source: 3DVCSoftware/trunk/source/Lib/TLibEncoder/TEncBinCoderCABACCounter.cpp @ 81

Last change on this file since 81 was 56, checked in by hschwarz, 12 years ago

updated trunk (move to HM6.1)

File size: 3.4 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     TEncBinCoderCABAC.cpp
35    \brief    binary entropy encoder of CABAC
36*/
37
38#include "TEncBinCoderCABACCounter.h"
39#include "TLibCommon/TComRom.h"
40
41#if FAST_BIT_EST
42
43//! \ingroup TLibEncoder
44//! \{
45
46
47TEncBinCABACCounter::TEncBinCABACCounter()
48{
49}
50
51TEncBinCABACCounter::~TEncBinCABACCounter()
52{
53}
54
55Void TEncBinCABACCounter::finish()
56{
57  m_pcTComBitIf->write(0, UInt(m_fracBits >> 15) );
58  m_fracBits &= 32767;
59}
60
61UInt TEncBinCABACCounter::getNumWrittenBits()
62{
63  return m_pcTComBitIf->getNumberOfWrittenBits() + UInt( m_fracBits >> 15 );
64}
65
66/**
67 * \brief Encode bin
68 *
69 * \param binValue   bin value
70 * \param rcCtxModel context model
71 */
72Void TEncBinCABACCounter::encodeBin( UInt binValue, ContextModel &rcCtxModel )
73{
74  m_uiBinsCoded += m_binCountIncrement;
75 
76  m_fracBits += rcCtxModel.getEntropyBits( binValue );
77  rcCtxModel.update( binValue );
78}
79
80/**
81 * \brief Encode equiprobable bin
82 *
83 * \param binValue bin value
84 */
85Void TEncBinCABACCounter::encodeBinEP( UInt binValue )
86{
87  m_uiBinsCoded += m_binCountIncrement;
88  m_fracBits += 32768;
89}
90
91/**
92 * \brief Encode equiprobable bins
93 *
94 * \param binValues bin values
95 * \param numBins number of bins
96 */
97Void TEncBinCABACCounter::encodeBinsEP( UInt binValues, Int numBins )
98{
99  m_uiBinsCoded += numBins & -m_binCountIncrement;
100  m_fracBits += 32768 * numBins;
101}
102
103/**
104 * \brief Encode terminating bin
105 *
106 * \param binValue bin value
107 */
108Void TEncBinCABACCounter::encodeBinTrm( UInt binValue )
109{
110  m_uiBinsCoded += m_binCountIncrement;
111  m_fracBits += ContextModel::getEntropyBitsTrm( binValue );
112}
113
114//! \}
115#endif
116
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