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73 lines
2.5 KiB
73 lines
2.5 KiB
2 years ago
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/*
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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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