FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavutil/hdr_dynamic_metadata.c
Date: 2025-11-02 12:19:36
Exec Total Coverage
Lines: 127 238 53.4%
Functions: 3 4 75.0%
Branches: 66 154 42.9%
Line Branch Exec Source
1 /**
2 * Copyright (c) 2018 Mohammad Izadi <moh.izadi at gmail.com>
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include "avassert.h"
22 #include "hdr_dynamic_metadata.h"
23 #include "mem.h"
24 #include "libavcodec/defs.h"
25 #include "libavcodec/get_bits.h"
26 #include "libavcodec/put_bits.h"
27
28 static const int64_t luminance_den = 1;
29 static const int32_t peak_luminance_den = 15;
30 static const int64_t rgb_den = 100000;
31 static const int32_t fraction_pixel_den = 1000;
32 static const int32_t knee_point_den = 4095;
33 static const int32_t bezier_anchor_den = 1023;
34 static const int32_t saturation_weight_den = 8;
35
36 17 AVDynamicHDRPlus *av_dynamic_hdr_plus_alloc(size_t *size)
37 {
38 17 AVDynamicHDRPlus *hdr_plus = av_mallocz(sizeof(AVDynamicHDRPlus));
39
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 17 if (!hdr_plus)
40 ✗ return NULL;
41
42
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 17 if (size)
43 17 *size = sizeof(*hdr_plus);
44
45 17 return hdr_plus;
46 }
47
48 ✗ AVDynamicHDRPlus *av_dynamic_hdr_plus_create_side_data(AVFrame *frame)
49 {
50 ✗ AVFrameSideData *side_data = av_frame_new_side_data(frame,
51 AV_FRAME_DATA_DYNAMIC_HDR_PLUS,
52 sizeof(AVDynamicHDRPlus));
53 ✗ if (!side_data)
54 ✗ return NULL;
55
56 ✗ memset(side_data->data, 0, sizeof(AVDynamicHDRPlus));
57
58 ✗ return (AVDynamicHDRPlus *)side_data->data;
59 }
60
61 17 int av_dynamic_hdr_plus_from_t35(AVDynamicHDRPlus *s, const uint8_t *data,
62 size_t size)
63 {
64 uint8_t padded_buf[AV_HDR_PLUS_MAX_PAYLOAD_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
65 17 GetBitContext gbc, *gb = &gbc;
66 int ret;
67
68
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 17 if (!s)
69 ✗ return AVERROR(ENOMEM);
70
71
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 17 if (size > AV_HDR_PLUS_MAX_PAYLOAD_SIZE)
72 ✗ return AVERROR(EINVAL);
73
74 17 memcpy(padded_buf, data, size);
75 // Zero-initialize the buffer padding to avoid overreads into uninitialized data.
76 17 memset(padded_buf + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
77
78 17 ret = init_get_bits8(gb, padded_buf, size);
79
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 17 if (ret < 0)
80 ✗ return ret;
81
82
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 17 if (get_bits_left(gb) < 10)
83 ✗ return AVERROR_INVALIDDATA;
84
85 17 s->application_version = get_bits(gb, 8);
86 17 s->num_windows = get_bits(gb, 2);
87
88
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 17 if (s->num_windows < 1 || s->num_windows > 3) {
89 ✗ return AVERROR_INVALIDDATA;
90 }
91
92
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 17 if (get_bits_left(gb) < ((19 * 8 + 1) * (s->num_windows - 1)))
93 ✗ return AVERROR_INVALIDDATA;
94
95
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 17 for (int w = 1; w < s->num_windows; w++) {
96 // The corners are set to absolute coordinates here. They should be
97 // converted to the relative coordinates (in [0, 1]) in the decoder.
98 ✗ AVHDRPlusColorTransformParams *params = &s->params[w];
99 ✗ params->window_upper_left_corner_x =
100 ✗ (AVRational){get_bits(gb, 16), 1};
101 ✗ params->window_upper_left_corner_y =
102 ✗ (AVRational){get_bits(gb, 16), 1};
103 ✗ params->window_lower_right_corner_x =
104 ✗ (AVRational){get_bits(gb, 16), 1};
105 ✗ params->window_lower_right_corner_y =
106 ✗ (AVRational){get_bits(gb, 16), 1};
107
108 ✗ params->center_of_ellipse_x = get_bits(gb, 16);
109 ✗ params->center_of_ellipse_y = get_bits(gb, 16);
110 ✗ params->rotation_angle = get_bits(gb, 8);
111 ✗ params->semimajor_axis_internal_ellipse = get_bits(gb, 16);
112 ✗ params->semimajor_axis_external_ellipse = get_bits(gb, 16);
113 ✗ params->semiminor_axis_external_ellipse = get_bits(gb, 16);
114 ✗ params->overlap_process_option = get_bits1(gb);
115 }
116
117
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 17 if (get_bits_left(gb) < 28)
118 ✗ return AVERROR_INVALIDDATA;
119
120 17 s->targeted_system_display_maximum_luminance =
121 17 (AVRational){get_bits_long(gb, 27), luminance_den};
122 17 s->targeted_system_display_actual_peak_luminance_flag = get_bits1(gb);
123
124
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 17 if (s->targeted_system_display_actual_peak_luminance_flag) {
125 int rows, cols;
126 ✗ if (get_bits_left(gb) < 10)
127 ✗ return AVERROR_INVALIDDATA;
128 ✗ rows = get_bits(gb, 5);
129 ✗ cols = get_bits(gb, 5);
130 ✗ if (((rows < 2) || (rows > 25)) || ((cols < 2) || (cols > 25))) {
131 ✗ return AVERROR_INVALIDDATA;
132 }
133 ✗ s->num_rows_targeted_system_display_actual_peak_luminance = rows;
134 ✗ s->num_cols_targeted_system_display_actual_peak_luminance = cols;
135
136 ✗ if (get_bits_left(gb) < (rows * cols * 4))
137 ✗ return AVERROR_INVALIDDATA;
138
139 ✗ for (int i = 0; i < rows; i++) {
140 ✗ for (int j = 0; j < cols; j++) {
141 ✗ s->targeted_system_display_actual_peak_luminance[i][j] =
142 ✗ (AVRational){get_bits(gb, 4), peak_luminance_den};
143 }
144 }
145 }
146
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 34 for (int w = 0; w < s->num_windows; w++) {
147 17 AVHDRPlusColorTransformParams *params = &s->params[w];
148
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 17 if (get_bits_left(gb) < (3 * 17 + 17 + 4))
149 ✗ return AVERROR_INVALIDDATA;
150
151
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 68 for (int i = 0; i < 3; i++) {
152 51 params->maxscl[i] =
153 51 (AVRational){get_bits(gb, 17), rgb_den};
154 }
155 17 params->average_maxrgb =
156 17 (AVRational){get_bits(gb, 17), rgb_den};
157 17 params->num_distribution_maxrgb_percentiles = get_bits(gb, 4);
158
159 17 if (get_bits_left(gb) <
160
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 17 (params->num_distribution_maxrgb_percentiles * 24))
161 ✗ return AVERROR_INVALIDDATA;
162
163
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 170 for (int i = 0; i < params->num_distribution_maxrgb_percentiles; i++) {
164 153 params->distribution_maxrgb[i].percentage = get_bits(gb, 7);
165 153 params->distribution_maxrgb[i].percentile =
166 153 (AVRational){get_bits(gb, 17), rgb_den};
167 }
168
169
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 17 if (get_bits_left(gb) < 10)
170 ✗ return AVERROR_INVALIDDATA;
171
172 17 params->fraction_bright_pixels = (AVRational){get_bits(gb, 10), fraction_pixel_den};
173 }
174
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 17 if (get_bits_left(gb) < 1)
175 ✗ return AVERROR_INVALIDDATA;
176 17 s->mastering_display_actual_peak_luminance_flag = get_bits1(gb);
177
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 17 if (s->mastering_display_actual_peak_luminance_flag) {
178 int rows, cols;
179 ✗ if (get_bits_left(gb) < 10)
180 ✗ return AVERROR_INVALIDDATA;
181 ✗ rows = get_bits(gb, 5);
182 ✗ cols = get_bits(gb, 5);
183 ✗ if (((rows < 2) || (rows > 25)) || ((cols < 2) || (cols > 25))) {
184 ✗ return AVERROR_INVALIDDATA;
185 }
186 ✗ s->num_rows_mastering_display_actual_peak_luminance = rows;
187 ✗ s->num_cols_mastering_display_actual_peak_luminance = cols;
188
189 ✗ if (get_bits_left(gb) < (rows * cols * 4))
190 ✗ return AVERROR_INVALIDDATA;
191
192 ✗ for (int i = 0; i < rows; i++) {
193 ✗ for (int j = 0; j < cols; j++) {
194 ✗ s->mastering_display_actual_peak_luminance[i][j] =
195 ✗ (AVRational){get_bits(gb, 4), peak_luminance_den};
196 }
197 }
198 }
199
200
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 34 for (int w = 0; w < s->num_windows; w++) {
201 17 AVHDRPlusColorTransformParams *params = &s->params[w];
202
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 17 if (get_bits_left(gb) < 1)
203 ✗ return AVERROR_INVALIDDATA;
204
205 17 params->tone_mapping_flag = get_bits1(gb);
206
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 17 if (params->tone_mapping_flag) {
207
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 17 if (get_bits_left(gb) < 28)
208 ✗ return AVERROR_INVALIDDATA;
209
210 17 params->knee_point_x =
211 17 (AVRational){get_bits(gb, 12), knee_point_den};
212 17 params->knee_point_y =
213 17 (AVRational){get_bits(gb, 12), knee_point_den};
214 17 params->num_bezier_curve_anchors = get_bits(gb, 4);
215
216
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 17 if (get_bits_left(gb) < (params->num_bezier_curve_anchors * 10))
217 ✗ return AVERROR_INVALIDDATA;
218
219
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 170 for (int i = 0; i < params->num_bezier_curve_anchors; i++) {
220 153 params->bezier_curve_anchors[i] =
221 153 (AVRational){get_bits(gb, 10), bezier_anchor_den};
222 }
223 }
224
225
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 17 if (get_bits_left(gb) < 1)
226 ✗ return AVERROR_INVALIDDATA;
227 17 params->color_saturation_mapping_flag = get_bits1(gb);
228
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 17 if (params->color_saturation_mapping_flag) {
229 ✗ if (get_bits_left(gb) < 6)
230 ✗ return AVERROR_INVALIDDATA;
231 ✗ params->color_saturation_weight =
232 ✗ (AVRational){get_bits(gb, 6), saturation_weight_den};
233 }
234 }
235
236 17 return 0;
237 }
238
239 2 int av_dynamic_hdr_plus_to_t35(const AVDynamicHDRPlus *s, uint8_t **data, size_t *size)
240 {
241 uint8_t *buf;
242 size_t size_bits, size_bytes;
243 2 PutBitContext pbc, *pb = &pbc;
244
245
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 2 if (!s)
246 ✗ return AVERROR(EINVAL);
247
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 2 if ((!data || *data) && !size)
248 ✗ return AVERROR(EINVAL);
249
250 /**
251 * Buffer size per CTA-861-H p.253-254:
252 * 48 header bits (excluded from the serialized payload)
253 * 8 bits for application_mode
254 * 2 bits for num_windows
255 * 153 bits for window geometry, for each window above 1
256 * 27 bits for targeted_system_display_maximum_luminance
257 * 1-2511 bits for targeted system display peak luminance information
258 * 82-442 bits per window for pixel distribution information
259 * 1-2511 bits for mastering display peak luminance information
260 * 1-179 bits per window for tonemapping information
261 * 1-7 bits per window for color saturation mapping information
262 * Total: 123-7249 bits, excluding trimmed header bits
263 */
264 2 size_bits = 8;
265
266 2 size_bits += 2;
267
268
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 2 for (int w = 1; w < s->num_windows; w++)
269 ✗ size_bits += 153;
270
271 2 size_bits += 27;
272
273 2 size_bits += 1;
274
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 2 if (s->targeted_system_display_actual_peak_luminance_flag)
275 ✗ size_bits += 10 +
276 ✗ s->num_rows_targeted_system_display_actual_peak_luminance *
277 ✗ s->num_cols_targeted_system_display_actual_peak_luminance * 4;
278
279
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 4 for (int w = 0; w < s->num_windows; w++)
280 2 size_bits += 72 + s->params[w].num_distribution_maxrgb_percentiles * 24 + 10;
281
282 2 size_bits += 1;
283
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 2 if (s->mastering_display_actual_peak_luminance_flag)
284 ✗ size_bits += 10 +
285 ✗ s->num_rows_mastering_display_actual_peak_luminance *
286 ✗ s->num_cols_mastering_display_actual_peak_luminance * 4;
287
288
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289 2 size_bits += 1;
290
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 2 if (s->params[w].tone_mapping_flag)
291 2 size_bits += 28 + s->params[w].num_bezier_curve_anchors * 10;
292
293 2 size_bits += 1;
294
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 2 if (s->params[w].color_saturation_mapping_flag)
295 ✗ size_bits += 6;
296 }
297
298 2 size_bytes = (size_bits + 7) / 8;
299
300
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 2 av_assert0(size_bytes <= AV_HDR_PLUS_MAX_PAYLOAD_SIZE);
301
302
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 2 if (!data) {
303 ✗ *size = size_bytes;
304 ✗ return 0;
305
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 2 } else if (*data) {
306
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 2 if (*size < size_bytes)
307 ✗ return AVERROR_BUFFER_TOO_SMALL;
308 2 buf = *data;
309 } else {
310 ✗ buf = av_malloc(size_bytes);
311 ✗ if (!buf)
312 ✗ return AVERROR(ENOMEM);
313 }
314
315 2 init_put_bits(pb, buf, size_bytes);
316
317 // application_mode is set to Application Version 1
318 2 put_bits(pb, 8, 1);
319
320 // Payload as per CTA-861-H p.253-254
321 2 put_bits(pb, 2, s->num_windows);
322
323
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 2 for (int w = 1; w < s->num_windows; w++) {
324 ✗ put_bits(pb, 16, s->params[w].window_upper_left_corner_x.num / s->params[w].window_upper_left_corner_x.den);
325 ✗ put_bits(pb, 16, s->params[w].window_upper_left_corner_y.num / s->params[w].window_upper_left_corner_y.den);
326 ✗ put_bits(pb, 16, s->params[w].window_lower_right_corner_x.num / s->params[w].window_lower_right_corner_x.den);
327 ✗ put_bits(pb, 16, s->params[w].window_lower_right_corner_y.num / s->params[w].window_lower_right_corner_y.den);
328 ✗ put_bits(pb, 16, s->params[w].center_of_ellipse_x);
329 ✗ put_bits(pb, 16, s->params[w].center_of_ellipse_y);
330 ✗ put_bits(pb, 8, s->params[w].rotation_angle);
331 ✗ put_bits(pb, 16, s->params[w].semimajor_axis_internal_ellipse);
332 ✗ put_bits(pb, 16, s->params[w].semimajor_axis_external_ellipse);
333 ✗ put_bits(pb, 16, s->params[w].semiminor_axis_external_ellipse);
334 ✗ put_bits(pb, 1, s->params[w].overlap_process_option);
335 }
336
337 2 put_bits(pb, 27, s->targeted_system_display_maximum_luminance.num * luminance_den /
338 2 s->targeted_system_display_maximum_luminance.den);
339 2 put_bits(pb, 1, s->targeted_system_display_actual_peak_luminance_flag);
340
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 2 if (s->targeted_system_display_actual_peak_luminance_flag) {
341 ✗ put_bits(pb, 5, s->num_rows_targeted_system_display_actual_peak_luminance);
342 ✗ put_bits(pb, 5, s->num_cols_targeted_system_display_actual_peak_luminance);
343 ✗ for (int i = 0; i < s->num_rows_targeted_system_display_actual_peak_luminance; i++) {
344 ✗ for (int j = 0; j < s->num_cols_targeted_system_display_actual_peak_luminance; j++)
345 ✗ put_bits(pb, 4, s->targeted_system_display_actual_peak_luminance[i][j].num * peak_luminance_den /
346 ✗ s->targeted_system_display_actual_peak_luminance[i][j].den);
347 }
348 }
349
350
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 4 for (int w = 0; w < s->num_windows; w++) {
351
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 8 for (int i = 0; i < 3; i++)
352 6 put_bits(pb, 17, s->params[w].maxscl[i].num * rgb_den / s->params[w].maxscl[i].den);
353 2 put_bits(pb, 17, s->params[w].average_maxrgb.num * rgb_den / s->params[w].average_maxrgb.den);
354 2 put_bits(pb, 4, s->params[w].num_distribution_maxrgb_percentiles);
355
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 20 for (int i = 0; i < s->params[w].num_distribution_maxrgb_percentiles; i++) {
356 18 put_bits(pb, 7, s->params[w].distribution_maxrgb[i].percentage);
357 18 put_bits(pb, 17, s->params[w].distribution_maxrgb[i].percentile.num * rgb_den /
358 18 s->params[w].distribution_maxrgb[i].percentile.den);
359 }
360 2 put_bits(pb, 10, s->params[w].fraction_bright_pixels.num * fraction_pixel_den /
361 2 s->params[w].fraction_bright_pixels.den);
362 }
363
364 2 put_bits(pb, 1, s->mastering_display_actual_peak_luminance_flag);
365
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 2 if (s->mastering_display_actual_peak_luminance_flag) {
366 ✗ put_bits(pb, 5, s->num_rows_mastering_display_actual_peak_luminance);
367 ✗ put_bits(pb, 5, s->num_cols_mastering_display_actual_peak_luminance);
368 ✗ for (int i = 0; i < s->num_rows_mastering_display_actual_peak_luminance; i++) {
369 ✗ for (int j = 0; j < s->num_cols_mastering_display_actual_peak_luminance; j++)
370 ✗ put_bits(pb, 4, s->mastering_display_actual_peak_luminance[i][j].num * peak_luminance_den /
371 ✗ s->mastering_display_actual_peak_luminance[i][j].den);
372 }
373 }
374
375
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 4 for (int w = 0; w < s->num_windows; w++) {
376 2 put_bits(pb, 1, s->params[w].tone_mapping_flag);
377
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 2 if (s->params[w].tone_mapping_flag) {
378 2 put_bits(pb, 12, s->params[w].knee_point_x.num * knee_point_den / s->params[w].knee_point_x.den);
379 2 put_bits(pb, 12, s->params[w].knee_point_y.num * knee_point_den / s->params[w].knee_point_y.den);
380 2 put_bits(pb, 4, s->params[w].num_bezier_curve_anchors);
381
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 20 for (int i = 0; i < s->params[w].num_bezier_curve_anchors; i++)
382 18 put_bits(pb, 10, s->params[w].bezier_curve_anchors[i].num * bezier_anchor_den /
383 18 s->params[w].bezier_curve_anchors[i].den);
384 2 put_bits(pb, 1, s->params[w].color_saturation_mapping_flag);
385
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 2 if (s->params[w].color_saturation_mapping_flag)
386 ✗ put_bits(pb, 6, s->params[w].color_saturation_weight.num * saturation_weight_den /
387 ✗ s->params[w].color_saturation_weight.den);
388 }
389 }
390
391 2 flush_put_bits(pb);
392
393 2 *data = buf;
394
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 2 if (size)
395 2 *size = size_bytes;
396 2 return 0;
397 }
398