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/* The copyright in this software is being made available under the BSD
 * License, included below. This software may be subject to other third party
 * and contributor rights, including patent rights, and no such rights are
 * granted under this license.
 *
 * Copyright (c) 2010-2018, ITU/ISO/IEC
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  * Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *  * Neither the name of the ITU/ISO/IEC nor the names of its contributors may
 *    be used to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

/** \file     UnitTool.cpp
 *  \brief    defines operations for basic units
 */

#include "UnitTools.h"

#include "dtrace_next.h"

#include "Unit.h"
#include "Slice.h"
#include "Picture.h"

#include <utility>
#include <algorithm>

// CS tools


uint64_t CS::getEstBits(const CodingStructure &cs)
{
  return cs.fracBits >> SCALE_BITS;
}



bool CS::isDualITree( const CodingStructure &cs )
{
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  return cs.slice->isIRAP() && !cs.pcv->ISingleTree;
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}

UnitArea CS::getArea( const CodingStructure &cs, const UnitArea &area, const ChannelType chType )
{
  return isDualITree( cs ) ? area.singleChan( chType ) : area;
}

// CU tools

bool CU::isIntra(const CodingUnit &cu)
{
  return cu.predMode == MODE_INTRA;
}

bool CU::isInter(const CodingUnit &cu)
{
  return cu.predMode == MODE_INTER;
}

bool CU::isRDPCMEnabled(const CodingUnit& cu)
{
  return cu.cs->sps->getSpsRangeExtension().getRdpcmEnabledFlag(cu.predMode == MODE_INTRA ? RDPCM_SIGNAL_IMPLICIT : RDPCM_SIGNAL_EXPLICIT);
}

bool CU::isLosslessCoded(const CodingUnit &cu)
{
  return cu.cs->pps->getTransquantBypassEnabledFlag() && cu.transQuantBypass;
}

bool CU::isSameSlice(const CodingUnit& cu, const CodingUnit& cu2)
{
  return cu.slice->getIndependentSliceIdx() == cu2.slice->getIndependentSliceIdx();
}

#if HEVC_TILES_WPP
bool CU::isSameTile(const CodingUnit& cu, const CodingUnit& cu2)
{
  return cu.tileIdx == cu2.tileIdx;
}

bool CU::isSameSliceAndTile(const CodingUnit& cu, const CodingUnit& cu2)
{
  return ( cu.slice->getIndependentSliceIdx() == cu2.slice->getIndependentSliceIdx() ) && ( cu.tileIdx == cu2.tileIdx );
}
#endif

bool CU::isSameCtu(const CodingUnit& cu, const CodingUnit& cu2)
{
  uint32_t ctuSizeBit = g_aucLog2[cu.cs->sps->getMaxCUWidth()];

  Position pos1Ctu(cu.lumaPos().x  >> ctuSizeBit, cu.lumaPos().y  >> ctuSizeBit);
  Position pos2Ctu(cu2.lumaPos().x >> ctuSizeBit, cu2.lumaPos().y >> ctuSizeBit);

  return pos1Ctu.x == pos2Ctu.x && pos1Ctu.y == pos2Ctu.y;
}

uint32_t CU::getIntraSizeIdx(const CodingUnit &cu)
{
  uint8_t uiWidth = cu.lumaSize().width;

  uint32_t  uiCnt   = 0;

  while (uiWidth)
  {
    uiCnt++;
    uiWidth >>= 1;
  }

  uiCnt -= 2;

  return uiCnt > 6 ? 6 : uiCnt;
}

bool CU::isLastSubCUOfCtu( const CodingUnit &cu )
{
  const SPS &sps      = *cu.cs->sps;
  const Area cuAreaY = CS::isDualITree( *cu.cs ) ? Area( recalcPosition( cu.chromaFormat, cu.chType, CHANNEL_TYPE_LUMA, cu.blocks[cu.chType].pos() ), recalcSize( cu.chromaFormat, cu.chType, CHANNEL_TYPE_LUMA, cu.blocks[cu.chType].size() ) ) : ( const Area& ) cu.Y();

  return ( ( ( ( cuAreaY.x + cuAreaY.width  ) & cu.cs->pcv->maxCUWidthMask  ) == 0 || cuAreaY.x + cuAreaY.width  == sps.getPicWidthInLumaSamples()  ) &&
           ( ( ( cuAreaY.y + cuAreaY.height ) & cu.cs->pcv->maxCUHeightMask ) == 0 || cuAreaY.y + cuAreaY.height == sps.getPicHeightInLumaSamples() ) );
}

uint32_t CU::getCtuAddr( const CodingUnit &cu )
{
  return getCtuAddr( cu.blocks[cu.chType].lumaPos(), *cu.cs->pcv );
}

int CU::predictQP( const CodingUnit& cu, const int prevQP )
{
  const CodingStructure &cs = *cu.cs;

#if ENABLE_WPP_PARALLELISM
  if( cs.sps->getSpsNext().getUseNextDQP() )
  {
    // Inter-CTU 2D "planar"   c(orner)  a(bove)
    // predictor arrangement:  b(efore)  p(rediction)

    // restrict the lookup, as it might cross CTU/slice/tile boundaries
    const CodingUnit *cuA = cs.getCURestricted( cu.blocks[cu.chType].pos().offset(  0, -1 ), cu, cu.chType );
    const CodingUnit *cuB = cs.getCURestricted( cu.blocks[cu.chType].pos().offset( -1,  0 ), cu, cu.chType );
    const CodingUnit *cuC = cs.getCURestricted( cu.blocks[cu.chType].pos().offset( -1, -1 ), cu, cu.chType );

    const int a = cuA ? cuA->qp : cs.slice->getSliceQpBase();
    const int b = cuB ? cuB->qp : cs.slice->getSliceQpBase();
    const int c = cuC ? cuC->qp : cs.slice->getSliceQpBase();

    return Clip3( ( a < b ? a : b ), ( a > b ? a : b ), a + b - c ); // derived from Martucci's Median Adaptive Prediction, 1990
  }

#endif
  // only predict within the same CTU, use HEVC's above+left prediction
  const int a = ( cu.blocks[cu.chType].y & ( cs.pcv->maxCUHeightMask >> getChannelTypeScaleY( cu.chType, cu.chromaFormat ) ) ) ? ( cs.getCU( cu.blocks[cu.chType].pos().offset( 0, -1 ), cu.chType ) )->qp : prevQP;
  const int b = ( cu.blocks[cu.chType].x & ( cs.pcv->maxCUWidthMask  >> getChannelTypeScaleX( cu.chType, cu.chromaFormat ) ) ) ? ( cs.getCU( cu.blocks[cu.chType].pos().offset( -1, 0 ), cu.chType ) )->qp : prevQP;

  return ( a + b + 1 ) >> 1;
}

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#if JVET_L0362_QG_FIX
bool CU::isQGStart( const CodingUnit& cu, Partitioner& partitioner )
#else
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bool CU::isQGStart( const CodingUnit& cu )
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#endif
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{
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#if JVET_L0362_QG_FIX
  int maxDqpDepth = cu.slice->getPPS()->getMaxCuDQPDepth();
  if( partitioner.currDepth >= maxDqpDepth )
  {
    PartLevel splitAtMaxDepth = partitioner.getPartStack().at( maxDqpDepth ); 
    // the parent node of qtDepth + mttDepth == maxDqpDepth
    if( splitAtMaxDepth.parts[splitAtMaxDepth.idx].blocks[partitioner.chType].pos() == cu.blocks[partitioner.chType].pos() )
      return true;
    else
      return false;
  }
  else
    return true;
#else
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  const SPS &sps = *cu.cs->sps;
  const PPS &pps = *cu.cs->pps;

  return ( cu.blocks[cu.chType].x % ( ( 1 << ( g_aucLog2[sps.getMaxCUWidth()]  - pps.getMaxCuDQPDepth() ) ) >> getChannelTypeScaleX( cu.chType, cu.chromaFormat ) ) ) == 0 &&
         ( cu.blocks[cu.chType].y % ( ( 1 << ( g_aucLog2[sps.getMaxCUHeight()] - pps.getMaxCuDQPDepth() ) ) >> getChannelTypeScaleY( cu.chType, cu.chromaFormat ) ) ) == 0;
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#endif
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}

uint32_t CU::getNumPUs( const CodingUnit& cu )
{
  uint32_t cnt = 0;
  PredictionUnit *pu = cu.firstPU;

  do
  {
    cnt++;
  } while( ( pu != cu.lastPU ) && ( pu = pu->next ) );

  return cnt;
}

void CU::addPUs( CodingUnit& cu )
{
  cu.cs->addPU( CS::getArea( *cu.cs, cu, cu.chType ), cu.chType );
}


PartSplit CU::getSplitAtDepth( const CodingUnit& cu, const unsigned depth )
{
  if( depth >= cu.depth ) return CU_DONT_SPLIT;

  const PartSplit cuSplitType = PartSplit( ( cu.splitSeries >> ( depth * SPLIT_DMULT ) ) & SPLIT_MASK );

  if     ( cuSplitType == CU_QUAD_SPLIT    ) return CU_QUAD_SPLIT;

  else if( cuSplitType == CU_HORZ_SPLIT    ) return CU_HORZ_SPLIT;

  else if( cuSplitType == CU_VERT_SPLIT    ) return CU_VERT_SPLIT;

  else if( cuSplitType == CU_TRIH_SPLIT    ) return CU_TRIH_SPLIT;
  else if( cuSplitType == CU_TRIV_SPLIT    ) return CU_TRIV_SPLIT;
  else   { THROW( "Unknown split mode"    ); return CU_QUAD_SPLIT; }
}

bool CU::hasNonTsCodedBlock( const CodingUnit& cu )
{
  bool hasAnyNonTSCoded = false;

  for( auto &currTU : traverseTUs( cu ) )
  {
    for( uint32_t i = 0; i < ::getNumberValidTBlocks( *cu.cs->pcv ); i++ )
    {
      hasAnyNonTSCoded |= ( currTU.blocks[i].valid() && !currTU.transformSkip[i] && TU::getCbf( currTU, ComponentID( i ) ) );
    }
  }

  return hasAnyNonTSCoded;
}

uint32_t CU::getNumNonZeroCoeffNonTs( const CodingUnit& cu )
{
  uint32_t count = 0;
  for( auto &currTU : traverseTUs( cu ) )
  {
    count += TU::getNumNonZeroCoeffsNonTS( currTU );
  }

  return count;
}




PUTraverser CU::traversePUs( CodingUnit& cu )
{
  return PUTraverser( cu.firstPU, cu.lastPU->next );
}

TUTraverser CU::traverseTUs( CodingUnit& cu )
{
  return TUTraverser( cu.firstTU, cu.lastTU->next );
}

cPUTraverser CU::traversePUs( const CodingUnit& cu )
{
  return cPUTraverser( cu.firstPU, cu.lastPU->next );
}

cTUTraverser CU::traverseTUs( const CodingUnit& cu )
{
  return cTUTraverser( cu.firstTU, cu.lastTU->next );
}

// PU tools

int PU::getIntraMPMs( const PredictionUnit &pu, unsigned* mpm, const ChannelType &channelType /*= CHANNEL_TYPE_LUMA*/ )
{
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  const int numMPMs = NUM_MOST_PROBABLE_MODES;
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  const int extendRefLine = (channelType == CHANNEL_TYPE_LUMA) ? pu.multiRefIdx : 0;
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  {
    int numCand      = -1;
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    int leftIntraDir = PLANAR_IDX, aboveIntraDir = PLANAR_IDX;

    const CompArea &area = pu.block(getFirstComponentOfChannel(channelType));
    const Position posRT = area.topRight();
    const Position posLB = area.bottomLeft();

    // Get intra direction of left PU
    const PredictionUnit *puLeft = pu.cs->getPURestricted(posLB.offset(-1, 0), pu, channelType);
    if (puLeft && CU::isIntra(*puLeft->cu))
    {
      leftIntraDir = puLeft->intraDir[channelType];
    }

    // Get intra direction of above PU
    const PredictionUnit *puAbove = pu.cs->getPURestricted(posRT.offset(0, -1), pu, channelType);
    if (puAbove && CU::isIntra(*puAbove->cu) && CU::isSameCtu(*pu.cu, *puAbove->cu))
    {
      aboveIntraDir = puAbove->intraDir[channelType];
    }

    CHECK(2 >= numMPMs, "Invalid number of most probable modes");

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    const int offset = (int)NUM_LUMA_MODE - 6;
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    const int mod = offset + 3;

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    if (extendRefLine)
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    {
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      int modeIdx = 0;
      int angularMode[2] = { 0, 0 };

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      if (leftIntraDir > DC_IDX)
      {
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        angularMode[modeIdx++] = leftIntraDir;
      }
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      if (aboveIntraDir > DC_IDX && aboveIntraDir != leftIntraDir)
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      {
        angularMode[modeIdx++] = aboveIntraDir;
      }
      if (modeIdx == 0)
      {
        mpm[0] = VER_IDX;
        mpm[1] = HOR_IDX;
        mpm[2] = 2;
        mpm[3] = DIA_IDX;
        mpm[4] = VDIA_IDX;
        mpm[5] = 26;
      }
      else if (modeIdx == 1)
      {
        mpm[0] = angularMode[0];
        mpm[1] = ((angularMode[0] + offset) % mod) + 2;
        mpm[2] = ((angularMode[0] - 1) % mod) + 2;
        mpm[3] = ((angularMode[0] + offset - 1) % mod) + 2;
        mpm[4] = (angularMode[0] % mod) + 2;
        mpm[5] = ((angularMode[0] + offset - 2) % mod) + 2;
      }
      else
      {
        mpm[0] = angularMode[0];
        mpm[1] = angularMode[1];
        int maxCandModeIdx = mpm[0] > mpm[1] ? 0 : 1;
        int minCandModeIdx = 1 - maxCandModeIdx;
        if (mpm[maxCandModeIdx] - mpm[minCandModeIdx] == 1)
        {
          mpm[2] = ((angularMode[minCandModeIdx] + offset) % mod) + 2;
          mpm[3] = ((angularMode[maxCandModeIdx] - 1) % mod) + 2;
          mpm[4] = ((angularMode[minCandModeIdx] + offset - 1) % mod) + 2;
          mpm[5] = ( angularMode[maxCandModeIdx] % mod) + 2;
        }
        else if (mpm[maxCandModeIdx] - mpm[minCandModeIdx] >= 62)
        {
          mpm[2] = ((angularMode[minCandModeIdx] - 1) % mod) + 2;
          mpm[3] = ((angularMode[maxCandModeIdx] + offset) % mod) + 2;
          mpm[4] = ((angularMode[minCandModeIdx]) % mod) + 2;
          mpm[5] = ((angularMode[maxCandModeIdx] + offset - 1) % mod) + 2;
        }
        else if (mpm[maxCandModeIdx] - mpm[minCandModeIdx] == 2)
        {
          mpm[2] = ((angularMode[minCandModeIdx] - 1) % mod) + 2;
          mpm[3] = ((angularMode[minCandModeIdx] + offset) % mod) + 2;
          mpm[4] = ((angularMode[maxCandModeIdx] - 1) % mod) + 2;
          mpm[5] = ((angularMode[minCandModeIdx] + offset - 1) % mod) + 2;
        }
        else
        {
          mpm[2] = ((angularMode[minCandModeIdx] + offset) % mod) + 2;
          mpm[3] = ((angularMode[minCandModeIdx] - 1) % mod) + 2;
          mpm[4] = ((angularMode[maxCandModeIdx] + offset) % mod) + 2;
          mpm[5] = ((angularMode[maxCandModeIdx] - 1) % mod) + 2;
        }
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      }
    }
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    else
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    {
      mpm[0] = leftIntraDir;
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      mpm[1] = (mpm[0] == PLANAR_IDX) ? DC_IDX : PLANAR_IDX;
      mpm[2] = VER_IDX;
      mpm[3] = HOR_IDX;
      mpm[4] = VER_IDX - 4;
      mpm[5] = VER_IDX + 4;
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      if (leftIntraDir == aboveIntraDir)
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      {
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        numCand = 1;
        if (leftIntraDir > DC_IDX)
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        {
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          mpm[0] = leftIntraDir;
          mpm[1] = PLANAR_IDX;
          mpm[2] = DC_IDX;
          mpm[3] = ((leftIntraDir + offset) % mod) + 2;
          mpm[4] = ((leftIntraDir - 1) % mod) + 2;
          mpm[5] = ((leftIntraDir + offset - 1) % mod) + 2;
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        }
      }
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      else //L!=A
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      {
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        numCand = 2;
        mpm[0] = leftIntraDir;
        mpm[1] = aboveIntraDir;
        bool maxCandModeIdx = mpm[0] > mpm[1] ? 0 : 1;

        if ((leftIntraDir > DC_IDX) && (aboveIntraDir > DC_IDX))
        {
          mpm[2] = PLANAR_IDX;
          mpm[3] = DC_IDX;
          if ((mpm[maxCandModeIdx] - mpm[!maxCandModeIdx] < 63) && (mpm[maxCandModeIdx] - mpm[!maxCandModeIdx] > 1))
          {
            mpm[4] = ((mpm[maxCandModeIdx] + offset) % mod) + 2;
            mpm[5] = ((mpm[maxCandModeIdx] - 1) % mod) + 2;
          }
          else
          {
            mpm[4] = ((mpm[maxCandModeIdx] + offset - 1) % mod) + 2;
            mpm[5] = ((mpm[maxCandModeIdx]) % mod) + 2;
          }
        }
        else if (leftIntraDir + aboveIntraDir >= 2)
        {
          mpm[2] = (mpm[!maxCandModeIdx] == PLANAR_IDX) ? DC_IDX : PLANAR_IDX;
          mpm[3] = ((mpm[maxCandModeIdx] + offset) % mod) + 2;
          mpm[4] = ((mpm[maxCandModeIdx] - 1) % mod) + 2;
          mpm[5] = ((mpm[maxCandModeIdx] + offset - 1) % mod) + 2;
        }
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      }
    }
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    for (int i = 0; i < numMPMs; i++)
    {
      CHECK(mpm[i] >= NUM_LUMA_MODE, "Invalid MPM");
    }
    CHECK(numCand == 0, "No candidates found");
    return numCand;
  }
}


void PU::getIntraChromaCandModes( const PredictionUnit &pu, unsigned modeList[NUM_CHROMA_MODE] )
{
  {
    modeList[  0 ] = PLANAR_IDX;
    modeList[  1 ] = VER_IDX;
    modeList[  2 ] = HOR_IDX;
    modeList[  3 ] = DC_IDX;
    modeList[4] = LM_CHROMA_IDX;
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    modeList[5] = MDLM_L_IDX;
    modeList[6] = MDLM_T_IDX;
    modeList[7] = DM_CHROMA_IDX;
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    Position topLeftPos = pu.blocks[pu.chType].lumaPos();
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    Position refPos = topLeftPos.offset( pu.blocks[pu.chType].lumaSize().width >> 1, pu.blocks[pu.chType].lumaSize().height >> 1 );
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    const PredictionUnit *lumaPU = CS::isDualITree( *pu.cs ) ? pu.cs->picture->cs->getPU( refPos, CHANNEL_TYPE_LUMA ) : &pu;
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    const uint32_t lumaMode = lumaPU->intraDir[CHANNEL_TYPE_LUMA];
    for( int i = 0; i < 4; i++ )
    {
      if( lumaMode == modeList[i] )
      {
        modeList[i] = VDIA_IDX;
        break;
      }
    }
  }
}


bool PU::isLMCMode(unsigned mode)
{
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  return (mode >= LM_CHROMA_IDX && mode <= MDLM_T_IDX);
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}
bool PU::isLMCModeEnabled(const PredictionUnit &pu, unsigned mode)
{
  if ( pu.cs->sps->getSpsNext().getUseLMChroma() )
  {
    return true;
  }
  return false;
}

int PU::getLMSymbolList(const PredictionUnit &pu, int *pModeList)
{
  int iIdx = 0;

  pModeList[ iIdx++ ] = LM_CHROMA_IDX;
    pModeList[ iIdx++ ] = -1;
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  pModeList[iIdx++] = MDLM_L_IDX;
  pModeList[iIdx++] = MDLM_T_IDX;
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  return iIdx;
}



bool PU::isChromaIntraModeCrossCheckMode( const PredictionUnit &pu )
{
  return pu.intraDir[CHANNEL_TYPE_CHROMA] == DM_CHROMA_IDX;
}

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int PU::getMHIntraMPMs(const PredictionUnit &pu, unsigned* mpm, const ChannelType &channelType /*= CHANNEL_TYPE_LUMA*/, const bool isChromaMDMS /*= false*/, const unsigned startIdx /*= 0*/)
{
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  const int numMPMs = 3; // Multi-hypothesis intra uses only 3 MPM
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  {
    int numCand = -1;
    uint32_t leftIntraDir = DC_IDX, aboveIntraDir = DC_IDX;

    const CompArea& area = pu.block(getFirstComponentOfChannel(channelType));
    const Position& pos = area.pos();

    // Get intra direction of left PU
    const PredictionUnit *puLeft = pu.cs->getPURestricted(pos.offset(-1, 0), pu, channelType);

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    if (puLeft && (CU::isIntra(*puLeft->cu) || puLeft->mhIntraFlag))
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    {
      leftIntraDir = puLeft->intraDir[channelType];

      if (isChroma(channelType) && leftIntraDir == DM_CHROMA_IDX)
      {
        leftIntraDir = puLeft->intraDir[0];
      }
    }

    // Get intra direction of above PU
    const PredictionUnit* puAbove = pu.cs->getPURestricted(pos.offset(0, -1), pu, channelType);

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    if (puAbove && (CU::isIntra(*puAbove->cu) || puAbove->mhIntraFlag) && CU::isSameCtu(*pu.cu, *puAbove->cu))
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    {
      aboveIntraDir = puAbove->intraDir[channelType];

      if (isChroma(channelType) && aboveIntraDir == DM_CHROMA_IDX)
      {
        aboveIntraDir = puAbove->intraDir[0];
      }
    }

    CHECK(2 >= numMPMs, "Invalid number of most probable modes");

    uint32_t leftIntraDir2 = leftIntraDir;
    uint32_t aboveIntraDir2 = aboveIntraDir;

    leftIntraDir2 = (leftIntraDir2 > DC_IDX) ? ((leftIntraDir2 <= DIA_IDX) ? HOR_IDX : VER_IDX) : leftIntraDir2;
    aboveIntraDir2 = (aboveIntraDir2 > DC_IDX) ? ((aboveIntraDir2 <= DIA_IDX) ? HOR_IDX : VER_IDX) : aboveIntraDir2;

    if (leftIntraDir2 == aboveIntraDir2)
    {
      numCand = 1;

      if (leftIntraDir2 > DC_IDX) // angular modes
      {
        mpm[0] = leftIntraDir2;
        mpm[1] = PLANAR_IDX;
        mpm[2] = DC_IDX;
      }
      else //non-angular
      {
        mpm[0] = PLANAR_IDX;
        mpm[1] = DC_IDX;
        mpm[2] = VER_IDX;
      }
    }
    else
    {
      numCand = 2;

      mpm[0] = leftIntraDir2;
      mpm[1] = aboveIntraDir2;

      if (leftIntraDir2 && aboveIntraDir2) //both modes are non-planar
      {
        mpm[2] = PLANAR_IDX;
      }
      else
      {
        mpm[2] = (leftIntraDir2 + aboveIntraDir2) < 2 ? VER_IDX : DC_IDX;
      }
    }
    int narrowCase = getNarrowShape(pu.lwidth(), pu.lheight());
    if (narrowCase > 0)
    {
      bool isMPM[NUM_LUMA_MODE];
      for (int idx = 0; idx < NUM_LUMA_MODE; idx++)
      {
        isMPM[idx] = false;
      }
      for (int idx = 0; idx < numMPMs; idx++)
      {
        isMPM[mpm[idx]] = true;
      }
      if (narrowCase == 1 && isMPM[HOR_IDX])
      {
        for (int idx = 0; idx < numMPMs; idx++)
        {
          if (mpm[idx] == HOR_IDX)
          {
            if (!isMPM[PLANAR_IDX])
              mpm[idx] = PLANAR_IDX;
            else if (!isMPM[DC_IDX])
              mpm[idx] = DC_IDX;
            else if (!isMPM[VER_IDX])
              mpm[idx] = VER_IDX;
            break;
          }
        }
      }
      if (narrowCase == 2 && isMPM[VER_IDX])
      {
        for (int idx = 0; idx < numMPMs; idx++)
        {
          if (mpm[idx] == VER_IDX)
          {
            if (!isMPM[PLANAR_IDX])
              mpm[idx] = PLANAR_IDX;
            else if (!isMPM[DC_IDX])
              mpm[idx] = DC_IDX;
            else if (!isMPM[HOR_IDX])
              mpm[idx] = HOR_IDX;
            break;
          }
        }
      }
    }
    CHECK(numCand == 0, "No candidates found");
    CHECK(mpm[0] == mpm[1] || mpm[0] == mpm[2] || mpm[2] == mpm[1], "redundant MPM");
    return numCand;
  }
}
int PU::getNarrowShape(const int width, const int height)
{
  int longSide = (width > height) ? width : height;
  int shortSide = (width > height) ? height : width;
  if (longSide > (2 * shortSide))
  {
    if (longSide == width)
      return 1;
    else
      return 2;
  }
  else
  {
    return 0;
  }
}

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uint32_t PU::getFinalIntraMode( const PredictionUnit &pu, const ChannelType &chType )
{
  uint32_t uiIntraMode = pu.intraDir[chType];

  if( uiIntraMode == DM_CHROMA_IDX && !isLuma( chType ) )
  {
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    Position topLeftPos = pu.blocks[pu.chType].lumaPos();
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    Position refPos = topLeftPos.offset( pu.blocks[pu.chType].lumaSize().width >> 1, pu.blocks[pu.chType].lumaSize().height >> 1 );
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    const PredictionUnit &lumaPU = CS::isDualITree( *pu.cs ) ? *pu.cs->picture->cs->getPU( refPos, CHANNEL_TYPE_LUMA ) : *pu.cs->getPU( topLeftPos, CHANNEL_TYPE_LUMA );
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    uiIntraMode = lumaPU.intraDir[0];
  }
  if( pu.chromaFormat == CHROMA_422 && !isLuma( chType ) )
  {
    uiIntraMode = g_chroma422IntraAngleMappingTable[uiIntraMode];
  }
  return uiIntraMode;
}

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bool PU::xCheckSimilarMotion(const int mergeCandIndex, const int prevCnt, const MergeCtx mergeCandList, bool hasPruned[MRG_MAX_NUM_CANDS])
{
  for (uint32_t ui = 0; ui < prevCnt; ui++)
  {
    if (hasPruned[ui])
    {
      continue;
    }
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    if (mergeCandList.interDirNeighbours[ui] == mergeCandList.interDirNeighbours[mergeCandIndex])
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    {
      if (mergeCandList.interDirNeighbours[ui] == 3)
      {
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        int offset0 = (ui * 2);
        int offset1 = (mergeCandIndex * 2);
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        if (mergeCandList.mvFieldNeighbours[offset0].refIdx == mergeCandList.mvFieldNeighbours[offset1].refIdx &&
            mergeCandList.mvFieldNeighbours[offset0 + 1].refIdx == mergeCandList.mvFieldNeighbours[offset1 + 1].refIdx &&
            mergeCandList.mvFieldNeighbours[offset0].mv == mergeCandList.mvFieldNeighbours[offset1].mv &&
            mergeCandList.mvFieldNeighbours[offset0 + 1].mv == mergeCandList.mvFieldNeighbours[offset1 + 1].mv
          )
        {
          hasPruned[ui] = true;
          return true;
        }
      }
      else
      {
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        int offset0 = (ui * 2) + mergeCandList.interDirNeighbours[ui] - 1;
        int offset1 = (mergeCandIndex * 2) + mergeCandList.interDirNeighbours[ui] - 1;
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        if (mergeCandList.mvFieldNeighbours[offset0].refIdx == mergeCandList.mvFieldNeighbours[offset1].refIdx &&
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            mergeCandList.mvFieldNeighbours[offset0].mv == mergeCandList.mvFieldNeighbours[offset1].mv
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          )
        {
          hasPruned[ui] = true;
          return true;
        }
      }
    }
  }
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  return false;
}
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#if JVET_L0090_PAIR_AVG
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bool PU::addMergeHMVPCand(const Slice &slice, MergeCtx& mrgCtx, bool canFastExit, const int& mrgCandIdx, const uint32_t maxNumMergeCandMin1, int &cnt, const int prevCnt, bool isAvailableSubPu, unsigned subPuMvpPos
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#if JVET_L0293_CPR
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  , int mmvdList
#endif
)
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#else
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bool PU::addMergeHMVPCand(const Slice &slice, MergeCtx& mrgCtx, bool isCandInter[MRG_MAX_NUM_CANDS], bool canFastExit, const int& mrgCandIdx, const uint32_t maxNumMergeCandMin1, int &cnt, const int prevCnt, bool isAvailableSubPu, unsigned subPuMvpPos
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#if JVET_L0293_CPR
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  , int mmvdList
#endif
)
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#endif
{
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#if JVET_L0293_CPR
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  int mrgCandIdxCPR = mrgCandIdx;
#endif
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  MotionInfo miNeighbor;
  bool hasPruned[MRG_MAX_NUM_CANDS];
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  memset(hasPruned, 0, MRG_MAX_NUM_CANDS * sizeof(bool));
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  if (isAvailableSubPu)
  {
    hasPruned[subPuMvpPos] = true;
  }
  int num_avai_candInLUT = slice.getAvailableLUTMrgNum();
  for (int mrgIdx = 1; mrgIdx <= num_avai_candInLUT; mrgIdx++)
  {
    miNeighbor = slice.getMotionInfoFromLUTs(num_avai_candInLUT - mrgIdx);
    mrgCtx.interDirNeighbours[cnt] = miNeighbor.interDir;
    mrgCtx.mvFieldNeighbours[cnt << 1].setMvField(miNeighbor.mv[0], miNeighbor.refIdx[0]);
    if (slice.isInterB())
    {
      mrgCtx.mvFieldNeighbours[(cnt << 1) + 1].setMvField(miNeighbor.mv[1], miNeighbor.refIdx[1]);
    }
    if (!xCheckSimilarMotion(cnt, prevCnt, mrgCtx, hasPruned))
    {
#if !JVET_L0090_PAIR_AVG
      isCandInter[cnt] = true;
#endif
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#if JVET_L0293_CPR
      if (miNeighbor.interDir == 1 && slice.getRefPic(REF_PIC_LIST_0, miNeighbor.refIdx[0])->getPOC() == slice.getPOC())
      {
        mrgCtx.mrgTypeNeighbours[cnt] = MRG_TYPE_CPR;
        if(mmvdList != 0 && mrgCandIdx != -1)
          mrgCandIdxCPR++;
      }
      if (mrgCandIdxCPR == cnt && canFastExit)
#else
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      if (mrgCandIdx == cnt && canFastExit)
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#endif
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      {
        return true;
      }
      cnt ++;
      if (cnt  == maxNumMergeCandMin1)
      {
        break;
      }
    }
  }
  return false;
}
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void PU::getInterMergeCandidates( const PredictionUnit &pu, MergeCtx& mrgCtx,
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                                 int mmvdList,
                                 const int& mrgCandIdx )
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{
  const CodingStructure &cs  = *pu.cs;
  const Slice &slice         = *pu.cs->slice;
  const uint32_t maxNumMergeCand = slice.getMaxNumMergeCand();
  const bool canFastExit     = pu.cs->pps->getLog2ParallelMergeLevelMinus2() == 0;

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#if !JVET_L0090_PAIR_AVG
  // this variable is unused if remove HEVC combined candidates
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  bool isCandInter[MRG_MAX_NUM_CANDS];
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#endif
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  for (uint32_t ui = 0; ui < maxNumMergeCand; ++ui)
  {
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    isCandInter[ui] = false;
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#endif
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    mrgCtx.GBiIdx[ui] = GBI_DEFAULT;
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    mrgCtx.interDirNeighbours[ui] = 0;
    mrgCtx.mrgTypeNeighbours [ui] = MRG_TYPE_DEFAULT_N;
    mrgCtx.mvFieldNeighbours[(ui << 1)    ].refIdx = NOT_VALID;
    mrgCtx.mvFieldNeighbours[(ui << 1) + 1].refIdx = NOT_VALID;
  }

  mrgCtx.numValidMergeCand = maxNumMergeCand;
  // compute the location of the current PU

  int cnt = 0;
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#if JVET_L0293_CPR
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  int mrgCandIdxCPR = mrgCandIdx;
#endif

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  const Position posLT = pu.Y().topLeft();
  const Position posRT = pu.Y().topRight();
  const Position posLB = pu.Y().bottomLeft();

  MotionInfo miAbove, miLeft, miAboveLeft, miAboveRight, miBelowLeft;

  //left
  const PredictionUnit* puLeft = cs.getPURestricted( posLB.offset( -1, 0 ), pu, pu.chType );

  const bool isAvailableA1 = puLeft && isDiffMER( pu, *puLeft ) && pu.cu != puLeft->cu && CU::isInter( *puLeft->cu );

  if( isAvailableA1 )
  {
    miLeft = puLeft->getMotionInfo( posLB.offset(-1, 0) );

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    isCandInter[cnt] = true;
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#endif
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    // get Inter Dir
    mrgCtx.interDirNeighbours[cnt] = miLeft.interDir;
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    mrgCtx.GBiIdx[cnt] = (mrgCtx.interDirNeighbours[cnt] == 3) ? puLeft->cu->GBiIdx : GBI_DEFAULT;
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    // get Mv from Left
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#if JVET_L0293_CPR
    if (puLeft->cu->cpr)
    {
      mrgCtx.mrgTypeNeighbours[cnt] = MRG_TYPE_CPR;
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#if JVET_L0293_CPR
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      if (mmvdList != 0 && mrgCandIdx != -1)
        mrgCandIdxCPR++;
#endif
    }
#endif
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    mrgCtx.mvFieldNeighbours[cnt << 1].setMvField(miLeft.mv[0], miLeft.refIdx[0]);

    if (slice.isInterB())
    {
      mrgCtx.mvFieldNeighbours[(cnt << 1) + 1].setMvField(miLeft.mv[1], miLeft.refIdx[1]);
    }
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#if JVET_L0293_CPR
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    if (mrgCandIdxCPR == cnt && canFastExit)
#else
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    if( mrgCandIdx == cnt && canFastExit )
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#endif
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    {
      return;
    }

    cnt++;
  }

  // early termination
  if (cnt == maxNumMergeCand)
  {
    return;
  }


  // above
  const PredictionUnit *puAbove = cs.getPURestricted( posRT.offset( 0, -1 ), pu, pu.chType );

  bool isAvailableB1 = puAbove && isDiffMER( pu, *puAbove ) && pu.cu != puAbove->cu && CU::isInter( *puAbove->cu );

  if( isAvailableB1 )
  {
    miAbove = puAbove->getMotionInfo( posRT.offset( 0, -1 ) );

    if( !isAvailableA1 || ( miAbove != miLeft ) )
    {
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      isCandInter[cnt] = true;
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#endif
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      // get Inter Dir
      mrgCtx.interDirNeighbours[cnt] = miAbove.interDir;
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      // get Mv from Above
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      mrgCtx.GBiIdx[cnt] = (mrgCtx.interDirNeighbours[cnt] == 3) ? puAbove->cu->GBiIdx : GBI_DEFAULT;
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#if JVET_L0293_CPR
      if (puAbove->cu->cpr)
      {
        mrgCtx.mrgTypeNeighbours[cnt] = MRG_TYPE_CPR;
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#if JVET_L0293_CPR
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        if (mmvdList != 0 && mrgCandIdx != -1)
          mrgCandIdxCPR++;
#endif
      }
#endif
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      mrgCtx.mvFieldNeighbours[cnt << 1].setMvField( miAbove.mv[0], miAbove.refIdx[0] );
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      if( slice.isInterB() )
      {
        mrgCtx.mvFieldNeighbours[( cnt << 1 ) + 1].setMvField( miAbove.mv[1], miAbove.refIdx[1] );
      }
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#if JVET_L0293_CPR
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      if (mrgCandIdxCPR == cnt && canFastExit)
#else
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      if( mrgCandIdx == cnt && canFastExit )
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#endif
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      {
        return;
      }

      cnt++;
    }
  }

  // early termination
  if( cnt == maxNumMergeCand )
  {
    return;
  }

  // above right
  const PredictionUnit *puAboveRight = cs.getPURestricted( posRT.offset( 1, -1 ), pu, pu.chType );

  bool isAvailableB0 = puAboveRight && isDiffMER( pu, *puAboveRight ) && CU::isInter( *puAboveRight->cu );

  if( isAvailableB0 )
  {
    miAboveRight = puAboveRight->getMotionInfo( posRT.offset( 1, -1 ) );

#if HM_JEM_MERGE_CANDS
    if( ( !isAvailableB1 || ( miAbove != miAboveRight ) ) && ( !isAvailableA1 || ( miLeft != miAboveRight ) ) )
#else
    if( !isAvailableB1 || ( miAbove != miAboveRight ) )
#endif
    {
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      isCandInter[cnt] = true;
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#endif
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      // get Inter Dir
      mrgCtx.interDirNeighbours[cnt] = miAboveRight.interDir;
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      // get Mv from Above-right
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      mrgCtx.GBiIdx[cnt] = (mrgCtx.interDirNeighbours[cnt] == 3) ? puAboveRight->cu->GBiIdx : GBI_DEFAULT;
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#if JVET_L0293_CPR
      if (puAboveRight->cu->cpr)
      {
        mrgCtx.mrgTypeNeighbours[cnt] = MRG_TYPE_CPR;
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#if JVET_L0293_CPR
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        if (mmvdList != 0 && mrgCandIdx != -1)
          mrgCandIdxCPR++;
#endif
      }
#endif
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      mrgCtx.mvFieldNeighbours[cnt << 1].setMvField( miAboveRight.mv[0], miAboveRight.refIdx[0] );
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      if( slice.isInterB() )
      {
        mrgCtx.mvFieldNeighbours[( cnt << 1 ) + 1].setMvField( miAboveRight.mv[1], miAboveRight.refIdx[1] );
      }

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#if JVET_L0293_CPR
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      if (mrgCandIdxCPR == cnt && canFastExit)
#else
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      if( mrgCandIdx == cnt && canFastExit )
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#endif
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      {
        return;
      }

      cnt++;
    }
  }
  // early termination
  if( cnt == maxNumMergeCand )
  {
    return;
  }

  //left bottom
  const PredictionUnit *puLeftBottom = cs.getPURestricted( posLB.offset( -1, 1 ), pu, pu.chType );

  bool isAvailableA0 = puLeftBottom && isDiffMER( pu, *puLeftBottom ) && CU::isInter( *puLeftBottom->cu );

  if( isAvailableA0 )
  {
    miBelowLeft = puLeftBottom->getMotionInfo( posLB.offset( -1, 1 ) );

#if HM_JEM_MERGE_CANDS
    if( ( !isAvailableA1 || ( miBelowLeft != miLeft ) ) && ( !isAvailableB1 || ( miBelowLeft != miAbove ) ) && ( !isAvailableB0 || ( miBelowLeft != miAboveRight ) ) )
#else
    if( !isAvailableA1 || ( miBelowLeft != miLeft ) )
#endif
    {
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      isCandInter[cnt] = true;
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#endif
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      // get Inter Dir
      mrgCtx.interDirNeighbours[cnt] = miBelowLeft.interDir;
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      mrgCtx.GBiIdx[cnt] = (mrgCtx.interDirNeighbours[cnt] == 3) ? puLeftBottom->cu->GBiIdx : GBI_DEFAULT;
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      // get Mv from Bottom-Left
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#if JVET_L0293_CPR
      if (puLeftBottom->cu->cpr)
      {
        mrgCtx.mrgTypeNeighbours[cnt] = MRG_TYPE_CPR;
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#if JVET_L0293_CPR
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        if (mmvdList != 0 && mrgCandIdx != -1)
          mrgCandIdxCPR++;
#endif
      }
#endif
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      mrgCtx.mvFieldNeighbours[cnt << 1].setMvField( miBelowLeft.mv[0], miBelowLeft.refIdx[0] );

      if( slice.isInterB() )
      {
        mrgCtx.mvFieldNeighbours[( cnt << 1 ) + 1].setMvField( miBelowLeft.mv[1], miBelowLeft.refIdx[1] );
      }

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#if JVET_L0293_CPR
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      if (mrgCandIdxCPR == cnt && canFastExit)
#else
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      if( mrgCandIdx == cnt && canFastExit )
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#endif
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      {
        return;
      }

      cnt++;
    }
  }
  // early termination
  if( cnt == maxNumMergeCand )
  {
    return;
  }


  // above left
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  if ( cnt < 4 )
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  {
    const PredictionUnit *puAboveLeft = cs.getPURestricted( posLT.offset( -1, -1 ), pu, pu.chType );

    bool isAvailableB2 = puAboveLeft && isDiffMER( pu, *puAboveLeft ) && CU::isInter( *puAboveLeft->cu );

    if( isAvailableB2 )
    {
      miAboveLeft = puAboveLeft->getMotionInfo( posLT.offset( -1, -1 ) );

#if HM_JEM_MERGE_CANDS
      if( ( !isAvailableA1 || ( miLeft != miAboveLeft ) ) && ( !isAvailableB1 || ( miAbove != miAboveLeft ) ) && ( !isAvailableA0 || ( miBelowLeft != miAboveLeft ) ) && ( !isAvailableB0 || ( miAboveRight != miAboveLeft ) ) )
#else
      if( ( !isAvailableA1 || ( miLeft != miAboveLeft ) ) && ( !isAvailableB1 || ( miAbove != miAboveLeft ) ) )
#endif
      {
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        isCandInter[cnt] = true;
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#endif
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        // get Inter Dir
        mrgCtx.interDirNeighbours[cnt] = miAboveLeft.interDir;
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        mrgCtx.GBiIdx[cnt] = (mrgCtx.interDirNeighbours[cnt] == 3) ? puAboveLeft->cu->GBiIdx : GBI_DEFAULT;
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        // get Mv from Above-Left
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#if JVET_L0293_CPR
        if (puAboveLeft->cu->cpr)
        {
          mrgCtx.mrgTypeNeighbours[cnt] = MRG_TYPE_CPR;
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#if JVET_L0293_CPR
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          if (mmvdList != 0 && mrgCandIdx != -1)
            mrgCandIdxCPR++;
#endif
        }
#endif
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        mrgCtx.mvFieldNeighbours[cnt << 1].setMvField( miAboveLeft.mv[0], miAboveLeft.refIdx[0] );

        if( slice.isInterB() )
        {
          mrgCtx.mvFieldNeighbours[( cnt << 1 ) + 1].setMvField( miAboveLeft.mv[1], miAboveLeft.refIdx[1] );
        }

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#if JVET_L0293_CPR
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        if (mrgCandIdxCPR == cnt && canFastExit)
#else
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        if( mrgCandIdx == cnt && canFastExit )
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#endif
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        {
          return;
        }

        cnt++;
      }
    }
  }
  // early termination
  if (cnt == maxNumMergeCand)
  {
    return;
  }

  if (slice.getEnableTMVPFlag())
  {
    //>> MTK colocated-RightBottom
    // offset the pos to be sure to "point" to the same position the uiAbsPartIdx would've pointed to
    Position posRB = pu.Y().bottomRight().offset(-3, -3);

    const PreCalcValues& pcv = *cs.pcv;

    Position posC0;
    Position posC1 = pu.Y().center();
    bool C0Avail = false;

    if (((posRB.x + pcv.minCUWidth) < pcv.lumaWidth) && ((posRB.y + pcv.minCUHeight) < pcv.lumaHeight))
    {
      {
        Position posInCtu( posRB.x & pcv.maxCUWidthMask, posRB.y & pcv.maxCUHeightMask );

        if( ( posInCtu.x + 4 < pcv.maxCUWidth ) &&           // is not at the last column of CTU
            ( posInCtu.y + 4 < pcv.maxCUHeight ) )           // is not at the last row    of CTU
        {
          posC0 = posRB.offset( 4, 4 );
          C0Avail = true;
        }
        else if( posInCtu.x + 4 < pcv.maxCUWidth )           // is not at the last column of CTU But is last row of CTU
        {
          posC0 = posRB.offset( 4, 4 );
          // in the reference the CTU address is not set - thus probably resulting in no using this C0 possibility
        }
        else if( posInCtu.y + 4 < pcv.maxCUHeight )          // is not at the last row of CTU But is last column of CTU
        {
          posC0 = posRB.offset( 4, 4 );
          C0Avail = true;
        }
        else //is the right bottom corner of CTU
        {
          posC0 = posRB.offset( 4, 4 );
          // same as for last column but not last row
        }
      }
    }

    Mv        cColMv;
    int       iRefIdx     = 0;
    int       dir         = 0;
    unsigned  uiArrayAddr = cnt;
    bool      bExistMV    = ( C0Avail && getColocatedMVP(pu, REF_PIC_LIST_0, posC0, cColMv, iRefIdx ) )
                                      || getColocatedMVP(pu, REF_PIC_LIST_0, posC1, cColMv, iRefIdx );

    if (bExistMV)
    {
      dir     |= 1;
      mrgCtx.mvFieldNeighbours[2 * uiArrayAddr].setMvField(cColMv, iRefIdx);
    }

    if (slice.isInterB())
    {
      bExistMV = ( C0Avail && getColocatedMVP(pu, REF_PIC_LIST_1, posC0, cColMv, iRefIdx ) )
                           || getColocatedMVP(pu, REF_PIC_LIST_1, posC1, cColMv, iRefIdx );
      if (bExistMV)
      {
        dir     |= 2;
        mrgCtx.mvFieldNeighbours[2 * uiArrayAddr + 1].setMvField(cColMv, iRefIdx);
      }
    }

    if( dir != 0 )
    {
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      bool addTMvp = true;
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#if HM_JEM_MERGE_CANDS
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      int iSpanCand = cnt;
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      for( int i = 0; i < iSpanCand; i++ )
      {
        if( mrgCtx.interDirNeighbours[  i           ] == dir &&
            mrgCtx.mvFieldNeighbours [  i << 1      ] == mrgCtx.mvFieldNeighbours[  uiArrayAddr << 1      ] &&
            mrgCtx.mvFieldNeighbours [( i << 1 ) + 1] == mrgCtx.mvFieldNeighbours[( uiArrayAddr << 1 ) + 1] )
        {
          addTMvp = false;
        }
      }
#endif
      if( addTMvp )
      {
        mrgCtx.interDirNeighbours[uiArrayAddr] = dir;
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#if !JVET_L0090_PAIR_AVG
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        isCandInter              [uiArrayAddr] = true;
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#endif
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        mrgCtx.GBiIdx[uiArrayAddr] = GBI_DEFAULT;
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#if JVET_L0293_CPR
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        if (mrgCandIdxCPR == cnt && canFastExit)
#else
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        if( mrgCandIdx == cnt && canFastExit )
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#endif
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        {
          return;
        }

        cnt++;
      }
    }
  }

  // early termination
  if (cnt == maxNumMergeCand)
  {
    return;
  }
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  int maxNumMergeCandMin1 = maxNumMergeCand - 1;
  if (cnt != maxNumMergeCandMin1)
  {
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    bool isAvailableSubPu = false;
    unsigned subPuMvpPos = 0;
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#if JVET_L0090_PAIR_AVG
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    bool bFound = addMergeHMVPCand(slice, mrgCtx, canFastExit
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#if JVET_L0293_CPR
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      , (mmvdList != 0 && mrgCandIdx != -1) ? (const int) mrgCandIdxCPR : mrgCandIdx
#else
      , mrgCandIdx
#endif
      , maxNumMergeCandMin1, cnt, cnt, isAvailableSubPu, subPuMvpPos
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#if JVET_L0293_CPR
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      , mmvdList
#endif
    );
#else
    bool bFound = addMergeHMVPCand(slice, mrgCtx, isCandInter, canFastExit
#if JVET_L0293_CPR
      , (mmvdList != 0 && mrgCandIdx != -1) ? (const int)mrgCandIdxCPR : mrgCandIdx
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#else
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      , mrgCandIdx
#endif
      , maxNumMergeCandMin1, cnt, cnt, isAvailableSubPu, subPuMvpPos
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#if JVET_L0293_CPR
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      , mmvdList
#endif
    );
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#endif
    if (bFound)
    {
      return;
    }
  }
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#if JVET_L0090_PAIR_AVG
  // pairwise-average candidates
  {
    const int cutoff = std::min( cnt, 4 );
    const int end = cutoff * (cutoff - 1) / 2;
    constexpr int PRIORITY_LIST0[] = { 0, 0, 1, 0, 1, 2 };
    constexpr int PRIORITY_LIST1[] = { 1, 2, 2, 3, 3, 3 };

    for( int idx = 0; idx < end && cnt != maxNumMergeCand; idx++ )
    {
      const int i = PRIORITY_LIST0[idx];
      const int j = PRIORITY_LIST1[idx];

      mrgCtx.mvFieldNeighbours[cnt * 2].setMvField( Mv( 0, 0 ), NOT_VALID );
      mrgCtx.mvFieldNeighbours[cnt * 2 + 1].setMvField( Mv( 0, 0 ), NOT_VALID );
      // calculate average MV for L0 and L1 seperately
      unsigned char interDir = 0;
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#if JVET_L0293_CPR


      // skip when one is BV and one is MV
      if (mrgCtx.mrgTypeNeighbours[i] != mrgCtx.mrgTypeNeighbours[j] && pu.cs->sps->getSpsNext().getCPRMode())
      {
        continue;
      }
#endif
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      for( int refListId = 0; refListId < (slice.isInterB() ? 2 : 1); refListId++ )
      {
        const short refIdxI = mrgCtx.mvFieldNeighbours[i * 2 + refListId].refIdx;
        const short refIdxJ = mrgCtx.mvFieldNeighbours[j * 2 + refListId].refIdx;

        // both MVs are invalid, skip
        if( (refIdxI == NOT_VALID) && (refIdxJ == NOT_VALID) )
        {
          continue;
        }

        interDir += 1 << refListId;
        // both MVs are valid, average these two MVs
        if( (refIdxI != NOT_VALID) && (refIdxJ != NOT_VALID) )
        {
          const Mv& MvI = mrgCtx.mvFieldNeighbours[i * 2 + refListId].mv;
          const Mv& MvJ = mrgCtx.mvFieldNeighbours[j * 2 + refListId].mv;

          // average two MVs
          Mv avgMv = MvI;
          avgMv += MvJ;
          avgMv.setHor( avgMv.getHor() / 2 );
          avgMv.setVer( avgMv.getVer() / 2 );
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#if JVET_L0293_CPR



          if (mrgCtx.mrgTypeNeighbours[i] == MRG_TYPE_CPR && mrgCtx.mrgTypeNeighbours[j] == MRG_TYPE_CPR && pu.cs->sps->getSpsNext().getCPRMode())
          {
             mrgCtx.mrgTypeNeighbours[cnt] = MRG_TYPE_CPR;
             avgMv.setHor((avgMv.getHor() / 16) << 4);
             avgMv.setVer((avgMv.getVer() / 16) << 4);
          }
#endif
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          mrgCtx.mvFieldNeighbours[cnt * 2 + refListId].setMvField( avgMv, refIdxI );
        }
        // only one MV is valid, take the only one MV
        else if( refIdxI != NOT_VALID )
        {
          Mv singleMv = mrgCtx.mvFieldNeighbours[i * 2 + refListId].mv;
          mrgCtx.mvFieldNeighbours[cnt * 2 + refListId].setMvField( singleMv, refIdxI );
        }
        else if( refIdxJ != NOT_VALID )
        {
          Mv singleMv = mrgCtx.mvFieldNeighbours[j * 2 + refListId].mv;
          mrgCtx.mvFieldNeighbours[cnt * 2 + refListId].setMvField( singleMv, refIdxJ );
        }
      }

      mrgCtx.interDirNeighbours[cnt] = interDir;
      if( interDir > 0 )
      {
        cnt++;
      }
    }

    // early termination
    if( cnt == maxNumMergeCand )
    {
      return;
    }
  }
#endif

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  uint32_t uiArrayAddr = cnt;
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#if !JVET_L0090_PAIR_AVG
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  uint32_t uiCutoff    = std::min( uiArrayAddr, 3u );
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  if (slice.isInterB())
  {
    static const uint32_t NUM_PRIORITY_LIST = 12;
    static const uint32_t uiPriorityList0[NUM_PRIORITY_LIST] = { 0 , 1, 0, 2, 1, 2, 0, 3, 1, 3, 2, 3 };
    static const uint32_t uiPriorityList1[NUM_PRIORITY_LIST] = { 1 , 0, 2, 0, 2, 1, 3, 0, 3, 1, 3, 2 };

    for (int idx = 0; idx < uiCutoff * (uiCutoff - 1) && uiArrayAddr != maxNumMergeCand; idx++)
    {
      CHECK( idx >= NUM_PRIORITY_LIST, "Invalid priority list number" );
      int i = uiPriorityList0[idx];
      int j = uiPriorityList1[idx];
      if (isCandInter[i] && isCandInter[j] && (mrgCtx.interDirNeighbours[i] & 0x1) && (mrgCtx.interDirNeighbours[j] & 0x2))
      {
        isCandInter[uiArrayAddr] = true;
        mrgCtx.interDirNeighbours[uiArrayAddr] = 3;
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        mrgCtx.GBiIdx[uiArrayAddr] = ((mrgCtx.interDirNeighbours[uiArrayAddr] == 3)) ? CU::deriveGbiIdx(mrgCtx.GBiIdx[i], mrgCtx.GBiIdx[j]) : GBI_DEFAULT;
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        // get Mv from cand[i] and cand[j]
        mrgCtx.mvFieldNeighbours[ uiArrayAddr << 1     ].setMvField(mrgCtx.mvFieldNeighbours[ i << 1     ].mv, mrgCtx.mvFieldNeighbours[ i << 1     ].refIdx);
        mrgCtx.mvFieldNeighbours[(uiArrayAddr << 1) + 1].setMvField(mrgCtx.mvFieldNeighbours[(j << 1) + 1].mv, mrgCtx.mvFieldNeighbours[(j << 1) + 1].refIdx);

        int iRefPOCL0 = slice.getRefPOC(REF_PIC_LIST_0, mrgCtx.mvFieldNeighbours[(uiArrayAddr << 1)    ].refIdx);
        int iRefPOCL1 = slice.getRefPOC(REF_PIC_LIST_1, mrgCtx.mvFieldNeighbours[(uiArrayAddr << 1) + 1].refIdx);

        if( iRefPOCL0 == iRefPOCL1 && mrgCtx.mvFieldNeighbours[( uiArrayAddr << 1 )].mv == mrgCtx.mvFieldNeighbours[( uiArrayAddr << 1 ) + 1].mv )
        {
          isCandInter[uiArrayAddr] = false;
        }
        else
        {
          uiArrayAddr++;
        }
      }
    }
  }

  // early termination
  if (uiArrayAddr == maxNumMergeCand)
  {
    return;
  }
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#endif
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  int iNumRefIdx = slice.isInterB() ? std::min(slice.getNumRefIdx(REF_PIC_LIST_0), slice.getNumRefIdx(REF_PIC_LIST_1)) : slice.getNumRefIdx(REF_PIC_LIST_0);

  int r = 0;
  int refcnt = 0;
  while (uiArrayAddr < maxNumMergeCand)
  {
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    isCandInter               [uiArrayAddr     ] = true;
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#endif
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    mrgCtx.interDirNeighbours [uiArrayAddr     ] = 1;
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    mrgCtx.GBiIdx             [uiArrayAddr     ] = GBI_DEFAULT;
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    mrgCtx.mvFieldNeighbours  [uiArrayAddr << 1].setMvField(Mv(0, 0), r);

    if (slice.isInterB())
    {
      mrgCtx.interDirNeighbours [ uiArrayAddr          ] = 3;
      mrgCtx.mvFieldNeighbours  [(uiArrayAddr << 1) + 1].setMvField(Mv(0, 0), r);
    }

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#if JVET_L0293_CPR
    if ( mrgCtx.interDirNeighbours[uiArrayAddr] == 1 && pu.cs->slice->getRefPic(REF_PIC_LIST_0, mrgCtx.mvFieldNeighbours[uiArrayAddr << 1].refIdx)->getPOC() == pu.cs->slice->getPOC())
    {
      mrgCtx.mrgTypeNeighbours[uiArrayAddr] = MRG_TYPE_CPR;
    }
#endif

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    uiArrayAddr++;

    if (refcnt == iNumRefIdx - 1)
    {
      r = 0;
    }
    else
    {
      ++r;
      ++refcnt;
    }
  }
  mrgCtx.numValidMergeCand = uiArrayAddr;
}
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#if JVET_L0293_CPR
// for cpr pu validation
bool PU::isBlockVectorValid(PredictionUnit& pu, int xPos, int yPos, int width, int height, int picWidth, int picHeight, int xStartInCU, int yStartInCU, int xBv, int yBv, int ctuSize)
{
  const int ctuSizeLog2 = g_aucLog2[ctuSize];

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

  // cannot be in the above CTU row
  if (refTopY >> ctuSizeLog2 < yPos >> ctuSizeLog2)
    return false;

  // cannot be in the below CTU row
  if (refBottomY >> ctuSizeLog2 > yPos >> ctuSizeLog2)
  {
    return false;
  }

  // in the same CTU line

  if ((refRightX >> ctuSizeLog2 <= xPos >> ctuSizeLog2) && (refLeftX >> ctuSizeLog2 >= (xPos >> ctuSizeLog2)))
  {
    // in the same CTU, check if the reference block is already coded
    const Position refPosLT = pu.Y().topLeft().offset(xBv, yBv);
    const Position refPosBR = pu.Y().bottomRight().offset(xBv, yBv);
    const ChannelType      chType = toChannelType(COMPONENT_Y);
    {
      if (!pu.cs->isDecomp(refPosBR, chType))
        return false;
      if (!pu.cs->isDecomp(refPosLT, chType))
        return false;
    }
    return true;
  }
  else
    return false;

}// for cpr pu validation
#endif
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static int xGetDistScaleFactor(const int &iCurrPOC, const int &iCurrRefPOC, const int &iColPOC, const int &iColRefPOC)
{
  int iDiffPocD = iColPOC - iColRefPOC;
  int iDiffPocB = iCurrPOC - iCurrRefPOC;

  if (iDiffPocD == iDiffPocB)
  {
    return 4096;
  }
  else
  {
    int iTDB = Clip3(-128, 127, iDiffPocB);
    int iTDD = Clip3(-128, 127, iDiffPocD);
    int iX = (0x4000 + abs(iTDD / 2)) / iTDD;
    int iScale = Clip3(-4096, 4095, (iTDB * iX + 32) >> 6);
    return iScale;
  }
}
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int PU::getDistScaleFactor(const int &currPOC, const int &currRefPOC, const int &colPOC, const int &colRefPOC)
{
  return xGetDistScaleFactor(currPOC, currRefPOC, colPOC, colRefPOC);
}

void PU::getInterMMVDMergeCandidates(const PredictionUnit &pu, MergeCtx& mrgCtx, const int& mrgCandIdx)
{
  int refIdxList0, refIdxList1;
  int k;
  int currBaseNum = 0;
  const uint16_t maxNumMergeCand = mrgCtx.numValidMergeCand;

  for (k = 0; k < maxNumMergeCand; k++)
  {
    if (mrgCtx.mrgTypeNeighbours[k] == MRG_TYPE_DEFAULT_N)
    {
      refIdxList0 = mrgCtx.mvFieldNeighbours[(k << 1)].refIdx;
      refIdxList1 = mrgCtx.mvFieldNeighbours[(k << 1) + 1].refIdx;

      if ((refIdxList0 >= 0) && (refIdxList1 >= 0))
      {
        mrgCtx.mmvdBaseMv[currBaseNum][0] = mrgCtx.mvFieldNeighbours[(k << 1)];
        mrgCtx.mmvdBaseMv[currBaseNum][1] = mrgCtx.mvFieldNeighbours[(k << 1) + 1];
      }
      else if (refIdxList0 >= 0)
      {
        mrgCtx.mmvdBaseMv[currBaseNum][0] = mrgCtx.mvFieldNeighbours[(k << 1)];
        mrgCtx.mmvdBaseMv[currBaseNum][1] = MvField(Mv(0, 0), -1);
      }
      else if (refIdxList1 >= 0)
      {
        mrgCtx.mmvdBaseMv[currBaseNum][0] = MvField(Mv(0, 0), -1);
        mrgCtx.mmvdBaseMv[currBaseNum][1] = mrgCtx.mvFieldNeighbours[(k << 1) + 1];
      }
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      currBaseNum++;

      if (currBaseNum == MMVD_BASE_MV_NUM)
        break;
    }
  }

  if (currBaseNum < MMVD_BASE_MV_NUM)
  {
    for (k = currBaseNum; k < MMVD_BASE_MV_NUM; k++)
    {
      mrgCtx.mmvdBaseMv[k][0] = MvField(Mv(0, 0), 0);
      mrgCtx.mmvdBaseMv[k][0] = MvField(Mv(0, 0), 0);
    }
  }
}
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bool PU::getColocatedMVP(const PredictionUnit &pu, const RefPicList &eRefPicList, const Position &_pos, Mv& rcMv, const int &refIdx )
{
  // don't perform MV compression when generally disabled or subPuMvp is used
  const unsigned scale = ( pu.cs->pcv->noMotComp ? 1 : 4 * std::max<int>(1, 4 * AMVP_DECIMATION_FACTOR / 4) );
  const unsigned mask  = ~( scale - 1 );

  const Position pos = Position{ PosType( _pos.x & mask ), PosType( _pos.y & mask ) };

  const Slice &slice = *pu.cs->slice;

  // use coldir.
  const Picture* const pColPic = slice.getRefPic(RefPicList(slice.isInterB() ? 1 - slice.getColFromL0Flag() : 0), slice.getColRefIdx());

  if( !pColPic )
  {
    return false;
  }

  RefPicList eColRefPicList = slice.getCheckLDC() ? eRefPicList : RefPicList(slice.getColFromL0Flag());

  const MotionInfo& mi = pColPic->cs->getMotionInfo( pos );

  if( !mi.isInter )
  {
    return false;
  }
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#if JVET_L0293_CPR
  if (eRefPicList == REF_PIC_LIST_0 && pu.cs->slice->getRefPic(eRefPicList, refIdx)->getPOC() == pu.cs->slice->getPOC())
  {
    return false;
  }
#endif
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  int iColRefIdx = mi.refIdx[eColRefPicList];

  if (iColRefIdx < 0)
  {
    eColRefPicList = RefPicList(1 - eColRefPicList);
    iColRefIdx = mi.refIdx[eColRefPicList];

    if (iColRefIdx < 0)
    {
      return false;
    }
  }

  const Slice *pColSlice = nullptr;

  for( const auto s : pColPic->slices )
  {
    if( s->getIndependentSliceIdx() == mi.sliceIdx )
    {
      pColSlice = s;
      break;
    }
  }

  CHECK( pColSlice == nullptr, "Slice segment not found" );

  const Slice &colSlice = *pColSlice;

  const bool bIsCurrRefLongTerm = slice.getRefPic(eRefPicList, refIdx)->longTerm;
  const bool bIsColRefLongTerm  = colSlice.getIsUsedAsLongTerm(eColRefPicList, iColRefIdx);

  if (bIsCurrRefLongTerm != bIsColRefLongTerm)
  {
    return false;
  }


  // Scale the vector.
  Mv cColMv = mi.mv[eColRefPicList];

  if (bIsCurrRefLongTerm /*|| bIsColRefLongTerm*/)
  {
    rcMv = cColMv;
  }
  else
  {
    const int currPOC    = slice.getPOC();
    const int colPOC     = colSlice.getPOC();
    const int colRefPOC  = colSlice.getRefPOC(eColRefPicList, iColRefIdx);
    const int currRefPOC = slice.getRefPic(eRefPicList, refIdx)->getPOC();
    const int distscale  = xGetDistScaleFactor(currPOC, currRefPOC, colPOC, colRefPOC);

    if (distscale == 4096)
    {
      rcMv = cColMv;
    }
    else
    {
      rcMv = cColMv.scaleMv(distscale);
    }
  }

  return true;
}

bool PU::isDiffMER(const PredictionUnit &pu1, const PredictionUnit &pu2)
{
  const unsigned xN = pu1.lumaPos().x;
  const unsigned yN = pu1.lumaPos().y;
  const unsigned xP = pu2.lumaPos().x;
  const unsigned yP = pu2.lumaPos().y;

  unsigned plevel = pu1.cs->pps->getLog2ParallelMergeLevelMinus2() + 2;

  if ((xN >> plevel) != (xP >> plevel))
  {
    return true;
  }

  if ((yN >> plevel) != (yP >> plevel))
  {
    return true;
  }

  return false;
}
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#if JVET_L0293_CPR
void PU::getCprMVPsEncOnly(PredictionUnit &pu, Mv* MvPred, int& nbPred)
{
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  //-- Get Spatial MV
  Position posLT = pu.Y().topLeft();
  Position posRT = pu.Y().topRight();
  Position posLB = pu.Y().bottomLeft();

  unsigned int left = 0, above = 0;

  //left
  const PredictionUnit *neibLeftPU = NULL;
  neibLeftPU = pu.cs->getPURestricted(posLB.offset(-1, 0), pu, pu.cs->chType);
  left = (neibLeftPU) ? neibLeftPU->cu->cpr : 0;

  if (left)
  {
    MvPred[nbPred++] = neibLeftPU->bv;
    if (getDerivedBV(pu, MvPred[nbPred - 1], MvPred[nbPred]))
      nbPred++;
  }

  //above
  const PredictionUnit *neibAbovePU = NULL;
  neibAbovePU = pu.cs->getPURestricted(posRT.offset(0, -1), pu, pu.cs->chType);
  above = (neibAbovePU) ? neibAbovePU->cu->cpr : 0;

  if (above)
  {
    MvPred[nbPred++] = neibAbovePU->bv;
    if (getDerivedBV(pu, MvPred[nbPred - 1], MvPred[nbPred]))
      nbPred++;
  }

  // Below Left predictor search
  const PredictionUnit *neibBelowLeftPU = NULL;
  neibBelowLeftPU = pu.cs->getPURestricted(posLB.offset(-1, 1), pu, pu.cs->chType);
  unsigned int belowLeft = (neibBelowLeftPU) ? neibBelowLeftPU->cu->cpr : 0;

  if (belowLeft)
  {
    MvPred[nbPred++] = neibBelowLeftPU->bv;
    if (getDerivedBV(pu, MvPred[nbPred - 1], MvPred[nbPred]))
      nbPred++;
  }


  // Above Right predictor search
  const PredictionUnit *neibAboveRightPU = NULL;
  neibAboveRightPU = pu.cs->getPURestricted(posRT.offset(1, -1), pu, pu.cs->chType);
  unsigned int aboveRight = (neibAboveRightPU) ? neibAboveRightPU->cu->cpr : 0;

  if (aboveRight)
  {
    MvPred[nbPred++] = neibAboveRightPU->bv;
    if (getDerivedBV(pu, MvPred[nbPred - 1], MvPred[nbPred]))
      nbPred++;
  }


  // Above Left predictor search
  const PredictionUnit *neibAboveLeftPU = NULL;
  neibAboveLeftPU = pu.cs->getPURestricted(posLT.offset(-1, -1), pu, pu.cs->chType);
  unsigned int aboveLeft = (neibAboveLeftPU) ? neibAboveLeftPU->cu->cpr : 0;

  if (aboveLeft)
  {
    MvPred[nbPred++] = neibAboveLeftPU->bv;
    if (getDerivedBV(pu, MvPred[nbPred - 1], MvPred[nbPred]))
      nbPred++;
  }
}

bool PU::getDerivedBV(PredictionUnit &pu, const Mv& currentMv, Mv& derivedMv)
{
  int   cuPelX = pu.lumaPos().x;
  int   cuPelY = pu.lumaPos().y;
  int rX = cuPelX + currentMv.getHor();
  int rY = cuPelY + currentMv.getVer();
  int offsetX = currentMv.getHor();
  int offsetY = currentMv.getVer();


  if (rX < 0 || rY < 0 || rX >= pu.cs->slice->getSPS()->getPicWidthInLumaSamples() || rY >= pu.cs->slice->getSPS()->getPicHeightInLumaSamples())
  {
    return false;
  }

  const PredictionUnit *neibRefPU = NULL;
  neibRefPU = pu.cs->getPURestricted(pu.lumaPos().offset(offsetX, offsetY), pu, pu.cs->chType);

  bool isCPR = (neibRefPU) ? neibRefPU->cu->cpr : 0;
  if (isCPR)
  {
    derivedMv = neibRefPU->bv;
    derivedMv += currentMv;
  }
  return isCPR;
}
#endif // CPR
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/** Constructs a list of candidates for AMVP (See specification, section "Derivation process for motion vector predictor candidates")
* \param uiPartIdx
* \param uiPartAddr
* \param eRefPicList
* \param iRefIdx
* \param pInfo
*/
void PU::fillMvpCand(PredictionUnit &pu, const RefPicList &eRefPicList, const int &refIdx, AMVPInfo &amvpInfo)
{
  CodingStructure &cs = *pu.cs;

  AMVPInfo *pInfo = &amvpInfo;

  pInfo->numCand = 0;

  if (refIdx < 0)
  {
    return;
  }

  //-- Get Spatial MV
  Position posLT = pu.Y().topLeft();
  Position posRT = pu.Y().topRight();
  Position posLB = pu.Y().bottomLeft();

  bool isScaledFlagLX = false; /// variable name from specification; true when the PUs below left or left are available (availableA0 || availableA1).

  {
    const PredictionUnit* tmpPU = cs.getPURestricted( posLB.offset( -1, 1 ), pu, pu.chType ); // getPUBelowLeft(idx, partIdxLB);
    isScaledFlagLX = tmpPU != NULL && CU::isInter( *tmpPU->cu );

    if( !isScaledFlagLX )
    {
      tmpPU = cs.getPURestricted( posLB.offset( -1, 0 ), pu, pu.chType );
      isScaledFlagLX = tmpPU != NULL && CU::isInter( *tmpPU->cu );
    }
  }

  // Left predictor search
  if( isScaledFlagLX )
  {
    bool bAdded = addMVPCandUnscaled( pu, eRefPicList, refIdx, posLB, MD_BELOW_LEFT, *pInfo );

    if( !bAdded )
    {
      bAdded = addMVPCandUnscaled( pu, eRefPicList, refIdx, posLB, MD_LEFT, *pInfo );

      if( !bAdded )
      {
        bAdded = addMVPCandWithScaling( pu, eRefPicList, refIdx, posLB, MD_BELOW_LEFT, *pInfo );

        if( !bAdded )
        {
          addMVPCandWithScaling( pu, eRefPicList, refIdx, posLB, MD_LEFT, *pInfo );
        }
      }
    }
  }

  // Above predictor search
  {
    bool bAdded = addMVPCandUnscaled( pu, eRefPicList, refIdx, posRT, MD_ABOVE_RIGHT, *pInfo );

    if( !bAdded )
    {
      bAdded = addMVPCandUnscaled( pu, eRefPicList, refIdx, posRT, MD_ABOVE, *pInfo );

      if( !bAdded )
      {
        addMVPCandUnscaled( pu, eRefPicList, refIdx, posLT, MD_ABOVE_LEFT, *pInfo );
      }
    }
  }

  if( !isScaledFlagLX )
  {
    bool bAdded = addMVPCandWithScaling( pu, eRefPicList, refIdx, posRT, MD_ABOVE_RIGHT, *pInfo );

    if( !bAdded )
    {
      bAdded = addMVPCandWithScaling( pu, eRefPicList, refIdx, posRT, MD_ABOVE, *pInfo );

      if( !bAdded )
      {
        addMVPCandWithScaling( pu, eRefPicList, refIdx, posLT, MD_ABOVE_LEFT, *pInfo );
      }
    }
  }

  if( pu.cu->imv != 0)
  {
    for( int i = 0; i < pInfo->numCand; i++ )
    {
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      pInfo->mvCand[i].roundToAmvrSignalPrecision(MV_PRECISION_INTERNAL, pu.cu->imv);
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    }
  }

  if( pInfo->numCand == 2 )
  {
    if( pInfo->mvCand[0] == pInfo->mvCand[1] )
    {
      pInfo->numCand = 1;
    }
  }

  if( cs.slice->getEnableTMVPFlag() )
  {
    // Get Temporal Motion Predictor
    const int refIdx_Col = refIdx;

    Position posRB = pu.Y().bottomRight().offset(-3, -3);

    const PreCalcValues& pcv = *cs.pcv;

    Position posC0;
    bool C0Avail = false;
    Position posC1 = pu.Y().center();

    Mv cColMv;

    if( ( ( posRB.x + pcv.minCUWidth ) < pcv.lumaWidth ) && ( ( posRB.y + pcv.minCUHeight ) < pcv.lumaHeight ) )
    {
      Position posInCtu( posRB.x & pcv.maxCUWidthMask, posRB.y & pcv.maxCUHeightMask );

      if ((posInCtu.x + 4 < pcv.maxCUWidth) &&           // is not at the last column of CTU
          (posInCtu.y + 4 < pcv.maxCUHeight))             // is not at the last row    of CTU
      {
        posC0 = posRB.offset(4, 4);
        C0Avail = true;
      }
      else if (posInCtu.x + 4 < pcv.maxCUWidth)           // is not at the last column of CTU But is last row of CTU
      {
        // in the reference the CTU address is not set - thus probably resulting in no using this C0 possibility
        posC0 = posRB.offset(4, 4);
      }
      else if (posInCtu.y + 4 < pcv.maxCUHeight)          // is not at the last row of CTU But is last column of CTU
      {
        posC0 = posRB.offset(4, 4);
        C0Avail = true;
      }
      else //is the right bottom corner of CTU
      {
        // same as for last column but not last row
        posC0 = posRB.offset(4, 4);
      }
    }

    if ((C0Avail && getColocatedMVP(pu, eRefPicList, posC0, cColMv, refIdx_Col)) || getColocatedMVP(pu, eRefPicList, posC1, cColMv, refIdx_Col))
    {
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      if (pu.cu->imv != 0)
      {
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        cColMv.roundToAmvrSignalPrecision(MV_PRECISION_INTERNAL, pu.cu->imv); 
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      }
      int i = 0;
      for (i = 0; i < pInfo->numCand; i++)
      {
        if (cColMv == pInfo->mvCand[i])
        {
          break;
        }
      }
      if (i == pInfo->numCand)
      {
        pInfo->mvCand[pInfo->numCand++] = cColMv;
      }
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    }
  }
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  if (pInfo->numCand < AMVP_MAX_NUM_CANDS)
  {
    const int        currRefPOC = cs.slice->getRefPic(eRefPicList, refIdx)->getPOC();
    const RefPicList eRefPicList2nd = (eRefPicList == REF_PIC_LIST_0) ? REF_PIC_LIST_1 : REF_PIC_LIST_0;
    addAMVPHMVPCand(pu, eRefPicList, eRefPicList2nd, currRefPOC, *pInfo, pu.cu->imv);
  }
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  if (pInfo->numCand > AMVP_MAX_NUM_CANDS)
  {
    pInfo->numCand = AMVP_MAX_NUM_CANDS;
  }

  while (pInfo->numCand < AMVP_MAX_NUM_CANDS)
  {
    pInfo->mvCand[pInfo->numCand] = Mv( 0, 0 );
    pInfo->numCand++;
  }
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  for (Mv &mv : pInfo->mvCand)
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  {
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    mv.changePrecision(MV_PRECISION_INTERNAL, MV_PRECISION_QUARTER);
    mv.roundToAmvrSignalPrecision(MV_PRECISION_QUARTER, pu.cu->imv);
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