mirror of
https://git.ffmpeg.org/ffmpeg.git
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88e78ec6a8
Separate the blocks to make the grouping easier to grasp, add the file properly to the group and fix the file description incorrectly used as filename, fixing the following doxy warning: warning: the name 'Colorspace' supplied as the argument in the \file statement is not an input file
112 lines
3.3 KiB
C
112 lines
3.3 KiB
C
/*
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* Copyright (c) 2016 Ronald S. Bultje <rsbultje@gmail.com>
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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_CSP_H
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#define AVUTIL_CSP_H
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#include "pixfmt.h"
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#include "rational.h"
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/**
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* @file
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* Colorspace value utility functions for libavutil.
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* @ingroup lavu_math_csp
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* @author Ronald S. Bultje <rsbultje@gmail.com>
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* @author Leo Izen <leo.izen@gmail.com>
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*/
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/**
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* @defgroup lavu_math_csp Colorspace Utility
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* @ingroup lavu_math
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* @{
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*/
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/**
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* Struct containing luma coefficients to be used for RGB to YUV/YCoCg, or similar
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* calculations.
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*/
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typedef struct AVLumaCoefficients {
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AVRational cr, cg, cb;
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} AVLumaCoefficients;
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/**
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* Struct containing chromaticity x and y values for the standard CIE 1931
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* chromaticity definition.
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*/
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typedef struct AVCIExy {
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AVRational x, y;
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} AVCIExy;
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/**
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* Struct defining the red, green, and blue primary locations in terms of CIE
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* 1931 chromaticity x and y.
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*/
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typedef struct AVPrimaryCoefficients {
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AVCIExy r, g, b;
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} AVPrimaryCoefficients;
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/**
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* Struct defining white point location in terms of CIE 1931 chromaticity x
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* and y.
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*/
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typedef AVCIExy AVWhitepointCoefficients;
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/**
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* Struct that contains both white point location and primaries location, providing
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* the complete description of a color gamut.
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*/
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typedef struct AVColorPrimariesDesc {
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AVWhitepointCoefficients wp;
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AVPrimaryCoefficients prim;
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} AVColorPrimariesDesc;
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/**
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* Retrieves the Luma coefficients necessary to construct a conversion matrix
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* from an enum constant describing the colorspace.
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* @param csp An enum constant indicating YUV or similar colorspace.
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* @return The Luma coefficients associated with that colorspace, or NULL
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* if the constant is unknown to libavutil.
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*/
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const AVLumaCoefficients *av_csp_luma_coeffs_from_avcsp(enum AVColorSpace csp);
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/**
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* Retrieves a complete gamut description from an enum constant describing the
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* color primaries.
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* @param prm An enum constant indicating primaries
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* @return A description of the colorspace gamut associated with that enum
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* constant, or NULL if the constant is unknown to libavutil.
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*/
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const AVColorPrimariesDesc *av_csp_primaries_desc_from_id(enum AVColorPrimaries prm);
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/**
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* Detects which enum AVColorPrimaries constant corresponds to the given complete
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* gamut description.
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* @see enum AVColorPrimaries
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* @param prm A description of the colorspace gamut
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* @return The enum constant associated with this gamut, or
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* AVCOL_PRI_UNSPECIFIED if no clear match can be idenitified.
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*/
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enum AVColorPrimaries av_csp_primaries_id_from_desc(const AVColorPrimariesDesc *prm);
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/**
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* @}
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*/
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#endif /* AVUTIL_CSP_H */
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