| /* |
| * 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 |
| */ |
| |
| #ifndef AVUTIL_AMBIENT_VIEWING_ENVIRONMENT_H |
| #define AVUTIL_AMBIENT_VIEWING_ENVIRONMENT_H |
| |
| #include <stddef.h> |
| #include "frame.h" |
| #include "rational.h" |
| |
| /** |
| * 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); |
| |
| #endif /* AVUTIL_AMBIENT_VIEWING_ENVIRONMENT_H */ |