IntraSearch.cpp

  delete[] pelListSort;
}
#endif
// -------------------------------------------------------------------------------------------------------------------
// Intra search
// -------------------------------------------------------------------------------------------------------------------

void IntraSearch::xEncIntraHeader( CodingStructure &cs, Partitioner &partitioner, const bool &bLuma, const bool &bChroma, const int subTuIdx )
{
  CodingUnit &cu = *cs.getCU( partitioner.chType );

  if (bLuma)
  {
    bool isFirst = cu.ispMode ? subTuIdx == 0 : partitioner.currArea().lumaPos() == cs.area.lumaPos();

    // CU header
    if( isFirst )
    {
#if JVET_O0119_BASE_PALETTE_444
    if ((!cs.slice->isIntra() || cs.slice->getSPS()->getIBCFlag() || cs.slice->getSPS()->getPLTMode())
    && cu.Y().valid()
    )
#else
      if ((!cs.slice->isIntra() || cs.slice->getSPS()->getIBCFlag())
        && cu.Y().valid()
        )
#endif
      {
        if( cs.pps->getTransquantBypassEnabledFlag() )
        {
          m_CABACEstimator->cu_transquant_bypass_flag( cu );
        }
        m_CABACEstimator->cu_skip_flag( cu );
        m_CABACEstimator->pred_mode   ( cu );
      }
#if JVET_O0119_BASE_PALETTE_444
    if (CU::isPLT(cu))
    {
      return;
    }
#endif
      m_CABACEstimator->bdpcm_mode  ( cu, ComponentID(partitioner.chType) );
      if( CU::isIntra(cu) )
      {
        m_CABACEstimator->pcm_data( cu, partitioner );
        if( cu.ipcm )
        {
          return;
        }
      }
    }

    PredictionUnit &pu = *cs.getPU(partitioner.currArea().lumaPos(), partitioner.chType);

    // luma prediction mode
    if (isFirst)
    {
      if ( !cu.Y().valid())
        m_CABACEstimator->pred_mode( cu );
      m_CABACEstimator->intra_luma_pred_mode( pu );
    }
  }

  if (bChroma)
  {
    bool isFirst = partitioner.currArea().Cb().valid() && partitioner.currArea().chromaPos() == cs.area.chromaPos();

    PredictionUnit &pu = *cs.getPU( partitioner.currArea().chromaPos(), CHANNEL_TYPE_CHROMA );

    if( isFirst )
    {
      m_CABACEstimator->intra_chroma_pred_mode( pu );
    }
  }
}

void IntraSearch::xEncSubdivCbfQT( CodingStructure &cs, Partitioner &partitioner, const bool &bLuma, const bool &bChroma, const int subTuIdx, const PartSplit ispType )
{
  const UnitArea &currArea = partitioner.currArea();
          int subTuCounter = subTuIdx;
  TransformUnit &currTU = *cs.getTU( currArea.blocks[partitioner.chType], partitioner.chType, subTuCounter );
  CodingUnit    &currCU = *currTU.cu;
  uint32_t currDepth           = partitioner.currTrDepth;

  const bool subdiv        = currTU.depth > currDepth;
  ComponentID compID = partitioner.chType == CHANNEL_TYPE_LUMA ? COMPONENT_Y : COMPONENT_Cb;
  const bool chromaCbfISP = currArea.blocks[COMPONENT_Cb].valid() && currCU.ispMode && !subdiv;

  if( partitioner.canSplit( TU_MAX_TR_SPLIT, cs ) )
  {
    CHECK( !subdiv, "TU split implied" );
  }
  else
  {
    CHECK( subdiv && !currCU.ispMode && isLuma( compID ), "No TU subdivision is allowed with QTBT" );
  }

  if( bChroma && ( !currCU.ispMode || chromaCbfISP ) )
  {
    const uint32_t numberValidComponents = getNumberValidComponents(currArea.chromaFormat);
    const uint32_t cbfDepth = ( chromaCbfISP ? currDepth - 1 : currDepth );

    for (uint32_t ch = COMPONENT_Cb; ch < numberValidComponents; ch++)
    {
      const ComponentID compID = ComponentID(ch);

      if( currDepth == 0 || TU::getCbfAtDepth( currTU, compID, currDepth - 1 ) || chromaCbfISP )
      {
        const bool prevCbf = ( compID == COMPONENT_Cr ? TU::getCbfAtDepth( currTU, COMPONENT_Cb, currDepth ) : false );
        m_CABACEstimator->cbf_comp( cs, TU::getCbfAtDepth( currTU, compID, currDepth ), currArea.blocks[compID], cbfDepth, prevCbf );

      }
    }
  }

  if (subdiv)
  {

    if( partitioner.canSplit( TU_MAX_TR_SPLIT, cs ) )
    {
      partitioner.splitCurrArea( TU_MAX_TR_SPLIT, cs );
    }
    else if( currCU.ispMode && isLuma( compID ) )
    {
      partitioner.splitCurrArea( ispType, cs );
    }
    else
    THROW( "Cannot perform an implicit split!" );

    do
    {
      xEncSubdivCbfQT( cs, partitioner, bLuma, bChroma, subTuCounter, ispType );
      subTuCounter += subTuCounter != -1 ? 1 : 0;
    } while( partitioner.nextPart( cs ) );

    partitioner.exitCurrSplit();
  }
  else
  {
    //===== Cbfs =====
    if (bLuma)
    {
      bool previousCbf       = false;
      bool lastCbfIsInferred = false;
      if( ispType != TU_NO_ISP )
      {
        bool rootCbfSoFar = false;
        uint32_t nTus = currCU.ispMode == HOR_INTRA_SUBPARTITIONS ? currCU.lheight() >> g_aucLog2[currTU.lheight()] : currCU.lwidth() >> g_aucLog2[currTU.lwidth()];
        if( subTuCounter == nTus - 1 )
        {
          TransformUnit* tuPointer = currCU.firstTU;
          for( int tuIdx = 0; tuIdx < nTus - 1; tuIdx++ )
          {
            rootCbfSoFar |= TU::getCbfAtDepth( *tuPointer, COMPONENT_Y, currDepth );
            tuPointer = tuPointer->next;
          }
          if( !rootCbfSoFar )
          {
            lastCbfIsInferred = true;
          }
        }
        if( !lastCbfIsInferred )
        {
          previousCbf = TU::getPrevTuCbfAtDepth( currTU, COMPONENT_Y, partitioner.currTrDepth );
        }
      }
      if( !lastCbfIsInferred )
      {
        m_CABACEstimator->cbf_comp( cs, TU::getCbfAtDepth( currTU, COMPONENT_Y, currDepth ), currTU.Y(), currTU.depth, previousCbf, currCU.ispMode );
      }
    }
  }
}

void IntraSearch::xEncCoeffQT( CodingStructure &cs, Partitioner &partitioner, const ComponentID compID, const int subTuIdx, const PartSplit ispType )
{
  const UnitArea &currArea  = partitioner.currArea();

       int subTuCounter     = subTuIdx;
  TransformUnit &currTU     = *cs.getTU( currArea.blocks[partitioner.chType], partitioner.chType, subTuIdx );
  uint32_t      currDepth       = partitioner.currTrDepth;
  const bool subdiv         = currTU.depth > currDepth;

  if (subdiv)
  {
    if (partitioner.canSplit(TU_MAX_TR_SPLIT, cs))
    {
      partitioner.splitCurrArea(TU_MAX_TR_SPLIT, cs);
    }
    else if( currTU.cu->ispMode )
    {
      partitioner.splitCurrArea( ispType, cs );
    }
    else
      THROW("Implicit TU split not available!");

    do
    {
      xEncCoeffQT( cs, partitioner, compID, subTuCounter, ispType );
      subTuCounter += subTuCounter != -1 ? 1 : 0;
    } while( partitioner.nextPart( cs ) );

    partitioner.exitCurrSplit();
  }
  else

  if( currArea.blocks[compID].valid() )
  {
#if JVET_O0105_ICT
    if( compID == COMPONENT_Cr )
    {
      const int cbfMask = ( TU::getCbf( currTU, COMPONENT_Cb ) ? 2 : 0 ) + ( TU::getCbf( currTU, COMPONENT_Cr ) ? 1 : 0 );
      m_CABACEstimator->joint_cb_cr( currTU, cbfMask );
    }
#endif
    if( TU::hasCrossCompPredInfo( currTU, compID ) )
    {
      m_CABACEstimator->cross_comp_pred( currTU, compID );
    }
    if( TU::getCbf( currTU, compID ) )
    {
      m_CABACEstimator->residual_coding( currTU, compID );
    }
  }
}

uint64_t IntraSearch::xGetIntraFracBitsQT( CodingStructure &cs, Partitioner &partitioner, const bool &bLuma, const bool &bChroma, const int subTuIdx, const PartSplit ispType )
{
  m_CABACEstimator->resetBits();

  xEncIntraHeader( cs, partitioner, bLuma, bChroma, subTuIdx );
  xEncSubdivCbfQT( cs, partitioner, bLuma, bChroma, subTuIdx, ispType );


  if( bLuma )
  {
    xEncCoeffQT( cs, partitioner, COMPONENT_Y, subTuIdx, ispType );
  }
  if( bChroma )
  {
    xEncCoeffQT( cs, partitioner, COMPONENT_Cb, subTuIdx, ispType );
    xEncCoeffQT( cs, partitioner, COMPONENT_Cr, subTuIdx, ispType );
  }

  uint64_t fracBits = m_CABACEstimator->getEstFracBits();
  return fracBits;
}

uint64_t IntraSearch::xGetIntraFracBitsQTSingleChromaComponent( CodingStructure &cs, Partitioner &partitioner, const ComponentID compID )
{
  m_CABACEstimator->resetBits();

  if( compID == COMPONENT_Cb )
  {
    //intra mode coding
    PredictionUnit &pu = *cs.getPU( partitioner.currArea().lumaPos(), partitioner.chType );
    m_CABACEstimator->intra_chroma_pred_mode( pu );
    //xEncIntraHeader(cs, partitioner, false, true);
  }
  CHECK( partitioner.currTrDepth != 1, "error in the depth!" );
  const UnitArea &currArea = partitioner.currArea();

  TransformUnit &currTU = *cs.getTU( currArea.blocks[partitioner.chType], partitioner.chType );

  //cbf coding
#if JVET_O0105_ICT
  const bool prevCbf = ( compID == COMPONENT_Cr ? TU::getCbfAtDepth( currTU, COMPONENT_Cb, partitioner.currTrDepth ) : false );
  m_CABACEstimator->cbf_comp( cs, TU::getCbfAtDepth( currTU, compID, partitioner.currTrDepth ), currArea.blocks[compID], partitioner.currTrDepth - 1, prevCbf );
#else
  m_CABACEstimator->cbf_comp( cs, TU::getCbfAtDepth( currTU, compID, partitioner.currTrDepth ), currArea.blocks[compID], partitioner.currTrDepth - 1 );
#endif
  //coeffs coding and cross comp coding
  if( TU::hasCrossCompPredInfo( currTU, compID ) )
  {
    m_CABACEstimator->cross_comp_pred( currTU, compID );
  }
  if( TU::getCbf( currTU, compID ) )
  {
    m_CABACEstimator->residual_coding( currTU, compID );
  }

  uint64_t fracBits = m_CABACEstimator->getEstFracBits();
  return fracBits;
}

uint64_t IntraSearch::xGetIntraFracBitsQTChroma(TransformUnit& currTU, const ComponentID &compID)
{
  m_CABACEstimator->resetBits();

  if( TU::hasCrossCompPredInfo( currTU, compID ) )
  {
    m_CABACEstimator->cross_comp_pred( currTU, compID );
  }

  // Include Cbf and jointCbCr flags here as we make decisions across components
  CodingStructure &cs = *currTU.cs;

  if ( currTU.jointCbCr )
  {
#if JVET_O0105_ICT
    const int cbfMask = ( TU::getCbf( currTU, COMPONENT_Cb ) ? 2 : 0 ) + ( TU::getCbf( currTU, COMPONENT_Cr ) ? 1 : 0 );
    m_CABACEstimator->cbf_comp( cs, cbfMask>>1, currTU.blocks[ COMPONENT_Cb ], currTU.depth, false );
    m_CABACEstimator->cbf_comp( cs, cbfMask &1, currTU.blocks[ COMPONENT_Cr ], currTU.depth, cbfMask>>1 );
    if( cbfMask )
      m_CABACEstimator->joint_cb_cr( currTU, cbfMask );
    if( cbfMask >> 1 )
      m_CABACEstimator->residual_coding( currTU, COMPONENT_Cb );
    if( cbfMask & 1 )
      m_CABACEstimator->residual_coding( currTU, COMPONENT_Cr );
#else
    if ( TU::getCbf( currTU, COMPONENT_Cb ) )
    {
      m_CABACEstimator->cbf_comp( cs, true, currTU.blocks[ COMPONENT_Cb ], currTU.depth, false );
      m_CABACEstimator->cbf_comp( cs, true, currTU.blocks[ COMPONENT_Cr ], currTU.depth, true );
      m_CABACEstimator->joint_cb_cr( currTU );
    }
    else
    {
      m_CABACEstimator->cbf_comp( cs, false, currTU.blocks[ COMPONENT_Cb ], currTU.depth, false );
      m_CABACEstimator->cbf_comp( cs, false, currTU.blocks[ COMPONENT_Cr ], currTU.depth, false );
    }
#endif
  }
  else
  {
    if ( compID == COMPONENT_Cb )
      m_CABACEstimator->cbf_comp( cs, TU::getCbf( currTU, compID ), currTU.blocks[ compID ], currTU.depth, false );
    else
#if JVET_O0105_ICT
    {
      const bool cbCbf    = TU::getCbf( currTU, COMPONENT_Cb );
      const bool crCbf    = TU::getCbf( currTU, compID );
      const int  cbfMask  = ( cbCbf ? 2 : 0 ) + ( crCbf ? 1 : 0 );
      m_CABACEstimator->cbf_comp( cs, crCbf, currTU.blocks[ compID ], currTU.depth, cbCbf );
      m_CABACEstimator->joint_cb_cr( currTU, cbfMask );
    }
#else
      m_CABACEstimator->cbf_comp( cs, TU::getCbf( currTU, compID ), currTU.blocks[ compID ], currTU.depth, TU::getCbf( currTU, COMPONENT_Cb ) );
#endif
  }

#if JVET_O0105_ICT
  if( !currTU.jointCbCr && TU::getCbf( currTU, compID ) )
#else
  if( TU::getCbf( currTU, compID ) )
#endif
  {
    m_CABACEstimator->residual_coding( currTU, compID );
  }

  uint64_t fracBits = m_CABACEstimator->getEstFracBits();
  return fracBits;
}

void IntraSearch::xIntraCodingTUBlock(TransformUnit &tu, const ComponentID &compID, const bool &checkCrossCPrediction, Distortion& ruiDist, const int &default0Save1Load2, uint32_t* numSig, std::vector<TrMode>* trModes, const bool loadTr)
{
  if (!tu.blocks[compID].valid())
  {
    return;
  }

  CodingStructure &cs                       = *tu.cs;
  m_pcRdCost->setChromaFormat(cs.sps->getChromaFormatIdc());

  const CompArea      &area                 = tu.blocks[compID];
  const SPS           &sps                  = *cs.sps;
  const PPS           &pps                  = *cs.pps;

  const ChannelType    chType               = toChannelType(compID);
  const int            bitDepth             = sps.getBitDepth(chType);

  PelBuf         piOrg                      = cs.getOrgBuf    (area);
  PelBuf         piPred                     = cs.getPredBuf   (area);
  PelBuf         piResi                     = cs.getResiBuf   (area);
  PelBuf         piOrgResi                  = cs.getOrgResiBuf(area);
  PelBuf         piReco                     = cs.getRecoBuf   (area);

  const PredictionUnit &pu                  = *cs.getPU(area.pos(), chType);
  const uint32_t           uiChFinalMode        = PU::getFinalIntraMode(pu, chType);

  const bool           bUseCrossCPrediction = pps.getPpsRangeExtension().getCrossComponentPredictionEnabledFlag() && isChroma( compID ) && PU::isChromaIntraModeCrossCheckMode( pu ) && checkCrossCPrediction;
  const bool           ccUseRecoResi        = m_pcEncCfg->getUseReconBasedCrossCPredictionEstimate();
  const bool           ispSplitIsAllowed    = sps.getUseISP() && CU::canUseISP( *tu.cu, compID );


  //===== init availability pattern =====
#if JVET_O0105_ICT
  CHECK( tu.jointCbCr && compID == COMPONENT_Cr, "wrong combination of compID and jointCbCr" );
#endif
  bool jointCbCr = tu.jointCbCr && compID == COMPONENT_Cb;

  if ( compID == COMPONENT_Y )
  {
  PelBuf sharedPredTS( m_pSharedPredTransformSkip[compID], area );
  if( default0Save1Load2 != 2 )
  {
#if JVET_O0106_ISP_4xN_PREDREG_FOR_1xN_2xN
    bool predRegDiffFromTB = CU::isPredRegDiffFromTB(*tu.cu, compID);
    bool firstTBInPredReg = CU::isFirstTBInPredReg(*tu.cu, compID, area);
    CompArea areaPredReg(COMPONENT_Y, tu.chromaFormat, area);
    if (predRegDiffFromTB)
    {
      if (firstTBInPredReg)
      {
        CU::adjustPredArea(areaPredReg);
        initIntraPatternChType(*tu.cu, areaPredReg);
      }
    }
    else
#endif
      initIntraPatternChType(*tu.cu, area);

    //===== get prediction signal =====
    if( compID != COMPONENT_Y && PU::isLMCMode( uiChFinalMode ) )
    {
      {
        xGetLumaRecPixels( pu, area );
      }
      predIntraChromaLM( compID, piPred, pu, area, uiChFinalMode );
    }
    else
    {
      if( PU::isMIP( pu, chType ) )
      {
        predIntraMip( compID, piPred, pu );
      }
      else
      {
#if JVET_O0106_ISP_4xN_PREDREG_FOR_1xN_2xN
        if (predRegDiffFromTB)
        {
          if (firstTBInPredReg)
          {
            PelBuf piPredReg = cs.getPredBuf(areaPredReg);
            predIntraAng(compID, piPredReg, pu);
          }
        }
        else
#endif
          predIntraAng(compID, piPred, pu);
      }
    }


    // save prediction
    if( default0Save1Load2 == 1 )
    {
      sharedPredTS.copyFrom( piPred );
    }
  }
  else
  {
    // load prediction
    piPred.copyFrom( sharedPredTS );
  }
  }


  DTRACE( g_trace_ctx, D_PRED, "@(%4d,%4d) [%2dx%2d] IMode=%d\n", tu.lx(), tu.ly(), tu.lwidth(), tu.lheight(), uiChFinalMode );
  //DTRACE_PEL_BUF( D_PRED, piPred, tu, tu.cu->predMode, COMPONENT_Y );

  const Slice           &slice = *cs.slice;
  bool flag = slice.getLmcsEnabledFlag() && (slice.isIntra() || (!slice.isIntra() && m_pcReshape->getCTUFlag()));
#if JVET_O0105_ICT
  if (isLuma(compID))
  {
#endif
  if (flag && slice.getLmcsChromaResidualScaleFlag() && isChroma(compID))
  {
    const Area area = tu.Y().valid() ? tu.Y() : Area(recalcPosition(tu.chromaFormat, tu.chType, CHANNEL_TYPE_LUMA, tu.blocks[tu.chType].pos()), recalcSize(tu.chromaFormat, tu.chType, CHANNEL_TYPE_LUMA, tu.blocks[tu.chType].size()));
    const CompArea &areaY = CompArea(COMPONENT_Y, tu.chromaFormat, area );
#if JVET_O1109_UNFIY_CRS
    int adj = m_pcReshape->calculateChromaAdjVpduNei(tu, areaY);
#else
    PelBuf piPredY;
    piPredY = cs.picture->getPredBuf(areaY);
    const Pel avgLuma = piPredY.computeAvg();
    int adj = m_pcReshape->calculateChromaAdj(avgLuma);
#endif
    tu.setChromaAdj(adj);
  }
  //===== get residual signal =====
  piResi.copyFrom( piOrg  );
  if (slice.getLmcsEnabledFlag() && m_pcReshape->getCTUFlag() && compID == COMPONENT_Y)
  {
    CompArea      tmpArea(COMPONENT_Y, area.chromaFormat, Position(0, 0), area.size());
    PelBuf tmpPred = m_tmpStorageLCU.getBuf(tmpArea);
    tmpPred.copyFrom(piPred);
    piResi.rspSignal(m_pcReshape->getFwdLUT());
    piResi.subtract(tmpPred);
  }
  else
  piResi.subtract( piPred );

  if (pps.getPpsRangeExtension().getCrossComponentPredictionEnabledFlag() && isLuma(compID))
  {
    piOrgResi.copyFrom (piResi);
  }

  if (bUseCrossCPrediction)
  {
    if (xCalcCrossComponentPredictionAlpha(tu, compID, ccUseRecoResi) == 0)
    {
      return;
    }
    CrossComponentPrediction::crossComponentPrediction(tu, compID, cs.getResiBuf(tu.Y()), piResi, piResi, false);
  }
#if JVET_O0105_ICT
  }
#endif

  //===== transform and quantization =====
  //--- init rate estimation arrays for RDOQ ---
  //--- transform and quantization           ---
  TCoeff uiAbsSum = 0;

  const QpParam cQP(tu, compID);

#if RDOQ_CHROMA_LAMBDA
  m_pcTrQuant->selectLambda(compID);
#endif

  flag =flag && (tu.blocks[compID].width*tu.blocks[compID].height > 4);
  if (flag && isChroma(compID) && slice.getLmcsChromaResidualScaleFlag() )
  {
    int cResScaleInv = tu.getChromaAdj();
#if JVET_O0429_CRS_LAMBDA_FIX
    double cResScale = (double)(1 << CSCALE_FP_PREC) / (double)cResScaleInv;
#else
    double cResScale = round((double)(1 << CSCALE_FP_PREC) / (double)cResScaleInv);
#endif
    m_pcTrQuant->setLambda(m_pcTrQuant->getLambda() / (cResScale*cResScale));
#if !JVET_O0105_ICT
    if ( !jointCbCr ) // Joint CbCr signal is to be scaled in the case of joint chroma
    piResi.scaleSignal(cResScaleInv, 1, tu.cu->cs->slice->clpRng(compID));
#endif
  }

  const CompArea &crArea = tu.blocks     [ COMPONENT_Cr ];
  PelBuf          crOrg  = cs.getOrgBuf  ( crArea );
  PelBuf          crPred = cs.getPredBuf ( crArea );
  PelBuf          crResi = cs.getResiBuf ( crArea );
  PelBuf          crReco = cs.getRecoBuf ( crArea );

  if ( jointCbCr )
  {
#if !JVET_O0105_ICT
    // Get Cr prediction and residual
    crResi.copyFrom( crOrg  );
    crResi.subtract( crPred );

    // Create joint residual and store it for Cb component: jointResi = (cbResi - crResi)/2
    piResi.subtractAndHalve( crResi );

    // Scale the joint signal
    if ( flag && slice.getLmcsChromaResidualScaleFlag() )
      piResi.scaleSignal(tu.getChromaAdj(), 1, tu.cu->cs->slice->clpRng(compID));
#endif
    // Lambda is loosened for the joint mode with respect to single modes as the same residual is used for both chroma blocks
#if JVET_O0105_ICT
    const int    absIct = abs( TU::getICTMode(tu) );
    const double lfact  = ( absIct == 1 || absIct == 3 ? 0.8 : 0.5 );
    m_pcTrQuant->setLambda( lfact * m_pcTrQuant->getLambda() );
#else
    m_pcTrQuant->setLambda( 0.60 * m_pcTrQuant->getLambda() );
#endif
  }
#if JVET_O0105_ICT
  if( isChroma(compID) && tu.cu->cs->slice->getSliceQp() > 18 )
  {
    m_pcTrQuant->setLambda( 1.3 * m_pcTrQuant->getLambda() );
  }
#else
  else if ( isChroma(compID) && tu.cu->cs->slice->getSliceQp() > 18 )
    m_pcTrQuant->setLambda( 1.10 * m_pcTrQuant->getLambda() );
#endif

#if JVET_O0105_ICT
  if( isLuma(compID) )
  {
#endif
  double diagRatio = 0, horVerRatio = 0;

  if( trModes )
  {
    m_pcTrQuant->transformNxN( tu, compID, cQP, trModes, CU::isIntra( *tu.cu ) ? m_pcEncCfg->getIntraMTSMaxCand() : m_pcEncCfg->getInterMTSMaxCand(), ispSplitIsAllowed ? &diagRatio : nullptr, ispSplitIsAllowed ? &horVerRatio : nullptr );
    tu.mtsIdx = trModes->at(0).first;
  }
  m_pcTrQuant->transformNxN( tu, compID, cQP, uiAbsSum, m_CABACEstimator->getCtx(), loadTr, &diagRatio, &horVerRatio );
    if ( !tu.cu->ispMode && isLuma(compID) && ispSplitIsAllowed && tu.mtsIdx == MTS_DCT2_DCT2 && ispSplitIsAllowed )
  {
    m_intraModeDiagRatio        .push_back(diagRatio);
    m_intraModeHorVerRatio      .push_back(horVerRatio);
    m_intraModeTestedNormalIntra.push_back((int)uiChFinalMode);
  }


  DTRACE( g_trace_ctx, D_TU_ABS_SUM, "%d: comp=%d, abssum=%d\n", DTRACE_GET_COUNTER( g_trace_ctx, D_TU_ABS_SUM ), compID, uiAbsSum );


  //--- inverse transform ---
  if (uiAbsSum > 0)
  {
    m_pcTrQuant->invTransformNxN(tu, compID, piResi, cQP);
  }
  else
  {
    piResi.fill(0);
  }
#if JVET_O0105_ICT
  }
  else // chroma
  {
    int         codedCbfMask  = 0;
    ComponentID codeCompId    = ( tu.jointCbCr ? ( tu.jointCbCr>>1 ? COMPONENT_Cb : COMPONENT_Cr ) : compID );
    if( tu.jointCbCr )
    {
      ComponentID otherCompId = ( codeCompId==COMPONENT_Cr ? COMPONENT_Cb : COMPONENT_Cr );
      tu.getCoeffs( otherCompId ).fill(0); // do we need that?
      TU::setCbfAtDepth (tu, otherCompId, tu.depth, false );
    }
    PelBuf& codeResi = ( codeCompId == COMPONENT_Cr ? crResi : piResi );
    uiAbsSum = 0;
    m_pcTrQuant->transformNxN( tu, codeCompId, cQP, uiAbsSum, m_CABACEstimator->getCtx() );
    DTRACE( g_trace_ctx, D_TU_ABS_SUM, "%d: comp=%d, abssum=%d\n", DTRACE_GET_COUNTER( g_trace_ctx, D_TU_ABS_SUM ), codeCompId, uiAbsSum );
    if( uiAbsSum > 0 )
    {
      m_pcTrQuant->invTransformNxN(tu, codeCompId, codeResi, cQP);
      codedCbfMask += ( codeCompId == COMPONENT_Cb ? 2 : 1 );
    }
    else
    {
      codeResi.fill(0);
    }

    if( tu.jointCbCr )
    {
      if( tu.jointCbCr == 3 && codedCbfMask == 2 )
      {
        codedCbfMask = 3;
        TU::setCbfAtDepth (tu, COMPONENT_Cr, tu.depth, true );
      }
      if( tu.jointCbCr != codedCbfMask )
      {
        ruiDist = std::numeric_limits<Distortion>::max();
        return;
      }
      m_pcTrQuant->invTransformICT( tu, piResi, crResi );
      uiAbsSum = codedCbfMask;
    }
  }
#endif

  //===== reconstruction =====
  if ( flag && uiAbsSum > 0 && isChroma(compID) && slice.getLmcsChromaResidualScaleFlag() )
  {
    piResi.scaleSignal(tu.getChromaAdj(), 0, tu.cu->cs->slice->clpRng(compID));
#if JVET_O0105_ICT
    if( jointCbCr )
    {
      crResi.scaleSignal(tu.getChromaAdj(), 0, tu.cu->cs->slice->clpRng(COMPONENT_Cr));
    }
#endif
  }
  if (bUseCrossCPrediction)
  {
    CrossComponentPrediction::crossComponentPrediction(tu, compID, cs.getResiBuf(tu.Y()), piResi, piResi, true);
#if JVET_O0105_ICT
    if( jointCbCr )
    {
      CrossComponentPrediction::crossComponentPrediction(tu, COMPONENT_Cr, cs.getResiBuf(tu.Y()), crResi, crResi, true);
    }
#endif
  }

  if (slice.getLmcsEnabledFlag() && m_pcReshape->getCTUFlag() && compID == COMPONENT_Y)
  {
    CompArea      tmpArea(COMPONENT_Y, area.chromaFormat, Position(0,0), area.size());
    PelBuf tmpPred = m_tmpStorageLCU.getBuf(tmpArea);
    tmpPred.copyFrom(piPred);
    piReco.reconstruct(tmpPred, piResi, cs.slice->clpRng(compID));
  }
  else
#if JVET_O0105_ICT
  {
    piReco.reconstruct(piPred, piResi, cs.slice->clpRng( compID ));
    if( jointCbCr )
    {
      crReco.reconstruct(crPred, crResi, cs.slice->clpRng( COMPONENT_Cr ));
    }
  }
#else
  piReco.reconstruct(piPred, piResi, cs.slice->clpRng( compID ));
#endif

#if !JVET_O0105_ICT
  if ( jointCbCr )
  {
    // Cr uses negative of the signalled Cb residual
    if (uiAbsSum > 0)
      crResi.copyAndNegate( piResi );
    else
      crResi.fill(0);

    tu.getCoeffs(COMPONENT_Cr).fill(0);

    // Set cbf also for Cr
    TU::setCbfAtDepth (tu, COMPONENT_Cr, tu.depth, uiAbsSum > 0 ? true : false);

    // Cr reconstruction and its contribution to the total error
    crReco.reconstruct(crPred, crResi, cs.slice->clpRng( COMPONENT_Cr ));

#if WCG_EXT
    if ( m_pcEncCfg->getLumaLevelToDeltaQPMapping().isEnabled() ||
        (m_pcEncCfg->getReshaper()
          && slice.getLmcsEnabledFlag()
         && (m_pcReshape->getCTUFlag() || (isChroma(compID) && m_pcEncCfg->getReshapeIntraCMD()))))
    {
      const CPelBuf orgLuma = cs.getOrgBuf( cs.area.blocks[COMPONENT_Y] );
      ruiDist += m_pcRdCost->getDistPart( crOrg, crReco, bitDepth, COMPONENT_Cr, DF_SSE_WTD, &orgLuma );
    }
    else
#endif
    {
      ruiDist += m_pcRdCost->getDistPart( crOrg, crReco, bitDepth, COMPONENT_Cr, DF_SSE );
    }
  }
#endif

  //===== update distortion =====
#if WCG_EXT
  if (m_pcEncCfg->getLumaLevelToDeltaQPMapping().isEnabled() || (m_pcEncCfg->getReshaper()
    && slice.getLmcsEnabledFlag() && (m_pcReshape->getCTUFlag() || (isChroma(compID) && m_pcEncCfg->getReshapeIntraCMD()))))
  {
    const CPelBuf orgLuma = cs.getOrgBuf( cs.area.blocks[COMPONENT_Y] );
    if (compID == COMPONENT_Y  && !(m_pcEncCfg->getLumaLevelToDeltaQPMapping().isEnabled()))
    {
      CompArea      tmpArea1(COMPONENT_Y, area.chromaFormat, Position(0, 0), area.size());
      PelBuf tmpRecLuma = m_tmpStorageLCU.getBuf(tmpArea1);
      tmpRecLuma.copyFrom(piReco);
      tmpRecLuma.rspSignal(m_pcReshape->getInvLUT());
      ruiDist += m_pcRdCost->getDistPart(piOrg, tmpRecLuma, sps.getBitDepth(toChannelType(compID)), compID, DF_SSE_WTD, &orgLuma);
    }
    else
#if JVET_O0105_ICT
    {
      ruiDist += m_pcRdCost->getDistPart(piOrg, piReco, bitDepth, compID, DF_SSE_WTD, &orgLuma);
      if( jointCbCr )
      {
        ruiDist += m_pcRdCost->getDistPart(crOrg, crReco, bitDepth, COMPONENT_Cr, DF_SSE_WTD, &orgLuma);
      }
    }
#else
      ruiDist += m_pcRdCost->getDistPart(piOrg, piReco, bitDepth, compID, DF_SSE_WTD, &orgLuma);
#endif
  }
  else
#endif
  {
    ruiDist += m_pcRdCost->getDistPart( piOrg, piReco, bitDepth, compID, DF_SSE );
#if JVET_O0105_ICT
    if( jointCbCr )
    {
      ruiDist += m_pcRdCost->getDistPart( crOrg, crReco, bitDepth, COMPONENT_Cr, DF_SSE );
    }
#endif
  }
}

bool IntraSearch::xRecurIntraCodingLumaQT( CodingStructure &cs, Partitioner &partitioner, const double bestCostSoFar, const int subTuIdx, const PartSplit ispType, const bool ispIsCurrentWinner, bool mtsCheckRangeFlag, int mtsFirstCheckId, int mtsLastCheckId, bool moreProbMTSIdxFirst )
{
        int   subTuCounter = subTuIdx;
  const UnitArea &currArea = partitioner.currArea();
  const CodingUnit     &cu = *cs.getCU( currArea.lumaPos(), partitioner.chType );
        bool  earlySkipISP = false;
  uint32_t currDepth       = partitioner.currTrDepth;
  const SPS &sps           = *cs.sps;
  const PPS &pps           = *cs.pps;
  const bool keepResi      = pps.getPpsRangeExtension().getCrossComponentPredictionEnabledFlag() || KEEP_PRED_AND_RESI_SIGNALS;
  bool bCheckFull          = true;
  bool bCheckSplit         = false;
  bCheckFull               = !partitioner.canSplit( TU_MAX_TR_SPLIT, cs );
  bCheckSplit              = partitioner.canSplit( TU_MAX_TR_SPLIT, cs );

  if( cu.ispMode )
  {
    bCheckSplit = partitioner.canSplit( ispType, cs );
    bCheckFull = !bCheckSplit;
  }
  uint32_t    numSig           = 0;

  double     dSingleCost                        = MAX_DOUBLE;
  Distortion uiSingleDistLuma                   = 0;
  uint64_t   singleFracBits                     = 0;
#if JVET_O1136_TS_BDPCM_SIGNALLING
  bool       checkTransformSkip                 = sps.getTransformSkipEnabledFlag();
#else
  bool       checkTransformSkip                 = pps.getUseTransformSkip();
#endif
  int        bestModeId[ MAX_NUM_COMPONENT ]    = { 0, 0, 0 };
  uint8_t    nNumTransformCands                 = cu.mtsFlag ? 4 : 1;
  uint8_t    numTransformIndexCands             = nNumTransformCands;

  const TempCtx ctxStart  ( m_CtxCache, m_CABACEstimator->getCtx() );
  TempCtx       ctxBest   ( m_CtxCache );

  CodingStructure *csSplit = nullptr;
  CodingStructure *csFull  = nullptr;

  if( bCheckSplit )
  {
    csSplit = &cs;
  }
  else if( bCheckFull )
  {
    csFull = &cs;
  }

  bool validReturnFull = false;

  if( bCheckFull )
  {
    csFull->cost = 0.0;

    TransformUnit &tu = csFull->addTU( CS::getArea( *csFull, currArea, partitioner.chType ), partitioner.chType );
    tu.depth = currDepth;

    const bool tsAllowed  = TU::isTSAllowed( tu, COMPONENT_Y );
    const bool mtsAllowed = TU::isMTSAllowed( tu, COMPONENT_Y );
    std::vector<TrMode> trModes;

    if( sps.getUseLFNST() )
    {
      checkTransformSkip &= tsAllowed;
      checkTransformSkip &= !cu.mtsFlag;
      checkTransformSkip &= !cu.lfnstIdx;

      if( !cu.mtsFlag && checkTransformSkip )
      {
        trModes.push_back( TrMode( 0, true ) ); //DCT2
        trModes.push_back( TrMode( 1, true ) ); //TS
      }
    }
    else
    {
      nNumTransformCands = 1 + ( tsAllowed ? 1 : 0 ) + ( mtsAllowed ? 4 : 0 ); // DCT + TS + 4 MTS = 6 tests

      trModes.push_back( TrMode( 0, true ) ); //DCT2
      if( tsAllowed )
      {
        trModes.push_back( TrMode( 1, true ) );
      }
      if( mtsAllowed )
      {
        for( int i = 2; i < 6; i++ )
        {
          trModes.push_back( TrMode( i, true ) );
        }
      }
    }

    CHECK( !tu.Y().valid(), "Invalid TU" );

    CodingStructure &saveCS = *m_pSaveCS[0];

    TransformUnit *tmpTU = nullptr;

    Distortion singleDistTmpLuma = 0;
    uint64_t     singleTmpFracBits = 0;
    double     singleCostTmp     = 0;
    int        firstCheckId      = ( sps.getUseLFNST() && mtsCheckRangeFlag && cu.mtsFlag ) ? mtsFirstCheckId : 0;

    //we add the MTS candidates to the loop. TransformSkip will still be the last one to be checked (when modeId == lastCheckId) as long as checkTransformSkip is true
    int        lastCheckId       = sps.getUseLFNST() ? ( ( mtsCheckRangeFlag && cu.mtsFlag ) ? ( mtsLastCheckId + ( int ) checkTransformSkip ) : ( numTransformIndexCands - ( firstCheckId + 1 ) + ( int ) checkTransformSkip ) ) :
                                   trModes[ nNumTransformCands - 1 ].first;
    bool isNotOnlyOneMode        = sps.getUseLFNST() ? lastCheckId != firstCheckId : nNumTransformCands != 1;

    if( isNotOnlyOneMode )
    {
      saveCS.pcv     = cs.pcv;
      saveCS.picture = cs.picture;
      saveCS.area.repositionTo(cs.area);
      saveCS.clearTUs();
      tmpTU = &saveCS.addTU(currArea, partitioner.chType);
    }

    bool    cbfBestMode      = false;
    bool    cbfBestModeValid = false;
    bool    cbfDCT2  = true;

    double bestDCT2cost = MAX_DOUBLE;
    double threshold = m_pcEncCfg->getUseFastISP() && !cu.ispMode && ispIsCurrentWinner && nNumTransformCands > 1 ? 1 + 1.4 / sqrt( cu.lwidth() * cu.lheight() ) : 1;
    for( int modeId = firstCheckId; modeId <= ( sps.getUseLFNST() ? lastCheckId : ( nNumTransformCands - 1 ) ); modeId++ )
    {
      uint8_t transformIndex = modeId;

      if( sps.getUseLFNST() )
      {
        if( ( transformIndex < lastCheckId ) || ( ( transformIndex == lastCheckId ) && !checkTransformSkip ) ) //we avoid this if the mode is transformSkip
        {
          // Skip checking other transform candidates if zero CBF is encountered and it is the best transform so far
          if( m_pcEncCfg->getUseFastLFNST() && transformIndex && !cbfBestMode && cbfBestModeValid )
          {
            continue;
          }
        }
      }
      else
      {
        if( !cbfDCT2 || ( m_pcEncCfg->getUseTransformSkipFast() && bestModeId[ COMPONENT_Y ] == 1 ) )
        {
          break;
        }
        if( !trModes[ modeId ].second )
        {
          continue;
        }
        //we compare the DCT-II cost against the best ISP cost so far (except for TS)
        if( m_pcEncCfg->getUseFastISP() && !cu.ispMode && ispIsCurrentWinner && trModes[ modeId ].first != 0 && ( trModes[ modeId ].first != 1 || !tsAllowed ) && bestDCT2cost > bestCostSoFar * threshold )
        {
          continue;
        }
        tu.mtsIdx = trModes[ modeId ].first;
      }

      //we compare the best cost for non lwip
      const double thresholdSkipMode = 1.0 + (1.4 / sqrt((double)(cu.lwidth() * cu.lheight())));
      if ( cu.mipFlag && tu.mtsIdx && m_bestCostNonMip != MAX_DOUBLE && m_bestCostNonMip * thresholdSkipMode < bestDCT2cost  )
      {
        continue;
      }

      if ((modeId != firstCheckId) && isNotOnlyOneMode)
      {
        m_CABACEstimator->getCtx() = ctxStart;
      }

      int default0Save1Load2 = 0;
      singleDistTmpLuma = 0;

      if( modeId == firstCheckId && ( sps.getUseLFNST() ? ( modeId != lastCheckId ) : ( nNumTransformCands > 1 ) ) )
      {
        default0Save1Load2 = 1;
      }
      else if (modeId != firstCheckId)
      {
        if( sps.getUseLFNST() && !cbfBestModeValid )
        {
          default0Save1Load2 = 1;
        }
        else
        {
          default0Save1Load2 = 2;
        }
      }
      if( cu.ispMode )
      {
        default0Save1Load2 = 0;
      }
      if( sps.getUseLFNST() )
      {
        if( cu.mtsFlag )
        {
          if( moreProbMTSIdxFirst )
          {
            const ChannelType     chType      = toChannelType( COMPONENT_Y );
            const CompArea&       area        = tu.blocks[ COMPONENT_Y ];
            const PredictionUnit& pu          = *cs.getPU( area.pos(), chType );
            uint32_t              uiIntraMode = pu.intraDir[ chType ];

            if( transformIndex == 1 )
            {
              tu.mtsIdx = ( uiIntraMode < 34 ) ? MTS_DST7_DCT8 : MTS_DCT8_DST7;
            }
            else if( transformIndex == 2 )
            {
              tu.mtsIdx = ( uiIntraMode < 34 ) ? MTS_DCT8_DST7 : MTS_DST7_DCT8;
            }
            else
            {
              tu.mtsIdx = MTS_DST7_DST7 + transformIndex;
            }
          }
          else
          {
            tu.mtsIdx = MTS_DST7_DST7 + transformIndex;
          }
        }
        else
        {
          tu.mtsIdx = transformIndex;
        }

        if( !cu.mtsFlag && checkTransformSkip )
        {
          xIntraCodingTUBlock( tu, COMPONENT_Y, false, singleDistTmpLuma, default0Save1Load2, &numSig, modeId == 0 ? &trModes : nullptr, true );
          if( modeId == 0 )
          {
            for( int i = 0; i < 2; i++ )
            {