| /* | |
| * Copyright (c) 2023 Jan Ekström <jeebjp@gmail.com> | |
| * | |
| * 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 | |
| */ | |
| /** | |
| * Ambient viewing environment metadata as defined by H.274. The values are | |
| * saved in AVRationals so that they keep their exactness, while allowing for | |
| * easy access to a double value with f.ex. av_q2d. | |
| * | |
| * @note sizeof(AVAmbientViewingEnvironment) is not part of the public ABI, and | |
| * it must be allocated using av_ambient_viewing_environment_alloc. | |
| */ | |
| typedef struct AVAmbientViewingEnvironment { | |
| /** | |
| * Environmental illuminance of the ambient viewing environment in lux. | |
| */ | |
| AVRational ambient_illuminance; | |
| /** | |
| * Normalized x chromaticity coordinate of the environmental ambient light | |
| * in the nominal viewing environment according to the CIE 1931 definition | |
| * of x and y as specified in ISO/CIE 11664-1. | |
| */ | |
| AVRational ambient_light_x; | |
| /** | |
| * Normalized y chromaticity coordinate of the environmental ambient light | |
| * in the nominal viewing environment according to the CIE 1931 definition | |
| * of x and y as specified in ISO/CIE 11664-1. | |
| */ | |
| AVRational ambient_light_y; | |
| } AVAmbientViewingEnvironment; | |
| /** | |
| * Allocate an AVAmbientViewingEnvironment structure. | |
| * | |
| * @return the newly allocated struct or NULL on failure | |
| */ | |
| AVAmbientViewingEnvironment *av_ambient_viewing_environment_alloc(size_t *size); | |
| /** | |
| * Allocate and add an AVAmbientViewingEnvironment structure to an existing | |
| * AVFrame as side data. | |
| * | |
| * @return the newly allocated struct, or NULL on failure | |
| */ | |
| AVAmbientViewingEnvironment *av_ambient_viewing_environment_create_side_data(AVFrame *frame); | |