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 #define MAX_BPRINT_READ_SIZE (UINT_MAX - 1)
33 #define DEFAULT_MANIFEST_SIZE 8 * 1024
34
35 struct fragment {
36 int64_t url_offset;
37 int64_t size;
38 char *url;
39 };
40
41 /*
42 * reference to : ISO_IEC_23009-1-DASH-2012
43 * Section: 5.3.9.6.2
44 * Table: Table 17 — Semantics of SegmentTimeline element
45 * */
46 struct timeline {
47 /* starttime: Element or Attribute Name
48 * specifies the MPD start time, in @timescale units,
49 * the first Segment in the series starts relative to the beginning of the Period.
50 * The value of this attribute must be equal to or greater than the sum of the previous S
51 * element earliest presentation time and the sum of the contiguous Segment durations.
52 * If the value of the attribute is greater than what is expressed by the previous S element,
53 * it expresses discontinuities in the timeline.
54 * If not present then the value shall be assumed to be zero for the first S element
55 * and for the subsequent S elements, the value shall be assumed to be the sum of
56 * the previous S element's earliest presentation time and contiguous duration
57 * (i.e. previous S@starttime + @duration * (@repeat + 1)).
58 * */
59 int64_t starttime;
60 /* repeat: Element or Attribute Name
61 * specifies the repeat count of the number of following contiguous Segments with
62 * the same duration expressed by the value of @duration. This value is zero-based
63 * (e.g. a value of three means four Segments in the contiguous series).
64 * */
65 int64_t repeat;
66 /* duration: Element or Attribute Name
67 * specifies the Segment duration, in units of the value of the @timescale.
68 * */
69 int64_t duration;
70 };
71
72 /*
73 * Each playlist has its own demuxer. If it is currently active,
74 * it has an opened AVIOContext too, and potentially an AVPacket
75 * containing the next packet from this stream.
76 */
77 struct representation {
78 char *url_template;
79 AVIOContext pb;
80 AVIOContext *input;
81 AVFormatContext *parent;
82 AVFormatContext *ctx;
83 int stream_index;
84
85 char *id;
86 char *lang;
87 int bandwidth;
88 AVRational framerate;
89 AVStream *assoc_stream; /* demuxer stream associated with this representation */
90
91 int n_fragments;
92 struct fragment **fragments; /* VOD list of fragment for profile */
93
94 int n_timelines;
95 struct timeline **timelines;
96
97 int64_t first_seq_no;
98 int64_t last_seq_no;
99 int64_t start_number; /* used in case when we have dynamic list of segment to know which segments are new one*/
100
101 int64_t fragment_duration;
102 int64_t fragment_timescale;
103
104 int64_t presentation_timeoffset;
105
106 int64_t cur_seq_no;
107 int64_t cur_seg_offset;
108 int64_t cur_seg_size;
109 struct fragment *cur_seg;
110
111 /* Currently active Media Initialization Section */
112 struct fragment *init_section;
113 uint8_t *init_sec_buf;
114 uint32_t init_sec_buf_size;
115 uint32_t init_sec_data_len;
116 uint32_t init_sec_buf_read_offset;
117 int64_t cur_timestamp;
118 int is_restart_needed;
119 };
120
121 typedef struct DASHContext {
122 const AVClass *class;
123 char *base_url;
124
125 int n_videos;
126 struct representation **videos;
127 int n_audios;
128 struct representation **audios;
129 int n_subtitles;
130 struct representation **subtitles;
131
132 /* MediaPresentationDescription Attribute */
133 uint64_t media_presentation_duration;
134 uint64_t suggested_presentation_delay;
135 uint64_t availability_start_time;
136 uint64_t availability_end_time;
137 uint64_t publish_time;
138 uint64_t minimum_update_period;
139 uint64_t time_shift_buffer_depth;
140 uint64_t min_buffer_time;
141
142 /* Period Attribute */
143 uint64_t period_duration;
144 uint64_t period_start;
145
146 /* AdaptationSet Attribute */
147 char *adaptionset_lang;
148
149 int is_live;
150 AVIOInterruptCB *interrupt_callback;
151 char *allowed_extensions;
152 AVDictionary *avio_opts;
153 int max_url_size;
154
155 /* Flags for init section*/
156 int is_init_section_common_video;
157 int is_init_section_common_audio;
158 int is_init_section_common_subtitle;
159
160 } DASHContext;
161
ishttp(char * url)162 static int ishttp(char *url)
163 {
164 const char *proto_name = avio_find_protocol_name(url);
165 return proto_name && av_strstart(proto_name, "http", NULL);
166 }
167
aligned(int val)168 static int aligned(int val)
169 {
170 return ((val + 0x3F) >> 6) << 6;
171 }
172
get_current_time_in_sec(void)173 static uint64_t get_current_time_in_sec(void)
174 {
175 return av_gettime() / 1000000;
176 }
177
get_utc_date_time_insec(AVFormatContext * s,const char * datetime)178 static uint64_t get_utc_date_time_insec(AVFormatContext *s, const char *datetime)
179 {
180 struct tm timeinfo;
181 int year = 0;
182 int month = 0;
183 int day = 0;
184 int hour = 0;
185 int minute = 0;
186 int ret = 0;
187 float second = 0.0;
188
189 /* ISO-8601 date parser */
190 if (!datetime)
191 return 0;
192
193 ret = sscanf(datetime, "%d-%d-%dT%d:%d:%fZ", &year, &month, &day, &hour, &minute, &second);
194 /* year, month, day, hour, minute, second 6 arguments */
195 if (ret != 6) {
196 av_log(s, AV_LOG_WARNING, "get_utc_date_time_insec get a wrong time format\n");
197 }
198 timeinfo.tm_year = year - 1900;
199 timeinfo.tm_mon = month - 1;
200 timeinfo.tm_mday = day;
201 timeinfo.tm_hour = hour;
202 timeinfo.tm_min = minute;
203 timeinfo.tm_sec = (int)second;
204
205 return av_timegm(&timeinfo);
206 }
207
get_duration_insec(AVFormatContext * s,const char * duration)208 static uint32_t get_duration_insec(AVFormatContext *s, const char *duration)
209 {
210 /* ISO-8601 duration parser */
211 uint32_t days = 0;
212 uint32_t hours = 0;
213 uint32_t mins = 0;
214 uint32_t secs = 0;
215 int size = 0;
216 float value = 0;
217 char type = '\0';
218 const char *ptr = duration;
219
220 while (*ptr) {
221 if (*ptr == 'P' || *ptr == 'T') {
222 ptr++;
223 continue;
224 }
225
226 if (sscanf(ptr, "%f%c%n", &value, &type, &size) != 2) {
227 av_log(s, AV_LOG_WARNING, "get_duration_insec get a wrong time format\n");
228 return 0; /* parser error */
229 }
230 switch (type) {
231 case 'D':
232 days = (uint32_t)value;
233 break;
234 case 'H':
235 hours = (uint32_t)value;
236 break;
237 case 'M':
238 mins = (uint32_t)value;
239 break;
240 case 'S':
241 secs = (uint32_t)value;
242 break;
243 default:
244 // handle invalid type
245 break;
246 }
247 ptr += size;
248 }
249 return ((days * 24 + hours) * 60 + mins) * 60 + secs;
250 }
251
get_segment_start_time_based_on_timeline(struct representation * pls,int64_t cur_seq_no)252 static int64_t get_segment_start_time_based_on_timeline(struct representation *pls, int64_t cur_seq_no)
253 {
254 int64_t start_time = 0;
255 int64_t i = 0;
256 int64_t j = 0;
257 int64_t num = 0;
258
259 if (pls->n_timelines) {
260 for (i = 0; i < pls->n_timelines; i++) {
261 if (pls->timelines[i]->starttime > 0) {
262 start_time = pls->timelines[i]->starttime;
263 }
264 if (num == cur_seq_no)
265 goto finish;
266
267 start_time += pls->timelines[i]->duration;
268
269 if (pls->timelines[i]->repeat == -1) {
270 start_time = pls->timelines[i]->duration * cur_seq_no;
271 goto finish;
272 }
273
274 for (j = 0; j < pls->timelines[i]->repeat; j++) {
275 num++;
276 if (num == cur_seq_no)
277 goto finish;
278 start_time += pls->timelines[i]->duration;
279 }
280 num++;
281 }
282 }
283 finish:
284 return start_time;
285 }
286
calc_next_seg_no_from_timelines(struct representation * pls,int64_t cur_time)287 static int64_t calc_next_seg_no_from_timelines(struct representation *pls, int64_t cur_time)
288 {
289 int64_t i = 0;
290 int64_t j = 0;
291 int64_t num = 0;
292 int64_t start_time = 0;
293
294 for (i = 0; i < pls->n_timelines; i++) {
295 if (pls->timelines[i]->starttime > 0) {
296 start_time = pls->timelines[i]->starttime;
297 }
298 if (start_time > cur_time)
299 goto finish;
300
301 start_time += pls->timelines[i]->duration;
302 for (j = 0; j < pls->timelines[i]->repeat; j++) {
303 num++;
304 if (start_time > cur_time)
305 goto finish;
306 start_time += pls->timelines[i]->duration;
307 }
308 num++;
309 }
310
311 return -1;
312
313 finish:
314 return num;
315 }
316
free_fragment(struct fragment ** seg)317 static void free_fragment(struct fragment **seg)
318 {
319 if (!(*seg)) {
320 return;
321 }
322 av_freep(&(*seg)->url);
323 av_freep(seg);
324 }
325
free_fragment_list(struct representation * pls)326 static void free_fragment_list(struct representation *pls)
327 {
328 int i;
329
330 for (i = 0; i < pls->n_fragments; i++) {
331 free_fragment(&pls->fragments[i]);
332 }
333 av_freep(&pls->fragments);
334 pls->n_fragments = 0;
335 }
336
free_timelines_list(struct representation * pls)337 static void free_timelines_list(struct representation *pls)
338 {
339 int i;
340
341 for (i = 0; i < pls->n_timelines; i++) {
342 av_freep(&pls->timelines[i]);
343 }
344 av_freep(&pls->timelines);
345 pls->n_timelines = 0;
346 }
347
free_representation(struct representation * pls)348 static void free_representation(struct representation *pls)
349 {
350 free_fragment_list(pls);
351 free_timelines_list(pls);
352 free_fragment(&pls->cur_seg);
353 free_fragment(&pls->init_section);
354 av_freep(&pls->init_sec_buf);
355 av_freep(&pls->pb.buffer);
356 ff_format_io_close(pls->parent, &pls->input);
357 if (pls->ctx) {
358 pls->ctx->pb = NULL;
359 avformat_close_input(&pls->ctx);
360 }
361
362 av_freep(&pls->url_template);
363 av_freep(&pls->lang);
364 av_freep(&pls->id);
365 av_freep(&pls);
366 }
367
free_video_list(DASHContext * c)368 static void free_video_list(DASHContext *c)
369 {
370 int i;
371 for (i = 0; i < c->n_videos; i++) {
372 struct representation *pls = c->videos[i];
373 free_representation(pls);
374 }
375 av_freep(&c->videos);
376 c->n_videos = 0;
377 }
378
free_audio_list(DASHContext * c)379 static void free_audio_list(DASHContext *c)
380 {
381 int i;
382 for (i = 0; i < c->n_audios; i++) {
383 struct representation *pls = c->audios[i];
384 free_representation(pls);
385 }
386 av_freep(&c->audios);
387 c->n_audios = 0;
388 }
389
free_subtitle_list(DASHContext * c)390 static void free_subtitle_list(DASHContext *c)
391 {
392 int i;
393 for (i = 0; i < c->n_subtitles; i++) {
394 struct representation *pls = c->subtitles[i];
395 free_representation(pls);
396 }
397 av_freep(&c->subtitles);
398 c->n_subtitles = 0;
399 }
400
open_url(AVFormatContext * s,AVIOContext ** pb,const char * url,AVDictionary ** opts,AVDictionary * opts2,int * is_http)401 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
402 AVDictionary **opts, AVDictionary *opts2, int *is_http)
403 {
404 DASHContext *c = s->priv_data;
405 AVDictionary *tmp = NULL;
406 const char *proto_name = NULL;
407 int ret;
408
409 if (av_strstart(url, "crypto", NULL)) {
410 if (url[6] == '+' || url[6] == ':')
411 proto_name = avio_find_protocol_name(url + 7);
412 }
413
414 if (!proto_name)
415 proto_name = avio_find_protocol_name(url);
416
417 if (!proto_name)
418 return AVERROR_INVALIDDATA;
419
420 // only http(s) & file are allowed
421 if (av_strstart(proto_name, "file", NULL)) {
422 if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
423 av_log(s, AV_LOG_ERROR,
424 "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
425 "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
426 url);
427 return AVERROR_INVALIDDATA;
428 }
429 } else if (av_strstart(proto_name, "http", NULL)) {
430 ;
431 } else
432 return AVERROR_INVALIDDATA;
433
434 if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
435 ;
436 else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
437 ;
438 else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
439 return AVERROR_INVALIDDATA;
440
441 av_freep(pb);
442 av_dict_copy(&tmp, *opts, 0);
443 av_dict_copy(&tmp, opts2, 0);
444 ret = avio_open2(pb, url, AVIO_FLAG_READ, c->interrupt_callback, &tmp);
445 if (ret >= 0) {
446 // update cookies on http response with setcookies.
447 char *new_cookies = NULL;
448
449 if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
450 av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
451
452 if (new_cookies) {
453 av_dict_set(opts, "cookies", new_cookies, AV_DICT_DONT_STRDUP_VAL);
454 }
455
456 }
457
458 av_dict_free(&tmp);
459
460 if (is_http)
461 *is_http = av_strstart(proto_name, "http", NULL);
462
463 return ret;
464 }
465
get_content_url(xmlNodePtr * baseurl_nodes,int n_baseurl_nodes,int max_url_size,char * rep_id_val,char * rep_bandwidth_val,char * val)466 static char *get_content_url(xmlNodePtr *baseurl_nodes,
467 int n_baseurl_nodes,
468 int max_url_size,
469 char *rep_id_val,
470 char *rep_bandwidth_val,
471 char *val)
472 {
473 int i;
474 char *text;
475 char *url = NULL;
476 char *tmp_str = av_mallocz(max_url_size);
477
478 if (!tmp_str)
479 return NULL;
480
481 for (i = 0; i < n_baseurl_nodes; ++i) {
482 if (baseurl_nodes[i] &&
483 baseurl_nodes[i]->children &&
484 baseurl_nodes[i]->children->type == XML_TEXT_NODE) {
485 text = xmlNodeGetContent(baseurl_nodes[i]->children);
486 if (text) {
487 memset(tmp_str, 0, max_url_size);
488 ff_make_absolute_url(tmp_str, max_url_size, "", text);
489 xmlFree(text);
490 }
491 }
492 }
493
494 if (val)
495 ff_make_absolute_url(tmp_str, max_url_size, tmp_str, val);
496
497 if (rep_id_val) {
498 url = av_strireplace(tmp_str, "$RepresentationID$", rep_id_val);
499 if (!url) {
500 goto end;
501 }
502 av_strlcpy(tmp_str, url, max_url_size);
503 }
504 if (rep_bandwidth_val && tmp_str[0] != '\0') {
505 // free any previously assigned url before reassigning
506 av_free(url);
507 url = av_strireplace(tmp_str, "$Bandwidth$", rep_bandwidth_val);
508 if (!url) {
509 goto end;
510 }
511 }
512 end:
513 av_free(tmp_str);
514 return url;
515 }
516
get_val_from_nodes_tab(xmlNodePtr * nodes,const int n_nodes,const char * attrname)517 static char *get_val_from_nodes_tab(xmlNodePtr *nodes, const int n_nodes, const char *attrname)
518 {
519 int i;
520 char *val;
521
522 for (i = 0; i < n_nodes; ++i) {
523 if (nodes[i]) {
524 val = xmlGetProp(nodes[i], attrname);
525 if (val)
526 return val;
527 }
528 }
529
530 return NULL;
531 }
532
find_child_node_by_name(xmlNodePtr rootnode,const char * nodename)533 static xmlNodePtr find_child_node_by_name(xmlNodePtr rootnode, const char *nodename)
534 {
535 xmlNodePtr node = rootnode;
536 if (!node) {
537 return NULL;
538 }
539
540 node = xmlFirstElementChild(node);
541 while (node) {
542 if (!av_strcasecmp(node->name, nodename)) {
543 return node;
544 }
545 node = xmlNextElementSibling(node);
546 }
547 return NULL;
548 }
549
get_content_type(xmlNodePtr node)550 static enum AVMediaType get_content_type(xmlNodePtr node)
551 {
552 enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
553 int i = 0;
554 const char *attr;
555 char *val = NULL;
556
557 if (node) {
558 for (i = 0; i < 2; i++) {
559 attr = i ? "mimeType" : "contentType";
560 val = xmlGetProp(node, attr);
561 if (val) {
562 if (av_stristr(val, "video")) {
563 type = AVMEDIA_TYPE_VIDEO;
564 } else if (av_stristr(val, "audio")) {
565 type = AVMEDIA_TYPE_AUDIO;
566 } else if (av_stristr(val, "text")) {
567 type = AVMEDIA_TYPE_SUBTITLE;
568 }
569 xmlFree(val);
570 }
571 }
572 }
573 return type;
574 }
575
get_Fragment(char * range)576 static struct fragment * get_Fragment(char *range)
577 {
578 struct fragment * seg = av_mallocz(sizeof(struct fragment));
579
580 if (!seg)
581 return NULL;
582
583 seg->size = -1;
584 if (range) {
585 char *str_end_offset;
586 char *str_offset = av_strtok(range, "-", &str_end_offset);
587 seg->url_offset = strtoll(str_offset, NULL, 10);
588 seg->size = strtoll(str_end_offset, NULL, 10) - seg->url_offset + 1;
589 }
590
591 return seg;
592 }
593
parse_manifest_segmenturlnode(AVFormatContext * s,struct representation * rep,xmlNodePtr fragmenturl_node,xmlNodePtr * baseurl_nodes,char * rep_id_val,char * rep_bandwidth_val)594 static int parse_manifest_segmenturlnode(AVFormatContext *s, struct representation *rep,
595 xmlNodePtr fragmenturl_node,
596 xmlNodePtr *baseurl_nodes,
597 char *rep_id_val,
598 char *rep_bandwidth_val)
599 {
600 DASHContext *c = s->priv_data;
601 char *initialization_val = NULL;
602 char *media_val = NULL;
603 char *range_val = NULL;
604 int max_url_size = c ? c->max_url_size: MAX_URL_SIZE;
605 int err;
606
607 if (!av_strcasecmp(fragmenturl_node->name, "Initialization")) {
608 initialization_val = xmlGetProp(fragmenturl_node, "sourceURL");
609 range_val = xmlGetProp(fragmenturl_node, "range");
610 if (initialization_val || range_val) {
611 free_fragment(&rep->init_section);
612 rep->init_section = get_Fragment(range_val);
613 xmlFree(range_val);
614 if (!rep->init_section) {
615 xmlFree(initialization_val);
616 return AVERROR(ENOMEM);
617 }
618 rep->init_section->url = get_content_url(baseurl_nodes, 4,
619 max_url_size,
620 rep_id_val,
621 rep_bandwidth_val,
622 initialization_val);
623 xmlFree(initialization_val);
624 if (!rep->init_section->url) {
625 av_freep(&rep->init_section);
626 return AVERROR(ENOMEM);
627 }
628 }
629 } else if (!av_strcasecmp(fragmenturl_node->name, "SegmentURL")) {
630 media_val = xmlGetProp(fragmenturl_node, "media");
631 range_val = xmlGetProp(fragmenturl_node, "mediaRange");
632 if (media_val || range_val) {
633 struct fragment *seg = get_Fragment(range_val);
634 xmlFree(range_val);
635 if (!seg) {
636 xmlFree(media_val);
637 return AVERROR(ENOMEM);
638 }
639 seg->url = get_content_url(baseurl_nodes, 4,
640 max_url_size,
641 rep_id_val,
642 rep_bandwidth_val,
643 media_val);
644 xmlFree(media_val);
645 if (!seg->url) {
646 av_free(seg);
647 return AVERROR(ENOMEM);
648 }
649 err = av_dynarray_add_nofree(&rep->fragments, &rep->n_fragments, seg);
650 if (err < 0) {
651 free_fragment(&seg);
652 return err;
653 }
654 }
655 }
656
657 return 0;
658 }
659
parse_manifest_segmenttimeline(AVFormatContext * s,struct representation * rep,xmlNodePtr fragment_timeline_node)660 static int parse_manifest_segmenttimeline(AVFormatContext *s, struct representation *rep,
661 xmlNodePtr fragment_timeline_node)
662 {
663 xmlAttrPtr attr = NULL;
664 char *val = NULL;
665 int err;
666
667 if (!av_strcasecmp(fragment_timeline_node->name, "S")) {
668 struct timeline *tml = av_mallocz(sizeof(struct timeline));
669 if (!tml) {
670 return AVERROR(ENOMEM);
671 }
672 attr = fragment_timeline_node->properties;
673 while (attr) {
674 val = xmlGetProp(fragment_timeline_node, attr->name);
675
676 if (!val) {
677 av_log(s, AV_LOG_WARNING, "parse_manifest_segmenttimeline attr->name = %s val is NULL\n", attr->name);
678 continue;
679 }
680
681 if (!av_strcasecmp(attr->name, "t")) {
682 tml->starttime = (int64_t)strtoll(val, NULL, 10);
683 } else if (!av_strcasecmp(attr->name, "r")) {
684 tml->repeat =(int64_t) strtoll(val, NULL, 10);
685 } else if (!av_strcasecmp(attr->name, "d")) {
686 tml->duration = (int64_t)strtoll(val, NULL, 10);
687 }
688 attr = attr->next;
689 xmlFree(val);
690 }
691 err = av_dynarray_add_nofree(&rep->timelines, &rep->n_timelines, tml);
692 if (err < 0) {
693 av_free(tml);
694 return err;
695 }
696 }
697
698 return 0;
699 }
700
resolve_content_path(AVFormatContext * s,const char * url,int * max_url_size,xmlNodePtr * baseurl_nodes,int n_baseurl_nodes)701 static int resolve_content_path(AVFormatContext *s, const char *url, int *max_url_size, xmlNodePtr *baseurl_nodes, int n_baseurl_nodes)
702 {
703 char *tmp_str = NULL;
704 char *path = NULL;
705 char *mpdName = NULL;
706 xmlNodePtr node = NULL;
707 char *baseurl = NULL;
708 char *root_url = NULL;
709 char *text = NULL;
710 char *tmp = NULL;
711 int isRootHttp = 0;
712 char token ='/';
713 int start = 0;
714 int rootId = 0;
715 int updated = 0;
716 int size = 0;
717 int i;
718 int tmp_max_url_size = strlen(url);
719
720 for (i = n_baseurl_nodes-1; i >= 0 ; i--) {
721 text = xmlNodeGetContent(baseurl_nodes[i]);
722 if (!text)
723 continue;
724 tmp_max_url_size += strlen(text);
725 if (ishttp(text)) {
726 xmlFree(text);
727 break;
728 }
729 xmlFree(text);
730 }
731
732 tmp_max_url_size = aligned(tmp_max_url_size);
733 text = av_mallocz(tmp_max_url_size);
734 if (!text) {
735 updated = AVERROR(ENOMEM);
736 goto end;
737 }
738 av_strlcpy(text, url, strlen(url)+1);
739 tmp = text;
740 while (mpdName = av_strtok(tmp, "/", &tmp)) {
741 size = strlen(mpdName);
742 }
743 av_free(text);
744
745 path = av_mallocz(tmp_max_url_size);
746 tmp_str = av_mallocz(tmp_max_url_size);
747 if (!tmp_str || !path) {
748 updated = AVERROR(ENOMEM);
749 goto end;
750 }
751
752 av_strlcpy (path, url, strlen(url) - size + 1);
753 for (rootId = n_baseurl_nodes - 1; rootId > 0; rootId --) {
754 if (!(node = baseurl_nodes[rootId])) {
755 continue;
756 }
757 text = xmlNodeGetContent(node);
758 if (ishttp(text)) {
759 xmlFree(text);
760 break;
761 }
762 xmlFree(text);
763 }
764
765 node = baseurl_nodes[rootId];
766 baseurl = xmlNodeGetContent(node);
767 root_url = (av_strcasecmp(baseurl, "")) ? baseurl : path;
768 if (node) {
769 xmlNodeSetContent(node, root_url);
770 updated = 1;
771 }
772
773 size = strlen(root_url);
774 isRootHttp = ishttp(root_url);
775
776 if (size > 0 && root_url[size - 1] != token) {
777 av_strlcat(root_url, "/", size + 2);
778 size += 2;
779 }
780
781 for (i = 0; i < n_baseurl_nodes; ++i) {
782 if (i == rootId) {
783 continue;
784 }
785 text = xmlNodeGetContent(baseurl_nodes[i]);
786 if (text && !av_strstart(text, "/", NULL)) {
787 memset(tmp_str, 0, strlen(tmp_str));
788 if (!ishttp(text) && isRootHttp) {
789 av_strlcpy(tmp_str, root_url, size + 1);
790 }
791 start = (text[0] == token);
792 if (start && av_stristr(tmp_str, text)) {
793 char *p = tmp_str;
794 if (!av_strncasecmp(tmp_str, "http://", 7)) {
795 p += 7;
796 } else if (!av_strncasecmp(tmp_str, "https://", 8)) {
797 p += 8;
798 }
799 p = strchr(p, '/');
800 memset(p + 1, 0, strlen(p));
801 }
802 av_strlcat(tmp_str, text + start, tmp_max_url_size);
803 xmlNodeSetContent(baseurl_nodes[i], tmp_str);
804 updated = 1;
805 xmlFree(text);
806 }
807 }
808
809 end:
810 if (tmp_max_url_size > *max_url_size) {
811 *max_url_size = tmp_max_url_size;
812 }
813 av_free(path);
814 av_free(tmp_str);
815 xmlFree(baseurl);
816 return updated;
817
818 }
819
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)820 static int parse_manifest_representation(AVFormatContext *s, const char *url,
821 xmlNodePtr node,
822 xmlNodePtr adaptionset_node,
823 xmlNodePtr mpd_baseurl_node,
824 xmlNodePtr period_baseurl_node,
825 xmlNodePtr period_segmenttemplate_node,
826 xmlNodePtr period_segmentlist_node,
827 xmlNodePtr fragment_template_node,
828 xmlNodePtr content_component_node,
829 xmlNodePtr adaptionset_baseurl_node,
830 xmlNodePtr adaptionset_segmentlist_node,
831 xmlNodePtr adaptionset_supplementalproperty_node)
832 {
833 int32_t ret = 0;
834 DASHContext *c = s->priv_data;
835 struct representation *rep = NULL;
836 struct fragment *seg = NULL;
837 xmlNodePtr representation_segmenttemplate_node = NULL;
838 xmlNodePtr representation_baseurl_node = NULL;
839 xmlNodePtr representation_segmentlist_node = NULL;
840 xmlNodePtr segmentlists_tab[3];
841 xmlNodePtr fragment_timeline_node = NULL;
842 xmlNodePtr fragment_templates_tab[5];
843 char *val = NULL;
844 xmlNodePtr baseurl_nodes[4];
845 xmlNodePtr representation_node = node;
846 char *rep_bandwidth_val;
847 enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
848
849 // try get information from representation
850 if (type == AVMEDIA_TYPE_UNKNOWN)
851 type = get_content_type(representation_node);
852 // try get information from contentComponen
853 if (type == AVMEDIA_TYPE_UNKNOWN)
854 type = get_content_type(content_component_node);
855 // try get information from adaption set
856 if (type == AVMEDIA_TYPE_UNKNOWN)
857 type = get_content_type(adaptionset_node);
858 if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO &&
859 type != AVMEDIA_TYPE_SUBTITLE) {
860 av_log(s, AV_LOG_VERBOSE, "Parsing '%s' - skipp not supported representation type\n", url);
861 return 0;
862 }
863
864 // convert selected representation to our internal struct
865 rep = av_mallocz(sizeof(struct representation));
866 if (!rep)
867 return AVERROR(ENOMEM);
868 if (c->adaptionset_lang) {
869 rep->lang = av_strdup(c->adaptionset_lang);
870 if (!rep->lang) {
871 av_log(s, AV_LOG_ERROR, "alloc language memory failure\n");
872 av_freep(&rep);
873 return AVERROR(ENOMEM);
874 }
875 }
876 rep->parent = s;
877 representation_segmenttemplate_node = find_child_node_by_name(representation_node, "SegmentTemplate");
878 representation_baseurl_node = find_child_node_by_name(representation_node, "BaseURL");
879 representation_segmentlist_node = find_child_node_by_name(representation_node, "SegmentList");
880 rep_bandwidth_val = xmlGetProp(representation_node, "bandwidth");
881 val = xmlGetProp(representation_node, "id");
882 if (val) {
883 rep->id = av_strdup(val);
884 xmlFree(val);
885 if (!rep->id)
886 goto enomem;
887 }
888
889 baseurl_nodes[0] = mpd_baseurl_node;
890 baseurl_nodes[1] = period_baseurl_node;
891 baseurl_nodes[2] = adaptionset_baseurl_node;
892 baseurl_nodes[3] = representation_baseurl_node;
893
894 ret = resolve_content_path(s, url, &c->max_url_size, baseurl_nodes, 4);
895 c->max_url_size = aligned(c->max_url_size
896 + (rep->id ? strlen(rep->id) : 0)
897 + (rep_bandwidth_val ? strlen(rep_bandwidth_val) : 0));
898 if (ret == AVERROR(ENOMEM) || ret == 0)
899 goto free;
900 if (representation_segmenttemplate_node || fragment_template_node || period_segmenttemplate_node) {
901 fragment_timeline_node = NULL;
902 fragment_templates_tab[0] = representation_segmenttemplate_node;
903 fragment_templates_tab[1] = adaptionset_segmentlist_node;
904 fragment_templates_tab[2] = fragment_template_node;
905 fragment_templates_tab[3] = period_segmenttemplate_node;
906 fragment_templates_tab[4] = period_segmentlist_node;
907
908 val = get_val_from_nodes_tab(fragment_templates_tab, 4, "initialization");
909 if (val) {
910 rep->init_section = av_mallocz(sizeof(struct fragment));
911 if (!rep->init_section) {
912 xmlFree(val);
913 goto enomem;
914 }
915 c->max_url_size = aligned(c->max_url_size + strlen(val));
916 rep->init_section->url = get_content_url(baseurl_nodes, 4,
917 c->max_url_size, rep->id,
918 rep_bandwidth_val, val);
919 xmlFree(val);
920 if (!rep->init_section->url)
921 goto enomem;
922 rep->init_section->size = -1;
923 }
924 val = get_val_from_nodes_tab(fragment_templates_tab, 4, "media");
925 if (val) {
926 c->max_url_size = aligned(c->max_url_size + strlen(val));
927 rep->url_template = get_content_url(baseurl_nodes, 4,
928 c->max_url_size, rep->id,
929 rep_bandwidth_val, val);
930 xmlFree(val);
931 }
932 val = get_val_from_nodes_tab(fragment_templates_tab, 4, "presentationTimeOffset");
933 if (val) {
934 rep->presentation_timeoffset = (int64_t) strtoll(val, NULL, 10);
935 av_log(s, AV_LOG_TRACE, "rep->presentation_timeoffset = [%"PRId64"]\n", rep->presentation_timeoffset);
936 xmlFree(val);
937 }
938 val = get_val_from_nodes_tab(fragment_templates_tab, 4, "duration");
939 if (val) {
940 rep->fragment_duration = (int64_t) strtoll(val, NULL, 10);
941 av_log(s, AV_LOG_TRACE, "rep->fragment_duration = [%"PRId64"]\n", rep->fragment_duration);
942 xmlFree(val);
943 }
944 val = get_val_from_nodes_tab(fragment_templates_tab, 4, "timescale");
945 if (val) {
946 rep->fragment_timescale = (int64_t) strtoll(val, NULL, 10);
947 av_log(s, AV_LOG_TRACE, "rep->fragment_timescale = [%"PRId64"]\n", rep->fragment_timescale);
948 xmlFree(val);
949 }
950 val = get_val_from_nodes_tab(fragment_templates_tab, 4, "startNumber");
951 if (val) {
952 rep->start_number = rep->first_seq_no = (int64_t) strtoll(val, NULL, 10);
953 av_log(s, AV_LOG_TRACE, "rep->first_seq_no = [%"PRId64"]\n", rep->first_seq_no);
954 xmlFree(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 goto free;
982 fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
983 }
984 }
985 } else if (representation_baseurl_node && !representation_segmentlist_node) {
986 seg = av_mallocz(sizeof(struct fragment));
987 if (!seg)
988 goto enomem;
989 ret = av_dynarray_add_nofree(&rep->fragments, &rep->n_fragments, seg);
990 if (ret < 0) {
991 av_free(seg);
992 goto free;
993 }
994 seg->url = get_content_url(baseurl_nodes, 4, c->max_url_size,
995 rep->id, rep_bandwidth_val, NULL);
996 if (!seg->url)
997 goto enomem;
998 seg->size = -1;
999 } else if (representation_segmentlist_node) {
1000 // TODO: https://www.brendanlong.com/the-structure-of-an-mpeg-dash-mpd.html
1001 // http://www-itec.uni-klu.ac.at/dash/ddash/mpdGenerator.php?fragmentlength=15&type=full
1002 xmlNodePtr fragmenturl_node = NULL;
1003 segmentlists_tab[0] = representation_segmentlist_node;
1004 segmentlists_tab[1] = adaptionset_segmentlist_node;
1005 segmentlists_tab[2] = period_segmentlist_node;
1006
1007 val = get_val_from_nodes_tab(segmentlists_tab, 3, "duration");
1008 if (val) {
1009 rep->fragment_duration = (int64_t) strtoll(val, NULL, 10);
1010 av_log(s, AV_LOG_TRACE, "rep->fragment_duration = [%"PRId64"]\n", rep->fragment_duration);
1011 xmlFree(val);
1012 }
1013 val = get_val_from_nodes_tab(segmentlists_tab, 3, "timescale");
1014 if (val) {
1015 rep->fragment_timescale = (int64_t) strtoll(val, NULL, 10);
1016 av_log(s, AV_LOG_TRACE, "rep->fragment_timescale = [%"PRId64"]\n", rep->fragment_timescale);
1017 xmlFree(val);
1018 }
1019 val = get_val_from_nodes_tab(segmentlists_tab, 3, "startNumber");
1020 if (val) {
1021 rep->start_number = rep->first_seq_no = (int64_t) strtoll(val, NULL, 10);
1022 av_log(s, AV_LOG_TRACE, "rep->first_seq_no = [%"PRId64"]\n", rep->first_seq_no);
1023 xmlFree(val);
1024 }
1025
1026 fragmenturl_node = xmlFirstElementChild(representation_segmentlist_node);
1027 while (fragmenturl_node) {
1028 ret = parse_manifest_segmenturlnode(s, rep, fragmenturl_node,
1029 baseurl_nodes, rep->id,
1030 rep_bandwidth_val);
1031 if (ret < 0)
1032 goto free;
1033 fragmenturl_node = xmlNextElementSibling(fragmenturl_node);
1034 }
1035
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 goto free;
1045 fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
1046 }
1047 }
1048 } else {
1049 av_log(s, AV_LOG_ERROR, "Unknown format of Representation node id '%s' \n",
1050 rep->id ? rep->id : "");
1051 goto free;
1052 }
1053
1054 if (rep->fragment_duration > 0 && !rep->fragment_timescale)
1055 rep->fragment_timescale = 1;
1056 rep->bandwidth = rep_bandwidth_val ? atoi(rep_bandwidth_val) : 0;
1057 rep->framerate = av_make_q(0, 0);
1058 if (type == AVMEDIA_TYPE_VIDEO) {
1059 char *rep_framerate_val = xmlGetProp(representation_node, "frameRate");
1060 if (rep_framerate_val) {
1061 ret = av_parse_video_rate(&rep->framerate, rep_framerate_val);
1062 if (ret < 0)
1063 av_log(s, AV_LOG_VERBOSE, "Ignoring invalid frame rate '%s'\n", rep_framerate_val);
1064 xmlFree(rep_framerate_val);
1065 }
1066 }
1067
1068 switch (type) {
1069 case AVMEDIA_TYPE_VIDEO:
1070 ret = av_dynarray_add_nofree(&c->videos, &c->n_videos, rep);
1071 break;
1072 case AVMEDIA_TYPE_AUDIO:
1073 ret = av_dynarray_add_nofree(&c->audios, &c->n_audios, rep);
1074 break;
1075 case AVMEDIA_TYPE_SUBTITLE:
1076 ret = av_dynarray_add_nofree(&c->subtitles, &c->n_subtitles, rep);
1077 break;
1078 }
1079 if (ret < 0)
1080 goto free;
1081
1082 end:
1083 if (rep_bandwidth_val)
1084 xmlFree(rep_bandwidth_val);
1085
1086 return ret;
1087 enomem:
1088 ret = AVERROR(ENOMEM);
1089 free:
1090 free_representation(rep);
1091 goto end;
1092 }
1093
parse_manifest_adaptationset_attr(AVFormatContext * s,xmlNodePtr adaptionset_node)1094 static int parse_manifest_adaptationset_attr(AVFormatContext *s, xmlNodePtr adaptionset_node)
1095 {
1096 DASHContext *c = s->priv_data;
1097
1098 if (!adaptionset_node) {
1099 av_log(s, AV_LOG_WARNING, "Cannot get AdaptionSet\n");
1100 return AVERROR(EINVAL);
1101 }
1102 c->adaptionset_lang = xmlGetProp(adaptionset_node, "lang");
1103
1104 return 0;
1105 }
1106
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)1107 static int parse_manifest_adaptationset(AVFormatContext *s, const char *url,
1108 xmlNodePtr adaptionset_node,
1109 xmlNodePtr mpd_baseurl_node,
1110 xmlNodePtr period_baseurl_node,
1111 xmlNodePtr period_segmenttemplate_node,
1112 xmlNodePtr period_segmentlist_node)
1113 {
1114 int ret = 0;
1115 DASHContext *c = s->priv_data;
1116 xmlNodePtr fragment_template_node = NULL;
1117 xmlNodePtr content_component_node = NULL;
1118 xmlNodePtr adaptionset_baseurl_node = NULL;
1119 xmlNodePtr adaptionset_segmentlist_node = NULL;
1120 xmlNodePtr adaptionset_supplementalproperty_node = NULL;
1121 xmlNodePtr node = NULL;
1122
1123 ret = parse_manifest_adaptationset_attr(s, adaptionset_node);
1124 if (ret < 0)
1125 return ret;
1126
1127 node = xmlFirstElementChild(adaptionset_node);
1128 while (node) {
1129 if (!av_strcasecmp(node->name, "SegmentTemplate")) {
1130 fragment_template_node = node;
1131 } else if (!av_strcasecmp(node->name, "ContentComponent")) {
1132 content_component_node = node;
1133 } else if (!av_strcasecmp(node->name, "BaseURL")) {
1134 adaptionset_baseurl_node = node;
1135 } else if (!av_strcasecmp(node->name, "SegmentList")) {
1136 adaptionset_segmentlist_node = node;
1137 } else if (!av_strcasecmp(node->name, "SupplementalProperty")) {
1138 adaptionset_supplementalproperty_node = node;
1139 } else if (!av_strcasecmp(node->name, "Representation")) {
1140 ret = parse_manifest_representation(s, url, node,
1141 adaptionset_node,
1142 mpd_baseurl_node,
1143 period_baseurl_node,
1144 period_segmenttemplate_node,
1145 period_segmentlist_node,
1146 fragment_template_node,
1147 content_component_node,
1148 adaptionset_baseurl_node,
1149 adaptionset_segmentlist_node,
1150 adaptionset_supplementalproperty_node);
1151 if (ret < 0)
1152 goto err;
1153 }
1154 node = xmlNextElementSibling(node);
1155 }
1156
1157 err:
1158 xmlFree(c->adaptionset_lang);
1159 c->adaptionset_lang = NULL;
1160 return ret;
1161 }
1162
parse_programinformation(AVFormatContext * s,xmlNodePtr node)1163 static int parse_programinformation(AVFormatContext *s, xmlNodePtr node)
1164 {
1165 xmlChar *val = NULL;
1166
1167 node = xmlFirstElementChild(node);
1168 while (node) {
1169 if (!av_strcasecmp(node->name, "Title")) {
1170 val = xmlNodeGetContent(node);
1171 if (val) {
1172 av_dict_set(&s->metadata, "Title", val, 0);
1173 }
1174 } else if (!av_strcasecmp(node->name, "Source")) {
1175 val = xmlNodeGetContent(node);
1176 if (val) {
1177 av_dict_set(&s->metadata, "Source", val, 0);
1178 }
1179 } else if (!av_strcasecmp(node->name, "Copyright")) {
1180 val = xmlNodeGetContent(node);
1181 if (val) {
1182 av_dict_set(&s->metadata, "Copyright", val, 0);
1183 }
1184 }
1185 node = xmlNextElementSibling(node);
1186 xmlFree(val);
1187 val = NULL;
1188 }
1189 return 0;
1190 }
1191
parse_manifest(AVFormatContext * s,const char * url,AVIOContext * in)1192 static int parse_manifest(AVFormatContext *s, const char *url, AVIOContext *in)
1193 {
1194 DASHContext *c = s->priv_data;
1195 int ret = 0;
1196 int close_in = 0;
1197 int64_t filesize = 0;
1198 AVBPrint buf;
1199 AVDictionary *opts = NULL;
1200 xmlDoc *doc = NULL;
1201 xmlNodePtr root_element = NULL;
1202 xmlNodePtr node = NULL;
1203 xmlNodePtr period_node = NULL;
1204 xmlNodePtr tmp_node = NULL;
1205 xmlNodePtr mpd_baseurl_node = NULL;
1206 xmlNodePtr period_baseurl_node = NULL;
1207 xmlNodePtr period_segmenttemplate_node = NULL;
1208 xmlNodePtr period_segmentlist_node = NULL;
1209 xmlNodePtr adaptionset_node = NULL;
1210 xmlAttrPtr attr = NULL;
1211 char *val = NULL;
1212 uint32_t period_duration_sec = 0;
1213 uint32_t period_start_sec = 0;
1214
1215 if (!in) {
1216 close_in = 1;
1217
1218 av_dict_copy(&opts, c->avio_opts, 0);
1219 ret = avio_open2(&in, url, AVIO_FLAG_READ, c->interrupt_callback, &opts);
1220 av_dict_free(&opts);
1221 if (ret < 0)
1222 return ret;
1223 }
1224
1225 if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&c->base_url) < 0)
1226 c->base_url = av_strdup(url);
1227
1228 filesize = avio_size(in);
1229 filesize = filesize > 0 ? filesize : DEFAULT_MANIFEST_SIZE;
1230
1231 if (filesize > MAX_BPRINT_READ_SIZE) {
1232 av_log(s, AV_LOG_ERROR, "Manifest too large: %"PRId64"\n", filesize);
1233 return AVERROR_INVALIDDATA;
1234 }
1235
1236 av_bprint_init(&buf, filesize + 1, AV_BPRINT_SIZE_UNLIMITED);
1237
1238 if ((ret = avio_read_to_bprint(in, &buf, MAX_BPRINT_READ_SIZE)) < 0 ||
1239 !avio_feof(in) ||
1240 (filesize = buf.len) == 0) {
1241 av_log(s, AV_LOG_ERROR, "Unable to read to manifest '%s'\n", url);
1242 if (ret == 0)
1243 ret = AVERROR_INVALIDDATA;
1244 } else {
1245 LIBXML_TEST_VERSION
1246
1247 doc = xmlReadMemory(buf.str, filesize, c->base_url, NULL, 0);
1248 root_element = xmlDocGetRootElement(doc);
1249 node = root_element;
1250
1251 if (!node) {
1252 ret = AVERROR_INVALIDDATA;
1253 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing root node\n", url);
1254 goto cleanup;
1255 }
1256
1257 if (node->type != XML_ELEMENT_NODE ||
1258 av_strcasecmp(node->name, "MPD")) {
1259 ret = AVERROR_INVALIDDATA;
1260 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - wrong root node name[%s] type[%d]\n", url, node->name, (int)node->type);
1261 goto cleanup;
1262 }
1263
1264 val = xmlGetProp(node, "type");
1265 if (!val) {
1266 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing type attrib\n", url);
1267 ret = AVERROR_INVALIDDATA;
1268 goto cleanup;
1269 }
1270 if (!av_strcasecmp(val, "dynamic"))
1271 c->is_live = 1;
1272 xmlFree(val);
1273
1274 attr = node->properties;
1275 while (attr) {
1276 val = xmlGetProp(node, attr->name);
1277
1278 if (!av_strcasecmp(attr->name, "availabilityStartTime")) {
1279 c->availability_start_time = get_utc_date_time_insec(s, val);
1280 av_log(s, AV_LOG_TRACE, "c->availability_start_time = [%"PRId64"]\n", c->availability_start_time);
1281 } else if (!av_strcasecmp(attr->name, "availabilityEndTime")) {
1282 c->availability_end_time = get_utc_date_time_insec(s, val);
1283 av_log(s, AV_LOG_TRACE, "c->availability_end_time = [%"PRId64"]\n", c->availability_end_time);
1284 } else if (!av_strcasecmp(attr->name, "publishTime")) {
1285 c->publish_time = get_utc_date_time_insec(s, val);
1286 av_log(s, AV_LOG_TRACE, "c->publish_time = [%"PRId64"]\n", c->publish_time);
1287 } else if (!av_strcasecmp(attr->name, "minimumUpdatePeriod")) {
1288 c->minimum_update_period = get_duration_insec(s, val);
1289 av_log(s, AV_LOG_TRACE, "c->minimum_update_period = [%"PRId64"]\n", c->minimum_update_period);
1290 } else if (!av_strcasecmp(attr->name, "timeShiftBufferDepth")) {
1291 c->time_shift_buffer_depth = get_duration_insec(s, val);
1292 av_log(s, AV_LOG_TRACE, "c->time_shift_buffer_depth = [%"PRId64"]\n", c->time_shift_buffer_depth);
1293 } else if (!av_strcasecmp(attr->name, "minBufferTime")) {
1294 c->min_buffer_time = get_duration_insec(s, val);
1295 av_log(s, AV_LOG_TRACE, "c->min_buffer_time = [%"PRId64"]\n", c->min_buffer_time);
1296 } else if (!av_strcasecmp(attr->name, "suggestedPresentationDelay")) {
1297 c->suggested_presentation_delay = get_duration_insec(s, val);
1298 av_log(s, AV_LOG_TRACE, "c->suggested_presentation_delay = [%"PRId64"]\n", c->suggested_presentation_delay);
1299 } else if (!av_strcasecmp(attr->name, "mediaPresentationDuration")) {
1300 c->media_presentation_duration = get_duration_insec(s, val);
1301 av_log(s, AV_LOG_TRACE, "c->media_presentation_duration = [%"PRId64"]\n", c->media_presentation_duration);
1302 }
1303 attr = attr->next;
1304 xmlFree(val);
1305 }
1306
1307 tmp_node = find_child_node_by_name(node, "BaseURL");
1308 if (tmp_node) {
1309 mpd_baseurl_node = xmlCopyNode(tmp_node,1);
1310 } else {
1311 mpd_baseurl_node = xmlNewNode(NULL, "BaseURL");
1312 }
1313
1314 // at now we can handle only one period, with the longest duration
1315 node = xmlFirstElementChild(node);
1316 while (node) {
1317 if (!av_strcasecmp(node->name, "Period")) {
1318 period_duration_sec = 0;
1319 period_start_sec = 0;
1320 attr = node->properties;
1321 while (attr) {
1322 val = xmlGetProp(node, attr->name);
1323 if (!av_strcasecmp(attr->name, "duration")) {
1324 period_duration_sec = get_duration_insec(s, val);
1325 } else if (!av_strcasecmp(attr->name, "start")) {
1326 period_start_sec = get_duration_insec(s, val);
1327 }
1328 attr = attr->next;
1329 xmlFree(val);
1330 }
1331 if ((period_duration_sec) >= (c->period_duration)) {
1332 period_node = node;
1333 c->period_duration = period_duration_sec;
1334 c->period_start = period_start_sec;
1335 if (c->period_start > 0)
1336 c->media_presentation_duration = c->period_duration;
1337 }
1338 } else if (!av_strcasecmp(node->name, "ProgramInformation")) {
1339 parse_programinformation(s, node);
1340 }
1341 node = xmlNextElementSibling(node);
1342 }
1343 if (!period_node) {
1344 av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing Period node\n", url);
1345 ret = AVERROR_INVALIDDATA;
1346 goto cleanup;
1347 }
1348
1349 adaptionset_node = xmlFirstElementChild(period_node);
1350 while (adaptionset_node) {
1351 if (!av_strcasecmp(adaptionset_node->name, "BaseURL")) {
1352 period_baseurl_node = adaptionset_node;
1353 } else if (!av_strcasecmp(adaptionset_node->name, "SegmentTemplate")) {
1354 period_segmenttemplate_node = adaptionset_node;
1355 } else if (!av_strcasecmp(adaptionset_node->name, "SegmentList")) {
1356 period_segmentlist_node = adaptionset_node;
1357 } else if (!av_strcasecmp(adaptionset_node->name, "AdaptationSet")) {
1358 parse_manifest_adaptationset(s, url, adaptionset_node, mpd_baseurl_node, period_baseurl_node, period_segmenttemplate_node, period_segmentlist_node);
1359 }
1360 adaptionset_node = xmlNextElementSibling(adaptionset_node);
1361 }
1362 cleanup:
1363 /*free the document */
1364 xmlFreeDoc(doc);
1365 xmlCleanupParser();
1366 xmlFreeNode(mpd_baseurl_node);
1367 }
1368
1369 av_bprint_finalize(&buf, NULL);
1370 if (close_in) {
1371 avio_close(in);
1372 }
1373 return ret;
1374 }
1375
calc_cur_seg_no(AVFormatContext * s,struct representation * pls)1376 static int64_t calc_cur_seg_no(AVFormatContext *s, struct representation *pls)
1377 {
1378 DASHContext *c = s->priv_data;
1379 int64_t num = 0;
1380 int64_t start_time_offset = 0;
1381
1382 if (c->is_live) {
1383 if (pls->n_fragments) {
1384 av_log(s, AV_LOG_TRACE, "in n_fragments mode\n");
1385 num = pls->first_seq_no;
1386 } else if (pls->n_timelines) {
1387 av_log(s, AV_LOG_TRACE, "in n_timelines mode\n");
1388 start_time_offset = get_segment_start_time_based_on_timeline(pls, 0xFFFFFFFF) - 60 * pls->fragment_timescale; // 60 seconds before end
1389 num = calc_next_seg_no_from_timelines(pls, start_time_offset);
1390 if (num == -1)
1391 num = pls->first_seq_no;
1392 else
1393 num += pls->first_seq_no;
1394 } else if (pls->fragment_duration){
1395 av_log(s, AV_LOG_TRACE, "in fragment_duration mode fragment_timescale = %"PRId64", presentation_timeoffset = %"PRId64"\n", pls->fragment_timescale, pls->presentation_timeoffset);
1396 if (pls->presentation_timeoffset) {
1397 num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time) * pls->fragment_timescale)-pls->presentation_timeoffset) / pls->fragment_duration - c->min_buffer_time;
1398 } else if (c->publish_time > 0 && !c->availability_start_time) {
1399 if (c->min_buffer_time) {
1400 num = pls->first_seq_no + (((c->publish_time + pls->fragment_duration) - c->suggested_presentation_delay) * pls->fragment_timescale) / pls->fragment_duration - c->min_buffer_time;
1401 } else {
1402 num = pls->first_seq_no + (((c->publish_time - c->time_shift_buffer_depth + pls->fragment_duration) - c->suggested_presentation_delay) * pls->fragment_timescale) / pls->fragment_duration;
1403 }
1404 } else {
1405 num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time) - c->suggested_presentation_delay) * pls->fragment_timescale) / pls->fragment_duration;
1406 }
1407 }
1408 } else {
1409 num = pls->first_seq_no;
1410 }
1411 return num;
1412 }
1413
calc_min_seg_no(AVFormatContext * s,struct representation * pls)1414 static int64_t calc_min_seg_no(AVFormatContext *s, struct representation *pls)
1415 {
1416 DASHContext *c = s->priv_data;
1417 int64_t num = 0;
1418
1419 if (c->is_live && pls->fragment_duration) {
1420 av_log(s, AV_LOG_TRACE, "in live mode\n");
1421 num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time) - c->time_shift_buffer_depth) * pls->fragment_timescale) / pls->fragment_duration;
1422 } else {
1423 num = pls->first_seq_no;
1424 }
1425 return num;
1426 }
1427
calc_max_seg_no(struct representation * pls,DASHContext * c)1428 static int64_t calc_max_seg_no(struct representation *pls, DASHContext *c)
1429 {
1430 int64_t num = 0;
1431
1432 if (pls->n_fragments) {
1433 num = pls->first_seq_no + pls->n_fragments - 1;
1434 } else if (pls->n_timelines) {
1435 int i = 0;
1436 num = pls->first_seq_no + pls->n_timelines - 1;
1437 for (i = 0; i < pls->n_timelines; i++) {
1438 if (pls->timelines[i]->repeat == -1) {
1439 int length_of_each_segment = pls->timelines[i]->duration / pls->fragment_timescale;
1440 num = c->period_duration / length_of_each_segment;
1441 } else {
1442 num += pls->timelines[i]->repeat;
1443 }
1444 }
1445 } else if (c->is_live && pls->fragment_duration) {
1446 num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time)) * pls->fragment_timescale) / pls->fragment_duration;
1447 } else if (pls->fragment_duration) {
1448 num = pls->first_seq_no + (c->media_presentation_duration * pls->fragment_timescale) / pls->fragment_duration;
1449 }
1450
1451 return num;
1452 }
1453
move_timelines(struct representation * rep_src,struct representation * rep_dest,DASHContext * c)1454 static void move_timelines(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
1455 {
1456 if (rep_dest && rep_src ) {
1457 free_timelines_list(rep_dest);
1458 rep_dest->timelines = rep_src->timelines;
1459 rep_dest->n_timelines = rep_src->n_timelines;
1460 rep_dest->first_seq_no = rep_src->first_seq_no;
1461 rep_dest->last_seq_no = calc_max_seg_no(rep_dest, c);
1462 rep_src->timelines = NULL;
1463 rep_src->n_timelines = 0;
1464 rep_dest->cur_seq_no = rep_src->cur_seq_no;
1465 }
1466 }
1467
move_segments(struct representation * rep_src,struct representation * rep_dest,DASHContext * c)1468 static void move_segments(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
1469 {
1470 if (rep_dest && rep_src ) {
1471 free_fragment_list(rep_dest);
1472 if (rep_src->start_number > (rep_dest->start_number + rep_dest->n_fragments))
1473 rep_dest->cur_seq_no = 0;
1474 else
1475 rep_dest->cur_seq_no += rep_src->start_number - rep_dest->start_number;
1476 rep_dest->fragments = rep_src->fragments;
1477 rep_dest->n_fragments = rep_src->n_fragments;
1478 rep_dest->parent = rep_src->parent;
1479 rep_dest->last_seq_no = calc_max_seg_no(rep_dest, c);
1480 rep_src->fragments = NULL;
1481 rep_src->n_fragments = 0;
1482 }
1483 }
1484
1485
refresh_manifest(AVFormatContext * s)1486 static int refresh_manifest(AVFormatContext *s)
1487 {
1488 int ret = 0, i;
1489 DASHContext *c = s->priv_data;
1490 // save current context
1491 int n_videos = c->n_videos;
1492 struct representation **videos = c->videos;
1493 int n_audios = c->n_audios;
1494 struct representation **audios = c->audios;
1495 int n_subtitles = c->n_subtitles;
1496 struct representation **subtitles = c->subtitles;
1497 char *base_url = c->base_url;
1498
1499 c->base_url = NULL;
1500 c->n_videos = 0;
1501 c->videos = NULL;
1502 c->n_audios = 0;
1503 c->audios = NULL;
1504 c->n_subtitles = 0;
1505 c->subtitles = NULL;
1506 ret = parse_manifest(s, s->url, NULL);
1507 if (ret)
1508 goto finish;
1509
1510 if (c->n_videos != n_videos) {
1511 av_log(c, AV_LOG_ERROR,
1512 "new manifest has mismatched no. of video representations, %d -> %d\n",
1513 n_videos, c->n_videos);
1514 return AVERROR_INVALIDDATA;
1515 }
1516 if (c->n_audios != n_audios) {
1517 av_log(c, AV_LOG_ERROR,
1518 "new manifest has mismatched no. of audio representations, %d -> %d\n",
1519 n_audios, c->n_audios);
1520 return AVERROR_INVALIDDATA;
1521 }
1522 if (c->n_subtitles != n_subtitles) {
1523 av_log(c, AV_LOG_ERROR,
1524 "new manifest has mismatched no. of subtitles representations, %d -> %d\n",
1525 n_subtitles, c->n_subtitles);
1526 return AVERROR_INVALIDDATA;
1527 }
1528
1529 for (i = 0; i < n_videos; i++) {
1530 struct representation *cur_video = videos[i];
1531 struct representation *ccur_video = c->videos[i];
1532 if (cur_video->timelines) {
1533 // calc current time
1534 int64_t currentTime = get_segment_start_time_based_on_timeline(cur_video, cur_video->cur_seq_no) / cur_video->fragment_timescale;
1535 // update segments
1536 ccur_video->cur_seq_no = calc_next_seg_no_from_timelines(ccur_video, currentTime * cur_video->fragment_timescale - 1);
1537 if (ccur_video->cur_seq_no >= 0) {
1538 move_timelines(ccur_video, cur_video, c);
1539 }
1540 }
1541 if (cur_video->fragments) {
1542 move_segments(ccur_video, cur_video, c);
1543 }
1544 }
1545 for (i = 0; i < n_audios; i++) {
1546 struct representation *cur_audio = audios[i];
1547 struct representation *ccur_audio = c->audios[i];
1548 if (cur_audio->timelines) {
1549 // calc current time
1550 int64_t currentTime = get_segment_start_time_based_on_timeline(cur_audio, cur_audio->cur_seq_no) / cur_audio->fragment_timescale;
1551 // update segments
1552 ccur_audio->cur_seq_no = calc_next_seg_no_from_timelines(ccur_audio, currentTime * cur_audio->fragment_timescale - 1);
1553 if (ccur_audio->cur_seq_no >= 0) {
1554 move_timelines(ccur_audio, cur_audio, c);
1555 }
1556 }
1557 if (cur_audio->fragments) {
1558 move_segments(ccur_audio, cur_audio, c);
1559 }
1560 }
1561
1562 finish:
1563 // restore context
1564 if (c->base_url)
1565 av_free(base_url);
1566 else
1567 c->base_url = base_url;
1568
1569 if (c->subtitles)
1570 free_subtitle_list(c);
1571 if (c->audios)
1572 free_audio_list(c);
1573 if (c->videos)
1574 free_video_list(c);
1575
1576 c->n_subtitles = n_subtitles;
1577 c->subtitles = subtitles;
1578 c->n_audios = n_audios;
1579 c->audios = audios;
1580 c->n_videos = n_videos;
1581 c->videos = videos;
1582 return ret;
1583 }
1584
get_current_fragment(struct representation * pls)1585 static struct fragment *get_current_fragment(struct representation *pls)
1586 {
1587 int64_t min_seq_no = 0;
1588 int64_t max_seq_no = 0;
1589 struct fragment *seg = NULL;
1590 struct fragment *seg_ptr = NULL;
1591 DASHContext *c = pls->parent->priv_data;
1592
1593 while (( !ff_check_interrupt(c->interrupt_callback)&& pls->n_fragments > 0)) {
1594 if (pls->cur_seq_no < pls->n_fragments) {
1595 seg_ptr = pls->fragments[pls->cur_seq_no];
1596 seg = av_mallocz(sizeof(struct fragment));
1597 if (!seg) {
1598 return NULL;
1599 }
1600 seg->url = av_strdup(seg_ptr->url);
1601 if (!seg->url) {
1602 av_free(seg);
1603 return NULL;
1604 }
1605 seg->size = seg_ptr->size;
1606 seg->url_offset = seg_ptr->url_offset;
1607 return seg;
1608 } else if (c->is_live) {
1609 refresh_manifest(pls->parent);
1610 } else {
1611 break;
1612 }
1613 }
1614 if (c->is_live) {
1615 min_seq_no = calc_min_seg_no(pls->parent, pls);
1616 max_seq_no = calc_max_seg_no(pls, c);
1617
1618 if (pls->timelines || pls->fragments) {
1619 refresh_manifest(pls->parent);
1620 }
1621 if (pls->cur_seq_no <= min_seq_no) {
1622 av_log(pls->parent, AV_LOG_VERBOSE, "old fragment: cur[%"PRId64"] min[%"PRId64"] max[%"PRId64"]\n", (int64_t)pls->cur_seq_no, min_seq_no, max_seq_no);
1623 pls->cur_seq_no = calc_cur_seg_no(pls->parent, pls);
1624 } else if (pls->cur_seq_no > max_seq_no) {
1625 av_log(pls->parent, AV_LOG_VERBOSE, "new fragment: min[%"PRId64"] max[%"PRId64"]\n", min_seq_no, max_seq_no);
1626 }
1627 seg = av_mallocz(sizeof(struct fragment));
1628 if (!seg) {
1629 return NULL;
1630 }
1631 } else if (pls->cur_seq_no <= pls->last_seq_no) {
1632 seg = av_mallocz(sizeof(struct fragment));
1633 if (!seg) {
1634 return NULL;
1635 }
1636 }
1637 if (seg) {
1638 char *tmpfilename;
1639 if (!pls->url_template) {
1640 av_log(pls->parent, AV_LOG_ERROR, "Cannot get fragment, missing template URL\n");
1641 av_free(seg);
1642 return NULL;
1643 }
1644 tmpfilename = av_mallocz(c->max_url_size);
1645 if (!tmpfilename) {
1646 av_free(seg);
1647 return NULL;
1648 }
1649 ff_dash_fill_tmpl_params(tmpfilename, c->max_url_size, pls->url_template, 0, pls->cur_seq_no, 0, get_segment_start_time_based_on_timeline(pls, pls->cur_seq_no));
1650 seg->url = av_strireplace(pls->url_template, pls->url_template, tmpfilename);
1651 if (!seg->url) {
1652 av_log(pls->parent, AV_LOG_WARNING, "Unable to resolve template url '%s', try to use origin template\n", pls->url_template);
1653 seg->url = av_strdup(pls->url_template);
1654 if (!seg->url) {
1655 av_log(pls->parent, AV_LOG_ERROR, "Cannot resolve template url '%s'\n", pls->url_template);
1656 av_free(tmpfilename);
1657 av_free(seg);
1658 return NULL;
1659 }
1660 }
1661 av_free(tmpfilename);
1662 seg->size = -1;
1663 }
1664
1665 return seg;
1666 }
1667
read_from_url(struct representation * pls,struct fragment * seg,uint8_t * buf,int buf_size)1668 static int read_from_url(struct representation *pls, struct fragment *seg,
1669 uint8_t *buf, int buf_size)
1670 {
1671 int ret;
1672
1673 /* limit read if the fragment was only a part of a file */
1674 if (seg->size >= 0)
1675 buf_size = FFMIN(buf_size, pls->cur_seg_size - pls->cur_seg_offset);
1676
1677 ret = avio_read(pls->input, buf, buf_size);
1678 if (ret > 0)
1679 pls->cur_seg_offset += ret;
1680
1681 return ret;
1682 }
1683
open_input(DASHContext * c,struct representation * pls,struct fragment * seg)1684 static int open_input(DASHContext *c, struct representation *pls, struct fragment *seg)
1685 {
1686 AVDictionary *opts = NULL;
1687 char *url = NULL;
1688 int ret = 0;
1689
1690 url = av_mallocz(c->max_url_size);
1691 if (!url) {
1692 ret = AVERROR(ENOMEM);
1693 goto cleanup;
1694 }
1695
1696 if (seg->size >= 0) {
1697 /* try to restrict the HTTP request to the part we want
1698 * (if this is in fact a HTTP request) */
1699 av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1700 av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1701 }
1702
1703 ff_make_absolute_url(url, c->max_url_size, c->base_url, seg->url);
1704 av_log(pls->parent, AV_LOG_VERBOSE, "DASH request for url '%s', offset %"PRId64"\n",
1705 url, seg->url_offset);
1706 ret = open_url(pls->parent, &pls->input, url, &c->avio_opts, opts, NULL);
1707
1708 cleanup:
1709 av_free(url);
1710 av_dict_free(&opts);
1711 pls->cur_seg_offset = 0;
1712 pls->cur_seg_size = seg->size;
1713 return ret;
1714 }
1715
update_init_section(struct representation * pls)1716 static int update_init_section(struct representation *pls)
1717 {
1718 static const int max_init_section_size = 1024 * 1024;
1719 DASHContext *c = pls->parent->priv_data;
1720 int64_t sec_size;
1721 int64_t urlsize;
1722 int ret;
1723
1724 if (!pls->init_section || pls->init_sec_buf)
1725 return 0;
1726
1727 ret = open_input(c, pls, pls->init_section);
1728 if (ret < 0) {
1729 av_log(pls->parent, AV_LOG_WARNING,
1730 "Failed to open an initialization section\n");
1731 return ret;
1732 }
1733
1734 if (pls->init_section->size >= 0)
1735 sec_size = pls->init_section->size;
1736 else if ((urlsize = avio_size(pls->input)) >= 0)
1737 sec_size = urlsize;
1738 else
1739 sec_size = max_init_section_size;
1740
1741 av_log(pls->parent, AV_LOG_DEBUG,
1742 "Downloading an initialization section of size %"PRId64"\n",
1743 sec_size);
1744
1745 sec_size = FFMIN(sec_size, max_init_section_size);
1746
1747 av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1748
1749 ret = read_from_url(pls, pls->init_section, pls->init_sec_buf,
1750 pls->init_sec_buf_size);
1751 ff_format_io_close(pls->parent, &pls->input);
1752
1753 if (ret < 0)
1754 return ret;
1755
1756 pls->init_sec_data_len = ret;
1757 pls->init_sec_buf_read_offset = 0;
1758
1759 return 0;
1760 }
1761
seek_data(void * opaque,int64_t offset,int whence)1762 static int64_t seek_data(void *opaque, int64_t offset, int whence)
1763 {
1764 struct representation *v = opaque;
1765 if (v->n_fragments && !v->init_sec_data_len) {
1766 return avio_seek(v->input, offset, whence);
1767 }
1768
1769 return AVERROR(ENOSYS);
1770 }
1771
read_data(void * opaque,uint8_t * buf,int buf_size)1772 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1773 {
1774 int ret = 0;
1775 struct representation *v = opaque;
1776 DASHContext *c = v->parent->priv_data;
1777
1778 restart:
1779 if (!v->input) {
1780 free_fragment(&v->cur_seg);
1781 v->cur_seg = get_current_fragment(v);
1782 if (!v->cur_seg) {
1783 ret = AVERROR_EOF;
1784 goto end;
1785 }
1786
1787 /* load/update Media Initialization Section, if any */
1788 ret = update_init_section(v);
1789 if (ret)
1790 goto end;
1791
1792 ret = open_input(c, v, v->cur_seg);
1793 if (ret < 0) {
1794 if (ff_check_interrupt(c->interrupt_callback)) {
1795 ret = AVERROR_EXIT;
1796 goto end;
1797 }
1798 av_log(v->parent, AV_LOG_WARNING, "Failed to open fragment of playlist\n");
1799 v->cur_seq_no++;
1800 goto restart;
1801 }
1802 }
1803
1804 if (v->init_sec_buf_read_offset < v->init_sec_data_len) {
1805 /* Push init section out first before first actual fragment */
1806 int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1807 memcpy(buf, v->init_sec_buf, copy_size);
1808 v->init_sec_buf_read_offset += copy_size;
1809 ret = copy_size;
1810 goto end;
1811 }
1812
1813 /* check the v->cur_seg, if it is null, get current and double check if the new v->cur_seg*/
1814 if (!v->cur_seg) {
1815 v->cur_seg = get_current_fragment(v);
1816 }
1817 if (!v->cur_seg) {
1818 ret = AVERROR_EOF;
1819 goto end;
1820 }
1821 ret = read_from_url(v, v->cur_seg, buf, buf_size);
1822 if (ret > 0)
1823 goto end;
1824
1825 if (c->is_live || v->cur_seq_no < v->last_seq_no) {
1826 if (!v->is_restart_needed)
1827 v->cur_seq_no++;
1828 v->is_restart_needed = 1;
1829 }
1830
1831 end:
1832 return ret;
1833 }
1834
save_avio_options(AVFormatContext * s)1835 static int save_avio_options(AVFormatContext *s)
1836 {
1837 DASHContext *c = s->priv_data;
1838 const char *opts[] = {
1839 "headers", "user_agent", "cookies", "http_proxy", "referer", "rw_timeout", "icy", NULL };
1840 const char **opt = opts;
1841 uint8_t *buf = NULL;
1842 int ret = 0;
1843
1844 while (*opt) {
1845 if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >= 0) {
1846 if (buf[0] != '\0') {
1847 ret = av_dict_set(&c->avio_opts, *opt, buf, AV_DICT_DONT_STRDUP_VAL);
1848 if (ret < 0)
1849 return ret;
1850 } else {
1851 av_freep(&buf);
1852 }
1853 }
1854 opt++;
1855 }
1856
1857 return ret;
1858 }
1859
nested_io_open(AVFormatContext * s,AVIOContext ** pb,const char * url,int flags,AVDictionary ** opts)1860 static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1861 int flags, AVDictionary **opts)
1862 {
1863 av_log(s, AV_LOG_ERROR,
1864 "A DASH playlist item '%s' referred to an external file '%s'. "
1865 "Opening this file was forbidden for security reasons\n",
1866 s->url, url);
1867 return AVERROR(EPERM);
1868 }
1869
close_demux_for_component(struct representation * pls)1870 static void close_demux_for_component(struct representation *pls)
1871 {
1872 /* note: the internal buffer could have changed */
1873 av_freep(&pls->pb.buffer);
1874 memset(&pls->pb, 0x00, sizeof(AVIOContext));
1875 pls->ctx->pb = NULL;
1876 avformat_close_input(&pls->ctx);
1877 }
1878
reopen_demux_for_component(AVFormatContext * s,struct representation * pls)1879 static int reopen_demux_for_component(AVFormatContext *s, struct representation *pls)
1880 {
1881 DASHContext *c = s->priv_data;
1882 ff_const59 AVInputFormat *in_fmt = NULL;
1883 AVDictionary *in_fmt_opts = NULL;
1884 uint8_t *avio_ctx_buffer = NULL;
1885 int ret = 0, i;
1886
1887 if (pls->ctx) {
1888 close_demux_for_component(pls);
1889 }
1890
1891 if (ff_check_interrupt(&s->interrupt_callback)) {
1892 ret = AVERROR_EXIT;
1893 goto fail;
1894 }
1895
1896 if (!(pls->ctx = avformat_alloc_context())) {
1897 ret = AVERROR(ENOMEM);
1898 goto fail;
1899 }
1900
1901 avio_ctx_buffer = av_malloc(INITIAL_BUFFER_SIZE);
1902 if (!avio_ctx_buffer ) {
1903 ret = AVERROR(ENOMEM);
1904 avformat_free_context(pls->ctx);
1905 pls->ctx = NULL;
1906 goto fail;
1907 }
1908 ffio_init_context(&pls->pb, avio_ctx_buffer, INITIAL_BUFFER_SIZE, 0,
1909 pls, read_data, NULL, c->is_live ? NULL : seek_data);
1910 pls->pb.seekable = 0;
1911
1912 if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
1913 goto fail;
1914
1915 pls->ctx->flags = AVFMT_FLAG_CUSTOM_IO;
1916 pls->ctx->probesize = s->probesize > 0 ? s->probesize : 1024 * 4;
1917 pls->ctx->max_analyze_duration = s->max_analyze_duration > 0 ? s->max_analyze_duration : 4 * AV_TIME_BASE;
1918 pls->ctx->interrupt_callback = s->interrupt_callback;
1919 ret = av_probe_input_buffer(&pls->pb, &in_fmt, "", NULL, 0, 0);
1920 if (ret < 0) {
1921 av_log(s, AV_LOG_ERROR, "Error when loading first fragment of playlist\n");
1922 avformat_free_context(pls->ctx);
1923 pls->ctx = NULL;
1924 goto fail;
1925 }
1926
1927 pls->ctx->pb = &pls->pb;
1928 pls->ctx->io_open = nested_io_open;
1929
1930 // provide additional information from mpd if available
1931 ret = avformat_open_input(&pls->ctx, "", in_fmt, &in_fmt_opts); //pls->init_section->url
1932 av_dict_free(&in_fmt_opts);
1933 if (ret < 0)
1934 goto fail;
1935 if (pls->n_fragments) {
1936 #if FF_API_R_FRAME_RATE
1937 if (pls->framerate.den) {
1938 for (i = 0; i < pls->ctx->nb_streams; i++)
1939 pls->ctx->streams[i]->r_frame_rate = pls->framerate;
1940 }
1941 #endif
1942 ret = avformat_find_stream_info(pls->ctx, NULL);
1943 if (ret < 0)
1944 goto fail;
1945 }
1946
1947 fail:
1948 return ret;
1949 }
1950
open_demux_for_component(AVFormatContext * s,struct representation * pls)1951 static int open_demux_for_component(AVFormatContext *s, struct representation *pls)
1952 {
1953 int ret = 0;
1954 int i;
1955
1956 pls->parent = s;
1957 pls->cur_seq_no = calc_cur_seg_no(s, pls);
1958
1959 if (!pls->last_seq_no) {
1960 pls->last_seq_no = calc_max_seg_no(pls, s->priv_data);
1961 }
1962
1963 ret = reopen_demux_for_component(s, pls);
1964 if (ret < 0) {
1965 goto fail;
1966 }
1967 for (i = 0; i < pls->ctx->nb_streams; i++) {
1968 AVStream *st = avformat_new_stream(s, NULL);
1969 AVStream *ist = pls->ctx->streams[i];
1970 if (!st) {
1971 ret = AVERROR(ENOMEM);
1972 goto fail;
1973 }
1974 st->id = i;
1975 avcodec_parameters_copy(st->codecpar, ist->codecpar);
1976 avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, ist->time_base.den);
1977
1978 // copy disposition
1979 st->disposition = ist->disposition;
1980
1981 // copy side data
1982 for (int i = 0; i < ist->nb_side_data; i++) {
1983 const AVPacketSideData *sd_src = &ist->side_data[i];
1984 uint8_t *dst_data;
1985
1986 dst_data = av_stream_new_side_data(st, sd_src->type, sd_src->size);
1987 if (!dst_data)
1988 return AVERROR(ENOMEM);
1989 memcpy(dst_data, sd_src->data, sd_src->size);
1990 }
1991 }
1992
1993 return 0;
1994 fail:
1995 return ret;
1996 }
1997
is_common_init_section_exist(struct representation ** pls,int n_pls)1998 static int is_common_init_section_exist(struct representation **pls, int n_pls)
1999 {
2000 struct fragment *first_init_section = pls[0]->init_section;
2001 char *url =NULL;
2002 int64_t url_offset = -1;
2003 int64_t size = -1;
2004 int i = 0;
2005
2006 if (first_init_section == NULL || n_pls == 0)
2007 return 0;
2008
2009 url = first_init_section->url;
2010 url_offset = first_init_section->url_offset;
2011 size = pls[0]->init_section->size;
2012 for (i=0;i<n_pls;i++) {
2013 if (!pls[i]->init_section)
2014 continue;
2015
2016 if (av_strcasecmp(pls[i]->init_section->url, url) ||
2017 pls[i]->init_section->url_offset != url_offset ||
2018 pls[i]->init_section->size != size) {
2019 return 0;
2020 }
2021 }
2022 return 1;
2023 }
2024
copy_init_section(struct representation * rep_dest,struct representation * rep_src)2025 static int copy_init_section(struct representation *rep_dest, struct representation *rep_src)
2026 {
2027 rep_dest->init_sec_buf = av_mallocz(rep_src->init_sec_buf_size);
2028 if (!rep_dest->init_sec_buf) {
2029 av_log(rep_dest->ctx, AV_LOG_WARNING, "Cannot alloc memory for init_sec_buf\n");
2030 return AVERROR(ENOMEM);
2031 }
2032 memcpy(rep_dest->init_sec_buf, rep_src->init_sec_buf, rep_src->init_sec_data_len);
2033 rep_dest->init_sec_buf_size = rep_src->init_sec_buf_size;
2034 rep_dest->init_sec_data_len = rep_src->init_sec_data_len;
2035 rep_dest->cur_timestamp = rep_src->cur_timestamp;
2036
2037 return 0;
2038 }
2039
2040 static int dash_close(AVFormatContext *s);
2041
move_metadata(AVStream * st,const char * key,char ** value)2042 static void move_metadata(AVStream *st, const char *key, char **value)
2043 {
2044 if (*value) {
2045 av_dict_set(&st->metadata, key, *value, AV_DICT_DONT_STRDUP_VAL);
2046 *value = NULL;
2047 }
2048 }
2049
dash_read_header(AVFormatContext * s)2050 static int dash_read_header(AVFormatContext *s)
2051 {
2052 DASHContext *c = s->priv_data;
2053 struct representation *rep;
2054 AVProgram *program;
2055 int ret = 0;
2056 int stream_index = 0;
2057 int i;
2058
2059 c->interrupt_callback = &s->interrupt_callback;
2060
2061 if ((ret = save_avio_options(s)) < 0)
2062 goto fail;
2063
2064 if ((ret = parse_manifest(s, s->url, s->pb)) < 0)
2065 goto fail;
2066
2067 /* If this isn't a live stream, fill the total duration of the
2068 * stream. */
2069 if (!c->is_live) {
2070 s->duration = (int64_t) c->media_presentation_duration * AV_TIME_BASE;
2071 } else {
2072 av_dict_set(&c->avio_opts, "seekable", "0", 0);
2073 }
2074
2075 if(c->n_videos)
2076 c->is_init_section_common_video = is_common_init_section_exist(c->videos, c->n_videos);
2077
2078 /* Open the demuxer for video and audio components if available */
2079 for (i = 0; i < c->n_videos; i++) {
2080 rep = c->videos[i];
2081 if (i > 0 && c->is_init_section_common_video) {
2082 ret = copy_init_section(rep, c->videos[0]);
2083 if (ret < 0)
2084 goto fail;
2085 }
2086 ret = open_demux_for_component(s, rep);
2087
2088 if (ret)
2089 goto fail;
2090 rep->stream_index = stream_index;
2091 ++stream_index;
2092 }
2093
2094 if(c->n_audios)
2095 c->is_init_section_common_audio = is_common_init_section_exist(c->audios, c->n_audios);
2096
2097 for (i = 0; i < c->n_audios; i++) {
2098 rep = c->audios[i];
2099 if (i > 0 && c->is_init_section_common_audio) {
2100 ret = copy_init_section(rep, c->audios[0]);
2101 if (ret < 0)
2102 goto fail;
2103 }
2104 ret = open_demux_for_component(s, rep);
2105
2106 if (ret)
2107 goto fail;
2108 rep->stream_index = stream_index;
2109 ++stream_index;
2110 }
2111
2112 if (c->n_subtitles)
2113 c->is_init_section_common_subtitle = is_common_init_section_exist(c->subtitles, c->n_subtitles);
2114
2115 for (i = 0; i < c->n_subtitles; i++) {
2116 rep = c->subtitles[i];
2117 if (i > 0 && c->is_init_section_common_subtitle) {
2118 ret = copy_init_section(rep, c->subtitles[0]);
2119 if (ret < 0)
2120 goto fail;
2121 }
2122 ret = open_demux_for_component(s, rep);
2123
2124 if (ret)
2125 goto fail;
2126 rep->stream_index = stream_index;
2127 ++stream_index;
2128 }
2129
2130 if (!stream_index) {
2131 ret = AVERROR_INVALIDDATA;
2132 goto fail;
2133 }
2134
2135 /* Create a program */
2136 program = av_new_program(s, 0);
2137 if (!program) {
2138 ret = AVERROR(ENOMEM);
2139 goto fail;
2140 }
2141
2142 for (i = 0; i < c->n_videos; i++) {
2143 rep = c->videos[i];
2144 av_program_add_stream_index(s, 0, rep->stream_index);
2145 rep->assoc_stream = s->streams[rep->stream_index];
2146 if (rep->bandwidth > 0)
2147 av_dict_set_int(&rep->assoc_stream->metadata, "variant_bitrate", rep->bandwidth, 0);
2148 move_metadata(rep->assoc_stream, "id", &rep->id);
2149 }
2150 for (i = 0; i < c->n_audios; i++) {
2151 rep = c->audios[i];
2152 av_program_add_stream_index(s, 0, rep->stream_index);
2153 rep->assoc_stream = s->streams[rep->stream_index];
2154 if (rep->bandwidth > 0)
2155 av_dict_set_int(&rep->assoc_stream->metadata, "variant_bitrate", rep->bandwidth, 0);
2156 move_metadata(rep->assoc_stream, "id", &rep->id);
2157 move_metadata(rep->assoc_stream, "language", &rep->lang);
2158 }
2159 for (i = 0; i < c->n_subtitles; i++) {
2160 rep = c->subtitles[i];
2161 av_program_add_stream_index(s, 0, rep->stream_index);
2162 rep->assoc_stream = s->streams[rep->stream_index];
2163 move_metadata(rep->assoc_stream, "id", &rep->id);
2164 move_metadata(rep->assoc_stream, "language", &rep->lang);
2165 }
2166
2167 return 0;
2168 fail:
2169 dash_close(s);
2170 return ret;
2171 }
2172
recheck_discard_flags(AVFormatContext * s,struct representation ** p,int n)2173 static void recheck_discard_flags(AVFormatContext *s, struct representation **p, int n)
2174 {
2175 int i, j;
2176
2177 for (i = 0; i < n; i++) {
2178 struct representation *pls = p[i];
2179 int needed = !pls->assoc_stream || pls->assoc_stream->discard < AVDISCARD_ALL;
2180
2181 if (needed && !pls->ctx) {
2182 pls->cur_seg_offset = 0;
2183 pls->init_sec_buf_read_offset = 0;
2184 /* Catch up */
2185 for (j = 0; j < n; j++) {
2186 pls->cur_seq_no = FFMAX(pls->cur_seq_no, p[j]->cur_seq_no);
2187 }
2188 reopen_demux_for_component(s, pls);
2189 av_log(s, AV_LOG_INFO, "Now receiving stream_index %d\n", pls->stream_index);
2190 } else if (!needed && pls->ctx) {
2191 close_demux_for_component(pls);
2192 ff_format_io_close(pls->parent, &pls->input);
2193 av_log(s, AV_LOG_INFO, "No longer receiving stream_index %d\n", pls->stream_index);
2194 }
2195 }
2196 }
2197
dash_read_packet(AVFormatContext * s,AVPacket * pkt)2198 static int dash_read_packet(AVFormatContext *s, AVPacket *pkt)
2199 {
2200 DASHContext *c = s->priv_data;
2201 int ret = 0, i;
2202 int64_t mints = 0;
2203 struct representation *cur = NULL;
2204 struct representation *rep = NULL;
2205
2206 recheck_discard_flags(s, c->videos, c->n_videos);
2207 recheck_discard_flags(s, c->audios, c->n_audios);
2208 recheck_discard_flags(s, c->subtitles, c->n_subtitles);
2209
2210 for (i = 0; i < c->n_videos; i++) {
2211 rep = c->videos[i];
2212 if (!rep->ctx)
2213 continue;
2214 if (!cur || rep->cur_timestamp < mints) {
2215 cur = rep;
2216 mints = rep->cur_timestamp;
2217 }
2218 }
2219 for (i = 0; i < c->n_audios; i++) {
2220 rep = c->audios[i];
2221 if (!rep->ctx)
2222 continue;
2223 if (!cur || rep->cur_timestamp < mints) {
2224 cur = rep;
2225 mints = rep->cur_timestamp;
2226 }
2227 }
2228
2229 for (i = 0; i < c->n_subtitles; i++) {
2230 rep = c->subtitles[i];
2231 if (!rep->ctx)
2232 continue;
2233 if (!cur || rep->cur_timestamp < mints) {
2234 cur = rep;
2235 mints = rep->cur_timestamp;
2236 }
2237 }
2238
2239 if (!cur) {
2240 return AVERROR_INVALIDDATA;
2241 }
2242 while (!ff_check_interrupt(c->interrupt_callback) && !ret) {
2243 ret = av_read_frame(cur->ctx, pkt);
2244 if (ret >= 0) {
2245 /* If we got a packet, return it */
2246 cur->cur_timestamp = av_rescale(pkt->pts, (int64_t)cur->ctx->streams[0]->time_base.num * 90000, cur->ctx->streams[0]->time_base.den);
2247 pkt->stream_index = cur->stream_index;
2248 return 0;
2249 }
2250 if (cur->is_restart_needed) {
2251 cur->cur_seg_offset = 0;
2252 cur->init_sec_buf_read_offset = 0;
2253 ff_format_io_close(cur->parent, &cur->input);
2254 ret = reopen_demux_for_component(s, cur);
2255 cur->is_restart_needed = 0;
2256 }
2257 }
2258 return AVERROR_EOF;
2259 }
2260
dash_close(AVFormatContext * s)2261 static int dash_close(AVFormatContext *s)
2262 {
2263 DASHContext *c = s->priv_data;
2264 free_audio_list(c);
2265 free_video_list(c);
2266 free_subtitle_list(c);
2267 av_dict_free(&c->avio_opts);
2268 av_freep(&c->base_url);
2269 return 0;
2270 }
2271
dash_seek(AVFormatContext * s,struct representation * pls,int64_t seek_pos_msec,int flags,int dry_run)2272 static int dash_seek(AVFormatContext *s, struct representation *pls, int64_t seek_pos_msec, int flags, int dry_run)
2273 {
2274 int ret = 0;
2275 int i = 0;
2276 int j = 0;
2277 int64_t duration = 0;
2278
2279 av_log(pls->parent, AV_LOG_VERBOSE, "DASH seek pos[%"PRId64"ms] %s\n",
2280 seek_pos_msec, dry_run ? " (dry)" : "");
2281
2282 // single fragment mode
2283 if (pls->n_fragments == 1) {
2284 pls->cur_timestamp = 0;
2285 pls->cur_seg_offset = 0;
2286 if (dry_run)
2287 return 0;
2288 ff_read_frame_flush(pls->ctx);
2289 return av_seek_frame(pls->ctx, -1, seek_pos_msec * 1000, flags);
2290 }
2291
2292 ff_format_io_close(pls->parent, &pls->input);
2293
2294 // find the nearest fragment
2295 if (pls->n_timelines > 0 && pls->fragment_timescale > 0) {
2296 int64_t num = pls->first_seq_no;
2297 av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline start n_timelines[%d] "
2298 "last_seq_no[%"PRId64"].\n",
2299 (int)pls->n_timelines, (int64_t)pls->last_seq_no);
2300 for (i = 0; i < pls->n_timelines; i++) {
2301 if (pls->timelines[i]->starttime > 0) {
2302 duration = pls->timelines[i]->starttime;
2303 }
2304 duration += pls->timelines[i]->duration;
2305 if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
2306 goto set_seq_num;
2307 }
2308 for (j = 0; j < pls->timelines[i]->repeat; j++) {
2309 duration += pls->timelines[i]->duration;
2310 num++;
2311 if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
2312 goto set_seq_num;
2313 }
2314 }
2315 num++;
2316 }
2317
2318 set_seq_num:
2319 pls->cur_seq_no = num > pls->last_seq_no ? pls->last_seq_no : num;
2320 av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline end cur_seq_no[%"PRId64"].\n",
2321 (int64_t)pls->cur_seq_no);
2322 } else if (pls->fragment_duration > 0) {
2323 pls->cur_seq_no = pls->first_seq_no + ((seek_pos_msec * pls->fragment_timescale) / pls->fragment_duration) / 1000;
2324 } else {
2325 av_log(pls->parent, AV_LOG_ERROR, "dash_seek missing timeline or fragment_duration\n");
2326 pls->cur_seq_no = pls->first_seq_no;
2327 }
2328 pls->cur_timestamp = 0;
2329 pls->cur_seg_offset = 0;
2330 pls->init_sec_buf_read_offset = 0;
2331 ret = dry_run ? 0 : reopen_demux_for_component(s, pls);
2332
2333 return ret;
2334 }
2335
dash_read_seek(AVFormatContext * s,int stream_index,int64_t timestamp,int flags)2336 static int dash_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
2337 {
2338 int ret = 0, i;
2339 DASHContext *c = s->priv_data;
2340 int64_t seek_pos_msec = av_rescale_rnd(timestamp, 1000,
2341 s->streams[stream_index]->time_base.den,
2342 flags & AVSEEK_FLAG_BACKWARD ?
2343 AV_ROUND_DOWN : AV_ROUND_UP);
2344 if ((flags & AVSEEK_FLAG_BYTE) || c->is_live)
2345 return AVERROR(ENOSYS);
2346
2347 /* Seek in discarded streams with dry_run=1 to avoid reopening them */
2348 for (i = 0; i < c->n_videos; i++) {
2349 if (!ret)
2350 ret = dash_seek(s, c->videos[i], seek_pos_msec, flags, !c->videos[i]->ctx);
2351 }
2352 for (i = 0; i < c->n_audios; i++) {
2353 if (!ret)
2354 ret = dash_seek(s, c->audios[i], seek_pos_msec, flags, !c->audios[i]->ctx);
2355 }
2356 for (i = 0; i < c->n_subtitles; i++) {
2357 if (!ret)
2358 ret = dash_seek(s, c->subtitles[i], seek_pos_msec, flags, !c->subtitles[i]->ctx);
2359 }
2360
2361 return ret;
2362 }
2363
dash_probe(const AVProbeData * p)2364 static int dash_probe(const AVProbeData *p)
2365 {
2366 if (!av_stristr(p->buf, "<MPD"))
2367 return 0;
2368
2369 if (av_stristr(p->buf, "dash:profile:isoff-on-demand:2011") ||
2370 av_stristr(p->buf, "dash:profile:isoff-live:2011") ||
2371 av_stristr(p->buf, "dash:profile:isoff-live:2012") ||
2372 av_stristr(p->buf, "dash:profile:isoff-main:2011") ||
2373 av_stristr(p->buf, "3GPP:PSS:profile:DASH1")) {
2374 return AVPROBE_SCORE_MAX;
2375 }
2376 if (av_stristr(p->buf, "dash:profile")) {
2377 return AVPROBE_SCORE_MAX;
2378 }
2379
2380 return 0;
2381 }
2382
2383 #define OFFSET(x) offsetof(DASHContext, x)
2384 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2385 static const AVOption dash_options[] = {
2386 {"allowed_extensions", "List of file extensions that dash is allowed to access",
2387 OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2388 {.str = "aac,m4a,m4s,m4v,mov,mp4,webm,ts"},
2389 INT_MIN, INT_MAX, FLAGS},
2390 {NULL}
2391 };
2392
2393 static const AVClass dash_class = {
2394 .class_name = "dash",
2395 .item_name = av_default_item_name,
2396 .option = dash_options,
2397 .version = LIBAVUTIL_VERSION_INT,
2398 };
2399
2400 AVInputFormat ff_dash_demuxer = {
2401 .name = "dash",
2402 .long_name = NULL_IF_CONFIG_SMALL("Dynamic Adaptive Streaming over HTTP"),
2403 .priv_class = &dash_class,
2404 .priv_data_size = sizeof(DASHContext),
2405 .read_probe = dash_probe,
2406 .read_header = dash_read_header,
2407 .read_packet = dash_read_packet,
2408 .read_close = dash_close,
2409 .read_seek = dash_read_seek,
2410 .flags = AVFMT_NO_BYTE_SEEK,
2411 };
2412