/* -----------------------------------------------------------------------------

The copyright in this software is being made available under the Clear BSD

License, included below. No patent rights, trademark rights and/or 

other Intellectual Property Rights other than the copyrights concerning 

the Software are granted under this license.

The Clear BSD License

Copyright (c) 2019-2026, Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. & The VVenC Authors.

All rights reserved.

Redistribution and use in source and binary forms, with or without modification,

are permitted (subject to the limitations in the disclaimer below) 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 copyright holder nor the names of its

     contributors may be used to endorse or promote products derived from this

     software without specific prior written permission.

NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED BY

THIS LICENSE. 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     InterSearch.h

    \brief    inter search class (header)

 */

#pragma once

#include "CABACWriter.h"

#include "CommonLib/MotionInfo.h"

#include "CommonLib/InterPrediction.h"

#include "CommonLib/TrQuant.h"

#include "CommonLib/Unit.h"

#include "CommonLib/UnitPartitioner.h"

#include "CommonLib/RdCost.h"

#include "CommonLib/CommonDef.h"

#include "CommonLib/AffineGradientSearch.h"

#include <unordered_map>

#include <vector>

//! \ingroup EncoderLib

//! \{

namespace vvenc {

// ====================================================================================================================

// Class definition

// ====================================================================================================================

static const uint32_t MAX_NUM_REF_LIST_ADAPT_SR = 2;

static const uint32_t MAX_IDX_ADAPT_SR          = MAX_REF_PICS;

static const uint32_t NUM_MV_PREDICTORS         = 3;

struct ModeInfo

{

  uint32_t mergeCand;

  bool     isRegularMerge;

  bool     isMMVD;

  bool     isCIIP;

  bool     isBioOrDmvr;

  bool     isAffine;

  ModeInfo() {}

  ModeInfo(const uint32_t mergeCand, const bool isRegularMerge, const bool isMMVD, const bool isCIIP, const bool BioOrDmvr, const bool Affine) :

    mergeCand(mergeCand), isRegularMerge(isRegularMerge), isMMVD(isMMVD), isCIIP(isCIIP), isBioOrDmvr(BioOrDmvr), isAffine(Affine) {}

};

struct BlkUniMvInfo

{

  Mv uniMvs[2][MAX_REF_PICS];

  int x, y, w, h;

};

struct BlkRecord

{

  std::unordered_map<Mv, Distortion> bvRecord;

};

struct BlkUniMvInfoBuffer

{

  const BlkUniMvInfo* getBlkUniMvInfo(int i) const { return &m_uniMvList[(m_uniMvListIdx - 1 - i + m_uniMvListMaxSize) % (m_uniMvListMaxSize)]; }

        BlkUniMvInfo* getBlkUniMvInfo(int i)       { return &m_uniMvList[(m_uniMvListIdx - 1 - i + m_uniMvListMaxSize) % (m_uniMvListMaxSize)]; }

  void insertUniMvCands( const Area& blkArea, const Mv* cMvTemp)

  {

    BlkUniMvInfo* curMvInfo = m_uniMvList + m_uniMvListIdx;

    int j = 0;

    for (; j < m_uniMvListSize; j++)

    {

      BlkUniMvInfo* prevMvInfo = getBlkUniMvInfo( j );

      if ((blkArea.x == prevMvInfo->x) && (blkArea.y == prevMvInfo->y) && (blkArea.width == prevMvInfo->w) && (blkArea.height == prevMvInfo->h))

      {

        break;

      }

    }

//    DTRACE( g_trace_ctx, D_TMP, "%d unimv insert %d, %d [%d %d] \n", g_trace_ctx->getChannelCounter(D_TMP), blkArea.x, blkArea.y, blkArea.width, blkArea.height );

    if (j < m_uniMvListSize)

    {

      curMvInfo = getBlkUniMvInfo( j );

    }

    ::memcpy(curMvInfo->uniMvs, cMvTemp, 2 * MAX_REF_PICS * sizeof(Mv));

    if (j == m_uniMvListSize)  // new element

    {

      curMvInfo->x = blkArea.x;

      curMvInfo->y = blkArea.y;

      curMvInfo->w = blkArea.width;

      curMvInfo->h = blkArea.height;

      m_uniMvListSize = std::min(m_uniMvListSize + 1, m_uniMvListMaxSize);

      m_uniMvListIdx = (m_uniMvListIdx + 1) % (m_uniMvListMaxSize);

    }

  }

  void savePrevUniMvInfo(const CompArea& blkArea, BlkUniMvInfo &tmpUniMvInfo, bool& isUniMvInfoSaved)

  {

    int j = 0;

    const BlkUniMvInfo* curMvInfo = nullptr;

    for (; j < m_uniMvListSize; j++)

    {

      curMvInfo = getBlkUniMvInfo( j );

      if ((blkArea.x == curMvInfo->x) && (blkArea.y == curMvInfo->y) && (blkArea.width == curMvInfo->w) && (blkArea.height == curMvInfo->h))

      {

        break;

      }

    }

    if (j < m_uniMvListSize)

    {

//      DTRACE( g_trace_ctx, D_TMP, "%d unimv save %d, %d [%d %d] \n", g_trace_ctx->getChannelCounter(D_TMP), curMvInfo->x, curMvInfo->y, curMvInfo->w, curMvInfo->h );

      isUniMvInfoSaved = true;

      tmpUniMvInfo = *curMvInfo;

    }

  }

  void addUniMvInfo( const BlkUniMvInfo &tmpUniMVInfo)

  {

    int j = 0;

    BlkUniMvInfo* curMvInfo = nullptr;

    for (; j < m_uniMvListSize; j++)

    {

      curMvInfo = getBlkUniMvInfo( j );

      if ((tmpUniMVInfo.x == curMvInfo->x) && (tmpUniMVInfo.y == curMvInfo->y) && (tmpUniMVInfo.w == curMvInfo->w) && (tmpUniMVInfo.h == curMvInfo->h))

      {

        break;

      }

    }

//    DTRACE( g_trace_ctx, D_TMP, "%d unimv add %d, %d [%d %d] \n", g_trace_ctx->getChannelCounter(D_TMP), tmpUniMVInfo.x, tmpUniMVInfo.y, tmpUniMVInfo.w, tmpUniMVInfo.h );

    if (j < m_uniMvListSize)

    {

      *curMvInfo = tmpUniMVInfo;

    }

    else

    {

      m_uniMvList[m_uniMvListIdx] = tmpUniMVInfo;

      m_uniMvListIdx = (m_uniMvListIdx + 1) % m_uniMvListMaxSize;

      m_uniMvListSize = std::min(m_uniMvListSize + 1, m_uniMvListMaxSize);

    }

  }

  void resetUniMvList               () { m_uniMvListIdx = 0; m_uniMvListSize = 0; }

  BlkUniMvInfoBuffer()

  {

    m_uniMvListIdx = 0;

    m_uniMvListSize = 0;

  }

  ~BlkUniMvInfoBuffer()

  {

    m_uniMvListIdx = 0;

    m_uniMvListSize = 0;

  }

  static constexpr int m_uniMvListMaxSize = 15;

  BlkUniMvInfo         m_uniMvList[m_uniMvListMaxSize];

  int                  m_uniMvListIdx;

  int                  m_uniMvListSize;

};

class EncPicture;

class EncModeCtrl;

class EncReshape;

class EncCu;

struct AffineMVInfo

{

  Mv  affMVs[2][MAX_REF_PICS][3];

  int x, y, w, h;

};

typedef struct

{

  Mv acMvAffine4Para[2][3];

  Mv acMvAffine6Para[2][3];

  int16_t affine4ParaRefIdx[2];

  int16_t affine6ParaRefIdx[2];

  bool affine4ParaAvail;

  bool affine6ParaAvail;

} EncAffineMotion;

struct AffineProfList

{

  AffineProfList()

  {

    m_affMVListMaxSize = 0;

    m_affMVList = nullptr;

    m_affMVListIdx = 0;

    m_affMVListSize = 0;

  }

  void init( bool bLowDelay )

  {

    m_affMVListMaxSize = bLowDelay ? AFFINE_ME_LIST_SIZE_LD : AFFINE_ME_LIST_SIZE;

    if( !m_affMVList)

    {

      m_affMVList = new AffineMVInfo[m_affMVListMaxSize];

    }

    m_affMVListIdx = 0;

    m_affMVListSize = 0;

  }

  ~AffineProfList()

  {

    if( m_affMVList)

    {

      delete[] m_affMVList;

      m_affMVList = nullptr;

    }

    m_affMVListIdx = 0;

    m_affMVListSize = 0;

  }

  void resetAffineMVList() { m_affMVListIdx = 0; m_affMVListSize = 0; }

  bool savePrevAffMVInfo(int idx, AffineMVInfo &tmpMVInfo )

  {

    if( m_affMVListSize > idx)

    {

      tmpMVInfo = m_affMVList[(m_affMVListIdx - 1 - idx + m_affMVListMaxSize) % m_affMVListMaxSize];

      return true;

    }

    return false;

  }

  void addAffMVInfo(AffineMVInfo &tmpMVInfo)

  {

    int j = 0;

    AffineMVInfo *prevInfo = nullptr;

    for (; j < m_affMVListSize; j++)

    {

      prevInfo = m_affMVList + ((m_affMVListIdx - j - 1 + m_affMVListMaxSize) % (m_affMVListMaxSize));

      if ((tmpMVInfo.x == prevInfo->x) && (tmpMVInfo.y == prevInfo->y) && (tmpMVInfo.w == prevInfo->w) && (tmpMVInfo.h == prevInfo->h))

      {

        break;

      }

    }

    if (j < m_affMVListSize)

    {

      *prevInfo = tmpMVInfo;

    }

    else

    {

      m_affMVList[m_affMVListIdx] = tmpMVInfo;

      m_affMVListIdx = (m_affMVListIdx + 1) % m_affMVListMaxSize;

      m_affMVListSize = std::min(m_affMVListSize + 1, m_affMVListMaxSize);

    }

  }

  void insert( const AffineMVInfo& cMvTemp, const Area& area )

  {

    AffineMVInfo *affMVInfo = m_affMVList + m_affMVListIdx;

    //check;

    int j = 0;

    for (; j < m_affMVListSize; j++)

    {

      AffineMVInfo *prevMvInfo = m_affMVList + ((m_affMVListIdx - j - 1 + m_affMVListMaxSize) % (m_affMVListMaxSize));

      if ((area.x == prevMvInfo->x) && (area.y == prevMvInfo->y) && (area.width == prevMvInfo->w) && (area.height == prevMvInfo->h))

      {

        break;

      }

    }

    if (j < m_affMVListSize)

    {

      affMVInfo = m_affMVList + ((m_affMVListIdx - j - 1 + m_affMVListMaxSize) % (m_affMVListMaxSize));

    }

    ::memcpy(affMVInfo->affMVs, cMvTemp.affMVs, sizeof(cMvTemp.affMVs));

    if (j == m_affMVListSize)

    {

      affMVInfo->x = area.x;

      affMVInfo->y = area.y;

      affMVInfo->w = area.width;

      affMVInfo->h = area.height;

      m_affMVListSize = std::min(m_affMVListSize + 1, m_affMVListMaxSize);

      m_affMVListIdx = (m_affMVListIdx + 1) % (m_affMVListMaxSize);

    }

  }

  AffineMVInfo*   m_affMVList;

  int             m_affMVListIdx;

  int             m_affMVListSize;

  int             m_affMVListMaxSize;

};

struct ReuseUniMv

{

  Mv*             m_reusedUniMVs[6][6][32][32];

  ReuseUniMv();

  ~ReuseUniMv();

  void resetReusedUniMvs();

};

/// encoder search class

class InterSearch : public InterPrediction, AffineGradientSearch

{

private:

  EncModeCtrl*      m_modeCtrl;

  PelStorage        m_tmpPredStorage[NUM_REF_PIC_LIST_01];

  PelStorage        m_tmpStorageLCU;

  CodingStructure** m_pSaveCS;

  ClpRng            m_lumaClpRng;

  Mv                m_acBVs[2 * IBC_NUM_CANDIDATES];

  unsigned int      m_numBVs;

  IbcBvCand*        m_defaultCachedBvs;

  std::unordered_map< Position, std::unordered_map< Size, BlkRecord> > m_ctuRecord;

  CompStorage       m_orgResiCb[4], m_orgResiCr[4];   // 0:std, 1-3:jointCbCr

protected:

  // interface to option

  const VVEncCfg*   m_pcEncCfg;

  // interface to classes

  TrQuant*          m_pcTrQuant;

  EncReshape*       m_pcReshape;

  // ME parameters

  int               m_iSearchRange;

  int               m_bipredSearchRange; // Search range for bi-prediction

  vvencMESearchMethod m_motionEstimationSearchMethod;

  int               m_motionEstimationSearchMethodSCC;

  int               m_aaiAdaptSR[MAX_NUM_REF_LIST_ADAPT_SR][MAX_IDX_ADAPT_SR];

  // RD computation

  CABACWriter*      m_CABACEstimator;

  CtxCache*         m_CtxCache;

  DistParam         m_cDistParam;

  RdCost*           m_pcRdCost;

  Distortion        m_hevcCost;

  EncAffineMotion   m_affineMotion;

  PelStorage        m_tmpAffiStorage;

  Pel*              m_tmpAffiError;

  Pel*              m_tmpAffiDeri[2];

  MotionInfo        m_subPuMiBuf[(MAX_CU_SIZE * MAX_CU_SIZE) >> (MIN_CU_LOG2 << 1)];

  // Misc.

  Pel*              m_pTempPel;

  // AMVP cost computation

  uint32_t          m_auiMVPIdxCost[AMVP_MAX_NUM_CANDS+1][AMVP_MAX_NUM_CANDS+1];

  Distortion        m_estMinDistSbt[NUMBER_SBT_MODE + 1]; // estimated minimum SSE value of the PU if using a SBT mode

  uint8_t           m_sbtRdoOrder[NUMBER_SBT_MODE];       // order of SBT mode in RDO

  bool              m_skipSbtAll;                         // to skip all SBT modes for the current PU

  BcwMotionParam    m_uniMotions;

  uint8_t           m_estWeightIdxBits[BCW_NUM] = { 4, 3, 1, 2, 4 };

  bool              m_affineModeSelected;

public:

  ReuseUniMv*         m_ReuseUniMv;

  BlkUniMvInfoBuffer* m_BlkUniMvInfoBuffer;

  AffineProfList*     m_AffineProfList;

  bool                m_clipMvInSubPic;

public:

  InterSearch();

  virtual ~InterSearch();

  void init                         ( const VVEncCfg& encCfg, TrQuant* pTrQuant, RdCost* pRdCost, EncModeCtrl* pModeCtrl, CodingStructure **pSaveCS );

  void setCtuEncRsrc                ( CABACWriter* cabacEstimator, CtxCache* ctxCache, ReuseUniMv* pReuseUniMv, BlkUniMvInfoBuffer* pBlkUniMvInfoBuffer, AffineProfList* pAffineProfList, IbcBvCand* pCachedBvs );

  void destroy                      ();

  /// encoder estimation - inter prediction (non-skip)

  bool predInterSearch              ( CodingUnit& cu, Partitioner& partitioner, double& bestCostInter);

  /// set ME search range

  void encodeResAndCalcRdInterCU    ( CodingStructure &cs, Partitioner &partitioner, const bool skipResidual );

  void setSearchRange               ( const Slice* slice, const VVEncCfg& encCfg );

  void resetSavedAffineMotion       ();

  void storeAffineMotion            ( Mv acAffineMv[2][3], int16_t affineRefIdx[2], EAffineModel affineType, int BcwIdx);

  void loadGlobalUniMvs             ( const Area& lumaArea, const PreCalcValues& pcv);

  uint8_t    skipSbtByRDCost        ( int width, int height, int mtDepth, uint8_t sbtIdx, uint8_t sbtPos, double bestCost, Distortion distSbtOff, double costSbtOff, bool rootCbfSbtOff );

  bool       getSkipSbtAll          ()                            const { return m_skipSbtAll; }

  uint8_t    getSbtRdoOrder         ( uint8_t idx )               const { assert( m_sbtRdoOrder[idx] < NUMBER_SBT_MODE ); assert( (uint32_t)( m_estMinDistSbt[m_sbtRdoOrder[idx]] >> 2 ) < ( MAX_UINT >> 1 ) ); return m_sbtRdoOrder[idx]; }

  Distortion getEstDistSbt          ( uint8_t sbtMode)            const { return m_estMinDistSbt[sbtMode]; }

  void       initSbtRdoOrder        ( uint8_t sbtMode )                 { m_sbtRdoOrder[0] = sbtMode; m_estMinDistSbt[0] = m_estMinDistSbt[sbtMode]; }

  void       getBestSbt             ( CodingStructure* tempCS, CodingUnit* cu, uint8_t& histBestSbt, Distortion& curPuSse, uint8_t sbtAllowed, bool doPreAnalyzeResi, bool mtsAllowed );

  bool       predIBCSearch          (CodingUnit& cu, Partitioner& partitioner);

  bool       searchBvIBC            (const CodingUnit& pu, int xPos, int yPos, int width, int height, int picWidth, int picHeight, int xBv, int yBv, int ctuSize) const;

  void       resetCtuRecordIBC      () { m_ctuRecord.clear(); }

  void       resetBufferedUniMotions() { m_uniMotions.reset(); }

  uint8_t    getWeightIdxBits       ( uint8_t bcwIdx ) { return m_estWeightIdxBits[bcwIdx]; }

  void       setAffineModeSelected  ( bool flag ) { m_affineModeSelected = flag; }

private:

  void       xCalcMinDistSbt        ( CodingStructure &cs, const CodingUnit& cu, const uint8_t sbtAllowed );

  /// sub-function for motion vector refinement used in fractional-pel accuracy

  Distortion xPatternRefinement     ( const CPelBuf* pcPatternKey, Mv baseRefMv, int iFrac, Mv& rcMvFrac, Distortion& uiDistBest, int& patternId, CPelBuf* pattern, bool useAltHpelIf );

   typedef struct

   {

     int left;

     int right;

     int top;

     int bottom;

   } SearchRange;

  typedef struct

  {

    SearchRange     searchRange;

    const CPelBuf*  pcPatternKey;

    const Pel*      piRefY;

    int             iRefStride;

    int             iBestX;

    int             iBestY;

    uint32_t        uiBestRound;

    uint32_t        uiBestDistance;

    Distortion      uiBestSad;

    uint8_t         ucPointNr;

    int             subShiftMode;

    unsigned        imvShift;

    bool            useAltHpelIf;

    bool            zeroMV;

  } TZSearchStruct;

  // sub-functions for ME

  inline void xTZSearchHelp         ( TZSearchStruct& rcStruct, const int iSearchX, const int iSearchY, const uint8_t ucPointNr, const uint32_t uiDistance );

  inline void xTZ2PointSearch       ( TZSearchStruct& rcStruct );

  inline void xTZ4PointSquareSearch ( TZSearchStruct& rcStruct, const int iStartX, const int iStartY, const int iDist );

  inline void xTZ8PointSquareSearch ( TZSearchStruct& rcStruct, const int iStartX, const int iStartY, const int iDist );

  inline void xTZ8PointDiamondSearch( TZSearchStruct& rcStruct, const int iStartX, const int iStartY, const int iDist, const bool bCheckCornersAtDist1 );

  // -------------------------------------------------------------------------------------------------------------------

  // Inter search (AMP)

  // -------------------------------------------------------------------------------------------------------------------

  void       xEstimateMvPredAMVP  ( CodingUnit& cu, CPelUnitBuf& origBuf, RefPicList refPicList, int iRefIdx, Mv& rcMvPred, AMVPInfo& amvpInfo, Distortion& distBiP );

  void       xCheckBestMVP        ( RefPicList refPicList, const Mv& cMv, Mv& rcMvPred, int& riMVPIdx, AMVPInfo& amvpInfo, uint32_t&  ruiBits, Distortion& ruiCost, const uint8_t imv);

  Distortion xGetTemplateCost     ( const CodingUnit& cu, CPelUnitBuf& origBuf, PelUnitBuf& predBuf, Mv cMvCand, int iMVPIdx, int iMVPNum, RefPicList refPicList, int iRefIdx );

  void       xCopyAMVPInfo        ( AMVPInfo* pSrc, AMVPInfo* pDst );

  uint32_t   xGetMvpIdxBits       ( int iIdx, int iNum );

  void       xGetBlkBits          ( bool bPSlice, int iPartIdx,  uint32_t uiLastMode, uint32_t uiBlkBit[3]);

  // -------------------------------------------------------------------------------------------------------------------

  // motion estimation

  // -------------------------------------------------------------------------------------------------------------------

  void 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 = false

                                  );

  void xTZSearch( const CodingUnit& cu,

                                    RefPicList            refPicList,

                                    int                   iRefIdxPred,

                                    TZSearchStruct&       cStruct,

                                    Mv&                   rcMv,

                                    Distortion&           ruiSAD,

                                    const bool            bExtendedSettings,

                                    const bool            bFastSettings = false

                                  );

  void xClipMvSearch              ( Mv& rcMv, const Position& pos, const struct Size& size, const PreCalcValues& pcv, const int ifpLines );

  void xClipMvToFppLine           ( Mv& mv, const int yB, const int nH, const int ifpLines, const PreCalcValues& pcv );

  void xCheckAndClipMvToFppLine   ( Mv& mv, const int yB, const int nH, const int ifpLines, const PreCalcValues& pcv );

  void xSetSearchRange            ( const CodingUnit& cu,

                                    const Mv&             cMvPred,

                                    const int             iSrchRng,

                                    SearchRange&          sr                                  

                                  );

  void xPatternSearchFast         ( const CodingUnit&     cu,

                                    RefPicList            refPicList,

                                    int                   iRefIdxPred,

                                    TZSearchStruct&       cStruct,

                                    Mv&                   rcMv,

                                    Distortion&           ruiSAD

                                  );

  void xPatternSearch             ( TZSearchStruct&       cStruct,

                                    Mv&                   rcMv,

                                    Distortion&           ruiSAD

                                  );

  void xPatternSearchIntRefine    ( CodingUnit&         cu,

                                    TZSearchStruct&     cStruct,

                                    Mv&                 rcMv,

                                    Mv&                 rcMvPred,

                                    int&                riMVPIdx,

                                    uint32_t&           uiBits,

                                    Distortion&         ruiCost,

                                    const AMVPInfo&     amvpInfo,

                                    double              fWeight

                                  );

  void xPatternSearchFracDIF      ( const CodingUnit&     cu,

                                    RefPicList            refPicList,

                                    int                   iRefIdx,

                                    TZSearchStruct&       cStruct,

                                    const Mv&             rcMvInt,

                                    Mv&                   rcMvHalf,

                                    Mv&                   rcMvQter,

                                    Distortion&           ruiCost

                                  );

  void 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 = BCW_DEFAULT,

                                    bool                  enforceBcwPred = false,

                                    uint32_t              BcwIdxBits = 0

                                  );

  void  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 = false

                                 );

  bool        xEstimateAffineAMVP     ( CodingUnit& cu, AffineAMVPInfo& affineAMVPInfo, CPelUnitBuf& origBuf, RefPicList refPicList, int iRefIdx, Mv acMvPred[3], Distortion& distBiP);

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

  void        xCopyAffineAMVPInfo     ( AffineAMVPInfo& src, AffineAMVPInfo& dst );

  void        xCheckBestAffineMVP     ( CodingUnit& cu, AffineAMVPInfo &affineAMVPInfo, RefPicList refPicList, Mv acMv[3], Mv acMvPred[3], int& riMVPIdx, uint32_t& ruiBits, Distortion& ruiCost );

  uint32_t    xCalcAffineMVBits       ( CodingUnit& cu, Mv mvCand[3], Mv mvPred[3]);

  Distortion  xGetSymCost             ( const CodingUnit& cu, CPelUnitBuf& origBuf, RefPicList eCurRefPicList, const MvField& cCurMvField, MvField& cTarMvField , int BcwIdx );

  Distortion  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 );

  void        xSymMotionEstimation    ( CodingUnit& cu, CPelUnitBuf& origBuf, Mv& rcMvCurPred, Mv& rcMvTarPred, RefPicList refPicList, MvField& rCurMvField, MvField& rTarMvField, Distortion& ruiCost, int BcwIdx );

  double      xGetMEDistortionWeight  ( uint8_t BcwIdx, RefPicList refPicList);

  void 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 );

  bool xReadBufferedAffineUniMv       ( CodingUnit& cu, RefPicList eRefPicList, int32_t iRefIdx, Mv acMvPred[3], Mv acMv[3], uint32_t& ruiBits, Distortion& ruiCost, int& mvpIdx, const AffineAMVPInfo& aamvpi );

  bool xReadBufferedUniMv             ( CodingUnit& cu, RefPicList eRefPicList, int32_t iRefIdx, Mv& pcMvPred, Mv& rcMv, uint32_t& ruiBits, Distortion& ruiCost);

  void xExtDIFUpSamplingH             ( CPelBuf* pcPattern, bool useAltHpelIf);

  void xExtDIFUpSamplingQ             ( CPelBuf* pcPatternKey, Mv halfPelRef, int& patternId );

  void xEncodeInterResidualQT         ( CodingStructure &cs, Partitioner &partitioner, const ComponentID compID );

  void xEstimateInterResidualQT       ( CodingStructure &cs, Partitioner &partitioner, Distortion *puiZeroDist = NULL );

  uint64_t xGetSymbolFracBitsInter    ( CodingStructure &cs, Partitioner &partitioner );

  void  xSetIntraSearchRangeIBC       ( CodingUnit& pu, int iRoiWidth, int iRoiHeight, Mv& rcMvSrchRngLT, Mv& rcMvSrchRngRB);

  void  xIBCEstimation                ( CodingUnit& cu, PelUnitBuf& origBuf, Mv* pcMvPred, Mv& rcMv, Distortion& ruiCost );

  void  xIBCSearchMVCandUpdate        ( Distortion  uiSad, int x, int y, Distortion* uiSadBestCand, Mv* cMVCand);

  int   xIBCSearchMVChromaRefine      ( CodingUnit& cu, int iRoiWidth, int iRoiHeight, int cuPelX, int cuPelY, Distortion* uiSadBestCand, Mv* cMVCand);

  void  xIntraPatternSearchIBC        ( CodingUnit& pu, TZSearchStruct& cStruct, Mv& rcMv, Distortion& ruiCost, Mv* cMvSrchRngLT, Mv* cMvSrchRngRB, Mv* pcMvPred);

};// END CLASS DEFINITION EncSearch

} // namespace vvenc

//! \}