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/** \file     RdCost.h

    \brief    RD cost computation classes (header)

*/

#pragma once

#include "CommonDef.h"

#include "Buffer.h"

namespace vvdec

{

#if defined(TARGET_SIMD_X86)  && ENABLE_SIMD_OPT_DIST

using namespace x86_simd;

#endif

#if defined(TARGET_SIMD_ARM)  && ENABLE_SIMD_OPT_DIST

using namespace arm_simd;

#endif

class DistParam;

class EncCfg;

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

// Type definition

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

// for function pointer

typedef Distortion (*FpDistFunc) (const DistParam&);

typedef void (*FpDistFuncX5)(const DistParam&, Distortion*, bool);

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

// Class definition

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

/// distortion parameter class

class DistParam

{

public:

  CPelBuf               org;

  CPelBuf               cur;

  FpDistFunc            distFunc;

  FpDistFuncX5          distFuncX5;

  int                   bitDepth;

  // (vertical) subsampling shift (for reducing complexity)

  // - 0 = no subsampling, 1 = even rows, 2 = every 4th, etc.

  int                   subShift;

  DistParam() :

  org(), cur(), bitDepth( 0 ), subShift( 0 )

  { }

};

/// RD cost computation class

class RdCost

{

private:

  // for distortion

  FpDistFunc m_afpDistortFunc[DF_TOTAL_FUNCTIONS]; // [eDFunc]

  FpDistFuncX5 m_afpDistortFuncX5[DF_TOTAL_FUNCTIONS]; // [eDFunc]

public:

  RdCost( bool enableOpt = true );

  ~RdCost();

  void setDistParam( DistParam &rcDP, const Pel* pOrg, const Pel* piRefY, ptrdiff_t iOrgStride, ptrdiff_t iRefStride, int bitDepth, int width, int height, int subShiftMode = 0 );

  static Distortion xGetSAD8          ( const DistParam& pcDtParam );

  static Distortion xGetSAD16         ( const DistParam& pcDtParam );

  static void       xGetSAD8X5        ( const DistParam& pcDtParam, Distortion* cost, bool isCalCentrePos );

  static void       xGetSAD16X5       ( const DistParam& pcDtParam, Distortion* cost, bool isCalCentrePos );

private:

#if defined(TARGET_SIMD_X86)  && ENABLE_SIMD_OPT_DIST

  void initRdCostX86();

  template<X86_VEXT vext>

  void _initRdCostX86();

#endif

#if defined(TARGET_SIMD_ARM)  && ENABLE_SIMD_OPT_DIST

  void initRdCostARM();

  template<ARM_VEXT vext>

  void _initRdCostARM();

#endif   // TARGET_SIMD_ARM

};   // END CLASS DEFINITION RdCost

}   // namespace vvdec