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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;
138 
139  int n_videos;
141  int n_audios;
145 
146  /* MediaPresentationDescription Attribute */
151  uint64_t publish_time;
154  uint64_t min_buffer_time;
155 
156  /* Period Attribute */
157  uint64_t period_duration;
158  uint64_t period_start;
159 
160  int is_live;
165 
166  /* Flags for init section*/
169 
170 } DASHContext;
171 
172 static int ishttp(char *url)
173 {
174  const char *proto_name = avio_find_protocol_name(url);
175  return av_strstart(proto_name, "http", NULL);
176 }
177 
178 static int aligned(int val)
179 {
180  return ((val + 0x3F) >> 6) << 6;
181 }
182 
183 static uint64_t get_current_time_in_sec(void)
184 {
185  return av_gettime() / 1000000;
186 }
187 
188 static uint64_t get_utc_date_time_insec(AVFormatContext *s, const char *datetime)
189 {
190  struct tm timeinfo;
191  int year = 0;
192  int month = 0;
193  int day = 0;
194  int hour = 0;
195  int minute = 0;
196  int ret = 0;
197  float second = 0.0;
198 
199  /* ISO-8601 date parser */
200  if (!datetime)
201  return 0;
202 
203  ret = sscanf(datetime, "%d-%d-%dT%d:%d:%fZ", &year, &month, &day, &hour, &minute, &second);
204  /* year, month, day, hour, minute, second 6 arguments */
205  if (ret != 6) {
206  av_log(s, AV_LOG_WARNING, "get_utc_date_time_insec get a wrong time format\n");
207  }
208  timeinfo.tm_year = year - 1900;
209  timeinfo.tm_mon = month - 1;
210  timeinfo.tm_mday = day;
211  timeinfo.tm_hour = hour;
212  timeinfo.tm_min = minute;
213  timeinfo.tm_sec = (int)second;
214 
215  return av_timegm(&timeinfo);
216 }
217 
218 static uint32_t get_duration_insec(AVFormatContext *s, const char *duration)
219 {
220  /* ISO-8601 duration parser */
221  uint32_t days = 0;
222  uint32_t hours = 0;
223  uint32_t mins = 0;
224  uint32_t secs = 0;
225  int size = 0;
226  float value = 0;
227  char type = '\0';
228  const char *ptr = duration;
229 
230  while (*ptr) {
231  if (*ptr == 'P' || *ptr == 'T') {
232  ptr++;
233  continue;
234  }
235 
236  if (sscanf(ptr, "%f%c%n", &value, &type, &size) != 2) {
237  av_log(s, AV_LOG_WARNING, "get_duration_insec get a wrong time format\n");
238  return 0; /* parser error */
239  }
240  switch (type) {
241  case 'D':
242  days = (uint32_t)value;
243  break;
244  case 'H':
245  hours = (uint32_t)value;
246  break;
247  case 'M':
248  mins = (uint32_t)value;
249  break;
250  case 'S':
251  secs = (uint32_t)value;
252  break;
253  default:
254  // handle invalid type
255  break;
256  }
257  ptr += size;
258  }
259  return ((days * 24 + hours) * 60 + mins) * 60 + secs;
260 }
261 
262 static int64_t get_segment_start_time_based_on_timeline(struct representation *pls, int64_t cur_seq_no)
263 {
264  int64_t start_time = 0;
265  int64_t i = 0;
266  int64_t j = 0;
267  int64_t num = 0;
268 
269  if (pls->n_timelines) {
270  for (i = 0; i < pls->n_timelines; i++) {
271  if (pls->timelines[i]->starttime > 0) {
272  start_time = pls->timelines[i]->starttime;
273  }
274  if (num == cur_seq_no)
275  goto finish;
276 
277  start_time += pls->timelines[i]->duration;
278 
279  if (pls->timelines[i]->repeat == -1) {
280  start_time = pls->timelines[i]->duration * cur_seq_no;
281  goto finish;
282  }
283 
284  for (j = 0; j < pls->timelines[i]->repeat; j++) {
285  num++;
286  if (num == cur_seq_no)
287  goto finish;
288  start_time += pls->timelines[i]->duration;
289  }
290  num++;
291  }
292  }
293 finish:
294  return start_time;
295 }
296 
297 static int64_t calc_next_seg_no_from_timelines(struct representation *pls, int64_t cur_time)
298 {
299  int64_t i = 0;
300  int64_t j = 0;
301  int64_t num = 0;
302  int64_t start_time = 0;
303 
304  for (i = 0; i < pls->n_timelines; i++) {
305  if (pls->timelines[i]->starttime > 0) {
306  start_time = pls->timelines[i]->starttime;
307  }
308  if (start_time > cur_time)
309  goto finish;
310 
311  start_time += pls->timelines[i]->duration;
312  for (j = 0; j < pls->timelines[i]->repeat; j++) {
313  num++;
314  if (start_time > cur_time)
315  goto finish;
316  start_time += pls->timelines[i]->duration;
317  }
318  num++;
319  }
320 
321  return -1;
322 
323 finish:
324  return num;
325 }
326 
327 static void free_fragment(struct fragment **seg)
328 {
329  if (!(*seg)) {
330  return;
331  }
332  av_freep(&(*seg)->url);
333  av_freep(seg);
334 }
335 
336 static void free_fragment_list(struct representation *pls)
337 {
338  int i;
339 
340  for (i = 0; i < pls->n_fragments; i++) {
341  free_fragment(&pls->fragments[i]);
342  }
343  av_freep(&pls->fragments);
344  pls->n_fragments = 0;
345 }
346 
347 static void free_timelines_list(struct representation *pls)
348 {
349  int i;
350 
351  for (i = 0; i < pls->n_timelines; i++) {
352  av_freep(&pls->timelines[i]);
353  }
354  av_freep(&pls->timelines);
355  pls->n_timelines = 0;
356 }
357 
358 static void free_representation(struct representation *pls)
359 {
360  free_fragment_list(pls);
361  free_timelines_list(pls);
362  free_fragment(&pls->cur_seg);
364  av_freep(&pls->init_sec_buf);
365  av_freep(&pls->pb.buffer);
366  if (pls->input)
367  ff_format_io_close(pls->parent, &pls->input);
368  if (pls->ctx) {
369  pls->ctx->pb = NULL;
370  avformat_close_input(&pls->ctx);
371  }
372 
373  av_freep(&pls->url_template);
374  av_freep(&pls);
375 }
376 
378 {
379  int i;
380  for (i = 0; i < c->n_videos; i++) {
381  struct representation *pls = c->videos[i];
382  free_representation(pls);
383  }
384  av_freep(&c->videos);
385  c->n_videos = 0;
386 }
387 
389 {
390  int i;
391  for (i = 0; i < c->n_audios; i++) {
392  struct representation *pls = c->audios[i];
393  free_representation(pls);
394  }
395  av_freep(&c->audios);
396  c->n_audios = 0;
397 }
398 
400 {
401  int i;
402  for (i = 0; i < c->n_subtitles; i++) {
403  struct representation *pls = c->subtitles[i];
404  free_representation(pls);
405  }
406  av_freep(&c->subtitles);
407  c->n_subtitles = 0;
408 }
409 
410 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
411  AVDictionary *opts, AVDictionary *opts2, int *is_http)
412 {
413  DASHContext *c = s->priv_data;
414  AVDictionary *tmp = NULL;
415  const char *proto_name = NULL;
416  int ret;
417 
418  av_dict_copy(&tmp, opts, 0);
419  av_dict_copy(&tmp, opts2, 0);
420 
421  if (av_strstart(url, "crypto", NULL)) {
422  if (url[6] == '+' || url[6] == ':')
423  proto_name = avio_find_protocol_name(url + 7);
424  }
425 
426  if (!proto_name)
427  proto_name = avio_find_protocol_name(url);
428 
429  if (!proto_name)
430  return AVERROR_INVALIDDATA;
431 
432  // only http(s) & file are allowed
433  if (av_strstart(proto_name, "file", NULL)) {
434  if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
435  av_log(s, AV_LOG_ERROR,
436  "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
437  "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
438  url);
439  return AVERROR_INVALIDDATA;
440  }
441  } else if (av_strstart(proto_name, "http", NULL)) {
442  ;
443  } else
444  return AVERROR_INVALIDDATA;
445 
446  if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
447  ;
448  else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
449  ;
450  else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
451  return AVERROR_INVALIDDATA;
452 
453  av_freep(pb);
454  ret = avio_open2(pb, url, AVIO_FLAG_READ, c->interrupt_callback, &tmp);
455  if (ret >= 0) {
456  // update cookies on http response with setcookies.
457  char *new_cookies = NULL;
458 
459  if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
460  av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
461 
462  if (new_cookies) {
463  av_dict_set(&opts, "cookies", new_cookies, AV_DICT_DONT_STRDUP_VAL);
464  }
465 
466  }
467 
468  av_dict_free(&tmp);
469 
470  if (is_http)
471  *is_http = av_strstart(proto_name, "http", NULL);
472 
473  return ret;
474 }
475 
476 static char *get_content_url(xmlNodePtr *baseurl_nodes,
477  int n_baseurl_nodes,
478  int max_url_size,
479  char *rep_id_val,
480  char *rep_bandwidth_val,
481  char *val)
482 {
483  int i;
484  char *text;
485  char *url = NULL;
486  char *tmp_str = av_mallocz(max_url_size);
487  char *tmp_str_2 = av_mallocz(max_url_size);
488 
489  if (!tmp_str || !tmp_str_2) {
490  return NULL;
491  }
492 
493  for (i = 0; i < n_baseurl_nodes; ++i) {
494  if (baseurl_nodes[i] &&
495  baseurl_nodes[i]->children &&
496  baseurl_nodes[i]->children->type == XML_TEXT_NODE) {
497  text = xmlNodeGetContent(baseurl_nodes[i]->children);
498  if (text) {
499  memset(tmp_str, 0, max_url_size);
500  memset(tmp_str_2, 0, max_url_size);
501  ff_make_absolute_url(tmp_str_2, max_url_size, tmp_str, text);
502  av_strlcpy(tmp_str, tmp_str_2, max_url_size);
503  xmlFree(text);
504  }
505  }
506  }
507 
508  if (val)
509  ff_make_absolute_url(tmp_str, max_url_size, tmp_str, val);
510 
511  if (rep_id_val) {
512  url = av_strireplace(tmp_str, "$RepresentationID$", (const char*)rep_id_val);
513  if (!url) {
514  goto end;
515  }
516  av_strlcpy(tmp_str, url, max_url_size);
517  }
518  if (rep_bandwidth_val && tmp_str[0] != '\0') {
519  // free any previously assigned url before reassigning
520  av_free(url);
521  url = av_strireplace(tmp_str, "$Bandwidth$", (const char*)rep_bandwidth_val);
522  if (!url) {
523  goto end;
524  }
525  }
526 end:
527  av_free(tmp_str);
528  av_free(tmp_str_2);
529  return url;
530 }
531 
532 static char *get_val_from_nodes_tab(xmlNodePtr *nodes, const int n_nodes, const char *attrname)
533 {
534  int i;
535  char *val;
536 
537  for (i = 0; i < n_nodes; ++i) {
538  if (nodes[i]) {
539  val = xmlGetProp(nodes[i], attrname);
540  if (val)
541  return val;
542  }
543  }
544 
545  return NULL;
546 }
547 
548 static xmlNodePtr find_child_node_by_name(xmlNodePtr rootnode, const char *nodename)
549 {
550  xmlNodePtr node = rootnode;
551  if (!node) {
552  return NULL;
553  }
554 
555  node = xmlFirstElementChild(node);
556  while (node) {
557  if (!av_strcasecmp(node->name, nodename)) {
558  return node;
559  }
560  node = xmlNextElementSibling(node);
561  }
562  return NULL;
563 }
564 
565 static enum AVMediaType get_content_type(xmlNodePtr node)
566 {
568  int i = 0;
569  const char *attr;
570  char *val = NULL;
571 
572  if (node) {
573  for (i = 0; i < 2; i++) {
574  attr = i ? "mimeType" : "contentType";
575  val = xmlGetProp(node, attr);
576  if (val) {
577  if (av_stristr((const char *)val, "video")) {
578  type = AVMEDIA_TYPE_VIDEO;
579  } else if (av_stristr((const char *)val, "audio")) {
580  type = AVMEDIA_TYPE_AUDIO;
581  } else if (av_stristr((const char *)val, "text")) {
582  type = AVMEDIA_TYPE_SUBTITLE;
583  }
584  xmlFree(val);
585  }
586  }
587  }
588  return type;
589 }
590 
591 static struct fragment * get_Fragment(char *range)
592 {
593  struct fragment * seg = av_mallocz(sizeof(struct fragment));
594 
595  if (!seg)
596  return NULL;
597 
598  seg->size = -1;
599  if (range) {
600  char *str_end_offset;
601  char *str_offset = av_strtok(range, "-", &str_end_offset);
602  seg->url_offset = strtoll(str_offset, NULL, 10);
603  seg->size = strtoll(str_end_offset, NULL, 10) - seg->url_offset;
604  }
605 
606  return seg;
607 }
608 
610  xmlNodePtr fragmenturl_node,
611  xmlNodePtr *baseurl_nodes,
612  char *rep_id_val,
613  char *rep_bandwidth_val)
614 {
615  DASHContext *c = s->priv_data;
616  char *initialization_val = NULL;
617  char *media_val = NULL;
618  char *range_val = NULL;
619  int max_url_size = c ? c->max_url_size: MAX_URL_SIZE;
620 
621  if (!av_strcasecmp(fragmenturl_node->name, (const char *)"Initialization")) {
622  initialization_val = xmlGetProp(fragmenturl_node, "sourceURL");
623  range_val = xmlGetProp(fragmenturl_node, "range");
624  if (initialization_val || range_val) {
625  rep->init_section = get_Fragment(range_val);
626  if (!rep->init_section) {
627  xmlFree(initialization_val);
628  xmlFree(range_val);
629  return AVERROR(ENOMEM);
630  }
631  rep->init_section->url = get_content_url(baseurl_nodes, 4,
632  max_url_size,
633  rep_id_val,
634  rep_bandwidth_val,
635  initialization_val);
636 
637  if (!rep->init_section->url) {
638  av_free(rep->init_section);
639  xmlFree(initialization_val);
640  xmlFree(range_val);
641  return AVERROR(ENOMEM);
642  }
643  xmlFree(initialization_val);
644  xmlFree(range_val);
645  }
646  } else if (!av_strcasecmp(fragmenturl_node->name, (const char *)"SegmentURL")) {
647  media_val = xmlGetProp(fragmenturl_node, "media");
648  range_val = xmlGetProp(fragmenturl_node, "mediaRange");
649  if (media_val || range_val) {
650  struct fragment *seg = get_Fragment(range_val);
651  if (!seg) {
652  xmlFree(media_val);
653  xmlFree(range_val);
654  return AVERROR(ENOMEM);
655  }
656  seg->url = get_content_url(baseurl_nodes, 4,
657  max_url_size,
658  rep_id_val,
659  rep_bandwidth_val,
660  media_val);
661  if (!seg->url) {
662  av_free(seg);
663  xmlFree(media_val);
664  xmlFree(range_val);
665  return AVERROR(ENOMEM);
666  }
667  dynarray_add(&rep->fragments, &rep->n_fragments, seg);
668  xmlFree(media_val);
669  xmlFree(range_val);
670  }
671  }
672 
673  return 0;
674 }
675 
677  xmlNodePtr fragment_timeline_node)
678 {
679  xmlAttrPtr attr = NULL;
680  char *val = NULL;
681 
682  if (!av_strcasecmp(fragment_timeline_node->name, (const char *)"S")) {
683  struct timeline *tml = av_mallocz(sizeof(struct timeline));
684  if (!tml) {
685  return AVERROR(ENOMEM);
686  }
687  attr = fragment_timeline_node->properties;
688  while (attr) {
689  val = xmlGetProp(fragment_timeline_node, attr->name);
690 
691  if (!val) {
692  av_log(s, AV_LOG_WARNING, "parse_manifest_segmenttimeline attr->name = %s val is NULL\n", attr->name);
693  continue;
694  }
695 
696  if (!av_strcasecmp(attr->name, (const char *)"t")) {
697  tml->starttime = (int64_t)strtoll(val, NULL, 10);
698  } else if (!av_strcasecmp(attr->name, (const char *)"r")) {
699  tml->repeat =(int64_t) strtoll(val, NULL, 10);
700  } else if (!av_strcasecmp(attr->name, (const char *)"d")) {
701  tml->duration = (int64_t)strtoll(val, NULL, 10);
702  }
703  attr = attr->next;
704  xmlFree(val);
705  }
706  dynarray_add(&rep->timelines, &rep->n_timelines, tml);
707  }
708 
709  return 0;
710 }
711 
712 static int resolve_content_path(AVFormatContext *s, const char *url, int *max_url_size, xmlNodePtr *baseurl_nodes, int n_baseurl_nodes) {
713 
714  char *tmp_str = NULL;
715  char *path = NULL;
716  char *mpdName = NULL;
717  xmlNodePtr node = NULL;
718  char *baseurl = NULL;
719  char *root_url = NULL;
720  char *text = NULL;
721  char *tmp = NULL;
722 
723  int isRootHttp = 0;
724  char token ='/';
725  int start = 0;
726  int rootId = 0;
727  int updated = 0;
728  int size = 0;
729  int i;
730  int tmp_max_url_size = strlen(url);
731 
732  for (i = n_baseurl_nodes-1; i >= 0 ; i--) {
733  text = xmlNodeGetContent(baseurl_nodes[i]);
734  if (!text)
735  continue;
736  tmp_max_url_size += strlen(text);
737  if (ishttp(text)) {
738  xmlFree(text);
739  break;
740  }
741  xmlFree(text);
742  }
743 
744  tmp_max_url_size = aligned(tmp_max_url_size);
745  text = av_mallocz(tmp_max_url_size);
746  if (!text) {
747  updated = AVERROR(ENOMEM);
748  goto end;
749  }
750  av_strlcpy(text, url, strlen(url)+1);
751  tmp = text;
752  while (mpdName = av_strtok(tmp, "/", &tmp)) {
753  size = strlen(mpdName);
754  }
755  av_free(text);
756 
757  path = av_mallocz(tmp_max_url_size);
758  tmp_str = av_mallocz(tmp_max_url_size);
759  if (!tmp_str || !path) {
760  updated = AVERROR(ENOMEM);
761  goto end;
762  }
763 
764  av_strlcpy (path, url, strlen(url) - size + 1);
765  for (rootId = n_baseurl_nodes - 1; rootId > 0; rootId --) {
766  if (!(node = baseurl_nodes[rootId])) {
767  continue;
768  }
769  text = xmlNodeGetContent(node);
770  if (ishttp(text)) {
771  xmlFree(text);
772  break;
773  }
774  xmlFree(text);
775  }
776 
777  node = baseurl_nodes[rootId];
778  baseurl = xmlNodeGetContent(node);
779  root_url = (av_strcasecmp(baseurl, "")) ? baseurl : path;
780  if (node) {
781  xmlNodeSetContent(node, root_url);
782  updated = 1;
783  }
784 
785  size = strlen(root_url);
786  isRootHttp = ishttp(root_url);
787 
788  if (root_url[size - 1] != token) {
789  av_strlcat(root_url, "/", size + 2);
790  size += 2;
791  }
792 
793  for (i = 0; i < n_baseurl_nodes; ++i) {
794  if (i == rootId) {
795  continue;
796  }
797  text = xmlNodeGetContent(baseurl_nodes[i]);
798  if (text) {
799  memset(tmp_str, 0, strlen(tmp_str));
800  if (!ishttp(text) && isRootHttp) {
801  av_strlcpy(tmp_str, root_url, size + 1);
802  }
803  start = (text[0] == token);
804  av_strlcat(tmp_str, text + start, tmp_max_url_size);
805  xmlNodeSetContent(baseurl_nodes[i], tmp_str);
806  updated = 1;
807  xmlFree(text);
808  }
809  }
810 
811 end:
812  if (tmp_max_url_size > *max_url_size) {
813  *max_url_size = tmp_max_url_size;
814  }
815  av_free(path);
816  av_free(tmp_str);
817  xmlFree(baseurl);
818  return updated;
819 
820 }
821 
822 static int parse_manifest_representation(AVFormatContext *s, const char *url,
823  xmlNodePtr node,
824  xmlNodePtr adaptionset_node,
825  xmlNodePtr mpd_baseurl_node,
826  xmlNodePtr period_baseurl_node,
827  xmlNodePtr period_segmenttemplate_node,
828  xmlNodePtr period_segmentlist_node,
829  xmlNodePtr fragment_template_node,
830  xmlNodePtr content_component_node,
831  xmlNodePtr adaptionset_baseurl_node,
832  xmlNodePtr adaptionset_segmentlist_node,
833  xmlNodePtr adaptionset_supplementalproperty_node)
834 {
835  int32_t ret = 0;
836  int32_t subtitle_rep_idx = 0;
837  int32_t audio_rep_idx = 0;
838  int32_t video_rep_idx = 0;
839  DASHContext *c = s->priv_data;
840  struct representation *rep = NULL;
841  struct fragment *seg = NULL;
842  xmlNodePtr representation_segmenttemplate_node = NULL;
843  xmlNodePtr representation_baseurl_node = NULL;
844  xmlNodePtr representation_segmentlist_node = NULL;
845  xmlNodePtr segmentlists_tab[2];
846  xmlNodePtr fragment_timeline_node = NULL;
847  xmlNodePtr fragment_templates_tab[5];
848  char *duration_val = NULL;
849  char *presentation_timeoffset_val = NULL;
850  char *startnumber_val = NULL;
851  char *timescale_val = NULL;
852  char *initialization_val = NULL;
853  char *media_val = NULL;
854  char *val = NULL;
855  xmlNodePtr baseurl_nodes[4];
856  xmlNodePtr representation_node = node;
857  char *rep_id_val = xmlGetProp(representation_node, "id");
858  char *rep_bandwidth_val = xmlGetProp(representation_node, "bandwidth");
859  char *rep_framerate_val = xmlGetProp(representation_node, "frameRate");
861 
862  // try get information from representation
863  if (type == AVMEDIA_TYPE_UNKNOWN)
864  type = get_content_type(representation_node);
865  // try get information from contentComponen
866  if (type == AVMEDIA_TYPE_UNKNOWN)
867  type = get_content_type(content_component_node);
868  // try get information from adaption set
869  if (type == AVMEDIA_TYPE_UNKNOWN)
870  type = get_content_type(adaptionset_node);
871  if (type == AVMEDIA_TYPE_UNKNOWN) {
872  av_log(s, AV_LOG_VERBOSE, "Parsing '%s' - skipp not supported representation type\n", url);
873  } else if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO || type == AVMEDIA_TYPE_SUBTITLE) {
874  // convert selected representation to our internal struct
875  rep = av_mallocz(sizeof(struct representation));
876  if (!rep) {
877  ret = AVERROR(ENOMEM);
878  goto end;
879  }
880  representation_segmenttemplate_node = find_child_node_by_name(representation_node, "SegmentTemplate");
881  representation_baseurl_node = find_child_node_by_name(representation_node, "BaseURL");
882  representation_segmentlist_node = find_child_node_by_name(representation_node, "SegmentList");
883 
884  baseurl_nodes[0] = mpd_baseurl_node;
885  baseurl_nodes[1] = period_baseurl_node;
886  baseurl_nodes[2] = adaptionset_baseurl_node;
887  baseurl_nodes[3] = representation_baseurl_node;
888 
889  ret = resolve_content_path(s, url, &c->max_url_size, baseurl_nodes, 4);
891  + (rep_id_val ? strlen(rep_id_val) : 0)
892  + (rep_bandwidth_val ? strlen(rep_bandwidth_val) : 0));
893  if (ret == AVERROR(ENOMEM) || ret == 0) {
894  goto end;
895  }
896  if (representation_segmenttemplate_node || fragment_template_node || period_segmenttemplate_node) {
897  fragment_timeline_node = NULL;
898  fragment_templates_tab[0] = representation_segmenttemplate_node;
899  fragment_templates_tab[1] = adaptionset_segmentlist_node;
900  fragment_templates_tab[2] = fragment_template_node;
901  fragment_templates_tab[3] = period_segmenttemplate_node;
902  fragment_templates_tab[4] = period_segmentlist_node;
903 
904  presentation_timeoffset_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "presentationTimeOffset");
905  duration_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "duration");
906  startnumber_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "startNumber");
907  timescale_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "timescale");
908  initialization_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "initialization");
909  media_val = get_val_from_nodes_tab(fragment_templates_tab, 4, "media");
910 
911  if (initialization_val) {
912  rep->init_section = av_mallocz(sizeof(struct fragment));
913  if (!rep->init_section) {
914  av_free(rep);
915  ret = AVERROR(ENOMEM);
916  goto end;
917  }
918  c->max_url_size = aligned(c->max_url_size + strlen(initialization_val));
919  rep->init_section->url = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, initialization_val);
920  if (!rep->init_section->url) {
921  av_free(rep->init_section);
922  av_free(rep);
923  ret = AVERROR(ENOMEM);
924  goto end;
925  }
926  rep->init_section->size = -1;
927  xmlFree(initialization_val);
928  }
929 
930  if (media_val) {
931  c->max_url_size = aligned(c->max_url_size + strlen(media_val));
932  rep->url_template = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, media_val);
933  xmlFree(media_val);
934  }
935 
936  if (presentation_timeoffset_val) {
937  rep->presentation_timeoffset = (int64_t) strtoll(presentation_timeoffset_val, NULL, 10);
938  av_log(s, AV_LOG_TRACE, "rep->presentation_timeoffset = [%"PRId64"]\n", rep->presentation_timeoffset);
939  xmlFree(presentation_timeoffset_val);
940  }
941  if (duration_val) {
942  rep->fragment_duration = (int64_t) strtoll(duration_val, NULL, 10);
943  av_log(s, AV_LOG_TRACE, "rep->fragment_duration = [%"PRId64"]\n", rep->fragment_duration);
944  xmlFree(duration_val);
945  }
946  if (timescale_val) {
947  rep->fragment_timescale = (int64_t) strtoll(timescale_val, NULL, 10);
948  av_log(s, AV_LOG_TRACE, "rep->fragment_timescale = [%"PRId64"]\n", rep->fragment_timescale);
949  xmlFree(timescale_val);
950  }
951  if (startnumber_val) {
952  rep->first_seq_no = (int64_t) strtoll(startnumber_val, NULL, 10);
953  av_log(s, AV_LOG_TRACE, "rep->first_seq_no = [%"PRId64"]\n", rep->first_seq_no);
954  xmlFree(startnumber_val);
955  }
956  if (adaptionset_supplementalproperty_node) {
957  if (!av_strcasecmp(xmlGetProp(adaptionset_supplementalproperty_node,"schemeIdUri"), "http://dashif.org/guidelines/last-segment-number")) {
958  val = xmlGetProp(adaptionset_supplementalproperty_node,"value");
959  if (!val) {
960  av_log(s, AV_LOG_ERROR, "Missing value attribute in adaptionset_supplementalproperty_node\n");
961  } else {
962  rep->last_seq_no =(int64_t) strtoll(val, NULL, 10) - 1;
963  xmlFree(val);
964  }
965  }
966  }
967 
968  fragment_timeline_node = find_child_node_by_name(representation_segmenttemplate_node, "SegmentTimeline");
969 
970  if (!fragment_timeline_node)
971  fragment_timeline_node = find_child_node_by_name(fragment_template_node, "SegmentTimeline");
972  if (!fragment_timeline_node)
973  fragment_timeline_node = find_child_node_by_name(adaptionset_segmentlist_node, "SegmentTimeline");
974  if (!fragment_timeline_node)
975  fragment_timeline_node = find_child_node_by_name(period_segmentlist_node, "SegmentTimeline");
976  if (fragment_timeline_node) {
977  fragment_timeline_node = xmlFirstElementChild(fragment_timeline_node);
978  while (fragment_timeline_node) {
979  ret = parse_manifest_segmenttimeline(s, rep, fragment_timeline_node);
980  if (ret < 0) {
981  return ret;
982  }
983  fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
984  }
985  }
986  } else if (representation_baseurl_node && !representation_segmentlist_node) {
987  seg = av_mallocz(sizeof(struct fragment));
988  if (!seg) {
989  ret = AVERROR(ENOMEM);
990  goto end;
991  }
992  seg->url = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, NULL);
993  if (!seg->url) {
994  av_free(seg);
995  ret = AVERROR(ENOMEM);
996  goto end;
997  }
998  seg->size = -1;
999  dynarray_add(&rep->fragments, &rep->n_fragments, seg);
1000  } else if (representation_segmentlist_node) {
1001  // TODO: https://www.brendanlong.com/the-structure-of-an-mpeg-dash-mpd.html
1002  // http://www-itec.uni-klu.ac.at/dash/ddash/mpdGenerator.php?fragmentlength=15&type=full
1003  xmlNodePtr fragmenturl_node = NULL;
1004  segmentlists_tab[0] = representation_segmentlist_node;
1005  segmentlists_tab[1] = adaptionset_segmentlist_node;
1006 
1007  duration_val = get_val_from_nodes_tab(segmentlists_tab, 2, "duration");
1008  timescale_val = get_val_from_nodes_tab(segmentlists_tab, 2, "timescale");
1009  if (duration_val) {
1010  rep->fragment_duration = (int64_t) strtoll(duration_val, NULL, 10);
1011  av_log(s, AV_LOG_TRACE, "rep->fragment_duration = [%"PRId64"]\n", rep->fragment_duration);
1012  xmlFree(duration_val);
1013  }
1014  if (timescale_val) {
1015  rep->fragment_timescale = (int64_t) strtoll(timescale_val, NULL, 10);
1016  av_log(s, AV_LOG_TRACE, "rep->fragment_timescale = [%"PRId64"]\n", rep->fragment_timescale);
1017  xmlFree(timescale_val);
1018  }
1019  fragmenturl_node = xmlFirstElementChild(representation_segmentlist_node);
1020  while (fragmenturl_node) {
1021  ret = parse_manifest_segmenturlnode(s, rep, fragmenturl_node,
1022  baseurl_nodes,
1023  rep_id_val,
1024  rep_bandwidth_val);
1025  if (ret < 0) {
1026  return ret;
1027  }
1028  fragmenturl_node = xmlNextElementSibling(fragmenturl_node);
1029  }
1030 
1031  fragment_timeline_node = find_child_node_by_name(representation_segmenttemplate_node, "SegmentTimeline");
1032 
1033  if (!fragment_timeline_node)
1034  fragment_timeline_node = find_child_node_by_name(fragment_template_node, "SegmentTimeline");
1035  if (!fragment_timeline_node)
1036  fragment_timeline_node = find_child_node_by_name(adaptionset_segmentlist_node, "SegmentTimeline");
1037  if (!fragment_timeline_node)
1038  fragment_timeline_node = find_child_node_by_name(period_segmentlist_node, "SegmentTimeline");
1039  if (fragment_timeline_node) {
1040  fragment_timeline_node = xmlFirstElementChild(fragment_timeline_node);
1041  while (fragment_timeline_node) {
1042  ret = parse_manifest_segmenttimeline(s, rep, fragment_timeline_node);
1043  if (ret < 0) {
1044  return ret;
1045  }
1046  fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
1047  }
1048  }
1049  } else {
1050  free_representation(rep);
1051  rep = NULL;
1052  av_log(s, AV_LOG_ERROR, "Unknown format of Representation node id[%s] \n", (const char *)rep_id_val);
1053  }
1054 
1055  if (rep) {
1056  if (rep->fragment_duration > 0 && !rep->fragment_timescale)
1057  rep->fragment_timescale = 1;
1058  rep->bandwidth = rep_bandwidth_val ? atoi(rep_bandwidth_val) : 0;
1059  strncpy(rep->id, rep_id_val ? rep_id_val : "", sizeof(rep->id));
1060  rep->framerate = av_make_q(0, 0);
1061  if (type == AVMEDIA_TYPE_VIDEO && rep_framerate_val) {
1062  ret = av_parse_video_rate(&rep->framerate, rep_framerate_val);
1063  if (ret < 0)
1064  av_log(s, AV_LOG_VERBOSE, "Ignoring invalid frame rate '%s'\n", rep_framerate_val);
1065  }
1066 
1067  switch (type) {
1068  case AVMEDIA_TYPE_VIDEO:
1069  rep->rep_idx = video_rep_idx;
1070  dynarray_add(&c->videos, &c->n_videos, rep);
1071  break;
1072  case AVMEDIA_TYPE_AUDIO:
1073  rep->rep_idx = audio_rep_idx;
1074  dynarray_add(&c->audios, &c->n_audios, rep);
1075  break;
1076  case AVMEDIA_TYPE_SUBTITLE:
1077  rep->rep_idx = subtitle_rep_idx;
1078  dynarray_add(&c->subtitles, &c->n_subtitles, rep);
1079  break;
1080  default:
1081  av_log(s, AV_LOG_WARNING, "Unsupported the stream type %d\n", type);
1082  break;
1083  }
1084  }
1085  }
1086 
1087  video_rep_idx += type == AVMEDIA_TYPE_VIDEO;
1088  audio_rep_idx += type == AVMEDIA_TYPE_AUDIO;
1089  subtitle_rep_idx += type == AVMEDIA_TYPE_SUBTITLE;
1090 
1091 end:
1092  if (rep_id_val)
1093  xmlFree(rep_id_val);
1094  if (rep_bandwidth_val)
1095  xmlFree(rep_bandwidth_val);
1096  if (rep_framerate_val)
1097  xmlFree(rep_framerate_val);
1098 
1099  return ret;
1100 }
1101 
1103  xmlNodePtr adaptionset_node,
1104  xmlNodePtr mpd_baseurl_node,
1105  xmlNodePtr period_baseurl_node,
1106  xmlNodePtr period_segmenttemplate_node,
1107  xmlNodePtr period_segmentlist_node)
1108 {
1109  int ret = 0;
1110  DASHContext *c = s->priv_data;
1111  xmlNodePtr fragment_template_node = NULL;
1112  xmlNodePtr content_component_node = NULL;
1113  xmlNodePtr adaptionset_baseurl_node = NULL;
1114  xmlNodePtr adaptionset_segmentlist_node = NULL;
1115  xmlNodePtr adaptionset_supplementalproperty_node = NULL;
1116  xmlNodePtr node = NULL;
1117  c->adaptionset_contenttype_val = xmlGetProp(adaptionset_node, "contentType");
1118  c->adaptionset_par_val = xmlGetProp(adaptionset_node, "par");
1119  c->adaptionset_lang_val = xmlGetProp(adaptionset_node, "lang");
1120  c->adaptionset_minbw_val = xmlGetProp(adaptionset_node, "minBandwidth");
1121  c->adaptionset_maxbw_val = xmlGetProp(adaptionset_node, "maxBandwidth");
1122  c->adaptionset_minwidth_val = xmlGetProp(adaptionset_node, "minWidth");
1123  c->adaptionset_maxwidth_val = xmlGetProp(adaptionset_node, "maxWidth");
1124  c->adaptionset_minheight_val = xmlGetProp(adaptionset_node, "minHeight");
1125  c->adaptionset_maxheight_val = xmlGetProp(adaptionset_node, "maxHeight");
1126  c->adaptionset_minframerate_val = xmlGetProp(adaptionset_node, "minFrameRate");
1127  c->adaptionset_maxframerate_val = xmlGetProp(adaptionset_node, "maxFrameRate");
1128  c->adaptionset_segmentalignment_val = xmlGetProp(adaptionset_node, "segmentAlignment");
1129  c->adaptionset_bitstreamswitching_val = xmlGetProp(adaptionset_node, "bitstreamSwitching");
1130 
1131  node = xmlFirstElementChild(adaptionset_node);
1132  while (node) {
1133  if (!av_strcasecmp(node->name, (const char *)"SegmentTemplate")) {
1134  fragment_template_node = node;
1135  } else if (!av_strcasecmp(node->name, (const char *)"ContentComponent")) {
1136  content_component_node = node;
1137  } else if (!av_strcasecmp(node->name, (const char *)"BaseURL")) {
1138  adaptionset_baseurl_node = node;
1139  } else if (!av_strcasecmp(node->name, (const char *)"SegmentList")) {
1140  adaptionset_segmentlist_node = node;
1141  } else if (!av_strcasecmp(node->name, (const char *)"SupplementalProperty")) {
1142  adaptionset_supplementalproperty_node = node;
1143  } else if (!av_strcasecmp(node->name, (const char *)"Representation")) {
1144  ret = parse_manifest_representation(s, url, node,
1145  adaptionset_node,
1146  mpd_baseurl_node,
1147  period_baseurl_node,
1148  period_segmenttemplate_node,
1149  period_segmentlist_node,
1150  fragment_template_node,
1151  content_component_node,
1152  adaptionset_baseurl_node,
1153  adaptionset_segmentlist_node,
1154  adaptionset_supplementalproperty_node);
1155  if (ret < 0) {
1156  return ret;
1157  }
1158  }
1159  node = xmlNextElementSibling(node);
1160  }
1161  return 0;
1162 }
1163 
1164 static int parse_manifest(AVFormatContext *s, const char *url, AVIOContext *in)
1165 {
1166  DASHContext *c = s->priv_data;
1167  int ret = 0;
1168  int close_in = 0;
1169  uint8_t *new_url = NULL;
1170  int64_t filesize = 0;
1171  char *buffer = NULL;
1172  AVDictionary *opts = NULL;
1173  xmlDoc *doc = NULL;
1174  xmlNodePtr root_element = NULL;
1175  xmlNodePtr node = NULL;
1176  xmlNodePtr period_node = NULL;
1177  xmlNodePtr tmp_node = NULL;
1178  xmlNodePtr mpd_baseurl_node = NULL;
1179  xmlNodePtr period_baseurl_node = NULL;
1180  xmlNodePtr period_segmenttemplate_node = NULL;
1181  xmlNodePtr period_segmentlist_node = NULL;
1182  xmlNodePtr adaptionset_node = NULL;
1183  xmlAttrPtr attr = NULL;
1184  char *val = NULL;
1185  uint32_t period_duration_sec = 0;
1186  uint32_t period_start_sec = 0;
1187 
1188  if (!in) {
1189  close_in = 1;
1190 
1191  av_dict_copy(&opts, c->avio_opts, 0);
1192  ret = avio_open2(&in, url, AVIO_FLAG_READ, c->interrupt_callback, &opts);
1193  av_dict_free(&opts);
1194  if (ret < 0)
1195  return ret;
1196  }
1197 
1198  if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0) {
1199  c->base_url = av_strdup(new_url);
1200  } else {
1201  c->base_url = av_strdup(url);
1202  }
1203 
1204  filesize = avio_size(in);
1205  if (filesize <= 0) {
1206  filesize = 8 * 1024;
1207  }
1208 
1209  buffer = av_mallocz(filesize);
1210  if (!buffer) {
1211  av_free(c->base_url);
1212  return AVERROR(ENOMEM);
1213  }
1214 
1215  filesize = avio_read(in, buffer, filesize);
1216  if (filesize <= 0) {
1217  av_log(s, AV_LOG_ERROR, "Unable to read to offset '%s'\n", url);
1218  ret = AVERROR_INVALIDDATA;
1219  } else {
1220  LIBXML_TEST_VERSION
1221 
1222  doc = xmlReadMemory(buffer, filesize, c->base_url, NULL, 0);
1223  root_element = xmlDocGetRootElement(doc);
1224  node = root_element;
1225 
1226  if (!node) {
1227  ret = AVERROR_INVALIDDATA;
1228  av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing root node\n", url);
1229  goto cleanup;
1230  }
1231 
1232  if (node->type != XML_ELEMENT_NODE ||
1233  av_strcasecmp(node->name, (const char *)"MPD")) {
1234  ret = AVERROR_INVALIDDATA;
1235  av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - wrong root node name[%s] type[%d]\n", url, node->name, (int)node->type);
1236  goto cleanup;
1237  }
1238 
1239  val = xmlGetProp(node, "type");
1240  if (!val) {
1241  av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing type attrib\n", url);
1242  ret = AVERROR_INVALIDDATA;
1243  goto cleanup;
1244  }
1245  if (!av_strcasecmp(val, (const char *)"dynamic"))
1246  c->is_live = 1;
1247  xmlFree(val);
1248 
1249  attr = node->properties;
1250  while (attr) {
1251  val = xmlGetProp(node, attr->name);
1252 
1253  if (!av_strcasecmp(attr->name, (const char *)"availabilityStartTime")) {
1254  c->availability_start_time = get_utc_date_time_insec(s, (const char *)val);
1255  av_log(s, AV_LOG_TRACE, "c->availability_start_time = [%"PRId64"]\n", c->availability_start_time);
1256  } else if (!av_strcasecmp(attr->name, (const char *)"availabilityEndTime")) {
1257  c->availability_end_time = get_utc_date_time_insec(s, (const char *)val);
1258  av_log(s, AV_LOG_TRACE, "c->availability_end_time = [%"PRId64"]\n", c->availability_end_time);
1259  } else if (!av_strcasecmp(attr->name, (const char *)"publishTime")) {
1260  c->publish_time = get_utc_date_time_insec(s, (const char *)val);
1261  av_log(s, AV_LOG_TRACE, "c->publish_time = [%"PRId64"]\n", c->publish_time);
1262  } else if (!av_strcasecmp(attr->name, (const char *)"minimumUpdatePeriod")) {
1263  c->minimum_update_period = get_duration_insec(s, (const char *)val);
1264  av_log(s, AV_LOG_TRACE, "c->minimum_update_period = [%"PRId64"]\n", c->minimum_update_period);
1265  } else if (!av_strcasecmp(attr->name, (const char *)"timeShiftBufferDepth")) {
1266  c->time_shift_buffer_depth = get_duration_insec(s, (const char *)val);
1267  av_log(s, AV_LOG_TRACE, "c->time_shift_buffer_depth = [%"PRId64"]\n", c->time_shift_buffer_depth);
1268  } else if (!av_strcasecmp(attr->name, (const char *)"minBufferTime")) {
1269  c->min_buffer_time = get_duration_insec(s, (const char *)val);
1270  av_log(s, AV_LOG_TRACE, "c->min_buffer_time = [%"PRId64"]\n", c->min_buffer_time);
1271  } else if (!av_strcasecmp(attr->name, (const char *)"suggestedPresentationDelay")) {
1272  c->suggested_presentation_delay = get_duration_insec(s, (const char *)val);
1273  av_log(s, AV_LOG_TRACE, "c->suggested_presentation_delay = [%"PRId64"]\n", c->suggested_presentation_delay);
1274  } else if (!av_strcasecmp(attr->name, (const char *)"mediaPresentationDuration")) {
1275  c->media_presentation_duration = get_duration_insec(s, (const char *)val);
1276  av_log(s, AV_LOG_TRACE, "c->media_presentation_duration = [%"PRId64"]\n", c->media_presentation_duration);
1277  }
1278  attr = attr->next;
1279  xmlFree(val);
1280  }
1281 
1282  tmp_node = find_child_node_by_name(node, "BaseURL");
1283  if (tmp_node) {
1284  mpd_baseurl_node = xmlCopyNode(tmp_node,1);
1285  } else {
1286  mpd_baseurl_node = xmlNewNode(NULL, "BaseURL");
1287  }
1288 
1289  // at now we can handle only one period, with the longest duration
1290  node = xmlFirstElementChild(node);
1291  while (node) {
1292  if (!av_strcasecmp(node->name, (const char *)"Period")) {
1293  period_duration_sec = 0;
1294  period_start_sec = 0;
1295  attr = node->properties;
1296  while (attr) {
1297  val = xmlGetProp(node, attr->name);
1298  if (!av_strcasecmp(attr->name, (const char *)"duration")) {
1299  period_duration_sec = get_duration_insec(s, (const char *)val);
1300  } else if (!av_strcasecmp(attr->name, (const char *)"start")) {
1301  period_start_sec = get_duration_insec(s, (const char *)val);
1302  }
1303  attr = attr->next;
1304  xmlFree(val);
1305  }
1306  if ((period_duration_sec) >= (c->period_duration)) {
1307  period_node = node;
1308  c->period_duration = period_duration_sec;
1309  c->period_start = period_start_sec;
1310  if (c->period_start > 0)
1312  }
1313  }
1314  node = xmlNextElementSibling(node);
1315  }
1316  if (!period_node) {
1317  av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing Period node\n", url);
1318  ret = AVERROR_INVALIDDATA;
1319  goto cleanup;
1320  }
1321 
1322  adaptionset_node = xmlFirstElementChild(period_node);
1323  while (adaptionset_node) {
1324  if (!av_strcasecmp(adaptionset_node->name, (const char *)"BaseURL")) {
1325  period_baseurl_node = adaptionset_node;
1326  } else if (!av_strcasecmp(adaptionset_node->name, (const char *)"SegmentTemplate")) {
1327  period_segmenttemplate_node = adaptionset_node;
1328  } else if (!av_strcasecmp(adaptionset_node->name, (const char *)"SegmentList")) {
1329  period_segmentlist_node = adaptionset_node;
1330  } else if (!av_strcasecmp(adaptionset_node->name, (const char *)"AdaptationSet")) {
1331  parse_manifest_adaptationset(s, url, adaptionset_node, mpd_baseurl_node, period_baseurl_node, period_segmenttemplate_node, period_segmentlist_node);
1332  }
1333  adaptionset_node = xmlNextElementSibling(adaptionset_node);
1334  }
1335 cleanup:
1336  /*free the document */
1337  xmlFreeDoc(doc);
1338  xmlCleanupParser();
1339  xmlFreeNode(mpd_baseurl_node);
1340  }
1341 
1342  av_free(new_url);
1343  av_free(buffer);
1344  if (close_in) {
1345  avio_close(in);
1346  }
1347  return ret;
1348 }
1349 
1350 static int64_t calc_cur_seg_no(AVFormatContext *s, struct representation *pls)
1351 {
1352  DASHContext *c = s->priv_data;
1353  int64_t num = 0;
1354  int64_t start_time_offset = 0;
1355 
1356  if (c->is_live) {
1357  if (pls->n_fragments) {
1358  av_log(s, AV_LOG_TRACE, "in n_fragments mode\n");
1359  num = pls->first_seq_no;
1360  } else if (pls->n_timelines) {
1361  av_log(s, AV_LOG_TRACE, "in n_timelines mode\n");
1362  start_time_offset = get_segment_start_time_based_on_timeline(pls, 0xFFFFFFFF) - 60 * pls->fragment_timescale; // 60 seconds before end
1363  num = calc_next_seg_no_from_timelines(pls, start_time_offset);
1364  if (num == -1)
1365  num = pls->first_seq_no;
1366  else
1367  num += pls->first_seq_no;
1368  } else if (pls->fragment_duration){
1369  av_log(s, AV_LOG_TRACE, "in fragment_duration mode fragment_timescale = %"PRId64", presentation_timeoffset = %"PRId64"\n", pls->fragment_timescale, pls->presentation_timeoffset);
1370  if (pls->presentation_timeoffset) {
1372  } else if (c->publish_time > 0 && !c->availability_start_time) {
1373  if (c->min_buffer_time) {
1375  } else {
1377  }
1378  } else {
1380  }
1381  }
1382  } else {
1383  num = pls->first_seq_no;
1384  }
1385  return num;
1386 }
1387 
1388 static int64_t calc_min_seg_no(AVFormatContext *s, struct representation *pls)
1389 {
1390  DASHContext *c = s->priv_data;
1391  int64_t num = 0;
1392 
1393  if (c->is_live && pls->fragment_duration) {
1394  av_log(s, AV_LOG_TRACE, "in live mode\n");
1396  } else {
1397  num = pls->first_seq_no;
1398  }
1399  return num;
1400 }
1401 
1402 static int64_t calc_max_seg_no(struct representation *pls, DASHContext *c)
1403 {
1404  int64_t num = 0;
1405 
1406  if (pls->n_fragments) {
1407  num = pls->first_seq_no + pls->n_fragments - 1;
1408  } else if (pls->n_timelines) {
1409  int i = 0;
1410  num = pls->first_seq_no + pls->n_timelines - 1;
1411  for (i = 0; i < pls->n_timelines; i++) {
1412  if (pls->timelines[i]->repeat == -1) {
1413  int length_of_each_segment = pls->timelines[i]->duration / pls->fragment_timescale;
1414  num = c->period_duration / length_of_each_segment;
1415  } else {
1416  num += pls->timelines[i]->repeat;
1417  }
1418  }
1419  } else if (c->is_live && pls->fragment_duration) {
1421  } else if (pls->fragment_duration) {
1423  }
1424 
1425  return num;
1426 }
1427 
1428 static void move_timelines(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
1429 {
1430  if (rep_dest && rep_src ) {
1431  free_timelines_list(rep_dest);
1432  rep_dest->timelines = rep_src->timelines;
1433  rep_dest->n_timelines = rep_src->n_timelines;
1434  rep_dest->first_seq_no = rep_src->first_seq_no;
1435  rep_dest->last_seq_no = calc_max_seg_no(rep_dest, c);
1436  rep_src->timelines = NULL;
1437  rep_src->n_timelines = 0;
1438  rep_dest->cur_seq_no = rep_src->cur_seq_no;
1439  }
1440 }
1441 
1442 static void move_segments(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
1443 {
1444  if (rep_dest && rep_src ) {
1445  free_fragment_list(rep_dest);
1446  if (rep_src->start_number > (rep_dest->start_number + rep_dest->n_fragments))
1447  rep_dest->cur_seq_no = 0;
1448  else
1449  rep_dest->cur_seq_no += rep_src->start_number - rep_dest->start_number;
1450  rep_dest->fragments = rep_src->fragments;
1451  rep_dest->n_fragments = rep_src->n_fragments;
1452  rep_dest->parent = rep_src->parent;
1453  rep_dest->last_seq_no = calc_max_seg_no(rep_dest, c);
1454  rep_src->fragments = NULL;
1455  rep_src->n_fragments = 0;
1456  }
1457 }
1458 
1459 
1461 {
1462 
1463  int ret = 0, i;
1464  DASHContext *c = s->priv_data;
1465 
1466  // save current context
1467  int n_videos = c->n_videos;
1468  struct representation **videos = c->videos;
1469  int n_audios = c->n_audios;
1470  struct representation **audios = c->audios;
1471  int n_subtitles = c->n_subtitles;
1472  struct representation **subtitles = c->subtitles;
1473  char *base_url = c->base_url;
1474 
1475  c->base_url = NULL;
1476  c->n_videos = 0;
1477  c->videos = NULL;
1478  c->n_audios = 0;
1479  c->audios = NULL;
1480  c->n_subtitles = 0;
1481  c->subtitles = NULL;
1482  ret = parse_manifest(s, s->url, NULL);
1483  if (ret)
1484  goto finish;
1485 
1486  if (c->n_videos != n_videos) {
1487  av_log(c, AV_LOG_ERROR,
1488  "new manifest has mismatched no. of video representations, %d -> %d\n",
1489  n_videos, c->n_videos);
1490  return AVERROR_INVALIDDATA;
1491  }
1492  if (c->n_audios != n_audios) {
1493  av_log(c, AV_LOG_ERROR,
1494  "new manifest has mismatched no. of audio representations, %d -> %d\n",
1495  n_audios, c->n_audios);
1496  return AVERROR_INVALIDDATA;
1497  }
1498  if (c->n_subtitles != n_subtitles) {
1499  av_log(c, AV_LOG_ERROR,
1500  "new manifest has mismatched no. of subtitles representations, %d -> %d\n",
1501  n_subtitles, c->n_subtitles);
1502  return AVERROR_INVALIDDATA;
1503  }
1504 
1505  for (i = 0; i < n_videos; i++) {
1506  struct representation *cur_video = videos[i];
1507  struct representation *ccur_video = c->videos[i];
1508  if (cur_video->timelines) {
1509  // calc current time
1510  int64_t currentTime = get_segment_start_time_based_on_timeline(cur_video, cur_video->cur_seq_no) / cur_video->fragment_timescale;
1511  // update segments
1512  ccur_video->cur_seq_no = calc_next_seg_no_from_timelines(ccur_video, currentTime * cur_video->fragment_timescale - 1);
1513  if (ccur_video->cur_seq_no >= 0) {
1514  move_timelines(ccur_video, cur_video, c);
1515  }
1516  }
1517  if (cur_video->fragments) {
1518  move_segments(ccur_video, cur_video, c);
1519  }
1520  }
1521  for (i = 0; i < n_audios; i++) {
1522  struct representation *cur_audio = audios[i];
1523  struct representation *ccur_audio = c->audios[i];
1524  if (cur_audio->timelines) {
1525  // calc current time
1526  int64_t currentTime = get_segment_start_time_based_on_timeline(cur_audio, cur_audio->cur_seq_no) / cur_audio->fragment_timescale;
1527  // update segments
1528  ccur_audio->cur_seq_no = calc_next_seg_no_from_timelines(ccur_audio, currentTime * cur_audio->fragment_timescale - 1);
1529  if (ccur_audio->cur_seq_no >= 0) {
1530  move_timelines(ccur_audio, cur_audio, c);
1531  }
1532  }
1533  if (cur_audio->fragments) {
1534  move_segments(ccur_audio, cur_audio, c);
1535  }
1536  }
1537 
1538 finish:
1539  // restore context
1540  if (c->base_url)
1541  av_free(base_url);
1542  else
1543  c->base_url = base_url;
1544 
1545  if (c->subtitles)
1546  free_subtitle_list(c);
1547  if (c->audios)
1548  free_audio_list(c);
1549  if (c->videos)
1550  free_video_list(c);
1551 
1552  c->n_subtitles = n_subtitles;
1553  c->subtitles = subtitles;
1554  c->n_audios = n_audios;
1555  c->audios = audios;
1556  c->n_videos = n_videos;
1557  c->videos = videos;
1558  return ret;
1559 }
1560 
1561 static struct fragment *get_current_fragment(struct representation *pls)
1562 {
1563  int64_t min_seq_no = 0;
1564  int64_t max_seq_no = 0;
1565  struct fragment *seg = NULL;
1566  struct fragment *seg_ptr = NULL;
1567  DASHContext *c = pls->parent->priv_data;
1568 
1569  while (( !ff_check_interrupt(c->interrupt_callback)&& pls->n_fragments > 0)) {
1570  if (pls->cur_seq_no < pls->n_fragments) {
1571  seg_ptr = pls->fragments[pls->cur_seq_no];
1572  seg = av_mallocz(sizeof(struct fragment));
1573  if (!seg) {
1574  return NULL;
1575  }
1576  seg->url = av_strdup(seg_ptr->url);
1577  if (!seg->url) {
1578  av_free(seg);
1579  return NULL;
1580  }
1581  seg->size = seg_ptr->size;
1582  seg->url_offset = seg_ptr->url_offset;
1583  return seg;
1584  } else if (c->is_live) {
1585  refresh_manifest(pls->parent);
1586  } else {
1587  break;
1588  }
1589  }
1590  if (c->is_live) {
1591  min_seq_no = calc_min_seg_no(pls->parent, pls);
1592  max_seq_no = calc_max_seg_no(pls, c);
1593 
1594  if (pls->timelines || pls->fragments) {
1595  refresh_manifest(pls->parent);
1596  }
1597  if (pls->cur_seq_no <= min_seq_no) {
1598  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);
1599  pls->cur_seq_no = calc_cur_seg_no(pls->parent, pls);
1600  } else if (pls->cur_seq_no > max_seq_no) {
1601  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);
1602  }
1603  seg = av_mallocz(sizeof(struct fragment));
1604  if (!seg) {
1605  return NULL;
1606  }
1607  } else if (pls->cur_seq_no <= pls->last_seq_no) {
1608  seg = av_mallocz(sizeof(struct fragment));
1609  if (!seg) {
1610  return NULL;
1611  }
1612  }
1613  if (seg) {
1614  char *tmpfilename= av_mallocz(c->max_url_size);
1615  if (!tmpfilename) {
1616  return NULL;
1617  }
1619  seg->url = av_strireplace(pls->url_template, pls->url_template, tmpfilename);
1620  if (!seg->url) {
1621  av_log(pls->parent, AV_LOG_WARNING, "Unable to resolve template url '%s', try to use origin template\n", pls->url_template);
1622  seg->url = av_strdup(pls->url_template);
1623  if (!seg->url) {
1624  av_log(pls->parent, AV_LOG_ERROR, "Cannot resolve template url '%s'\n", pls->url_template);
1625  av_free(tmpfilename);
1626  return NULL;
1627  }
1628  }
1629  av_free(tmpfilename);
1630  seg->size = -1;
1631  }
1632 
1633  return seg;
1634 }
1635 
1636 static int read_from_url(struct representation *pls, struct fragment *seg,
1637  uint8_t *buf, int buf_size)
1638 {
1639  int ret;
1640 
1641  /* limit read if the fragment was only a part of a file */
1642  if (seg->size >= 0)
1643  buf_size = FFMIN(buf_size, pls->cur_seg_size - pls->cur_seg_offset);
1644 
1645  ret = avio_read(pls->input, buf, buf_size);
1646  if (ret > 0)
1647  pls->cur_seg_offset += ret;
1648 
1649  return ret;
1650 }
1651 
1652 static int open_input(DASHContext *c, struct representation *pls, struct fragment *seg)
1653 {
1654  AVDictionary *opts = NULL;
1655  char *url = NULL;
1656  int ret = 0;
1657 
1658  url = av_mallocz(c->max_url_size);
1659  if (!url) {
1660  goto cleanup;
1661  }
1662 
1663  if (seg->size >= 0) {
1664  /* try to restrict the HTTP request to the part we want
1665  * (if this is in fact a HTTP request) */
1666  av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1667  av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1668  }
1669 
1670  ff_make_absolute_url(url, c->max_url_size, c->base_url, seg->url);
1671  av_log(pls->parent, AV_LOG_VERBOSE, "DASH request for url '%s', offset %"PRId64", playlist %d\n",
1672  url, seg->url_offset, pls->rep_idx);
1673  ret = open_url(pls->parent, &pls->input, url, c->avio_opts, opts, NULL);
1674  if (ret < 0) {
1675  goto cleanup;
1676  }
1677 
1678 cleanup:
1679  av_free(url);
1680  av_dict_free(&opts);
1681  pls->cur_seg_offset = 0;
1682  pls->cur_seg_size = seg->size;
1683  return ret;
1684 }
1685 
1686 static int update_init_section(struct representation *pls)
1687 {
1688  static const int max_init_section_size = 1024 * 1024;
1689  DASHContext *c = pls->parent->priv_data;
1690  int64_t sec_size;
1691  int64_t urlsize;
1692  int ret;
1693 
1694  if (!pls->init_section || pls->init_sec_buf)
1695  return 0;
1696 
1697  ret = open_input(c, pls, pls->init_section);
1698  if (ret < 0) {
1700  "Failed to open an initialization section in playlist %d\n",
1701  pls->rep_idx);
1702  return ret;
1703  }
1704 
1705  if (pls->init_section->size >= 0)
1706  sec_size = pls->init_section->size;
1707  else if ((urlsize = avio_size(pls->input)) >= 0)
1708  sec_size = urlsize;
1709  else
1710  sec_size = max_init_section_size;
1711 
1712  av_log(pls->parent, AV_LOG_DEBUG,
1713  "Downloading an initialization section of size %"PRId64"\n",
1714  sec_size);
1715 
1716  sec_size = FFMIN(sec_size, max_init_section_size);
1717 
1718  av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1719 
1720  ret = read_from_url(pls, pls->init_section, pls->init_sec_buf,
1721  pls->init_sec_buf_size);
1722  ff_format_io_close(pls->parent, &pls->input);
1723 
1724  if (ret < 0)
1725  return ret;
1726 
1727  pls->init_sec_data_len = ret;
1728  pls->init_sec_buf_read_offset = 0;
1729 
1730  return 0;
1731 }
1732 
1733 static int64_t seek_data(void *opaque, int64_t offset, int whence)
1734 {
1735  struct representation *v = opaque;
1736  if (v->n_fragments && !v->init_sec_data_len) {
1737  return avio_seek(v->input, offset, whence);
1738  }
1739 
1740  return AVERROR(ENOSYS);
1741 }
1742 
1743 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1744 {
1745  int ret = 0;
1746  struct representation *v = opaque;
1747  DASHContext *c = v->parent->priv_data;
1748 
1749 restart:
1750  if (!v->input) {
1751  free_fragment(&v->cur_seg);
1752  v->cur_seg = get_current_fragment(v);
1753  if (!v->cur_seg) {
1754  ret = AVERROR_EOF;
1755  goto end;
1756  }
1757 
1758  /* load/update Media Initialization Section, if any */
1759  ret = update_init_section(v);
1760  if (ret)
1761  goto end;
1762 
1763  ret = open_input(c, v, v->cur_seg);
1764  if (ret < 0) {
1766  goto end;
1767  ret = AVERROR_EXIT;
1768  }
1769  av_log(v->parent, AV_LOG_WARNING, "Failed to open fragment of playlist %d\n", v->rep_idx);
1770  v->cur_seq_no++;
1771  goto restart;
1772  }
1773  }
1774 
1776  /* Push init section out first before first actual fragment */
1777  int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1778  memcpy(buf, v->init_sec_buf, copy_size);
1779  v->init_sec_buf_read_offset += copy_size;
1780  ret = copy_size;
1781  goto end;
1782  }
1783 
1784  /* check the v->cur_seg, if it is null, get current and double check if the new v->cur_seg*/
1785  if (!v->cur_seg) {
1786  v->cur_seg = get_current_fragment(v);
1787  }
1788  if (!v->cur_seg) {
1789  ret = AVERROR_EOF;
1790  goto end;
1791  }
1792  ret = read_from_url(v, v->cur_seg, buf, buf_size);
1793  if (ret > 0)
1794  goto end;
1795 
1796  if (c->is_live || v->cur_seq_no < v->last_seq_no) {
1797  if (!v->is_restart_needed)
1798  v->cur_seq_no++;
1799  v->is_restart_needed = 1;
1800  }
1801 
1802 end:
1803  return ret;
1804 }
1805 
1807 {
1808  DASHContext *c = s->priv_data;
1809  const char *opts[] = { "headers", "user_agent", "cookies", NULL }, **opt = opts;
1810  uint8_t *buf = NULL;
1811  int ret = 0;
1812 
1813  while (*opt) {
1814  if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >= 0) {
1815  if (buf[0] != '\0') {
1816  ret = av_dict_set(&c->avio_opts, *opt, buf, AV_DICT_DONT_STRDUP_VAL);
1817  if (ret < 0) {
1818  av_freep(&buf);
1819  return ret;
1820  }
1821  } else {
1822  av_freep(&buf);
1823  }
1824  }
1825  opt++;
1826  }
1827 
1828  return ret;
1829 }
1830 
1831 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1832  int flags, AVDictionary **opts)
1833 {
1834  av_log(s, AV_LOG_ERROR,
1835  "A DASH playlist item '%s' referred to an external file '%s'. "
1836  "Opening this file was forbidden for security reasons\n",
1837  s->url, url);
1838  return AVERROR(EPERM);
1839 }
1840 
1842 {
1843  /* note: the internal buffer could have changed */
1844  av_freep(&pls->pb.buffer);
1845  memset(&pls->pb, 0x00, sizeof(AVIOContext));
1846  pls->ctx->pb = NULL;
1847  avformat_close_input(&pls->ctx);
1848  pls->ctx = NULL;
1849 }
1850 
1852 {
1853  DASHContext *c = s->priv_data;
1854  AVInputFormat *in_fmt = NULL;
1855  AVDictionary *in_fmt_opts = NULL;
1856  uint8_t *avio_ctx_buffer = NULL;
1857  int ret = 0, i;
1858 
1859  if (pls->ctx) {
1861  }
1862 
1864  ret = AVERROR_EXIT;
1865  goto fail;
1866  }
1867 
1868  if (!(pls->ctx = avformat_alloc_context())) {
1869  ret = AVERROR(ENOMEM);
1870  goto fail;
1871  }
1872 
1873  avio_ctx_buffer = av_malloc(INITIAL_BUFFER_SIZE);
1874  if (!avio_ctx_buffer ) {
1875  ret = AVERROR(ENOMEM);
1876  avformat_free_context(pls->ctx);
1877  pls->ctx = NULL;
1878  goto fail;
1879  }
1880  if (c->is_live) {
1881  ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, NULL);
1882  } else {
1883  ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, seek_data);
1884  }
1885  pls->pb.seekable = 0;
1886 
1887  if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
1888  goto fail;
1889 
1890  pls->ctx->flags = AVFMT_FLAG_CUSTOM_IO;
1891  pls->ctx->probesize = 1024 * 4;
1893  ret = av_probe_input_buffer(&pls->pb, &in_fmt, "", NULL, 0, 0);
1894  if (ret < 0) {
1895  av_log(s, AV_LOG_ERROR, "Error when loading first fragment, playlist %d\n", (int)pls->rep_idx);
1896  avformat_free_context(pls->ctx);
1897  pls->ctx = NULL;
1898  goto fail;
1899  }
1900 
1901  pls->ctx->pb = &pls->pb;
1902  pls->ctx->io_open = nested_io_open;
1903 
1904  // provide additional information from mpd if available
1905  ret = avformat_open_input(&pls->ctx, "", in_fmt, &in_fmt_opts); //pls->init_section->url
1906  av_dict_free(&in_fmt_opts);
1907  if (ret < 0)
1908  goto fail;
1909  if (pls->n_fragments) {
1910 #if FF_API_R_FRAME_RATE
1911  if (pls->framerate.den) {
1912  for (i = 0; i < pls->ctx->nb_streams; i++)
1913  pls->ctx->streams[i]->r_frame_rate = pls->framerate;
1914  }
1915 #endif
1916 
1917  ret = avformat_find_stream_info(pls->ctx, NULL);
1918  if (ret < 0)
1919  goto fail;
1920  }
1921 
1922 fail:
1923  return ret;
1924 }
1925 
1927 {
1928  int ret = 0;
1929  int i;
1930 
1931  pls->parent = s;
1932  pls->cur_seq_no = calc_cur_seg_no(s, pls);
1933 
1934  if (!pls->last_seq_no) {
1935  pls->last_seq_no = calc_max_seg_no(pls, s->priv_data);
1936  }
1937 
1938  ret = reopen_demux_for_component(s, pls);
1939  if (ret < 0) {
1940  goto fail;
1941  }
1942  for (i = 0; i < pls->ctx->nb_streams; i++) {
1943  AVStream *st = avformat_new_stream(s, NULL);
1944  AVStream *ist = pls->ctx->streams[i];
1945  if (!st) {
1946  ret = AVERROR(ENOMEM);
1947  goto fail;
1948  }
1949  st->id = i;
1952  }
1953 
1954  return 0;
1955 fail:
1956  return ret;
1957 }
1958 
1959 static int is_common_init_section_exist(struct representation **pls, int n_pls)
1960 {
1961  struct fragment *first_init_section = pls[0]->init_section;
1962  char *url =NULL;
1963  int64_t url_offset = -1;
1964  int64_t size = -1;
1965  int i = 0;
1966 
1967  if (first_init_section == NULL || n_pls == 0)
1968  return 0;
1969 
1970  url = first_init_section->url;
1971  url_offset = first_init_section->url_offset;
1972  size = pls[0]->init_section->size;
1973  for (i=0;i<n_pls;i++) {
1974  if (av_strcasecmp(pls[i]->init_section->url,url) || pls[i]->init_section->url_offset != url_offset || pls[i]->init_section->size != size) {
1975  return 0;
1976  }
1977  }
1978  return 1;
1979 }
1980 
1981 static void copy_init_section(struct representation *rep_dest, struct representation *rep_src)
1982 {
1983  rep_dest->init_sec_buf = av_mallocz(rep_src->init_sec_buf_size);
1984  memcpy(rep_dest->init_sec_buf, rep_src->init_sec_buf, rep_src->init_sec_data_len);
1985  rep_dest->init_sec_buf_size = rep_src->init_sec_buf_size;
1986  rep_dest->init_sec_data_len = rep_src->init_sec_data_len;
1987  rep_dest->cur_timestamp = rep_src->cur_timestamp;
1988 }
1989 
1990 
1992 {
1993  DASHContext *c = s->priv_data;
1994  int ret = 0;
1995  int stream_index = 0;
1996  int i;
1997 
1999 
2000  if ((ret = save_avio_options(s)) < 0)
2001  goto fail;
2002 
2003  av_dict_set(&c->avio_opts, "seekable", "0", 0);
2004 
2005  if ((ret = parse_manifest(s, s->url, s->pb)) < 0)
2006  goto fail;
2007 
2008  /* If this isn't a live stream, fill the total duration of the
2009  * stream. */
2010  if (!c->is_live) {
2012  }
2013 
2014  if(c->n_videos)
2016 
2017  /* Open the demuxer for video and audio components if available */
2018  for (i = 0; i < c->n_videos; i++) {
2019  struct representation *cur_video = c->videos[i];
2020  if (i > 0 && c->is_init_section_common_video) {
2021  copy_init_section(cur_video,c->videos[0]);
2022  }
2023  ret = open_demux_for_component(s, cur_video);
2024 
2025  if (ret)
2026  goto fail;
2027  cur_video->stream_index = stream_index;
2028  ++stream_index;
2029  }
2030 
2031  if(c->n_audios)
2033 
2034  for (i = 0; i < c->n_audios; i++) {
2035  struct representation *cur_audio = c->audios[i];
2036  if (i > 0 && c->is_init_section_common_audio) {
2037  copy_init_section(cur_audio,c->audios[0]);
2038  }
2039  ret = open_demux_for_component(s, cur_audio);
2040 
2041  if (ret)
2042  goto fail;
2043  cur_audio->stream_index = stream_index;
2044  ++stream_index;
2045  }
2046 
2047  if (c->n_subtitles)
2049 
2050  for (i = 0; i < c->n_subtitles; i++) {
2051  struct representation *cur_subtitle = c->subtitles[i];
2052  if (i > 0 && c->is_init_section_common_audio) {
2053  copy_init_section(cur_subtitle,c->subtitles[0]);
2054  }
2055  ret = open_demux_for_component(s, cur_subtitle);
2056 
2057  if (ret)
2058  goto fail;
2059  cur_subtitle->stream_index = stream_index;
2060  ++stream_index;
2061  }
2062 
2063 
2064  if (!stream_index) {
2065  ret = AVERROR_INVALIDDATA;
2066  goto fail;
2067  }
2068 
2069  /* Create a program */
2070  if (!ret) {
2071  AVProgram *program;
2072  program = av_new_program(s, 0);
2073  if (!program) {
2074  goto fail;
2075  }
2076 
2077  for (i = 0; i < c->n_videos; i++) {
2078  struct representation *pls = c->videos[i];
2079 
2081  pls->assoc_stream = s->streams[pls->stream_index];
2082  if (pls->bandwidth > 0)
2083  av_dict_set_int(&pls->assoc_stream->metadata, "variant_bitrate", pls->bandwidth, 0);
2084  if (pls->id[0])
2085  av_dict_set(&pls->assoc_stream->metadata, "id", pls->id, 0);
2086  }
2087  for (i = 0; i < c->n_audios; i++) {
2088  struct representation *pls = c->audios[i];
2089 
2091  pls->assoc_stream = s->streams[pls->stream_index];
2092  if (pls->bandwidth > 0)
2093  av_dict_set_int(&pls->assoc_stream->metadata, "variant_bitrate", pls->bandwidth, 0);
2094  if (pls->id[0])
2095  av_dict_set(&pls->assoc_stream->metadata, "id", pls->id, 0);
2096  }
2097  for (i = 0; i < c->n_subtitles; i++) {
2098  struct representation *pls = c->subtitles[i];
2100  pls->assoc_stream = s->streams[pls->stream_index];
2101  if (pls->id[0])
2102  av_dict_set(&pls->assoc_stream->metadata, "id", pls->id, 0);
2103  }
2104 
2105  }
2106 
2107  return 0;
2108 fail:
2109  return ret;
2110 }
2111 
2113 {
2114  int i, j;
2115 
2116  for (i = 0; i < n; i++) {
2117  struct representation *pls = p[i];
2118 
2119  int needed = !pls->assoc_stream || pls->assoc_stream->discard < AVDISCARD_ALL;
2120  if (needed && !pls->ctx) {
2121  pls->cur_seg_offset = 0;
2122  pls->init_sec_buf_read_offset = 0;
2123  /* Catch up */
2124  for (j = 0; j < n; j++) {
2125  pls->cur_seq_no = FFMAX(pls->cur_seq_no, p[j]->cur_seq_no);
2126  }
2128  av_log(s, AV_LOG_INFO, "Now receiving stream_index %d\n", pls->stream_index);
2129  } else if (!needed && pls->ctx) {
2131  if (pls->input)
2132  ff_format_io_close(pls->parent, &pls->input);
2133  av_log(s, AV_LOG_INFO, "No longer receiving stream_index %d\n", pls->stream_index);
2134  }
2135  }
2136 }
2137 
2139 {
2140  DASHContext *c = s->priv_data;
2141  int ret = 0, i;
2142  int64_t mints = 0;
2143  struct representation *cur = NULL;
2144 
2148 
2149  for (i = 0; i < c->n_videos; i++) {
2150  struct representation *pls = c->videos[i];
2151  if (!pls->ctx)
2152  continue;
2153  if (!cur || pls->cur_timestamp < mints) {
2154  cur = pls;
2155  mints = pls->cur_timestamp;
2156  }
2157  }
2158  for (i = 0; i < c->n_audios; i++) {
2159  struct representation *pls = c->audios[i];
2160  if (!pls->ctx)
2161  continue;
2162  if (!cur || pls->cur_timestamp < mints) {
2163  cur = pls;
2164  mints = pls->cur_timestamp;
2165  }
2166  }
2167 
2168  for (i = 0; i < c->n_subtitles; i++) {
2169  struct representation *pls = c->subtitles[i];
2170  if (!pls->ctx)
2171  continue;
2172  if (!cur || pls->cur_timestamp < mints) {
2173  cur = pls;
2174  mints = pls->cur_timestamp;
2175  }
2176  }
2177 
2178  if (!cur) {
2179  return AVERROR_INVALIDDATA;
2180  }
2181  while (!ff_check_interrupt(c->interrupt_callback) && !ret) {
2182  ret = av_read_frame(cur->ctx, pkt);
2183  if (ret >= 0) {
2184  /* If we got a packet, return it */
2185  cur->cur_timestamp = av_rescale(pkt->pts, (int64_t)cur->ctx->streams[0]->time_base.num * 90000, cur->ctx->streams[0]->time_base.den);
2186  pkt->stream_index = cur->stream_index;
2187  return 0;
2188  }
2189  if (cur->is_restart_needed) {
2190  cur->cur_seg_offset = 0;
2191  cur->init_sec_buf_read_offset = 0;
2192  if (cur->input)
2193  ff_format_io_close(cur->parent, &cur->input);
2194  ret = reopen_demux_for_component(s, cur);
2195  cur->is_restart_needed = 0;
2196  }
2197  }
2198  return AVERROR_EOF;
2199 }
2200 
2202 {
2203  DASHContext *c = s->priv_data;
2204  free_audio_list(c);
2205  free_video_list(c);
2206 
2207  av_dict_free(&c->avio_opts);
2208  av_freep(&c->base_url);
2209  return 0;
2210 }
2211 
2212 static int dash_seek(AVFormatContext *s, struct representation *pls, int64_t seek_pos_msec, int flags, int dry_run)
2213 {
2214  int ret = 0;
2215  int i = 0;
2216  int j = 0;
2217  int64_t duration = 0;
2218 
2219  av_log(pls->parent, AV_LOG_VERBOSE, "DASH seek pos[%"PRId64"ms], playlist %d%s\n",
2220  seek_pos_msec, pls->rep_idx, dry_run ? " (dry)" : "");
2221 
2222  // single fragment mode
2223  if (pls->n_fragments == 1) {
2224  pls->cur_timestamp = 0;
2225  pls->cur_seg_offset = 0;
2226  if (dry_run)
2227  return 0;
2228  ff_read_frame_flush(pls->ctx);
2229  return av_seek_frame(pls->ctx, -1, seek_pos_msec * 1000, flags);
2230  }
2231 
2232  if (pls->input)
2233  ff_format_io_close(pls->parent, &pls->input);
2234 
2235  // find the nearest fragment
2236  if (pls->n_timelines > 0 && pls->fragment_timescale > 0) {
2237  int64_t num = pls->first_seq_no;
2238  av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline start n_timelines[%d] "
2239  "last_seq_no[%"PRId64"], playlist %d.\n",
2240  (int)pls->n_timelines, (int64_t)pls->last_seq_no, (int)pls->rep_idx);
2241  for (i = 0; i < pls->n_timelines; i++) {
2242  if (pls->timelines[i]->starttime > 0) {
2243  duration = pls->timelines[i]->starttime;
2244  }
2245  duration += pls->timelines[i]->duration;
2246  if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
2247  goto set_seq_num;
2248  }
2249  for (j = 0; j < pls->timelines[i]->repeat; j++) {
2250  duration += pls->timelines[i]->duration;
2251  num++;
2252  if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
2253  goto set_seq_num;
2254  }
2255  }
2256  num++;
2257  }
2258 
2259 set_seq_num:
2260  pls->cur_seq_no = num > pls->last_seq_no ? pls->last_seq_no : num;
2261  av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline end cur_seq_no[%"PRId64"], playlist %d.\n",
2262  (int64_t)pls->cur_seq_no, (int)pls->rep_idx);
2263  } else if (pls->fragment_duration > 0) {
2264  pls->cur_seq_no = pls->first_seq_no + ((seek_pos_msec * pls->fragment_timescale) / pls->fragment_duration) / 1000;
2265  } else {
2266  av_log(pls->parent, AV_LOG_ERROR, "dash_seek missing timeline or fragment_duration\n");
2267  pls->cur_seq_no = pls->first_seq_no;
2268  }
2269  pls->cur_timestamp = 0;
2270  pls->cur_seg_offset = 0;
2271  pls->init_sec_buf_read_offset = 0;
2272  ret = dry_run ? 0 : reopen_demux_for_component(s, pls);
2273 
2274  return ret;
2275 }
2276 
2277 static int dash_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
2278 {
2279  int ret = 0, i;
2280  DASHContext *c = s->priv_data;
2281  int64_t seek_pos_msec = av_rescale_rnd(timestamp, 1000,
2282  s->streams[stream_index]->time_base.den,
2283  flags & AVSEEK_FLAG_BACKWARD ?
2285  if ((flags & AVSEEK_FLAG_BYTE) || c->is_live)
2286  return AVERROR(ENOSYS);
2287 
2288  /* Seek in discarded streams with dry_run=1 to avoid reopening them */
2289  for (i = 0; i < c->n_videos; i++) {
2290  if (!ret)
2291  ret = dash_seek(s, c->videos[i], seek_pos_msec, flags, !c->videos[i]->ctx);
2292  }
2293  for (i = 0; i < c->n_audios; i++) {
2294  if (!ret)
2295  ret = dash_seek(s, c->audios[i], seek_pos_msec, flags, !c->audios[i]->ctx);
2296  }
2297  for (i = 0; i < c->n_subtitles; i++) {
2298  if (!ret)
2299  ret = dash_seek(s, c->subtitles[i], seek_pos_msec, flags, !c->subtitles[i]->ctx);
2300  }
2301 
2302  return ret;
2303 }
2304 
2305 static int dash_probe(AVProbeData *p)
2306 {
2307  if (!av_stristr(p->buf, "<MPD"))
2308  return 0;
2309 
2310  if (av_stristr(p->buf, "dash:profile:isoff-on-demand:2011") ||
2311  av_stristr(p->buf, "dash:profile:isoff-live:2011") ||
2312  av_stristr(p->buf, "dash:profile:isoff-live:2012") ||
2313  av_stristr(p->buf, "dash:profile:isoff-main:2011")) {
2314  return AVPROBE_SCORE_MAX;
2315  }
2316  if (av_stristr(p->buf, "dash:profile")) {
2317  return AVPROBE_SCORE_MAX;
2318  }
2319 
2320  return 0;
2321 }
2322 
2323 #define OFFSET(x) offsetof(DASHContext, x)
2324 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2325 static const AVOption dash_options[] = {
2326  {"allowed_extensions", "List of file extensions that dash is allowed to access",
2327  OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2328  {.str = "aac,m4a,m4s,m4v,mov,mp4,webm"},
2329  INT_MIN, INT_MAX, FLAGS},
2330  {NULL}
2331 };
2332 
2333 static const AVClass dash_class = {
2334  .class_name = "dash",
2335  .item_name = av_default_item_name,
2336  .option = dash_options,
2337  .version = LIBAVUTIL_VERSION_INT,
2338 };
2339 
2341  .name = "dash",
2342  .long_name = NULL_IF_CONFIG_SMALL("Dynamic Adaptive Streaming over HTTP"),
2343  .priv_class = &dash_class,
2344  .priv_data_size = sizeof(DASHContext),
2351 };
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:2324
#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:162
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
int n_audios
Definition: dashdec.c:141
static int64_t get_segment_start_time_based_on_timeline(struct representation *pls, int64_t cur_seq_no)
Definition: dashdec.c:262
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:1743
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:4882
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:172
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:1561
static int read_from_url(struct representation *pls, struct fragment *seg, uint8_t *buf, int buf_size)
Definition: dashdec.c:1636
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:2325
static int64_t seek_data(void *opaque, int64_t offset, int whence)
Definition: dashdec.c:1733
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:805
static AVPacket pkt
int64_t cur_timestamp
Definition: dashdec.c:118
int n_videos
Definition: dashdec.c:139
uint64_t availability_end_time
Definition: dashdec.c:150
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:609
int is_init_section_common_audio
Definition: dashdec.c:168
uint64_t min_buffer_time
Definition: dashdec.c:154
static void free_fragment(struct fragment **seg)
Definition: dashdec.c:327
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:1918
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:188
static int64_t start_time
Definition: ffplay.c:330
uint64_t suggested_presentation_delay
Definition: dashdec.c:148
uint8_t
Round toward +infinity.
Definition: mathematics.h:83
#define av_malloc(s)
uint64_t media_presentation_duration
Definition: dashdec.c:147
AVOptions.
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:202
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
char * adaptionset_maxframerate_val
Definition: dashdec.c:135
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:2201
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5670
uint64_t period_duration
Definition: dashdec.c:157
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4455
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:4554
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:151
ptrdiff_t size
Definition: opengl_enc.c:101
static void recheck_discard_flags(AVFormatContext *s, struct representation **p, int n)
Definition: dashdec.c:2112
uint64_t availability_start_time
Definition: dashdec.c:149
static enum AVMediaType get_content_type(xmlNodePtr node)
Definition: dashdec.c:565
#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:142
#define INITIAL_BUFFER_SIZE
Definition: dashdec.c:31
char * adaptionset_bitstreamswitching_val
Definition: dashdec.c:137
static xmlNodePtr find_child_node_by_name(xmlNodePtr rootnode, const char *nodename)
Definition: dashdec.c:548
static int aligned(int val)
Definition: dashdec.c:178
struct representation ** subtitles
Definition: dashdec.c:144
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:2015
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
char * adaptionset_minbw_val
Definition: dashdec.c:128
uint32_t init_sec_data_len
Definition: dashdec.c:116
static void free_timelines_list(struct representation *pls)
Definition: dashdec.c:347
int64_t starttime
Definition: dashdec.c:57
static void move_segments(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
Definition: dashdec.c:1442
static int64_t calc_max_seg_no(struct representation *pls, DASHContext *c)
Definition: dashdec.c:1402
#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:1350
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:1959
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:2277
char * av_strireplace(const char *str, const char *from, const char *to)
Locale-independent strings replace.
Definition: avstring.c:234
char * adaptionset_par_val
Definition: dashdec.c:126
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:118
char * adaptionset_segmentalignment_val
Definition: dashdec.c:136
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:152
struct fragment ** fragments
Definition: dashdec.c:93
static void free_representation(struct representation *pls)
Definition: dashdec.c:358
AVIOInterruptCB * interrupt_callback
Definition: dashdec.c:161
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
static void free_audio_list(DASHContext *c)
Definition: dashdec.c:388
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:336
#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:1428
int n_subtitles
Definition: dashdec.c:143
static void copy_init_section(struct representation *rep_dest, struct representation *rep_src)
Definition: dashdec.c:1981
static uint32_t get_duration_insec(AVFormatContext *s, const char *duration)
Definition: dashdec.c:218
#define s(width, name)
Definition: cbs_vp9.c:257
int is_live
Definition: dashdec.c:160
enum AVMediaType type
Definition: dashdec.c:86
#define OFFSET(x)
Definition: dashdec.c:2323
static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url, AVDictionary *opts, AVDictionary *opts2, int *is_http)
Definition: dashdec.c:410
static int parse_manifest(AVFormatContext *s, const char *url, AVIOContext *in)
Definition: dashdec.c:1164
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:1806
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:158
char * adaptionset_contenttype_val
Definition: dashdec.c:125
char * adaptionset_maxwidth_val
Definition: dashdec.c:131
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:532
static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **opts)
Definition: dashdec.c:1831
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:2305
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:164
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:1991
void * buf
Definition: avisynth_c.h:690
GLint GLenum type
Definition: opengl_enc.c:105
uint64_t time_shift_buffer_depth
Definition: dashdec.c:153
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:1652
static int dash_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: dashdec.c:2138
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:712
#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:591
static int parse_manifest_segmenttimeline(AVFormatContext *s, struct representation *rep, xmlNodePtr fragment_timeline_node)
Definition: dashdec.c:676
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:163
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4389
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:1768
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
#define flags(name, subs,...)
Definition: cbs_av1.c:606
AVInputFormat ff_dash_demuxer
Definition: dashdec.c:2340
static int dash_seek(AVFormatContext *s, struct representation *pls, int64_t seek_pos_msec, int flags, int dry_run)
Definition: dashdec.c:2212
int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Seek to the keyframe at timestamp.
Definition: utils.c:2506
char * adaptionset_lang_val
Definition: dashdec.c:127
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:1686
#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
char * adaptionset_maxbw_val
Definition: dashdec.c:129
char * adaptionset_minheight_val
Definition: dashdec.c:132
int
char * adaptionset_minframerate_val
Definition: dashdec.c:134
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:3564
static const AVClass dash_class
Definition: dashdec.c:2333
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
static void free_subtitle_list(DASHContext *c)
Definition: dashdec.c:399
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:4427
int64_t fragment_timescale
Definition: dashdec.c:103
static void close_demux_for_component(struct representation *pls)
Definition: dashdec.c:1841
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:761
#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:1102
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:476
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:183
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:822
char * adaptionset_minwidth_val
Definition: dashdec.c:130
static int64_t calc_min_seg_no(AVFormatContext *s, struct representation *pls)
Definition: dashdec.c:1388
int64_t cur_seg_offset
Definition: dashdec.c:108
struct representation ** videos
Definition: dashdec.c:140
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:377
#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:167
int stream_index
Definition: avcodec.h:1468
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:903
char * adaptionset_maxheight_val
Definition: dashdec.c:133
static int reopen_demux_for_component(AVFormatContext *s, struct representation *pls)
Definition: dashdec.c:1851
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:1443
static int64_t calc_next_seg_no_from_timelines(struct representation *pls, int64_t cur_time)
Definition: dashdec.c:297
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:1459
static int open_demux_for_component(AVFormatContext *s, struct representation *pls)
Definition: dashdec.c:1926
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:1460
static uint8_t tmp[11]
Definition: aes_ctr.c:26