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gstreamer/gst-libs/gst/video/video-color.h
Tim-Philipp Müller ae429de8f6 video: GST_EXPORT -> GST_VIDEO_API 
We need different export decorators for the different libs.
For now no actual change though, just rename before the release,
and add prelude headers to define the new decorator to GST_EXPORT.
2018-03-13 12:16:42 +00:00

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/* GStreamer
* Copyright (C) <2011> Wim Taymans <wim.taymans@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_VIDEO_COLOR_H__
#define __GST_VIDEO_COLOR_H__
#include <gst/gst.h>
#include <gst/video/video-format.h>
G_BEGIN_DECLS
/**
* GstVideoColorRange:
* @GST_VIDEO_COLOR_RANGE_UNKNOWN: unknown range
* @GST_VIDEO_COLOR_RANGE_0_255: [0..255] for 8 bit components
* @GST_VIDEO_COLOR_RANGE_16_235: [16..235] for 8 bit components. Chroma has
* [16..240] range.
*
* Possible color range values. These constants are defined for 8 bit color
* values and can be scaled for other bit depths.
*/
typedef enum {
GST_VIDEO_COLOR_RANGE_UNKNOWN = 0,
GST_VIDEO_COLOR_RANGE_0_255,
GST_VIDEO_COLOR_RANGE_16_235
} GstVideoColorRange;
/**
* GstVideoColorMatrix:
* @GST_VIDEO_COLOR_MATRIX_UNKNOWN: unknown matrix
* @GST_VIDEO_COLOR_MATRIX_RGB: identity matrix
* @GST_VIDEO_COLOR_MATRIX_FCC: FCC color matrix
* @GST_VIDEO_COLOR_MATRIX_BT709: ITU-R BT.709 color matrix
* @GST_VIDEO_COLOR_MATRIX_BT601: ITU-R BT.601 color matrix
* @GST_VIDEO_COLOR_MATRIX_SMPTE240M: SMPTE 240M color matrix
* @GST_VIDEO_COLOR_MATRIX_BT2020: ITU-R BT.2020 color matrix. Since: 1.6
*
* The color matrix is used to convert between Y'PbPr and
* non-linear RGB (R'G'B')
*/
typedef enum {
GST_VIDEO_COLOR_MATRIX_UNKNOWN = 0,
GST_VIDEO_COLOR_MATRIX_RGB,
GST_VIDEO_COLOR_MATRIX_FCC,
GST_VIDEO_COLOR_MATRIX_BT709,
GST_VIDEO_COLOR_MATRIX_BT601,
GST_VIDEO_COLOR_MATRIX_SMPTE240M,
GST_VIDEO_COLOR_MATRIX_BT2020
} GstVideoColorMatrix;
GST_VIDEO_API
gboolean gst_video_color_matrix_get_Kr_Kb (GstVideoColorMatrix matrix, gdouble * Kr, gdouble * Kb);
/**
* GstVideoTransferFunction:
* @GST_VIDEO_TRANSFER_UNKNOWN: unknown transfer function
* @GST_VIDEO_TRANSFER_GAMMA10: linear RGB, gamma 1.0 curve
* @GST_VIDEO_TRANSFER_GAMMA18: Gamma 1.8 curve
* @GST_VIDEO_TRANSFER_GAMMA20: Gamma 2.0 curve
* @GST_VIDEO_TRANSFER_GAMMA22: Gamma 2.2 curve
* @GST_VIDEO_TRANSFER_BT709: Gamma 2.2 curve with a linear segment in the lower
* range
* @GST_VIDEO_TRANSFER_SMPTE240M: Gamma 2.2 curve with a linear segment in the
* lower range
* @GST_VIDEO_TRANSFER_SRGB: Gamma 2.4 curve with a linear segment in the lower
* range
* @GST_VIDEO_TRANSFER_GAMMA28: Gamma 2.8 curve
* @GST_VIDEO_TRANSFER_LOG100: Logarithmic transfer characteristic
* 100:1 range
* @GST_VIDEO_TRANSFER_LOG316: Logarithmic transfer characteristic
* 316.22777:1 range
* @GST_VIDEO_TRANSFER_BT2020_12: Gamma 2.2 curve with a linear segment in the lower
* range. Used for BT.2020 with 12 bits per
* component. Since: 1.6
* @GST_VIDEO_TRANSFER_ADOBERGB: Gamma 2.19921875. Since: 1.8
*
* The video transfer function defines the formula for converting between
* non-linear RGB (R'G'B') and linear RGB
*/
typedef enum {
GST_VIDEO_TRANSFER_UNKNOWN = 0,
GST_VIDEO_TRANSFER_GAMMA10,
GST_VIDEO_TRANSFER_GAMMA18,
GST_VIDEO_TRANSFER_GAMMA20,
GST_VIDEO_TRANSFER_GAMMA22,
GST_VIDEO_TRANSFER_BT709,
GST_VIDEO_TRANSFER_SMPTE240M,
GST_VIDEO_TRANSFER_SRGB,
GST_VIDEO_TRANSFER_GAMMA28,
GST_VIDEO_TRANSFER_LOG100,
GST_VIDEO_TRANSFER_LOG316,
GST_VIDEO_TRANSFER_BT2020_12,
GST_VIDEO_TRANSFER_ADOBERGB
} GstVideoTransferFunction;
GST_VIDEO_API
gdouble gst_video_color_transfer_encode (GstVideoTransferFunction func, gdouble val);
GST_VIDEO_API
gdouble gst_video_color_transfer_decode (GstVideoTransferFunction func, gdouble val);
/**
* GstVideoColorPrimaries:
* @GST_VIDEO_COLOR_PRIMARIES_UNKNOWN: unknown color primaries
* @GST_VIDEO_COLOR_PRIMARIES_BT709: BT709 primaries
* @GST_VIDEO_COLOR_PRIMARIES_BT470M: BT470M primaries
* @GST_VIDEO_COLOR_PRIMARIES_BT470BG: BT470BG primaries
* @GST_VIDEO_COLOR_PRIMARIES_SMPTE170M: SMPTE170M primaries
* @GST_VIDEO_COLOR_PRIMARIES_SMPTE240M: SMPTE240M primaries
* @GST_VIDEO_COLOR_PRIMARIES_FILM: Generic film
* @GST_VIDEO_COLOR_PRIMARIES_BT2020: BT2020 primaries. Since: 1.6
* @GST_VIDEO_COLOR_PRIMARIES_ADOBERGB: Adobe RGB primaries. Since: 1.8
*
* The color primaries define the how to transform linear RGB values to and from
* the CIE XYZ colorspace.
*/
typedef enum {
GST_VIDEO_COLOR_PRIMARIES_UNKNOWN = 0,
GST_VIDEO_COLOR_PRIMARIES_BT709,
GST_VIDEO_COLOR_PRIMARIES_BT470M,
GST_VIDEO_COLOR_PRIMARIES_BT470BG,
GST_VIDEO_COLOR_PRIMARIES_SMPTE170M,
GST_VIDEO_COLOR_PRIMARIES_SMPTE240M,
GST_VIDEO_COLOR_PRIMARIES_FILM,
GST_VIDEO_COLOR_PRIMARIES_BT2020,
GST_VIDEO_COLOR_PRIMARIES_ADOBERGB
} GstVideoColorPrimaries;
/**
* GstVideoColorPrimariesInfo:
* @primaries: a #GstVideoColorPrimaries
* @Wx: reference white x coordinate
* @Wy: reference white y coordinate
* @Rx: red x coordinate
* @Ry: red y coordinate
* @Gx: green x coordinate
* @Gy: green y coordinate
* @Bx: blue x coordinate
* @By: blue y coordinate
*
* Structure describing the chromaticity coordinates of an RGB system. These
* values can be used to construct a matrix to transform RGB to and from the
* XYZ colorspace.
*
* Since: 1.6
*/
typedef struct {
GstVideoColorPrimaries primaries;
gdouble Wx, Wy;
gdouble Rx, Ry;
gdouble Gx, Gy;
gdouble Bx, By;
} GstVideoColorPrimariesInfo;
GST_VIDEO_API
const GstVideoColorPrimariesInfo *
gst_video_color_primaries_get_info (GstVideoColorPrimaries primaries);
/**
* GstVideoColorimetry:
* @range: the color range. This is the valid range for the samples.
* It is used to convert the samples to Y'PbPr values.
* @matrix: the color matrix. Used to convert between Y'PbPr and
* non-linear RGB (R'G'B')
* @transfer: the transfer function. used to convert between R'G'B' and RGB
* @primaries: color primaries. used to convert between R'G'B' and CIE XYZ
*
* Structure describing the color info.
*/
typedef struct {
GstVideoColorRange range;
GstVideoColorMatrix matrix;
GstVideoTransferFunction transfer;
GstVideoColorPrimaries primaries;
} GstVideoColorimetry;
/* predefined colorimetry */
#define GST_VIDEO_COLORIMETRY_BT601 "bt601"
#define GST_VIDEO_COLORIMETRY_BT709 "bt709"
#define GST_VIDEO_COLORIMETRY_SMPTE240M "smpte240m"
#define GST_VIDEO_COLORIMETRY_SRGB "sRGB"
#define GST_VIDEO_COLORIMETRY_BT2020 "bt2020"
GST_VIDEO_API
gboolean gst_video_colorimetry_matches (const GstVideoColorimetry *cinfo, const gchar *color);
GST_VIDEO_API
gboolean gst_video_colorimetry_from_string (GstVideoColorimetry *cinfo, const gchar *color);
GST_VIDEO_API
gchar * gst_video_colorimetry_to_string (const GstVideoColorimetry *cinfo);
GST_VIDEO_API
gboolean gst_video_colorimetry_is_equal (const GstVideoColorimetry *cinfo, const GstVideoColorimetry *other);
/* compute offset and scale */
GST_VIDEO_API
void gst_video_color_range_offsets (GstVideoColorRange range,
const GstVideoFormatInfo *info,
gint offset[GST_VIDEO_MAX_COMPONENTS],
gint scale[GST_VIDEO_MAX_COMPONENTS]);
G_END_DECLS
#endif /* __GST_VIDEO_COLOR_H__ */
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