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/*
* 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;
}
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