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/**
 * \file
 * \brief Declaration of InterpolationFilter class
 */

#ifndef __INTERPOLATIONFILTER__
#define __INTERPOLATIONFILTER__

#include "CommonDef.h"
#include "CacheModel.h"

//! \ingroup CommonLib
//! \{

#define IF_INTERNAL_PREC 14 ///< Number of bits for internal precision
#define IF_FILTER_PREC    6 ///< Log2 of sum of filter taps
#define IF_INTERNAL_OFFS (1<<(IF_INTERNAL_PREC-1)) ///< Offset used internally
#define IF_INTERNAL_PREC_BILINEAR 10 ///< Number of bits for internal precision
#define IF_FILTER_PREC_BILINEAR   4  ///< Bilinear filter coeff precision so that intermediate value will not exceed 16 bit for SIMD - bit exact
#define IF_INTERNAL_FRAC_BITS(bd) std::max(2, IF_INTERNAL_PREC - int(bd))
/**
 * \brief Interpolation filter class
 */
class InterpolationFilter
{
  static const TFilterCoeff m_lumaFilter4x4[LUMA_INTERPOLATION_FILTER_SUB_SAMPLE_POSITIONS][NTAPS_LUMA];
public:
  static const TFilterCoeff m_lumaFilter[LUMA_INTERPOLATION_FILTER_SUB_SAMPLE_POSITIONS][NTAPS_LUMA]; ///< Luma filter taps
  static const TFilterCoeff m_chromaFilter[CHROMA_INTERPOLATION_FILTER_SUB_SAMPLE_POSITIONS][NTAPS_CHROMA]; ///< Chroma filter taps
  static const TFilterCoeff m_lumaFilterRPR1[LUMA_INTERPOLATION_FILTER_SUB_SAMPLE_POSITIONS][NTAPS_LUMA]; ///< Luma filter taps 1.5x
  static const TFilterCoeff m_lumaFilterRPR2[LUMA_INTERPOLATION_FILTER_SUB_SAMPLE_POSITIONS][NTAPS_LUMA]; ///< Luma filter taps 2x
  static const TFilterCoeff m_chromaFilterRPR1[CHROMA_INTERPOLATION_FILTER_SUB_SAMPLE_POSITIONS][NTAPS_CHROMA]; ///< Chroma filter taps 1.5x
  static const TFilterCoeff m_chromaFilterRPR2[CHROMA_INTERPOLATION_FILTER_SUB_SAMPLE_POSITIONS][NTAPS_CHROMA]; ///< Chroma filter taps 2x
  static const TFilterCoeff m_affineLumaFilterRPR1[LUMA_INTERPOLATION_FILTER_SUB_SAMPLE_POSITIONS][NTAPS_LUMA]; ///< Luma filter taps 1.5x
  static const TFilterCoeff m_affineLumaFilterRPR2[LUMA_INTERPOLATION_FILTER_SUB_SAMPLE_POSITIONS][NTAPS_LUMA]; ///< Luma filter taps 2x
private:
  static const TFilterCoeff m_lumaAltHpelIFilter[NTAPS_LUMA]; ///< Luma filter taps
  static const TFilterCoeff m_bilinearFilterPrec4[LUMA_INTERPOLATION_FILTER_SUB_SAMPLE_POSITIONS][NTAPS_BILINEAR]; ///< bilinear filter taps
public:
  template<bool isFirst, bool isLast>
  static void filterCopy( const ClpRng& clpRng, const Pel *src, int srcStride, Pel *dst, int dstStride, int width, int height, bool biMCForDMVR);

  template<int N, bool isVertical, bool isFirst, bool isLast>
  static void filter(const ClpRng& clpRng, Pel const *src, int srcStride, Pel *dst, int dstStride, int width, int height, TFilterCoeff const *coeff, bool biMCForDMVR);
  template<int N>
  void filterHor(const ClpRng& clpRng, Pel const* src, int srcStride, Pel *dst, int dstStride, int width, int height, bool isLast, TFilterCoeff const *coeff, bool biMCForDMVR);

  template<int N>
  void filterVer(const ClpRng& clpRng, Pel const* src, int srcStride, Pel *dst, int dstStride, int width, int height, bool isFirst, bool isLast, TFilterCoeff const *coeff, bool biMCForDMVR);

  static void xWeightedGeoBlk(const PredictionUnit &pu, const uint32_t width, const uint32_t height, const ComponentID compIdx, const uint8_t splitDir, PelUnitBuf& predDst, PelUnitBuf& predSrc0, PelUnitBuf& predSrc1);
  void weightedGeoBlk(const PredictionUnit &pu, const uint32_t width, const uint32_t height, const ComponentID compIdx, const uint8_t splitDir, PelUnitBuf& predDst, PelUnitBuf& predSrc0, PelUnitBuf& predSrc1);
protected:
#if JVET_J0090_MEMORY_BANDWITH_MEASURE
  static CacheModel* m_cacheModel;
#endif
public:
  InterpolationFilter();
  ~InterpolationFilter() {}
  void( *m_filterHor[3][2][2] )( const ClpRng& clpRng, Pel const *src, int srcStride, Pel *dst, int dstStride, int width, int height, TFilterCoeff const *coeff, bool biMCForDMVR);
  void( *m_filterVer[3][2][2] )( const ClpRng& clpRng, Pel const *src, int srcStride, Pel *dst, int dstStride, int width, int height, TFilterCoeff const *coeff, bool biMCForDMVR);
  void( *m_filterCopy[2][2] )  ( const ClpRng& clpRng, Pel const *src, int srcStride, Pel *dst, int dstStride, int width, int height, bool biMCForDMVR);
  void( *m_weightedGeoBlk )(const PredictionUnit &pu, const uint32_t width, const uint32_t height, const ComponentID compIdx, const uint8_t splitDir, PelUnitBuf& predDst, PelUnitBuf& predSrc0, PelUnitBuf& predSrc1);

  void initInterpolationFilter( bool enable );
#ifdef TARGET_SIMD_X86
  void initInterpolationFilterX86();
  template <X86_VEXT vext>
  void _initInterpolationFilterX86();
#endif
  void filterHor(const ComponentID compID, Pel const *src, int srcStride, Pel *dst, int dstStride, int width,
                 int height, int frac, bool isLast, const ClpRng &clpRng, int nFilterIdx = 0, bool biMCForDMVR = false,
                 bool useAltHpelIf = false);
  void filterVer(const ComponentID compID, Pel const *src, int srcStride, Pel *dst, int dstStride, int width,
                 int height, int frac, bool isFirst, bool isLast, const ClpRng &clpRng, int nFilterIdx = 0,
                 bool biMCForDMVR = false, bool useAltHpelIf = false);
#if JVET_J0090_MEMORY_BANDWITH_MEASURE
  void cacheAssign( CacheModel *cache ) { m_cacheModel = cache; }
#endif

  static TFilterCoeff const * const getChromaFilterTable(const int deltaFract) { return m_chromaFilter[deltaFract]; };
};

//! \}

#endif
