TDecBinCoderCABAC.h 3.6 KB
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/* The copyright in this software is being made available under the BSD
 * License, included below. This software may be subject to other third party
 * and contributor rights, including patent rights, and no such rights are
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 * granted under this license.
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 *
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 * Copyright (c) 2010-2020, ITU/ISO/IEC
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 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  * Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *  * Neither the name of the ITU/ISO/IEC nor the names of its contributors may
 *    be used to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */
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/** \file     TDecBinCoderCABAC.h
    \brief    binary entropy decoder of CABAC
*/

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#ifndef __TDECBINCODERCABAC__
#define __TDECBINCODERCABAC__
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#include "TLibCommon/TComCABACTables.h"
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#include "TDecBinCoder.h"

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//! \ingroup TLibDecoder
//! \{
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class TDecBinCABAC : public TDecBinIf
{
public:
  TDecBinCABAC ();
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  virtual ~TDecBinCABAC();
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  Void  init              ( TComInputBitstream* pcTComBitstream );
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  Void  uninit            ();
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  Void  start             ();
  Void  finish            ();
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#if RExt__DECODER_DEBUG_BIT_STATISTICS
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  Void  decodeBin          ( UInt& ruiBin, ContextModel& rcCtxModel, const class TComCodingStatisticsClassType &whichStat );
  Void  decodeBinEP        ( UInt& ruiBin                          , const class TComCodingStatisticsClassType &whichStat );
  Void  decodeBinsEP       ( UInt& ruiBin, Int numBins             , const class TComCodingStatisticsClassType &whichStat );
  Void  decodeAlignedBinsEP( UInt& ruiBins, Int numBins            , const class TComCodingStatisticsClassType &whichStat );
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#else
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  Void  decodeBin         ( UInt& ruiBin, ContextModel& rcCtxModel );
  Void  decodeBinEP       ( UInt& ruiBin                           );
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  Void  decodeBinsEP      ( UInt& ruiBin, Int numBins              );
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  Void  decodeAlignedBinsEP( UInt& ruiBins, Int numBins             );
#endif

  Void  align             ();
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  Void  decodeBinTrm      ( UInt& ruiBin                           );
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  Void  xReadPCMCode      ( UInt uiLength, UInt& ruiCode );
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  Void  copyState         ( const TDecBinIf* pcTDecBinIf );
  TDecBinCABAC* getTDecBinCABAC()             { return this; }
  const TDecBinCABAC* getTDecBinCABAC() const { return this; }
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private:
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  TComInputBitstream* m_pcTComBitstream;
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  UInt                m_uiRange;
  UInt                m_uiValue;
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  Int                 m_bitsNeeded;
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};

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//! \}
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#endif