source: 3DVCSoftware/branches/HTM-3.0-Qualcomm/source/Lib/TLibDecoder/TDecBinCoderCABAC.h

Last change on this file was 56, checked in by hschwarz, 12 years ago

updated trunk (move to HM6.1)

  • Property svn:eol-style set to native
File size: 3.2 KB
Line 
1/* The copyright in this software is being made available under the BSD
2 * License, included below. This software may be subject to other third party
3 * and contributor rights, including patent rights, and no such rights are
4 * granted under this license. 
5 *
6 * Copyright (c) 2010-2012, ITU/ISO/IEC
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions are met:
11 *
12 *  * Redistributions of source code must retain the above copyright notice,
13 *    this list of conditions and the following disclaimer.
14 *  * Redistributions in binary form must reproduce the above copyright notice,
15 *    this list of conditions and the following disclaimer in the documentation
16 *    and/or other materials provided with the distribution.
17 *  * Neither the name of the ITU/ISO/IEC nor the names of its contributors may
18 *    be used to endorse or promote products derived from this software without
19 *    specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
31 * THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34/** \file     TDecBinCoderCABAC.h
35    \brief    binary entropy decoder of CABAC
36*/
37
38#ifndef __TDEC_BIN_CODER_CABAC__
39#define __TDEC_BIN_CODER_CABAC__
40
41#include "TLibCommon/TComCABACTables.h"
42#include "TDecBinCoder.h"
43
44//! \ingroup TLibDecoder
45//! \{
46
47class TDecBinCABAC : public TDecBinIf
48{
49public:
50  TDecBinCABAC ();
51  virtual ~TDecBinCABAC();
52 
53  Void  init              ( TComInputBitstream* pcTComBitstream );
54  Void  uninit            ();
55 
56  Void  start             ();
57  Void  finish            ();
58#if OL_FLUSH
59  Void  flush             ();
60#endif
61 
62  Void  decodeBin         ( UInt& ruiBin, ContextModel& rcCtxModel );
63  Void  decodeBinEP       ( UInt& ruiBin                           );
64  Void  decodeBinsEP      ( UInt& ruiBin, Int numBins              );
65  Void  decodeBinTrm      ( UInt& ruiBin                           );
66 
67  Void  resetBac          ();
68#if BURST_IPCM
69  Void  decodeNumSubseqIPCM( Int& numSubseqIPCM ) ;
70#endif
71  Void  decodePCMAlignBits();
72  Void  xReadPCMCode      ( UInt uiLength, UInt& ruiCode );
73 
74  Void  copyState         ( TDecBinIf* pcTDecBinIf );
75  TDecBinCABAC* getTDecBinCABAC()  { return this; }
76#if !OL_FLUSH_ALIGN
77  Int   getBitsReadAhead() { return -m_bitsNeeded; }
78#endif
79
80private:
81  TComInputBitstream* m_pcTComBitstream;
82  UInt                m_uiRange;
83  UInt                m_uiValue;
84#if OL_FLUSH && !OL_FLUSH_ALIGN
85  UInt                m_uiLastByte;
86#endif
87  Int                 m_bitsNeeded;
88};
89
90//! \}
91
92#endif
93
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