/* * EVC definitions and enums * Copyright (c) 2022 Dawid Kozinski * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef AVCODEC_EVC_H #define AVCODEC_EVC_H // The length field that indicates the length in bytes of the following NAL unit is configured to be of 4 bytes #define EVC_NALU_LENGTH_PREFIX_SIZE (4) /* byte */ #define EVC_NALU_HEADER_SIZE (2) /* byte */ /** * @see ISO_IEC_23094-1_2020, 7.4.2.2 NAL unit header semantic * Table 4 - NAL unit type codes and NAL unit type classes */ enum EVCNALUnitType { EVC_NOIDR_NUT = 0, /* Coded slice of a non-IDR picture */ EVC_IDR_NUT = 1, /* Coded slice of an IDR picture */ EVC_RSV_VCL_NUT02 = 2, EVC_RSV_VCL_NUT03 = 3, EVC_RSV_VCL_NUT04 = 4, EVC_RSV_VCL_NUT05 = 5, EVC_RSV_VCL_NUT06 = 6, EVC_RSV_VCL_NUT07 = 7, EVC_RSV_VCL_NUT08 = 8, EVC_RSV_VCL_NUT09 = 9, EVC_RSV_VCL_NUT10 = 10, EVC_RSV_VCL_NUT11 = 11, EVC_RSV_VCL_NUT12 = 12, EVC_RSV_VCL_NUT13 = 13, EVC_RSV_VCL_NUT14 = 14, EVC_RSV_VCL_NUT15 = 15, EVC_RSV_VCL_NUT16 = 16, EVC_RSV_VCL_NUT17 = 17, EVC_RSV_VCL_NUT18 = 18, EVC_RSV_VCL_NUT19 = 19, EVC_RSV_VCL_NUT20 = 20, EVC_RSV_VCL_NUT21 = 21, EVC_RSV_VCL_NUT22 = 22, EVC_RSV_VCL_NUT23 = 23, EVC_SPS_NUT = 24, /* Sequence parameter set */ EVC_PPS_NUT = 25, /* Picture paremeter set */ EVC_APS_NUT = 26, /* Adaptation parameter set */ EVC_FD_NUT = 27, /* Filler data */ EVC_SEI_NUT = 28, /* Supplemental enhancement information */ EVC_RSV_NONVCL29 = 29, EVC_RSV_NONVCL30 = 30, EVC_RSV_NONVCL31 = 31, EVC_RSV_NONVCL32 = 32, EVC_RSV_NONVCL33 = 33, EVC_RSV_NONVCL34 = 34, EVC_RSV_NONVCL35 = 35, EVC_RSV_NONVCL36 = 36, EVC_RSV_NONVCL37 = 37, EVC_RSV_NONVCL38 = 38, EVC_RSV_NONVCL39 = 39, EVC_RSV_NONVCL40 = 40, EVC_RSV_NONVCL41 = 41, EVC_RSV_NONVCL42 = 42, EVC_RSV_NONVCL43 = 43, EVC_RSV_NONVCL44 = 44, EVC_RSV_NONVCL45 = 45, EVC_RSV_NONVCL46 = 46, EVC_RSV_NONVCL47 = 47, EVC_RSV_NONVCL48 = 48, EVC_RSV_NONVCL49 = 49, EVC_RSV_NONVCL50 = 50, EVC_RSV_NONVCL51 = 51, EVC_RSV_NONVCL52 = 52, EVC_RSV_NONVCL53 = 53, EVC_RSV_NONVCL54 = 54, EVC_RSV_NONVCL55 = 55, EVC_UNSPEC_NUT56 = 56, EVC_UNSPEC_NUT57 = 57, EVC_UNSPEC_NUT58 = 58, EVC_UNSPEC_NUT59 = 59, EVC_UNSPEC_NUT60 = 60, EVC_UNSPEC_NUT61 = 61, EVC_UNSPEC_NUT62 = 62 }; // slice type // @see ISO_IEC_23094-1_2020 7.4.5 Slice header semantics // enum EVCSliceType { EVC_SLICE_TYPE_B = 0, EVC_SLICE_TYPE_P = 1, EVC_SLICE_TYPE_I = 2 }; enum { // 7.4.3.2: aps_video_parameter_set_id is u(4). EVC_MAX_APS_COUNT = 32, // 7.4.3.1: sps_seq_parameter_set_id is in [0, 15]. EVC_MAX_SPS_COUNT = 16, // 7.4.3.2: pps_pic_parameter_set_id is in [0, 63]. EVC_MAX_PPS_COUNT = 64, // 7.4.5: slice header slice_pic_parameter_set_id in [0, 63] EVC_MAX_SH_COUNT = 64, // E.3.2: cpb_cnt_minus1[i] is in [0, 31]. EVC_MAX_CPB_CNT = 32, // A.4.1: in table A.1 the highest level allows a MaxLumaPs of 35 651 584. EVC_MAX_LUMA_PS = 35651584, EVC_MAX_NUM_REF_PICS = 21, EVC_MAX_NUM_RPLS = 32, // A.4.1: pic_width_in_luma_samples and pic_height_in_luma_samples are // constrained to be not greater than sqrt(MaxLumaPs * 8). Hence height/ // width are bounded above by sqrt(8 * 35651584) = 16888.2 samples. EVC_MAX_WIDTH = 16888, EVC_MAX_HEIGHT = 16888, // A.4.1: table A.1 allows at most 22 tile rows for any level. EVC_MAX_TILE_ROWS = 22, // A.4.1: table A.1 allows at most 20 tile columns for any level. EVC_MAX_TILE_COLUMNS = 20, // A.4.1: table A.1 allows at most 600 slice segments for any level. EVC_MAX_SLICE_SEGMENTS = 600, // 7.4.7.1: in the worst case (tiles_enabled_flag and // entropy_coding_sync_enabled_flag are both set), entry points can be // placed at the beginning of every Ctb row in every tile, giving an // upper bound of (num_tile_columns_minus1 + 1) * PicHeightInCtbsY - 1. // Only a stream with very high resolution and perverse parameters could // get near that, though, so set a lower limit here with the maximum // possible value for 4K video (at most 135 16x16 Ctb rows). HEVC_MAX_ENTRY_POINT_OFFSETS = EVC_MAX_TILE_COLUMNS * 135, }; #endif // AVCODEC_EVC_H