Frame/Field coding
    pcPic->fieldPic = isField;
#endif

    pcSlice->setLastIDR(m_iLastIDR);
    pcSlice->setIndependentSliceIdx(0);

    if(pcSlice->getSliceType()==B_SLICE&&m_pcCfg->getGOPEntry(iGOPid).m_sliceType=='P')
    {
      pcSlice->setSliceType(P_SLICE);
    }
    if(pcSlice->getSliceType()==B_SLICE&&m_pcCfg->getGOPEntry(iGOPid).m_sliceType=='I')
    {
      pcSlice->setSliceType(I_SLICE);
    }
    pcSlice->setTLayer(m_pcCfg->getGOPEntry(iGOPid).m_temporalId);

    // Set the nal unit type
    pcSlice->setNalUnitType(getNalUnitType(pocCurr, m_iLastIDR, isField));
    // set two flags according to slice type presented in the picture
    if (pcSlice->getSliceType() != I_SLICE)
    {
      picHeader->setPicInterSliceAllowedFlag(true);
    }
    if (pcSlice->getSliceType() == I_SLICE)
    {
      picHeader->setPicIntraSliceAllowedFlag(true);
    }
    picHeader->setGdrOrIrapPicFlag(picHeader->getGdrPicFlag() || pcSlice->isIRAP());

    if (m_pcCfg->getEfficientFieldIRAPEnabled())
    {
      if ( pcSlice->getNalUnitType() == NAL_UNIT_CODED_SLICE_IDR_W_RADL
        || pcSlice->getNalUnitType() == NAL_UNIT_CODED_SLICE_IDR_N_LP
        || pcSlice->getNalUnitType() == NAL_UNIT_CODED_SLICE_CRA)  // IRAP picture
      {
        m_associatedIRAPType = pcSlice->getNalUnitType();
        m_associatedIRAPPOC = pocCurr;
      }
      pcSlice->setAssociatedIRAPType(m_associatedIRAPType);
      pcSlice->setAssociatedIRAPPOC(m_associatedIRAPPOC);
    }

    pcSlice->decodingRefreshMarking(m_pocCRA, m_bRefreshPending, rcListPic, m_pcCfg->getEfficientFieldIRAPEnabled());
    if (m_pcCfg->getUseCompositeRef() && isEncodeLtRef)
    {
      setUseLTRef(true);
      setPrepareLTRef(false);
      setNewestBgPOC(pocCurr);
      setLastLTRefPoc(pocCurr);
    }
    else if (m_pcCfg->getUseCompositeRef() && getLastLTRefPoc() >= 0 && getEncodedLTRef()==false && !getPicBg()->getSpliceFull() && (pocCurr - getLastLTRefPoc()) > (m_pcCfg->getFrameRate() * 2))
    {
      setUseLTRef(false);
      setPrepareLTRef(false);
      setEncodedLTRef(true);
      setNewestBgPOC(-1);
      setLastLTRefPoc(-1);
    }

    if (m_pcCfg->getUseCompositeRef() && m_picBg->getSpliceFull() && getUseLTRef())
    {
      m_pcEncLib->selectReferencePictureList(pcSlice, pocCurr, iGOPid, m_bgPOC);
    }
    else
    {
      m_pcEncLib->selectReferencePictureList(pcSlice, pocCurr, iGOPid, -1);
    }
    if (!m_pcCfg->getEfficientFieldIRAPEnabled())
    {
      if ( pcSlice->getNalUnitType() == NAL_UNIT_CODED_SLICE_IDR_W_RADL
        || pcSlice->getNalUnitType() == NAL_UNIT_CODED_SLICE_IDR_N_LP
        || pcSlice->getNalUnitType() == NAL_UNIT_CODED_SLICE_CRA)  // IRAP picture
      {
        m_associatedIRAPType = pcSlice->getNalUnitType();
        m_associatedIRAPPOC = pocCurr;
      }
      pcSlice->setAssociatedIRAPType(m_associatedIRAPType);
      pcSlice->setAssociatedIRAPPOC(m_associatedIRAPPOC);
    }

    pcSlice->setEnableDRAPSEI(m_pcEncLib->getDependentRAPIndicationSEIEnabled());
    if (m_pcEncLib->getDependentRAPIndicationSEIEnabled())
    {
      // Only mark the picture as DRAP if all of the following applies:
      //  1) DRAP indication SEI messages are enabled
      //  2) The current picture is not an intra picture
      //  3) The current picture is in the DRAP period
      //  4) The current picture is a trailing picture
      pcSlice->setDRAP(m_pcEncLib->getDependentRAPIndicationSEIEnabled() && m_pcEncLib->getDrapPeriod() > 0 && !pcSlice->isIntra() &&
              pocCurr % m_pcEncLib->getDrapPeriod() == 0 && pocCurr > pcSlice->getAssociatedIRAPPOC());

      if (pcSlice->isDRAP())
      {
        int pocCycle = 1 << (pcSlice->getSPS()->getBitsForPOC());
        int deltaPOC = pocCurr > pcSlice->getAssociatedIRAPPOC() ? pocCurr - pcSlice->getAssociatedIRAPPOC() : pocCurr - ( pcSlice->getAssociatedIRAPPOC() & (pocCycle -1) );
        CHECK(deltaPOC > (pocCycle >> 1), "Use a greater value for POC wraparound to enable a POC distance between IRAP and DRAP of " << deltaPOC << ".");
        m_latestDRAPPOC = pocCurr;
        pcSlice->setTLayer(0); // Force DRAP picture to have temporal layer 0
      }
      pcSlice->setLatestDRAPPOC(m_latestDRAPPOC);
      pcSlice->setUseLTforDRAP(false); // When set, sets the associated IRAP as long-term in RPL0 at slice level, unless the associated IRAP is already included in RPL0 or RPL1 defined in SPS

      PicList::iterator iterPic = rcListPic.begin();
      Picture *rpcPic;
      while (iterPic != rcListPic.end())
      {
        rpcPic = *(iterPic++);
        if ( pcSlice->isDRAP() && rpcPic->getPOC() != pocCurr )
        {
            rpcPic->precedingDRAP = true;
        }
        else if ( !pcSlice->isDRAP() && rpcPic->getPOC() == pocCurr )
        {
          rpcPic->precedingDRAP = false;
        }
      }
    }

    if (pcSlice->checkThatAllRefPicsAreAvailable(rcListPic, pcSlice->getRPL0(), 0, false) != 0 || pcSlice->checkThatAllRefPicsAreAvailable(rcListPic, pcSlice->getRPL1(), 1, false) != 0 ||
        (m_pcEncLib->getDependentRAPIndicationSEIEnabled() && !pcSlice->isIRAP() && ( pcSlice->isDRAP() || !pcSlice->isPOCInRefPicList(pcSlice->getRPL0(), pcSlice->getAssociatedIRAPPOC())) )
      || ( !pcSlice->isIRAP() && pcSlice->getPic()->cs->vps && m_pcEncLib->getNumRefLayers( pcSlice->getPic()->cs->vps->getGeneralLayerIdx( m_pcEncLib->getLayerId() ) ) )
      )
    {
      xCreateExplicitReferencePictureSetFromReference( pcSlice, rcListPic, pcSlice->getRPL0(), pcSlice->getRPL1() );
    }

    pcSlice->applyReferencePictureListBasedMarking( rcListPic, pcSlice->getRPL0(), pcSlice->getRPL1(), pcSlice->getPic()->layerId, *(pcSlice->getPPS()));

    if(pcSlice->getTLayer() > 0
      && !(pcSlice->getNalUnitType() == NAL_UNIT_CODED_SLICE_RADL     // Check if not a leading picture
        || pcSlice->getNalUnitType() == NAL_UNIT_CODED_SLICE_RASL)
        )
    {
    if (pcSlice->isStepwiseTemporalLayerSwitchingPointCandidate(rcListPic))
      {
        bool isSTSA=true;


        for(int ii=0;(ii<m_pcCfg->getGOPSize() && isSTSA==true);ii++)
        {
          int lTid = m_pcCfg->getRPLEntry(0, ii).m_temporalId;

          if (lTid == pcSlice->getTLayer())
          {
            const ReferencePictureList* rpl0 = pcSlice->getSPS()->getRPLList0()->getReferencePictureList(ii);
            for (int jj = 0; jj < pcSlice->getRPL0()->getNumberOfActivePictures(); jj++)
            {
              int tPoc = pcSlice->getPOC() - rpl0->getRefPicIdentifier(jj);
              int kk = 0;
              for (kk = 0; kk<m_pcCfg->getGOPSize(); kk++)
              {
                if (m_pcCfg->getRPLEntry(0, kk).m_POC == tPoc)
                {
                  break;
                }
              }
              int tTid = m_pcCfg->getRPLEntry(0, kk).m_temporalId;
              if (tTid >= pcSlice->getTLayer())
              {
                isSTSA = false;
                break;
              }
            }
            const ReferencePictureList* rpl1 = pcSlice->getSPS()->getRPLList1()->getReferencePictureList(ii);
            for (int jj = 0; jj < pcSlice->getRPL1()->getNumberOfActivePictures(); jj++)
            {
              int tPoc = pcSlice->getPOC() - rpl1->getRefPicIdentifier(jj);
              int kk = 0;
              for (kk = 0; kk<m_pcCfg->getGOPSize(); kk++)
              {
                if (m_pcCfg->getRPLEntry(1, kk).m_POC == tPoc)
                {
                  break;
                }
              }
              int tTid = m_pcCfg->getRPLEntry(1, kk).m_temporalId;
              if (tTid >= pcSlice->getTLayer())
              {
                isSTSA = false;
                break;
              }
            }
          }
        }
        if(isSTSA==true)
        {
          pcSlice->setNalUnitType(NAL_UNIT_CODED_SLICE_STSA);
        }
      }
    }

    if (m_pcCfg->getUseCompositeRef() && getUseLTRef() && (pocCurr > getLastLTRefPoc()))
    {
      pcSlice->setNumRefIdx(REF_PIC_LIST_0, (pcSlice->isIntra()) ? 0 : min(m_pcCfg->getRPLEntry(0, iGOPid).m_numRefPicsActive + 1, pcSlice->getRPL0()->getNumberOfActivePictures()));
      pcSlice->setNumRefIdx(REF_PIC_LIST_1, (!pcSlice->isInterB()) ? 0 : min(m_pcCfg->getRPLEntry(1, iGOPid).m_numRefPicsActive + 1, pcSlice->getRPL1()->getNumberOfActivePictures()));
    }
    else
    {
      pcSlice->setNumRefIdx(REF_PIC_LIST_0, (pcSlice->isIntra()) ? 0 : pcSlice->getRPL0()->getNumberOfActivePictures());
      pcSlice->setNumRefIdx(REF_PIC_LIST_1, (!pcSlice->isInterB()) ? 0 : pcSlice->getRPL1()->getNumberOfActivePictures());
    }
    if (m_pcCfg->getUseCompositeRef() && getPrepareLTRef()) {
      arrangeCompositeReference(pcSlice, rcListPic, pocCurr);
    }
    //  Set reference list
    pcSlice->constructRefPicList(rcListPic);

    xPicInitHashME( pcPic, pcSlice->getPPS(), rcListPic );

    if( m_pcCfg->getUseAMaxBT() )
    {
      if( !pcSlice->isIRAP() )
      {
        int refLayer = pcSlice->getDepth();
        if( refLayer > 9 ) refLayer = 9; // Max layer is 10

        if( m_bInitAMaxBT && pcSlice->getPOC() > m_uiPrevISlicePOC )
        {
          ::memset( m_uiBlkSize, 0, sizeof( m_uiBlkSize ) );
          ::memset( m_uiNumBlk,  0, sizeof( m_uiNumBlk ) );
          m_bInitAMaxBT = false;
        }

        if( refLayer >= 0 && m_uiNumBlk[refLayer] != 0 )
        {
          picHeader->setSplitConsOverrideFlag(true);
          double dBlkSize = sqrt( ( double ) m_uiBlkSize[refLayer] / m_uiNumBlk[refLayer] );
          unsigned int newMaxBtSize = picHeader->getMaxBTSize(pcSlice->getSliceType(), CHANNEL_TYPE_LUMA);
          if( dBlkSize < AMAXBT_TH32 )
          {
            newMaxBtSize = 32;
          }
          else if( dBlkSize < AMAXBT_TH64 )
          {
            newMaxBtSize = 64;
          }
          else
          {
            newMaxBtSize = 128;
          }
          newMaxBtSize = Clip3(picHeader->getMinQTSize(pcSlice->getSliceType()), pcPic->cs->sps->getCTUSize(), newMaxBtSize);
          picHeader->setMaxBTSize(1, newMaxBtSize);

          m_uiBlkSize[refLayer] = 0;
          m_uiNumBlk [refLayer] = 0;
        }
      }
      else
      {
        if( m_bInitAMaxBT )
        {
          ::memset( m_uiBlkSize, 0, sizeof( m_uiBlkSize ) );
          ::memset( m_uiNumBlk,  0, sizeof( m_uiNumBlk ) );
        }

        m_uiPrevISlicePOC = pcSlice->getPOC();
        m_bInitAMaxBT = true;
      }
    }

    //  Slice info. refinement
    if ( (pcSlice->getSliceType() == B_SLICE) && (pcSlice->getNumRefIdx(REF_PIC_LIST_1) == 0) )
    {
      pcSlice->setSliceType ( P_SLICE );
    }

    xUpdateRasInit( pcSlice );

    if ( pcSlice->getPendingRasInit() )
    {
      // this ensures that independently encoded bitstream chunks can be combined to bit-equal
      pcSlice->setEncCABACTableIdx( pcSlice->getSliceType() );
    }
    else
    {
      pcSlice->setEncCABACTableIdx( m_pcSliceEncoder->getEncCABACTableIdx() );
    }

    if (pcSlice->getSliceType() == B_SLICE)
    {

      bool bLowDelay = true;
      int  iCurrPOC  = pcSlice->getPOC();
      int iRefIdx = 0;

      for (iRefIdx = 0; iRefIdx < pcSlice->getNumRefIdx(REF_PIC_LIST_0) && bLowDelay; iRefIdx++)
      {
        if ( pcSlice->getRefPic(REF_PIC_LIST_0, iRefIdx)->getPOC() > iCurrPOC )
        {
          bLowDelay = false;
        }
      }
      for (iRefIdx = 0; iRefIdx < pcSlice->getNumRefIdx(REF_PIC_LIST_1) && bLowDelay; iRefIdx++)
      {
        if ( pcSlice->getRefPic(REF_PIC_LIST_1, iRefIdx)->getPOC() > iCurrPOC )
        {
          bLowDelay = false;
        }
      }

      pcSlice->setCheckLDC(bLowDelay);
    }
    else
    {
      pcSlice->setCheckLDC(true);
    }


    //-------------------------------------------------------------
    pcSlice->setRefPOCList();


    pcSlice->setList1IdxToList0Idx();

    if (m_pcEncLib->getTMVPModeId() == 2)
    {
      if (iGOPid == 0) // first picture in SOP (i.e. forward B)
      {
        picHeader->setEnableTMVPFlag(0);
      }
      else
      {
        // Note: pcSlice->getColFromL0Flag() is assumed to be always 0 and getcolRefIdx() is always 0.
        picHeader->setEnableTMVPFlag(1);
      }
    }
    else if (m_pcEncLib->getTMVPModeId() == 1)
    {
      picHeader->setEnableTMVPFlag(1);
    }
    else
    {
      picHeader->setEnableTMVPFlag(0);
    }

    // disable TMVP when current picture is the only ref picture
    if (pcSlice->isIRAP() && pcSlice->getSPS()->getIBCFlag())
    {
      picHeader->setEnableTMVPFlag(0);
    }

    if( pcSlice->getSliceType() != I_SLICE && picHeader->getEnableTMVPFlag() )
    {
      int colRefIdxL0 = -1, colRefIdxL1 = -1;

      for( int refIdx = 0; refIdx < pcSlice->getNumRefIdx( REF_PIC_LIST_0 ); refIdx++ )
      {
        if( pcSlice->getRefPic( REF_PIC_LIST_0, refIdx )->isRefScaled( pcSlice->getPPS() ) == false )
        {
          colRefIdxL0 = refIdx;
          break;
        }
      }

      if( pcSlice->getSliceType() == B_SLICE )
      {
        for( int refIdx = 0; refIdx < pcSlice->getNumRefIdx( REF_PIC_LIST_1 ); refIdx++ )
        {
          if( pcSlice->getRefPic( REF_PIC_LIST_1, refIdx )->isRefScaled( pcSlice->getPPS() ) == false )
          {
            colRefIdxL1 = refIdx;
            break;
          }
        }
      }

      if( colRefIdxL0 >= 0 && colRefIdxL1 >= 0 )
      {
        const Picture *refPicL0 = pcSlice->getRefPic( REF_PIC_LIST_0, colRefIdxL0 );
        if( !refPicL0->slices.size() )
        {
          refPicL0 = refPicL0->unscaledPic;
        }

        const Picture *refPicL1 = pcSlice->getRefPic( REF_PIC_LIST_1, colRefIdxL1 );
        if( !refPicL1->slices.size() )
        {
          refPicL1 = refPicL1->unscaledPic;
        }

        const uint32_t uiColFromL0 = refPicL0->slices[0]->getSliceQp() > refPicL1->slices[0]->getSliceQp();
        picHeader->setPicColFromL0Flag( uiColFromL0 );
        pcSlice->setColFromL0Flag( uiColFromL0 );
        pcSlice->setColRefIdx( uiColFromL0 ? colRefIdxL0 : colRefIdxL1 );
        picHeader->setColRefIdx( uiColFromL0 ? colRefIdxL0 : colRefIdxL1 );
      }
      else if( colRefIdxL0 < 0 && colRefIdxL1 >= 0 )
      {
        picHeader->setPicColFromL0Flag( false );
        pcSlice->setColFromL0Flag( false );
        pcSlice->setColRefIdx( colRefIdxL1 );
        picHeader->setColRefIdx( colRefIdxL1 );
      }
      else if( colRefIdxL0 >= 0 && colRefIdxL1 < 0 )
      {
        picHeader->setPicColFromL0Flag( true );
        pcSlice->setColFromL0Flag( true );
        pcSlice->setColRefIdx( colRefIdxL0 );
        picHeader->setColRefIdx( colRefIdxL0 );
      }
      else
      {
        picHeader->setEnableTMVPFlag( 0 );
      }
    }

    pcSlice->scaleRefPicList( scaledRefPic, pcPic->cs->picHeader, m_pcEncLib->getApss(), picHeader->getLmcsAPS(), picHeader->getScalingListAPS(), false );

    // set adaptive search range for non-intra-slices
    if (m_pcCfg->getUseASR() && !pcSlice->isIRAP())
    {
      m_pcSliceEncoder->setSearchRange(pcSlice);
    }

    bool bGPBcheck=false;
    if ( pcSlice->getSliceType() == B_SLICE)
    {
      if ( pcSlice->getNumRefIdx(RefPicList( 0 ) ) == pcSlice->getNumRefIdx(RefPicList( 1 ) ) )
      {
        bGPBcheck=true;
        int i;
        for ( i=0; i < pcSlice->getNumRefIdx(RefPicList( 1 ) ); i++ )
        {
          if ( pcSlice->getRefPOC(RefPicList(1), i) != pcSlice->getRefPOC(RefPicList(0), i) )
          {
            bGPBcheck=false;
            break;
          }
        }
      }
    }
    if(bGPBcheck)
    {
      picHeader->setMvdL1ZeroFlag(true);
    }
    else
    {
      picHeader->setMvdL1ZeroFlag(false);
    }

    if ( pcSlice->getSPS()->getUseSMVD() && pcSlice->getCheckLDC() == false
      && picHeader->getMvdL1ZeroFlag() == false
      )
    {
      int currPOC = pcSlice->getPOC();

      int forwardPOC = currPOC;
      int backwardPOC = currPOC;
      int ref = 0, refIdx0 = -1, refIdx1 = -1;

      // search nearest forward POC in List 0
      for ( ref = 0; ref < pcSlice->getNumRefIdx( REF_PIC_LIST_0 ); ref++ )
      {
        int poc = pcSlice->getRefPic( REF_PIC_LIST_0, ref )->getPOC();
        const bool isRefLongTerm = pcSlice->getRefPic(REF_PIC_LIST_0, ref)->longTerm;
        if ( poc < currPOC && (poc > forwardPOC || refIdx0 == -1) && !isRefLongTerm )
        {
          forwardPOC = poc;
          refIdx0 = ref;
        }
      }

      // search nearest backward POC in List 1
      for ( ref = 0; ref < pcSlice->getNumRefIdx( REF_PIC_LIST_1 ); ref++ )
      {
        int poc = pcSlice->getRefPic( REF_PIC_LIST_1, ref )->getPOC();
        const bool isRefLongTerm = pcSlice->getRefPic(REF_PIC_LIST_1, ref)->longTerm;
        if ( poc > currPOC && (poc < backwardPOC || refIdx1 == -1) && !isRefLongTerm )
        {
          backwardPOC = poc;
          refIdx1 = ref;
        }
      }

      if ( !(forwardPOC < currPOC && backwardPOC > currPOC) )
      {
        forwardPOC = currPOC;
        backwardPOC = currPOC;
        refIdx0 = -1;
        refIdx1 = -1;

        // search nearest backward POC in List 0
        for ( ref = 0; ref < pcSlice->getNumRefIdx( REF_PIC_LIST_0 ); ref++ )
        {
          int poc = pcSlice->getRefPic( REF_PIC_LIST_0, ref )->getPOC();
          const bool isRefLongTerm = pcSlice->getRefPic(REF_PIC_LIST_0, ref)->longTerm;
          if ( poc > currPOC && (poc < backwardPOC || refIdx0 == -1) && !isRefLongTerm )
          {
            backwardPOC = poc;
            refIdx0 = ref;
          }
        }

        // search nearest forward POC in List 1
        for ( ref = 0; ref < pcSlice->getNumRefIdx( REF_PIC_LIST_1 ); ref++ )
        {
          int poc = pcSlice->getRefPic( REF_PIC_LIST_1, ref )->getPOC();
          const bool isRefLongTerm = pcSlice->getRefPic(REF_PIC_LIST_1, ref)->longTerm;
          if ( poc < currPOC && (poc > forwardPOC || refIdx1 == -1) && !isRefLongTerm )
          {
            forwardPOC = poc;
            refIdx1 = ref;
          }
        }
      }

      if ( forwardPOC < currPOC && backwardPOC > currPOC )
      {
        pcSlice->setBiDirPred( true, refIdx0, refIdx1 );
      }
      else
      {
        pcSlice->setBiDirPred( false, -1, -1 );
      }
    }
    else
    {
      pcSlice->setBiDirPred( false, -1, -1 );
    }

    double lambda            = 0.0;
    int actualHeadBits       = 0;
    int actualTotalBits      = 0;
    int estimatedBits        = 0;
    int tmpBitsBeforeWriting = 0;

    xPicInitRateControl(estimatedBits, iGOPid, lambda, pcPic, pcSlice);

    uint32_t uiNumSliceSegments = 1;

    {
      pcSlice->setDefaultClpRng( *pcSlice->getSPS() );
    }

    // Allocate some coders, now the number of tiles are known.
    const uint32_t numberOfCtusInFrame = pcPic->cs->pcv->sizeInCtus;
    const int numSubstreamsColumns = pcSlice->getPPS()->getNumTileColumns();
    const int numSubstreamRows     = pcSlice->getSPS()->getEntropyCodingSyncEnabledFlag() ? pcPic->cs->pcv->heightInCtus : (pcSlice->getPPS()->getNumTileRows());
    const int numSubstreams        = std::max<int> (numSubstreamRows * numSubstreamsColumns, (int) pcPic->cs->pps->getNumSlicesInPic());
    std::vector<OutputBitstream> substreamsOut(numSubstreams);

#if ENABLE_QPA
    pcPic->m_uEnerHpCtu.resize (numberOfCtusInFrame);
    pcPic->m_iOffsetCtu.resize (numberOfCtusInFrame);
#if ENABLE_QPA_SUB_CTU
    if (pcSlice->getPPS()->getUseDQP() && pcSlice->getCuQpDeltaSubdiv() > 0)
    {
      const PreCalcValues &pcv = *pcPic->cs->pcv;
      const unsigned   mtsLog2 = (unsigned)floorLog2(std::min (pcPic->cs->sps->getMaxTbSize(), pcv.maxCUWidth));
      pcPic->m_subCtuQP.resize ((pcv.maxCUWidth >> mtsLog2) * (pcv.maxCUHeight >> mtsLog2));
    }
#endif
#endif
    if (pcSlice->getSPS()->getSAOEnabledFlag())
    {
      pcPic->resizeSAO( numberOfCtusInFrame, 0 );
      pcPic->resizeSAO( numberOfCtusInFrame, 1 );
    }

    // it is used for signalling during CTU mode decision, i.e. before ALF processing
    if( pcSlice->getSPS()->getALFEnabledFlag() )
    {
      pcPic->resizeAlfCtuEnableFlag( numberOfCtusInFrame );
      pcPic->resizeAlfCtuAlternative( numberOfCtusInFrame );
      pcPic->resizeAlfCtbFilterIndex(numberOfCtusInFrame);
    }

    bool decPic = false;
    bool encPic = false;
    // test if we can skip the picture entirely or decode instead of encoding
    trySkipOrDecodePicture( decPic, encPic, *m_pcCfg, pcPic );

    pcPic->cs->slice = pcSlice; // please keep this
#if ENABLE_QPA
    if (pcSlice->getPPS()->getSliceChromaQpFlag() && CS::isDualITree (*pcSlice->getPic()->cs) && !m_pcCfg->getUsePerceptQPA() && (m_pcCfg->getSliceChromaOffsetQpPeriodicity() == 0))
#else
    if (pcSlice->getPPS()->getSliceChromaQpFlag() && CS::isDualITree (*pcSlice->getPic()->cs))
#endif
    {
      // overwrite chroma qp offset for dual tree
      pcSlice->setSliceChromaQpDelta(COMPONENT_Cb, m_pcCfg->getChromaCbQpOffsetDualTree());
      pcSlice->setSliceChromaQpDelta(COMPONENT_Cr, m_pcCfg->getChromaCrQpOffsetDualTree());
      if (pcSlice->getSPS()->getJointCbCrEnabledFlag())
      {
        pcSlice->setSliceChromaQpDelta(JOINT_CbCr, m_pcCfg->getChromaCbCrQpOffsetDualTree());
      }
      m_pcSliceEncoder->setUpLambda(pcSlice, pcSlice->getLambdas()[0], pcSlice->getSliceQp());
    }

    xPicInitLMCS(pcPic, picHeader, pcSlice);

    if( pcSlice->getSPS()->getScalingListFlag() && m_pcCfg->getUseScalingListId() == SCALING_LIST_FILE_READ )
    {
      picHeader->setExplicitScalingListEnabledFlag( true );
      pcSlice->setExplicitScalingListUsed( true );

      int apsId = std::min<int>( 7, m_pcEncLib->getVPS() == nullptr ? 0 : m_pcEncLib->getVPS()->getGeneralLayerIdx( m_pcEncLib->getLayerId() ) );
      picHeader->setScalingListAPSId( apsId );

      ParameterSetMap<APS> *apsMap = m_pcEncLib->getApsMap();
      APS*  scalingListAPS = apsMap->getPS( ( apsId << NUM_APS_TYPE_LEN ) + SCALING_LIST_APS );
      assert( scalingListAPS != NULL );
      picHeader->setScalingListAPS( scalingListAPS );
    }

    pcPic->cs->picHeader->setPic(pcPic);
    pcPic->cs->picHeader->setValid();
    if(pcPic->cs->sps->getFpelMmvdEnabledFlag())
    {
      // cannot set ph_fpel_mmvd_enabled_flag at slice level - need new picture-level version of checkDisFracMmvd algorithm?
      // m_pcSliceEncoder->checkDisFracMmvd( pcPic, 0, numberOfCtusInFrame );
      bool useIntegerMVD = (pcPic->lwidth()*pcPic->lheight() > 1920 * 1080);
      pcPic->cs->picHeader->setDisFracMMVD( useIntegerMVD );
    }
    if (pcSlice->getSPS()->getJointCbCrEnabledFlag())
    {
      m_pcSliceEncoder->setJointCbCrModes(*pcPic->cs, Position(0, 0), pcPic->cs->area.lumaSize());
    }
    if( encPic )
    // now compress (trial encode) the various slice segments (slices, and dependent slices)
    {
      DTRACE_UPDATE( g_trace_ctx, ( std::make_pair( "poc", pocCurr ) ) );
#if JVET_R0110_MIXED_LOSSLESS
      const std::vector<uint32_t> sliceLosslessArray = *(m_pcCfg->getSliceLosslessArray());
#endif

      for(uint32_t sliceIdx = 0; sliceIdx < pcPic->cs->pps->getNumSlicesInPic(); sliceIdx++ )
      {
        pcSlice->setSliceMap( pcPic->cs->pps->getSliceMap( sliceIdx ) );
        if( pcPic->cs->pps->getRectSliceFlag() )
        {
          Position firstCtu;
          firstCtu.x = pcSlice->getFirstCtuRsAddrInSlice() % pcPic->cs->pps->getPicWidthInCtu();
          firstCtu.y = pcSlice->getFirstCtuRsAddrInSlice() / pcPic->cs->pps->getPicWidthInCtu();
          int subPicIdx = NOT_VALID;
          for( int sp = 0; sp < pcPic->cs->pps->getNumSubPics(); sp++ )
          {
            if( pcPic->cs->pps->getSubPic( sp ).containsCtu( firstCtu ) )
            {
              subPicIdx = sp;
              break;
            }
          }
          CHECK( subPicIdx == NOT_VALID, "Sub-picture was not found" );

          pcSlice->setSliceSubPicId( pcPic->cs->pps->getSubPic( subPicIdx ).getSubPicID() );
        }
        if (pcPic->cs->sps->getUseLmcs())
        {
          pcSlice->setLmcsEnabledFlag(picHeader->getLmcsEnabledFlag());
          if (pcSlice->getSliceType() == I_SLICE)
          {
            //reshape original signal
            if (pcSlice->getLmcsEnabledFlag())
            {
              pcPic->getOrigBuf(COMPONENT_Y).rspSignal(m_pcReshaper->getFwdLUT());
              m_pcReshaper->setSrcReshaped(true);
              m_pcReshaper->setRecReshaped(true);
            }
            else
            {
              pcPic->getOrigBuf().copyFrom(pcPic->getTrueOrigBuf());
              m_pcReshaper->setSrcReshaped(false);
              m_pcReshaper->setRecReshaped(false);
            }
          }
        }

#if JVET_R0110_MIXED_LOSSLESS
        bool isLossless = false;
        if (m_pcCfg->getCostMode() == COST_LOSSLESS_CODING)
        {
          isLossless = (sliceLosslessArray[sliceIdx] != 0);
        }
        m_pcSliceEncoder->setLosslessSlice(pcPic, isLossless);
#endif

        m_pcSliceEncoder->precompressSlice( pcPic );
        m_pcSliceEncoder->compressSlice   ( pcPic, false, false );

        if(sliceIdx < pcPic->cs->pps->getNumSlicesInPic() - 1)
        {
          uint32_t independentSliceIdx = pcSlice->getIndependentSliceIdx();
          pcPic->allocateNewSlice();
          m_pcSliceEncoder->setSliceSegmentIdx      (uiNumSliceSegments);
          // prepare for next slice
          pcSlice = pcPic->slices[uiNumSliceSegments];
          CHECK(!(pcSlice->getPPS() != 0), "Unspecified error");
          pcSlice->copySliceInfo(pcPic->slices[uiNumSliceSegments - 1]);
          pcSlice->setSliceBits(0);
          independentSliceIdx++;
          pcSlice->setIndependentSliceIdx(independentSliceIdx);
          uiNumSliceSegments++;
        }
      }

      duData.clear();

      CodingStructure& cs = *pcPic->cs;
      pcSlice = pcPic->slices[0];

      if (cs.sps->getUseLmcs() && m_pcReshaper->getSliceReshaperInfo().getUseSliceReshaper())
      {
        picHeader->setLmcsEnabledFlag(true);
        int apsId = std::min<int>(3, m_pcEncLib->getVPS() == nullptr ? 0 : m_pcEncLib->getVPS()->getGeneralLayerIdx(m_pcEncLib->getLayerId()));
        picHeader->setLmcsAPSId(apsId);

        const PreCalcValues& pcv = *cs.pcv;
        for (uint32_t yPos = 0; yPos < pcv.lumaHeight; yPos += pcv.maxCUHeight)
        {
          for (uint32_t xPos = 0; xPos < pcv.lumaWidth; xPos += pcv.maxCUWidth)
          {
            const CodingUnit* cu = cs.getCU(Position(xPos, yPos), CHANNEL_TYPE_LUMA);
            if (cu->slice->getLmcsEnabledFlag())
            {
              const uint32_t width = (xPos + pcv.maxCUWidth > pcv.lumaWidth) ? (pcv.lumaWidth - xPos) : pcv.maxCUWidth;
              const uint32_t height = (yPos + pcv.maxCUHeight > pcv.lumaHeight) ? (pcv.lumaHeight - yPos) : pcv.maxCUHeight;
              const UnitArea area(cs.area.chromaFormat, Area(xPos, yPos, width, height));
              cs.getRecoBuf(area).get(COMPONENT_Y).rspSignal(m_pcReshaper->getInvLUT());
            }
          }
        }
        m_pcReshaper->setRecReshaped(false);
        pcPic->getOrigBuf().copyFrom(pcPic->getTrueOrigBuf());
      }

      // create SAO object based on the picture size
      if( pcSlice->getSPS()->getSAOEnabledFlag() )
      {
        const uint32_t widthInCtus = ( picWidth + maxCUWidth - 1 ) / maxCUWidth;
        const uint32_t heightInCtus = ( picHeight + maxCUHeight - 1 ) / maxCUHeight;
        const uint32_t numCtuInFrame = widthInCtus * heightInCtus;
        const uint32_t  log2SaoOffsetScaleLuma   = (uint32_t) std::max(0, pcSlice->getSPS()->getBitDepth(CHANNEL_TYPE_LUMA  ) - MAX_SAO_TRUNCATED_BITDEPTH);
        const uint32_t  log2SaoOffsetScaleChroma = (uint32_t) std::max(0, pcSlice->getSPS()->getBitDepth(CHANNEL_TYPE_CHROMA) - MAX_SAO_TRUNCATED_BITDEPTH);

        m_pcSAO->create( picWidth, picHeight, chromaFormatIDC, maxCUWidth, maxCUHeight, maxTotalCUDepth, log2SaoOffsetScaleLuma, log2SaoOffsetScaleChroma );
        m_pcSAO->destroyEncData();
        m_pcSAO->createEncData( m_pcCfg->getSaoCtuBoundary(), numCtuInFrame );
        m_pcSAO->setReshaper( m_pcReshaper );
      }

      if( pcSlice->getSPS()->getScalingListFlag() && m_pcCfg->getUseScalingListId() == SCALING_LIST_FILE_READ )
      {
        picHeader->setExplicitScalingListEnabledFlag(true);
        pcSlice->setExplicitScalingListUsed(true);
        int apsId = 0;
        picHeader->setScalingListAPSId( apsId );
      }

      // SAO parameter estimation using non-deblocked pixels for CTU bottom and right boundary areas
      if( pcSlice->getSPS()->getSAOEnabledFlag() && m_pcCfg->getSaoCtuBoundary() )
      {
        m_pcSAO->getPreDBFStatistics( cs );
      }

      //-- Loop filter
      if ( m_pcCfg->getDeblockingFilterMetric() )
      {
  #if W0038_DB_OPT
        if ( m_pcCfg->getDeblockingFilterMetric()==2 )
        {
          applyDeblockingFilterParameterSelection(pcPic, uiNumSliceSegments, iGOPid);
        }
        else
        {
  #endif
          applyDeblockingFilterMetric(pcPic, uiNumSliceSegments);
  #if W0038_DB_OPT
        }
  #endif
      }
#if JVET_R0110_MIXED_LOSSLESS
      if (m_pcCfg->getCostMode() == COST_LOSSLESS_CODING) 
      {
        for (int s = 0; s < uiNumSliceSegments; s++)
        {
          if (pcPic->slices[s]->isLossless())
          {
            pcPic->slices[s]->setDeblockingFilterDisable(true);
          }
        }
      }
#endif
      m_pcLoopFilter->loopFilterPic( cs );

      CS::setRefinedMotionField(cs);

      if( pcSlice->getSPS()->getSAOEnabledFlag() )
      {
        bool sliceEnabled[MAX_NUM_COMPONENT];
        m_pcSAO->initCABACEstimator( m_pcEncLib->getCABACEncoder(), m_pcEncLib->getCtxCache(), pcSlice );

        m_pcSAO->SAOProcess( cs, sliceEnabled, pcSlice->getLambdas(),
#if ENABLE_QPA
                             (m_pcCfg->getUsePerceptQPA() && !m_pcCfg->getUseRateCtrl() && pcSlice->getPPS()->getUseDQP() ? m_pcEncLib->getRdCost (PARL_PARAM0 (0))->getChromaWeight() : 0.0),
#endif
                             m_pcCfg->getTestSAODisableAtPictureLevel(), m_pcCfg->getSaoEncodingRate(), m_pcCfg->getSaoEncodingRateChroma(), m_pcCfg->getSaoCtuBoundary(), m_pcCfg->getSaoGreedyMergeEnc() );
        //assign SAO slice header
        for (int s = 0; s < uiNumSliceSegments; s++)
        {

#if  JVET_R0110_MIXED_LOSSLESS
          if (pcPic->slices[s]->isLossless() && m_pcCfg->getCostMode() == COST_LOSSLESS_CODING)
          {
            pcPic->slices[s]->setSaoEnabledFlag(CHANNEL_TYPE_LUMA, false);
            pcPic->slices[s]->setSaoEnabledFlag(CHANNEL_TYPE_CHROMA, false);
          }
          else
          {
#endif          
            pcPic->slices[s]->setSaoEnabledFlag(CHANNEL_TYPE_LUMA, sliceEnabled[COMPONENT_Y]);
            CHECK(!(sliceEnabled[COMPONENT_Cb] == sliceEnabled[COMPONENT_Cr]), "Unspecified error");
            pcPic->slices[s]->setSaoEnabledFlag(CHANNEL_TYPE_CHROMA, sliceEnabled[COMPONENT_Cb]);

#if  JVET_R0110_MIXED_LOSSLESS
        }
#endif

        }
      }

      if( pcSlice->getSPS()->getALFEnabledFlag() )
      {
        m_pcALF->destroy();
        m_pcALF->create( m_pcCfg, picWidth, picHeight, chromaFormatIDC, maxCUWidth, maxCUHeight, maxTotalCUDepth, m_pcCfg->getBitDepth(), m_pcCfg->getInputBitDepth() );

        for (int s = 0; s < uiNumSliceSegments; s++)
        {
          pcPic->slices[s]->setTileGroupAlfEnabledFlag(COMPONENT_Y, false);
        }
        m_pcALF->initCABACEstimator(m_pcEncLib->getCABACEncoder(), m_pcEncLib->getCtxCache(), pcSlice, m_pcEncLib->getApsMap());
        m_pcALF->ALFProcess(cs, pcSlice->getLambdas()
#if ENABLE_QPA
          , (m_pcCfg->getUsePerceptQPA() && !m_pcCfg->getUseRateCtrl() && pcSlice->getPPS()->getUseDQP() ? m_pcEncLib->getRdCost(PARL_PARAM0(0))->getChromaWeight() : 0.0)
#endif
#if JVET_R0110_MIXED_LOSSLESS
          , pcPic, uiNumSliceSegments
#endif
        );

        //assign ALF slice header
        for (int s = 0; s < uiNumSliceSegments; s++)
        {
#if JVET_R0110_MIXED_LOSSLESS
           //For the first slice, even if it is lossless, slice level ALF is not disabled and ALF-APS is signaled so that the later lossy slices can use APS of the first slice. 
           //However, if the first slice is lossless, the ALF process is disabled for all of the CTUs ( m_ctuEnableFlag == 0) of that slice which is implemented in the function void EncAdaptiveLoopFilter::ALFProcess.         
      
          if (pcPic->slices[s]->isLossless() && s && m_pcCfg->getCostMode() == COST_LOSSLESS_CODING)
          {
            pcPic->slices[s]->setTileGroupAlfEnabledFlag(COMPONENT_Y, false);
            pcPic->slices[s]->setTileGroupAlfEnabledFlag(COMPONENT_Cb, false);
            pcPic->slices[s]->setTileGroupAlfEnabledFlag(COMPONENT_Cr, false);
          }
          else
          {
#endif          
            pcPic->slices[s]->setTileGroupAlfEnabledFlag(COMPONENT_Y, cs.slice->getTileGroupAlfEnabledFlag(COMPONENT_Y));
            pcPic->slices[s]->setTileGroupAlfEnabledFlag(COMPONENT_Cb, cs.slice->getTileGroupAlfEnabledFlag(COMPONENT_Cb));
            pcPic->slices[s]->setTileGroupAlfEnabledFlag(COMPONENT_Cr, cs.slice->getTileGroupAlfEnabledFlag(COMPONENT_Cr));

#if JVET_R0110_MIXED_LOSSLESS
          }
#endif
          if (pcPic->slices[s]->getTileGroupAlfEnabledFlag(COMPONENT_Y))
          {
            pcPic->slices[s]->setTileGroupNumAps(cs.slice->getTileGroupNumAps());
            pcPic->slices[s]->setAlfAPSs(cs.slice->getTileGroupApsIdLuma());
          }
          else
          {
            pcPic->slices[s]->setTileGroupNumAps(0);
          }
          pcPic->slices[s]->setAlfAPSs(cs.slice->getAlfAPSs());
          pcPic->slices[s]->setTileGroupApsIdChroma(cs.slice->getTileGroupApsIdChroma());
          pcPic->slices[s]->setTileGroupCcAlfCbApsId(cs.slice->getTileGroupCcAlfCbApsId());
          pcPic->slices[s]->setTileGroupCcAlfCrApsId(cs.slice->getTileGroupCcAlfCrApsId());
        }
      }
      DTRACE_UPDATE( g_trace_ctx, ( std::make_pair( "final", 1 ) ) );
      if (m_pcCfg->getUseCompositeRef() && getPrepareLTRef())
      {
        updateCompositeReference(pcSlice, rcListPic, pocCurr);
      }
    }
    else // skip enc picture
    {
      pcSlice->setSliceQpBase( pcSlice->getSliceQp() );

#if ENABLE_QPA
      if (m_pcCfg->getUsePerceptQPA() && !m_pcCfg->getUseRateCtrl() && pcSlice->getPPS()->getUseDQP())
      {
        const double picLambda = pcSlice->getLambdas()[0];

        for (uint32_t ctuRsAddr = 0; ctuRsAddr < numberOfCtusInFrame; ctuRsAddr++)
        {
          pcPic->m_uEnerHpCtu[ctuRsAddr] = picLambda;  // initialize to slice lambda (just for safety)
        }
      }
#endif
      if( pcSlice->getSPS()->getSAOEnabledFlag() )
      {
        m_pcSAO->disabledRate( *pcPic->cs, pcPic->getSAO(1), m_pcCfg->getSaoEncodingRate(), m_pcCfg->getSaoEncodingRateChroma());
      }
    }

    pcSlice->freeScaledRefPicList( scaledRefPic );

    if( m_pcCfg->getUseAMaxBT() )
    {
      for( const CodingUnit *cu : pcPic->cs->cus )
      {
        if( !pcSlice->isIRAP() )
        {
          m_uiBlkSize[pcSlice->getDepth()] += cu->Y().area();
          m_uiNumBlk [pcSlice->getDepth()]++;
        }
      }
    }

    if( encPic || decPic )
    {
      pcSlice = pcPic->slices[0];

      /////////////////////////////////////////////////////////////////////////////////////////////////// File writing

      // write various parameter sets
      bool writePS = m_bSeqFirst || (m_pcCfg->getReWriteParamSets() && (pcSlice->isIRAP()));
      if (writePS)
      {
        m_pcEncLib->setParamSetChanged(pcSlice->getSPS()->getSPSId(), pcSlice->getPPS()->getPPSId());
      }

      int layerIdx = m_pcEncLib->getVPS() == nullptr ? 0 : m_pcEncLib->getVPS()->getGeneralLayerIdx( m_pcEncLib->getLayerId() );

      // it is assumed that layerIdx equal to 0 is always present
      actualTotalBits += xWriteParameterSets(accessUnit, pcSlice, writePS, layerIdx);
      if (writePS)
      {
        // create prefix SEI messages at the beginning of the sequence
        CHECK(!(leadingSeiMessages.empty()), "Unspecified error");
        xCreateIRAPLeadingSEIMessages(leadingSeiMessages, pcSlice->getSPS(), pcSlice->getPPS());

        m_bSeqFirst = false;
      }

      // it is assumed that layerIdx equal to 0 is always present
      if( m_pcCfg->getAccessUnitDelimiter() && !layerIdx )
      {
        xWriteAccessUnitDelimiter(accessUnit, pcSlice);
      }

      //send LMCS APS when LMCSModel is updated. It can be updated even current slice does not enable reshaper.
      //For example, in RA, update is on intra slice, but intra slice may not use reshaper
      if (pcSlice->getSPS()->getUseLmcs())