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 * and contributor rights, including patent rights, and no such rights are
 * granted under this license.  
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 * All rights reserved.
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/** \file     TDecEntropy.h
    \brief    entropy decoder class (header)
*/

#ifndef __TDECENTROPY__
#define __TDECENTROPY__

#include "TLibCommon/CommonDef.h"
#include "TLibCommon/TComBitStream.h"
#include "TLibCommon/TComSlice.h"
#include "TLibCommon/TComPic.h"
#include "TLibCommon/TComPrediction.h"
#include "TLibCommon/TComAdaptiveLoopFilter.h"
#include "TLibCommon/TComSampleAdaptiveOffset.h"

class TDecSbac;
class TDecCavlc;
class SEImessages;
class ParameterSetManagerDecoder;

//! \ingroup TLibDecoder
//! \{

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

/// entropy decoder pure class
class TDecEntropyIf
{
public:
  //  Virtual list for SBAC/CAVLC
  virtual Void  resetEntropy          ( TComSlice* pcSlice )     = 0;
  virtual Void  setBitstream          ( TComInputBitstream* p )  = 0;

  virtual Void  decodeFlush()                                                                      = 0;
  virtual Void  parseVPS                  ( TComVPS* pcVPS )                       = 0;
  virtual Void  parseSPS                  ( TComSPS* pcSPS )                                      = 0;
  virtual Void  parsePPS                  ( TComPPS* pcPPS )                                      = 0;
#if !REMOVE_APS
  virtual Void  parseAPS                  ( TComAPS* pAPS  )                                      = 0;
#endif

  virtual Void parseSliceHeader          ( TComSlice*& rpcSlice, ParameterSetManagerDecoder *parameterSetManager)       = 0;

  virtual Void  parseTerminatingBit       ( UInt& ruilsLast )                                     = 0;
  
  virtual Void parseMVPIdx        ( Int& riMVPIdx ) = 0;
  
public:
  virtual Void parseSkipFlag      ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth ) = 0;
  virtual Void parseCUTransquantBypassFlag( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth ) = 0;
  virtual Void parseSplitFlag     ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth ) = 0;
  virtual Void parseMergeFlag     ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth, UInt uiPUIdx ) = 0;
  virtual Void parseMergeIndex    ( TComDataCU* pcCU, UInt& ruiMergeIndex, UInt uiAbsPartIdx, UInt uiDepth ) = 0;
  virtual Void parsePartSize      ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth ) = 0;
  virtual Void parsePredMode      ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth ) = 0;
  
  virtual Void parseIntraDirLumaAng( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth ) = 0;
  
  virtual Void parseIntraDirChroma( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth ) = 0;
  
  virtual Void parseInterDir      ( TComDataCU* pcCU, UInt& ruiInterDir, UInt uiAbsPartIdx, UInt uiDepth ) = 0;
  virtual Void parseRefFrmIdx     ( TComDataCU* pcCU, Int& riRefFrmIdx, UInt uiAbsPartIdx, UInt uiDepth, RefPicList eRefList ) = 0;
  virtual Void parseMvd           ( TComDataCU* pcCU, UInt uiAbsPartAddr, UInt uiPartIdx, UInt uiDepth, RefPicList eRefList ) = 0;
  
  virtual Void parseTransformSubdivFlag( UInt& ruiSubdivFlag, UInt uiLog2TransformBlockSize ) = 0;
  virtual Void parseQtCbf         ( TComDataCU* pcCU, UInt uiAbsPartIdx, TextType eType, UInt uiTrDepth, UInt uiDepth ) = 0;
  virtual Void parseQtRootCbf     ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth, UInt& uiQtRootCbf ) = 0;
  
  virtual Void parseDeltaQP       ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth ) = 0;
  
  virtual Void parseIPCMInfo     ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth) = 0;

  virtual Void parseCoeffNxN( TComDataCU* pcCU, TCoeff* pcCoef, UInt uiAbsPartIdx, UInt uiWidth, UInt uiHeight, UInt uiDepth, TextType eTType ) = 0;
  virtual Void parseTransformSkipFlags ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt width, UInt height, UInt uiDepth, TextType eTType) = 0;

#if INTRA_BL
  virtual Void parseIntraBLFlag   ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiPartIdx, UInt uiDepth ) = 0;
#endif
#if !REMOVE_FGS
  /// set slice granularity
  virtual Void setSliceGranularity(Int iSliceGranularity) = 0;

  /// get slice granularity
  virtual Int  getSliceGranularity()                      = 0;
#endif
  virtual Void updateContextTables( SliceType eSliceType, Int iQp ) = 0;
  
  virtual ~TDecEntropyIf() {}
};

/// entropy decoder class
class TDecEntropy
{
private:
  TDecEntropyIf*  m_pcEntropyDecoderIf;
  TComPrediction* m_pcPrediction;
  UInt    m_uiBakAbsPartIdx;
  UInt    m_uiBakChromaOffset;
  UInt    m_bakAbsPartIdxCU;
  
public:
  Void init (TComPrediction* p) {m_pcPrediction = p;}
  Void decodePUWise       ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth, TComDataCU* pcSubCU );
  Void decodeInterDirPU   ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth, UInt uiPartIdx );
  Void decodeRefFrmIdxPU  ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth, UInt uiPartIdx, RefPicList eRefList );
  Void decodeMvdPU        ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth, UInt uiPartIdx, RefPicList eRefList );
  Void decodeMVPIdxPU     ( TComDataCU* pcSubCU, UInt uiPartAddr, UInt uiDepth, UInt uiPartIdx, RefPicList eRefList );
  
  Void    setEntropyDecoder           ( TDecEntropyIf* p );
  Void    setBitstream                ( TComInputBitstream* p ) { m_pcEntropyDecoderIf->setBitstream(p);                    }
  Void    resetEntropy                ( TComSlice* p)           { m_pcEntropyDecoderIf->resetEntropy(p);                    }
  Void    decodeVPS                   ( TComVPS* pcVPS ) { m_pcEntropyDecoderIf->parseVPS(pcVPS); }
  Void    decodeSPS                   ( TComSPS* pcSPS     )    { m_pcEntropyDecoderIf->parseSPS(pcSPS);                    }
  Void    decodePPS                   ( TComPPS* pcPPS, ParameterSetManagerDecoder *parameterSet    )    { m_pcEntropyDecoderIf->parsePPS(pcPPS);                    }
#if !REMOVE_APS
  Void    decodeAPS                   ( TComAPS* pAPS      )    { m_pcEntropyDecoderIf->parseAPS(pAPS);}
#endif
  Void    decodeSliceHeader           ( TComSlice*& rpcSlice, ParameterSetManagerDecoder *parameterSetManager)  { m_pcEntropyDecoderIf->parseSliceHeader(rpcSlice, parameterSetManager);         }

  Void    decodeTerminatingBit        ( UInt& ruiIsLast )       { m_pcEntropyDecoderIf->parseTerminatingBit(ruiIsLast);     }
  
  TDecEntropyIf* getEntropyDecoder() { return m_pcEntropyDecoderIf; }
  
public:
  Void decodeSplitFlag         ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth );
  Void decodeSkipFlag          ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth );
  Void decodeCUTransquantBypassFlag( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth );
  Void decodeMergeFlag         ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth, UInt uiPUIdx );
  Void decodeMergeIndex        ( TComDataCU* pcSubCU, UInt uiPartIdx, UInt uiPartAddr, PartSize eCUMode, UChar* puhInterDirNeighbours, TComMvField* pcMvFieldNeighbours, UInt uiDepth );
  Void decodePredMode          ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth );
  Void decodePartSize          ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth );
  
  Void decodeIPCMInfo          ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth );

  Void decodePredInfo          ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth, TComDataCU* pcSubCU );
  
  Void decodeIntraDirModeLuma  ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth );
  Void decodeIntraDirModeChroma( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth );
  
  Void decodeQP                ( TComDataCU* pcCU, UInt uiAbsPartIdx );
  
  Void updateContextTables    ( SliceType eSliceType, Int iQp ) { m_pcEntropyDecoderIf->updateContextTables( eSliceType, iQp ); }
  
#if INTRA_BL
  Void decodeIntraBLFlag       ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiPartIdx, UInt uiDepth );
#endif
  
private:
  Void xDecodeTransform        ( TComDataCU* pcCU, UInt offsetLuma, UInt offsetChroma, UInt uiAbsPartIdx, UInt absTUPartIdx, UInt uiDepth, UInt width, UInt height, UInt uiTrIdx, UInt uiInnerQuadIdx, Bool& bCodeDQP );

public:
  Void decodeCoeff             ( TComDataCU* pcCU                 , UInt uiAbsPartIdx, UInt uiDepth, UInt uiWidth, UInt uiHeight, Bool& bCodeDQP );
  
#if !REMOVE_FGS
  /// set slice granularity
  Void setSliceGranularity (Int iSliceGranularity) {m_pcEntropyDecoderIf->setSliceGranularity(iSliceGranularity);}
#endif
  
  Void decodeFlush() { m_pcEntropyDecoderIf->decodeFlush(); }

};// END CLASS DEFINITION TDecEntropy

//! \}

#endif // __TDECENTROPY__

