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|---|---|---|---|
| 1 | /* | ||
| 2 | * Copyright (c) 2023 Intel Corporation | ||
| 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 | #include <stddef.h> | ||
| 22 | #include "libavutil/macros.h" | ||
| 23 | #include "av1_levels.h" | ||
| 24 | |||
| 25 | /** ignore entries which named in spec but no details. Like level 2.2 and 7.0. */ | ||
| 26 | static const AV1LevelDescriptor av1_levels[] = { | ||
| 27 | // Name MaxVSize MainMbps MaxTiles | ||
| 28 | // | level_idx | MaxDisplayRate | HighMbps | MaxTileCols | ||
| 29 | // | | MaxPicSize | | MaxDecodeRate | | MainCR | | | ||
| 30 | // | | | MaxHSize | | | MaxHeaderRate | | | HighCR| | | ||
| 31 | // | | | | | | | | | | | | | | | ||
| 32 | { "2.0", 0, 147456, 2048, 1152, 4423680, 5529600, 150, 1.5, 0, 2, 0, 8, 4 }, | ||
| 33 | { "2.1", 1, 278784, 2816, 1584, 8363520, 10454400, 150, 3.0, 0, 2, 0, 8, 4 }, | ||
| 34 | { "3.0", 4, 665856, 4352, 2448, 19975680, 24969600, 150, 6.0, 0, 2, 0, 16, 6 }, | ||
| 35 | { "3.1", 5, 1065024, 5504, 3096, 31950720, 39938400, 150, 10.0, 0, 2, 0, 16, 6 }, | ||
| 36 | { "4.0", 8, 2359296, 6144, 3456, 70778880, 77856768, 300, 12.0, 30.0, 4, 4, 32, 8 }, | ||
| 37 | { "4.1", 9, 2359296, 6144, 3456, 141557760, 155713536, 300, 20.0, 50.0, 4, 4, 32, 8 }, | ||
| 38 | { "5.0", 12, 8912896, 8192, 4352, 267386880, 273715200, 300, 30.0, 100.0, 6, 4, 64, 8 }, | ||
| 39 | { "5.1", 13, 8912896, 8192, 4352, 534773760, 547430400, 300, 40.0, 160.0, 8, 4, 64, 8 }, | ||
| 40 | { "5.2", 14, 8912896, 8192, 4352, 1069547520, 1094860800, 300, 60.0, 240.0, 8, 4, 64, 8 }, | ||
| 41 | { "5.3", 15, 8912896, 8192, 4352, 1069547520, 1176502272, 300, 60.0, 240.0, 8, 4, 64, 8 }, | ||
| 42 | { "6.0", 16, 35651584, 16384, 8704, 1069547520, 1176502272, 300, 60.0, 240.0, 8, 4, 128, 16 }, | ||
| 43 | { "6.1", 17, 35651584, 16384, 8704, 2139095040, 2189721600, 300, 100.0, 480.0, 8, 4, 128, 16 }, | ||
| 44 | { "6.2", 18, 35651584, 16384, 8704, 4278190080, 4379443200, 300, 160.0, 800.0, 8, 4, 128, 16 }, | ||
| 45 | { "6.3", 19, 35651584, 16384, 8704, 4278190080, 4706009088, 300, 160.0, 800.0, 8, 4, 128, 16 }, | ||
| 46 | }; | ||
| 47 | |||
| 48 | 35 | const AV1LevelDescriptor *ff_av1_guess_level(int64_t bitrate, | |
| 49 | int tier, | ||
| 50 | int width, | ||
| 51 | int height, | ||
| 52 | int tiles, | ||
| 53 | int tile_cols, | ||
| 54 | float fps) | ||
| 55 | { | ||
| 56 | int pic_size; | ||
| 57 | uint64_t display_rate; | ||
| 58 | float max_br; | ||
| 59 | |||
| 60 | 35 | pic_size = width * height; | |
| 61 | 35 | display_rate = (uint64_t)pic_size * fps; | |
| 62 | |||
| 63 |
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238 | for (int i = 0; i < FF_ARRAY_ELEMS(av1_levels); i++) { |
| 64 | 238 | const AV1LevelDescriptor *level = &av1_levels[i]; | |
| 65 | // Limitation: decode rate, header rate, compress rate, etc. are not considered. | ||
| 66 |
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238 | if (pic_size > level->max_pic_size) |
| 67 | 62 | continue; | |
| 68 |
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176 | if (width > level->max_h_size) |
| 69 | ✗ | continue; | |
| 70 |
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176 | if (height > level->max_v_size) |
| 71 | ✗ | continue; | |
| 72 |
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176 | if (display_rate > level->max_display_rate) |
| 73 | 7 | continue; | |
| 74 | |||
| 75 |
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169 | if (tier) |
| 76 | 60 | max_br = level->high_mbps; | |
| 77 | else | ||
| 78 | 109 | max_br = level->main_mbps; | |
| 79 |
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169 | if (!max_br) |
| 80 | 28 | continue; | |
| 81 |
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141 | if (bitrate > (int64_t)(1000000.0 * max_br)) |
| 82 | 84 | continue; | |
| 83 | |||
| 84 |
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57 | if (tiles > level->max_tiles) |
| 85 | 22 | continue; | |
| 86 |
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35 | if (tile_cols > level->max_tile_cols) |
| 87 | ✗ | continue; | |
| 88 | 35 | return level; | |
| 89 | } | ||
| 90 | |||
| 91 | ✗ | return NULL; | |
| 92 | } | ||
| 93 |