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/** \file     Quant.h
    \brief    base quantization class (header)
*/

#pragma once

#include "CommonDef.h"
#include "Unit.h"
#include "ChromaFormat.h"
#include "Contexts.h"
#include "ContextModelling.h"

#include "UnitPartitioner.h"

namespace vvdec
{
using namespace x86_simd;

// ====================================================================================================================
// Constants
// ====================================================================================================================

#define QP_BITS                 15

// ====================================================================================================================
// Class definition
// ====================================================================================================================
struct TrQuantParams
{
  int     rightShift;
  int     qScale;
};

/// QP struct
class QpParam
{
public:
  short  Qps[2];
  int8_t pers[2];
  int8_t rems[2];

  QpParam(const TransformUnit& tu, const ComponentID &compID, const bool allowACTQpoffset = true);

  int Qp ( const bool ts ) const { return Qps [ts?1:0]; }
  int per( const bool ts ) const { return pers[ts?1:0]; }
  int rem( const bool ts ) const { return rems[ts?1:0]; }

}; // END STRUCT DEFINITION QpParam

/// transform and quantization class
class Quant
{
public:
  int* getDequantCoeff           ( uint32_t list, uint32_t sizeX, uint32_t sizeY ) { return m_dequantCoef[sizeX][sizeY][list]; };  //!< get DeQuant Coefficent

  void setUseScalingList         ( bool bUseScalingList ) { m_scalingListEnabledFlag = bUseScalingList; };
  bool getUseScalingList         ( bool isTransformSkip, const bool lfnstApplied, const bool disableScalingMatrixForLFNSTBlks, const bool disableSMforACT)
  {
    return( m_scalingListEnabledFlag && !isTransformSkip && (!lfnstApplied || !disableScalingMatrixForLFNSTBlks) && !disableSMforACT);
  }
  void setScalingListDec         ( const ScalingList &scalingList);
  bool processScalingListDec     ( const int *coeff, int *dequantcoeff, uint32_t height, uint32_t width, uint32_t ratio, int sizuNum, uint32_t dc);

  Quant( const Quant* other );
  ~Quant();

  // initialize class
  void init( const Picture *pic );
public:
  // de-quantization
  void dequant           ( const TransformUnit &tu, CoeffBuf &dstCoeff, const ComponentID &compID, const QpParam &cQP );

private:
  void xInitScalingList   ( const Quant* other );
  void xDestroyScalingList();
  bool xSetScalingListDec( const ScalingList &scalingList, uint32_t list, uint32_t size, uint32_t scalingListId );
  void xSetRecScalingListDec( const ScalingList &scalingList, uint32_t list, uint32_t sizew, uint32_t sizeh, uint32_t scalingListId );
  bool m_scalingListEnabledFlag;

  int *m_dequantCoef   [SCALING_LIST_SIZE_NUM][SCALING_LIST_SIZE_NUM][SCALING_LIST_NUM]; ///< array of dequantization matrix coefficient 4x4
  int *m_dequantCoefBuf;
  bool m_ownDequantCoeff;


  void ( *DeQuant    ) (const int maxX,const int restX,const int maxY,const int scale,const TCoeffSig*const piQCoef,const size_t piQCfStride,TCoeff   *const piCoef,const int rightShift,const int inputMaximum,const TCoeff transformMaximum);
  void ( *DeQuantPCM ) (const int maxX,const int restX,const int maxY,const int scale,      TCoeff   *const piQCoef,const size_t piQCfStride,TCoeff   *const piCoef,const int rightShift,const int inputMaximum,const TCoeff transformMaximum);

#if ENABLE_SIMD_OPT_QUANT && defined( TARGET_SIMD_X86 )

  void initQuantX86();
  template <X86_VEXT vext>
  void _initQuantX86();
#endif
};// END CLASS DEFINITION Quant

}   // namespace vvdec