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
30 #include "bytestream.h"
31 #include "internal.h"
32 #include "packet.h"
33 #include "packet_internal.h"
34
av_init_packet(AVPacket * pkt)35 void av_init_packet(AVPacket *pkt)
36 {
37 pkt->pts = AV_NOPTS_VALUE;
38 pkt->dts = AV_NOPTS_VALUE;
39 pkt->pos = -1;
40 pkt->duration = 0;
41 #if FF_API_CONVERGENCE_DURATION
42 FF_DISABLE_DEPRECATION_WARNINGS
43 pkt->convergence_duration = 0;
44 FF_ENABLE_DEPRECATION_WARNINGS
45 #endif
46 pkt->flags = 0;
47 pkt->stream_index = 0;
48 pkt->buf = NULL;
49 pkt->side_data = NULL;
50 pkt->side_data_elems = 0;
51 }
52
av_packet_alloc(void)53 AVPacket *av_packet_alloc(void)
54 {
55 AVPacket *pkt = av_mallocz(sizeof(AVPacket));
56 if (!pkt)
57 return pkt;
58
59 av_init_packet(pkt);
60
61 return pkt;
62 }
63
av_packet_free(AVPacket ** pkt)64 void av_packet_free(AVPacket **pkt)
65 {
66 if (!pkt || !*pkt)
67 return;
68
69 av_packet_unref(*pkt);
70 av_freep(pkt);
71 }
72
packet_alloc(AVBufferRef ** buf,int size)73 static int packet_alloc(AVBufferRef **buf, int size)
74 {
75 int ret;
76 if (size < 0 || size >= INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
77 return AVERROR(EINVAL);
78
79 ret = av_buffer_realloc(buf, size + AV_INPUT_BUFFER_PADDING_SIZE);
80 if (ret < 0)
81 return ret;
82
83 memset((*buf)->data + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
84
85 return 0;
86 }
87
av_new_packet(AVPacket * pkt,int size)88 int av_new_packet(AVPacket *pkt, int size)
89 {
90 AVBufferRef *buf = NULL;
91 int ret = packet_alloc(&buf, size);
92 if (ret < 0)
93 return ret;
94
95 av_init_packet(pkt);
96 pkt->buf = buf;
97 pkt->data = buf->data;
98 pkt->size = size;
99
100 return 0;
101 }
102
av_shrink_packet(AVPacket * pkt,int size)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, AV_INPUT_BUFFER_PADDING_SIZE);
109 }
110
av_grow_packet(AVPacket * pkt,int grow_by)111 int av_grow_packet(AVPacket *pkt, int grow_by)
112 {
113 int new_size;
114 av_assert0((unsigned)pkt->size <= INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE);
115 if ((unsigned)grow_by >
116 INT_MAX - (pkt->size + AV_INPUT_BUFFER_PADDING_SIZE))
117 return AVERROR(ENOMEM);
118
119 new_size = pkt->size + grow_by + AV_INPUT_BUFFER_PADDING_SIZE;
120 if (pkt->buf) {
121 size_t data_offset;
122 uint8_t *old_data = pkt->data;
123 if (pkt->data == NULL) {
124 data_offset = 0;
125 pkt->data = pkt->buf->data;
126 } else {
127 data_offset = pkt->data - pkt->buf->data;
128 if (data_offset > INT_MAX - new_size)
129 return AVERROR(ENOMEM);
130 }
131
132 if (new_size + data_offset > pkt->buf->size ||
133 !av_buffer_is_writable(pkt->buf)) {
134 int ret = av_buffer_realloc(&pkt->buf, new_size + data_offset);
135 if (ret < 0) {
136 pkt->data = old_data;
137 return ret;
138 }
139 pkt->data = pkt->buf->data + data_offset;
140 }
141 } else {
142 pkt->buf = av_buffer_alloc(new_size);
143 if (!pkt->buf)
144 return AVERROR(ENOMEM);
145 if (pkt->size > 0)
146 memcpy(pkt->buf->data, pkt->data, pkt->size);
147 pkt->data = pkt->buf->data;
148 }
149 pkt->size += grow_by;
150 memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
151
152 return 0;
153 }
154
av_packet_from_data(AVPacket * pkt,uint8_t * data,int size)155 int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size)
156 {
157 if (size >= INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
158 return AVERROR(EINVAL);
159
160 pkt->buf = av_buffer_create(data, size + AV_INPUT_BUFFER_PADDING_SIZE,
161 av_buffer_default_free, NULL, 0);
162 if (!pkt->buf)
163 return AVERROR(ENOMEM);
164
165 pkt->data = data;
166 pkt->size = size;
167
168 return 0;
169 }
170
171 #if FF_API_AVPACKET_OLD_API
172 FF_DISABLE_DEPRECATION_WARNINGS
173 #define ALLOC_MALLOC(data, size) data = av_malloc(size)
174 #define ALLOC_BUF(data, size) \
175 do { \
176 av_buffer_realloc(&pkt->buf, size); \
177 data = pkt->buf ? pkt->buf->data : NULL; \
178 } while (0)
179
180 #define DUP_DATA(dst, src, size, padding, ALLOC) \
181 do { \
182 void *data; \
183 if (padding) { \
184 if ((unsigned)(size) > \
185 (unsigned)(size) + AV_INPUT_BUFFER_PADDING_SIZE) \
186 goto failed_alloc; \
187 ALLOC(data, size + AV_INPUT_BUFFER_PADDING_SIZE); \
188 } else { \
189 ALLOC(data, size); \
190 } \
191 if (!data) \
192 goto failed_alloc; \
193 memcpy(data, src, size); \
194 if (padding) \
195 memset((uint8_t *)data + size, 0, \
196 AV_INPUT_BUFFER_PADDING_SIZE); \
197 dst = data; \
198 } while (0)
199
200 /* Makes duplicates of data, side_data, but does not copy any other fields */
copy_packet_data(AVPacket * pkt,const AVPacket * src,int dup)201 static int copy_packet_data(AVPacket *pkt, const AVPacket *src, int dup)
202 {
203 pkt->data = NULL;
204 pkt->side_data = NULL;
205 pkt->side_data_elems = 0;
206 if (pkt->buf) {
207 AVBufferRef *ref = av_buffer_ref(src->buf);
208 if (!ref)
209 return AVERROR(ENOMEM);
210 pkt->buf = ref;
211 pkt->data = ref->data;
212 } else {
213 DUP_DATA(pkt->data, src->data, pkt->size, 1, ALLOC_BUF);
214 }
215 if (src->side_data_elems && dup) {
216 pkt->side_data = src->side_data;
217 pkt->side_data_elems = src->side_data_elems;
218 }
219 if (src->side_data_elems && !dup) {
220 return av_copy_packet_side_data(pkt, src);
221 }
222 return 0;
223
224 failed_alloc:
225 av_packet_unref(pkt);
226 return AVERROR(ENOMEM);
227 }
228
av_copy_packet_side_data(AVPacket * pkt,const AVPacket * src)229 int av_copy_packet_side_data(AVPacket *pkt, const AVPacket *src)
230 {
231 if (src->side_data_elems) {
232 int i;
233 DUP_DATA(pkt->side_data, src->side_data,
234 src->side_data_elems * sizeof(*src->side_data), 0, ALLOC_MALLOC);
235 if (src != pkt) {
236 memset(pkt->side_data, 0,
237 src->side_data_elems * sizeof(*src->side_data));
238 }
239 for (i = 0; i < src->side_data_elems; i++) {
240 DUP_DATA(pkt->side_data[i].data, src->side_data[i].data,
241 src->side_data[i].size, 1, ALLOC_MALLOC);
242 pkt->side_data[i].size = src->side_data[i].size;
243 pkt->side_data[i].type = src->side_data[i].type;
244 }
245 }
246 pkt->side_data_elems = src->side_data_elems;
247 return 0;
248
249 failed_alloc:
250 av_packet_unref(pkt);
251 return AVERROR(ENOMEM);
252 }
253
av_dup_packet(AVPacket * pkt)254 int av_dup_packet(AVPacket *pkt)
255 {
256 AVPacket tmp_pkt;
257
258 if (!pkt->buf && pkt->data) {
259 tmp_pkt = *pkt;
260 return copy_packet_data(pkt, &tmp_pkt, 1);
261 }
262 return 0;
263 }
264
av_copy_packet(AVPacket * dst,const AVPacket * src)265 int av_copy_packet(AVPacket *dst, const AVPacket *src)
266 {
267 *dst = *src;
268 return copy_packet_data(dst, src, 0);
269 }
270 FF_ENABLE_DEPRECATION_WARNINGS
271 #endif
272
av_packet_free_side_data(AVPacket * pkt)273 void av_packet_free_side_data(AVPacket *pkt)
274 {
275 int i;
276 for (i = 0; i < pkt->side_data_elems; i++)
277 av_freep(&pkt->side_data[i].data);
278 av_freep(&pkt->side_data);
279 pkt->side_data_elems = 0;
280 }
281
282 #if FF_API_AVPACKET_OLD_API
283 FF_DISABLE_DEPRECATION_WARNINGS
av_free_packet(AVPacket * pkt)284 void av_free_packet(AVPacket *pkt)
285 {
286 if (pkt) {
287 if (pkt->buf)
288 av_buffer_unref(&pkt->buf);
289 pkt->data = NULL;
290 pkt->size = 0;
291
292 av_packet_free_side_data(pkt);
293 }
294 }
295 FF_ENABLE_DEPRECATION_WARNINGS
296 #endif
297
av_packet_add_side_data(AVPacket * pkt,enum AVPacketSideDataType type,uint8_t * data,size_t size)298 int av_packet_add_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
299 uint8_t *data, size_t size)
300 {
301 AVPacketSideData *tmp;
302 int i, elems = pkt->side_data_elems;
303
304 for (i = 0; i < elems; i++) {
305 AVPacketSideData *sd = &pkt->side_data[i];
306
307 if (sd->type == type) {
308 av_free(sd->data);
309 sd->data = data;
310 sd->size = size;
311 return 0;
312 }
313 }
314
315 if ((unsigned)elems + 1 > AV_PKT_DATA_NB)
316 return AVERROR(ERANGE);
317
318 tmp = av_realloc(pkt->side_data, (elems + 1) * sizeof(*tmp));
319 if (!tmp)
320 return AVERROR(ENOMEM);
321
322 pkt->side_data = tmp;
323 pkt->side_data[elems].data = data;
324 pkt->side_data[elems].size = size;
325 pkt->side_data[elems].type = type;
326 pkt->side_data_elems++;
327
328 return 0;
329 }
330
331
av_packet_new_side_data(AVPacket * pkt,enum AVPacketSideDataType type,int size)332 uint8_t *av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
333 int size)
334 {
335 int ret;
336 uint8_t *data;
337
338 if ((unsigned)size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
339 return NULL;
340 data = av_mallocz(size + AV_INPUT_BUFFER_PADDING_SIZE);
341 if (!data)
342 return NULL;
343
344 ret = av_packet_add_side_data(pkt, type, data, size);
345 if (ret < 0) {
346 av_freep(&data);
347 return NULL;
348 }
349
350 return data;
351 }
352
av_packet_get_side_data(const AVPacket * pkt,enum AVPacketSideDataType type,int * size)353 uint8_t *av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type,
354 int *size)
355 {
356 int i;
357
358 for (i = 0; i < pkt->side_data_elems; i++) {
359 if (pkt->side_data[i].type == type) {
360 if (size)
361 *size = pkt->side_data[i].size;
362 return pkt->side_data[i].data;
363 }
364 }
365 if (size)
366 *size = 0;
367 return NULL;
368 }
369
av_packet_side_data_name(enum AVPacketSideDataType type)370 const char *av_packet_side_data_name(enum AVPacketSideDataType type)
371 {
372 switch(type) {
373 case AV_PKT_DATA_PALETTE: return "Palette";
374 case AV_PKT_DATA_NEW_EXTRADATA: return "New Extradata";
375 case AV_PKT_DATA_PARAM_CHANGE: return "Param Change";
376 case AV_PKT_DATA_H263_MB_INFO: return "H263 MB Info";
377 case AV_PKT_DATA_REPLAYGAIN: return "Replay Gain";
378 case AV_PKT_DATA_DISPLAYMATRIX: return "Display Matrix";
379 case AV_PKT_DATA_STEREO3D: return "Stereo 3D";
380 case AV_PKT_DATA_AUDIO_SERVICE_TYPE: return "Audio Service Type";
381 case AV_PKT_DATA_QUALITY_STATS: return "Quality stats";
382 case AV_PKT_DATA_FALLBACK_TRACK: return "Fallback track";
383 case AV_PKT_DATA_CPB_PROPERTIES: return "CPB properties";
384 case AV_PKT_DATA_SKIP_SAMPLES: return "Skip Samples";
385 case AV_PKT_DATA_JP_DUALMONO: return "JP Dual Mono";
386 case AV_PKT_DATA_STRINGS_METADATA: return "Strings Metadata";
387 case AV_PKT_DATA_SUBTITLE_POSITION: return "Subtitle Position";
388 case AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL: return "Matroska BlockAdditional";
389 case AV_PKT_DATA_WEBVTT_IDENTIFIER: return "WebVTT ID";
390 case AV_PKT_DATA_WEBVTT_SETTINGS: return "WebVTT Settings";
391 case AV_PKT_DATA_METADATA_UPDATE: return "Metadata Update";
392 case AV_PKT_DATA_MPEGTS_STREAM_ID: return "MPEGTS Stream ID";
393 case AV_PKT_DATA_MASTERING_DISPLAY_METADATA: return "Mastering display metadata";
394 case AV_PKT_DATA_CONTENT_LIGHT_LEVEL: return "Content light level metadata";
395 case AV_PKT_DATA_SPHERICAL: return "Spherical Mapping";
396 case AV_PKT_DATA_A53_CC: return "A53 Closed Captions";
397 case AV_PKT_DATA_ENCRYPTION_INIT_INFO: return "Encryption initialization data";
398 case AV_PKT_DATA_ENCRYPTION_INFO: return "Encryption info";
399 case AV_PKT_DATA_AFD: return "Active Format Description data";
400 case AV_PKT_DATA_PRFT: return "Producer Reference Time";
401 case AV_PKT_DATA_ICC_PROFILE: return "ICC Profile";
402 case AV_PKT_DATA_DOVI_CONF: return "DOVI configuration record";
403 }
404 return NULL;
405 }
406
407 #if FF_API_MERGE_SD_API
408
409 #define FF_MERGE_MARKER 0x8c4d9d108e25e9feULL
410
av_packet_merge_side_data(AVPacket * pkt)411 int av_packet_merge_side_data(AVPacket *pkt){
412 if(pkt->side_data_elems){
413 AVBufferRef *buf;
414 int i;
415 uint8_t *p;
416 uint64_t size= pkt->size + 8LL + AV_INPUT_BUFFER_PADDING_SIZE;
417 AVPacket old= *pkt;
418 for (i=0; i<old.side_data_elems; i++) {
419 size += old.side_data[i].size + 5LL;
420 }
421 if (size > INT_MAX)
422 return AVERROR(EINVAL);
423 buf = av_buffer_alloc(size);
424 if (!buf)
425 return AVERROR(ENOMEM);
426 pkt->buf = buf;
427 pkt->data = p = buf->data;
428 pkt->size = size - AV_INPUT_BUFFER_PADDING_SIZE;
429 bytestream_put_buffer(&p, old.data, old.size);
430 for (i=old.side_data_elems-1; i>=0; i--) {
431 bytestream_put_buffer(&p, old.side_data[i].data, old.side_data[i].size);
432 bytestream_put_be32(&p, old.side_data[i].size);
433 *p++ = old.side_data[i].type | ((i==old.side_data_elems-1)*128);
434 }
435 bytestream_put_be64(&p, FF_MERGE_MARKER);
436 av_assert0(p-pkt->data == pkt->size);
437 memset(p, 0, AV_INPUT_BUFFER_PADDING_SIZE);
438 av_packet_unref(&old);
439 pkt->side_data_elems = 0;
440 pkt->side_data = NULL;
441 return 1;
442 }
443 return 0;
444 }
445
av_packet_split_side_data(AVPacket * pkt)446 int av_packet_split_side_data(AVPacket *pkt){
447 if (!pkt->side_data_elems && pkt->size >12 && AV_RB64(pkt->data + pkt->size - 8) == FF_MERGE_MARKER){
448 int i;
449 unsigned int size;
450 uint8_t *p;
451
452 p = pkt->data + pkt->size - 8 - 5;
453 for (i=1; ; i++){
454 size = AV_RB32(p);
455 if (size>INT_MAX - 5 || p - pkt->data < size)
456 return 0;
457 if (p[4]&128)
458 break;
459 if (p - pkt->data < size + 5)
460 return 0;
461 p-= size+5;
462 }
463
464 if (i > AV_PKT_DATA_NB)
465 return AVERROR(ERANGE);
466
467 pkt->side_data = av_malloc_array(i, sizeof(*pkt->side_data));
468 if (!pkt->side_data)
469 return AVERROR(ENOMEM);
470
471 p= pkt->data + pkt->size - 8 - 5;
472 for (i=0; ; i++){
473 size= AV_RB32(p);
474 av_assert0(size<=INT_MAX - 5 && p - pkt->data >= size);
475 pkt->side_data[i].data = av_mallocz(size + AV_INPUT_BUFFER_PADDING_SIZE);
476 pkt->side_data[i].size = size;
477 pkt->side_data[i].type = p[4]&127;
478 if (!pkt->side_data[i].data)
479 return AVERROR(ENOMEM);
480 memcpy(pkt->side_data[i].data, p-size, size);
481 pkt->size -= size + 5;
482 if(p[4]&128)
483 break;
484 p-= size+5;
485 }
486 pkt->size -= 8;
487 pkt->side_data_elems = i+1;
488 return 1;
489 }
490 return 0;
491 }
492 #endif
493
av_packet_pack_dictionary(AVDictionary * dict,int * size)494 uint8_t *av_packet_pack_dictionary(AVDictionary *dict, int *size)
495 {
496 AVDictionaryEntry *t = NULL;
497 uint8_t *data = NULL;
498 *size = 0;
499
500 if (!dict)
501 return NULL;
502
503 while ((t = av_dict_get(dict, "", t, AV_DICT_IGNORE_SUFFIX))) {
504 const size_t keylen = strlen(t->key);
505 const size_t valuelen = strlen(t->value);
506 const size_t new_size = *size + keylen + 1 + valuelen + 1;
507 uint8_t *const new_data = av_realloc(data, new_size);
508
509 if (!new_data)
510 goto fail;
511 data = new_data;
512 if (new_size > INT_MAX)
513 goto fail;
514
515 memcpy(data + *size, t->key, keylen + 1);
516 memcpy(data + *size + keylen + 1, t->value, valuelen + 1);
517
518 *size = new_size;
519 }
520
521 return data;
522
523 fail:
524 av_freep(&data);
525 *size = 0;
526 return NULL;
527 }
528
av_packet_unpack_dictionary(const uint8_t * data,int size,AVDictionary ** dict)529 int av_packet_unpack_dictionary(const uint8_t *data, int size, AVDictionary **dict)
530 {
531 const uint8_t *end;
532 int ret;
533
534 if (!dict || !data || !size)
535 return 0;
536 end = data + size;
537 if (size && end[-1])
538 return AVERROR_INVALIDDATA;
539 while (data < end) {
540 const uint8_t *key = data;
541 const uint8_t *val = data + strlen(key) + 1;
542
543 if (val >= end || !*key)
544 return AVERROR_INVALIDDATA;
545
546 ret = av_dict_set(dict, key, val, 0);
547 if (ret < 0)
548 return ret;
549 data = val + strlen(val) + 1;
550 }
551
552 return 0;
553 }
554
av_packet_shrink_side_data(AVPacket * pkt,enum AVPacketSideDataType type,int size)555 int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
556 int size)
557 {
558 int i;
559
560 for (i = 0; i < pkt->side_data_elems; i++) {
561 if (pkt->side_data[i].type == type) {
562 if (size > pkt->side_data[i].size)
563 return AVERROR(ENOMEM);
564 pkt->side_data[i].size = size;
565 return 0;
566 }
567 }
568 return AVERROR(ENOENT);
569 }
570
av_packet_copy_props(AVPacket * dst,const AVPacket * src)571 int av_packet_copy_props(AVPacket *dst, const AVPacket *src)
572 {
573 int i;
574
575 dst->pts = src->pts;
576 dst->dts = src->dts;
577 dst->pos = src->pos;
578 dst->duration = src->duration;
579 #if FF_API_CONVERGENCE_DURATION
580 FF_DISABLE_DEPRECATION_WARNINGS
581 dst->convergence_duration = src->convergence_duration;
582 FF_ENABLE_DEPRECATION_WARNINGS
583 #endif
584 dst->flags = src->flags;
585 dst->stream_index = src->stream_index;
586
587 dst->side_data = NULL;
588 dst->side_data_elems = 0;
589 for (i = 0; i < src->side_data_elems; i++) {
590 enum AVPacketSideDataType type = src->side_data[i].type;
591 int size = src->side_data[i].size;
592 uint8_t *src_data = src->side_data[i].data;
593 uint8_t *dst_data = av_packet_new_side_data(dst, type, size);
594
595 if (!dst_data) {
596 av_packet_free_side_data(dst);
597 return AVERROR(ENOMEM);
598 }
599 memcpy(dst_data, src_data, size);
600 }
601
602 return 0;
603 }
604
av_packet_unref(AVPacket * pkt)605 void av_packet_unref(AVPacket *pkt)
606 {
607 av_packet_free_side_data(pkt);
608 av_buffer_unref(&pkt->buf);
609 av_init_packet(pkt);
610 pkt->data = NULL;
611 pkt->size = 0;
612 }
613
av_packet_ref(AVPacket * dst,const AVPacket * src)614 int av_packet_ref(AVPacket *dst, const AVPacket *src)
615 {
616 int ret;
617
618 dst->buf = NULL;
619
620 ret = av_packet_copy_props(dst, src);
621 if (ret < 0)
622 goto fail;
623
624 if (!src->buf) {
625 ret = packet_alloc(&dst->buf, src->size);
626 if (ret < 0)
627 goto fail;
628 av_assert1(!src->size || src->data);
629 if (src->size)
630 memcpy(dst->buf->data, src->data, src->size);
631
632 dst->data = dst->buf->data;
633 } else {
634 dst->buf = av_buffer_ref(src->buf);
635 if (!dst->buf) {
636 ret = AVERROR(ENOMEM);
637 goto fail;
638 }
639 dst->data = src->data;
640 }
641
642 dst->size = src->size;
643
644 return 0;
645 fail:
646 av_packet_unref(dst);
647 return ret;
648 }
649
av_packet_clone(const AVPacket * src)650 AVPacket *av_packet_clone(const AVPacket *src)
651 {
652 AVPacket *ret = av_packet_alloc();
653
654 if (!ret)
655 return ret;
656
657 if (av_packet_ref(ret, src))
658 av_packet_free(&ret);
659
660 return ret;
661 }
662
av_packet_move_ref(AVPacket * dst,AVPacket * src)663 void av_packet_move_ref(AVPacket *dst, AVPacket *src)
664 {
665 *dst = *src;
666 av_init_packet(src);
667 src->data = NULL;
668 src->size = 0;
669 }
670
av_packet_make_refcounted(AVPacket * pkt)671 int av_packet_make_refcounted(AVPacket *pkt)
672 {
673 int ret;
674
675 if (pkt->buf)
676 return 0;
677
678 ret = packet_alloc(&pkt->buf, pkt->size);
679 if (ret < 0)
680 return ret;
681 av_assert1(!pkt->size || pkt->data);
682 if (pkt->size)
683 memcpy(pkt->buf->data, pkt->data, pkt->size);
684
685 pkt->data = pkt->buf->data;
686
687 return 0;
688 }
689
av_packet_make_writable(AVPacket * pkt)690 int av_packet_make_writable(AVPacket *pkt)
691 {
692 AVBufferRef *buf = NULL;
693 int ret;
694
695 if (pkt->buf && av_buffer_is_writable(pkt->buf))
696 return 0;
697
698 ret = packet_alloc(&buf, pkt->size);
699 if (ret < 0)
700 return ret;
701 av_assert1(!pkt->size || pkt->data);
702 if (pkt->size)
703 memcpy(buf->data, pkt->data, pkt->size);
704
705 av_buffer_unref(&pkt->buf);
706 pkt->buf = buf;
707 pkt->data = buf->data;
708
709 return 0;
710 }
711
av_packet_rescale_ts(AVPacket * pkt,AVRational src_tb,AVRational dst_tb)712 void av_packet_rescale_ts(AVPacket *pkt, AVRational src_tb, AVRational dst_tb)
713 {
714 if (pkt->pts != AV_NOPTS_VALUE)
715 pkt->pts = av_rescale_q(pkt->pts, src_tb, dst_tb);
716 if (pkt->dts != AV_NOPTS_VALUE)
717 pkt->dts = av_rescale_q(pkt->dts, src_tb, dst_tb);
718 if (pkt->duration > 0)
719 pkt->duration = av_rescale_q(pkt->duration, src_tb, dst_tb);
720 #if FF_API_CONVERGENCE_DURATION
721 FF_DISABLE_DEPRECATION_WARNINGS
722 if (pkt->convergence_duration > 0)
723 pkt->convergence_duration = av_rescale_q(pkt->convergence_duration, src_tb, dst_tb);
724 FF_ENABLE_DEPRECATION_WARNINGS
725 #endif
726 }
727
ff_side_data_set_encoder_stats(AVPacket * pkt,int quality,int64_t * error,int error_count,int pict_type)728 int ff_side_data_set_encoder_stats(AVPacket *pkt, int quality, int64_t *error, int error_count, int pict_type)
729 {
730 uint8_t *side_data;
731 int side_data_size;
732 int i;
733
734 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_QUALITY_STATS, &side_data_size);
735 if (!side_data) {
736 side_data_size = 4+4+8*error_count;
737 side_data = av_packet_new_side_data(pkt, AV_PKT_DATA_QUALITY_STATS,
738 side_data_size);
739 }
740
741 if (!side_data || side_data_size < 4+4+8*error_count)
742 return AVERROR(ENOMEM);
743
744 AV_WL32(side_data , quality );
745 side_data[4] = pict_type;
746 side_data[5] = error_count;
747 for (i = 0; i<error_count; i++)
748 AV_WL64(side_data+8 + 8*i , error[i]);
749
750 return 0;
751 }
752
ff_side_data_set_prft(AVPacket * pkt,int64_t timestamp)753 int ff_side_data_set_prft(AVPacket *pkt, int64_t timestamp)
754 {
755 AVProducerReferenceTime *prft;
756 uint8_t *side_data;
757 int side_data_size;
758
759 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_PRFT, &side_data_size);
760 if (!side_data) {
761 side_data_size = sizeof(AVProducerReferenceTime);
762 side_data = av_packet_new_side_data(pkt, AV_PKT_DATA_PRFT, side_data_size);
763 }
764
765 if (!side_data || side_data_size < sizeof(AVProducerReferenceTime))
766 return AVERROR(ENOMEM);
767
768 prft = (AVProducerReferenceTime *)side_data;
769 prft->wallclock = timestamp;
770 prft->flags = 0;
771
772 return 0;
773 }
774