2 * This file is part of FFmpeg.
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 #include "dynamic_hdr10_plus.h"
21 static const uint8_t usa_country_code = 0xB5;
22 static const uint16_t smpte_provider_code = 0x003C;
23 static const uint16_t smpte2094_40_provider_oriented_code = 0x0001;
24 static const uint16_t smpte2094_40_application_identifier = 0x04;
25 static const int64_t luminance_den = 1;
26 static const int32_t peak_luminance_den = 15;
27 static const int64_t rgb_den = 100000;
28 static const int32_t fraction_pixel_den = 1000;
29 static const int32_t knee_point_den = 4095;
30 static const int32_t bezier_anchor_den = 1023;
31 static const int32_t saturation_weight_den = 8;
33 int ff_parse_itu_t_t35_to_dynamic_hdr10_plus(GetBitContext *gb, AVDynamicHDRPlus *s)
36 return AVERROR(ENOMEM);
38 s->application_version = get_bits(gb, 8);
40 if (get_bits_left(gb) < 2)
41 return AVERROR_INVALIDDATA;
42 s->num_windows = get_bits(gb, 2);
44 if (s->num_windows < 1 || s->num_windows > 3) {
45 return AVERROR_INVALIDDATA;
48 if (get_bits_left(gb) < ((19 * 8 + 1) * (s->num_windows - 1)))
49 return AVERROR_INVALIDDATA;
51 for (int w = 1; w < s->num_windows; w++) {
52 // The corners are set to absolute coordinates here. They should be
53 // converted to the relative coordinates (in [0, 1]) in the decoder.
54 AVHDRPlusColorTransformParams *params = &s->params[w];
55 params->window_upper_left_corner_x =
56 (AVRational){get_bits(gb, 16), 1};
57 params->window_upper_left_corner_y =
58 (AVRational){get_bits(gb, 16), 1};
59 params->window_lower_right_corner_x =
60 (AVRational){get_bits(gb, 16), 1};
61 params->window_lower_right_corner_y =
62 (AVRational){get_bits(gb, 16), 1};
64 params->center_of_ellipse_x = get_bits(gb, 16);
65 params->center_of_ellipse_y = get_bits(gb, 16);
66 params->rotation_angle = get_bits(gb, 8);
67 params->semimajor_axis_internal_ellipse = get_bits(gb, 16);
68 params->semimajor_axis_external_ellipse = get_bits(gb, 16);
69 params->semiminor_axis_external_ellipse = get_bits(gb, 16);
70 params->overlap_process_option = get_bits1(gb);
73 if (get_bits_left(gb) < 28)
74 return AVERROR(EINVAL);
76 s->targeted_system_display_maximum_luminance =
77 (AVRational){get_bits_long(gb, 27), luminance_den};
78 s->targeted_system_display_actual_peak_luminance_flag = get_bits1(gb);
80 if (s->targeted_system_display_actual_peak_luminance_flag) {
82 if (get_bits_left(gb) < 10)
83 return AVERROR(EINVAL);
84 rows = get_bits(gb, 5);
85 cols = get_bits(gb, 5);
86 if (((rows < 2) || (rows > 25)) || ((cols < 2) || (cols > 25))) {
87 return AVERROR_INVALIDDATA;
89 s->num_rows_targeted_system_display_actual_peak_luminance = rows;
90 s->num_cols_targeted_system_display_actual_peak_luminance = cols;
92 if (get_bits_left(gb) < (rows * cols * 4))
93 return AVERROR(EINVAL);
95 for (int i = 0; i < rows; i++) {
96 for (int j = 0; j < cols; j++) {
97 s->targeted_system_display_actual_peak_luminance[i][j] =
98 (AVRational){get_bits(gb, 4), peak_luminance_den};
102 for (int w = 0; w < s->num_windows; w++) {
103 AVHDRPlusColorTransformParams *params = &s->params[w];
104 if (get_bits_left(gb) < (3 * 17 + 17 + 4))
105 return AVERROR(EINVAL);
107 for (int i = 0; i < 3; i++) {
109 (AVRational){get_bits(gb, 17), rgb_den};
111 params->average_maxrgb =
112 (AVRational){get_bits(gb, 17), rgb_den};
113 params->num_distribution_maxrgb_percentiles = get_bits(gb, 4);
115 if (get_bits_left(gb) <
116 (params->num_distribution_maxrgb_percentiles * 24))
117 return AVERROR(EINVAL);
119 for (int i = 0; i < params->num_distribution_maxrgb_percentiles; i++) {
120 params->distribution_maxrgb[i].percentage = get_bits(gb, 7);
121 params->distribution_maxrgb[i].percentile =
122 (AVRational){get_bits(gb, 17), rgb_den};
125 if (get_bits_left(gb) < 10)
126 return AVERROR(EINVAL);
128 params->fraction_bright_pixels = (AVRational){get_bits(gb, 10), fraction_pixel_den};
130 if (get_bits_left(gb) < 1)
131 return AVERROR(EINVAL);
132 s->mastering_display_actual_peak_luminance_flag = get_bits1(gb);
133 if (s->mastering_display_actual_peak_luminance_flag) {
135 if (get_bits_left(gb) < 10)
136 return AVERROR(EINVAL);
137 rows = get_bits(gb, 5);
138 cols = get_bits(gb, 5);
139 if (((rows < 2) || (rows > 25)) || ((cols < 2) || (cols > 25))) {
140 return AVERROR_INVALIDDATA;
142 s->num_rows_mastering_display_actual_peak_luminance = rows;
143 s->num_cols_mastering_display_actual_peak_luminance = cols;
145 if (get_bits_left(gb) < (rows * cols * 4))
146 return AVERROR(EINVAL);
148 for (int i = 0; i < rows; i++) {
149 for (int j = 0; j < cols; j++) {
150 s->mastering_display_actual_peak_luminance[i][j] =
151 (AVRational){get_bits(gb, 4), peak_luminance_den};
156 for (int w = 0; w < s->num_windows; w++) {
157 AVHDRPlusColorTransformParams *params = &s->params[w];
158 if (get_bits_left(gb) < 1)
159 return AVERROR(EINVAL);
161 params->tone_mapping_flag = get_bits1(gb);
162 if (params->tone_mapping_flag) {
163 if (get_bits_left(gb) < 28)
164 return AVERROR(EINVAL);
166 params->knee_point_x =
167 (AVRational){get_bits(gb, 12), knee_point_den};
168 params->knee_point_y =
169 (AVRational){get_bits(gb, 12), knee_point_den};
170 params->num_bezier_curve_anchors = get_bits(gb, 4);
172 if (get_bits_left(gb) < (params->num_bezier_curve_anchors * 10))
173 return AVERROR(EINVAL);
175 for (int i = 0; i < params->num_bezier_curve_anchors; i++) {
176 params->bezier_curve_anchors[i] =
177 (AVRational){get_bits(gb, 10), bezier_anchor_den};
181 if (get_bits_left(gb) < 1)
182 return AVERROR(EINVAL);
183 params->color_saturation_mapping_flag = get_bits1(gb);
184 if (params->color_saturation_mapping_flag) {
185 if (get_bits_left(gb) < 6)
186 return AVERROR(EINVAL);
187 params->color_saturation_weight =
188 (AVRational){get_bits(gb, 6), saturation_weight_den};
192 skip_bits(gb, get_bits_left(gb));