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72 lines
2.5 KiB
72 lines
2.5 KiB
/* |
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* Copyright (c) 2023 Jan Ekström <jeebjp@gmail.com> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVUTIL_AMBIENT_VIEWING_ENVIRONMENT_H |
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#define AVUTIL_AMBIENT_VIEWING_ENVIRONMENT_H |
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#include <stddef.h> |
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#include "frame.h" |
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#include "rational.h" |
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/** |
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* Ambient viewing environment metadata as defined by H.274. The values are |
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* saved in AVRationals so that they keep their exactness, while allowing for |
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* easy access to a double value with f.ex. av_q2d. |
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* |
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* @note sizeof(AVAmbientViewingEnvironment) is not part of the public ABI, and |
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* it must be allocated using av_ambient_viewing_environment_alloc. |
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*/ |
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typedef struct AVAmbientViewingEnvironment { |
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/** |
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* Environmental illuminance of the ambient viewing environment in lux. |
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*/ |
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AVRational ambient_illuminance; |
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/** |
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* Normalized x chromaticity coordinate of the environmental ambient light |
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* in the nominal viewing environment according to the CIE 1931 definition |
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* of x and y as specified in ISO/CIE 11664-1. |
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*/ |
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AVRational ambient_light_x; |
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/** |
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* Normalized y chromaticity coordinate of the environmental ambient light |
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* in the nominal viewing environment according to the CIE 1931 definition |
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* of x and y as specified in ISO/CIE 11664-1. |
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*/ |
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AVRational ambient_light_y; |
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} AVAmbientViewingEnvironment; |
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/** |
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* Allocate an AVAmbientViewingEnvironment structure. |
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* |
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* @return the newly allocated struct or NULL on failure |
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*/ |
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AVAmbientViewingEnvironment *av_ambient_viewing_environment_alloc(size_t *size); |
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/** |
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* Allocate and add an AVAmbientViewingEnvironment structure to an existing |
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* AVFrame as side data. |
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* |
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* @return the newly allocated struct, or NULL on failure |
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*/ |
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AVAmbientViewingEnvironment *av_ambient_viewing_environment_create_side_data(AVFrame *frame); |
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#endif /* AVUTIL_AMBIENT_VIEWING_ENVIRONMENT_H */
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