FFmpeg  4.0
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 #include "avcodec.h"
30 #include "bytestream.h"
31 #include "internal.h"
32 
34 {
35  pkt->pts = AV_NOPTS_VALUE;
36  pkt->dts = AV_NOPTS_VALUE;
37  pkt->pos = -1;
38  pkt->duration = 0;
39 #if FF_API_CONVERGENCE_DURATION
41  pkt->convergence_duration = 0;
43 #endif
44  pkt->flags = 0;
45  pkt->stream_index = 0;
46  pkt->buf = NULL;
47  pkt->side_data = NULL;
48  pkt->side_data_elems = 0;
49 }
50 
52 {
53  AVPacket *pkt = av_mallocz(sizeof(AVPacket));
54  if (!pkt)
55  return pkt;
56 
57  av_packet_unref(pkt);
58 
59  return pkt;
60 }
61 
63 {
64  if (!pkt || !*pkt)
65  return;
66 
67  av_packet_unref(*pkt);
68  av_freep(pkt);
69 }
70 
71 static int packet_alloc(AVBufferRef **buf, int size)
72 {
73  int ret;
74  if (size < 0 || size >= INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
75  return AVERROR(EINVAL);
76 
78  if (ret < 0)
79  return ret;
80 
81  memset((*buf)->data + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
82 
83  return 0;
84 }
85 
87 {
88  AVBufferRef *buf = NULL;
89  int ret = packet_alloc(&buf, size);
90  if (ret < 0)
91  return ret;
92 
93  av_init_packet(pkt);
94  pkt->buf = buf;
95  pkt->data = buf->data;
96  pkt->size = size;
97 
98  return 0;
99 }
100 
102 {
103  if (pkt->size <= size)
104  return;
105  pkt->size = size;
106  memset(pkt->data + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
107 }
108 
109 int av_grow_packet(AVPacket *pkt, int grow_by)
110 {
111  int new_size;
112  av_assert0((unsigned)pkt->size <= INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE);
113  if ((unsigned)grow_by >
114  INT_MAX - (pkt->size + AV_INPUT_BUFFER_PADDING_SIZE))
115  return -1;
116 
117  new_size = pkt->size + grow_by + AV_INPUT_BUFFER_PADDING_SIZE;
118  if (pkt->buf) {
119  size_t data_offset;
120  uint8_t *old_data = pkt->data;
121  if (pkt->data == NULL) {
122  data_offset = 0;
123  pkt->data = pkt->buf->data;
124  } else {
125  data_offset = pkt->data - pkt->buf->data;
126  if (data_offset > INT_MAX - new_size)
127  return -1;
128  }
129 
130  if (new_size + data_offset > pkt->buf->size) {
131  int ret = av_buffer_realloc(&pkt->buf, new_size + data_offset);
132  if (ret < 0) {
133  pkt->data = old_data;
134  return ret;
135  }
136  pkt->data = pkt->buf->data + data_offset;
137  }
138  } else {
139  pkt->buf = av_buffer_alloc(new_size);
140  if (!pkt->buf)
141  return AVERROR(ENOMEM);
142  if (pkt->size > 0)
143  memcpy(pkt->buf->data, pkt->data, pkt->size);
144  pkt->data = pkt->buf->data;
145  }
146  pkt->size += grow_by;
147  memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
148 
149  return 0;
150 }
151 
153 {
154  if (size >= INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
155  return AVERROR(EINVAL);
156 
159  if (!pkt->buf)
160  return AVERROR(ENOMEM);
161 
162  pkt->data = data;
163  pkt->size = size;
164 
165  return 0;
166 }
167 
168 #if FF_API_AVPACKET_OLD_API
170 #define ALLOC_MALLOC(data, size) data = av_malloc(size)
171 #define ALLOC_BUF(data, size) \
172 do { \
173  av_buffer_realloc(&pkt->buf, size); \
174  data = pkt->buf ? pkt->buf->data : NULL; \
175 } while (0)
176 
177 #define DUP_DATA(dst, src, size, padding, ALLOC) \
178  do { \
179  void *data; \
180  if (padding) { \
181  if ((unsigned)(size) > \
182  (unsigned)(size) + AV_INPUT_BUFFER_PADDING_SIZE) \
183  goto failed_alloc; \
184  ALLOC(data, size + AV_INPUT_BUFFER_PADDING_SIZE); \
185  } else { \
186  ALLOC(data, size); \
187  } \
188  if (!data) \
189  goto failed_alloc; \
190  memcpy(data, src, size); \
191  if (padding) \
192  memset((uint8_t *)data + size, 0, \
193  AV_INPUT_BUFFER_PADDING_SIZE); \
194  dst = data; \
195  } while (0)
196 
197 /* Makes duplicates of data, side_data, but does not copy any other fields */
198 static int copy_packet_data(AVPacket *pkt, const AVPacket *src, int dup)
199 {
200  pkt->data = NULL;
201  pkt->side_data = NULL;
202  pkt->side_data_elems = 0;
203  if (pkt->buf) {
204  AVBufferRef *ref = av_buffer_ref(src->buf);
205  if (!ref)
206  return AVERROR(ENOMEM);
207  pkt->buf = ref;
208  pkt->data = ref->data;
209  } else {
210  DUP_DATA(pkt->data, src->data, pkt->size, 1, ALLOC_BUF);
211  }
212  if (src->side_data_elems && dup) {
213  pkt->side_data = src->side_data;
214  pkt->side_data_elems = src->side_data_elems;
215  }
216  if (src->side_data_elems && !dup) {
217  return av_copy_packet_side_data(pkt, src);
218  }
219  return 0;
220 
221 failed_alloc:
222  av_packet_unref(pkt);
223  return AVERROR(ENOMEM);
224 }
225 
227 {
228  if (src->side_data_elems) {
229  int i;
230  DUP_DATA(pkt->side_data, src->side_data,
231  src->side_data_elems * sizeof(*src->side_data), 0, ALLOC_MALLOC);
232  if (src != pkt) {
233  memset(pkt->side_data, 0,
234  src->side_data_elems * sizeof(*src->side_data));
235  }
236  for (i = 0; i < src->side_data_elems; i++) {
237  DUP_DATA(pkt->side_data[i].data, src->side_data[i].data,
238  src->side_data[i].size, 1, ALLOC_MALLOC);
239  pkt->side_data[i].size = src->side_data[i].size;
240  pkt->side_data[i].type = src->side_data[i].type;
241  }
242  }
243  pkt->side_data_elems = src->side_data_elems;
244  return 0;
245 
246 failed_alloc:
247  av_packet_unref(pkt);
248  return AVERROR(ENOMEM);
249 }
250 
252 {
253  AVPacket tmp_pkt;
254 
255  if (!pkt->buf && pkt->data) {
256  tmp_pkt = *pkt;
257  return copy_packet_data(pkt, &tmp_pkt, 1);
258  }
259  return 0;
260 }
261 
263 {
264  *dst = *src;
265  return copy_packet_data(dst, src, 0);
266 }
268 #endif
269 
271 {
272  int i;
273  for (i = 0; i < pkt->side_data_elems; i++)
274  av_freep(&pkt->side_data[i].data);
275  av_freep(&pkt->side_data);
276  pkt->side_data_elems = 0;
277 }
278 
279 #if FF_API_AVPACKET_OLD_API
282 {
283  if (pkt) {
284  if (pkt->buf)
285  av_buffer_unref(&pkt->buf);
286  pkt->data = NULL;
287  pkt->size = 0;
288 
290  }
291 }
293 #endif
294 
296  uint8_t *data, size_t size)
297 {
299  int i, elems = pkt->side_data_elems;
300 
301  for (i = 0; i < elems; i++) {
302  AVPacketSideData *sd = &pkt->side_data[i];
303 
304  if (sd->type == type) {
305  av_free(sd->data);
306  sd->data = data;
307  sd->size = size;
308  return 0;
309  }
310  }
311 
312  if ((unsigned)elems + 1 > AV_PKT_DATA_NB)
313  return AVERROR(ERANGE);
314 
315  tmp = av_realloc(pkt->side_data, (elems + 1) * sizeof(*tmp));
316  if (!tmp)
317  return AVERROR(ENOMEM);
318 
319  pkt->side_data = tmp;
320  pkt->side_data[elems].data = data;
321  pkt->side_data[elems].size = size;
322  pkt->side_data[elems].type = type;
323  pkt->side_data_elems++;
324 
325  return 0;
326 }
327 
328 
330  int size)
331 {
332  int ret;
333  uint8_t *data;
334 
335  if ((unsigned)size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
336  return NULL;
338  if (!data)
339  return NULL;
340 
341  ret = av_packet_add_side_data(pkt, type, data, size);
342  if (ret < 0) {
343  av_freep(&data);
344  return NULL;
345  }
346 
347  return data;
348 }
349 
351  int *size)
352 {
353  int i;
354 
355  for (i = 0; i < pkt->side_data_elems; i++) {
356  if (pkt->side_data[i].type == type) {
357  if (size)
358  *size = pkt->side_data[i].size;
359  return pkt->side_data[i].data;
360  }
361  }
362  if (size)
363  *size = 0;
364  return NULL;
365 }
366 
368 {
369  switch(type) {
370  case AV_PKT_DATA_PALETTE: return "Palette";
371  case AV_PKT_DATA_NEW_EXTRADATA: return "New Extradata";
372  case AV_PKT_DATA_PARAM_CHANGE: return "Param Change";
373  case AV_PKT_DATA_H263_MB_INFO: return "H263 MB Info";
374  case AV_PKT_DATA_REPLAYGAIN: return "Replay Gain";
375  case AV_PKT_DATA_DISPLAYMATRIX: return "Display Matrix";
376  case AV_PKT_DATA_STEREO3D: return "Stereo 3D";
377  case AV_PKT_DATA_AUDIO_SERVICE_TYPE: return "Audio Service Type";
378  case AV_PKT_DATA_SKIP_SAMPLES: return "Skip Samples";
379  case AV_PKT_DATA_JP_DUALMONO: return "JP Dual Mono";
380  case AV_PKT_DATA_STRINGS_METADATA: return "Strings Metadata";
381  case AV_PKT_DATA_SUBTITLE_POSITION: return "Subtitle Position";
382  case AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL: return "Matroska BlockAdditional";
383  case AV_PKT_DATA_WEBVTT_IDENTIFIER: return "WebVTT ID";
384  case AV_PKT_DATA_WEBVTT_SETTINGS: return "WebVTT Settings";
385  case AV_PKT_DATA_METADATA_UPDATE: return "Metadata Update";
386  case AV_PKT_DATA_MPEGTS_STREAM_ID: return "MPEGTS Stream ID";
387  case AV_PKT_DATA_MASTERING_DISPLAY_METADATA: return "Mastering display metadata";
388  case AV_PKT_DATA_CONTENT_LIGHT_LEVEL: return "Content light level metadata";
389  case AV_PKT_DATA_SPHERICAL: return "Spherical Mapping";
390  case AV_PKT_DATA_A53_CC: return "A53 Closed Captions";
391  }
392  return NULL;
393 }
394 
395 #if FF_API_MERGE_SD_API
396 
397 #define FF_MERGE_MARKER 0x8c4d9d108e25e9feULL
398 
400  if(pkt->side_data_elems){
401  AVBufferRef *buf;
402  int i;
403  uint8_t *p;
404  uint64_t size= pkt->size + 8LL + AV_INPUT_BUFFER_PADDING_SIZE;
405  AVPacket old= *pkt;
406  for (i=0; i<old.side_data_elems; i++) {
407  size += old.side_data[i].size + 5LL;
408  }
409  if (size > INT_MAX)
410  return AVERROR(EINVAL);
411  buf = av_buffer_alloc(size);
412  if (!buf)
413  return AVERROR(ENOMEM);
414  pkt->buf = buf;
415  pkt->data = p = buf->data;
416  pkt->size = size - AV_INPUT_BUFFER_PADDING_SIZE;
417  bytestream_put_buffer(&p, old.data, old.size);
418  for (i=old.side_data_elems-1; i>=0; i--) {
419  bytestream_put_buffer(&p, old.side_data[i].data, old.side_data[i].size);
420  bytestream_put_be32(&p, old.side_data[i].size);
421  *p++ = old.side_data[i].type | ((i==old.side_data_elems-1)*128);
422  }
423  bytestream_put_be64(&p, FF_MERGE_MARKER);
424  av_assert0(p-pkt->data == pkt->size);
425  memset(p, 0, AV_INPUT_BUFFER_PADDING_SIZE);
426  av_packet_unref(&old);
427  pkt->side_data_elems = 0;
428  pkt->side_data = NULL;
429  return 1;
430  }
431  return 0;
432 }
433 
435  if (!pkt->side_data_elems && pkt->size >12 && AV_RB64(pkt->data + pkt->size - 8) == FF_MERGE_MARKER){
436  int i;
437  unsigned int size;
438  uint8_t *p;
439 
440  p = pkt->data + pkt->size - 8 - 5;
441  for (i=1; ; i++){
442  size = AV_RB32(p);
443  if (size>INT_MAX - 5 || p - pkt->data < size)
444  return 0;
445  if (p[4]&128)
446  break;
447  if (p - pkt->data < size + 5)
448  return 0;
449  p-= size+5;
450  }
451 
452  if (i > AV_PKT_DATA_NB)
453  return AVERROR(ERANGE);
454 
455  pkt->side_data = av_malloc_array(i, sizeof(*pkt->side_data));
456  if (!pkt->side_data)
457  return AVERROR(ENOMEM);
458 
459  p= pkt->data + pkt->size - 8 - 5;
460  for (i=0; ; i++){
461  size= AV_RB32(p);
462  av_assert0(size<=INT_MAX - 5 && p - pkt->data >= size);
464  pkt->side_data[i].size = size;
465  pkt->side_data[i].type = p[4]&127;
466  if (!pkt->side_data[i].data)
467  return AVERROR(ENOMEM);
468  memcpy(pkt->side_data[i].data, p-size, size);
469  pkt->size -= size + 5;
470  if(p[4]&128)
471  break;
472  p-= size+5;
473  }
474  pkt->size -= 8;
475  pkt->side_data_elems = i+1;
476  return 1;
477  }
478  return 0;
479 }
480 #endif
481 
483 {
484  AVDictionaryEntry *t = NULL;
485  uint8_t *data = NULL;
486  *size = 0;
487 
488  if (!dict)
489  return NULL;
490 
491  while ((t = av_dict_get(dict, "", t, AV_DICT_IGNORE_SUFFIX))) {
492  const size_t keylen = strlen(t->key);
493  const size_t valuelen = strlen(t->value);
494  const size_t new_size = *size + keylen + 1 + valuelen + 1;
495  uint8_t *const new_data = av_realloc(data, new_size);
496 
497  if (!new_data)
498  goto fail;
499  data = new_data;
500  if (new_size > INT_MAX)
501  goto fail;
502 
503  memcpy(data + *size, t->key, keylen + 1);
504  memcpy(data + *size + keylen + 1, t->value, valuelen + 1);
505 
506  *size = new_size;
507  }
508 
509  return data;
510 
511 fail:
512  av_freep(&data);
513  *size = 0;
514  return NULL;
515 }
516 
518 {
519  const uint8_t *end = data + size;
520  int ret = 0;
521 
522  if (!dict || !data || !size)
523  return ret;
524  if (size && end[-1])
525  return AVERROR_INVALIDDATA;
526  while (data < end) {
527  const uint8_t *key = data;
528  const uint8_t *val = data + strlen(key) + 1;
529 
530  if (val >= end || !*key)
531  return AVERROR_INVALIDDATA;
532 
533  ret = av_dict_set(dict, key, val, 0);
534  if (ret < 0)
535  break;
536  data = val + strlen(val) + 1;
537  }
538 
539  return ret;
540 }
541 
543  int size)
544 {
545  int i;
546 
547  for (i = 0; i < pkt->side_data_elems; i++) {
548  if (pkt->side_data[i].type == type) {
549  if (size > pkt->side_data[i].size)
550  return AVERROR(ENOMEM);
551  pkt->side_data[i].size = size;
552  return 0;
553  }
554  }
555  return AVERROR(ENOENT);
556 }
557 
559 {
560  int i;
561 
562  dst->pts = src->pts;
563  dst->dts = src->dts;
564  dst->pos = src->pos;
565  dst->duration = src->duration;
566 #if FF_API_CONVERGENCE_DURATION
570 #endif
571  dst->flags = src->flags;
572  dst->stream_index = src->stream_index;
573 
574  dst->side_data = NULL;
575  dst->side_data_elems = 0;
576  for (i = 0; i < src->side_data_elems; i++) {
577  enum AVPacketSideDataType type = src->side_data[i].type;
578  int size = src->side_data[i].size;
579  uint8_t *src_data = src->side_data[i].data;
580  uint8_t *dst_data = av_packet_new_side_data(dst, type, size);
581 
582  if (!dst_data) {
584  return AVERROR(ENOMEM);
585  }
586  memcpy(dst_data, src_data, size);
587  }
588 
589  return 0;
590 }
591 
593 {
595  av_buffer_unref(&pkt->buf);
596  av_init_packet(pkt);
597  pkt->data = NULL;
598  pkt->size = 0;
599 }
600 
602 {
603  int ret;
604 
605  ret = av_packet_copy_props(dst, src);
606  if (ret < 0)
607  return ret;
608 
609  if (!src->buf) {
610  ret = packet_alloc(&dst->buf, src->size);
611  if (ret < 0)
612  goto fail;
613  if (src->size)
614  memcpy(dst->buf->data, src->data, src->size);
615 
616  dst->data = dst->buf->data;
617  } else {
618  dst->buf = av_buffer_ref(src->buf);
619  if (!dst->buf) {
620  ret = AVERROR(ENOMEM);
621  goto fail;
622  }
623  dst->data = src->data;
624  }
625 
626  dst->size = src->size;
627 
628  return 0;
629 fail:
631  return ret;
632 }
633 
635 {
636  AVPacket *ret = av_packet_alloc();
637 
638  if (!ret)
639  return ret;
640 
641  if (av_packet_ref(ret, src))
642  av_packet_free(&ret);
643 
644  return ret;
645 }
646 
648 {
649  *dst = *src;
650  av_init_packet(src);
651  src->data = NULL;
652  src->size = 0;
653 }
654 
656 {
657  int ret;
658 
659  if (pkt->buf)
660  return 0;
661 
662  ret = packet_alloc(&pkt->buf, pkt->size);
663  if (ret < 0)
664  return ret;
665  if (pkt->size)
666  memcpy(pkt->buf->data, pkt->data, pkt->size);
667 
668  pkt->data = pkt->buf->data;
669 
670  return 0;
671 }
672 
674 {
675  AVBufferRef *buf = NULL;
676  int ret;
677 
678  if (pkt->buf && av_buffer_is_writable(pkt->buf))
679  return 0;
680 
681  ret = packet_alloc(&buf, pkt->size);
682  if (ret < 0)
683  return ret;
684  if (pkt->size)
685  memcpy(buf->data, pkt->data, pkt->size);
686 
687  av_buffer_unref(&pkt->buf);
688  pkt->buf = buf;
689  pkt->data = buf->data;
690 
691  return 0;
692 }
693 
695 {
696  if (pkt->pts != AV_NOPTS_VALUE)
697  pkt->pts = av_rescale_q(pkt->pts, src_tb, dst_tb);
698  if (pkt->dts != AV_NOPTS_VALUE)
699  pkt->dts = av_rescale_q(pkt->dts, src_tb, dst_tb);
700  if (pkt->duration > 0)
701  pkt->duration = av_rescale_q(pkt->duration, src_tb, dst_tb);
702 #if FF_API_CONVERGENCE_DURATION
704  if (pkt->convergence_duration > 0)
705  pkt->convergence_duration = av_rescale_q(pkt->convergence_duration, src_tb, dst_tb);
707 #endif
708 }
709 
710 int ff_side_data_set_encoder_stats(AVPacket *pkt, int quality, int64_t *error, int error_count, int pict_type)
711 {
712  uint8_t *side_data;
713  int side_data_size;
714  int i;
715 
716  side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_QUALITY_STATS, &side_data_size);
717  if (!side_data) {
718  side_data_size = 4+4+8*error_count;
720  side_data_size);
721  }
722 
723  if (!side_data || side_data_size < 4+4+8*error_count)
724  return AVERROR(ENOMEM);
725 
726  AV_WL32(side_data , quality );
727  side_data[4] = pict_type;
728  side_data[5] = error_count;
729  for (i = 0; i<error_count; i++)
730  AV_WL64(side_data+8 + 8*i , error[i]);
731 
732  return 0;
733 }
int av_packet_split_side_data(AVPacket *pkt)
Definition: avpacket.c:434
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:771
#define DUP_DATA(dst, src, size, padding, ALLOC)
Definition: avpacket.c:177
#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: avcodec.h:1143
A list of zero terminated key/value strings.
Definition: avcodec.h:1312
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: avcodec.h:1299
int ff_side_data_set_encoder_stats(AVPacket *pkt, int quality, int64_t *error, int error_count, int pict_type)
Definition: avpacket.c:710
Memory handling functions.
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1450
#define AV_RB64
Definition: intreadwrite.h:164
void av_shrink_packet(AVPacket *pkt, int size)
Reduce packet size, correctly zeroing padding.
Definition: avpacket.c:101
Subtitle event position.
Definition: avcodec.h:1286
#define ALLOC_MALLOC(data, size)
Definition: avpacket.c:170
This side data should be associated with a video stream and contains Stereoscopic 3D information in f...
Definition: avcodec.h:1217
ATSC A53 Part 4 Closed Captions.
Definition: avcodec.h:1345
int size
Definition: avcodec.h:1431
#define ALLOC_BUF(data, size)
Definition: avpacket.c:171
const char * key
static AVPacket pkt
#define src
Definition: vp8dsp.c:254
An AV_PKT_DATA_H263_MB_INFO side data packet contains a number of structures with info about macroblo...
Definition: avcodec.h:1196
Mastering display metadata (based on SMPTE-2086:2014).
Definition: avcodec.h:1325
#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:62
uint8_t
int av_packet_unpack_dictionary(const uint8_t *data, int size, AVDictionary **dict)
Unpack a dictionary from side_data.
Definition: avpacket.c:517
int av_packet_merge_side_data(AVPacket *pkt)
Definition: avpacket.c:399
#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: avcodec.h:1448
This side data contains a 3x3 transformation matrix describing an affine transformation that needs to...
Definition: avcodec.h:1211
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:152
const char data[16]
Definition: mxf.c:90
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: avcodec.h:1430
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
Definition: avpacket.c:647
uint8_t * data
Definition: avcodec.h:1374
int av_packet_ref(AVPacket *dst, const AVPacket *src)
Setup a new reference to the data described by a given packet.
Definition: avpacket.c:601
int av_copy_packet_side_data(AVPacket *pkt, const AVPacket *src)
Copy packet side data.
Definition: avpacket.c:226
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:673
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, this is required to pass the stream ID information from the demuxer to the correspo...
Definition: avcodec.h:1318
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
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:86
#define AV_WL64(p, v)
Definition: intreadwrite.h:440
An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE bytes worth of palette...
Definition: avcodec.h:1149
AVPacket * av_packet_clone(const AVPacket *src)
Create a new packet that references the same data as src.
Definition: avpacket.c:634
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:694
An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows:
Definition: avcodec.h:1175
#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:350
FF_ENABLE_DEPRECATION_WARNINGS void av_packet_free_side_data(AVPacket *pkt)
Convenience function to free all the side data stored.
Definition: avpacket.c:270
int av_dup_packet(AVPacket *pkt)
Definition: avpacket.c:251
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:1413
simple assert() macros that are a bit more flexible than ISO C assert().
enum AVPacketSideDataType type
Definition: avcodec.h:1376
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
int side_data_elems
Definition: avcodec.h:1442
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:28
int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Shrink the already allocated side data buffer.
Definition: avpacket.c:542
int av_buffer_realloc(AVBufferRef **pbuf, int size)
Reallocate a given buffer.
Definition: buffer.c:169
#define fail()
Definition: checkasm.h:116
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1436
int av_copy_packet(AVPacket *dst, const AVPacket *src)
Copy packet, including contents.
Definition: avpacket.c:262
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:558
This side data contains quality related information from the encoder.
Definition: avcodec.h:1235
static int packet_alloc(AVBufferRef **buf, int size)
Definition: avpacket.c:71
int av_packet_make_refcounted(AVPacket *pkt)
Ensure the data described by a given packet is reference counted.
Definition: avpacket.c:655
This side data should be associated with a video stream and corresponds to the AVSphericalMapping str...
Definition: avcodec.h:1331
int av_buffer_is_writable(const AVBufferRef *buf)
Definition: buffer.c:133
static void error(const char *err)
Content light level (based on CTA-861.3).
Definition: avcodec.h:1338
The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format that the extradata buffer was...
Definition: avcodec.h:1158
Libavcodec external API header.
A list of zero terminated key/value strings.
Definition: avcodec.h:1275
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:482
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:592
uint8_t * data
The data buffer.
Definition: buffer.h:89
void * buf
Definition: avisynth_c.h:690
Data found in BlockAdditional element of matroska container.
Definition: avcodec.h:1294
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: avcodec.h:1259
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:295
cl_device_type type
static int copy_packet_data(AVPacket *pkt, const AVPacket *src, int dup)
Definition: avpacket.c:198
int size
Size of data in bytes.
Definition: buffer.h:93
This side data should be associated with an audio stream and contains ReplayGain information in form ...
Definition: avcodec.h:1202
#define FF_MERGE_MARKER
Definition: avpacket.c:397
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: avcodec.h:1269
AVPacketSideData * side_data
Additional packet data that can be provided by the container.
Definition: avcodec.h:1441
attribute_deprecated int64_t convergence_duration
Definition: avcodec.h:1459
#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:109
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:33
char * key
Definition: dict.h:86
The optional settings (rendering instructions) that immediately follow the timestamp specifier of a W...
Definition: avcodec.h:1305
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:773
#define av_free(p)
char * value
Definition: dict.h:87
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:85
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
Definition: avpacket.c:51
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1429
const char * av_packet_side_data_name(enum AVPacketSideDataType type)
Definition: avpacket.c:367
FF_DISABLE_DEPRECATION_WARNINGS void av_free_packet(AVPacket *pkt)
Free a packet.
Definition: avpacket.c:281
#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:329
int stream_index
Definition: avcodec.h:1432
The number of side data types.
Definition: avcodec.h:1368
This structure stores compressed data.
Definition: avcodec.h:1407
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1423
#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: avcodec.h:1223
static uint8_t tmp[11]
Definition: aes_ctr.c:26