| /* |
| * Copyright (c) 2023 Intel Corporation |
| * |
| * 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 |
| */ |
| |
| #include <stddef.h> |
| #include "libavutil/macros.h" |
| #include "av1_levels.h" |
| |
| /** ignore entries which named in spec but no details. Like level 2.2 and 7.0. */ |
| static const AV1LevelDescriptor av1_levels[] = { |
| // Name MaxVSize MainMbps MaxTiles |
| // | level_idx | MaxDisplayRate | HighMbps | MaxTileCols |
| // | | MaxPicSize | | MaxDecodeRate | | MainCR | | |
| // | | | MaxHSize | | | MaxHeaderRate | | | HighCR| | |
| // | | | | | | | | | | | | | | |
| { "2.0", 0, 147456, 2048, 1152, 4423680, 5529600, 150, 1.5, 0, 2, 0, 8, 4 }, |
| { "2.1", 1, 278784, 2816, 1584, 8363520, 10454400, 150, 3.0, 0, 2, 0, 8, 4 }, |
| { "3.0", 4, 665856, 4352, 2448, 19975680, 24969600, 150, 6.0, 0, 2, 0, 16, 6 }, |
| { "3.1", 5, 1065024, 5504, 3096, 31950720, 39938400, 150, 10.0, 0, 2, 0, 16, 6 }, |
| { "4.0", 8, 2359296, 6144, 3456, 70778880, 77856768, 300, 12.0, 30.0, 4, 4, 32, 8 }, |
| { "4.1", 9, 2359296, 6144, 3456, 141557760, 155713536, 300, 20.0, 50.0, 4, 4, 32, 8 }, |
| { "5.0", 12, 8912896, 8192, 4352, 267386880, 273715200, 300, 30.0, 100.0, 6, 4, 64, 8 }, |
| { "5.1", 13, 8912896, 8192, 4352, 534773760, 547430400, 300, 40.0, 160.0, 8, 4, 64, 8 }, |
| { "5.2", 14, 8912896, 8192, 4352, 1069547520, 1094860800, 300, 60.0, 240.0, 8, 4, 64, 8 }, |
| { "5.3", 15, 8912896, 8192, 4352, 1069547520, 1176502272, 300, 60.0, 240.0, 8, 4, 64, 8 }, |
| { "6.0", 16, 35651584, 16384, 8704, 1069547520, 1176502272, 300, 60.0, 240.0, 8, 4, 128, 16 }, |
| { "6.1", 17, 35651584, 16384, 8704, 2139095040, 2189721600, 300, 100.0, 480.0, 8, 4, 128, 16 }, |
| { "6.2", 18, 35651584, 16384, 8704, 4278190080, 4379443200, 300, 160.0, 800.0, 8, 4, 128, 16 }, |
| { "6.3", 19, 35651584, 16384, 8704, 4278190080, 4706009088, 300, 160.0, 800.0, 8, 4, 128, 16 }, |
| }; |
| |
| const AV1LevelDescriptor *ff_av1_guess_level(int64_t bitrate, |
| int tier, |
| int width, |
| int height, |
| int tiles, |
| int tile_cols, |
| float fps) |
| { |
| int pic_size; |
| uint64_t display_rate; |
| float max_br; |
| |
| pic_size = width * height; |
| display_rate = (uint64_t)pic_size * fps; |
| |
| for (int i = 0; i < FF_ARRAY_ELEMS(av1_levels); i++) { |
| const AV1LevelDescriptor *level = &av1_levels[i]; |
| // Limitation: decode rate, header rate, compress rate, etc. are not considered. |
| if (pic_size > level->max_pic_size) |
| continue; |
| if (width > level->max_h_size) |
| continue; |
| if (height > level->max_v_size) |
| continue; |
| if (display_rate > level->max_display_rate) |
| continue; |
| |
| if (tier) |
| max_br = level->high_mbps; |
| else |
| max_br = level->main_mbps; |
| if (!max_br) |
| continue; |
| if (bitrate > (int64_t)(1000000.0 * max_br)) |
| continue; |
| |
| if (tiles > level->max_tiles) |
| continue; |
| if (tile_cols > level->max_tile_cols) |
| continue; |
| return level; |
| } |
| |
| return NULL; |
| } |