/work/vvenc/source/Lib/CommonLib/DepQuant.cpp

Source
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#include "DepQuant.h"
#include "TrQuant.h"
#include "CodingStructure.h"
#include "UnitTools.h"

#include <bitset>

//! \ingroup CommonLib
//! \{

namespace vvenc {


namespace DQIntern
{
  static void findFirstPos( int& firstTestPos, const TCoeff* tCoeff, const DQIntern::TUParameters& tuPars, int defaultTh,
                            bool zeroOutForThres, int zeroOutWidth, int zeroOutHeight )
  {
    for( ; firstTestPos >= 0; firstTestPos-- )
    {
      if( zeroOutForThres && ( tuPars.m_scanId2BlkPos[firstTestPos].x >= zeroOutWidth ||
                              tuPars.m_scanId2BlkPos[firstTestPos].y >= zeroOutHeight ) )
      {
        continue;
      }
      if( abs( tCoeff[tuPars.m_scanId2BlkPos[firstTestPos].idx] ) > defaultTh )
      {
        break;
      }
    }
  }

  void Rom::xInitScanArrays()
  {
    if( m_scansInitialized )
    {
      return;
    }
    ::memset( m_scanId2NbInfoSbbArray, 0, sizeof(m_scanId2NbInfoSbbArray) );
    ::memset( m_scanId2NbInfoOutArray, 0, sizeof(m_scanId2NbInfoOutArray) );
    ::memset( m_tuParameters,          0, sizeof(m_tuParameters) );

    uint32_t raster2id[ MAX_CU_SIZE * MAX_CU_SIZE ];
    ::memset(raster2id, 0, sizeof(raster2id));

    for( int hd = 0; hd < MAX_TU_SIZE_IDX; hd++ )
    {
      for( int vd = 0; vd < MAX_TU_SIZE_IDX; vd++ )
      {
        if( (hd == 0 && vd <= 1) || (hd <= 1 && vd == 0) )
        {
          continue;
        }
        const uint32_t      blockWidth    = (1 << hd);
        const uint32_t      blockHeight   = (1 << vd);
        const uint32_t      log2CGWidth   = g_log2SbbSize[hd][vd][0];
        const uint32_t      log2CGHeight  = g_log2SbbSize[hd][vd][1];
        const uint32_t      groupWidth    = 1 << log2CGWidth;
        const uint32_t      groupHeight   = 1 << log2CGHeight;
        const uint32_t      groupSize     = groupWidth * groupHeight;
        const SizeType      blkWidthIdx   = Log2( blockWidth );
        const SizeType      blkHeightIdx  = Log2( blockHeight );
        const ScanElement * scanId2RP     = getScanOrder( SCAN_GROUPED_4x4, blkWidthIdx, blkHeightIdx );
        NbInfoSbb*&         sId2NbSbb     = m_scanId2NbInfoSbbArray[hd][vd];
        NbInfoOut*&         sId2NbOut     = m_scanId2NbInfoOutArray[hd][vd];
        // consider only non-zero-out region
        const uint32_t      blkWidthNZOut = std::min<unsigned>( JVET_C0024_ZERO_OUT_TH, blockWidth  );
        const uint32_t      blkHeightNZOut= std::min<unsigned>( JVET_C0024_ZERO_OUT_TH, blockHeight );
        const uint32_t      totalValues   = blkWidthNZOut * blkHeightNZOut;

        sId2NbSbb = new NbInfoSbb[ totalValues ];
        sId2NbOut = new NbInfoOut[ totalValues ];

        for( uint32_t scanId = 0; scanId < totalValues; scanId++ )
        {
          raster2id[scanId2RP[scanId].idx] = scanId;
          sId2NbSbb[scanId].numInv = 0;
        }

        for( unsigned scanId = 0; scanId < totalValues; scanId++ )
        {
          const int posX = scanId2RP[scanId].x;
          const int posY = scanId2RP[scanId].y;
          const int rpos = scanId2RP[scanId].idx;
          {
            //===== inside subband neighbours =====
            const int      begSbb = scanId - ( scanId & (groupSize-1) ); // first pos in current subblock
            int            cpos[5];

            cpos[0] = ( posX + 1 < blkWidthNZOut                              ? ( raster2id[rpos+1           ] < groupSize + begSbb ? raster2id[rpos+1           ] - begSbb : 0 ) : 0 );
            cpos[1] = ( posX + 2 < blkWidthNZOut                              ? ( raster2id[rpos+2           ] < groupSize + begSbb ? raster2id[rpos+2           ] - begSbb : 0 ) : 0 );
            cpos[2] = ( posX + 1 < blkWidthNZOut && posY + 1 < blkHeightNZOut ? ( raster2id[rpos+1+blockWidth] < groupSize + begSbb ? raster2id[rpos+1+blockWidth] - begSbb : 0 ) : 0 );
            cpos[3] = ( posY + 1 < blkHeightNZOut                             ? ( raster2id[rpos+  blockWidth] < groupSize + begSbb ? raster2id[rpos+  blockWidth] - begSbb : 0 ) : 0 );
            cpos[4] = ( posY + 2 < blkHeightNZOut                             ? ( raster2id[rpos+2*blockWidth] < groupSize + begSbb ? raster2id[rpos+2*blockWidth] - begSbb : 0 ) : 0 );

            int num = 0;
            int inPos[5] = { 0, };

            while( true )
            {
              int nk = -1;
              for( int k = 0; k < 5; k++ )
              {
                if( cpos[k] != 0 && ( nk < 0 || cpos[k] < cpos[nk] ) )
                {
                  nk = k;
                }
              }
              if( nk < 0 )
              {
                break;
              }
              inPos[ num++ ] = uint8_t( cpos[nk] );
              cpos[nk] = 0;
            }
            for( int k = num; k < 5; k++ )
            {
              inPos[k] = 0;
            }
            for( int k = 0; k < num; k++ )
            {
              CHECK( sId2NbSbb[begSbb + inPos[k]].numInv >= 5, "" );
              sId2NbSbb[begSbb + inPos[k]].invInPos[sId2NbSbb[begSbb + inPos[k]].numInv++] = scanId & ( groupSize - 1 );
            }
          }
          {
            //===== outside subband neighbours =====
            NbInfoOut&     nbOut  = sId2NbOut[ scanId ];
            const int      begSbb = scanId - ( scanId & (groupSize-1) ); // first pos in current subblock
            int            cpos[5];

            cpos[0] = ( posX + 1 < blkWidthNZOut                              ? ( raster2id[rpos+1           ] >= groupSize + begSbb ? raster2id[rpos+1           ] : 0 ) : 0 );
            cpos[1] = ( posX + 2 < blkWidthNZOut                              ? ( raster2id[rpos+2           ] >= groupSize + begSbb ? raster2id[rpos+2           ] : 0 ) : 0 );
            cpos[2] = ( posX + 1 < blkWidthNZOut && posY + 1 < blkHeightNZOut ? ( raster2id[rpos+1+blockWidth] >= groupSize + begSbb ? raster2id[rpos+1+blockWidth] : 0 ) : 0 );
            cpos[3] = ( posY + 1 < blkHeightNZOut                             ? ( raster2id[rpos+  blockWidth] >= groupSize + begSbb ? raster2id[rpos+  blockWidth] : 0 ) : 0 );
            cpos[4] = ( posY + 2 < blkHeightNZOut                             ? ( raster2id[rpos+2*blockWidth] >= groupSize + begSbb ? raster2id[rpos+2*blockWidth] : 0 ) : 0 );

            for( nbOut.num = 0; true; )
            {
              int nk = -1;
              for( int k = 0; k < 5; k++ )
              {
                if( cpos[k] != 0 && ( nk < 0 || cpos[k] < cpos[nk] ) )
                {
                  nk = k;
                }
              }
              if( nk < 0 )
              {
                break;
              }
              nbOut.outPos[ nbOut.num++ ] = uint16_t( cpos[nk] );
              cpos[nk] = 0;
            }
            for( int k = nbOut.num; k < 5; k++ )
            {
              nbOut.outPos[k] = 0;
            }
            nbOut.maxDist = ( scanId == 0 ? 0 : sId2NbOut[scanId-1].maxDist );
            for( int k = 0; k < nbOut.num; k++ )
            {
              if( nbOut.outPos[k] > nbOut.maxDist )
              {
                nbOut.maxDist = nbOut.outPos[k];
              }
            }
          }
        }

        // make it relative
        for( unsigned scanId = 0; scanId < totalValues; scanId++ )
        {
          NbInfoOut& nbOut  = sId2NbOut[scanId];
          const int  begSbb = scanId - ( scanId & (groupSize-1) ); // first pos in current subblock
          for( int k = 0; k < nbOut.num; k++ )
          {
            CHECK(begSbb > nbOut.outPos[k], "Position must be past sub block begin");
            nbOut.outPos[k] -= begSbb;
          }
          nbOut.maxDist -= scanId;
        }

        for( int chId = 0; chId < MAX_NUM_CH; chId++ )
        {
          m_tuParameters[hd][vd][chId] = new TUParameters( *this, blockWidth, blockHeight, ChannelType(chId) );
        }
      }
    }
    m_scansInitialized = true;
  }

  void Rom::xUninitScanArrays()
  {
    if( !m_scansInitialized )
    {
      return;
    }
    for( int hd = 0; hd < MAX_TU_SIZE_IDX; hd++ )
    {
      for( int vd = 0; vd < MAX_TU_SIZE_IDX; vd++ )
      {
        NbInfoSbb*& sId2NbSbb = m_scanId2NbInfoSbbArray[hd][vd];
        NbInfoOut*& sId2NbOut = m_scanId2NbInfoOutArray[hd][vd];
        if( sId2NbSbb )
        {
          delete [] sId2NbSbb;
        }
        if( sId2NbOut )
        {
          delete [] sId2NbOut;
        }
        for( int chId = 0; chId < MAX_NUM_CH; chId++ )
        {
          TUParameters*& tuPars = m_tuParameters[hd][vd][chId];
          if( tuPars )
          {
            delete tuPars;
          }
        }
      }
    }
    m_scansInitialized = false;
  }


  TUParameters::TUParameters( const Rom& rom, const unsigned width, const unsigned height, const ChannelType chType )
  {
    m_chType              = chType;
    m_width               = width;
    m_height              = height;
    const uint32_t nonzeroWidth  = std::min<uint32_t>(JVET_C0024_ZERO_OUT_TH, m_width);
    const uint32_t nonzeroHeight = std::min<uint32_t>(JVET_C0024_ZERO_OUT_TH, m_height);
    m_numCoeff                   = nonzeroWidth * nonzeroHeight;
    m_log2SbbWidth        = g_log2SbbSize[ Log2(m_width) ][ Log2(m_height) ][0];
    m_log2SbbHeight       = g_log2SbbSize[ Log2(m_width) ][ Log2(m_height) ][1];
    m_log2SbbSize         = m_log2SbbWidth + m_log2SbbHeight;
    m_sbbSize             = ( 1 << m_log2SbbSize );
    m_sbbMask             = m_sbbSize - 1;
    m_widthInSbb  = nonzeroWidth >> m_log2SbbWidth;
    m_heightInSbb = nonzeroHeight >> m_log2SbbHeight;
    m_numSbb              = m_widthInSbb * m_heightInSbb;
    SizeType        hsbb  = Log2( m_widthInSbb  );
    SizeType        vsbb  = Log2( m_heightInSbb );
    SizeType        hsId  = Log2( m_width  );
    SizeType        vsId  = Log2( m_height );
    m_scanSbbId2SbbPos    = getScanOrder( SCAN_UNGROUPED   , hsbb , vsbb );
    m_scanId2BlkPos       = getScanOrder( SCAN_GROUPED_4x4 , hsId , vsId );
    int log2W             = Log2( m_width  );
    int log2H             = Log2( m_height );
    m_scanId2NbInfoSbb    = rom.getNbInfoSbb( log2W, log2H );
    m_scanId2NbInfoOut    = rom.getNbInfoOut( log2W, log2H );
    m_scanInfo            = new ScanInfo[ m_numCoeff ];
    for( int scanIdx = 0; scanIdx < m_numCoeff; scanIdx++ )
    {
      xSetScanInfo( m_scanInfo[scanIdx], scanIdx );
    }
  }


  void TUParameters::xSetScanInfo( ScanInfo& scanInfo, int scanIdx )
  {
    scanInfo.sbbSize    = m_sbbSize;
    scanInfo.numSbb     = m_numSbb;
    scanInfo.scanIdx    = scanIdx;
    scanInfo.rasterPos  = m_scanId2BlkPos[scanIdx].idx;
    scanInfo.sbbPos     = m_scanSbbId2SbbPos[scanIdx >> m_log2SbbSize].idx;
    scanInfo.insidePos  = scanIdx & m_sbbMask;
    scanInfo.spt        = SCAN_ISCSBB;
    if(  scanInfo.insidePos == m_sbbMask && scanIdx > scanInfo.sbbSize && scanIdx < m_numCoeff - 1 )
      scanInfo.spt      = SCAN_SOCSBB;
    else if( scanInfo.insidePos == 0 && scanIdx > 0 && scanIdx < m_numCoeff - m_sbbSize )
      scanInfo.spt      = SCAN_EOCSBB;
    scanInfo.posX = m_scanId2BlkPos[scanIdx].x;
    scanInfo.posY = m_scanId2BlkPos[scanIdx].y;
    if( scanIdx )
    {
      const int nextScanIdx = scanIdx - 1;
      const int diag        = m_scanId2BlkPos[nextScanIdx].x + m_scanId2BlkPos[nextScanIdx].y;
      if( m_chType == CH_L )
      {
        scanInfo.sigCtxOffsetNext = ( diag < 2 ? 8 : diag < 5 ?  4 : 0 );
        scanInfo.gtxCtxOffsetNext = ( diag < 1 ? 16 : diag < 3 ? 11 : diag < 10 ? 6 : 1 );
      }
      else
      {
        scanInfo.sigCtxOffsetNext = ( diag < 2 ? 4 : 0 );
        scanInfo.gtxCtxOffsetNext = ( diag < 1 ? 6 : 1 );
      }
      scanInfo.nextInsidePos      = nextScanIdx & m_sbbMask;
      scanInfo.currNbInfoSbb      = m_scanId2NbInfoSbb[ scanIdx ];
      if( scanInfo.insidePos == 0 )
      {
        const int nextSbbPos  = m_scanSbbId2SbbPos[nextScanIdx >> m_log2SbbSize].idx;
        const int nextSbbPosY = nextSbbPos               / m_widthInSbb;
        const int nextSbbPosX = nextSbbPos - nextSbbPosY * m_widthInSbb;
        scanInfo.nextSbbRight = ( nextSbbPosX < m_widthInSbb  - 1 ? nextSbbPos + 1            : 0 );
        scanInfo.nextSbbBelow = ( nextSbbPosY < m_heightInSbb - 1 ? nextSbbPos + m_widthInSbb : 0 );
      }
    }
  }

  void RateEstimator::initCtx( const TUParameters& tuPars, const TransformUnit& tu, const ComponentID compID, const FracBitsAccess& fracBitsAccess )
  {
    m_scanId2Pos = tuPars.m_scanId2BlkPos;
    xSetSigSbbFracBits  ( fracBitsAccess, tuPars.m_chType );
    xSetSigFlagBits     ( fracBitsAccess, tuPars.m_chType );
    xSetGtxFlagBits     ( fracBitsAccess, tuPars.m_chType );
    xSetLastCoeffOffset ( fracBitsAccess, tuPars, tu, compID );
  }

  void RateEstimator::xSetLastCoeffOffset( const FracBitsAccess& fracBitsAccess, const TUParameters& tuPars, const TransformUnit& tu, const ComponentID compID )
  {
    const ChannelType chType = ( compID == COMP_Y ? CH_L : CH_C );
    int32_t cbfDeltaBits = 0;
    if( compID == COMP_Y && !CU::isIntra(*tu.cu) && !tu.depth )
    {
      const BinFracBits bits  = fracBitsAccess.getFracBitsArray( Ctx::QtRootCbf() );
      cbfDeltaBits            = int32_t( bits.intBits[1] ) - int32_t( bits.intBits[0] );
    }
    else
    {
      BinFracBits bits;
      bool prevLumaCbf           = false;
      bool lastCbfIsInferred     = false;
      bool useIntraSubPartitions = tu.cu->ispMode && isLuma(chType);
      if( useIntraSubPartitions )
      {
        bool rootCbfSoFar = false;
        bool isLastSubPartition = CU::isISPLast(*tu.cu, tu.Y(), compID);
        uint32_t nTus = tu.cu->ispMode == HOR_INTRA_SUBPARTITIONS ? tu.cu->lheight() >> Log2(tu.lheight()) : tu.cu->lwidth() >> Log2(tu.lwidth());
        if( isLastSubPartition )
        {
          TransformUnit* tuPointer = tu.cu->firstTU;
          for( int tuIdx = 0; tuIdx < nTus - 1; tuIdx++ )
          {
            rootCbfSoFar |= TU::getCbfAtDepth(*tuPointer, COMP_Y, tu.depth);
            tuPointer     = tuPointer->next;
          }
          if( !rootCbfSoFar )
          {
            lastCbfIsInferred = true;
          }
        }
        if( !lastCbfIsInferred )
        {
          prevLumaCbf = TU::getPrevTuCbfAtDepth(tu, compID, tu.depth);
        }
        bits = fracBitsAccess.getFracBitsArray(Ctx::QtCbf[compID](DeriveCtx::CtxQtCbf(compID, prevLumaCbf, true)));
      }
      else
      {
        bits = fracBitsAccess.getFracBitsArray(Ctx::QtCbf[compID](DeriveCtx::CtxQtCbf(compID, tu.cbf[COMP_Cb])));
      }
      cbfDeltaBits = lastCbfIsInferred ? 0 : int32_t(bits.intBits[1]) - int32_t(bits.intBits[0]);
    }

    static const unsigned prefixCtx[] = { 0, 0, 0, 3, 6, 10, 15, 21 };
    uint32_t              ctxBits  [ LAST_SIGNIFICANT_GROUPS ];
    for( unsigned xy = 0; xy < 2; xy++ )
    {
      int32_t             bitOffset   = ( xy ? cbfDeltaBits : 0 );
      int32_t*            lastBits    = ( xy ? m_lastBitsY : m_lastBitsX );
      const unsigned      size        = ( xy ? tuPars.m_height : tuPars.m_width );
      const unsigned      log2Size    = Log2( size );
      const bool          useYCtx     = ( xy != 0 );
      const CtxSet&       ctxSetLast  = ( useYCtx ? Ctx::LastY : Ctx::LastX )[ chType ];
      const unsigned      lastShift   = ( compID == COMP_Y ? (log2Size+1)>>2 : Clip3<unsigned>(0,2,size>>3) );
      const unsigned      lastOffset  = ( compID == COMP_Y ? ( prefixCtx[log2Size] ) : 0 );
      uint32_t            sumFBits    = 0;
      unsigned            maxCtxId    = g_uiGroupIdx[std::min<unsigned>(JVET_C0024_ZERO_OUT_TH, size) - 1];
      for( unsigned ctxId = 0; ctxId < maxCtxId; ctxId++ )
      {
        const BinFracBits bits  = fracBitsAccess.getFracBitsArray( ctxSetLast( lastOffset + ( ctxId >> lastShift ) ) );
        ctxBits[ ctxId ]        = sumFBits + bits.intBits[0] + ( ctxId>3 ? ((ctxId-2)>>1)<<SCALE_BITS : 0 ) + bitOffset;
        sumFBits               +=            bits.intBits[1];
      }
      ctxBits  [ maxCtxId ]     = sumFBits + ( maxCtxId>3 ? ((maxCtxId-2)>>1)<<SCALE_BITS : 0 ) + bitOffset;
      for (unsigned pos = 0; pos < std::min<unsigned>(JVET_C0024_ZERO_OUT_TH, size); pos++)
      {
        lastBits[ pos ]         = ctxBits[ g_uiGroupIdx[ pos ] ];
      }
    }
  }

  void RateEstimator::xSetSigSbbFracBits( const FracBitsAccess& fracBitsAccess, ChannelType chType )
  {
    const CtxSet& ctxSet = Ctx::SigCoeffGroup[ chType ];
    for( unsigned ctxId = 0; ctxId < sm_maxNumSigSbbCtx; ctxId++ )
    {
      m_sigSbbFracBits[ ctxId ] = fracBitsAccess.getFracBitsArray( ctxSet( ctxId ) );
    }
  }

  void RateEstimator::xSetSigFlagBits( const FracBitsAccess& fracBitsAccess, ChannelType chType )
  {
    for( unsigned ctxSetId = 0; ctxSetId < sm_numCtxSetsSig; ctxSetId++ )
    {
      BinFracBits*    bits    = m_sigFracBits [ ctxSetId ];
      const CtxSet&   ctxSet  = Ctx::SigFlag  [ chType + 2*ctxSetId ];
      const unsigned  numCtx  = ( chType == CH_L ? 12 : 8 );
      for( unsigned ctxId = 0; ctxId < numCtx; ctxId++ )
      {
        bits[ ctxId ] = fracBitsAccess.getFracBitsArray( ctxSet( ctxId ) );
      }
    }
  }

  void RateEstimator::xSetGtxFlagBits( const FracBitsAccess& fracBitsAccess, ChannelType chType )
  {
    const CtxSet&   ctxSetPar   = Ctx::ParFlag [     chType ];
    const CtxSet&   ctxSetGt1   = Ctx::GtxFlag [ 2 + chType ];
    const CtxSet&   ctxSetGt2   = Ctx::GtxFlag [     chType ];
    const unsigned  numCtx      = ( chType == CH_L ? 21 : 11 );
    for( unsigned ctxId = 0; ctxId < numCtx; ctxId++ )
    {
      BinFracBits     fbPar = fracBitsAccess.getFracBitsArray( ctxSetPar( ctxId ) );
      BinFracBits     fbGt1 = fracBitsAccess.getFracBitsArray( ctxSetGt1( ctxId ) );
      BinFracBits     fbGt2 = fracBitsAccess.getFracBitsArray( ctxSetGt2( ctxId ) );
      CoeffFracBits&  cb    = m_gtxFracBits[ ctxId ];
      int32_t         par0  = (1<<SCALE_BITS) + int32_t(fbPar.intBits[0]);
      int32_t         par1  = (1<<SCALE_BITS) + int32_t(fbPar.intBits[1]);
      cb.bits[0] = 0;
      cb.bits[1] = fbGt1.intBits[0] + (1 << SCALE_BITS);
      cb.bits[2] = fbGt1.intBits[1] + par0 + fbGt2.intBits[0];
      cb.bits[3] = fbGt1.intBits[1] + par1 + fbGt2.intBits[0];
      cb.bits[4] = fbGt1.intBits[1] + par0 + fbGt2.intBits[1];
      cb.bits[5] = fbGt1.intBits[1] + par1 + fbGt2.intBits[1];
    }
  }

  void CommonCtx::update( const ScanInfo& scanInfo, const int prevId, int stateId, StateMem& curr )
  {
    uint8_t*    sbbFlags  = m_currSbbCtx[stateId].sbbFlags;
    uint8_t*    levels    = m_currSbbCtx[stateId].levels;
    uint16_t    maxDist   = m_nbInfo[scanInfo.scanIdx - 1].maxDist;
    uint16_t    sbbSize   = scanInfo.sbbSize;
    std::size_t setCpSize = ( maxDist > sbbSize ? maxDist - sbbSize : 0 ) * sizeof( uint8_t );
    if( prevId >= 0 )
    {
      ::memcpy( sbbFlags, m_prevSbbCtx[prevId].sbbFlags, scanInfo.numSbb * sizeof( uint8_t ) );
      ::memcpy( levels + scanInfo.scanIdx + sbbSize, m_prevSbbCtx[prevId].levels + scanInfo.scanIdx + sbbSize, setCpSize );
    }
    else
    {
      ::memset( sbbFlags, 0, scanInfo.numSbb * sizeof( uint8_t ) );
      ::memset( levels + scanInfo.scanIdx + sbbSize, 0, setCpSize );
    }
    sbbFlags[scanInfo.sbbPos] = !!curr.numSig[stateId];

    const int       sigNSbb = ( ( scanInfo.nextSbbRight ? sbbFlags[scanInfo.nextSbbRight] : false ) || ( scanInfo.nextSbbBelow ? sbbFlags[scanInfo.nextSbbBelow] : false ) ? 1 : 0 );
    curr.refSbbCtxId[stateId] = stateId;
    const BinFracBits sbbBits = m_sbbFlagBits[sigNSbb];

    curr.sbbBits0[stateId] = sbbBits.intBits[0];
    curr.sbbBits1[stateId] = sbbBits.intBits[1];

    if( sigNSbb || ( ( scanInfo.nextSbbRight && scanInfo.nextSbbBelow ) ? sbbFlags[scanInfo.nextSbbBelow + 1] : false ) )
    {
      const int         scanBeg = scanInfo.scanIdx - scanInfo.sbbSize;
      const NbInfoOut* nbOut = m_nbInfo + scanBeg;
      const uint8_t* absLevels = levels + scanBeg;

      for( int id = 0; id < scanInfo.sbbSize; id++, nbOut++ )
      {
        if( nbOut->num )
        {
          TCoeff sumAbs = 0, sumAbs1 = 0, sumNum = 0;
#define UPDATE(k) {TCoeff t=absLevels[nbOut->outPos[k]]; sumAbs+=t; sumAbs1+=std::min<TCoeff>(4+(t&1),t); sumNum+=!!t; }
          switch( nbOut->num )
          {
          default:
          case 5:
            UPDATE( 4 );
          case 4:
            UPDATE( 3 );
          case 3:
            UPDATE( 2 );
          case 2:
            UPDATE( 1 );
          case 1:
            UPDATE( 0 );
          }
#undef UPDATE
          curr.tplAcc[id][stateId] = ( sumNum << 5 ) | sumAbs1;
          curr.sum1st[id][stateId] = ( uint8_t ) std::min( 255, sumAbs );
        }
      }
    }
  }

  void Quantizer::initQuantBlock(const TransformUnit& tu, const ComponentID compID, const QpParam& cQP, const double lambda, int gValue)
  {
    CHECKD( lambda <= 0.0, "Lambda must be greater than 0" );

    const int         qpDQ                  = cQP.Qp(tu.mtsIdx[compID]==MTS_SKIP) + 1;
    const int         qpPer                 = qpDQ / 6;
    const int         qpRem                 = qpDQ - 6 * qpPer;
    const SPS&        sps                   = *tu.cs->sps;
    const CompArea&   area                  = tu.blocks[ compID ];
    const ChannelType chType                = toChannelType( compID );
    const int         channelBitDepth       = sps.bitDepths[ chType ];
    const int         maxLog2TrDynamicRange = sps.getMaxLog2TrDynamicRange();
    const int         nomTransformShift     = getTransformShift( channelBitDepth, area.size(), maxLog2TrDynamicRange );
    const bool    needsSqrt2ScaleAdjustment = TU::needsSqrt2Scale(tu, compID);
    const int         transformShift        = nomTransformShift + (needsSqrt2ScaleAdjustment?-1:0);
    // quant parameters
    m_QShift                    = QUANT_SHIFT  - 1 + qpPer + transformShift;
    m_QAdd                      = -( ( 3 << m_QShift ) >> 1 );
    Intermediate_Int  invShift  = IQUANT_SHIFT + 1 - qpPer - transformShift;
    m_QScale                    = g_quantScales[needsSqrt2ScaleAdjustment?1:0][ qpRem ];
    const unsigned    qIdxBD    = std::min<unsigned>( maxLog2TrDynamicRange + 1, 8*sizeof(Intermediate_Int) + invShift - IQUANT_SHIFT - 1 );
    m_maxQIdx                   = ( 1 << (qIdxBD-1) ) - 4;
    if( m_QShift )
      m_thresLast               = TCoeff((int64_t(m_DqThrVal) << (m_QShift-1)));
    else
      m_thresLast               = TCoeff((int64_t(m_DqThrVal>>1) << m_QShift));
    m_thresSSbb                 = TCoeff((int64_t(3) << m_QShift));
    // distortion calculation parameters
    const int64_t qScale        = (gValue==-1) ? m_QScale : gValue;
    const int nomDShift =
      SCALE_BITS - 2 * (nomTransformShift + DISTORTION_PRECISION_ADJUSTMENT(channelBitDepth)) + m_QShift + (needsSqrt2ScaleAdjustment ? 1 : 0);
    const double  qScale2       = double( qScale * qScale );
    const double  nomDistFactor = ( nomDShift < 0 ? 1.0/(double(int64_t(1)<<(-nomDShift))*qScale2*lambda) : double(int64_t(1)<<nomDShift)/(qScale2*lambda) );
    const uint32_t pow2dfShift   = (uint32_t)( nomDistFactor * qScale2 ) + 1;
    const int     dfShift       = ceilLog2( pow2dfShift );
    m_DistShift                 = 62 + m_QShift - 2*maxLog2TrDynamicRange - dfShift;
    m_DistAdd                   = (int64_t(1) << m_DistShift) >> 1;
    m_DistStepAdd               = ((m_DistShift+m_QShift)>=64 ? (int64_t)( nomDistFactor * pow(2,m_DistShift+m_QShift) + .5 ) : (int64_t)( nomDistFactor * double(int64_t(1)<<(m_DistShift+m_QShift)) + .5 ));
    m_DistOrgFact               = (int64_t)( nomDistFactor * double(int64_t(1)<<(m_DistShift+1       )) + .5 );
  }

  void Quantizer::dequantBlock( const TransformUnit& tu, const ComponentID compID, const QpParam& cQP, CoeffBuf& recCoeff, bool enableScalingLists, int* piDequantCoef) const
  {

    //----- set basic parameters -----
    const CompArea&     area      = tu.blocks[ compID ];
    const int           numCoeff  = area.area();
    const SizeType      hsId      = Log2( area.width );
    const SizeType      vsId      = Log2( area.height );
    const ScanElement  *scan      = getScanOrder( SCAN_GROUPED_4x4, hsId, vsId );
    const TCoeffSig*    qCoeff    = tu.getCoeffs( compID ).buf;
          TCoeff*       tCoeff    = recCoeff.buf;

    //----- reset coefficients and get last scan index -----
    ::memset( tCoeff, 0, numCoeff * sizeof( TCoeff ) );
    int lastScanIdx = tu.lastPos[compID];
    if( lastScanIdx < 0 )
    {
      return;
    }

    //----- set dequant parameters -----
    const int         qpDQ                  = cQP.Qp(tu.mtsIdx[compID]==MTS_SKIP) + 1;
    const int         qpPer                 = qpDQ / 6;
    const int         qpRem                 = qpDQ - 6 * qpPer;
    const SPS&        sps                   = *tu.cs->sps;
    const ChannelType chType                = toChannelType( compID );
    const int         channelBitDepth       = sps.bitDepths[ chType ];
    const int         maxLog2TrDynamicRange = sps.getMaxLog2TrDynamicRange();
    const TCoeff      minTCoeff             = -( 1 << maxLog2TrDynamicRange );
    const TCoeff      maxTCoeff             =  ( 1 << maxLog2TrDynamicRange ) - 1;
    const int         nomTransformShift     = getTransformShift( channelBitDepth, area.size(), maxLog2TrDynamicRange );
    const bool    needsSqrt2ScaleAdjustment = TU::needsSqrt2Scale(tu, compID);
    const int         transformShift        = nomTransformShift + (needsSqrt2ScaleAdjustment?-1:0);
    Intermediate_Int  shift                 = IQUANT_SHIFT + 1 - qpPer - transformShift + (enableScalingLists ? LOG2_SCALING_LIST_NEUTRAL_VALUE : 0);
    Intermediate_Int  invQScale             = g_invQuantScales[needsSqrt2ScaleAdjustment?1:0][ qpRem ];
    Intermediate_Int  add                   = (shift < 0) ? 0 : ((1 << shift) >> 1);
    //----- dequant coefficients -----
    for( int state = 0, scanIdx = lastScanIdx; scanIdx >= 0; scanIdx-- )
    {
      const unsigned   rasterPos = scan[scanIdx].idx;
      const TCoeffSig& level     = qCoeff[ rasterPos ];
      if( level )
      {
        if (enableScalingLists)
          invQScale = piDequantCoef[rasterPos];//scalingfactor*levelScale
        if (shift < 0 && (enableScalingLists || scanIdx == lastScanIdx))
        {
          invQScale <<= -shift;
        }
        Intermediate_Int qIdx = 2 * level + (level > 0 ? -(state>>1) : (state>>1));
        int64_t  nomTCoeff          = ((int64_t)qIdx * (int64_t)invQScale + add) >> ((shift < 0) ? 0 : shift);
        tCoeff[rasterPos]           = (TCoeff)Clip3<int64_t>(minTCoeff, maxTCoeff, nomTCoeff);
      }
      state = ( 32040 >> ((state<<2)+((level&1)<<1)) ) & 3;   // the 16-bit value "32040" represent the state transition table
    }
  }

  bool Quantizer::preQuantCoeff( const TCoeff absCoeff, PQData* pqData, int quanCoeff ) const
  {
    int64_t scaledOrg = int64_t( absCoeff ) * quanCoeff;
    TCoeff  qIdx      = TCoeff( ( scaledOrg + m_QAdd ) >> m_QShift );

    if( qIdx < 0 )
    {
      int64_t scaledAdd = m_DistStepAdd - scaledOrg * m_DistOrgFact;
      PQData& pq_a      = pqData[1];
      PQData& pq_b      = pqData[2];

      pq_a.deltaDist    = ( ( scaledAdd + 0 * m_DistStepAdd ) * 1 + m_DistAdd ) >> m_DistShift;
      pq_a.absLevel     = 1;

      pq_b.deltaDist    = ( ( scaledAdd + 1 * m_DistStepAdd ) * 2 + m_DistAdd ) >> m_DistShift;
      pq_b.absLevel     = 1;
      
      return true;
    }
     
    qIdx              = std::max<TCoeff>( 1, std::min<TCoeff>( m_maxQIdx, qIdx ) );
    int64_t scaledAdd = qIdx * m_DistStepAdd - scaledOrg * m_DistOrgFact;

    PQData& pq_a      = pqData[( qIdx + 0 ) & 3];
    PQData& pq_b      = pqData[( qIdx + 1 ) & 3];
    PQData& pq_c      = pqData[( qIdx + 2 ) & 3];
    PQData& pq_d      = pqData[( qIdx + 3 ) & 3];

    pq_a.deltaDist    = ( ( scaledAdd + 0 * m_DistStepAdd ) * ( qIdx + 0 ) + m_DistAdd ) >> m_DistShift;
    pq_a.absLevel     = ( qIdx + 1 ) >> 1;

    pq_b.deltaDist    = ( ( scaledAdd + 1 * m_DistStepAdd ) * ( qIdx + 1 ) + m_DistAdd ) >> m_DistShift;
    pq_b.absLevel     = ( qIdx + 2 ) >> 1;

    pq_c.deltaDist    = ( ( scaledAdd + 2 * m_DistStepAdd ) * ( qIdx + 2 ) + m_DistAdd ) >> m_DistShift;
    pq_c.absLevel     = ( qIdx + 3 ) >> 1;

    pq_d.deltaDist    = ( ( scaledAdd + 3 * m_DistStepAdd ) * ( qIdx + 3 ) + m_DistAdd ) >> m_DistShift;
    pq_d.absLevel     = ( qIdx + 4 ) >> 1;

    return false;
  }

  const int32_t g_goRiceBits[4][RICEMAX] =
  {
    { 32768,  65536,  98304, 131072, 163840, 196608, 262144, 262144, 327680, 327680, 327680, 327680, 393216, 393216, 393216, 393216, 393216, 393216, 393216, 393216, 458752, 458752, 458752, 458752, 458752, 458752, 458752, 458752, 458752, 458752, 458752, 458752},
    { 65536,  65536,  98304,  98304, 131072, 131072, 163840, 163840, 196608, 196608, 229376, 229376, 294912, 294912, 294912, 294912, 360448, 360448, 360448, 360448, 360448, 360448, 360448, 360448, 425984, 425984, 425984, 425984, 425984, 425984, 425984, 425984},
    { 98304,  98304,  98304,  98304, 131072, 131072, 131072, 131072, 163840, 163840, 163840, 163840, 196608, 196608, 196608, 196608, 229376, 229376, 229376, 229376, 262144, 262144, 262144, 262144, 327680, 327680, 327680, 327680, 327680, 327680, 327680, 327680},
    {131072, 131072, 131072, 131072, 131072, 131072, 131072, 131072, 163840, 163840, 163840, 163840, 163840, 163840, 163840, 163840, 196608, 196608, 196608, 196608, 196608, 196608, 196608, 196608, 229376, 229376, 229376, 229376, 229376, 229376, 229376, 229376}
  };

  static inline void initStates( const int stateId, DQIntern::StateMem& state )
  {
    state.rdCost[stateId]         = DQIntern::rdCostInit;
    state.ctx.cff[stateId]        =  0;
    state.ctx.sig[stateId]        =  0;
    state.numSig[stateId]         =  0;
    state.refSbbCtxId[stateId]    = -1;
    state.remRegBins[stateId]     =  4;
    state.cffBitsCtxOffset        =  0;
    state.m_goRicePar[stateId]    =  0;
    state.m_goRiceZero[stateId]   =  0;
    state.sbbBits0[stateId]       =  0;
    state.sbbBits1[stateId]       =  0;
  }

  template<bool rrgEnsured = false>
  static inline void checkRdCosts( const int stateId, const DQIntern::ScanPosType spt, const DQIntern::PQData& pqDataA, const DQIntern::PQData& pqDataB, DQIntern::Decisions& decisions, int idxAZ, int idxB, const DQIntern::StateMem& state )
  {
    const int32_t* goRiceTab = DQIntern::g_goRiceBits[state.m_goRicePar[stateId]];
    int64_t         rdCostA = state.rdCost[stateId] + pqDataA.deltaDist;
    int64_t         rdCostB = state.rdCost[stateId] + pqDataB.deltaDist;
    int64_t         rdCostZ = state.rdCost[stateId];

    if( rrgEnsured || state.remRegBins[stateId] >= 4 )
    {
      const CoeffFracBits& cffBits = state.m_gtxFracBitsArray[state.ctx.cff[stateId]];
      const BinFracBits    sigBits = state.m_sigFracBitsArray[stateId][state.ctx.sig[stateId]];

      if( pqDataA.absLevel < 4 )
        rdCostA += cffBits.bits[pqDataA.absLevel];
      else
      {
        const unsigned value = ( pqDataA.absLevel - 4 ) >> 1;
        rdCostA += cffBits.bits[pqDataA.absLevel - ( value << 1 )] + goRiceTab[std::min<unsigned>( value, RICEMAX - 1 )];
      }

      if( pqDataB.absLevel < 4 )
        rdCostB += cffBits.bits[pqDataB.absLevel];
      else
      {
        const unsigned value = ( pqDataB.absLevel - 4 ) >> 1;
        rdCostB += cffBits.bits[pqDataB.absLevel - ( value << 1 )] + goRiceTab[std::min<unsigned>( value, RICEMAX - 1 )];
      }

      if( spt == SCAN_ISCSBB )
      {
        rdCostA += sigBits.intBits[1];
        rdCostB += sigBits.intBits[1];
        rdCostZ += sigBits.intBits[0];
      }
      else if( spt == SCAN_SOCSBB )
      {
        rdCostA += state.sbbBits1[stateId] + sigBits.intBits[1];
        rdCostB += state.sbbBits1[stateId] + sigBits.intBits[1];
        rdCostZ += state.sbbBits1[stateId] + sigBits.intBits[0];
      }
      else if( state.numSig[stateId] )
      {
        rdCostA += sigBits.intBits[1];
        rdCostB += sigBits.intBits[1];
        rdCostZ += sigBits.intBits[0];
      }
      else
      {
        rdCostZ = rdCostInit;
      }
    }
    else
    {
      rdCostA += ( 1 << SCALE_BITS ) + goRiceTab[pqDataA.absLevel <= state.m_goRiceZero[stateId] ? pqDataA.absLevel - 1 : std::min<int>( pqDataA.absLevel, RICEMAX - 1 )];
      rdCostB += ( 1 << SCALE_BITS ) + goRiceTab[pqDataB.absLevel <= state.m_goRiceZero[stateId] ? pqDataB.absLevel - 1 : std::min<int>( pqDataB.absLevel, RICEMAX - 1 )];
      rdCostZ += goRiceTab[state.m_goRiceZero[stateId]];
    }

    if( rdCostA < rdCostZ && rdCostA < decisions.rdCost[idxAZ] )
    {
      decisions.rdCost[idxAZ] = rdCostA;
      decisions.absLevel[idxAZ] = pqDataA.absLevel;
      decisions.prevId[idxAZ] = stateId;
    }
    else if( rdCostZ < decisions.rdCost[idxAZ] )
    {
      decisions.rdCost[idxAZ] = rdCostZ;
      decisions.absLevel[idxAZ] = 0;
      decisions.prevId[idxAZ] = stateId;
    }

    if( rdCostB < decisions.rdCost[idxB] )
    {
      decisions.rdCost[idxB] = rdCostB;
      decisions.absLevel[idxB] = pqDataB.absLevel;
      decisions.prevId[idxB] = stateId;
    }
  }

  void checkAllRdCosts( const DQIntern::ScanPosType spt, const DQIntern::PQData* pqData, DQIntern::Decisions& decisions, const DQIntern::StateMem& state )
  {
    checkRdCosts<true>( 0, spt, pqData[0], pqData[2], decisions, 0, 2, state );
    checkRdCosts<true>( 1, spt, pqData[0], pqData[2], decisions, 2, 0, state );
    checkRdCosts<true>( 2, spt, pqData[3], pqData[1], decisions, 1, 3, state );
    checkRdCosts<true>( 3, spt, pqData[3], pqData[1], decisions, 3, 1, state );
  }

  template<bool rrgEnsured = false>
  static void checkRdCostsOdd1( const int stateId, const ScanPosType spt, const int64_t deltaDist, Decisions& decisions, int idxA, int idxZ, const StateMem& state )
  {
    int64_t         rdCostA = state.rdCost[stateId] + deltaDist;
    int64_t         rdCostZ = state.rdCost[stateId];

    if( rrgEnsured || state.remRegBins[stateId] >= 4 )
    {
      const BinFracBits sigBits = state.m_sigFracBitsArray[stateId][state.ctx.sig[stateId]];

      rdCostA += state.cffBits1[state.ctx.cff[stateId]];

      if( spt == SCAN_ISCSBB )
      {
        rdCostA += sigBits.intBits[1];
        rdCostZ += sigBits.intBits[0];
      }
      else if( spt == SCAN_SOCSBB )
      {
        rdCostA += state.sbbBits1[stateId] + sigBits.intBits[1];
        rdCostZ += state.sbbBits1[stateId] + sigBits.intBits[0];
      }
      else if( state.numSig[stateId] )
      {
        rdCostA += sigBits.intBits[1];
        rdCostZ += sigBits.intBits[0];
      }
      else
      {
        rdCostZ = rdCostInit;
      }
    }
    else
    {
      const int32_t* goRiceTab = g_goRiceBits[state.m_goRicePar[stateId]];

      rdCostA += ( 1 << SCALE_BITS ) + goRiceTab[0];
      rdCostZ += goRiceTab[state.m_goRiceZero[stateId]];
    }

    if( rdCostA < decisions.rdCost[idxA] )
    {
      decisions.rdCost[idxA] = rdCostA;
      decisions.absLevel[idxA] = 1;
      decisions.prevId[idxA] = stateId;
    }

    if( rdCostZ < decisions.rdCost[idxZ] )
    {
      decisions.rdCost[idxZ] = rdCostZ;
      decisions.absLevel[idxZ] = 0;
      decisions.prevId[idxZ] = stateId;
    }
  }

  static void checkAllRdCostsOdd1( const DQIntern::ScanPosType spt, const int64_t pq_a_dist, const int64_t pq_b_dist, DQIntern::Decisions& decisions, const DQIntern::StateMem& state )
  {
    checkRdCostsOdd1<true>( 0, spt, pq_b_dist, decisions, 2, 0, state );
    checkRdCostsOdd1<true>( 1, spt, pq_b_dist, decisions, 0, 2, state );
    checkRdCostsOdd1<true>( 2, spt, pq_a_dist, decisions, 3, 1, state );
    checkRdCostsOdd1<true>( 3, spt, pq_a_dist, decisions, 1, 3, state );
  }

  static inline void checkRdCostStart( int32_t lastOffset, const PQData& pqData, Decisions& decisions, int idx, const StateMem& state )
  {
    const CoeffFracBits& cffBits = state.m_gtxFracBitsArray[0];

    int64_t rdCost = pqData.deltaDist + lastOffset;
    if( pqData.absLevel < 4 )
    {
      rdCost += cffBits.bits[pqData.absLevel];
    }
    else
    {
      const unsigned value = ( pqData.absLevel - 4 ) >> 1;
      rdCost += cffBits.bits[pqData.absLevel - ( value << 1 )] + g_goRiceBits[0][value < RICEMAX ? value : RICEMAX - 1];
    }

    if( rdCost < decisions.rdCost[idx] )
    {
      decisions.rdCost[idx]   = rdCost;
      decisions.absLevel[idx] = pqData.absLevel;
      decisions.prevId[idx]   = -1;
    }
  }

  static inline void checkRdCostSkipSbb( const int stateId, Decisions& decisions, int idx, const StateMem& state )
  {
    int64_t rdCost = state.rdCost[stateId] + state.sbbBits0[stateId];
    if( rdCost < decisions.rdCost[idx] )
    {
      decisions.rdCost[idx]   = rdCost;
      decisions.absLevel[idx] = 0;
      decisions.prevId[idx]   = 4 | stateId;
    }
  }

  static inline void checkRdCostSkipSbbZeroOut( const int stateId, Decisions& decisions, int idx, const StateMem& state )
  {
    int64_t rdCost          = state.rdCost[stateId] + state.sbbBits0[stateId];
    decisions.rdCost[idx]   = rdCost;
    decisions.absLevel[idx] = 0;
    decisions.prevId[idx]   = 4 | stateId;
  }

  static inline void setRiceParam( const int stateId, const ScanInfo& scanInfo, StateMem& state, bool ge4 )
  {
    if( state.remRegBins[stateId] < 4 || ge4 )
    {
      TCoeff  sumAbs = state.sum1st[scanInfo.insidePos][stateId];
      int sumSub     = state.remRegBins[stateId] < 4 ? 0 : 4 * 5;
      int sumAll     = std::max( std::min( 31, ( int ) sumAbs - sumSub ), 0 );
      state.m_goRicePar[stateId]
                     = g_auiGoRiceParsCoeff[sumAll];

      if( state.remRegBins[stateId] < 4 )
      {
        state.m_goRiceZero[stateId] = g_auiGoRicePosCoeff0( stateId, state.m_goRicePar[stateId] );
      }
    }
  }

  static void update1State( int stateId, const DQIntern::ScanInfo& scanInfo, const DQIntern::Decisions& decisions, DQIntern::StateMem& curr, DQIntern::StateMem& prev )
  {
    curr.rdCost[stateId] = decisions.rdCost[stateId];
    if( decisions.prevId[stateId] > -2 )
    {
      if( decisions.prevId[stateId] >= 0 )
      {
        const int prevId          = decisions.prevId[stateId];
        curr.numSig[stateId]      = prev.numSig[prevId] + !!decisions.absLevel[stateId];
        curr.refSbbCtxId[stateId] = prev.refSbbCtxId[prevId];
        curr.sbbBits0[stateId]    = prev.sbbBits0[prevId];
        curr.sbbBits1[stateId]    = prev.sbbBits1[prevId];
        curr.remRegBins[stateId]  = prev.remRegBins[prevId] - 1;

        if( curr.remRegBins[stateId] >= 4 )
        {
          curr.remRegBins[stateId] -= ( decisions.absLevel[stateId] < 2 ? decisions.absLevel[stateId] : 3 );
        }

        for( int i = 0; i < 16; i++ )
        {
          curr.tplAcc[i][stateId] = prev.tplAcc[i][prevId];
          curr.sum1st[i][stateId] = prev.sum1st[i][prevId];
          curr.absVal[i][stateId] = prev.absVal[i][prevId];
        }
      }
      else
      {
        curr.numSig[stateId]      =  1;
        curr.refSbbCtxId[stateId] = -1;
        curr.remRegBins[stateId]  = prev.initRemRegBins;
        curr.remRegBins[stateId] -= ( decisions.absLevel[stateId] < 2 ? decisions.absLevel[stateId] : 3 );

        for( int i = 0; i < 16; i++ )
        {
          curr.tplAcc[i][stateId] = 0;
          curr.sum1st[i][stateId] = 0;
          curr.absVal[i][stateId] = 0;
        }
      }

      if( decisions.absLevel[stateId] )
      {
        curr.absVal[scanInfo.insidePos][stateId] = ( uint8_t ) std::min<TCoeff>( 126 + ( decisions.absLevel[stateId] & 1 ), decisions.absLevel[stateId] );

        if( scanInfo.currNbInfoSbb.numInv )
        {
          int min4_or_5 = std::min<TCoeff>( 4 + ( decisions.absLevel[stateId] & 1 ), decisions.absLevel[stateId] );

          auto adds8 = []( uint8_t a, uint8_t b )
          {
            uint8_t c = a + b;
            if( c < a ) c = -1;
            return c;
          };

          auto update_deps = [&]( int k )
          {
            curr.tplAcc[scanInfo.currNbInfoSbb.invInPos[k]][stateId] += 32 + min4_or_5;
            curr.sum1st[scanInfo.currNbInfoSbb.invInPos[k]][stateId] = adds8( curr.sum1st[scanInfo.currNbInfoSbb.invInPos[k]][stateId], decisions.absLevel[stateId] );
          };

          switch( scanInfo.currNbInfoSbb.numInv )
          {
          default:
          case 5:
            update_deps( 4 );
          case 4:
            update_deps( 3 );
          case 3:
            update_deps( 2 );
          case 2:
            update_deps( 1 );
          case 1:
            update_deps( 0 );
          }
        }
      }

      if( curr.remRegBins[stateId] >= 4 )
      {
        TCoeff  sumAbs1 = curr.tplAcc[scanInfo.nextInsidePos][stateId] & 31;
        TCoeff  sumNum  = curr.tplAcc[scanInfo.nextInsidePos][stateId] >> 5u;
        int sumGt1 = sumAbs1 - sumNum;

        curr.ctx.sig[stateId] = scanInfo.sigCtxOffsetNext + std::min( ( sumAbs1 + 1 ) >> 1, 3 );
        curr.ctx.cff[stateId] = scanInfo.gtxCtxOffsetNext + std::min( sumGt1, 4 );
      }
      else
      {
        curr.anyRemRegBinsLt4 = true;
      }
    }
  }

  static void update1StateEOS( const int stateId, const DQIntern::ScanInfo& scanInfo, const DQIntern::Decisions& decisions, const DQIntern::StateMem& skip, DQIntern::StateMem& curr, DQIntern::StateMem& prev, DQIntern::CommonCtx& commonCtx )
  {
    curr.rdCost[stateId] = decisions.rdCost[stateId];

    if( decisions.prevId[stateId] > -2 )
    {
      if( decisions.prevId[stateId] >= 4 )
      {
        CHECK( decisions.absLevel[stateId] != 0, "cannot happen" );

        const int prevId          = decisions.prevId[stateId] - 4;
        curr.numSig    [stateId]  = 0;
        curr.remRegBins[stateId]  = skip.remRegBins[prevId];
        curr.refSbbCtxId[stateId] = prevId;

        for( int i = 0; i < 16; i++ )
        {
          curr.absVal[i][stateId] = 0;
        }
      }
      else if( decisions.prevId[stateId] >= 0 )
      {
        const int prevId          = decisions.prevId[stateId];
        curr.numSig[stateId]      = prev.numSig[prevId] + !!decisions.absLevel[stateId];
        curr.refSbbCtxId[stateId] = prev.refSbbCtxId[prevId];
        curr.remRegBins[stateId]  = prev.remRegBins[prevId] - 1;

        if( curr.remRegBins[stateId] >= 4 )
        {
          curr.remRegBins[stateId] -= ( decisions.absLevel[stateId] < 2 ? decisions.absLevel[stateId] : 3 );
        }

        for( int i = 0; i < 16; i++ )
        {
          curr.absVal[i][stateId] = prev.absVal[i][prevId];
        }
      }
      else
      {
        curr.numSig[stateId]      =  1;
        curr.refSbbCtxId[stateId] = -1;
        curr.remRegBins[stateId]  = prev.initRemRegBins;
        curr.remRegBins[stateId] -= ( decisions.absLevel[stateId] < 2 ? decisions.absLevel[stateId] : 3 );

        for( int i = 0; i < 16; i++ )
        {
          curr.absVal[i][stateId] = 0;
        }
      }

      curr.absVal[scanInfo.insidePos][stateId] = ( uint8_t ) std::min<TCoeff>( 126 + ( decisions.absLevel[stateId] & 1 ), decisions.absLevel[stateId] );

      uint8_t* levels[4];
      commonCtx.getLevelPtrs( scanInfo, levels[0], levels[1], levels[2], levels[3] );
      for( int i = 0; i < 16; i++ )
      {
        // save abs levels to commonCtx
        levels[stateId][i] = curr.absVal[i][stateId];
        // clean the SBB ctx
        curr.tplAcc[i][stateId] = 0;
        curr.sum1st[i][stateId] = 0;
        curr.absVal[i][stateId] = 0;
      }

      commonCtx.update( scanInfo, curr.refSbbCtxId[stateId], stateId, curr );

      curr.numSig[stateId] = 0;

      if( curr.remRegBins[stateId] >= 4 )
      {
        TCoeff  sumAbs1 = curr.tplAcc[scanInfo.nextInsidePos][stateId] & 31;
        TCoeff  sumNum  = curr.tplAcc[scanInfo.nextInsidePos][stateId] >> 5u;
        int sumGt1 = sumAbs1 - sumNum;

        curr.ctx.sig[stateId] = scanInfo.sigCtxOffsetNext + std::min( ( sumAbs1 + 1 ) >> 1, 3 );
        curr.ctx.cff[stateId] = scanInfo.gtxCtxOffsetNext + std::min( sumGt1, 4 );
      }
      else
      {
        curr.anyRemRegBinsLt4 = true;
      }
    }
  }

  static void updateStates( const DQIntern::ScanInfo& scanInfo, const DQIntern::Decisions& decisions, DQIntern::StateMem& curr )
  {
    DQIntern::StateMem prev = curr;
    curr.anyRemRegBinsLt4   = false;

    update1State( 0, scanInfo, decisions, curr, prev );
    update1State( 1, scanInfo, decisions, curr, prev );
    update1State( 2, scanInfo, decisions, curr, prev );
    update1State( 3, scanInfo, decisions, curr, prev );

    curr.cffBitsCtxOffset = scanInfo.gtxCtxOffsetNext;
  }

  static void updateStatesEOS( const DQIntern::ScanInfo& scanInfo, const DQIntern::Decisions& decisions, const DQIntern::StateMem& skip, DQIntern::StateMem& curr, DQIntern::CommonCtx& commonCtx )
  {
    DQIntern::StateMem prev = curr;
    curr.anyRemRegBinsLt4   = false;

    update1StateEOS( 0, scanInfo, decisions, skip, curr, prev, commonCtx );
    update1StateEOS( 1, scanInfo, decisions, skip, curr, prev, commonCtx );
    update1StateEOS( 2, scanInfo, decisions, skip, curr, prev, commonCtx );
    update1StateEOS( 3, scanInfo, decisions, skip, curr, prev, commonCtx );

    curr.cffBitsCtxOffset = scanInfo.gtxCtxOffsetNext;
  }
}; // namespace DQIntern

static const DQIntern::Decisions startDec[2] =
{
  DQIntern::Decisions
  {
    { DQIntern::rdCostInit >> 2, DQIntern::rdCostInit >> 2, DQIntern::rdCostInit >> 2, DQIntern::rdCostInit >> 2 },
    { -1, -1, -1, -1 },
    { -2, -2, -2, -2 },
  },
  DQIntern::Decisions
  {
    { DQIntern::rdCostInit >> 2, DQIntern::rdCostInit >> 2, DQIntern::rdCostInit >> 2, DQIntern::rdCostInit >> 2 },
    { 0, 0, 0, 0 },
    { 4, 5, 6, 7 },
  }
};

void DepQuant::xQuantDQ( TransformUnit& tu, const CCoeffBuf& srcCoeff, const ComponentID compID, const QpParam& cQP, const double lambda, const Ctx& ctx, TCoeff& absSum, bool enableScalingLists, int* quantCoeff )
{
  using namespace DQIntern;
  
  //===== reset / pre-init =====
  const TUParameters& tuPars  = *m_scansRom->getTUPars( tu.blocks[compID], compID );
  m_quant.initQuantBlock    ( tu, compID, cQP, lambda );
  TCoeffSig*    qCoeff      = tu.getCoeffs( compID ).buf;
  const TCoeff* tCoeff      = srcCoeff.buf;
  const int     numCoeff    = tu.blocks[compID].area();
  ::memset( qCoeff, 0x00, numCoeff * sizeof( TCoeffSig ) );
  absSum                    = 0;

  const CompArea& area      = tu.blocks[ compID ];
  const uint32_t  width     = area.width;
  const uint32_t  height    = area.height;
  const uint32_t  lfnstIdx  = tu.cu->lfnstIdx;
  //===== scaling matrix ====
  //const int         qpDQ = cQP.Qp + 1;
  //const int         qpPer = qpDQ / 6;
  //const int         qpRem = qpDQ - 6 * qpPer;

  //TCoeff thresTmp = thres;
  bool zeroOut = false;
  bool zeroOutforThres = false;
  int effWidth = tuPars.m_width, effHeight = tuPars.m_height;
  if( ( tu.mtsIdx[compID] > MTS_SKIP || ( tu.cs->sps->MTS && tu.cu->sbtInfo != 0 && tuPars.m_height <= 32 && tuPars.m_width <= 32 ) ) && compID == COMP_Y )
  {
    effHeight = ( tuPars.m_height == 32 ) ? 16 : tuPars.m_height;
    effWidth  = ( tuPars.m_width  == 32 ) ? 16 : tuPars.m_width;
    zeroOut   = ( effHeight < tuPars.m_height || effWidth < tuPars.m_width );
  }
  zeroOutforThres = zeroOut || ( 32 < tuPars.m_height || 32 < tuPars.m_width );
  //===== find first test position =====
  int firstTestPos = std::min<int>( tuPars.m_width, JVET_C0024_ZERO_OUT_TH ) * std::min<int>( tuPars.m_height, JVET_C0024_ZERO_OUT_TH ) - 1;
  if( lfnstIdx > 0 && tu.mtsIdx[compID] != MTS_SKIP && width >= 4 && height >= 4 )
  {
    firstTestPos = ( ( width == 4 && height == 4 ) || ( width == 8 && height == 8 ) )  ? 7 : 15 ;
  }

  const TCoeff defaultQuantisationCoefficient = (TCoeff)m_quant.getQScale();
  const TCoeff thres = m_quant.getLastThreshold();
  const int zeroOutWidth  = ( tuPars.m_width  == 32 && zeroOut ) ? 16 : 32;
  const int zeroOutHeight = ( tuPars.m_height == 32 && zeroOut ) ? 16 : 32;

  if( enableScalingLists )
  {
    for( ; firstTestPos >= 0; firstTestPos-- )
    {
      if( zeroOutforThres && ( tuPars.m_scanId2BlkPos[firstTestPos].x >= zeroOutWidth || tuPars.m_scanId2BlkPos[firstTestPos].y >= zeroOutHeight ) ) continue;

      const TCoeff thresTmp = TCoeff( thres / ( 4 * quantCoeff[tuPars.m_scanId2BlkPos[firstTestPos].idx] ) );

      if( abs( tCoeff[tuPars.m_scanId2BlkPos[firstTestPos].idx] ) > thresTmp ) break;
    }
  }
  else
  {
    const TCoeff defaultTh = TCoeff( thres / ( defaultQuantisationCoefficient << 2 ) );

    m_findFirstPos( firstTestPos, tCoeff, tuPars, defaultTh, zeroOutforThres, zeroOutWidth, zeroOutHeight );
  }

  if( firstTestPos < 0 )
  {
    tu.lastPos[compID] = -1;
    return;
  }

  //===== real init =====
  RateEstimator::initCtx( tuPars, tu, compID, ctx.getFracBitsAcess() );
  m_commonCtx.reset( tuPars, *this );
  for( int k = 0; k < 4; k++ )
  {
    DQIntern::initStates( k, m_state_curr );
    DQIntern::initStates( k, m_state_skip );
    m_state_curr.m_sigFracBitsArray[k] = RateEstimator::sigFlagBits(k);
  }

  m_state_curr.m_gtxFracBitsArray = RateEstimator::gtxFracBits();
  //memset( m_state_curr.tplAcc, 0, sizeof( m_state_curr.tplAcc ) ); // will be set in updateStates{,EOS} before first access
  memset( m_state_curr.sum1st, 0, sizeof( m_state_curr.sum1st ) );   // will be accessed in setRiceParam before updateState{,EOS}
  //memset( m_state_curr.absVal, 0, sizeof( m_state_curr.absVal ) ); // will be set in updateStates{,EOS} before first access

  const int numCtx = isLuma( compID ) ? 21 : 11;
  const CoeffFracBits* const cffBits = gtxFracBits();
  for( int i = 0; i < numCtx; i++ )
  {
    m_state_curr.cffBits1[i] = cffBits[i].bits[1];
  }

  int effectWidth  = std::min( 32, effWidth );
  int effectHeight = std::min( 32, effHeight );
  m_state_curr.initRemRegBins   = ( effectWidth * effectHeight * MAX_TU_LEVEL_CTX_CODED_BIN_CONSTRAINT ) / 16;
  m_state_curr.anyRemRegBinsLt4 = true; // for the first coeff use scalar impl., because it check against the init state, which
                                        // prohibits some paths

  //===== populate trellis =====
  for( int scanIdx = firstTestPos; scanIdx >= 0; scanIdx-- )
  {
    const ScanInfo& scanInfo = tuPars.m_scanInfo[ scanIdx ];
    if( enableScalingLists )
    {
      m_quant.initQuantBlock( tu, compID, cQP, lambda, quantCoeff[scanInfo.rasterPos] );
      xDecideAndUpdate( abs( tCoeff[scanInfo.rasterPos] ), scanInfo, zeroOut && ( scanInfo.posX >= effWidth || scanInfo.posY >= effHeight ), quantCoeff[scanInfo.rasterPos] );
    }
    else
      xDecideAndUpdate( abs( tCoeff[scanInfo.rasterPos] ), scanInfo, zeroOut && ( scanInfo.posX >= effWidth || scanInfo.posY >= effHeight ), defaultQuantisationCoefficient );
  }

  //===== find best path =====
  int       prevId      = -1;
  int64_t   minPathCost =  0;
  for( int8_t stateId = 0; stateId < 4; stateId++ )
  {
    int64_t pathCost = m_trellis[0][0].rdCost[stateId];
    if( pathCost < minPathCost )
    {
      prevId      = stateId;
      minPathCost = pathCost;
    }
  }

  //===== backward scanning =====
  int scanIdx = 0;
  for( ; prevId >= 0; scanIdx++ )
  {
    TCoeffSig absLevel = m_trellis[scanIdx][prevId >> 2].absLevel[prevId & 3];
    int32_t blkpos     = tuPars.m_scanId2BlkPos[scanIdx].idx;
    qCoeff[ blkpos ]   = TCoeffSig( tCoeff[blkpos] < 0 ? -absLevel : absLevel );
    absSum            += absLevel;
    prevId             = m_trellis[scanIdx][prevId >> 2].prevId[prevId & 3];
  }

  tu.lastPos[compID] = scanIdx - 1;
}

void DepQuant::xDecide( const DQIntern::ScanInfo& scanInfo, const TCoeff absCoeff, const int lastOffset, DQIntern::Decisions& decisions, bool zeroOut, int quantCoeff )
{
  using namespace DQIntern;

  ::memcpy( &decisions, startDec, sizeof( Decisions ) );

  StateMem& skip = m_state_skip;

  if( zeroOut )
  {
    if( scanInfo.spt == SCAN_EOCSBB )
    {
      checkRdCostSkipSbbZeroOut( 0, decisions, 0, skip );
      checkRdCostSkipSbbZeroOut( 1, decisions, 1, skip );
      checkRdCostSkipSbbZeroOut( 2, decisions, 2, skip );
      checkRdCostSkipSbbZeroOut( 3, decisions, 3, skip );
    }
    return;
  }

  StateMem& prev = m_state_curr;

  /// start inline prequant
  int64_t scaledOrg = int64_t( absCoeff ) * quantCoeff;
  TCoeff  qIdx      = TCoeff( ( scaledOrg + m_quant.m_QAdd ) >> m_quant.m_QShift );

  if( qIdx < 0 )
  {
    int64_t scaledAdd = m_quant.m_DistStepAdd - scaledOrg * m_quant.m_DistOrgFact;
    int64_t pq_a_dist = ( ( scaledAdd + 0 * m_quant.m_DistStepAdd ) * 1 + m_quant.m_DistAdd ) >> m_quant.m_DistShift;
    int64_t pq_b_dist = ( ( scaledAdd + 1 * m_quant.m_DistStepAdd ) * 2 + m_quant.m_DistAdd ) >> m_quant.m_DistShift;
    /// stop inline prequant

    if( prev.anyRemRegBinsLt4 )
    {
      setRiceParam( 0, scanInfo, prev, false );
      checkRdCostsOdd1( 0, scanInfo.spt, pq_b_dist, decisions, 2, 0, prev );

      setRiceParam( 1, scanInfo, prev, false );
      checkRdCostsOdd1( 1, scanInfo.spt, pq_b_dist, decisions, 0, 2, prev );

      setRiceParam( 2, scanInfo, prev, false );
      checkRdCostsOdd1( 2, scanInfo.spt, pq_a_dist, decisions, 3, 1, prev );

      setRiceParam( 3, scanInfo, prev, false );
      checkRdCostsOdd1( 3, scanInfo.spt, pq_a_dist, decisions, 1, 3, prev );
    }
    else
    {
      // has to be called as a first check, assumes no decision has been made yet
      m_checkAllRdCostsOdd1( scanInfo.spt, pq_a_dist, pq_b_dist, decisions, prev );
    }

    checkRdCostStart( lastOffset, PQData{ 1, pq_b_dist }, decisions, 2, prev );
  }
  else
  {
    /// start inline prequant
    qIdx = std::max<TCoeff>( 1, std::min<TCoeff>( m_quant.m_maxQIdx, qIdx ) );
    int64_t scaledAdd = qIdx * m_quant.m_DistStepAdd - scaledOrg * m_quant.m_DistOrgFact;

    PQData  pqData[4];

    PQData& pq_a = pqData[( qIdx + 0 ) & 3];
    PQData& pq_b = pqData[( qIdx + 1 ) & 3];
    PQData& pq_c = pqData[( qIdx + 2 ) & 3];
    PQData& pq_d = pqData[( qIdx + 3 ) & 3];

    pq_a.deltaDist = ( ( scaledAdd + 0 * m_quant.m_DistStepAdd ) * ( qIdx + 0 ) + m_quant.m_DistAdd ) >> m_quant.m_DistShift;
    pq_a.absLevel = ( qIdx + 1 ) >> 1;

    pq_b.deltaDist = ( ( scaledAdd + 1 * m_quant.m_DistStepAdd ) * ( qIdx + 1 ) + m_quant.m_DistAdd ) >> m_quant.m_DistShift;
    pq_b.absLevel = ( qIdx + 2 ) >> 1;

    pq_c.deltaDist = ( ( scaledAdd + 2 * m_quant.m_DistStepAdd ) * ( qIdx + 2 ) + m_quant.m_DistAdd ) >> m_quant.m_DistShift;
    pq_c.absLevel = ( qIdx + 3 ) >> 1;

    pq_d.deltaDist = ( ( scaledAdd + 3 * m_quant.m_DistStepAdd ) * ( qIdx + 3 ) + m_quant.m_DistAdd ) >> m_quant.m_DistShift;
    pq_d.absLevel = ( qIdx + 4 ) >> 1;
    /// stop inline prequant

    bool cff02ge4 = pqData[0].absLevel >= 4/* || pqData[2].absLevel >= 4 */;
    bool cff13ge4 = /* pqData[1].absLevel >= 4 || */ pqData[3].absLevel >= 4;

    if( cff02ge4 || cff13ge4 || prev.anyRemRegBinsLt4 )
    {
      if( prev.anyRemRegBinsLt4 || cff02ge4 )
      {
        setRiceParam( 0, scanInfo, prev, cff02ge4 );
        setRiceParam( 1, scanInfo, prev, cff02ge4 );
      }

      if( prev.anyRemRegBinsLt4 || cff13ge4 )
      {
        setRiceParam( 2, scanInfo, prev, cff13ge4 );
        setRiceParam( 3, scanInfo, prev, cff13ge4 );
      }

      checkRdCosts( 0, scanInfo.spt, pqData[0], pqData[2], decisions, 0, 2, prev );
      checkRdCosts( 1, scanInfo.spt, pqData[0], pqData[2], decisions, 2, 0, prev );
      checkRdCosts( 2, scanInfo.spt, pqData[3], pqData[1], decisions, 1, 3, prev );
      checkRdCosts( 3, scanInfo.spt, pqData[3], pqData[1], decisions, 3, 1, prev );
    }
    else
    {
      // has to be called as a first check, assumes no decision has been made yet
      m_checkAllRdCosts( scanInfo.spt, pqData, decisions, prev );
    }

    checkRdCostStart( lastOffset, pqData[0], decisions, 0, prev );
    checkRdCostStart( lastOffset, pqData[2], decisions, 2, prev );
  }

  if( scanInfo.spt == SCAN_EOCSBB )
  {
    checkRdCostSkipSbb( 0, decisions, 0, skip );
    checkRdCostSkipSbb( 1, decisions, 1, skip );
    checkRdCostSkipSbb( 2, decisions, 2, skip );
    checkRdCostSkipSbb( 3, decisions, 3, skip );
  }
}

void DepQuant::xDecideAndUpdate( const TCoeff absCoeff, const DQIntern::ScanInfo& scanInfo, bool zeroOut, int quantCoeff )
{
  using namespace DQIntern;

  Decisions* decisions = &m_trellis[scanInfo.scanIdx][0];

  xDecide( scanInfo, absCoeff, lastOffset( scanInfo.scanIdx ), *decisions, zeroOut, quantCoeff );

  if( scanInfo.scanIdx )
  {
    if( scanInfo.spt == SCAN_SOCSBB )
    {
      memcpy( &m_state_skip, &m_state_curr, DQIntern::StateMemSkipCpySize );
    }

    if( scanInfo.insidePos == 0 )
    {
      m_commonCtx.swap();
      m_updateStatesEOS( scanInfo, *decisions, m_state_skip, m_state_curr, m_commonCtx );
      ::memcpy( decisions + 1, decisions, sizeof( Decisions ) );
    }
    else if( !zeroOut )
    {
      m_updateStates( scanInfo, *decisions, m_state_curr );
    }
  }
}

void DepQuant::xDequantDQ( const TransformUnit& tu,  CoeffBuf& recCoeff, const ComponentID compID, const QpParam& cQP, bool enableScalingLists, int* piDequantCoef )
{
  m_quant.dequantBlock( tu, compID, cQP, recCoeff, enableScalingLists, piDequantCoef );
}

DepQuant::DepQuant( const Quant* other, bool enc, bool useScalingLists, bool enableOpt ) : QuantRDOQ2( other, useScalingLists ), RateEstimator(), m_commonCtx()
{
  const DepQuant* dq = dynamic_cast<const DepQuant*>( other );
  CHECK( other && !dq, "The DepQuant cast must be successfull!" );

  if( !dq )
  {
    m_scansRom = std::make_shared<DQIntern::Rom>();
    m_scansRom->init();
  }
  else
  {
    m_scansRom = dq->m_scansRom;
  }

  for( int t = 0; t < ( MAX_TB_SIZEY * MAX_TB_SIZEY ); t++ )
  {
    memcpy( m_trellis[t], startDec, sizeof( startDec ) );
  }

  m_checkAllRdCosts     = DQIntern::checkAllRdCosts;
  m_checkAllRdCostsOdd1 = DQIntern::checkAllRdCostsOdd1;
  m_updateStatesEOS     = DQIntern::updateStatesEOS;
  m_updateStates        = DQIntern::updateStates;
  m_findFirstPos        = DQIntern::findFirstPos;

  if( enableOpt )
  {
#if defined( TARGET_SIMD_X86 ) && ENABLE_SIMD_OPT_QUANT
    initDepQuantX86();
#endif
#if defined( TARGET_SIMD_ARM ) && ENABLE_SIMD_OPT_QUANT
    initDepQuantARM();
#endif
  }
}

DepQuant::~DepQuant()
{
}

void DepQuant::quant( TransformUnit& tu, const ComponentID compID, const CCoeffBuf& pSrc, TCoeff& uiAbsSum, const QpParam& cQP, const Ctx& ctx )
{
  if( tu.cs->picture->useSelectiveRdoq && !xNeedRDOQ( tu, compID, pSrc, cQP ) )
  {
    tu.lastPos[compID] = -1;
    uiAbsSum           =  0;
  }
  else if( tu.cs->slice->depQuantEnabled && tu.mtsIdx[compID] != MTS_SKIP )
  {
    //===== scaling matrix ====
    const int         qpDQ            = cQP.Qp(tu.mtsIdx[compID]==MTS_SKIP) + 1;
    const int         qpPer           = qpDQ / 6;
    const int         qpRem           = qpDQ - 6 * qpPer;
    const CompArea    &rect           = tu.blocks[compID];
    const int         width           = rect.width;
    const int         height          = rect.height;
    uint32_t          scalingListType = getScalingListType(tu.cu->predMode, compID);
    CHECK(scalingListType >= SCALING_LIST_NUM, "Invalid scaling list");
    const uint32_t    log2TrWidth     = Log2(width);
    const uint32_t    log2TrHeight    = Log2(height);
    const bool isLfnstApplied         = tu.cu->lfnstIdx > 0 && (CU::isSepTree(*tu.cu) ? true : isLuma(compID));
    const bool enableScalingLists     = getUseScalingList(width, height, (tu.mtsIdx[compID] == MTS_SKIP), isLfnstApplied);
    xQuantDQ( tu, pSrc, compID, cQP, Quant::m_dLambda, ctx, uiAbsSum, enableScalingLists, Quant::getQuantCoeff(scalingListType, qpRem, log2TrWidth, log2TrHeight) );
  }
  else
  {
    QuantRDOQ2::quant( tu, compID, pSrc, uiAbsSum, cQP, ctx );
  }
}

void DepQuant::dequant( const TransformUnit& tu, CoeffBuf& dstCoeff, const ComponentID compID, const QpParam& cQP )
{
  if( tu.cs->slice->depQuantEnabled && (tu.mtsIdx[compID] != MTS_SKIP) )
  {
    const int         qpDQ            = cQP.Qp(tu.mtsIdx[compID]==MTS_SKIP) + 1;
    const int         qpPer           = qpDQ / 6;
    const int         qpRem           = qpDQ - 6 * qpPer;
    const CompArea    &rect           = tu.blocks[compID];
    const int         width           = rect.width;
    const int         height          = rect.height;
    uint32_t          scalingListType = getScalingListType(tu.cu->predMode, compID);
    CHECK(scalingListType >= SCALING_LIST_NUM, "Invalid scaling list");
    const uint32_t    log2TrWidth    = Log2(width);
    const uint32_t    log2TrHeight   = Log2(height);
    const bool isLfnstApplied        = tu.cu->lfnstIdx > 0 && (CU::isSepTree(*tu.cu) ? true : isLuma(compID));
    const bool enableScalingLists    = getUseScalingList(width, height, (tu.mtsIdx[compID] == MTS_SKIP), isLfnstApplied);
    xDequantDQ( tu, dstCoeff, compID, cQP, enableScalingLists, Quant::getDequantCoeff(scalingListType, qpRem, log2TrWidth, log2TrHeight) );
  }
  else
  {
    QuantRDOQ::dequant( tu, dstCoeff, compID, cQP );
  }
}

void DepQuant::init( int rdoq, bool useRDOQTS, int thrVal )
{
  QuantRDOQ2::init( rdoq, useRDOQTS, thrVal );
  m_quant.init( thrVal );
}

} // namespace vvenc

//! \}


Coverage Report

Created: 2026-09-13 06:34