FFmpeg  2.1.1
hls.c
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1 /*
2  * Apple HTTP Live Streaming demuxer
3  * Copyright (c) 2010 Martin Storsjo
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 /**
23  * @file
24  * Apple HTTP Live Streaming demuxer
25  * http://tools.ietf.org/html/draft-pantos-http-live-streaming
26  */
27 
28 #include "libavutil/avstring.h"
29 #include "libavutil/intreadwrite.h"
30 #include "libavutil/mathematics.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/dict.h"
33 #include "libavutil/time.h"
34 #include "avformat.h"
35 #include "internal.h"
36 #include "avio_internal.h"
37 #include "url.h"
38 
39 #define INITIAL_BUFFER_SIZE 32768
40 
41 /*
42  * An apple http stream consists of a playlist with media segment files,
43  * played sequentially. There may be several playlists with the same
44  * video content, in different bandwidth variants, that are played in
45  * parallel (preferably only one bandwidth variant at a time). In this case,
46  * the user supplied the url to a main playlist that only lists the variant
47  * playlists.
48  *
49  * If the main playlist doesn't point at any variants, we still create
50  * one anonymous toplevel variant for this, to maintain the structure.
51  */
52 
53 enum KeyType {
56 };
57 
58 struct segment {
59  int64_t duration;
63  uint8_t iv[16];
64 };
65 
66 /*
67  * Each variant has its own demuxer. If it currently is active,
68  * it has an open AVIOContext too, and potentially an AVPacket
69  * containing the next packet from this stream.
70  */
71 struct variant {
72  int bandwidth;
78  int index;
82 
83  int finished;
84  int64_t target_duration;
87  struct segment **segments;
90  int64_t last_load_time;
91 
93  uint8_t key[16];
94 };
95 
96 typedef struct HLSContext {
98  struct variant **variants;
103  int64_t seek_timestamp;
106  char *user_agent; ///< holds HTTP user agent set as an AVOption to the HTTP protocol context
107  char *cookies; ///< holds HTTP cookie values set in either the initial response or as an AVOption to the HTTP protocol context
108 } HLSContext;
109 
110 static int read_chomp_line(AVIOContext *s, char *buf, int maxlen)
111 {
112  int len = ff_get_line(s, buf, maxlen);
113  while (len > 0 && av_isspace(buf[len - 1]))
114  buf[--len] = '\0';
115  return len;
116 }
117 
118 static void free_segment_list(struct variant *var)
119 {
120  int i;
121  for (i = 0; i < var->n_segments; i++)
122  av_free(var->segments[i]);
123  av_freep(&var->segments);
124  var->n_segments = 0;
125 }
126 
128 {
129  int i;
130  for (i = 0; i < c->n_variants; i++) {
131  struct variant *var = c->variants[i];
132  free_segment_list(var);
133  av_free_packet(&var->pkt);
134  av_free(var->pb.buffer);
135  if (var->input)
136  ffurl_close(var->input);
137  if (var->ctx) {
138  var->ctx->pb = NULL;
139  avformat_close_input(&var->ctx);
140  }
141  av_free(var);
142  }
143  av_freep(&c->variants);
144  av_freep(&c->cookies);
145  av_freep(&c->user_agent);
146  c->n_variants = 0;
147 }
148 
149 /*
150  * Used to reset a statically allocated AVPacket to a clean slate,
151  * containing no data.
152  */
153 static void reset_packet(AVPacket *pkt)
154 {
155  av_init_packet(pkt);
156  pkt->data = NULL;
157 }
158 
159 static struct variant *new_variant(HLSContext *c, int bandwidth,
160  const char *url, const char *base)
161 {
162  struct variant *var = av_mallocz(sizeof(struct variant));
163  if (!var)
164  return NULL;
165  reset_packet(&var->pkt);
166  var->bandwidth = bandwidth;
167  ff_make_absolute_url(var->url, sizeof(var->url), base, url);
168  dynarray_add(&c->variants, &c->n_variants, var);
169  return var;
170 }
171 
172 struct variant_info {
173  char bandwidth[20];
174 };
175 
176 static void handle_variant_args(struct variant_info *info, const char *key,
177  int key_len, char **dest, int *dest_len)
178 {
179  if (!strncmp(key, "BANDWIDTH=", key_len)) {
180  *dest = info->bandwidth;
181  *dest_len = sizeof(info->bandwidth);
182  }
183 }
184 
185 struct key_info {
187  char method[10];
188  char iv[35];
189 };
190 
191 static void handle_key_args(struct key_info *info, const char *key,
192  int key_len, char **dest, int *dest_len)
193 {
194  if (!strncmp(key, "METHOD=", key_len)) {
195  *dest = info->method;
196  *dest_len = sizeof(info->method);
197  } else if (!strncmp(key, "URI=", key_len)) {
198  *dest = info->uri;
199  *dest_len = sizeof(info->uri);
200  } else if (!strncmp(key, "IV=", key_len)) {
201  *dest = info->iv;
202  *dest_len = sizeof(info->iv);
203  }
204 }
205 
206 static int parse_playlist(HLSContext *c, const char *url,
207  struct variant *var, AVIOContext *in)
208 {
209  int ret = 0, is_segment = 0, is_variant = 0, bandwidth = 0;
210  int64_t duration = 0;
211  enum KeyType key_type = KEY_NONE;
212  uint8_t iv[16] = "";
213  int has_iv = 0;
214  char key[MAX_URL_SIZE] = "";
215  char line[MAX_URL_SIZE];
216  const char *ptr;
217  int close_in = 0;
218 
219  if (!in) {
220  AVDictionary *opts = NULL;
221  close_in = 1;
222  /* Some HLS servers don't like being sent the range header */
223  av_dict_set(&opts, "seekable", "0", 0);
224 
225  // broker prior HTTP options that should be consistent across requests
226  av_dict_set(&opts, "user-agent", c->user_agent, 0);
227  av_dict_set(&opts, "cookies", c->cookies, 0);
228 
229  ret = avio_open2(&in, url, AVIO_FLAG_READ,
230  c->interrupt_callback, &opts);
231  av_dict_free(&opts);
232  if (ret < 0)
233  return ret;
234  }
235 
236  read_chomp_line(in, line, sizeof(line));
237  if (strcmp(line, "#EXTM3U")) {
238  ret = AVERROR_INVALIDDATA;
239  goto fail;
240  }
241 
242  if (var) {
243  free_segment_list(var);
244  var->finished = 0;
245  }
246  while (!url_feof(in)) {
247  read_chomp_line(in, line, sizeof(line));
248  if (av_strstart(line, "#EXT-X-STREAM-INF:", &ptr)) {
249  struct variant_info info = {{0}};
250  is_variant = 1;
252  &info);
253  bandwidth = atoi(info.bandwidth);
254  } else if (av_strstart(line, "#EXT-X-KEY:", &ptr)) {
255  struct key_info info = {{0}};
257  &info);
258  key_type = KEY_NONE;
259  has_iv = 0;
260  if (!strcmp(info.method, "AES-128"))
261  key_type = KEY_AES_128;
262  if (!strncmp(info.iv, "0x", 2) || !strncmp(info.iv, "0X", 2)) {
263  ff_hex_to_data(iv, info.iv + 2);
264  has_iv = 1;
265  }
266  av_strlcpy(key, info.uri, sizeof(key));
267  } else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
268  if (!var) {
269  var = new_variant(c, 0, url, NULL);
270  if (!var) {
271  ret = AVERROR(ENOMEM);
272  goto fail;
273  }
274  }
275  var->target_duration = atoi(ptr) * AV_TIME_BASE;
276  } else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
277  if (!var) {
278  var = new_variant(c, 0, url, NULL);
279  if (!var) {
280  ret = AVERROR(ENOMEM);
281  goto fail;
282  }
283  }
284  var->start_seq_no = atoi(ptr);
285  } else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
286  if (var)
287  var->finished = 1;
288  } else if (av_strstart(line, "#EXTINF:", &ptr)) {
289  is_segment = 1;
290  duration = atof(ptr) * AV_TIME_BASE;
291  } else if (av_strstart(line, "#", NULL)) {
292  continue;
293  } else if (line[0]) {
294  if (is_variant) {
295  if (!new_variant(c, bandwidth, line, url)) {
296  ret = AVERROR(ENOMEM);
297  goto fail;
298  }
299  is_variant = 0;
300  bandwidth = 0;
301  }
302  if (is_segment) {
303  struct segment *seg;
304  if (!var) {
305  var = new_variant(c, 0, url, NULL);
306  if (!var) {
307  ret = AVERROR(ENOMEM);
308  goto fail;
309  }
310  }
311  seg = av_malloc(sizeof(struct segment));
312  if (!seg) {
313  ret = AVERROR(ENOMEM);
314  goto fail;
315  }
316  seg->duration = duration;
317  seg->key_type = key_type;
318  if (has_iv) {
319  memcpy(seg->iv, iv, sizeof(iv));
320  } else {
321  int seq = var->start_seq_no + var->n_segments;
322  memset(seg->iv, 0, sizeof(seg->iv));
323  AV_WB32(seg->iv + 12, seq);
324  }
325  ff_make_absolute_url(seg->key, sizeof(seg->key), url, key);
326  ff_make_absolute_url(seg->url, sizeof(seg->url), url, line);
327  dynarray_add(&var->segments, &var->n_segments, seg);
328  is_segment = 0;
329  }
330  }
331  }
332  if (var)
333  var->last_load_time = av_gettime();
334 
335 fail:
336  if (close_in)
337  avio_close(in);
338  return ret;
339 }
340 
341 static int open_input(HLSContext *c, struct variant *var)
342 {
343  AVDictionary *opts = NULL;
344  int ret;
345  struct segment *seg = var->segments[var->cur_seq_no - var->start_seq_no];
346 
347  // broker prior HTTP options that should be consistent across requests
348  av_dict_set(&opts, "user-agent", c->user_agent, 0);
349  av_dict_set(&opts, "cookies", c->cookies, 0);
350  av_dict_set(&opts, "seekable", "0", 0);
351 
352  if (seg->key_type == KEY_NONE) {
353  ret = ffurl_open(&var->input, seg->url, AVIO_FLAG_READ,
354  &var->parent->interrupt_callback, &opts);
355  goto cleanup;
356  } else if (seg->key_type == KEY_AES_128) {
357  char iv[33], key[33], url[MAX_URL_SIZE];
358  if (strcmp(seg->key, var->key_url)) {
359  URLContext *uc;
360  if (ffurl_open(&uc, seg->key, AVIO_FLAG_READ,
361  &var->parent->interrupt_callback, &opts) == 0) {
362  if (ffurl_read_complete(uc, var->key, sizeof(var->key))
363  != sizeof(var->key)) {
364  av_log(NULL, AV_LOG_ERROR, "Unable to read key file %s\n",
365  seg->key);
366  }
367  ffurl_close(uc);
368  } else {
369  av_log(NULL, AV_LOG_ERROR, "Unable to open key file %s\n",
370  seg->key);
371  }
372  av_strlcpy(var->key_url, seg->key, sizeof(var->key_url));
373  }
374  ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
375  ff_data_to_hex(key, var->key, sizeof(var->key), 0);
376  iv[32] = key[32] = '\0';
377  if (strstr(seg->url, "://"))
378  snprintf(url, sizeof(url), "crypto+%s", seg->url);
379  else
380  snprintf(url, sizeof(url), "crypto:%s", seg->url);
381  if ((ret = ffurl_alloc(&var->input, url, AVIO_FLAG_READ,
382  &var->parent->interrupt_callback)) < 0)
383  goto cleanup;
384  av_opt_set(var->input->priv_data, "key", key, 0);
385  av_opt_set(var->input->priv_data, "iv", iv, 0);
386  /* Need to repopulate options */
387  av_dict_free(&opts);
388  av_dict_set(&opts, "seekable", "0", 0);
389  if ((ret = ffurl_connect(var->input, &opts)) < 0) {
390  ffurl_close(var->input);
391  var->input = NULL;
392  goto cleanup;
393  }
394  ret = 0;
395  }
396  else
397  ret = AVERROR(ENOSYS);
398 
399 cleanup:
400  av_dict_free(&opts);
401  return ret;
402 }
403 
404 static int read_data(void *opaque, uint8_t *buf, int buf_size)
405 {
406  struct variant *v = opaque;
407  HLSContext *c = v->parent->priv_data;
408  int ret, i;
409 
410 restart:
411  if (!v->input) {
412  /* If this is a live stream and the reload interval has elapsed since
413  * the last playlist reload, reload the variant playlists now. */
414  int64_t reload_interval = v->n_segments > 0 ?
415  v->segments[v->n_segments - 1]->duration :
416  v->target_duration;
417 
418 reload:
419  if (!v->finished &&
420  av_gettime() - v->last_load_time >= reload_interval) {
421  if ((ret = parse_playlist(c, v->url, v, NULL)) < 0)
422  return ret;
423  /* If we need to reload the playlist again below (if
424  * there's still no more segments), switch to a reload
425  * interval of half the target duration. */
426  reload_interval = v->target_duration / 2;
427  }
428  if (v->cur_seq_no < v->start_seq_no) {
429  av_log(NULL, AV_LOG_WARNING,
430  "skipping %d segments ahead, expired from playlists\n",
431  v->start_seq_no - v->cur_seq_no);
432  v->cur_seq_no = v->start_seq_no;
433  }
434  if (v->cur_seq_no >= v->start_seq_no + v->n_segments) {
435  if (v->finished)
436  return AVERROR_EOF;
437  while (av_gettime() - v->last_load_time < reload_interval) {
439  return AVERROR_EXIT;
440  av_usleep(100*1000);
441  }
442  /* Enough time has elapsed since the last reload */
443  goto reload;
444  }
445 
446  ret = open_input(c, v);
447  if (ret < 0)
448  return ret;
449  }
450  ret = ffurl_read(v->input, buf, buf_size);
451  if (ret > 0)
452  return ret;
453  ffurl_close(v->input);
454  v->input = NULL;
455  v->cur_seq_no++;
456 
457  c->end_of_segment = 1;
458  c->cur_seq_no = v->cur_seq_no;
459 
460  if (v->ctx && v->ctx->nb_streams &&
461  v->parent->nb_streams >= v->stream_offset + v->ctx->nb_streams) {
462  v->needed = 0;
463  for (i = v->stream_offset; i < v->stream_offset + v->ctx->nb_streams;
464  i++) {
465  if (v->parent->streams[i]->discard < AVDISCARD_ALL)
466  v->needed = 1;
467  }
468  }
469  if (!v->needed) {
470  av_log(v->parent, AV_LOG_INFO, "No longer receiving variant %d\n",
471  v->index);
472  return AVERROR_EOF;
473  }
474  goto restart;
475 }
476 
478 {
479  URLContext *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb->opaque;
480  HLSContext *c = s->priv_data;
481  int ret = 0, i, j, stream_offset = 0;
482 
483  c->interrupt_callback = &s->interrupt_callback;
484 
485  // if the URL context is good, read important options we must broker later
486  if (u && u->prot->priv_data_class) {
487  // get the previous user agent & set back to null if string size is zero
488  av_freep(&c->user_agent);
489  av_opt_get(u->priv_data, "user-agent", 0, (uint8_t**)&(c->user_agent));
490  if (c->user_agent && !strlen(c->user_agent))
491  av_freep(&c->user_agent);
492 
493  // get the previous cookies & set back to null if string size is zero
494  av_freep(&c->cookies);
495  av_opt_get(u->priv_data, "cookies", 0, (uint8_t**)&(c->cookies));
496  if (c->cookies && !strlen(c->cookies))
497  av_freep(&c->cookies);
498  }
499 
500  if ((ret = parse_playlist(c, s->filename, NULL, s->pb)) < 0)
501  goto fail;
502 
503  if (c->n_variants == 0) {
504  av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
505  ret = AVERROR_EOF;
506  goto fail;
507  }
508  /* If the playlist only contained variants, parse each individual
509  * variant playlist. */
510  if (c->n_variants > 1 || c->variants[0]->n_segments == 0) {
511  for (i = 0; i < c->n_variants; i++) {
512  struct variant *v = c->variants[i];
513  if ((ret = parse_playlist(c, v->url, v, NULL)) < 0)
514  goto fail;
515  }
516  }
517 
518  if (c->variants[0]->n_segments == 0) {
519  av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
520  ret = AVERROR_EOF;
521  goto fail;
522  }
523 
524  /* If this isn't a live stream, calculate the total duration of the
525  * stream. */
526  if (c->variants[0]->finished) {
527  int64_t duration = 0;
528  for (i = 0; i < c->variants[0]->n_segments; i++)
529  duration += c->variants[0]->segments[i]->duration;
530  s->duration = duration;
531  }
532 
533  /* Open the demuxer for each variant */
534  for (i = 0; i < c->n_variants; i++) {
535  struct variant *v = c->variants[i];
536  AVInputFormat *in_fmt = NULL;
537  char bitrate_str[20];
538  AVProgram *program;
539 
540  if (v->n_segments == 0)
541  continue;
542 
543  if (!(v->ctx = avformat_alloc_context())) {
544  ret = AVERROR(ENOMEM);
545  goto fail;
546  }
547 
548  v->index = i;
549  v->needed = 1;
550  v->parent = s;
551 
552  /* If this is a live stream with more than 3 segments, start at the
553  * third last segment. */
554  v->cur_seq_no = v->start_seq_no;
555  if (!v->finished && v->n_segments > 3)
556  v->cur_seq_no = v->start_seq_no + v->n_segments - 3;
557 
560  read_data, NULL, NULL);
561  v->pb.seekable = 0;
562  ret = av_probe_input_buffer(&v->pb, &in_fmt, v->segments[0]->url,
563  NULL, 0, 0);
564  if (ret < 0) {
565  /* Free the ctx - it isn't initialized properly at this point,
566  * so avformat_close_input shouldn't be called. If
567  * avformat_open_input fails below, it frees and zeros the
568  * context, so it doesn't need any special treatment like this. */
569  av_log(s, AV_LOG_ERROR, "Error when loading first segment '%s'\n", v->segments[0]->url);
571  v->ctx = NULL;
572  goto fail;
573  }
574  v->ctx->pb = &v->pb;
576  ret = avformat_open_input(&v->ctx, v->segments[0]->url, in_fmt, NULL);
577  if (ret < 0)
578  goto fail;
579 
581  ret = avformat_find_stream_info(v->ctx, NULL);
582  if (ret < 0)
583  goto fail;
584  snprintf(bitrate_str, sizeof(bitrate_str), "%d", v->bandwidth);
585 
586  program = av_new_program(s, i);
587  if (!program)
588  goto fail;
589  av_dict_set(&program->metadata, "variant_bitrate", bitrate_str, 0);
590 
591  /* Create new AVStreams for each stream in this variant */
592  for (j = 0; j < v->ctx->nb_streams; j++) {
593  AVStream *st = avformat_new_stream(s, NULL);
594  AVStream *ist = v->ctx->streams[j];
595  if (!st) {
596  ret = AVERROR(ENOMEM);
597  goto fail;
598  }
600  st->id = i;
603  if (v->bandwidth)
604  av_dict_set(&st->metadata, "variant_bitrate", bitrate_str,
605  0);
606  }
608  }
609 
610  c->first_packet = 1;
611  c->first_timestamp = AV_NOPTS_VALUE;
612  c->seek_timestamp = AV_NOPTS_VALUE;
613 
614  return 0;
615 fail:
617  return ret;
618 }
619 
620 static int recheck_discard_flags(AVFormatContext *s, int first)
621 {
622  HLSContext *c = s->priv_data;
623  int i, changed = 0;
624 
625  /* Check if any new streams are needed */
626  for (i = 0; i < c->n_variants; i++)
627  c->variants[i]->cur_needed = 0;
628 
629  for (i = 0; i < s->nb_streams; i++) {
630  AVStream *st = s->streams[i];
631  struct variant *var = c->variants[s->streams[i]->id];
632  if (st->discard < AVDISCARD_ALL)
633  var->cur_needed = 1;
634  }
635  for (i = 0; i < c->n_variants; i++) {
636  struct variant *v = c->variants[i];
637  if (v->cur_needed && !v->needed) {
638  v->needed = 1;
639  changed = 1;
640  v->cur_seq_no = c->cur_seq_no;
641  v->pb.eof_reached = 0;
642  av_log(s, AV_LOG_INFO, "Now receiving variant %d\n", i);
643  } else if (first && !v->cur_needed && v->needed) {
644  if (v->input)
645  ffurl_close(v->input);
646  v->input = NULL;
647  v->needed = 0;
648  changed = 1;
649  av_log(s, AV_LOG_INFO, "No longer receiving variant %d\n", i);
650  }
651  }
652  return changed;
653 }
654 
656 {
657  HLSContext *c = s->priv_data;
658  int ret, i, minvariant = -1;
659 
660  if (c->first_packet) {
661  recheck_discard_flags(s, 1);
662  c->first_packet = 0;
663  }
664 
665 start:
666  c->end_of_segment = 0;
667  for (i = 0; i < c->n_variants; i++) {
668  struct variant *var = c->variants[i];
669  /* Make sure we've got one buffered packet from each open variant
670  * stream */
671  if (var->needed && !var->pkt.data) {
672  while (1) {
673  int64_t ts_diff;
674  AVStream *st;
675  ret = av_read_frame(var->ctx, &var->pkt);
676  if (ret < 0) {
677  if (!url_feof(&var->pb) && ret != AVERROR_EOF)
678  return ret;
679  reset_packet(&var->pkt);
680  break;
681  } else {
682  if (c->first_timestamp == AV_NOPTS_VALUE &&
683  var->pkt.dts != AV_NOPTS_VALUE)
685  var->ctx->streams[var->pkt.stream_index]->time_base,
687  }
688 
689  if (c->seek_timestamp == AV_NOPTS_VALUE)
690  break;
691 
692  if (var->pkt.dts == AV_NOPTS_VALUE) {
694  break;
695  }
696 
697  st = var->ctx->streams[var->pkt.stream_index];
698  ts_diff = av_rescale_rnd(var->pkt.dts, AV_TIME_BASE,
699  st->time_base.den, AV_ROUND_DOWN) -
700  c->seek_timestamp;
701  if (ts_diff >= 0 && (c->seek_flags & AVSEEK_FLAG_ANY ||
702  var->pkt.flags & AV_PKT_FLAG_KEY)) {
704  break;
705  }
706  av_free_packet(&var->pkt);
707  reset_packet(&var->pkt);
708  }
709  }
710  /* Check if this stream still is on an earlier segment number, or
711  * has the packet with the lowest dts */
712  if (var->pkt.data) {
713  struct variant *minvar = c->variants[minvariant];
714  if (minvariant < 0 || var->cur_seq_no < minvar->cur_seq_no) {
715  minvariant = i;
716  } else if (var->cur_seq_no == minvar->cur_seq_no) {
717  int64_t dts = var->pkt.dts;
718  int64_t mindts = minvar->pkt.dts;
719  AVStream *st = var->ctx->streams[var->pkt.stream_index];
720  AVStream *minst = minvar->ctx->streams[minvar->pkt.stream_index];
721 
722  if (dts == AV_NOPTS_VALUE) {
723  minvariant = i;
724  } else if (mindts != AV_NOPTS_VALUE) {
725  if (st->start_time != AV_NOPTS_VALUE)
726  dts -= st->start_time;
727  if (minst->start_time != AV_NOPTS_VALUE)
728  mindts -= minst->start_time;
729 
730  if (av_compare_ts(dts, st->time_base,
731  mindts, minst->time_base) < 0)
732  minvariant = i;
733  }
734  }
735  }
736  }
737  if (c->end_of_segment) {
738  if (recheck_discard_flags(s, 0))
739  goto start;
740  }
741  /* If we got a packet, return it */
742  if (minvariant >= 0) {
743  *pkt = c->variants[minvariant]->pkt;
744  pkt->stream_index += c->variants[minvariant]->stream_offset;
745  reset_packet(&c->variants[minvariant]->pkt);
746  return 0;
747  }
748  return AVERROR_EOF;
749 }
750 
752 {
753  HLSContext *c = s->priv_data;
754 
756  return 0;
757 }
758 
759 static int hls_read_seek(AVFormatContext *s, int stream_index,
760  int64_t timestamp, int flags)
761 {
762  HLSContext *c = s->priv_data;
763  int i, j, ret;
764 
765  if ((flags & AVSEEK_FLAG_BYTE) || !c->variants[0]->finished)
766  return AVERROR(ENOSYS);
767 
768  c->seek_flags = flags;
769  c->seek_timestamp = stream_index < 0 ? timestamp :
770  av_rescale_rnd(timestamp, AV_TIME_BASE,
771  s->streams[stream_index]->time_base.den,
772  flags & AVSEEK_FLAG_BACKWARD ?
774  timestamp = av_rescale_rnd(timestamp, AV_TIME_BASE, stream_index >= 0 ?
775  s->streams[stream_index]->time_base.den :
777  AV_ROUND_DOWN : AV_ROUND_UP);
778  if (s->duration < c->seek_timestamp) {
780  return AVERROR(EIO);
781  }
782 
783  ret = AVERROR(EIO);
784  for (i = 0; i < c->n_variants; i++) {
785  /* Reset reading */
786  struct variant *var = c->variants[i];
787  int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ?
788  0 : c->first_timestamp;
789  if (var->input) {
790  ffurl_close(var->input);
791  var->input = NULL;
792  }
793  av_free_packet(&var->pkt);
794  reset_packet(&var->pkt);
795  var->pb.eof_reached = 0;
796  /* Clear any buffered data */
797  var->pb.buf_end = var->pb.buf_ptr = var->pb.buffer;
798  /* Reset the pos, to let the mpegts demuxer know we've seeked. */
799  var->pb.pos = 0;
800 
801  /* Locate the segment that contains the target timestamp */
802  for (j = 0; j < var->n_segments; j++) {
803  if (timestamp >= pos &&
804  timestamp < pos + var->segments[j]->duration) {
805  var->cur_seq_no = var->start_seq_no + j;
806  ret = 0;
807  break;
808  }
809  pos += var->segments[j]->duration;
810  }
811  if (ret)
813  }
814  return ret;
815 }
816 
817 static int hls_probe(AVProbeData *p)
818 {
819  /* Require #EXTM3U at the start, and either one of the ones below
820  * somewhere for a proper match. */
821  if (strncmp(p->buf, "#EXTM3U", 7))
822  return 0;
823  if (strstr(p->buf, "#EXT-X-STREAM-INF:") ||
824  strstr(p->buf, "#EXT-X-TARGETDURATION:") ||
825  strstr(p->buf, "#EXT-X-MEDIA-SEQUENCE:"))
826  return AVPROBE_SCORE_MAX;
827  return 0;
828 }
829 
831  .name = "hls,applehttp",
832  .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
833  .priv_data_size = sizeof(HLSContext),
839 };
int needed
Definition: hls.c:88
float v
void ff_make_absolute_url(char *buf, int size, const char *base, const char *rel)
Convert a relative url into an absolute url, given a base url.
Definition: url.c:80
const char * s
Definition: avisynth_c.h:668
Bytestream IO Context.
Definition: avio.h:68
int bandwidth
Definition: hls.c:72
URLContext * input
Definition: hls.c:76
int cur_needed
Definition: hls.c:88
void av_free_packet(AVPacket *pkt)
Free a packet.
Definition: avpacket.c:279
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1161
void(* ff_parse_key_val_cb)(void *context, const char *key, int key_len, char **dest, int *dest_len)
Callback function type for ff_parse_key_value.
Definition: internal.h:167
char key_url[MAX_URL_SIZE]
Definition: hls.c:92
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:478
int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding) av_const
Rescale a 64-bit integer with specified rounding.
Definition: mathematics.c:60
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: avcodec.h:4153
int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
Definition: utils.c:487
int avio_close(AVIOContext *s)
Close the resource accessed by the AVIOContext s and free it.
Definition: aviobuf.c:860
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:3922
int av_usleep(unsigned usec)
Sleep for a period of time.
Definition: time.c:56
void * opaque
A private pointer, passed to the read/write/seek/...
Definition: avio.h:89
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
int ffurl_connect(URLContext *uc, AVDictionary **options)
Connect an URLContext that has been allocated by ffurl_alloc.
Definition: avio.c:197
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:686
int finished
Definition: hls.c:83
int num
numerator
Definition: rational.h:44
struct URLProtocol * prot
Definition: url.h:43
void av_log(void *avcl, int level, const char *fmt,...) av_printf_format(3
Send the specified message to the log if the level is less than or equal to the current av_log_level...
int n_segments
Definition: hls.c:86
int64_t last_load_time
Definition: hls.c:90
discard all
Definition: avcodec.h:618
char url[MAX_URL_SIZE]
Definition: hls.c:60
char * user_agent
holds HTTP user agent set as an AVOption to the HTTP protocol context
Definition: hls.c:106
int ctx_flags
Format-specific flags, see AVFMTCTX_xx.
Definition: avformat.h:1004
static void reset_packet(AVPacket *pkt)
Definition: hls.c:153
int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src)
Copy the settings of the source AVCodecContext into the destination AVCodecContext.
Definition: options.c:185
void av_freep(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:234
const AVClass * priv_data_class
Definition: url.h:89
if((e=av_dict_get(options,"", NULL, AV_DICT_IGNORE_SUFFIX)))
Definition: avfilter.c:965
AVDictionary * metadata
Definition: avformat.h:735
Format I/O context.
Definition: avformat.h:968
#define MAX_URL_SIZE
Definition: internal.h:27
#define AVFMT_FLAG_CUSTOM_IO
The caller has supplied a custom AVIOContext, don&#39;t avio_close() it.
Definition: avformat.h:1053
unsigned char * buffer
Start of the buffer.
Definition: avio.h:82
uint8_t iv[16]
Definition: hls.c:63
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:843
uint8_t
Round toward +infinity.
Definition: mathematics.h:71
int n_variants
Definition: hls.c:97
int start_seq_no
Definition: hls.c:85
#define AVSEEK_FLAG_BYTE
seeking based on position in bytes
Definition: avformat.h:1839
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:336
int id
Format-specific stream ID.
Definition: avformat.h:674
#define AVERROR_EXIT
AVInputFormat ff_hls_demuxer
Definition: hls.c:830
static int read_data(void *opaque, uint8_t *buf, int buf_size)
Definition: hls.c:404
#define AV_WB32(p, darg)
Definition: intreadwrite.h:265
int64_t seek_timestamp
Definition: hls.c:103
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
static int64_t duration
Definition: ffplay.c:306
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3348
int end_of_segment
Definition: hls.c:100
char method[10]
Definition: hls.c:187
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1113
struct variant ** variants
Definition: hls.c:98
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq) av_const
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:130
Callback for checking whether to abort blocking functions.
Definition: avio.h:51
struct segment ** segments
Definition: hls.c:87
int index
Definition: hls.c:78
int ffurl_alloc(URLContext **puc, const char *filename, int flags, const AVIOInterruptCB *int_cb)
Create a URLContext for accessing to the resource indicated by url, but do not initiate the connectio...
Definition: avio.c:218
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: avcodec.h:4147
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
Definition: mem.c:219
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){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));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=av_sample_fmt_is_planar(in_fmt);out_planar=av_sample_fmt_is_planar(out_fmt);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);ff_audio_convert_init_arm(ac);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_dlog(ac->avr,"%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-> in
AVIOInterruptCB * interrupt_callback
Definition: hls.c:105
char bandwidth[20]
Definition: hls.c:173
static struct variant * new_variant(HLSContext *c, int bandwidth, const char *url, const char *base)
Definition: hls.c:159
static void handle_key_args(struct key_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:191
void * priv_data
Format private data.
Definition: avformat.h:988
char filename[1024]
input or output filename
Definition: avformat.h:1018
#define AVIO_FLAG_READ
read-only
Definition: avio.h:332
AVIOContext pb
Definition: hls.c:74
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:151
void av_dict_free(AVDictionary **m)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:162
Definition: graph2dot.c:48
void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
Definition: utils.c:3459
int first_packet
Definition: hls.c:101
int av_isspace(int c)
Locale-independent conversion of ASCII isspace.
Definition: avstring.c:298
New fields can be added to the end with minor version bumps.
Definition: avformat.h:912
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:82
unsigned char * buf_end
End of the data, may be less than buffer+buffer_size if the read function returned less data than req...
Definition: avio.h:85
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1069
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:135
goto fail
Definition: avfilter.c:963
Definition: hls.c:58
unsigned int nb_streams
A list of all streams in the file.
Definition: avformat.h:1015
char url[MAX_URL_SIZE]
Definition: hls.c:73
int64_t av_gettime(void)
Get the current time in microseconds.
Definition: time.c:39
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:117
#define dynarray_add(tab, nb_ptr, elem)
Definition: internal.h:58
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avcodec.h:2284
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:54
ret
Definition: avfilter.c:961
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:1840
AVStream ** streams
Definition: avformat.h:1016
int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt, const char *filename, void *logctx, unsigned int offset, unsigned int max_probe_size)
Like av_probe_input_buffer2() but returns 0 on success.
Definition: utils.c:416
void * av_malloc(size_t size) av_malloc_attrib 1(1)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:73
Definition: hls.c:96
static int hls_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: hls.c:655
int64_t target_duration
Definition: hls.c:84
Definition: hls.c:185
AVProgram * av_new_program(AVFormatContext *s, int id)
Definition: utils.c:3407
unsigned char * buf_ptr
Current position in the buffer.
Definition: avio.h:84
float u
int ff_get_line(AVIOContext *s, char *buf, int maxlen)
Read a whole line of text from AVIOContext.
Definition: aviobuf.c:632
char * cookies
holds HTTP cookie values set in either the initial response or as an AVOption to the HTTP protocol co...
Definition: hls.c:107
uint8_t * read_buffer
Definition: hls.c:75
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:592
enum KeyType key_type
Definition: hls.c:62
static void free_segment_list(struct variant *var)
Definition: hls.c:118
Stream structure.
Definition: avformat.h:667
static int open_input(HLSContext *c, struct variant *var)
Definition: hls.c:341
static int read_chomp_line(AVIOContext *s, char *buf, int maxlen)
Definition: hls.c:110
int64_t first_timestamp
Definition: hls.c:102
#define AV_LOG_INFO
Standard information.
Definition: avcodec.h:4158
int ff_check_interrupt(AVIOInterruptCB *cb)
Check if the user has requested to interrup a blocking function associated with cb.
Definition: avio.c:437
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avcodec.h:2290
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:938
int seek_flags
Definition: hls.c:104
static int hls_read_header(AVFormatContext *s)
Definition: hls.c:477
AVFormatContext * parent
Definition: hls.c:77
AVIOContext * pb
I/O context.
Definition: avformat.h:1001
void * buf
Definition: avisynth_c.h:594
Definition: url.h:41
static int read_packet(AVFormatContext *ctx, AVPacket *pkt)
Definition: libcdio.c:114
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:62
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:1838
void * priv_data
Definition: url.h:44
uint8_t * data
Definition: avcodec.h:1063
char key[MAX_URL_SIZE]
Definition: hls.c:61
#define snprintf
Definition: snprintf.h:34
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:3271
This structure contains the data a format has to probe a file.
Definition: avformat.h:334
int ff_hex_to_data(uint8_t *data, const char *p)
Parse a string of hexadecimal strings.
Definition: utils.c:3886
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1432
Round toward -infinity.
Definition: mathematics.h:70
AVDictionary * metadata
Definition: avformat.h:918
static void handle_variant_args(struct variant_info *info, const char *key, int key_len, char **dest, int *dest_len)
Definition: hls.c:176
KeyType
Definition: hls.c:53
static int flags
Definition: cpu.c:45
int ffurl_close(URLContext *h)
Definition: avio.c:368
#define AVERROR_EOF
static int recheck_discard_flags(AVFormatContext *s, int first)
Definition: hls.c:620
void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf, void *context)
Parse a string with comma-separated key=value pairs.
Definition: utils.c:3941
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:342
char iv[35]
Definition: hls.c:188
int url_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:280
int av_strstart(const char *str, const char *pfx, const char **ptr)
Return non-zero if pfx is a prefix of str.
Definition: avstring.c:33
char uri[MAX_URL_SIZE]
Definition: hls.c:186
#define INITIAL_BUFFER_SIZE
Definition: hls.c:39
int ffio_init_context(AVIOContext *s, unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Definition: aviobuf.c:71
int ffurl_open(URLContext **puc, const char *filename, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options)
Create an URLContext for accessing to the resource indicated by url, and open it. ...
Definition: avio.c:256
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: utils.c:2710
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
Definition: avformat.h:713
static int parse_playlist(HLSContext *c, const char *url, struct variant *var, AVIOContext *in)
Definition: hls.c:206
static double c[64]
int cur_seq_no
Definition: hls.c:99
int ffurl_read_complete(URLContext *h, unsigned char *buf, int size)
Read as many bytes as possible (up to size), calling the read function multiple times if necessary...
Definition: avio.c:319
Main libavformat public API header.
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:106
int stream_offset
Definition: hls.c:81
int64_t pos
position in the file of the current buffer
Definition: avio.h:94
int pts_wrap_bits
number of bits in pts (used for wrapping control)
Definition: avformat.h:784
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:49
int den
denominator
Definition: rational.h:45
int cur_seq_no
Definition: hls.c:89
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
Definition: utils.c:3309
static int hls_probe(AVProbeData *p)
Definition: hls.c:817
static int hls_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: hls.c:759
int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
Definition: opt.c:614
#define AVERROR_INVALIDDATA
int eof_reached
true if eof reached
Definition: avio.h:96
int len
#define AVERROR(e)
Definition: hls.c:71
int64_t dts
Decompression timestamp in AVStream-&gt;time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1062
int64_t duration
Decoding: duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1033
void INT64 start
Definition: avisynth_c.h:594
unbuffered private I/O API
uint8_t key[16]
Definition: hls.c:93
static AVPacket pkt
Definition: demuxing.c:52
int stream_index
Definition: avcodec.h:1065
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:703
AVPacket pkt
Definition: hls.c:80
int64_t duration
Definition: hls.c:59
static void free_variant_list(HLSContext *c)
Definition: hls.c:127
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:726
static int hls_close(AVFormatContext *s)
Definition: hls.c:751
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:3865
This structure stores compressed data.
Definition: avcodec.h:1040
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
Definition: opt.c:255
int ffurl_read(URLContext *h, unsigned char *buf, int size)
Read up to size bytes from the resource accessed by h, and store the read bytes in buf...
Definition: avio.c:312
Definition: hls.c:54
for(j=16;j >0;--j)
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avcodec.h:2278
void * av_mallocz(size_t size) av_malloc_attrib 1(1)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:241
static av_cold void cleanup(FlashSV2Context *s)
Definition: flashsv2enc.c:128
AVFormatContext * ctx
Definition: hls.c:79