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/** \file     Quant.h

    \brief    base quantization class (header)

*/

#pragma once

#include "CommonDef.h"

#include "Unit.h"

namespace vvdec

{

struct Picture;

class ScalingList;

#if ENABLE_SIMD_OPT_QUANT && defined( TARGET_SIMD_X86 )

using namespace x86_simd;

#endif

#if ENABLE_SIMD_OPT_QUANT && defined( TARGET_SIMD_ARM )

using namespace arm_simd;

#endif

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

// 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, bool enableOpt = true );

  ~Quant();

  // initialize class

  void init( const Picture *pic );

  // de-quantization

  void dequant           ( const TransformUnit &tu, CoeffBuf &dstCoeff, const ComponentID &compID, const QpParam &cQP );

  template<class T>

  static void DeQuantCore( const SizeType width,

                           const int      maxX,

                           const int      maxY,

                           const int      scale,

                           const T* const piQCoef,

                           const size_t   piQCfStride,

                           TCoeff* const  piCoef,

                           const int      rightShift,

                           const int      inputMaximum,

                           const TCoeff   transformMaximum );

  template<class T>

  static void DeQuantScalingCore( const SizeType width,

                                  const int      maxX,

                                  const int      maxY,

                                  const int      scaleQP,

                                  const int*     piDequantCoef,

                                  const T* const piQCoef,

                                  const size_t   piQCfStride,

                                  TCoeff* const  piCoef,

                                  const int      rightShift,

                                  const int      inputMaximum,

                                  const TCoeff   transformMaximum );

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

  void ( *DeQuantScaling    ) (const SizeType width, const int maxX, const int maxY, const int scaleQP, const int* piDequantCoef, const TCoeffSig* const piQCoef, const size_t piQCfStride, TCoeff* const piCoef, const int rightShift, const int inputMaximum, const TCoeff transformMaximum);

  void ( *DeQuantScalingPCM ) (const SizeType width, const int maxX, const int maxY, const int scaleQP, const int* piDequantCoef, const TCoeff   * const piQCoef, const size_t piQCfStride, TCoeff* const piCoef, const int rightShift, const int inputMaximum, const TCoeff transformMaximum);

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;

#if ENABLE_SIMD_OPT_QUANT && defined( TARGET_SIMD_X86 )

  void initQuantX86();

  template <X86_VEXT vext>

  void _initQuantX86();

#endif

#if ENABLE_SIMD_OPT_QUANT && defined( TARGET_SIMD_ARM )

  void initQuantARM();

  template <ARM_VEXT vext>

  void _initQuantARM();

#endif

};// END CLASS DEFINITION Quant

}   // namespace vvdec