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

Last change on this file since 81 was 77, checked in by tech, 12 years ago

Merged with branch/HTM-3.0Samsung REV74 including:

  • restricted residual prediction m24766
  • Inter-view residual prediction m24938
  • VPS concept m24714,m24878, m24945,m24896, m2491
  • reference list modification, restriction on IDR m24876, m24874
  • depth based motion parameter prediction m24829

Fixed bugs:

  • interview prediction
  • VSO

Added:

  • xcode project
File size: 7.8 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
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 VIDYO_VPS_INTEGRATION
67  bsNALUHeader.write(nalu.m_temporalId, 3); // temporal_id
68  bsNALUHeader.write(nalu.m_layerId + 1, 5); // layer_id_plus1
69#else
70#if H0388
71  bsNALUHeader.write(nalu.m_temporalId, 3); // temporal_id
72 // bsNALUHeader.write(1, 5); // reserved_one_5bits
73  bsNALUHeader.write(nalu.m_viewId+1,4); 
74  bsNALUHeader.write(nalu.m_isDepth,1);
75#else
76  switch (nalu.m_nalUnitType)
77  {
78  case NAL_UNIT_CODED_SLICE:
79  case NAL_UNIT_CODED_SLICE_IDR:
80#if H0566_TLA
81  case NAL_UNIT_CODED_SLICE_IDV:
82  case NAL_UNIT_CODED_SLICE_CRA:
83  case NAL_UNIT_CODED_SLICE_TLA:
84#else
85  case NAL_UNIT_CODED_SLICE_CDR:
86#endif
87    bsNALUHeader.write(nalu.m_temporalId, 3); // temporal_id
88    bsNALUHeader.write(nalu.m_OutputFlag, 1); // output_flag
89  //  bsNALUHeader.write(1, 4); // reserved_one_4bits
90    bsNALUHeader.write(nalu.m_viewId+1,3); 
91    bsNALUHeader.write(nalu.m_isDepth,1);
92    break;
93  default: break;
94  }
95#endif
96#endif
97 
98  out.write(bsNALUHeader.getByteStream(), bsNALUHeader.getByteStreamLength());
99
100  /* write out rsbp_byte's, inserting any required
101   * emulation_prevention_three_byte's */
102  /* 7.4.1 ...
103   * emulation_prevention_three_byte is a byte equal to 0x03. When an
104   * emulation_prevention_three_byte is present in the NAL unit, it shall be
105   * discarded by the decoding process.
106   * The last byte of the NAL unit shall not be equal to 0x00.
107   * Within the NAL unit, the following three-byte sequences shall not occur at
108   * any byte-aligned position:
109   *  - 0x000000
110   *  - 0x000001
111   *  - 0x000002
112   * Within the NAL unit, any four-byte sequence that starts with 0x000003
113   * other than the following sequences shall not occur at any byte-aligned
114   * position:
115   *  - 0x00000300
116   *  - 0x00000301
117   *  - 0x00000302
118   *  - 0x00000303
119   */
120  vector<uint8_t>& rbsp   = nalu.m_Bitstream.getFIFO();
121  UInt uiTileMarkerCount  = nalu.m_Bitstream.getTileMarkerLocationCount();
122
123  for (vector<uint8_t>::iterator it = rbsp.begin(); it != rbsp.end();)
124  {
125    /* 1) find the next emulated 00 00 {00,01,02,03}
126     * 2a) if not found, write all remaining bytes out, stop.
127     * 2b) otherwise, write all non-emulated bytes out
128     * 3) insert emulation_prevention_three_byte
129     */
130    vector<uint8_t>::iterator found = it;
131    do
132    {
133      /* NB, end()-1, prevents finding a trailing two byte sequence */
134      found = search_n(found, rbsp.end()-1, 2, 0);
135      found++;
136      /* if not found, found == end, otherwise found = second zero byte */
137      if (found == rbsp.end())
138        break;
139      if (*(++found) <= 3)
140        break;
141    } while (true);
142
143    UInt uiDistance = (UInt)(found - rbsp.begin());
144    for ( UInt uiMrkrIdx = 0; uiMrkrIdx < uiTileMarkerCount ; uiMrkrIdx++ )
145    {   
146      UInt uiByteLocation   = nalu.m_Bitstream.getTileMarkerLocation( uiMrkrIdx );
147      if (found != rbsp.end() && uiByteLocation > (uiDistance - 2) )
148      {
149        nalu.m_Bitstream.setTileMarkerLocation( uiMrkrIdx, uiByteLocation+1 );
150      }
151    }
152    it = found;
153    if (found != rbsp.end())
154    {
155      it = rbsp.insert(found, emulation_prevention_three_byte[0]);
156    }
157  }
158
159  // Insert tile markers
160  TComOutputBitstream cTileMarker;
161  UInt uiMarker = 0x000002;
162  cTileMarker.write(uiMarker, 24);
163  for ( UInt uiInsertIdx   = 0; uiInsertIdx < uiTileMarkerCount ; uiInsertIdx++ )
164  {
165    UInt uiByteLocation   = nalu.m_Bitstream.getTileMarkerLocation( uiInsertIdx );
166    nalu.m_Bitstream.insertAt( cTileMarker, uiByteLocation ); // 0x000002
167
168    // update tile marker byte locations of yet to be written markers
169    for ( UInt uiUpdateLOCIdx = uiInsertIdx+1; uiUpdateLOCIdx < uiTileMarkerCount; uiUpdateLOCIdx++ )
170    {
171      UInt uiLocation = nalu.m_Bitstream.getTileMarkerLocation( uiUpdateLOCIdx );
172      nalu.m_Bitstream.setTileMarkerLocation( uiUpdateLOCIdx, uiLocation + 3 );
173    }
174  }
175  out.write((char*)&(*rbsp.begin()), rbsp.end() - rbsp.begin());
176
177
178  /* 7.4.1.1
179   * ... when the last byte of the RBSP data is equal to 0x00 (which can
180   * only occur when the RBSP ends in a cabac_zero_word), a final byte equal
181   * to 0x03 is appended to the end of the data.
182   */
183  if (rbsp.back() == 0x00)
184  {
185    out.write(emulation_prevention_three_byte, 1);
186  }
187}
188
189/**
190 * Write rbsp_trailing_bits to bs causing it to become byte-aligned
191 */
192void writeRBSPTrailingBits(TComOutputBitstream& bs)
193{
194  bs.write( 1, 1 );
195  bs.writeAlignZero();
196}
197
198/**
199 * Copy NALU from naluSrc to naluDest
200 */
201void copyNaluData(OutputNALUnit& naluDest, const OutputNALUnit& naluSrc)
202{
203  naluDest.m_nalUnitType = naluSrc.m_nalUnitType;
204#if NAL_REF_FLAG
205  naluDest.m_nalRefFlag  = naluSrc.m_nalRefFlag;
206#else
207  naluDest.m_nalRefIDC   = naluSrc.m_nalRefIDC;
208#endif
209#if !VIDYO_VPS_INTEGRATION
210  naluDest.m_viewId      = naluSrc.m_viewId;
211  naluDest.m_isDepth     = naluSrc.m_isDepth;
212#endif
213  naluDest.m_temporalId  = naluSrc.m_temporalId;
214#if VIDYO_VPS_INTEGRATION
215  naluDest.m_layerId = naluSrc.m_layerId;
216#else
217 
218#if !H0388
219  naluDest.m_OutputFlag  = naluSrc.m_OutputFlag;
220#endif
221#endif
222  naluDest.m_Bitstream   = naluSrc.m_Bitstream;
223}
224
225//! \}
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