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hlsenc.c
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1 /*
2  * Apple HTTP Live Streaming segmenter
3  * Copyright (c) 2012, Luca Barbato
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 "config.h"
23 #include <float.h>
24 #include <stdint.h>
25 #if HAVE_UNISTD_H
26 #include <unistd.h>
27 #endif
28 
29 #include "libavutil/avassert.h"
30 #include "libavutil/mathematics.h"
31 #include "libavutil/parseutils.h"
32 #include "libavutil/avstring.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/log.h"
36 
37 #include "avformat.h"
38 #include "internal.h"
39 #include "os_support.h"
40 
41 #define KEYSIZE 16
42 #define LINE_BUFFER_SIZE 1024
43 
44 typedef struct HLSSegment {
45  char filename[1024];
46  char sub_filename[1024];
47  double duration; /* in seconds */
48  int64_t pos;
49  int64_t size;
50 
52  char iv_string[KEYSIZE*2 + 1];
53 
54  struct HLSSegment *next;
55 } HLSSegment;
56 
57 typedef enum HLSFlags {
58  // Generate a single media file and use byte ranges in the playlist.
59  HLS_SINGLE_FILE = (1 << 0),
60  HLS_DELETE_SEGMENTS = (1 << 1),
61  HLS_ROUND_DURATIONS = (1 << 2),
62  HLS_DISCONT_START = (1 << 3),
63  HLS_OMIT_ENDLIST = (1 << 4),
64 } HLSFlags;
65 
66 typedef struct HLSContext {
67  const AVClass *class; // Class for private options.
68  unsigned number;
69  int64_t sequence;
70  int64_t start_sequence;
73 
76 
77  float time; // Set by a private option.
78  int max_nb_segments; // Set by a private option.
79  int wrap; // Set by a private option.
80  uint32_t flags; // enum HLSFlags
82 
83  int use_localtime; ///< flag to expand filename with localtime
85  int64_t recording_time;
86  int has_video;
88  int64_t start_pts;
89  int64_t end_pts;
90  double duration; // last segment duration computed so far, in seconds
91  int64_t start_pos; // last segment starting position
92  int64_t size; // last segment size
95 
99 
100  char *basename;
103  char *baseurl;
108 
112  char key_string[KEYSIZE*2 + 1];
113  char iv_string[KEYSIZE*2 + 1];
115 
116 } HLSContext;
117 
119 
120  HLSSegment *segment, *previous_segment = NULL;
121  float playlist_duration = 0.0f;
122  int ret = 0, path_size, sub_path_size;
123  char *dirname = NULL, *p, *sub_path;
124  char *path = NULL;
125 
126  segment = hls->segments;
127  while (segment) {
128  playlist_duration += segment->duration;
129  segment = segment->next;
130  }
131 
132  segment = hls->old_segments;
133  while (segment) {
134  playlist_duration -= segment->duration;
135  previous_segment = segment;
136  segment = previous_segment->next;
137  if (playlist_duration <= -previous_segment->duration) {
138  previous_segment->next = NULL;
139  break;
140  }
141  }
142 
143  if (segment) {
144  if (hls->segment_filename) {
145  dirname = av_strdup(hls->segment_filename);
146  } else {
147  dirname = av_strdup(hls->avf->filename);
148  }
149  if (!dirname) {
150  ret = AVERROR(ENOMEM);
151  goto fail;
152  }
153  p = (char *)av_basename(dirname);
154  *p = '\0';
155  }
156 
157  while (segment) {
158  av_log(hls, AV_LOG_DEBUG, "deleting old segment %s\n",
159  segment->filename);
160  path_size = strlen(dirname) + strlen(segment->filename) + 1;
161  path = av_malloc(path_size);
162  if (!path) {
163  ret = AVERROR(ENOMEM);
164  goto fail;
165  }
166  sub_path_size = strlen(dirname) + strlen(segment->sub_filename) + 1;
167  sub_path = av_malloc(sub_path_size);
168  if (!sub_path) {
169  ret = AVERROR(ENOMEM);
170  goto fail;
171  }
172 
173  av_strlcpy(path, dirname, path_size);
174  av_strlcat(path, segment->filename, path_size);
175  if (unlink(path) < 0) {
176  av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
177  path, strerror(errno));
178  }
179 
180  av_strlcpy(sub_path, dirname, sub_path_size);
181  av_strlcat(sub_path, segment->sub_filename, sub_path_size);
182  if (unlink(sub_path) < 0) {
183  av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
184  sub_path, strerror(errno));
185  }
186  av_freep(&path);
187  av_free(sub_path);
188  previous_segment = segment;
189  segment = previous_segment->next;
190  av_free(previous_segment);
191  }
192 
193 fail:
194  av_free(path);
195  av_free(dirname);
196 
197  return ret;
198 }
199 
201 {
202  HLSContext *hls = s->priv_data;
203  int ret;
204  AVIOContext *pb;
205  uint8_t key[KEYSIZE];
206 
207  if ((ret = avio_open2(&pb, hls->key_info_file, AVIO_FLAG_READ,
208  &s->interrupt_callback, NULL)) < 0) {
209  av_log(hls, AV_LOG_ERROR,
210  "error opening key info file %s\n", hls->key_info_file);
211  return ret;
212  }
213 
214  ff_get_line(pb, hls->key_uri, sizeof(hls->key_uri));
215  hls->key_uri[strcspn(hls->key_uri, "\r\n")] = '\0';
216 
217  ff_get_line(pb, hls->key_file, sizeof(hls->key_file));
218  hls->key_file[strcspn(hls->key_file, "\r\n")] = '\0';
219 
220  ff_get_line(pb, hls->iv_string, sizeof(hls->iv_string));
221  hls->iv_string[strcspn(hls->iv_string, "\r\n")] = '\0';
222 
223  avio_close(pb);
224 
225  if (!*hls->key_uri) {
226  av_log(hls, AV_LOG_ERROR, "no key URI specified in key info file\n");
227  return AVERROR(EINVAL);
228  }
229 
230  if (!*hls->key_file) {
231  av_log(hls, AV_LOG_ERROR, "no key file specified in key info file\n");
232  return AVERROR(EINVAL);
233  }
234 
235  if ((ret = avio_open2(&pb, hls->key_file, AVIO_FLAG_READ,
236  &s->interrupt_callback, NULL)) < 0) {
237  av_log(hls, AV_LOG_ERROR, "error opening key file %s\n", hls->key_file);
238  return ret;
239  }
240 
241  ret = avio_read(pb, key, sizeof(key));
242  avio_close(pb);
243  if (ret != sizeof(key)) {
244  av_log(hls, AV_LOG_ERROR, "error reading key file %s\n", hls->key_file);
245  if (ret >= 0 || ret == AVERROR_EOF)
246  ret = AVERROR(EINVAL);
247  return ret;
248  }
249  ff_data_to_hex(hls->key_string, key, sizeof(key), 0);
250 
251  return 0;
252 }
253 
255 {
256  HLSContext *hls = s->priv_data;
257  AVFormatContext *oc;
258  AVFormatContext *vtt_oc = NULL;
259  int i, ret;
260 
261  ret = avformat_alloc_output_context2(&hls->avf, hls->oformat, NULL, NULL);
262  if (ret < 0)
263  return ret;
264  oc = hls->avf;
265 
266  oc->oformat = hls->oformat;
268  oc->max_delay = s->max_delay;
269  av_dict_copy(&oc->metadata, s->metadata, 0);
270 
271  if(hls->vtt_oformat) {
273  if (ret < 0)
274  return ret;
275  vtt_oc = hls->vtt_avf;
276  vtt_oc->oformat = hls->vtt_oformat;
277  av_dict_copy(&vtt_oc->metadata, s->metadata, 0);
278  }
279 
280  for (i = 0; i < s->nb_streams; i++) {
281  AVStream *st;
282  AVFormatContext *loc;
284  loc = vtt_oc;
285  else
286  loc = oc;
287 
288  if (!(st = avformat_new_stream(loc, NULL)))
289  return AVERROR(ENOMEM);
292  st->time_base = s->streams[i]->time_base;
293  }
294  hls->start_pos = 0;
295 
296  return 0;
297 }
298 
299 /* Create a new segment and append it to the segment list */
300 static int hls_append_segment(HLSContext *hls, double duration, int64_t pos,
301  int64_t size)
302 {
303  HLSSegment *en = av_malloc(sizeof(*en));
304  int ret;
305 
306  if (!en)
307  return AVERROR(ENOMEM);
308 
309  av_strlcpy(en->filename, av_basename(hls->avf->filename), sizeof(en->filename));
310 
311  if(hls->has_subtitle)
313 
314  en->duration = duration;
315  en->pos = pos;
316  en->size = size;
317  en->next = NULL;
318 
319  if (hls->key_info_file) {
320  av_strlcpy(en->key_uri, hls->key_uri, sizeof(en->key_uri));
321  av_strlcpy(en->iv_string, hls->iv_string, sizeof(en->iv_string));
322  }
323 
324  if (!hls->segments)
325  hls->segments = en;
326  else
327  hls->last_segment->next = en;
328 
329  hls->last_segment = en;
330 
331  if (hls->max_nb_segments && hls->nb_entries >= hls->max_nb_segments) {
332  en = hls->segments;
333  hls->segments = en->next;
334  if (en && hls->flags & HLS_DELETE_SEGMENTS &&
335  !(hls->flags & HLS_SINGLE_FILE || hls->wrap)) {
336  en->next = hls->old_segments;
337  hls->old_segments = en;
338  if ((ret = hls_delete_old_segments(hls)) < 0)
339  return ret;
340  } else
341  av_free(en);
342  } else
343  hls->nb_entries++;
344 
345  hls->sequence++;
346 
347  return 0;
348 }
349 
351 {
352  HLSSegment *en;
353 
354  while(p) {
355  en = p;
356  p = p->next;
357  av_free(en);
358  }
359 }
360 
361 static int hls_window(AVFormatContext *s, int last)
362 {
363  HLSContext *hls = s->priv_data;
364  HLSSegment *en;
365  int target_duration = 0;
366  int ret = 0;
367  AVIOContext *out = NULL;
368  AVIOContext *sub_out = NULL;
369  char temp_filename[1024];
370  int64_t sequence = FFMAX(hls->start_sequence, hls->sequence - hls->nb_entries);
371  int version = hls->flags & HLS_SINGLE_FILE ? 4 : 3;
372  const char *proto = avio_find_protocol_name(s->filename);
373  int use_rename = proto && !strcmp(proto, "file");
374  static unsigned warned_non_file;
375  char *key_uri = NULL;
376  char *iv_string = NULL;
377 
378  if (!use_rename && !warned_non_file++)
379  av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporarly partial files\n");
380 
381  snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->filename);
382  if ((ret = avio_open2(&out, temp_filename, AVIO_FLAG_WRITE,
383  &s->interrupt_callback, NULL)) < 0)
384  goto fail;
385 
386  for (en = hls->segments; en; en = en->next) {
387  if (target_duration < en->duration)
388  target_duration = ceil(en->duration);
389  }
390 
391  hls->discontinuity_set = 0;
392  avio_printf(out, "#EXTM3U\n");
393  avio_printf(out, "#EXT-X-VERSION:%d\n", version);
394  if (hls->allowcache == 0 || hls->allowcache == 1) {
395  avio_printf(out, "#EXT-X-ALLOW-CACHE:%s\n", hls->allowcache == 0 ? "NO" : "YES");
396  }
397  avio_printf(out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
398  avio_printf(out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
399 
400  av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n",
401  sequence);
402  if((hls->flags & HLS_DISCONT_START) && sequence==hls->start_sequence && hls->discontinuity_set==0 ){
403  avio_printf(out, "#EXT-X-DISCONTINUITY\n");
404  hls->discontinuity_set = 1;
405  }
406  for (en = hls->segments; en; en = en->next) {
407  if (hls->key_info_file && (!key_uri || strcmp(en->key_uri, key_uri) ||
408  av_strcasecmp(en->iv_string, iv_string))) {
409  avio_printf(out, "#EXT-X-KEY:METHOD=AES-128,URI=\"%s\"", en->key_uri);
410  if (*en->iv_string)
411  avio_printf(out, ",IV=0x%s", en->iv_string);
412  avio_printf(out, "\n");
413  key_uri = en->key_uri;
414  iv_string = en->iv_string;
415  }
416 
417  if (hls->flags & HLS_ROUND_DURATIONS)
418  avio_printf(out, "#EXTINF:%d,\n", (int)round(en->duration));
419  else
420  avio_printf(out, "#EXTINF:%f,\n", en->duration);
421  if (hls->flags & HLS_SINGLE_FILE)
422  avio_printf(out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
423  en->size, en->pos);
424  if (hls->baseurl)
425  avio_printf(out, "%s", hls->baseurl);
426  avio_printf(out, "%s\n", en->filename);
427  }
428 
429  if (last && (hls->flags & HLS_OMIT_ENDLIST)==0)
430  avio_printf(out, "#EXT-X-ENDLIST\n");
431 
432  if( hls->vtt_m3u8_name ) {
433  if ((ret = avio_open2(&sub_out, hls->vtt_m3u8_name, AVIO_FLAG_WRITE,
434  &s->interrupt_callback, NULL)) < 0)
435  goto fail;
436  avio_printf(sub_out, "#EXTM3U\n");
437  avio_printf(sub_out, "#EXT-X-VERSION:%d\n", version);
438  if (hls->allowcache == 0 || hls->allowcache == 1) {
439  avio_printf(sub_out, "#EXT-X-ALLOW-CACHE:%s\n", hls->allowcache == 0 ? "NO" : "YES");
440  }
441  avio_printf(sub_out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
442  avio_printf(sub_out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
443 
444  av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n",
445  sequence);
446 
447  for (en = hls->segments; en; en = en->next) {
448  avio_printf(sub_out, "#EXTINF:%f,\n", en->duration);
449  if (hls->flags & HLS_SINGLE_FILE)
450  avio_printf(sub_out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
451  en->size, en->pos);
452  if (hls->baseurl)
453  avio_printf(sub_out, "%s", hls->baseurl);
454  avio_printf(sub_out, "%s\n", en->sub_filename);
455  }
456 
457  if (last)
458  avio_printf(sub_out, "#EXT-X-ENDLIST\n");
459 
460  }
461 
462 fail:
463  avio_closep(&out);
464  avio_closep(&sub_out);
465  if (ret >= 0 && use_rename)
466  ff_rename(temp_filename, s->filename, s);
467  return ret;
468 }
469 
471 {
472  HLSContext *c = s->priv_data;
473  AVFormatContext *oc = c->avf;
474  AVFormatContext *vtt_oc = c->vtt_avf;
476  char *filename, iv_string[KEYSIZE*2 + 1];
477  int err = 0;
478 
479  if (c->flags & HLS_SINGLE_FILE) {
480  av_strlcpy(oc->filename, c->basename,
481  sizeof(oc->filename));
482  if (c->vtt_basename)
483  av_strlcpy(vtt_oc->filename, c->vtt_basename,
484  sizeof(vtt_oc->filename));
485  } else {
486  if (c->use_localtime) {
487  time_t now0;
488  struct tm *tm, tmpbuf;
489  time(&now0);
490  tm = localtime_r(&now0, &tmpbuf);
491  if (!strftime(oc->filename, sizeof(oc->filename), c->basename, tm)) {
492  av_log(oc, AV_LOG_ERROR, "Could not get segment filename with use_localtime\n");
493  return AVERROR(EINVAL);
494  }
495  } else if (av_get_frame_filename(oc->filename, sizeof(oc->filename),
496  c->basename, c->wrap ? c->sequence % c->wrap : c->sequence) < 0) {
497  av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s' you can try use -use_localtime 1 with it\n", c->basename);
498  return AVERROR(EINVAL);
499  }
500  if( c->vtt_basename) {
501  if (av_get_frame_filename(vtt_oc->filename, sizeof(vtt_oc->filename),
502  c->vtt_basename, c->wrap ? c->sequence % c->wrap : c->sequence) < 0) {
503  av_log(vtt_oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", c->vtt_basename);
504  return AVERROR(EINVAL);
505  }
506  }
507  }
508  c->number++;
509 
510  if (c->key_info_file) {
511  if ((err = hls_encryption_start(s)) < 0)
512  return err;
513  if ((err = av_dict_set(&options, "encryption_key", c->key_string, 0))
514  < 0)
515  return err;
516  err = av_strlcpy(iv_string, c->iv_string, sizeof(iv_string));
517  if (!err)
518  snprintf(iv_string, sizeof(iv_string), "%032"PRIx64, c->sequence);
519  if ((err = av_dict_set(&options, "encryption_iv", iv_string, 0)) < 0)
520  return err;
521 
522  filename = av_asprintf("crypto:%s", oc->filename);
523  if (!filename) {
524  av_dict_free(&options);
525  return AVERROR(ENOMEM);
526  }
527  err = avio_open2(&oc->pb, filename, AVIO_FLAG_WRITE,
528  &s->interrupt_callback, &options);
529  av_free(filename);
530  av_dict_free(&options);
531  if (err < 0)
532  return err;
533  } else
534  if ((err = avio_open2(&oc->pb, oc->filename, AVIO_FLAG_WRITE,
535  &s->interrupt_callback, NULL)) < 0)
536  return err;
537  if (c->vtt_basename) {
538  if ((err = avio_open2(&vtt_oc->pb, vtt_oc->filename, AVIO_FLAG_WRITE,
539  &s->interrupt_callback, NULL)) < 0)
540  return err;
541  }
542 
543  if (oc->oformat->priv_class && oc->priv_data)
544  av_opt_set(oc->priv_data, "mpegts_flags", "resend_headers", 0);
545 
546  if (c->vtt_basename)
547  avformat_write_header(vtt_oc,NULL);
548 
549  return 0;
550 }
551 
553 {
554  HLSContext *hls = s->priv_data;
555  int ret, i;
556  char *p;
557  const char *pattern = "%d.ts";
558  const char *pattern_localtime_fmt = "-%s.ts";
559  const char *vtt_pattern = "%d.vtt";
561  int basename_size;
562  int vtt_basename_size;
563 
564  hls->sequence = hls->start_sequence;
565  hls->recording_time = hls->time * AV_TIME_BASE;
566  hls->start_pts = AV_NOPTS_VALUE;
567 
568  if (hls->format_options_str) {
569  ret = av_dict_parse_string(&hls->format_options, hls->format_options_str, "=", ":", 0);
570  if (ret < 0) {
571  av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n", hls->format_options_str);
572  goto fail;
573  }
574  }
575 
576  for (i = 0; i < s->nb_streams; i++) {
577  hls->has_video +=
579  hls->has_subtitle +=
581  }
582 
583  if (hls->has_video > 1)
585  "More than a single video stream present, "
586  "expect issues decoding it.\n");
587 
588  hls->oformat = av_guess_format("mpegts", NULL, NULL);
589 
590  if (!hls->oformat) {
592  goto fail;
593  }
594 
595  if(hls->has_subtitle) {
596  hls->vtt_oformat = av_guess_format("webvtt", NULL, NULL);
597  if (!hls->oformat) {
599  goto fail;
600  }
601  }
602 
603  if (hls->segment_filename) {
604  hls->basename = av_strdup(hls->segment_filename);
605  if (!hls->basename) {
606  ret = AVERROR(ENOMEM);
607  goto fail;
608  }
609  } else {
610  if (hls->flags & HLS_SINGLE_FILE)
611  pattern = ".ts";
612 
613  if (hls->use_localtime) {
614  basename_size = strlen(s->filename) + strlen(pattern_localtime_fmt) + 1;
615  } else {
616  basename_size = strlen(s->filename) + strlen(pattern) + 1;
617  }
618  hls->basename = av_malloc(basename_size);
619  if (!hls->basename) {
620  ret = AVERROR(ENOMEM);
621  goto fail;
622  }
623 
624  av_strlcpy(hls->basename, s->filename, basename_size);
625 
626  p = strrchr(hls->basename, '.');
627  if (p)
628  *p = '\0';
629  if (hls->use_localtime) {
630  av_strlcat(hls->basename, pattern_localtime_fmt, basename_size);
631  } else {
632  av_strlcat(hls->basename, pattern, basename_size);
633  }
634  }
635 
636  if(hls->has_subtitle) {
637 
638  if (hls->flags & HLS_SINGLE_FILE)
639  vtt_pattern = ".vtt";
640  vtt_basename_size = strlen(s->filename) + strlen(vtt_pattern) + 1;
641  hls->vtt_basename = av_malloc(vtt_basename_size);
642  if (!hls->vtt_basename) {
643  ret = AVERROR(ENOMEM);
644  goto fail;
645  }
646  hls->vtt_m3u8_name = av_malloc(vtt_basename_size);
647  if (!hls->vtt_m3u8_name ) {
648  ret = AVERROR(ENOMEM);
649  goto fail;
650  }
651  av_strlcpy(hls->vtt_basename, s->filename, vtt_basename_size);
652  p = strrchr(hls->vtt_basename, '.');
653  if (p)
654  *p = '\0';
655 
656  if( hls->subtitle_filename ) {
657  strcpy(hls->vtt_m3u8_name, hls->subtitle_filename);
658  } else {
659  strcpy(hls->vtt_m3u8_name, hls->vtt_basename);
660  av_strlcat(hls->vtt_m3u8_name, "_vtt.m3u8", vtt_basename_size);
661  }
662  av_strlcat(hls->vtt_basename, vtt_pattern, vtt_basename_size);
663  }
664 
665  if ((ret = hls_mux_init(s)) < 0)
666  goto fail;
667 
668  if ((ret = hls_start(s)) < 0)
669  goto fail;
670 
671  av_dict_copy(&options, hls->format_options, 0);
672  ret = avformat_write_header(hls->avf, &options);
673  if (av_dict_count(options)) {
674  av_log(s, AV_LOG_ERROR, "Some of provided format options in '%s' are not recognized\n", hls->format_options_str);
675  ret = AVERROR(EINVAL);
676  goto fail;
677  }
678  //av_assert0(s->nb_streams == hls->avf->nb_streams);
679  for (i = 0; i < s->nb_streams; i++) {
680  AVStream *inner_st;
681  AVStream *outer_st = s->streams[i];
682  if (outer_st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)
683  inner_st = hls->avf->streams[i];
684  else if (hls->vtt_avf)
685  inner_st = hls->vtt_avf->streams[0];
686  else {
687  /* We have a subtitle stream, when the user does not want one */
688  inner_st = NULL;
689  continue;
690  }
691  avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
692  }
693 fail:
694 
695  av_dict_free(&options);
696  if (ret < 0) {
697  av_freep(&hls->basename);
698  av_freep(&hls->vtt_basename);
699  if (hls->avf)
701  if (hls->vtt_avf)
703 
704  }
705  return ret;
706 }
707 
709 {
710  HLSContext *hls = s->priv_data;
711  AVFormatContext *oc = NULL;
712  AVStream *st = s->streams[pkt->stream_index];
713  int64_t end_pts = hls->recording_time * hls->number;
714  int is_ref_pkt = 1;
715  int ret, can_split = 1;
716  int stream_index = 0;
717 
718  if( st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE ) {
719  oc = hls->vtt_avf;
720  stream_index = 0;
721  } else {
722  oc = hls->avf;
723  stream_index = pkt->stream_index;
724  }
725  if (hls->start_pts == AV_NOPTS_VALUE) {
726  hls->start_pts = pkt->pts;
727  hls->end_pts = pkt->pts;
728  }
729 
730  if (hls->has_video) {
731  can_split = st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
732  pkt->flags & AV_PKT_FLAG_KEY;
733  is_ref_pkt = st->codec->codec_type == AVMEDIA_TYPE_VIDEO;
734  }
735  if (pkt->pts == AV_NOPTS_VALUE)
736  is_ref_pkt = can_split = 0;
737 
738  if (is_ref_pkt)
739  hls->duration = (double)(pkt->pts - hls->end_pts)
740  * st->time_base.num / st->time_base.den;
741 
742  if (can_split && av_compare_ts(pkt->pts - hls->start_pts, st->time_base,
743  end_pts, AV_TIME_BASE_Q) >= 0) {
744  int64_t new_start_pos;
745  av_write_frame(oc, NULL); /* Flush any buffered data */
746 
747  new_start_pos = avio_tell(hls->avf->pb);
748  hls->size = new_start_pos - hls->start_pos;
749  ret = hls_append_segment(hls, hls->duration, hls->start_pos, hls->size);
750  hls->start_pos = new_start_pos;
751  if (ret < 0)
752  return ret;
753 
754  hls->end_pts = pkt->pts;
755  hls->duration = 0;
756 
757  if (hls->flags & HLS_SINGLE_FILE) {
758  if (hls->avf->oformat->priv_class && hls->avf->priv_data)
759  av_opt_set(hls->avf->priv_data, "mpegts_flags", "resend_headers", 0);
760  hls->number++;
761  } else {
762  avio_closep(&oc->pb);
763  if (hls->vtt_avf)
764  avio_close(hls->vtt_avf->pb);
765 
766  ret = hls_start(s);
767  }
768 
769  if (ret < 0)
770  return ret;
771 
773  oc = hls->vtt_avf;
774  else
775  oc = hls->avf;
776 
777  if ((ret = hls_window(s, 0)) < 0)
778  return ret;
779  }
780 
781  ret = ff_write_chained(oc, stream_index, pkt, s, 0);
782 
783  return ret;
784 }
785 
787 {
788  HLSContext *hls = s->priv_data;
789  AVFormatContext *oc = hls->avf;
790  AVFormatContext *vtt_oc = hls->vtt_avf;
791 
792  av_write_trailer(oc);
793  if (oc->pb) {
794  hls->size = avio_tell(hls->avf->pb) - hls->start_pos;
795  avio_closep(&oc->pb);
796  hls_append_segment(hls, hls->duration, hls->start_pos, hls->size);
797  }
798 
799  if (vtt_oc) {
800  if (vtt_oc->pb)
801  av_write_trailer(vtt_oc);
802  hls->size = avio_tell(hls->vtt_avf->pb) - hls->start_pos;
803  avio_closep(&vtt_oc->pb);
804  }
805  av_freep(&hls->basename);
807 
808  if (vtt_oc) {
809  av_freep(&hls->vtt_basename);
810  av_freep(&hls->vtt_m3u8_name);
811  avformat_free_context(vtt_oc);
812  }
813 
814  hls->avf = NULL;
815  hls_window(s, 1);
816 
819  return 0;
820 }
821 
822 #define OFFSET(x) offsetof(HLSContext, x)
823 #define E AV_OPT_FLAG_ENCODING_PARAM
824 static const AVOption options[] = {
825  {"start_number", "set first number in the sequence", OFFSET(start_sequence),AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, E},
826  {"hls_time", "set segment length in seconds", OFFSET(time), AV_OPT_TYPE_FLOAT, {.dbl = 2}, 0, FLT_MAX, E},
827  {"hls_list_size", "set maximum number of playlist entries", OFFSET(max_nb_segments), AV_OPT_TYPE_INT, {.i64 = 5}, 0, INT_MAX, E},
828  {"hls_ts_options","set hls mpegts list of options for the container format used for hls", OFFSET(format_options_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
829  {"hls_vtt_options","set hls vtt list of options for the container format used for hls", OFFSET(vtt_format_options_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
830  {"hls_wrap", "set number after which the index wraps", OFFSET(wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E},
831  {"hls_allow_cache", "explicitly set whether the client MAY (1) or MUST NOT (0) cache media segments", OFFSET(allowcache), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, E},
832  {"hls_base_url", "url to prepend to each playlist entry", OFFSET(baseurl), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
833  {"hls_segment_filename", "filename template for segment files", OFFSET(segment_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
834  {"hls_key_info_file", "file with key URI and key file path", OFFSET(key_info_file), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
835  {"hls_subtitle_path", "set path of hls subtitles", OFFSET(subtitle_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
836  {"hls_flags", "set flags affecting HLS playlist and media file generation", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0 }, 0, UINT_MAX, E, "flags"},
837  {"single_file", "generate a single media file indexed with byte ranges", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SINGLE_FILE }, 0, UINT_MAX, E, "flags"},
838  {"delete_segments", "delete segment files that are no longer part of the playlist", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_DELETE_SEGMENTS }, 0, UINT_MAX, E, "flags"},
839  {"round_durations", "round durations in m3u8 to whole numbers", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_ROUND_DURATIONS }, 0, UINT_MAX, E, "flags"},
840  {"discont_start", "start the playlist with a discontinuity tag", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_DISCONT_START }, 0, UINT_MAX, E, "flags"},
841  {"omit_endlist", "Do not append an endlist when ending stream", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_OMIT_ENDLIST }, 0, UINT_MAX, E, "flags"},
842  { "use_localtime", "set filename expansion with strftime at segment creation", OFFSET(use_localtime), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, E },
843 
844  { NULL },
845 };
846 
847 static const AVClass hls_class = {
848  .class_name = "hls muxer",
849  .item_name = av_default_item_name,
850  .option = options,
851  .version = LIBAVUTIL_VERSION_INT,
852 };
853 
854 
856  .name = "hls",
857  .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
858  .extensions = "m3u8",
859  .priv_data_size = sizeof(HLSContext),
860  .audio_codec = AV_CODEC_ID_AAC,
861  .video_codec = AV_CODEC_ID_H264,
862  .subtitle_codec = AV_CODEC_ID_WEBVTT,
867  .priv_class = &hls_class,
868 };
float time
Definition: hlsenc.c:77
#define NULL
Definition: coverity.c:32
int wrap
Definition: hlsenc.c:79
char key_uri[LINE_BUFFER_SIZE+1]
Definition: hlsenc.c:111
const char * s
Definition: avisynth_c.h:631
Bytestream IO Context.
Definition: avio.h:111
char * basename
Definition: hlsenc.c:100
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1523
AVOption.
Definition: opt.h:255
static int hls_write_trailer(struct AVFormatContext *s)
Definition: hlsenc.c:786
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:447
int av_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file.
Definition: mux.c:691
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:62
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:4083
double duration
Definition: hlsenc.c:47
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:1041
char * vtt_format_options_str
Definition: hlsenc.c:105
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:914
int64_t size
Definition: hlsenc.c:49
int num
numerator
Definition: rational.h:44
int av_dict_count(const AVDictionary *m)
Get number of entries in dictionary.
Definition: dict.c:34
#define AVIO_FLAG_READ
read-only
Definition: avio.h:485
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:486
int version
Definition: avisynth_c.h:629
static AVPacket pkt
#define AVFMT_ALLOW_FLUSH
Format allows flushing.
Definition: avformat.h:481
int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src)
Copy the settings of the source AVCodecContext into the destination AVCodecContext.
Definition: options.c:182
static int hls_window(AVFormatContext *s, int last)
Definition: hlsenc.c:361
Format I/O context.
Definition: avformat.h:1273
int max_nb_segments
Definition: hlsenc.c:78
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
const char * av_basename(const char *path)
Thread safe basename.
Definition: avstring.c:234
uint8_t
#define av_malloc(s)
AVOptions.
miscellaneous OS support macros and functions.
static void hls_free_segments(HLSSegment *p)
Definition: hlsenc.c:350
HLSSegment * old_segments
Definition: hlsenc.c:98
int64_t end_pts
Definition: hlsenc.c:89
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3749
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1341
#define AVERROR_EOF
End of file.
Definition: error.h:55
char * format_options_str
Definition: hlsenc.c:104
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
#define LINE_BUFFER_SIZE
Definition: hlsenc.c:42
ptrdiff_t size
Definition: opengl_enc.c:101
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:390
static int64_t duration
Definition: ffplay.c:326
void av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:213
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:538
struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1292
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1469
int avformat_alloc_output_context2(AVFormatContext **ctx, AVOutputFormat *oformat, const char *format_name, const char *filename)
Allocate an AVFormatContext for an output format.
Definition: mux.c:148
static const AVOption options[]
Definition: hlsenc.c:824
static int hls_write_header(AVFormatContext *s)
Definition: hlsenc.c:552
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1485
#define OFFSET(x)
Definition: hlsenc.c:822
av_default_item_name
#define AVERROR(e)
Definition: error.h:43
struct HLSSegment * next
Definition: hlsenc.c:54
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:175
int avio_close(AVIOContext *s)
Close the resource accessed by the AVIOContext s and free it.
Definition: aviobuf.c:941
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
char sub_filename[1024]
Definition: hlsenc.c:46
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:199
AVDictionary * vtt_format_options
Definition: hlsenc.c:114
#define wrap(func)
Definition: neontest.h:62
simple assert() macros that are a bit more flexible than ISO C assert().
int has_video
Definition: hlsenc.c:86
double duration
Definition: hlsenc.c:90
static av_always_inline av_const double round(double x)
Definition: libm.h:162
char key_uri[LINE_BUFFER_SIZE+1]
Definition: hlsenc.c:51
int64_t recording_time
Definition: hlsenc.c:85
#define FFMAX(a, b)
Definition: common.h:79
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:57
int64_t pos
Definition: hlsenc.c:48
char * vtt_basename
Definition: hlsenc.c:101
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1429
int av_compare_ts(int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b)
Compare 2 timestamps each in its own timebases.
Definition: mathematics.c:145
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:861
char * baseurl
Definition: hlsenc.c:103
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
Definition: hls.c:68
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1329
int discontinuity_set
Definition: hlsenc.c:94
unsigned number
Definition: hlsenc.c:68
char key_string[KEYSIZE *2+1]
Definition: hlsenc.c:112
char filename[1024]
input or output filename
Definition: avformat.h:1349
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:246
int av_strcasecmp(const char *a, const char *b)
Locale-independent case-insensitive compare.
Definition: avstring.c:213
static struct tm * localtime_r(const time_t *clock, struct tm *result)
Definition: time_internal.h:37
int64_t start_pts
Definition: hlsenc.c:88
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:94
static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: hlsenc.c:708
const char * name
Definition: avformat.h:513
HLSSegment * last_segment
Definition: hlsenc.c:97
#define E
Definition: hlsenc.c:823
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:94
HLSSegment * segments
Definition: hlsenc.c:96
AVDictionary * format_options
Definition: hlsenc.c:107
int ff_get_line(AVIOContext *s, char *buf, int maxlen)
Read a whole line of text from AVIOContext.
Definition: aviobuf.c:698
const AVClass * priv_class
AVClass for the private context.
Definition: avformat.h:541
int av_get_frame_filename(char *buf, int buf_size, const char *path, int number)
Return in 'buf' the path with 'd' replaced by a number.
Definition: utils.c:3908
static int hls_delete_old_segments(HLSContext *hls)
Definition: hlsenc.c:118
int use_localtime
flag to expand filename with localtime
Definition: hlsenc.c:83
Stream structure.
Definition: avformat.h:842
int av_dict_parse_string(AVDictionary **pm, const char *str, const char *key_val_sep, const char *pairs_sep, int flags)
Parse the key/value pairs list and add the parsed entries to a dictionary.
Definition: dict.c:176
char iv_string[KEYSIZE *2+1]
Definition: hlsenc.c:52
int64_t start_sequence
Definition: hlsenc.c:70
enum AVMediaType codec_type
Definition: avcodec.h:1510
int has_subtitle
Definition: hlsenc.c:87
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:252
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:267
AVIOContext * pb
I/O context.
Definition: avformat.h:1315
static int hls_encryption_start(AVFormatContext *s)
Definition: hlsenc.c:200
char * key_info_file
Definition: hlsenc.c:109
AVOutputFormat * oformat
Definition: hlsenc.c:71
int allowcache
Definition: hlsenc.c:84
HLSFlags
Definition: hlsenc.c:57
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:69
static int ff_rename(const char *oldpath, const char *newpath, void *logctx)
Wrap errno on rename() error.
Definition: internal.h:447
Describe the class of an AVClass context structure.
Definition: log.h:67
char iv_string[KEYSIZE *2+1]
Definition: hlsenc.c:113
int avio_open2(AVIOContext **s, const char *url, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options)
Create and initialize a AVIOContext for accessing the resource indicated by url.
Definition: aviobuf.c:918
#define snprintf
Definition: snprintf.h:34
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:3686
int64_t sequence
Definition: hlsenc.c:69
misc parsing utilities
size_t av_strlcat(char *dst, const char *src, size_t size)
Append the string src to the string dst, but to a total length of no more than size - 1 bytes...
Definition: avstring.c:93
const char * avio_find_protocol_name(const char *url)
Return the name of the protocol that will handle the passed URL.
Definition: avio.c:418
char key_file[LINE_BUFFER_SIZE+1]
Definition: hlsenc.c:110
static int flags
Definition: cpu.c:47
static int hls_mux_init(AVFormatContext *s)
Definition: hlsenc.c:254
int64_t size
Definition: hlsenc.c:92
static int hls_append_segment(HLSContext *hls, double duration, int64_t pos, int64_t size)
Definition: hlsenc.c:300
int nb_entries
Definition: hlsenc.c:93
Main libavformat public API header.
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:465
static double c[64]
uint32_t flags
Definition: hlsenc.c:80
int pts_wrap_bits
number of bits in pts (used for wrapping control)
Definition: avformat.h:1008
int den
denominator
Definition: rational.h:45
#define KEYSIZE
Definition: hlsenc.c:41
int64_t start_pos
Definition: hlsenc.c:91
char * segment_filename
Definition: hlsenc.c:81
#define av_free(p)
char * vtt_m3u8_name
Definition: hlsenc.c:102
char filename[1024]
Definition: hlsenc.c:45
static int hls_start(AVFormatContext *s)
Definition: hlsenc.c:470
void * priv_data
Format private data.
Definition: avformat.h:1301
char * subtitle_filename
Definition: hlsenc.c:106
static const uint8_t start_sequence[]
Definition: rtpdec_h264.c:65
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:493
AVFormatContext * avf
Definition: hlsenc.c:74
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;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);returnNULL;}returnac;}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;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->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);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> out
AVOutputFormat ff_hls_muxer
Definition: hlsenc.c:855
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:986
#define av_freep(p)
#define AVERROR_MUXER_NOT_FOUND
Muxer not found.
Definition: error.h:60
AVOutputFormat * vtt_oformat
Definition: hlsenc.c:72
int stream_index
Definition: avcodec.h:1425
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:884
static const AVClass hls_class
Definition: hlsenc.c:847
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4034
This structure stores compressed data.
Definition: avcodec.h:1400
int avio_closep(AVIOContext **s)
Close the resource accessed by the AVIOContext *s, free it and set the pointer pointing to it to NULL...
Definition: aviobuf.c:959
static int write_packet(AVFormatContext *s1, AVPacket *pkt)
Definition: v4l2enc.c:86
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
Definition: opt.c:369
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1416
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:240
int avio_printf(AVIOContext *s, const char *fmt,...) av_printf_format(2
AVFormatContext * vtt_avf
Definition: hlsenc.c:75