applehttp: Use half the target duration as interval if the playlist didn't update
[libav.git] / libavformat / applehttp.c
1 /*
2 * Apple HTTP Live Streaming demuxer
3 * Copyright (c) 2010 Martin Storsjo
4 *
5 * This file is part of Libav.
6 *
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file
24 * Apple HTTP Live Streaming demuxer
25 * http://tools.ietf.org/html/draft-pantos-http-live-streaming
26 */
27
28 #include "libavutil/avstring.h"
29 #include "libavutil/intreadwrite.h"
30 #include "libavutil/mathematics.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/dict.h"
33 #include "avformat.h"
34 #include "internal.h"
35 #include <unistd.h>
36 #include "avio_internal.h"
37 #include "url.h"
38
39 #define INITIAL_BUFFER_SIZE 32768
40
41 /*
42 * An apple http stream consists of a playlist with media segment files,
43 * played sequentially. There may be several playlists with the same
44 * video content, in different bandwidth variants, that are played in
45 * parallel (preferrably only one bandwidth variant at a time). In this case,
46 * the user supplied the url to a main playlist that only lists the variant
47 * playlists.
48 *
49 * If the main playlist doesn't point at any variants, we still create
50 * one anonymous toplevel variant for this, to maintain the structure.
51 */
52
53 enum KeyType {
54 KEY_NONE,
55 KEY_AES_128,
56 };
57
58 struct segment {
59 int duration;
60 char url[MAX_URL_SIZE];
61 char key[MAX_URL_SIZE];
62 enum KeyType key_type;
63 uint8_t iv[16];
64 };
65
66 /*
67 * Each variant has its own demuxer. If it currently is active,
68 * it has an open AVIOContext too, and potentially an AVPacket
69 * containing the next packet from this stream.
70 */
71 struct variant {
72 int bandwidth;
73 char url[MAX_URL_SIZE];
74 AVIOContext pb;
75 uint8_t* read_buffer;
76 URLContext *input;
77 AVFormatContext *parent;
78 int index;
79 AVFormatContext *ctx;
80 AVPacket pkt;
81 int stream_offset;
82
83 int finished;
84 int target_duration;
85 int start_seq_no;
86 int n_segments;
87 struct segment **segments;
88 int needed, cur_needed;
89 int cur_seq_no;
90 int64_t last_load_time;
91
92 char key_url[MAX_URL_SIZE];
93 uint8_t key[16];
94 };
95
96 typedef struct AppleHTTPContext {
97 int n_variants;
98 struct variant **variants;
99 int cur_seq_no;
100 int end_of_segment;
101 int first_packet;
102 int64_t first_timestamp;
103 AVIOInterruptCB *interrupt_callback;
104 } AppleHTTPContext;
105
106 static int read_chomp_line(AVIOContext *s, char *buf, int maxlen)
107 {
108 int len = ff_get_line(s, buf, maxlen);
109 while (len > 0 && isspace(buf[len - 1]))
110 buf[--len] = '\0';
111 return len;
112 }
113
114 static void free_segment_list(struct variant *var)
115 {
116 int i;
117 for (i = 0; i < var->n_segments; i++)
118 av_free(var->segments[i]);
119 av_freep(&var->segments);
120 var->n_segments = 0;
121 }
122
123 static void free_variant_list(AppleHTTPContext *c)
124 {
125 int i;
126 for (i = 0; i < c->n_variants; i++) {
127 struct variant *var = c->variants[i];
128 free_segment_list(var);
129 av_free_packet(&var->pkt);
130 av_free(var->pb.buffer);
131 if (var->input)
132 ffurl_close(var->input);
133 if (var->ctx) {
134 var->ctx->pb = NULL;
135 avformat_close_input(&var->ctx);
136 }
137 av_free(var);
138 }
139 av_freep(&c->variants);
140 c->n_variants = 0;
141 }
142
143 /*
144 * Used to reset a statically allocated AVPacket to a clean slate,
145 * containing no data.
146 */
147 static void reset_packet(AVPacket *pkt)
148 {
149 av_init_packet(pkt);
150 pkt->data = NULL;
151 }
152
153 static struct variant *new_variant(AppleHTTPContext *c, int bandwidth,
154 const char *url, const char *base)
155 {
156 struct variant *var = av_mallocz(sizeof(struct variant));
157 if (!var)
158 return NULL;
159 reset_packet(&var->pkt);
160 var->bandwidth = bandwidth;
161 ff_make_absolute_url(var->url, sizeof(var->url), base, url);
162 dynarray_add(&c->variants, &c->n_variants, var);
163 return var;
164 }
165
166 struct variant_info {
167 char bandwidth[20];
168 };
169
170 static void handle_variant_args(struct variant_info *info, const char *key,
171 int key_len, char **dest, int *dest_len)
172 {
173 if (!strncmp(key, "BANDWIDTH=", key_len)) {
174 *dest = info->bandwidth;
175 *dest_len = sizeof(info->bandwidth);
176 }
177 }
178
179 struct key_info {
180 char uri[MAX_URL_SIZE];
181 char method[10];
182 char iv[35];
183 };
184
185 static void handle_key_args(struct key_info *info, const char *key,
186 int key_len, char **dest, int *dest_len)
187 {
188 if (!strncmp(key, "METHOD=", key_len)) {
189 *dest = info->method;
190 *dest_len = sizeof(info->method);
191 } else if (!strncmp(key, "URI=", key_len)) {
192 *dest = info->uri;
193 *dest_len = sizeof(info->uri);
194 } else if (!strncmp(key, "IV=", key_len)) {
195 *dest = info->iv;
196 *dest_len = sizeof(info->iv);
197 }
198 }
199
200 static int parse_playlist(AppleHTTPContext *c, const char *url,
201 struct variant *var, AVIOContext *in)
202 {
203 int ret = 0, duration = 0, is_segment = 0, is_variant = 0, bandwidth = 0;
204 enum KeyType key_type = KEY_NONE;
205 uint8_t iv[16] = "";
206 int has_iv = 0;
207 char key[MAX_URL_SIZE] = "";
208 char line[1024];
209 const char *ptr;
210 int close_in = 0;
211
212 if (!in) {
213 close_in = 1;
214 if ((ret = avio_open2(&in, url, AVIO_FLAG_READ,
215 c->interrupt_callback, NULL)) < 0)
216 return ret;
217 }
218
219 read_chomp_line(in, line, sizeof(line));
220 if (strcmp(line, "#EXTM3U")) {
221 ret = AVERROR_INVALIDDATA;
222 goto fail;
223 }
224
225 if (var) {
226 free_segment_list(var);
227 var->finished = 0;
228 }
229 while (!in->eof_reached) {
230 read_chomp_line(in, line, sizeof(line));
231 if (av_strstart(line, "#EXT-X-STREAM-INF:", &ptr)) {
232 struct variant_info info = {{0}};
233 is_variant = 1;
234 ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_variant_args,
235 &info);
236 bandwidth = atoi(info.bandwidth);
237 } else if (av_strstart(line, "#EXT-X-KEY:", &ptr)) {
238 struct key_info info = {{0}};
239 ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_key_args,
240 &info);
241 key_type = KEY_NONE;
242 has_iv = 0;
243 if (!strcmp(info.method, "AES-128"))
244 key_type = KEY_AES_128;
245 if (!strncmp(info.iv, "0x", 2) || !strncmp(info.iv, "0X", 2)) {
246 ff_hex_to_data(iv, info.iv + 2);
247 has_iv = 1;
248 }
249 av_strlcpy(key, info.uri, sizeof(key));
250 } else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
251 if (!var) {
252 var = new_variant(c, 0, url, NULL);
253 if (!var) {
254 ret = AVERROR(ENOMEM);
255 goto fail;
256 }
257 }
258 var->target_duration = atoi(ptr);
259 } else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
260 if (!var) {
261 var = new_variant(c, 0, url, NULL);
262 if (!var) {
263 ret = AVERROR(ENOMEM);
264 goto fail;
265 }
266 }
267 var->start_seq_no = atoi(ptr);
268 } else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
269 if (var)
270 var->finished = 1;
271 } else if (av_strstart(line, "#EXTINF:", &ptr)) {
272 is_segment = 1;
273 duration = atoi(ptr);
274 } else if (av_strstart(line, "#", NULL)) {
275 continue;
276 } else if (line[0]) {
277 if (is_variant) {
278 if (!new_variant(c, bandwidth, line, url)) {
279 ret = AVERROR(ENOMEM);
280 goto fail;
281 }
282 is_variant = 0;
283 bandwidth = 0;
284 }
285 if (is_segment) {
286 struct segment *seg;
287 if (!var) {
288 var = new_variant(c, 0, url, NULL);
289 if (!var) {
290 ret = AVERROR(ENOMEM);
291 goto fail;
292 }
293 }
294 seg = av_malloc(sizeof(struct segment));
295 if (!seg) {
296 ret = AVERROR(ENOMEM);
297 goto fail;
298 }
299 seg->duration = duration;
300 seg->key_type = key_type;
301 if (has_iv) {
302 memcpy(seg->iv, iv, sizeof(iv));
303 } else {
304 int seq = var->start_seq_no + var->n_segments;
305 memset(seg->iv, 0, sizeof(seg->iv));
306 AV_WB32(seg->iv + 12, seq);
307 }
308 ff_make_absolute_url(seg->key, sizeof(seg->key), url, key);
309 ff_make_absolute_url(seg->url, sizeof(seg->url), url, line);
310 dynarray_add(&var->segments, &var->n_segments, seg);
311 is_segment = 0;
312 }
313 }
314 }
315 if (var)
316 var->last_load_time = av_gettime();
317
318 fail:
319 if (close_in)
320 avio_close(in);
321 return ret;
322 }
323
324 static int open_input(struct variant *var)
325 {
326 struct segment *seg = var->segments[var->cur_seq_no - var->start_seq_no];
327 if (seg->key_type == KEY_NONE) {
328 return ffurl_open(&var->input, seg->url, AVIO_FLAG_READ,
329 &var->parent->interrupt_callback, NULL);
330 } else if (seg->key_type == KEY_AES_128) {
331 char iv[33], key[33], url[MAX_URL_SIZE];
332 int ret;
333 if (strcmp(seg->key, var->key_url)) {
334 URLContext *uc;
335 if (ffurl_open(&uc, seg->key, AVIO_FLAG_READ,
336 &var->parent->interrupt_callback, NULL) == 0) {
337 if (ffurl_read_complete(uc, var->key, sizeof(var->key))
338 != sizeof(var->key)) {
339 av_log(NULL, AV_LOG_ERROR, "Unable to read key file %s\n",
340 seg->key);
341 }
342 ffurl_close(uc);
343 } else {
344 av_log(NULL, AV_LOG_ERROR, "Unable to open key file %s\n",
345 seg->key);
346 }
347 av_strlcpy(var->key_url, seg->key, sizeof(var->key_url));
348 }
349 ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
350 ff_data_to_hex(key, var->key, sizeof(var->key), 0);
351 iv[32] = key[32] = '\0';
352 if (strstr(seg->url, "://"))
353 snprintf(url, sizeof(url), "crypto+%s", seg->url);
354 else
355 snprintf(url, sizeof(url), "crypto:%s", seg->url);
356 if ((ret = ffurl_alloc(&var->input, url, AVIO_FLAG_READ,
357 &var->parent->interrupt_callback)) < 0)
358 return ret;
359 av_opt_set(var->input->priv_data, "key", key, 0);
360 av_opt_set(var->input->priv_data, "iv", iv, 0);
361 if ((ret = ffurl_connect(var->input, NULL)) < 0) {
362 ffurl_close(var->input);
363 var->input = NULL;
364 return ret;
365 }
366 return 0;
367 }
368 return AVERROR(ENOSYS);
369 }
370
371 static int read_data(void *opaque, uint8_t *buf, int buf_size)
372 {
373 struct variant *v = opaque;
374 AppleHTTPContext *c = v->parent->priv_data;
375 int ret, i;
376
377 restart:
378 if (!v->input) {
379 /* If this is a live stream and the reload interval has elapsed since
380 * the last playlist reload, reload the variant playlists now. */
381 int64_t reload_interval = v->n_segments > 0 ?
382 v->segments[v->n_segments - 1]->duration :
383 v->target_duration;
384 reload_interval *= 1000000;
385
386 reload:
387 if (!v->finished &&
388 av_gettime() - v->last_load_time >= reload_interval) {
389 if ((ret = parse_playlist(c, v->url, v, NULL)) < 0)
390 return ret;
391 /* If we need to reload the playlist again below (if
392 * there's still no more segments), switch to a reload
393 * interval of half the target duration. */
394 reload_interval = v->target_duration * 500000;
395 }
396 if (v->cur_seq_no < v->start_seq_no) {
397 av_log(NULL, AV_LOG_WARNING,
398 "skipping %d segments ahead, expired from playlists\n",
399 v->start_seq_no - v->cur_seq_no);
400 v->cur_seq_no = v->start_seq_no;
401 }
402 if (v->cur_seq_no >= v->start_seq_no + v->n_segments) {
403 if (v->finished)
404 return AVERROR_EOF;
405 while (av_gettime() - v->last_load_time < reload_interval) {
406 if (ff_check_interrupt(c->interrupt_callback))
407 return AVERROR_EXIT;
408 usleep(100*1000);
409 }
410 /* Enough time has elapsed since the last reload */
411 goto reload;
412 }
413
414 ret = open_input(v);
415 if (ret < 0)
416 return ret;
417 }
418 ret = ffurl_read(v->input, buf, buf_size);
419 if (ret > 0)
420 return ret;
421 if (ret < 0 && ret != AVERROR_EOF)
422 return ret;
423 ffurl_close(v->input);
424 v->input = NULL;
425 v->cur_seq_no++;
426
427 c->end_of_segment = 1;
428 c->cur_seq_no = v->cur_seq_no;
429
430 if (v->ctx && v->ctx->nb_streams) {
431 v->needed = 0;
432 for (i = v->stream_offset; i < v->stream_offset + v->ctx->nb_streams;
433 i++) {
434 if (v->parent->streams[i]->discard < AVDISCARD_ALL)
435 v->needed = 1;
436 }
437 }
438 if (!v->needed) {
439 av_log(v->parent, AV_LOG_INFO, "No longer receiving variant %d\n",
440 v->index);
441 return AVERROR_EOF;
442 }
443 goto restart;
444 }
445
446 static int applehttp_read_header(AVFormatContext *s, AVFormatParameters *ap)
447 {
448 AppleHTTPContext *c = s->priv_data;
449 int ret = 0, i, j, stream_offset = 0;
450
451 c->interrupt_callback = &s->interrupt_callback;
452
453 if ((ret = parse_playlist(c, s->filename, NULL, s->pb)) < 0)
454 goto fail;
455
456 if (c->n_variants == 0) {
457 av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
458 ret = AVERROR_EOF;
459 goto fail;
460 }
461 /* If the playlist only contained variants, parse each individual
462 * variant playlist. */
463 if (c->n_variants > 1 || c->variants[0]->n_segments == 0) {
464 for (i = 0; i < c->n_variants; i++) {
465 struct variant *v = c->variants[i];
466 if ((ret = parse_playlist(c, v->url, v, NULL)) < 0)
467 goto fail;
468 }
469 }
470
471 if (c->variants[0]->n_segments == 0) {
472 av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
473 ret = AVERROR_EOF;
474 goto fail;
475 }
476
477 /* If this isn't a live stream, calculate the total duration of the
478 * stream. */
479 if (c->variants[0]->finished) {
480 int64_t duration = 0;
481 for (i = 0; i < c->variants[0]->n_segments; i++)
482 duration += c->variants[0]->segments[i]->duration;
483 s->duration = duration * AV_TIME_BASE;
484 }
485
486 /* Open the demuxer for each variant */
487 for (i = 0; i < c->n_variants; i++) {
488 struct variant *v = c->variants[i];
489 AVInputFormat *in_fmt = NULL;
490 char bitrate_str[20];
491 if (v->n_segments == 0)
492 continue;
493
494 if (!(v->ctx = avformat_alloc_context())) {
495 ret = AVERROR(ENOMEM);
496 goto fail;
497 }
498
499 v->index = i;
500 v->needed = 1;
501 v->parent = s;
502
503 /* If this is a live stream with more than 3 segments, start at the
504 * third last segment. */
505 v->cur_seq_no = v->start_seq_no;
506 if (!v->finished && v->n_segments > 3)
507 v->cur_seq_no = v->start_seq_no + v->n_segments - 3;
508
509 v->read_buffer = av_malloc(INITIAL_BUFFER_SIZE);
510 ffio_init_context(&v->pb, v->read_buffer, INITIAL_BUFFER_SIZE, 0, v,
511 read_data, NULL, NULL);
512 v->pb.seekable = 0;
513 ret = av_probe_input_buffer(&v->pb, &in_fmt, v->segments[0]->url,
514 NULL, 0, 0);
515 if (ret < 0) {
516 /* Free the ctx - it isn't initialized properly at this point,
517 * so avformat_close_input shouldn't be called. If
518 * avformat_open_input fails below, it frees and zeros the
519 * context, so it doesn't need any special treatment like this. */
520 avformat_free_context(v->ctx);
521 v->ctx = NULL;
522 goto fail;
523 }
524 v->ctx->pb = &v->pb;
525 ret = avformat_open_input(&v->ctx, v->segments[0]->url, in_fmt, NULL);
526 if (ret < 0)
527 goto fail;
528 v->stream_offset = stream_offset;
529 snprintf(bitrate_str, sizeof(bitrate_str), "%d", v->bandwidth);
530 /* Create new AVStreams for each stream in this variant */
531 for (j = 0; j < v->ctx->nb_streams; j++) {
532 AVStream *st = avformat_new_stream(s, NULL);
533 if (!st) {
534 ret = AVERROR(ENOMEM);
535 goto fail;
536 }
537 st->id = i;
538 avcodec_copy_context(st->codec, v->ctx->streams[j]->codec);
539 if (v->bandwidth)
540 av_dict_set(&st->metadata, "variant_bitrate", bitrate_str,
541 0);
542 }
543 stream_offset += v->ctx->nb_streams;
544 }
545
546 c->first_packet = 1;
547 c->first_timestamp = AV_NOPTS_VALUE;
548
549 return 0;
550 fail:
551 free_variant_list(c);
552 return ret;
553 }
554
555 static int recheck_discard_flags(AVFormatContext *s, int first)
556 {
557 AppleHTTPContext *c = s->priv_data;
558 int i, changed = 0;
559
560 /* Check if any new streams are needed */
561 for (i = 0; i < c->n_variants; i++)
562 c->variants[i]->cur_needed = 0;;
563
564 for (i = 0; i < s->nb_streams; i++) {
565 AVStream *st = s->streams[i];
566 struct variant *var = c->variants[s->streams[i]->id];
567 if (st->discard < AVDISCARD_ALL)
568 var->cur_needed = 1;
569 }
570 for (i = 0; i < c->n_variants; i++) {
571 struct variant *v = c->variants[i];
572 if (v->cur_needed && !v->needed) {
573 v->needed = 1;
574 changed = 1;
575 v->cur_seq_no = c->cur_seq_no;
576 v->pb.eof_reached = 0;
577 av_log(s, AV_LOG_INFO, "Now receiving variant %d\n", i);
578 } else if (first && !v->cur_needed && v->needed) {
579 if (v->input)
580 ffurl_close(v->input);
581 v->input = NULL;
582 v->needed = 0;
583 changed = 1;
584 av_log(s, AV_LOG_INFO, "No longer receiving variant %d\n", i);
585 }
586 }
587 return changed;
588 }
589
590 static int applehttp_read_packet(AVFormatContext *s, AVPacket *pkt)
591 {
592 AppleHTTPContext *c = s->priv_data;
593 int ret, i, minvariant = -1;
594
595 if (c->first_packet) {
596 recheck_discard_flags(s, 1);
597 c->first_packet = 0;
598 }
599
600 start:
601 c->end_of_segment = 0;
602 for (i = 0; i < c->n_variants; i++) {
603 struct variant *var = c->variants[i];
604 /* Make sure we've got one buffered packet from each open variant
605 * stream */
606 if (var->needed && !var->pkt.data) {
607 ret = av_read_frame(var->ctx, &var->pkt);
608 if (ret < 0) {
609 if (!var->pb.eof_reached)
610 return ret;
611 reset_packet(&var->pkt);
612 } else {
613 if (c->first_timestamp == AV_NOPTS_VALUE)
614 c->first_timestamp = var->pkt.dts;
615 }
616 }
617 /* Check if this stream has the packet with the lowest dts */
618 if (var->pkt.data) {
619 if (minvariant < 0 ||
620 var->pkt.dts < c->variants[minvariant]->pkt.dts)
621 minvariant = i;
622 }
623 }
624 if (c->end_of_segment) {
625 if (recheck_discard_flags(s, 0))
626 goto start;
627 }
628 /* If we got a packet, return it */
629 if (minvariant >= 0) {
630 *pkt = c->variants[minvariant]->pkt;
631 pkt->stream_index += c->variants[minvariant]->stream_offset;
632 reset_packet(&c->variants[minvariant]->pkt);
633 return 0;
634 }
635 return AVERROR_EOF;
636 }
637
638 static int applehttp_close(AVFormatContext *s)
639 {
640 AppleHTTPContext *c = s->priv_data;
641
642 free_variant_list(c);
643 return 0;
644 }
645
646 static int applehttp_read_seek(AVFormatContext *s, int stream_index,
647 int64_t timestamp, int flags)
648 {
649 AppleHTTPContext *c = s->priv_data;
650 int i, j, ret;
651
652 if ((flags & AVSEEK_FLAG_BYTE) || !c->variants[0]->finished)
653 return AVERROR(ENOSYS);
654
655 timestamp = av_rescale_rnd(timestamp, 1, stream_index >= 0 ?
656 s->streams[stream_index]->time_base.den :
657 AV_TIME_BASE, flags & AVSEEK_FLAG_BACKWARD ?
658 AV_ROUND_DOWN : AV_ROUND_UP);
659 ret = AVERROR(EIO);
660 for (i = 0; i < c->n_variants; i++) {
661 /* Reset reading */
662 struct variant *var = c->variants[i];
663 int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ? 0 :
664 av_rescale_rnd(c->first_timestamp, 1,
665 stream_index >= 0 ? s->streams[stream_index]->time_base.den : AV_TIME_BASE,
666 flags & AVSEEK_FLAG_BACKWARD ? AV_ROUND_DOWN : AV_ROUND_UP);
667 if (var->input) {
668 ffurl_close(var->input);
669 var->input = NULL;
670 }
671 av_free_packet(&var->pkt);
672 reset_packet(&var->pkt);
673 var->pb.eof_reached = 0;
674
675 /* Locate the segment that contains the target timestamp */
676 for (j = 0; j < var->n_segments; j++) {
677 if (timestamp >= pos &&
678 timestamp < pos + var->segments[j]->duration) {
679 var->cur_seq_no = var->start_seq_no + j;
680 ret = 0;
681 break;
682 }
683 pos += var->segments[j]->duration;
684 }
685 }
686 return ret;
687 }
688
689 static int applehttp_probe(AVProbeData *p)
690 {
691 /* Require #EXTM3U at the start, and either one of the ones below
692 * somewhere for a proper match. */
693 if (strncmp(p->buf, "#EXTM3U", 7))
694 return 0;
695 if (strstr(p->buf, "#EXT-X-STREAM-INF:") ||
696 strstr(p->buf, "#EXT-X-TARGETDURATION:") ||
697 strstr(p->buf, "#EXT-X-MEDIA-SEQUENCE:"))
698 return AVPROBE_SCORE_MAX;
699 return 0;
700 }
701
702 AVInputFormat ff_applehttp_demuxer = {
703 .name = "applehttp",
704 .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming format"),
705 .priv_data_size = sizeof(AppleHTTPContext),
706 .read_probe = applehttp_probe,
707 .read_header = applehttp_read_header,
708 .read_packet = applehttp_read_packet,
709 .read_close = applehttp_close,
710 .read_seek = applehttp_read_seek,
711 };