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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;
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;
gdouble gst_video_color_transfer_encode (GstVideoTransferFunction func, gdouble val);
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;
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"
gboolean gst_video_colorimetry_matches (const GstVideoColorimetry *cinfo, const gchar *color);
gboolean gst_video_colorimetry_from_string (GstVideoColorimetry *cinfo, const gchar *color);
gchar * gst_video_colorimetry_to_string (const GstVideoColorimetry *cinfo);
gboolean gst_video_colorimetry_is_equal (const GstVideoColorimetry *cinfo, const GstVideoColorimetry *other);
/* compute offset and scale */
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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