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

#ifndef __TENCSAMPLEADAPTIVEOFFSET__
#define __TENCSAMPLEADAPTIVEOFFSET__

#include "TLibCommon/TComSampleAdaptiveOffset.h"
#include "TLibCommon/TComPic.h"

#include "TEncEntropy.h"
#include "TEncSbac.h"
#include "TLibCommon/TComBitCounter.h"

//! \ingroup TLibEncoder
//! \{

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

enum SAOCabacStateLablesRDO //CABAC state labels
{
  SAO_CABACSTATE_PIC_INIT =0,
  SAO_CABACSTATE_BLK_CUR,
  SAO_CABACSTATE_BLK_NEXT,
  SAO_CABACSTATE_BLK_MID,
  SAO_CABACSTATE_BLK_TEMP,
  NUM_SAO_CABACSTATE_LABELS
};

struct SAOStatData //data structure for SAO statistics
{
  Int64 diff[MAX_NUM_SAO_CLASSES];
  Int64 count[MAX_NUM_SAO_CLASSES];

  SAOStatData(){}
  ~SAOStatData(){}
  Void reset()
  {
    ::memset(diff, 0, sizeof(Int64)*MAX_NUM_SAO_CLASSES);
    ::memset(count, 0, sizeof(Int64)*MAX_NUM_SAO_CLASSES);
  }
  const SAOStatData& operator=(const SAOStatData& src)
  {
    ::memcpy(diff, src.diff, sizeof(Int64)*MAX_NUM_SAO_CLASSES);
    ::memcpy(count, src.count, sizeof(Int64)*MAX_NUM_SAO_CLASSES);
    return *this;
  }
#if SAO_ENCODE_ALLOW_USE_PREDEBLOCK
  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;
  }
#endif
};

class TEncSampleAdaptiveOffset : public TComSampleAdaptiveOffset
{
public:
  TEncSampleAdaptiveOffset();
  virtual ~TEncSampleAdaptiveOffset();

  //interface
#if SAO_ENCODE_ALLOW_USE_PREDEBLOCK
  Void createEncData(Bool isPreDBFSamplesUsed);
#else
  Void createEncData();
#endif
  Void destroyEncData();
  Void initRDOCabacCoder(TEncSbac* pcRDGoOnSbacCoder, TComSlice* pcSlice) ;
  Void SAOProcess(TComPic* pPic, Bool* sliceEnabled, const Double *lambdas
#if SAO_ENCODE_ALLOW_USE_PREDEBLOCK
                , Bool isPreDBFSamplesUsed
#endif
                ); 
public: //methods
#if SAO_ENCODE_ALLOW_USE_PREDEBLOCK
  Void getPreDBFStatistics(TComPic* pPic); 
#endif
private: //methods
  Void getStatistics(SAOStatData*** blkStats, TComPicYuv* orgYuv, TComPicYuv* srcYuv,TComPic* pPic
#if SAO_ENCODE_ALLOW_USE_PREDEBLOCK
                   , Bool isCalculatePreDeblockSamples = false
#endif
                   );
  Void decidePicParams(Bool* sliceEnabled, Int picTempLayer);
  Void decideBlkParams(TComPic* pic, Bool* sliceEnabled, SAOStatData*** blkStats, TComPicYuv* srcYuv, TComPicYuv* resYuv, SAOBlkParam* reconParams, SAOBlkParam* codedParams);
  Void getBlkStats(Int compIdx, 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 isBelowLeftAvail, Bool isBelowRightAvail
#if SAO_ENCODE_ALLOW_USE_PREDEBLOCK
                  , Bool isCalculatePreDeblockSamples
#endif
                  );
  Void deriveModeNewRDO(Int ctu, std::vector<SAOBlkParam*>& mergeList, Bool* sliceEnabled, SAOStatData*** blkStats, SAOBlkParam& modeParam, Double& modeNormCost, TEncSbac** cabacCoderRDO, Int inCabacLabel);
  Void deriveModeMergeRDO(Int ctu, std::vector<SAOBlkParam*>& mergeList, Bool* sliceEnabled, SAOStatData*** blkStats, SAOBlkParam& modeParam, Double& modeNormCost, TEncSbac** cabacCoderRDO, Int inCabacLabel);
  Int64 getDistortion(Int ctu, Int compIdx, Int typeIdc, Int typeAuxInfo, Int* offsetVal, SAOStatData& statData);
  Void deriveOffsets(Int ctu, Int compIdx, Int typeIdc, SAOStatData& statData, Int* quantOffsets, Int& typeAuxInfo);
  inline Int64 estSaoDist(Int64 count, Int64 offset, Int64 diffSum, Int shift);
  inline Int estIterOffset(Int typeIdx, Int classIdx, Double lambda, Int offsetInput, Int64 count, Int64 diffSum, Int shift, Int bitIncrease, Int64& bestDist, Double& bestCost, Int offsetTh );
#if SAO_ENCODE_ALLOW_USE_PREDEBLOCK
  Void addPreDBFStatistics(SAOStatData*** blkStats);
#endif
private: //members
  //for RDO
  TEncSbac**             m_pppcRDSbacCoder;           
  TEncSbac*              m_pcRDGoOnSbacCoder;
  TEncBinCABACCounter**  m_pppcBinCoderCABAC;    
  Double                 m_lambda[NUM_SAO_COMPONENTS];

  //statistics
  SAOStatData***         m_statData; //[ctu][comp][classes]
#if SAO_ENCODE_ALLOW_USE_PREDEBLOCK
  SAOStatData***         m_preDBFstatData;
#endif
#if SAO_ENCODING_CHOICE
  Double                 m_saoDisabledRate[NUM_SAO_COMPONENTS][MAX_TLAYER];
#endif
  Int                    m_skipLinesR[NUM_SAO_COMPONENTS][NUM_SAO_NEW_TYPES];
  Int                    m_skipLinesB[NUM_SAO_COMPONENTS][NUM_SAO_NEW_TYPES];
};
//! \}

#endif
