FFmpeg
mux.c
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1 /*
2  * muxing functions for use within FFmpeg
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 "avformat.h"
23 #include "internal.h"
24 #include "libavcodec/internal.h"
25 #include "libavutil/opt.h"
26 #include "libavutil/dict.h"
27 #include "libavutil/pixdesc.h"
28 #include "libavutil/timestamp.h"
29 #include "libavutil/avassert.h"
30 #include "libavutil/avstring.h"
31 #include "libavutil/internal.h"
32 #include "libavutil/mathematics.h"
33 
34 /**
35  * @file
36  * muxing functions for use within libavformat
37  */
38 
39 /* fraction handling */
40 
41 /**
42  * f = val + (num / den) + 0.5.
43  *
44  * 'num' is normalized so that it is such as 0 <= num < den.
45  *
46  * @param f fractional number
47  * @param val integer value
48  * @param num must be >= 0
49  * @param den must be >= 1
50  */
51 static void frac_init(FFFrac *f, int64_t val, int64_t num, int64_t den)
52 {
53  num += (den >> 1);
54  if (num >= den) {
55  val += num / den;
56  num = num % den;
57  }
58  f->val = val;
59  f->num = num;
60  f->den = den;
61 }
62 
63 /**
64  * Fractional addition to f: f = f + (incr / f->den).
65  *
66  * @param f fractional number
67  * @param incr increment, can be positive or negative
68  */
69 static void frac_add(FFFrac *f, int64_t incr)
70 {
71  int64_t num, den;
72 
73  num = f->num + incr;
74  den = f->den;
75  if (num < 0) {
76  f->val += num / den;
77  num = num % den;
78  if (num < 0) {
79  num += den;
80  f->val--;
81  }
82  } else if (num >= den) {
83  f->val += num / den;
84  num = num % den;
85  }
86  f->num = num;
87 }
88 
90 {
91  AVRational q;
92  int j;
93 
94  q = st->time_base;
95 
96  for (j=2; j<14; j+= 1+(j>2))
97  while (q.den / q.num < min_precision && q.num % j == 0)
98  q.num /= j;
99  while (q.den / q.num < min_precision && q.den < (1<<24))
100  q.den <<= 1;
101 
102  return q;
103 }
104 
106 {
107  AVCodecParameters *par = st->codecpar;
108  const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(par->format);
109 
111  return par->chroma_location;
112 
113  if (pix_desc) {
114  if (pix_desc->log2_chroma_h == 0) {
115  return AVCHROMA_LOC_TOPLEFT;
116  } else if (pix_desc->log2_chroma_w == 1 && pix_desc->log2_chroma_h == 1) {
118  switch (par->codec_id) {
119  case AV_CODEC_ID_MJPEG:
121  }
122  }
124  switch (par->codec_id) {
126  }
127  }
128  }
129  }
130 
132 
133 }
134 
136  const char *format, const char *filename)
137 {
139  int ret = 0;
140 
141  *avctx = NULL;
142  if (!s)
143  goto nomem;
144 
145  if (!oformat) {
146  if (format) {
147  oformat = av_guess_format(format, NULL, NULL);
148  if (!oformat) {
149  av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
150  ret = AVERROR(EINVAL);
151  goto error;
152  }
153  } else {
154  oformat = av_guess_format(NULL, filename, NULL);
155  if (!oformat) {
156  ret = AVERROR(EINVAL);
157  av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
158  filename);
159  goto error;
160  }
161  }
162  }
163 
164  s->oformat = oformat;
165  if (s->oformat->priv_data_size > 0) {
167  if (!s->priv_data)
168  goto nomem;
169  if (s->oformat->priv_class) {
170  *(const AVClass**)s->priv_data= s->oformat->priv_class;
172  }
173  } else
174  s->priv_data = NULL;
175 
176  if (filename) {
177 #if FF_API_FORMAT_FILENAME
179  av_strlcpy(s->filename, filename, sizeof(s->filename));
181 #endif
182  if (!(s->url = av_strdup(filename)))
183  goto nomem;
184 
185  }
186  *avctx = s;
187  return 0;
188 nomem:
189  av_log(s, AV_LOG_ERROR, "Out of memory\n");
190  ret = AVERROR(ENOMEM);
191 error:
193  return ret;
194 }
195 
197 {
198  const AVCodecTag *avctag;
199  int n;
200  enum AVCodecID id = AV_CODEC_ID_NONE;
201  int64_t tag = -1;
202 
203  /**
204  * Check that tag + id is in the table
205  * If neither is in the table -> OK
206  * If tag is in the table with another id -> FAIL
207  * If id is in the table with another tag -> FAIL unless strict < normal
208  */
209  for (n = 0; s->oformat->codec_tag[n]; n++) {
210  avctag = s->oformat->codec_tag[n];
211  while (avctag->id != AV_CODEC_ID_NONE) {
212  if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codecpar->codec_tag)) {
213  id = avctag->id;
214  if (id == st->codecpar->codec_id)
215  return 1;
216  }
217  if (avctag->id == st->codecpar->codec_id)
218  tag = avctag->tag;
219  avctag++;
220  }
221  }
222  if (id != AV_CODEC_ID_NONE)
223  return 0;
224  if (tag >= 0 && (s->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
225  return 0;
226  return 1;
227 }
228 
229 
231 {
232  int ret = 0, i;
233  AVStream *st;
234  AVDictionary *tmp = NULL;
235  AVCodecParameters *par = NULL;
236  const AVOutputFormat *of = s->oformat;
237  const AVCodecDescriptor *desc;
239 
240  if (options)
241  av_dict_copy(&tmp, *options, 0);
242 
243  if ((ret = av_opt_set_dict(s, &tmp)) < 0)
244  goto fail;
245  if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
246  (ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
247  goto fail;
248 
249 #if FF_API_FORMAT_FILENAME
251  if (!s->url && !(s->url = av_strdup(s->filename))) {
253 #else
254  if (!s->url && !(s->url = av_strdup(""))) {
255 #endif
256  ret = AVERROR(ENOMEM);
257  goto fail;
258  }
259 
260 #if FF_API_LAVF_AVCTX
262  if (s->nb_streams && s->streams[0]->codec->flags & AV_CODEC_FLAG_BITEXACT) {
263  if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
265  "The AVFormatContext is not in set to bitexact mode, only "
266  "the AVCodecContext. If this is not intended, set "
267  "AVFormatContext.flags |= AVFMT_FLAG_BITEXACT.\n");
268  }
269  }
271 #endif
272 
273  // some sanity checks
274  if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
275  av_log(s, AV_LOG_ERROR, "No streams to mux were specified\n");
276  ret = AVERROR(EINVAL);
277  goto fail;
278  }
279 
280  for (i = 0; i < s->nb_streams; i++) {
281  st = s->streams[i];
282  par = st->codecpar;
283 
284 #if FF_API_LAVF_AVCTX
287  st->codec->codec_type != AVMEDIA_TYPE_UNKNOWN) {
288  av_log(s, AV_LOG_WARNING, "Using AVStream.codec to pass codec "
289  "parameters to muxers is deprecated, use AVStream.codecpar "
290  "instead.\n");
291  ret = avcodec_parameters_from_context(st->codecpar, st->codec);
292  if (ret < 0)
293  goto fail;
294  }
296 #endif
297 
298  if (!st->time_base.num) {
299  /* fall back on the default timebase values */
300  if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->sample_rate)
301  avpriv_set_pts_info(st, 64, 1, par->sample_rate);
302  else
303  avpriv_set_pts_info(st, 33, 1, 90000);
304  }
305 
306  switch (par->codec_type) {
307  case AVMEDIA_TYPE_AUDIO:
308  if (par->sample_rate <= 0) {
309  av_log(s, AV_LOG_ERROR, "sample rate not set\n");
310  ret = AVERROR(EINVAL);
311  goto fail;
312  }
313  if (!par->block_align)
314  par->block_align = par->channels *
315  av_get_bits_per_sample(par->codec_id) >> 3;
316  break;
317  case AVMEDIA_TYPE_VIDEO:
318  if ((par->width <= 0 || par->height <= 0) &&
319  !(of->flags & AVFMT_NODIMENSIONS)) {
320  av_log(s, AV_LOG_ERROR, "dimensions not set\n");
321  ret = AVERROR(EINVAL);
322  goto fail;
323  }
326  ) {
327  if (st->sample_aspect_ratio.num != 0 &&
328  st->sample_aspect_ratio.den != 0 &&
329  par->sample_aspect_ratio.num != 0 &&
330  par->sample_aspect_ratio.den != 0) {
331  av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
332  "(%d/%d) and encoder layer (%d/%d)\n",
335  par->sample_aspect_ratio.den);
336  ret = AVERROR(EINVAL);
337  goto fail;
338  }
339  }
340  break;
341  }
342 
343  desc = avcodec_descriptor_get(par->codec_id);
344  if (desc && desc->props & AV_CODEC_PROP_REORDER)
345  st->internal->reorder = 1;
346 
348 
349  if (of->codec_tag) {
350  if ( par->codec_tag
351  && par->codec_id == AV_CODEC_ID_RAWVIDEO
352  && ( av_codec_get_tag(of->codec_tag, par->codec_id) == 0
353  || av_codec_get_tag(of->codec_tag, par->codec_id) == MKTAG('r', 'a', 'w', ' '))
354  && !validate_codec_tag(s, st)) {
355  // the current rawvideo encoding system ends up setting
356  // the wrong codec_tag for avi/mov, we override it here
357  par->codec_tag = 0;
358  }
359  if (par->codec_tag) {
360  if (!validate_codec_tag(s, st)) {
361  const uint32_t otag = av_codec_get_tag(s->oformat->codec_tag, par->codec_id);
362  av_log(s, AV_LOG_ERROR,
363  "Tag %s incompatible with output codec id '%d' (%s)\n",
364  av_fourcc2str(par->codec_tag), par->codec_id, av_fourcc2str(otag));
365  ret = AVERROR_INVALIDDATA;
366  goto fail;
367  }
368  } else
369  par->codec_tag = av_codec_get_tag(of->codec_tag, par->codec_id);
370  }
371 
374  }
375 
376  if (!s->priv_data && of->priv_data_size > 0) {
378  if (!s->priv_data) {
379  ret = AVERROR(ENOMEM);
380  goto fail;
381  }
382  if (of->priv_class) {
383  *(const AVClass **)s->priv_data = of->priv_class;
385  if ((ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
386  goto fail;
387  }
388  }
389 
390  /* set muxer identification string */
391  if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
392  av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
393  } else {
394  av_dict_set(&s->metadata, "encoder", NULL, 0);
395  }
396 
397  for (e = NULL; e = av_dict_get(s->metadata, "encoder-", e, AV_DICT_IGNORE_SUFFIX); ) {
398  av_dict_set(&s->metadata, e->key, NULL, 0);
399  }
400 
401  if (options) {
402  av_dict_free(options);
403  *options = tmp;
404  }
405 
406  if (s->oformat->init) {
407  if ((ret = s->oformat->init(s)) < 0) {
408  if (s->oformat->deinit)
409  s->oformat->deinit(s);
410  return ret;
411  }
412  return ret == 0;
413  }
414 
415  return 0;
416 
417 fail:
418  av_dict_free(&tmp);
419  return ret;
420 }
421 
422 static int init_pts(AVFormatContext *s)
423 {
424  int i;
425  AVStream *st;
426 
427  /* init PTS generation */
428  for (i = 0; i < s->nb_streams; i++) {
429  int64_t den = AV_NOPTS_VALUE;
430  st = s->streams[i];
431 
432  switch (st->codecpar->codec_type) {
433  case AVMEDIA_TYPE_AUDIO:
434  den = (int64_t)st->time_base.num * st->codecpar->sample_rate;
435  break;
436  case AVMEDIA_TYPE_VIDEO:
437  den = (int64_t)st->time_base.num * st->time_base.den;
438  break;
439  default:
440  break;
441  }
442 
443  if (!st->internal->priv_pts)
444  st->internal->priv_pts = av_mallocz(sizeof(*st->internal->priv_pts));
445  if (!st->internal->priv_pts)
446  return AVERROR(ENOMEM);
447 
448  if (den != AV_NOPTS_VALUE) {
449  if (den <= 0)
450  return AVERROR_INVALIDDATA;
451 
452  frac_init(st->internal->priv_pts, 0, 0, den);
453  }
454  }
455 
456  if (s->avoid_negative_ts < 0) {
459  s->avoid_negative_ts = 0;
460  } else
462  }
463 
464  return 0;
465 }
466 
468 {
469  if (s->pb && s->pb->error >= 0) {
470  if (s->flush_packets == 1 || s->flags & AVFMT_FLAG_FLUSH_PACKETS)
471  avio_flush(s->pb);
472  else if (s->flush_packets && !(s->oformat->flags & AVFMT_NOFILE))
474  }
475 }
476 
478 {
479  if (s->oformat && s->oformat->deinit && s->internal->initialized)
480  s->oformat->deinit(s);
481  s->internal->initialized =
483 }
484 
486 {
487  int ret = 0;
488 
489  if ((ret = init_muxer(s, options)) < 0)
490  return ret;
491 
492  s->internal->initialized = 1;
494 
495  if (s->oformat->init && ret) {
496  if ((ret = init_pts(s)) < 0)
497  return ret;
498 
500  }
501 
503 }
504 
506 {
507  int ret = 0;
508  int already_initialized = s->internal->initialized;
509  int streams_already_initialized = s->internal->streams_initialized;
510 
511  if (!already_initialized)
512  if ((ret = avformat_init_output(s, options)) < 0)
513  return ret;
514 
515  if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
517  if (s->oformat->write_header) {
518  ret = s->oformat->write_header(s);
519  if (ret >= 0 && s->pb && s->pb->error < 0)
520  ret = s->pb->error;
521  if (ret < 0)
522  goto fail;
523  flush_if_needed(s);
524  }
525  if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
527 
528  if (!s->internal->streams_initialized) {
529  if ((ret = init_pts(s)) < 0)
530  goto fail;
531  }
532 
533  return streams_already_initialized;
534 
535 fail:
536  deinit_muxer(s);
537  return ret;
538 }
539 
540 #define AV_PKT_FLAG_UNCODED_FRAME 0x2000
541 
542 
543 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
545 //FIXME merge with compute_pkt_fields
546 static int compute_muxer_pkt_fields(AVFormatContext *s, AVStream *st, AVPacket *pkt)
547 {
548  int delay = FFMAX(st->codecpar->video_delay, st->internal->avctx->max_b_frames > 0);
549  int i;
550  int frame_size;
551 
552  if (!s->internal->missing_ts_warning &&
553  !(s->oformat->flags & AVFMT_NOTIMESTAMPS) &&
555  (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE)) {
557  "Timestamps are unset in a packet for stream %d. "
558  "This is deprecated and will stop working in the future. "
559  "Fix your code to set the timestamps properly\n", st->index);
560  s->internal->missing_ts_warning = 1;
561  }
562 
563  if (s->debug & FF_FDEBUG_TS)
564  av_log(s, AV_LOG_DEBUG, "compute_muxer_pkt_fields: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
565  av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
566 
567  if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
568  pkt->pts = pkt->dts;
569 
570  //XXX/FIXME this is a temporary hack until all encoders output pts
571  if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
572  static int warned;
573  if (!warned) {
574  av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
575  warned = 1;
576  }
577  pkt->dts =
578 // pkt->pts= st->cur_dts;
579  pkt->pts = st->internal->priv_pts->val;
580  }
581 
582  //calculate dts from pts
583  if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
584  st->internal->pts_buffer[0] = pkt->pts;
585  for (i = 1; i < delay + 1 && st->internal->pts_buffer[i] == AV_NOPTS_VALUE; i++)
586  st->internal->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
587  for (i = 0; i<delay && st->internal->pts_buffer[i] > st->internal->pts_buffer[i + 1]; i++)
588  FFSWAP(int64_t, st->internal->pts_buffer[i], st->internal->pts_buffer[i + 1]);
589 
590  pkt->dts = st->internal->pts_buffer[0];
591  }
592 
593  if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
594  ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
597  st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
598  av_log(s, AV_LOG_ERROR,
599  "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
600  st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
601  return AVERROR(EINVAL);
602  }
603  if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
604  av_log(s, AV_LOG_ERROR,
605  "pts (%s) < dts (%s) in stream %d\n",
606  av_ts2str(pkt->pts), av_ts2str(pkt->dts),
607  st->index);
608  return AVERROR(EINVAL);
609  }
610 
611  if (s->debug & FF_FDEBUG_TS)
612  av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%s dts2:%s\n",
613  av_ts2str(pkt->pts), av_ts2str(pkt->dts));
614 
615  st->cur_dts = pkt->dts;
616  st->internal->priv_pts->val = pkt->dts;
617 
618  /* update pts */
619  switch (st->codecpar->codec_type) {
620  case AVMEDIA_TYPE_AUDIO:
621  frame_size = (pkt->flags & AV_PKT_FLAG_UNCODED_FRAME) ?
622  (*(AVFrame **)pkt->data)->nb_samples :
623  av_get_audio_frame_duration(st->codec, pkt->size);
624 
625  /* HACK/FIXME, we skip the initial 0 size packets as they are most
626  * likely equal to the encoder delay, but it would be better if we
627  * had the real timestamps from the encoder */
628  if (frame_size >= 0 && (pkt->size || st->internal->priv_pts->num != st->internal->priv_pts->den >> 1 || st->internal->priv_pts->val)) {
629  frac_add(st->internal->priv_pts, (int64_t)st->time_base.den * frame_size);
630  }
631  break;
632  case AVMEDIA_TYPE_VIDEO:
633  frac_add(st->internal->priv_pts, (int64_t)st->time_base.den * st->time_base.num);
634  break;
635  }
636  return 0;
637 }
639 #endif
640 
642 {
643  if (pkt->duration < 0 && st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE) {
644  av_log(s, AV_LOG_WARNING, "Packet with invalid duration %"PRId64" in stream %d\n",
645  pkt->duration, pkt->stream_index);
646  pkt->duration = 0;
647  }
648 
649  if (pkt->duration)
650  return;
651 
652  switch (st->codecpar->codec_type) {
653  case AVMEDIA_TYPE_VIDEO:
654  if (st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0) {
656  st->time_base);
657  } else if (st->time_base.num * 1000LL > st->time_base.den)
658  pkt->duration = 1;
659  break;
660  case AVMEDIA_TYPE_AUDIO: {
662  if (frame_size && st->codecpar->sample_rate) {
663  pkt->duration = av_rescale_q(frame_size,
664  (AVRational){1, st->codecpar->sample_rate},
665  st->time_base);
666  }
667  break;
668  }
669  }
670 }
671 
672 /**
673  * Shift timestamps and call muxer; the original pts/dts are not kept.
674  *
675  * FIXME: this function should NEVER get undefined pts/dts beside when the
676  * AVFMT_NOTIMESTAMPS is set.
677  * Those additional safety checks should be dropped once the correct checks
678  * are set in the callers.
679  */
681 {
682  int ret;
683 
684  // If the timestamp offsetting below is adjusted, adjust
685  // ff_interleaved_peek similarly.
686  if (s->output_ts_offset) {
687  AVStream *st = s->streams[pkt->stream_index];
689 
690  if (pkt->dts != AV_NOPTS_VALUE)
691  pkt->dts += offset;
692  if (pkt->pts != AV_NOPTS_VALUE)
693  pkt->pts += offset;
694  }
695 
696  if (s->avoid_negative_ts > 0) {
697  AVStream *st = s->streams[pkt->stream_index];
698  int64_t offset = st->internal->mux_ts_offset;
699  int64_t ts = s->internal->avoid_negative_ts_use_pts ? pkt->pts : pkt->dts;
700 
701  if (s->internal->offset == AV_NOPTS_VALUE && ts != AV_NOPTS_VALUE &&
702  (ts < 0 || s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO)) {
703  s->internal->offset = -ts;
705  }
706 
707  if (s->internal->offset != AV_NOPTS_VALUE && !offset) {
708  offset = st->internal->mux_ts_offset =
711  st->time_base,
712  AV_ROUND_UP);
713  }
714 
715  if (pkt->dts != AV_NOPTS_VALUE)
716  pkt->dts += offset;
717  if (pkt->pts != AV_NOPTS_VALUE)
718  pkt->pts += offset;
719 
721  if (pkt->pts != AV_NOPTS_VALUE && pkt->pts < 0) {
722  av_log(s, AV_LOG_WARNING, "failed to avoid negative "
723  "pts %s in stream %d.\n"
724  "Try -avoid_negative_ts 1 as a possible workaround.\n",
725  av_ts2str(pkt->pts),
726  pkt->stream_index
727  );
728  }
729  } else {
730  av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0 || s->max_interleave_delta > 0);
731  if (pkt->dts != AV_NOPTS_VALUE && pkt->dts < 0) {
733  "Packets poorly interleaved, failed to avoid negative "
734  "timestamp %s in stream %d.\n"
735  "Try -max_interleave_delta 0 as a possible workaround.\n",
736  av_ts2str(pkt->dts),
737  pkt->stream_index
738  );
739  }
740  }
741  }
742 
743  if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
744  AVFrame **frame = (AVFrame **)pkt->data;
745  av_assert0(pkt->size == sizeof(*frame));
746  ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, frame, 0);
747  } else {
748  ret = s->oformat->write_packet(s, pkt);
749  }
750 
751  if (s->pb && ret >= 0) {
752  flush_if_needed(s);
753  if (s->pb->error < 0)
754  ret = s->pb->error;
755  }
756 
757  if (ret >= 0)
758  s->streams[pkt->stream_index]->nb_frames++;
759 
760  return ret;
761 }
762 
764 {
765  if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
766  av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
767  pkt->stream_index);
768  return AVERROR(EINVAL);
769  }
770 
772  av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
773  return AVERROR(EINVAL);
774  }
775 
776  return 0;
777 }
778 
780 {
781 #if !FF_API_COMPUTE_PKT_FIELDS2 || !FF_API_LAVF_AVCTX
782  /* sanitize the timestamps */
783  if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
784 
785  /* when there is no reordering (so dts is equal to pts), but
786  * only one of them is set, set the other as well */
787  if (!st->internal->reorder) {
788  if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE)
789  pkt->pts = pkt->dts;
790  if (pkt->dts == AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE)
791  pkt->dts = pkt->pts;
792  }
793 
794  /* check that the timestamps are set */
795  if (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE) {
796  av_log(s, AV_LOG_ERROR,
797  "Timestamps are unset in a packet for stream %d\n", st->index);
798  return AVERROR(EINVAL);
799  }
800 
801  /* check that the dts are increasing (or at least non-decreasing,
802  * if the format allows it */
803  if (st->cur_dts != AV_NOPTS_VALUE &&
804  ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && st->cur_dts >= pkt->dts) ||
805  st->cur_dts > pkt->dts)) {
806  av_log(s, AV_LOG_ERROR,
807  "Application provided invalid, non monotonically increasing "
808  "dts to muxer in stream %d: %" PRId64 " >= %" PRId64 "\n",
809  st->index, st->cur_dts, pkt->dts);
810  return AVERROR(EINVAL);
811  }
812 
813  if (pkt->pts < pkt->dts) {
814  av_log(s, AV_LOG_ERROR, "pts %" PRId64 " < dts %" PRId64 " in stream %d\n",
815  pkt->pts, pkt->dts, st->index);
816  return AVERROR(EINVAL);
817  }
818  }
819 #endif
820  /* update flags */
821  if (st->internal->is_intra_only)
822  pkt->flags |= AV_PKT_FLAG_KEY;
823 
824  return 0;
825 }
826 
827 #define CHUNK_START 0x1000
828 
830  int (*compare)(AVFormatContext *, const AVPacket *, const AVPacket *))
831 {
832  int ret;
833  AVPacketList **next_point, *this_pktl;
834  AVStream *st = s->streams[pkt->stream_index];
835  int chunked = s->max_chunk_size || s->max_chunk_duration;
836 
837  this_pktl = av_malloc(sizeof(AVPacketList));
838  if (!this_pktl) {
839  av_packet_unref(pkt);
840  return AVERROR(ENOMEM);
841  }
842  if ((ret = av_packet_make_refcounted(pkt)) < 0) {
843  av_free(this_pktl);
844  av_packet_unref(pkt);
845  return ret;
846  }
847 
848  av_packet_move_ref(&this_pktl->pkt, pkt);
849  pkt = &this_pktl->pkt;
850 
851  if (st->internal->last_in_packet_buffer) {
852  next_point = &(st->internal->last_in_packet_buffer->next);
853  } else {
854  next_point = &s->internal->packet_buffer;
855  }
856 
857  if (chunked) {
859  st->internal->interleaver_chunk_size += pkt->size;
862  || (max && st->internal->interleaver_chunk_duration > max)) {
864  pkt->flags |= CHUNK_START;
865  if (max && st->internal->interleaver_chunk_duration > max) {
866  int64_t syncoffset = (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
867  int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
868 
869  st->internal->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
870  } else
872  }
873  }
874  if (*next_point) {
875  if (chunked && !(pkt->flags & CHUNK_START))
876  goto next_non_null;
877 
878  if (compare(s, &s->internal->packet_buffer_end->pkt, pkt)) {
879  while ( *next_point
880  && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
881  || !compare(s, &(*next_point)->pkt, pkt)))
882  next_point = &(*next_point)->next;
883  if (*next_point)
884  goto next_non_null;
885  } else {
886  next_point = &(s->internal->packet_buffer_end->next);
887  }
888  }
889  av_assert1(!*next_point);
890 
891  s->internal->packet_buffer_end = this_pktl;
892 next_non_null:
893 
894  this_pktl->next = *next_point;
895 
896  st->internal->last_in_packet_buffer = *next_point = this_pktl;
897 
898  return 0;
899 }
900 
902  const AVPacket *pkt)
903 {
904  AVStream *st = s->streams[pkt->stream_index];
905  AVStream *st2 = s->streams[next->stream_index];
906  int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
907  st->time_base);
908  if (s->audio_preload) {
909  int preload = st ->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
910  int preload2 = st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
911  if (preload != preload2) {
912  int64_t ts, ts2;
913  preload *= s->audio_preload;
914  preload2 *= s->audio_preload;
915  ts = av_rescale_q(pkt ->dts, st ->time_base, AV_TIME_BASE_Q) - preload;
916  ts2= av_rescale_q(next->dts, st2->time_base, AV_TIME_BASE_Q) - preload2;
917  if (ts == ts2) {
918  ts = ((uint64_t)pkt ->dts*st ->time_base.num*AV_TIME_BASE - (uint64_t)preload *st ->time_base.den)*st2->time_base.den
919  - ((uint64_t)next->dts*st2->time_base.num*AV_TIME_BASE - (uint64_t)preload2*st2->time_base.den)*st ->time_base.den;
920  ts2 = 0;
921  }
922  comp = (ts2 > ts) - (ts2 < ts);
923  }
924  }
925 
926  if (comp == 0)
927  return pkt->stream_index < next->stream_index;
928  return comp > 0;
929 }
930 
932  AVPacket *pkt, int flush)
933 {
934  AVPacketList *pktl;
935  int stream_count = 0;
936  int noninterleaved_count = 0;
937  int i, ret;
938  int eof = flush;
939 
940  if (pkt) {
941  if ((ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts)) < 0)
942  return ret;
943  }
944 
945  for (i = 0; i < s->nb_streams; i++) {
946  if (s->streams[i]->internal->last_in_packet_buffer) {
947  ++stream_count;
948  } else if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
951  ++noninterleaved_count;
952  }
953  }
954 
955  if (s->internal->nb_interleaved_streams == stream_count)
956  flush = 1;
957 
958  if (s->max_interleave_delta > 0 &&
959  s->internal->packet_buffer &&
960  !flush &&
961  s->internal->nb_interleaved_streams == stream_count+noninterleaved_count
962  ) {
963  AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
964  int64_t delta_dts = INT64_MIN;
965  int64_t top_dts = av_rescale_q(top_pkt->dts,
966  s->streams[top_pkt->stream_index]->time_base,
968 
969  for (i = 0; i < s->nb_streams; i++) {
970  int64_t last_dts;
972 
973  if (!last)
974  continue;
975 
976  last_dts = av_rescale_q(last->pkt.dts,
977  s->streams[i]->time_base,
979  delta_dts = FFMAX(delta_dts, last_dts - top_dts);
980  }
981 
982  if (delta_dts > s->max_interleave_delta) {
983  av_log(s, AV_LOG_DEBUG,
984  "Delay between the first packet and last packet in the "
985  "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
986  delta_dts, s->max_interleave_delta);
987  flush = 1;
988  }
989  }
990 
991  if (s->internal->packet_buffer &&
992  eof &&
993  (s->flags & AVFMT_FLAG_SHORTEST) &&
995  AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
996 
997  s->internal->shortest_end = av_rescale_q(top_pkt->dts,
998  s->streams[top_pkt->stream_index]->time_base,
1000  }
1001 
1002  if (s->internal->shortest_end != AV_NOPTS_VALUE) {
1003  while (s->internal->packet_buffer) {
1004  AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1005  AVStream *st;
1006  int64_t top_dts = av_rescale_q(top_pkt->dts,
1007  s->streams[top_pkt->stream_index]->time_base,
1008  AV_TIME_BASE_Q);
1009 
1010  if (s->internal->shortest_end + 1 >= top_dts)
1011  break;
1012 
1013  pktl = s->internal->packet_buffer;
1014  st = s->streams[pktl->pkt.stream_index];
1015 
1016  s->internal->packet_buffer = pktl->next;
1017  if (!s->internal->packet_buffer)
1019 
1020  if (st->internal->last_in_packet_buffer == pktl)
1022 
1023  av_packet_unref(&pktl->pkt);
1024  av_freep(&pktl);
1025  flush = 0;
1026  }
1027  }
1028 
1029  if (stream_count && flush) {
1030  AVStream *st;
1031  pktl = s->internal->packet_buffer;
1032  *out = pktl->pkt;
1033  st = s->streams[out->stream_index];
1034 
1035  s->internal->packet_buffer = pktl->next;
1036  if (!s->internal->packet_buffer)
1038 
1039  if (st->internal->last_in_packet_buffer == pktl)
1041  av_freep(&pktl);
1042 
1043  return 1;
1044  } else {
1045  return 0;
1046  }
1047 }
1048 
1050  AVPacket *pkt, int add_offset)
1051 {
1052  AVPacketList *pktl = s->internal->packet_buffer;
1053  while (pktl) {
1054  if (pktl->pkt.stream_index == stream) {
1055  *pkt = pktl->pkt;
1056  if (add_offset) {
1057  AVStream *st = s->streams[pkt->stream_index];
1058  int64_t offset = st->internal->mux_ts_offset;
1059 
1060  if (s->output_ts_offset)
1062 
1063  if (pkt->dts != AV_NOPTS_VALUE)
1064  pkt->dts += offset;
1065  if (pkt->pts != AV_NOPTS_VALUE)
1066  pkt->pts += offset;
1067  }
1068  return 0;
1069  }
1070  pktl = pktl->next;
1071  }
1072  return AVERROR(ENOENT);
1073 }
1074 
1075 /**
1076  * Interleave an AVPacket correctly so it can be muxed.
1077  * @param out the interleaved packet will be output here
1078  * @param in the input packet; will always be blank on return if not NULL
1079  * @param flush 1 if no further packets are available as input and all
1080  * remaining packets should be output
1081  * @return 1 if a packet was output, 0 if no packet could be output,
1082  * < 0 if an error occurred
1083  */
1085 {
1086  if (s->oformat->interleave_packet) {
1087  return s->oformat->interleave_packet(s, out, in, flush);
1088  } else
1089  return ff_interleave_packet_per_dts(s, out, in, flush);
1090 }
1091 
1093 {
1094  int ret;
1095 
1096  if (!(s->flags & AVFMT_FLAG_AUTO_BSF))
1097  return 1;
1098 
1099  if (s->oformat->check_bitstream) {
1100  if (!st->internal->bitstream_checked) {
1101  if ((ret = s->oformat->check_bitstream(s, pkt)) < 0)
1102  return ret;
1103  else if (ret == 1)
1104  st->internal->bitstream_checked = 1;
1105  }
1106  }
1107 
1108  return 1;
1109 }
1110 
1112 {
1113  for (;; ) {
1114  AVPacket opkt;
1115  int ret = interleave_packet(s, &opkt, pkt, flush);
1116  if (ret <= 0)
1117  return ret;
1118 
1119  pkt = NULL;
1120 
1121  ret = write_packet(s, &opkt);
1122 
1123  av_packet_unref(&opkt);
1124 
1125  if (ret < 0)
1126  return ret;
1127  }
1128 }
1129 
1130 static int write_packet_common(AVFormatContext *s, AVStream *st, AVPacket *pkt, int interleaved)
1131 {
1132  int ret;
1133 
1134  if (s->debug & FF_FDEBUG_TS)
1135  av_log(s, AV_LOG_DEBUG, "%s size:%d dts:%s pts:%s\n", __FUNCTION__,
1136  pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
1137 
1138  guess_pkt_duration(s, st, pkt);
1139 
1140 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
1141  if ((ret = compute_muxer_pkt_fields(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1142  return ret;
1143 #endif
1144 
1145  if (interleaved) {
1146  if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1147  return AVERROR(EINVAL);
1148  return interleaved_write_packet(s, pkt, 0);
1149  } else {
1150  return write_packet(s, pkt);
1151  }
1152 }
1153 
1154 static int write_packets_from_bsfs(AVFormatContext *s, AVStream *st, AVPacket *pkt, int interleaved)
1155 {
1156  AVBSFContext *bsfc = st->internal->bsfc;
1157  int ret;
1158 
1159  if ((ret = av_bsf_send_packet(bsfc, pkt)) < 0) {
1160  av_log(s, AV_LOG_ERROR,
1161  "Failed to send packet to filter %s for stream %d\n",
1162  bsfc->filter->name, st->index);
1163  return ret;
1164  }
1165 
1166  do {
1167  ret = av_bsf_receive_packet(bsfc, pkt);
1168  if (ret < 0) {
1169  if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
1170  return 0;
1171  av_log(s, AV_LOG_ERROR, "Error applying bitstream filters to an output "
1172  "packet for stream #%d: %s\n", st->index, av_err2str(ret));
1173  if (!(s->error_recognition & AV_EF_EXPLODE) && ret != AVERROR(ENOMEM))
1174  continue;
1175  return ret;
1176  }
1177  av_packet_rescale_ts(pkt, bsfc->time_base_out, st->time_base);
1178  ret = write_packet_common(s, st, pkt, interleaved);
1179  if (ret >= 0 && !interleaved) // a successful write_packet_common already unrefed pkt for interleaved
1180  av_packet_unref(pkt);
1181  } while (ret >= 0);
1182 
1183  return ret;
1184 }
1185 
1186 static int write_packets_common(AVFormatContext *s, AVPacket *pkt, int interleaved)
1187 {
1188  AVStream *st;
1189  int ret = check_packet(s, pkt);
1190  if (ret < 0)
1191  return ret;
1192  st = s->streams[pkt->stream_index];
1193 
1194  ret = prepare_input_packet(s, st, pkt);
1195  if (ret < 0)
1196  return ret;
1197 
1198  ret = check_bitstream(s, st, pkt);
1199  if (ret < 0)
1200  return ret;
1201 
1202  if (st->internal->bsfc) {
1203  return write_packets_from_bsfs(s, st, pkt, interleaved);
1204  } else {
1205  return write_packet_common(s, st, pkt, interleaved);
1206  }
1207 }
1208 
1210 {
1211  AVPacket local_pkt, *pkt = &local_pkt;
1212  int ret;
1213 
1214  if (!in) {
1215  if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
1216  ret = s->oformat->write_packet(s, NULL);
1217  flush_if_needed(s);
1218  if (ret >= 0 && s->pb && s->pb->error < 0)
1219  ret = s->pb->error;
1220  return ret;
1221  }
1222  return 1;
1223  }
1224 
1225  if (in->flags & AV_PKT_FLAG_UNCODED_FRAME) {
1226  pkt = in;
1227  } else {
1228  /* We don't own in, so we have to make sure not to modify it.
1229  * The following avoids copying in's data unnecessarily.
1230  * Copying side data is unavoidable as a bitstream filter
1231  * may change it, e.g. free it on errors. */
1232  pkt->buf = NULL;
1233  pkt->data = in->data;
1234  pkt->size = in->size;
1235  ret = av_packet_copy_props(pkt, in);
1236  if (ret < 0)
1237  return ret;
1238  if (in->buf) {
1239  pkt->buf = av_buffer_ref(in->buf);
1240  if (!pkt->buf) {
1241  ret = AVERROR(ENOMEM);
1242  goto fail;
1243  }
1244  }
1245  }
1246 
1247  ret = write_packets_common(s, pkt, 0/*non-interleaved*/);
1248 
1249 fail:
1250  // Uncoded frames using the noninterleaved codepath are also freed here
1251  av_packet_unref(pkt);
1252  return ret;
1253 }
1254 
1256 {
1257  int ret;
1258 
1259  if (pkt) {
1260  ret = write_packets_common(s, pkt, 1/*interleaved*/);
1261  if (ret < 0)
1262  av_packet_unref(pkt);
1263  return ret;
1264  } else {
1265  av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame FLUSH\n");
1266  return interleaved_write_packet(s, NULL, 1/*flush*/);
1267  }
1268 }
1269 
1271 {
1272  int i, ret1, ret = 0;
1273  AVPacket pkt = {0};
1274  av_init_packet(&pkt);
1275 
1276  for (i = 0; i < s->nb_streams; i++) {
1277  if (s->streams[i]->internal->bsfc) {
1278  ret1 = write_packets_from_bsfs(s, s->streams[i], &pkt, 1/*interleaved*/);
1279  if (ret1 < 0)
1280  av_packet_unref(&pkt);
1281  if (ret >= 0)
1282  ret = ret1;
1283  }
1284  }
1285  ret1 = interleaved_write_packet(s, NULL, 1);
1286  if (ret >= 0)
1287  ret = ret1;
1288 
1289  if (s->oformat->write_trailer) {
1290  if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1292  if (ret >= 0) {
1293  ret = s->oformat->write_trailer(s);
1294  } else {
1295  s->oformat->write_trailer(s);
1296  }
1297  }
1298 
1299  deinit_muxer(s);
1300 
1301  if (s->pb)
1302  avio_flush(s->pb);
1303  if (ret == 0)
1304  ret = s->pb ? s->pb->error : 0;
1305  for (i = 0; i < s->nb_streams; i++) {
1306  av_freep(&s->streams[i]->priv_data);
1308  }
1309  if (s->oformat->priv_class)
1310  av_opt_free(s->priv_data);
1311  av_freep(&s->priv_data);
1312  return ret;
1313 }
1314 
1315 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
1316  int64_t *dts, int64_t *wall)
1317 {
1318  if (!s->oformat || !s->oformat->get_output_timestamp)
1319  return AVERROR(ENOSYS);
1320  s->oformat->get_output_timestamp(s, stream, dts, wall);
1321  return 0;
1322 }
1323 
1324 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
1326 {
1327  AVPacket local_pkt;
1328  int ret;
1329 
1330  local_pkt = *pkt;
1331  local_pkt.stream_index = dst_stream;
1332 
1333  av_packet_rescale_ts(&local_pkt,
1334  src->streams[pkt->stream_index]->time_base,
1335  dst->streams[dst_stream]->time_base);
1336 
1337  if (interleave) ret = av_interleaved_write_frame(dst, &local_pkt);
1338  else ret = av_write_frame(dst, &local_pkt);
1339  pkt->buf = local_pkt.buf;
1340  pkt->side_data = local_pkt.side_data;
1341  pkt->side_data_elems = local_pkt.side_data_elems;
1342  return ret;
1343 }
1344 
1345 static void uncoded_frame_free(void *unused, uint8_t *data)
1346 {
1347  av_frame_free((AVFrame **)data);
1348  av_free(data);
1349 }
1350 
1351 static int write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
1352  AVFrame *frame, int interleaved)
1353 {
1354  AVPacket pkt, *pktp;
1355 
1356  av_assert0(s->oformat);
1357  if (!s->oformat->write_uncoded_frame) {
1358  av_frame_free(&frame);
1359  return AVERROR(ENOSYS);
1360  }
1361 
1362  if (!frame) {
1363  pktp = NULL;
1364  } else {
1365  size_t bufsize = sizeof(frame) + AV_INPUT_BUFFER_PADDING_SIZE;
1366  AVFrame **framep = av_mallocz(bufsize);
1367 
1368  if (!framep)
1369  goto fail;
1370  pktp = &pkt;
1371  av_init_packet(&pkt);
1372  pkt.buf = av_buffer_create((void *)framep, bufsize,
1373  uncoded_frame_free, NULL, 0);
1374  if (!pkt.buf) {
1375  av_free(framep);
1376  fail:
1377  av_frame_free(&frame);
1378  return AVERROR(ENOMEM);
1379  }
1380  *framep = frame;
1381 
1382  pkt.data = (void *)framep;
1383  pkt.size = sizeof(frame);
1384  pkt.pts =
1385  pkt.dts = frame->pts;
1386  pkt.duration = frame->pkt_duration;
1387  pkt.stream_index = stream_index;
1389  }
1390 
1391  return interleaved ? av_interleaved_write_frame(s, pktp) :
1392  av_write_frame(s, pktp);
1393 }
1394 
1395 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
1396  AVFrame *frame)
1397 {
1398  return write_uncoded_frame_internal(s, stream_index, frame, 0);
1399 }
1400 
1402  AVFrame *frame)
1403 {
1404  return write_uncoded_frame_internal(s, stream_index, frame, 1);
1405 }
1406 
1408 {
1409  av_assert0(s->oformat);
1410  if (!s->oformat->write_uncoded_frame)
1411  return AVERROR(ENOSYS);
1412  return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1414 }
int avformat_alloc_output_context2(AVFormatContext **avctx, ff_const59 AVOutputFormat *oformat, const char *format, const char *filename)
Allocate an AVFormatContext for an output format.
Definition: mux.c:135
#define AV_CODEC_PROP_REORDER
Codec supports frame reordering.
Definition: codec_desc.h:92
static float compare(const AVFrame *haystack, const AVFrame *obj, int offx, int offy)
Definition: vf_find_rect.c:104
enum AVChromaLocation chroma_location
Definition: codec_par.h:150
#define NULL
Definition: coverity.c:32
enum AVFieldOrder field_order
Video only.
Definition: codec_par.h:141
AVBSFContext * bsfc
bitstream filter to run on stream
Definition: internal.h:159
int audio_preload
Audio preload in microseconds.
Definition: avformat.h:1599
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static int check_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mux.c:763
enum AVCodecID id
Definition: internal.h:43
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
MPEG-2/4 4:2:0, H.264 default for 4:2:0.
Definition: pixfmt.h:607
This structure describes decoded (raw) audio or video data.
Definition: frame.h:314
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file ensuring correct interleaving.
Definition: mux.c:1255
int bitstream_checked
Whether or not check_bitstream should still be run on each packet.
Definition: internal.h:164
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:100
FFFrac * priv_pts
Definition: internal.h:193
static void flush(AVCodecContext *avctx)
static void uncoded_frame_free(void *unused, uint8_t *data)
Definition: mux.c:1345
int flush_packets
Flush the I/O context after each packet.
Definition: avformat.h:1666
int av_write_frame(AVFormatContext *s, AVPacket *in)
Write a packet to an output media file.
Definition: mux.c:1209
const char * desc
Definition: libsvtav1.c:79
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
int reorder
Set to 1 if the codec allows reordering, so pts can be different from dts.
Definition: internal.h:152
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4899
int(* init)(struct AVFormatContext *)
Initialize format.
Definition: avformat.h:622
#define AVSTREAM_INIT_IN_INIT_OUTPUT
stream parameters initialized in avformat_init_output
Definition: avformat.h:2418
int max_b_frames
maximum number of B-frames between non-B-frames Note: The output will be delayed by max_b_frames+1 re...
Definition: avcodec.h:791
AVRational sample_aspect_ratio
Video only.
Definition: codec_par.h:136
void av_opt_set_defaults(void *s)
Set the values of all AVOption fields to their default values.
Definition: opt.c:1358
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
const struct AVBitStreamFilter * filter
The bitstream filter this context is an instance of.
Definition: bsf.h:58
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:942
int num
Numerator.
Definition: rational.h:59
The bitstream filter state.
Definition: bsf.h:49
int index
stream index in AVFormatContext
Definition: avformat.h:881
static int prepare_input_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)
Definition: mux.c:779
int size
Definition: packet.h:364
int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
Interleave an AVPacket per dts so it can be muxed.
Definition: mux.c:931
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1704
static void deinit_muxer(AVFormatContext *s)
Definition: mux.c:477
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:217
int av_get_output_timestamp(struct AVFormatContext *s, int stream, int64_t *dts, int64_t *wall)
Get timing information for the data currently output.
Definition: mux.c:1315
static int write_uncoded_frame_internal(AVFormatContext *s, int stream_index, AVFrame *frame, int interleaved)
Definition: mux.c:1351
int64_t offset
Offset to remap timestamps to be non-negative.
Definition: internal.h:106
void * priv_data
Definition: avformat.h:895
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
int avoid_negative_ts_use_pts
Definition: internal.h:119
static AVPacket pkt
int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
Test whether a muxer supports uncoded frame.
Definition: mux.c:1407
static void error(const char *err)
int64_t interleaver_chunk_size
Definition: internal.h:233
#define AVFMT_ALLOW_FLUSH
Format allows flushing.
Definition: avformat.h:471
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample format(the sample packing is implied by the sample format) and sample rate.The lists are not just lists
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1547
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
#define AVFMT_TS_NONSTRICT
Format does not require strictly increasing timestamps, but they must still be monotonic.
Definition: avformat.h:472
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt, AVFormatContext *src, int interleave)
Write a packet to another muxer than the one the user originally intended.
Definition: mux.c:1324
static int write_packets_common(AVFormatContext *s, AVPacket *pkt, int interleaved)
Definition: mux.c:1186
int(* interleave_packet)(struct AVFormatContext *, AVPacket *out, AVPacket *in, int flush)
A format-specific function for interleavement.
Definition: avformat.h:568
Trailer data, which doesn&#39;t contain actual content, but only for finalizing the output file...
Definition: avio.h:140
Format I/O context.
Definition: avformat.h:1239
int64_t output_ts_offset
Output timestamp offset, in microseconds.
Definition: avformat.h:1768
int64_t cur_dts
Definition: avformat.h:1073
static void interleave(uint8_t *dst, uint8_t *src, int w, int h, int dst_linesize, int src_linesize, enum FilterMode mode, int swap)
Definition: vf_il.c:114
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
#define CHUNK_START
Definition: mux.c:827
Public dictionary API.
static void flush_if_needed(AVFormatContext *s)
Definition: mux.c:467
int flags
can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER, AVFMT_NOTIMESTAMPS, AVFMT_VARIABLE_FPS, AVFMT_NODIMENSIONS, AVFMT_NOSTREAMS, AVFMT_ALLOW_FLUSH, AVFMT_TS_NONSTRICT, AVFMT_TS_NEGATIVE
Definition: avformat.h:519
uint8_t
Round toward +infinity.
Definition: mathematics.h:83
#define av_malloc(s)
Opaque data information usually continuous.
Definition: avutil.h:203
int width
Video only.
Definition: codec_par.h:126
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:64
AVOptions.
A point in the output bytestream where the underlying AVIOContext might flush the buffer depending on...
Definition: avio.h:146
timestamp utils, mostly useful for debugging/logging purposes
Query whether the feature is possible on this stream.
Definition: internal.h:772
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:220
AVPacket pkt
Definition: packet.h:397
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
#define f(width, name)
Definition: cbs_vp9.c:255
int priv_data_size
size of private data so that it can be allocated in the wrapper
Definition: avformat.h:552
The exact value of the fractional number is: &#39;val + num / den&#39;.
Definition: internal.h:59
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:381
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:407
struct AVPacketList * last_in_packet_buffer
last packet in packet_buffer for this stream when muxing.
Definition: internal.h:345
void avio_write_marker(AVIOContext *s, int64_t time, enum AVIODataMarkerType type)
Mark the written bytestream as a specific type.
Definition: aviobuf.c:483
int64_t mux_ts_offset
Timestamp offset added to timestamps before muxing.
Definition: internal.h:287
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1307
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:211
const char * name
Definition: bsf.h:99
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
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1370
uint8_t * data
Definition: packet.h:363
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
int64_t max_interleave_delta
Maximum buffering duration for interleaving.
Definition: avformat.h:1541
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
Definition: avpacket.c:664
uint32_t tag
Definition: movenc.c:1597
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define max(a, b)
Definition: cuda_runtime.h:33
struct AVPacketList * packet_buffer
This buffer is only needed when packets were already buffered but not decoded, for example to get the...
Definition: internal.h:76
#define AVSTREAM_INIT_IN_WRITE_HEADER
stream parameters initialized in avformat_write_header
Definition: avformat.h:2417
static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
Interleave an AVPacket correctly so it can be muxed.
Definition: mux.c:1084
#define AVFMT_FLAG_BITEXACT
When muxing, try to avoid writing any random/volatile data to the output.
Definition: avformat.h:1387
#define av_log(a,...)
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:401
static int interleave_compare_dts(AVFormatContext *s, const AVPacket *next, const AVPacket *pkt)
Definition: mux.c:901
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:255
#define ff_const59
The ff_const59 define is not part of the public API and will be removed without further warning...
Definition: avformat.h:544
#define AVFMT_FLAG_FLUSH_PACKETS
Flush the AVIOContext every packet.
Definition: avformat.h:1380
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:46
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1479
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:1595
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
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:713
static int write_packet_common(AVFormatContext *s, AVStream *st, AVPacket *pkt, int interleaved)
Definition: mux.c:1130
static int validate_codec_tag(AVFormatContext *s, AVStream *st)
Definition: mux.c:196
static __device__ float fabs(float a)
Definition: cuda_runtime.h:182
#define AV_PKT_FLAG_UNCODED_FRAME
Definition: mux.c:540
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
int(* check_bitstream)(struct AVFormatContext *, const AVPacket *pkt)
Set up any necessary bitstream filtering and extract any extra data needed for the global header...
Definition: avformat.h:637
char * url
input or output URL.
Definition: avformat.h:1335
int video_delay
Video only.
Definition: codec_par.h:155
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:203
#define av_fourcc2str(fourcc)
Definition: avutil.h:348
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: packet.h:346
simple assert() macros that are a bit more flexible than ISO C assert().
int side_data_elems
Definition: packet.h:375
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 ff_is_intra_only(enum AVCodecID id)
Definition: utils.c:986
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:953
#define FFMAX(a, b)
Definition: common.h:94
int av_get_audio_frame_duration2(AVCodecParameters *par, int frame_bytes)
This function is the same as av_get_audio_frame_duration(), except it works with AVCodecParameters in...
Definition: utils.c:1818
int64_t val
Definition: internal.h:60
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
#define fail()
Definition: checkasm.h:123
static void guess_pkt_duration(AVFormatContext *s, AVStream *st, AVPacket *pkt)
Definition: mux.c:641
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:369
int av_compare_ts(int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b)
Compare two timestamps each in its own time base.
Definition: mathematics.c:147
int props
Codec properties, a combination of AV_CODEC_PROP_* flags.
Definition: codec_desc.h:54
static int write_packet(AVFormatContext *s, AVPacket *pkt)
Shift timestamps and call muxer; the original pts/dts are not kept.
Definition: mux.c:680
int streams_initialized
Whether or not avformat_init_output fully initialized streams.
Definition: internal.h:134
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: internal.h:228
common internal API header
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1295
#define LIBAVFORMAT_IDENT
Definition: version.h:46
int block_align
Audio only.
Definition: codec_par.h:177
int av_packet_copy_props(AVPacket *dst, const AVPacket *src)
Copy only "properties" fields from src to dst.
Definition: avpacket.c:572
This is any, unlabelled data.
Definition: avio.h:135
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:333
int(* write_header)(struct AVFormatContext *)
Definition: avformat.h:554
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
int64_t shortest_end
Timestamp of the end of the shortest stream.
Definition: internal.h:124
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
int avformat_write_header(AVFormatContext *s, AVDictionary **options)
Allocate the stream private data and write the stream header to an output media file.
Definition: mux.c:505
int(* write_uncoded_frame)(struct AVFormatContext *, int stream_index, AVFrame **frame, unsigned flags)
Write an uncoded AVFrame.
Definition: avformat.h:595
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:560
AVRational time_base_out
The timebase used for the timestamps of the output packets.
Definition: bsf.h:95
int av_packet_make_refcounted(AVPacket *pkt)
Ensure the data described by a given packet is reference counted.
Definition: avpacket.c:672
ITU-R 601, SMPTE 274M 296M S314M(DV 4:1:1), mpeg2 4:2:2.
Definition: pixfmt.h:609
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: error.h:119
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
#define s(width, name)
Definition: cbs_vp9.c:257
int avoid_negative_ts
Avoid negative timestamps during muxing.
Definition: avformat.h:1582
static void frac_init(FFFrac *f, int64_t val, int64_t num, int64_t den)
f = val + (num / den) + 0.5.
Definition: mux.c:51
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:1671
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:200
static int init_muxer(AVFormatContext *s, AVDictionary **options)
Definition: mux.c:230
Opaque data information usually sparse.
Definition: avutil.h:205
int64_t num
Definition: internal.h:60
const AVClass * priv_class
AVClass for the private context.
Definition: avformat.h:528
int avformat_init_output(AVFormatContext *s, AVDictionary **options)
Allocate the stream private data and initialize the codec, but do not write the header.
Definition: mux.c:485
int av_opt_set_dict2(void *obj, AVDictionary **options, int search_flags)
Set all the options from a given dictionary on an object.
Definition: opt.c:1631
preferred ID for MPEG-1/2 video decoding
Definition: codec_id.h:51
#define AV_DISPOSITION_ATTACHED_PIC
The stream is stored in the file as an attached picture/"cover art" (e.g.
Definition: avformat.h:848
ff_const59 struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1258
if(ret)
static void comp(unsigned char *dst, ptrdiff_t dst_stride, unsigned char *src, ptrdiff_t src_stride, int add)
Definition: eamad.c:85
Stream structure.
Definition: avformat.h:880
#define AVFMT_NOTIMESTAMPS
Format does not need / have any timestamps.
Definition: avformat.h:462
int ff_interleaved_peek(AVFormatContext *s, int stream, AVPacket *pkt, int add_offset)
Find the next packet in the interleaving queue for the given stream.
Definition: mux.c:1049
#define FF_FDEBUG_TS
Definition: avformat.h:1523
int frame_size
Definition: mxfenc.c:2165
int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
Submit a packet for filtering.
Definition: bsf.c:200
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:253
static int write_packets_from_bsfs(AVFormatContext *s, AVStream *st, AVPacket *pkt, int interleaved)
Definition: mux.c:1154
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1119
int64_t pkt_duration
duration of the corresponding packet, expressed in AVStream->time_base units, 0 if unknown...
Definition: frame.h:593
int debug
Flags to enable debugging.
Definition: avformat.h:1522
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
int av_opt_set_dict(void *obj, AVDictionary **options)
Set all the options from a given dictionary on an object.
Definition: opt.c:1656
AVIOContext * pb
I/O context.
Definition: avformat.h:1281
const struct AVCodecTag *const * codec_tag
List of supported codec_id-codec_tag pairs, ordered by "better choice first".
Definition: avformat.h:525
int64_t den
Definition: internal.h:60
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:606
int av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt)
Retrieve a filtered packet.
Definition: bsf.c:226
int(* write_trailer)(struct AVFormatContext *)
Definition: avformat.h:563
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
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31))))#define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac){}void ff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map){AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);return NULL;}return ac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;}int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){int use_generic=1;int len=in->nb_samples;int p;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
int nb_interleaved_streams
Number of streams relevant for interleaving.
Definition: internal.h:69
Describe the class of an AVClass context structure.
Definition: log.h:67
int initialized
Whether or not avformat_init_output has already been called.
Definition: internal.h:129
#define FF_COMPLIANCE_NORMAL
Definition: avcodec.h:1597
unsigned int avpriv_toupper4(unsigned int x)
Definition: utils.c:1885
ff_const59 AVOutputFormat * av_guess_format(const char *short_name, const char *filename, const char *mime_type)
Return the output format in the list of registered output formats which best matches the provided par...
Definition: format.c:51
int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt, int(*compare)(AVFormatContext *, const AVPacket *, const AVPacket *))
Add packet to an AVFormatContext&#39;s packet_buffer list, determining its interleaved position using com...
Definition: mux.c:829
Rational number (pair of numerator and denominator).
Definition: rational.h:58
#define AV_DISPOSITION_TIMED_THUMBNAILS
The stream is sparse, and contains thumbnail images, often corresponding to chapter markers...
Definition: avformat.h:853
int avcodec_parameters_from_context(AVCodecParameters *par, const AVCodecContext *codec)
Fill the parameters struct based on the values from the supplied codec context.
Definition: utils.c:2112
void(* get_output_timestamp)(struct AVFormatContext *s, int stream, int64_t *dts, int64_t *wall)
Definition: avformat.h:579
void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:245
enum AVChromaLocation ff_choose_chroma_location(AVFormatContext *s, AVStream *st)
Chooses a timebase for muxing the specified stream.
Definition: mux.c:105
AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision)
Chooses a timebase for muxing the specified stream.
Definition: mux.c:89
#define AVFMT_AVOID_NEG_TS_AUTO
Enabled when required by target format.
Definition: avformat.h:1583
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4409
#define AVFMT_FLAG_AUTO_BSF
Add bitstream filters as requested by the muxer.
Definition: avformat.h:1398
int error
contains the error code or 0 if no error happened
Definition: avio.h:245
int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
Return audio frame duration.
Definition: utils.c:1809
This struct describes the properties of a single codec described by an AVCodecID. ...
Definition: codec_desc.h:38
unsigned int tag
Definition: internal.h:44
AVRational offset_timebase
Timebase for the timestamp offset.
Definition: internal.h:111
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
int sample_rate
Audio only.
Definition: codec_par.h:170
#define AVFMT_AVOID_NEG_TS_MAKE_ZERO
Shift timestamps so that they start at 0.
Definition: avformat.h:1585
static int av_cmp_q(AVRational a, AVRational b)
Compare two rationals.
Definition: rational.h:89
Main libavformat public API header.
AVPacketSideData * side_data
Additional packet data that can be provided by the container.
Definition: packet.h:374
int64_t pts_buffer[MAX_REORDER_DELAY+1]
Definition: internal.h:319
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1611
const OptionDef options[]
Definition: ffmpeg_opt.c:3407
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:83
int av_interleaved_write_uncoded_frame(AVFormatContext *s, int stream_index, AVFrame *frame)
Write an uncoded frame to an output media file.
Definition: mux.c:1401
common internal api header.
struct AVPacketList * next
Definition: packet.h:398
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:458
#define AVFMT_NOSTREAMS
Format does not require any streams.
Definition: avformat.h:467
int max_chunk_size
Max chunk size in bytes Note, not all formats support this and unpredictable things may happen if it ...
Definition: avformat.h:1615
int error_recognition
Error recognition; higher values will detect more errors but may misdetect some more or less valid pa...
Definition: avformat.h:1506
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:933
AVBufferRef * av_buffer_ref(AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:93
static void frac_add(FFFrac *f, int64_t incr)
Fractional addition to f: f = f + (incr / f->den).
Definition: mux.c:69
static int init_pts(AVFormatContext *s)
Definition: mux.c:422
int64_t interleaver_chunk_duration
Definition: internal.h:234
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:35
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:931
char * key
Definition: dict.h:86
int den
Denominator.
Definition: rational.h:60
int av_write_uncoded_frame(AVFormatContext *s, int stream_index, AVFrame *frame)
Write an uncoded frame to an output media file.
Definition: mux.c:1395
#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
static int interleaved_write_packet(AVFormatContext *s, AVPacket *pkt, int flush)
Definition: mux.c:1111
#define AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE
Shift timestamps so they are non negative.
Definition: avformat.h:1584
struct AVPacketList * packet_buffer_end
Definition: internal.h:77
#define av_free(p)
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:84
#define av_ts2str(ts)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:54
int max_chunk_duration
Max chunk time in microseconds.
Definition: avformat.h:1607
void * priv_data
Format private data.
Definition: avformat.h:1267
void(* deinit)(struct AVFormatContext *)
Deinitialize format.
Definition: avformat.h:631
#define AVFMT_NODIMENSIONS
Format does not need width/height.
Definition: avformat.h:466
static int check_bitstream(AVFormatContext *s, AVStream *st, AVPacket *pkt)
Definition: mux.c:1092
const AVCodecDescriptor * avcodec_descriptor_get(enum AVCodecID id)
Definition: codec_desc.c:3480
int(* write_packet)(struct AVFormatContext *, AVPacket *pkt)
Write a packet.
Definition: avformat.h:562
int channels
Audio only.
Definition: codec_par.h:166
AVCodecContext * avctx
The codec context used by avformat_find_stream_info, the parser, etc.
Definition: internal.h:169
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: packet.h:362
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:1270
FILE * out
Definition: movenc.c:54
#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
AVChromaLocation
Location of chroma samples.
Definition: pixfmt.h:605
MPEG-1 4:2:0, JPEG 4:2:0, H.263 4:2:0.
Definition: pixfmt.h:608
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1045
int64_t av_rescale_q_rnd(int64_t a, AVRational bq, AVRational cq, enum AVRounding rnd)
Rescale a 64-bit integer by 2 rational numbers with specified rounding.
Definition: mathematics.c:134
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
#define FFSWAP(type, a, b)
Definition: common.h:99
int stream_index
Definition: packet.h:365
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:909
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
#define MKTAG(a, b, c, d)
Definition: common.h:405
unsigned int av_codec_get_tag(const struct AVCodecTag *const *tags, enum AVCodecID id)
Get the codec tag for the given codec id id.
#define AVFMT_TS_NEGATIVE
Format allows muxing negative timestamps.
Definition: avformat.h:477
static double val(void *priv, double ch)
Definition: aeval.c:76
This structure stores compressed data.
Definition: packet.h:340
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:356
Header data; this needs to be present for the stream to be decodeable.
Definition: avio.h:115
int i
Definition: input.c:407
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define AVFMT_FLAG_SHORTEST
Stop muxing when the shortest stream stops.
Definition: avformat.h:1397
static uint8_t tmp[11]
Definition: aes_ctr.c:27