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dashdec.c
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1 /*
2  * Dynamic Adaptive Streaming over HTTP demux
3  * Copyright (c) 2017 samsamsam@o2.pl based on HLS demux
4  * Copyright (c) 2017 Steven Liu
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 #include <libxml/parser.h>
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/opt.h"
25 #include "libavutil/time.h"
26 #include "libavutil/parseutils.h"
27 #include "internal.h"
28 #include "avio_internal.h"
29 #include "dash.h"
30 
31 #define INITIAL_BUFFER_SIZE 32768
32 
33 struct fragment {
34  int64_t url_offset;
35  int64_t size;
36  char *url;
37 };
38 
39 /*
40  * reference to : ISO_IEC_23009-1-DASH-2012
41  * Section: 5.3.9.6.2
42  * Table: Table 17 — Semantics of SegmentTimeline element
43  * */
44 struct timeline {
45  /* starttime: Element or Attribute Name
46  * specifies the MPD start time, in @timescale units,
47  * the first Segment in the series starts relative to the beginning of the Period.
48  * The value of this attribute must be equal to or greater than the sum of the previous S
49  * element earliest presentation time and the sum of the contiguous Segment durations.
50  * If the value of the attribute is greater than what is expressed by the previous S element,
51  * it expresses discontinuities in the timeline.
52  * If not present then the value shall be assumed to be zero for the first S element
53  * and for the subsequent S elements, the value shall be assumed to be the sum of
54  * the previous S element's earliest presentation time and contiguous duration
55  * (i.e. previous S@starttime + @duration * (@repeat + 1)).
56  * */
57  int64_t starttime;
58  /* repeat: Element or Attribute Name
59  * specifies the repeat count of the number of following contiguous Segments with
60  * the same duration expressed by the value of @duration. This value is zero-based
61  * (e.g. a value of three means four Segments in the contiguous series).
62  * */
63  int64_t repeat;
64  /* duration: Element or Attribute Name
65  * specifies the Segment duration, in units of the value of the @timescale.
66  * */
67  int64_t duration;
68 };
69 
70 /*
71  * Each playlist has its own demuxer. If it is currently active,
72  * it has an opened AVIOContext too, and potentially an AVPacket
73  * containing the next packet from this stream.
74  */
76  char *url_template;
82  int rep_idx;
83  int rep_count;
85 
87  char id[20];
88  int bandwidth;
90  AVStream *assoc_stream; /* demuxer stream associated with this representation */
91 
93  struct fragment **fragments; /* VOD list of fragment for profile */
94 
96  struct timeline **timelines;
97 
98  int64_t first_seq_no;
99  int64_t last_seq_no;
100  int64_t start_number; /* used in case when we have dynamic list of segment to know which segments are new one*/
101 
104 
106 
107  int64_t cur_seq_no;
108  int64_t cur_seg_offset;
109  int64_t cur_seg_size;
110  struct fragment *cur_seg;
111 
112  /* Currently active Media Initialization Section */
118  int64_t cur_timestamp;
120 };
121 
122 typedef struct DASHContext {
123  const AVClass *class;
124  char *base_url;
125 
126  int n_videos;
128  int n_audios;
130 
131  /* MediaPresentationDescription Attribute */
135  uint64_t publish_time;
138  uint64_t min_buffer_time;
139 
140  /* Period Attribute */
141  uint64_t period_duration;
142  uint64_t period_start;
143 
144  int is_live;
149 
150  /* Flags for init section*/
153 
154 } DASHContext;
155 
156 static int ishttp(char *url)
157 {
158  const char *proto_name = avio_find_protocol_name(url);
159  return av_strstart(proto_name, "http", NULL);
160 }
161 
162 static int aligned(int val)
163 {
164  return ((val + 0x3F) >> 6) << 6;
165 }
166 
167 static uint64_t get_current_time_in_sec(void)
168 {
169  return av_gettime() / 1000000;
170 }
171 
172 static uint64_t get_utc_date_time_insec(AVFormatContext *s, const char *datetime)
173 {
174  struct tm timeinfo;
175  int year = 0;
176  int month = 0;
177  int day = 0;
178  int hour = 0;
179  int minute = 0;
180  int ret = 0;
181  float second = 0.0;
182 
183  /* ISO-8601 date parser */
184  if (!datetime)
185  return 0;
186 
187  ret = sscanf(datetime, "%d-%d-%dT%d:%d:%fZ", &year, &month, &day, &hour, &minute, &second);
188  /* year, month, day, hour, minute, second 6 arguments */
189  if (ret != 6) {
190  av_log(s, AV_LOG_WARNING, "get_utc_date_time_insec get a wrong time format\n");
191  }
192  timeinfo.tm_year = year - 1900;
193  timeinfo.tm_mon = month - 1;
194  timeinfo.tm_mday = day;
195  timeinfo.tm_hour = hour;
196  timeinfo.tm_min = minute;
197  timeinfo.tm_sec = (int)second;
198 
199  return av_timegm(&timeinfo);
200 }
201 
202 static uint32_t get_duration_insec(AVFormatContext *s, const char *duration)
203 {
204  /* ISO-8601 duration parser */
205  uint32_t days = 0;
206  uint32_t hours = 0;
207  uint32_t mins = 0;
208  uint32_t secs = 0;
209  int size = 0;
210  float value = 0;
211  char type = '\0';
212  const char *ptr = duration;
213 
214  while (*ptr) {
215  if (*ptr == 'P' || *ptr == 'T') {
216  ptr++;
217  continue;
218  }
219 
220  if (sscanf(ptr, "%f%c%n", &value, &type, &size) != 2) {
221  av_log(s, AV_LOG_WARNING, "get_duration_insec get a wrong time format\n");
222  return 0; /* parser error */
223  }
224  switch (type) {
225  case 'D':
226  days = (uint32_t)value;
227  break;
228  case 'H':
229  hours = (uint32_t)value;
230  break;
231  case 'M':
232  mins = (uint32_t)value;
233  break;
234  case 'S':
235  secs = (uint32_t)value;
236  break;
237  default:
238  // handle invalid type
239  break;
240  }
241  ptr += size;
242  }
243  return ((days * 24 + hours) * 60 + mins) * 60 + secs;
244 }
245 
246 static int64_t get_segment_start_time_based_on_timeline(struct representation *pls, int64_t cur_seq_no)
247 {
248  int64_t start_time = 0;
249  int64_t i = 0;
250  int64_t j = 0;
251  int64_t num = 0;
252 
253  if (pls->n_timelines) {
254  for (i = 0; i < pls->n_timelines; i++) {
255  if (pls->timelines[i]->starttime > 0) {
256  start_time = pls->timelines[i]->starttime;
257  }
258  if (num == cur_seq_no)
259  goto finish;
260 
261  start_time += pls->timelines[i]->duration;
262 
263  if (pls->timelines[i]->repeat == -1) {
264  start_time = pls->timelines[i]->duration * cur_seq_no;
265  goto finish;
266  }
267 
268  for (j = 0; j < pls->timelines[i]->repeat; j++) {
269  num++;
270  if (num == cur_seq_no)
271  goto finish;
272  start_time += pls->timelines[i]->duration;
273  }
274  num++;
275  }
276  }
277 finish:
278  return start_time;
279 }
280 
281 static int64_t calc_next_seg_no_from_timelines(struct representation *pls, int64_t cur_time)
282 {
283  int64_t i = 0;
284  int64_t j = 0;
285  int64_t num = 0;
286  int64_t start_time = 0;
287 
288  for (i = 0; i < pls->n_timelines; i++) {
289  if (pls->timelines[i]->starttime > 0) {
290  start_time = pls->timelines[i]->starttime;
291  }
292  if (start_time > cur_time)
293  goto finish;
294 
295  start_time += pls->timelines[i]->duration;
296  for (j = 0; j < pls->timelines[i]->repeat; j++) {
297  num++;
298  if (start_time > cur_time)
299  goto finish;
300  start_time += pls->timelines[i]->duration;
301  }
302  num++;
303  }
304 
305  return -1;
306 
307 finish:
308  return num;
309 }
310 
311 static void free_fragment(struct fragment **seg)
312 {
313  if (!(*seg)) {
314  return;
315  }
316  av_freep(&(*seg)->url);
317  av_freep(seg);
318 }
319 
320 static void free_fragment_list(struct representation *pls)
321 {
322  int i;
323 
324  for (i = 0; i < pls->n_fragments; i++) {
325  free_fragment(&pls->fragments[i]);
326  }
327  av_freep(&pls->fragments);
328  pls->n_fragments = 0;
329 }
330 
331 static void free_timelines_list(struct representation *pls)
332 {
333  int i;
334 
335  for (i = 0; i < pls->n_timelines; i++) {
336  av_freep(&pls->timelines[i]);
337  }
338  av_freep(&pls->timelines);
339  pls->n_timelines = 0;
340 }
341 
342 static void free_representation(struct representation *pls)
343 {
344  free_fragment_list(pls);
345  free_timelines_list(pls);
346  free_fragment(&pls->cur_seg);
348  av_freep(&pls->init_sec_buf);
349  av_freep(&pls->pb.buffer);
350  if (pls->input)
351  ff_format_io_close(pls->parent, &pls->input);
352  if (pls->ctx) {
353  pls->ctx->pb = NULL;
354  avformat_close_input(&pls->ctx);
355  }
356 
357  av_freep(&pls->url_template);
358  av_freep(&pls);
359 }
360 
362 {
363  int i;
364  for (i = 0; i < c->n_videos; i++) {
365  struct representation *pls = c->videos[i];
366  free_representation(pls);
367  }
368  av_freep(&c->videos);
369  c->n_videos = 0;
370 }
371 
373 {
374  int i;
375  for (i = 0; i < c->n_audios; i++) {
376  struct representation *pls = c->audios[i];
377  free_representation(pls);
378  }
379  av_freep(&c->audios);
380  c->n_audios = 0;
381 }
382 
383 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
384  AVDictionary *opts, AVDictionary *opts2, int *is_http)
385 {
386  DASHContext *c = s->priv_data;
387  AVDictionary *tmp = NULL;
388  const char *proto_name = NULL;
389  int ret;
390 
391  av_dict_copy(&tmp, opts, 0);
392  av_dict_copy(&tmp, opts2, 0);
393 
394  if (av_strstart(url, "crypto", NULL)) {
395  if (url[6] == '+' || url[6] == ':')
396  proto_name = avio_find_protocol_name(url + 7);
397  }
398 
399  if (!proto_name)
400  proto_name = avio_find_protocol_name(url);
401 
402  if (!proto_name)
403  return AVERROR_INVALIDDATA;
404 
405  // only http(s) & file are allowed
406  if (av_strstart(proto_name, "file", NULL)) {
407  if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
408  av_log(s, AV_LOG_ERROR,
409  "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
410  "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
411  url);
412  return AVERROR_INVALIDDATA;
413  }
414  } else if (av_strstart(proto_name, "http", NULL)) {
415  ;
416  } else
417  return AVERROR_INVALIDDATA;
418 
419  if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
420  ;
421  else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
422  ;
423  else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
424  return AVERROR_INVALIDDATA;
425 
426  av_freep(pb);
427  ret = avio_open2(pb, url, AVIO_FLAG_READ, c->interrupt_callback, &tmp);
428  if (ret >= 0) {
429  // update cookies on http response with setcookies.
430  char *new_cookies = NULL;
431 
432  if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
433  av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
434 
435  if (new_cookies) {
436  av_dict_set(&opts, "cookies", new_cookies, AV_DICT_DONT_STRDUP_VAL);
437  }
438 
439  }
440 
441  av_dict_free(&tmp);
442 
443  if (is_http)
444  *is_http = av_strstart(proto_name, "http", NULL);
445 
446  return ret;
447 }
448 
449 static char *get_content_url(xmlNodePtr *baseurl_nodes,
450  int n_baseurl_nodes,
451  int max_url_size,
452  char *rep_id_val,
453  char *rep_bandwidth_val,
454  char *val)
455 {
456  int i;
457  char *text;
458  char *url = NULL;
459  char *tmp_str = av_mallocz(max_url_size);
460  char *tmp_str_2 = av_mallocz(max_url_size);
461 
462  if (!tmp_str || !tmp_str_2) {
463  return NULL;
464  }
465 
466  for (i = 0; i < n_baseurl_nodes; ++i) {
467  if (baseurl_nodes[i] &&
468  baseurl_nodes[i]->children &&
469  baseurl_nodes[i]->children->type == XML_TEXT_NODE) {
470  text = xmlNodeGetContent(baseurl_nodes[i]->children);
471  if (text) {
472  memset(tmp_str, 0, max_url_size);
473  memset(tmp_str_2, 0, max_url_size);
474  ff_make_absolute_url(tmp_str_2, max_url_size, tmp_str, text);
475  av_strlcpy(tmp_str, tmp_str_2, max_url_size);
476  xmlFree(text);
477  }
478  }
479  }
480 
481  if (val)
482  av_strlcat(tmp_str, (const char*)val, max_url_size);
483 
484  if (rep_id_val) {
485  url = av_strireplace(tmp_str, "$RepresentationID$", (const char*)rep_id_val);
486  if (!url) {
487  goto end;
488  }
489  av_strlcpy(tmp_str, url, max_url_size);
490  }
491  if (rep_bandwidth_val && tmp_str[0] != '\0') {
492  // free any previously assigned url before reassigning
493  av_free(url);
494  url = av_strireplace(tmp_str, "$Bandwidth$", (const char*)rep_bandwidth_val);
495  if (!url) {
496  goto end;
497  }
498  }
499 end:
500  av_free(tmp_str);
501  av_free(tmp_str_2);
502  return url;
503 }
504 
505 static char *get_val_from_nodes_tab(xmlNodePtr *nodes, const int n_nodes, const char *attrname)
506 {
507  int i;
508  char *val;
509 
510  for (i = 0; i < n_nodes; ++i) {
511  if (nodes[i]) {
512  val = xmlGetProp(nodes[i], attrname);
513  if (val)
514  return val;
515  }
516  }
517 
518  return NULL;
519 }
520 
521 static xmlNodePtr find_child_node_by_name(xmlNodePtr rootnode, const char *nodename)
522 {
523  xmlNodePtr node = rootnode;
524  if (!node) {
525  return NULL;
526  }
527 
528  node = xmlFirstElementChild(node);
529  while (node) {
530  if (!av_strcasecmp(node->name, nodename)) {
531  return node;
532  }
533  node = xmlNextElementSibling(node);
534  }
535  return NULL;
536 }
537 
538 static enum AVMediaType get_content_type(xmlNodePtr node)
539 {
541  int i = 0;
542  const char *attr;
543  char *val = NULL;
544 
545  if (node) {
546  for (i = 0; i < 2; i++) {
547  attr = i ? "mimeType" : "contentType";
548  val = xmlGetProp(node, attr);
549  if (val) {
550  if (av_stristr((const char *)val, "video")) {
551  type = AVMEDIA_TYPE_VIDEO;
552  } else if (av_stristr((const char *)val, "audio")) {
553  type = AVMEDIA_TYPE_AUDIO;
554  }
555  xmlFree(val);
556  }
557  }
558  }
559  return type;
560 }
561 
562 static struct fragment * get_Fragment(char *range)
563 {
564  struct fragment * seg = av_mallocz(sizeof(struct fragment));
565 
566  if (!seg)
567  return NULL;
568 
569  seg->size = -1;
570  if (range) {
571  char *str_end_offset;
572  char *str_offset = av_strtok(range, "-", &str_end_offset);
573  seg->url_offset = strtoll(str_offset, NULL, 10);
574  seg->size = strtoll(str_end_offset, NULL, 10) - seg->url_offset;
575  }
576 
577  return seg;
578 }
579 
581  xmlNodePtr fragmenturl_node,
582  xmlNodePtr *baseurl_nodes,
583  char *rep_id_val,
584  char *rep_bandwidth_val)
585 {
586  DASHContext *c = s->priv_data;
587  char *initialization_val = NULL;
588  char *media_val = NULL;
589  char *range_val = NULL;
590  int max_url_size = c ? c->max_url_size: MAX_URL_SIZE;
591 
592  if (!av_strcasecmp(fragmenturl_node->name, (const char *)"Initialization")) {
593  initialization_val = xmlGetProp(fragmenturl_node, "sourceURL");
594  range_val = xmlGetProp(fragmenturl_node, "range");
595  if (initialization_val || range_val) {
596  rep->init_section = get_Fragment(range_val);
597  if (!rep->init_section) {
598  xmlFree(initialization_val);
599  xmlFree(range_val);
600  return AVERROR(ENOMEM);
601  }
602  rep->init_section->url = get_content_url(baseurl_nodes, 4,
603  max_url_size,
604  rep_id_val,
605  rep_bandwidth_val,
606  initialization_val);
607 
608  if (!rep->init_section->url) {
609  av_free(rep->init_section);
610  xmlFree(initialization_val);
611  xmlFree(range_val);
612  return AVERROR(ENOMEM);
613  }
614  xmlFree(initialization_val);
615  xmlFree(range_val);
616  }
617  } else if (!av_strcasecmp(fragmenturl_node->name, (const char *)"SegmentURL")) {
618  media_val = xmlGetProp(fragmenturl_node, "media");
619  range_val = xmlGetProp(fragmenturl_node, "mediaRange");
620  if (media_val || range_val) {
621  struct fragment *seg = get_Fragment(range_val);
622  if (!seg) {
623  xmlFree(media_val);
624  xmlFree(range_val);
625  return AVERROR(ENOMEM);
626  }
627  seg->url = get_content_url(baseurl_nodes, 4,
628  max_url_size,
629  rep_id_val,
630  rep_bandwidth_val,
631  media_val);
632  if (!seg->url) {
633  av_free(seg);
634  xmlFree(media_val);
635  xmlFree(range_val);
636  return AVERROR(ENOMEM);
637  }
638  dynarray_add(&rep->fragments, &rep->n_fragments, seg);
639  xmlFree(media_val);
640  xmlFree(range_val);
641  }
642  }
643 
644  return 0;
645 }
646 
648  xmlNodePtr fragment_timeline_node)
649 {
650  xmlAttrPtr attr = NULL;
651  char *val = NULL;
652 
653  if (!av_strcasecmp(fragment_timeline_node->name, (const char *)"S")) {
654  struct timeline *tml = av_mallocz(sizeof(struct timeline));
655  if (!tml) {
656  return AVERROR(ENOMEM);
657  }
658  attr = fragment_timeline_node->properties;
659  while (attr) {
660  val = xmlGetProp(fragment_timeline_node, attr->name);
661 
662  if (!val) {
663  av_log(s, AV_LOG_WARNING, "parse_manifest_segmenttimeline attr->name = %s val is NULL\n", attr->name);
664  continue;
665  }
666 
667  if (!av_strcasecmp(attr->name, (const char *)"t")) {
668  tml->starttime = (int64_t)strtoll(val, NULL, 10);
669  } else if (!av_strcasecmp(attr->name, (const char *)"r")) {
670  tml->repeat =(int64_t) strtoll(val, NULL, 10);
671  } else if (!av_strcasecmp(attr->name, (const char *)"d")) {
672  tml->duration = (int64_t)strtoll(val, NULL, 10);
673  }
674  attr = attr->next;
675  xmlFree(val);
676  }
677  dynarray_add(&rep->timelines, &rep->n_timelines, tml);
678  }
679 
680  return 0;
681 }
682 
683 static int resolve_content_path(AVFormatContext *s, const char *url, int *max_url_size, xmlNodePtr *baseurl_nodes, int n_baseurl_nodes) {
684 
685  char *tmp_str = NULL;
686  char *path = NULL;
687  char *mpdName = NULL;
688  xmlNodePtr node = NULL;
689  char *baseurl = NULL;
690  char *root_url = NULL;
691  char *text = NULL;
692  char *tmp = NULL;
693 
694  int isRootHttp = 0;
695  char token ='/';
696  int start = 0;
697  int rootId = 0;
698  int updated = 0;
699  int size = 0;
700  int i;
701  int tmp_max_url_size = strlen(url);
702 
703  for (i = n_baseurl_nodes-1; i >= 0 ; i--) {
704  text = xmlNodeGetContent(baseurl_nodes[i]);
705  if (!text)
706  continue;
707  tmp_max_url_size += strlen(text);
708  if (ishttp(text)) {
709  xmlFree(text);
710  break;
711  }
712  xmlFree(text);
713  }
714 
715  tmp_max_url_size = aligned(tmp_max_url_size);
716  text = av_mallocz(tmp_max_url_size);
717  if (!text) {
718  updated = AVERROR(ENOMEM);
719  goto end;
720  }
721  av_strlcpy(text, url, strlen(url)+1);
722  tmp = text;
723  while (mpdName = av_strtok(tmp, "/", &tmp)) {
724  size = strlen(mpdName);
725  }
726  av_free(text);
727 
728  path = av_mallocz(tmp_max_url_size);
729  tmp_str = av_mallocz(tmp_max_url_size);
730  if (!tmp_str || !path) {
731  updated = AVERROR(ENOMEM);
732  goto end;
733  }
734 
735  av_strlcpy (path, url, strlen(url) - size + 1);
736  for (rootId = n_baseurl_nodes - 1; rootId > 0; rootId --) {
737  if (!(node = baseurl_nodes[rootId])) {
738  continue;
739  }
740  text = xmlNodeGetContent(node);
741  if (ishttp(text)) {
742  xmlFree(text);
743  break;
744  }
745  xmlFree(text);
746  }
747 
748  node = baseurl_nodes[rootId];
749  baseurl = xmlNodeGetContent(node);
750  root_url = (av_strcasecmp(baseurl, "")) ? baseurl : path;
751  if (node) {
752  xmlNodeSetContent(node, root_url);
753  updated = 1;
754  }
755 
756  size = strlen(root_url);
757  isRootHttp = ishttp(root_url);
758 
759  if (root_url[size - 1] != token) {
760  av_strlcat(root_url, "/", size + 2);
761  size += 2;
762  }
763 
764  for (i = 0; i < n_baseurl_nodes; ++i) {
765  if (i == rootId) {
766  continue;
767  }
768  text = xmlNodeGetContent(baseurl_nodes[i]);
769  if (text) {
770  memset(tmp_str, 0, strlen(tmp_str));
771  if (!ishttp(text) && isRootHttp) {
772  av_strlcpy(tmp_str, root_url, size + 1);
773  }
774  start = (text[0] == token);
775  av_strlcat(tmp_str, text + start, tmp_max_url_size);
776  xmlNodeSetContent(baseurl_nodes[i], tmp_str);
777  updated = 1;
778  xmlFree(text);
779  }
780  }
781 
782 end:
783  if (tmp_max_url_size > *max_url_size) {
784  *max_url_size = tmp_max_url_size;
785  }
786  av_free(path);
787  av_free(tmp_str);
788  xmlFree(baseurl);
789  return updated;
790 
791 }
792 
793 static int parse_manifest_representation(AVFormatContext *s, const char *url,
794  xmlNodePtr node,
795  xmlNodePtr adaptionset_node,
796  xmlNodePtr mpd_baseurl_node,
797  xmlNodePtr period_baseurl_node,
798  xmlNodePtr period_segmenttemplate_node,
799  xmlNodePtr period_segmentlist_node,
800  xmlNodePtr fragment_template_node,
801  xmlNodePtr content_component_node,
802  xmlNodePtr adaptionset_baseurl_node,
803  xmlNodePtr adaptionset_segmentlist_node,
804  xmlNodePtr adaptionset_supplementalproperty_node)
805 {
806  int32_t ret = 0;
807  int32_t audio_rep_idx = 0;
808  int32_t video_rep_idx = 0;
809  DASHContext *c = s->priv_data;
810  struct representation *rep = NULL;
811  struct fragment *seg = NULL;
812  xmlNodePtr representation_segmenttemplate_node = NULL;
813  xmlNodePtr representation_baseurl_node = NULL;
814  xmlNodePtr representation_segmentlist_node = NULL;
815  xmlNodePtr segmentlists_tab[2];
816  xmlNodePtr fragment_timeline_node = NULL;
817  xmlNodePtr fragment_templates_tab[5];
818  char *duration_val = NULL;
819  char *presentation_timeoffset_val = NULL;
820  char *startnumber_val = NULL;
821  char *timescale_val = NULL;
822  char *initialization_val = NULL;
823  char *media_val = NULL;
824  char *val = NULL;
825  xmlNodePtr baseurl_nodes[4];
826  xmlNodePtr representation_node = node;
827  char *rep_id_val = xmlGetProp(representation_node, "id");
828  char *rep_bandwidth_val = xmlGetProp(representation_node, "bandwidth");
829  char *rep_framerate_val = xmlGetProp(representation_node, "frameRate");
831 
832  // try get information from representation
833  if (type == AVMEDIA_TYPE_UNKNOWN)
834  type = get_content_type(representation_node);
835  // try get information from contentComponen
836  if (type == AVMEDIA_TYPE_UNKNOWN)
837  type = get_content_type(content_component_node);
838  // try get information from adaption set
839  if (type == AVMEDIA_TYPE_UNKNOWN)
840  type = get_content_type(adaptionset_node);
841  if (type == AVMEDIA_TYPE_UNKNOWN) {
842  av_log(s, AV_LOG_VERBOSE, "Parsing '%s' - skipp not supported representation type\n", url);
843  } else if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO) {
844  // convert selected representation to our internal struct
845  rep = av_mallocz(sizeof(struct representation));
846  if (!rep) {
847  ret = AVERROR(ENOMEM);
848  goto end;
849  }
850  representation_segmenttemplate_node = find_child_node_by_name(representation_node, "SegmentTemplate");
851  representation_baseurl_node = find_child_node_by_name(representation_node, "BaseURL");
852  representation_segmentlist_node = find_child_node_by_name(representation_node, "SegmentList");
853 
854  baseurl_nodes[0] = mpd_baseurl_node;
855  baseurl_nodes[1] = period_baseurl_node;
856  baseurl_nodes[2] = adaptionset_baseurl_node;
857  baseurl_nodes[3] = representation_baseurl_node;
858 
859  ret = resolve_content_path(s, url, &c->max_url_size, baseurl_nodes, 4);
861  + (rep_id_val ? strlen(rep_id_val) : 0)
862  + (rep_bandwidth_val ? strlen(rep_bandwidth_val) : 0));
863  if (ret == AVERROR(ENOMEM) || ret == 0) {
864  goto end;
865  }
866  if (representation_segmenttemplate_node || fragment_template_node || period_segmenttemplate_node) {
867  fragment_timeline_node = NULL;
868  fragment_templates_tab[0] = representation_segmenttemplate_node;
869  fragment_templates_tab[1] = adaptionset_segmentlist_node;
870  fragment_templates_tab[2] = fragment_template_node;
871  fragment_templates_tab[3] = period_segmenttemplate_node;
872  fragment_templates_tab[4] = period_segmentlist_node;
873 
874  presentation_timeoffset_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "presentationTimeOffset");
875  duration_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "duration");
876  startnumber_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "startNumber");
877  timescale_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "timescale");
878  initialization_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "initialization");
879  media_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "media");
880 
881  if (initialization_val) {
882  rep->init_section = av_mallocz(sizeof(struct fragment));
883  if (!rep->init_section) {
884  av_free(rep);
885  ret = AVERROR(ENOMEM);
886  goto end;
887  }
888  c->max_url_size = aligned(c->max_url_size + strlen(initialization_val));
889  rep->init_section->url = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, initialization_val);
890  if (!rep->init_section->url) {
891  av_free(rep->init_section);
892  av_free(rep);
893  ret = AVERROR(ENOMEM);
894  goto end;
895  }
896  rep->init_section->size = -1;
897  xmlFree(initialization_val);
898  }
899 
900  if (media_val) {
901  c->max_url_size = aligned(c->max_url_size + strlen(media_val));
902  rep->url_template = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, media_val);
903  xmlFree(media_val);
904  }
905 
906  if (presentation_timeoffset_val) {
907  rep->presentation_timeoffset = (int64_t) strtoll(presentation_timeoffset_val, NULL, 10);
908  xmlFree(presentation_timeoffset_val);
909  }
910  if (duration_val) {
911  rep->fragment_duration = (int64_t) strtoll(duration_val, NULL, 10);
912  xmlFree(duration_val);
913  }
914  if (timescale_val) {
915  rep->fragment_timescale = (int64_t) strtoll(timescale_val, NULL, 10);
916  xmlFree(timescale_val);
917  }
918  if (startnumber_val) {
919  rep->first_seq_no = (int64_t) strtoll(startnumber_val, NULL, 10);
920  xmlFree(startnumber_val);
921  }
922  if (adaptionset_supplementalproperty_node) {
923  if (!av_strcasecmp(xmlGetProp(adaptionset_supplementalproperty_node,"schemeIdUri"), "http://dashif.org/guidelines/last-segment-number")) {
924  val = xmlGetProp(adaptionset_supplementalproperty_node,"value");
925  if (!val) {
926  av_log(s, AV_LOG_ERROR, "Missing value attribute in adaptionset_supplementalproperty_node\n");
927  } else {
928  rep->last_seq_no =(int64_t) strtoll(val, NULL, 10) - 1;
929  xmlFree(val);
930  }
931  }
932  }
933 
934  fragment_timeline_node = find_child_node_by_name(representation_segmenttemplate_node, "SegmentTimeline");
935 
936  if (!fragment_timeline_node)
937  fragment_timeline_node = find_child_node_by_name(fragment_template_node, "SegmentTimeline");
938  if (!fragment_timeline_node)
939  fragment_timeline_node = find_child_node_by_name(adaptionset_segmentlist_node, "SegmentTimeline");
940  if (!fragment_timeline_node)
941  fragment_timeline_node = find_child_node_by_name(period_segmentlist_node, "SegmentTimeline");
942  if (fragment_timeline_node) {
943  fragment_timeline_node = xmlFirstElementChild(fragment_timeline_node);
944  while (fragment_timeline_node) {
945  ret = parse_manifest_segmenttimeline(s, rep, fragment_timeline_node);
946  if (ret < 0) {
947  return ret;
948  }
949  fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
950  }
951  }
952  } else if (representation_baseurl_node && !representation_segmentlist_node) {
953  seg = av_mallocz(sizeof(struct fragment));
954  if (!seg) {
955  ret = AVERROR(ENOMEM);
956  goto end;
957  }
958  seg->url = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, NULL);
959  if (!seg->url) {
960  av_free(seg);
961  ret = AVERROR(ENOMEM);
962  goto end;
963  }
964  seg->size = -1;
965  dynarray_add(&rep->fragments, &rep->n_fragments, seg);
966  } else if (representation_segmentlist_node) {
967  // TODO: https://www.brendanlong.com/the-structure-of-an-mpeg-dash-mpd.html
968  // http://www-itec.uni-klu.ac.at/dash/ddash/mpdGenerator.php?fragmentlength=15&type=full
969  xmlNodePtr fragmenturl_node = NULL;
970  segmentlists_tab[0] = representation_segmentlist_node;
971  segmentlists_tab[1] = adaptionset_segmentlist_node;
972 
973  duration_val = get_val_from_nodes_tab(segmentlists_tab, 2, "duration");
974  timescale_val = get_val_from_nodes_tab(segmentlists_tab, 2, "timescale");
975  if (duration_val) {
976  rep->fragment_duration = (int64_t) strtoll(duration_val, NULL, 10);
977  xmlFree(duration_val);
978  }
979  if (timescale_val) {
980  rep->fragment_timescale = (int64_t) strtoll(timescale_val, NULL, 10);
981  xmlFree(timescale_val);
982  }
983  fragmenturl_node = xmlFirstElementChild(representation_segmentlist_node);
984  while (fragmenturl_node) {
985  ret = parse_manifest_segmenturlnode(s, rep, fragmenturl_node,
986  baseurl_nodes,
987  rep_id_val,
988  rep_bandwidth_val);
989  if (ret < 0) {
990  return ret;
991  }
992  fragmenturl_node = xmlNextElementSibling(fragmenturl_node);
993  }
994 
995  fragment_timeline_node = find_child_node_by_name(representation_segmenttemplate_node, "SegmentTimeline");
996 
997  if (!fragment_timeline_node)
998  fragment_timeline_node = find_child_node_by_name(fragment_template_node, "SegmentTimeline");
999  if (!fragment_timeline_node)
1000  fragment_timeline_node = find_child_node_by_name(adaptionset_segmentlist_node, "SegmentTimeline");
1001  if (!fragment_timeline_node)
1002  fragment_timeline_node = find_child_node_by_name(period_segmentlist_node, "SegmentTimeline");
1003  if (fragment_timeline_node) {
1004  fragment_timeline_node = xmlFirstElementChild(fragment_timeline_node);
1005  while (fragment_timeline_node) {
1006  ret = parse_manifest_segmenttimeline(s, rep, fragment_timeline_node);
1007  if (ret < 0) {
1008  return ret;
1009  }
1010  fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
1011  }
1012  }
1013  } else {
1014  free_representation(rep);
1015  rep = NULL;
1016  av_log(s, AV_LOG_ERROR, "Unknown format of Representation node id[%s] \n", (const char *)rep_id_val);
1017  }
1018 
1019  if (rep) {
1020  if (rep->fragment_duration > 0 && !rep->fragment_timescale)
1021  rep->fragment_timescale = 1;
1022  rep->bandwidth = rep_bandwidth_val ? atoi(rep_bandwidth_val) : 0;
1023  strncpy(rep->id, rep_id_val ? rep_id_val : "", sizeof(rep->id));
1024  rep->framerate = av_make_q(0, 0);
1025  if (type == AVMEDIA_TYPE_VIDEO && rep_framerate_val) {
1026  ret = av_parse_video_rate(&rep->framerate, rep_framerate_val);
1027  if (ret < 0)
1028  av_log(s, AV_LOG_VERBOSE, "Ignoring invalid frame rate '%s'\n", rep_framerate_val);
1029  }
1030 
1031  if (type == AVMEDIA_TYPE_VIDEO) {
1032  rep->rep_idx = video_rep_idx;
1033  dynarray_add(&c->videos, &c->n_videos, rep);
1034  } else {
1035  rep->rep_idx = audio_rep_idx;
1036  dynarray_add(&c->audios, &c->n_audios, rep);
1037  }
1038  }
1039  }
1040 
1041  video_rep_idx += type == AVMEDIA_TYPE_VIDEO;
1042  audio_rep_idx += type == AVMEDIA_TYPE_AUDIO;
1043 
1044 end:
1045  if (rep_id_val)
1046  xmlFree(rep_id_val);
1047  if (rep_bandwidth_val)
1048  xmlFree(rep_bandwidth_val);
1049  if (rep_framerate_val)
1050  xmlFree(rep_framerate_val);
1051 
1052  return ret;
1053 }
1054 
1056  xmlNodePtr adaptionset_node,
1057  xmlNodePtr mpd_baseurl_node,
1058  xmlNodePtr period_baseurl_node,
1059  xmlNodePtr period_segmenttemplate_node,
1060  xmlNodePtr period_segmentlist_node)
1061 {
1062  int ret = 0;
1063  xmlNodePtr fragment_template_node = NULL;
1064  xmlNodePtr content_component_node = NULL;
1065  xmlNodePtr adaptionset_baseurl_node = NULL;
1066  xmlNodePtr adaptionset_segmentlist_node = NULL;
1067  xmlNodePtr adaptionset_supplementalproperty_node = NULL;
1068  xmlNodePtr node = NULL;
1069 
1070  node = xmlFirstElementChild(adaptionset_node);
1071  while (node) {
1072  if (!av_strcasecmp(node->name, (const char *)"SegmentTemplate")) {
1073  fragment_template_node = node;
1074  } else if (!av_strcasecmp(node->name, (const char *)"ContentComponent")) {
1075  content_component_node = node;
1076  } else if (!av_strcasecmp(node->name, (const char *)"BaseURL")) {
1077  adaptionset_baseurl_node = node;
1078  } else if (!av_strcasecmp(node->name, (const char *)"SegmentList")) {
1079  adaptionset_segmentlist_node = node;
1080  } else if (!av_strcasecmp(node->name, (const char *)"SupplementalProperty")) {
1081  adaptionset_supplementalproperty_node = node;
1082  } else if (!av_strcasecmp(node->name, (const char *)"Representation")) {
1083  ret = parse_manifest_representation(s, url, node,
1084  adaptionset_node,
1085  mpd_baseurl_node,
1086  period_baseurl_node,
1087  period_segmenttemplate_node,
1088  period_segmentlist_node,
1089  fragment_template_node,
1090  content_component_node,
1091  adaptionset_baseurl_node,
1092  adaptionset_segmentlist_node,
1093  adaptionset_supplementalproperty_node);
1094  if (ret < 0) {
1095  return ret;
1096  }
1097  }
1098  node = xmlNextElementSibling(node);
1099  }
1100  return 0;
1101 }
1102 
1103 static int parse_manifest(AVFormatContext *s, const char *url, AVIOContext *in)
1104 {
1105  DASHContext *c = s->priv_data;
1106  int ret = 0;
1107  int close_in = 0;
1108  uint8_t *new_url = NULL;
1109  int64_t filesize = 0;
1110  char *buffer = NULL;
1111  AVDictionary *opts = NULL;
1112  xmlDoc *doc = NULL;
1113  xmlNodePtr root_element = NULL;
1114  xmlNodePtr node = NULL;
1115  xmlNodePtr period_node = NULL;
1116  xmlNodePtr tmp_node = NULL;
1117  xmlNodePtr mpd_baseurl_node = NULL;
1118  xmlNodePtr period_baseurl_node = NULL;
1119  xmlNodePtr period_segmenttemplate_node = NULL;
1120  xmlNodePtr period_segmentlist_node = NULL;
1121  xmlNodePtr adaptionset_node = NULL;
1122  xmlAttrPtr attr = NULL;
1123  char *val = NULL;
1124  uint32_t period_duration_sec = 0;
1125  uint32_t period_start_sec = 0;
1126 
1127  if (!in) {
1128  close_in = 1;
1129 
1130  av_dict_copy(&opts, c->avio_opts, 0);
1131  ret = avio_open2(&in, url, AVIO_FLAG_READ, c->interrupt_callback, &opts);
1132  av_dict_free(&opts);
1133  if (ret < 0)
1134  return ret;
1135  }
1136 
1137  if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0) {
1138  c->base_url = av_strdup(new_url);
1139  } else {
1140  c->base_url = av_strdup(url);
1141  }
1142 
1143  filesize = avio_size(in);
1144  if (filesize <= 0) {
1145  filesize = 8 * 1024;
1146  }
1147 
1148  buffer = av_mallocz(filesize);
1149  if (!buffer) {
1150  av_free(c->base_url);
1151  return AVERROR(ENOMEM);
1152  }
1153 
1154  filesize = avio_read(in, buffer, filesize);
1155  if (filesize <= 0) {
1156  av_log(s, AV_LOG_ERROR, "Unable to read to offset '%s'\n", url);
1157  ret = AVERROR_INVALIDDATA;
1158  } else {
1159  LIBXML_TEST_VERSION
1160 
1161  doc = xmlReadMemory(buffer, filesize, c->base_url, NULL, 0);
1162  root_element = xmlDocGetRootElement(doc);
1163  node = root_element;
1164 
1165  if (!node) {
1166  ret = AVERROR_INVALIDDATA;
1167  av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing root node\n", url);
1168  goto cleanup;
1169  }
1170 
1171  if (node->type != XML_ELEMENT_NODE ||
1172  av_strcasecmp(node->name, (const char *)"MPD")) {
1173  ret = AVERROR_INVALIDDATA;
1174  av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - wrong root node name[%s] type[%d]\n", url, node->name, (int)node->type);
1175  goto cleanup;
1176  }
1177 
1178  val = xmlGetProp(node, "type");
1179  if (!val) {
1180  av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing type attrib\n", url);
1181  ret = AVERROR_INVALIDDATA;
1182  goto cleanup;
1183  }
1184  if (!av_strcasecmp(val, (const char *)"dynamic"))
1185  c->is_live = 1;
1186  xmlFree(val);
1187 
1188  attr = node->properties;
1189  while (attr) {
1190  val = xmlGetProp(node, attr->name);
1191 
1192  if (!av_strcasecmp(attr->name, (const char *)"availabilityStartTime")) {
1193  c->availability_start_time = get_utc_date_time_insec(s, (const char *)val);
1194  } else if (!av_strcasecmp(attr->name, (const char *)"publishTime")) {
1195  c->publish_time = get_utc_date_time_insec(s, (const char *)val);
1196  } else if (!av_strcasecmp(attr->name, (const char *)"minimumUpdatePeriod")) {
1197  c->minimum_update_period = get_duration_insec(s, (const char *)val);
1198  } else if (!av_strcasecmp(attr->name, (const char *)"timeShiftBufferDepth")) {
1199  c->time_shift_buffer_depth = get_duration_insec(s, (const char *)val);
1200  } else if (!av_strcasecmp(attr->name, (const char *)"minBufferTime")) {
1201  c->min_buffer_time = get_duration_insec(s, (const char *)val);
1202  } else if (!av_strcasecmp(attr->name, (const char *)"suggestedPresentationDelay")) {
1203  c->suggested_presentation_delay = get_duration_insec(s, (const char *)val);
1204  } else if (!av_strcasecmp(attr->name, (const char *)"mediaPresentationDuration")) {
1205  c->media_presentation_duration = get_duration_insec(s, (const char *)val);
1206  }
1207  attr = attr->next;
1208  xmlFree(val);
1209  }
1210 
1211  tmp_node = find_child_node_by_name(node, "BaseURL");
1212  if (tmp_node) {
1213  mpd_baseurl_node = xmlCopyNode(tmp_node,1);
1214  } else {
1215  mpd_baseurl_node = xmlNewNode(NULL, "BaseURL");
1216  }
1217 
1218  // at now we can handle only one period, with the longest duration
1219  node = xmlFirstElementChild(node);
1220  while (node) {
1221  if (!av_strcasecmp(node->name, (const char *)"Period")) {
1222  period_duration_sec = 0;
1223  period_start_sec = 0;
1224  attr = node->properties;
1225  while (attr) {
1226  val = xmlGetProp(node, attr->name);
1227  if (!av_strcasecmp(attr->name, (const char *)"duration")) {
1228  period_duration_sec = get_duration_insec(s, (const char *)val);
1229  } else if (!av_strcasecmp(attr->name, (const char *)"start")) {
1230  period_start_sec = get_duration_insec(s, (const char *)val);
1231  }
1232  attr = attr->next;
1233  xmlFree(val);
1234  }
1235  if ((period_duration_sec) >= (c->period_duration)) {
1236  period_node = node;
1237  c->period_duration = period_duration_sec;
1238  c->period_start = period_start_sec;
1239  if (c->period_start > 0)
1241  }
1242  }
1243  node = xmlNextElementSibling(node);
1244  }
1245  if (!period_node) {
1246  av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing Period node\n", url);
1247  ret = AVERROR_INVALIDDATA;
1248  goto cleanup;
1249  }
1250 
1251  adaptionset_node = xmlFirstElementChild(period_node);
1252  while (adaptionset_node) {
1253  if (!av_strcasecmp(adaptionset_node->name, (const char *)"BaseURL")) {
1254  period_baseurl_node = adaptionset_node;
1255  } else if (!av_strcasecmp(adaptionset_node->name, (const char *)"SegmentTemplate")) {
1256  period_segmenttemplate_node = adaptionset_node;
1257  } else if (!av_strcasecmp(adaptionset_node->name, (const char *)"SegmentList")) {
1258  period_segmentlist_node = adaptionset_node;
1259  } else if (!av_strcasecmp(adaptionset_node->name, (const char *)"AdaptationSet")) {
1260  parse_manifest_adaptationset(s, url, adaptionset_node, mpd_baseurl_node, period_baseurl_node, period_segmenttemplate_node, period_segmentlist_node);
1261  }
1262  adaptionset_node = xmlNextElementSibling(adaptionset_node);
1263  }
1264 cleanup:
1265  /*free the document */
1266  xmlFreeDoc(doc);
1267  xmlCleanupParser();
1268  xmlFreeNode(mpd_baseurl_node);
1269  }
1270 
1271  av_free(new_url);
1272  av_free(buffer);
1273  if (close_in) {
1274  avio_close(in);
1275  }
1276  return ret;
1277 }
1278 
1279 static int64_t calc_cur_seg_no(AVFormatContext *s, struct representation *pls)
1280 {
1281  DASHContext *c = s->priv_data;
1282  int64_t num = 0;
1283  int64_t start_time_offset = 0;
1284 
1285  if (c->is_live) {
1286  if (pls->n_fragments) {
1287  num = pls->first_seq_no;
1288  } else if (pls->n_timelines) {
1289  start_time_offset = get_segment_start_time_based_on_timeline(pls, 0xFFFFFFFF) - 60 * pls->fragment_timescale; // 60 seconds before end
1290  num = calc_next_seg_no_from_timelines(pls, start_time_offset);
1291  if (num == -1)
1292  num = pls->first_seq_no;
1293  else
1294  num += pls->first_seq_no;
1295  } else if (pls->fragment_duration){
1296  if (pls->presentation_timeoffset) {
1298  } else if (c->publish_time > 0 && !c->availability_start_time) {
1300  } else {
1302  }
1303  }
1304  } else {
1305  num = pls->first_seq_no;
1306  }
1307  return num;
1308 }
1309 
1310 static int64_t calc_min_seg_no(AVFormatContext *s, struct representation *pls)
1311 {
1312  DASHContext *c = s->priv_data;
1313  int64_t num = 0;
1314 
1315  if (c->is_live && pls->fragment_duration) {
1317  } else {
1318  num = pls->first_seq_no;
1319  }
1320  return num;
1321 }
1322 
1323 static int64_t calc_max_seg_no(struct representation *pls, DASHContext *c)
1324 {
1325  int64_t num = 0;
1326 
1327  if (pls->n_fragments) {
1328  num = pls->first_seq_no + pls->n_fragments - 1;
1329  } else if (pls->n_timelines) {
1330  int i = 0;
1331  num = pls->first_seq_no + pls->n_timelines - 1;
1332  for (i = 0; i < pls->n_timelines; i++) {
1333  if (pls->timelines[i]->repeat == -1) {
1334  int length_of_each_segment = pls->timelines[i]->duration / pls->fragment_timescale;
1335  num = c->period_duration / length_of_each_segment;
1336  } else {
1337  num += pls->timelines[i]->repeat;
1338  }
1339  }
1340  } else if (c->is_live && pls->fragment_duration) {
1342  } else if (pls->fragment_duration) {
1344  }
1345 
1346  return num;
1347 }
1348 
1349 static void move_timelines(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
1350 {
1351  if (rep_dest && rep_src ) {
1352  free_timelines_list(rep_dest);
1353  rep_dest->timelines = rep_src->timelines;
1354  rep_dest->n_timelines = rep_src->n_timelines;
1355  rep_dest->first_seq_no = rep_src->first_seq_no;
1356  rep_dest->last_seq_no = calc_max_seg_no(rep_dest, c);
1357  rep_src->timelines = NULL;
1358  rep_src->n_timelines = 0;
1359  rep_dest->cur_seq_no = rep_src->cur_seq_no;
1360  }
1361 }
1362 
1363 static void move_segments(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
1364 {
1365  if (rep_dest && rep_src ) {
1366  free_fragment_list(rep_dest);
1367  if (rep_src->start_number > (rep_dest->start_number + rep_dest->n_fragments))
1368  rep_dest->cur_seq_no = 0;
1369  else
1370  rep_dest->cur_seq_no += rep_src->start_number - rep_dest->start_number;
1371  rep_dest->fragments = rep_src->fragments;
1372  rep_dest->n_fragments = rep_src->n_fragments;
1373  rep_dest->parent = rep_src->parent;
1374  rep_dest->last_seq_no = calc_max_seg_no(rep_dest, c);
1375  rep_src->fragments = NULL;
1376  rep_src->n_fragments = 0;
1377  }
1378 }
1379 
1380 
1382 {
1383 
1384  int ret = 0, i;
1385  DASHContext *c = s->priv_data;
1386 
1387  // save current context
1388  int n_videos = c->n_videos;
1389  struct representation **videos = c->videos;
1390  int n_audios = c->n_audios;
1391  struct representation **audios = c->audios;
1392  char *base_url = c->base_url;
1393 
1394  c->base_url = NULL;
1395  c->n_videos = 0;
1396  c->videos = NULL;
1397  c->n_audios = 0;
1398  c->audios = NULL;
1399  ret = parse_manifest(s, s->url, NULL);
1400  if (ret)
1401  goto finish;
1402 
1403  if (c->n_videos != n_videos) {
1404  av_log(c, AV_LOG_ERROR,
1405  "new manifest has mismatched no. of video representations, %d -> %d\n",
1406  n_videos, c->n_videos);
1407  return AVERROR_INVALIDDATA;
1408  }
1409  if (c->n_audios != n_audios) {
1410  av_log(c, AV_LOG_ERROR,
1411  "new manifest has mismatched no. of audio representations, %d -> %d\n",
1412  n_audios, c->n_audios);
1413  return AVERROR_INVALIDDATA;
1414  }
1415 
1416  for (i = 0; i < n_videos; i++) {
1417  struct representation *cur_video = videos[i];
1418  struct representation *ccur_video = c->videos[i];
1419  if (cur_video->timelines) {
1420  // calc current time
1421  int64_t currentTime = get_segment_start_time_based_on_timeline(cur_video, cur_video->cur_seq_no) / cur_video->fragment_timescale;
1422  // update segments
1423  ccur_video->cur_seq_no = calc_next_seg_no_from_timelines(ccur_video, currentTime * cur_video->fragment_timescale - 1);
1424  if (ccur_video->cur_seq_no >= 0) {
1425  move_timelines(ccur_video, cur_video, c);
1426  }
1427  }
1428  if (cur_video->fragments) {
1429  move_segments(ccur_video, cur_video, c);
1430  }
1431  }
1432  for (i = 0; i < n_audios; i++) {
1433  struct representation *cur_audio = audios[i];
1434  struct representation *ccur_audio = c->audios[i];
1435  if (cur_audio->timelines) {
1436  // calc current time
1437  int64_t currentTime = get_segment_start_time_based_on_timeline(cur_audio, cur_audio->cur_seq_no) / cur_audio->fragment_timescale;
1438  // update segments
1439  ccur_audio->cur_seq_no = calc_next_seg_no_from_timelines(ccur_audio, currentTime * cur_audio->fragment_timescale - 1);
1440  if (ccur_audio->cur_seq_no >= 0) {
1441  move_timelines(ccur_audio, cur_audio, c);
1442  }
1443  }
1444  if (cur_audio->fragments) {
1445  move_segments(ccur_audio, cur_audio, c);
1446  }
1447  }
1448 
1449 finish:
1450  // restore context
1451  if (c->base_url)
1452  av_free(base_url);
1453  else
1454  c->base_url = base_url;
1455  if (c->audios)
1456  free_audio_list(c);
1457  if (c->videos)
1458  free_video_list(c);
1459  c->n_audios = n_audios;
1460  c->audios = audios;
1461  c->n_videos = n_videos;
1462  c->videos = videos;
1463  return ret;
1464 }
1465 
1466 static struct fragment *get_current_fragment(struct representation *pls)
1467 {
1468  int64_t min_seq_no = 0;
1469  int64_t max_seq_no = 0;
1470  struct fragment *seg = NULL;
1471  struct fragment *seg_ptr = NULL;
1472  DASHContext *c = pls->parent->priv_data;
1473 
1474  while (( !ff_check_interrupt(c->interrupt_callback)&& pls->n_fragments > 0)) {
1475  if (pls->cur_seq_no < pls->n_fragments) {
1476  seg_ptr = pls->fragments[pls->cur_seq_no];
1477  seg = av_mallocz(sizeof(struct fragment));
1478  if (!seg) {
1479  return NULL;
1480  }
1481  seg->url = av_strdup(seg_ptr->url);
1482  if (!seg->url) {
1483  av_free(seg);
1484  return NULL;
1485  }
1486  seg->size = seg_ptr->size;
1487  seg->url_offset = seg_ptr->url_offset;
1488  return seg;
1489  } else if (c->is_live) {
1490  refresh_manifest(pls->parent);
1491  } else {
1492  break;
1493  }
1494  }
1495  if (c->is_live) {
1496  min_seq_no = calc_min_seg_no(pls->parent, pls);
1497  max_seq_no = calc_max_seg_no(pls, c);
1498 
1499  if (pls->timelines || pls->fragments) {
1500  refresh_manifest(pls->parent);
1501  }
1502  if (pls->cur_seq_no <= min_seq_no) {
1503  av_log(pls->parent, AV_LOG_VERBOSE, "old fragment: cur[%"PRId64"] min[%"PRId64"] max[%"PRId64"], playlist %d\n", (int64_t)pls->cur_seq_no, min_seq_no, max_seq_no, (int)pls->rep_idx);
1504  pls->cur_seq_no = calc_cur_seg_no(pls->parent, pls);
1505  } else if (pls->cur_seq_no > max_seq_no) {
1506  av_log(pls->parent, AV_LOG_VERBOSE, "new fragment: min[%"PRId64"] max[%"PRId64"], playlist %d\n", min_seq_no, max_seq_no, (int)pls->rep_idx);
1507  }
1508  seg = av_mallocz(sizeof(struct fragment));
1509  if (!seg) {
1510  return NULL;
1511  }
1512  } else if (pls->cur_seq_no <= pls->last_seq_no) {
1513  seg = av_mallocz(sizeof(struct fragment));
1514  if (!seg) {
1515  return NULL;
1516  }
1517  }
1518  if (seg) {
1519  char *tmpfilename= av_mallocz(c->max_url_size);
1520  if (!tmpfilename) {
1521  return NULL;
1522  }
1524  seg->url = av_strireplace(pls->url_template, pls->url_template, tmpfilename);
1525  if (!seg->url) {
1526  av_log(pls->parent, AV_LOG_WARNING, "Unable to resolve template url '%s', try to use origin template\n", pls->url_template);
1527  seg->url = av_strdup(pls->url_template);
1528  if (!seg->url) {
1529  av_log(pls->parent, AV_LOG_ERROR, "Cannot resolve template url '%s'\n", pls->url_template);
1530  av_free(tmpfilename);
1531  return NULL;
1532  }
1533  }
1534  av_free(tmpfilename);
1535  seg->size = -1;
1536  }
1537 
1538  return seg;
1539 }
1540 
1544 };
1545 
1546 static int read_from_url(struct representation *pls, struct fragment *seg,
1547  uint8_t *buf, int buf_size,
1548  enum ReadFromURLMode mode)
1549 {
1550  int ret;
1551 
1552  /* limit read if the fragment was only a part of a file */
1553  if (seg->size >= 0)
1554  buf_size = FFMIN(buf_size, pls->cur_seg_size - pls->cur_seg_offset);
1555 
1556  if (mode == READ_COMPLETE) {
1557  ret = avio_read(pls->input, buf, buf_size);
1558  if (ret < buf_size) {
1559  av_log(pls->parent, AV_LOG_WARNING, "Could not read complete fragment.\n");
1560  }
1561  } else {
1562  ret = avio_read(pls->input, buf, buf_size);
1563  }
1564  if (ret > 0)
1565  pls->cur_seg_offset += ret;
1566 
1567  return ret;
1568 }
1569 
1570 static int open_input(DASHContext *c, struct representation *pls, struct fragment *seg)
1571 {
1572  AVDictionary *opts = NULL;
1573  char *url = NULL;
1574  int ret = 0;
1575 
1576  url = av_mallocz(c->max_url_size);
1577  if (!url) {
1578  goto cleanup;
1579  }
1580 
1581  if (seg->size >= 0) {
1582  /* try to restrict the HTTP request to the part we want
1583  * (if this is in fact a HTTP request) */
1584  av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1585  av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1586  }
1587 
1588  ff_make_absolute_url(url, c->max_url_size, c->base_url, seg->url);
1589  av_log(pls->parent, AV_LOG_VERBOSE, "DASH request for url '%s', offset %"PRId64", playlist %d\n",
1590  url, seg->url_offset, pls->rep_idx);
1591  ret = open_url(pls->parent, &pls->input, url, c->avio_opts, opts, NULL);
1592  if (ret < 0) {
1593  goto cleanup;
1594  }
1595 
1596 cleanup:
1597  av_free(url);
1598  av_dict_free(&opts);
1599  pls->cur_seg_offset = 0;
1600  pls->cur_seg_size = seg->size;
1601  return ret;
1602 }
1603 
1604 static int update_init_section(struct representation *pls)
1605 {
1606  static const int max_init_section_size = 1024 * 1024;
1607  DASHContext *c = pls->parent->priv_data;
1608  int64_t sec_size;
1609  int64_t urlsize;
1610  int ret;
1611 
1612  if (!pls->init_section || pls->init_sec_buf)
1613  return 0;
1614 
1615  ret = open_input(c, pls, pls->init_section);
1616  if (ret < 0) {
1618  "Failed to open an initialization section in playlist %d\n",
1619  pls->rep_idx);
1620  return ret;
1621  }
1622 
1623  if (pls->init_section->size >= 0)
1624  sec_size = pls->init_section->size;
1625  else if ((urlsize = avio_size(pls->input)) >= 0)
1626  sec_size = urlsize;
1627  else
1628  sec_size = max_init_section_size;
1629 
1630  av_log(pls->parent, AV_LOG_DEBUG,
1631  "Downloading an initialization section of size %"PRId64"\n",
1632  sec_size);
1633 
1634  sec_size = FFMIN(sec_size, max_init_section_size);
1635 
1636  av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1637 
1638  ret = read_from_url(pls, pls->init_section, pls->init_sec_buf,
1640  ff_format_io_close(pls->parent, &pls->input);
1641 
1642  if (ret < 0)
1643  return ret;
1644 
1645  pls->init_sec_data_len = ret;
1646  pls->init_sec_buf_read_offset = 0;
1647 
1648  return 0;
1649 }
1650 
1651 static int64_t seek_data(void *opaque, int64_t offset, int whence)
1652 {
1653  struct representation *v = opaque;
1654  if (v->n_fragments && !v->init_sec_data_len) {
1655  return avio_seek(v->input, offset, whence);
1656  }
1657 
1658  return AVERROR(ENOSYS);
1659 }
1660 
1661 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1662 {
1663  int ret = 0;
1664  struct representation *v = opaque;
1665  DASHContext *c = v->parent->priv_data;
1666 
1667 restart:
1668  if (!v->input) {
1669  free_fragment(&v->cur_seg);
1670  v->cur_seg = get_current_fragment(v);
1671  if (!v->cur_seg) {
1672  ret = AVERROR_EOF;
1673  goto end;
1674  }
1675 
1676  /* load/update Media Initialization Section, if any */
1677  ret = update_init_section(v);
1678  if (ret)
1679  goto end;
1680 
1681  ret = open_input(c, v, v->cur_seg);
1682  if (ret < 0) {
1684  goto end;
1685  ret = AVERROR_EXIT;
1686  }
1687  av_log(v->parent, AV_LOG_WARNING, "Failed to open fragment of playlist %d\n", v->rep_idx);
1688  v->cur_seq_no++;
1689  goto restart;
1690  }
1691  }
1692 
1694  /* Push init section out first before first actual fragment */
1695  int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1696  memcpy(buf, v->init_sec_buf, copy_size);
1697  v->init_sec_buf_read_offset += copy_size;
1698  ret = copy_size;
1699  goto end;
1700  }
1701 
1702  /* check the v->cur_seg, if it is null, get current and double check if the new v->cur_seg*/
1703  if (!v->cur_seg) {
1704  v->cur_seg = get_current_fragment(v);
1705  }
1706  if (!v->cur_seg) {
1707  ret = AVERROR_EOF;
1708  goto end;
1709  }
1710  ret = read_from_url(v, v->cur_seg, buf, buf_size, READ_NORMAL);
1711  if (ret > 0)
1712  goto end;
1713 
1714  if (c->is_live || v->cur_seq_no < v->last_seq_no) {
1715  if (!v->is_restart_needed)
1716  v->cur_seq_no++;
1717  v->is_restart_needed = 1;
1718  }
1719 
1720 end:
1721  return ret;
1722 }
1723 
1725 {
1726  DASHContext *c = s->priv_data;
1727  const char *opts[] = { "headers", "user_agent", "cookies", NULL }, **opt = opts;
1728  uint8_t *buf = NULL;
1729  int ret = 0;
1730 
1731  while (*opt) {
1732  if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >= 0) {
1733  if (buf[0] != '\0') {
1734  ret = av_dict_set(&c->avio_opts, *opt, buf, AV_DICT_DONT_STRDUP_VAL);
1735  if (ret < 0) {
1736  av_freep(&buf);
1737  return ret;
1738  }
1739  } else {
1740  av_freep(&buf);
1741  }
1742  }
1743  opt++;
1744  }
1745 
1746  return ret;
1747 }
1748 
1749 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1750  int flags, AVDictionary **opts)
1751 {
1752  av_log(s, AV_LOG_ERROR,
1753  "A DASH playlist item '%s' referred to an external file '%s'. "
1754  "Opening this file was forbidden for security reasons\n",
1755  s->url, url);
1756  return AVERROR(EPERM);
1757 }
1758 
1760 {
1761  /* note: the internal buffer could have changed */
1762  av_freep(&pls->pb.buffer);
1763  memset(&pls->pb, 0x00, sizeof(AVIOContext));
1764  pls->ctx->pb = NULL;
1765  avformat_close_input(&pls->ctx);
1766  pls->ctx = NULL;
1767 }
1768 
1770 {
1771  DASHContext *c = s->priv_data;
1772  AVInputFormat *in_fmt = NULL;
1773  AVDictionary *in_fmt_opts = NULL;
1774  uint8_t *avio_ctx_buffer = NULL;
1775  int ret = 0, i;
1776 
1777  if (pls->ctx) {
1779  }
1780  if (!(pls->ctx = avformat_alloc_context())) {
1781  ret = AVERROR(ENOMEM);
1782  goto fail;
1783  }
1784 
1785  avio_ctx_buffer = av_malloc(INITIAL_BUFFER_SIZE);
1786  if (!avio_ctx_buffer ) {
1787  ret = AVERROR(ENOMEM);
1788  avformat_free_context(pls->ctx);
1789  pls->ctx = NULL;
1790  goto fail;
1791  }
1792  if (c->is_live) {
1793  ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, NULL);
1794  } else {
1795  ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, seek_data);
1796  }
1797  pls->pb.seekable = 0;
1798 
1799  if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
1800  goto fail;
1801 
1802  pls->ctx->flags = AVFMT_FLAG_CUSTOM_IO;
1803  pls->ctx->probesize = 1024 * 4;
1805  ret = av_probe_input_buffer(&pls->pb, &in_fmt, "", NULL, 0, 0);
1806  if (ret < 0) {
1807  av_log(s, AV_LOG_ERROR, "Error when loading first fragment, playlist %d\n", (int)pls->rep_idx);
1808  avformat_free_context(pls->ctx);
1809  pls->ctx = NULL;
1810  goto fail;
1811  }
1812 
1813  pls->ctx->pb = &pls->pb;
1814  pls->ctx->io_open = nested_io_open;
1815 
1816  // provide additional information from mpd if available
1817  ret = avformat_open_input(&pls->ctx, "", in_fmt, &in_fmt_opts); //pls->init_section->url
1818  av_dict_free(&in_fmt_opts);
1819  if (ret < 0)
1820  goto fail;
1821  if (pls->n_fragments) {
1822 #if FF_API_R_FRAME_RATE
1823  if (pls->framerate.den) {
1824  for (i = 0; i < pls->ctx->nb_streams; i++)
1825  pls->ctx->streams[i]->r_frame_rate = pls->framerate;
1826  }
1827 #endif
1828 
1829  ret = avformat_find_stream_info(pls->ctx, NULL);
1830  if (ret < 0)
1831  goto fail;
1832  }
1833 
1834 fail:
1835  return ret;
1836 }
1837 
1839 {
1840  int ret = 0;
1841  int i;
1842 
1843  pls->parent = s;
1844  pls->cur_seq_no = calc_cur_seg_no(s, pls);
1845 
1846  if (!pls->last_seq_no) {
1847  pls->last_seq_no = calc_max_seg_no(pls, s->priv_data);
1848  }
1849 
1850  ret = reopen_demux_for_component(s, pls);
1851  if (ret < 0) {
1852  goto fail;
1853  }
1854  for (i = 0; i < pls->ctx->nb_streams; i++) {
1855  AVStream *st = avformat_new_stream(s, NULL);
1856  AVStream *ist = pls->ctx->streams[i];
1857  if (!st) {
1858  ret = AVERROR(ENOMEM);
1859  goto fail;
1860  }
1861  st->id = i;
1864  }
1865 
1866  return 0;
1867 fail:
1868  return ret;
1869 }
1870 
1871 static int is_common_init_section_exist(struct representation **pls, int n_pls)
1872 {
1873  struct fragment *first_init_section = pls[0]->init_section;
1874  char *url =NULL;
1875  int64_t url_offset = -1;
1876  int64_t size = -1;
1877  int i = 0;
1878 
1879  if (first_init_section == NULL || n_pls == 0)
1880  return 0;
1881 
1882  url = first_init_section->url;
1883  url_offset = first_init_section->url_offset;
1884  size = pls[0]->init_section->size;
1885  for (i=0;i<n_pls;i++) {
1886  if (av_strcasecmp(pls[i]->init_section->url,url) || pls[i]->init_section->url_offset != url_offset || pls[i]->init_section->size != size) {
1887  return 0;
1888  }
1889  }
1890  return 1;
1891 }
1892 
1893 static void copy_init_section(struct representation *rep_dest, struct representation *rep_src)
1894 {
1895  rep_dest->init_sec_buf = av_mallocz(rep_src->init_sec_buf_size);
1896  memcpy(rep_dest->init_sec_buf, rep_src->init_sec_buf, rep_src->init_sec_data_len);
1897  rep_dest->init_sec_buf_size = rep_src->init_sec_buf_size;
1898  rep_dest->init_sec_data_len = rep_src->init_sec_data_len;
1899  rep_dest->cur_timestamp = rep_src->cur_timestamp;
1900 }
1901 
1902 
1904 {
1905  DASHContext *c = s->priv_data;
1906  int ret = 0;
1907  int stream_index = 0;
1908  int i;
1909 
1911 
1912  if ((ret = save_avio_options(s)) < 0)
1913  goto fail;
1914 
1915  av_dict_set(&c->avio_opts, "seekable", "0", 0);
1916 
1917  if ((ret = parse_manifest(s, s->url, s->pb)) < 0)
1918  goto fail;
1919 
1920  /* If this isn't a live stream, fill the total duration of the
1921  * stream. */
1922  if (!c->is_live) {
1924  }
1925 
1926  if(c->n_videos)
1928 
1929  /* Open the demuxer for video and audio components if available */
1930  for (i = 0; i < c->n_videos; i++) {
1931  struct representation *cur_video = c->videos[i];
1932  if (i > 0 && c->is_init_section_common_video) {
1933  copy_init_section(cur_video,c->videos[0]);
1934  }
1935  ret = open_demux_for_component(s, cur_video);
1936 
1937  if (ret)
1938  goto fail;
1939  cur_video->stream_index = stream_index;
1940  ++stream_index;
1941  }
1942 
1943  if(c->n_audios)
1945 
1946  for (i = 0; i < c->n_audios; i++) {
1947  struct representation *cur_audio = c->audios[i];
1948  if (i > 0 && c->is_init_section_common_audio) {
1949  copy_init_section(cur_audio,c->audios[0]);
1950  }
1951  ret = open_demux_for_component(s, cur_audio);
1952 
1953  if (ret)
1954  goto fail;
1955  cur_audio->stream_index = stream_index;
1956  ++stream_index;
1957  }
1958 
1959  if (!stream_index) {
1960  ret = AVERROR_INVALIDDATA;
1961  goto fail;
1962  }
1963 
1964  /* Create a program */
1965  if (!ret) {
1966  AVProgram *program;
1967  program = av_new_program(s, 0);
1968  if (!program) {
1969  goto fail;
1970  }
1971 
1972  for (i = 0; i < c->n_videos; i++) {
1973  struct representation *pls = c->videos[i];
1974 
1976  pls->assoc_stream = s->streams[pls->stream_index];
1977  if (pls->bandwidth > 0)
1978  av_dict_set_int(&pls->assoc_stream->metadata, "variant_bitrate", pls->bandwidth, 0);
1979  if (pls->id[0])
1980  av_dict_set(&pls->assoc_stream->metadata, "id", pls->id, 0);
1981  }
1982  for (i = 0; i < c->n_audios; i++) {
1983  struct representation *pls = c->audios[i];
1984 
1986  pls->assoc_stream = s->streams[pls->stream_index];
1987  if (pls->bandwidth > 0)
1988  av_dict_set_int(&pls->assoc_stream->metadata, "variant_bitrate", pls->bandwidth, 0);
1989  if (pls->id[0])
1990  av_dict_set(&pls->assoc_stream->metadata, "id", pls->id, 0);
1991  }
1992  }
1993 
1994  return 0;
1995 fail:
1996  return ret;
1997 }
1998 
2000 {
2001  int i, j;
2002 
2003  for (i = 0; i < n; i++) {
2004  struct representation *pls = p[i];
2005 
2006  int needed = !pls->assoc_stream || pls->assoc_stream->discard < AVDISCARD_ALL;
2007  if (needed && !pls->ctx) {
2008  pls->cur_seg_offset = 0;
2009  pls->init_sec_buf_read_offset = 0;
2010  /* Catch up */
2011  for (j = 0; j < n; j++) {
2012  pls->cur_seq_no = FFMAX(pls->cur_seq_no, p[j]->cur_seq_no);
2013  }
2015  av_log(s, AV_LOG_INFO, "Now receiving stream_index %d\n", pls->stream_index);
2016  } else if (!needed && pls->ctx) {
2018  if (pls->input)
2019  ff_format_io_close(pls->parent, &pls->input);
2020  av_log(s, AV_LOG_INFO, "No longer receiving stream_index %d\n", pls->stream_index);
2021  }
2022  }
2023 }
2024 
2026 {
2027  DASHContext *c = s->priv_data;
2028  int ret = 0, i;
2029  int64_t mints = 0;
2030  struct representation *cur = NULL;
2031 
2034 
2035  for (i = 0; i < c->n_videos; i++) {
2036  struct representation *pls = c->videos[i];
2037  if (!pls->ctx)
2038  continue;
2039  if (!cur || pls->cur_timestamp < mints) {
2040  cur = pls;
2041  mints = pls->cur_timestamp;
2042  }
2043  }
2044  for (i = 0; i < c->n_audios; i++) {
2045  struct representation *pls = c->audios[i];
2046  if (!pls->ctx)
2047  continue;
2048  if (!cur || pls->cur_timestamp < mints) {
2049  cur = pls;
2050  mints = pls->cur_timestamp;
2051  }
2052  }
2053 
2054  if (!cur) {
2055  return AVERROR_INVALIDDATA;
2056  }
2057  while (!ff_check_interrupt(c->interrupt_callback) && !ret) {
2058  ret = av_read_frame(cur->ctx, pkt);
2059  if (ret >= 0) {
2060  /* If we got a packet, return it */
2061  cur->cur_timestamp = av_rescale(pkt->pts, (int64_t)cur->ctx->streams[0]->time_base.num * 90000, cur->ctx->streams[0]->time_base.den);
2062  pkt->stream_index = cur->stream_index;
2063  return 0;
2064  }
2065  if (cur->is_restart_needed) {
2066  cur->cur_seg_offset = 0;
2067  cur->init_sec_buf_read_offset = 0;
2068  if (cur->input)
2069  ff_format_io_close(cur->parent, &cur->input);
2070  ret = reopen_demux_for_component(s, cur);
2071  cur->is_restart_needed = 0;
2072  }
2073  }
2074  return AVERROR_EOF;
2075 }
2076 
2078 {
2079  DASHContext *c = s->priv_data;
2080  free_audio_list(c);
2081  free_video_list(c);
2082 
2083  av_dict_free(&c->avio_opts);
2084  av_freep(&c->base_url);
2085  return 0;
2086 }
2087 
2088 static int dash_seek(AVFormatContext *s, struct representation *pls, int64_t seek_pos_msec, int flags, int dry_run)
2089 {
2090  int ret = 0;
2091  int i = 0;
2092  int j = 0;
2093  int64_t duration = 0;
2094 
2095  av_log(pls->parent, AV_LOG_VERBOSE, "DASH seek pos[%"PRId64"ms], playlist %d%s\n",
2096  seek_pos_msec, pls->rep_idx, dry_run ? " (dry)" : "");
2097 
2098  // single fragment mode
2099  if (pls->n_fragments == 1) {
2100  pls->cur_timestamp = 0;
2101  pls->cur_seg_offset = 0;
2102  if (dry_run)
2103  return 0;
2104  ff_read_frame_flush(pls->ctx);
2105  return av_seek_frame(pls->ctx, -1, seek_pos_msec * 1000, flags);
2106  }
2107 
2108  if (pls->input)
2109  ff_format_io_close(pls->parent, &pls->input);
2110 
2111  // find the nearest fragment
2112  if (pls->n_timelines > 0 && pls->fragment_timescale > 0) {
2113  int64_t num = pls->first_seq_no;
2114  av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline start n_timelines[%d] "
2115  "last_seq_no[%"PRId64"], playlist %d.\n",
2116  (int)pls->n_timelines, (int64_t)pls->last_seq_no, (int)pls->rep_idx);
2117  for (i = 0; i < pls->n_timelines; i++) {
2118  if (pls->timelines[i]->starttime > 0) {
2119  duration = pls->timelines[i]->starttime;
2120  }
2121  duration += pls->timelines[i]->duration;
2122  if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
2123  goto set_seq_num;
2124  }
2125  for (j = 0; j < pls->timelines[i]->repeat; j++) {
2126  duration += pls->timelines[i]->duration;
2127  num++;
2128  if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
2129  goto set_seq_num;
2130  }
2131  }
2132  num++;
2133  }
2134 
2135 set_seq_num:
2136  pls->cur_seq_no = num > pls->last_seq_no ? pls->last_seq_no : num;
2137  av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline end cur_seq_no[%"PRId64"], playlist %d.\n",
2138  (int64_t)pls->cur_seq_no, (int)pls->rep_idx);
2139  } else if (pls->fragment_duration > 0) {
2140  pls->cur_seq_no = pls->first_seq_no + ((seek_pos_msec * pls->fragment_timescale) / pls->fragment_duration) / 1000;
2141  } else {
2142  av_log(pls->parent, AV_LOG_ERROR, "dash_seek missing timeline or fragment_duration\n");
2143  pls->cur_seq_no = pls->first_seq_no;
2144  }
2145  pls->cur_timestamp = 0;
2146  pls->cur_seg_offset = 0;
2147  pls->init_sec_buf_read_offset = 0;
2148  ret = dry_run ? 0 : reopen_demux_for_component(s, pls);
2149 
2150  return ret;
2151 }
2152 
2153 static int dash_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
2154 {
2155  int ret = 0, i;
2156  DASHContext *c = s->priv_data;
2157  int64_t seek_pos_msec = av_rescale_rnd(timestamp, 1000,
2158  s->streams[stream_index]->time_base.den,
2159  flags & AVSEEK_FLAG_BACKWARD ?
2161  if ((flags & AVSEEK_FLAG_BYTE) || c->is_live)
2162  return AVERROR(ENOSYS);
2163 
2164  /* Seek in discarded streams with dry_run=1 to avoid reopening them */
2165  for (i = 0; i < c->n_videos; i++) {
2166  if (!ret)
2167  ret = dash_seek(s, c->videos[i], seek_pos_msec, flags, !c->videos[i]->ctx);
2168  }
2169  for (i = 0; i < c->n_audios; i++) {
2170  if (!ret)
2171  ret = dash_seek(s, c->audios[i], seek_pos_msec, flags, !c->audios[i]->ctx);
2172  }
2173 
2174  return ret;
2175 }
2176 
2177 static int dash_probe(AVProbeData *p)
2178 {
2179  if (!av_stristr(p->buf, "<MPD"))
2180  return 0;
2181 
2182  if (av_stristr(p->buf, "dash:profile:isoff-on-demand:2011") ||
2183  av_stristr(p->buf, "dash:profile:isoff-live:2011") ||
2184  av_stristr(p->buf, "dash:profile:isoff-live:2012") ||
2185  av_stristr(p->buf, "dash:profile:isoff-main:2011")) {
2186  return AVPROBE_SCORE_MAX;
2187  }
2188  if (av_stristr(p->buf, "dash:profile")) {
2189  return AVPROBE_SCORE_MAX;
2190  }
2191 
2192  return 0;
2193 }
2194 
2195 #define OFFSET(x) offsetof(DASHContext, x)
2196 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2197 static const AVOption dash_options[] = {
2198  {"allowed_extensions", "List of file extensions that dash is allowed to access",
2199  OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2200  {.str = "aac,m4a,m4s,m4v,mov,mp4"},
2201  INT_MIN, INT_MAX, FLAGS},
2202  {NULL}
2203 };
2204 
2205 static const AVClass dash_class = {
2206  .class_name = "dash",
2207  .item_name = av_default_item_name,
2208  .option = dash_options,
2209  .version = LIBAVUTIL_VERSION_INT,
2210 };
2211 
2213  .name = "dash",
2214  .long_name = NULL_IF_CONFIG_SMALL("Dynamic Adaptive Streaming over HTTP"),
2215  .priv_class = &dash_class,
2216  .priv_data_size = sizeof(DASHContext),
2223 };
time_t av_timegm(struct tm *tm)
Convert the decomposed UTC time in tm to a time_t value.
Definition: parseutils.c:568
int64_t cur_seg_size
Definition: dashdec.c:109
#define FLAGS
Definition: dashdec.c:2196
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2504
int64_t probesize
Maximum size of the data read from input for determining the input container format.
Definition: avformat.h:1517
AVIOContext * input
Definition: dashdec.c:78
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:771
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
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:336
int64_t url_offset
Definition: dashdec.c:34
int n_fragments
Definition: dashdec.c:92
char * allowed_extensions
Definition: dashdec.c:146
int av_parse_video_rate(AVRational *rate, const char *arg)
Parse str and store the detected values in *rate.
Definition: parseutils.c:179
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1629
AVOption.
Definition: opt.h:246
ReadFromURLMode
Definition: dashdec.c:1541
int n_audios
Definition: dashdec.c:128
static int64_t get_segment_start_time_based_on_timeline(struct representation *pls, int64_t cur_seq_no)
Definition: dashdec.c:246
int n_timelines
Definition: dashdec.c:95
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
AVPacket pkt
Definition: dashdec.c:81
static int read_data(void *opaque, uint8_t *buf, int buf_size)
Definition: dashdec.c:1661
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:4849
int ff_copy_whiteblacklists(AVFormatContext *dst, const AVFormatContext *src)
Copies the whilelists from one context to the other.
Definition: utils.c:164
char * av_stristr(const char *s1, const char *s2)
Locate the first case-independent occurrence in the string haystack of the string needle...
Definition: avstring.c:56
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
static int ishttp(char *url)
Definition: dashdec.c:156
int num
Numerator.
Definition: rational.h:59
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
#define AVIO_FLAG_READ
read-only
Definition: avio.h:654
int64_t size
Definition: dashdec.c:35
unsigned char * buffer
Start of the buffer.
Definition: avio.h:226
static struct fragment * get_current_fragment(struct representation *pls)
Definition: dashdec.c:1466
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:217
static const AVOption dash_options[]
Definition: dashdec.c:2197
static int64_t seek_data(void *opaque, int64_t offset, int whence)
Definition: dashdec.c:1651
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
discard all
Definition: avcodec.h:797
static AVPacket pkt
int64_t cur_timestamp
Definition: dashdec.c:118
int n_videos
Definition: dashdec.c:126
static int parse_manifest_segmenturlnode(AVFormatContext *s, struct representation *rep, xmlNodePtr fragmenturl_node, xmlNodePtr *baseurl_nodes, char *rep_id_val, char *rep_bandwidth_val)
Definition: dashdec.c:580
int is_init_section_common_audio
Definition: dashdec.c:152
uint64_t min_buffer_time
Definition: dashdec.c:138
static void free_fragment(struct fragment **seg)
Definition: dashdec.c:311
Format I/O context.
Definition: avformat.h:1351
#define MAX_URL_SIZE
Definition: internal.h:30
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
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1917
struct fragment * init_section
Definition: dashdec.c:113
uint32_t init_sec_buf_read_offset
Definition: dashdec.c:117
int stream_index
Definition: dashdec.c:84
static uint64_t get_utc_date_time_insec(AVFormatContext *s, const char *datetime)
Definition: dashdec.c:172
static int64_t start_time
Definition: ffplay.c:327
uint64_t suggested_presentation_delay
Definition: dashdec.c:133
uint8_t
Round toward +infinity.
Definition: mathematics.h:83
#define av_malloc(s)
uint64_t media_presentation_duration
Definition: dashdec.c:132
AVOptions.
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
int64_t presentation_timeoffset
Definition: dashdec.c:105
int id
Format-specific stream ID.
Definition: avformat.h:881
static int dash_close(AVFormatContext *s)
Definition: dashdec.c:2077
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5637
uint64_t period_duration
Definition: dashdec.c:141
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4456
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
int64_t duration
Definition: movenc.c:63
int64_t first_seq_no
Definition: dashdec.c:98
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:144
AVIOContext pb
Definition: dashdec.c:77
static void finish(void)
Definition: movenc.c:345
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1482
AVProgram * av_new_program(AVFormatContext *s, int id)
Definition: utils.c:4555
struct timeline ** timelines
Definition: dashdec.c:96
#define AVERROR_EOF
End of file.
Definition: error.h:55
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
int av_match_ext(const char *filename, const char *extensions)
Return a positive value if the given filename has one of the given extensions, 0 otherwise.
Definition: format.c:38
uint64_t publish_time
Definition: dashdec.c:135
ptrdiff_t size
Definition: opengl_enc.c:101
static void recheck_discard_flags(AVFormatContext *s, struct representation **p, int n)
Definition: dashdec.c:1999
#define flags(name, subs,...)
Definition: cbs_h2645.c:263
uint64_t availability_start_time
Definition: dashdec.c:134
static enum AVMediaType get_content_type(xmlNodePtr node)
Definition: dashdec.c:538
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:648
struct representation ** audios
Definition: dashdec.c:129
#define INITIAL_BUFFER_SIZE
Definition: dashdec.c:31
static xmlNodePtr find_child_node_by_name(xmlNodePtr rootnode, const char *nodename)
Definition: dashdec.c:521
static int aligned(int val)
Definition: dashdec.c:162
Callback for checking whether to abort blocking functions.
Definition: avio.h:58
int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt, const char *url, void *logctx, unsigned int offset, unsigned int max_probe_size)
Like av_probe_input_buffer2() but returns 0 on success.
Definition: format.c:312
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:2012
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
uint32_t init_sec_data_len
Definition: dashdec.c:116
static void free_timelines_list(struct representation *pls)
Definition: dashdec.c:331
int64_t starttime
Definition: dashdec.c:57
static void move_segments(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
Definition: dashdec.c:1363
static int64_t calc_max_seg_no(struct representation *pls, DASHContext *c)
Definition: dashdec.c:1323
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
static int64_t calc_cur_seg_no(AVFormatContext *s, struct representation *pls)
Definition: dashdec.c:1279
int avio_close(AVIOContext *s)
Close the resource accessed by the AVIOContext s and free it.
Definition: aviobuf.c:1190
char * url
input or output URL.
Definition: avformat.h:1447
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
static int is_common_init_section_exist(struct representation **pls, int n_pls)
Definition: dashdec.c:1871
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:203
static int dash_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: dashdec.c:2153
char * av_strireplace(const char *str, const char *from, const char *to)
Locale-independent strings replace.
Definition: avstring.c:234
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
New fields can be added to the end with minor version bumps.
Definition: avformat.h:1268
#define FFMAX(a, b)
Definition: common.h:94
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:117
static int read_from_url(struct representation *pls, struct fragment *seg, uint8_t *buf, int buf_size, enum ReadFromURLMode mode)
Definition: dashdec.c:1546
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
Allocate a buffer, reusing the given one if large enough.
Definition: mem.c:488
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:450
uint64_t minimum_update_period
Definition: dashdec.c:136
struct fragment ** fragments
Definition: dashdec.c:93
static void free_representation(struct representation *pls)
Definition: dashdec.c:342
AVIOInterruptCB * interrupt_callback
Definition: dashdec.c:145
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
static void free_audio_list(DASHContext *c)
Definition: dashdec.c:372
AVDictionary * opts
Definition: movenc.c:50
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
#define dynarray_add(tab, nb_ptr, elem)
Definition: internal.h:198
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
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
void av_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
#define FFMIN(a, b)
Definition: common.h:96
int av_strcasecmp(const char *a, const char *b)
Locale-independent case-insensitive compare.
Definition: avstring.c:213
static void free_fragment_list(struct representation *pls)
Definition: dashdec.c:320
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:556
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:76
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:109
int32_t
static void move_timelines(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
Definition: dashdec.c:1349
static void copy_init_section(struct representation *rep_dest, struct representation *rep_src)
Definition: dashdec.c:1893
static uint32_t get_duration_insec(AVFormatContext *s, const char *duration)
Definition: dashdec.c:202
#define s(width, name)
Definition: cbs_vp9.c:257
int is_live
Definition: dashdec.c:144
enum AVMediaType type
Definition: dashdec.c:86
#define OFFSET(x)
Definition: dashdec.c:2195
static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url, AVDictionary *opts, AVDictionary *opts2, int *is_http)
Definition: dashdec.c:383
static int parse_manifest(AVFormatContext *s, const char *url, AVIOContext *in)
Definition: dashdec.c:1103
int n
Definition: avisynth_c.h:684
AVDictionary * metadata
Definition: avformat.h:938
#define AVFMT_FLAG_CUSTOM_IO
The caller has supplied a custom AVIOContext, don't avio_close() it.
Definition: avformat.h:1490
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:200
static int save_avio_options(AVFormatContext *s)
Definition: dashdec.c:1724
char * url
Definition: dashdec.c:36
#define AVERROR_EXIT
Immediate exit was requested; the called function should not be restarted.
Definition: error.h:56
int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding rnd)
Rescale a 64-bit integer with specified rounding.
Definition: mathematics.c:58
uint64_t period_start
Definition: dashdec.c:142
int64_t max_analyze_duration
Maximum duration (in AV_TIME_BASE units) of the data read from input in avformat_find_stream_info().
Definition: avformat.h:1525
static char * get_val_from_nodes_tab(xmlNodePtr *nodes, const int n_nodes, const char *attrname)
Definition: dashdec.c:505
static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **opts)
Definition: dashdec.c:1749
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:530
int64_t av_gettime(void)
Get the current time in microseconds.
Definition: time.c:39
static int dash_probe(AVProbeData *p)
Definition: dashdec.c:2177
Stream structure.
Definition: avformat.h:874
void ff_dash_fill_tmpl_params(char *dst, size_t buffer_size, const char *template, int rep_id, int number, int bit_rate, int64_t time)
Definition: dash.c:96
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
AVFormatContext * parent
Definition: dashdec.c:79
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:251
int ff_check_interrupt(AVIOInterruptCB *cb)
Check if the user has requested to interrupt a blocking function associated with cb.
Definition: avio.c:664
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
int64_t last_seq_no
Definition: dashdec.c:99
static AVRational av_make_q(int num, int den)
Create an AVRational.
Definition: rational.h:71
uint32_t init_sec_buf_size
Definition: dashdec.c:115
int64_t cur_seq_no
Definition: dashdec.c:107
int max_url_size
Definition: dashdec.c:148
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-> in
static int dash_read_header(AVFormatContext *s)
Definition: dashdec.c:1903
void * buf
Definition: avisynth_c.h:690
GLint GLenum type
Definition: opengl_enc.c:105
uint64_t time_shift_buffer_depth
Definition: dashdec.c:137
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
Describe the class of an AVClass context structure.
Definition: log.h:67
static int open_input(DASHContext *c, struct representation *pls, struct fragment *seg)
Definition: dashdec.c:1570
static int dash_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: dashdec.c:2025
Rational number (pair of numerator and denominator).
Definition: rational.h:58
static int resolve_content_path(AVFormatContext *s, const char *url, int *max_url_size, xmlNodePtr *baseurl_nodes, int n_baseurl_nodes)
Definition: dashdec.c:683
#define AVSEEK_FLAG_BYTE
seeking based on position in bytes
Definition: avformat.h:2505
AVMediaType
Definition: avutil.h:199
static struct fragment * get_Fragment(char *range)
Definition: dashdec.c:562
static int parse_manifest_segmenttimeline(AVFormatContext *s, struct representation *rep, xmlNodePtr fragment_timeline_node)
Definition: dashdec.c:647
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:1178
char id[20]
Definition: dashdec.c:87
AVDictionary * avio_opts
Definition: dashdec.c:147
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4390
This structure contains the data a format has to probe a file.
Definition: avformat.h:448
misc parsing utilities
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1767
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
Round toward -infinity.
Definition: mathematics.h:82
const char * avio_find_protocol_name(const char *url)
Return the name of the protocol that will handle the passed URL.
Definition: avio.c:473
AVInputFormat ff_dash_demuxer
Definition: dashdec.c:2212
static int dash_seek(AVFormatContext *s, struct representation *pls, int64_t seek_pos_msec, int flags, int dry_run)
Definition: dashdec.c:2088
int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Seek to the keyframe at timestamp.
Definition: utils.c:2505
char * av_strtok(char *s, const char *delim, char **saveptr)
Split the string into several tokens which can be accessed by successive calls to av_strtok()...
Definition: avstring.c:184
static int update_init_section(struct representation *pls)
Definition: dashdec.c:1604
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:460
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:34
int
int64_t duration
Definition: dashdec.c:67
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:81
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: utils.c:3565
static const AVClass dash_class
Definition: dashdec.c:2205
static double c[64]
int64_t fragment_duration
Definition: dashdec.c:102
int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, int flags)
Convenience wrapper for av_dict_set that converts the value to a string and stores it...
Definition: dict.c:147
struct fragment * cur_seg
Definition: dashdec.c:110
int pts_wrap_bits
number of bits in pts (used for wrapping control)
Definition: avformat.h:1066
int bandwidth
Definition: dashdec.c:88
int den
Denominator.
Definition: rational.h:60
AVFormatContext * ctx
Definition: dashdec.c:80
int rep_count
Definition: dashdec.c:83
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
Definition: utils.c:4428
int64_t fragment_timescale
Definition: dashdec.c:103
static void close_demux_for_component(struct representation *pls)
Definition: dashdec.c:1759
int is_restart_needed
Definition: dashdec.c:119
int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
Definition: opt.c:754
#define av_free(p)
#define AVFMT_NO_BYTE_SEEK
Format does not allow seeking by bytes.
Definition: avformat.h:477
static int parse_manifest_adaptationset(AVFormatContext *s, const char *url, xmlNodePtr adaptionset_node, xmlNodePtr mpd_baseurl_node, xmlNodePtr period_baseurl_node, xmlNodePtr period_segmenttemplate_node, xmlNodePtr period_segmentlist_node)
Definition: dashdec.c:1055
uint8_t * init_sec_buf
Definition: dashdec.c:114
static char * get_content_url(xmlNodePtr *baseurl_nodes, int n_baseurl_nodes, int max_url_size, char *rep_id_val, char *rep_bandwidth_val, char *val)
Definition: dashdec.c:449
AVRational framerate
Definition: dashdec.c:89
void * priv_data
Format private data.
Definition: avformat.h:1379
int64_t start_number
Definition: dashdec.c:100
static uint64_t get_current_time_in_sec(void)
Definition: dashdec.c:167
int avformat_open_input(AVFormatContext **ps, const char *url, AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
Definition: utils.c:537
static int parse_manifest_representation(AVFormatContext *s, const char *url, xmlNodePtr node, xmlNodePtr adaptionset_node, xmlNodePtr mpd_baseurl_node, xmlNodePtr period_baseurl_node, xmlNodePtr period_segmenttemplate_node, xmlNodePtr period_segmentlist_node, xmlNodePtr fragment_template_node, xmlNodePtr content_component_node, xmlNodePtr adaptionset_baseurl_node, xmlNodePtr adaptionset_segmentlist_node, xmlNodePtr adaptionset_supplementalproperty_node)
Definition: dashdec.c:793
static int64_t calc_min_seg_no(AVFormatContext *s, struct representation *pls)
Definition: dashdec.c:1310
int64_t cur_seg_offset
Definition: dashdec.c:108
struct representation ** videos
Definition: dashdec.c:127
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1466
static void free_video_list(DASHContext *c)
Definition: dashdec.c:361
#define av_freep(p)
void INT64 start
Definition: avisynth_c.h:690
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:647
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1021
char * url_template
Definition: dashdec.c:76
int is_init_section_common_video
Definition: dashdec.c:151
int stream_index
Definition: avcodec.h:1435
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:903
static int reopen_demux_for_component(AVFormatContext *s, struct representation *pls)
Definition: dashdec.c:1769
int64_t repeat
Definition: dashdec.c:63
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:929
AVRational r_frame_rate
Real base framerate of the stream.
Definition: avformat.h:998
int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)
A callback for opening new IO streams.
Definition: avformat.h:1933
This structure stores compressed data.
Definition: avcodec.h:1410
mode
Use these values in ebur128_init (or'ed).
Definition: ebur128.h:83
static int64_t calc_next_seg_no_from_timelines(struct representation *pls, int64_t cur_time)
Definition: dashdec.c:281
char * base_url
Definition: dashdec.c:124
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1426
static int open_demux_for_component(AVFormatContext *s, struct representation *pls)
Definition: dashdec.c:1838
GLuint buffer
Definition: opengl_enc.c:102
AVStream * assoc_stream
Definition: dashdec.c:90
static av_cold void cleanup(FlashSV2Context *s)
Definition: flashsv2enc.c:127
static int refresh_manifest(AVFormatContext *s)
Definition: dashdec.c:1381
static uint8_t tmp[11]
Definition: aes_ctr.c:26