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 * granted under this license.
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 * Copyright (c) 2010-2015, ITU/ISO/IEC
 * All rights reserved.
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/** \file     TDecSbac.h
    \brief    SBAC decoder class (header)
*/

#ifndef __TDECSBAC__
#define __TDECSBAC__


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


#include "TDecEntropy.h"
#include "TDecBinCoder.h"
#include "TLibCommon/ContextTables.h"
#include "TLibCommon/ContextModel.h"
#include "TLibCommon/ContextModel3DBuffer.h"

//! \ingroup TLibDecoder
//! \{

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

class SEImessages;

/// SBAC decoder class
class TDecSbac : public TDecEntropyIf
{
public:
  TDecSbac();
  virtual ~TDecSbac();

  Void  init                      ( TDecBinIf* p )    { m_pcTDecBinIf = p; }
  Void  uninit                    (              )    { m_pcTDecBinIf = 0; }

  Void load                       ( const TDecSbac* pSrc );
  Void loadContexts               ( const TDecSbac* pSrc );
  Void xCopyFrom                  ( const TDecSbac* pSrc );
  Void xCopyContextsFrom          ( const TDecSbac* pSrc );

  Void  resetEntropy (TComSlice* pSlice );
  Void  setBitstream              ( TComInputBitstream* p  ) { m_pcBitstream = p; m_pcTDecBinIf->init( p ); }
  Void  parseVPS                  ( TComVPS* /*pcVPS*/ ) {}
  Void  parseSPS                  ( TComSPS* /*pcSPS*/ ) {}
#if CGS_3D_ASYMLUT
  Void  parsePPS                  ( TComPPS* /*pcPPS*/, TCom3DAsymLUT * /*pc3DAsymLUT*/, Int /*nLayerID*/ ) {}
#else
  Void  parsePPS                  ( TComPPS* /*pcPPS*/ ) {}
#endif

  Void  parseSliceHeader          ( TComSlice* /*pcSlice*/, ParameterSetManager* /*parameterSetManager*/, const Int /*prevTid0POC*/) {}
  Void  parseTerminatingBit       ( UInt& ruiBit );
  Void  parseRemainingBytes       ( Bool noTrailingBytesExpected);
  Void  parseMVPIdx               ( Int& riMVPIdx          );
  Void  parseSaoMaxUvlc           ( UInt& val, UInt maxSymbol );
  Void  parseSaoMerge             ( UInt&  ruiVal   );
  Void  parseSaoTypeIdx           ( UInt&  ruiVal  );
  Void  parseSaoUflc              ( UInt uiLength, UInt& ruiVal     );
  Void parseSAOBlkParam           (SAOBlkParam& saoBlkParam, Bool* sliceEnabled, Bool leftMergeAvail, Bool aboveMergeAvail, const BitDepths &bitDepths);
  Void parseSaoSign               (UInt& val);

private:
#if RExt__DECODER_DEBUG_BIT_STATISTICS
  Void  xReadUnarySymbol    ( UInt& ruiSymbol, ContextModel* pcSCModel, Int iOffset, const class TComCodingStatisticsClassType &whichStat );
  Void  xReadUnaryMaxSymbol ( UInt& ruiSymbol, ContextModel* pcSCModel, Int iOffset, UInt uiMaxSymbol, const class TComCodingStatisticsClassType &whichStat );
  Void  xReadEpExGolomb     ( UInt& ruiSymbol, UInt uiCount, const class TComCodingStatisticsClassType &whichStat );
  Void  xReadCoefRemainExGolomb ( UInt &rSymbol, UInt &rParam, const Bool useLimitedPrefixLength, const Int maxLog2TrDynamicRange, const class TComCodingStatisticsClassType &whichStat );
#else
  Void  xReadUnarySymbol    ( UInt& ruiSymbol, ContextModel* pcSCModel, Int iOffset );
  Void  xReadUnaryMaxSymbol ( UInt& ruiSymbol, ContextModel* pcSCModel, Int iOffset, UInt uiMaxSymbol );
  Void  xReadEpExGolomb     ( UInt& ruiSymbol, UInt uiCount );
  Void  xReadCoefRemainExGolomb ( UInt &rSymbol, UInt &rParam, const Bool useLimitedPrefixLength, const Int maxLog2TrDynamicRange );
#endif
private:
  TComInputBitstream* m_pcBitstream;
  TDecBinIf*        m_pcTDecBinIf;

public:

  Void parseSkipFlag      ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth );
  Void parseCUTransquantBypassFlag( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth );
  Void parseSplitFlag     ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth );
  Void parseMergeFlag     ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth, UInt uiPUIdx );
  Void parseMergeIndex    ( TComDataCU* pcCU, UInt& ruiMergeIndex );
  Void parsePartSize      ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth );
  Void parsePredMode      ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth );

  Void parseIntraDirLumaAng( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth );
  Void parseIntraDirChroma( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth );

  Void parseInterDir      ( TComDataCU* pcCU, UInt& ruiInterDir, UInt uiAbsPartIdx );
  Void parseRefFrmIdx     ( TComDataCU* pcCU, Int& riRefFrmIdx, RefPicList eRefList );
  Void parseMvd           ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiPartIdx, UInt uiDepth, RefPicList eRefList );

  Void parseCrossComponentPrediction ( class TComTU &rTu, ComponentID compID );

  Void parseTransformSubdivFlag( UInt& ruiSubdivFlag, UInt uiLog2TransformBlockSize );
  Void parseQtCbf         ( TComTU &rTu, const ComponentID compID, const Bool lowestLevel );
  Void parseQtRootCbf     ( UInt uiAbsPartIdx, UInt& uiQtRootCbf );

  Void parseDeltaQP       ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth );
  Void parseChromaQpAdjustment( TComDataCU* cu, UInt absPartIdx, UInt depth );

  Void parseIPCMInfo      ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth);

  Void parseLastSignificantXY( UInt& uiPosLastX, UInt& uiPosLastY, Int width, Int height, ComponentID component, UInt uiScanIdx );
  Void parseCoeffNxN      ( class TComTU &rTu, ComponentID compID  );
  Void parseTransformSkipFlags ( class TComTU &rTu, ComponentID component );

  Void  parseScalingList ( TComScalingList* /*scalingList*/ ) {}

  Void  parseExplicitRdpcmMode( TComTU &rTu, ComponentID compID );

private:
  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_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_cSaoMergeSCModel;
  ContextModel3DBuffer m_cSaoTypeIdxSCModel;
  ContextModel3DBuffer m_cTransformSkipSCModel;
  ContextModel3DBuffer m_CUTransquantBypassFlagSCModel;
  ContextModel3DBuffer m_explicitRdpcmFlagSCModel;
  ContextModel3DBuffer m_explicitRdpcmDirSCModel;
  ContextModel3DBuffer m_cCrossComponentPredictionSCModel;

  ContextModel3DBuffer m_ChromaQpAdjFlagSCModel;
  ContextModel3DBuffer m_ChromaQpAdjIdcSCModel;

  UInt m_golombRiceAdaptationStatistics[RExt__GOLOMB_RICE_ADAPTATION_STATISTICS_SETS];
};

//! \}

#endif // !defined(AFX_TDECSBAC_H__CFCAAA19_8110_47F4_9A16_810C4B5499D5__INCLUDED_)