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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 }
251 #endif
252 
254 {
255  AVPacket tmp_pkt;
256 
257  if (!pkt->buf && pkt->data) {
258  tmp_pkt = *pkt;
259  return copy_packet_data(pkt, &tmp_pkt, 1);
260  }
261  return 0;
262 }
263 
265 {
266  *dst = *src;
267  return copy_packet_data(dst, src, 0);
268 }
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 elems = pkt->side_data_elems;
300 
301  if ((unsigned)elems + 1 > INT_MAX / sizeof(*pkt->side_data))
302  return AVERROR(ERANGE);
303 
304  tmp = av_realloc(pkt->side_data, (elems + 1) * sizeof(*tmp));
305  if (!tmp)
306  return AVERROR(ENOMEM);
307 
308  pkt->side_data = tmp;
309  pkt->side_data[elems].data = data;
310  pkt->side_data[elems].size = size;
311  pkt->side_data[elems].type = type;
312  pkt->side_data_elems++;
313 
314  return 0;
315 }
316 
317 
319  int size)
320 {
321  int ret;
322  uint8_t *data;
323 
324  if ((unsigned)size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
325  return NULL;
327  if (!data)
328  return NULL;
329 
330  ret = av_packet_add_side_data(pkt, type, data, size);
331  if (ret < 0) {
332  av_freep(&data);
333  return NULL;
334  }
335 
336  return data;
337 }
338 
340  int *size)
341 {
342  int i;
343 
344  for (i = 0; i < pkt->side_data_elems; i++) {
345  if (pkt->side_data[i].type == type) {
346  if (size)
347  *size = pkt->side_data[i].size;
348  return pkt->side_data[i].data;
349  }
350  }
351  if (size)
352  *size = 0;
353  return NULL;
354 }
355 
357 {
358  switch(type) {
359  case AV_PKT_DATA_PALETTE: return "Palette";
360  case AV_PKT_DATA_NEW_EXTRADATA: return "New Extradata";
361  case AV_PKT_DATA_PARAM_CHANGE: return "Param Change";
362  case AV_PKT_DATA_H263_MB_INFO: return "H263 MB Info";
363  case AV_PKT_DATA_REPLAYGAIN: return "Replay Gain";
364  case AV_PKT_DATA_DISPLAYMATRIX: return "Display Matrix";
365  case AV_PKT_DATA_STEREO3D: return "Stereo 3D";
366  case AV_PKT_DATA_AUDIO_SERVICE_TYPE: return "Audio Service Type";
367  case AV_PKT_DATA_SKIP_SAMPLES: return "Skip Samples";
368  case AV_PKT_DATA_JP_DUALMONO: return "JP Dual Mono";
369  case AV_PKT_DATA_STRINGS_METADATA: return "Strings Metadata";
370  case AV_PKT_DATA_SUBTITLE_POSITION: return "Subtitle Position";
371  case AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL: return "Matroska BlockAdditional";
372  case AV_PKT_DATA_WEBVTT_IDENTIFIER: return "WebVTT ID";
373  case AV_PKT_DATA_WEBVTT_SETTINGS: return "WebVTT Settings";
374  case AV_PKT_DATA_METADATA_UPDATE: return "Metadata Update";
375  case AV_PKT_DATA_MPEGTS_STREAM_ID: return "MPEGTS Stream ID";
376  case AV_PKT_DATA_MASTERING_DISPLAY_METADATA: return "Mastering display metadata";
377  case AV_PKT_DATA_SPHERICAL: return "Spherical Mapping";
378  }
379  return NULL;
380 }
381 
382 #if FF_API_MERGE_SD_API
383 
384 #define FF_MERGE_MARKER 0x8c4d9d108e25e9feULL
385 
387  if(pkt->side_data_elems){
388  AVBufferRef *buf;
389  int i;
390  uint8_t *p;
391  uint64_t size= pkt->size + 8LL + AV_INPUT_BUFFER_PADDING_SIZE;
392  AVPacket old= *pkt;
393  for (i=0; i<old.side_data_elems; i++) {
394  size += old.side_data[i].size + 5LL;
395  }
396  if (size > INT_MAX)
397  return AVERROR(EINVAL);
398  buf = av_buffer_alloc(size);
399  if (!buf)
400  return AVERROR(ENOMEM);
401  pkt->buf = buf;
402  pkt->data = p = buf->data;
403  pkt->size = size - AV_INPUT_BUFFER_PADDING_SIZE;
404  bytestream_put_buffer(&p, old.data, old.size);
405  for (i=old.side_data_elems-1; i>=0; i--) {
406  bytestream_put_buffer(&p, old.side_data[i].data, old.side_data[i].size);
407  bytestream_put_be32(&p, old.side_data[i].size);
408  *p++ = old.side_data[i].type | ((i==old.side_data_elems-1)*128);
409  }
410  bytestream_put_be64(&p, FF_MERGE_MARKER);
411  av_assert0(p-pkt->data == pkt->size);
412  memset(p, 0, AV_INPUT_BUFFER_PADDING_SIZE);
413  av_packet_unref(&old);
414  pkt->side_data_elems = 0;
415  pkt->side_data = NULL;
416  return 1;
417  }
418  return 0;
419 }
420 
422  if (!pkt->side_data_elems && pkt->size >12 && AV_RB64(pkt->data + pkt->size - 8) == FF_MERGE_MARKER){
423  int i;
424  unsigned int size;
425  uint8_t *p;
426 
427  p = pkt->data + pkt->size - 8 - 5;
428  for (i=1; ; i++){
429  size = AV_RB32(p);
430  if (size>INT_MAX - 5 || p - pkt->data < size)
431  return 0;
432  if (p[4]&128)
433  break;
434  if (p - pkt->data < size + 5)
435  return 0;
436  p-= size+5;
437  }
438 
439  pkt->side_data = av_malloc_array(i, sizeof(*pkt->side_data));
440  if (!pkt->side_data)
441  return AVERROR(ENOMEM);
442 
443  p= pkt->data + pkt->size - 8 - 5;
444  for (i=0; ; i++){
445  size= AV_RB32(p);
448  pkt->side_data[i].size = size;
449  pkt->side_data[i].type = p[4]&127;
450  if (!pkt->side_data[i].data)
451  return AVERROR(ENOMEM);
452  memcpy(pkt->side_data[i].data, p-size, size);
453  pkt->size -= size + 5;
454  if(p[4]&128)
455  break;
456  p-= size+5;
457  }
458  pkt->size -= 8;
459  pkt->side_data_elems = i+1;
460  return 1;
461  }
462  return 0;
463 }
464 
465 #endif
466 
468 {
469  AVDictionaryEntry *t = NULL;
470  uint8_t *data = NULL;
471  *size = 0;
472 
473  if (!dict)
474  return NULL;
475 
476  while ((t = av_dict_get(dict, "", t, AV_DICT_IGNORE_SUFFIX))) {
477  const size_t keylen = strlen(t->key);
478  const size_t valuelen = strlen(t->value);
479  const size_t new_size = *size + keylen + 1 + valuelen + 1;
480  uint8_t *const new_data = av_realloc(data, new_size);
481 
482  if (!new_data)
483  goto fail;
484  data = new_data;
485  if (new_size > INT_MAX)
486  goto fail;
487 
488  memcpy(data + *size, t->key, keylen + 1);
489  memcpy(data + *size + keylen + 1, t->value, valuelen + 1);
490 
491  *size = new_size;
492  }
493 
494  return data;
495 
496 fail:
497  av_freep(&data);
498  *size = 0;
499  return NULL;
500 }
501 
503 {
504  const uint8_t *end = data + size;
505  int ret = 0;
506 
507  if (!dict || !data || !size)
508  return ret;
509  if (size && end[-1])
510  return AVERROR_INVALIDDATA;
511  while (data < end) {
512  const uint8_t *key = data;
513  const uint8_t *val = data + strlen(key) + 1;
514 
515  if (val >= end || !*key)
516  return AVERROR_INVALIDDATA;
517 
518  ret = av_dict_set(dict, key, val, 0);
519  if (ret < 0)
520  break;
521  data = val + strlen(val) + 1;
522  }
523 
524  return ret;
525 }
526 
528  int size)
529 {
530  int i;
531 
532  for (i = 0; i < pkt->side_data_elems; i++) {
533  if (pkt->side_data[i].type == type) {
534  if (size > pkt->side_data[i].size)
535  return AVERROR(ENOMEM);
536  pkt->side_data[i].size = size;
537  return 0;
538  }
539  }
540  return AVERROR(ENOENT);
541 }
542 
544 {
545  int i;
546 
547  dst->pts = src->pts;
548  dst->dts = src->dts;
549  dst->pos = src->pos;
550  dst->duration = src->duration;
551 #if FF_API_CONVERGENCE_DURATION
555 #endif
556  dst->flags = src->flags;
557  dst->stream_index = src->stream_index;
558 
559  for (i = 0; i < src->side_data_elems; i++) {
560  enum AVPacketSideDataType type = src->side_data[i].type;
561  int size = src->side_data[i].size;
562  uint8_t *src_data = src->side_data[i].data;
563  uint8_t *dst_data = av_packet_new_side_data(dst, type, size);
564 
565  if (!dst_data) {
567  return AVERROR(ENOMEM);
568  }
569  memcpy(dst_data, src_data, size);
570  }
571 
572  return 0;
573 }
574 
576 {
578  av_buffer_unref(&pkt->buf);
579  av_init_packet(pkt);
580  pkt->data = NULL;
581  pkt->size = 0;
582 }
583 
585 {
586  int ret;
587 
588  ret = av_packet_copy_props(dst, src);
589  if (ret < 0)
590  return ret;
591 
592  if (!src->buf) {
593  ret = packet_alloc(&dst->buf, src->size);
594  if (ret < 0)
595  goto fail;
596  if (src->size)
597  memcpy(dst->buf->data, src->data, src->size);
598 
599  dst->data = dst->buf->data;
600  } else {
601  dst->buf = av_buffer_ref(src->buf);
602  if (!dst->buf) {
603  ret = AVERROR(ENOMEM);
604  goto fail;
605  }
606  dst->data = src->data;
607  }
608 
609  dst->size = src->size;
610 
611  return 0;
612 fail:
614  return ret;
615 }
616 
618 {
619  AVPacket *ret = av_packet_alloc();
620 
621  if (!ret)
622  return ret;
623 
624  if (av_packet_ref(ret, src))
625  av_packet_free(&ret);
626 
627  return ret;
628 }
629 
631 {
632  *dst = *src;
633  av_init_packet(src);
634  src->data = NULL;
635  src->size = 0;
636 }
637 
639 {
640  if (pkt->pts != AV_NOPTS_VALUE)
641  pkt->pts = av_rescale_q(pkt->pts, src_tb, dst_tb);
642  if (pkt->dts != AV_NOPTS_VALUE)
643  pkt->dts = av_rescale_q(pkt->dts, src_tb, dst_tb);
644  if (pkt->duration > 0)
645  pkt->duration = av_rescale_q(pkt->duration, src_tb, dst_tb);
646 #if FF_API_CONVERGENCE_DURATION
648  if (pkt->convergence_duration > 0)
649  pkt->convergence_duration = av_rescale_q(pkt->convergence_duration, src_tb, dst_tb);
651 #endif
652 }
653 
654 int ff_side_data_set_encoder_stats(AVPacket *pkt, int quality, int64_t *error, int error_count, int pict_type)
655 {
656  uint8_t *side_data;
657  int side_data_size;
658  int i;
659 
660  side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_QUALITY_STATS, &side_data_size);
661  if (!side_data) {
662  side_data_size = 4+4+8*error_count;
664  side_data_size);
665  }
666 
667  if (!side_data || side_data_size < 4+4+8*error_count)
668  return AVERROR(ENOMEM);
669 
670  AV_WL32(side_data , quality );
671  side_data[4] = pict_type;
672  side_data[5] = error_count;
673  for (i = 0; i<error_count; i++)
674  AV_WL64(side_data+8 + 8*i , error[i]);
675 
676  return 0;
677 }
int av_packet_split_side_data(AVPacket *pkt)
Definition: avpacket.c:421
#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:1397
A list of zero terminated key/value strings.
Definition: avcodec.h:1566
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:1553
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:654
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:1667
void av_shrink_packet(AVPacket *pkt, int size)
Reduce packet size, correctly zeroing padding.
Definition: avpacket.c:101
Subtitle event position.
Definition: avcodec.h:1540
#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:1471
int size
Definition: avcodec.h:1648
#define ALLOC_BUF(data, size)
Definition: avpacket.c:171
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:222
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:1450
Mastering display metadata (based on SMPTE-2086:2014).
Definition: avcodec.h:1579
#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:502
int av_packet_merge_side_data(AVPacket *pkt)
Definition: avpacket.c:386
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:1665
This side data contains a 3x3 transformation matrix describing an affine transformation that needs to...
Definition: avcodec.h:1465
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:1647
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
Definition: avpacket.c:630
uint8_t * data
Definition: avcodec.h:1591
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:584
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:1572
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:445
An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE bytes worth of palette...
Definition: avcodec.h:1403
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:638
An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows:
Definition: avcodec.h:1429
#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:339
void av_packet_free_side_data(AVPacket *pkt)
Convenience function to free all the side data stored.
Definition: avpacket.c:270
FF_ENABLE_DEPRECATION_WARNINGS int av_dup_packet(AVPacket *pkt)
Definition: avpacket.c:253
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:1630
simple assert() macros that are a bit more flexible than ISO C assert().
enum AVPacketSideDataType type
Definition: avcodec.h:1593
int side_data_elems
Definition: avcodec.h:1659
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:527
int av_buffer_realloc(AVBufferRef **pbuf, int size)
Reallocate a given buffer.
Definition: buffer.c:169
#define fail()
Definition: checkasm.h:89
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1653
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:543
This side data contains quality related information from the encoder.
Definition: avcodec.h:1489
static int packet_alloc(AVBufferRef **buf, int size)
Definition: avpacket.c:71
This side data should be associated with a video stream and corresponds to the AVSphericalMapping str...
Definition: avcodec.h:1585
static void error(const char *err)
AVPacket * av_packet_clone(AVPacket *src)
Create a new packet that references the same data as src.
Definition: avpacket.c:617
The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format that the extradata buffer was...
Definition: avcodec.h:1412
Libavcodec external API header.
A list of zero terminated key/value strings.
Definition: avcodec.h:1529
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:467
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:575
uint8_t * data
The data buffer.
Definition: buffer.h:89
int av_copy_packet(AVPacket *dst, const AVPacket *src)
Copy packet, including contents.
Definition: avpacket.c:264
void * buf
Definition: avisynth_c.h:690
Data found in BlockAdditional element of matroska container.
Definition: avcodec.h:1548
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:1513
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
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:1456
#define FF_MERGE_MARKER
Definition: avpacket.c:384
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:1523
AVPacketSideData * side_data
Additional packet data that can be provided by the container.
Definition: avcodec.h:1658
attribute_deprecated int64_t convergence_duration
Definition: avcodec.h:1676
#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:1559
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:769
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:1646
const char * av_packet_side_data_name(enum AVPacketSideDataType type)
Definition: avpacket.c:356
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:318
int stream_index
Definition: avcodec.h:1649
int av_copy_packet_side_data(AVPacket *pkt, const AVPacket *src)
Copy packet side data.
Definition: avpacket.c:226
This structure stores compressed data.
Definition: avcodec.h:1624
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1640
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define AV_WL32(p, v)
Definition: intreadwrite.h:431
This side data should be associated with an audio stream and corresponds to enum AVAudioServiceType.
Definition: avcodec.h:1477
static uint8_t tmp[11]
Definition: aes_ctr.c:26