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1 /* The copyright in this software is being made available under the BSD
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2 * License, included below. This software may be subject to other third party
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3 * and contributor rights, including patent rights, and no such rights are
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4 * granted under this license.
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5 *
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6 * Copyright (c) 2010-2014, ITU/ISO/IEC
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7 * All rights reserved.
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8 *
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9 * Redistribution and use in source and binary forms, with or without
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10 * modification, are permitted provided that the following conditions are met:
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11 *
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12 * * Redistributions of source code must retain the above copyright notice,
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13 * this list of conditions and the following disclaimer.
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14 * * Redistributions in binary form must reproduce the above copyright notice,
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15 * this list of conditions and the following disclaimer in the documentation
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16 * and/or other materials provided with the distribution.
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17 * * Neither the name of the ITU/ISO/IEC nor the names of its contributors may
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18 * be used to endorse or promote products derived from this software without
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19 * specific prior written permission.
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20 *
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21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS
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25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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31 * THE POSSIBILITY OF SUCH DAMAGE.
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32 */
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33
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34 #pragma once
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35
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36 #ifndef __NAL__
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37 #define __NAL__
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38
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39 #include <vector>
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40 #include <sstream>
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41 #include "CommonDef.h"
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42
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43 class TComOutputBitstream;
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44
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45 /**
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46 * Represents a single NALunit header and the associated RBSPayload
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47 */
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48 struct NALUnit
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49 {
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50 NalUnitType m_nalUnitType; ///< nal_unit_type
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51 UInt m_temporalId; ///< temporal_id
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52 UInt m_reservedZero6Bits; ///< reserved_zero_6bits
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53
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54 /** construct an NALunit structure with given header values. */
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55 NALUnit(
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56 NalUnitType nalUnitType,
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57 Int temporalId = 0,
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58 Int reservedZero6Bits = 0)
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59 :m_nalUnitType (nalUnitType)
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60 ,m_temporalId (temporalId)
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61 ,m_reservedZero6Bits(reservedZero6Bits)
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62 {}
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63
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64 /** default constructor - no initialization; must be perfomed by user */
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65 NALUnit() {}
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66
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67 /** returns true if the NALunit is a slice NALunit */
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68 Bool isSlice()
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69 {
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70 return m_nalUnitType == NAL_UNIT_CODED_SLICE_TRAIL_R
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71 || m_nalUnitType == NAL_UNIT_CODED_SLICE_TRAIL_N
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72 || m_nalUnitType == NAL_UNIT_CODED_SLICE_TSA_R
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73 || m_nalUnitType == NAL_UNIT_CODED_SLICE_TSA_N
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74 || m_nalUnitType == NAL_UNIT_CODED_SLICE_STSA_R
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75 || m_nalUnitType == NAL_UNIT_CODED_SLICE_STSA_N
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76 || m_nalUnitType == NAL_UNIT_CODED_SLICE_BLA_W_LP
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77 || m_nalUnitType == NAL_UNIT_CODED_SLICE_BLA_W_RADL
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78 || m_nalUnitType == NAL_UNIT_CODED_SLICE_BLA_N_LP
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79 || m_nalUnitType == NAL_UNIT_CODED_SLICE_IDR_W_RADL
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80 || m_nalUnitType == NAL_UNIT_CODED_SLICE_IDR_N_LP
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81 || m_nalUnitType == NAL_UNIT_CODED_SLICE_CRA
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82 || m_nalUnitType == NAL_UNIT_CODED_SLICE_RADL_N
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83 || m_nalUnitType == NAL_UNIT_CODED_SLICE_RADL_R
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84 || m_nalUnitType == NAL_UNIT_CODED_SLICE_RASL_N
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85 || m_nalUnitType == NAL_UNIT_CODED_SLICE_RASL_R;
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86 }
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87 Bool isSei()
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88 {
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89 return m_nalUnitType == NAL_UNIT_PREFIX_SEI
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90 || m_nalUnitType == NAL_UNIT_SUFFIX_SEI;
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91 }
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92
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93 Bool isVcl()
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94 {
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95 return ( (UInt)m_nalUnitType < 32 );
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96 }
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97 };
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98
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99 struct OutputNALUnit;
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100
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101 /**
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102 * A single NALunit, with complete payload in EBSP format.
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103 */
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104 struct NALUnitEBSP : public NALUnit
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105 {
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106 std::ostringstream m_nalUnitData;
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107
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108 /**
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109 * convert the OutputNALUnit #nalu# into EBSP format by writing out
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110 * the NALUnit header, then the rbsp_bytes including any
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111 * emulation_prevention_three_byte symbols.
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112 */
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113 NALUnitEBSP(OutputNALUnit& nalu);
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114 };
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115 //! \}
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116 //! \}
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117
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118 #endif
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