| 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) 2010-2016, 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 <sstream> |
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| 40 | #include "CommonDef.h" |
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| 41 | |
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| 42 | class TComOutputBitstream; |
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| 43 | |
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| 44 | /** |
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| 45 | * Represents a single NALunit header and the associated RBSPayload |
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| 46 | */ |
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| 47 | struct NALUnit |
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| 48 | { |
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| 49 | NalUnitType m_nalUnitType; ///< nal_unit_type |
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| 50 | UInt m_temporalId; ///< temporal_id |
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| 51 | UInt m_nuhLayerId; ///< nuh_layer_id |
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| 52 | |
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| 53 | NALUnit(const NALUnit &src) |
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| 54 | :m_nalUnitType (src.m_nalUnitType) |
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| 55 | ,m_temporalId (src.m_temporalId) |
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| 56 | ,m_nuhLayerId (src.m_nuhLayerId) |
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| 57 | { } |
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| 58 | /** construct an NALunit structure with given header values. */ |
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| 59 | NALUnit( |
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| 60 | NalUnitType nalUnitType, |
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| 61 | Int temporalId = 0, |
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| 62 | Int nuhLayerId = 0) |
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| 63 | :m_nalUnitType (nalUnitType) |
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| 64 | ,m_temporalId (temporalId) |
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| 65 | ,m_nuhLayerId (nuhLayerId) |
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| 66 | {} |
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| 67 | |
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| 68 | /** default constructor - no initialization; must be performed by user */ |
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| 69 | NALUnit() {} |
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| 70 | |
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| 71 | virtual ~NALUnit() { } |
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| 72 | |
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| 73 | /** returns true if the NALunit is a slice NALunit */ |
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| 74 | Bool isSlice() |
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| 75 | { |
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| 76 | return m_nalUnitType == NAL_UNIT_CODED_SLICE_TRAIL_R |
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| 77 | || m_nalUnitType == NAL_UNIT_CODED_SLICE_TRAIL_N |
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| 78 | || m_nalUnitType == NAL_UNIT_CODED_SLICE_TSA_R |
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| 79 | || m_nalUnitType == NAL_UNIT_CODED_SLICE_TSA_N |
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| 80 | || m_nalUnitType == NAL_UNIT_CODED_SLICE_STSA_R |
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| 81 | || m_nalUnitType == NAL_UNIT_CODED_SLICE_STSA_N |
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| 82 | || m_nalUnitType == NAL_UNIT_CODED_SLICE_BLA_W_LP |
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| 83 | || m_nalUnitType == NAL_UNIT_CODED_SLICE_BLA_W_RADL |
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| 84 | || m_nalUnitType == NAL_UNIT_CODED_SLICE_BLA_N_LP |
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| 85 | || m_nalUnitType == NAL_UNIT_CODED_SLICE_IDR_W_RADL |
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| 86 | || m_nalUnitType == NAL_UNIT_CODED_SLICE_IDR_N_LP |
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| 87 | || m_nalUnitType == NAL_UNIT_CODED_SLICE_CRA |
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| 88 | || m_nalUnitType == NAL_UNIT_CODED_SLICE_RADL_N |
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| 89 | || m_nalUnitType == NAL_UNIT_CODED_SLICE_RADL_R |
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| 90 | || m_nalUnitType == NAL_UNIT_CODED_SLICE_RASL_N |
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| 91 | || m_nalUnitType == NAL_UNIT_CODED_SLICE_RASL_R; |
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| 92 | } |
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| 93 | Bool isSei() |
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| 94 | { |
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| 95 | return m_nalUnitType == NAL_UNIT_PREFIX_SEI |
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| 96 | || m_nalUnitType == NAL_UNIT_SUFFIX_SEI; |
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| 97 | } |
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| 98 | |
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| 99 | Bool isVcl() |
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| 100 | { |
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| 101 | return ( (UInt)m_nalUnitType < 32 ); |
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| 102 | } |
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| 103 | }; |
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| 104 | |
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| 105 | struct OutputNALUnit; |
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| 106 | |
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| 107 | /** |
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| 108 | * A single NALunit, with complete payload in EBSP format. |
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| 109 | */ |
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| 110 | struct NALUnitEBSP : public NALUnit |
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| 111 | { |
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| 112 | std::ostringstream m_nalUnitData; |
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| 113 | |
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| 114 | /** |
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| 115 | * convert the OutputNALUnit nalu into EBSP format by writing out |
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| 116 | * the NALUnit header, then the rbsp_bytes including any |
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| 117 | * emulation_prevention_three_byte symbols. |
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| 118 | */ |
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| 119 | NALUnitEBSP(OutputNALUnit& nalu); |
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| 120 | }; |
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| 121 | //! \} |
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| 122 | //! \} |
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| 123 | |
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| 124 | #endif |
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