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2ba45a60 DM |
1 | /* |
2 | * AVPacket functions for libavcodec | |
3 | * Copyright (c) 2000, 2001, 2002 Fabrice Bellard | |
4 | * | |
5 | * This file is part of FFmpeg. | |
6 | * | |
7 | * FFmpeg is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
10 | * version 2.1 of the License, or (at your option) any later version. | |
11 | * | |
12 | * FFmpeg is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with FFmpeg; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
22 | #include <string.h> | |
23 | ||
24 | #include "libavutil/avassert.h" | |
25 | #include "libavutil/common.h" | |
26 | #include "libavutil/internal.h" | |
27 | #include "libavutil/mathematics.h" | |
28 | #include "libavutil/mem.h" | |
29 | #include "avcodec.h" | |
30 | #include "bytestream.h" | |
31 | #include "internal.h" | |
32 | ||
33 | #if FF_API_DESTRUCT_PACKET | |
34 | ||
35 | void av_destruct_packet(AVPacket *pkt) | |
36 | { | |
f6fa7814 | 37 | av_freep(&pkt->data); |
2ba45a60 DM |
38 | pkt->size = 0; |
39 | } | |
40 | ||
41 | /* a dummy destruct callback for the callers that assume AVPacket.destruct == | |
42 | * NULL => static data */ | |
43 | static void dummy_destruct_packet(AVPacket *pkt) | |
44 | { | |
45 | av_assert0(0); | |
46 | } | |
47 | #endif | |
48 | ||
49 | void av_init_packet(AVPacket *pkt) | |
50 | { | |
51 | pkt->pts = AV_NOPTS_VALUE; | |
52 | pkt->dts = AV_NOPTS_VALUE; | |
53 | pkt->pos = -1; | |
54 | pkt->duration = 0; | |
55 | pkt->convergence_duration = 0; | |
56 | pkt->flags = 0; | |
57 | pkt->stream_index = 0; | |
58 | #if FF_API_DESTRUCT_PACKET | |
59 | FF_DISABLE_DEPRECATION_WARNINGS | |
60 | pkt->destruct = NULL; | |
61 | FF_ENABLE_DEPRECATION_WARNINGS | |
62 | #endif | |
63 | pkt->buf = NULL; | |
64 | pkt->side_data = NULL; | |
65 | pkt->side_data_elems = 0; | |
66 | } | |
67 | ||
68 | static int packet_alloc(AVBufferRef **buf, int size) | |
69 | { | |
70 | int ret; | |
71 | if ((unsigned)size >= (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE) | |
72 | return AVERROR(EINVAL); | |
73 | ||
74 | ret = av_buffer_realloc(buf, size + FF_INPUT_BUFFER_PADDING_SIZE); | |
75 | if (ret < 0) | |
76 | return ret; | |
77 | ||
78 | memset((*buf)->data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE); | |
79 | ||
80 | return 0; | |
81 | } | |
82 | ||
83 | int av_new_packet(AVPacket *pkt, int size) | |
84 | { | |
85 | AVBufferRef *buf = NULL; | |
86 | int ret = packet_alloc(&buf, size); | |
87 | if (ret < 0) | |
88 | return ret; | |
89 | ||
90 | av_init_packet(pkt); | |
91 | pkt->buf = buf; | |
92 | pkt->data = buf->data; | |
93 | pkt->size = size; | |
94 | #if FF_API_DESTRUCT_PACKET | |
95 | FF_DISABLE_DEPRECATION_WARNINGS | |
96 | pkt->destruct = dummy_destruct_packet; | |
97 | FF_ENABLE_DEPRECATION_WARNINGS | |
98 | #endif | |
99 | ||
100 | return 0; | |
101 | } | |
102 | ||
103 | void av_shrink_packet(AVPacket *pkt, int size) | |
104 | { | |
105 | if (pkt->size <= size) | |
106 | return; | |
107 | pkt->size = size; | |
108 | memset(pkt->data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE); | |
109 | } | |
110 | ||
111 | int av_grow_packet(AVPacket *pkt, int grow_by) | |
112 | { | |
113 | int new_size; | |
114 | av_assert0((unsigned)pkt->size <= INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE); | |
115 | if (!pkt->size) | |
116 | return av_new_packet(pkt, grow_by); | |
117 | if ((unsigned)grow_by > | |
118 | INT_MAX - (pkt->size + FF_INPUT_BUFFER_PADDING_SIZE)) | |
119 | return -1; | |
120 | ||
121 | new_size = pkt->size + grow_by + FF_INPUT_BUFFER_PADDING_SIZE; | |
122 | if (pkt->buf) { | |
123 | int ret = av_buffer_realloc(&pkt->buf, new_size); | |
124 | if (ret < 0) | |
125 | return ret; | |
126 | } else { | |
127 | pkt->buf = av_buffer_alloc(new_size); | |
128 | if (!pkt->buf) | |
129 | return AVERROR(ENOMEM); | |
130 | memcpy(pkt->buf->data, pkt->data, FFMIN(pkt->size, pkt->size + grow_by)); | |
131 | #if FF_API_DESTRUCT_PACKET | |
132 | FF_DISABLE_DEPRECATION_WARNINGS | |
133 | pkt->destruct = dummy_destruct_packet; | |
134 | FF_ENABLE_DEPRECATION_WARNINGS | |
135 | #endif | |
136 | } | |
137 | pkt->data = pkt->buf->data; | |
138 | pkt->size += grow_by; | |
139 | memset(pkt->data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE); | |
140 | ||
141 | return 0; | |
142 | } | |
143 | ||
144 | int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size) | |
145 | { | |
146 | if (size >= INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE) | |
147 | return AVERROR(EINVAL); | |
148 | ||
149 | pkt->buf = av_buffer_create(data, size + FF_INPUT_BUFFER_PADDING_SIZE, | |
150 | av_buffer_default_free, NULL, 0); | |
151 | if (!pkt->buf) | |
152 | return AVERROR(ENOMEM); | |
153 | ||
154 | pkt->data = data; | |
155 | pkt->size = size; | |
156 | #if FF_API_DESTRUCT_PACKET | |
157 | FF_DISABLE_DEPRECATION_WARNINGS | |
158 | pkt->destruct = dummy_destruct_packet; | |
159 | FF_ENABLE_DEPRECATION_WARNINGS | |
160 | #endif | |
161 | ||
162 | return 0; | |
163 | } | |
164 | ||
165 | #define ALLOC_MALLOC(data, size) data = av_malloc(size) | |
166 | #define ALLOC_BUF(data, size) \ | |
167 | do { \ | |
168 | av_buffer_realloc(&pkt->buf, size); \ | |
169 | data = pkt->buf ? pkt->buf->data : NULL; \ | |
170 | } while (0) | |
171 | ||
172 | #define DUP_DATA(dst, src, size, padding, ALLOC) \ | |
173 | do { \ | |
174 | void *data; \ | |
175 | if (padding) { \ | |
176 | if ((unsigned)(size) > \ | |
177 | (unsigned)(size) + FF_INPUT_BUFFER_PADDING_SIZE) \ | |
178 | goto failed_alloc; \ | |
179 | ALLOC(data, size + FF_INPUT_BUFFER_PADDING_SIZE); \ | |
180 | } else { \ | |
181 | ALLOC(data, size); \ | |
182 | } \ | |
183 | if (!data) \ | |
184 | goto failed_alloc; \ | |
185 | memcpy(data, src, size); \ | |
186 | if (padding) \ | |
187 | memset((uint8_t *)data + size, 0, \ | |
188 | FF_INPUT_BUFFER_PADDING_SIZE); \ | |
189 | dst = data; \ | |
190 | } while (0) | |
191 | ||
192 | /* Makes duplicates of data, side_data, but does not copy any other fields */ | |
193 | static int copy_packet_data(AVPacket *pkt, const AVPacket *src, int dup) | |
194 | { | |
195 | pkt->data = NULL; | |
196 | pkt->side_data = NULL; | |
197 | if (pkt->buf) { | |
198 | AVBufferRef *ref = av_buffer_ref(src->buf); | |
199 | if (!ref) | |
200 | return AVERROR(ENOMEM); | |
201 | pkt->buf = ref; | |
202 | pkt->data = ref->data; | |
203 | } else { | |
204 | DUP_DATA(pkt->data, src->data, pkt->size, 1, ALLOC_BUF); | |
205 | } | |
206 | #if FF_API_DESTRUCT_PACKET | |
207 | FF_DISABLE_DEPRECATION_WARNINGS | |
208 | pkt->destruct = dummy_destruct_packet; | |
209 | FF_ENABLE_DEPRECATION_WARNINGS | |
210 | #endif | |
211 | if (pkt->side_data_elems && dup) | |
212 | pkt->side_data = src->side_data; | |
213 | if (pkt->side_data_elems && !dup) { | |
214 | return av_copy_packet_side_data(pkt, src); | |
215 | } | |
216 | return 0; | |
217 | ||
218 | failed_alloc: | |
219 | av_free_packet(pkt); | |
220 | return AVERROR(ENOMEM); | |
221 | } | |
222 | ||
223 | int av_copy_packet_side_data(AVPacket *pkt, const AVPacket *src) | |
224 | { | |
225 | if (src->side_data_elems) { | |
226 | int i; | |
227 | DUP_DATA(pkt->side_data, src->side_data, | |
228 | src->side_data_elems * sizeof(*src->side_data), 0, ALLOC_MALLOC); | |
229 | if (src != pkt) { | |
230 | memset(pkt->side_data, 0, | |
231 | src->side_data_elems * sizeof(*src->side_data)); | |
232 | } | |
233 | for (i = 0; i < src->side_data_elems; i++) { | |
234 | DUP_DATA(pkt->side_data[i].data, src->side_data[i].data, | |
235 | src->side_data[i].size, 1, ALLOC_MALLOC); | |
236 | pkt->side_data[i].size = src->side_data[i].size; | |
237 | pkt->side_data[i].type = src->side_data[i].type; | |
238 | } | |
239 | } | |
240 | pkt->side_data_elems = src->side_data_elems; | |
241 | return 0; | |
242 | ||
243 | failed_alloc: | |
244 | av_free_packet(pkt); | |
245 | return AVERROR(ENOMEM); | |
246 | } | |
247 | ||
248 | int av_dup_packet(AVPacket *pkt) | |
249 | { | |
250 | AVPacket tmp_pkt; | |
251 | ||
252 | FF_DISABLE_DEPRECATION_WARNINGS | |
253 | if (!pkt->buf && pkt->data | |
254 | #if FF_API_DESTRUCT_PACKET | |
255 | && !pkt->destruct | |
256 | #endif | |
257 | ) { | |
258 | FF_ENABLE_DEPRECATION_WARNINGS | |
259 | tmp_pkt = *pkt; | |
260 | return copy_packet_data(pkt, &tmp_pkt, 1); | |
261 | } | |
262 | return 0; | |
263 | } | |
264 | ||
265 | int av_copy_packet(AVPacket *dst, const AVPacket *src) | |
266 | { | |
267 | *dst = *src; | |
268 | return copy_packet_data(dst, src, 0); | |
269 | } | |
270 | ||
271 | void av_packet_free_side_data(AVPacket *pkt) | |
272 | { | |
273 | int i; | |
274 | for (i = 0; i < pkt->side_data_elems; i++) | |
f6fa7814 | 275 | av_freep(&pkt->side_data[i].data); |
2ba45a60 DM |
276 | av_freep(&pkt->side_data); |
277 | pkt->side_data_elems = 0; | |
278 | } | |
279 | ||
280 | void av_free_packet(AVPacket *pkt) | |
281 | { | |
282 | if (pkt) { | |
283 | FF_DISABLE_DEPRECATION_WARNINGS | |
284 | if (pkt->buf) | |
285 | av_buffer_unref(&pkt->buf); | |
286 | #if FF_API_DESTRUCT_PACKET | |
287 | else if (pkt->destruct) | |
288 | pkt->destruct(pkt); | |
289 | pkt->destruct = NULL; | |
290 | #endif | |
291 | FF_ENABLE_DEPRECATION_WARNINGS | |
292 | pkt->data = NULL; | |
293 | pkt->size = 0; | |
294 | ||
295 | av_packet_free_side_data(pkt); | |
296 | } | |
297 | } | |
298 | ||
299 | uint8_t *av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, | |
300 | int size) | |
301 | { | |
302 | int elems = pkt->side_data_elems; | |
303 | ||
304 | if ((unsigned)elems + 1 > INT_MAX / sizeof(*pkt->side_data)) | |
305 | return NULL; | |
306 | if ((unsigned)size > INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE) | |
307 | return NULL; | |
308 | ||
309 | pkt->side_data = av_realloc(pkt->side_data, | |
310 | (elems + 1) * sizeof(*pkt->side_data)); | |
311 | if (!pkt->side_data) | |
312 | return NULL; | |
313 | ||
314 | pkt->side_data[elems].data = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE); | |
315 | if (!pkt->side_data[elems].data) | |
316 | return NULL; | |
317 | pkt->side_data[elems].size = size; | |
318 | pkt->side_data[elems].type = type; | |
319 | pkt->side_data_elems++; | |
320 | ||
321 | return pkt->side_data[elems].data; | |
322 | } | |
323 | ||
324 | uint8_t *av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type, | |
325 | int *size) | |
326 | { | |
327 | int i; | |
328 | ||
329 | for (i = 0; i < pkt->side_data_elems; i++) { | |
330 | if (pkt->side_data[i].type == type) { | |
331 | if (size) | |
332 | *size = pkt->side_data[i].size; | |
333 | return pkt->side_data[i].data; | |
334 | } | |
335 | } | |
336 | return NULL; | |
337 | } | |
338 | ||
339 | #define FF_MERGE_MARKER 0x8c4d9d108e25e9feULL | |
340 | ||
341 | int av_packet_merge_side_data(AVPacket *pkt){ | |
342 | if(pkt->side_data_elems){ | |
343 | AVBufferRef *buf; | |
344 | int i; | |
345 | uint8_t *p; | |
346 | uint64_t size= pkt->size + 8LL + FF_INPUT_BUFFER_PADDING_SIZE; | |
347 | AVPacket old= *pkt; | |
348 | for (i=0; i<old.side_data_elems; i++) { | |
349 | size += old.side_data[i].size + 5LL; | |
350 | } | |
351 | if (size > INT_MAX) | |
352 | return AVERROR(EINVAL); | |
353 | buf = av_buffer_alloc(size); | |
354 | if (!buf) | |
355 | return AVERROR(ENOMEM); | |
356 | pkt->buf = buf; | |
357 | pkt->data = p = buf->data; | |
358 | #if FF_API_DESTRUCT_PACKET | |
359 | FF_DISABLE_DEPRECATION_WARNINGS | |
360 | pkt->destruct = dummy_destruct_packet; | |
361 | FF_ENABLE_DEPRECATION_WARNINGS | |
362 | #endif | |
363 | pkt->size = size - FF_INPUT_BUFFER_PADDING_SIZE; | |
364 | bytestream_put_buffer(&p, old.data, old.size); | |
365 | for (i=old.side_data_elems-1; i>=0; i--) { | |
366 | bytestream_put_buffer(&p, old.side_data[i].data, old.side_data[i].size); | |
367 | bytestream_put_be32(&p, old.side_data[i].size); | |
368 | *p++ = old.side_data[i].type | ((i==old.side_data_elems-1)*128); | |
369 | } | |
370 | bytestream_put_be64(&p, FF_MERGE_MARKER); | |
371 | av_assert0(p-pkt->data == pkt->size); | |
372 | memset(p, 0, FF_INPUT_BUFFER_PADDING_SIZE); | |
373 | av_free_packet(&old); | |
374 | pkt->side_data_elems = 0; | |
375 | pkt->side_data = NULL; | |
376 | return 1; | |
377 | } | |
378 | return 0; | |
379 | } | |
380 | ||
381 | int av_packet_split_side_data(AVPacket *pkt){ | |
382 | if (!pkt->side_data_elems && pkt->size >12 && AV_RB64(pkt->data + pkt->size - 8) == FF_MERGE_MARKER){ | |
383 | int i; | |
384 | unsigned int size; | |
385 | uint8_t *p; | |
386 | ||
387 | p = pkt->data + pkt->size - 8 - 5; | |
388 | for (i=1; ; i++){ | |
389 | size = AV_RB32(p); | |
390 | if (size>INT_MAX || p - pkt->data < size) | |
391 | return 0; | |
392 | if (p[4]&128) | |
393 | break; | |
394 | p-= size+5; | |
395 | } | |
396 | ||
397 | pkt->side_data = av_malloc_array(i, sizeof(*pkt->side_data)); | |
398 | if (!pkt->side_data) | |
399 | return AVERROR(ENOMEM); | |
400 | ||
401 | p= pkt->data + pkt->size - 8 - 5; | |
402 | for (i=0; ; i++){ | |
403 | size= AV_RB32(p); | |
404 | av_assert0(size<=INT_MAX && p - pkt->data >= size); | |
405 | pkt->side_data[i].data = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE); | |
406 | pkt->side_data[i].size = size; | |
407 | pkt->side_data[i].type = p[4]&127; | |
408 | if (!pkt->side_data[i].data) | |
409 | return AVERROR(ENOMEM); | |
410 | memcpy(pkt->side_data[i].data, p-size, size); | |
411 | pkt->size -= size + 5; | |
412 | if(p[4]&128) | |
413 | break; | |
414 | p-= size+5; | |
415 | } | |
416 | pkt->size -= 8; | |
417 | pkt->side_data_elems = i+1; | |
418 | return 1; | |
419 | } | |
420 | return 0; | |
421 | } | |
422 | ||
423 | uint8_t *av_packet_pack_dictionary(AVDictionary *dict, int *size) | |
424 | { | |
425 | AVDictionaryEntry *t = NULL; | |
426 | uint8_t *data = NULL; | |
427 | *size = 0; | |
428 | ||
429 | if (!dict) | |
430 | return NULL; | |
431 | ||
432 | while ((t = av_dict_get(dict, "", t, AV_DICT_IGNORE_SUFFIX))) { | |
433 | const size_t keylen = strlen(t->key); | |
434 | const size_t valuelen = strlen(t->value); | |
435 | const size_t new_size = *size + keylen + 1 + valuelen + 1; | |
436 | uint8_t *const new_data = av_realloc(data, new_size); | |
437 | ||
438 | if (!new_data) | |
439 | goto fail; | |
440 | data = new_data; | |
441 | if (new_size > INT_MAX) | |
442 | goto fail; | |
443 | ||
444 | memcpy(data + *size, t->key, keylen + 1); | |
445 | memcpy(data + *size + keylen + 1, t->value, valuelen + 1); | |
446 | ||
447 | *size = new_size; | |
448 | } | |
449 | ||
450 | return data; | |
451 | ||
452 | fail: | |
453 | av_freep(&data); | |
454 | *size = 0; | |
455 | return NULL; | |
456 | } | |
457 | ||
458 | int av_packet_unpack_dictionary(const uint8_t *data, int size, AVDictionary **dict) | |
459 | { | |
460 | const uint8_t *end = data + size; | |
461 | int ret = 0; | |
462 | ||
463 | if (!dict || !data || !size) | |
464 | return ret; | |
465 | if (size && end[-1]) | |
466 | return AVERROR_INVALIDDATA; | |
467 | while (data < end) { | |
468 | const uint8_t *key = data; | |
469 | const uint8_t *val = data + strlen(key) + 1; | |
470 | ||
471 | if (val >= end) | |
472 | return AVERROR_INVALIDDATA; | |
473 | ||
474 | ret = av_dict_set(dict, key, val, 0); | |
475 | if (ret < 0) | |
476 | break; | |
477 | data = val + strlen(val) + 1; | |
478 | } | |
479 | ||
480 | return ret; | |
481 | } | |
482 | ||
483 | int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type, | |
484 | int size) | |
485 | { | |
486 | int i; | |
487 | ||
488 | for (i = 0; i < pkt->side_data_elems; i++) { | |
489 | if (pkt->side_data[i].type == type) { | |
490 | if (size > pkt->side_data[i].size) | |
491 | return AVERROR(ENOMEM); | |
492 | pkt->side_data[i].size = size; | |
493 | return 0; | |
494 | } | |
495 | } | |
496 | return AVERROR(ENOENT); | |
497 | } | |
498 | ||
499 | int av_packet_copy_props(AVPacket *dst, const AVPacket *src) | |
500 | { | |
501 | int i; | |
502 | ||
503 | dst->pts = src->pts; | |
504 | dst->dts = src->dts; | |
505 | dst->pos = src->pos; | |
506 | dst->duration = src->duration; | |
507 | dst->convergence_duration = src->convergence_duration; | |
508 | dst->flags = src->flags; | |
509 | dst->stream_index = src->stream_index; | |
510 | ||
511 | for (i = 0; i < src->side_data_elems; i++) { | |
512 | enum AVPacketSideDataType type = src->side_data[i].type; | |
513 | int size = src->side_data[i].size; | |
514 | uint8_t *src_data = src->side_data[i].data; | |
515 | uint8_t *dst_data = av_packet_new_side_data(dst, type, size); | |
516 | ||
517 | if (!dst_data) { | |
518 | av_packet_free_side_data(dst); | |
519 | return AVERROR(ENOMEM); | |
520 | } | |
521 | memcpy(dst_data, src_data, size); | |
522 | } | |
523 | ||
524 | return 0; | |
525 | } | |
526 | ||
527 | void av_packet_unref(AVPacket *pkt) | |
528 | { | |
529 | av_packet_free_side_data(pkt); | |
530 | av_buffer_unref(&pkt->buf); | |
531 | av_init_packet(pkt); | |
532 | pkt->data = NULL; | |
533 | pkt->size = 0; | |
534 | } | |
535 | ||
536 | int av_packet_ref(AVPacket *dst, const AVPacket *src) | |
537 | { | |
538 | int ret; | |
539 | ||
540 | ret = av_packet_copy_props(dst, src); | |
541 | if (ret < 0) | |
542 | return ret; | |
543 | ||
544 | if (!src->buf) { | |
545 | ret = packet_alloc(&dst->buf, src->size); | |
546 | if (ret < 0) | |
547 | goto fail; | |
548 | memcpy(dst->buf->data, src->data, src->size); | |
549 | } else | |
550 | dst->buf = av_buffer_ref(src->buf); | |
551 | ||
552 | dst->size = src->size; | |
553 | dst->data = dst->buf->data; | |
554 | return 0; | |
555 | fail: | |
556 | av_packet_free_side_data(dst); | |
557 | return ret; | |
558 | } | |
559 | ||
560 | void av_packet_move_ref(AVPacket *dst, AVPacket *src) | |
561 | { | |
562 | *dst = *src; | |
563 | av_init_packet(src); | |
564 | } | |
565 | ||
566 | void av_packet_rescale_ts(AVPacket *pkt, AVRational src_tb, AVRational dst_tb) | |
567 | { | |
568 | if (pkt->pts != AV_NOPTS_VALUE) | |
569 | pkt->pts = av_rescale_q(pkt->pts, src_tb, dst_tb); | |
570 | if (pkt->dts != AV_NOPTS_VALUE) | |
571 | pkt->dts = av_rescale_q(pkt->dts, src_tb, dst_tb); | |
572 | if (pkt->duration > 0) | |
573 | pkt->duration = av_rescale_q(pkt->duration, src_tb, dst_tb); | |
574 | if (pkt->convergence_duration > 0) | |
575 | pkt->convergence_duration = av_rescale_q(pkt->convergence_duration, src_tb, dst_tb); | |
576 | } |