mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
106 lines
3.3 KiB
106 lines
3.3 KiB
/* |
|
* Copyright (c) 2016 Ronald S. Bultje <rsbultje@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_CSP_H |
|
#define AVUTIL_CSP_H |
|
|
|
#include "pixfmt.h" |
|
#include "rational.h" |
|
|
|
/** |
|
* @file Colorspace value utility functions for libavutil. |
|
* @author Ronald S. Bultje <rsbultje@gmail.com> |
|
* @author Leo Izen <leo.izen@gmail.com> |
|
* @defgroup lavu_math_csp Colorspace Utility |
|
* @ingroup lavu_math |
|
* @{ |
|
*/ |
|
|
|
/** |
|
* Struct containing luma coefficients to be used for RGB to YUV/YCoCg, or similar |
|
* calculations. |
|
*/ |
|
typedef struct AVLumaCoefficients { |
|
AVRational cr, cg, cb; |
|
} AVLumaCoefficients; |
|
|
|
/** |
|
* Struct containing chromaticity x and y values for the standard CIE 1931 |
|
* chromaticity definition. |
|
*/ |
|
typedef struct AVCIExy { |
|
AVRational x, y; |
|
} AVCIExy; |
|
|
|
/** |
|
* Struct defining the red, green, and blue primary locations in terms of CIE |
|
* 1931 chromaticity x and y. |
|
*/ |
|
typedef struct AVPrimaryCoefficients { |
|
AVCIExy r, g, b; |
|
} AVPrimaryCoefficients; |
|
|
|
/** |
|
* Struct defining white point location in terms of CIE 1931 chromaticity x |
|
* and y. |
|
*/ |
|
typedef AVCIExy AVWhitepointCoefficients; |
|
|
|
/** |
|
* Struct that contains both white point location and primaries location, providing |
|
* the complete description of a color gamut. |
|
*/ |
|
typedef struct AVColorPrimariesDesc { |
|
AVWhitepointCoefficients wp; |
|
AVPrimaryCoefficients prim; |
|
} AVColorPrimariesDesc; |
|
|
|
/** |
|
* Retrieves the Luma coefficients necessary to construct a conversion matrix |
|
* from an enum constant describing the colorspace. |
|
* @param csp An enum constant indicating YUV or similar colorspace. |
|
* @return The Luma coefficients associated with that colorspace, or NULL |
|
* if the constant is unknown to libavutil. |
|
*/ |
|
const AVLumaCoefficients *av_csp_luma_coeffs_from_avcsp(enum AVColorSpace csp); |
|
|
|
/** |
|
* Retrieves a complete gamut description from an enum constant describing the |
|
* color primaries. |
|
* @param prm An enum constant indicating primaries |
|
* @return A description of the colorspace gamut associated with that enum |
|
* constant, or NULL if the constant is unknown to libavutil. |
|
*/ |
|
const AVColorPrimariesDesc *av_csp_primaries_desc_from_id(enum AVColorPrimaries prm); |
|
|
|
/** |
|
* Detects which enum AVColorPrimaries constant corresponds to the given complete |
|
* gamut description. |
|
* @see enum AVColorPrimaries |
|
* @param prm A description of the colorspace gamut |
|
* @return The enum constant associated with this gamut, or |
|
* AVCOL_PRI_UNSPECIFIED if no clear match can be idenitified. |
|
*/ |
|
enum AVColorPrimaries av_csp_primaries_id_from_desc(const AVColorPrimariesDesc *prm); |
|
|
|
/** |
|
* @} |
|
*/ |
|
|
|
#endif /* AVUTIL_CSP_H */
|
|
|