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/** \file     TComSampleAdaptiveOffset.h
    \brief    sample adaptive offset class (header)
*/

#ifndef __TCOMSAMPLEADAPTIVEOFFSET__
#define __TCOMSAMPLEADAPTIVEOFFSET__

#include "CommonDef.h"
#include "TComPic.h"

//! \ingroup TLibCommon
//! \{


// ====================================================================================================================
// Constants
// ====================================================================================================================

#define MAX_SAO_TRUNCATED_BITDEPTH     10

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

template <typename T> Int sgn(T val)
{
  return (T(0) < val) - (val < T(0));
}

class TComSampleAdaptiveOffset
{
public:
  TComSampleAdaptiveOffset();
  virtual ~TComSampleAdaptiveOffset();
  Void SAOProcess(TComPic* pDecPic);
  Void create( Int picWidth, Int picHeight, ChromaFormat format, UInt maxCUWidth, UInt maxCUHeight, UInt maxCUDepth, UInt lumaBitShift, UInt chromaBitShift );
  Void destroy();
  Void reconstructBlkSAOParams(TComPic* pic, SAOBlkParam* saoBlkParams);
  Void PCMLFDisableProcess (TComPic* pcPic);
  static Int getMaxOffsetQVal(const Int channelBitDepth) { return (1<<(std::min<Int>(channelBitDepth,MAX_SAO_TRUNCATED_BITDEPTH)-5))-1; } //Table 9-32, inclusive

protected:
  Void offsetBlock(const Int channelBitDepth, Int typeIdx, Int* offset, Pel* srcBlk, Pel* resBlk, Int srcStride, Int resStride,  Int width, Int height
                  , Bool isLeftAvail, Bool isRightAvail, Bool isAboveAvail, Bool isBelowAvail, Bool isAboveLeftAvail, Bool isAboveRightAvail, Bool isBelowLeftAvail, Bool isBelowRightAvail);
  Void invertQuantOffsets(ComponentID compIdx, Int typeIdc, Int typeAuxInfo, Int* dstOffsets, Int* srcOffsets);
  Void reconstructBlkSAOParam(SAOBlkParam& recParam, SAOBlkParam* mergeList[NUM_SAO_MERGE_TYPES]);
  Int  getMergeList(TComPic* pic, Int ctuRsAddr, SAOBlkParam* blkParams, SAOBlkParam* mergeList[NUM_SAO_MERGE_TYPES]);
  Void offsetCTU(Int ctuRsAddr, TComPicYuv* srcYuv, TComPicYuv* resYuv, SAOBlkParam& saoblkParam, TComPic* pPic);
  Void xPCMRestoration(TComPic* pcPic);
  Void xPCMCURestoration ( TComDataCU* pcCU, UInt uiAbsZorderIdx, UInt uiDepth );
  Void xPCMSampleRestoration (TComDataCU* pcCU, UInt uiAbsZorderIdx, UInt uiDepth, const ComponentID compID);
protected:
  UInt m_offsetStepLog2[MAX_NUM_COMPONENT]; //offset step
  TComPicYuv*   m_tempPicYuv; //temporary buffer
  Int m_picWidth;
  Int m_picHeight;
  Int m_maxCUWidth;
  Int m_maxCUHeight;
  Int m_numCTUInWidth;
  Int m_numCTUInHeight;
  Int m_numCTUsPic;


  Int m_lineBufWidth;
  Char* m_signLineBuf1;
  Char* m_signLineBuf2;
  ChromaFormat m_chromaFormatIDC;
private:
  Bool m_picSAOEnabled[MAX_NUM_COMPONENT];
};

//! \}
#endif