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/** \file     IbcHashMap.h
    \brief    IBC hash map encoder class (header)
*/

#ifndef __IBCHASHMAP__
#define __IBCHASHMAP__

// Include files
#include "CommonLib/CommonDef.h"
#include "CommonLib/IntraPrediction.h"
#include "CommonLib/InterPrediction.h"
#include "CommonLib/TrQuant.h"
#include "CommonLib/Unit.h"
#include "CommonLib/UnitPartitioner.h"

#include <unordered_map>
#include <vector>
//! \ingroup EncoderLib
//! \{

// ====================================================================================================================
// Class definition
// ====================================================================================================================

class IbcHashMap
{
private:
  int     m_picWidth;
  int     m_picHeight;
  unsigned int**  m_pos2Hash;
  std::unordered_map<unsigned int, std::vector<Position>> m_hash2Pos;

  unsigned int xxCalcBlockHash(const Pel *pel, const ptrdiff_t stride, const int width, const int height,
                               unsigned int crc);

  template<ChromaFormat chromaFormat>
  void    xxBuildPicHashMap(const PelUnitBuf& pic);

  static  uint32_t xxComputeCrc32c16bit(uint32_t crc, const Pel pel);

public:
  uint32_t (*m_computeCrc32c) (uint32_t crc, const Pel pel);

  IbcHashMap();
  virtual ~IbcHashMap();

  void    init(const int picWidth, const int picHeight);
  void    destroy();
  void    rebuildPicHashMap(const PelUnitBuf& pic);
  bool    ibcHashMatch(const Area& lumaArea, std::vector<Position>& cand, const CodingStructure& cs, const int maxCand, const int searchRange4SmallBlk);
  int     getHashHitRatio(const Area& lumaArea);

  int     calHashBlkMatchPerc(const Area& lumaArea);

#ifdef TARGET_SIMD_X86
  void    initIbcHashMapX86();
  template <X86_VEXT vext>
  void    _initIbcHashMapX86();
#endif

};

//! \}

#endif // __IBCHASHMAP__