/work/vvenc/source/Lib/EncoderLib/InterSearch.cpp

Source
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/** \file     EncSearch.cpp
 *  \brief    encoder inter search class
 */

#include "InterSearch.h"
#include "EncModeCtrl.h"
#include "EncLib.h"
#include "CommonLib/CommonDef.h"
#include "CommonLib/Rom.h"
#include "CommonLib/MotionInfo.h"
#include "CommonLib/Picture.h"
#include "CommonLib/UnitTools.h"
#include "CommonLib/dtrace_next.h"
#include "CommonLib/dtrace_buffer.h"
#include "CommonLib/TimeProfiler.h"

#include <math.h>

 //! \ingroup EncoderLib
 //! \{

namespace vvenc {

static const Mv s_acMvRefineH[9] =
{
  Mv(  0,  0 ), // 0
  Mv(  0, -1 ), // 1
  Mv(  0,  1 ), // 2
  Mv( -1,  0 ), // 3
  Mv(  1,  0 ), // 4
  Mv( -1, -1 ), // 5
  Mv(  1, -1 ), // 6
  Mv( -1,  1 ), // 7
  Mv(  1,  1 )  // 8
};

static const Mv s_acMvRefineQ[9] =
{
  Mv(  0,  0 ), // 0
  Mv(  0, -1 ), // 1
  Mv(  0,  1 ), // 2
  Mv( -1, -1 ), // 5
  Mv(  1, -1 ), // 6
  Mv( -1,  0 ), // 3
  Mv(  1,  0 ), // 4
  Mv( -1,  1 ), // 7
  Mv(  1,  1 )  // 8
};

static const bool s_skipQpelPosition[ 42 ][ 9 ] =
{
  { false, true,  true,  true,  true,  true,  true,  true,  true  },
  { true,  true,  true,  true,  true,  false, true,  true,  true  },
  { true,  true,  true,  true,  true,  true,  false, true,  true  },
  { true,  false, true,  true,  true,  true,  true,  true,  true  },
  { true,  false, true,  false, true,  false, true,  true,  true  },
  { true,  false, true,  true,  false, true,  false, true,  true  },
  { true,  true,  false, true,  true,  true,  true,  true,  true  },
  { true,  true,  false, true,  true,  false, true,  false, true  },
  { true,  true,  false, true,  true,  true,  false, true,  false },
  { true,  true,  false, true,  true,  true,  true,  false, false },
  { true,  true,  true,  true,  true,  false, true,  true,  true  },
  { true,  true,  false, true,  true,  false, true,  false, true  },
  { true,  true,  true,  true,  true,  true,  false, true,  true  },
  { true,  true,  false, true,  true,  true,  false, true,  false },
  { true,  false, true,  false, false, true,  true,  true,  true  },
  { true,  true,  true,  true,  true,  false, true,  true,  true  },
  { true,  false, true,  false, true,  false, true,  true,  true  },
  { true,  true,  true,  true,  true,  true,  false, true,  true  },
  { true,  false, true,  true,  false, true,  false, true,  true  },
  { true,  true,  true,  true,  false, true,  false, true,  false },
  { true,  false, true,  true,  true,  true,  true,  true,  true  },
  { true,  false, true,  true,  false, true,  false, true,  true  },
  { true,  true,  false, true,  true,  true,  true,  true,  true  },
  { true,  true,  false, true,  true,  true,  false, true,  false },
  { true,  true,  true,  false, true,  false, true,  false, true  },
  { true,  false, true,  true,  true,  true,  true,  true,  true  },
  { true,  false, true,  false, true,  false, true,  true,  true  },
  { true,  true,  false, true,  true,  true,  true,  true,  true  },
  { true,  true,  false, true,  true,  false, true,  false, true  },
  { true,  true,  true,  true,  true,  true,  false, true,  true  },
  { true,  true,  false, true,  true,  true,  true,  true,  true  },
  { true,  true,  false, true,  true,  true,  false, true,  false },
  { true,  true,  true,  true,  true,  false, true,  true,  true  },
  { true,  true,  false, true,  true,  true,  true,  true,  true  },
  { true,  true,  false, true,  true,  false, true,  false, true  },
  { true,  true,  true,  true,  true,  true,  false, true,  true  },
  { true,  false, true,  true,  true,  true,  true,  true,  true  },
  { true,  false, true,  true,  false, true,  false, true,  true  },
  { true,  true,  true,  true,  true,  false, true,  true,  true  },
  { true,  false, true,  true,  true,  true,  true,  true,  true  },
  { true,  false, true,  false, true,  false, true,  true,  true  },
  { false, false, false, false, false, false, false, false, false },
};

//   1,0    3,0    0,1    1,1    2,1    3,1    1,2    3,2    0,3    1,3    2,3    3,3    H1,0   H3,0
static const bool s_doInterpQ[ 42 ][ 14 ] =
{
  { false, false, false, false, false, false, false, false, false, false, false, false, false, false },
  { false, false, false, false, false, false, false, false, true,  false, false, false, false, true  },
  { false, false, true,  false, false, false, false, false, false, false, false, false, true,  false },
  { false, true,  false, false, false, false, false, false, false, false, false, false, false, false },
  { false, true,  false, false, false, false, false, false, true,  false, false, true,  false, true  },
  { false, true,  true,  false, false, true,  false, false, false, false, false, false, true,  false },
  { true,  false, false, false, false, false, false, false, false, false, false, false, false, false },
  { true,  false, false, false, false, false, false, false, true,  true,  false, false, false, true  },
  { true,  false, true,  true,  false, false, false, false, false, false, false, false, true,  false },
  { false, true,  false, false, false, true,  false, false, false, false, false, true,  true,  true  },
  { false, false, false, false, false, false, false, false, false, false, true,  false, false, true  },
  { false, true,  false, false, false, false, false, false, false, false, true,  true,  false, true  },
  { false, false, false, false, true,  false, false, false, false, false, false, false, true,  false },
  { false, true,  false, false, true,  true,  false, false, false, false, false, false, true,  false },
  { true,  false, false, true,  false, false, false, false, false, true,  false, false, true,  true  },
  { false, false, false, false, false, false, false, false, false, false, true,  false, false, true  },
  { true,  false, false, false, false, false, false, false, false, true,  true,  false, false, true  },
  { false, false, false, false, true,  false, false, false, false, false, false, false, true,  false },
  { true,  false, false, true,  true,  false, false, false, false, false, false, false, true,  false },
  { false, false, false, false, false, false, false, false, true,  true,  false, true,  false, true  },
  { false, false, false, false, false, false, false, true,  false, false, false, false, false, false },
  { false, false, false, false, false, false, false, true,  true,  false, false, true,  false, true  },
  { false, false, false, false, false, false, true,  false, false, false, false, false, false, false },
  { false, false, false, false, false, false, true,  false, true,  true,  false, false, false, true  },
  { false, false, true,  true,  false, true,  false, false, false, false, false, false, true,  false },
  { false, false, false, false, false, false, false, true,  false, false, false, false, false, false },
  { false, false, true,  false, false, true,  false, true,  false, false, false, false, true,  false },
  { false, false, false, false, false, false, true,  false, false, false, false, false, false, false },
  { false, false, true,  true,  false, false, true,  false, false, false, false, false, true,  false },
  { false, false, false, false, false, false, false, false, false, false, true,  false, false, true  },
  { false, false, false, false, false, false, false, true,  false, false, false, false, false, false },
  { false, false, false, false, false, false, false, true,  false, false, true,  true,  false, true  },
  { false, false, false, false, true,  false, false, false, false, false, false, false, true,  false },
  { false, false, false, false, false, false, false, true,  false, false, false, false, false, false },
  { false, false, false, false, true,  true,  false, true,  false, false, false, false, true,  false },
  { false, false, false, false, false, false, false, false, false, false, true,  false, false, true  },
  { false, false, false, false, false, false, true,  false, false, false, false, false, false, false },
  { false, false, false, false, false, false, true,  false, false, true,  true,  false, false, true  },
  { false, false, false, false, true,  false, false, false, false, false, false, false, true,  false },
  { false, false, false, false, false, false, true,  false, false, false, false, false, false, false },
  { false, false, false, true,  true,  false, true,  false, false, false, false, false, true,  false },
  { true,  true,  true,  true,  true,  true,  true,  true,  true,  true,  true,  true,  true,  true  },
};

const int BlkUniMvInfoBuffer::m_uniMvListMaxSize;

InterSearch::InterSearch()
  : m_modeCtrl                    (nullptr)
  , m_defaultCachedBvs            (nullptr)
  , m_pcEncCfg                    (nullptr)
  , m_pcTrQuant                   (nullptr)
  , m_iSearchRange                (0)
  , m_bipredSearchRange           (0)
  , m_motionEstimationSearchMethod(VVENC_MESEARCH_FULL)
  , m_motionEstimationSearchMethodSCC( 0 )
  , m_CABACEstimator              (nullptr)
  , m_CtxCache                    (nullptr)
  , m_pTempPel                    (nullptr)
{
  for (int i=0; i<MAX_NUM_REF_LIST_ADAPT_SR; i++)
  {
    memset (m_aaiAdaptSR[i], 0, MAX_IDX_ADAPT_SR * sizeof (int));
  }
  for (int i=0; i<AMVP_MAX_NUM_CANDS+1; i++)
  {
    memset (m_auiMVPIdxCost[i], 0, (AMVP_MAX_NUM_CANDS+1) * sizeof (uint32_t) );
  }
}


InterSearch::~InterSearch()
{
  destroy();
}

void InterSearch::init( const VVEncCfg& encCfg, TrQuant* pTrQuant, RdCost* pRdCost, EncModeCtrl* pModeCtrl, CodingStructure **pSaveCS )
{
  InterPrediction::init( pRdCost, encCfg.m_internChromaFormat, encCfg.m_CTUSize, encCfg.m_ifpLines );
  m_numBVs                       = 0;
  m_pcEncCfg                     = &encCfg;
  m_pcTrQuant                    = pTrQuant;
  m_pcRdCost                     = pRdCost;
  m_modeCtrl                     = pModeCtrl;
  m_pSaveCS                      = pSaveCS;

  m_iSearchRange                    = encCfg.m_SearchRange;
  m_bipredSearchRange               = encCfg.m_bipredSearchRange;
  m_motionEstimationSearchMethod    = vvencMESearchMethod( encCfg.m_motionEstimationSearchMethod );
  m_motionEstimationSearchMethodSCC = encCfg.m_motionEstimationSearchMethodSCC;

  for( uint32_t iDir = 0; iDir < MAX_NUM_REF_LIST_ADAPT_SR; iDir++ )
  {
    for( uint32_t iRefIdx = 0; iRefIdx < MAX_IDX_ADAPT_SR; iRefIdx++ )
    {
      m_aaiAdaptSR[iDir][iRefIdx] = m_iSearchRange;
    }
  }

  // initialize motion cost
  for( int iNum = 0; iNum < AMVP_MAX_NUM_CANDS + 1; iNum++ )
  {
    for( int iIdx = 0; iIdx < AMVP_MAX_NUM_CANDS; iIdx++ )
    {
      if( iIdx < iNum )
      {
        m_auiMVPIdxCost[iIdx][iNum] = xGetMvpIdxBits( iIdx, iNum );
      }
      else
      {
        m_auiMVPIdxCost[iIdx][iNum] = MAX_UINT;
      }
    }
  }

  const ChromaFormat cform   = encCfg.m_internChromaFormat;
  const int          ctuSize = encCfg.m_CTUSize;
  for (uint32_t i = 0; i < NUM_REF_PIC_LIST_01; i++)
  {
    m_tmpPredStorage[i].create( UnitArea( cform, Area( 0, 0, ctuSize, ctuSize ) ) );
  }
  m_tmpStorageLCU.create( UnitArea( cform, Area( 0, 0, ctuSize, ctuSize ) ) );
  m_pTempPel = new Pel[ctuSize * ctuSize];
  m_tmpAffiStorage.create(UnitArea(cform, Area(0, 0, ctuSize, ctuSize + 2)));  // allow overread by 2 samples
  m_tmpAffiError = new Pel[ctuSize * ctuSize];
  m_tmpAffiDeri[0] = new Pel[ctuSize * ctuSize];
  m_tmpAffiDeri[1] = new Pel[ctuSize * ctuSize];

  CompArea chromaArea( COMP_Cb, cform, Area( 0, 0, encCfg.m_CTUSize, encCfg.m_CTUSize ), true );
  for( int i = 0; i < 4; i++ )
  {
    m_orgResiCb[i].create( chromaArea );
    m_orgResiCr[i].create( chromaArea );
  }
}

void InterSearch::destroy()
{
  if ( m_pTempPel )
  {
    delete [] m_pTempPel;
    m_pTempPel = nullptr;
  }

  for( int i = 0; i < NUM_REF_PIC_LIST_01; i++ )
  {
    m_tmpPredStorage[i].destroy();
  }
  m_tmpStorageLCU.destroy();
  m_tmpAffiStorage.destroy();
  if (m_tmpAffiError != NULL)
  {
    delete[] m_tmpAffiError;
    m_tmpAffiError = nullptr;
  }
  if (m_tmpAffiDeri[0] != NULL)
  {
    delete[] m_tmpAffiDeri[0];
    m_tmpAffiDeri[0] = nullptr;
  }
  if (m_tmpAffiDeri[1] != NULL)
  {
    delete[] m_tmpAffiDeri[1];
    m_tmpAffiDeri[1] = nullptr;
  }

  m_pSaveCS  = nullptr;
}

void InterSearch::setCtuEncRsrc( CABACWriter* cabacEstimator, CtxCache* ctxCache, ReuseUniMv* pReuseUniMv, BlkUniMvInfoBuffer* pBlkUniMvInfoBuffer, AffineProfList* pAffineProfList, IbcBvCand* pCachedBvs )
{
  m_CABACEstimator     = cabacEstimator;
  m_CtxCache           = ctxCache;
  m_ReuseUniMv         = pReuseUniMv;
  m_BlkUniMvInfoBuffer = pBlkUniMvInfoBuffer;
  m_AffineProfList     = pAffineProfList;
  m_defaultCachedBvs   = pCachedBvs;
}

ReuseUniMv::ReuseUniMv()
{
  const int numPos     = MAX_CU_SIZE >> MIN_CU_LOG2;
  const int maxSizeIdx = MAX_CU_SIZE_IDX-2;
  for( int wIdx = 0; wIdx < maxSizeIdx; wIdx++ )
  {
    for( int hIdx = 0; hIdx < maxSizeIdx; hIdx++ )
    {
      for( int y = 0; y < numPos; y++ )
      {
        for( int x = 0; x < numPos; x++ )
        {
          m_reusedUniMVs[ wIdx ][ hIdx ][ x ][ y ] = nullptr;
        }
      }
    }
  }
}

ReuseUniMv::~ReuseUniMv()
{
  resetReusedUniMvs();
}

void ReuseUniMv::resetReusedUniMvs()
{
  const int numPos     = MAX_CU_SIZE >> MIN_CU_LOG2;
  const int maxSizeIdx = MAX_CU_SIZE_IDX-2;
  for ( int wIdx = 0; wIdx < maxSizeIdx; wIdx++ )
  {
    for ( int hIdx = 0; hIdx < maxSizeIdx; hIdx++ )
    {
      for ( int y = 0; y < numPos; y++ )
      {
        for ( int x = 0; x < numPos; x++ )
        {
          if ( m_reusedUniMVs[ wIdx ][ hIdx ][ x ][ y ] )
          {
            delete [] m_reusedUniMVs[ wIdx ][ hIdx ][ x ][ y ];
            m_reusedUniMVs[ wIdx ][ hIdx ][ x ][ y ] = nullptr;
          }
        }
      }
    }
  }
}

void InterSearch::loadGlobalUniMvs( const Area& lumaArea, const PreCalcValues& pcv)
{
  unsigned idx1, idx2, idx3, idx4;
  getAreaIdxNew(lumaArea, pcv, idx1, idx2, idx3, idx4);
  if( m_ReuseUniMv->m_reusedUniMVs[idx1][idx2][idx3][idx4])
  {
//    DTRACE( g_trace_ctx, D_TMP, "%d unimv load %d %d %d %d \n", g_trace_ctx->getChannelCounter(D_TMP), idx3,idx4,idx1,idx2 );
    m_BlkUniMvInfoBuffer->insertUniMvCands(lumaArea, m_ReuseUniMv->m_reusedUniMVs[idx1][idx2][idx3][idx4]);
  }
}

void InterSearch::getBestSbt( CodingStructure* tempCS, CodingUnit* cu, uint8_t& histBestSbt, Distortion& curPuSse, uint8_t sbtAllowed, bool doPreAnalyzeResi, bool mtsAllowed )
{
  m_estMinDistSbt[NUMBER_SBT_MODE] = MAX_DISTORTION;
  m_skipSbtAll = false;

  if( doPreAnalyzeResi )
  {
    xCalcMinDistSbt( *tempCS, *cu, sbtAllowed );
  }

  curPuSse = getEstDistSbt( NUMBER_SBT_MODE );

  if( doPreAnalyzeResi )
  {
    if( m_skipSbtAll && !mtsAllowed )
    {
      histBestSbt = 0; //try DCT2
    }
    else
    {
      int  slShift = 4 + std::min( Log2( cu->lwidth() * cu->lheight() ), 9 );
      assert( curPuSse != MAX_DISTORTION );
      histBestSbt = m_modeCtrl->findBestSbt( cu->cs->area, (uint32_t)( curPuSse >> slShift ) );
      if( m_skipSbtAll && CU::isSbtMode( histBestSbt ) ) //special case, skip SBT when loading SBT
      {
        histBestSbt = 0; //try DCT2
      }
    }
  }
}


inline void InterSearch::xTZSearchHelp( TZSearchStruct& rcStruct, const int iSearchX, const int iSearchY, const uint8_t ucPointNr, const uint32_t uiDistance )
{
  Distortion  uiSad = 0;

  const Pel* const  piRefSrch = rcStruct.piRefY + iSearchY * rcStruct.iRefStride + iSearchX;

  m_cDistParam.cur.buf = piRefSrch;

  uiSad = m_cDistParam.distFunc( m_cDistParam );

  // only add motion cost if uiSad is smaller than best. Otherwise pointless
  // to add motion cost.
  if( uiSad < rcStruct.uiBestSad )
  {
    // motion cost
    uiSad += m_pcRdCost->getCostOfVectorWithPredictor( iSearchX, iSearchY, rcStruct.imvShift );

    if( uiSad < rcStruct.uiBestSad )
    {
      rcStruct.uiBestSad      = uiSad;
      rcStruct.iBestX         = iSearchX;
      rcStruct.iBestY         = iSearchY;
      rcStruct.uiBestDistance = uiDistance;
      rcStruct.uiBestRound    = 0;
      rcStruct.ucPointNr      = ucPointNr;
      m_cDistParam.maximumDistortionForEarlyExit = uiSad;
    }
  }
}



inline void InterSearch::xTZ2PointSearch( TZSearchStruct& rcStruct )
{
  const SearchRange& sr = rcStruct.searchRange;

  static const int xOffset[2][9] = { {  0, -1, -1,  0, -1, +1, -1, -1, +1 }, {  0,  0, +1, +1, -1, +1,  0, +1,  0 } };
  static const int yOffset[2][9] = { {  0,  0, -1, -1, +1, -1,  0, +1,  0 }, {  0, -1, -1,  0, -1, +1, +1, +1, +1 } };

  // 2 point search,                   //   1 2 3
  // check only the 2 untested points  //   4 0 5
  // around the start point            //   6 7 8
  const int iX1 = rcStruct.iBestX + xOffset[0][rcStruct.ucPointNr];
  const int iX2 = rcStruct.iBestX + xOffset[1][rcStruct.ucPointNr];

  const int iY1 = rcStruct.iBestY + yOffset[0][rcStruct.ucPointNr];
  const int iY2 = rcStruct.iBestY + yOffset[1][rcStruct.ucPointNr];

  if( iX1 >= sr.left && iX1 <= sr.right && iY1 >= sr.top && iY1 <= sr.bottom )
  {
    xTZSearchHelp( rcStruct, iX1, iY1, 0, 2 );
  }

  if( iX2 >= sr.left && iX2 <= sr.right && iY2 >= sr.top && iY2 <= sr.bottom )
  {
    xTZSearchHelp( rcStruct, iX2, iY2, 0, 2 );
  }
}

inline void InterSearch::xTZ4PointSquareSearch( TZSearchStruct & rcStruct, const int iStartX, const int iStartY, const int iDist )
{
  const SearchRange& sr = rcStruct.searchRange;
  CHECK( iDist == 0 || iDist > 2, "Invalid distance" );
  // 4 point search,                   //     1 2 3
  // search around the start point     //     4 0 5
  // with the required  distance       //     6 7 8
  const int iTop = iStartY - iDist;
  const int iBottom = iStartY + iDist;
  const int iLeft = iStartX - iDist;
  const int iRight = iStartX + iDist;
  rcStruct.uiBestRound += 1;

  if ( iTop >= sr.top )
  {
    if ( iLeft >= sr.left ) // check top left
    {
      xTZSearchHelp( rcStruct, iLeft, iTop, 1, iDist );
    }
    if ( iRight <= sr.right ) // check top right
    {
      xTZSearchHelp( rcStruct, iRight, iTop, 3, iDist );
    }
  }
  if ( iBottom <= sr.bottom )
  {
    if ( iLeft >= sr.left ) // check bottom left
    {
      xTZSearchHelp( rcStruct, iLeft, iBottom, 6, iDist );
    }
    if ( iRight <= sr.right ) // check bottom right
    {
      xTZSearchHelp( rcStruct, iRight, iBottom, 8, iDist );
    }
  }
}

inline void InterSearch::xTZ8PointSquareSearch( TZSearchStruct& rcStruct, const int iStartX, const int iStartY, const int iDist )
{
  const SearchRange& sr = rcStruct.searchRange;
  // 8 point search,                   //   1 2 3
  // search around the start point     //   4 0 5
  // with the required  distance       //   6 7 8
  CHECK( iDist == 0 , "Invalid distance");
  const int iTop        = iStartY - iDist;
  const int iBottom     = iStartY + iDist;
  const int iLeft       = iStartX - iDist;
  const int iRight      = iStartX + iDist;
  rcStruct.uiBestRound += 1;

  if ( iTop >= sr.top ) // check top
  {
    if ( iLeft >= sr.left ) // check top left
    {
      xTZSearchHelp( rcStruct, iLeft, iTop, 1, iDist );
    }
    // top middle
    xTZSearchHelp( rcStruct, iStartX, iTop, 2, iDist );

    if ( iRight <= sr.right ) // check top right
    {
      xTZSearchHelp( rcStruct, iRight, iTop, 3, iDist );
    }
  } // check top
  if ( iLeft >= sr.left ) // check middle left
  {
    xTZSearchHelp( rcStruct, iLeft, iStartY, 4, iDist );
  }
  if ( iRight <= sr.right ) // check middle right
  {
    xTZSearchHelp( rcStruct, iRight, iStartY, 5, iDist );
  }
  if ( iBottom <= sr.bottom ) // check bottom
  {
    if ( iLeft >= sr.left ) // check bottom left
    {
      xTZSearchHelp( rcStruct, iLeft, iBottom, 6, iDist );
    }
    // check bottom middle
    xTZSearchHelp( rcStruct, iStartX, iBottom, 7, iDist );

    if ( iRight <= sr.right ) // check bottom right
    {
      xTZSearchHelp( rcStruct, iRight, iBottom, 8, iDist );
    }
  } // check bottom
}

inline void InterSearch::xTZ8PointDiamondSearch( TZSearchStruct& rcStruct,
                                                 const int iStartX,
                                                 const int iStartY,
                                                 const int iDist,
                                                 const bool bCheckCornersAtDist1 )
{
  const SearchRange& sr = rcStruct.searchRange;
  // 8 point search,                   //   1 2 3
  // search around the start point     //   4 0 5
  // with the required  distance       //   6 7 8
  CHECK( iDist == 0, "Invalid distance" );
  const int iTop        = iStartY - iDist;
  const int iBottom     = iStartY + iDist;
  const int iLeft       = iStartX - iDist;
  const int iRight      = iStartX + iDist;
  rcStruct.uiBestRound += 1;

  if ( iDist == 1 )
  {
    if ( iTop >= sr.top ) // check top
    {
      if (bCheckCornersAtDist1)
      {
        if ( iLeft >= sr.left) // check top-left
        {
          xTZSearchHelp( rcStruct, iLeft, iTop, 1, iDist );
        }
        xTZSearchHelp( rcStruct, iStartX, iTop, 2, iDist );
        if ( iRight <= sr.right ) // check middle right
        {
          xTZSearchHelp( rcStruct, iRight, iTop, 3, iDist );
        }
      }
      else
      {
        xTZSearchHelp( rcStruct, iStartX, iTop, 2, iDist );
      }
    }
    if ( iLeft >= sr.left ) // check middle left
    {
      xTZSearchHelp( rcStruct, iLeft, iStartY, 4, iDist );
    }
    if ( iRight <= sr.right ) // check middle right
    {
      xTZSearchHelp( rcStruct, iRight, iStartY, 5, iDist );
    }
    if ( iBottom <= sr.bottom ) // check bottom
    {
      if (bCheckCornersAtDist1)
      {
        if ( iLeft >= sr.left) // check top-left
        {
          xTZSearchHelp( rcStruct, iLeft, iBottom, 6, iDist );
        }
        xTZSearchHelp( rcStruct, iStartX, iBottom, 7, iDist );
        if ( iRight <= sr.right ) // check middle right
        {
          xTZSearchHelp( rcStruct, iRight, iBottom, 8, iDist );
        }
      }
      else
      {
        xTZSearchHelp( rcStruct, iStartX, iBottom, 7, iDist );
      }
    }
  }
  else
  {
    if ( iDist <= 8 )
    {
      const int iTop_2      = iStartY - (iDist>>1);
      const int iBottom_2   = iStartY + (iDist>>1);
      const int iLeft_2     = iStartX - (iDist>>1);
      const int iRight_2    = iStartX + (iDist>>1);

      if (  iTop >= sr.top && iLeft >= sr.left &&
           iRight <= sr.right && iBottom <= sr.bottom ) // check border
      {
        xTZSearchHelp( rcStruct, iStartX,  iTop,      2, iDist    );
        xTZSearchHelp( rcStruct, iLeft_2,  iTop_2,    1, iDist>>1 );
        xTZSearchHelp( rcStruct, iRight_2, iTop_2,    3, iDist>>1 );
        xTZSearchHelp( rcStruct, iLeft,    iStartY,   4, iDist    );
        xTZSearchHelp( rcStruct, iRight,   iStartY,   5, iDist    );
        xTZSearchHelp( rcStruct, iLeft_2,  iBottom_2, 6, iDist>>1 );
        xTZSearchHelp( rcStruct, iRight_2, iBottom_2, 8, iDist>>1 );
        xTZSearchHelp( rcStruct, iStartX,  iBottom,   7, iDist    );
      }
      else // check border
      {
        if ( iTop >= sr.top ) // check top
        {
          xTZSearchHelp( rcStruct, iStartX, iTop, 2, iDist );
        }
        if ( iTop_2 >= sr.top ) // check half top
        {
          if ( iLeft_2 >= sr.left ) // check half left
          {
            xTZSearchHelp( rcStruct, iLeft_2, iTop_2, 1, (iDist>>1) );
          }
          if ( iRight_2 <= sr.right ) // check half right
          {
            xTZSearchHelp( rcStruct, iRight_2, iTop_2, 3, (iDist>>1) );
          }
        } // check half top
        if ( iLeft >= sr.left ) // check left
        {
          xTZSearchHelp( rcStruct, iLeft, iStartY, 4, iDist );
        }
        if ( iRight <= sr.right ) // check right
        {
          xTZSearchHelp( rcStruct, iRight, iStartY, 5, iDist );
        }
        if ( iBottom_2 <= sr.bottom ) // check half bottom
        {
          if ( iLeft_2 >= sr.left ) // check half left
          {
            xTZSearchHelp( rcStruct, iLeft_2, iBottom_2, 6, (iDist>>1) );
          }
          if ( iRight_2 <= sr.right ) // check half right
          {
            xTZSearchHelp( rcStruct, iRight_2, iBottom_2, 8, (iDist>>1) );
          }
        } // check half bottom
        if ( iBottom <= sr.bottom ) // check bottom
        {
          xTZSearchHelp( rcStruct, iStartX, iBottom, 7, iDist );
        }
      } // check border
    }
    else // iDist > 8
    {
      if ( iTop >= sr.top && iLeft >= sr.left &&
           iRight <= sr.right && iBottom <= sr.bottom ) // check border
      {
        xTZSearchHelp( rcStruct, iStartX, iTop,    0, iDist );
        xTZSearchHelp( rcStruct, iLeft,   iStartY, 0, iDist );
        xTZSearchHelp( rcStruct, iRight,  iStartY, 0, iDist );
        xTZSearchHelp( rcStruct, iStartX, iBottom, 0, iDist );
        for ( int index = 1; index < 4; index++ )
        {
          const int iPosYT = iTop    + ((iDist>>2) * index);
          const int iPosYB = iBottom - ((iDist>>2) * index);
          const int iPosXL = iStartX - ((iDist>>2) * index);
          const int iPosXR = iStartX + ((iDist>>2) * index);
          xTZSearchHelp( rcStruct, iPosXL, iPosYT, 0, iDist );
          xTZSearchHelp( rcStruct, iPosXR, iPosYT, 0, iDist );
          xTZSearchHelp( rcStruct, iPosXL, iPosYB, 0, iDist );
          xTZSearchHelp( rcStruct, iPosXR, iPosYB, 0, iDist );
        }
      }
      else // check border
      {
        if ( iTop >= sr.top ) // check top
        {
          xTZSearchHelp( rcStruct, iStartX, iTop, 0, iDist );
        }
        if ( iLeft >= sr.left ) // check left
        {
          xTZSearchHelp( rcStruct, iLeft, iStartY, 0, iDist );
        }
        if ( iRight <= sr.right ) // check right
        {
          xTZSearchHelp( rcStruct, iRight, iStartY, 0, iDist );
        }
        if ( iBottom <= sr.bottom ) // check bottom
        {
          xTZSearchHelp( rcStruct, iStartX, iBottom, 0, iDist );
        }
        for ( int index = 1; index < 4; index++ )
        {
          const int iPosYT = iTop    + ((iDist>>2) * index);
          const int iPosYB = iBottom - ((iDist>>2) * index);
          const int iPosXL = iStartX - ((iDist>>2) * index);
          const int iPosXR = iStartX + ((iDist>>2) * index);

          if ( iPosYT >= sr.top ) // check top
          {
            if ( iPosXL >= sr.left ) // check left
            {
              xTZSearchHelp( rcStruct, iPosXL, iPosYT, 0, iDist );
            }
            if ( iPosXR <= sr.right ) // check right
            {
              xTZSearchHelp( rcStruct, iPosXR, iPosYT, 0, iDist );
            }
          } // check top
          if ( iPosYB <= sr.bottom ) // check bottom
          {
            if ( iPosXL >= sr.left ) // check left
            {
              xTZSearchHelp( rcStruct, iPosXL, iPosYB, 0, iDist );
            }
            if ( iPosXR <= sr.right ) // check right
            {
              xTZSearchHelp( rcStruct, iPosXR, iPosYB, 0, iDist );
            }
          } // check bottom
        } // for ...
      } // check border
    } // iDist <= 8
  } // iDist == 1
}

Distortion InterSearch::xPatternRefinement( const CPelBuf* pcPatternKey,
                                            Mv baseRefMv,
                                            int iFrac, Mv& rcMvFrac,
                                            Distortion& uiDistBest,
                                            int& patternId,
                                            CPelBuf* pattern,
                                            bool useAltHpelIf )
{
  Distortion  uiDist;
  uiDistBest = m_pcEncCfg->m_fastSubPel == 1 ? uiDistBest : MAX_DISTORTION;
  uint32_t        uiDirecBest = 0;
  const int reduceTap = m_pcEncCfg->m_meReduceTap;

  Pel*  piRefPos;
  int iRefStride = pcPatternKey->width + 1;
  m_pcRdCost->setDistParam( m_cDistParam, *pcPatternKey, m_filteredBlock[0][0][0], iRefStride, m_lumaClpRng.bd, COMP_Y, 0, m_pcEncCfg->m_bUseHADME ? ( m_pcEncCfg->m_fastHad ? 2 : 1 ) : 0 );

  const ClpRng& clpRng = m_lumaClpRng;
  int width = pattern->width;
  int height = pattern->height;
  int srcStride = pattern->stride;

  int intStride = width + 1;
  int dstStride = width + 1;
  Pel* intPtr;
  Pel* dstPtr;
  int filterSize     = useAltHpelIf ? ( reduceTap >= 1 ? NTAPS_AFFINE : NTAPS_LUMA )
                                    : ( reduceTap == 1 ? NTAPS_AFFINE
                                                       : ( reduceTap == 0 ? NTAPS_LUMA : NTAPS_CHROMA ) );
  int halfFilterSize = ( filterSize >> 1 );
  const Pel* srcPtr  = pattern->buf - halfFilterSize*srcStride - 1;

  const ChromaFormat chFmt = m_currChromaFormat;

  Distortion distH[ 9 ] = { uiDistBest, uiDistBest, uiDistBest, uiDistBest, uiDistBest, uiDistBest, uiDistBest, uiDistBest, uiDistBest };
  const int TH = 17, TL = 15, shift = 4;

  const Mv* pcMvRefine = (iFrac == 2 ? s_acMvRefineH : s_acMvRefineQ);
  for (uint32_t i = 0; i < 9; i++)
  {
    if( m_pcEncCfg->m_fastSubPel == 1 )
    {
      if( s_skipQpelPosition[ patternId ][ i ] )
      {
        continue;
      }

      if( 2 == iFrac )
      {
        if ( ( 5 == i && 0 == uiDirecBest ) || ( 7 == i && 1 == uiDirecBest ) || ( 8 == i && ( 1 == uiDirecBest || 3 == uiDirecBest || 5 == uiDirecBest ) ) )
        {
          break;
        }

        if( 0 == i )
        {
          // split the prediction with funny widths into power-of-2 and +1 parts for the sake of SIMD speed-up
          m_if.filterHor( COMP_Y, srcPtr, srcStride, m_filteredBlockTmp[ 0 ][ 0 ], intStride, width, height + filterSize, 0 << MV_FRACTIONAL_BITS_DIFF, false, chFmt, clpRng, useAltHpelIf, 0, reduceTap );
          m_if.filterHor( COMP_Y, srcPtr + width, srcStride, m_filteredBlockTmp[ 0 ][ 0 ] + width, intStride, 1, height + filterSize, 0 << MV_FRACTIONAL_BITS_DIFF, false, chFmt, clpRng, useAltHpelIf, 0, reduceTap );

          // split the prediction with funny widths into power-of-2 and +1 parts for the sake of SIMD speed-up
          m_if.filterHor( COMP_Y, srcPtr, srcStride, m_filteredBlockTmp[ 2 ][ 0 ], intStride, width, height + filterSize, 2 << MV_FRACTIONAL_BITS_DIFF, false, chFmt, clpRng, useAltHpelIf, 0, reduceTap );
          m_if.filterHor( COMP_Y, srcPtr + width, srcStride, m_filteredBlockTmp[ 2 ][ 0 ] + width, intStride, 1, height + filterSize, 2 << MV_FRACTIONAL_BITS_DIFF, false, chFmt, clpRng, useAltHpelIf, 0, reduceTap );

          intPtr = m_filteredBlockTmp[ 0 ][ 0 ] + halfFilterSize * intStride + 1;
          dstPtr = m_filteredBlock[ 0 ][ 0 ][ 0 ];
          m_if.filterVer( COMP_Y, intPtr, intStride, dstPtr, dstStride, width + 0, height + 0, 0 << MV_FRACTIONAL_BITS_DIFF, false, true, chFmt, clpRng, useAltHpelIf, 0, reduceTap );
        }
        else if( 1 == i )
        {
          intPtr = m_filteredBlockTmp[ 0 ][ 0 ] + ( halfFilterSize - 1 ) * intStride + 1;
          dstPtr = m_filteredBlock[ 2 ][ 0 ][ 0 ];
          m_if.filterVer( COMP_Y, intPtr, intStride, dstPtr, dstStride, width + 0, height + 1, 2 << MV_FRACTIONAL_BITS_DIFF, false, true, chFmt, clpRng, useAltHpelIf, 0, reduceTap );
        }
        else if( 3 == i )
        {
          intPtr = m_filteredBlockTmp[ 2 ][ 0 ] + halfFilterSize * intStride;
          dstPtr = m_filteredBlock[ 0 ][ 2 ][ 0 ];
          // split the prediction with funny widths into power-of-2 and +1 parts for the sake of SIMD speed-up
          m_if.filterVer( COMP_Y, intPtr, intStride, dstPtr, dstStride, width, height + 0, 0 << MV_FRACTIONAL_BITS_DIFF, false, true, chFmt, clpRng, useAltHpelIf, 0, reduceTap );
          m_if.filterVer( COMP_Y, intPtr + width, intStride, dstPtr + width, dstStride, 1, height + 0, 0 << MV_FRACTIONAL_BITS_DIFF, false, true, chFmt, clpRng, useAltHpelIf, 0, reduceTap );
        }
        else if( 5 == i )
        {
          intPtr = m_filteredBlockTmp[ 2 ][ 0 ] + ( halfFilterSize - 1 ) * intStride;
          dstPtr = m_filteredBlock[ 2 ][ 2 ][ 0 ];
          // split the prediction with funny widths into power-of-2 and +1 parts for the sake of SIMD speed-up
          m_if.filterVer( COMP_Y, intPtr, intStride, dstPtr, dstStride, width, height + 1, 2 << MV_FRACTIONAL_BITS_DIFF, false, true, chFmt, clpRng, useAltHpelIf, 0, reduceTap );
          m_if.filterVer( COMP_Y, intPtr + width, intStride, dstPtr + width, dstStride, 1, height + 1, 2 << MV_FRACTIONAL_BITS_DIFF, false, true, chFmt, clpRng, useAltHpelIf, 0, reduceTap );
        }
      }
    }
    Mv cMvTest = pcMvRefine[ i ];
    cMvTest += baseRefMv;

    int horVal = cMvTest.hor * iFrac;
    int verVal = cMvTest.ver * iFrac;
    piRefPos = m_filteredBlock[verVal & 3][horVal & 3][0];

    if ( horVal == 2 && ( verVal & 1 ) == 0 )
    {
      piRefPos += 1;
    }
    if ( ( horVal & 1 ) == 0 && verVal == 2 )
    {
      piRefPos += iRefStride;
    }
    cMvTest = pcMvRefine[i];
    cMvTest += rcMvFrac;


    m_cDistParam.cur.buf   = piRefPos;
    uiDist = m_cDistParam.distFunc( m_cDistParam );
    uiDist += m_pcRdCost->getCostOfVectorWithPredictor( cMvTest.hor, cMvTest.ver, 0 );

    distH[ i ] = uiDist;
    if ( uiDist < uiDistBest )
    {
      uiDistBest  = uiDist;
      uiDirecBest = i;
      m_cDistParam.maximumDistortionForEarlyExit = uiDist;
    }
  }

  rcMvFrac = pcMvRefine[uiDirecBest];

  if( m_pcEncCfg->m_fastSubPel == 1 && iFrac == 2 )
  {
    switch ( uiDirecBest )
    {
    case 0:
      // hor
      distH[ 3 ] <<= shift;
      patternId += ( distH[ 3 ] > TH * distH[ 4 ] ? 2 : ( distH[ 3 ] < TL * distH[ 4 ] ? 1 : 0 ) );
      // ver
      distH[ 1 ] <<= shift;
      patternId += ( distH[ 1 ] > TH * distH[ 2 ] ? 6 : ( distH[ 1 ] < TL * distH[ 2 ] ? 3 : 0 ) );
      break;
    case 1:
      // hor
      distH[ 5 ] <<= shift;
      patternId += ( distH[ 5 ] > TH * distH[ 6 ] ? 4 : ( distH[ 5 ] < TL * distH[ 6 ] ? 2 : 0 ) );
      // ver
      patternId += ( distH[ 2 ] - distH[ 0 ] > distH[ 0 ] - distH[ 1 ] ? 1 : 0 );

      patternId += ( 41 == patternId ? 0 : 8 );
      break;
    case 2:
      // hor
      distH[ 7 ] <<= shift;
      patternId += ( distH[ 7 ] > TH * distH[ 8 ] ? 4 : ( distH[ 7 ] < TL * distH[ 8 ] ? 2 : 0 ) );
      // ver
      patternId += ( distH[ 1 ] - distH[ 0 ] > distH[ 0 ] - distH[ 2 ] ? 1 : 0 );

      patternId += ( 41 == patternId ? 0 : 13 );
      break;
    case 3:
      // hor
      patternId += ( distH[ 4 ] - distH[ 0 ] > distH[ 0 ] - distH[ 3 ] ? 1 : 0 );
      // ver
      distH[ 5 ] <<= shift;
      patternId += ( distH[ 5 ] > TH * distH[ 7 ] ? 4 : ( distH[ 5 ] < TL * distH[ 7 ] ? 2 : 0 ) );

      patternId += ( 41 == patternId ? 0 : 18 );
      break;
    case 4:
      // hor
      patternId += ( distH[ 3 ] - distH[ 0 ] > distH[ 0 ] - distH[ 4 ] ? 1 : 0 );
      // ver
      distH[ 6 ] <<= shift;
      patternId += ( distH[ 6 ] > TH * distH[ 8 ] ? 4 : ( distH[ 6 ] < TL * distH[ 8 ] ? 2 : 0 ) );

      patternId += ( 41 == patternId ? 0 : 23 );
      break;
    case 5:
      // hor
      patternId += ( distH[ 6 ] - distH[ 1 ] > distH[ 1 ] - distH[ 5 ] ? 1 : 0 );
      // ver
      patternId += ( distH[ 7 ] - distH[ 3 ] > distH[ 3 ] - distH[ 5 ] ? 2 : 0 );

      patternId += ( 41 == patternId ? 0 : 28 );
      break;
    case 6:
      // hor
      patternId += ( distH[ 5 ] - distH[ 1 ] > distH[ 1 ] - distH[ 6 ] ? 1 : 0 );
      // ver
      patternId += ( distH[ 8 ] - distH[ 4 ] > distH[ 4 ] - distH[ 6 ] ? 2 : 0 );

      patternId += ( 41 == patternId ? 0 : 31 );
      break;
    case 7:
      // hor
      patternId += ( distH[ 8 ] - distH[ 2 ] > distH[ 2 ] - distH[ 7 ] ? 1 : 0 );
      // ver
      patternId += ( distH[ 5 ] - distH[ 3 ] > distH[ 3 ] - distH[ 7 ] ? 2 : 0 );

      patternId += ( 41 == patternId ? 0 : 34 );
      break;
    case 8:
      // hor
      patternId += ( distH[ 7 ] - distH[ 2 ] > distH[ 2 ] - distH[ 8 ] ? 1 : 0 );
      // ver
      patternId += ( distH[ 6 ] - distH[ 4 ] > distH[ 4 ] - distH[ 8 ] ? 2 : 0 );

      patternId += ( 41 == patternId ? 0 : 37 );
      break;
    default:
      break;
    }
  }

  return uiDistBest;
}

//! search of the best candidate for inter prediction
bool InterSearch::predInterSearch(CodingUnit& cu, Partitioner& partitioner, double& bestCostInter)
{
  PROFILER_SCOPE_AND_STAGE_EXT( 1, _TPROF, P_INTER_MVD_SEARCH, cu.cs, partitioner.chType );
  CodingStructure& cs = *cu.cs;

  AMVPInfo     amvp[2];
  Mv           cMvSrchRngLT;
  Mv           cMvSrchRngRB;
  Mv           cMvZero;
  Mv           cMv[2];
  Mv           cMvBi[2];
  Mv           cMvTemp[2][MAX_REF_PICS];
  Mv           cMvHevcTemp[2][MAX_REF_PICS];
  int          iNumPredDir = cs.slice->isInterP() ? 1 : 2;

  Mv           cMvPred[2][MAX_REF_PICS];

  Mv           cMvPredBi[2][MAX_REF_PICS];
  int          aaiMvpIdxBi[2][MAX_REF_PICS];

  int          aaiMvpIdx[2][MAX_REF_PICS];
  int          aaiMvpNum[2][MAX_REF_PICS];

  AMVPInfo     aacAMVPInfo[2][MAX_REF_PICS];

  int          iRefIdx[2]={0,0}; //If un-initialized, may cause SEGV in bi-directional prediction iterative stage.
  int          iRefIdxBi[2] = { -1, -1 };

  uint32_t     uiMbBits[3] = {1, 1, 0};

  uint32_t     uiLastMode = 0;
  int          iRefStart, iRefEnd;

  int          symMode = 0;

  int          bestBiPRefIdxL1 = 0;
  int          bestBiPMvpL1    = 0;
  Distortion   biPDistTemp     = MAX_DISTORTION;

  uint8_t      BcwIdx          = (cu.cs->slice->isInterB() ? cu.BcwIdx : BCW_DEFAULT);
  bool         enforceBcwPred = false;

  // Loop over Prediction Units
  uint32_t     puIdx = 0;
  uint32_t     uiLastModeTemp = 0;
  Distortion   uiAffineCost = MAX_DISTORTION;
  Distortion   uiHevcCost = MAX_DISTORTION;
  bool checkAffine = (cu.imv == IMV_OFF);
  if (cu.cs->bestParent != nullptr && cu.cs->bestParent->getCU(CH_L,TREE_D) != nullptr && cu.cs->bestParent->getCU(CH_L,TREE_D)->affine == false)
  {
    m_skipPROF = true;
  }

  m_encOnly = true;
  {
    CU::spanMotionInfo( cu );
    Distortion   uiCost[2] = { MAX_DISTORTION, MAX_DISTORTION };
    Distortion   uiCostBi  =   MAX_DISTORTION;
    Distortion   uiCostTemp;

    uint32_t         uiBits[3];
    uint32_t         uiBitsTemp;
    Distortion   bestBiPDist = MAX_DISTORTION;

    Distortion   uiCostTempL0[MAX_NUM_REF];
    for (int iNumRef=0; iNumRef < MAX_NUM_REF; iNumRef++)
    {
      uiCostTempL0[iNumRef] = MAX_DISTORTION;
    }
    uint32_t         uiBitsTempL0[MAX_NUM_REF];

    Mv           mvValidList1;
    int          refIdxValidList1 = 0;
    uint32_t         bitsValidList1   = MAX_UINT;
    Distortion   costValidList1   = MAX_DISTORTION;

    CPelUnitBuf origBuf = cu.cs->getOrgBuf( cu );

    xGetBlkBits( cs.slice->isInterP(), puIdx, uiLastMode, uiMbBits );

    m_pcRdCost->selectMotionLambda();

    unsigned imvShift = cu.imv == IMV_HPEL ? 1 : (cu.imv << 1);

    //  Uni-directional prediction
    for ( int iRefList = 0; iRefList < iNumPredDir; iRefList++ )
    {
      RefPicList  refPicList = ( iRefList ? REF_PIC_LIST_1 : REF_PIC_LIST_0 );
      for (int iRefIdxTemp = 0; iRefIdxTemp < cs.slice->numRefIdx[ refPicList ]; iRefIdxTemp++)
      {
        uiBitsTemp = uiMbBits[iRefList];
        if ( cs.slice->numRefIdx[ refPicList ] > 1 )
        {
          uiBitsTemp += iRefIdxTemp+1;
          if ( iRefIdxTemp == cs.slice->numRefIdx[ refPicList ]-1 )
          {
            uiBitsTemp--;
          }
        }
        xEstimateMvPredAMVP( cu, origBuf, refPicList, iRefIdxTemp, cMvPred[iRefList][iRefIdxTemp], amvp[refPicList], biPDistTemp);

        aaiMvpIdx[iRefList][iRefIdxTemp] = cu.mvpIdx[refPicList];
        aaiMvpNum[iRefList][iRefIdxTemp] = cu.mvpNum[refPicList];

        if(cs.picHeader->mvdL1Zero && iRefList==1 && biPDistTemp < bestBiPDist)
        {
          bestBiPDist = biPDistTemp;
          bestBiPMvpL1 = aaiMvpIdx[iRefList][iRefIdxTemp];
          bestBiPRefIdxL1 = iRefIdxTemp;
        }

        uiBitsTemp += m_auiMVPIdxCost[aaiMvpIdx[iRefList][iRefIdxTemp]][AMVP_MAX_NUM_CANDS];

        if ( m_pcEncCfg->m_bFastMEForGenBLowDelayEnabled && iRefList == 1 )    // list 1
        {
          if ( cs.slice->list1IdxToList0Idx[ iRefIdxTemp ] >= 0 )
          {
            cMvTemp[1][iRefIdxTemp] = cMvTemp[0][cs.slice->list1IdxToList0Idx[iRefIdxTemp ]];
            uiCostTemp = uiCostTempL0[cs.slice->list1IdxToList0Idx[ iRefIdxTemp ]];
            /*first subtract the bit-rate part of the cost of the other list*/
            uiCostTemp -= m_pcRdCost->getCost( uiBitsTempL0[cs.slice->list1IdxToList0Idx[ iRefIdxTemp ]] );
            /*correct the bit-rate part of the current ref*/
            m_pcRdCost->setPredictor  ( cMvPred[iRefList][iRefIdxTemp] );
            uiBitsTemp += m_pcRdCost->getBitsOfVectorWithPredictor( cMvTemp[1][iRefIdxTemp].hor, cMvTemp[1][iRefIdxTemp].ver, imvShift + MV_FRACTIONAL_BITS_DIFF );
            /*calculate the correct cost*/
            uiCostTemp += m_pcRdCost->getCost( uiBitsTemp );
          }
          else
          {
            xMotionEstimation( cu, origBuf, refPicList, cMvPred[iRefList][iRefIdxTemp], iRefIdxTemp, cMvTemp[iRefList][iRefIdxTemp], aaiMvpIdx[iRefList][iRefIdxTemp], uiBitsTemp, uiCostTemp, amvp[refPicList] );
          }
        }
        else
        {
          xMotionEstimation( cu, origBuf, refPicList, cMvPred[iRefList][iRefIdxTemp], iRefIdxTemp, cMvTemp[iRefList][iRefIdxTemp], aaiMvpIdx[iRefList][iRefIdxTemp], uiBitsTemp, uiCostTemp, amvp[refPicList] );
        }
          
        if( cs.slice->sps->BCW && cu.BcwIdx == BCW_DEFAULT && cs.slice->isInterB() )
        {
          m_uniMotions.setReadMode( true, (uint32_t)iRefList, (uint32_t)iRefIdxTemp) ;
          m_uniMotions.copyFrom( cMvTemp[iRefList][iRefIdxTemp], uiCostTemp - m_pcRdCost->getCost(uiBitsTemp), (uint32_t)iRefList, (uint32_t)iRefIdxTemp );
        }

        xCopyAMVPInfo( &amvp[refPicList], &aacAMVPInfo[iRefList][iRefIdxTemp]); // must always be done ( also when AMVP_MODE = AM_NONE )
        xCheckBestMVP( refPicList, cMvTemp[iRefList][iRefIdxTemp], cMvPred[iRefList][iRefIdxTemp], aaiMvpIdx[iRefList][iRefIdxTemp], amvp[refPicList], uiBitsTemp, uiCostTemp, cu.imv );

        if ( iRefList == 0 )
        {
          uiCostTempL0[iRefIdxTemp] = uiCostTemp;
          uiBitsTempL0[iRefIdxTemp] = uiBitsTemp;
        }
        if ( uiCostTemp < uiCost[iRefList] )
        {
          uiCost[iRefList] = uiCostTemp;
          uiBits[iRefList] = uiBitsTemp; // storing for bi-prediction

          // set motion
          cMv    [iRefList] = cMvTemp[iRefList][iRefIdxTemp];
          iRefIdx[iRefList] = iRefIdxTemp;
        }

        if ( iRefList == 1 && uiCostTemp < costValidList1 && cs.slice->list1IdxToList0Idx[ iRefIdxTemp ] < 0 )
        {
          costValidList1 = uiCostTemp;
          bitsValidList1 = uiBitsTemp;

          // set motion
          mvValidList1     = cMvTemp[iRefList][iRefIdxTemp];
          refIdxValidList1 = iRefIdxTemp;
        }
      }
    }

    ::memcpy(cMvHevcTemp, cMvTemp, sizeof(cMvTemp));
    if (cu.imv == IMV_OFF && (!cu.slice->sps->BCW || BcwIdx == BCW_DEFAULT))
    {
      m_BlkUniMvInfoBuffer->insertUniMvCands(cu.Y(), &cMvTemp[0][0]);

      unsigned idx1, idx2, idx3, idx4;
      getAreaIdxNew(cu.Y(), *cs.pcv, idx1, idx2, idx3, idx4);
      if( ! m_ReuseUniMv->m_reusedUniMVs[idx1][idx2][idx3][idx4] )
      {
        m_ReuseUniMv->m_reusedUniMVs[idx1][idx2][idx3][idx4] = new Mv[ 2 * MAX_REF_PICS ];
//          DTRACE( g_trace_ctx, D_TMP, "%d unimv first reuse %d %d %d %d \n", g_trace_ctx->getChannelCounter(D_TMP), idx3,idx4,idx1,idx2 );
      }
      ::memcpy(m_ReuseUniMv->m_reusedUniMVs[idx1][idx2][idx3][idx4], cMvTemp, 2 * MAX_REF_PICS * sizeof(Mv));
    }
    if (bestCostInter != MAX_DOUBLE)
    {
      int L = (cu.slice->TLayer <= 2) ? 0 : (cu.slice->TLayer - 2);
      double besCostMerge = bestCostInter;
      bestCostInter = (uiCost[0] < uiCost[1]) ? uiCost[0] : uiCost[1];
      if ((cu.slice->TLayer > (m_pcEncCfg->m_maxTLayer - (m_pcEncCfg->m_FastInferMerge & 7))) && bestCostInter > MRG_FAST_RATIOMYV[L] * besCostMerge)
      {
        m_skipPROF = false;
        m_encOnly = false;
        return true;
      }
    }
    //  Bi-predictive Motion estimation
    if( cs.slice->isInterB() && !CU::isBipredRestriction( cu ) && (cu.slice->checkLDC || BcwIdx == BCW_DEFAULT  || !m_affineModeSelected || m_pcEncCfg->m_BCW != 2 ) )
    {
      PROFILER_SCOPE_AND_STAGE_EXT( 1, _TPROF, P_INTER_MVD_SEARCH_B, &cs, partitioner.chType );
      bool doBiPred = true;
      cMvBi[0] = cMv[0];
      cMvBi[1] = cMv[1];
      iRefIdxBi[0] = iRefIdx[0];
      iRefIdxBi[1] = iRefIdx[1];

      ::memcpy( cMvPredBi,   cMvPred,   sizeof( cMvPred   ) );
      ::memcpy( aaiMvpIdxBi, aaiMvpIdx, sizeof( aaiMvpIdx ) );

      uint32_t uiMotBits[2];

      if(cs.picHeader->mvdL1Zero)
      {
        // case: no mvd for L1
        // note: mv = mvp + mvd
        // mv for L1 is equal to mvp(L1) and the mvd search is only performed for L0
        xCopyAMVPInfo(&aacAMVPInfo[1][bestBiPRefIdxL1], &amvp[REF_PIC_LIST_1]);
        aaiMvpIdxBi[1][bestBiPRefIdxL1] = bestBiPMvpL1;
        cMvPredBi  [1][bestBiPRefIdxL1] = amvp[REF_PIC_LIST_1].mvCand[bestBiPMvpL1];
        if( m_pcEncCfg->m_ifpLines && !CU::isMvInRangeFPP( cu.ly(), cu.lheight(), cMvPredBi[1][bestBiPRefIdxL1].ver, m_pcEncCfg->m_ifpLines, *cu.cs->pcv ) )
        {
          // this mvp cannot be used for mv, skip Bi-pred
          uiCostBi = std::numeric_limits<Distortion>::max();
          doBiPred = false;
        }

        if( doBiPred )
        {
          cMvBi[1] = cMvPredBi[1][bestBiPRefIdxL1];
          iRefIdxBi[1] = bestBiPRefIdxL1;
          cu.mv[REF_PIC_LIST_1][0] = cMvBi[1];
          cu.refIdx[REF_PIC_LIST_1] = iRefIdxBi[1];
          cu.mvpIdx[REF_PIC_LIST_1] = bestBiPMvpL1;
          PelUnitBuf predBufTmp = m_tmpPredStorage[REF_PIC_LIST_1].getCompactBuf( cu );
          motionCompensation( cu, predBufTmp, REF_PIC_LIST_1 );

          uiMotBits[0] = uiBits[0] - uiMbBits[0];
          uiMotBits[1] = uiMbBits[1];

          if(cs.slice->numRefIdx[REF_PIC_LIST_1] > 1)
          {
            uiMotBits[1] += bestBiPRefIdxL1 + 1;
            if(bestBiPRefIdxL1 == cs.slice->numRefIdx[REF_PIC_LIST_1] - 1)
            {
              uiMotBits[1]--;
            }
          }

          uiMotBits[1] += m_auiMVPIdxCost[aaiMvpIdxBi[1][bestBiPRefIdxL1]][AMVP_MAX_NUM_CANDS];

          uiBits[2] = uiMbBits[2] + uiMotBits[0] + uiMotBits[1];

          cMvTemp[1][bestBiPRefIdxL1] = cMvBi[1];
        }
      }
      else
      {
        uiMotBits[0] = uiBits[0] - uiMbBits[0];
        uiMotBits[1] = uiBits[1] - uiMbBits[1];
        uiBits[2] = uiMbBits[2] + uiMotBits[0] + uiMotBits[1];
      }

      if( doBiPred )
      {
        // 4-times iteration (default)
        int iNumIter = 4;

        // fast encoder setting: only one iteration
        if ( m_pcEncCfg->m_fastInterSearchMode==VVENC_FASTINTERSEARCH_MODE3 || m_pcEncCfg->m_fastInterSearchMode==VVENC_FASTINTERSEARCH_MODE2 || cs.picHeader->mvdL1Zero )
        {
          iNumIter = 1;
        }

        enforceBcwPred = (BcwIdx != BCW_DEFAULT);

        for ( int iIter = 0; iIter < iNumIter; iIter++ )
        {
          int         iRefList    = iIter % 2;

          if ( m_pcEncCfg->m_fastInterSearchMode==VVENC_FASTINTERSEARCH_MODE3 || m_pcEncCfg->m_fastInterSearchMode==VVENC_FASTINTERSEARCH_MODE2 )
          {
            if( uiCost[0] <= uiCost[1] )
            {
              iRefList = 1;
            }
            else
            {
              iRefList = 0;
            }
          }
          else if ( iIter == 0 )
          {
            iRefList = 0;
          }
          if ( iIter == 0 && !cs.picHeader->mvdL1Zero)
          {
            cu.mv    [1 - iRefList][0] = cMv    [1 - iRefList];
            cu.refIdx[1 - iRefList]    = iRefIdx[1 - iRefList];

            PelUnitBuf predBufTmp = m_tmpPredStorage[1 - iRefList].getCompactBuf( cu );
            motionCompensation( cu, predBufTmp, RefPicList(1 - iRefList) );
          }

          RefPicList  refPicList = ( iRefList ? REF_PIC_LIST_1 : REF_PIC_LIST_0 );

          if(cs.picHeader->mvdL1Zero)
          {
            iRefList = 0;
            refPicList = REF_PIC_LIST_0;
          }

          bool bChanged = false;

          iRefStart = 0;
          iRefEnd   = cs.slice->numRefIdx[ refPicList ]-1;
          for (int iRefIdxTemp = iRefStart; iRefIdxTemp <= iRefEnd; iRefIdxTemp++)
          {
            uiBitsTemp = uiMbBits[2] + uiMotBits[1-iRefList];
            uiBitsTemp += ( (cs.slice->sps->BCW == true) ? getWeightIdxBits(BcwIdx) : 0 );
            if ( cs.slice->numRefIdx[ refPicList ] > 1 )
            {
              uiBitsTemp += iRefIdxTemp+1;
              if ( iRefIdxTemp == cs.slice->numRefIdx[ refPicList ]-1 )
              {
                uiBitsTemp--;
              }
            }
            uiBitsTemp += m_auiMVPIdxCost[aaiMvpIdxBi[iRefList][iRefIdxTemp]][AMVP_MAX_NUM_CANDS];
            if ( cs.slice->biDirPred )
            {
              uiBitsTemp += 1; // add one bit for symmetrical MVD mode
            }
            // call ME
            xCopyAMVPInfo(&aacAMVPInfo[iRefList][iRefIdxTemp], &amvp[refPicList] );
            xMotionEstimation ( cu, origBuf, refPicList, cMvPredBi[iRefList][iRefIdxTemp], iRefIdxTemp, cMvTemp[iRefList][iRefIdxTemp], aaiMvpIdxBi[iRefList][iRefIdxTemp], uiBitsTemp, uiCostTemp, amvp[refPicList], true );
            xCheckBestMVP( refPicList, cMvTemp[iRefList][iRefIdxTemp], cMvPredBi[iRefList][iRefIdxTemp], aaiMvpIdxBi[iRefList][iRefIdxTemp], amvp[refPicList], uiBitsTemp, uiCostTemp, cu.imv);
            if ( uiCostTemp < uiCostBi )
            {
              bChanged = true;

              cMvBi[iRefList]     = cMvTemp[iRefList][iRefIdxTemp];
              iRefIdxBi[iRefList] = iRefIdxTemp;

              uiCostBi            = uiCostTemp;
              uiMotBits[iRefList] = uiBitsTemp - uiMbBits[2] - uiMotBits[1-iRefList];
              uiMotBits[iRefList] -= ( (cs.slice->sps->BCW == true) ? getWeightIdxBits(BcwIdx) : 0 );
              uiBits[2]           = uiBitsTemp;

              if(iNumIter!=1)
              {
                //  Set motion
                cu.mv    [refPicList][0] = cMvBi    [iRefList];
                cu.refIdx[refPicList]    = iRefIdxBi[iRefList];

                PelUnitBuf predBufTmp = m_tmpPredStorage[iRefList].getCompactBuf( cu );
                motionCompensation( cu, predBufTmp, refPicList );
              }
            }
          } // for loop-iRefIdxTemp

          if( !bChanged )
          {
            if ((uiCostBi <= uiCost[0] && uiCostBi <= uiCost[1]) || enforceBcwPred)
            {
              xCopyAMVPInfo(&aacAMVPInfo[0][iRefIdxBi[0]], &amvp[REF_PIC_LIST_0]);
              xCheckBestMVP( REF_PIC_LIST_0, cMvBi[0], cMvPredBi[0][iRefIdxBi[0]], aaiMvpIdxBi[0][iRefIdxBi[0]], amvp[REF_PIC_LIST_0], uiBits[2], uiCostBi, cu.imv);
              if(!cs.picHeader->mvdL1Zero)
              {
                xCopyAMVPInfo(&aacAMVPInfo[1][iRefIdxBi[1]], &amvp[REF_PIC_LIST_1]);
                xCheckBestMVP( REF_PIC_LIST_1, cMvBi[1], cMvPredBi[1][iRefIdxBi[1]], aaiMvpIdxBi[1][iRefIdxBi[1]], amvp[REF_PIC_LIST_1], uiBits[2], uiCostBi, cu.imv);
              }
            }
            break;
          }
        } // for loop-iter
      }

      // SMVD
      if( cs.slice->biDirPred )
      {
        double th1 = 1.02;
        bool testSME = true;
        int numStartCand = m_pcEncCfg->m_SMVD > 1 ? 1 : 5;
        Distortion symCost;
        Mv cMvPredSym[2];
        int mvpIdxSym[2];

        int curRefList = REF_PIC_LIST_0;
        int tarRefList = 1 - curRefList;
        RefPicList eCurRefList = (curRefList ? REF_PIC_LIST_1 : REF_PIC_LIST_0);
        int refIdxCur = cs.slice->symRefIdx[ curRefList ];
        int refIdxTar = cs.slice->symRefIdx[ tarRefList ];
        if( aacAMVPInfo[ curRefList ][ refIdxCur ].mvCand[ 0 ] == aacAMVPInfo[ curRefList ][ refIdxCur ].mvCand[ 1 ] )
        {
          aacAMVPInfo[ curRefList ][ refIdxCur ].numCand = 1;
        }
        if( aacAMVPInfo[ tarRefList ][ refIdxTar ].mvCand[ 0 ] == aacAMVPInfo[ tarRefList ][ refIdxTar ].mvCand[ 1 ] )
        {
          aacAMVPInfo[ tarRefList ][ refIdxTar ].numCand = 1;
        }

        MvField cCurMvField, cTarMvField;
        Distortion costStart = MAX_DISTORTION;
        for ( int i = 0; i < aacAMVPInfo[curRefList][refIdxCur].numCand; i++ )
        {
          for ( int j = 0; j < aacAMVPInfo[tarRefList][refIdxTar].numCand; j++ )
          {
            GCC_WARNING_DISABLE_array_bounds // probably a bug in gcc-10 static analyzer: It thinks the indices are -1 and therefore triggers -Werror=array-bounds
            cCurMvField.setMvField( aacAMVPInfo[curRefList][refIdxCur].mvCand[i], refIdxCur );
            cTarMvField.setMvField( aacAMVPInfo[tarRefList][refIdxTar].mvCand[j], refIdxTar );
            GCC_WARNING_RESET
            if( m_pcEncCfg->m_ifpLines )
            {
              xCheckAndClipMvToFppLine( cCurMvField.mv, cu.ly(), cu.lheight(), m_pcEncCfg->m_ifpLines, *cu.cs->pcv );
              xCheckAndClipMvToFppLine( cTarMvField.mv, cu.ly(), cu.lheight(), m_pcEncCfg->m_ifpLines, *cu.cs->pcv );
            }
            Distortion cost = xGetSymCost( cu, origBuf, eCurRefList, cCurMvField, cTarMvField, BcwIdx );
            if ( cost < costStart )
            {
              costStart = cost;
              cMvPredSym[curRefList] = aacAMVPInfo[curRefList][refIdxCur].mvCand[i];
              cMvPredSym[tarRefList] = aacAMVPInfo[tarRefList][refIdxTar].mvCand[j];
              mvpIdxSym[curRefList] = i;
              mvpIdxSym[tarRefList] = j;
            }
          }
        }
        cCurMvField.mv = cMvPredSym[curRefList];
        cTarMvField.mv = cMvPredSym[tarRefList];

        m_pcRdCost->setCostScale(0);
        Mv pred = cMvPredSym[curRefList];
        pred.changeTransPrecInternal2Amvr(cu.imv);
        m_pcRdCost->setPredictor(pred);
        Mv mv = cCurMvField.mv;
        mv.changeTransPrecInternal2Amvr(cu.imv);
        uint32_t bits = m_pcRdCost->getBitsOfVectorWithPredictor(mv.hor, mv.ver, 0);
        bits += m_auiMVPIdxCost[mvpIdxSym[curRefList]][AMVP_MAX_NUM_CANDS];
        bits += m_auiMVPIdxCost[mvpIdxSym[tarRefList]][AMVP_MAX_NUM_CANDS];
        costStart += m_pcRdCost->getCost(bits);

        std::vector<Mv> symmvdCands;
        auto smmvdCandsGen = [&](Mv mvCand, bool mvPrecAdj)
        {
          if (mvPrecAdj && cu.imv)
          {
            mvCand.roundTransPrecInternal2Amvr(cu.imv);
          }

          bool toAddMvCand = true;
          for (std::vector<Mv>::iterator pos = symmvdCands.begin(); pos != symmvdCands.end(); pos++)
          {
            if (*pos == mvCand)
            {
              toAddMvCand = false;
              break;
            }
          }

          if (toAddMvCand)
          {
            symmvdCands.push_back(mvCand);
          }
        };

        smmvdCandsGen(cMvHevcTemp[curRefList][refIdxCur], false);
        smmvdCandsGen(cMvTemp[curRefList][refIdxCur], false);
        if (iRefIdxBi[curRefList] == refIdxCur)
        {
          smmvdCandsGen(cMvBi[curRefList], false);
        }
        for (int i = 0; i < m_BlkUniMvInfoBuffer->m_uniMvListSize; i++)
        {
          if( symmvdCands.size() >= numStartCand )
          {
            break;
          }
          BlkUniMvInfo* curMvInfo = m_BlkUniMvInfoBuffer->getBlkUniMvInfo(i);
          smmvdCandsGen(curMvInfo->uniMvs[curRefList][refIdxCur], true);
        }

        for (auto mvStart : symmvdCands)
        {
          bool checked = false; //if it has been checkin in the mvPred.
          for (int i = 0; i < aacAMVPInfo[curRefList][refIdxCur].numCand && !checked; i++)
          {
            checked |= (mvStart == aacAMVPInfo[curRefList][refIdxCur].mvCand[i]);
          }
          if (checked)
          {
            continue;
          }

          Distortion bestCost = costStart;
          xSymMvdCheckBestMvp(cu, origBuf, mvStart, (RefPicList)curRefList, aacAMVPInfo, BcwIdx, cMvPredSym, mvpIdxSym, costStart, false);
          if (costStart < bestCost)
          {
            cCurMvField.setMvField(mvStart, refIdxCur);
            cTarMvField.setMvField(mvStart.getSymmvdMv(cMvPredSym[curRefList], cMvPredSym[tarRefList]), refIdxTar);
          }
        }
        Mv startPtMv = cCurMvField.mv;

        Distortion mvpCost = m_pcRdCost->getCost(m_auiMVPIdxCost[mvpIdxSym[curRefList]][AMVP_MAX_NUM_CANDS] + m_auiMVPIdxCost[mvpIdxSym[tarRefList]][AMVP_MAX_NUM_CANDS]);
        symCost = costStart - mvpCost;

        // ME
        testSME = m_pcEncCfg->m_SMVD <= 2 || ( symCost < uiCostBi * th1 && uiCostBi < uiCost[ 0 ] && uiCostBi < uiCost[ 1 ] );
        if( testSME )
        {
          xSymMotionEstimation( cu, origBuf, cMvPredSym[ curRefList ], cMvPredSym[ tarRefList ], eCurRefList, cCurMvField, cTarMvField, symCost, BcwIdx );
        }

        symCost += mvpCost;

        if (startPtMv != cCurMvField.mv)
        { // if ME change MV, run a final check for best MVP.
          xSymMvdCheckBestMvp(cu, origBuf, cCurMvField.mv, (RefPicList)curRefList, aacAMVPInfo, BcwIdx, cMvPredSym, mvpIdxSym, symCost, true);
        }

        bits = uiMbBits[2];
        bits += 1; // add one bit for #symmetrical MVD mode
        bits += ( (cs.slice->sps->BCW == true) ? getWeightIdxBits(BcwIdx) : 0 );
        symCost += m_pcRdCost->getCost(bits);
        cTarMvField.setMvField(cCurMvField.mv.getSymmvdMv(cMvPredSym[curRefList], cMvPredSym[tarRefList]), refIdxTar);

        // save results
        if ( symCost < uiCostBi  
          && ( !m_pcEncCfg->m_ifpLines || 
          ( CU::isMvInRangeFPP( cu.ly(), cu.lheight(), cCurMvField.mv.ver, m_pcEncCfg->m_ifpLines, *cu.cs->pcv ) &&
            CU::isMvInRangeFPP( cu.ly(), cu.lheight(), cTarMvField.mv.ver, m_pcEncCfg->m_ifpLines, *cu.cs->pcv ) ) )          
          )
        {
          uiCostBi = symCost;
          symMode = 1 + curRefList;

          cMvBi[curRefList] = cCurMvField.mv;
          iRefIdxBi[curRefList] = cCurMvField.refIdx;
          aaiMvpIdxBi[curRefList][cCurMvField.refIdx] = mvpIdxSym[curRefList];
          cMvPredBi[curRefList][iRefIdxBi[curRefList]] = cMvPredSym[curRefList];

          cMvBi[tarRefList] = cTarMvField.mv;
          iRefIdxBi[tarRefList] = cTarMvField.refIdx;
          aaiMvpIdxBi[tarRefList][cTarMvField.refIdx] = mvpIdxSym[tarRefList];
          cMvPredBi[tarRefList][iRefIdxBi[tarRefList]] = cMvPredSym[tarRefList];
        }
      }
    } // if (B_SLICE)

      //  Clear Motion Field
    cu.mv [REF_PIC_LIST_0][0] = Mv();
    cu.mv [REF_PIC_LIST_1][0] = Mv();
    cu.mvd[REF_PIC_LIST_0][0] = cMvZero;
    cu.mvd[REF_PIC_LIST_1][0] = cMvZero;
    cu.refIdx[REF_PIC_LIST_0] = NOT_VALID;
    cu.refIdx[REF_PIC_LIST_1] = NOT_VALID;
    cu.mvpIdx[REF_PIC_LIST_0] = NOT_VALID;
    cu.mvpIdx[REF_PIC_LIST_1] = NOT_VALID;
    cu.mvpNum[REF_PIC_LIST_0] = NOT_VALID;
    cu.mvpNum[REF_PIC_LIST_1] = NOT_VALID;

    // Set Motion Field
    cMv    [1] = mvValidList1;
    iRefIdx[1] = refIdxValidList1;
    uiBits [1] = bitsValidList1;
    uiCost [1] = costValidList1;
    if( enforceBcwPred )
    {
      uiCost[0] = uiCost[1] = MAX_UINT;
    }

    uiLastModeTemp = uiLastMode;
    if ( uiCostBi <= uiCost[0] && uiCostBi <= uiCost[1])
    {
      bestCostInter = uiCostBi;
      uiLastMode = 2;
      cu.mv [REF_PIC_LIST_0][0] = cMvBi[0];
      cu.mv [REF_PIC_LIST_1][0] = cMvBi[1];
      cu.mvd[REF_PIC_LIST_0][0] = cMvBi[0] - cMvPredBi[0][iRefIdxBi[0]];
      cu.mvd[REF_PIC_LIST_1][0] = cMvBi[1] - cMvPredBi[1][iRefIdxBi[1]];
      cu.refIdx[REF_PIC_LIST_0] = iRefIdxBi[0];
      cu.refIdx[REF_PIC_LIST_1] = iRefIdxBi[1];
      cu.mvpIdx[REF_PIC_LIST_0] = aaiMvpIdxBi[0][iRefIdxBi[0]];
      cu.mvpIdx[REF_PIC_LIST_1] = aaiMvpIdxBi[1][iRefIdxBi[1]];
      cu.mvpNum[REF_PIC_LIST_0] = aaiMvpNum[0][iRefIdxBi[0]];
      cu.mvpNum[REF_PIC_LIST_1] = aaiMvpNum[1][iRefIdxBi[1]];
      cu.interDir = 3;

      cu.smvdMode = symMode;
    }
    else if ( uiCost[0] <= uiCost[1] )
    {
      bestCostInter = uiCost[0];
      uiLastMode = 0;
      cu.mv [REF_PIC_LIST_0][0] = cMv[0];
      cu.mvd[REF_PIC_LIST_0][0] = cMv[0] - cMvPred[0][iRefIdx[0]];
      cu.refIdx[REF_PIC_LIST_0] = iRefIdx[0];
      cu.mvpIdx[REF_PIC_LIST_0] = aaiMvpIdx[0][iRefIdx[0]];
      cu.mvpNum[REF_PIC_LIST_0] = aaiMvpNum[0][iRefIdx[0]];
      cu.interDir = 1;
    }
    else
    {
      bestCostInter = uiCost[1];
      uiLastMode = 1;
      cu.mv [REF_PIC_LIST_1][0] = cMv[1];
      cu.mvd[REF_PIC_LIST_1][0] = cMv[1] - cMvPred[1][iRefIdx[1]];
      cu.refIdx[REF_PIC_LIST_1] = iRefIdx[1];
      cu.mvpIdx[REF_PIC_LIST_1] = aaiMvpIdx[1][iRefIdx[1]];
      cu.mvpNum[REF_PIC_LIST_1] = aaiMvpNum[1][iRefIdx[1]];
      cu.interDir = 2;
    }

    if( BcwIdx != BCW_DEFAULT )
    {
      cu.BcwIdx = BCW_DEFAULT; // Reset to default for the Non-NormalMC modes.
    }
    uiHevcCost = (uiCostBi <= uiCost[0] && uiCostBi <= uiCost[1]) ? uiCostBi : ((uiCost[0] <= uiCost[1]) ? uiCost[0] : uiCost[1]);
    if (m_pcEncCfg->m_Affine > 2)
    {
      if (cu.slice->TLayer > 3)
      {
        checkAffine = false;
      }
      else
      {
        if( m_pcEncCfg->m_Affine >= 4 && cu.slice->TLayer >= 2 )
        {
          checkAffine = m_modeCtrl->comprCUCtx->bestCU ? (checkAffine && m_modeCtrl->comprCUCtx->bestCU->affine) : checkAffine;
        }
      }
    }
    if( checkAffine && cu.Y().width > 8 && cu.Y().height > 8 && m_pcEncCfg->m_Affine > 0 )
    {
      // Based on:
      // H. Pejman*, S. Coulombe*, C. Vazquez*, M. Jamali° and A. Vakili°
      // *École de technologie supérieure, °Summit Tech Multimedia
      // "An Adjustable Fast Decision Method for Affine Motion Estimation in VVC,"
      // ICIP, Kuala Lumpur, Malaysia, 2023, pp. 2695-2699, doi: 10.1109/ICIP49359.2023.10222750.
      // https://ieeexplore.ieee.org/document/10222750

      static const double affine_thr_coffs[3] = { 2.534229853866437, 0.05173246 ,0.87650414 };
      static const double affine_thr_param[5] = { 1, 1, 1, 1.3, 2.3 }; // TODO: Adapt if extending m_Affine range!
      const int qp         = cu.qp;
      const int blk_area   = cu.Y().area();
      const double threshold  = affine_thr_param[m_pcEncCfg->m_Affine - 1];

      //Multiple linear regression (MLR):
      //Y = b0 + b1*(QP) + b2*(LOG2(BLK_AREA))
      double log_affine_thr =
        affine_thr_coffs[0] +
        qp * affine_thr_coffs[1] +
        log2(blk_area) * affine_thr_coffs[2];

      //log_affine_thr is LOG 2 of estimated thr
      double affine_thr = pow(2, log_affine_thr) * threshold;

      double scaled_uiHevcCost = (double)uiHevcCost;

      //The trained coefficients are based on the cost of internal 10 BitDepth. So, the cost should be scaled if the internal BitDepth is not 10.
      if (m_pcEncCfg->m_internalBitDepth[0] !=10)
      {
        //Based on the CTC documnet to convert 8 bit to 10 bit video or vice versa, the VTM only multiply (8 to 10 bits) or divide (10 to 8 bits) pixel values to 4.
        //In this case, the cost values are approximately scaled by 4.
        //The trained data acquired from internal 10 bit data. So, if internal bit depth is 8, the conversion into 10-bit cost can be done as follows:
        scaled_uiHevcCost = uiHevcCost * (pow(2.0, 10-m_pcEncCfg->m_internalBitDepth[0]));
      }
      if( scaled_uiHevcCost < affine_thr )
      {
        checkAffine = false;
      }
    }
    if (cu.Y().width > 8 && cu.Y().height > 8 && cu.slice->sps->Affine && checkAffine)
    {
      PROFILER_SCOPE_AND_STAGE_EXT( 1, _TPROF, P_INTER_MVD_SEARCH_AFFINE, &cs, partitioner.chType );
      m_hevcCost = uiHevcCost;
      // save normal hevc result
      uint32_t uiMRGIndex = cu.mergeIdx;
      bool bMergeFlag = cu.mergeFlag;
      uint32_t uiInterDir = cu.interDir;
      int  iSymMode = cu.smvdMode;

      Mv cMvd[2];
      uint32_t uiMvpIdx[2], uiMvpNum[2];
      uiMvpIdx[0] = cu.mvpIdx[REF_PIC_LIST_0];
      uiMvpIdx[1] = cu.mvpIdx[REF_PIC_LIST_1];
      uiMvpNum[0] = cu.mvpNum[REF_PIC_LIST_0];
      uiMvpNum[1] = cu.mvpNum[REF_PIC_LIST_1];
      cMvd[0] = cu.mvd[REF_PIC_LIST_0][0];
      cMvd[1] = cu.mvd[REF_PIC_LIST_1][0];

      MvField cHevcMvField[2];
      cHevcMvField[0].setMvField(cu.mv[REF_PIC_LIST_0][0], cu.refIdx[REF_PIC_LIST_0]);
      cHevcMvField[1].setMvField(cu.mv[REF_PIC_LIST_1][0], cu.refIdx[REF_PIC_LIST_1]);

      // do affine ME & Merge
      cu.affineType = AFFINEMODEL_4PARAM;
      Mv acMvAffine4Para[2][MAX_REF_PICS][3];
      int refIdx4Para[2] = { -1, -1 };

      xPredAffineInterSearch(cu, origBuf, puIdx, uiLastModeTemp, uiAffineCost, cMvHevcTemp, acMvAffine4Para, refIdx4Para, BcwIdx, enforceBcwPred, (cs.slice->sps->BCW == true) ? getWeightIdxBits(BcwIdx) : 0 );

      if (cu.imv == IMV_OFF)
      {
        storeAffineMotion(cu.mv, cu.refIdx, AFFINEMODEL_4PARAM, BcwIdx);
      }
      if (cu.slice->sps->AffineType && uiAffineCost != MAX_DISTORTION)
      {
        if (uiAffineCost < uiHevcCost * 1.05) ///< condition for 6 parameter affine ME
        {
          // save 4 parameter results
          Mv bestMv[2][3], bestMvd[2][3];
          int bestMvpIdx[2], bestMvpNum[2], bestRefIdx[2];
          uint8_t bestInterDir;

          bestInterDir = cu.interDir;
          bestRefIdx[0] = cu.refIdx[0];
          bestRefIdx[1] = cu.refIdx[1];
          bestMvpIdx[0] = cu.mvpIdx[0];
          bestMvpIdx[1] = cu.mvpIdx[1];
          bestMvpNum[0] = cu.mvpNum[0];
          bestMvpNum[1] = cu.mvpNum[1];

          for (int refList = 0; refList < 2; refList++)
          {
            bestMv[refList][0] = cu.mv[refList][0];
            bestMv[refList][1] = cu.mv[refList][1];
            bestMv[refList][2] = cu.mv[refList][2];
            bestMvd[refList][0] = cu.mvd[refList][0];
            bestMvd[refList][1] = cu.mvd[refList][1];
            bestMvd[refList][2] = cu.mvd[refList][2];
          }

          refIdx4Para[0] = bestRefIdx[0];
          refIdx4Para[1] = bestRefIdx[1];

          Distortion uiAffine6Cost = MAX_DISTORTION;
          cu.affineType = AFFINEMODEL_6PARAM;
          xPredAffineInterSearch(cu, origBuf, puIdx, uiLastModeTemp, uiAffine6Cost, cMvHevcTemp, acMvAffine4Para, refIdx4Para, BcwIdx, enforceBcwPred, (cs.slice->sps->BCW == true) ? getWeightIdxBits(BcwIdx) : 0 );

          if (cu.imv == IMV_OFF)
          {
            storeAffineMotion(cu.mv, cu.refIdx, AFFINEMODEL_6PARAM, BcwIdx);
          }

          // reset to 4 parameter affine inter mode
          if (uiAffineCost <= uiAffine6Cost)
          {
            cu.affineType = AFFINEMODEL_4PARAM;
            cu.interDir = bestInterDir;
            cu.refIdx[0] = bestRefIdx[0];
            cu.refIdx[1] = bestRefIdx[1];
            cu.mvpIdx[0] = bestMvpIdx[0];
            cu.mvpIdx[1] = bestMvpIdx[1];
            cu.mvpNum[0] = bestMvpNum[0];
            cu.mvpNum[1] = bestMvpNum[1];

            for (int verIdx = 0; verIdx < 3; verIdx++)
            {
              cu.mvd[REF_PIC_LIST_0][verIdx] = bestMvd[0][verIdx];
              cu.mvd[REF_PIC_LIST_1][verIdx] = bestMvd[1][verIdx];
            }

            CU::setAllAffineMv(cu, bestMv[0][0], bestMv[0][1], bestMv[0][2], REF_PIC_LIST_0);
            CU::setAllAffineMv(cu, bestMv[1][0], bestMv[1][1], bestMv[1][2], REF_PIC_LIST_1);
          }
          else
          {
            uiAffineCost = uiAffine6Cost;
          }
        }

        uiAffineCost += m_pcRdCost->getCost(1); // add one bit for affine_type
      }

      if (uiHevcCost <= uiAffineCost)
      {
        // set hevc me result
        cu.affine = false;
        cu.mergeFlag = bMergeFlag;
        cu.mergeIdx = uiMRGIndex;
        cu.interDir = uiInterDir;
        cu.smvdMode = iSymMode;
        cu.mv[REF_PIC_LIST_0][0]  = cHevcMvField[0].mv;
        cu.refIdx[REF_PIC_LIST_0] = cHevcMvField[0].refIdx;
        cu.mv[REF_PIC_LIST_1][0]  = cHevcMvField[1].mv;
        cu.refIdx[REF_PIC_LIST_1] = cHevcMvField[1].refIdx;
        cu.mvpIdx[REF_PIC_LIST_0] = uiMvpIdx[0];
        cu.mvpIdx[REF_PIC_LIST_1] = uiMvpIdx[1];
        cu.mvpNum[REF_PIC_LIST_0] = uiMvpNum[0];
        cu.mvpNum[REF_PIC_LIST_1] = uiMvpNum[1];
        cu.mvd[REF_PIC_LIST_0][0] = cMvd[0];
        cu.mvd[REF_PIC_LIST_1][0] = cMvd[1];
      }
      else
      {
        cu.smvdMode = 0;
        CHECK(!cu.affine, "Wrong.");
        uiLastMode = uiLastModeTemp;
      }
    }

    if( cu.interDir == 3 && !cu.mergeFlag )
    {
      if (BcwIdx != BCW_DEFAULT)
      {
        cu.BcwIdx = BcwIdx;
      }
    }

    CU::spanMotionInfo( cu );

    m_skipPROF = false;
    m_encOnly  = false;
    //  MC
    PelUnitBuf predBuf = cu.cs->getPredBuf(cu);
    motionCompensation( cu, predBuf, REF_PIC_LIST_X );
    puIdx++;
  }

  return false;
}

// AMVP
void InterSearch::xEstimateMvPredAMVP( CodingUnit& cu, CPelUnitBuf& origBuf, RefPicList refPicList, int iRefIdx, Mv& rcMvPred, AMVPInfo& rAMVPInfo, Distortion& distBiP )
{
  Mv         cBestMv;
  int        iBestIdx   = 0;
  Distortion uiBestCost = MAX_DISTORTION;
  int        i;

  AMVPInfo*  pcAMVPInfo = &rAMVPInfo;

  // Fill the MV Candidates
  CU::fillMvpCand( cu, refPicList, iRefIdx, *pcAMVPInfo );

  // initialize Mvp index & Mvp
  iBestIdx = 0;
  cBestMv  = pcAMVPInfo->mvCand[0];

  PelUnitBuf predBuf = m_tmpStorageLCU.getCompactBuf( cu );

  //-- Check Minimum Cost.
  for( i = 0 ; i < pcAMVPInfo->numCand; i++)
  {
    Mv mvCand = pcAMVPInfo->mvCand[i];
    if( m_pcEncCfg->m_ifpLines )
      xClipMvSearch( mvCand, cu.lumaPos(), cu.lumaSize(),*cu.cs->pcv, true );

    Distortion uiTmpCost = xGetTemplateCost( cu, origBuf, predBuf, mvCand, i, AMVP_MAX_NUM_CANDS, refPicList, iRefIdx );
    if( uiBestCost > uiTmpCost )
    {
      uiBestCost  = uiTmpCost;
      cBestMv     = pcAMVPInfo->mvCand[i];
      iBestIdx    = i;
      distBiP     = uiTmpCost;
    }
  }

  // Setting Best MVP
  rcMvPred = cBestMv;
  cu.mvpIdx[refPicList] = iBestIdx;
  cu.mvpNum[refPicList] = pcAMVPInfo->numCand;

  return;
}

uint32_t InterSearch::xGetMvpIdxBits(int iIdx, int iNum)
{
  CHECK(iIdx < 0 || iNum < 0 || iIdx >= iNum, "Invalid parameters");

  if (iNum == 1)
  {
    return 0;
  }

  uint32_t uiLength = 1;
  int iTemp = iIdx;
  if ( iTemp == 0 )
  {
    return uiLength;
  }

  bool bCodeLast = ( iNum-1 > iTemp );

  uiLength += (iTemp-1);

  if( bCodeLast )
  {
    uiLength++;
  }

  return uiLength;
}

void InterSearch::xGetBlkBits( bool bPSlice, int iPartIdx, uint32_t uiLastMode, uint32_t uiBlkBit[3])
{
  uiBlkBit[0] = (! bPSlice) ? 3 : 1;
  uiBlkBit[1] = 3;
  uiBlkBit[2] = 5;
}

void InterSearch::xCopyAMVPInfo (AMVPInfo* pSrc, AMVPInfo* pDst)
{
  pDst->numCand = pSrc->numCand;
  for (int i = 0; i < pSrc->numCand; i++)
  {
    pDst->mvCand[i] = pSrc->mvCand[i];
  }
}

void InterSearch::xCheckBestMVP ( RefPicList refPicList, const Mv& cMv, Mv& rcMvPred, int& riMVPIdx, AMVPInfo& amvpInfo, uint32_t& ruiBits, Distortion& ruiCost, const uint8_t imv )
{
  if ( imv > 0 && imv < 3 )
  {
    return;
  }

  AMVPInfo* pcAMVPInfo = &amvpInfo;

  CHECK(pcAMVPInfo->mvCand[riMVPIdx] != rcMvPred, "Invalid MV prediction candidate");

  if (pcAMVPInfo->numCand < 2)
  {
    return;
  }

  m_pcRdCost->setCostScale ( 0    );

  int iBestMVPIdx = riMVPIdx;

  Mv pred = rcMvPred;
  pred.changeTransPrecInternal2Amvr(imv);
  m_pcRdCost->setPredictor( pred );
  Mv mv = cMv;
  mv.changeTransPrecInternal2Amvr(imv);
  int iOrgMvBits = m_pcRdCost->getBitsOfVectorWithPredictor(mv.hor, mv.ver, 0);
  iOrgMvBits += m_auiMVPIdxCost[riMVPIdx][AMVP_MAX_NUM_CANDS];
  int iBestMvBits = iOrgMvBits;

  for (int iMVPIdx = 0; iMVPIdx < pcAMVPInfo->numCand; iMVPIdx++)
  {
    if (iMVPIdx == riMVPIdx)
    {
      continue;
    }

    pred = pcAMVPInfo->mvCand[iMVPIdx];
    pred.changeTransPrecInternal2Amvr(imv);
    m_pcRdCost->setPredictor( pred );
    int iMvBits = m_pcRdCost->getBitsOfVectorWithPredictor(mv.hor, mv.ver, 0);
    iMvBits += m_auiMVPIdxCost[iMVPIdx][AMVP_MAX_NUM_CANDS];

    if (iMvBits < iBestMvBits)
    {
      iBestMvBits = iMvBits;
      iBestMVPIdx = iMVPIdx;
    }
  }

  if (iBestMVPIdx != riMVPIdx)  //if changed
  {
    rcMvPred = pcAMVPInfo->mvCand[iBestMVPIdx];

    riMVPIdx = iBestMVPIdx;
    uint32_t uiOrgBits = ruiBits;
    ruiBits = uiOrgBits - iOrgMvBits + iBestMvBits;
    ruiCost = (ruiCost - m_pcRdCost->getCost( uiOrgBits ))  + m_pcRdCost->getCost( ruiBits );
  }
}


Distortion InterSearch::xGetTemplateCost( const CodingUnit& cu,
                                          CPelUnitBuf& origBuf,
                                          PelUnitBuf&  predBuf,
                                          Mv           cMvCand,
                                          int          iMVPIdx,
                                          int          iMVPNum,
                                          RefPicList   refPicList,
                                          int          iRefIdx
)
{
  Distortion uiCost = MAX_DISTORTION;

  const Picture* picRef = cu.slice->getRefPic( refPicList, iRefIdx );
  clipMv( cMvCand, cu.lumaPos(), cu.lumaSize(), *cu.cs->pcv );

  // prediction pattern
  xPredInterBlk( COMP_Y, cu, picRef, cMvCand, predBuf, false, cu.slice->clpRngs[ COMP_Y ], false, false);

  // calc distortion

  uiCost = m_pcRdCost->getDistPart(origBuf.Y(), predBuf.Y(), cu.cs->sps->bitDepths[ CH_L ], COMP_Y, DF_SAD);
  uiCost += m_pcRdCost->getCost( m_auiMVPIdxCost[iMVPIdx][iMVPNum] );

  return uiCost;
}

void InterSearch::xMotionEstimation(CodingUnit& cu, CPelUnitBuf& origBuf, RefPicList refPicList, Mv& rcMvPred, int iRefIdxPred, Mv& rcMv, int& riMVPIdx, uint32_t& ruiBits, Distortion& ruiCost, const AMVPInfo& amvpInfo, bool bBi)
{
  if( cu.cs->sps->BCW && cu.BcwIdx != BCW_DEFAULT && !bBi && xReadBufferedUniMv( cu, refPicList, iRefIdxPred, rcMvPred, rcMv, ruiBits, ruiCost ) )
  {
    return;
  }

  Mv cMvHalf, cMvQter;

  CHECK(refPicList >= MAX_NUM_REF_LIST_ADAPT_SR || iRefIdxPred>=int(MAX_IDX_ADAPT_SR), "Invalid reference picture list");
  m_iSearchRange = m_aaiAdaptSR[refPicList][iRefIdxPred];

  int    iSrchRng   = (bBi ? m_bipredSearchRange : m_iSearchRange);
  double fWeight    = 1.0;

  CPelUnitBuf  origBufTmpCnst;
  CPelUnitBuf* pBuf      = &origBuf;

  if(bBi) // Bi-predictive ME
  {
    PelUnitBuf  origBufTmp = m_tmpStorageLCU.getCompactBuf( cu );
    // NOTE: Other buf contains predicted signal from another direction
    PelUnitBuf otherBuf = m_tmpPredStorage[1 - (int)refPicList].getCompactBuf( cu );
    origBufTmp.copyFrom(origBuf);
    origBufTmp.removeHighFreq( otherBuf, m_pcEncCfg->m_bClipForBiPredMeEnabled, cu.slice->clpRngs );
   
    origBufTmpCnst = origBufTmp;
    pBuf           = &origBufTmpCnst;
    fWeight        = xGetMEDistortionWeight( cu.BcwIdx, refPicList );
  }

  //  Search key pattern initialization
  CPelBuf  tmpPattern   = pBuf->Y();
  CPelBuf* pcPatternKey = &tmpPattern;

  m_lumaClpRng = cu.cs->slice->clpRngs[ COMP_Y ];

  const Picture* refPic = cu.slice->getRefPic(refPicList, iRefIdxPred);
  CPelBuf buf = refPic->getRecoBuf(cu.blocks[COMP_Y]);

  TZSearchStruct cStruct;
  cStruct.pcPatternKey  = pcPatternKey;
  cStruct.iRefStride    = buf.stride;
  cStruct.piRefY        = buf.buf;
  cStruct.imvShift      = cu.imv == IMV_HPEL ? 1 : (cu.imv << 1);
  cStruct.useAltHpelIf  = cu.imv == IMV_HPEL;
  cStruct.zeroMV        = false;
  cStruct.uiBestSad     = MAX_DISTORTION;


  CodedCUInfo &relatedCU = m_modeCtrl->getBlkInfo( cu );

  bool bQTBTMV = false;
  Mv cIntMv;
  if( !bBi )
  {
    bool bValid = relatedCU.getMv( refPicList, iRefIdxPred, cIntMv );
    if( bValid )
    {
      bQTBTMV = true;
      cIntMv.changePrecision( MV_PRECISION_INT, MV_PRECISION_INTERNAL);
    }
  }

  Mv predQuarter = rcMvPred;
  predQuarter.changePrecision(MV_PRECISION_INTERNAL, MV_PRECISION_QUARTER);
  m_pcRdCost->setPredictor( predQuarter );
  m_pcRdCost->setCostScale(2);

  //  Do integer search
  if( m_motionEstimationSearchMethod == VVENC_MESEARCH_FULL || bBi )
  {
    cStruct.subShiftMode = m_pcEncCfg->m_fastInterSearchMode == VVENC_FASTINTERSEARCH_MODE1 || m_pcEncCfg->m_fastInterSearchMode == VVENC_FASTINTERSEARCH_MODE3 ? 1 : 0;
    m_pcRdCost->setDistParam( m_cDistParam, *cStruct.pcPatternKey, cStruct.piRefY, cStruct.iRefStride, m_lumaClpRng.bd, COMP_Y, cStruct.subShiftMode );

    Mv bestInitMv = (bBi ? rcMv : rcMvPred);
    Mv cTmpMv     = bestInitMv;
    xClipMvSearch(cTmpMv, cu.lumaPos(), cu.lumaSize(), *cu.cs->pcv, m_pcEncCfg->m_ifpLines );
    cTmpMv.changePrecision(MV_PRECISION_INTERNAL, MV_PRECISION_INT);
    m_cDistParam.cur.buf = cStruct.piRefY + (cTmpMv.ver * cStruct.iRefStride) + cTmpMv.hor;
    Distortion uiBestSad = m_cDistParam.distFunc(m_cDistParam);
    uiBestSad += m_pcRdCost->getCostOfVectorWithPredictor(cTmpMv.hor, cTmpMv.ver, cStruct.imvShift);

    Mv prevMv[BlkUniMvInfoBuffer::m_uniMvListMaxSize];

    for( int i = 0; i < m_BlkUniMvInfoBuffer->m_uniMvListSize; i++ )
    {
      const BlkUniMvInfo* curMvInfo = m_BlkUniMvInfoBuffer->getBlkUniMvInfo( i );
      cTmpMv = curMvInfo->uniMvs[refPicList][iRefIdxPred];
      prevMv[i] = cTmpMv;

      int j = 0;
      for( ; j < i; j++ )
      {
        if( cTmpMv == prevMv[j] )
        {
          break;
        }
      }
      if( j < i )
        continue;

      xClipMvSearch(cTmpMv, cu.lumaPos(), cu.lumaSize(), *cu.cs->pcv, m_pcEncCfg->m_ifpLines);
      cTmpMv.changePrecision(MV_PRECISION_INTERNAL, MV_PRECISION_INT);
      m_cDistParam.cur.buf = cStruct.piRefY + (cTmpMv.ver * cStruct.iRefStride) + cTmpMv.hor;

      Distortion uiSad = m_cDistParam.distFunc(m_cDistParam);
      uiSad += m_pcRdCost->getCostOfVectorWithPredictor(cTmpMv.hor, cTmpMv.ver, cStruct.imvShift);
      if( uiSad < uiBestSad )
      {
        uiBestSad = uiSad;
        bestInitMv = curMvInfo->uniMvs[refPicList][iRefIdxPred];
        m_cDistParam.maximumDistortionForEarlyExit = uiSad;
      }
    }

    xSetSearchRange( cu, bestInitMv, iSrchRng, cStruct.searchRange );
    xPatternSearch ( cStruct, rcMv, ruiCost);
  }
  else if( bQTBTMV )
  {
    rcMv = cIntMv;
    cStruct.subShiftMode = ( m_pcEncCfg->m_fastInterSearchMode == VVENC_FASTINTERSEARCH_MODE1 || m_pcEncCfg->m_fastInterSearchMode == VVENC_FASTINTERSEARCH_MODE3 ) ? 1 : 0;
    xTZSearch( cu, refPicList, iRefIdxPred, cStruct, rcMv, ruiCost, false, true );
  }
  else
  {
    cStruct.subShiftMode = ( m_pcEncCfg->m_fastInterSearchMode == VVENC_FASTINTERSEARCH_MODE1 || m_pcEncCfg->m_fastInterSearchMode == VVENC_FASTINTERSEARCH_MODE3 ) ? 1 : 0;
    rcMv = rcMvPred;
    xPatternSearchFast(cu, refPicList, iRefIdxPred, cStruct, rcMv, ruiCost );
    relatedCU.setMv( refPicList, iRefIdxPred, rcMv );
  }

  DTRACE( g_trace_ctx, D_ME, "%d %d %d :MECostFPel<L%d,%d>: %d,%d,%dx%d, %d", DTRACE_GET_COUNTER( g_trace_ctx, D_ME ), cu.slice->poc, 0, ( int ) refPicList, ( int ) bBi, cu.Y().x, cu.Y().y, cu.Y().width, cu.Y().height, ruiCost );
  // sub-pel refinement for sub-pel resolution
  if ( cu.imv == IMV_OFF || cu.imv == IMV_HPEL )
  {
    if ( m_pcEncCfg->m_fastSubPel != 2 )
    {
      xPatternSearchFracDIF( cu, refPicList, iRefIdxPred, cStruct, rcMv, cMvHalf, cMvQter, ruiCost );
    }
    m_pcRdCost->setCostScale( 0 );
    rcMv <<= 2;
    rcMv  += ( cMvHalf <<= 1 );
    rcMv  += cMvQter;
    uint32_t uiMvBits = m_pcRdCost->getBitsOfVectorWithPredictor( rcMv.hor, rcMv.ver, cStruct.imvShift );
    ruiBits += uiMvBits;
    ruiCost = ( Distortion ) ( floor( fWeight * ( ( double ) ruiCost - ( double ) m_pcRdCost->getCost( uiMvBits ) ) ) + ( double ) m_pcRdCost->getCost( ruiBits ) );
    rcMv.changePrecision(MV_PRECISION_QUARTER, MV_PRECISION_INTERNAL);
  }
  else // integer refinement for integer-pel and 4-pel resolution
  {
    rcMv.changePrecision(MV_PRECISION_INT, MV_PRECISION_INTERNAL);
    xPatternSearchIntRefine( cu, cStruct, rcMv, rcMvPred, riMVPIdx, ruiBits, ruiCost, amvpInfo, fWeight);
  }
  DTRACE(g_trace_ctx, D_ME, "   MECost<L%d,%d>: %6d (%d)  MV:%d,%d\n", (int)refPicList, (int)bBi, ruiCost, ruiBits, rcMv.hor << 2, rcMv.ver << 2);
}

void InterSearch::xClipMvSearch( Mv& rcMv, const Position& pos, const struct Size& size, const PreCalcValues& pcv, const int ifpLines )
{
  int iMvShift = MV_FRACTIONAL_BITS_INTERNAL;
  int iOffset = 8;
  int iHorMax = ( pcv.lumaWidth + iOffset - ( int ) pos.x - 1 ) << iMvShift;
  int iHorMin = ( -( int ) pcv.maxCUSize   - iOffset - ( int ) pos.x + 1 ) * (1 << iMvShift);

  int maxLumaHeight = ifpLines && ((pos.y >> pcv.maxCUSizeLog2) + ifpLines + 1 < pcv.heightInCtus) ? 
    
    (((pos.y >> pcv.maxCUSizeLog2) + ifpLines + 1) << pcv.maxCUSizeLog2 ) - size.height - 4  // 4 samples from DCTIF vertical bottom part

    : pcv.lumaHeight + iOffset;

  int iVerMax = ( maxLumaHeight - ( int ) pos.y - 1 ) << iMvShift;
  int iVerMin = ( -( int ) pcv.maxCUSize   - iOffset - ( int ) pos.y + 1 ) * (1 << iMvShift);

  rcMv.hor = ( std::min( iHorMax, std::max( iHorMin, rcMv.hor ) ) );
  rcMv.ver = ( std::min( iVerMax, std::max( iVerMin, rcMv.ver ) ) );
}

void InterSearch::xClipMvToFppLine( Mv& mv, const int yB, const int nH, const int ifpLines, const PreCalcValues& pcv )
{
  const int yCompScale = 0;
  const int mvPrecShift = MV_FRACTIONAL_BITS_INTERNAL;
  const int ctuLogScale = pcv.maxCUSizeLog2 - yCompScale;
  const int yRefMax     = ( ( ( yB >> ctuLogScale ) + ifpLines + 1 ) << ctuLogScale ) - 1;
  const int yRefMv      = yB + nH + ( 4 >> yCompScale ) + (mv.ver >> mvPrecShift) - 1;
  CHECKD( yRefMv <= yRefMax, "Not expected" );
  mv.ver -= ( yRefMv - yRefMax ) << mvPrecShift;
}

void InterSearch::xCheckAndClipMvToFppLine( Mv& mv, const int yB, const int nH, const int ifpLines, const PreCalcValues& pcv )
{
  const int yCompScale  = 0;
  const int mvPrecShift = MV_FRACTIONAL_BITS_INTERNAL;
  const int ctuLogScale = pcv.maxCUSizeLog2 - yCompScale;
  const int yBMax       = ( pcv.heightInCtus - 1 - ifpLines ) << ctuLogScale;
  if( yB < yBMax )
  {
    const int yRefMax = ( ( ( yB >> ctuLogScale ) + ifpLines + 1 ) << ctuLogScale ) - 1;
    const int yRefMv  = yB + nH + ( 4 >> yCompScale ) + (mv.ver >> mvPrecShift) - 1;
    if( yRefMv > yRefMax )
    {
      // clip MV
      mv.ver -= (yRefMv - yRefMax) << mvPrecShift;
    }
  }
}

void InterSearch::xSetSearchRange ( const CodingUnit& cu,
                                    const Mv& cMvPred,
                                    const int iSrchRng,
                                    SearchRange& sr )
{
  const PreCalcValues& pcv = *cu.cs->pcv;
  const int iMvShift = MV_FRACTIONAL_BITS_INTERNAL;
  Mv cFPMvPred = cMvPred;
  clipMv( cFPMvPred, cu.lumaPos(), cu.lumaSize(), pcv );

  Mv mvTL(cFPMvPred.hor - (iSrchRng << iMvShift), cFPMvPred.ver - (iSrchRng << iMvShift));
  Mv mvBR(cFPMvPred.hor + (iSrchRng << iMvShift), cFPMvPred.ver + (iSrchRng << iMvShift));

  clipMv( mvTL, cu.lumaPos(), cu.lumaSize(), pcv);
  xClipMvSearch( mvBR, cu.lumaPos(), cu.lumaSize(), pcv, m_pcEncCfg->m_ifpLines );

  mvTL.divideByPowerOf2( iMvShift );
  mvBR.divideByPowerOf2( iMvShift );

  sr.left   = mvTL.hor;
  sr.top    = mvTL.ver;
  sr.right  = mvBR.hor;
  sr.bottom = mvBR.ver;
}


void InterSearch::xPatternSearch( TZSearchStruct&  cStruct,
                                  Mv&                 rcMv,
                                  Distortion&         ruiSAD )
{
  Distortion  uiSad;
  Distortion  uiSadBest = MAX_DISTORTION;
  int         iBestX = 0;
  int         iBestY = 0;

  //-- jclee for using the SAD function pointer
  m_pcRdCost->setDistParam( m_cDistParam, *cStruct.pcPatternKey, cStruct.piRefY, cStruct.iRefStride, m_lumaClpRng.bd, COMP_Y, cStruct.subShiftMode );

  const SearchRange& sr = cStruct.searchRange;

  const Pel* piRef = cStruct.piRefY + (sr.top * cStruct.iRefStride);
  for ( int y = sr.top; y <= sr.bottom; y++ )
  {
    for ( int x = sr.left; x <= sr.right; x++ )
    {
      //  find min. distortion position
      m_cDistParam.cur.buf = piRef + x;

      uiSad = m_cDistParam.distFunc( m_cDistParam );

      // motion cost
      uiSad += m_pcRdCost->getCostOfVectorWithPredictor( x, y, cStruct.imvShift );

      if ( uiSad < uiSadBest )
      {
        uiSadBest = uiSad;
        iBestX    = x;
        iBestY    = y;
        m_cDistParam.maximumDistortionForEarlyExit = uiSad;
      }
    }
    piRef += cStruct.iRefStride;
  }
  rcMv.set( iBestX, iBestY );

  cStruct.uiBestSad = uiSadBest; // th for testing
  ruiSAD = uiSadBest - m_pcRdCost->getCostOfVectorWithPredictor( iBestX, iBestY, cStruct.imvShift );
  return;
}


void InterSearch::xPatternSearchFast( const CodingUnit& cu,
                                      RefPicList            refPicList,
                                      int                   iRefIdxPred,
                                      TZSearchStruct&       cStruct,
                                      Mv&                   rcMv,
                                      Distortion&           ruiSAD )
{
  if( cu.cs->picture->useME )
  {
    switch ( m_motionEstimationSearchMethodSCC )
    {
      case 3: //VVENC_MESEARCH_DIAMOND_FAST:
        xTZSearch( cu, refPicList, iRefIdxPred, cStruct, rcMv, ruiSAD, true, true );
        break;
      case 2: //VVENC_MESEARCH_DIAMOND:
        xTZSearch( cu, refPicList, iRefIdxPred, cStruct, rcMv, ruiSAD, true );
        break;
      default:
        THROW("shouldn't get here");
        break;
    }
    return;
  }

  switch ( m_motionEstimationSearchMethod )
  {
    case VVENC_MESEARCH_DIAMOND_FAST:
      xTZSearch         ( cu, refPicList, iRefIdxPred, cStruct, rcMv, ruiSAD, false, true );
      break;
    case VVENC_MESEARCH_DIAMOND:
      xTZSearch         ( cu, refPicList, iRefIdxPred, cStruct, rcMv, ruiSAD, false );
      break;
    case VVENC_MESEARCH_DIAMOND_ENHANCED:
      xTZSearch         ( cu, refPicList, iRefIdxPred, cStruct, rcMv, ruiSAD, true );
      break;
    case VVENC_MESEARCH_FULL:
    default:
      THROW("shouldn't get here");
      break;
  }
}


void InterSearch::xTZSearch( const CodingUnit& cu,
                             RefPicList            refPicList,
                             int                   iRefIdxPred,
                             TZSearchStruct&       cStruct,
                             Mv&                   rcMv,
                             Distortion&           ruiSAD,
                             const bool            bExtendedSettings,
                             const bool            bFastSettings)
{
  const bool bUseRasterInFastMode                    = true; //toggle this to further reduce runtime
  const bool bUseAdaptiveRaster                      = bExtendedSettings;
  const int  iRaster                                 = (bFastSettings && bUseRasterInFastMode) ? 8 : 5;
  const bool bTestZeroVector                         = true && !bFastSettings;
  const bool bTestZeroVectorStart                    = bExtendedSettings;
  const bool bTestZeroVectorStop                     = false;
  const bool bFirstSearchDiamond                     = true;  // 1 = xTZ8PointDiamondSearch   0 = xTZ8PointSquareSearch
  const bool bFirstCornersForDiamondDist1            = bExtendedSettings;
  const bool bFirstSearchStop                        = m_pcEncCfg->m_bFastMEAssumingSmootherMVEnabled;
  const uint32_t uiFirstSearchRounds                 = bFastSettings ? (bUseRasterInFastMode?3:2) : 3;     // first search stop X rounds after best match (must be >=1)
  const bool bEnableRasterSearch                     = bFastSettings ? bUseRasterInFastMode : true;
  const bool bAlwaysRasterSearch                     = bExtendedSettings;  // true: BETTER but factor 2 slower
  const bool bRasterRefinementEnable                 = false; // enable either raster refinement or star refinement
  const bool bRasterRefinementDiamond                = false; // 1 = xTZ8PointDiamondSearch   0 = xTZ8PointSquareSearch
  const bool bRasterRefinementCornersForDiamondDist1 = bExtendedSettings;
  const bool bStarRefinementEnable                   = true;  // enable either star refinement or raster refinement
  const bool bStarRefinementDiamond                  = true;  // 1 = xTZ8PointDiamondSearch   0 = xTZ8PointSquareSearch
  const bool bStarRefinementCornersForDiamondDist1   = bExtendedSettings;
  const bool bStarRefinementStop                     = bFastSettings;
  const uint32_t uiStarRefinementRounds              = 2;  // star refinement stop X rounds after best match (must be >=1)
  const bool bNewZeroNeighbourhoodTest               = bExtendedSettings;

  int iSearchRange = m_iSearchRange;
  xClipMvSearch( rcMv, cu.lumaPos(), cu.lumaSize(),*cu.cs->pcv, m_pcEncCfg->m_ifpLines );
  rcMv.changePrecision(MV_PRECISION_INTERNAL, MV_PRECISION_QUARTER);
  rcMv.divideByPowerOf2(2);

  //
  m_cDistParam.maximumDistortionForEarlyExit = cStruct.uiBestSad;
  m_pcRdCost->setDistParam( m_cDistParam, *cStruct.pcPatternKey, cStruct.piRefY, cStruct.iRefStride, m_lumaClpRng.bd, COMP_Y, cStruct.subShiftMode );

  // set rcMv (Median predictor) as start point and as best point
  xTZSearchHelp( cStruct, rcMv.hor, rcMv.ver, 0, 0 );

  // test whether zero Mv is better start point than Median predictor
  if ( bTestZeroVector )
  {
    if( ( rcMv.hor != 0 || rcMv.ver != 0 ) && ( 0 != cStruct.iBestX || 0 != cStruct.iBestY ) )
    {
      // only test 0-vector if not obviously previously tested.
      xTZSearchHelp( cStruct, 0, 0, 0, 0 );
    }
  }

  SearchRange& sr = cStruct.searchRange;

  for (int i = 0; i < m_BlkUniMvInfoBuffer->m_uniMvListSize; i++)
  {
    const BlkUniMvInfo* curMvInfo = m_BlkUniMvInfoBuffer->getBlkUniMvInfo(i);
    Mv cTmpMv = curMvInfo->uniMvs[refPicList][iRefIdxPred];

    xClipMvSearch(cTmpMv, cu.lumaPos(), cu.lumaSize(), *cu.cs->pcv, m_pcEncCfg->m_ifpLines);
    cTmpMv.changePrecision(MV_PRECISION_INTERNAL, MV_PRECISION_INT);
    m_cDistParam.cur.buf = cStruct.piRefY + (cTmpMv.ver * cStruct.iRefStride) + cTmpMv.hor;

    Distortion uiSad = m_cDistParam.distFunc(m_cDistParam);
    uiSad += m_pcRdCost->getCostOfVectorWithPredictor(cTmpMv.hor, cTmpMv.ver, cStruct.imvShift);
    if (uiSad < cStruct.uiBestSad)
    {
      cStruct.uiBestSad = uiSad;
      cStruct.iBestX = cTmpMv.hor;
      cStruct.iBestY = cTmpMv.ver;
      m_cDistParam.maximumDistortionForEarlyExit = uiSad;
    }
  }

  {
    // set search range
    Mv currBestMv(cStruct.iBestX, cStruct.iBestY );
    currBestMv <<= MV_FRACTIONAL_BITS_INTERNAL;
    xSetSearchRange(cu, currBestMv, m_iSearchRange >> (bFastSettings ? 1 : 0), sr );
  }

  // starting point after initial examination
  int  iDist = 0;
  int  iStartX = cStruct.iBestX;
  int  iStartY = cStruct.iBestY;

  // Early termination of motion search after selection of starting candidate
  if( m_pcEncCfg->m_bIntegerET )
  {
    bool isLargeBlock = cu.lumaSize().area() > 64;
    xTZ8PointDiamondSearch( cStruct, iStartX, iStartY, 1, false ); // 4-point small diamond search
    if ( cStruct.iBestX == iStartX && cStruct.iBestY == iStartY )
    {
      if ( isLargeBlock )
      {
        xTZ4PointSquareSearch( cStruct, iStartX, iStartY, 1 );
        if ( cStruct.iBestX == iStartX && cStruct.iBestY == iStartY )
        {
          // write out best match
          rcMv.set( cStruct.iBestX, cStruct.iBestY );
          ruiSAD = cStruct.uiBestSad - m_pcRdCost->getCostOfVectorWithPredictor( cStruct.iBestX, cStruct.iBestY, cStruct.imvShift );
          return;
        }
      }
      else
      {
        // write out best match
        rcMv.set( cStruct.iBestX, cStruct.iBestY );
        ruiSAD = cStruct.uiBestSad - m_pcRdCost->getCostOfVectorWithPredictor( cStruct.iBestX, cStruct.iBestY, cStruct.imvShift );
        return;
      }
    }
  }

  // start search
  iDist = 0;
  iStartX = cStruct.iBestX;
  iStartY = cStruct.iBestY;

  const bool bBestCandidateZero = ( cStruct.iBestX == 0 ) && ( cStruct.iBestY == 0 );

  // first search around best position up to now.
  // The following works as a "subsampled/log" window search around the best candidate
  for( iDist = 1; iDist <= iSearchRange; iDist *= 2 )
  {
    if( bFirstSearchDiamond == 1 )
    {
      xTZ8PointDiamondSearch( cStruct, iStartX, iStartY, iDist, bFirstCornersForDiamondDist1 );
    }
    else
    {
      xTZ8PointSquareSearch( cStruct, iStartX, iStartY, iDist );
    }

    if( bFirstSearchStop && ( cStruct.uiBestRound >= uiFirstSearchRounds ) ) // stop criterion
    {
      break;
    }
  }

  if( bNewZeroNeighbourhoodTest )
  {
    if( bTestZeroVectorStart && !bBestCandidateZero )
    {
      for( iDist = 1; iDist <= ( iSearchRange >> 1 ); iDist *= 2 )
      {
        xTZ8PointDiamondSearch( cStruct, 0, 0, iDist, false );
        if( bTestZeroVectorStop && ( cStruct.uiBestRound > 2 ) ) // stop criterion
        {
          break;
        }
      }
    }
  }

  // calculate only 2 missing points instead 8 points if cStruct.uiBestDistance == 1
  if ( cStruct.uiBestDistance == 1 )
  {
    cStruct.uiBestDistance = 0;
    xTZ2PointSearch( cStruct );
  }

  // raster search if distance is too big
  if( bUseAdaptiveRaster )
  {
    int iWindowSize     = iRaster;
    SearchRange localsr = sr;

    if( !( bEnableRasterSearch && ( ( ( int ) ( cStruct.uiBestDistance ) >= iRaster ) ) ) )
    {
      iWindowSize++;
      localsr.left    /= 2;
      localsr.right   /= 2;
      localsr.top     /= 2;
      localsr.bottom  /= 2;
    }

    cStruct.uiBestDistance = iWindowSize;

    for( iStartY = localsr.top; iStartY <= localsr.bottom; iStartY += iWindowSize )
    {
      for( iStartX = localsr.left; iStartX <= localsr.right; iStartX += iWindowSize )
      {
        xTZSearchHelp( cStruct, iStartX, iStartY, 0, iWindowSize );
      }
    }
  }
  else
  {
    if( bEnableRasterSearch && ( ( ( int ) ( cStruct.uiBestDistance ) >= iRaster ) || bAlwaysRasterSearch ) )
    {
      cStruct.uiBestDistance = iRaster;

      for( iStartY = sr.top; iStartY <= sr.bottom; iStartY += iRaster )
      {
        for( iStartX = sr.left; iStartX <= sr.right; iStartX += iRaster )
        {
          xTZSearchHelp( cStruct, iStartX, iStartY, 0, iRaster );
        }
      }
    }
  }

  // raster refinement

  if ( bRasterRefinementEnable && cStruct.uiBestDistance > 0 )
  {
    while ( cStruct.uiBestDistance > 0 )
    {
      iStartX = cStruct.iBestX;
      iStartY = cStruct.iBestY;
      if ( cStruct.uiBestDistance > 1 )
      {
        iDist = cStruct.uiBestDistance >>= 1;
        if ( bRasterRefinementDiamond == 1 )
        {
          xTZ8PointDiamondSearch ( cStruct, iStartX, iStartY, iDist, bRasterRefinementCornersForDiamondDist1 );
        }
        else
        {
          xTZ8PointSquareSearch  ( cStruct, iStartX, iStartY, iDist );
        }
      }

      // calculate only 2 missing points instead 8 points if cStruct.uiBestDistance == 1
      if ( cStruct.uiBestDistance == 1 )
      {
        cStruct.uiBestDistance = 0;
        if ( cStruct.ucPointNr != 0 )
        {
          xTZ2PointSearch( cStruct );
        }
      }
    }
  }

  // star refinement
  if ( bStarRefinementEnable && cStruct.uiBestDistance > 0 )
  {
    while ( cStruct.uiBestDistance > 0 )
    {
      iStartX = cStruct.iBestX;
      iStartY = cStruct.iBestY;
      cStruct.uiBestDistance = 0;
      cStruct.ucPointNr = 0;
      for ( iDist = 1; iDist < iSearchRange + 1; iDist*=2 )
      {
        if ( bStarRefinementDiamond == 1 )
        {
          xTZ8PointDiamondSearch ( cStruct, iStartX, iStartY, iDist, bStarRefinementCornersForDiamondDist1 );
        }
        else
        {
          xTZ8PointSquareSearch  ( cStruct, iStartX, iStartY, iDist );
        }
        if ( bStarRefinementStop && (cStruct.uiBestRound >= uiStarRefinementRounds) ) // stop criterion
        {
          break;
        }
      }

      // calculate only 2 missing points instead 8 points if cStrukt.uiBestDistance == 1
      if ( cStruct.uiBestDistance == 1 )
      {
        cStruct.uiBestDistance = 0;
        if ( cStruct.ucPointNr != 0 )
        {
          xTZ2PointSearch( cStruct );
        }
      }
    }
  }

  // write out best match
  rcMv.set( cStruct.iBestX, cStruct.iBestY );
  ruiSAD = cStruct.uiBestSad - m_pcRdCost->getCostOfVectorWithPredictor( cStruct.iBestX, cStruct.iBestY, cStruct.imvShift );
}

void InterSearch::xPatternSearchIntRefine(CodingUnit& cu, TZSearchStruct&  cStruct, Mv& rcMv, Mv& rcMvPred, int& riMVPIdx, uint32_t& ruiBits, Distortion& ruiCost, const AMVPInfo& amvpInfo, double fWeight)
{

  CHECK( cu.imv == IMV_OFF || cu.imv == IMV_HPEL , "xPatternSearchIntRefine(): Sub-pel MV used.");
  CHECK( amvpInfo.mvCand[riMVPIdx] != rcMvPred, "xPatternSearchIntRefine(): MvPred issue.");

  m_pcRdCost->setDistParam(m_cDistParam, *cStruct.pcPatternKey, cStruct.piRefY, cStruct.iRefStride, m_lumaClpRng.bd, COMP_Y, 0, m_pcEncCfg->m_bUseHADME ? ( m_pcEncCfg->m_fastHad ? 2 : 1 ) : 0 );

  // -> set MV scale for cost calculation to QPEL (0)
  m_pcRdCost->setCostScale ( 0 );

  Distortion  uiDist, uiSATD = 0;
  Distortion  uiBestDist  = MAX_DISTORTION;
  // subtract old MVP costs because costs for all newly tested MVPs are added in here
  ruiBits -= m_auiMVPIdxCost[riMVPIdx][AMVP_MAX_NUM_CANDS];

  Mv cBestMv = rcMv;
  Mv cBaseMvd[2];
  int iBestBits = 0;
  int iBestMVPIdx = riMVPIdx;
  Mv testPos[9] = { { 0, 0}, { -1, -1},{ -1, 0},{ -1, 1},{ 0, -1},{ 0, 1},{ 1, -1},{ 1, 0},{ 1, 1} };


  cBaseMvd[0] = (rcMv - amvpInfo.mvCand[0]);
  cBaseMvd[1] = (rcMv - amvpInfo.mvCand[1]);
  CHECK( (cBaseMvd[0].hor & 0x03) != 0 || (cBaseMvd[0].ver & 0x03) != 0 , "xPatternSearchIntRefine(): AMVP cand 0 Mvd issue.");
  CHECK( (cBaseMvd[1].hor & 0x03) != 0 || (cBaseMvd[1].ver & 0x03) != 0 , "xPatternSearchIntRefine(): AMVP cand 1 Mvd issue.");

  cBaseMvd[0].roundTransPrecInternal2Amvr(cu.imv);
  cBaseMvd[1].roundTransPrecInternal2Amvr(cu.imv);

  // test best integer position and all 8 neighboring positions
  for (int pos = 0; pos < 9; pos ++)
  {
    Mv cTestMv[2];
    // test both AMVP candidates for each position
    for (int iMVPIdx = 0; iMVPIdx < amvpInfo.numCand; iMVPIdx++)
    {
      cTestMv[iMVPIdx] = testPos[pos];
      cTestMv[iMVPIdx].changeTransPrecAmvr2Internal(cu.imv);
      cTestMv[iMVPIdx] += cBaseMvd[iMVPIdx];
      cTestMv[iMVPIdx] += amvpInfo.mvCand[iMVPIdx];

      if( m_pcEncCfg->m_ifpLines && !CU::isMvInRangeFPP( cu.ly(), cu.lheight(), cTestMv[iMVPIdx].ver, m_pcEncCfg->m_ifpLines, *cu.cs->pcv ) )
      {
        xClipMvToFppLine( cTestMv[iMVPIdx], cu.ly(), cu.lheight(), m_pcEncCfg->m_ifpLines, *cu.cs->pcv );
        cTestMv[iMVPIdx].roundTransPrecInternal2AmvrVertical(cu.imv);
      }

      if ( iMVPIdx == 0 || cTestMv[0] != cTestMv[1])
      {
        Mv cTempMV = cTestMv[iMVPIdx];
        clipMv(cTempMV, cu.lumaPos(), cu.lumaSize(), *cu.cs->pcv);
        m_cDistParam.cur.buf = cStruct.piRefY  + cStruct.iRefStride * (cTempMV.ver >>  MV_FRACTIONAL_BITS_INTERNAL) + (cTempMV.hor >> MV_FRACTIONAL_BITS_INTERNAL);
        uiDist = uiSATD = (Distortion) (m_cDistParam.distFunc( m_cDistParam ) * fWeight);
      }
      else
      {
        uiDist = uiSATD;
      }

      int iMvBits = m_auiMVPIdxCost[iMVPIdx][AMVP_MAX_NUM_CANDS];
      Mv pred = amvpInfo.mvCand[iMVPIdx];
      pred.changeTransPrecInternal2Amvr(cu.imv);
      m_pcRdCost->setPredictor( pred );
      Mv mv = cTestMv[iMVPIdx];
      mv.changeTransPrecInternal2Amvr(cu.imv);
      iMvBits += m_pcRdCost->getBitsOfVectorWithPredictor( mv.hor, mv.ver, 0 );
      uiDist += m_pcRdCost->getCost(iMvBits);

      if (uiDist < uiBestDist)
      {
        uiBestDist = uiDist;
        cBestMv = cTestMv[iMVPIdx];
        iBestMVPIdx = iMVPIdx;
        iBestBits = iMvBits;
      }
    }
  }
  if( uiBestDist == MAX_DISTORTION )
  {
    ruiCost = MAX_DISTORTION;
    return;
  }

  rcMv = cBestMv;
  rcMvPred = amvpInfo.mvCand[iBestMVPIdx];
  riMVPIdx = iBestMVPIdx;
  m_pcRdCost->setPredictor( rcMvPred );

  ruiBits += iBestBits;
  // taken from JEM 5.0
  // verify since it makes no sence to subtract Lamda*(Rmvd+Rmvpidx) from D+Lamda(Rmvd)
  // this would take the rate for the MVP idx out of the cost calculation
  // however this rate is always 1 so impact is small
  ruiCost = uiBestDist - m_pcRdCost->getCost(iBestBits) + m_pcRdCost->getCost(ruiBits);
  // taken from JEM 5.0
  // verify since it makes no sense to add rate for MVDs twicce

  return;
}

void InterSearch::xPatternSearchFracDIF(
  const CodingUnit& cu,
  RefPicList            refPicList,
  int                   iRefIdx,
  TZSearchStruct&    cStruct,
  const Mv&             rcMvInt,
  Mv&                   rcMvHalf,
  Mv&                   rcMvQter,
  Distortion&           ruiCost
)
{
  PROFILER_SCOPE_AND_STAGE( 0, _TPROF, P_FRAC_PEL );

  //  Reference pattern initialization (integer scale)
  int         iOffset    = rcMvInt.hor + rcMvInt.ver * cStruct.iRefStride;
  CPelBuf cPatternRoi(cStruct.piRefY + iOffset, cStruct.iRefStride, *cStruct.pcPatternKey);

  //  Half-pel refinement
  m_pcRdCost->setCostScale(1);
  if( 0 == m_pcEncCfg->m_fastSubPel )
  {
    xExtDIFUpSamplingH( &cPatternRoi, cStruct.useAltHpelIf );
  }

  rcMvHalf = rcMvInt;   rcMvHalf <<= 1;    // for mv-cost
  Mv baseRefMv(0, 0);
  Distortion  uiDistBest = MAX_DISTORTION;
  int patternId = 41;
  ruiCost = xPatternRefinement( cStruct.pcPatternKey, baseRefMv, 2, rcMvHalf, uiDistBest, patternId, &cPatternRoi, cStruct.useAltHpelIf );
  patternId -= ( m_pcEncCfg->m_fastSubPel == 1 ? 41 : 0 );


  //  quarter-pel refinement
  if( cStruct.imvShift == IMV_OFF && 0 != patternId )
  {
    PROFILER_SCOPE_AND_STAGE( 0, _TPROF, P_QPEL );
    m_pcRdCost->setCostScale( 0 );
    xExtDIFUpSamplingQ( &cPatternRoi, rcMvHalf, patternId );
    baseRefMv = rcMvHalf;
    baseRefMv <<= 1;

    rcMvQter = rcMvInt;    rcMvQter <<= 1;    // for mv-cost
    rcMvQter += rcMvHalf;  rcMvQter <<= 1;
    ruiCost = xPatternRefinement( cStruct.pcPatternKey, baseRefMv, 1, rcMvQter, uiDistBest, patternId, &cPatternRoi, cStruct.useAltHpelIf );
  }

}

Distortion InterSearch::xGetSymCost( const CodingUnit& cu, CPelUnitBuf& origBuf, RefPicList eCurRefPicList, const MvField& cCurMvField, MvField& cTarMvField, int BcwIdx )
{
  Distortion cost = MAX_DISTORTION;
  RefPicList eTarRefPicList = (RefPicList)(1 - (int)eCurRefPicList);

  // get prediction of eCurRefPicList
  PelUnitBuf  predBufA  = m_tmpPredStorage[eCurRefPicList].getCompactBuf( cu );
  const Picture* picRefA = cu.slice->getRefPic( eCurRefPicList, cCurMvField.refIdx );
  Mv mvA = cCurMvField.mv;
  clipMv( mvA, cu.lumaPos(), cu.lumaSize(), *cu.cs->pcv );
  xPredInterBlk( COMP_Y, cu, picRefA, mvA, predBufA, false, cu.slice->clpRngs[ COMP_Y ], false, false );

  // get prediction of eTarRefPicList
  PelUnitBuf predBufB = m_tmpPredStorage[eTarRefPicList].getCompactBuf( cu );
  const Picture* picRefB = cu.slice->getRefPic( eTarRefPicList, cTarMvField.refIdx );
  Mv mvB = cTarMvField.mv;
  clipMv( mvB, cu.lumaPos(), cu.lumaSize(), *cu.cs->pcv );
  xPredInterBlk( COMP_Y, cu, picRefB, mvB, predBufB, false, cu.slice->clpRngs[ COMP_Y ], false, false );

  PelUnitBuf bufTmp = m_tmpStorageLCU.getCompactBuf( cu );
  bufTmp.copyFrom( origBuf );
  bufTmp.removeHighFreq( predBufA, m_pcEncCfg->m_bClipForBiPredMeEnabled, cu.slice->clpRngs/*, getBcwWeight( cu.BcwIdx, eTarRefPicList )*/ );
  double fWeight = xGetMEDistortionWeight( cu.BcwIdx, eTarRefPicList );

  // calc distortion
  cost = ( Distortion ) floor( fWeight * ( double ) m_pcRdCost->getDistPart( bufTmp.Y(), predBufB.Y(), cu.cs->sps->bitDepths[ CH_L ], COMP_Y, DF_HAD ) );

  return(cost);
}

Distortion InterSearch::xSymRefineMvSearch( CodingUnit& cu, CPelUnitBuf& origBuf, Mv& rcMvCurPred, Mv& rcMvTarPred, RefPicList refPicList, MvField& rCurMvField, 
                                            MvField& rTarMvField, Distortion uiMinCost, int SearchPattern, int nSearchStepShift, uint32_t uiMaxSearchRounds, int BcwIdx )
{
  const Mv mvSearchOffsetCross[4] = { Mv( 0 , 1 ) , Mv( 1 , 0 ) , Mv( 0 , -1 ) , Mv( -1 ,  0 ) };
  const Mv mvSearchOffsetSquare[8] = { Mv( -1 , 1 ) , Mv( 0 , 1 ) , Mv( 1 ,  1 ) , Mv( 1 ,  0 ) , Mv( 1 , -1 ) , Mv( 0 , -1 ) , Mv( -1 , -1 ) , Mv( -1 , 0 ) };
  const Mv mvSearchOffsetDiamond[8] = { Mv( 0 , 2 ) , Mv( 1 , 1 ) , Mv( 2 ,  0 ) , Mv( 1 , -1 ) , Mv( 0 , -2 ) , Mv( -1 , -1 ) , Mv( -2 ,  0 ) , Mv( -1 , 1 ) };
  const Mv mvSearchOffsetHexagon[6] = { Mv( 2 , 0 ) , Mv( 1 , 2 ) , Mv( -1 ,  2 ) , Mv( -2 ,  0 ) , Mv( -1 , -2 ) , Mv( 1 , -2 ) };

  int nDirectStart = 0, nDirectEnd = 0, nDirectRounding = 0, nDirectMask = 0;
  const Mv * pSearchOffset;
  if ( SearchPattern == 0 )
  {
    nDirectEnd = 3;
    nDirectRounding = 4;
    nDirectMask = 0x03;
    pSearchOffset = mvSearchOffsetCross;
  }
  else if ( SearchPattern == 1 )
  {
    nDirectEnd = 7;
    nDirectRounding = 8;
    nDirectMask = 0x07;
    pSearchOffset = mvSearchOffsetSquare;
  }
  else if ( SearchPattern == 2 )
  {
    nDirectEnd = 7;
    nDirectRounding = 8;
    nDirectMask = 0x07;
    pSearchOffset = mvSearchOffsetDiamond;
  }
  else if ( SearchPattern == 3 )
  {
    nDirectEnd = 5;
    pSearchOffset = mvSearchOffsetHexagon;
  }
  else
  {
    THROW( "Invalid search pattern" );
  }

  int nBestDirect;
  for ( uint32_t uiRound = 0; uiRound < uiMaxSearchRounds; uiRound++ )
  {
    Distortion roundZeroBestCost = MAX_DISTORTION;
    const int positionLut[ 8 ] = { 0, 2, 4, 6, 1, 3, 5, 7 };
    nBestDirect = -1;
    MvField mvCurCenter = rCurMvField;
    for ( int nIdx = nDirectStart; nIdx <= nDirectEnd; nIdx++ )
    {
      // terminate the search if none of the first four tested points hasn't provided improvement
      if( m_pcEncCfg->m_SMVD > 1 && 2 == SearchPattern && 0 == uiRound && 4 == nIdx && roundZeroBestCost > uiMinCost )
      {
        break;
      }
      int nDirect;
      if ( SearchPattern == 3 )
      {
        nDirect = nIdx < 0 ? nIdx + 6 : nIdx >= 6 ? nIdx - 6 : nIdx;
      }
      else
      {
        if( m_pcEncCfg->m_SMVD > 1 && 2 == SearchPattern && 0 == uiRound )
        {
          nDirect = positionLut[ ( nIdx + nDirectRounding ) & nDirectMask ];
        }
        else
        {
          nDirect = ( nIdx + nDirectRounding ) & nDirectMask;
        }
      }

      Mv mvOffset = pSearchOffset[nDirect];
      mvOffset <<= nSearchStepShift;
      MvField mvCand = mvCurCenter, mvPair;
      mvCand.mv += mvOffset;
      if( m_pcEncCfg->m_ifpLines && !CU::isMvInRangeFPP( cu.ly(), cu.lheight(), mvCand.mv.ver, m_pcEncCfg->m_ifpLines, *cu.cs->pcv ) )
      {
        continue; // Skip this pos
      }

      // get MVD cost
      Mv pred = rcMvCurPred;
      pred.changeTransPrecInternal2Amvr(cu.imv);
      m_pcRdCost->setPredictor( pred );
      m_pcRdCost->setCostScale( 0 );
      Mv mv = mvCand.mv;
      mv.changeTransPrecInternal2Amvr(cu.imv);
      uint32_t uiMvBits = m_pcRdCost->getBitsOfVectorWithPredictor( mv.hor, mv.ver, 0 );
      Distortion uiCost = m_pcRdCost->getCost( uiMvBits );

      // get MVD pair and set target MV
      mvPair.refIdx = rTarMvField.refIdx;
      mvPair.mv.set( rcMvTarPred.hor - (mvCand.mv.hor - rcMvCurPred.hor), rcMvTarPred.ver - (mvCand.mv.ver - rcMvCurPred.ver) );

      if( m_pcEncCfg->m_ifpLines && !CU::isMvInRangeFPP( cu.ly(), cu.lheight(), mvPair.mv.ver, m_pcEncCfg->m_ifpLines, *cu.cs->pcv ) )
      {
        continue; // Skip this pos
      }

      uiCost += xGetSymCost( cu, origBuf, refPicList, mvCand, mvPair, BcwIdx );
      if ( uiCost < uiMinCost )
      {
        uiMinCost = uiCost;
        rCurMvField = mvCand;
        rTarMvField = mvPair;
        nBestDirect = nDirect;
      }
      if ( m_pcEncCfg->m_SMVD > 1 && 2 == SearchPattern && 0 == uiRound && 4 > nIdx && uiCost < roundZeroBestCost)
      {
        roundZeroBestCost = uiCost;
      }
    }

    if ( nBestDirect == -1 )
    {
      break;
    }
    int nStep = 1;
    if( (SearchPattern == 1 || SearchPattern == 2) && m_pcEncCfg->m_SMVD <= 1 )
    {
      // test at most 3 points in fast presets
      nStep = 2 - ( nBestDirect & 0x01 );
    }
    nDirectStart = nBestDirect - nStep;
    nDirectEnd = nBestDirect + nStep;
  }

  return(uiMinCost);
}


void InterSearch::xSymMotionEstimation( CodingUnit& cu, CPelUnitBuf& origBuf, Mv& rcMvCurPred, Mv& rcMvTarPred, RefPicList refPicList, MvField& rCurMvField, MvField& rTarMvField, Distortion& ruiCost, int BcwIdx )
{
  // Refine Search
  int nSearchStepShift = MV_FRACTIONAL_BITS_DIFF;
  int nDiamondRound = 8;
  int nCrossRound = 1;

  nSearchStepShift += cu.imv == IMV_HPEL ? 1 : (cu.imv << 1);
  nDiamondRound >>= cu.imv;

  ruiCost = xSymRefineMvSearch( cu, origBuf, rcMvCurPred, rcMvTarPred, refPicList, rCurMvField, rTarMvField, ruiCost, 2, nSearchStepShift, nDiamondRound, BcwIdx );
  if( m_pcEncCfg->m_SMVD < 3 )
  {
    ruiCost = xSymRefineMvSearch( cu, origBuf, rcMvCurPred, rcMvTarPred, refPicList, rCurMvField, rTarMvField, ruiCost, 0, nSearchStepShift, nCrossRound, BcwIdx );
  }
}


/**
* \brief Generate half-sample interpolated block
*
* \param pattern Reference picture ROI
* \param biPred    Flag indicating whether block is for biprediction
*/
void InterSearch::xExtDIFUpSamplingH(CPelBuf* pattern, bool useAltHpelIf)
{
  PROFILER_SCOPE_AND_STAGE( 0, _TPROF, P_HPEL_INTERP );
  const ClpRng& clpRng = m_lumaClpRng;
  int width            = pattern->width;
  int height           = pattern->height;
  int srcStride        = pattern->stride;
  const int reduceTap = m_pcEncCfg->m_meReduceTap;

  int intStride = width + 1;
  int dstStride = width + 1;
  Pel* intPtr;
  Pel* dstPtr;
  int filterSize     = useAltHpelIf ? ( reduceTap >= 1 ? NTAPS_AFFINE : NTAPS_LUMA )
                                    : ( reduceTap == 1 ? NTAPS_AFFINE
                                                       : ( reduceTap == 0 ? NTAPS_LUMA : NTAPS_CHROMA ) );
  int halfFilterSize = ( filterSize >> 1 );
  const Pel *srcPtr  = pattern->buf - halfFilterSize * srcStride - 1;

  const ChromaFormat chFmt = m_currChromaFormat;

  // split the prediction with funny widths into power-of-2 and +1 parts for the sake of SIMD speed-up
  m_if.filterHor( COMP_Y, srcPtr,         srcStride, m_filteredBlockTmp[0][0]        , intStride, width, height + filterSize, 0 << MV_FRACTIONAL_BITS_DIFF, false, chFmt, clpRng, useAltHpelIf, 0, reduceTap );
  m_if.filterHor( COMP_Y, srcPtr + width, srcStride, m_filteredBlockTmp[0][0] + width, intStride,     1, height + filterSize, 0 << MV_FRACTIONAL_BITS_DIFF, false, chFmt, clpRng, useAltHpelIf, 0, reduceTap );

  // split the prediction with funny widths into power-of-2 and +1 parts for the sake of SIMD speed-up
  m_if.filterHor( COMP_Y, srcPtr,         srcStride, m_filteredBlockTmp[2][0],         intStride, width, height + filterSize, 2 << MV_FRACTIONAL_BITS_DIFF, false, chFmt, clpRng, useAltHpelIf, 0, reduceTap );
  m_if.filterHor( COMP_Y, srcPtr + width, srcStride, m_filteredBlockTmp[2][0] + width, intStride,     1, height + filterSize, 2 << MV_FRACTIONAL_BITS_DIFF, false, chFmt, clpRng, useAltHpelIf, 0, reduceTap );

  intPtr = m_filteredBlockTmp[0][0] + halfFilterSize * intStride + 1;
  dstPtr = m_filteredBlock[0][0][0];
  m_if.filterVer( COMP_Y, intPtr, intStride, dstPtr, dstStride, width + 0, height + 0, 0 << MV_FRACTIONAL_BITS_DIFF, false, true, chFmt, clpRng, useAltHpelIf, 0, reduceTap );

  intPtr = m_filteredBlockTmp[0][0] + (halfFilterSize - 1) * intStride + 1;
  dstPtr = m_filteredBlock[2][0][0];
  m_if.filterVer( COMP_Y, intPtr, intStride, dstPtr, dstStride, width + 0, height + 1, 2 << MV_FRACTIONAL_BITS_DIFF, false, true, chFmt, clpRng, useAltHpelIf, 0, reduceTap );

  intPtr = m_filteredBlockTmp[2][0] + halfFilterSize * intStride;
  dstPtr = m_filteredBlock[0][2][0];
  // split the prediction with funny widths into power-of-2 and +1 parts for the sake of SIMD speed-up
  m_if.filterVer( COMP_Y, intPtr,         intStride, dstPtr,         dstStride, width, height + 0, 0 << MV_FRACTIONAL_BITS_DIFF, false, true, chFmt, clpRng, useAltHpelIf, 0, reduceTap );
  m_if.filterVer( COMP_Y, intPtr + width, intStride, dstPtr + width, dstStride,     1, height + 0, 0 << MV_FRACTIONAL_BITS_DIFF, false, true, chFmt, clpRng, useAltHpelIf, 0, reduceTap );

  intPtr = m_filteredBlockTmp[2][0] + (halfFilterSize - 1) * intStride;
  dstPtr = m_filteredBlock[2][2][0];
  // split the prediction with funny widths into power-of-2 and +1 parts for the sake of SIMD speed-up
  m_if.filterVer( COMP_Y, intPtr,         intStride, dstPtr,         dstStride, width, height + 1, 2 << MV_FRACTIONAL_BITS_DIFF, false, true, chFmt, clpRng, useAltHpelIf, 0, reduceTap );
  m_if.filterVer( COMP_Y, intPtr + width, intStride, dstPtr + width, dstStride,     1, height + 1, 2 << MV_FRACTIONAL_BITS_DIFF, false, true, chFmt, clpRng, useAltHpelIf, 0, reduceTap );
}





/**
* \brief Generate quarter-sample interpolated blocks
*
* \param pattern    Reference picture ROI
* \param halfPelRef Half-pel mv
* \param biPred     Flag indicating whether block is for biprediction
*/
void InterSearch::xExtDIFUpSamplingQ( CPelBuf* pattern, Mv halfPelRef, int& patternId )
{
  PROFILER_SCOPE_AND_STAGE( 0, _TPROF, P_QPEL_INTERP );
  const ClpRng& clpRng = m_lumaClpRng;
  int width      = pattern->width;
  int height     = pattern->height;
  int srcStride  = pattern->stride;
  const int reduceTap = m_pcEncCfg->m_meReduceTap;

  Pel const* srcPtr;
  int intStride = width + 1;
  int dstStride = width + 1;
  Pel* intPtr;
  Pel* dstPtr;

  int filterSize     = reduceTap == 1 ? NTAPS_AFFINE
                   : ( reduceTap == 0 ? NTAPS_LUMA : NTAPS_CHROMA );

  int halfFilterSize = (filterSize>>1);

  int extHeight = (halfPelRef.ver == 0) ? height + filterSize : height + filterSize-1;

  const ChromaFormat chFmt = m_currChromaFormat;

  if( s_doInterpQ[ patternId ][ 12 ] )
  {
    // Horizontal filter 1/4
    srcPtr = pattern->buf - halfFilterSize * srcStride - 1;
    intPtr = m_filteredBlockTmp[ 1 ][ 0 ];
    if( halfPelRef.ver > 0 )
    {
      srcPtr += srcStride;
    }
    if( halfPelRef.hor >= 0 )
    {
      srcPtr += 1;
    }
    m_if.filterHor( COMP_Y, srcPtr, srcStride, intPtr, intStride, width, extHeight, 1 << MV_FRACTIONAL_BITS_DIFF, false, chFmt, clpRng, false, 0, reduceTap );
  }

  if( s_doInterpQ[ patternId ][ 13 ] )
  {
    // Horizontal filter 3/4
    srcPtr = pattern->buf - halfFilterSize*srcStride - 1;
    intPtr = m_filteredBlockTmp[ 3 ][ 0 ];
    if( halfPelRef.ver > 0 )
    {
      srcPtr += srcStride;
    }
    if( halfPelRef.hor > 0 )
    {
      srcPtr += 1;
    }
    m_if.filterHor( COMP_Y, srcPtr, srcStride, intPtr, intStride, width, extHeight, 3 << MV_FRACTIONAL_BITS_DIFF, false, chFmt, clpRng, false, 0, reduceTap );
  }

  if( s_doInterpQ[ patternId ][ 3 ] )
  {
    // Generate @ 1,1
    intPtr = m_filteredBlockTmp[ 1 ][ 0 ] + ( halfFilterSize - 1 ) * intStride;
    dstPtr = m_filteredBlock[ 1 ][ 1 ][ 0 ];
    if( halfPelRef.ver == 0 )
    {
      intPtr += intStride;
    }
    m_if.filterVer( COMP_Y, intPtr, intStride, dstPtr, dstStride, width, height, 1 << MV_FRACTIONAL_BITS_DIFF, false, true, chFmt, clpRng, false, 0, reduceTap );
  }

  if( s_doInterpQ[ patternId ][ 11 ] )
  {
    // Generate @ 3,3
    intPtr = m_filteredBlockTmp[ 3 ][ 0 ] + ( halfFilterSize - 1 ) * intStride;
    dstPtr = m_filteredBlock[ 3 ][ 3 ][ 0 ];
    m_if.filterVer( COMP_Y, intPtr, intStride, dstPtr, dstStride, width, height, 3 << MV_FRACTIONAL_BITS_DIFF, false, true, chFmt, clpRng, false, 0, reduceTap );
  }

  if( s_doInterpQ[ patternId ][ 5 ] )
  {
    // Generate @ 3,1
    intPtr = m_filteredBlockTmp[ 1 ][ 0 ] + ( halfFilterSize - 1 ) * intStride;
    dstPtr = m_filteredBlock[ 3 ][ 1 ][ 0 ];
    m_if.filterVer( COMP_Y, intPtr, intStride, dstPtr, dstStride, width, height, 3 << MV_FRACTIONAL_BITS_DIFF, false, true, chFmt, clpRng, false, 0, reduceTap );
  }

  if( s_doInterpQ[ patternId ][ 9 ] )
  {
    // Generate @ 1,3
    intPtr = m_filteredBlockTmp[ 3 ][ 0 ] + ( halfFilterSize - 1 ) * intStride;
    dstPtr = m_filteredBlock[ 1 ][ 3 ][ 0 ];
    if( halfPelRef.ver == 0 )
    {
      intPtr += intStride;
    }
    m_if.filterVer( COMP_Y, intPtr, intStride, dstPtr, dstStride, width, height, 1 << MV_FRACTIONAL_BITS_DIFF, false, true, chFmt, clpRng, false, 0, reduceTap );
  }

  if (halfPelRef.ver != 0)
  {
    if( s_doInterpQ[ patternId ][ 4 ] )
    {
      // Generate @ 2,1
      intPtr = m_filteredBlockTmp[ 1 ][ 0 ] + ( halfFilterSize - 1 ) * intStride;
      dstPtr = m_filteredBlock[ 2 ][ 1 ][ 0 ];
      if( halfPelRef.ver == 0 )
      {
        intPtr += intStride;
      }
      m_if.filterVer( COMP_Y, intPtr, intStride, dstPtr, dstStride, width, height, 2 << MV_FRACTIONAL_BITS_DIFF, false, true, chFmt, clpRng, false, 0, reduceTap );
    }

    if( s_doInterpQ[ patternId ][ 10 ] )
    {
      // Generate @ 2,3
      intPtr = m_filteredBlockTmp[ 3 ][ 0 ] + ( halfFilterSize - 1 ) * intStride;
      dstPtr = m_filteredBlock[ 2 ][ 3 ][ 0 ];
      if( halfPelRef.ver == 0 )
      {
        intPtr += intStride;
      }
      m_if.filterVer( COMP_Y, intPtr, intStride, dstPtr, dstStride, width, height, 2 << MV_FRACTIONAL_BITS_DIFF, false, true, chFmt, clpRng, false, 0, reduceTap );
    }
  }
  else
  {
    if( s_doInterpQ[ patternId ][ 2 ] )
    {
      // Generate @ 0,1
      intPtr = m_filteredBlockTmp[ 1 ][ 0 ] + halfFilterSize * intStride;
      dstPtr = m_filteredBlock[ 0 ][ 1 ][ 0 ];
      m_if.filterVer( COMP_Y, intPtr, intStride, dstPtr, dstStride, width, height, 0 << MV_FRACTIONAL_BITS_DIFF, false, true, chFmt, clpRng, false, 0, reduceTap );
    }

    if( s_doInterpQ[ patternId ][ 8 ] )
    {
      // Generate @ 0,3
      intPtr = m_filteredBlockTmp[ 3 ][ 0 ] + halfFilterSize * intStride;
      dstPtr = m_filteredBlock[ 0 ][ 3 ][ 0 ];
      m_if.filterVer( COMP_Y, intPtr, intStride, dstPtr, dstStride, width, height, 0 << MV_FRACTIONAL_BITS_DIFF, false, true, chFmt, clpRng, false, 0, reduceTap );
    }
  }

  if (halfPelRef.hor != 0)
  {
    if( s_doInterpQ[ patternId ][ 6 ] )
    {
      // Generate @ 1,2
      intPtr = m_filteredBlockTmp[ 2 ][ 0 ] + ( halfFilterSize - 1 ) * intStride;
      dstPtr = m_filteredBlock[ 1 ][ 2 ][ 0 ];
      if( halfPelRef.hor > 0 )
      {
        intPtr += 1;
      }
      if( halfPelRef.ver >= 0 )
      {
        intPtr += intStride;
      }
      m_if.filterVer( COMP_Y, intPtr, intStride, dstPtr, dstStride, width, height, 1 << MV_FRACTIONAL_BITS_DIFF, false, true, chFmt, clpRng, false, 0, reduceTap );
    }

    if( s_doInterpQ[ patternId ][ 7 ] )
    {
      // Generate @ 3,2
      intPtr = m_filteredBlockTmp[ 2 ][ 0 ] + ( halfFilterSize - 1 ) * intStride;
      dstPtr = m_filteredBlock[ 3 ][ 2 ][ 0 ];
      if( halfPelRef.hor > 0 )
      {
        intPtr += 1;
      }
      if( halfPelRef.ver > 0 )
      {
        intPtr += intStride;
      }
      m_if.filterVer( COMP_Y, intPtr, intStride, dstPtr, dstStride, width, height, 3 << MV_FRACTIONAL_BITS_DIFF, false, true, chFmt, clpRng, false, 0, reduceTap );
    }
  }
  else
  {
    if( s_doInterpQ[ patternId ][ 0 ] )
    {
      // Generate @ 1,0
      intPtr = m_filteredBlockTmp[ 0 ][ 0 ] + ( halfFilterSize - 1 ) * intStride + 1;
      dstPtr = m_filteredBlock[ 1 ][ 0 ][ 0 ];
      if( halfPelRef.ver >= 0 )
      {
        intPtr += intStride;
      }
      m_if.filterVer( COMP_Y, intPtr, intStride, dstPtr, dstStride, width, height, 1 << MV_FRACTIONAL_BITS_DIFF, false, true, chFmt, clpRng, false, 0, reduceTap );
    }

    if( s_doInterpQ[ patternId ][ 1 ] )
    {
      // Generate @ 3,0
      intPtr = m_filteredBlockTmp[ 0 ][ 0 ] + ( halfFilterSize - 1 ) * intStride + 1;
      dstPtr = m_filteredBlock[ 3 ][ 0 ][ 0 ];
      if( halfPelRef.ver > 0 )
      {
        intPtr += intStride;
      }
      m_if.filterVer( COMP_Y, intPtr, intStride, dstPtr, dstStride, width, height, 3 << MV_FRACTIONAL_BITS_DIFF, false, true, chFmt, clpRng, false, 0, reduceTap );
    }
  }
}


void InterSearch::xEncodeInterResidualQT(CodingStructure &cs, Partitioner &partitioner, const ComponentID compID)
{
  const UnitArea& currArea    = partitioner.currArea();
  const TransformUnit& currTU = *cs.getTU(isLuma(partitioner.chType) ? currArea.lumaPos() : currArea.chromaPos(), partitioner.chType);
  const CodingUnit &cu        = *currTU.cu;
  const unsigned currDepth    = partitioner.currTrDepth;

  const bool bSubdiv          = currDepth != currTU.depth;

  if (compID == MAX_NUM_TBLOCKS)  // we are not processing a channel, instead we always recurse and code the CBFs
  {
    if( partitioner.canSplit( TU_MAX_TR_SPLIT, cs ) )
    {
      CHECK( !bSubdiv, "Not performing the implicit TU split" );
    }
    else if( cu.sbtInfo && partitioner.canSplit( CU::getSbtTuSplit( cu.sbtInfo ), cs ) )
    {
      CHECK( !bSubdiv, "Not performing the implicit TU split - sbt" );
    }
    else
    {
      CHECK( bSubdiv, "transformsplit not supported" );
    }

    CHECK(CU::isIntra(cu), "Inter search provided with intra CU");

    if( cu.chromaFormat != CHROMA_400
      && (!CU::isSepTree(cu) || isChroma(partitioner.chType))
      )
    {
      {
        {
          const bool  chroma_cbf = TU::getCbfAtDepth( currTU, COMP_Cb, currDepth );
          if (!(cu.sbtInfo && (currDepth == 0 || (currDepth == 1 && currTU.noResidual))))
          m_CABACEstimator->cbf_comp( cu, chroma_cbf, currArea.blocks[COMP_Cb], currDepth );
        }
        {
          const bool  chroma_cbf = TU::getCbfAtDepth( currTU, COMP_Cr, currDepth );
          if (!(cu.sbtInfo && (currDepth == 0 || (currDepth == 1 && currTU.noResidual))))
          m_CABACEstimator->cbf_comp( cu, chroma_cbf, currArea.blocks[COMP_Cr], currDepth, TU::getCbfAtDepth( currTU, COMP_Cb, currDepth ) );
        }
      }
    }

    if( !bSubdiv && !( cu.sbtInfo && currTU.noResidual )
      && !isChroma(partitioner.chType)
      )
    {
      m_CABACEstimator->cbf_comp( cu, TU::getCbfAtDepth( currTU, COMP_Y, currDepth ), currArea.Y(), currDepth );
    }
  }

  if (!bSubdiv)
  {
    if (compID != MAX_NUM_TBLOCKS) // we have already coded the CBFs, so now we code coefficients
    {
      if( currArea.blocks[compID].valid() )
      {
        if( compID == COMP_Cr )
        {
          const int cbfMask = ( TU::getCbf( currTU, COMP_Cb ) ? 2 : 0) + ( TU::getCbf( currTU, COMP_Cr ) ? 1 : 0 );
          m_CABACEstimator->joint_cb_cr( currTU, cbfMask );
        }
        if( TU::getCbf( currTU, compID ) )
        {
          m_CABACEstimator->residual_coding( currTU, compID );
        }
      }
    }
  }
  else
  {
    if( compID == MAX_NUM_TBLOCKS || TU::getCbfAtDepth( currTU, compID, currDepth ) )
    {
      if( partitioner.canSplit( TU_MAX_TR_SPLIT, cs ) )
      {
        partitioner.splitCurrArea( TU_MAX_TR_SPLIT, cs );
      }
      else if( cu.sbtInfo && partitioner.canSplit( CU::getSbtTuSplit( cu.sbtInfo ), cs ) )
      {
        partitioner.splitCurrArea( CU::getSbtTuSplit( cu.sbtInfo ), cs );
      }
      else
        THROW( "Implicit TU split not available!" );

      do
      {
        xEncodeInterResidualQT( cs, partitioner, compID );
      } while( partitioner.nextPart( cs ) );

      partitioner.exitCurrSplit();
    }
  }
}

void InterSearch::xCalcMinDistSbt( CodingStructure &cs, const CodingUnit& cu, const uint8_t sbtAllowed )
{
  if( !sbtAllowed )
  {
    m_estMinDistSbt[NUMBER_SBT_MODE] = 0;
    for( int comp = 0; comp < getNumberValidTBlocks( *cs.pcv ); comp++ )
    {
      const ComponentID compID = ComponentID( comp );
      CPelBuf pred = cs.getPredBuf( compID );
      CPelBuf org  = cs.getOrgBuf( compID );
      m_estMinDistSbt[NUMBER_SBT_MODE] += m_pcRdCost->getDistPart( org, pred, cs.sps->bitDepths[ toChannelType( compID ) ], compID, DF_SSE );
    }
    return;
  }

  //SBT fast algorithm 2.1 : estimate a minimum RD cost of a SBT mode based on the luma distortion of uncoded part and coded part (assuming distorted can be reduced to 1/16);
  //                         if this cost is larger than the best cost, no need to try a specific SBT mode
  int cuWidth  = cu.lwidth();
  int cuHeight = cu.lheight();
  int numPartX = cuWidth  >= 16 ? 4 : ( cuWidth  == 4 ? 1 : 2 );
  int numPartY = cuHeight >= 16 ? 4 : ( cuHeight == 4 ? 1 : 2 );
  Distortion dist[4][4];
  memset( dist, 0, sizeof( Distortion ) * 16 );

  for( uint32_t c = 0; c < getNumberValidTBlocks( *cs.pcv ); c++ )
  {
    const ComponentID compID   = ComponentID( c );
    const CompArea&   compArea = cu.blocks[compID];
    const CPelBuf orgPel  = cs.getOrgBuf( compArea );
    const CPelBuf predPel = cs.getPredBuf( compArea );
    int lengthX = compArea.width / numPartX;
    int lengthY = compArea.height / numPartY;
    static_assert( DISTORTION_PRECISION_ADJUSTMENT( 2 ) == 0, "the squared errors of the sub parts are not scaled" );

    //calc distY of 16 sub parts
    for( int j = 0; j < numPartY; j++ )
    {
      for( int i = 0; i < numPartX; i++ )
      {
        int posX = i * lengthX;
        int posY = j * lengthY;
        Distortion uiSum = g_pelBufOP.sumSquaredError( orgPel.bufAt( posX, posY ), orgPel.stride, predPel.bufAt( posX, posY ), predPel.stride, lengthX, lengthY );
        if( isChroma( compID ) )
        {
          uiSum = (Distortion)( uiSum * m_pcRdCost->getChromaWeight() );
        }
        dist[j][i] += uiSum;
      }
    }
  }

  //SSE of a CU
  m_estMinDistSbt[NUMBER_SBT_MODE] = 0;
  for( int j = 0; j < numPartY; j++ )
  {
    for( int i = 0; i < numPartX; i++ )
    {
      m_estMinDistSbt[NUMBER_SBT_MODE] += dist[j][i];
    }
  }
  //init per-mode dist
  for( int i = SBT_VER_H0; i < NUMBER_SBT_MODE; i++ )
  {
    m_estMinDistSbt[i] = MAX_DISTORTION;
  }

  //SBT fast algorithm 1: not try SBT if the residual is too small to compensate bits for encoding residual info
  uint64_t minNonZeroResiFracBits = 12 << SCALE_BITS;
  if( m_pcRdCost->calcRdCost( 0, m_estMinDistSbt[NUMBER_SBT_MODE] ) < m_pcRdCost->calcRdCost( minNonZeroResiFracBits, 0 ) )
  {
    m_skipSbtAll = true;
    return;
  }

  //derive estimated minDist of SBT = zero-residual part distortion + non-zero residual part distortion / 16
  int shift = 5;
  Distortion distResiPart = 0, distNoResiPart = 0;

  if( CU::targetSbtAllowed( SBT_VER_HALF, sbtAllowed ) )
  {
    int offsetResiPart = 0;
    int offsetNoResiPart = numPartX / 2;
    distResiPart = distNoResiPart = 0;
    assert( numPartX >= 2 );
    for( int j = 0; j < numPartY; j++ )
    {
      for( int i = 0; i < numPartX / 2; i++ )
      {
        distResiPart   += dist[j][i + offsetResiPart];
        distNoResiPart += dist[j][i + offsetNoResiPart];
      }
    }
    m_estMinDistSbt[SBT_VER_H0] = ( distResiPart >> shift ) + distNoResiPart;
    m_estMinDistSbt[SBT_VER_H1] = ( distNoResiPart >> shift ) + distResiPart;
  }

  if( CU::targetSbtAllowed( SBT_HOR_HALF, sbtAllowed ) )
  {
    int offsetResiPart = 0;
    int offsetNoResiPart = numPartY / 2;
    assert( numPartY >= 2 );
    distResiPart = distNoResiPart = 0;
    for( int j = 0; j < numPartY / 2; j++ )
    {
      for( int i = 0; i < numPartX; i++ )
      {
        distResiPart   += dist[j + offsetResiPart][i];
        distNoResiPart += dist[j + offsetNoResiPart][i];
      }
    }
    m_estMinDistSbt[SBT_HOR_H0] = ( distResiPart >> shift ) + distNoResiPart;
    m_estMinDistSbt[SBT_HOR_H1] = ( distNoResiPart >> shift ) + distResiPart;
  }

  if( CU::targetSbtAllowed( SBT_VER_QUAD, sbtAllowed ) )
  {
    assert( numPartX == 4 );
    m_estMinDistSbt[SBT_VER_Q0] = m_estMinDistSbt[SBT_VER_Q1] = 0;
    for( int j = 0; j < numPartY; j++ )
    {
      m_estMinDistSbt[SBT_VER_Q0] += dist[j][0] + ( ( dist[j][1] + dist[j][2] + dist[j][3] ) << shift );
      m_estMinDistSbt[SBT_VER_Q1] += dist[j][3] + ( ( dist[j][0] + dist[j][1] + dist[j][2] ) << shift );
    }
    m_estMinDistSbt[SBT_VER_Q0] = m_estMinDistSbt[SBT_VER_Q0] >> shift;
    m_estMinDistSbt[SBT_VER_Q1] = m_estMinDistSbt[SBT_VER_Q1] >> shift;
  }

  if( CU::targetSbtAllowed( SBT_HOR_QUAD, sbtAllowed ) )
  {
    assert( numPartY == 4 );
    m_estMinDistSbt[SBT_HOR_Q0] = m_estMinDistSbt[SBT_HOR_Q1] = 0;
    for( int i = 0; i < numPartX; i++ )
    {
      m_estMinDistSbt[SBT_HOR_Q0] += dist[0][i] + ( ( dist[1][i] + dist[2][i] + dist[3][i] ) << shift );
      m_estMinDistSbt[SBT_HOR_Q1] += dist[3][i] + ( ( dist[0][i] + dist[1][i] + dist[2][i] ) << shift );
    }
    m_estMinDistSbt[SBT_HOR_Q0] = m_estMinDistSbt[SBT_HOR_Q0] >> shift;
    m_estMinDistSbt[SBT_HOR_Q1] = m_estMinDistSbt[SBT_HOR_Q1] >> shift;
  }

  //SBT fast algorithm 5: try N SBT modes with the lowest distortion
  Distortion temp[NUMBER_SBT_MODE];
  memcpy( temp, m_estMinDistSbt, sizeof( Distortion ) * NUMBER_SBT_MODE );
  memset( m_sbtRdoOrder, 255, NUMBER_SBT_MODE );
  int startIdx = 0, numRDO;
  numRDO = CU::targetSbtAllowed( SBT_VER_HALF, sbtAllowed ) + CU::targetSbtAllowed( SBT_HOR_HALF, sbtAllowed );
  numRDO = std::min( ( numRDO << 1 ), SBT_NUM_RDO );
  for( int i = startIdx; i < startIdx + numRDO; i++ )
  {
    Distortion minDist = MAX_DISTORTION;
    for( int n = SBT_VER_H0; n <= SBT_HOR_H1; n++ )
    {
      if( temp[n] < minDist )
      {
        minDist = temp[n];
        m_sbtRdoOrder[i] = n;
      }
    }
    temp[m_sbtRdoOrder[i]] = MAX_DISTORTION;
  }

  startIdx += numRDO;
  numRDO = CU::targetSbtAllowed( SBT_VER_QUAD, sbtAllowed ) + CU::targetSbtAllowed( SBT_HOR_QUAD, sbtAllowed );
  numRDO = std::min( ( numRDO << 1 ), SBT_NUM_RDO );
  for( int i = startIdx; i < startIdx + numRDO; i++ )
  {
    Distortion minDist = MAX_DISTORTION;
    for( int n = SBT_VER_Q0; n <= SBT_HOR_Q1; n++ )
    {
      if( temp[n] < minDist )
      {
        minDist = temp[n];
        m_sbtRdoOrder[i] = n;
      }
    }
    temp[m_sbtRdoOrder[i]] = MAX_DISTORTION;
  }
}

uint8_t InterSearch::skipSbtByRDCost( int width, int height, int mtDepth, uint8_t sbtIdx, uint8_t sbtPos, double bestCost, Distortion distSbtOff, double costSbtOff, bool rootCbfSbtOff )
{
  int sbtMode = CU::getSbtMode( sbtIdx, sbtPos );

  //SBT fast algorithm 2.2 : estimate a minimum RD cost of a SBT mode based on the luma distortion of uncoded part and coded part (assuming distorted can be reduced to 1/16);
  //                         if this cost is larger than the best cost, no need to try a specific SBT mode
  if( m_pcRdCost->calcRdCost( 11 << SCALE_BITS, m_estMinDistSbt[sbtMode] ) > bestCost )
  {
    return 0; //early skip type 0
  }

  if( costSbtOff != MAX_DOUBLE )
  {
    if( !rootCbfSbtOff )
    {
      //SBT fast algorithm 3: skip SBT when the residual is too small (estCost is more accurate than fast algorithm 1, counting PU mode bits)
      uint64_t minNonZeroResiFracBits = 10 << SCALE_BITS;
      Distortion distResiPart;
      if( sbtIdx == SBT_VER_HALF || sbtIdx == SBT_HOR_HALF )
      {
        distResiPart = (Distortion)( ( ( m_estMinDistSbt[NUMBER_SBT_MODE] - m_estMinDistSbt[sbtMode] ) * 9 ) >> 4 );
      }
      else
      {
        distResiPart = (Distortion)( ( ( m_estMinDistSbt[NUMBER_SBT_MODE] - m_estMinDistSbt[sbtMode] ) * 3 ) >> 3 );
      }

      double estCost = ( costSbtOff - m_pcRdCost->calcRdCost( 0 << SCALE_BITS, distSbtOff ) ) + m_pcRdCost->calcRdCost( minNonZeroResiFracBits, m_estMinDistSbt[sbtMode] + distResiPart );
      if( estCost > costSbtOff )
      {
        return 1;
      }
      if( estCost > bestCost )
      {
        return 2;
      }
    }
    else
    {
      //SBT fast algorithm 4: skip SBT when an estimated RD cost is larger than the bestCost
      double weight = sbtMode > SBT_HOR_H1 ? 0.4 : 0.6;
      double estCost = ( ( costSbtOff - m_pcRdCost->calcRdCost( 0 << SCALE_BITS, distSbtOff ) ) * weight ) + m_pcRdCost->calcRdCost( 0 << SCALE_BITS, m_estMinDistSbt[sbtMode] );
      if( estCost > bestCost )
      {
        return 3;
      }
    }
  }
  return MAX_UCHAR;
}

void InterSearch::xEstimateInterResidualQT(CodingStructure &cs, Partitioner &partitioner, Distortion *puiZeroDist /*= NULL*/)
{
  const UnitArea& currArea = partitioner.currArea();
  const SPS &sps           = *cs.sps;

  const uint32_t numValidComp  = getNumberValidComponents( sps.chromaFormatIdc );
  const uint32_t numTBlocks    = getNumberValidTBlocks   ( *cs.pcv );
  CodingUnit& cu               = *cs.getCU(partitioner.chType, partitioner.treeType);
  const unsigned currDepth = partitioner.currTrDepth;
  const bool useTS = cs.picture->useTS;

  bool bCheckFull  = !partitioner.canSplit( TU_MAX_TR_SPLIT, cs );
  if( cu.sbtInfo && partitioner.canSplit( CU::getSbtTuSplit( cu.sbtInfo ), cs ) )
  {
    bCheckFull = false;
  }
  bool bCheckSplit = !bCheckFull;

  // get temporary data
  CodingStructure *csSplit = nullptr;
  CodingStructure *csFull  = nullptr;
  if (bCheckSplit)
  {
    csSplit = &cs;
  }
  else if (bCheckFull)
  {
    csFull = &cs;
  }

  Distortion uiSingleDist         = 0;
  Distortion uiSingleDistComp [3] = { 0, 0, 0 };

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

  PelUnitBuf    orgResiBuf;
  orgResiBuf = m_tmpStorageLCU.getCompactBuf( currArea );
  orgResiBuf.copyFrom(cs.getResiBuf(currArea));

  if (bCheckFull)
  {
    TransformUnit& tu = csFull->addTU(CS::getArea(cs, currArea, partitioner.chType, partitioner.treeType), partitioner.chType, &cu);
    tu.depth          = currDepth;
    tu.mtsIdx[COMP_Y] = MTS_DCT2_DCT2;
    tu.checkTuNoResidual( partitioner.currPartIdx() );

    double minCost [MAX_NUM_TBLOCKS];

    m_CABACEstimator->resetBits();

    memset(m_pTempPel, 0, sizeof(Pel) * tu.Y().area()); // not necessary needed for inside of recursion (only at the beginning)

    for (uint32_t i = 0; i < numTBlocks; i++)
    {
      minCost[i] = MAX_DOUBLE;
    }

    CodingStructure &saveCS = *m_pSaveCS[1];
    saveCS.pcv     = cs.pcv;
    saveCS.picture = cs.picture;
    saveCS.area.repositionTo( currArea );

    TransformUnit& bestTU = saveCS.tus.empty() ? saveCS.addTU( currArea, partitioner.chType, nullptr ) : *saveCS.tus.front();
    bestTU.initData();
    bestTU.UnitArea::operator=( currArea );

    for( uint32_t c = 0; c < numTBlocks; c++ )
    {
      const ComponentID compID    = ComponentID(c);
      const CompArea&   compArea  = tu.blocks[compID];
      const int channelBitDepth   = sps.bitDepths[toChannelType(compID)];

      if( !tu.blocks[compID].valid() )
      {
        continue;
      }
      bool tsAllowed = useTS && TU::isTSAllowed(tu, compID) && (isLuma(compID) || (isChroma(compID) && m_pcEncCfg->m_useChromaTS));
      if (isChroma(compID) && tsAllowed && (tu.mtsIdx[COMP_Y] != MTS_SKIP))
      {
        tsAllowed = false;
      }
      uint8_t nNumTransformCands = 1 + (tsAllowed ? 1 : 0); // DCT + TS = 2 tests
      TrModeList trModes;

      if (nNumTransformCands > 1)
      {
        trModes.push_back(TrMode(0, true)); //DCT2
        //for a SBT-no-residual TU, the RDO process should be called once, in order to get the RD cost
        if ( !tu.noResidual )
        {
          trModes.push_back(TrMode(1, true));
        }
        else
        {
          nNumTransformCands--;
        }
      }
      bool isLast = true;
      for (int transformMode = 0; transformMode < nNumTransformCands; transformMode++)
      {
        const bool isFirstMode = transformMode == 0;

        // copy the original residual into the residual buffer
        csFull->getResiBuf(compArea).copyFrom(orgResiBuf.get(compID));


        m_CABACEstimator->getCtx() = ctxStart;
        m_CABACEstimator->resetBits();

        if (bestTU.mtsIdx[compID] == MTS_SKIP && m_pcEncCfg->m_TS)
        {
          continue;
        }
        tu.mtsIdx[compID] = transformMode ? trModes[transformMode].first : 0;

        const QpParam cQP(tu, compID);  // note: uses tu.transformSkip[compID]
        m_pcTrQuant->selectLambda(compID);

        if ( sps.jointCbCr && isChroma( compID ) && ( tu.cu->cs->slice->sliceQp > 18 ) )
        {
          m_pcTrQuant->scaleLambda( 1.05 );
        }
        TCoeff     currAbsSum = 0;
        uint64_t   currCompFracBits = 0;
        Distortion currCompDist = 0;
        double     currCompCost = 0;
        uint64_t   nonCoeffFracBits = 0;
        Distortion nonCoeffDist = 0;
        double     nonCoeffCost = 0;

        if (nNumTransformCands > 1)
        {
          if (transformMode == 0)
          {
            m_pcTrQuant->checktransformsNxN(tu, &trModes, 2, compID);
            tu.mtsIdx[compID] = trModes[0].first;
            if (!trModes[transformMode + 1].second)
            {
              nNumTransformCands = 1;
            }
          }
          m_pcTrQuant->transformNxN(tu, compID, cQP, currAbsSum, m_CABACEstimator->getCtx(), true);
        }
        else
        {
          m_pcTrQuant->transformNxN(tu, compID, cQP, currAbsSum, m_CABACEstimator->getCtx());
        }
        if (isFirstMode || (currAbsSum == 0))
        {
          const CPelBuf zeroBuf(m_pTempPel, compArea);
          const CPelBuf& orgResi = orgResiBuf.get(compID);

          nonCoeffDist = m_pcRdCost->getDistPart(zeroBuf, orgResi, channelBitDepth, compID, DF_SSE); // initialized with zero residual distortion

          if (!tu.noResidual)
          {
            const bool prevCbf = (compID == COMP_Cr ? tu.cbf[COMP_Cb] : false);
            m_CABACEstimator->cbf_comp(*tu.cu, false, compArea, currDepth, prevCbf);
          }

          nonCoeffFracBits = m_CABACEstimator->getEstFracBits();
          nonCoeffCost = m_pcRdCost->calcRdCost(nonCoeffFracBits, nonCoeffDist, !m_pcEncCfg->m_lumaLevelToDeltaQPEnabled);
        }

        if ((puiZeroDist != NULL) && isFirstMode)
        {
          *puiZeroDist += nonCoeffDist; // initialized with zero residual distortion
        }

        if (currAbsSum > 0) //if non-zero coefficients are present, a residual needs to be derived for further prediction
        {
          if (isFirstMode)
          {
            m_CABACEstimator->getCtx() = ctxStart;
            m_CABACEstimator->resetBits();
          }

          const bool prevCbf = ( compID == COMP_Cr ? tu.cbf[COMP_Cb] : false );
          m_CABACEstimator->cbf_comp( *tu.cu, true, compArea, currDepth, prevCbf );
          if( compID == COMP_Cr )
          {
            const int cbfMask = ( tu.cbf[COMP_Cb] ? 2 : 0 ) + 1;
            m_CABACEstimator->joint_cb_cr( tu, cbfMask );
          }
          CUCtx cuCtx;
          cuCtx.isDQPCoded = true;
          cuCtx.isChromaQpAdjCoded = true;
          m_CABACEstimator->residual_coding(tu, compID, &cuCtx);
          m_CABACEstimator->mts_idx(cu, &cuCtx);

          currCompFracBits = m_CABACEstimator->getEstFracBits();

          PelBuf resiBuf  = csFull->getResiBuf(compArea);
          CPelBuf orgResi = orgResiBuf.get(compID);

          m_pcTrQuant->invTransformNxN(tu, compID, resiBuf, cQP);
          currCompDist = m_pcRdCost->getDistPart(orgResi, resiBuf, channelBitDepth, compID, DF_SSE);
          currCompCost = m_pcRdCost->calcRdCost(currCompFracBits, currCompDist, false);
        }
        else if (transformMode > 0)
        {
          currCompCost = MAX_DOUBLE;
        }
        else
        {
          currCompFracBits = nonCoeffFracBits;
          currCompDist     = nonCoeffDist;
          currCompCost     = nonCoeffCost;

          tu.cbf[compID] = 0;
        }

        // evaluate
        if ((currCompCost < minCost[compID]) || (transformMode == 1 && currCompCost == minCost[compID]))
        {
          // copy component
          if (isFirstMode && ((nonCoeffCost < currCompCost) || (currAbsSum == 0))) // check for forced null
          {
            tu.getCoeffs( compID ).fill( 0 );
            csFull->getResiBuf( compArea ).fill( 0 );
            tu.cbf[compID]   = 0;

            currAbsSum       = 0;
            currCompFracBits = nonCoeffFracBits;
            currCompDist     = nonCoeffDist;
            currCompCost     = nonCoeffCost;
          }

          uiSingleDistComp[compID] = currCompDist;
          minCost[compID]          = currCompCost;
          if (transformMode != (nNumTransformCands - 1))
          {
            bestTU.copyComponentFrom(tu, compID);
            saveCS.getResiBuf(compArea).copyFrom(csFull->getResiBuf(compArea));
          }
          else
          {
            isLast = false;
          }
        }
        if( tu.noResidual )
        {
          CHECK( currCompFracBits > 0 || currAbsSum, "currCompFracBits > 0 when tu noResidual" );
        }
      }
      if (isLast)
      {
        tu.copyComponentFrom(bestTU, compID);
        csFull->getResiBuf(compArea).copyFrom(saveCS.getResiBuf(compArea));
      }
    } // component loop

    if ( tu.blocks.size()>2 && tu.blocks[COMP_Cb].valid() )
    {
      const CompArea& cbArea = tu.blocks[COMP_Cb];
      const CompArea& crArea = tu.blocks[COMP_Cr];
      bool checkJointCbCr = (sps.jointCbCr) && (!tu.noResidual) && (TU::getCbf(tu, COMP_Cb) || TU::getCbf(tu, COMP_Cr));
      const int channelBitDepth = sps.bitDepths[toChannelType(COMP_Cb)];
      double minCostCbCr = minCost[COMP_Cb] + minCost[COMP_Cr];
      bool   isLastBest  = false;

      bool checkDCTOnly = m_pcEncCfg->m_useChromaTS && ((TU::getCbf(tu, COMP_Cb) && tu.mtsIdx[COMP_Cb] == MTS_DCT2_DCT2 && !TU::getCbf(tu, COMP_Cr)) ||
        (TU::getCbf(tu, COMP_Cr) && tu.mtsIdx[COMP_Cr] == MTS_DCT2_DCT2 && !TU::getCbf(tu, COMP_Cb)) ||
        (TU::getCbf(tu, COMP_Cb) && tu.mtsIdx[COMP_Cb] == MTS_DCT2_DCT2 && TU::getCbf(tu, COMP_Cr) && tu.mtsIdx[COMP_Cr] == MTS_DCT2_DCT2));
      bool checkTSOnly = m_pcEncCfg->m_useChromaTS && ((TU::getCbf(tu, COMP_Cb) && tu.mtsIdx[COMP_Cb] == MTS_SKIP && !TU::getCbf(tu, COMP_Cr)) ||
        (TU::getCbf(tu, COMP_Cr) && tu.mtsIdx[COMP_Cr] == MTS_SKIP && !TU::getCbf(tu, COMP_Cb)) ||
        (TU::getCbf(tu, COMP_Cb) && tu.mtsIdx[COMP_Cb] == MTS_SKIP && TU::getCbf(tu, COMP_Cr) && tu.mtsIdx[COMP_Cr] == MTS_SKIP));

      std::vector<int> jointCbfMasksToTest;
      if ( checkJointCbCr )
      {
        for( int i = 0; i < 4; i++ )
        {
          m_orgResiCb[i].compactResize(cbArea);
          m_orgResiCr[i].compactResize(crArea);
        }
        m_orgResiCb[0].copyFrom(orgResiBuf.Cb());
        m_orgResiCr[0].copyFrom(orgResiBuf.Cr());

        jointCbfMasksToTest = m_pcTrQuant->selectICTCandidates(tu, m_orgResiCb, m_orgResiCr);

        bestTU.copyComponentFrom(tu, COMP_Cb);
        bestTU.copyComponentFrom(tu, COMP_Cr);
        saveCS.getResiBuf(cbArea).copyFrom(csFull->getResiBuf(cbArea));
        saveCS.getResiBuf(crArea).copyFrom(csFull->getResiBuf(crArea));
      }

      for (int cbfMask: jointCbfMasksToTest)
      {
        ComponentID codeCompId = (cbfMask >> 1 ? COMP_Cb : COMP_Cr);
        ComponentID otherCompId = (codeCompId == COMP_Cr ? COMP_Cb : COMP_Cr);
        bool tsAllowed = useTS && TU::isTSAllowed(tu, codeCompId) && (m_pcEncCfg->m_useChromaTS);
        if (tsAllowed && (tu.mtsIdx[COMP_Y] != MTS_SKIP))
        {
          tsAllowed = false;
        }
        if (!tsAllowed)
        {
          checkTSOnly = false;
        }
        uint8_t     numTransformCands = 1 + (tsAllowed && (!(checkDCTOnly || checkTSOnly)) ? 1 : 0); // DCT + TS = 2 tests
        TrModeList trModes;
        if (numTransformCands > 1)
        {
          trModes.push_back(TrMode(0, true)); // DCT2
          trModes.push_back(TrMode(1, true));//TS
        }
        else
        {
          tu.mtsIdx[codeCompId] = checkTSOnly ? 1 : 0;
        }
        for (int modeId = 0; modeId < numTransformCands; modeId++)
        {
          TCoeff     currAbsSum = 0;
          uint64_t   currCompFracBits = 0;
          Distortion currCompDistCb = 0;
          Distortion currCompDistCr = 0;
          double     currCompCost = 0;

          tu.jointCbCr = (uint8_t)cbfMask;
          if (numTransformCands > 1)
          {
            tu.mtsIdx[codeCompId] = trModes[modeId].first;
          }
          tu.mtsIdx[otherCompId] = MTS_DCT2_DCT2;
          const QpParam cQP(tu, COMP_Cb);  // note: uses tu.transformSkip[compID]
          m_pcTrQuant->selectLambda(COMP_Cb);

          // Lambda is loosened for the joint mode with respect to single modes as the same residual is used for both chroma blocks
          const int    absIct = abs(TU::getICTMode(tu));
          const double lfact = (absIct == 1 || absIct == 3 ? 0.8 : 0.5);
          m_pcTrQuant->scaleLambda(lfact);
          if (checkJointCbCr && (tu.cu->cs->slice->sliceQp > 18))
          {
            m_pcTrQuant->scaleLambda(1.05);
          }

          m_CABACEstimator->getCtx() = ctxStart;
          m_CABACEstimator->resetBits();

          PelBuf cbResi = csFull->getResiBuf(cbArea);
          PelBuf crResi = csFull->getResiBuf(crArea);
          cbResi.copyFrom(m_orgResiCb[cbfMask]);
          crResi.copyFrom(m_orgResiCr[cbfMask]);

          int         codedCbfMask = 0;
          ComponentID codeCompId = (tu.jointCbCr >> 1 ? COMP_Cb : COMP_Cr);
          ComponentID otherCompId = (codeCompId == COMP_Cr ? COMP_Cb : COMP_Cr);
          const QpParam qpCbCr(tu, codeCompId);

          tu.getCoeffs(otherCompId).fill(0);   // do we need that?
          TU::setCbfAtDepth(tu, otherCompId, tu.depth, false);

          PelBuf& codeResi = (codeCompId == COMP_Cr ? crResi : cbResi);
          TCoeff  compAbsSum = 0;
          if (numTransformCands > 1)
          {
            if (modeId == 0)
            {
              m_pcTrQuant->checktransformsNxN(tu, &trModes, 2, codeCompId);
              tu.mtsIdx[codeCompId] = trModes[modeId].first;
              tu.mtsIdx[otherCompId] = MTS_DCT2_DCT2;
              if (!trModes[modeId + 1].second)
              {
                numTransformCands = 1;
              }
            }
            m_pcTrQuant->transformNxN(tu, codeCompId, qpCbCr, compAbsSum, m_CABACEstimator->getCtx(), true);
          }
          else
          {
            m_pcTrQuant->transformNxN(tu, codeCompId, qpCbCr, compAbsSum, m_CABACEstimator->getCtx());
          }
          if (compAbsSum > 0)
          {
            m_pcTrQuant->invTransformNxN(tu, codeCompId, codeResi, qpCbCr);
            codedCbfMask += (codeCompId == COMP_Cb ? 2 : 1);
          }
          else
          {
            codeResi.fill(0);
          }

          if (tu.jointCbCr == 3 && codedCbfMask == 2)
          {
            codedCbfMask = 3;
            TU::setCbfAtDepth(tu, COMP_Cr, tu.depth, true);
          }
          if (codedCbfMask && tu.jointCbCr != codedCbfMask)
          {
            codedCbfMask = 0;
          }
          currAbsSum = codedCbfMask;
          if (!tu.mtsIdx[codeCompId])
          {
            numTransformCands = (currAbsSum <= 0) ? 1 : numTransformCands;
          }
          if (currAbsSum > 0)
          {
            m_CABACEstimator->cbf_comp(*tu.cu, codedCbfMask >> 1, cbArea, currDepth, false);
            m_CABACEstimator->cbf_comp(*tu.cu, codedCbfMask & 1, crArea, currDepth, codedCbfMask >> 1);
            m_CABACEstimator->joint_cb_cr(tu, codedCbfMask);
            if (codedCbfMask >> 1)
              m_CABACEstimator->residual_coding(tu, COMP_Cb);
            if (codedCbfMask & 1)
              m_CABACEstimator->residual_coding(tu, COMP_Cr);
            currCompFracBits = m_CABACEstimator->getEstFracBits();

            m_pcTrQuant->invTransformICT(tu, cbResi, crResi);

            currCompDistCb = m_pcRdCost->getDistPart(orgResiBuf.Cb(), cbResi, channelBitDepth, COMP_Cb, DF_SSE);
            currCompDistCr = m_pcRdCost->getDistPart(orgResiBuf.Cr(), crResi, channelBitDepth, COMP_Cr, DF_SSE);
            currCompCost = m_pcRdCost->calcRdCost(currCompFracBits, currCompDistCr + currCompDistCb, false);
          }
          else
            currCompCost = MAX_DOUBLE;

          // evaluate
          if (currCompCost < minCostCbCr)
          {
            uiSingleDistComp[COMP_Cb] = currCompDistCb;
            uiSingleDistComp[COMP_Cr] = currCompDistCr;
            minCostCbCr = currCompCost;
            isLastBest = (cbfMask == jointCbfMasksToTest.back()) && (modeId == (numTransformCands - 1));
            if (!isLastBest)
            {
              bestTU.copyComponentFrom(tu, COMP_Cb);
              bestTU.copyComponentFrom(tu, COMP_Cr);
              saveCS.getResiBuf(cbArea).copyFrom(csFull->getResiBuf(cbArea));
              saveCS.getResiBuf(crArea).copyFrom(csFull->getResiBuf(crArea));
            }
          }
        }

        if( !isLastBest )
        {
          // copy component
          tu.copyComponentFrom( bestTU, COMP_Cb );
          tu.copyComponentFrom( bestTU, COMP_Cr );
          csFull->getResiBuf( cbArea ).copyFrom( saveCS.getResiBuf( cbArea ) );
          csFull->getResiBuf( crArea ).copyFrom( saveCS.getResiBuf( crArea ) );
        }
      }
    }

    m_CABACEstimator->getCtx() = ctxStart;
    m_CABACEstimator->resetBits();
    if( !tu.noResidual )
    {
      static const ComponentID cbf_getComp[3] = { COMP_Cb, COMP_Cr, COMP_Y };
      for( unsigned c = 0; c < numTBlocks; c++)
      {
        const ComponentID compID = numTBlocks>1 ? cbf_getComp[c] : COMP_Y;
        if( tu.blocks[compID].valid() )
        {
          const bool prevCbf = ( compID == COMP_Cr ? TU::getCbfAtDepth( tu, COMP_Cb, currDepth ) : false );
          m_CABACEstimator->cbf_comp( *tu.cu, TU::getCbfAtDepth( tu, compID, currDepth ), tu.blocks[compID], currDepth, prevCbf );
        }
      }
    }

    for (uint32_t ch = 0; ch < numValidComp; ch++)
    {
      const ComponentID compID = ComponentID(ch);
      if (tu.blocks[compID].valid())
      {
        if( compID == COMP_Cr )
        {
          const int cbfMask = ( TU::getCbf( tu, COMP_Cb ) ? 2 : 0 ) + ( TU::getCbf( tu, COMP_Cr ) ? 1 : 0 );
          m_CABACEstimator->joint_cb_cr(tu, cbfMask);
        }
        if( TU::getCbf( tu, compID ) )
        {
          m_CABACEstimator->residual_coding( tu, compID );
        }
        uiSingleDist += uiSingleDistComp[compID];
      }
    }
    if( tu.noResidual )
    {
      CHECK( m_CABACEstimator->getEstFracBits() > 0, "no residual TU's bits shall be 0" );
    }

    csFull->fracBits += m_CABACEstimator->getEstFracBits();
    csFull->dist     += uiSingleDist;
    csFull->cost      = m_pcRdCost->calcRdCost(csFull->fracBits, csFull->dist, !m_pcEncCfg->m_lumaLevelToDeltaQPEnabled);
  } // check full

  // code sub-blocks
  if( bCheckSplit )
  {
    if( bCheckFull )
    {
      m_CABACEstimator->getCtx() = ctxStart;
    }

    if( partitioner.canSplit( TU_MAX_TR_SPLIT, cs ) )
    {
      partitioner.splitCurrArea( TU_MAX_TR_SPLIT, cs );
    }
    else if( cu.sbtInfo && partitioner.canSplit( CU::getSbtTuSplit( cu.sbtInfo ), cs ) )
    {
      partitioner.splitCurrArea( CU::getSbtTuSplit( cu.sbtInfo ), cs );
    }
    else
      THROW( "Implicit TU split not available!" );

    do
    {
      xEstimateInterResidualQT(*csSplit, partitioner, bCheckFull ? nullptr : puiZeroDist );

      csSplit->cost = m_pcRdCost->calcRdCost( csSplit->fracBits, csSplit->dist );
    } while( partitioner.nextPart( *csSplit ) );

    partitioner.exitCurrSplit();

    unsigned        compCbf[3]  = { 0, 0, 0 };

    if( !bCheckFull )
    {
      for( auto &currTU : csSplit->traverseTUs( currArea, partitioner.chType ) )
      {
        for( unsigned ch = 0; ch < numTBlocks; ch++ )
        {
          compCbf[ ch ] |= ( TU::getCbfAtDepth( currTU, ComponentID(ch), currDepth + 1 ) ? 1 : 0 );
        }
      }

      for( auto &currTU : csSplit->traverseTUs( currArea, partitioner.chType ) )
      {
        TU::setCbfAtDepth   ( currTU, COMP_Y,  currDepth, compCbf[ COMP_Y  ] );
        if( currArea.chromaFormat != CHROMA_400 )
        {
          TU::setCbfAtDepth ( currTU, COMP_Cb, currDepth, compCbf[ COMP_Cb ] );
          TU::setCbfAtDepth ( currTU, COMP_Cr, currDepth, compCbf[ COMP_Cr ] );
        }
      }

      m_CABACEstimator->getCtx() = ctxStart;
      m_CABACEstimator->resetBits();

      // when compID isn't a channel, code Cbfs:
      xEncodeInterResidualQT( *csSplit, partitioner, MAX_NUM_TBLOCKS );

      for (uint32_t ch = 0; ch < numValidComp; ch++)
      {
        const ComponentID compID = ComponentID(ch);
        xEncodeInterResidualQT( *csSplit, partitioner, compID );
      }

      csSplit->fracBits = m_CABACEstimator->getEstFracBits();
      csSplit->cost     = m_pcRdCost->calcRdCost(csSplit->fracBits, csSplit->dist);
    }
  }
}

void InterSearch::encodeResAndCalcRdInterCU(CodingStructure &cs, Partitioner &partitioner, const bool skipResidual )
{
  CodingUnit &cu = *cs.getCU( partitioner.chType, partitioner.treeType );
  bool luma      = true;
  bool chroma    = cs.pcv->chrFormat != VVENC_CHROMA_400;
  if( cu.predMode == MODE_IBC )
  {
    luma    = !cu.mccNoLuma  ();
    chroma &= !cu.mccNoChroma();
  }
  if( cu.predMode == MODE_INTER )
    CHECK( CU::isSepTree(cu), "CU with Inter mode must be in single tree" );

  const ChromaFormat format      = cs.area.chromaFormat;;
  const int  numValidComponents  = getNumberValidComponents(format);
  const SPS &sps                 = *cs.sps;

  if( skipResidual ) //  No residual coding : SKIP mode
  {
    cu.skip    = true;
    cu.rootCbf = false;
    CHECK( cu.sbtInfo != 0, "sbtInfo shall be 0 if CU has no residual" );
    cs.getResiBuf().fill(0);
    cs.getRecoBuf().copyFrom(cs.getPredBuf() );

    // add new "empty" TU(s) spanning the whole CU
    cs.addEmptyTUs( partitioner, &cu );
    Distortion distortion = 0;

    for (int comp = 0; comp < numValidComponents; comp++)
    {
      const ComponentID compID = ComponentID(comp);
      if (compID == COMP_Y && !luma)
        continue;
      if (compID != COMP_Y && !chroma)
        continue;
      CPelBuf reco = cs.getRecoBuf (compID);
      CPelBuf org  = cs.getOrgBuf  (compID);

      distortion  += m_pcRdCost->getDistPart( org, reco, sps.bitDepths[ toChannelType( compID ) ], compID, DF_SSE );
    }

    CodingUnit& cu = *cs.getCU(partitioner.chType, TREE_D);
    m_CABACEstimator->resetBits();
    m_CABACEstimator->cu_skip_flag  ( cu );
    m_CABACEstimator->merge_data(cu);
    cs.fracBits = m_CABACEstimator->getEstFracBits();
    cs.dist     = distortion;
    cs.cost     = m_pcRdCost->calcRdCost(cs.fracBits, cs.dist);

    return;
  }

  //  Residual coding.
  if (luma)
  {
    cs.getResiBuf(COMP_Y).subtract(cs.getOrgBuf(COMP_Y), cs.getPredBuf(COMP_Y));
  }
  if (chroma)
  {
    cs.getResiBuf(COMP_Cb).subtract(cs.getOrgBuf(COMP_Cb), cs.getPredBuf(COMP_Cb));
    cs.getResiBuf(COMP_Cr).subtract(cs.getOrgBuf(COMP_Cr), cs.getPredBuf(COMP_Cr));
  }

  Distortion zeroDistortion = 0;

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

  xEstimateInterResidualQT(cs, partitioner, &zeroDistortion );
  TransformUnit& firstTU = *cs.getTU( partitioner.chType );

  cu.rootCbf = false;
  m_CABACEstimator->resetBits();
  m_CABACEstimator->rqt_root_cbf( cu );
  const uint64_t  zeroFracBits = m_CABACEstimator->getEstFracBits();
  double zeroCost = m_pcRdCost->calcRdCost( zeroFracBits, zeroDistortion, !m_pcEncCfg->m_lumaLevelToDeltaQPEnabled );

  const int  numValidTBlocks   = getNumberValidTBlocks( *cs.pcv );
  for (uint32_t i = 0; i < numValidTBlocks; i++)
  {
    cu.rootCbf |= TU::getCbfAtDepth(firstTU, ComponentID(i), 0);
  }

  // -------------------------------------------------------
  // If a block full of 0's is efficient, then just use 0's.
  // The costs at this point do not include header bits.

  if (zeroCost < cs.cost || !cu.rootCbf)
  {
    cu.sbtInfo = 0;
    cu.rootCbf = false;

    cs.clearTUs();

    // add a new "empty" TU spanning the whole CU
    cs.addEmptyTUs( partitioner, &cu );
  }

  // all decisions now made. Fully encode the CU, including the headers:
  m_CABACEstimator->getCtx() = ctxStart;

  uint64_t finalFracBits = xGetSymbolFracBitsInter( cs, partitioner );
  // we've now encoded the CU, and so have a valid bit cost
  if (!cu.rootCbf)
  {
    if (luma)
    {
      cs.getResiBuf().bufs[0].fill(0); // Clear the residual image, if we didn't code it.
    }
    if (chroma && isChromaEnabled(cs.pcv->chrFormat))
    {
      cs.getResiBuf().bufs[1].fill(0); // Clear the residual image, if we didn't code it.
      cs.getResiBuf().bufs[2].fill(0); // Clear the residual image, if we didn't code it.
    }
  }
  if (luma)
  {
    cs.getRecoBuf().bufs[0].reconstruct(cs.getPredBuf().bufs[0], cs.getResiBuf().bufs[0], cs.slice->clpRngs[COMP_Y]);
  }
  if (chroma)
  {
    cs.getRecoBuf().bufs[1].reconstruct(cs.getPredBuf().bufs[1], cs.getResiBuf().bufs[1], cs.slice->clpRngs[COMP_Cb]);
    cs.getRecoBuf().bufs[2].reconstruct(cs.getPredBuf().bufs[2], cs.getResiBuf().bufs[2], cs.slice->clpRngs[COMP_Cr]);
  }
  // update with clipped distortion and cost (previously unclipped reconstruction values were used)
  Distortion finalDistortion = 0;

  for (int comp = 0; comp < numValidComponents; comp++)
  {
    const ComponentID compID = ComponentID(comp);
    if (compID == COMP_Y && !luma)
      continue;
    if (compID != COMP_Y && !chroma)
      continue;
    CPelBuf reco = cs.getRecoBuf (compID);
    CPelBuf org  = cs.getOrgBuf  (compID);

    finalDistortion += m_pcRdCost->getDistPart( org, reco, sps.bitDepths[toChannelType(compID)], compID, DF_SSE );
  }

  cs.dist     = finalDistortion;
  cs.fracBits = finalFracBits;
  cs.cost     = m_pcRdCost->calcRdCost(cs.fracBits, cs.dist);

  CHECK(cs.tus.size() == 0, "No TUs present");
}

uint64_t InterSearch::xGetSymbolFracBitsInter(CodingStructure &cs, Partitioner &partitioner)
{
  uint64_t fracBits   = 0;
  CodingUnit &cu    = *cs.getCU( partitioner.chType, partitioner.treeType );

  m_CABACEstimator->resetBits();

  if( cu.mergeFlag && !cu.rootCbf )
  {
    cu.skip = true;

    m_CABACEstimator->cu_skip_flag  ( cu );
    if (!cu.ciip)
    {
      m_CABACEstimator->merge_data(cu);
    }
    fracBits   += m_CABACEstimator->getEstFracBits();
  }
  else
  {
    CHECK( cu.skip, "Skip flag has to be off at this point!" );

    if (cu.Y().valid())
    m_CABACEstimator->cu_skip_flag( cu );
    m_CABACEstimator->pred_mode   ( cu );
    m_CABACEstimator->cu_pred_data( cu );
    CUCtx cuCtx;
    cuCtx.isDQPCoded = true;
    cuCtx.isChromaQpAdjCoded = true;
    m_CABACEstimator->cu_residual ( cu, partitioner, cuCtx );
    fracBits       += m_CABACEstimator->getEstFracBits();
  }

  return fracBits;
}

double InterSearch::xGetMEDistortionWeight(uint8_t BcwIdx, RefPicList refPicList)
{
  if( BcwIdx != BCW_DEFAULT )
  {
    return fabs( (double)getBcwWeight( BcwIdx, refPicList ) / (double)g_BcwWeightBase );
  }
  else
  {
    return 0.5;
  }
}

bool InterSearch::xReadBufferedUniMv( CodingUnit& cu, RefPicList eRefPicList, int32_t iRefIdx, Mv& pcMvPred, Mv& rcMv, uint32_t& ruiBits, Distortion& ruiCost )
{
  if( m_uniMotions.isReadMode( (uint32_t)eRefPicList, (uint32_t)iRefIdx ) )
  {
    m_uniMotions.copyTo(rcMv, ruiCost, (uint32_t)eRefPicList, (uint32_t)iRefIdx);

    Mv pred = pcMvPred;
    pred.changeTransPrecInternal2Amvr( cu.imv );
    m_pcRdCost->setPredictor(pred);
    m_pcRdCost->setCostScale(0);

    Mv mv = rcMv;
    mv.changeTransPrecInternal2Amvr( cu.imv );
    uint32_t mvBits = m_pcRdCost->getBitsOfVectorWithPredictor( mv.hor, mv.ver, 0 );

    ruiBits += mvBits;
    ruiCost += m_pcRdCost->getCost(ruiBits);
    return true;
  }
  return false;
}

bool InterSearch::xReadBufferedAffineUniMv( CodingUnit& cu, RefPicList eRefPicList, int32_t iRefIdx, Mv acMvPred[3], Mv acMv[3], uint32_t& ruiBits, Distortion& ruiCost, int& mvpIdx, const AffineAMVPInfo& aamvpi )
{
  if( m_uniMotions.isReadModeAffine( (uint32_t)eRefPicList, (uint32_t)iRefIdx, cu.affineType ) )
  {
    m_uniMotions.copyAffineMvTo( acMv, ruiCost, (uint32_t)eRefPicList, (uint32_t)iRefIdx, cu.affineType, mvpIdx );
    m_pcRdCost->setCostScale(0);
    acMvPred[0] = aamvpi.mvCandLT[mvpIdx];
    acMvPred[1] = aamvpi.mvCandRT[mvpIdx];
    acMvPred[2] = aamvpi.mvCandLB[mvpIdx];

    uint32_t mvBits = 0;
    for( int verIdx = 0; verIdx < ( cu.affineType ? 3 : 2 ); verIdx++ )
    {
      Mv pred = verIdx ? acMvPred[verIdx] + acMv[0] - acMvPred[0] : acMvPred[verIdx];
      pred.changePrecision(MV_PRECISION_INTERNAL, MV_PRECISION_QUARTER);
      m_pcRdCost->setPredictor(pred);
      Mv mv = acMv[verIdx];
      mv.changePrecision(MV_PRECISION_INTERNAL, MV_PRECISION_QUARTER);
      mvBits += m_pcRdCost->getBitsOfVectorWithPredictor( mv.hor, mv.ver, 0 );
    }
    ruiBits += mvBits;
    ruiCost += m_pcRdCost->getCost(ruiBits);
    return true;
  }
  return false;
}

void InterSearch::xSymMvdCheckBestMvp(
  CodingUnit& cu,
  CPelUnitBuf& origBuf,
  Mv curMv,
  RefPicList curRefList,
  AMVPInfo amvpInfo[2][MAX_REF_PICS],
  int32_t BcwIdx,
  Mv cMvPredSym[2],
  int32_t mvpIdxSym[2],
  Distortion& bestCost,
  bool skip
)
{
  RefPicList tarRefList = (RefPicList)(1 - curRefList);
  int32_t refIdxCur = cu.slice->symRefIdx[curRefList];
  int32_t refIdxTar = cu.slice->symRefIdx[tarRefList];

  MvField cCurMvField, cTarMvField;
  cCurMvField.setMvField(curMv, refIdxCur);
  AMVPInfo& amvpCur = amvpInfo[curRefList][refIdxCur];
  AMVPInfo& amvpTar = amvpInfo[tarRefList][refIdxTar];
  m_pcRdCost->setCostScale(0);

  double fWeight = 0.0;
  PelUnitBuf bufTmp;

  // get prediction of eCurRefPicList
  PelUnitBuf predBufA = m_tmpPredStorage[curRefList].getCompactBuf( cu );
  const Picture* picRefA = cu.slice->getRefPic(curRefList, cCurMvField.refIdx);
  Mv mvA = cCurMvField.mv;
  xClipMvSearch( mvA, cu.lumaPos(), cu.lumaSize(), *cu.cs->pcv, m_ifpLines );
  xPredInterBlk( COMP_Y, cu, picRefA, mvA, predBufA, false, cu.slice->clpRngs[ COMP_Y ], false, false );

  bufTmp = m_tmpStorageLCU.getCompactBuf( cu );
  bufTmp.copyFrom( origBuf );
  bufTmp.removeHighFreq( predBufA, m_pcEncCfg->m_bClipForBiPredMeEnabled, cu.slice->clpRngs/*, getBcwWeight( cu.BcwIdx, tarRefList )*/ );
  fWeight = xGetMEDistortionWeight( cu.BcwIdx, tarRefList );

  int32_t skipMvpIdx[2];
  skipMvpIdx[0] = skip ? mvpIdxSym[0] : -1;
  skipMvpIdx[1] = skip ? mvpIdxSym[1] : -1;

  for (int i = 0; i < amvpCur.numCand; i++)
  {
    for (int j = 0; j < amvpTar.numCand; j++)
    {
      if (skipMvpIdx[curRefList] == i && skipMvpIdx[tarRefList] == j)
        continue;

      Distortion cost = MAX_DISTORTION;
      cTarMvField.setMvField(curMv.getSymmvdMv(amvpCur.mvCand[i], amvpTar.mvCand[j]), refIdxTar);

      // get prediction of eTarRefPicList
      PelUnitBuf predBufB = m_tmpPredStorage[tarRefList].getCompactBuf( cu );
      const Picture* picRefB = cu.slice->getRefPic(tarRefList, cTarMvField.refIdx);
      Mv mvB = cTarMvField.mv;
      xClipMvSearch( mvB, cu.lumaPos(), cu.lumaSize(), *cu.cs->pcv, m_ifpLines );
      xPredInterBlk( COMP_Y, cu, picRefB, mvB, predBufB, false, cu.slice->clpRngs[ COMP_Y ], false, false );

      // calc distortion
      cost = ( Distortion ) floor( fWeight * ( double ) m_pcRdCost->getDistPart( bufTmp.Y(), predBufB.Y(), cu.cs->sps->bitDepths[ CH_L ], COMP_Y, DF_HAD ) );

      Mv pred = amvpCur.mvCand[i];
      pred.changeTransPrecInternal2Amvr(cu.imv);
      m_pcRdCost->setPredictor(pred);
      Mv mv = curMv;
      mv.changeTransPrecInternal2Amvr(cu.imv);
      uint32_t bits = m_pcRdCost->getBitsOfVectorWithPredictor(mv.hor, mv.ver, 0);
      bits += m_auiMVPIdxCost[i][AMVP_MAX_NUM_CANDS];
      bits += m_auiMVPIdxCost[j][AMVP_MAX_NUM_CANDS];
      cost += m_pcRdCost->getCost(bits);
      if (cost < bestCost)
      {
        bestCost = cost;
        cMvPredSym[curRefList] = amvpCur.mvCand[i];
        cMvPredSym[tarRefList] = amvpTar.mvCand[j];
        mvpIdxSym[curRefList] = i;
        mvpIdxSym[tarRefList] = j;
      }
    }
  }
}

void InterSearch::resetSavedAffineMotion()
{
  for (int i = 0; i < 2; i++)
  {
    for (int j = 0; j < 2; j++)
    {
      m_affineMotion.acMvAffine4Para[i][j] = Mv(0, 0);
      m_affineMotion.acMvAffine6Para[i][j] = Mv(0, 0);
    }
    m_affineMotion.acMvAffine6Para[i][2] = Mv(0, 0);

    m_affineMotion.affine4ParaRefIdx[i] = -1;
    m_affineMotion.affine6ParaRefIdx[i] = -1;
  }
  m_affineMotion.affine4ParaAvail = false;
  m_affineMotion.affine6ParaAvail = false;
}

void InterSearch::storeAffineMotion(Mv acAffineMv[2][3], int16_t affineRefIdx[2], EAffineModel affineType, int BcwIdx)
{
  if ((BcwIdx == BCW_DEFAULT || !m_affineMotion.affine6ParaAvail) && affineType == AFFINEMODEL_6PARAM)
  {
    for (int i = 0; i < 2; i++)
    {
      for (int j = 0; j < 3; j++)
      {
        m_affineMotion.acMvAffine6Para[i][j] = acAffineMv[i][j];
      }
      m_affineMotion.affine6ParaRefIdx[i] = affineRefIdx[i];
    }
    m_affineMotion.affine6ParaAvail = true;
  }

  if ((BcwIdx == BCW_DEFAULT || !m_affineMotion.affine4ParaAvail) && affineType == AFFINEMODEL_4PARAM)
  {
    for (int i = 0; i < 2; i++)
    {
      for (int j = 0; j < 2; j++)
      {
        m_affineMotion.acMvAffine4Para[i][j] = acAffineMv[i][j];
      }
      m_affineMotion.affine4ParaRefIdx[i] = affineRefIdx[i];
    }
    m_affineMotion.affine4ParaAvail = true;
  }
}

void InterSearch::xPredAffineInterSearch( CodingUnit& cu,
                                          CPelUnitBuf&    origBuf,
                                          int             puIdx,
                                          uint32_t&       lastMode,
                                          Distortion&     affineCost,
                                          Mv              hevcMv[2][MAX_REF_PICS],
                                          Mv              mvAffine4Para[2][MAX_REF_PICS][3],
                                          int             refIdx4Para[2],
                                          uint8_t         BcwIdx,
                                          bool            enforceBcwPred,
                                          uint32_t        BcwIdxBits )
{
  const Slice &slice = *cu.slice;

  affineCost = MAX_DISTORTION;

  Mv        cMvZero;
  Mv        aacMv[2][3];
  Mv        cMvBi[2][3];
  AffineMVInfo tmp;

  int       iNumPredDir = slice.isInterP() ? 1 : 2;

  int mvNum = 2;
  mvNum = cu.affineType ? 3 : 2;

  // Mvp
  Mv        cMvPred[2][MAX_REF_PICS][3];
  Mv        cMvPredBi[2][MAX_REF_PICS][3];
  int       aaiMvpIdxBi[2][MAX_REF_PICS];
  int       aaiMvpIdx[2][MAX_REF_PICS];
  int       aaiMvpNum[2][MAX_REF_PICS];

  AffineAMVPInfo aacAffineAMVPInfo[2][MAX_REF_PICS];
  AffineAMVPInfo affiAMVPInfoTemp[2];

  uint32_t      uiMbBits[3] = { 1, 1, 0 };
  int           iRefIdx[2] = { 0,0 }; // If un-initialized, may cause SEGV in bi-directional prediction iterative stage.
  int           iRefIdxBi[2];
  int           iRefStart, iRefEnd;
  int           bestBiPRefIdxL1 = 0;
  int           bestBiPMvpL1 = 0;
  Distortion    biPDistTemp = MAX_DISTORTION;

  Distortion    uiCost[2] = { MAX_DISTORTION, MAX_DISTORTION };
  Distortion    uiCostBi = MAX_DISTORTION;
  Distortion    uiCostTemp;

  uint32_t      uiBits[3] = { 0 };
  uint32_t      uiBitsTemp;
  Distortion    bestBiPDist = MAX_DISTORTION;

  Distortion    uiCostTempL0[MAX_NUM_REF];
  for (int iNumRef = 0; iNumRef < MAX_NUM_REF; iNumRef++)
  {
    uiCostTempL0[iNumRef] = MAX_DISTORTION;
  }
  uint32_t      uiBitsTempL0[MAX_NUM_REF];

  Mv            mvValidList1[4];
  int           refIdxValidList1 = 0;
  uint32_t      bitsValidList1 = MAX_UINT;
  Distortion    costValidList1 = MAX_DISTORTION;
  Mv            mvHevc[3];
  const bool    affineAmvrEnabled = false;

  xGetBlkBits(slice.isInterP(), puIdx, lastMode, uiMbBits);

  cu.affine = true;
  cu.mergeFlag = false;
  if (BcwIdx != BCW_DEFAULT)
  {
    cu.BcwIdx = BcwIdx;
  }

  // Uni-directional prediction
  for (int iRefList = 0; iRefList < iNumPredDir; iRefList++)
  {
    RefPicList  refPicList = (iRefList ? REF_PIC_LIST_1 : REF_PIC_LIST_0);
    cu.interDir = (iRefList ? 2 : 1);
    for (int iRefIdxTemp = 0; iRefIdxTemp < slice.numRefIdx[refPicList]; iRefIdxTemp++)
    {
      // Get RefIdx bits
      uiBitsTemp = uiMbBits[iRefList];
      if (slice.numRefIdx[refPicList] > 1)
      {
        uiBitsTemp += iRefIdxTemp + 1;
        if (iRefIdxTemp == slice.numRefIdx[refPicList] - 1)
        {
          uiBitsTemp--;
        }
      }

      // Do Affine AMVP
      bool foundPred = xEstimateAffineAMVP(cu, affiAMVPInfoTemp[refPicList], origBuf, refPicList, iRefIdxTemp, cMvPred[iRefList][iRefIdxTemp], biPDistTemp);
      if( !foundPred )
        return;

      if (affineAmvrEnabled)
      {
        biPDistTemp += m_pcRdCost->getCost(xCalcAffineMVBits(cu, cMvPred[iRefList][iRefIdxTemp], cMvPred[iRefList][iRefIdxTemp]));
      }
      aaiMvpIdx[iRefList][iRefIdxTemp] = cu.mvpIdx[refPicList];
      aaiMvpNum[iRefList][iRefIdxTemp] = cu.mvpNum[refPicList];;
      if (cu.affineType == AFFINEMODEL_6PARAM && refIdx4Para[iRefList] != iRefIdxTemp)
      {
        xCopyAffineAMVPInfo(affiAMVPInfoTemp[refPicList], aacAffineAMVPInfo[iRefList][iRefIdxTemp]);
        continue;
      }

      // set hevc ME result as start search position when it is best than mvp
      for (int i = 0; i<3; i++)
      {
        mvHevc[i] = hevcMv[iRefList][iRefIdxTemp];
        mvHevc[i].roundAffinePrecInternal2Amvr(cu.imv);
      }
      PelUnitBuf predBuf = m_tmpStorageLCU.getCompactBuf(cu);

      Distortion uiCandCost = xGetAffineTemplateCost(cu, origBuf, predBuf, mvHevc, aaiMvpIdx[iRefList][iRefIdxTemp],
        AMVP_MAX_NUM_CANDS, refPicList, iRefIdxTemp);

      if (affineAmvrEnabled)
      {
        uiCandCost += m_pcRdCost->getCost(xCalcAffineMVBits(cu, mvHevc, cMvPred[iRefList][iRefIdxTemp]));
      }

      //check stored affine motion
      bool affine4Para = cu.affineType == AFFINEMODEL_4PARAM;
      bool savedParaAvail = cu.imv && ((m_affineMotion.affine4ParaRefIdx[iRefList] == iRefIdxTemp && affine4Para && m_affineMotion.affine4ParaAvail) ||
        (m_affineMotion.affine6ParaRefIdx[iRefList] == iRefIdxTemp && !affine4Para && m_affineMotion.affine6ParaAvail));

      if (savedParaAvail)
      {
        Mv mvFour[3];
        for (int i = 0; i < mvNum; i++)
        {
          mvFour[i] = affine4Para ? m_affineMotion.acMvAffine4Para[iRefList][i] : m_affineMotion.acMvAffine6Para[iRefList][i];
          mvFour[i].roundAffinePrecInternal2Amvr(cu.imv);
        }

        Distortion candCostInherit = xGetAffineTemplateCost(cu, origBuf, predBuf, mvFour, aaiMvpIdx[iRefList][iRefIdxTemp], AMVP_MAX_NUM_CANDS, refPicList, iRefIdxTemp);
        candCostInherit += m_pcRdCost->getCost(xCalcAffineMVBits(cu, mvFour, cMvPred[iRefList][iRefIdxTemp]));

        if (candCostInherit < uiCandCost)
        {
          uiCandCost = candCostInherit;
          memcpy(mvHevc, mvFour, 3 * sizeof(Mv));
        }
      }

      if( cu.affineType == AFFINEMODEL_4PARAM && m_AffineProfList->m_affMVListSize && (!cu.cs->sps->BCW || BcwIdx == BCW_DEFAULT ) )
      {
        int shift = MAX_CU_DEPTH;
        for (int i = 0; i < m_AffineProfList->m_affMVListSize; i++)
        {
          AffineMVInfo *mvInfo = m_AffineProfList->m_affMVList + ((m_AffineProfList->m_affMVListIdx - i - 1 + m_AffineProfList->m_affMVListMaxSize) % (m_AffineProfList->m_affMVListMaxSize));
          //check;
          int j = 0;
          for (; j < i; j++)
          {
            AffineMVInfo *prevMvInfo = m_AffineProfList->m_affMVList + ((m_AffineProfList->m_affMVListIdx - j - 1 + m_AffineProfList->m_affMVListMaxSize) % (m_AffineProfList->m_affMVListMaxSize));
            if ((mvInfo->affMVs[iRefList][iRefIdxTemp][0] == prevMvInfo->affMVs[iRefList][iRefIdxTemp][0]) &&
              (mvInfo->affMVs[iRefList][iRefIdxTemp][1] == prevMvInfo->affMVs[iRefList][iRefIdxTemp][1])
              && (mvInfo->x == prevMvInfo->x) && (mvInfo->y == prevMvInfo->y)
              && (mvInfo->w == prevMvInfo->w)
              )
            {
              break;
            }
          }
          if (j < i)
            continue;

          Mv mvTmp[3], *nbMv = mvInfo->affMVs[iRefList][iRefIdxTemp];
          int vx, vy;
          int dMvHorX, dMvHorY, dMvVerX, dMvVerY;
          int mvScaleHor = nbMv[0].hor * (1<< shift);
          int mvScaleVer = nbMv[0].ver * (1<< shift);
          Mv dMv = nbMv[1] - nbMv[0];
          dMvHorX = dMv.hor *(1<<(shift - Log2(mvInfo->w)));
          dMvHorY = dMv.ver *(1<< (shift - Log2(mvInfo->w)));
          dMvVerX = -dMvHorY;
          dMvVerY = dMvHorX;
          vx = mvScaleHor + dMvHorX * (cu.Y().x - mvInfo->x) + dMvVerX * (cu.Y().y - mvInfo->y);
          vy = mvScaleVer + dMvHorY * (cu.Y().x - mvInfo->x) + dMvVerY * (cu.Y().y - mvInfo->y);
          roundAffineMv(vx, vy, shift);
          mvTmp[0] = Mv(vx, vy);
          mvTmp[0].clipToStorageBitDepth();
          clipMv(mvTmp[0], cu.lumaPos(), cu.lumaSize(), *cu.cs->pcv);
          mvTmp[0].roundAffinePrecInternal2Amvr(cu.imv);
          vx = mvScaleHor + dMvHorX * (cu.Y().x + cu.Y().width - mvInfo->x) + dMvVerX * (cu.Y().y - mvInfo->y);
          vy = mvScaleVer + dMvHorY * (cu.Y().x + cu.Y().width - mvInfo->x) + dMvVerY * (cu.Y().y - mvInfo->y);
          roundAffineMv(vx, vy, shift);
          mvTmp[1] = Mv(vx, vy);
          mvTmp[1].clipToStorageBitDepth();
          clipMv(mvTmp[1], cu.lumaPos(), cu.lumaSize(), *cu.cs->pcv);
          mvTmp[0].roundAffinePrecInternal2Amvr(cu.imv);
          mvTmp[1].roundAffinePrecInternal2Amvr(cu.imv);
          Distortion tmpCost = xGetAffineTemplateCost(cu, origBuf, predBuf, mvTmp, aaiMvpIdx[iRefList][iRefIdxTemp], AMVP_MAX_NUM_CANDS, refPicList, iRefIdxTemp);
          if (affineAmvrEnabled)
          {
            tmpCost += m_pcRdCost->getCost(xCalcAffineMVBits(cu, mvTmp, cMvPred[iRefList][iRefIdxTemp]));
          }
          if (tmpCost < uiCandCost)
          {
            uiCandCost = tmpCost;
            std::memcpy(mvHevc, mvTmp, 3 * sizeof(Mv));
          }
        }
      }
      if (cu.affineType == AFFINEMODEL_6PARAM)
      {
        Mv mvFour[3];
        mvFour[0] = mvAffine4Para[iRefList][iRefIdxTemp][0];
        mvFour[1] = mvAffine4Para[iRefList][iRefIdxTemp][1];
        mvAffine4Para[iRefList][iRefIdxTemp][0].roundAffinePrecInternal2Amvr(cu.imv);
        mvAffine4Para[iRefList][iRefIdxTemp][1].roundAffinePrecInternal2Amvr(cu.imv);

        int shift = MAX_CU_DEPTH;
        int vx2 = (mvFour[0].hor * (1<< shift)) - ((mvFour[1].ver - mvFour[0].ver) * (1<< (shift + Log2(cu.lheight()) - Log2(cu.lwidth()))));
        int vy2 = (mvFour[0].ver * (1<< shift)) + ((mvFour[1].hor - mvFour[0].hor) * (1<< (shift + Log2(cu.lheight()) - Log2(cu.lwidth()))));
        int offset = (1 << (shift - 1));
        vx2 = (vx2 + offset - (vx2 >= 0)) >> shift;
        vy2 = (vy2 + offset - (vy2 >= 0)) >> shift;
        mvFour[2].hor = vx2;
        mvFour[2].ver = vy2;
        mvFour[2].clipToStorageBitDepth();
        mvFour[0].roundAffinePrecInternal2Amvr(cu.imv);
        mvFour[1].roundAffinePrecInternal2Amvr(cu.imv);
        mvFour[2].roundAffinePrecInternal2Amvr(cu.imv);
        Distortion uiCandCostInherit = xGetAffineTemplateCost(cu, origBuf, predBuf, mvFour, aaiMvpIdx[iRefList][iRefIdxTemp], AMVP_MAX_NUM_CANDS, refPicList, iRefIdxTemp);
        if (affineAmvrEnabled)
        {
          uiCandCostInherit += m_pcRdCost->getCost(xCalcAffineMVBits(cu, mvFour, cMvPred[iRefList][iRefIdxTemp]));
        }
        if (uiCandCostInherit < uiCandCost)
        {
          uiCandCost = uiCandCostInherit;
          for (int i = 0; i < 3; i++)
          {
            mvHevc[i] = mvFour[i];
          }
        }
      }

      if (uiCandCost < biPDistTemp)
      {
        ::memcpy(tmp.affMVs[iRefList][iRefIdxTemp], mvHevc, sizeof(Mv) * 3);
      }
      else
      {
        ::memcpy(tmp.affMVs[iRefList][iRefIdxTemp], cMvPred[iRefList][iRefIdxTemp], sizeof(Mv) * 3);
      }

      // GPB list 1, save the best MvpIdx, RefIdx and Cost
      if (slice.picHeader->mvdL1Zero && iRefList == 1 && biPDistTemp < bestBiPDist)
      {
        bestBiPDist = biPDistTemp;
        bestBiPMvpL1 = aaiMvpIdx[iRefList][iRefIdxTemp];
        bestBiPRefIdxL1 = iRefIdxTemp;
      }

      // Update bits
      uiBitsTemp += m_auiMVPIdxCost[aaiMvpIdx[iRefList][iRefIdxTemp]][AMVP_MAX_NUM_CANDS];

      if (m_pcEncCfg->m_bFastMEForGenBLowDelayEnabled && iRefList == 1)   // list 1
      {
        if (slice.list1IdxToList0Idx[iRefIdxTemp] >= 0 && (cu.affineType != AFFINEMODEL_6PARAM || slice.list1IdxToList0Idx[iRefIdxTemp] == refIdx4Para[0]))
        {
          int iList1ToList0Idx = slice.list1IdxToList0Idx[iRefIdxTemp];
          ::memcpy(tmp.affMVs[1][iRefIdxTemp], tmp.affMVs[0][iList1ToList0Idx], sizeof(Mv) * 3);
          uiCostTemp = uiCostTempL0[iList1ToList0Idx];

          uiCostTemp -= m_pcRdCost->getCost(uiBitsTempL0[iList1ToList0Idx]);
          uiBitsTemp += xCalcAffineMVBits(cu, tmp.affMVs[iRefList][iRefIdxTemp], cMvPred[iRefList][iRefIdxTemp]);
          /*calculate the correct cost*/
          uiCostTemp += m_pcRdCost->getCost(uiBitsTemp);
          DTRACE(g_trace_ctx, D_COMMON, " (%d) uiCostTemp=%d\n", DTRACE_GET_COUNTER(g_trace_ctx, D_COMMON), uiCostTemp);
        }
        else
        {
          xAffineMotionEstimation(cu, origBuf, refPicList, cMvPred[iRefList][iRefIdxTemp], iRefIdxTemp, tmp.affMVs[iRefList][iRefIdxTemp], 
                                  uiBitsTemp, uiCostTemp, aaiMvpIdx[iRefList][iRefIdxTemp], affiAMVPInfoTemp[refPicList]);
        }
      }
      else
      {
        xAffineMotionEstimation(cu, origBuf, refPicList, cMvPred[iRefList][iRefIdxTemp], iRefIdxTemp, tmp.affMVs[iRefList][iRefIdxTemp], 
                                uiBitsTemp, uiCostTemp, aaiMvpIdx[iRefList][iRefIdxTemp], affiAMVPInfoTemp[refPicList]);
      }
      
      if( slice.sps->BCW && cu.BcwIdx == BCW_DEFAULT && slice.isInterB() )
      {
        m_uniMotions.setReadModeAffine( true, (uint8_t)iRefList, (uint8_t)iRefIdxTemp, cu.affineType );
        m_uniMotions.copyAffineMvFrom( tmp.affMVs[iRefList][iRefIdxTemp], uiCostTemp - m_pcRdCost->getCost(uiBitsTemp), (uint8_t)iRefList, (uint8_t)iRefIdxTemp, cu.affineType,
                                       aaiMvpIdx[iRefList][iRefIdxTemp] );
      }

      // Set best AMVP Index
      xCopyAffineAMVPInfo(affiAMVPInfoTemp[refPicList], aacAffineAMVPInfo[iRefList][iRefIdxTemp]);
      if (cu.imv != 2)//|| !m_pcEncCfg->getUseAffineAmvrEncOpt())
        xCheckBestAffineMVP(cu, affiAMVPInfoTemp[refPicList], refPicList, tmp.affMVs[iRefList][iRefIdxTemp], cMvPred[iRefList][iRefIdxTemp], aaiMvpIdx[iRefList][iRefIdxTemp], uiBitsTemp, uiCostTemp);

      if (iRefList == 0)
      {
        uiCostTempL0[iRefIdxTemp] = uiCostTemp;
        uiBitsTempL0[iRefIdxTemp] = uiBitsTemp;
      }
      DTRACE(g_trace_ctx, D_COMMON, " (%d) uiCostTemp=%d, uiCost[iRefList]=%d\n", DTRACE_GET_COUNTER(g_trace_ctx, D_COMMON), uiCostTemp, uiCost[iRefList]);
      if (uiCostTemp < uiCost[iRefList])
      {
        uiCost[iRefList] = uiCostTemp;
        uiBits[iRefList] = uiBitsTemp; // storing for bi-prediction

                                       // set best motion
        ::memcpy(aacMv[iRefList], tmp.affMVs[iRefList][iRefIdxTemp], sizeof(Mv) * 3);
        iRefIdx[iRefList] = iRefIdxTemp;
      }

      if (iRefList == 1 && uiCostTemp < costValidList1 && slice.list1IdxToList0Idx[iRefIdxTemp] < 0)
      {
        costValidList1 = uiCostTemp;
        bitsValidList1 = uiBitsTemp;

        // set motion
        memcpy(mvValidList1, tmp.affMVs[iRefList][iRefIdxTemp], sizeof(Mv) * 3);
        refIdxValidList1 = iRefIdxTemp;
      }
    } // End refIdx loop
  } // end Uni-prediction

  if (cu.affineType == AFFINEMODEL_4PARAM)
  {
    ::memcpy(mvAffine4Para, tmp.affMVs, sizeof(tmp.affMVs));
    if (cu.imv == IMV_OFF)
    {
      m_AffineProfList->insert( tmp, cu.Y());
    }
  }

  // Bi-directional prediction
  if (slice.isInterB() && !CU::isBipredRestriction(cu))
  {
    cu.interDir = 3;
    m_isBi = true;

    // Set as best list0 and list1
    iRefIdxBi[0] = iRefIdx[0];
    iRefIdxBi[1] = iRefIdx[1];

    ::memcpy(cMvBi, aacMv, sizeof(aacMv));
    ::memcpy(cMvPredBi, cMvPred, sizeof(cMvPred));
    ::memcpy(aaiMvpIdxBi, aaiMvpIdx, sizeof(aaiMvpIdx));

    uint32_t uiMotBits[2];
    bool doBiPred = true;

    if (slice.picHeader->mvdL1Zero) // GPB, list 1 only use Mvp
    {
      xCopyAffineAMVPInfo(aacAffineAMVPInfo[1][bestBiPRefIdxL1], affiAMVPInfoTemp[REF_PIC_LIST_1]);
      cu.mvpIdx[REF_PIC_LIST_1] = bestBiPMvpL1;
      aaiMvpIdxBi[1][bestBiPRefIdxL1] = bestBiPMvpL1;

      // Set Mv for list1
      Mv pcMvTemp[3] = { affiAMVPInfoTemp[REF_PIC_LIST_1].mvCandLT[bestBiPMvpL1],
                         affiAMVPInfoTemp[REF_PIC_LIST_1].mvCandRT[bestBiPMvpL1],
                         affiAMVPInfoTemp[REF_PIC_LIST_1].mvCandLB[bestBiPMvpL1] };
      ::memcpy(cMvPredBi[1][bestBiPRefIdxL1], pcMvTemp, sizeof(Mv) * 3);
      ::memcpy(cMvBi[1], pcMvTemp, sizeof(Mv) * 3);
      ::memcpy(tmp.affMVs[1][bestBiPRefIdxL1], pcMvTemp, sizeof(Mv) * 3);
      iRefIdxBi[1] = bestBiPRefIdxL1;

      if( m_pcEncCfg->m_ifpLines && !xIsAffineMvInRangeFPP( cu, pcMvTemp, m_pcEncCfg->m_ifpLines ) )
      {
        // this mvp cannot be used for mv, skip Bi-pred
        uiCostBi = MAX_DISTORTION;
        doBiPred = false;
      }
      else
      {

        // Get list1 prediction block
        CU::setAllAffineMv(cu, cMvBi[1][0], cMvBi[1][1], cMvBi[1][2], REF_PIC_LIST_1);
        cu.refIdx[REF_PIC_LIST_1] = iRefIdxBi[1];

        PelUnitBuf predBufTmp = m_tmpPredStorage[REF_PIC_LIST_1].getCompactBuf( cu );
        motionCompensation(cu, predBufTmp, REF_PIC_LIST_1);

        // Update bits
        uiMotBits[0] = uiBits[0] - uiMbBits[0];
        uiMotBits[1] = uiMbBits[1];

        if (slice.numRefIdx[REF_PIC_LIST_1] > 1)
        {
          uiMotBits[1] += bestBiPRefIdxL1 + 1;
          if (bestBiPRefIdxL1 == slice.numRefIdx[REF_PIC_LIST_1] - 1)
          {
            uiMotBits[1]--;
          }
        }
        uiMotBits[1] += m_auiMVPIdxCost[aaiMvpIdxBi[1][bestBiPRefIdxL1]][AMVP_MAX_NUM_CANDS];
        uiBits[2] = uiMbBits[2] + uiMotBits[0] + uiMotBits[1];
      }
    }
    else
    {
      uiMotBits[0] = uiBits[0] - uiMbBits[0];
      uiMotBits[1] = uiBits[1] - uiMbBits[1];
      uiBits[2] = uiMbBits[2] + uiMotBits[0] + uiMotBits[1];
    }

    if (doBiPred)
    {
      // 4-times iteration (default)
      int iNumIter = 4;
      // fast encoder setting or GPB: only one iteration
      if (m_pcEncCfg->m_fastInterSearchMode == VVENC_FASTINTERSEARCH_MODE3 || m_pcEncCfg->m_fastInterSearchMode == VVENC_FASTINTERSEARCH_MODE2 || slice.picHeader->mvdL1Zero)
      {
        iNumIter = 1;
      }

      for (int iIter = 0; iIter < iNumIter; iIter++)
      {
        // Set RefList
        int iRefList = iIter % 2;
        if (m_pcEncCfg->m_fastInterSearchMode == VVENC_FASTINTERSEARCH_MODE3 || m_pcEncCfg->m_fastInterSearchMode == VVENC_FASTINTERSEARCH_MODE2)
        {
          if (uiCost[0] <= uiCost[1])
          {
            iRefList = 1;
          }
          else
          {
            iRefList = 0;
          }
        }
        else if (iIter == 0)
        {
          iRefList = 0;
        }

        // First iterate, get prediction block of opposite direction
        if (iIter == 0 && !slice.picHeader->mvdL1Zero)
        {
          if( m_pcEncCfg->m_ifpLines && !xIsAffineMvInRangeFPP( cu, aacMv[1 - iRefList], m_pcEncCfg->m_ifpLines ) )
          {
            continue;
          }

          CU::setAllAffineMv(cu, aacMv[1 - iRefList][0], aacMv[1 - iRefList][1], aacMv[1 - iRefList][2], RefPicList(1 - iRefList));
          cu.refIdx[1 - iRefList] = iRefIdx[1 - iRefList];

          PelUnitBuf predBufTmp = m_tmpPredStorage[1 - iRefList].getCompactBuf( cu );
          motionCompensation(cu, predBufTmp, RefPicList(1 - iRefList));
        }

        RefPicList refPicList = (iRefList ? REF_PIC_LIST_1 : REF_PIC_LIST_0);

        if (slice.picHeader->mvdL1Zero) // GPB, fix List 1, search List 0
        {
          iRefList = 0;
          refPicList = REF_PIC_LIST_0;
        }

        bool bChanged = false;

        iRefStart = 0;
        iRefEnd = slice.numRefIdx[refPicList] - 1;
        for (int iRefIdxTemp = iRefStart; iRefIdxTemp <= iRefEnd; iRefIdxTemp++)
        {
          if (cu.affineType == AFFINEMODEL_6PARAM && refIdx4Para[iRefList] != iRefIdxTemp)
          {
            continue;
          }
          // update bits
          uiBitsTemp = uiMbBits[2] + uiMotBits[1 - iRefList];
          uiBitsTemp += ( (cu.slice->sps->BCW == true) ? BcwIdxBits : 0 );
          if (slice.numRefIdx[refPicList] > 1)
          {
            uiBitsTemp += iRefIdxTemp + 1;
            if (iRefIdxTemp == slice.numRefIdx[refPicList] - 1)
            {
              uiBitsTemp--;
            }
          }
          uiBitsTemp += m_auiMVPIdxCost[aaiMvpIdxBi[iRefList][iRefIdxTemp]][AMVP_MAX_NUM_CANDS];

          // call Affine ME
          xAffineMotionEstimation(cu, origBuf, refPicList, cMvPredBi[iRefList][iRefIdxTemp], iRefIdxTemp, tmp.affMVs[iRefList][iRefIdxTemp], 
                                  uiBitsTemp, uiCostTemp, aaiMvpIdxBi[iRefList][iRefIdxTemp], aacAffineAMVPInfo[iRefList][iRefIdxTemp], true);
          xCopyAffineAMVPInfo(aacAffineAMVPInfo[iRefList][iRefIdxTemp], affiAMVPInfoTemp[refPicList]);
          if (cu.imv != 2)
          {
            xCheckBestAffineMVP(cu, affiAMVPInfoTemp[refPicList], refPicList, tmp.affMVs[iRefList][iRefIdxTemp], cMvPredBi[iRefList][iRefIdxTemp], aaiMvpIdxBi[iRefList][iRefIdxTemp], uiBitsTemp, uiCostTemp);
          }

          if (uiCostTemp < uiCostBi)
          {
            bChanged = true;
            ::memcpy(cMvBi[iRefList], tmp.affMVs[iRefList][iRefIdxTemp], sizeof(Mv) * 3);
            iRefIdxBi[iRefList] = iRefIdxTemp;

            uiCostBi = uiCostTemp;
            uiMotBits[iRefList] = uiBitsTemp - uiMbBits[2] - uiMotBits[1 - iRefList];
            uiMotBits[iRefList] -= ( (cu.slice->sps->BCW == true) ? BcwIdxBits : 0 );
            uiBits[2] = uiBitsTemp;

            if (iNumIter != 1) // MC for next iter
            {
              //  Set motion
              CU::setAllAffineMv(cu, cMvBi[iRefList][0], cMvBi[iRefList][1], cMvBi[iRefList][2], refPicList);
              cu.refIdx[refPicList] = iRefIdxBi[refPicList];
              PelUnitBuf predBufTmp = m_tmpPredStorage[iRefList].getCompactBuf( cu );
              motionCompensation(cu, predBufTmp, refPicList);
            }
          }
        } // for loop-iRefIdxTemp

        if (!bChanged)
        {
          if ((uiCostBi <= uiCost[0] && uiCostBi <= uiCost[1]) || enforceBcwPred)
          {
            xCopyAffineAMVPInfo(aacAffineAMVPInfo[0][iRefIdxBi[0]], affiAMVPInfoTemp[REF_PIC_LIST_0]);
            xCheckBestAffineMVP(cu, affiAMVPInfoTemp[REF_PIC_LIST_0], REF_PIC_LIST_0, cMvBi[0], cMvPredBi[0][iRefIdxBi[0]], aaiMvpIdxBi[0][iRefIdxBi[0]], uiBits[2], uiCostBi);

            if (!slice.picHeader->mvdL1Zero)
            {
              xCopyAffineAMVPInfo(aacAffineAMVPInfo[1][iRefIdxBi[1]], affiAMVPInfoTemp[REF_PIC_LIST_1]);
              xCheckBestAffineMVP(cu, affiAMVPInfoTemp[REF_PIC_LIST_1], REF_PIC_LIST_1, cMvBi[1], cMvPredBi[1][iRefIdxBi[1]], aaiMvpIdxBi[1][iRefIdxBi[1]], uiBits[2], uiCostBi);
            }
          }
          break;
        }
      } // for loop-iter
    }
    m_isBi = false;
  } // if (B_SLICE)

  cu.mv [REF_PIC_LIST_0][0] = Mv();
  cu.mv [REF_PIC_LIST_1][0] = Mv();
  cu.mvd[REF_PIC_LIST_0][0] = cMvZero;
  cu.mvd[REF_PIC_LIST_1][0] = cMvZero;
  cu.refIdx[REF_PIC_LIST_0] = NOT_VALID;
  cu.refIdx[REF_PIC_LIST_1] = NOT_VALID;
  cu.mvpIdx[REF_PIC_LIST_0] = NOT_VALID;
  cu.mvpIdx[REF_PIC_LIST_1] = NOT_VALID;
  cu.mvpNum[REF_PIC_LIST_0] = NOT_VALID;
  cu.mvpNum[REF_PIC_LIST_1] = NOT_VALID;

  for (int verIdx = 0; verIdx < 3; verIdx++)
  {
    cu.mvd[REF_PIC_LIST_0][verIdx] = cMvZero;
    cu.mvd[REF_PIC_LIST_1][verIdx] = cMvZero;
  }

  // Set Motion Field
  memcpy(aacMv[1], mvValidList1, sizeof(Mv) * 3);
  iRefIdx[1] = refIdxValidList1;
  uiBits[1] = bitsValidList1;
  uiCost[1] = costValidList1;

  if (enforceBcwPred)
  {
    uiCost[0] = uiCost[1] = MAX_UINT;
  }

  // Affine ME result set
  if (uiCostBi <= uiCost[0] && uiCostBi <= uiCost[1]) // Bi
  {
    lastMode = 2;
    affineCost = uiCostBi;
    cu.interDir = 3;
    CU::setAllAffineMv(cu, cMvBi[0][0], cMvBi[0][1], cMvBi[0][2], REF_PIC_LIST_0);
    CU::setAllAffineMv(cu, cMvBi[1][0], cMvBi[1][1], cMvBi[1][2], REF_PIC_LIST_1);
    cu.refIdx[REF_PIC_LIST_0] = iRefIdxBi[0];
    cu.refIdx[REF_PIC_LIST_1] = iRefIdxBi[1];

    for (int verIdx = 0; verIdx < mvNum; verIdx++)
    {
      cu.mvd[REF_PIC_LIST_0][verIdx] = cMvBi[0][verIdx] - cMvPredBi[0][iRefIdxBi[0]][verIdx];
      cu.mvd[REF_PIC_LIST_1][verIdx] = cMvBi[1][verIdx] - cMvPredBi[1][iRefIdxBi[1]][verIdx];
      if (verIdx != 0)
      {
        cu.mvd[0][verIdx] = cu.mvd[0][verIdx] - cu.mvd[0][0];
        cu.mvd[1][verIdx] = cu.mvd[1][verIdx] - cu.mvd[1][0];
      }
    }


    cu.mvpIdx[REF_PIC_LIST_0] = aaiMvpIdxBi[0][iRefIdxBi[0]];
    cu.mvpNum[REF_PIC_LIST_0] = aaiMvpNum[0][iRefIdxBi[0]];
    cu.mvpIdx[REF_PIC_LIST_1] = aaiMvpIdxBi[1][iRefIdxBi[1]];
    cu.mvpNum[REF_PIC_LIST_1] = aaiMvpNum[1][iRefIdxBi[1]];
  }
  else if (uiCost[0] <= uiCost[1]) // List 0
  {
    lastMode = 0;
    affineCost = uiCost[0];
    cu.interDir = 1;
    CU::setAllAffineMv(cu, aacMv[0][0], aacMv[0][1], aacMv[0][2], REF_PIC_LIST_0);
    cu.refIdx[REF_PIC_LIST_0] = iRefIdx[0];

    for (int verIdx = 0; verIdx < mvNum; verIdx++)
    {
      cu.mvd[REF_PIC_LIST_0][verIdx] = aacMv[0][verIdx] - cMvPred[0][iRefIdx[0]][verIdx];
      if (verIdx != 0)
      {
        cu.mvd[0][verIdx] = cu.mvd[0][verIdx] - cu.mvd[0][0];
      }
    }

    cu.mvpIdx[REF_PIC_LIST_0] = aaiMvpIdx[0][iRefIdx[0]];
    cu.mvpNum[REF_PIC_LIST_0] = aaiMvpNum[0][iRefIdx[0]];
  }
  else
  {
    lastMode = 1;
    affineCost = uiCost[1];
    cu.interDir = 2;
    CU::setAllAffineMv(cu, aacMv[1][0], aacMv[1][1], aacMv[1][2], REF_PIC_LIST_1);
    cu.refIdx[REF_PIC_LIST_1] = iRefIdx[1];

    for (int verIdx = 0; verIdx < mvNum; verIdx++)
    {
      cu.mvd[REF_PIC_LIST_1][verIdx] = aacMv[1][verIdx] - cMvPred[1][iRefIdx[1]][verIdx];
      if (verIdx != 0)
      {
        cu.mvd[1][verIdx] = cu.mvd[1][verIdx] - cu.mvd[1][0];
      }
    }

    cu.mvpIdx[REF_PIC_LIST_1] = aaiMvpIdx[1][iRefIdx[1]];
    cu.mvpNum[REF_PIC_LIST_1] = aaiMvpNum[1][iRefIdx[1]];
  }
  if (BcwIdx != BCW_DEFAULT)
  {
    cu.BcwIdx = BCW_DEFAULT;
  }
}

Distortion InterSearch::xGetAffineTemplateCost(CodingUnit& cu, CPelUnitBuf& origBuf, PelUnitBuf& predBuf, Mv acMvCand[3], int iMVPIdx, int iMVPNum, RefPicList refPicList, int iRefIdx)
{
  Distortion uiCost = MAX_DISTORTION;

  const Picture* picRef = cu.slice->getRefPic(refPicList, iRefIdx);

  // prediction pattern
  Mv mv[3];
  memcpy(mv, acMvCand, sizeof(mv));

  if( m_pcEncCfg->m_ifpLines && !xIsAffineMvInRangeFPP( cu, mv, m_pcEncCfg->m_ifpLines ) )
  {
    return MAX_DISTORTION>>1;  
  }

  xPredAffineBlk(COMP_Y, cu, picRef, mv, predBuf, false, cu.slice->clpRngs[COMP_Y], refPicList);

  // calc distortion
  uiCost = m_pcRdCost->getDistPart(origBuf.Y(), predBuf.Y(), cu.cs->sps->bitDepths[CH_L], COMP_Y, DF_HAD );
  uiCost += m_pcRdCost->getCost(m_auiMVPIdxCost[iMVPIdx][iMVPNum]);

  DTRACE(g_trace_ctx, D_COMMON, " (%d) affineTemplateCost=%d\n", DTRACE_GET_COUNTER(g_trace_ctx, D_COMMON), uiCost);
  return uiCost;
}

void solveEqual(double** dEqualCoeff, int iOrder, double* dAffinePara)
{
  for (int k = 0; k < iOrder; k++)
  {
    dAffinePara[k] = 0.;
  }

  // row echelon
  for (int i = 1; i < iOrder; i++)
  {
    // find column max
    double temp = fabs(dEqualCoeff[i][i - 1]);
    int tempIdx = i;
    for (int j = i + 1; j < iOrder + 1; j++)
    {
      if (fabs(dEqualCoeff[j][i - 1]) > temp)
      {
        temp = fabs(dEqualCoeff[j][i - 1]);
        tempIdx = j;
      }
    }

    // swap line
    if (tempIdx != i)
    {
      for (int j = 0; j < iOrder + 1; j++)
      {
        dEqualCoeff[0][j] = dEqualCoeff[i][j];
        dEqualCoeff[i][j] = dEqualCoeff[tempIdx][j];
        dEqualCoeff[tempIdx][j] = dEqualCoeff[0][j];
      }
    }

    // elimination first column
    if (dEqualCoeff[i][i - 1] == 0.)
    {
      return;
    }
    for (int j = i + 1; j < iOrder + 1; j++)
    {
      for (int k = i; k < iOrder + 1; k++)
      {
        dEqualCoeff[j][k] = dEqualCoeff[j][k] - dEqualCoeff[i][k] * dEqualCoeff[j][i - 1] / dEqualCoeff[i][i - 1];
      }
    }
  }

  if (dEqualCoeff[iOrder][iOrder - 1] == 0.)
  {
    return;
  }
  dAffinePara[iOrder - 1] = dEqualCoeff[iOrder][iOrder] / dEqualCoeff[iOrder][iOrder - 1];
  for (int i = iOrder - 2; i >= 0; i--)
  {
    if (dEqualCoeff[i + 1][i] == 0.)
    {
      for (int k = 0; k < iOrder; k++)
      {
        dAffinePara[k] = 0.;
      }
      return;
    }
    double temp = 0;
    for (int j = i + 1; j < iOrder; j++)
    {
      temp += dEqualCoeff[i + 1][j] * dAffinePara[j];
    }
    dAffinePara[i] = (dEqualCoeff[i + 1][iOrder] - temp) / dEqualCoeff[i + 1][i];
  }
}

void InterSearch::xCheckBestAffineMVP(CodingUnit& cu, AffineAMVPInfo &affineAMVPInfo, RefPicList refPicList, Mv acMv[3], Mv acMvPred[3], int& riMVPIdx, uint32_t& ruiBits, Distortion& ruiCost)
{
  if (affineAMVPInfo.numCand < 2)
  {
    return;
  }

  int mvNum = cu.affineType ? 3 : 2;

  m_pcRdCost->selectMotionLambda();
  m_pcRdCost->setCostScale(0);

  int iBestMVPIdx = riMVPIdx;

  // Get origin MV bits
  Mv tmpPredMv[3];
  int iOrgMvBits = xCalcAffineMVBits(cu, acMv, acMvPred);
  iOrgMvBits += m_auiMVPIdxCost[riMVPIdx][AMVP_MAX_NUM_CANDS];

  int iBestMvBits = iOrgMvBits;
  for (int iMVPIdx = 0; iMVPIdx < affineAMVPInfo.numCand; iMVPIdx++)
  {
    if (iMVPIdx == riMVPIdx)
    {
      continue;
    }
    tmpPredMv[0] = affineAMVPInfo.mvCandLT[iMVPIdx];
    tmpPredMv[1] = affineAMVPInfo.mvCandRT[iMVPIdx];
    if (mvNum == 3)
    {
      tmpPredMv[2] = affineAMVPInfo.mvCandLB[iMVPIdx];
    }
    int iMvBits = xCalcAffineMVBits(cu, acMv, tmpPredMv);
    iMvBits += m_auiMVPIdxCost[iMVPIdx][AMVP_MAX_NUM_CANDS];

    if (iMvBits < iBestMvBits)
    {
      iBestMvBits = iMvBits;
      iBestMVPIdx = iMVPIdx;
    }
  }

  if (iBestMVPIdx != riMVPIdx)  // if changed
  {
    acMvPred[0] = affineAMVPInfo.mvCandLT[iBestMVPIdx];
    acMvPred[1] = affineAMVPInfo.mvCandRT[iBestMVPIdx];
    acMvPred[2] = affineAMVPInfo.mvCandLB[iBestMVPIdx];
    riMVPIdx = iBestMVPIdx;
    uint32_t uiOrgBits = ruiBits;
    ruiBits = uiOrgBits - iOrgMvBits + iBestMvBits;
    ruiCost = (ruiCost - m_pcRdCost->getCost(uiOrgBits)) + m_pcRdCost->getCost(ruiBits);
  }
}

void InterSearch::xAffineMotionEstimation(CodingUnit& cu,
  CPelUnitBuf&    origBuf,
  RefPicList      refPicList,
  Mv              acMvPred[3],
  int             iRefIdxPred,
  Mv              acMv[3],
  uint32_t&       ruiBits,
  Distortion&     ruiCost,
  int&            mvpIdx,
  const AffineAMVPInfo& aamvpi,
  bool            bBi)
{
  if( cu.cs->sps->BCW && cu.BcwIdx != BCW_DEFAULT && !bBi && xReadBufferedAffineUniMv( cu, refPicList, iRefIdxPred, acMvPred, acMv, ruiBits, ruiCost, mvpIdx, aamvpi ) )
  {
    return;
  }

  int bestMvpIdx = mvpIdx;
  const int width = cu.Y().width;
  const int height = cu.Y().height;

  const Picture* refPic = cu.slice->getRefPic(refPicList, iRefIdxPred);

  // Set Origin YUV: pcYuv
  CPelUnitBuf*   pBuf = &origBuf;
  double        fWeight = 1.0;

  CPelUnitBuf  origBufTmpCnst;

  // if Bi, set to ( 2 * Org - ListX )
  if (bBi)
  {
    PelUnitBuf  origBufTmp = m_tmpStorageLCU.getCompactBuf(cu);
    // NOTE: Other buf contains predicted signal from another direction
    PelUnitBuf otherBuf = m_tmpPredStorage[1 - (int)refPicList].getCompactBuf( cu );
    origBufTmp.copyFrom(origBuf);
    origBufTmp.removeHighFreq(otherBuf, m_pcEncCfg->m_bClipForBiPredMeEnabled, cu.slice->clpRngs);

    origBufTmpCnst = origBufTmp;
    pBuf           = &origBufTmpCnst;
    fWeight        = xGetMEDistortionWeight(cu.BcwIdx, refPicList);
  }

  // pred YUV
  PelUnitBuf  predBuf = m_tmpAffiStorage.getCompactBuf(cu);

  // Set start Mv position, use input mv as started search mv
  Mv acMvTemp[3];
  ::memcpy(acMvTemp, acMv, sizeof(Mv) * 3);
  // Set delta mv
  // malloc buffer
  int iParaNum = cu.affineType ? 7 : 5;
  int affineParaNum = iParaNum - 1;
  int mvNum = cu.affineType ? 3 : 2;
  double **pdEqualCoeff;
  pdEqualCoeff = new double *[iParaNum];
  for (int i = 0; i < iParaNum; i++)
  {
    pdEqualCoeff[i] = new double[iParaNum];
  }

  int64_t  i64EqualCoeff[7][7];
  Pel    *piError = m_tmpAffiError;
  Pel    *pdDerivate[2];
  pdDerivate[0] = m_tmpAffiDeri[0];
  pdDerivate[1] = m_tmpAffiDeri[1];

  Distortion uiCostBest = MAX_DISTORTION;
  uint32_t uiBitsBest = 0;

  // do motion compensation with origin mv

  clipMv(acMvTemp[0], cu.lumaPos(), cu.lumaSize(), *cu.cs->pcv);
  clipMv(acMvTemp[1], cu.lumaPos(), cu.lumaSize(), *cu.cs->pcv);
  if (cu.affineType == AFFINEMODEL_6PARAM)
  {
    clipMv(acMvTemp[2], cu.lumaPos(), cu.lumaSize(), *cu.cs->pcv);
  }

  acMvTemp[0].roundAffinePrecInternal2Amvr(cu.imv);
  acMvTemp[1].roundAffinePrecInternal2Amvr(cu.imv);
  if (cu.affineType == AFFINEMODEL_6PARAM)
  {
    acMvTemp[2].roundAffinePrecInternal2Amvr(cu.imv);
  }
  if( !m_pcEncCfg->m_ifpLines || xIsAffineMvInRangeFPP( cu, acMvTemp, m_pcEncCfg->m_ifpLines ) )
  {
    xPredAffineBlk(COMP_Y, cu, refPic, acMvTemp, predBuf, false, cu.cs->slice->clpRngs[COMP_Y], refPicList);

    // get error
    uiCostBest = m_pcRdCost->getDistPart(predBuf.Y(), pBuf->Y(), cu.cs->sps->bitDepths[CH_L], COMP_Y, DF_HAD);

    // get cost with mv
    m_pcRdCost->setCostScale(0);
    uiBitsBest = ruiBits;
    DTRACE(g_trace_ctx, D_COMMON, " (%d) xx uiBitsBest=%d\n", DTRACE_GET_COUNTER(g_trace_ctx, D_COMMON), uiBitsBest);
    uiBitsBest += xCalcAffineMVBits(cu, acMvTemp, acMvPred);
    DTRACE(g_trace_ctx, D_COMMON, " (%d) yy uiBitsBest=%d\n", DTRACE_GET_COUNTER(g_trace_ctx, D_COMMON), uiBitsBest);
    uiCostBest = (Distortion)(floor(fWeight * (double)uiCostBest) + (double)m_pcRdCost->getCost(uiBitsBest));

    DTRACE(g_trace_ctx, D_COMMON, " (%d) uiBitsBest=%d, uiCostBest=%d\n", DTRACE_GET_COUNTER(g_trace_ctx, D_COMMON), uiBitsBest, uiCostBest);

    ::memcpy(acMv, acMvTemp, sizeof(Mv) * 3);
  }
  const int predBufStride = predBuf.Y().stride;
  Mv prevIterMv[7][3];
  int iIterTime;
  if (cu.affineType == AFFINEMODEL_6PARAM)
  {
    iIterTime = bBi ? 3 : 4;
  }
  else
  {
    iIterTime = bBi ? 3 : 5;
  }

  if (!cu.cs->sps->AffineType)// getUseAffineType())
  {
    iIterTime = bBi ? 5 : 7;
  }

  for (int iter = 0; iter<iIterTime; iter++)    // iterate loop
  {
    memcpy(prevIterMv[iter], acMvTemp, sizeof(Mv) * 3);
    /*********************************************************************************
    *                         use gradient to update mv
    *********************************************************************************/
    // get Error Matrix
    PelBuf( piError, width, height ).subtract( pBuf->Y(), predBuf.Y() );

    // sobel x direction
    // -1 0 1
    // -2 0 2
    // -1 0 1
    Pel* pPred = predBuf.Y().buf;
    m_HorizontalSobelFilter(pPred, predBufStride, pdDerivate[0], width, width, height);

    // sobel y direction
    // -1 -2 -1
    //  0  0  0
    //  1  2  1
    m_VerticalSobelFilter(pPred, predBufStride, pdDerivate[1], width, width, height);

    // solve delta x and y
    for (int row = 0; row < iParaNum; row++)
    {
      memset(&i64EqualCoeff[row][0], 0, iParaNum * sizeof(int64_t));
    }

    m_EqualCoeffComputer[cu.affineType]( piError, width, pdDerivate, width, width, height, i64EqualCoeff );

    for (int row = 0; row < iParaNum; row++)
    {
      for (int i = 0; i < iParaNum; i++)
      {
        pdEqualCoeff[row][i] = (double)i64EqualCoeff[row][i];
      }
    }

    double dAffinePara[6];
    double dDeltaMv[6];
    Mv acDeltaMv[3];

    solveEqual(pdEqualCoeff, affineParaNum, dAffinePara);

    // convert to delta mv
    dDeltaMv[0] = dAffinePara[0];
    dDeltaMv[2] = dAffinePara[2];
    const bool extParams = cu.affineType == AFFINEMODEL_6PARAM;
    if (extParams)
    {
      dDeltaMv[1] = dAffinePara[1] * width + dAffinePara[0];
      dDeltaMv[3] = dAffinePara[3] * width + dAffinePara[2];
      dDeltaMv[4] = dAffinePara[4] * height + dAffinePara[0];
      dDeltaMv[5] = dAffinePara[5] * height + dAffinePara[2];
    }
    else
    {
      dDeltaMv[1] = dAffinePara[1] * width + dAffinePara[0];
      dDeltaMv[3] = -dAffinePara[3] * width + dAffinePara[2];
    }

    const int normShiftTab[3] = { MV_PRECISION_QUARTER - MV_PRECISION_INT, MV_PRECISION_SIXTEENTH - MV_PRECISION_INT, MV_PRECISION_QUARTER - MV_PRECISION_INT };
    const int stepShiftTab[3] = { MV_PRECISION_INTERNAL - MV_PRECISION_QUARTER, MV_PRECISION_INTERNAL - MV_PRECISION_SIXTEENTH, MV_PRECISION_INTERNAL - MV_PRECISION_QUARTER };
    const int multiShift = 1 << normShiftTab[cu.imv];
    const int mvShift = stepShiftTab[cu.imv];

    acDeltaMv[0] = Mv((int)(dDeltaMv[0] * multiShift + SIGN(dDeltaMv[0]) * 0.5) * (1<< mvShift), (int)(dDeltaMv[2] * multiShift + SIGN(dDeltaMv[2]) * 0.5) * (1<< mvShift));
    acDeltaMv[1] = Mv((int)(dDeltaMv[1] * multiShift + SIGN(dDeltaMv[1]) * 0.5) * (1<< mvShift), (int)(dDeltaMv[3] * multiShift + SIGN(dDeltaMv[3]) * 0.5) * (1<< mvShift));
    if (extParams)
    {
      acDeltaMv[2] = Mv((int)(dDeltaMv[4] * multiShift + SIGN(dDeltaMv[4]) * 0.5) *  (1<< mvShift), (int)(dDeltaMv[5] * multiShift + SIGN(dDeltaMv[5]) * 0.5) *  (1<< mvShift));
    }
    bool bAllZero = false;
    for (int i = 0; i < mvNum; i++)
    {
      Mv deltaMv = acDeltaMv[i];
      if (cu.imv == IMV_4PEL)
      {
        deltaMv.roundToPrecision(MV_PRECISION_INTERNAL, MV_PRECISION_HALF);
      }
      if (deltaMv.hor != 0 || deltaMv.ver != 0)
      {
        bAllZero = false;
        break;
      }
      bAllZero = true;
    }

    if (bAllZero)
      break;

    // do motion compensation with updated mv
    for (int i = 0; i < mvNum; i++)
    {
      acMvTemp[i] += acDeltaMv[i];
      acMvTemp[i].hor = Clip3(MV_MIN, MV_MAX, acMvTemp[i].hor);
      acMvTemp[i].ver = Clip3(MV_MIN, MV_MAX, acMvTemp[i].ver);
      acMvTemp[i].roundAffinePrecInternal2Amvr(cu.imv);

      clipMv(acMvTemp[i], cu.lumaPos(), cu.lumaSize(), *cu.cs->pcv);
    }

    if( !m_pcEncCfg->m_ifpLines || xIsAffineMvInRangeFPP( cu, acMvTemp, m_pcEncCfg->m_ifpLines ) )
    {
      xPredAffineBlk(COMP_Y, cu, refPic, acMvTemp, predBuf, false, cu.slice->clpRngs[COMP_Y], refPicList);

      // get error
      Distortion uiCostTemp = m_pcRdCost->getDistPart(predBuf.Y(), pBuf->Y(), cu.cs->sps->bitDepths[CH_L], COMP_Y, DF_HAD);
      DTRACE(g_trace_ctx, D_COMMON, " (%d) uiCostTemp=%d\n", DTRACE_GET_COUNTER(g_trace_ctx, D_COMMON), uiCostTemp);

      // get cost with mv
      m_pcRdCost->setCostScale(0);
      uint32_t uiBitsTemp = ruiBits;
      uiBitsTemp += xCalcAffineMVBits(cu, acMvTemp, acMvPred);
      uiCostTemp = (Distortion)(floor(fWeight * (double)uiCostTemp) + (double)m_pcRdCost->getCost(uiBitsTemp));

      // store best cost and mv
      if (uiCostTemp < uiCostBest)
      {
        uiCostBest = uiCostTemp;
        uiBitsBest = uiBitsTemp;
        memcpy(acMv, acMvTemp, sizeof(Mv) * 3);
        mvpIdx = bestMvpIdx;
      }
      else if(m_pcEncCfg->m_Affine > 1)
      {
        break;
      }
    }
  }

  auto checkCPMVRdCost = [&](Mv ctrlPtMv[3])
  {
    if( !m_pcEncCfg->m_ifpLines || xIsAffineMvInRangeFPP( cu, ctrlPtMv, m_pcEncCfg->m_ifpLines ) )
    {
      xPredAffineBlk(COMP_Y, cu, refPic, ctrlPtMv, predBuf, false, cu.slice->clpRngs[COMP_Y], refPicList);
      // get error
      Distortion costTemp = m_pcRdCost->getDistPart(predBuf.Y(), pBuf->Y(), cu.cs->sps->bitDepths[CH_L], COMP_Y, DF_HAD);
      // get cost with mv
      m_pcRdCost->setCostScale(0);
      uint32_t bitsTemp = ruiBits;
      bitsTemp += xCalcAffineMVBits(cu, ctrlPtMv, acMvPred);
      costTemp = (Distortion)(floor(fWeight * (double)costTemp) + (double)m_pcRdCost->getCost(bitsTemp));
      // store best cost and mv
      if (costTemp < uiCostBest)
      {
        uiCostBest = costTemp;
        uiBitsBest = bitsTemp;
        ::memcpy(acMv, ctrlPtMv, sizeof(Mv) * 3);
      }
    }
  };

  const uint32_t mvShiftTable[3] = { MV_PRECISION_INTERNAL - MV_PRECISION_QUARTER, MV_PRECISION_INTERNAL - MV_PRECISION_INTERNAL, MV_PRECISION_INTERNAL - MV_PRECISION_INT };
  const uint32_t mvShift = mvShiftTable[cu.imv];
  if (uiCostBest <= AFFINE_ME_LIST_MVP_TH*m_hevcCost)
  {
    Mv mvPredTmp[3] = { acMvPred[0], acMvPred[1], acMvPred[2] };
    Mv mvME[3];
    ::memcpy(mvME, acMv, sizeof(Mv) * 3);
    Mv dMv = mvME[0] - mvPredTmp[0];

    for (int j = 0; j < mvNum; j++)
    {
      if ((!j && mvME[j] != mvPredTmp[j]) || (j && mvME[j] != (mvPredTmp[j] + dMv)))
      {
        ::memcpy(acMvTemp, mvME, sizeof(Mv) * 3);
        acMvTemp[j] = mvPredTmp[j];

        if (j)
          acMvTemp[j] += dMv;

        checkCPMVRdCost(acMvTemp);
      }
    }

    //keep the rotation/zoom;
    if (mvME[0] != mvPredTmp[0])
    {
      ::memcpy(acMvTemp, mvME, sizeof(Mv) * 3);
      for (int i = 1; i < mvNum; i++)
      {
        acMvTemp[i] -= dMv;
      }
      acMvTemp[0] = mvPredTmp[0];

      checkCPMVRdCost(acMvTemp);
    }

    //keep the translation;
    if (cu.affineType == AFFINEMODEL_6PARAM && mvME[1] != (mvPredTmp[1] + dMv) && mvME[2] != (mvPredTmp[2] + dMv))
    {
      ::memcpy(acMvTemp, mvME, sizeof(Mv) * 3);

      acMvTemp[1] = mvPredTmp[1] + dMv;
      acMvTemp[2] = mvPredTmp[2] + dMv;

      checkCPMVRdCost(acMvTemp);
    }

    // 8 nearest neighbor search
    int testPos[8][2] = { { -1, 0 },{ 0, -1 },{ 0, 1 },{ 1, 0 },{ -1, -1 },{ -1, 1 },{ 1, 1 },{ 1, -1 } };
    const int maxSearchRound = 3;

    for (int rnd = 0; rnd < maxSearchRound; rnd++)
    {
      bool modelChange = false;
      //search the model parameters with finear granularity;
      for (int j = 0; j < mvNum; j++)
      {
        bool loopChange = false;
        for (int iter = 0; iter < 2; iter++)
        {
          if (iter == 1 && !loopChange)
          {
            break;
          }
          Mv centerMv[3];
          memcpy(centerMv, acMv, sizeof(Mv) * 3);
          memcpy(acMvTemp, acMv, sizeof(Mv) * 3);

          for (int i = ((iter == 0) ? 0 : 4); i < ((iter == 0) ? 4 : 8); i++)
          {
            acMvTemp[j].set(centerMv[j].hor + (testPos[i][0] * (1 << mvShift)), centerMv[j].ver + (testPos[i][1] * (1 << mvShift)));
            clipMv(acMvTemp[j], cu.lumaPos(), cu.lumaSize(), *cu.cs->pcv);

            if( !m_pcEncCfg->m_ifpLines || xIsAffineMvInRangeFPP( cu, acMvTemp, m_pcEncCfg->m_ifpLines ) )
            {
              xPredAffineBlk(COMP_Y, cu, refPic, acMvTemp, predBuf, false, cu.slice->clpRngs[COMP_Y], refPicList);

              Distortion costTemp = m_pcRdCost->getDistPart(predBuf.Y(), pBuf->Y(), cu.cs->sps->bitDepths[CH_L], COMP_Y, DF_HAD);
              uint32_t bitsTemp = ruiBits;
              bitsTemp += xCalcAffineMVBits(cu, acMvTemp, acMvPred);
              costTemp = (Distortion)(floor(fWeight * (double)costTemp) + (double)m_pcRdCost->getCost(bitsTemp));

              if (costTemp < uiCostBest)
              {
                uiCostBest = costTemp;
                uiBitsBest = bitsTemp;
                ::memcpy(acMv, acMvTemp, sizeof(Mv) * 3);
                modelChange = true;
                loopChange = true;
              }
            }
          }
        }
      }

      if (!modelChange)
      {
        break;
      }
    }
  }
  acMvPred[0] = aamvpi.mvCandLT[mvpIdx];
  acMvPred[1] = aamvpi.mvCandRT[mvpIdx];
  acMvPred[2] = aamvpi.mvCandLB[mvpIdx];

  // free buffer
  for (int i = 0; i<iParaNum; i++)
    delete[]pdEqualCoeff[i];
  delete[]pdEqualCoeff;

  ruiBits = uiBitsBest;
  ruiCost = uiCostBest;
  DTRACE(g_trace_ctx, D_COMMON, " (%d) uiBitsBest=%d, uiCostBest=%d\n", DTRACE_GET_COUNTER(g_trace_ctx, D_COMMON), uiBitsBest, uiCostBest);
}

bool InterSearch::xEstimateAffineAMVP(CodingUnit& cu, AffineAMVPInfo& affineAMVPInfo, CPelUnitBuf& origBuf, RefPicList refPicList, int iRefIdx, Mv acMvPred[3], Distortion& distBiP)
{
  Mv         bestMvLT, bestMvRT, bestMvLB;
  int        iBestIdx = 0;
  Distortion uiBestCost = MAX_DISTORTION;

  // Fill the MV Candidates
  CU::fillAffineMvpCand(cu, refPicList, iRefIdx, affineAMVPInfo);
  CHECK(affineAMVPInfo.numCand == 0, "Assertion failed.");

  PelUnitBuf predBuf = m_tmpStorageLCU.getCompactBuf( cu );

  bool stop_check = false;
  if (affineAMVPInfo.mvCandLT[0] == affineAMVPInfo.mvCandLT[1])
  {
    if ((affineAMVPInfo.mvCandRT[0] == affineAMVPInfo.mvCandRT[1]) && (affineAMVPInfo.mvCandLB[0] == affineAMVPInfo.mvCandLB[1]))
    {
      stop_check = true;
    }
  }

  // initialize Mvp index & Mvp
  iBestIdx = -1;
  for (int i = 0; i < affineAMVPInfo.numCand; i++)
  {
    if (i && stop_check)
    {
      continue;
    }
    Mv mv[3] = { affineAMVPInfo.mvCandLT[i], affineAMVPInfo.mvCandRT[i], affineAMVPInfo.mvCandLB[i] };
    Distortion uiTmpCost = xGetAffineTemplateCost(cu, origBuf, predBuf, mv, i, AMVP_MAX_NUM_CANDS, refPicList, iRefIdx);

    if (uiBestCost > uiTmpCost)
    {
      uiBestCost = uiTmpCost;
      bestMvLT = affineAMVPInfo.mvCandLT[i];
      bestMvRT = affineAMVPInfo.mvCandRT[i];
      bestMvLB = affineAMVPInfo.mvCandLB[i];
      iBestIdx = i;
      distBiP  = uiTmpCost;
    }
  }

  if( iBestIdx < 0 )
    return false;

  // Setting Best MVP
  acMvPred[0] = bestMvLT;
  acMvPred[1] = bestMvRT;
  acMvPred[2] = bestMvLB;

  cu.mvpIdx[refPicList] = iBestIdx;
  cu.mvpNum[refPicList] = affineAMVPInfo.numCand;
  DTRACE(g_trace_ctx, D_COMMON, "#estAffi=%d \n", affineAMVPInfo.numCand);
  return true;
}

void InterSearch::xCopyAffineAMVPInfo(AffineAMVPInfo& src, AffineAMVPInfo& dst)
{
  dst.numCand = src.numCand;
  DTRACE(g_trace_ctx, D_COMMON, " (%d) #copyAffi=%d \n", DTRACE_GET_COUNTER(g_trace_ctx, D_COMMON), src.numCand);
  ::memcpy(dst.mvCandLT, src.mvCandLT, sizeof(Mv)*src.numCand);
  ::memcpy(dst.mvCandRT, src.mvCandRT, sizeof(Mv)*src.numCand);
  ::memcpy(dst.mvCandLB, src.mvCandLB, sizeof(Mv)*src.numCand);
}

uint32_t InterSearch::xCalcAffineMVBits(CodingUnit& cu, Mv acMvTemp[3], Mv acMvPred[3])
{
  int mvNum = cu.affineType ? 3 : 2;
  m_pcRdCost->setCostScale(0);
  uint32_t bitsTemp = 0;

  for (int verIdx = 0; verIdx < mvNum; verIdx++)
  {
    Mv pred = verIdx == 0 ? acMvPred[verIdx] : acMvPred[verIdx] + acMvTemp[0] - acMvPred[0];
    pred.changeAffinePrecInternal2Amvr(cu.imv);
    m_pcRdCost->setPredictor(pred);
    Mv mv = acMvTemp[verIdx];
    mv.changeAffinePrecInternal2Amvr(cu.imv);

    bitsTemp += m_pcRdCost->getBitsOfVectorWithPredictor(mv.hor, mv.ver, 0);
  }

  return bitsTemp;
}


//! set adaptive search range based on poc difference
void InterSearch::setSearchRange( const Slice* slice, const VVEncCfg& encCfg )
{
  if( !encCfg.m_bUseASR || slice->isIRAP() )
  {
    return;
  }

  int iCurrPOC = slice->poc;
  int iRefPOC;
  int iGOPSize = encCfg.m_GOPSize;
  int iOffset = (iGOPSize >> 1);
  int iMaxSR = encCfg.m_SearchRange;
  int iNumPredDir = slice->isInterP() ? 1 : 2;

  for (int iDir = 0; iDir < iNumPredDir; iDir++)
  {
    RefPicList  e = ( iDir ? REF_PIC_LIST_1 : REF_PIC_LIST_0 );
    for (int iRefIdx = 0; iRefIdx < slice->numRefIdx[e]; iRefIdx++)
    {
      iRefPOC = slice->getRefPic(e, iRefIdx)->getPOC();
      int newSearchRange = Clip3(encCfg.m_minSearchWindow, iMaxSR, (iMaxSR*ADAPT_SR_SCALE*abs(iCurrPOC - iRefPOC)+iOffset)/iGOPSize);
      m_aaiAdaptSR[iDir][iRefIdx] = newSearchRange;
    }
  }
}

void InterSearch::xIBCSearchMVCandUpdate(Distortion  sad, int x, int y, Distortion* sadBestCand, Mv* cMVCand)
{
  int j = CHROMA_REFINEMENT_CANDIDATES - 1;

  if (sad < sadBestCand[CHROMA_REFINEMENT_CANDIDATES - 1])
  {
    for (int t = CHROMA_REFINEMENT_CANDIDATES - 1; t >= 0; t--)
    {
      if (sad < sadBestCand[t])
        j = t;
    }

    for (int k = CHROMA_REFINEMENT_CANDIDATES - 1; k > j; k--)
    {
      sadBestCand[k] = sadBestCand[k - 1];

      cMVCand[k].set(cMVCand[k - 1].hor, cMVCand[k - 1].ver);
    }
    sadBestCand[j] = sad;
    cMVCand[j].set(x, y);
  }
}

int InterSearch::xIBCSearchMVChromaRefine(CodingUnit& cu,
  int         roiWidth,
  int         roiHeight,
  int         cuPelX,
  int         cuPelY,
  Distortion* sadBestCand,
  Mv* cMVCand

)
{
  if ((!isChromaEnabled(cu.chromaFormat)) || (!cu.Cb().valid()))
  {
    return 0;
  }

  int bestCandIdx = 0;
  Distortion  sadBest = std::numeric_limits<Distortion>::max();
  Distortion  tempSad;

  Pel* pRef;
  Pel* pOrg;
  int refStride, orgStride;
  int width, height;

  int picWidth = cu.cs->slice->pps->picWidthInLumaSamples;
  int picHeight = cu.cs->slice->pps->picHeightInLumaSamples;

  UnitArea allCompBlocks(cu.chromaFormat, (Area)cu.block(COMP_Y));
  for (int cand = 0; cand < CHROMA_REFINEMENT_CANDIDATES; cand++)
  {
    if (sadBestCand[cand] == std::numeric_limits<Distortion>::max())
    {
      continue;
    }

    if ((!cMVCand[cand].hor) && (!cMVCand[cand].ver))
      continue;

    if (((int)(cuPelY + cMVCand[cand].ver + roiHeight) >= picHeight) || ((cuPelY + cMVCand[cand].ver) < 0))
      continue;

    if (((int)(cuPelX + cMVCand[cand].hor + roiWidth) >= picWidth) || ((cuPelX + cMVCand[cand].hor) < 0))
      continue;

    tempSad = sadBestCand[cand];

    cu.mv[0][0] = cMVCand[cand];
    cu.mv[0][0].changePrecision(MV_PRECISION_INT, MV_PRECISION_INTERNAL);
    cu.interDir = 1;
    cu.refIdx[0] = cu.cs->slice->numRefIdx[REF_PIC_LIST_0]; // last idx in the list

    PelUnitBuf predBufTmp = m_tmpPredStorage[REF_PIC_LIST_0].getCompactBuf(cu);
    motionCompensation(cu, predBufTmp, REF_PIC_LIST_0);

    for (unsigned int ch = COMP_Cb; ch < getNumberValidComponents(cu.cs->sps->chromaFormatIdc); ch++)
    {
      width = roiWidth >> getComponentScaleX(ComponentID(ch), cu.chromaFormat);
      height = roiHeight >> getComponentScaleY(ComponentID(ch), cu.chromaFormat);

      PelUnitBuf origBuf = cu.cs->getOrgBuf(allCompBlocks);
      PelUnitBuf* pBuf = &origBuf;
      CPelBuf  tmpPattern = pBuf->get(ComponentID(ch));
      pOrg = (Pel*)tmpPattern.buf;

      Picture* refPic = cu.slice->pic;
      const CPelBuf refBuf = refPic->getRecoBuf(allCompBlocks.blocks[ComponentID(ch)]);
      pRef = (Pel*)refBuf.buf;

      refStride = refBuf.stride;
      orgStride = tmpPattern.stride;

      //ComponentID compID = (ComponentID)ch;
      PelUnitBuf* pBufRef = &predBufTmp;
      CPelBuf  tmpPatternRef = pBufRef->get(ComponentID(ch));
      pRef = (Pel*)tmpPatternRef.buf;
      refStride = tmpPatternRef.stride;


      tempSad += m_bvSearchOps.sumAbsDiffShifted( pOrg, orgStride, pRef, refStride, width, height, cu.cs->sps->bitDepths[CH_C] - 8 );
    }

    if (tempSad < sadBest)
    {
      sadBest = tempSad;
      bestCandIdx = cand;
    }
  }

  return bestCandIdx;
}
// appends the non-zero candidates of src that are not in dst yet, up to dstTotalLength entries in dst
unsigned InterSearch::xMergeCandLists( Mv* dst, unsigned dn, const unsigned dstTotalLength, const Mv* src, const unsigned sn ) const
{
  for( unsigned cand = 0; cand < sn && dn < dstTotalLength; cand++ )
  {
    if( src[cand] != Mv() && !m_bvSearchOps.containsMv( dst, dn, src[cand] ) )
    {
      dst[dn++] = src[cand];
    }
  }

  return dn;
}

const unsigned* InterSearch::xGetBvBitsRow( const int x0, const int xStep, const int count, const int y, const bool useIMV )
{
  if( count <= 0 )
  {
    return nullptr;
  }
  m_bvBits.resize( std::max<size_t>( m_bvBits.size(), count ) );
  m_pcRdCost->getBvBitsRowIBC( x0, xStep, count, y, useIMV, m_bvBits.data() );
  return m_bvBits.data();
}

const unsigned* InterSearch::xGetBvBitsColumn( const int x, const int y0, const int yStep, const int count, const bool useIMV )
{
  if( count <= 0 )
  {
    return nullptr;
  }
  m_bvBits.resize( std::max<size_t>( m_bvBits.size(), count ) );
  m_pcRdCost->getBvBitsColumnIBC( x, y0, yStep, count, useIMV, m_bvBits.data() );
  return m_bvBits.data();
}

void InterSearch::xIntraPatternSearchIBC(CodingUnit& cu, TZSearchStruct& cStruct, Mv& rcMv, Distortion& ruiCost, Mv* pcMvSrchRngLT, Mv* pcMvSrchRngRB, Mv* pcMvPred)
{
  const int   srchRngHorLeft = pcMvSrchRngLT->hor;
  const int   srchRngHorRight = pcMvSrchRngRB->hor;
  const int   srchRngVerTop = pcMvSrchRngLT->ver;
  const int   srchRngVerBottom = pcMvSrchRngRB->ver;

  const unsigned int  lcuWidth = cu.cs->slice->sps->CTUSize;
  const int   puPelOffsetX = 0;
  const int   puPelOffsetY = 0;
  const int   cuPelX = cu.Y().x;
  const int   cuPelY = cu.Y().y;

  int          roiWidth = cu.lwidth();
  int          roiHeight = cu.lheight();

  Distortion  sad;
  Distortion  sadBest = std::numeric_limits<Distortion>::max();
  int         bestX = 0;
  int         bestY = 0;

  const Pel* piRefSrch = cStruct.piRefY; 

  int         bestCandIdx = 0;

  Distortion  sadBestCand[CHROMA_REFINEMENT_CANDIDATES];
  Mv          cMVCand[CHROMA_REFINEMENT_CANDIDATES];

  const bool  useAmvr = cu.cs->sps->AMVR;


  for (int cand = 0; cand < CHROMA_REFINEMENT_CANDIDATES; cand++)
  {
    sadBestCand[cand] = std::numeric_limits<Distortion>::max();
    cMVCand[cand].set(0, 0);
  }

  m_pcRdCost->setDistParam(m_cDistParam, *cStruct.pcPatternKey, cStruct.piRefY, cStruct.iRefStride, m_lumaClpRng.bd, COMP_Y, cStruct.subShiftMode);

  const int picWidth = cu.cs->slice->pps->picWidthInLumaSamples;
  const int picHeight = cu.cs->slice->pps->picHeightInLumaSamples;


  {
    m_cDistParam.subShift = 0;
    Distortion tempSadBest = 0;

    int srLeft = srchRngHorLeft, srRight = srchRngHorRight, srTop = srchRngVerTop, srBottom = srchRngVerBottom;
    m_numBVs = 0;
    m_numBVs = xMergeCandLists(m_acBVs, m_numBVs, (2 * IBC_NUM_CANDIDATES), m_defaultCachedBvs->m_bvCands, m_defaultCachedBvs->currCnt);

    Mv cMvPredEncOnly[IBC_NUM_CANDIDATES];
    int nbPreds = 0;
    CU::getIbcMVPsEncOnly(cu, cMvPredEncOnly, nbPreds);
    m_numBVs = xMergeCandLists(m_acBVs, m_numBVs, (2 * IBC_NUM_CANDIDATES), cMvPredEncOnly, nbPreds);

    for (unsigned int cand = 0; cand < m_numBVs; cand++)
    {
      int xPred = m_acBVs[cand].hor;
      int yPred = m_acBVs[cand].ver;

      if (!(xPred == 0 && yPred == 0)
        && !((yPred < srTop) || (yPred > srBottom))
        && !((xPred < srLeft) || (xPred > srRight)))
      {
        bool validCand = searchBvIBC(cu, cuPelX, cuPelY, roiWidth, roiHeight, picWidth, picHeight, xPred, yPred, lcuWidth);

        if (validCand)
        {
          sad = m_pcRdCost->getBvCostMultiplePredsIBC(xPred, yPred, useAmvr);
          m_cDistParam.cur.buf = piRefSrch + cStruct.iRefStride * yPred + xPred;
          sad += m_cDistParam.distFunc(m_cDistParam);

          xIBCSearchMVCandUpdate(sad, xPred, yPred, sadBestCand, cMVCand);
        }
      }
    }

    bestX = cMVCand[0].hor;
    bestY = cMVCand[0].ver;
    rcMv.set(bestX, bestY);
    sadBest = sadBestCand[0];

    const int boundY = (0 - roiHeight - puPelOffsetY);
    const int aboveStartY = std::max(srchRngVerTop, 0 - cuPelY);
    const unsigned* bvBitsAbove = xGetBvBitsColumn( 0, aboveStartY, 1, boundY - aboveStartY + 1, useAmvr );
    for (int y = aboveStartY; y <= boundY; ++y)
    {
      if (!searchBvIBC(cu, cuPelX, cuPelY, roiWidth, roiHeight, picWidth, picHeight, 0, y, lcuWidth))
      {
        continue;
      }

      sad = m_pcRdCost->getBvCostIBC( bvBitsAbove[y - aboveStartY] );
      m_cDistParam.cur.buf = piRefSrch + cStruct.iRefStride * y;
      sad += m_cDistParam.distFunc(m_cDistParam);

      xIBCSearchMVCandUpdate(sad, 0, y, sadBestCand, cMVCand);
      tempSadBest = sadBestCand[0];
      if (sadBestCand[0] <= 3)
      {
        bestX = cMVCand[0].hor;
        bestY = cMVCand[0].ver;
        sadBest = sadBestCand[0];
        rcMv.set(bestX, bestY);
        ruiCost = sadBest;
        goto end;
      }
    }

    const int boundX = std::max(srchRngHorLeft, -cuPelX);
    const int leftStartX = 0 - roiWidth - puPelOffsetX;
    const unsigned* bvBitsLeft = xGetBvBitsRow( leftStartX, -1, leftStartX - boundX + 1, 0, useAmvr );
    for (int x = leftStartX; x >= boundX; --x)
    {
      if (!searchBvIBC(cu, cuPelX, cuPelY, roiWidth, roiHeight, picWidth, picHeight, x, 0, lcuWidth))
      {
        continue;
      }

      sad = m_pcRdCost->getBvCostIBC( bvBitsLeft[leftStartX - x] );
      m_cDistParam.cur.buf = piRefSrch + x;
      sad += m_cDistParam.distFunc(m_cDistParam);


      xIBCSearchMVCandUpdate(sad, x, 0, sadBestCand, cMVCand);
      tempSadBest = sadBestCand[0];
      if (sadBestCand[0] <= 3)
      {
        bestX = cMVCand[0].hor;
        bestY = cMVCand[0].ver;
        sadBest = sadBestCand[0];
        rcMv.set(bestX, bestY);
        ruiCost = sadBest;
        goto end;
      }
    }

    bestX = cMVCand[0].hor;
    bestY = cMVCand[0].ver;
    sadBest = sadBestCand[0];
    if ((!bestX && !bestY) || (sadBest - m_pcRdCost->getBvCostMultiplePredsIBC(bestX, bestY, useAmvr) <= 32))
    {
      //chroma refine
      bestCandIdx = xIBCSearchMVChromaRefine(cu, roiWidth, roiHeight, cuPelX, cuPelY, sadBestCand, cMVCand);
      bestX = cMVCand[bestCandIdx].hor;
      bestY = cMVCand[bestCandIdx].ver;
      sadBest = sadBestCand[bestCandIdx];
      rcMv.set(bestX, bestY);
      ruiCost = sadBest;
      goto end;
    }

    if (cu.lwidth() < 16 && cu.lheight() < 16)
    {
      int stepS = 2;
      if (m_pcEncCfg->m_IBCFastMethod > 2)
      {
        if (m_pcEncCfg->m_IBCFastMethod == 5)
        {
          stepS = 8;
        }
        else if ((cu.lwidth() > 4) || (cu.lheight() > 4))
        {
          stepS = 4;
        }
      }

      const int minCuLog2 = m_pcEncCfg->m_log2MinCodingBlockSize;
      const int minCuMask = (1 << minCuLog2) - 1;
      bool lastDec = false;

      for (int searchStep = 0; searchStep < 3; searchStep++)
      {
        int delaySy = searchStep ? 1 : 0;
        int delaySx = searchStep > 1 ? 1 : 0;
        int startY = (std::max(srchRngVerTop, -cuPelY) + delaySy);
        int startX = (std::max(srchRngHorLeft, -cuPelX) + delaySx);
        int endY = srchRngVerBottom;
        int endX = srchRngHorRight;

        if (m_pcEncCfg->m_IBCFastMethod > 5)
        {
          startY = bestY - 4;
          endY = bestY + 4;
          startX = bestX - 4;
          endX = bestX + 4;
          stepS = 1;
          if (searchStep)
          {
            break;
          }
        }

        for (int y = startY; y <= endY; y += stepS)
        {
          if ((y == 0) || ((int)(cuPelY + y + roiHeight) >= picHeight))
            continue;
          bool firstX = true;
          int stepSx = searchStep ? stepS : 1;
          const unsigned* bvBitsRow = xGetBvBitsRow( startX, stepSx, ( endX - startX ) / stepSx + 1, y, useAmvr );
          for (int x = startX, k = 0; x <= endX; firstX = false, x += stepSx, k++)
          {
            if ((x == 0) || ((int)(cuPelX + x + roiWidth) >= picWidth))
              continue;

            bool isSameAsLast = !firstX && ((cuPelX + x) & minCuMask) > 1;
            if (searchStep || (m_pcEncCfg->m_IBCFastMethod > 5))
            {
              if (!searchBvIBC(cu, cuPelX, cuPelY, roiWidth, roiHeight, picWidth, picHeight, x, y, lcuWidth))
              {
                continue;
              }
            }
            else if ((isSameAsLast && !lastDec) || (!isSameAsLast && !searchBvIBC(cu, cuPelX, cuPelY, roiWidth, roiHeight, picWidth, picHeight, x, y, lcuWidth)))
            {
              lastDec = false;
              continue;
            }
            lastDec = true;

            sad = m_pcRdCost->getBvCostIBC( bvBitsRow[k] );
            m_cDistParam.cur.buf = piRefSrch + cStruct.iRefStride * y + x;
            sad += m_cDistParam.distFunc(m_cDistParam);

            xIBCSearchMVCandUpdate(sad, x, y, sadBestCand, cMVCand);


            if (searchStep && sadBestCand[0] <= 5)
            {
              //chroma refine & return
              bestCandIdx = xIBCSearchMVChromaRefine(cu, roiWidth, roiHeight, cuPelX, cuPelY, sadBestCand, cMVCand);
              bestX = cMVCand[bestCandIdx].hor;
              bestY = cMVCand[bestCandIdx].ver;
              sadBest = sadBestCand[bestCandIdx];
              rcMv.set(bestX, bestY);
              ruiCost = sadBest;
              goto end;
            }
          }
        }

        if ((searchStep < 2) && (m_pcEncCfg->m_IBCFastMethod < 6))
        {
          if ((m_pcEncCfg->m_IBCFastMethod > 2) && (m_pcEncCfg->m_IBCFastMethod < 5))
          {
            if ((bestX == cMVCand[0].hor) && (bestY == cMVCand[0].ver))
            {
              sadBest = sadBestCand[bestCandIdx];
              rcMv.set(bestX, bestY);
              ruiCost = sadBest;
              goto end;
            }
          }
          bestX = cMVCand[0].hor;
          bestY = cMVCand[0].ver;
          sadBest = sadBestCand[0];

          int StopSearch = searchStep ? 32 : 16;
          if ((searchStep && (sadBest >= tempSadBest)) || (sadBest - m_pcRdCost->getBvCostMultiplePredsIBC(bestX, bestY, useAmvr) <= StopSearch))
          {
            //chroma refine
            bestCandIdx = xIBCSearchMVChromaRefine(cu, roiWidth, roiHeight, cuPelX, cuPelY, sadBestCand, cMVCand);

            bestX = cMVCand[bestCandIdx].hor;
            bestY = cMVCand[bestCandIdx].ver;
            sadBest = sadBestCand[bestCandIdx];
            rcMv.set(bestX, bestY);
            ruiCost = sadBest;
            goto end;
          }
        }
      }
    }
  }

  bestCandIdx = xIBCSearchMVChromaRefine(cu, roiWidth, roiHeight, cuPelX, cuPelY, sadBestCand, cMVCand);

  bestX = cMVCand[bestCandIdx].hor;
  bestY = cMVCand[bestCandIdx].ver;
  sadBest = sadBestCand[bestCandIdx];
  rcMv.set(bestX, bestY);
  ruiCost = sadBest;

end:
  m_numBVs = 0;
  m_numBVs = xMergeCandLists(m_acBVs, m_numBVs, (2 * IBC_NUM_CANDIDATES), m_defaultCachedBvs->m_bvCands, m_defaultCachedBvs->currCnt);

  m_defaultCachedBvs->currCnt = 0;
  m_defaultCachedBvs->currCnt = xMergeCandLists(m_defaultCachedBvs->m_bvCands, m_defaultCachedBvs->currCnt, IBC_NUM_CANDIDATES, cMVCand, CHROMA_REFINEMENT_CANDIDATES);
  m_defaultCachedBvs->currCnt = xMergeCandLists(m_defaultCachedBvs->m_bvCands, m_defaultCachedBvs->currCnt, IBC_NUM_CANDIDATES, m_acBVs, m_numBVs);

  for (unsigned int cand = 0; cand < CHROMA_REFINEMENT_CANDIDATES; cand++)
  {
    if (cMVCand[cand].hor == 0 && cMVCand[cand].ver == 0)
    {
      continue;
    }
    m_ctuRecord[cu.lumaPos()][cu.lumaSize()].bvRecord[cMVCand[cand]] = sadBestCand[cand];
  }

  return;
}



// based on xMotionEstimation
void InterSearch::xIBCEstimation(CodingUnit& cu, PelUnitBuf& origBuf, Mv* pcMvPred, Mv& rcMv, Distortion& ruiCost )
{
  const int iPicWidth = cu.cs->slice->pps->picWidthInLumaSamples;
  const int iPicHeight = cu.cs->slice->pps->picHeightInLumaSamples;
  const unsigned int  lcuWidth = cu.cs->slice->sps->CTUSize;
  const int           cuPelX = cu.Y().x;
  const int           cuPelY = cu.Y().y;
  int                 iRoiWidth = cu.lwidth();
  int                 iRoiHeight = cu.lheight();

  PelUnitBuf* pBuf = &origBuf;

  //  Search key pattern initialization
  CPelBuf  tmpPattern = pBuf->Y();
  CPelBuf* pcPatternKey = &tmpPattern;
  m_lumaClpRng = cu.cs->slice->clpRngs[COMP_Y];
  Picture* refPic = cu.slice->pic;
  const CPelBuf refBuf = refPic->getRecoBuf(cu.blocks[COMP_Y]);

  TZSearchStruct cStruct; 
  cStruct.pcPatternKey  = pcPatternKey;
  cStruct.iRefStride    = refBuf.stride;
  cStruct.piRefY        = refBuf.buf;
  CHECK( cu.imv == IMV_HPEL, "IF_IBC" );
  cStruct.imvShift      = cu.imv << 1;
  cStruct.subShiftMode  = 0;
  cStruct.uiBestSad     = MAX_DISTORTION;

  m_pcRdCost->getMotionCostIBC(0);
  m_pcRdCost->setPredictorsIBC(pcMvPred);
  m_pcRdCost->setCostScale(0);

  m_pcRdCost->setDistParam(m_cDistParam, *cStruct.pcPatternKey, cStruct.piRefY, cStruct.iRefStride, m_lumaClpRng.bd, COMP_Y, cStruct.subShiftMode);
  bool buffered = false;
  if (m_pcEncCfg->m_IBCFastMethod)// IBC_FAST_METHOD_BUFFERBV
  {
    ruiCost = MAX_UINT;
    std::unordered_map<Mv, Distortion>& history = m_ctuRecord[cu.lumaPos()][cu.lumaSize()].bvRecord;
    for (std::unordered_map<Mv, Distortion>::iterator p = history.begin(); p != history.end(); p++)
    {
      const Mv& bv = p->first;

      int xBv = bv.hor;
      int yBv = bv.ver;
      if (searchBvIBC(cu, cuPelX, cuPelY, iRoiWidth, iRoiHeight, iPicWidth, iPicHeight, xBv, yBv, lcuWidth))
      {
        buffered = true;
        Distortion sad = m_pcRdCost->getBvCostMultiplePredsIBC(xBv, yBv, cu.cs->sps->AMVR);
        m_cDistParam.cur.buf = cStruct.piRefY + cStruct.iRefStride * yBv + xBv;
        sad += m_cDistParam.distFunc(m_cDistParam);
        if (sad < ruiCost)
        {
          rcMv = bv;
          ruiCost = sad;
        }
        else if (sad == ruiCost)
        {
          // stabilise the search through the unordered list
          if (bv.hor < rcMv.hor
            || (bv.hor == rcMv.hor && bv.ver < rcMv.ver))
          {
            // update the vector.
            rcMv = bv;
          }
        }
      }
    }

    if (buffered)
    {
      Mv cMvPredEncOnly[IBC_NUM_CANDIDATES];
      int nbPreds = 0;
      CU::getIbcMVPsEncOnly(cu, cMvPredEncOnly, nbPreds);

      for (unsigned int cand = 0; cand < nbPreds; cand++)
      {
        int xPred = cMvPredEncOnly[cand].hor;
        int yPred = cMvPredEncOnly[cand].ver;

        if (searchBvIBC(cu, cuPelX, cuPelY, iRoiWidth, iRoiHeight, iPicWidth, iPicHeight, xPred, yPred, lcuWidth))
        {
          Distortion sad = m_pcRdCost->getBvCostMultiplePredsIBC(xPred, yPred, cu.cs->sps->AMVR);
          m_cDistParam.cur.buf = cStruct.piRefY + cStruct.iRefStride * yPred + xPred;
          sad += m_cDistParam.distFunc(m_cDistParam);
          if (sad < ruiCost)
          {
            rcMv.set(xPred, yPred);
            ruiCost = sad;
          }
          else if (sad == ruiCost)
          {
            // stabilise the search through the unordered list
            if (xPred < rcMv.hor
              || (xPred == rcMv.hor && yPred < rcMv.ver))
            {
              // update the vector.
              rcMv.set(xPred, yPred);
            }
          }
          m_ctuRecord[cu.lumaPos()][cu.lumaSize()].bvRecord[Mv(xPred, yPred)] = sad;
        }
      }
    }
  }

  if (!buffered)
  {
    Mv        cMvSrchRngLT;
    Mv        cMvSrchRngRB;

    // assume that intra BV is integer-pel precision
    xSetIntraSearchRangeIBC(cu, cu.lwidth(), cu.lheight(), cMvSrchRngLT, cMvSrchRngRB);

    //  Do integer search
    xIntraPatternSearchIBC(cu, cStruct, rcMv, ruiCost, &cMvSrchRngLT, &cMvSrchRngRB, pcMvPred);
  }
}
// based on xSetSearchRange
void InterSearch::xSetIntraSearchRangeIBC(CodingUnit& cu, int iRoiWidth, int iRoiHeight, Mv& rcMvSrchRngLT, Mv& rcMvSrchRngRB)
{
 // const SPS& sps = *cu.cs->sps;

  int srLeft, srRight, srTop, srBottom;

  const int cuPelX = cu.Y().x;
  const int cuPelY = cu.Y().y;

  const int lcuWidth = cu.cs->slice->sps->CTUSize;
  const int ctuSizeLog2 = floorLog2(lcuWidth);
  int numLeftCTUs = (1 << ((7 - ctuSizeLog2) << 1)) - ((ctuSizeLog2 < 7) ? 1 : 0);

  srLeft = -(numLeftCTUs * lcuWidth + (cuPelX % lcuWidth));
  srTop = -(cuPelY % lcuWidth);

  srRight = lcuWidth - (cuPelX % lcuWidth) - iRoiWidth;
  srBottom = lcuWidth - (cuPelY % lcuWidth) - iRoiHeight;

  rcMvSrchRngLT.hor=srLeft;
  rcMvSrchRngLT.ver=srTop;
  rcMvSrchRngRB.hor=srRight;
  rcMvSrchRngRB.ver=srBottom;

  rcMvSrchRngLT <<= 2;
  rcMvSrchRngRB <<= 2;
  bool temp = m_clipMvInSubPic;
  m_clipMvInSubPic = true;
  clipMv(rcMvSrchRngLT,cu.lumaPos(),cu.lumaSize(), *cu.cs->pcv, *cu.cs->pps, m_clipMvInSubPic);
  clipMv(rcMvSrchRngRB, cu.lumaPos(),cu.lumaSize(), *cu.cs->pcv, * cu.cs->pps, m_clipMvInSubPic);
  m_clipMvInSubPic = temp;
  rcMvSrchRngLT >>= 2;
  rcMvSrchRngRB >>= 2;
}

bool InterSearch::predIBCSearch(CodingUnit& cu, Partitioner& partitioner)
{
  Mv           cMvSrchRngLT;
  Mv           cMvSrchRngRB;
  cu.imv = IMV_4PEL;
  AMVPInfo amvpInfo4Pel;
  CU::fillIBCMvpCand(cu, amvpInfo4Pel);

  cu.imv = IMV_OFF;// (Int)cu.cs->sps->getUseIMV(); // set as IMV=0 initially
  Mv    cMv, cMvPred[2];
  AMVPInfo amvpInfo;
  CU::fillIBCMvpCand(cu, amvpInfo);
  // store in full pel accuracy, shift before use in search
  cMvPred[0] = amvpInfo.mvCand[0];
  cMvPred[0].changePrecision(MV_PRECISION_INTERNAL, MV_PRECISION_INT);
  cMvPred[1] = amvpInfo.mvCand[1];
  cMvPred[1].changePrecision(MV_PRECISION_INTERNAL, MV_PRECISION_INT);

  int iBvpNum = 2;
  int bvpIdxBest = 0;
  cMv.setZero();
  Distortion cost = 0;
  if (cu.cs->sps->maxNumIBCMergeCand == 1)
  {
    iBvpNum = 1;
    cMvPred[1] = cMvPred[0];
  }

  if (cMv.hor == 0 && cMv.ver == 0)
  {
    // if hash search does not work or is not enabled
    PelUnitBuf origBuf = cu.cs->getOrgBuf(cu);
    xIBCEstimation(cu, origBuf, cMvPred, cMv, cost );
  }

  if (cMv.hor == 0 && cMv.ver == 0)
  {
    return false;
  }
  /// ibc search
  /////////////////////////////////////////////////////////
  unsigned int bitsBVPBest, bitsBVPTemp;
  bitsBVPBest = MAX_INT;
  m_pcRdCost->setCostScale(0);

  for (int bvpIdxTemp = 0; bvpIdxTemp < iBvpNum; bvpIdxTemp++)
  {
    m_pcRdCost->setPredictor(cMvPred[bvpIdxTemp]);

    bitsBVPTemp = m_pcRdCost->getBitsOfVectorWithPredictor(cMv.hor, cMv.ver, 0);

    if (bitsBVPTemp < bitsBVPBest)
    {
      bitsBVPBest = bitsBVPTemp;
      bvpIdxBest = bvpIdxTemp;

      if (cu.cs->sps->AMVR && cMv != cMvPred[bvpIdxTemp])
        cu.imv = IMV_FPEL; // set as full-pel
      else
        cu.imv = IMV_OFF; // set as fractional-pel

    }

    unsigned int bitsBVPQP = MAX_UINT;


    Mv mvPredQuadPel;
    if ((cMv.hor % 4 == 0) && (cMv.ver % 4 == 0) && (cu.cs->sps->AMVR))
    {
      mvPredQuadPel = amvpInfo4Pel.mvCand[bvpIdxTemp];// cMvPred[bvpIdxTemp];

      mvPredQuadPel.changePrecision(MV_PRECISION_INTERNAL, MV_PRECISION_4PEL);

      m_pcRdCost->setPredictor(mvPredQuadPel);

      bitsBVPQP = m_pcRdCost->getBitsOfVectorWithPredictor(cMv.hor >> 2, cMv.ver >> 2, 0);

    }
    mvPredQuadPel.changePrecision(MV_PRECISION_4PEL, MV_PRECISION_INT);
    if (bitsBVPQP < bitsBVPBest && cMv != mvPredQuadPel)
    {
      bitsBVPBest = bitsBVPQP;
      bvpIdxBest = bvpIdxTemp;

      if (cu.cs->sps->AMVR)
        cu.imv = IMV_4PEL;
    }

  }

  cMv.changePrecision( MV_PRECISION_INT, MV_PRECISION_INTERNAL );
  cu.mv[REF_PIC_LIST_0][0] = cMv; // store in fractional pel accuracy

  cu.mvpIdx[REF_PIC_LIST_0] = bvpIdxBest;

  if (cu.imv == IMV_4PEL && cMv != amvpInfo4Pel.mvCand[bvpIdxBest])
    cu.mvd[REF_PIC_LIST_0][0] = cMv - amvpInfo4Pel.mvCand[bvpIdxBest];
  else
    cu.mvd[REF_PIC_LIST_0][0] = cMv - amvpInfo.mvCand[bvpIdxBest];

  if (cu.mvd[REF_PIC_LIST_0][0] == Mv(0, 0))
    cu.imv = IMV_OFF;
  if (cu.imv == IMV_4PEL)
    assert((cMv.hor % 16 == 0) && (cMv.ver % 16 == 0));
  if (cu.cs->sps->AMVR)
    assert(cu.imv > 0 || cu.mvd[REF_PIC_LIST_0][0] == Mv());

  cu.refIdx[REF_PIC_LIST_0] = MAX_NUM_REF;

  return true;
}


static inline bool isYPartBefore( SplitSeries series, const int ctuSizeLog2, const Position& refPos, const Position& pos )
{
#ifndef NDEBUG
  const int refCtuX = refPos.x >> ctuSizeLog2;
  const int refCtuY = refPos.y >> ctuSizeLog2;
  const int posCtuX = pos.x >> ctuSizeLog2;
  const int posCtuY = pos.y >> ctuSizeLog2;

  CHECK( refCtuX != posCtuX || refCtuY != posCtuY, "This method can only be applied for positions within the same CTU" );

#endif
  const int ctuMask = ( 1 << ctuSizeLog2 ) - 1;

  const int refX = refPos.x & ctuMask;
  const int refY = refPos.y & ctuMask;
  const int posX = pos.x & ctuMask;
  const int posY = pos.y & ctuMask;

  int x = 0, y = 0, w = 1 << ctuSizeLog2, h = 1 << ctuSizeLog2;
  
  while( true )
  {
    PartSplit split = PartSplit( series & SPLIT_MASK );

    switch( split )
    {
    case CU_QUAD_SPLIT:
      w >>= 1;
      if( posX >= x + w ) x += w;
    case CU_HORZ_SPLIT:
      h >>= 1;
      if( posY >= y + h ) y += h;
      break;

    case CU_VERT_SPLIT:
      w >>= 1;
      if( posX >= x + w ) x += w;
      goto checkXonly;

    case CU_TRIH_SPLIT:
      h >>= 2;
      if( posY >= y + h ) { y += h; h <<= 1; }
      if( posY >= y + h ) { y += h; h >>= 1; }
      break;

    case CU_TRIV_SPLIT:
      w >>= 2;
      if( posX >= x + w ) { x += w; w <<= 1; }
      if( posX >= x + w ) { x += w; w >>= 1; }
      goto checkXonly;

    default:
      return false;
    }

    if( refY >= y + h ) return true;
    else if( refY < y ) return false;

checkXonly:
    if( refX >= x + w ) return true;
    else if( refX < x ) return false;

    series >>= SPLIT_DMULT; continue;
  }

  return false;
}

bool InterSearch::searchBvIBC(const CodingUnit& cu, int xPos, int yPos, int width, int height, int picWidth, int picHeight, int xBv, int yBv, int ctuSize) const
{
  const int ctuSizeLog2 = Log2(ctuSize);

  int refRightX  = xPos + xBv + width  - 1;
  int refBottomY = yPos + yBv + height - 1;

  int refLeftX = xPos + xBv;
  int refTopY  = yPos + yBv;

  if ((xPos + xBv) < 0)
  {
    return false;
  }
  if (refRightX >= picWidth)
  {
    return false;
  }

  if ((yPos + yBv) < 0)
  {
    return false;
  }
  if (refBottomY >= picHeight)
  {
    return false;
  }
  if ((xBv + width) > 0 && (yBv + height) > 0)
  {
    return false;
  }

  // Don't search the above CTU row
  if (refTopY >> ctuSizeLog2 < yPos >> ctuSizeLog2)
    return false;

  // Don't search the below CTU row
  if (refBottomY >> ctuSizeLog2 > yPos >> ctuSizeLog2)
  {
    return false;
  }

  unsigned curTileIdx = cu.cs->pps->getTileIdx(cu.lumaPos());
  unsigned refTileIdx = cu.cs->pps->getTileIdx(Position(refLeftX, refTopY));
  if (curTileIdx != refTileIdx)
  {
    return false;
  }
  refTileIdx = cu.cs->pps->getTileIdx(Position(refLeftX, refBottomY));
  if (curTileIdx != refTileIdx)
  {
    return false;
  }
  refTileIdx = cu.cs->pps->getTileIdx(Position(refRightX, refTopY));
  if (curTileIdx != refTileIdx)
  {
    return false;
  }
  refTileIdx = cu.cs->pps->getTileIdx(Position(refRightX, refBottomY));
  if (curTileIdx != refTileIdx)
  {
    return false;
  }

  const Position cuPos{ xPos, yPos };

  //int numLeftCTUs = (1 << ((7 - ctuSizeLog2) << 1)) - ((ctuSizeLog2 < 7) ? 1 : 0);
  static const int numLeftCTUsLUT[3] = { 15, 3, 1 };

  // in the same CTU line
  const int numLeftCTUs = numLeftCTUsLUT[ctuSizeLog2 - 5];

  if( ( refRightX >> ctuSizeLog2 <= xPos >> ctuSizeLog2 ) && ( refLeftX >> ctuSizeLog2 >= ( xPos >> ctuSizeLog2 ) - numLeftCTUs ) )
  {
    // in the same CTU, or left CTU
    // if part of ref block is in the left CTU, some area can be referred from the not-yet updated local CTU buffer
    if( ( ctuSizeLog2 == 7 ) && ( ( refLeftX >> ctuSizeLog2 ) == ( ( xPos >> ctuSizeLog2 ) - 1 ) ) )
    {
      // ref block's collocated block in current CTU
      const Position refPosCol64x64{ ( refLeftX + ctuSize ) & ~63, refTopY & ~63 };
      if( refPosCol64x64 == Position{ xPos & ~63, yPos & ~63 } )
        return false;

      //CodingUnit* curef = cu.cs->getCU(refPosCol64x64, CH_L, cu.treeType);
      //bool isDecomp = curef && ((cu.cs != curef->cs) || cu.idx < curef->idx);
      bool isDecomp = isYPartBefore( cu.splitSeries, ctuSizeLog2, cuPos, refPosCol64x64 );
      if( isDecomp )
      {
        return false;
      }
    }
  }
  else
    return false;

  // in the same CTU, or valid area from left CTU. Check if the reference block is already coded
  const Position refPosBR{ refRightX, refBottomY };
  //CodingUnit* curef = cu.cs->getCU(refPosBR, CH_L, cu.treeType);
  //bool isDecomp = curef && ((cu.cs != curef->cs) || cu.idx < curef->idx);
  bool isDecomp = ( ( refPosBR.x >> ctuSizeLog2 ) < ( cuPos.x >> ctuSizeLog2 ) ) || ( refRightX < xPos && refBottomY < yPos ) || isYPartBefore( cu.splitSeries, ctuSizeLog2, cuPos, refPosBR );

  return isDecomp;
}

} // namespace vvenc

//! \}


Coverage Report

Created: 2026-10-28 06:18