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/**
 \file     EncSampleAdaptiveOffset.h
 \brief    estimation part of sample adaptive offset class (header)
 */

#ifndef __ENCSAMPLEADAPTIVEOFFSET__
#define __ENCSAMPLEADAPTIVEOFFSET__

#include "CommonLib/SampleAdaptiveOffset.h"

#include "CABACWriter.h"

//! \ingroup EncoderLib
//! \{

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

struct SAOStatData //data structure for SAO statistics
{
  int64_t diff[MAX_NUM_SAO_CLASSES];
  int64_t count[MAX_NUM_SAO_CLASSES];

  SAOStatData(){}
  ~SAOStatData(){}
  void reset()
  {
    ::memset(diff, 0, sizeof(int64_t)*MAX_NUM_SAO_CLASSES);
    ::memset(count, 0, sizeof(int64_t)*MAX_NUM_SAO_CLASSES);
  }
  const SAOStatData& operator=(const SAOStatData& src)
  {
    ::memcpy(diff, src.diff, sizeof(int64_t)*MAX_NUM_SAO_CLASSES);
    ::memcpy(count, src.count, sizeof(int64_t)*MAX_NUM_SAO_CLASSES);
    return *this;
  }
  const SAOStatData& operator+= (const SAOStatData& src)
  {
    for(int i=0; i< MAX_NUM_SAO_CLASSES; i++)
    {
      diff[i] += src.diff[i];
      count[i] += src.count[i];
    }
    return *this;
  }
};

class EncSampleAdaptiveOffset : public SampleAdaptiveOffset
{
public:
  EncSampleAdaptiveOffset();
  virtual ~EncSampleAdaptiveOffset();

  //interface
  void createEncData(bool isPreDBFSamplesUsed, uint32_t numCTUsPic);
  void destroyEncData();
  void initCABACEstimator( CABACEncoder* cabacEncoder, CtxCache* ctxCache, Slice* pcSlice );
  void SAOProcess( CodingStructure& cs, bool* sliceEnabled, const double* lambdas,
#if ENABLE_QPA
                   const double lambdaChromaWeight,
#endif
                   const bool bTestSAODisableAtPictureLevel, const double saoEncodingRate, const double saoEncodingRateChroma, const bool isPreDBFSamplesUsed, bool isGreedyMergeEncoding );

  void disabledRate( CodingStructure& cs, SAOBlkParam* reconParams, const double saoEncodingRate, const double saoEncodingRateChroma );
  void getPreDBFStatistics(CodingStructure& cs);
private: //methods

  void deriveLoopFilterBoundaryAvailibility(CodingStructure& cs, const Position &pos, bool& isLeftAvail, bool& isAboveAvail, bool& isAboveLeftAvail) const;
  void getStatistics(std::vector<SAOStatData**>& blkStats, PelUnitBuf& orgYuv, PelUnitBuf& srcYuv, CodingStructure& cs, bool isCalculatePreDeblockSamples = false);
  void decidePicParams(const Slice& slice, bool* sliceEnabled, const double saoEncodingRate, const double saoEncodingRateChroma);
  void decideBlkParams( CodingStructure& cs, bool* sliceEnabled, std::vector<SAOStatData**>& blkStats, PelUnitBuf& srcYuv, PelUnitBuf& resYuv, SAOBlkParam* reconParams, SAOBlkParam* codedParams, const bool bTestSAODisableAtPictureLevel,
#if ENABLE_QPA
                        const double chromaWeight,
#endif
                        const double saoEncodingRate, const double saoEncodingRateChroma, const bool isGreedymergeEncoding );
  void getBlkStats(const ComponentID compIdx, const int channelBitDepth, SAOStatData* statsDataTypes, Pel* srcBlk, Pel* orgBlk, int srcStride, int orgStride, int width, int height, bool isLeftAvail,  bool isRightAvail, bool isAboveAvail, bool isBelowAvail, bool isAboveLeftAvail, bool isAboveRightAvail, bool isCalculatePreDeblockSamples
                 , bool isCtuCrossedByVirtualBoundaries, int horVirBndryPos[], int verVirBndryPos[], int numHorVirBndry, int numVerVirBndry
    );
  void deriveModeNewRDO(const BitDepths &bitDepths, int ctuRsAddr, SAOBlkParam* mergeList[NUM_SAO_MERGE_TYPES], bool* sliceEnabled, std::vector<SAOStatData**>& blkStats, SAOBlkParam& modeParam, double& modeNormCost );
  void deriveModeMergeRDO(const BitDepths &bitDepths, int ctuRsAddr, SAOBlkParam* mergeList[NUM_SAO_MERGE_TYPES], bool* sliceEnabled, std::vector<SAOStatData**>& blkStats, SAOBlkParam& modeParam, double& modeNormCost );
  int64_t getDistortion(const int channelBitDepth, int typeIdc, int typeAuxInfo, int* offsetVal, SAOStatData& statData);
  void deriveOffsets(ComponentID compIdx, const int channelBitDepth, int typeIdc, SAOStatData& statData, int* quantOffsets, int& typeAuxInfo);
  inline int64_t estSaoDist(int64_t count, int64_t offset, int64_t diffSum, int shift);
  inline int estIterOffset(int typeIdx, double lambda, int offsetInput, int64_t count, int64_t diffSum, int shift, int bitIncrease, int64_t& bestDist, double& bestCost, int offsetTh );
  void addPreDBFStatistics(std::vector<SAOStatData**>& blkStats);
private: //members
  //for RDO
  CABACWriter*           m_CABACEstimator;
  CtxCache*              m_CtxCache;
  double                 m_lambda[MAX_NUM_COMPONENT];

  //statistics
  std::vector<SAOStatData**>         m_statData; //[ctu][comp][classes]
  std::vector<SAOStatData**>         m_preDBFstatData;
  double                 m_saoDisabledRate[MAX_NUM_COMPONENT][MAX_TLAYER];
  int                    m_skipLinesR[MAX_NUM_COMPONENT][NUM_SAO_NEW_TYPES];
  int                    m_skipLinesB[MAX_NUM_COMPONENT][NUM_SAO_NEW_TYPES];
};


//! \}

#endif