summaryrefslogtreecommitdiff
path: root/libavutil/hdr_dynamic_metadata.h
blob: 2d72de56aecd858fa3cc1e54b3918a2ecad79108 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
/*
 * Copyright (c) 2018 Mohammad Izadi <moh.izadi at gmail.com>
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef AVUTIL_HDR_DYNAMIC_METADATA_H
#define AVUTIL_HDR_DYNAMIC_METADATA_H

#include "frame.h"
#include "rational.h"

/**
 * Option for overlapping elliptical pixel selectors in an image.
 */
enum AVHDRPlusOverlapProcessOption {
    AV_HDR_PLUS_OVERLAP_PROCESS_WEIGHTED_AVERAGING = 0,
    AV_HDR_PLUS_OVERLAP_PROCESS_LAYERING = 1,
};

/**
 * Represents the percentile at a specific percentage in
 * a distribution.
 */
typedef struct AVHDRPlusPercentile {
    /**
     * The percentage value corresponding to a specific percentile linearized
     * RGB value in the processing window in the scene. The value shall be in
     * the range of 0 to100, inclusive.
     */
    uint8_t percentage;

    /**
     * The linearized maxRGB value at a specific percentile in the processing
     * window in the scene. The value shall be in the range of 0 to 1, inclusive
     * and in multiples of 0.00001.
     */
    AVRational percentile;
} AVHDRPlusPercentile;

/**
 * Color transform parameters at a processing window in a dynamic metadata for
 * SMPTE 2094-40.
 */
typedef struct AVHDRPlusColorTransformParams {
    /**
     * The relative x coordinate of the top left pixel of the processing
     * window. The value shall be in the range of 0 and 1, inclusive and
     * in multiples of 1/(width of Picture - 1). The value 1 corresponds
     * to the absolute coordinate of width of Picture - 1. The value for
     * first processing window shall be 0.
     */
    AVRational window_upper_left_corner_x;

    /**
     * The relative y coordinate of the top left pixel of the processing
     * window. The value shall be in the range of 0 and 1, inclusive and
     * in multiples of 1/(height of Picture - 1). The value 1 corresponds
     * to the absolute coordinate of height of Picture - 1. The value for
     * first processing window shall be 0.
     */
    AVRational window_upper_left_corner_y;

    /**
     * The relative x coordinate of the bottom right pixel of the processing
     * window. The value shall be in the range of 0 and 1, inclusive and
     * in multiples of 1/(width of Picture - 1). The value 1 corresponds
     * to the absolute coordinate of width of Picture - 1. The value for
     * first processing window shall be 1.
     */
    AVRational window_lower_right_corner_x;

    /**
     * The relative y coordinate of the bottom right pixel of the processing
     * window. The value shall be in the range of 0 and 1, inclusive and
     * in multiples of 1/(height of Picture - 1). The value 1 corresponds
     * to the absolute coordinate of height of Picture - 1. The value for
     * first processing window shall be 1.
     */
    AVRational window_lower_right_corner_y;

    /**
     * The x coordinate of the center position of the concentric internal and
     * external ellipses of the elliptical pixel selector in the processing
     * window. The value shall be in the range of 0 to (width of Picture - 1),
     * inclusive and in multiples of 1 pixel.
     */
    uint16_t center_of_ellipse_x;

    /**
     * The y coordinate of the center position of the concentric internal and
     * external ellipses of the elliptical pixel selector in the processing
     * window. The value shall be in the range of 0 to (height of Picture - 1),
     * inclusive and in multiples of 1 pixel.
     */
    uint16_t center_of_ellipse_y;

    /**
     * The clockwise rotation angle in degree of arc with respect to the
     * positive direction of the x-axis of the concentric internal and external
     * ellipses of the elliptical pixel selector in the processing window. The
     * value shall be in the range of 0 to 180, inclusive and in multiples of 1.
     */
    uint8_t rotation_angle;

    /**
     * The semi-major axis value of the internal ellipse of the elliptical pixel
     * selector in amount of pixels in the processing window. The value shall be
     * in the range of 1 to 65535, inclusive and in multiples of 1 pixel.
     */
    uint16_t semimajor_axis_internal_ellipse;

    /**
     * The semi-major axis value of the external ellipse of the elliptical pixel
     * selector in amount of pixels in the processing window. The value
     * shall not be less than semimajor_axis_internal_ellipse of the current
     * processing window. The value shall be in the range of 1 to 65535,
     * inclusive and in multiples of 1 pixel.
     */
    uint16_t semimajor_axis_external_ellipse;

    /**
     * The semi-minor axis value of the external ellipse of the elliptical pixel
     * selector in amount of pixels in the processing window. The value shall be
     * in the range of 1 to 65535, inclusive and in multiples of 1 pixel.
     */
    uint16_t semiminor_axis_external_ellipse;

    /**
     * Overlap process option indicates one of the two methods of combining
     * rendered pixels in the processing window in an image with at least one
     * elliptical pixel selector. For overlapping elliptical pixel selectors
     * in an image, overlap_process_option shall have the same value.
     */
    enum AVHDRPlusOverlapProcessOption overlap_process_option;

    /**
     * The maximum of the color components of linearized RGB values in the
     * processing window in the scene. The values should be in the range of 0 to
     * 1, inclusive and in multiples of 0.00001. maxscl[ 0 ], maxscl[ 1 ], and
     * maxscl[ 2 ] are corresponding to R, G, B color components respectively.
     */
    AVRational maxscl[3];

    /**
     * The average of linearized maxRGB values in the processing window in the
     * scene. The value should be in the range of 0 to 1, inclusive and in
     * multiples of 0.00001.
     */
    AVRational average_maxrgb;

    /**
     * The number of linearized maxRGB values at given percentiles in the
     * processing window in the scene. The maximum value shall be 15.
     */
    uint8_t num_distribution_maxrgb_percentiles;

    /**
     * The linearized maxRGB values at given percentiles in the
     * processing window in the scene.
     */
    AVHDRPlusPercentile distribution_maxrgb[15];

    /**
     * The fraction of selected pixels in the image that contains the brightest
     * pixel in the scene. The value shall be in the range of 0 to 1, inclusive
     * and in multiples of 0.001.
     */
    AVRational fraction_bright_pixels;

    /**
     * This flag indicates that the metadata for the tone mapping function in
     * the processing window is present (for value of 1).
     */
    uint8_t tone_mapping_flag;

    /**
     * The x coordinate of the separation point between the linear part and the
     * curved part of the tone mapping function. The value shall be in the range
     * of 0 to 1, excluding 0 and in multiples of 1/4095.
     */
    AVRational knee_point_x;

    /**
     * The y coordinate of the separation point between the linear part and the
     * curved part of the tone mapping function. The value shall be in the range
     * of 0 to 1, excluding 0 and in multiples of 1/4095.
     */
    AVRational knee_point_y;

    /**
     * The number of the intermediate anchor parameters of the tone mapping
     * function in the processing window. The maximum value shall be 15.
     */
    uint8_t num_bezier_curve_anchors;

    /**
     * The intermediate anchor parameters of the tone mapping function in the
     * processing window in the scene. The values should be in the range of 0
     * to 1, inclusive and in multiples of 1/1023.
     */
    AVRational bezier_curve_anchors[15];

    /**
     * This flag shall be equal to 0 in bitstreams conforming to this version of
     * this Specification. Other values are reserved for future use.
     */
    uint8_t color_saturation_mapping_flag;

    /**
     * The color saturation gain in the processing window in the scene. The
     * value shall be in the range of 0 to 63/8, inclusive and in multiples of
     * 1/8. The default value shall be 1.
     */
    AVRational color_saturation_weight;
} AVHDRPlusColorTransformParams;

/**
 * This struct represents dynamic metadata for color volume transform -
 * application 4 of SMPTE 2094-40:2016 standard.
 *
 * To be used as payload of a AVFrameSideData or AVPacketSideData with the
 * appropriate type.
 *
 * @note The struct should be allocated with
 * av_dynamic_hdr_plus_alloc() and its size is not a part of
 * the public ABI.
 */
typedef struct AVDynamicHDRPlus {
    /**
     * Country code by Rec. ITU-T T.35 Annex A. The value shall be 0xB5.
     */
    uint8_t itu_t_t35_country_code;

    /**
     * Application version in the application defining document in ST-2094
     * suite. The value shall be set to 0.
     */
    uint8_t application_version;

    /**
     * The number of processing windows. The value shall be in the range
     * of 1 to 3, inclusive.
     */
    uint8_t num_windows;

    /**
     * The color transform parameters for every processing window.
     */
    AVHDRPlusColorTransformParams params[3];

    /**
     * The nominal maximum display luminance of the targeted system display,
     * in units of 0.0001 candelas per square metre. The value shall be in
     * the range of 0 to 10000, inclusive.
     */
    AVRational targeted_system_display_maximum_luminance;

    /**
     * This flag shall be equal to 0 in bit streams conforming to this version
     * of this Specification. The value 1 is reserved for future use.
     */
    uint8_t targeted_system_display_actual_peak_luminance_flag;

    /**
     * The number of rows in the targeted system_display_actual_peak_luminance
     * array. The value shall be in the range of 2 to 25, inclusive.
     */
    uint8_t num_rows_targeted_system_display_actual_peak_luminance;

    /**
     * The number of columns in the
     * targeted_system_display_actual_peak_luminance array. The value shall be
     * in the range of 2 to 25, inclusive.
     */
    uint8_t num_cols_targeted_system_display_actual_peak_luminance;

    /**
     * The normalized actual peak luminance of the targeted system display. The
     * values should be in the range of 0 to 1, inclusive and in multiples of
     * 1/15.
     */
    AVRational targeted_system_display_actual_peak_luminance[25][25];

    /**
     * This flag shall be equal to 0 in bitstreams conforming to this version of
     * this Specification. The value 1 is reserved for future use.
     */
    uint8_t mastering_display_actual_peak_luminance_flag;

    /**
     * The number of rows in the mastering_display_actual_peak_luminance array.
     * The value shall be in the range of 2 to 25, inclusive.
     */
    uint8_t num_rows_mastering_display_actual_peak_luminance;

    /**
     * The number of columns in the mastering_display_actual_peak_luminance
     * array. The value shall be in the range of 2 to 25, inclusive.
     */
    uint8_t num_cols_mastering_display_actual_peak_luminance;

    /**
     * The normalized actual peak luminance of the mastering display used for
     * mastering the image essence. The values should be in the range of 0 to 1,
     * inclusive and in multiples of 1/15.
     */
    AVRational mastering_display_actual_peak_luminance[25][25];
} AVDynamicHDRPlus;

/**
 * Allocate an AVDynamicHDRPlus structure and set its fields to
 * default values. The resulting struct can be freed using av_freep().
 *
 * @return An AVDynamicHDRPlus filled with default values or NULL
 *         on failure.
 */
AVDynamicHDRPlus *av_dynamic_hdr_plus_alloc(size_t *size);

/**
 * Allocate a complete AVDynamicHDRPlus and add it to the frame.
 * @param frame The frame which side data is added to.
 *
 * @return The AVDynamicHDRPlus structure to be filled by caller or NULL
 *         on failure.
 */
AVDynamicHDRPlus *av_dynamic_hdr_plus_create_side_data(AVFrame *frame);

#endif /* AVUTIL_HDR_DYNAMIC_METADATA_H */