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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 | { | |
37 | av_free(pkt->data); | |
38 | pkt->data = NULL; | |
39 | pkt->size = 0; | |
40 | } | |
41 | ||
42 | /* a dummy destruct callback for the callers that assume AVPacket.destruct == | |
43 | * NULL => static data */ | |
44 | static void dummy_destruct_packet(AVPacket *pkt) | |
45 | { | |
46 | av_assert0(0); | |
47 | } | |
48 | #endif | |
49 | ||
50 | void av_init_packet(AVPacket *pkt) | |
51 | { | |
52 | pkt->pts = AV_NOPTS_VALUE; | |
53 | pkt->dts = AV_NOPTS_VALUE; | |
54 | pkt->pos = -1; | |
55 | pkt->duration = 0; | |
56 | pkt->convergence_duration = 0; | |
57 | pkt->flags = 0; | |
58 | pkt->stream_index = 0; | |
59 | #if FF_API_DESTRUCT_PACKET | |
60 | FF_DISABLE_DEPRECATION_WARNINGS | |
61 | pkt->destruct = NULL; | |
62 | FF_ENABLE_DEPRECATION_WARNINGS | |
63 | #endif | |
64 | pkt->buf = NULL; | |
65 | pkt->side_data = NULL; | |
66 | pkt->side_data_elems = 0; | |
67 | } | |
68 | ||
69 | static int packet_alloc(AVBufferRef **buf, int size) | |
70 | { | |
71 | int ret; | |
72 | if ((unsigned)size >= (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE) | |
73 | return AVERROR(EINVAL); | |
74 | ||
75 | ret = av_buffer_realloc(buf, size + FF_INPUT_BUFFER_PADDING_SIZE); | |
76 | if (ret < 0) | |
77 | return ret; | |
78 | ||
79 | memset((*buf)->data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE); | |
80 | ||
81 | return 0; | |
82 | } | |
83 | ||
84 | int av_new_packet(AVPacket *pkt, int size) | |
85 | { | |
86 | AVBufferRef *buf = NULL; | |
87 | int ret = packet_alloc(&buf, size); | |
88 | if (ret < 0) | |
89 | return ret; | |
90 | ||
91 | av_init_packet(pkt); | |
92 | pkt->buf = buf; | |
93 | pkt->data = buf->data; | |
94 | pkt->size = size; | |
95 | #if FF_API_DESTRUCT_PACKET | |
96 | FF_DISABLE_DEPRECATION_WARNINGS | |
97 | pkt->destruct = dummy_destruct_packet; | |
98 | FF_ENABLE_DEPRECATION_WARNINGS | |
99 | #endif | |
100 | ||
101 | return 0; | |
102 | } | |
103 | ||
104 | void av_shrink_packet(AVPacket *pkt, int size) | |
105 | { | |
106 | if (pkt->size <= size) | |
107 | return; | |
108 | pkt->size = size; | |
109 | memset(pkt->data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE); | |
110 | } | |
111 | ||
112 | int av_grow_packet(AVPacket *pkt, int grow_by) | |
113 | { | |
114 | int new_size; | |
115 | av_assert0((unsigned)pkt->size <= INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE); | |
116 | if (!pkt->size) | |
117 | return av_new_packet(pkt, grow_by); | |
118 | if ((unsigned)grow_by > | |
119 | INT_MAX - (pkt->size + FF_INPUT_BUFFER_PADDING_SIZE)) | |
120 | return -1; | |
121 | ||
122 | new_size = pkt->size + grow_by + FF_INPUT_BUFFER_PADDING_SIZE; | |
123 | if (pkt->buf) { | |
124 | int ret = av_buffer_realloc(&pkt->buf, new_size); | |
125 | if (ret < 0) | |
126 | return ret; | |
127 | } else { | |
128 | pkt->buf = av_buffer_alloc(new_size); | |
129 | if (!pkt->buf) | |
130 | return AVERROR(ENOMEM); | |
131 | memcpy(pkt->buf->data, pkt->data, FFMIN(pkt->size, pkt->size + grow_by)); | |
132 | #if FF_API_DESTRUCT_PACKET | |
133 | FF_DISABLE_DEPRECATION_WARNINGS | |
134 | pkt->destruct = dummy_destruct_packet; | |
135 | FF_ENABLE_DEPRECATION_WARNINGS | |
136 | #endif | |
137 | } | |
138 | pkt->data = pkt->buf->data; | |
139 | pkt->size += grow_by; | |
140 | memset(pkt->data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE); | |
141 | ||
142 | return 0; | |
143 | } | |
144 | ||
145 | int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size) | |
146 | { | |
147 | if (size >= INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE) | |
148 | return AVERROR(EINVAL); | |
149 | ||
150 | pkt->buf = av_buffer_create(data, size + FF_INPUT_BUFFER_PADDING_SIZE, | |
151 | av_buffer_default_free, NULL, 0); | |
152 | if (!pkt->buf) | |
153 | return AVERROR(ENOMEM); | |
154 | ||
155 | pkt->data = data; | |
156 | pkt->size = size; | |
157 | #if FF_API_DESTRUCT_PACKET | |
158 | FF_DISABLE_DEPRECATION_WARNINGS | |
159 | pkt->destruct = dummy_destruct_packet; | |
160 | FF_ENABLE_DEPRECATION_WARNINGS | |
161 | #endif | |
162 | ||
163 | return 0; | |
164 | } | |
165 | ||
166 | #define ALLOC_MALLOC(data, size) data = av_malloc(size) | |
167 | #define ALLOC_BUF(data, size) \ | |
168 | do { \ | |
169 | av_buffer_realloc(&pkt->buf, size); \ | |
170 | data = pkt->buf ? pkt->buf->data : NULL; \ | |
171 | } while (0) | |
172 | ||
173 | #define DUP_DATA(dst, src, size, padding, ALLOC) \ | |
174 | do { \ | |
175 | void *data; \ | |
176 | if (padding) { \ | |
177 | if ((unsigned)(size) > \ | |
178 | (unsigned)(size) + FF_INPUT_BUFFER_PADDING_SIZE) \ | |
179 | goto failed_alloc; \ | |
180 | ALLOC(data, size + FF_INPUT_BUFFER_PADDING_SIZE); \ | |
181 | } else { \ | |
182 | ALLOC(data, size); \ | |
183 | } \ | |
184 | if (!data) \ | |
185 | goto failed_alloc; \ | |
186 | memcpy(data, src, size); \ | |
187 | if (padding) \ | |
188 | memset((uint8_t *)data + size, 0, \ | |
189 | FF_INPUT_BUFFER_PADDING_SIZE); \ | |
190 | dst = data; \ | |
191 | } while (0) | |
192 | ||
193 | /* Makes duplicates of data, side_data, but does not copy any other fields */ | |
194 | static int copy_packet_data(AVPacket *pkt, const AVPacket *src, int dup) | |
195 | { | |
196 | pkt->data = NULL; | |
197 | pkt->side_data = NULL; | |
198 | if (pkt->buf) { | |
199 | AVBufferRef *ref = av_buffer_ref(src->buf); | |
200 | if (!ref) | |
201 | return AVERROR(ENOMEM); | |
202 | pkt->buf = ref; | |
203 | pkt->data = ref->data; | |
204 | } else { | |
205 | DUP_DATA(pkt->data, src->data, pkt->size, 1, ALLOC_BUF); | |
206 | } | |
207 | #if FF_API_DESTRUCT_PACKET | |
208 | FF_DISABLE_DEPRECATION_WARNINGS | |
209 | pkt->destruct = dummy_destruct_packet; | |
210 | FF_ENABLE_DEPRECATION_WARNINGS | |
211 | #endif | |
212 | if (pkt->side_data_elems && dup) | |
213 | pkt->side_data = src->side_data; | |
214 | if (pkt->side_data_elems && !dup) { | |
215 | return av_copy_packet_side_data(pkt, src); | |
216 | } | |
217 | return 0; | |
218 | ||
219 | failed_alloc: | |
220 | av_free_packet(pkt); | |
221 | return AVERROR(ENOMEM); | |
222 | } | |
223 | ||
224 | int av_copy_packet_side_data(AVPacket *pkt, const AVPacket *src) | |
225 | { | |
226 | if (src->side_data_elems) { | |
227 | int i; | |
228 | DUP_DATA(pkt->side_data, src->side_data, | |
229 | src->side_data_elems * sizeof(*src->side_data), 0, ALLOC_MALLOC); | |
230 | if (src != pkt) { | |
231 | memset(pkt->side_data, 0, | |
232 | src->side_data_elems * sizeof(*src->side_data)); | |
233 | } | |
234 | for (i = 0; i < src->side_data_elems; i++) { | |
235 | DUP_DATA(pkt->side_data[i].data, src->side_data[i].data, | |
236 | src->side_data[i].size, 1, ALLOC_MALLOC); | |
237 | pkt->side_data[i].size = src->side_data[i].size; | |
238 | pkt->side_data[i].type = src->side_data[i].type; | |
239 | } | |
240 | } | |
241 | pkt->side_data_elems = src->side_data_elems; | |
242 | return 0; | |
243 | ||
244 | failed_alloc: | |
245 | av_free_packet(pkt); | |
246 | return AVERROR(ENOMEM); | |
247 | } | |
248 | ||
249 | int av_dup_packet(AVPacket *pkt) | |
250 | { | |
251 | AVPacket tmp_pkt; | |
252 | ||
253 | FF_DISABLE_DEPRECATION_WARNINGS | |
254 | if (!pkt->buf && pkt->data | |
255 | #if FF_API_DESTRUCT_PACKET | |
256 | && !pkt->destruct | |
257 | #endif | |
258 | ) { | |
259 | FF_ENABLE_DEPRECATION_WARNINGS | |
260 | tmp_pkt = *pkt; | |
261 | return copy_packet_data(pkt, &tmp_pkt, 1); | |
262 | } | |
263 | return 0; | |
264 | } | |
265 | ||
266 | int av_copy_packet(AVPacket *dst, const AVPacket *src) | |
267 | { | |
268 | *dst = *src; | |
269 | return copy_packet_data(dst, src, 0); | |
270 | } | |
271 | ||
272 | void av_packet_free_side_data(AVPacket *pkt) | |
273 | { | |
274 | int i; | |
275 | for (i = 0; i < pkt->side_data_elems; i++) | |
276 | av_free(pkt->side_data[i].data); | |
277 | av_freep(&pkt->side_data); | |
278 | pkt->side_data_elems = 0; | |
279 | } | |
280 | ||
281 | void av_free_packet(AVPacket *pkt) | |
282 | { | |
283 | if (pkt) { | |
284 | FF_DISABLE_DEPRECATION_WARNINGS | |
285 | if (pkt->buf) | |
286 | av_buffer_unref(&pkt->buf); | |
287 | #if FF_API_DESTRUCT_PACKET | |
288 | else if (pkt->destruct) | |
289 | pkt->destruct(pkt); | |
290 | pkt->destruct = NULL; | |
291 | #endif | |
292 | FF_ENABLE_DEPRECATION_WARNINGS | |
293 | pkt->data = NULL; | |
294 | pkt->size = 0; | |
295 | ||
296 | av_packet_free_side_data(pkt); | |
297 | } | |
298 | } | |
299 | ||
300 | uint8_t *av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, | |
301 | int size) | |
302 | { | |
303 | int elems = pkt->side_data_elems; | |
304 | ||
305 | if ((unsigned)elems + 1 > INT_MAX / sizeof(*pkt->side_data)) | |
306 | return NULL; | |
307 | if ((unsigned)size > INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE) | |
308 | return NULL; | |
309 | ||
310 | pkt->side_data = av_realloc(pkt->side_data, | |
311 | (elems + 1) * sizeof(*pkt->side_data)); | |
312 | if (!pkt->side_data) | |
313 | return NULL; | |
314 | ||
315 | pkt->side_data[elems].data = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE); | |
316 | if (!pkt->side_data[elems].data) | |
317 | return NULL; | |
318 | pkt->side_data[elems].size = size; | |
319 | pkt->side_data[elems].type = type; | |
320 | pkt->side_data_elems++; | |
321 | ||
322 | return pkt->side_data[elems].data; | |
323 | } | |
324 | ||
325 | uint8_t *av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type, | |
326 | int *size) | |
327 | { | |
328 | int i; | |
329 | ||
330 | for (i = 0; i < pkt->side_data_elems; i++) { | |
331 | if (pkt->side_data[i].type == type) { | |
332 | if (size) | |
333 | *size = pkt->side_data[i].size; | |
334 | return pkt->side_data[i].data; | |
335 | } | |
336 | } | |
337 | return NULL; | |
338 | } | |
339 | ||
340 | #define FF_MERGE_MARKER 0x8c4d9d108e25e9feULL | |
341 | ||
342 | int av_packet_merge_side_data(AVPacket *pkt){ | |
343 | if(pkt->side_data_elems){ | |
344 | AVBufferRef *buf; | |
345 | int i; | |
346 | uint8_t *p; | |
347 | uint64_t size= pkt->size + 8LL + FF_INPUT_BUFFER_PADDING_SIZE; | |
348 | AVPacket old= *pkt; | |
349 | for (i=0; i<old.side_data_elems; i++) { | |
350 | size += old.side_data[i].size + 5LL; | |
351 | } | |
352 | if (size > INT_MAX) | |
353 | return AVERROR(EINVAL); | |
354 | buf = av_buffer_alloc(size); | |
355 | if (!buf) | |
356 | return AVERROR(ENOMEM); | |
357 | pkt->buf = buf; | |
358 | pkt->data = p = buf->data; | |
359 | #if FF_API_DESTRUCT_PACKET | |
360 | FF_DISABLE_DEPRECATION_WARNINGS | |
361 | pkt->destruct = dummy_destruct_packet; | |
362 | FF_ENABLE_DEPRECATION_WARNINGS | |
363 | #endif | |
364 | pkt->size = size - FF_INPUT_BUFFER_PADDING_SIZE; | |
365 | bytestream_put_buffer(&p, old.data, old.size); | |
366 | for (i=old.side_data_elems-1; i>=0; i--) { | |
367 | bytestream_put_buffer(&p, old.side_data[i].data, old.side_data[i].size); | |
368 | bytestream_put_be32(&p, old.side_data[i].size); | |
369 | *p++ = old.side_data[i].type | ((i==old.side_data_elems-1)*128); | |
370 | } | |
371 | bytestream_put_be64(&p, FF_MERGE_MARKER); | |
372 | av_assert0(p-pkt->data == pkt->size); | |
373 | memset(p, 0, FF_INPUT_BUFFER_PADDING_SIZE); | |
374 | av_free_packet(&old); | |
375 | pkt->side_data_elems = 0; | |
376 | pkt->side_data = NULL; | |
377 | return 1; | |
378 | } | |
379 | return 0; | |
380 | } | |
381 | ||
382 | int av_packet_split_side_data(AVPacket *pkt){ | |
383 | if (!pkt->side_data_elems && pkt->size >12 && AV_RB64(pkt->data + pkt->size - 8) == FF_MERGE_MARKER){ | |
384 | int i; | |
385 | unsigned int size; | |
386 | uint8_t *p; | |
387 | ||
388 | p = pkt->data + pkt->size - 8 - 5; | |
389 | for (i=1; ; i++){ | |
390 | size = AV_RB32(p); | |
391 | if (size>INT_MAX || p - pkt->data < size) | |
392 | return 0; | |
393 | if (p[4]&128) | |
394 | break; | |
395 | p-= size+5; | |
396 | } | |
397 | ||
398 | pkt->side_data = av_malloc_array(i, sizeof(*pkt->side_data)); | |
399 | if (!pkt->side_data) | |
400 | return AVERROR(ENOMEM); | |
401 | ||
402 | p= pkt->data + pkt->size - 8 - 5; | |
403 | for (i=0; ; i++){ | |
404 | size= AV_RB32(p); | |
405 | av_assert0(size<=INT_MAX && p - pkt->data >= size); | |
406 | pkt->side_data[i].data = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE); | |
407 | pkt->side_data[i].size = size; | |
408 | pkt->side_data[i].type = p[4]&127; | |
409 | if (!pkt->side_data[i].data) | |
410 | return AVERROR(ENOMEM); | |
411 | memcpy(pkt->side_data[i].data, p-size, size); | |
412 | pkt->size -= size + 5; | |
413 | if(p[4]&128) | |
414 | break; | |
415 | p-= size+5; | |
416 | } | |
417 | pkt->size -= 8; | |
418 | pkt->side_data_elems = i+1; | |
419 | return 1; | |
420 | } | |
421 | return 0; | |
422 | } | |
423 | ||
424 | uint8_t *av_packet_pack_dictionary(AVDictionary *dict, int *size) | |
425 | { | |
426 | AVDictionaryEntry *t = NULL; | |
427 | uint8_t *data = NULL; | |
428 | *size = 0; | |
429 | ||
430 | if (!dict) | |
431 | return NULL; | |
432 | ||
433 | while ((t = av_dict_get(dict, "", t, AV_DICT_IGNORE_SUFFIX))) { | |
434 | const size_t keylen = strlen(t->key); | |
435 | const size_t valuelen = strlen(t->value); | |
436 | const size_t new_size = *size + keylen + 1 + valuelen + 1; | |
437 | uint8_t *const new_data = av_realloc(data, new_size); | |
438 | ||
439 | if (!new_data) | |
440 | goto fail; | |
441 | data = new_data; | |
442 | if (new_size > INT_MAX) | |
443 | goto fail; | |
444 | ||
445 | memcpy(data + *size, t->key, keylen + 1); | |
446 | memcpy(data + *size + keylen + 1, t->value, valuelen + 1); | |
447 | ||
448 | *size = new_size; | |
449 | } | |
450 | ||
451 | return data; | |
452 | ||
453 | fail: | |
454 | av_freep(&data); | |
455 | *size = 0; | |
456 | return NULL; | |
457 | } | |
458 | ||
459 | int av_packet_unpack_dictionary(const uint8_t *data, int size, AVDictionary **dict) | |
460 | { | |
461 | const uint8_t *end = data + size; | |
462 | int ret = 0; | |
463 | ||
464 | if (!dict || !data || !size) | |
465 | return ret; | |
466 | if (size && end[-1]) | |
467 | return AVERROR_INVALIDDATA; | |
468 | while (data < end) { | |
469 | const uint8_t *key = data; | |
470 | const uint8_t *val = data + strlen(key) + 1; | |
471 | ||
472 | if (val >= end) | |
473 | return AVERROR_INVALIDDATA; | |
474 | ||
475 | ret = av_dict_set(dict, key, val, 0); | |
476 | if (ret < 0) | |
477 | break; | |
478 | data = val + strlen(val) + 1; | |
479 | } | |
480 | ||
481 | return ret; | |
482 | } | |
483 | ||
484 | int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type, | |
485 | int size) | |
486 | { | |
487 | int i; | |
488 | ||
489 | for (i = 0; i < pkt->side_data_elems; i++) { | |
490 | if (pkt->side_data[i].type == type) { | |
491 | if (size > pkt->side_data[i].size) | |
492 | return AVERROR(ENOMEM); | |
493 | pkt->side_data[i].size = size; | |
494 | return 0; | |
495 | } | |
496 | } | |
497 | return AVERROR(ENOENT); | |
498 | } | |
499 | ||
500 | int av_packet_copy_props(AVPacket *dst, const AVPacket *src) | |
501 | { | |
502 | int i; | |
503 | ||
504 | dst->pts = src->pts; | |
505 | dst->dts = src->dts; | |
506 | dst->pos = src->pos; | |
507 | dst->duration = src->duration; | |
508 | dst->convergence_duration = src->convergence_duration; | |
509 | dst->flags = src->flags; | |
510 | dst->stream_index = src->stream_index; | |
511 | ||
512 | for (i = 0; i < src->side_data_elems; i++) { | |
513 | enum AVPacketSideDataType type = src->side_data[i].type; | |
514 | int size = src->side_data[i].size; | |
515 | uint8_t *src_data = src->side_data[i].data; | |
516 | uint8_t *dst_data = av_packet_new_side_data(dst, type, size); | |
517 | ||
518 | if (!dst_data) { | |
519 | av_packet_free_side_data(dst); | |
520 | return AVERROR(ENOMEM); | |
521 | } | |
522 | memcpy(dst_data, src_data, size); | |
523 | } | |
524 | ||
525 | return 0; | |
526 | } | |
527 | ||
528 | void av_packet_unref(AVPacket *pkt) | |
529 | { | |
530 | av_packet_free_side_data(pkt); | |
531 | av_buffer_unref(&pkt->buf); | |
532 | av_init_packet(pkt); | |
533 | pkt->data = NULL; | |
534 | pkt->size = 0; | |
535 | } | |
536 | ||
537 | int av_packet_ref(AVPacket *dst, const AVPacket *src) | |
538 | { | |
539 | int ret; | |
540 | ||
541 | ret = av_packet_copy_props(dst, src); | |
542 | if (ret < 0) | |
543 | return ret; | |
544 | ||
545 | if (!src->buf) { | |
546 | ret = packet_alloc(&dst->buf, src->size); | |
547 | if (ret < 0) | |
548 | goto fail; | |
549 | memcpy(dst->buf->data, src->data, src->size); | |
550 | } else | |
551 | dst->buf = av_buffer_ref(src->buf); | |
552 | ||
553 | dst->size = src->size; | |
554 | dst->data = dst->buf->data; | |
555 | return 0; | |
556 | fail: | |
557 | av_packet_free_side_data(dst); | |
558 | return ret; | |
559 | } | |
560 | ||
561 | void av_packet_move_ref(AVPacket *dst, AVPacket *src) | |
562 | { | |
563 | *dst = *src; | |
564 | av_init_packet(src); | |
565 | } | |
566 | ||
567 | void av_packet_rescale_ts(AVPacket *pkt, AVRational src_tb, AVRational dst_tb) | |
568 | { | |
569 | if (pkt->pts != AV_NOPTS_VALUE) | |
570 | pkt->pts = av_rescale_q(pkt->pts, src_tb, dst_tb); | |
571 | if (pkt->dts != AV_NOPTS_VALUE) | |
572 | pkt->dts = av_rescale_q(pkt->dts, src_tb, dst_tb); | |
573 | if (pkt->duration > 0) | |
574 | pkt->duration = av_rescale_q(pkt->duration, src_tb, dst_tb); | |
575 | if (pkt->convergence_duration > 0) | |
576 | pkt->convergence_duration = av_rescale_q(pkt->convergence_duration, src_tb, dst_tb); | |
577 | } |