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/** \file     EncModeCtrl.h

    \brief    Encoder controller for trying out specific modes

*/

#pragma once

#include "InterSearch.h"

#include "CommonLib/CommonDef.h"

#include "CommonLib/CodingStructure.h"

#include <typeinfo>

#include <vector>

//! \ingroup EncoderLib

//! \{

namespace vvenc {

//////////////////////////////////////////////////////////////////////////

// Encoder modes to try out

//////////////////////////////////////////////////////////////////////////

enum EncTestModeType

{

  ETM_MERGE_SKIP,

  ETM_INTER_ME,

  ETM_INTER_IMV,

  ETM_INTRA,

  ETM_SPLIT_QT,

  ETM_SPLIT_BT_H,

  ETM_SPLIT_BT_V,

  ETM_SPLIT_TT_H,

  ETM_SPLIT_TT_V,

  ETM_RECO_CACHED,

  ETM_IBC,

  ETM_IBC_MERGE,

  ETM_INVALID

};

enum EncTestModeOpts

{

  ETO_STANDARD    =  0,                   // empty      (standard option)

  ETO_FORCE_MERGE =  1<<0,                // bit   0    (indicates forced merge)

  ETO_IMV_SHIFT   =  1,                   // bits  1-3  (imv parameter starts at bit 1)

  ETO_IMV         =  7<<ETO_IMV_SHIFT,    // bits  1-3  (imv parameter uses 3 bits)

  ETO_DUMMY       =  1<<5,                // bit   5    (dummy)

  ETO_INVALID     = 0xffffffff            // bits 0-31  (invalid option)

};

static inline void getAreaIdxNew(const Area& area, const PreCalcValues &pcv, unsigned& idx1, unsigned& idx2, unsigned& idx3, unsigned& idx4)

{

  idx1 = Log2( area.width  )-2;

  idx2 = Log2( area.height )-2;

  idx3 = (area.x & pcv.maxCUSizeMask) >> MIN_CU_LOG2;

  idx4 = (area.y & pcv.maxCUSizeMask) >> MIN_CU_LOG2;

}

Unexecuted instantiation: vvencimpl.cpp:vvenc::getAreaIdxNew(vvenc::Area const&, vvenc::PreCalcValues const&, unsigned int&, unsigned int&, unsigned int&, unsigned int&)

Unexecuted instantiation: EncLib.cpp:vvenc::getAreaIdxNew(vvenc::Area const&, vvenc::PreCalcValues const&, unsigned int&, unsigned int&, unsigned int&, unsigned int&)

Unexecuted instantiation: EncGOP.cpp:vvenc::getAreaIdxNew(vvenc::Area const&, vvenc::PreCalcValues const&, unsigned int&, unsigned int&, unsigned int&, unsigned int&)

Unexecuted instantiation: EncPicture.cpp:vvenc::getAreaIdxNew(vvenc::Area const&, vvenc::PreCalcValues const&, unsigned int&, unsigned int&, unsigned int&, unsigned int&)

Unexecuted instantiation: EncSlice.cpp:vvenc::getAreaIdxNew(vvenc::Area const&, vvenc::PreCalcValues const&, unsigned int&, unsigned int&, unsigned int&, unsigned int&)

Unexecuted instantiation: InterSearch.cpp:vvenc::getAreaIdxNew(vvenc::Area const&, vvenc::PreCalcValues const&, unsigned int&, unsigned int&, unsigned int&, unsigned int&)

Unexecuted instantiation: EncCu.cpp:vvenc::getAreaIdxNew(vvenc::Area const&, vvenc::PreCalcValues const&, unsigned int&, unsigned int&, unsigned int&, unsigned int&)

Unexecuted instantiation: EncModeCtrl.cpp:vvenc::getAreaIdxNew(vvenc::Area const&, vvenc::PreCalcValues const&, unsigned int&, unsigned int&, unsigned int&, unsigned int&)

Unexecuted instantiation: IntraSearch.cpp:vvenc::getAreaIdxNew(vvenc::Area const&, vvenc::PreCalcValues const&, unsigned int&, unsigned int&, unsigned int&, unsigned int&)

struct EncTestMode

{

  EncTestMode()

    : type( ETM_INVALID ), opts( ETO_INVALID  ), qp( -1  ), lossless( false ) {}

  EncTestMode( EncTestModeType _type )

    : type( _type       ), opts( ETO_STANDARD ), qp( -1  ), lossless( false ) {}

  EncTestMode( EncTestModeType _type, int _qp, bool _lossless )

    : type( _type       ), opts( ETO_STANDARD ), qp( _qp ), lossless( _lossless ) {}

  EncTestMode( EncTestModeType _type, EncTestModeOpts _opts, int _qp, bool _lossless )

    : type( _type       ), opts( _opts        ), qp( _qp ), lossless( _lossless ) {}

  EncTestModeType type;

  EncTestModeOpts opts;

  int             qp;

  bool            lossless;

  double          maxCostAllowed;

};

inline bool isModeSplit( const EncTestMode& encTestmode )

{

  switch( encTestmode.type )

  {

  case ETM_SPLIT_QT     :

  case ETM_SPLIT_BT_H   :

  case ETM_SPLIT_BT_V   :

  case ETM_SPLIT_TT_H   :

  case ETM_SPLIT_TT_V   :

    return true;

  default:

    return false;

  }

}

inline bool isModeNoSplit( const EncTestMode& encTestmode )

{

  return !isModeSplit( encTestmode );

}

inline bool isModeInter( const EncTestMode& encTestmode ) // perhaps remove

{

  return (   encTestmode.type == ETM_INTER_ME

          || encTestmode.type == ETM_INTER_IMV

          || encTestmode.type == ETM_MERGE_SKIP

         );

}

inline PartSplit getPartSplit( const EncTestMode& encTestmode )

{

  switch( encTestmode.type )

  {

  case ETM_SPLIT_QT     : return CU_QUAD_SPLIT;

  case ETM_SPLIT_BT_H   : return CU_HORZ_SPLIT;

  case ETM_SPLIT_BT_V   : return CU_VERT_SPLIT;

  case ETM_SPLIT_TT_H   : return CU_TRIH_SPLIT;

  case ETM_SPLIT_TT_V   : return CU_TRIV_SPLIT;

  default:                return CU_DONT_SPLIT;

  }

}

//////////////////////////////////////////////////////////////////////////

// EncModeCtrl controls if specific modes should be tested

//////////////////////////////////////////////////////////////////////////

struct ComprCUCtx

{

  ComprCUCtx()

  {

  }

  ComprCUCtx( const CodingStructure& cs, const uint32_t _minDepth, const uint32_t _maxDepth )

    : minDepth      ( _minDepth  )

    , maxDepth      ( _maxDepth  )

    , bestCS        ( nullptr    )

    , bestCU        ( nullptr    )

    , bestTU        ( nullptr    )

    , bestMode      ()

    , bestCostBeforeSplit   (MAX_DOUBLE)

    , bestCostVertSplit     (MAX_DOUBLE)

    , bestCostHorzSplit     (MAX_DOUBLE)

    , bestCostNoImv         (MAX_DOUBLE *.5)

    , grad_horVal           (0)

    , grad_verVal           (0)

    , grad_dupVal           (0)

    , grad_dowVal           (0)

    , interHad              (MAX_DISTORTION)

    , maxQtSubDepth         (0)

    , isReusingCu           (false)

    , qtBeforeBt            (false)

    , doTriHorzSplit        (false)

    , doTriVertSplit        (false)

    , didQuadSplit          (false)

    , didHorzSplit          (false)

    , didVertSplit          (false)

    , doHorChromaSplit      (false)

    , doVerChromaSplit      (false)

    , doQtChromaSplit       (false)

    , isBestNoSplitSkip     (false)

    , intraWasTested        (false)

    , relatedCuIsValid      (false)

    , isIntra               (false)

    , nonSkipWasTested      (false)

    , bestNsPredMode        (EncTestMode())

  {

  }

  unsigned          minDepth;

  unsigned          maxDepth;

  CodingStructure*  bestCS;

  CodingUnit*       bestCU;

  TransformUnit*    bestTU;

  EncTestMode       bestMode;

  double            bestCostBeforeSplit;

  double            bestCostVertSplit;

  double            bestCostHorzSplit;

  double            bestCostNoImv;

  double            grad_horVal;

  double            grad_verVal;

  double            grad_dupVal;

  double            grad_dowVal;

  Distortion        interHad;

  int               maxQtSubDepth;

  bool              isReusingCu;

  bool              qtBeforeBt;

  bool              doTriHorzSplit;

  bool              doTriVertSplit;

  int               doMoreSplits;

  bool              didQuadSplit;

  bool              didHorzSplit;

  bool              didVertSplit;

  bool              doHorChromaSplit;

  bool              doVerChromaSplit;

  bool              doQtChromaSplit;

  bool              isBestNoSplitSkip;

  bool              intraWasTested;

  bool              relatedCuIsValid;

  bool              isIntra;

  bool              nonSkipWasTested;

  EncTestMode       bestNsPredMode;

};

//////////////////////////////////////////////////////////////////////////

// some utility interfaces that expose some functionality that can be used without concerning about which particular controller is used

//////////////////////////////////////////////////////////////////////////

static const int MAX_STORED_CU_INFO_REFS = 4;

struct CodedCUInfo

{

  bool      relatedCuIsValid;

  bool      isInter;

  bool      isIntra;

  bool      isSkip;

  bool      isMMVDSkip;

  bool      isIBC;

  uint8_t   BcwIdx;

  uint8_t   numPuInfoStored;

  int       poc, ctuRsAddr;

  bool      validMv[NUM_REF_PIC_LIST_01][MAX_STORED_CU_INFO_REFS];

  Mv        saveMv [NUM_REF_PIC_LIST_01][MAX_STORED_CU_INFO_REFS];

  uint32_t  puSse  [SBT_NUM_SL];

  uint8_t   puSbt  [SBT_NUM_SL];

  double    bestCost;

  bool getMv  ( const RefPicList refPicList, const int iRefIdx,       Mv& rMv ) const;

  void setMv  ( const RefPicList refPicList, const int iRefIdx, const Mv& rMv );

};

class CacheBlkInfoCtrl

{

protected:

  // x in CTU, y in CTU, width, height

  CodedCUInfo*         m_codedCUInfo[6][6][MAX_CU_SIZE >> MIN_CU_LOG2][MAX_CU_SIZE >> MIN_CU_LOG2];

  CodedCUInfo*         m_codedCUInfoBuf;

  const PreCalcValues* m_pcv;

protected:

  void create   ( int ctuSize );

  void destroy  ();

  void init     ( const Slice &slice );

public:

  CacheBlkInfoCtrl() : m_codedCUInfoBuf( nullptr ) {}

  ~CacheBlkInfoCtrl () {}

  CodedCUInfo& getBlkInfo   ( const UnitArea& area );

  void         initBlk      ( const UnitArea& area, int poc );

  uint8_t      findBestSbt  ( const UnitArea& area, const uint32_t curPuSse );

  bool         saveBestSbt  ( const UnitArea& area, const uint32_t curPuSse, const uint8_t curPuSbt );

};

struct BestEncodingInfo

{ 

  CodingUnit      cu;

  TransformUnit   tu;

  EncTestMode     testMode;

  int             poc;

  Distortion      dist;

  double          costEDO;

};

class BestEncInfoCache

{

private:

  const PreCalcValues* m_pcv;

  BestEncodingInfo*    m_bestEncInfo[6][6][MAX_CU_SIZE >> MIN_CU_LOG2][MAX_CU_SIZE >> MIN_CU_LOG2];

  TCoeffSig*           m_pCoeff;

  BestEncodingInfo*    m_encInfoBuf;

  Mv*                  m_dmvrMvBuf;

  CodingStructure      m_dummyCS;

  XUCache              m_dummyCache;

protected:

  bool                 m_reuseCuResults;

  void create   ( const bool reuseCuResults, const ChromaFormat chFmt, int ctuSize );

  void destroy  ();

public:

  BestEncInfoCache() : m_pcv( nullptr ), m_pCoeff( nullptr ), m_encInfoBuf( nullptr ), m_dmvrMvBuf( nullptr ), m_dummyCS( m_dummyCache, nullptr ) {}

  ~BestEncInfoCache() {}

  void init             ( const Slice &slice );

  bool setCsFrom        (       CodingStructure& cs,       EncTestMode& testMode, const Partitioner& partitioner ) const;

  bool setFromCs        ( const CodingStructure& cs, const EncTestMode& testMode, const Partitioner& partitioner );

  bool isReusingCuValid ( const CodingStructure &cs, const Partitioner &partitioner, int qp );

};

//////////////////////////////////////////////////////////////////////////

// EncModeCtrl - allows and controls modes introduced by QTBT (inkl. multi-type-tree)

//                    - only 2Nx2N, no RQT, additional binary/triary CU splits

//////////////////////////////////////////////////////////////////////////

class EncModeCtrl: public CacheBlkInfoCtrl, public BestEncInfoCache

{

protected:

  const VVEncCfg*       m_pcEncCfg;

        RdCost*         m_pcRdCost;

  static_vector<ComprCUCtx, ( MAX_CU_DEPTH << 2 )> m_ComprCUCtxList;

  unsigned              m_skipThresholdE0023FastEnc;

  unsigned              m_tileIdx;

public:

  ComprCUCtx*           comprCUCtx;

  ~EncModeCtrl    () { destroy(); }

  void init               ( const VVEncCfg& encCfg, RdCost *pRdCost );

  void destroy            ();

  void initCTUEncoding    ( const Slice &slice, int tileIdx );

  void initCULevel        ( Partitioner &partitioner, const CodingStructure& cs, int  MergeSimpleFlag );

  void finishCULevel      ( Partitioner &partitioner );

  bool tryMode            ( const EncTestMode& encTestmode, const CodingStructure &cs, Partitioner& partitioner );

  bool trySplit           ( const EncTestMode& encTestmode, const CodingStructure &cs, Partitioner& partitioner, const EncTestMode& lastTestmode );

  bool useModeResult      ( const EncTestMode& encTestmode, CodingStructure*& tempCS,  Partitioner& partitioner, const bool useEDO );

  void beforeSplit        ( Partitioner& partitioner );

};

} // namespace vvenc

//! \}