1 /* 2 * HEVC shared code 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21 #ifndef AVCODEC_HEVC_H 22 #define AVCODEC_HEVC_H 23 24 /** 25 * Table 7-1 – NAL unit type codes and NAL unit type classes in 26 * T-REC-H.265-201802 27 */ 28 enum HEVCNALUnitType { 29 HEVC_NAL_TRAIL_N = 0, 30 HEVC_NAL_TRAIL_R = 1, 31 HEVC_NAL_TSA_N = 2, 32 HEVC_NAL_TSA_R = 3, 33 HEVC_NAL_STSA_N = 4, 34 HEVC_NAL_STSA_R = 5, 35 HEVC_NAL_RADL_N = 6, 36 HEVC_NAL_RADL_R = 7, 37 HEVC_NAL_RASL_N = 8, 38 HEVC_NAL_RASL_R = 9, 39 HEVC_NAL_VCL_N10 = 10, 40 HEVC_NAL_VCL_R11 = 11, 41 HEVC_NAL_VCL_N12 = 12, 42 HEVC_NAL_VCL_R13 = 13, 43 HEVC_NAL_VCL_N14 = 14, 44 HEVC_NAL_VCL_R15 = 15, 45 HEVC_NAL_BLA_W_LP = 16, 46 HEVC_NAL_BLA_W_RADL = 17, 47 HEVC_NAL_BLA_N_LP = 18, 48 HEVC_NAL_IDR_W_RADL = 19, 49 HEVC_NAL_IDR_N_LP = 20, 50 HEVC_NAL_CRA_NUT = 21, 51 HEVC_NAL_RSV_IRAP_VCL22 = 22, 52 HEVC_NAL_RSV_IRAP_VCL23 = 23, 53 HEVC_NAL_RSV_VCL24 = 24, 54 HEVC_NAL_RSV_VCL25 = 25, 55 HEVC_NAL_RSV_VCL26 = 26, 56 HEVC_NAL_RSV_VCL27 = 27, 57 HEVC_NAL_RSV_VCL28 = 28, 58 HEVC_NAL_RSV_VCL29 = 29, 59 HEVC_NAL_RSV_VCL30 = 30, 60 HEVC_NAL_RSV_VCL31 = 31, 61 HEVC_NAL_VPS = 32, 62 HEVC_NAL_SPS = 33, 63 HEVC_NAL_PPS = 34, 64 HEVC_NAL_AUD = 35, 65 HEVC_NAL_EOS_NUT = 36, 66 HEVC_NAL_EOB_NUT = 37, 67 HEVC_NAL_FD_NUT = 38, 68 HEVC_NAL_SEI_PREFIX = 39, 69 HEVC_NAL_SEI_SUFFIX = 40, 70 HEVC_NAL_RSV_NVCL41 = 41, 71 HEVC_NAL_RSV_NVCL42 = 42, 72 HEVC_NAL_RSV_NVCL43 = 43, 73 HEVC_NAL_RSV_NVCL44 = 44, 74 HEVC_NAL_RSV_NVCL45 = 45, 75 HEVC_NAL_RSV_NVCL46 = 46, 76 HEVC_NAL_RSV_NVCL47 = 47, 77 HEVC_NAL_UNSPEC48 = 48, 78 HEVC_NAL_UNSPEC49 = 49, 79 HEVC_NAL_UNSPEC50 = 50, 80 HEVC_NAL_UNSPEC51 = 51, 81 HEVC_NAL_UNSPEC52 = 52, 82 HEVC_NAL_UNSPEC53 = 53, 83 HEVC_NAL_UNSPEC54 = 54, 84 HEVC_NAL_UNSPEC55 = 55, 85 HEVC_NAL_UNSPEC56 = 56, 86 HEVC_NAL_UNSPEC57 = 57, 87 HEVC_NAL_UNSPEC58 = 58, 88 HEVC_NAL_UNSPEC59 = 59, 89 HEVC_NAL_UNSPEC60 = 60, 90 HEVC_NAL_UNSPEC61 = 61, 91 HEVC_NAL_UNSPEC62 = 62, 92 HEVC_NAL_UNSPEC63 = 63, 93 }; 94 95 enum HEVCSliceType { 96 HEVC_SLICE_B = 0, 97 HEVC_SLICE_P = 1, 98 HEVC_SLICE_I = 2, 99 }; 100 101 enum { 102 // 7.4.3.1: vps_max_layers_minus1 is in [0, 62]. 103 HEVC_MAX_LAYERS = 63, 104 // 7.4.3.1: vps_max_sub_layers_minus1 is in [0, 6]. 105 HEVC_MAX_SUB_LAYERS = 7, 106 // 7.4.3.1: vps_num_layer_sets_minus1 is in [0, 1023]. 107 HEVC_MAX_LAYER_SETS = 1024, 108 109 // 7.4.2.1: vps_video_parameter_set_id is u(4). 110 HEVC_MAX_VPS_COUNT = 16, 111 // 7.4.3.2.1: sps_seq_parameter_set_id is in [0, 15]. 112 HEVC_MAX_SPS_COUNT = 16, 113 // 7.4.3.3.1: pps_pic_parameter_set_id is in [0, 63]. 114 HEVC_MAX_PPS_COUNT = 64, 115 116 // A.4.2: MaxDpbSize is bounded above by 16. 117 HEVC_MAX_DPB_SIZE = 16, 118 // 7.4.3.1: vps_max_dec_pic_buffering_minus1[i] is in [0, MaxDpbSize - 1]. 119 HEVC_MAX_REFS = HEVC_MAX_DPB_SIZE, 120 121 // 7.4.3.2.1: num_short_term_ref_pic_sets is in [0, 64]. 122 HEVC_MAX_SHORT_TERM_REF_PIC_SETS = 64, 123 // 7.4.3.2.1: num_long_term_ref_pics_sps is in [0, 32]. 124 HEVC_MAX_LONG_TERM_REF_PICS = 32, 125 126 // A.3: all profiles require that CtbLog2SizeY is in [4, 6]. 127 HEVC_MIN_LOG2_CTB_SIZE = 4, 128 HEVC_MAX_LOG2_CTB_SIZE = 6, 129 130 // E.3.2: cpb_cnt_minus1[i] is in [0, 31]. 131 HEVC_MAX_CPB_CNT = 32, 132 133 // A.4.1: in table A.6 the highest level allows a MaxLumaPs of 35 651 584. 134 HEVC_MAX_LUMA_PS = 35651584, 135 // A.4.1: pic_width_in_luma_samples and pic_height_in_luma_samples are 136 // constrained to be not greater than sqrt(MaxLumaPs * 8). Hence height/ 137 // width are bounded above by sqrt(8 * 35651584) = 16888.2 samples. 138 HEVC_MAX_WIDTH = 16888, 139 HEVC_MAX_HEIGHT = 16888, 140 141 // A.4.1: table A.6 allows at most 22 tile rows for any level. 142 HEVC_MAX_TILE_ROWS = 22, 143 // A.4.1: table A.6 allows at most 20 tile columns for any level. 144 HEVC_MAX_TILE_COLUMNS = 20, 145 146 // A.4.2: table A.6 allows at most 600 slice segments for any level. 147 HEVC_MAX_SLICE_SEGMENTS = 600, 148 149 // 7.4.7.1: in the worst case (tiles_enabled_flag and 150 // entropy_coding_sync_enabled_flag are both set), entry points can be 151 // placed at the beginning of every Ctb row in every tile, giving an 152 // upper bound of (num_tile_columns_minus1 + 1) * PicHeightInCtbsY - 1. 153 // Only a stream with very high resolution and perverse parameters could 154 // get near that, though, so set a lower limit here with the maximum 155 // possible value for 4K video (at most 135 16x16 Ctb rows). 156 HEVC_MAX_ENTRY_POINT_OFFSETS = HEVC_MAX_TILE_COLUMNS * 135, 157 }; 158 159 160 #endif /* AVCODEC_HEVC_H */ 161