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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 | 155011 | 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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620044 | for (m = 0; m < 3; m++) |
| 71 | 465033 | dst[m] = vec[0] * mat[m][0] + | |
| 72 | 465033 | vec[1] * mat[m][1] + | |
| 73 | 465033 | vec[2] * mat[m][2]; | |
| 74 | 155011 | } | |
| 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 | 11726 | void ff_fill_rgb2yuv_table(const AVLumaCoefficients *coeffs, | |
| 126 | double rgb2yuv[3][3]) | ||
| 127 | { | ||
| 128 | double bscale, rscale; | ||
| 129 | 11726 | 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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11726 | 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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11726 | } else if (cr == 1 && cg == 1 && cb == 1) { |
| 136 | ✗ | memcpy(rgb2yuv, gbr_matrix, sizeof(double) * 9); | |
| 137 | ✗ | return; | |
| 138 | } | ||
| 139 | |||
| 140 | 11726 | rgb2yuv[0][0] = cr; | |
| 141 | 11726 | rgb2yuv[0][1] = cg; | |
| 142 | 11726 | rgb2yuv[0][2] = cb; | |
| 143 | 11726 | bscale = 0.5 / (cb - 1.0); | |
| 144 | 11726 | rscale = 0.5 / (cr - 1.0); | |
| 145 | 11726 | rgb2yuv[1][0] = bscale * cr; | |
| 146 | 11726 | rgb2yuv[1][1] = bscale * cg; | |
| 147 | 11726 | rgb2yuv[1][2] = 0.5; | |
| 148 | 11726 | rgb2yuv[2][0] = 0.5; | |
| 149 | 11726 | rgb2yuv[2][1] = rscale * cg; | |
| 150 | 11726 | 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 |