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 num, den, 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->duration < 0 && st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE) {
568  av_log(s, AV_LOG_WARNING, "Packet with invalid duration %"PRId64" in stream %d\n",
569  pkt->duration, pkt->stream_index);
570  pkt->duration = 0;
571  }
572 
573  /* duration field */
574  if (pkt->duration == 0) {
575  ff_compute_frame_duration(s, &num, &den, st, NULL, pkt);
576  if (den && num) {
577  pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
578  }
579  }
580 
581  if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
582  pkt->pts = pkt->dts;
583 
584  //XXX/FIXME this is a temporary hack until all encoders output pts
585  if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
586  static int warned;
587  if (!warned) {
588  av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
589  warned = 1;
590  }
591  pkt->dts =
592 // pkt->pts= st->cur_dts;
593  pkt->pts = st->internal->priv_pts->val;
594  }
595 
596  //calculate dts from pts
597  if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
598  st->pts_buffer[0] = pkt->pts;
599  for (i = 1; i < delay + 1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
600  st->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
601  for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
602  FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
603 
604  pkt->dts = st->pts_buffer[0];
605  }
606 
607  if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
608  ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
611  st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
612  av_log(s, AV_LOG_ERROR,
613  "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
614  st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
615  return AVERROR(EINVAL);
616  }
617  if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
618  av_log(s, AV_LOG_ERROR,
619  "pts (%s) < dts (%s) in stream %d\n",
620  av_ts2str(pkt->pts), av_ts2str(pkt->dts),
621  st->index);
622  return AVERROR(EINVAL);
623  }
624 
625  if (s->debug & FF_FDEBUG_TS)
626  av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%s dts2:%s\n",
627  av_ts2str(pkt->pts), av_ts2str(pkt->dts));
628 
629  st->cur_dts = pkt->dts;
630  st->internal->priv_pts->val = pkt->dts;
631 
632  /* update pts */
633  switch (st->codecpar->codec_type) {
634  case AVMEDIA_TYPE_AUDIO:
635  frame_size = (pkt->flags & AV_PKT_FLAG_UNCODED_FRAME) ?
636  (*(AVFrame **)pkt->data)->nb_samples :
637  av_get_audio_frame_duration(st->codec, pkt->size);
638 
639  /* HACK/FIXME, we skip the initial 0 size packets as they are most
640  * likely equal to the encoder delay, but it would be better if we
641  * had the real timestamps from the encoder */
642  if (frame_size >= 0 && (pkt->size || st->internal->priv_pts->num != st->internal->priv_pts->den >> 1 || st->internal->priv_pts->val)) {
643  frac_add(st->internal->priv_pts, (int64_t)st->time_base.den * frame_size);
644  }
645  break;
646  case AVMEDIA_TYPE_VIDEO:
647  frac_add(st->internal->priv_pts, (int64_t)st->time_base.den * st->time_base.num);
648  break;
649  }
650  return 0;
651 }
653 #endif
654 
655 /**
656  * Shift timestamps and call muxer; the original pts/dts are not kept.
657  *
658  * FIXME: this function should NEVER get undefined pts/dts beside when the
659  * AVFMT_NOTIMESTAMPS is set.
660  * Those additional safety checks should be dropped once the correct checks
661  * are set in the callers.
662  */
664 {
665  int ret;
666 
667  // If the timestamp offsetting below is adjusted, adjust
668  // ff_interleaved_peek similarly.
669  if (s->output_ts_offset) {
670  AVStream *st = s->streams[pkt->stream_index];
672 
673  if (pkt->dts != AV_NOPTS_VALUE)
674  pkt->dts += offset;
675  if (pkt->pts != AV_NOPTS_VALUE)
676  pkt->pts += offset;
677  }
678 
679  if (s->avoid_negative_ts > 0) {
680  AVStream *st = s->streams[pkt->stream_index];
681  int64_t offset = st->mux_ts_offset;
682  int64_t ts = s->internal->avoid_negative_ts_use_pts ? pkt->pts : pkt->dts;
683 
684  if (s->internal->offset == AV_NOPTS_VALUE && ts != AV_NOPTS_VALUE &&
685  (ts < 0 || s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO)) {
686  s->internal->offset = -ts;
688  }
689 
690  if (s->internal->offset != AV_NOPTS_VALUE && !offset) {
691  offset = st->mux_ts_offset =
694  st->time_base,
695  AV_ROUND_UP);
696  }
697 
698  if (pkt->dts != AV_NOPTS_VALUE)
699  pkt->dts += offset;
700  if (pkt->pts != AV_NOPTS_VALUE)
701  pkt->pts += offset;
702 
704  if (pkt->pts != AV_NOPTS_VALUE && pkt->pts < 0) {
705  av_log(s, AV_LOG_WARNING, "failed to avoid negative "
706  "pts %s in stream %d.\n"
707  "Try -avoid_negative_ts 1 as a possible workaround.\n",
708  av_ts2str(pkt->pts),
709  pkt->stream_index
710  );
711  }
712  } else {
713  av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0 || s->max_interleave_delta > 0);
714  if (pkt->dts != AV_NOPTS_VALUE && pkt->dts < 0) {
716  "Packets poorly interleaved, failed to avoid negative "
717  "timestamp %s in stream %d.\n"
718  "Try -max_interleave_delta 0 as a possible workaround.\n",
719  av_ts2str(pkt->dts),
720  pkt->stream_index
721  );
722  }
723  }
724  }
725 
726  if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
727  AVFrame **frame = (AVFrame **)pkt->data;
728  av_assert0(pkt->size == sizeof(*frame));
729  ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, frame, 0);
730  } else {
731  ret = s->oformat->write_packet(s, pkt);
732  }
733 
734  if (s->pb && ret >= 0) {
735  flush_if_needed(s);
736  if (s->pb->error < 0)
737  ret = s->pb->error;
738  }
739 
740  if (ret >= 0)
741  s->streams[pkt->stream_index]->nb_frames++;
742 
743  return ret;
744 }
745 
747 {
748  if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
749  av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
750  pkt->stream_index);
751  return AVERROR(EINVAL);
752  }
753 
755  av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
756  return AVERROR(EINVAL);
757  }
758 
759  return 0;
760 }
761 
763 {
764 #if !FF_API_COMPUTE_PKT_FIELDS2 || !FF_API_LAVF_AVCTX
765  /* sanitize the timestamps */
766  if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
767 
768  /* when there is no reordering (so dts is equal to pts), but
769  * only one of them is set, set the other as well */
770  if (!st->internal->reorder) {
771  if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE)
772  pkt->pts = pkt->dts;
773  if (pkt->dts == AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE)
774  pkt->dts = pkt->pts;
775  }
776 
777  /* check that the timestamps are set */
778  if (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE) {
779  av_log(s, AV_LOG_ERROR,
780  "Timestamps are unset in a packet for stream %d\n", st->index);
781  return AVERROR(EINVAL);
782  }
783 
784  /* check that the dts are increasing (or at least non-decreasing,
785  * if the format allows it */
786  if (st->cur_dts != AV_NOPTS_VALUE &&
787  ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && st->cur_dts >= pkt->dts) ||
788  st->cur_dts > pkt->dts)) {
789  av_log(s, AV_LOG_ERROR,
790  "Application provided invalid, non monotonically increasing "
791  "dts to muxer in stream %d: %" PRId64 " >= %" PRId64 "\n",
792  st->index, st->cur_dts, pkt->dts);
793  return AVERROR(EINVAL);
794  }
795 
796  if (pkt->pts < pkt->dts) {
797  av_log(s, AV_LOG_ERROR, "pts %" PRId64 " < dts %" PRId64 " in stream %d\n",
798  pkt->pts, pkt->dts, st->index);
799  return AVERROR(EINVAL);
800  }
801  }
802 #endif
803  /* update flags */
804  if (st->internal->is_intra_only)
805  pkt->flags |= AV_PKT_FLAG_KEY;
806 
807  return 0;
808 }
809 
810 #define CHUNK_START 0x1000
811 
813  int (*compare)(AVFormatContext *, const AVPacket *, const AVPacket *))
814 {
815  int ret;
816  AVPacketList **next_point, *this_pktl;
817  AVStream *st = s->streams[pkt->stream_index];
818  int chunked = s->max_chunk_size || s->max_chunk_duration;
819 
820  this_pktl = av_malloc(sizeof(AVPacketList));
821  if (!this_pktl) {
822  av_packet_unref(pkt);
823  return AVERROR(ENOMEM);
824  }
825  if ((ret = av_packet_make_refcounted(pkt)) < 0) {
826  av_free(this_pktl);
827  av_packet_unref(pkt);
828  return ret;
829  }
830 
831  av_packet_move_ref(&this_pktl->pkt, pkt);
832  pkt = &this_pktl->pkt;
833 
834  if (st->last_in_packet_buffer) {
835  next_point = &(st->last_in_packet_buffer->next);
836  } else {
837  next_point = &s->internal->packet_buffer;
838  }
839 
840  if (chunked) {
842  st->interleaver_chunk_size += pkt->size;
845  || (max && st->interleaver_chunk_duration > max)) {
846  st->interleaver_chunk_size = 0;
847  pkt->flags |= CHUNK_START;
848  if (max && st->interleaver_chunk_duration > max) {
849  int64_t syncoffset = (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
850  int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
851 
852  st->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
853  } else
855  }
856  }
857  if (*next_point) {
858  if (chunked && !(pkt->flags & CHUNK_START))
859  goto next_non_null;
860 
861  if (compare(s, &s->internal->packet_buffer_end->pkt, pkt)) {
862  while ( *next_point
863  && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
864  || !compare(s, &(*next_point)->pkt, pkt)))
865  next_point = &(*next_point)->next;
866  if (*next_point)
867  goto next_non_null;
868  } else {
869  next_point = &(s->internal->packet_buffer_end->next);
870  }
871  }
872  av_assert1(!*next_point);
873 
874  s->internal->packet_buffer_end = this_pktl;
875 next_non_null:
876 
877  this_pktl->next = *next_point;
878 
879  st->last_in_packet_buffer = *next_point = this_pktl;
880 
881  return 0;
882 }
883 
885  const AVPacket *pkt)
886 {
887  AVStream *st = s->streams[pkt->stream_index];
888  AVStream *st2 = s->streams[next->stream_index];
889  int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
890  st->time_base);
891  if (s->audio_preload) {
892  int preload = st ->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
893  int preload2 = st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
894  if (preload != preload2) {
895  int64_t ts, ts2;
896  preload *= s->audio_preload;
897  preload2 *= s->audio_preload;
898  ts = av_rescale_q(pkt ->dts, st ->time_base, AV_TIME_BASE_Q) - preload;
899  ts2= av_rescale_q(next->dts, st2->time_base, AV_TIME_BASE_Q) - preload2;
900  if (ts == ts2) {
901  ts = ((uint64_t)pkt ->dts*st ->time_base.num*AV_TIME_BASE - (uint64_t)preload *st ->time_base.den)*st2->time_base.den
902  - ((uint64_t)next->dts*st2->time_base.num*AV_TIME_BASE - (uint64_t)preload2*st2->time_base.den)*st ->time_base.den;
903  ts2 = 0;
904  }
905  comp = (ts2 > ts) - (ts2 < ts);
906  }
907  }
908 
909  if (comp == 0)
910  return pkt->stream_index < next->stream_index;
911  return comp > 0;
912 }
913 
915  AVPacket *pkt, int flush)
916 {
917  AVPacketList *pktl;
918  int stream_count = 0;
919  int noninterleaved_count = 0;
920  int i, ret;
921  int eof = flush;
922 
923  if (pkt) {
924  if ((ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts)) < 0)
925  return ret;
926  }
927 
928  for (i = 0; i < s->nb_streams; i++) {
929  if (s->streams[i]->last_in_packet_buffer) {
930  ++stream_count;
931  } else if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
934  ++noninterleaved_count;
935  }
936  }
937 
938  if (s->internal->nb_interleaved_streams == stream_count)
939  flush = 1;
940 
941  if (s->max_interleave_delta > 0 &&
942  s->internal->packet_buffer &&
943  !flush &&
944  s->internal->nb_interleaved_streams == stream_count+noninterleaved_count
945  ) {
946  AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
947  int64_t delta_dts = INT64_MIN;
948  int64_t top_dts = av_rescale_q(top_pkt->dts,
949  s->streams[top_pkt->stream_index]->time_base,
951 
952  for (i = 0; i < s->nb_streams; i++) {
953  int64_t last_dts;
954  const AVPacketList *last = s->streams[i]->last_in_packet_buffer;
955 
956  if (!last)
957  continue;
958 
959  last_dts = av_rescale_q(last->pkt.dts,
960  s->streams[i]->time_base,
962  delta_dts = FFMAX(delta_dts, last_dts - top_dts);
963  }
964 
965  if (delta_dts > s->max_interleave_delta) {
966  av_log(s, AV_LOG_DEBUG,
967  "Delay between the first packet and last packet in the "
968  "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
969  delta_dts, s->max_interleave_delta);
970  flush = 1;
971  }
972  }
973 
974  if (s->internal->packet_buffer &&
975  eof &&
976  (s->flags & AVFMT_FLAG_SHORTEST) &&
978  AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
979 
980  s->internal->shortest_end = av_rescale_q(top_pkt->dts,
981  s->streams[top_pkt->stream_index]->time_base,
983  }
984 
985  if (s->internal->shortest_end != AV_NOPTS_VALUE) {
986  while (s->internal->packet_buffer) {
987  AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
988  AVStream *st;
989  int64_t top_dts = av_rescale_q(top_pkt->dts,
990  s->streams[top_pkt->stream_index]->time_base,
992 
993  if (s->internal->shortest_end + 1 >= top_dts)
994  break;
995 
996  pktl = s->internal->packet_buffer;
997  st = s->streams[pktl->pkt.stream_index];
998 
999  s->internal->packet_buffer = pktl->next;
1000  if (!s->internal->packet_buffer)
1002 
1003  if (st->last_in_packet_buffer == pktl)
1005 
1006  av_packet_unref(&pktl->pkt);
1007  av_freep(&pktl);
1008  flush = 0;
1009  }
1010  }
1011 
1012  if (stream_count && flush) {
1013  AVStream *st;
1014  pktl = s->internal->packet_buffer;
1015  *out = pktl->pkt;
1016  st = s->streams[out->stream_index];
1017 
1018  s->internal->packet_buffer = pktl->next;
1019  if (!s->internal->packet_buffer)
1021 
1022  if (st->last_in_packet_buffer == pktl)
1024  av_freep(&pktl);
1025 
1026  return 1;
1027  } else {
1028  return 0;
1029  }
1030 }
1031 
1033  AVPacket *pkt, int add_offset)
1034 {
1035  AVPacketList *pktl = s->internal->packet_buffer;
1036  while (pktl) {
1037  if (pktl->pkt.stream_index == stream) {
1038  *pkt = pktl->pkt;
1039  if (add_offset) {
1040  AVStream *st = s->streams[pkt->stream_index];
1041  int64_t offset = st->mux_ts_offset;
1042 
1043  if (s->output_ts_offset)
1045 
1046  if (pkt->dts != AV_NOPTS_VALUE)
1047  pkt->dts += offset;
1048  if (pkt->pts != AV_NOPTS_VALUE)
1049  pkt->pts += offset;
1050  }
1051  return 0;
1052  }
1053  pktl = pktl->next;
1054  }
1055  return AVERROR(ENOENT);
1056 }
1057 
1058 /**
1059  * Interleave an AVPacket correctly so it can be muxed.
1060  * @param out the interleaved packet will be output here
1061  * @param in the input packet; will always be blank on return if not NULL
1062  * @param flush 1 if no further packets are available as input and all
1063  * remaining packets should be output
1064  * @return 1 if a packet was output, 0 if no packet could be output,
1065  * < 0 if an error occurred
1066  */
1068 {
1069  if (s->oformat->interleave_packet) {
1070  return s->oformat->interleave_packet(s, out, in, flush);
1071  } else
1072  return ff_interleave_packet_per_dts(s, out, in, flush);
1073 }
1074 
1076 {
1077  int ret;
1078 
1079  if (!(s->flags & AVFMT_FLAG_AUTO_BSF))
1080  return 1;
1081 
1082  if (s->oformat->check_bitstream) {
1083  if (!st->internal->bitstream_checked) {
1084  if ((ret = s->oformat->check_bitstream(s, pkt)) < 0)
1085  return ret;
1086  else if (ret == 1)
1087  st->internal->bitstream_checked = 1;
1088  }
1089  }
1090 
1091  return 1;
1092 }
1093 
1095 {
1096  for (;; ) {
1097  AVPacket opkt;
1098  int ret = interleave_packet(s, &opkt, pkt, flush);
1099  if (ret <= 0)
1100  return ret;
1101 
1102  pkt = NULL;
1103 
1104  ret = write_packet(s, &opkt);
1105 
1106  av_packet_unref(&opkt);
1107 
1108  if (ret < 0)
1109  return ret;
1110  }
1111 }
1112 
1113 static int write_packet_common(AVFormatContext *s, AVStream *st, AVPacket *pkt, int interleaved)
1114 {
1115  int ret;
1116 
1117  if (s->debug & FF_FDEBUG_TS)
1118  av_log(s, AV_LOG_DEBUG, "%s size:%d dts:%s pts:%s\n", __FUNCTION__,
1119  pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
1120 
1121 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
1122  if ((ret = compute_muxer_pkt_fields(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1123  return ret;
1124 #endif
1125 
1126  if (interleaved) {
1127  if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1128  return AVERROR(EINVAL);
1129  return interleaved_write_packet(s, pkt, 0);
1130  } else {
1131  return write_packet(s, pkt);
1132  }
1133 }
1134 
1135 static int write_packets_from_bsfs(AVFormatContext *s, AVStream *st, AVPacket *pkt, int interleaved)
1136 {
1137  AVBSFContext *bsfc = st->internal->bsfc;
1138  int ret;
1139 
1140  if ((ret = av_bsf_send_packet(bsfc, pkt)) < 0) {
1141  av_log(s, AV_LOG_ERROR,
1142  "Failed to send packet to filter %s for stream %d\n",
1143  bsfc->filter->name, st->index);
1144  return ret;
1145  }
1146 
1147  do {
1148  ret = av_bsf_receive_packet(bsfc, pkt);
1149  if (ret < 0) {
1150  if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
1151  return 0;
1152  av_log(s, AV_LOG_ERROR, "Error applying bitstream filters to an output "
1153  "packet for stream #%d: %s\n", st->index, av_err2str(ret));
1154  if (!(s->error_recognition & AV_EF_EXPLODE) && ret != AVERROR(ENOMEM))
1155  continue;
1156  return ret;
1157  }
1158  av_packet_rescale_ts(pkt, bsfc->time_base_out, st->time_base);
1159  ret = write_packet_common(s, st, pkt, interleaved);
1160  if (ret >= 0 && !interleaved) // a successful write_packet_common already unrefed pkt for interleaved
1161  av_packet_unref(pkt);
1162  } while (ret >= 0);
1163 
1164  return ret;
1165 }
1166 
1167 static int write_packets_common(AVFormatContext *s, AVPacket *pkt, int interleaved)
1168 {
1169  AVStream *st;
1170  int ret = check_packet(s, pkt);
1171  if (ret < 0)
1172  return ret;
1173  st = s->streams[pkt->stream_index];
1174 
1175  ret = prepare_input_packet(s, st, pkt);
1176  if (ret < 0)
1177  return ret;
1178 
1179  ret = check_bitstream(s, st, pkt);
1180  if (ret < 0)
1181  return ret;
1182 
1183  if (st->internal->bsfc) {
1184  return write_packets_from_bsfs(s, st, pkt, interleaved);
1185  } else {
1186  return write_packet_common(s, st, pkt, interleaved);
1187  }
1188 }
1189 
1191 {
1192  AVPacket local_pkt, *pkt = &local_pkt;
1193  int ret;
1194 
1195  if (!in) {
1196  if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
1197  ret = s->oformat->write_packet(s, NULL);
1198  flush_if_needed(s);
1199  if (ret >= 0 && s->pb && s->pb->error < 0)
1200  ret = s->pb->error;
1201  return ret;
1202  }
1203  return 1;
1204  }
1205 
1206  if (in->flags & AV_PKT_FLAG_UNCODED_FRAME) {
1207  pkt = in;
1208  } else {
1209  /* We don't own in, so we have to make sure not to modify it.
1210  * The following avoids copying in's data unnecessarily.
1211  * Copying side data is unavoidable as a bitstream filter
1212  * may change it, e.g. free it on errors. */
1213  pkt->buf = NULL;
1214  pkt->data = in->data;
1215  pkt->size = in->size;
1216  ret = av_packet_copy_props(pkt, in);
1217  if (ret < 0)
1218  return ret;
1219  if (in->buf) {
1220  pkt->buf = av_buffer_ref(in->buf);
1221  if (!pkt->buf) {
1222  ret = AVERROR(ENOMEM);
1223  goto fail;
1224  }
1225  }
1226  }
1227 
1228  ret = write_packets_common(s, pkt, 0/*non-interleaved*/);
1229 
1230 fail:
1231  // Uncoded frames using the noninterleaved codepath are also freed here
1232  av_packet_unref(pkt);
1233  return ret;
1234 }
1235 
1237 {
1238  int ret;
1239 
1240  if (pkt) {
1241  ret = write_packets_common(s, pkt, 1/*interleaved*/);
1242  if (ret < 0)
1243  av_packet_unref(pkt);
1244  return ret;
1245  } else {
1246  av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame FLUSH\n");
1247  return interleaved_write_packet(s, NULL, 1/*flush*/);
1248  }
1249 }
1250 
1252 {
1253  int i, ret1, ret = 0;
1254  AVPacket pkt = {0};
1255  av_init_packet(&pkt);
1256 
1257  for (i = 0; i < s->nb_streams; i++) {
1258  if (s->streams[i]->internal->bsfc) {
1259  ret1 = write_packets_from_bsfs(s, s->streams[i], &pkt, 1/*interleaved*/);
1260  if (ret1 < 0)
1261  av_packet_unref(&pkt);
1262  if (ret >= 0)
1263  ret = ret1;
1264  }
1265  }
1266  ret1 = interleaved_write_packet(s, NULL, 1);
1267  if (ret >= 0)
1268  ret = ret1;
1269 
1270  if (s->oformat->write_trailer) {
1271  if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1273  if (ret >= 0) {
1274  ret = s->oformat->write_trailer(s);
1275  } else {
1276  s->oformat->write_trailer(s);
1277  }
1278  }
1279 
1280  deinit_muxer(s);
1281 
1282  if (s->pb)
1283  avio_flush(s->pb);
1284  if (ret == 0)
1285  ret = s->pb ? s->pb->error : 0;
1286  for (i = 0; i < s->nb_streams; i++) {
1287  av_freep(&s->streams[i]->priv_data);
1288  av_freep(&s->streams[i]->index_entries);
1289  }
1290  if (s->oformat->priv_class)
1291  av_opt_free(s->priv_data);
1292  av_freep(&s->priv_data);
1293  return ret;
1294 }
1295 
1296 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
1297  int64_t *dts, int64_t *wall)
1298 {
1299  if (!s->oformat || !s->oformat->get_output_timestamp)
1300  return AVERROR(ENOSYS);
1301  s->oformat->get_output_timestamp(s, stream, dts, wall);
1302  return 0;
1303 }
1304 
1305 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
1307 {
1308  AVPacket local_pkt;
1309  int ret;
1310 
1311  local_pkt = *pkt;
1312  local_pkt.stream_index = dst_stream;
1313 
1314  av_packet_rescale_ts(&local_pkt,
1315  src->streams[pkt->stream_index]->time_base,
1316  dst->streams[dst_stream]->time_base);
1317 
1318  if (interleave) ret = av_interleaved_write_frame(dst, &local_pkt);
1319  else ret = av_write_frame(dst, &local_pkt);
1320  pkt->buf = local_pkt.buf;
1321  pkt->side_data = local_pkt.side_data;
1322  pkt->side_data_elems = local_pkt.side_data_elems;
1323  return ret;
1324 }
1325 
1326 static void uncoded_frame_free(void *unused, uint8_t *data)
1327 {
1328  av_frame_free((AVFrame **)data);
1329  av_free(data);
1330 }
1331 
1332 static int write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
1333  AVFrame *frame, int interleaved)
1334 {
1335  AVPacket pkt, *pktp;
1336 
1337  av_assert0(s->oformat);
1338  if (!s->oformat->write_uncoded_frame) {
1339  av_frame_free(&frame);
1340  return AVERROR(ENOSYS);
1341  }
1342 
1343  if (!frame) {
1344  pktp = NULL;
1345  } else {
1346  size_t bufsize = sizeof(frame) + AV_INPUT_BUFFER_PADDING_SIZE;
1347  AVFrame **framep = av_mallocz(bufsize);
1348 
1349  if (!framep)
1350  goto fail;
1351  pktp = &pkt;
1352  av_init_packet(&pkt);
1353  pkt.buf = av_buffer_create((void *)framep, bufsize,
1354  uncoded_frame_free, NULL, 0);
1355  if (!pkt.buf) {
1356  av_free(framep);
1357  fail:
1358  av_frame_free(&frame);
1359  return AVERROR(ENOMEM);
1360  }
1361  *framep = frame;
1362 
1363  pkt.data = (void *)framep;
1364  pkt.size = sizeof(frame);
1365  pkt.pts =
1366  pkt.dts = frame->pts;
1367  pkt.duration = frame->pkt_duration;
1368  pkt.stream_index = stream_index;
1370  }
1371 
1372  return interleaved ? av_interleaved_write_frame(s, pktp) :
1373  av_write_frame(s, pktp);
1374 }
1375 
1376 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
1377  AVFrame *frame)
1378 {
1379  return write_uncoded_frame_internal(s, stream_index, frame, 0);
1380 }
1381 
1383  AVFrame *frame)
1384 {
1385  return write_uncoded_frame_internal(s, stream_index, frame, 1);
1386 }
1387 
1389 {
1390  av_assert0(s->oformat);
1391  if (!s->oformat->write_uncoded_frame)
1392  return AVERROR(ENOSYS);
1393  return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1395 }
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
int64_t interleaver_chunk_size
Definition: avformat.h:1124
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:1699
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static int check_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mux.c:746
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:559
This structure describes decoded (raw) audio or video data.
Definition: frame.h:308
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file ensuring correct interleaving.
Definition: mux.c:1236
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:1326
int flush_packets
Flush the I/O context after each packet.
Definition: avformat.h:1766
int av_write_frame(AVFormatContext *s, AVPacket *in)
Write a packet to an output media file.
Definition: mux.c:1190
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:4869
int64_t pts_buffer[MAX_REORDER_DELAY+1]
Definition: avformat.h:1103
int(* init)(struct AVFormatContext *)
Initialize format.
Definition: avformat.h:620
#define AVSTREAM_INIT_IN_INIT_OUTPUT
stream parameters initialized in avformat_init_output
Definition: avformat.h:2518
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:786
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:1357
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:938
int num
Numerator.
Definition: rational.h:59
The bitstream filter state.
Definition: bsf.h:49
int index
stream index in AVFormatContext
Definition: avformat.h:877
static int prepare_input_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)
Definition: mux.c:762
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:914
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1105
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1804
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:1296
static int write_uncoded_frame_internal(AVFormatContext *s, int stream_index, AVFrame *frame, int interleaved)
Definition: mux.c:1332
int64_t offset
Offset to remap timestamps to be non-negative.
Definition: internal.h:106
void * priv_data
Definition: avformat.h:891
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:1388
static void error(const char *err)
#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:1659
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:1305
static int write_packets_common(AVFormatContext *s, AVPacket *pkt, int interleaved)
Definition: mux.c:1167
int(* interleave_packet)(struct AVFormatContext *, AVPacket *out, AVPacket *in, int flush)
A format-specific function for interleavement.
Definition: avformat.h:566
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:1351
int64_t output_ts_offset
Output timestamp offset, in microseconds.
Definition: avformat.h:1868
int64_t cur_dts
Definition: avformat.h:1079
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:117
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
#define CHUNK_START
Definition: mux.c:810
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:620
#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:550
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:401
void avio_write_marker(AVIOContext *s, int64_t time, enum AVIODataMarkerType type)
Mark the written bytestream as a specific type.
Definition: aviobuf.c:483
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:208
const char * name
Definition: bsf.h:99
void ff_compute_frame_duration(AVFormatContext *s, int *pnum, int *pden, AVStream *st, AVCodecParserContext *pc, AVPacket *pkt)
Return the frame duration in seconds.
Definition: utils.c:918
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:1482
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:1653
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:1532
#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:2517
static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
Interleave an AVPacket correctly so it can be muxed.
Definition: mux.c:1067
#define AVFMT_FLAG_BITEXACT
When muxing, try to avoid writing any random/volatile data to the output.
Definition: avformat.h:1499
#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:884
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
#define src
Definition: vp8dsp.c:254
#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:1492
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:1591
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:1566
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:1113
static int validate_codec_tag(AVFormatContext *s, AVStream *st)
Definition: mux.c:196
#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:635
char * url
input or output URL.
Definition: avformat.h:1447
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:981
#define FFMAX(a, b)
Definition: common.h:94
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
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:663
int streams_initialized
Whether or not avformat_init_output fully initialized streams.
Definition: internal.h:134
common internal API header
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
#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:552
#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:593
#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:561
#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:1682
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:1666
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:1630
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:844
ff_const59 struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1370
if(ret)
static void comp(unsigned char *dst, ptrdiff_t dst_stride, unsigned char *src, ptrdiff_t src_stride, int add)
Definition: eamad.c:83
Stream structure.
Definition: avformat.h:876
#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:1032
#define FF_FDEBUG_TS
Definition: avformat.h:1635
int frame_size
Definition: mxfenc.c:2166
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:1135
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1231
int64_t pkt_duration
duration of the corresponding packet, expressed in AVStream->time_base units, 0 if unknown...
Definition: frame.h:587
int debug
Flags to enable debugging.
Definition: avformat.h:1634
#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:1655
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
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:561
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:1592
unsigned int avpriv_toupper4(unsigned int x)
Definition: utils.c:1850
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:812
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:849
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:2100
void(* get_output_timestamp)(struct AVFormatContext *s, int stream, int64_t *dts, int64_t *wall)
Definition: avformat.h:577
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:1683
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4379
#define AVFMT_FLAG_AUTO_BSF
Add bitstream filters as requested by the muxer.
Definition: avformat.h:1510
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:1774
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
int sample_rate
Audio only.
Definition: codec_par.h:170
int64_t interleaver_chunk_duration
Definition: avformat.h:1125
#define AVFMT_AVOID_NEG_TS_MAKE_ZERO
Shift timestamps so that they start at 0.
Definition: avformat.h:1685
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
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1610
const OptionDef options[]
Definition: ffmpeg_opt.c:3393
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:84
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:1382
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:1715
int error_recognition
Error recognition; higher values will detect more errors but may misdetect some more or less valid pa...
Definition: avformat.h:1618
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:929
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
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:927
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:1376
#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
int64_t mux_ts_offset
Timestamp offset added to timestamps before muxing.
Definition: avformat.h:1178
static int interleaved_write_packet(AVFormatContext *s, AVPacket *pkt, int flush)
Definition: mux.c:1094
#define AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE
Shift timestamps so they are non negative.
Definition: avformat.h:1684
struct AVPacketList * packet_buffer_end
Definition: internal.h:77
#define av_free(p)
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:85
#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:1707
void * priv_data
Format private data.
Definition: avformat.h:1379
void(* deinit)(struct AVFormatContext *)
Deinitialize format.
Definition: avformat.h:629
#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:1075
const AVCodecDescriptor * avcodec_descriptor_get(enum AVCodecID id)
Definition: codec_desc.c:3429
int(* write_packet)(struct AVFormatContext *, AVPacket *pkt)
Write a packet.
Definition: avformat.h:560
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:1251
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:557
MPEG-1 4:2:0, JPEG 4:2:0, H.263 4:2:0.
Definition: pixfmt.h:560
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
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:905
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:406
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
struct AVPacketList * last_in_packet_buffer
last packet in packet_buffer for this stream when muxing.
Definition: avformat.h:1100
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:1509
static uint8_t tmp[11]
Definition: aes_ctr.c:26