FFmpeg
av1_levels.c
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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 
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  pic_size = width * height;
61  display_rate = (uint64_t)pic_size * fps;
62 
63  for (int i = 0; i < FF_ARRAY_ELEMS(av1_levels); i++) {
65  // Limitation: decode rate, header rate, compress rate, etc. are not considered.
66  if (pic_size > level->max_pic_size)
67  continue;
68  if (width > level->max_h_size)
69  continue;
70  if (height > level->max_v_size)
71  continue;
72  if (display_rate > level->max_display_rate)
73  continue;
74 
75  if (tier)
76  max_br = level->high_mbps;
77  else
78  max_br = level->main_mbps;
79  if (!max_br)
80  continue;
81  if (bitrate > (int64_t)(1000000.0 * max_br))
82  continue;
83 
84  if (tiles > level->max_tiles)
85  continue;
86  if (tile_cols > level->max_tile_cols)
87  continue;
88  return level;
89  }
90 
91  return NULL;
92 }
level
uint8_t level
Definition: svq3.c:204
ff_av1_guess_level
const AV1LevelDescriptor * ff_av1_guess_level(int64_t bitrate, int tier, int width, int height, int tiles, int tile_cols, float fps)
Guess the level of a stream from some parameters.
Definition: av1_levels.c:48
height
int height
Definition: av1_levels.c:28
macros.h
tiles
int tiles
Definition: av1_levels.c:72
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen.c:29
bitrate
int64_t bitrate
Definition: av1_levels.c:47
tile_cols
int tile_cols
Definition: av1_levels.c:73
tier
int tier
Definition: av1_levels.c:48
NULL
#define NULL
Definition: coverity.c:32
AV1LevelDescriptor
Definition: av1_levels.h:26
width
int width
Definition: av1_levels.c:27
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:255
av1_levels
static const AV1LevelDescriptor av1_levels[]
ignore entries which named in spec but no details.
Definition: av1_levels.c:26
av1_levels.h