|
0
|
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) 2010-2014, 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 #pragma once
|
|
|
35
|
|
|
36 #ifndef __ANNEXBWRITE__
|
|
|
37 #define __ANNEXBWRITE__
|
|
|
38
|
|
|
39 #include <ostream>
|
|
|
40 #include "TLibCommon/AccessUnit.h"
|
|
|
41 #include "NALwrite.h"
|
|
|
42
|
|
|
43 //! \ingroup TLibEncoder
|
|
|
44 //! \{
|
|
|
45
|
|
|
46 /**
|
|
|
47 * write all NALunits in au to bytestream out in a manner satisfying
|
|
|
48 * AnnexB of AVC. NALunits are written in the order they are found in au.
|
|
|
49 * the zero_byte word is appended to:
|
|
|
50 * - the initial startcode in the access unit,
|
|
|
51 * - any SPS/PPS nal units
|
|
|
52 */
|
|
|
53 static std::vector<UInt> writeAnnexB(std::ostream& out, const AccessUnit& au)
|
|
|
54 {
|
|
|
55 std::vector<UInt> annexBsizes;
|
|
|
56
|
|
|
57 for (AccessUnit::const_iterator it = au.begin(); it != au.end(); it++)
|
|
|
58 {
|
|
|
59 const NALUnitEBSP& nalu = **it;
|
|
|
60 UInt size = 0; /* size of annexB unit in bytes */
|
|
|
61
|
|
|
62 static const Char start_code_prefix[] = {0,0,0,1};
|
|
|
63 if (it == au.begin() || nalu.m_nalUnitType == NAL_UNIT_VPS || nalu.m_nalUnitType == NAL_UNIT_SPS || nalu.m_nalUnitType == NAL_UNIT_PPS)
|
|
|
64 {
|
|
|
65 /* From AVC, When any of the following conditions are fulfilled, the
|
|
|
66 * zero_byte syntax element shall be present:
|
|
|
67 * - the nal_unit_type within the nal_unit() is equal to 7 (sequence
|
|
|
68 * parameter set) or 8 (picture parameter set),
|
|
|
69 * - the byte stream NAL unit syntax structure contains the first NAL
|
|
|
70 * unit of an access unit in decoding order, as specified by subclause
|
|
|
71 * 7.4.1.2.3.
|
|
|
72 */
|
|
|
73 out.write(start_code_prefix, 4);
|
|
|
74 size += 4;
|
|
|
75 }
|
|
|
76 else
|
|
|
77 {
|
|
|
78 out.write(start_code_prefix+1, 3);
|
|
|
79 size += 3;
|
|
|
80 }
|
|
|
81 out << nalu.m_nalUnitData.str();
|
|
|
82 size += UInt(nalu.m_nalUnitData.str().size());
|
|
|
83
|
|
|
84 annexBsizes.push_back(size);
|
|
|
85 }
|
|
|
86
|
|
|
87 return annexBsizes;
|
|
|
88 }
|
|
|
89 //! \}
|
|
|
90
|
|
|
91 #endif
|
