source: 3DVCSoftware/branches/HTM-6.2-dev1-Samsung/Lib/TLibEncoder/NALwrite.cpp @ 347

Last change on this file since 347 was 347, checked in by samsung-htm, 11 years ago

D0122 Integration

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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
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS
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#include <vector>
35#include <algorithm>
36#include <ostream>
37
38#include "TLibCommon/NAL.h"
39#include "TLibCommon/TComBitStream.h"
40#include "NALwrite.h"
41
42using namespace std;
43
44//! \ingroup TLibEncoder
45//! \{
46
47static const char emulation_prevention_three_byte[] = {3};
48
49/**
50 * write nalu to bytestream out, performing RBSP anti startcode
51 * emulation as required.  nalu.m_RBSPayload must be byte aligned.
52 */
53void write(ostream& out, OutputNALUnit& nalu)
54{
55  TComOutputBitstream bsNALUHeader;
56
57  bsNALUHeader.write(0,1); // forbidden_zero_flag
58  bsNALUHeader.write(nalu.m_nalRefFlag? 1 : 0, 1); // nal_ref_flag
59  bsNALUHeader.write(nalu.m_nalUnitType, 6);          // nal_unit_type
60
61#if QC_MVHEVC_B0046
62  bsNALUHeader.write(nalu.m_layerId,        5); // when nal_ref_flag is signalled, 5 bits here. otherwise, 6 bits
63  bsNALUHeader.write(nalu.m_temporalId + 1, 3); // temporal_id
64#else
65#if VIDYO_VPS_INTEGRATION
66  bsNALUHeader.write(nalu.m_temporalId, 3); // temporal_id
67  bsNALUHeader.write(nalu.m_layerId + 1, 5); // layer_id_plus1
68#else
69  bsNALUHeader.write(nalu.m_temporalId, 3); // temporal_id
70 // bsNALUHeader.write(1, 5); // reserved_one_5bits
71  bsNALUHeader.write(nalu.m_viewId+1,4); 
72  bsNALUHeader.write(nalu.m_isDepth,1);
73#endif
74#endif
75  out.write(bsNALUHeader.getByteStream(), bsNALUHeader.getByteStreamLength());
76
77  /* write out rsbp_byte's, inserting any required
78   * emulation_prevention_three_byte's */
79  /* 7.4.1 ...
80   * emulation_prevention_three_byte is a byte equal to 0x03. When an
81   * emulation_prevention_three_byte is present in the NAL unit, it shall be
82   * discarded by the decoding process.
83   * The last byte of the NAL unit shall not be equal to 0x00.
84   * Within the NAL unit, the following three-byte sequences shall not occur at
85   * any byte-aligned position:
86   *  - 0x000000
87   *  - 0x000001
88   *  - 0x000002
89   * Within the NAL unit, any four-byte sequence that starts with 0x000003
90   * other than the following sequences shall not occur at any byte-aligned
91   * position:
92   *  - 0x00000300
93   *  - 0x00000301
94   *  - 0x00000302
95   *  - 0x00000303
96   */
97  vector<uint8_t>& rbsp   = nalu.m_Bitstream.getFIFO();
98  UInt uiTileMarkerCount  = nalu.m_Bitstream.getTileMarkerLocationCount();
99
100  for (vector<uint8_t>::iterator it = rbsp.begin(); it != rbsp.end();)
101  {
102    /* 1) find the next emulated 00 00 {00,01,02,03}
103     * 2a) if not found, write all remaining bytes out, stop.
104     * 2b) otherwise, write all non-emulated bytes out
105     * 3) insert emulation_prevention_three_byte
106     */
107    vector<uint8_t>::iterator found = it;
108    do
109    {
110      /* NB, end()-1, prevents finding a trailing two byte sequence */
111      found = search_n(found, rbsp.end()-1, 2, 0);
112      found++;
113      /* if not found, found == end, otherwise found = second zero byte */
114      if (found == rbsp.end())
115        break;
116      if (*(++found) <= 3)
117        break;
118    } while (true);
119
120    UInt uiDistance = (UInt)(found - rbsp.begin());
121    for ( UInt uiMrkrIdx = 0; uiMrkrIdx < uiTileMarkerCount ; uiMrkrIdx++ )
122    {   
123      UInt uiByteLocation   = nalu.m_Bitstream.getTileMarkerLocation( uiMrkrIdx );
124      if (found != rbsp.end() && uiByteLocation > (uiDistance - 2) )
125      {
126        nalu.m_Bitstream.setTileMarkerLocation( uiMrkrIdx, uiByteLocation+1 );
127      }
128    }
129    it = found;
130    if (found != rbsp.end())
131    {
132      it = rbsp.insert(found, emulation_prevention_three_byte[0]);
133    }
134  }
135
136  // Insert tile markers
137  TComOutputBitstream cTileMarker;
138  UInt uiMarker = 0x000002;
139  cTileMarker.write(uiMarker, 24);
140  for ( UInt uiInsertIdx   = 0; uiInsertIdx < uiTileMarkerCount ; uiInsertIdx++ )
141  {
142    UInt uiByteLocation   = nalu.m_Bitstream.getTileMarkerLocation( uiInsertIdx );
143    nalu.m_Bitstream.insertAt( cTileMarker, uiByteLocation ); // 0x000002
144
145    // update tile marker byte locations of yet to be written markers
146    for ( UInt uiUpdateLOCIdx = uiInsertIdx+1; uiUpdateLOCIdx < uiTileMarkerCount; uiUpdateLOCIdx++ )
147    {
148      UInt uiLocation = nalu.m_Bitstream.getTileMarkerLocation( uiUpdateLOCIdx );
149      nalu.m_Bitstream.setTileMarkerLocation( uiUpdateLOCIdx, uiLocation + 3 );
150    }
151  }
152  out.write((char*)&(*rbsp.begin()), rbsp.end() - rbsp.begin());
153
154
155  /* 7.4.1.1
156   * ... when the last byte of the RBSP data is equal to 0x00 (which can
157   * only occur when the RBSP ends in a cabac_zero_word), a final byte equal
158   * to 0x03 is appended to the end of the data.
159   */
160  if (rbsp.back() == 0x00)
161  {
162    out.write(emulation_prevention_three_byte, 1);
163  }
164}
165
166/**
167 * Write rbsp_trailing_bits to bs causing it to become byte-aligned
168 */
169void writeRBSPTrailingBits(TComOutputBitstream& bs)
170{
171  bs.write( 1, 1 );
172  bs.writeAlignZero();
173}
174
175#if !QC_MVHEVC_B0046
176/**
177 * Copy NALU from naluSrc to naluDest
178 */
179void copyNaluData(OutputNALUnit& naluDest, const OutputNALUnit& naluSrc)
180{
181  naluDest.m_nalUnitType = naluSrc.m_nalUnitType;
182  naluDest.m_nalRefFlag  = naluSrc.m_nalRefFlag;
183#if !VIDYO_VPS_INTEGRATION
184  naluDest.m_viewId      = naluSrc.m_viewId;
185  naluDest.m_isDepth     = naluSrc.m_isDepth;
186#endif
187  naluDest.m_temporalId  = naluSrc.m_temporalId;
188#if VIDYO_VPS_INTEGRATION
189  naluDest.m_layerId = naluSrc.m_layerId;
190#else
191 
192#endif
193  naluDest.m_Bitstream   = naluSrc.m_Bitstream;
194}
195#endif
196
197//! \}
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