FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/colorspace.c
Date: 2024-04-19 07:31:02
Exec Total Coverage
Lines: 21 103 20.4%
Functions: 2 7 28.6%
Branches: 4 40 10.0%

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1 /*
2 * Copyright (c) 2016 Ronald S. Bultje <rsbultje@gmail.com>
3 * This file is part of FFmpeg.
4 *
5 * FFmpeg is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
9 *
10 * FFmpeg is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with FFmpeg; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20 #include "libavutil/frame.h"
21 #include "libavutil/mastering_display_metadata.h"
22 #include "libavutil/pixdesc.h"
23
24 #include "colorspace.h"
25
26
27 void ff_matrix_invert_3x3(const double in[3][3], double out[3][3])
28 {
29 double m00 = in[0][0], m01 = in[0][1], m02 = in[0][2],
30 m10 = in[1][0], m11 = in[1][1], m12 = in[1][2],
31 m20 = in[2][0], m21 = in[2][1], m22 = in[2][2];
32 int i, j;
33 double det;
34
35 out[0][0] = (m11 * m22 - m21 * m12);
36 out[0][1] = -(m01 * m22 - m21 * m02);
37 out[0][2] = (m01 * m12 - m11 * m02);
38 out[1][0] = -(m10 * m22 - m20 * m12);
39 out[1][1] = (m00 * m22 - m20 * m02);
40 out[1][2] = -(m00 * m12 - m10 * m02);
41 out[2][0] = (m10 * m21 - m20 * m11);
42 out[2][1] = -(m00 * m21 - m20 * m01);
43 out[2][2] = (m00 * m11 - m10 * m01);
44
45 det = m00 * out[0][0] + m10 * out[0][1] + m20 * out[0][2];
46 det = 1.0 / det;
47
48 for (i = 0; i < 3; i++) {
49 for (j = 0; j < 3; j++)
50 out[i][j] *= det;
51 }
52 }
53
54 void ff_matrix_mul_3x3(double dst[3][3],
55 const double src1[3][3], const double src2[3][3])
56 {
57 int m, n;
58
59 for (m = 0; m < 3; m++)
60 for (n = 0; n < 3; n++)
61 dst[m][n] = src2[m][0] * src1[0][n] +
62 src2[m][1] * src1[1][n] +
63 src2[m][2] * src1[2][n];
64 }
65
66 154163 void ff_matrix_mul_3x3_vec(double dst[3], const double vec[3], const double mat[3][3])
67 {
68 int m;
69
70
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616652 for (m = 0; m < 3; m++)
71 462489 dst[m] = vec[0] * mat[m][0] +
72 462489 vec[1] * mat[m][1] +
73 462489 vec[2] * mat[m][2];
74 154163 }
75
76 /*
77 * see e.g. http://www.brucelindbloom.com/index.html?Eqn_RGB_XYZ_Matrix.html
78 */
79 void ff_fill_rgb2xyz_table(const AVPrimaryCoefficients *coeffs,
80 const AVWhitepointCoefficients *wp,
81 double rgb2xyz[3][3])
82 {
83 double i[3][3], sr, sg, sb, zw;
84 double xr = av_q2d(coeffs->r.x), yr = av_q2d(coeffs->r.y);
85 double xg = av_q2d(coeffs->g.x), yg = av_q2d(coeffs->g.y);
86 double xb = av_q2d(coeffs->b.x), yb = av_q2d(coeffs->b.y);
87 double xw = av_q2d(wp->x), yw = av_q2d(wp->y);
88
89 rgb2xyz[0][0] = xr / yr;
90 rgb2xyz[0][1] = xg / yg;
91 rgb2xyz[0][2] = xb / yb;
92 rgb2xyz[1][0] = rgb2xyz[1][1] = rgb2xyz[1][2] = 1.0;
93 rgb2xyz[2][0] = (1.0 - xr - yr) / yr;
94 rgb2xyz[2][1] = (1.0 - xg - yg) / yg;
95 rgb2xyz[2][2] = (1.0 - xb - yb) / yb;
96 ff_matrix_invert_3x3(rgb2xyz, i);
97 zw = 1.0 - xw - yw;
98 sr = i[0][0] * xw + i[0][1] * yw + i[0][2] * zw;
99 sg = i[1][0] * xw + i[1][1] * yw + i[1][2] * zw;
100 sb = i[2][0] * xw + i[2][1] * yw + i[2][2] * zw;
101 rgb2xyz[0][0] *= sr;
102 rgb2xyz[0][1] *= sg;
103 rgb2xyz[0][2] *= sb;
104 rgb2xyz[1][0] *= sr;
105 rgb2xyz[1][1] *= sg;
106 rgb2xyz[1][2] *= sb;
107 rgb2xyz[2][0] *= sr;
108 rgb2xyz[2][1] *= sg;
109 rgb2xyz[2][2] *= sb;
110 }
111 static const double ycgco_matrix[3][3] =
112 {
113 { 0.25, 0.5, 0.25 },
114 { -0.25, 0.5, -0.25 },
115 { 0.5, 0, -0.5 },
116 };
117
118 static const double gbr_matrix[3][3] =
119 {
120 { 0, 1, 0 },
121 { 0, -0.5, 0.5 },
122 { 0.5, -0.5, 0 },
123 };
124
125 10892 void ff_fill_rgb2yuv_table(const AVLumaCoefficients *coeffs,
126 double rgb2yuv[3][3])
127 {
128 double bscale, rscale;
129 10892 double cr = av_q2d(coeffs->cr), cg = av_q2d(coeffs->cg), cb = av_q2d(coeffs->cb);
130
131 // special ycgco matrix
132
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10892 if (cr == 0.25 && cg == 0.5 && cb == 0.25) {
133 memcpy(rgb2yuv, ycgco_matrix, sizeof(double) * 9);
134 return;
135
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10892 } else if (cr == 1 && cg == 1 && cb == 1) {
136 memcpy(rgb2yuv, gbr_matrix, sizeof(double) * 9);
137 return;
138 }
139
140 10892 rgb2yuv[0][0] = cr;
141 10892 rgb2yuv[0][1] = cg;
142 10892 rgb2yuv[0][2] = cb;
143 10892 bscale = 0.5 / (cb - 1.0);
144 10892 rscale = 0.5 / (cr - 1.0);
145 10892 rgb2yuv[1][0] = bscale * cr;
146 10892 rgb2yuv[1][1] = bscale * cg;
147 10892 rgb2yuv[1][2] = 0.5;
148 10892 rgb2yuv[2][0] = 0.5;
149 10892 rgb2yuv[2][1] = rscale * cg;
150 10892 rgb2yuv[2][2] = rscale * cb;
151 }
152
153 double ff_determine_signal_peak(AVFrame *in)
154 {
155 AVFrameSideData *sd = av_frame_get_side_data(in, AV_FRAME_DATA_CONTENT_LIGHT_LEVEL);
156 double peak = 0;
157
158 if (sd) {
159 AVContentLightMetadata *clm = (AVContentLightMetadata *)sd->data;
160 peak = clm->MaxCLL / REFERENCE_WHITE;
161 }
162
163 sd = av_frame_get_side_data(in, AV_FRAME_DATA_MASTERING_DISPLAY_METADATA);
164 if (!peak && sd) {
165 AVMasteringDisplayMetadata *metadata = (AVMasteringDisplayMetadata *)sd->data;
166 if (metadata->has_luminance)
167 peak = av_q2d(metadata->max_luminance) / REFERENCE_WHITE;
168 }
169
170 // For untagged source, use peak of 10000 if SMPTE ST.2084
171 // otherwise assume HLG with reference display peak 1000.
172 if (!peak)
173 peak = in->color_trc == AVCOL_TRC_SMPTE2084 ? 100.0f : 10.0f;
174
175 return peak;
176 }
177
178 void ff_update_hdr_metadata(AVFrame *in, double peak)
179 {
180 AVFrameSideData *sd = av_frame_get_side_data(in, AV_FRAME_DATA_CONTENT_LIGHT_LEVEL);
181
182 if (sd) {
183 AVContentLightMetadata *clm = (AVContentLightMetadata *)sd->data;
184 clm->MaxCLL = (unsigned)(peak * REFERENCE_WHITE);
185 }
186
187 sd = av_frame_get_side_data(in, AV_FRAME_DATA_MASTERING_DISPLAY_METADATA);
188 if (sd) {
189 AVMasteringDisplayMetadata *metadata = (AVMasteringDisplayMetadata *)sd->data;
190 if (metadata->has_luminance)
191 metadata->max_luminance = av_d2q(peak * REFERENCE_WHITE, 10000);
192 }
193 }
194