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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;
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_QUALITY_STATS: return "Quality stats";
379  case AV_PKT_DATA_FALLBACK_TRACK: return "Fallback track";
380  case AV_PKT_DATA_CPB_PROPERTIES: return "CPB properties";
381  case AV_PKT_DATA_SKIP_SAMPLES: return "Skip Samples";
382  case AV_PKT_DATA_JP_DUALMONO: return "JP Dual Mono";
383  case AV_PKT_DATA_STRINGS_METADATA: return "Strings Metadata";
384  case AV_PKT_DATA_SUBTITLE_POSITION: return "Subtitle Position";
385  case AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL: return "Matroska BlockAdditional";
386  case AV_PKT_DATA_WEBVTT_IDENTIFIER: return "WebVTT ID";
387  case AV_PKT_DATA_WEBVTT_SETTINGS: return "WebVTT Settings";
388  case AV_PKT_DATA_METADATA_UPDATE: return "Metadata Update";
389  case AV_PKT_DATA_MPEGTS_STREAM_ID: return "MPEGTS Stream ID";
390  case AV_PKT_DATA_MASTERING_DISPLAY_METADATA: return "Mastering display metadata";
391  case AV_PKT_DATA_CONTENT_LIGHT_LEVEL: return "Content light level metadata";
392  case AV_PKT_DATA_SPHERICAL: return "Spherical Mapping";
393  case AV_PKT_DATA_A53_CC: return "A53 Closed Captions";
394  case AV_PKT_DATA_ENCRYPTION_INIT_INFO: return "Encryption initialization data";
395  case AV_PKT_DATA_ENCRYPTION_INFO: return "Encryption info";
396  case AV_PKT_DATA_AFD: return "Active Format Description data";
397  }
398  return NULL;
399 }
400 
401 #if FF_API_MERGE_SD_API
402 
403 #define FF_MERGE_MARKER 0x8c4d9d108e25e9feULL
404 
406  if(pkt->side_data_elems){
407  AVBufferRef *buf;
408  int i;
409  uint8_t *p;
410  uint64_t size= pkt->size + 8LL + AV_INPUT_BUFFER_PADDING_SIZE;
411  AVPacket old= *pkt;
412  for (i=0; i<old.side_data_elems; i++) {
413  size += old.side_data[i].size + 5LL;
414  }
415  if (size > INT_MAX)
416  return AVERROR(EINVAL);
417  buf = av_buffer_alloc(size);
418  if (!buf)
419  return AVERROR(ENOMEM);
420  pkt->buf = buf;
421  pkt->data = p = buf->data;
422  pkt->size = size - AV_INPUT_BUFFER_PADDING_SIZE;
423  bytestream_put_buffer(&p, old.data, old.size);
424  for (i=old.side_data_elems-1; i>=0; i--) {
425  bytestream_put_buffer(&p, old.side_data[i].data, old.side_data[i].size);
426  bytestream_put_be32(&p, old.side_data[i].size);
427  *p++ = old.side_data[i].type | ((i==old.side_data_elems-1)*128);
428  }
429  bytestream_put_be64(&p, FF_MERGE_MARKER);
430  av_assert0(p-pkt->data == pkt->size);
431  memset(p, 0, AV_INPUT_BUFFER_PADDING_SIZE);
432  av_packet_unref(&old);
433  pkt->side_data_elems = 0;
434  pkt->side_data = NULL;
435  return 1;
436  }
437  return 0;
438 }
439 
441  if (!pkt->side_data_elems && pkt->size >12 && AV_RB64(pkt->data + pkt->size - 8) == FF_MERGE_MARKER){
442  int i;
443  unsigned int size;
444  uint8_t *p;
445 
446  p = pkt->data + pkt->size - 8 - 5;
447  for (i=1; ; i++){
448  size = AV_RB32(p);
449  if (size>INT_MAX - 5 || p - pkt->data < size)
450  return 0;
451  if (p[4]&128)
452  break;
453  if (p - pkt->data < size + 5)
454  return 0;
455  p-= size+5;
456  }
457 
458  if (i > AV_PKT_DATA_NB)
459  return AVERROR(ERANGE);
460 
461  pkt->side_data = av_malloc_array(i, sizeof(*pkt->side_data));
462  if (!pkt->side_data)
463  return AVERROR(ENOMEM);
464 
465  p= pkt->data + pkt->size - 8 - 5;
466  for (i=0; ; i++){
467  size= AV_RB32(p);
470  pkt->side_data[i].size = size;
471  pkt->side_data[i].type = p[4]&127;
472  if (!pkt->side_data[i].data)
473  return AVERROR(ENOMEM);
474  memcpy(pkt->side_data[i].data, p-size, size);
475  pkt->size -= size + 5;
476  if(p[4]&128)
477  break;
478  p-= size+5;
479  }
480  pkt->size -= 8;
481  pkt->side_data_elems = i+1;
482  return 1;
483  }
484  return 0;
485 }
486 #endif
487 
489 {
490  AVDictionaryEntry *t = NULL;
491  uint8_t *data = NULL;
492  *size = 0;
493 
494  if (!dict)
495  return NULL;
496 
497  while ((t = av_dict_get(dict, "", t, AV_DICT_IGNORE_SUFFIX))) {
498  const size_t keylen = strlen(t->key);
499  const size_t valuelen = strlen(t->value);
500  const size_t new_size = *size + keylen + 1 + valuelen + 1;
501  uint8_t *const new_data = av_realloc(data, new_size);
502 
503  if (!new_data)
504  goto fail;
505  data = new_data;
506  if (new_size > INT_MAX)
507  goto fail;
508 
509  memcpy(data + *size, t->key, keylen + 1);
510  memcpy(data + *size + keylen + 1, t->value, valuelen + 1);
511 
512  *size = new_size;
513  }
514 
515  return data;
516 
517 fail:
518  av_freep(&data);
519  *size = 0;
520  return NULL;
521 }
522 
524 {
525  const uint8_t *end = data + size;
526  int ret = 0;
527 
528  if (!dict || !data || !size)
529  return ret;
530  if (size && end[-1])
531  return AVERROR_INVALIDDATA;
532  while (data < end) {
533  const uint8_t *key = data;
534  const uint8_t *val = data + strlen(key) + 1;
535 
536  if (val >= end || !*key)
537  return AVERROR_INVALIDDATA;
538 
539  ret = av_dict_set(dict, key, val, 0);
540  if (ret < 0)
541  break;
542  data = val + strlen(val) + 1;
543  }
544 
545  return ret;
546 }
547 
549  int size)
550 {
551  int i;
552 
553  for (i = 0; i < pkt->side_data_elems; i++) {
554  if (pkt->side_data[i].type == type) {
555  if (size > pkt->side_data[i].size)
556  return AVERROR(ENOMEM);
557  pkt->side_data[i].size = size;
558  return 0;
559  }
560  }
561  return AVERROR(ENOENT);
562 }
563 
565 {
566  int i;
567 
568  dst->pts = src->pts;
569  dst->dts = src->dts;
570  dst->pos = src->pos;
571  dst->duration = src->duration;
572 #if FF_API_CONVERGENCE_DURATION
576 #endif
577  dst->flags = src->flags;
578  dst->stream_index = src->stream_index;
579 
580  dst->side_data = NULL;
581  dst->side_data_elems = 0;
582  for (i = 0; i < src->side_data_elems; i++) {
583  enum AVPacketSideDataType type = src->side_data[i].type;
584  int size = src->side_data[i].size;
585  uint8_t *src_data = src->side_data[i].data;
586  uint8_t *dst_data = av_packet_new_side_data(dst, type, size);
587 
588  if (!dst_data) {
590  return AVERROR(ENOMEM);
591  }
592  memcpy(dst_data, src_data, size);
593  }
594 
595  return 0;
596 }
597 
599 {
601  av_buffer_unref(&pkt->buf);
602  av_init_packet(pkt);
603  pkt->data = NULL;
604  pkt->size = 0;
605 }
606 
608 {
609  int ret;
610 
611  ret = av_packet_copy_props(dst, src);
612  if (ret < 0)
613  return ret;
614 
615  if (!src->buf) {
616  ret = packet_alloc(&dst->buf, src->size);
617  if (ret < 0)
618  goto fail;
619  if (src->size)
620  memcpy(dst->buf->data, src->data, src->size);
621 
622  dst->data = dst->buf->data;
623  } else {
624  dst->buf = av_buffer_ref(src->buf);
625  if (!dst->buf) {
626  ret = AVERROR(ENOMEM);
627  goto fail;
628  }
629  dst->data = src->data;
630  }
631 
632  dst->size = src->size;
633 
634  return 0;
635 fail:
637  return ret;
638 }
639 
641 {
642  AVPacket *ret = av_packet_alloc();
643 
644  if (!ret)
645  return ret;
646 
647  if (av_packet_ref(ret, src))
648  av_packet_free(&ret);
649 
650  return ret;
651 }
652 
654 {
655  *dst = *src;
656  av_init_packet(src);
657  src->data = NULL;
658  src->size = 0;
659 }
660 
662 {
663  int ret;
664 
665  if (pkt->buf)
666  return 0;
667 
668  ret = packet_alloc(&pkt->buf, pkt->size);
669  if (ret < 0)
670  return ret;
671  if (pkt->size)
672  memcpy(pkt->buf->data, pkt->data, pkt->size);
673 
674  pkt->data = pkt->buf->data;
675 
676  return 0;
677 }
678 
680 {
681  AVBufferRef *buf = NULL;
682  int ret;
683 
684  if (pkt->buf && av_buffer_is_writable(pkt->buf))
685  return 0;
686 
687  ret = packet_alloc(&buf, pkt->size);
688  if (ret < 0)
689  return ret;
690  if (pkt->size)
691  memcpy(buf->data, pkt->data, pkt->size);
692 
693  av_buffer_unref(&pkt->buf);
694  pkt->buf = buf;
695  pkt->data = buf->data;
696 
697  return 0;
698 }
699 
701 {
702  if (pkt->pts != AV_NOPTS_VALUE)
703  pkt->pts = av_rescale_q(pkt->pts, src_tb, dst_tb);
704  if (pkt->dts != AV_NOPTS_VALUE)
705  pkt->dts = av_rescale_q(pkt->dts, src_tb, dst_tb);
706  if (pkt->duration > 0)
707  pkt->duration = av_rescale_q(pkt->duration, src_tb, dst_tb);
708 #if FF_API_CONVERGENCE_DURATION
710  if (pkt->convergence_duration > 0)
711  pkt->convergence_duration = av_rescale_q(pkt->convergence_duration, src_tb, dst_tb);
713 #endif
714 }
715 
716 int ff_side_data_set_encoder_stats(AVPacket *pkt, int quality, int64_t *error, int error_count, int pict_type)
717 {
718  uint8_t *side_data;
719  int side_data_size;
720  int i;
721 
722  side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_QUALITY_STATS, &side_data_size);
723  if (!side_data) {
724  side_data_size = 4+4+8*error_count;
726  side_data_size);
727  }
728 
729  if (!side_data || side_data_size < 4+4+8*error_count)
730  return AVERROR(ENOMEM);
731 
732  AV_WL32(side_data , quality );
733  side_data[4] = pict_type;
734  side_data[5] = error_count;
735  for (i = 0; i<error_count; i++)
736  AV_WL64(side_data+8 + 8*i , error[i]);
737 
738  return 0;
739 }
int av_packet_split_side_data(AVPacket *pkt)
Definition: avpacket.c:440
#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
AVPacketSideDataType
Definition: avcodec.h:1159
A list of zero terminated key/value strings.
Definition: avcodec.h:1328
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
The optional first identifier line of a WebVTT cue.
Definition: avcodec.h:1315
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:135
int ff_side_data_set_encoder_stats(AVPacket *pkt, int quality, int64_t *error, int error_count, int pict_type)
Definition: avpacket.c:716
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
Memory handling functions.
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1472
void av_shrink_packet(AVPacket *pkt, int size)
Reduce packet size, correctly zeroing padding.
Definition: avpacket.c:101
Subtitle event position.
Definition: avcodec.h:1302
#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:1233
ATSC A53 Part 4 Closed Captions.
Definition: avcodec.h:1361
int size
Definition: avcodec.h:1453
This side data contains an integer value representing the stream index of a "fallback" track...
Definition: avcodec.h:1259
#define ALLOC_BUF(data, size)
Definition: avpacket.c:171
const char * key
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
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:1212
Mastering display metadata (based on SMPTE-2086:2014).
Definition: avcodec.h:1341
#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:523
int av_packet_merge_side_data(AVPacket *pkt)
Definition: avpacket.c:405
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:1470
This side data contains a 3x3 transformation matrix describing an affine transformation that needs to...
Definition: avcodec.h:1227
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
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
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:1452
This side data is encryption initialization data.
Definition: avcodec.h:1368
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
Definition: avpacket.c:653
uint8_t * data
Definition: avcodec.h:1396
ptrdiff_t size
Definition: opengl_enc.c:101
int av_packet_ref(AVPacket *dst, const AVPacket *src)
Setup a new reference to the data described by a given packet.
Definition: avpacket.c:607
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:679
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:1334
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:1165
AVPacket * av_packet_clone(const AVPacket *src)
Create a new packet that references the same data as src.
Definition: avpacket.c:640
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:700
An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows:
Definition: avcodec.h:1191
#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:1435
simple assert() macros that are a bit more flexible than ISO C assert().
enum AVPacketSideDataType type
Definition: avcodec.h:1398
int side_data_elems
Definition: avcodec.h:1464
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:548
int av_buffer_realloc(AVBufferRef **pbuf, int size)
Reallocate a given buffer.
Definition: buffer.c:169
#define fail()
Definition: checkasm.h:117
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1458
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:564
This side data contains quality related information from the encoder.
Definition: avcodec.h:1251
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:661
This side data should be associated with a video stream and corresponds to the AVSphericalMapping str...
Definition: avcodec.h:1347
Active Format Description data consisting of a single byte as specified in ETSI TS 101 154 using AVAc...
Definition: avcodec.h:1380
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:1354
The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format that the extradata buffer was...
Definition: avcodec.h:1174
Libavcodec external API header.
A list of zero terminated key/value strings.
Definition: avcodec.h:1291
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:488
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:598
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:1310
GLint GLenum type
Definition: opengl_enc.c:105
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:1275
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
This side data contains encryption info for how to decrypt the packet.
Definition: avcodec.h:1374
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:1218
#define FF_MERGE_MARKER
Definition: avpacket.c:403
A reference to a data buffer.
Definition: buffer.h:81
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_RB64
Definition: bytestream.h:87
An AV_PKT_DATA_JP_DUALMONO side data packet indicates that the packet may contain "dual mono" audio s...
Definition: avcodec.h:1285
AVPacketSideData * side_data
Additional packet data that can be provided by the container.
Definition: avcodec.h:1463
attribute_deprecated int64_t convergence_duration
Definition: avcodec.h:1481
#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:1321
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:782
#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
This side data corresponds to the AVCPBProperties struct.
Definition: avcodec.h:1264
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1451
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:1454
The number of side data types.
Definition: avcodec.h:1390
This structure stores compressed data.
Definition: avcodec.h:1429
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1445
#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:1239
static uint8_t tmp[11]
Definition: aes_ctr.c:26