source: 3DVCSoftware/trunk/source/Lib/TLibEncoder/NALwrite.cpp @ 210

Last change on this file since 210 was 210, checked in by tech, 12 years ago

Reintegrated /branches/HTM-5.0-dev0 rev. 207.

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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#if NAL_REF_FLAG
59  bsNALUHeader.write(nalu.m_nalRefFlag? 1 : 0, 1); // nal_ref_flag
60  bsNALUHeader.write(nalu.m_nalUnitType, 6);          // nal_unit_type
61#else
62  bsNALUHeader.write(nalu.m_nalRefIDC, 2); // nal_ref_idc
63  bsNALUHeader.write(nalu.m_nalUnitType, 5); // nal_unit_type
64#endif
65
66#if QC_MVHEVC_B0046
67  bsNALUHeader.write(nalu.m_layerId,        5); // when nal_ref_flag is signalled, 5 bits here. otherwise, 6 bits
68  bsNALUHeader.write(nalu.m_temporalId + 1, 3); // temporal_id
69#else
70#if VIDYO_VPS_INTEGRATION
71  bsNALUHeader.write(nalu.m_temporalId, 3); // temporal_id
72  bsNALUHeader.write(nalu.m_layerId + 1, 5); // layer_id_plus1
73#else
74#if H0388
75  bsNALUHeader.write(nalu.m_temporalId, 3); // temporal_id
76 // bsNALUHeader.write(1, 5); // reserved_one_5bits
77  bsNALUHeader.write(nalu.m_viewId+1,4); 
78  bsNALUHeader.write(nalu.m_isDepth,1);
79#else
80  switch (nalu.m_nalUnitType)
81  {
82  case NAL_UNIT_CODED_SLICE:
83  case NAL_UNIT_CODED_SLICE_IDR:
84#if H0566_TLA
85#if !QC_REM_IDV_B0046
86  case NAL_UNIT_CODED_SLICE_IDV:
87#endif
88  case NAL_UNIT_CODED_SLICE_CRA:
89  case NAL_UNIT_CODED_SLICE_TLA:
90#else
91  case NAL_UNIT_CODED_SLICE_CDR:
92#endif
93    bsNALUHeader.write(nalu.m_temporalId, 3); // temporal_id
94    bsNALUHeader.write(nalu.m_OutputFlag, 1); // output_flag
95  //  bsNALUHeader.write(1, 4); // reserved_one_4bits
96    bsNALUHeader.write(nalu.m_viewId+1,3); 
97    bsNALUHeader.write(nalu.m_isDepth,1);
98    break;
99  default: break;
100  }
101#endif
102#endif
103#endif
104  out.write(bsNALUHeader.getByteStream(), bsNALUHeader.getByteStreamLength());
105
106  /* write out rsbp_byte's, inserting any required
107   * emulation_prevention_three_byte's */
108  /* 7.4.1 ...
109   * emulation_prevention_three_byte is a byte equal to 0x03. When an
110   * emulation_prevention_three_byte is present in the NAL unit, it shall be
111   * discarded by the decoding process.
112   * The last byte of the NAL unit shall not be equal to 0x00.
113   * Within the NAL unit, the following three-byte sequences shall not occur at
114   * any byte-aligned position:
115   *  - 0x000000
116   *  - 0x000001
117   *  - 0x000002
118   * Within the NAL unit, any four-byte sequence that starts with 0x000003
119   * other than the following sequences shall not occur at any byte-aligned
120   * position:
121   *  - 0x00000300
122   *  - 0x00000301
123   *  - 0x00000302
124   *  - 0x00000303
125   */
126  vector<uint8_t>& rbsp   = nalu.m_Bitstream.getFIFO();
127  UInt uiTileMarkerCount  = nalu.m_Bitstream.getTileMarkerLocationCount();
128
129  for (vector<uint8_t>::iterator it = rbsp.begin(); it != rbsp.end();)
130  {
131    /* 1) find the next emulated 00 00 {00,01,02,03}
132     * 2a) if not found, write all remaining bytes out, stop.
133     * 2b) otherwise, write all non-emulated bytes out
134     * 3) insert emulation_prevention_three_byte
135     */
136    vector<uint8_t>::iterator found = it;
137    do
138    {
139      /* NB, end()-1, prevents finding a trailing two byte sequence */
140      found = search_n(found, rbsp.end()-1, 2, 0);
141      found++;
142      /* if not found, found == end, otherwise found = second zero byte */
143      if (found == rbsp.end())
144        break;
145      if (*(++found) <= 3)
146        break;
147    } while (true);
148
149    UInt uiDistance = (UInt)(found - rbsp.begin());
150    for ( UInt uiMrkrIdx = 0; uiMrkrIdx < uiTileMarkerCount ; uiMrkrIdx++ )
151    {   
152      UInt uiByteLocation   = nalu.m_Bitstream.getTileMarkerLocation( uiMrkrIdx );
153      if (found != rbsp.end() && uiByteLocation > (uiDistance - 2) )
154      {
155        nalu.m_Bitstream.setTileMarkerLocation( uiMrkrIdx, uiByteLocation+1 );
156      }
157    }
158    it = found;
159    if (found != rbsp.end())
160    {
161      it = rbsp.insert(found, emulation_prevention_three_byte[0]);
162    }
163  }
164
165  // Insert tile markers
166  TComOutputBitstream cTileMarker;
167  UInt uiMarker = 0x000002;
168  cTileMarker.write(uiMarker, 24);
169  for ( UInt uiInsertIdx   = 0; uiInsertIdx < uiTileMarkerCount ; uiInsertIdx++ )
170  {
171    UInt uiByteLocation   = nalu.m_Bitstream.getTileMarkerLocation( uiInsertIdx );
172    nalu.m_Bitstream.insertAt( cTileMarker, uiByteLocation ); // 0x000002
173
174    // update tile marker byte locations of yet to be written markers
175    for ( UInt uiUpdateLOCIdx = uiInsertIdx+1; uiUpdateLOCIdx < uiTileMarkerCount; uiUpdateLOCIdx++ )
176    {
177      UInt uiLocation = nalu.m_Bitstream.getTileMarkerLocation( uiUpdateLOCIdx );
178      nalu.m_Bitstream.setTileMarkerLocation( uiUpdateLOCIdx, uiLocation + 3 );
179    }
180  }
181  out.write((char*)&(*rbsp.begin()), rbsp.end() - rbsp.begin());
182
183
184  /* 7.4.1.1
185   * ... when the last byte of the RBSP data is equal to 0x00 (which can
186   * only occur when the RBSP ends in a cabac_zero_word), a final byte equal
187   * to 0x03 is appended to the end of the data.
188   */
189  if (rbsp.back() == 0x00)
190  {
191    out.write(emulation_prevention_three_byte, 1);
192  }
193}
194
195/**
196 * Write rbsp_trailing_bits to bs causing it to become byte-aligned
197 */
198void writeRBSPTrailingBits(TComOutputBitstream& bs)
199{
200  bs.write( 1, 1 );
201  bs.writeAlignZero();
202}
203
204#if !QC_MVHEVC_B0046
205/**
206 * Copy NALU from naluSrc to naluDest
207 */
208void copyNaluData(OutputNALUnit& naluDest, const OutputNALUnit& naluSrc)
209{
210  naluDest.m_nalUnitType = naluSrc.m_nalUnitType;
211#if NAL_REF_FLAG
212  naluDest.m_nalRefFlag  = naluSrc.m_nalRefFlag;
213#else
214  naluDest.m_nalRefIDC   = naluSrc.m_nalRefIDC;
215#endif
216#if !VIDYO_VPS_INTEGRATION
217  naluDest.m_viewId      = naluSrc.m_viewId;
218  naluDest.m_isDepth     = naluSrc.m_isDepth;
219#endif
220  naluDest.m_temporalId  = naluSrc.m_temporalId;
221#if VIDYO_VPS_INTEGRATION
222  naluDest.m_layerId = naluSrc.m_layerId;
223#else
224 
225#if !H0388
226  naluDest.m_OutputFlag  = naluSrc.m_OutputFlag;
227#endif
228#endif
229  naluDest.m_Bitstream   = naluSrc.m_Bitstream;
230}
231#endif
232
233//! \}
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