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

#pragma once

#include "CommonDef.h"
#include "Common.h"
#include "Unit.h"

//! \ingroup CommonLib
//! \{

namespace vvenc {

using namespace x86_simd;
using namespace arm_simd;

#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
/**
 * \brief Interpolation filter class
 */
class InterpolationFilter
{
  static const TFilterCoeff m_lumaFilter4x4[LUMA_INTERPOLATION_FILTER_SUB_SAMPLE_POSITIONS+1][NTAPS_LUMA];
  static const TFilterCoeff m_lumaFilter[LUMA_INTERPOLATION_FILTER_SUB_SAMPLE_POSITIONS+1][NTAPS_LUMA]; ///< Luma filter taps
  static const TFilterCoeff m_lumaAltHpelIFilter[NTAPS_LUMA]; ///< Luma filter taps
  static const TFilterCoeff m_chromaFilter[CHROMA_INTERPOLATION_FILTER_SUB_SAMPLE_POSITIONS+1][NTAPS_CHROMA]; ///< Chroma 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);
  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);

  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);

  template<bool isLast, int w>
  static void filterXxY_N2     (const ClpRng& clpRng, Pel const *src, int srcStride, Pel* dst, int dstStride, int width, int height, TFilterCoeff const *coeffH, TFilterCoeff const *coeffV);
  template<bool isLast, int w>
  static void filterXxY_N4     (const ClpRng& clpRng, Pel const *src, int srcStride, Pel* dst, int dstStride, int width, int height, TFilterCoeff const *coeffH, TFilterCoeff const *coeffV);
  template<bool isLast, int w>
  static void filterXxY_N8     (const ClpRng& clpRng, Pel const *src, int srcStride, Pel* dst, int dstStride, int width, int height, TFilterCoeff const *coeffH, TFilterCoeff const *coeffV);

  static void scalarFilterN2_2D(const ClpRng& clpRng, Pel const *src, int srcStride, Pel* dst, int dstStride, int width, int height, TFilterCoeff const *ch,     TFilterCoeff const *cv);

  static void xWeightedGeoBlk(const ClpRngs &clpRngs, const CodingUnit& cu, const uint32_t width,
                              const uint32_t height, const ComponentID compIdx, const uint8_t splitDir,
                              PelUnitBuf &predDst, PelUnitBuf &predSrc0, PelUnitBuf &predSrc1);
  void weightedGeoBlk(const ClpRngs &clpRngs, const CodingUnit& cu, const uint32_t width, const uint32_t height,
                      const ComponentID compIdx, const uint8_t splitDir, PelUnitBuf &predDst, PelUnitBuf &predSrc0,
                      PelUnitBuf &predSrc1);
  InterpolationFilter();
  ~InterpolationFilter() {}

  void( *m_filterN2_2D        )( const ClpRng& clpRng, Pel const *src, int srcStride, Pel* dst, int dstStride, int width, int height, TFilterCoeff const *ch, TFilterCoeff const *cv );
  void( *m_filterHor[4][2][2] )( const ClpRng& clpRng, Pel const *src, int srcStride, Pel* dst, int dstStride, int width, int height, TFilterCoeff const *coeff);
  void( *m_filterVer[4][2][2] )( const ClpRng& clpRng, Pel const *src, int srcStride, Pel* dst, int dstStride, int width, int height, TFilterCoeff const *coeff);
  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_filter4x4  [2][2] ) ( const ClpRng& clpRng, Pel const *src, int srcStride, Pel* dst, int dstStride, int width, int height, TFilterCoeff const *coeffH, TFilterCoeff const *coeffV );
  void( *m_filter8x8  [3][2] ) ( const ClpRng& clpRng, Pel const *src, int srcStride, Pel* dst, int dstStride, int width, int height, TFilterCoeff const *coeffH, TFilterCoeff const *coeffV );
  void( *m_filter16x16[3][2] ) ( const ClpRng& clpRng, Pel const *src, int srcStride, Pel* dst, int dstStride, int width, int height, TFilterCoeff const *coeffH, TFilterCoeff const *coeffV );
  void (*m_weightedGeoBlk)(const ClpRngs &clpRngs, const CodingUnit& cu, 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
	
#ifdef TARGET_SIMD_ARM
  void initInterpolationFilterARM();
  template <ARM_VEXT vext>
  void _initInterpolationFilterARM();
#endif

  void filterN2_2D(const ComponentID compID, Pel const *src, int srcStride, Pel* dst, int dstStride, int width, int height, int fracX, int fracY,                                        const ClpRng& clpRng);
  void filter4x4  (const ComponentID compID, Pel const *src, int srcStride, Pel* dst, int dstStride, int width, int height, int fracX, int fracY,   bool isLast, const ChromaFormat fmt, const ClpRng& clpRng, bool useAltHpelIf = false, int nFilterIdx = 0);
  void filter8x8  (const ComponentID compID, Pel const *src, int srcStride, Pel* dst, int dstStride, int width, int height, int fracX, int fracY,   bool isLast, const ChromaFormat fmt, const ClpRng& clpRng, bool useAltHpelIf = false, int nFilterIdx = 0);
  void filter16x16(const ComponentID compID, Pel const *src, int srcStride, Pel* dst, int dstStride, int width, int height, int fracX, int fracY,   bool isLast, const ChromaFormat fmt, const ClpRng& clpRng, bool useAltHpelIf = false, int nFilterIdx = 0);
  void filterHor  (const ComponentID compID, Pel const* src, int srcStride, Pel* dst, int dstStride, int width, int height, int frac,               bool isLast, const ChromaFormat fmt, const ClpRng& clpRng, bool useAltHpelIf = false, int nFilterIdx = 0, int reduceTap = 0);
  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 ChromaFormat fmt, const ClpRng& clpRng, bool useAltHpelIf = false, int nFilterIdx = 0, int reduceTap = 0);

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

} // namespace vvenc

//! \}

