FFmpeg  4.3
avpacket.c
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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 
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
43  pkt->convergence_duration = 0;
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 
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 
65 {
66  if (!pkt || !*pkt)
67  return;
68 
69  av_packet_unref(*pkt);
70  av_freep(pkt);
71 }
72 
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 
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 
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 
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 
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 
156 {
157  if (size >= INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
158  return AVERROR(EINVAL);
159 
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
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 */
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 
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 
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 
266 {
267  *dst = *src;
268  return copy_packet_data(dst, src, 0);
269 }
271 #endif
272 
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
285 {
286  if (pkt) {
287  if (pkt->buf)
288  av_buffer_unref(&pkt->buf);
289  pkt->data = NULL;
290  pkt->size = 0;
291 
293  }
294 }
296 #endif
297 
299  uint8_t *data, size_t size)
300 {
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 
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;
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 
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 
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 
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 
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);
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 
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 
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 
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 
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
581  dst->convergence_duration = src->convergence_duration;
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++) {
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) {
597  return AVERROR(ENOMEM);
598  }
599  memcpy(dst_data, src_data, size);
600  }
601 
602  return 0;
603 }
604 
606 {
608  av_buffer_unref(&pkt->buf);
609  av_init_packet(pkt);
610  pkt->data = NULL;
611  pkt->size = 0;
612 }
613 
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 
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 
664 {
665  *dst = *src;
666  av_init_packet(src);
667  src->data = NULL;
668  src->size = 0;
669 }
670 
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 
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 
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
722  if (pkt->convergence_duration > 0)
723  pkt->convergence_duration = av_rescale_q(pkt->convergence_duration, src_tb, dst_tb);
725 #endif
726 }
727 
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;
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 
753 int ff_side_data_set_prft(AVPacket *pkt, int64_t timestamp)
754 {
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 }
#define NULL
Definition: coverity.c:32
#define DUP_DATA(dst, src, size, padding, ALLOC)
Definition: avpacket.c:180
Producer Reference Time data corresponding to the AVProducerReferenceTime struct, usually exported by...
Definition: packet.h:268
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:135
AVPacketSideDataType
Definition: packet.h:40
A list of zero terminated key/value strings.
Definition: packet.h:209
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it...
Definition: buffer.c:125
int size
The optional first identifier line of a WebVTT cue.
Definition: packet.h:196
int ff_side_data_set_encoder_stats(AVPacket *pkt, int quality, int64_t *error, int error_count, int pict_type)
Definition: avpacket.c:728
Memory handling functions.
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:375
#define AV_RB64
Definition: intreadwrite.h:164
void av_shrink_packet(AVPacket *pkt, int size)
Reduce packet size, correctly zeroing padding.
Definition: avpacket.c:103
Subtitle event position.
Definition: packet.h:183
#define ALLOC_MALLOC(data, size)
Definition: avpacket.c:173
This side data should be associated with a video stream and contains Stereoscopic 3D information in f...
Definition: packet.h:114
ATSC A53 Part 4 Closed Captions.
Definition: packet.h:242
int size
Definition: packet.h:356
This side data contains an integer value representing the stream index of a "fallback" track...
Definition: packet.h:140
#define ALLOC_BUF(data, size)
Definition: avpacket.c:174
const char * key
static AVPacket pkt
static void error(const char *err)
An AV_PKT_DATA_H263_MB_INFO side data packet contains a number of structures with info about macroblo...
Definition: packet.h:93
Mastering display metadata (based on SMPTE-2086:2014).
Definition: packet.h:222
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
void av_packet_free(AVPacket **pkt)
Free the packet, if the packet is reference counted, it will be unreferenced first.
Definition: avpacket.c:64
uint8_t
int av_packet_unpack_dictionary(const uint8_t *data, int size, AVDictionary **dict)
Unpack a dictionary from side_data.
Definition: avpacket.c:529
int av_packet_split_side_data(AVPacket *pkt)
Definition: avpacket.c:446
#define AV_RB32
Definition: intreadwrite.h:130
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:373
This side data contains a 3x3 transformation matrix describing an affine transformation that needs to...
Definition: packet.h:108
int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size)
Initialize a reference-counted packet from av_malloc()ed data.
Definition: avpacket.c:155
int av_packet_merge_side_data(AVPacket *pkt)
Definition: avpacket.c:411
const char data[16]
Definition: mxf.c:91
int64_t wallclock
A UTC timestamp, in microseconds, since Unix epoch (e.g, av_gettime()).
Definition: avcodec.h:502
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:40
uint8_t * data
Definition: packet.h:355
This side data is encryption initialization data.
Definition: packet.h:249
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
Definition: avpacket.c:663
uint8_t * data
Definition: packet.h:299
int av_packet_ref(AVPacket *dst, const AVPacket *src)
Setup a new reference to the data described by a given packet.
Definition: avpacket.c:614
int av_packet_make_writable(AVPacket *pkt)
Create a writable reference for the data described by a given packet, avoiding data copy if possible...
Definition: avpacket.c:690
void av_buffer_default_free(void *opaque, uint8_t *data)
Default free callback, which calls av_free() on the buffer data.
Definition: buffer.c:62
MPEGTS stream ID as uint8_t, this is required to pass the stream ID information from the demuxer to t...
Definition: packet.h:215
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
#define src
Definition: vp8dsp.c:254
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:88
#define AV_WL64(p, v)
Definition: intreadwrite.h:440
DOVI configuration ref: dolby-vision-bitstreams-within-the-iso-base-media-file-format-v2.1.2, section 2.2 dolby-vision-bitstreams-in-mpeg-2-transport-stream-multiplex-v1.2, section 3.3 Tags are stored in struct AVDOVIDecoderConfigurationRecord.
Definition: packet.h:283
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE bytes worth of palette...
Definition: packet.h:46
AVPacket * av_packet_clone(const AVPacket *src)
Create a new packet that references the same data as src.
Definition: avpacket.c:650
void av_packet_rescale_ts(AVPacket *pkt, AVRational src_tb, AVRational dst_tb)
Convert valid timing fields (timestamps / durations) in a packet from one timebase to another...
Definition: avpacket.c:712
An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows:
Definition: packet.h:72
#define AVERROR(e)
Definition: error.h:43
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, int *size)
Get side information from packet.
Definition: avpacket.c:353
FF_ENABLE_DEPRECATION_WARNINGS void av_packet_free_side_data(AVPacket *pkt)
Convenience function to free all the side data stored.
Definition: avpacket.c:273
ICC profile data consisting of an opaque octet buffer following the format described by ISO 15076-1...
Definition: packet.h:274
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: packet.h:338
simple assert() macros that are a bit more flexible than ISO C assert().
enum AVPacketSideDataType type
Definition: packet.h:301
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:239
int side_data_elems
Definition: packet.h:367
AVBufferRef * av_buffer_create(uint8_t *data, int size, void(*free)(void *opaque, uint8_t *data), void *opaque, int flags)
Create an AVBuffer from an existing array.
Definition: buffer.c:29
int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Shrink the already allocated side data buffer.
Definition: avpacket.c:555
int av_buffer_realloc(AVBufferRef **pbuf, int size)
Reallocate a given buffer.
Definition: buffer.c:169
#define fail()
Definition: checkasm.h:123
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:361
int av_copy_packet_side_data(AVPacket *pkt, const AVPacket *src)
Definition: avpacket.c:229
common internal API header
int av_packet_copy_props(AVPacket *dst, const AVPacket *src)
Copy only "properties" fields from src to dst.
Definition: avpacket.c:571
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
This side data contains quality related information from the encoder.
Definition: packet.h:132
static int packet_alloc(AVBufferRef **buf, int size)
Definition: avpacket.c:73
int av_packet_make_refcounted(AVPacket *pkt)
Ensure the data described by a given packet is reference counted.
Definition: avpacket.c:671
This side data should be associated with a video stream and corresponds to the AVSphericalMapping str...
Definition: packet.h:228
Active Format Description data consisting of a single byte as specified in ETSI TS 101 154 using AVAc...
Definition: packet.h:261
int av_buffer_is_writable(const AVBufferRef *buf)
Definition: buffer.c:133
Content light level (based on CTA-861.3).
Definition: packet.h:235
The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format that the extradata buffer was...
Definition: packet.h:55
A list of zero terminated key/value strings.
Definition: packet.h:172
AVBufferRef * av_buffer_alloc(int size)
Allocate an AVBuffer of the given size using av_malloc().
Definition: buffer.c:67
uint8_t * av_packet_pack_dictionary(AVDictionary *dict, int *size)
Pack a dictionary for use in side_data.
Definition: avpacket.c:494
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:605
uint8_t * data
The data buffer.
Definition: buffer.h:89
Data found in BlockAdditional element of matroska container.
Definition: packet.h:191
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
Rational number (pair of numerator and denominator).
Definition: rational.h:58
Recommmends skipping the specified number of samples.
Definition: packet.h:156
FF_ENABLE_DEPRECATION_WARNINGS int av_packet_add_side_data(AVPacket *pkt, enum AVPacketSideDataType type, uint8_t *data, size_t size)
Wrap an existing array as a packet side data.
Definition: avpacket.c:298
cl_device_type type
FF_DISABLE_DEPRECATION_WARNINGS void av_free_packet(AVPacket *pkt)
Definition: avpacket.c:284
This side data contains encryption info for how to decrypt the packet.
Definition: packet.h:255
static int copy_packet_data(AVPacket *pkt, const AVPacket *src, int dup)
Definition: avpacket.c:201
int size
Size of data in bytes.
Definition: buffer.h:93
int av_copy_packet(AVPacket *dst, const AVPacket *src)
Definition: avpacket.c:265
This side data should be associated with an audio stream and contains ReplayGain information in form ...
Definition: packet.h:99
#define FF_MERGE_MARKER
Definition: avpacket.c:409
A reference to a data buffer.
Definition: buffer.h:81
An AV_PKT_DATA_JP_DUALMONO side data packet indicates that the packet may contain "dual mono" audio s...
Definition: packet.h:166
AVPacketSideData * side_data
Additional packet data that can be provided by the container.
Definition: packet.h:366
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:84
common internal api header.
common internal and external API header
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
AVBufferRef * av_buffer_ref(AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:93
int av_grow_packet(AVPacket *pkt, int grow_by)
Increase packet size, correctly zeroing padding.
Definition: avpacket.c:111
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:35
char * key
Definition: dict.h:86
The optional settings (rendering instructions) that immediately follow the timestamp specifier of a W...
Definition: packet.h:202
static av_always_inline void bytestream_put_buffer(uint8_t **b, const uint8_t *src, unsigned int size)
Definition: bytestream.h:368
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:215
This structure supplies correlation between a packet timestamp and a wall clock production time...
Definition: avcodec.h:498
#define av_free(p)
char * value
Definition: dict.h:87
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:85
int ff_side_data_set_prft(AVPacket *pkt, int64_t timestamp)
Definition: avpacket.c:753
int av_dup_packet(AVPacket *pkt)
Definition: avpacket.c:254
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
Definition: avpacket.c:53
This side data corresponds to the AVCPBProperties struct.
Definition: packet.h:145
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: packet.h:354
const char * av_packet_side_data_name(enum AVPacketSideDataType type)
Definition: avpacket.c:370
#define av_freep(p)
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
Definition: dict.h:70
#define av_malloc_array(a, b)
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Allocate new information of a packet.
Definition: avpacket.c:332
int stream_index
Definition: packet.h:357
The number of side data types.
Definition: packet.h:293
static double val(void *priv, double ch)
Definition: aeval.c:76
This structure stores compressed data.
Definition: packet.h:332
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:348
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
This side data should be associated with an audio stream and corresponds to enum AVAudioServiceType.
Definition: packet.h:120
static uint8_t tmp[11]
Definition: aes_ctr.c:26