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 * granted under this license.  
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 * Copyright (c) 2010-2012, ITU/ISO/IEC
 * All rights reserved.
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/** \file     TEncSbac.h
    \brief    Context-adaptive entropy encoder class (header)
*/

#ifndef __TENCSBAC__
#define __TENCSBAC__

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

#include "TLibCommon/TComBitStream.h"
#include "TLibCommon/ContextTables.h"
#include "TLibCommon/ContextModel.h"
#include "TLibCommon/ContextModel3DBuffer.h"
#include "TEncEntropy.h"
#include "TEncBinCoder.h"
#include "TEncBinCoderCABAC.h"
#if FAST_BIT_EST
#include "TEncBinCoderCABACCounter.h"
#endif

class TEncTop;

//! \ingroup TLibEncoder
//! \{

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

/// SBAC encoder class
class TEncSbac : public TEncEntropyIf
{
public:
  TEncSbac();
  virtual ~TEncSbac();
  
  Void  init                   ( TEncBinIf* p )  { m_pcBinIf = p; }
  Void  uninit                 ()                { m_pcBinIf = 0; }

  //  Virtual list
  Void  resetEntropy           ();
  Void  determineCabacInitIdx  ();
  Void  setBitstream           ( TComBitIf* p )  { m_pcBitIf = p; m_pcBinIf->init( p ); }
  Void  setSlice               ( TComSlice* p )  { m_pcSlice = p;                       }
  // SBAC RD
  Void  resetCoeffCost         ()                { m_uiCoeffCost = 0;  }
  UInt  getCoeffCost           ()                { return  m_uiCoeffCost;  }
  
  Void  load                   ( TEncSbac* pScr  );
  Void  loadIntraDirModeLuma   ( TEncSbac* pScr  );
  Void  store                  ( TEncSbac* pDest );
  Void  loadContexts           ( TEncSbac* pScr  );
  Void  resetBits              ()                { m_pcBinIf->resetBits(); m_pcBitIf->resetBits(); }
  UInt  getNumberOfWrittenBits ()                { return m_pcBinIf->getNumWrittenBits(); }
  //--SBAC RD

  Void  codeVPS                 ( TComVPS* pcVPS );
  Void  codeSPS                 ( TComSPS* pcSPS     );
  Void  codePPS                 ( TComPPS* pcPPS     );
  Void  codeSliceHeader         ( TComSlice* pcSlice );
  Void  codeTilesWPPEntryPoint( TComSlice* pSlice );
  Void  codeTerminatingBit      ( UInt uilsLast      );
  Void  codeSliceFinish         ();
  Void  codeFlush               ();
  Void  encodeStart             ();
#if !REMOVE_ALF
  Void codeAlfParam(ALFParam* alfParam){printf("Not supported\n"); assert(0); exit(1);}
  Void codeAlfCtrlFlag( Int compIdx, UInt code );
#endif
  Void  codeApsExtensionFlag () { assert (0); return; };
  Void  codeSaoMaxUvlc    ( UInt code, UInt maxSymbol );
#if SAO_MERGE_ONE_CTX
  Void  codeSaoMerge  ( UInt  uiCode );
#else
  Void  codeSaoMergeLeft  ( UInt  uiCode, UInt uiCompIdx );
  Void  codeSaoMergeUp    ( UInt  uiCode);
#endif
  Void  codeSaoTypeIdx    ( UInt  uiCode);
#if SAO_TYPE_CODING
  Void  codeSaoUflc       ( UInt uiLength, UInt  uiCode );
#else
  Void  codeSaoUflc       ( UInt  uiCode);
#endif
  Void  codeSAOSign       ( UInt  uiCode);  //<! code SAO offset sign
  Void  codeScalingList      ( TComScalingList* scalingList     ){ assert (0);  return;};

private:
  Void  xWriteUnarySymbol    ( UInt uiSymbol, ContextModel* pcSCModel, Int iOffset );
  Void  xWriteUnaryMaxSymbol ( UInt uiSymbol, ContextModel* pcSCModel, Int iOffset, UInt uiMaxSymbol );
  Void  xWriteEpExGolomb     ( UInt uiSymbol, UInt uiCount );
  Void  xWriteCoefRemainExGolomb ( UInt symbol, UInt &rParam );
  Void  xWriteTerminatingBit ( UInt uiBit );
  
  Void  xCopyFrom            ( TEncSbac* pSrc );
  Void  xCopyContextsFrom    ( TEncSbac* pSrc );  
  
#if !REMOVE_APS
  Void codeAPSInitInfo(TComAPS* pcAPS) {printf("Not supported in codeAPSInitInfo()\n"); assert(0); exit(1);}
#endif
  Void codeFinish     (Bool bEnd)      { m_pcBinIf->encodeFlush(bEnd); }  //<! flush bits when CABAC termination
  Void codeDFFlag( UInt uiCode, const Char *pSymbolName )       {printf("Not supported in codeDFFlag()\n"); assert(0); exit(1);};
  Void codeDFSvlc( Int iCode, const Char *pSymbolName )         {printf("Not supported in codeDFSvlc()\n"); assert(0); exit(1);};

protected:
  TComBitIf*    m_pcBitIf;
  TComSlice*    m_pcSlice;
  TEncBinIf*    m_pcBinIf;
  //SBAC RD
  UInt          m_uiCoeffCost;

#if !REMOVE_FGS
  Int           m_iSliceGranularity; //!< slice granularity
#endif
  //--Adaptive loop filter
  
public:
#if !REMOVE_FGS
  /// set slice granularity
  Void setSliceGranularity(Int iSliceGranularity)  {m_iSliceGranularity = iSliceGranularity;}

  /// get slice granularity
  Int  getSliceGranularity()                       {return m_iSliceGranularity;             }
#endif
  Void codeCUTransquantBypassFlag( TComDataCU* pcCU, UInt uiAbsPartIdx );
  Void codeSkipFlag      ( TComDataCU* pcCU, UInt uiAbsPartIdx );
  Void codeMergeFlag     ( TComDataCU* pcCU, UInt uiAbsPartIdx );
  Void codeMergeIndex    ( TComDataCU* pcCU, UInt uiAbsPartIdx );
  Void codeSplitFlag     ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth );
  Void codeMVPIdx        ( TComDataCU* pcCU, UInt uiAbsPartIdx, RefPicList eRefList );
  
#if INTRA_BL
  Void codeIntraBLFlag      ( TComDataCU* pcCU, UInt uiAbsPartIdx );
#endif
  Void codePartSize      ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth );
  Void codePredMode      ( TComDataCU* pcCU, UInt uiAbsPartIdx );
  Void codeIPCMInfo      ( TComDataCU* pcCU, UInt uiAbsPartIdx, Int numIPCM, Bool firstIPCMFlag);
  Void codeTransformSubdivFlag ( UInt uiSymbol, UInt uiCtx );
  Void codeQtCbf               ( TComDataCU* pcCU, UInt uiAbsPartIdx, TextType eType, UInt uiTrDepth );
  Void codeQtRootCbf           ( TComDataCU* pcCU, UInt uiAbsPartIdx );
#if TU_ZERO_CBF_RDO
  Void codeQtCbfZero           ( TComDataCU* pcCU, UInt uiAbsPartIdx, TextType eType, UInt uiTrDepth );
  Void codeQtRootCbfZero       ( TComDataCU* pcCU, UInt uiAbsPartIdx );
#endif
  Void codeIntraDirLumaAng     ( TComDataCU* pcCU, UInt absPartIdx, Bool isMultiple);
  
  Void codeIntraDirChroma      ( TComDataCU* pcCU, UInt uiAbsPartIdx );
  Void codeInterDir            ( TComDataCU* pcCU, UInt uiAbsPartIdx );
  Void codeRefFrmIdx           ( TComDataCU* pcCU, UInt uiAbsPartIdx, RefPicList eRefList );
  Void codeMvd                 ( TComDataCU* pcCU, UInt uiAbsPartIdx, RefPicList eRefList );
  
  Void codeDeltaQP             ( TComDataCU* pcCU, UInt uiAbsPartIdx );
  
  Void codeLastSignificantXY ( UInt uiPosX, UInt uiPosY, Int width, Int height, TextType eTType, UInt uiScanIdx );
  Void codeCoeffNxN            ( TComDataCU* pcCU, TCoeff* pcCoef, UInt uiAbsPartIdx, UInt uiWidth, UInt uiHeight, UInt uiDepth, TextType eTType );
  void codeTransformSkipFlags ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt width, UInt height, UInt uiDepth, TextType eTType );

  // -------------------------------------------------------------------------------------------------------------------
  // for RD-optimizatioon
  // -------------------------------------------------------------------------------------------------------------------
  
  Void estBit               (estBitsSbacStruct* pcEstBitsSbac, Int width, Int height, TextType eTType);
  Void estCBFBit                     ( estBitsSbacStruct* pcEstBitsSbac, UInt uiCTXIdx, TextType eTType );
  Void estSignificantCoeffGroupMapBit( estBitsSbacStruct* pcEstBitsSbac, UInt uiCTXIdx, TextType eTType );
  Void estSignificantMapBit          ( estBitsSbacStruct* pcEstBitsSbac, Int width, Int height, TextType eTType );
  Void estSignificantCoefficientsBit ( estBitsSbacStruct* pcEstBitsSbac, UInt uiCTXIdx, TextType eTType );
  
  Void updateContextTables           ( SliceType eSliceType, Int iQp, Bool bExecuteFinish=true  );
  Void updateContextTables           ( SliceType eSliceType, Int iQp  ) { this->updateContextTables( eSliceType, iQp, true); };
  
  TEncBinIf* getEncBinIf()  { return m_pcBinIf; }
private:
  UInt                 m_uiLastQp;
  
  ContextModel         m_contextModels[MAX_NUM_CTX_MOD];
  Int                  m_numContextModels;
  ContextModel3DBuffer m_cCUSplitFlagSCModel;
  ContextModel3DBuffer m_cCUSkipFlagSCModel;
  ContextModel3DBuffer m_cCUMergeFlagExtSCModel;
  ContextModel3DBuffer m_cCUMergeIdxExtSCModel;
  ContextModel3DBuffer m_cCUPartSizeSCModel;
  ContextModel3DBuffer m_cCUPredModeSCModel;
  ContextModel3DBuffer m_cCUAlfCtrlFlagSCModel;
  ContextModel3DBuffer m_cCUIntraPredSCModel;
  ContextModel3DBuffer m_cCUChromaPredSCModel;
  ContextModel3DBuffer m_cCUDeltaQpSCModel;
  ContextModel3DBuffer m_cCUInterDirSCModel;
  ContextModel3DBuffer m_cCURefPicSCModel;
  ContextModel3DBuffer m_cCUMvdSCModel;
  ContextModel3DBuffer m_cCUQtCbfSCModel;
  ContextModel3DBuffer m_cCUTransSubdivFlagSCModel;
  ContextModel3DBuffer m_cCUQtRootCbfSCModel;
  
  ContextModel3DBuffer m_cCUSigCoeffGroupSCModel;
  ContextModel3DBuffer m_cCUSigSCModel;
  ContextModel3DBuffer m_cCuCtxLastX;
  ContextModel3DBuffer m_cCuCtxLastY;
  ContextModel3DBuffer m_cCUOneSCModel;
  ContextModel3DBuffer m_cCUAbsSCModel;
  
  ContextModel3DBuffer m_cMVPIdxSCModel;
  
  ContextModel3DBuffer m_cALFFlagSCModel;
  ContextModel3DBuffer m_cALFUvlcSCModel;
  ContextModel3DBuffer m_cALFSvlcSCModel;
  ContextModel3DBuffer m_cCUAMPSCModel;
#if !SAO_ABS_BY_PASS
  ContextModel3DBuffer m_cSaoUvlcSCModel;
#endif
#if SAO_MERGE_ONE_CTX
  ContextModel3DBuffer m_cSaoMergeSCModel;
#else
  ContextModel3DBuffer m_cSaoMergeLeftSCModel;
  ContextModel3DBuffer m_cSaoMergeUpSCModel;
#endif
#if INTRA_BL
  ContextModel3DBuffer m_cIntraBLPredFlagSCModel;
#endif
  ContextModel3DBuffer m_cSaoTypeIdxSCModel;
  ContextModel3DBuffer m_cTransformSkipSCModel;
  ContextModel3DBuffer m_CUTransquantBypassFlagSCModel;
};

//! \}

#endif // !defined(AFX_TENCSBAC_H__DDA7CDC4_EDE3_4015_9D32_2156249C82AA__INCLUDED_)