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2ed64cad6a
SMPTE 170M and 240M use the same RGB and white point coordinates and therefore both primaries can be considered functionally equivalent. Also, some transfer functions have different name but equal gamma functions. Adding another colorimetry compare function to deal with thoes cases at once Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2765>
315 lines
12 KiB
C
315 lines
12 KiB
C
/* GStreamer
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* Copyright (C) <2011> Wim Taymans <wim.taymans@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_VIDEO_COLOR_H__
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#define __GST_VIDEO_COLOR_H__
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#include <gst/gst.h>
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#include <gst/video/video-format.h>
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G_BEGIN_DECLS
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/**
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* GstVideoColorRange:
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* @GST_VIDEO_COLOR_RANGE_UNKNOWN: unknown range
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* @GST_VIDEO_COLOR_RANGE_0_255: [0..255] for 8 bit components
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* @GST_VIDEO_COLOR_RANGE_16_235: [16..235] for 8 bit components. Chroma has
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* [16..240] range.
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*
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* Possible color range values. These constants are defined for 8 bit color
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* values and can be scaled for other bit depths.
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*/
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typedef enum {
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GST_VIDEO_COLOR_RANGE_UNKNOWN = 0,
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GST_VIDEO_COLOR_RANGE_0_255,
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GST_VIDEO_COLOR_RANGE_16_235
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} GstVideoColorRange;
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/**
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* GstVideoColorMatrix:
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* @GST_VIDEO_COLOR_MATRIX_UNKNOWN: unknown matrix
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* @GST_VIDEO_COLOR_MATRIX_RGB: identity matrix. Order of coefficients is
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* actually GBR, also IEC 61966-2-1 (sRGB)
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* @GST_VIDEO_COLOR_MATRIX_FCC: FCC Title 47 Code of Federal Regulations 73.682 (a)(20)
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* @GST_VIDEO_COLOR_MATRIX_BT709: ITU-R BT.709 color matrix, also ITU-R BT1361
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* / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
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* @GST_VIDEO_COLOR_MATRIX_BT601: ITU-R BT.601 color matrix, also SMPTE170M / ITU-R BT1358 525 / ITU-R BT1700 NTSC
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* @GST_VIDEO_COLOR_MATRIX_SMPTE240M: SMPTE 240M color matrix
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* @GST_VIDEO_COLOR_MATRIX_BT2020: ITU-R BT.2020 color matrix. Since: 1.6
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*
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* The color matrix is used to convert between Y'PbPr and
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* non-linear RGB (R'G'B')
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*/
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typedef enum {
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GST_VIDEO_COLOR_MATRIX_UNKNOWN = 0,
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GST_VIDEO_COLOR_MATRIX_RGB,
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GST_VIDEO_COLOR_MATRIX_FCC,
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GST_VIDEO_COLOR_MATRIX_BT709,
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GST_VIDEO_COLOR_MATRIX_BT601,
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GST_VIDEO_COLOR_MATRIX_SMPTE240M,
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GST_VIDEO_COLOR_MATRIX_BT2020
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} GstVideoColorMatrix;
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GST_VIDEO_API
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gboolean gst_video_color_matrix_get_Kr_Kb (GstVideoColorMatrix matrix, gdouble * Kr, gdouble * Kb);
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/**
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* GstVideoTransferFunction:
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* @GST_VIDEO_TRANSFER_UNKNOWN: unknown transfer function
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* @GST_VIDEO_TRANSFER_GAMMA10: linear RGB, gamma 1.0 curve
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* @GST_VIDEO_TRANSFER_GAMMA18: Gamma 1.8 curve
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* @GST_VIDEO_TRANSFER_GAMMA20: Gamma 2.0 curve
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* @GST_VIDEO_TRANSFER_GAMMA22: Gamma 2.2 curve
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* @GST_VIDEO_TRANSFER_BT709: Gamma 2.2 curve with a linear segment in the lower
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* range, also ITU-R BT470M / ITU-R BT1700 625 PAL &
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* SECAM / ITU-R BT1361
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* @GST_VIDEO_TRANSFER_SMPTE240M: Gamma 2.2 curve with a linear segment in the
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* lower range
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* @GST_VIDEO_TRANSFER_SRGB: Gamma 2.4 curve with a linear segment in the lower
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* range. IEC 61966-2-1 (sRGB or sYCC)
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* @GST_VIDEO_TRANSFER_GAMMA28: Gamma 2.8 curve, also ITU-R BT470BG
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* @GST_VIDEO_TRANSFER_LOG100: Logarithmic transfer characteristic
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* 100:1 range
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* @GST_VIDEO_TRANSFER_LOG316: Logarithmic transfer characteristic
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* 316.22777:1 range (100 * sqrt(10) : 1)
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* @GST_VIDEO_TRANSFER_BT2020_12: Gamma 2.2 curve with a linear segment in the lower
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* range. Used for BT.2020 with 12 bits per
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* component. Since: 1.6
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* @GST_VIDEO_TRANSFER_ADOBERGB: Gamma 2.19921875. Since: 1.8
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* @GST_VIDEO_TRANSFER_BT2020_10: Rec. ITU-R BT.2020-2 with 10 bits per component.
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* (functionally the same as the values
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* GST_VIDEO_TRANSFER_BT709 and GST_VIDEO_TRANSFER_BT601).
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* Since: 1.18
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* @GST_VIDEO_TRANSFER_SMPTE2084: SMPTE ST 2084 for 10, 12, 14, and 16-bit systems.
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* Known as perceptual quantization (PQ)
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* Since: 1.18
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* @GST_VIDEO_TRANSFER_ARIB_STD_B67: Association of Radio Industries and Businesses (ARIB)
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* STD-B67 and Rec. ITU-R BT.2100-1 hybrid loggamma (HLG) system
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* Since: 1.18
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* @GST_VIDEO_TRANSFER_BT601: also known as SMPTE170M / ITU-R BT1358 525 or 625 / ITU-R BT1700 NTSC
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* Functionally the same as the values
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* GST_VIDEO_TRANSFER_BT709, and GST_VIDEO_TRANSFER_BT2020_10.
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* Since: 1.18
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*
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* The video transfer function defines the formula for converting between
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* non-linear RGB (R'G'B') and linear RGB
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*/
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typedef enum {
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GST_VIDEO_TRANSFER_UNKNOWN = 0,
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GST_VIDEO_TRANSFER_GAMMA10,
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GST_VIDEO_TRANSFER_GAMMA18,
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GST_VIDEO_TRANSFER_GAMMA20,
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GST_VIDEO_TRANSFER_GAMMA22,
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GST_VIDEO_TRANSFER_BT709,
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GST_VIDEO_TRANSFER_SMPTE240M,
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GST_VIDEO_TRANSFER_SRGB,
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GST_VIDEO_TRANSFER_GAMMA28,
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GST_VIDEO_TRANSFER_LOG100,
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GST_VIDEO_TRANSFER_LOG316,
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GST_VIDEO_TRANSFER_BT2020_12,
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GST_VIDEO_TRANSFER_ADOBERGB,
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GST_VIDEO_TRANSFER_BT2020_10,
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GST_VIDEO_TRANSFER_SMPTE2084,
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GST_VIDEO_TRANSFER_ARIB_STD_B67,
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/**
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* GST_VIDEO_TRANSFER_BT601:
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*
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* also known as SMPTE170M / ITU-R BT1358 525 or 625 / ITU-R BT1700 NTSC
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*
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* Since: 1.18
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*/
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GST_VIDEO_TRANSFER_BT601
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} GstVideoTransferFunction;
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GST_VIDEO_DEPRECATED_FOR(gst_video_transfer_function_encode)
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gdouble gst_video_color_transfer_encode (GstVideoTransferFunction func, gdouble val);
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GST_VIDEO_API
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gdouble gst_video_transfer_function_encode (GstVideoTransferFunction func, gdouble val);
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GST_VIDEO_DEPRECATED_FOR(gst_video_transfer_function_decode)
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gdouble gst_video_color_transfer_decode (GstVideoTransferFunction func, gdouble val);
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GST_VIDEO_API
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gdouble gst_video_transfer_function_decode (GstVideoTransferFunction func, gdouble val);
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/**
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* GstVideoColorPrimaries:
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* @GST_VIDEO_COLOR_PRIMARIES_UNKNOWN: unknown color primaries
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* @GST_VIDEO_COLOR_PRIMARIES_BT709: BT709 primaries, also ITU-R BT1361 / IEC
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* 61966-2-4 / SMPTE RP177 Annex B
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* @GST_VIDEO_COLOR_PRIMARIES_BT470M: BT470M primaries, also FCC Title 47 Code
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* of Federal Regulations 73.682 (a)(20)
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* @GST_VIDEO_COLOR_PRIMARIES_BT470BG: BT470BG primaries, also ITU-R BT601-6
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* 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
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* @GST_VIDEO_COLOR_PRIMARIES_SMPTE170M: SMPTE170M primaries, also ITU-R
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* BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
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* @GST_VIDEO_COLOR_PRIMARIES_SMPTE240M: SMPTE240M primaries
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* @GST_VIDEO_COLOR_PRIMARIES_FILM: Generic film (colour filters using
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* Illuminant C)
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* @GST_VIDEO_COLOR_PRIMARIES_BT2020: ITU-R BT2020 primaries. Since: 1.6
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* @GST_VIDEO_COLOR_PRIMARIES_ADOBERGB: Adobe RGB primaries. Since: 1.8
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* @GST_VIDEO_COLOR_PRIMARIES_SMPTEST428: SMPTE ST 428 primaries (CIE 1931
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* XYZ). Since: 1.16
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* @GST_VIDEO_COLOR_PRIMARIES_SMPTERP431: SMPTE RP 431 primaries (ST 431-2
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* (2011) / DCI P3). Since: 1.16
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* @GST_VIDEO_COLOR_PRIMARIES_SMPTEEG432: SMPTE EG 432 primaries (ST 432-1
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* (2010) / P3 D65). Since: 1.16
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* @GST_VIDEO_COLOR_PRIMARIES_EBU3213: EBU 3213 primaries (JEDEC P22
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* phosphors). Since: 1.16
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*
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* The color primaries define the how to transform linear RGB values to and from
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* the CIE XYZ colorspace.
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*/
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typedef enum {
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GST_VIDEO_COLOR_PRIMARIES_UNKNOWN = 0,
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GST_VIDEO_COLOR_PRIMARIES_BT709,
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GST_VIDEO_COLOR_PRIMARIES_BT470M,
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GST_VIDEO_COLOR_PRIMARIES_BT470BG,
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GST_VIDEO_COLOR_PRIMARIES_SMPTE170M,
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GST_VIDEO_COLOR_PRIMARIES_SMPTE240M,
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GST_VIDEO_COLOR_PRIMARIES_FILM,
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GST_VIDEO_COLOR_PRIMARIES_BT2020,
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GST_VIDEO_COLOR_PRIMARIES_ADOBERGB,
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GST_VIDEO_COLOR_PRIMARIES_SMPTEST428,
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GST_VIDEO_COLOR_PRIMARIES_SMPTERP431,
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GST_VIDEO_COLOR_PRIMARIES_SMPTEEG432,
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GST_VIDEO_COLOR_PRIMARIES_EBU3213,
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} GstVideoColorPrimaries;
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/**
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* GstVideoColorPrimariesInfo:
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* @primaries: a #GstVideoColorPrimaries
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* @Wx: reference white x coordinate
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* @Wy: reference white y coordinate
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* @Rx: red x coordinate
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* @Ry: red y coordinate
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* @Gx: green x coordinate
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* @Gy: green y coordinate
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* @Bx: blue x coordinate
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* @By: blue y coordinate
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*
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* Structure describing the chromaticity coordinates of an RGB system. These
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* values can be used to construct a matrix to transform RGB to and from the
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* XYZ colorspace.
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*
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* Since: 1.6
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*/
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typedef struct {
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GstVideoColorPrimaries primaries;
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gdouble Wx, Wy;
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gdouble Rx, Ry;
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gdouble Gx, Gy;
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gdouble Bx, By;
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} GstVideoColorPrimariesInfo;
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GST_VIDEO_API
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const GstVideoColorPrimariesInfo *
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gst_video_color_primaries_get_info (GstVideoColorPrimaries primaries);
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GST_VIDEO_API
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gboolean gst_video_color_primaries_is_equivalent (GstVideoColorPrimaries primaries,
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GstVideoColorPrimaries other);
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/**
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* GstVideoColorimetry:
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* @range: the color range. This is the valid range for the samples.
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* It is used to convert the samples to Y'PbPr values.
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* @matrix: the color matrix. Used to convert between Y'PbPr and
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* non-linear RGB (R'G'B')
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* @transfer: the transfer function. used to convert between R'G'B' and RGB
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* @primaries: color primaries. used to convert between R'G'B' and CIE XYZ
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*
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* Structure describing the color info.
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*/
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typedef struct {
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GstVideoColorRange range;
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GstVideoColorMatrix matrix;
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GstVideoTransferFunction transfer;
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GstVideoColorPrimaries primaries;
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} GstVideoColorimetry;
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/* predefined colorimetry */
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#define GST_VIDEO_COLORIMETRY_BT601 "bt601"
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#define GST_VIDEO_COLORIMETRY_BT709 "bt709"
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#define GST_VIDEO_COLORIMETRY_SMPTE240M "smpte240m"
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#define GST_VIDEO_COLORIMETRY_SRGB "sRGB"
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#define GST_VIDEO_COLORIMETRY_BT2020 "bt2020"
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#define GST_VIDEO_COLORIMETRY_BT2020_10 "bt2020-10"
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#define GST_VIDEO_COLORIMETRY_BT2100_PQ "bt2100-pq"
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#define GST_VIDEO_COLORIMETRY_BT2100_HLG "bt2100-hlg"
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GST_VIDEO_API
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gboolean gst_video_colorimetry_matches (const GstVideoColorimetry *cinfo, const gchar *color);
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GST_VIDEO_API
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gboolean gst_video_colorimetry_from_string (GstVideoColorimetry *cinfo, const gchar *color);
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GST_VIDEO_API
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gchar * gst_video_colorimetry_to_string (const GstVideoColorimetry *cinfo);
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GST_VIDEO_API
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gboolean gst_video_colorimetry_is_equal (const GstVideoColorimetry *cinfo, const GstVideoColorimetry *other);
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GST_VIDEO_API
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gboolean gst_video_colorimetry_is_equivalent (const GstVideoColorimetry *cinfo,
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guint bitdepth,
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const GstVideoColorimetry *other,
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guint other_bitdepth);
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/* compute offset and scale */
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GST_VIDEO_API
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void gst_video_color_range_offsets (GstVideoColorRange range,
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const GstVideoFormatInfo *info,
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gint offset[GST_VIDEO_MAX_COMPONENTS],
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gint scale[GST_VIDEO_MAX_COMPONENTS]);
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/* conversion between GStreamer color{matrix,transfer,primaries} enum and
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* values defined by ISO/IEC 23001-8 and ITU-T H.273 specification.
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* Also H264 and H265 specifications follow the color{matrix,transfer,primaries}
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* values */
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GST_VIDEO_API
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guint gst_video_color_matrix_to_iso (GstVideoColorMatrix matrix);
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GST_VIDEO_API
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guint gst_video_transfer_function_to_iso (GstVideoTransferFunction func);
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GST_VIDEO_API
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guint gst_video_color_primaries_to_iso (GstVideoColorPrimaries primaries);
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GST_VIDEO_API
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GstVideoColorMatrix gst_video_color_matrix_from_iso (guint value);
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GST_VIDEO_API
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GstVideoTransferFunction gst_video_transfer_function_from_iso (guint value);
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GST_VIDEO_API
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GstVideoColorPrimaries gst_video_color_primaries_from_iso (guint value);
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GST_VIDEO_API
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gboolean gst_video_transfer_function_is_equivalent (GstVideoTransferFunction from_func,
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guint from_bpp,
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GstVideoTransferFunction to_func,
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guint to_bpp);
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G_END_DECLS
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#endif /* __GST_VIDEO_COLOR_H__ */
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