FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/hls.c
Date: 2024-11-20 23:03:26
Exec Total Coverage
Lines: 565 1368 41.3%
Functions: 32 48 66.7%
Branches: 296 970 30.5%
Line Branch Exec Source
1 /*
2 * Apple HTTP Live Streaming demuxer
3 * Copyright (c) 2010 Martin Storsjo
4 * Copyright (c) 2013 Anssi Hannula
5 * Copyright (c) 2021 Nachiket Tarate
6 *
7 * This file is part of FFmpeg.
8 *
9 * FFmpeg is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
13 *
14 * FFmpeg is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with FFmpeg; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24 /**
25 * @file
26 * Apple HTTP Live Streaming demuxer
27 * https://www.rfc-editor.org/rfc/rfc8216.txt
28 */
29
30 #include "config_components.h"
31
32 #include "libavformat/http.h"
33 #include "libavutil/aes.h"
34 #include "libavutil/avstring.h"
35 #include "libavutil/avassert.h"
36 #include "libavutil/intreadwrite.h"
37 #include "libavutil/mathematics.h"
38 #include "libavutil/mem.h"
39 #include "libavutil/opt.h"
40 #include "libavutil/dict.h"
41 #include "libavutil/time.h"
42 #include "avformat.h"
43 #include "demux.h"
44 #include "internal.h"
45 #include "avio_internal.h"
46 #include "id3v2.h"
47 #include "url.h"
48
49 #include "hls_sample_encryption.h"
50
51 #define INITIAL_BUFFER_SIZE 32768
52
53 #define MAX_FIELD_LEN 64
54 #define MAX_CHARACTERISTICS_LEN 512
55
56 #define MPEG_TIME_BASE 90000
57 #define MPEG_TIME_BASE_Q (AVRational){1, MPEG_TIME_BASE}
58
59 /*
60 * An apple http stream consists of a playlist with media segment files,
61 * played sequentially. There may be several playlists with the same
62 * video content, in different bandwidth variants, that are played in
63 * parallel (preferably only one bandwidth variant at a time). In this case,
64 * the user supplied the url to a main playlist that only lists the variant
65 * playlists.
66 *
67 * If the main playlist doesn't point at any variants, we still create
68 * one anonymous toplevel variant for this, to maintain the structure.
69 */
70
71 enum KeyType {
72 KEY_NONE,
73 KEY_AES_128,
74 KEY_SAMPLE_AES
75 };
76
77 struct segment {
78 int64_t duration;
79 int64_t url_offset;
80 int64_t size;
81 char *url;
82 char *key;
83 enum KeyType key_type;
84 uint8_t iv[16];
85 /* associated Media Initialization Section, treated as a segment */
86 struct segment *init_section;
87 };
88
89 struct rendition;
90
91 enum PlaylistType {
92 PLS_TYPE_UNSPECIFIED,
93 PLS_TYPE_EVENT,
94 PLS_TYPE_VOD
95 };
96
97 /*
98 * Each playlist has its own demuxer. If it currently is active,
99 * it has an open AVIOContext too, and potentially an AVPacket
100 * containing the next packet from this stream.
101 */
102 struct playlist {
103 char url[MAX_URL_SIZE];
104 FFIOContext pb;
105 uint8_t* read_buffer;
106 AVIOContext *input;
107 int input_read_done;
108 AVIOContext *input_next;
109 int input_next_requested;
110 AVFormatContext *parent;
111 int index;
112 AVFormatContext *ctx;
113 AVPacket *pkt;
114 int has_noheader_flag;
115
116 /* main demuxer streams associated with this playlist
117 * indexed by the subdemuxer stream indexes */
118 AVStream **main_streams;
119 int n_main_streams;
120
121 int finished;
122 enum PlaylistType type;
123 int64_t target_duration;
124 int64_t start_seq_no;
125 int time_offset_flag;
126 int64_t start_time_offset;
127 int n_segments;
128 struct segment **segments;
129 int needed;
130 int broken;
131 int64_t cur_seq_no;
132 int64_t last_seq_no;
133 int m3u8_hold_counters;
134 int64_t cur_seg_offset;
135 int64_t last_load_time;
136
137 /* Currently active Media Initialization Section */
138 struct segment *cur_init_section;
139 uint8_t *init_sec_buf;
140 unsigned int init_sec_buf_size;
141 unsigned int init_sec_data_len;
142 unsigned int init_sec_buf_read_offset;
143
144 char key_url[MAX_URL_SIZE];
145 uint8_t key[16];
146
147 /* ID3 timestamp handling (elementary audio streams have ID3 timestamps
148 * (and possibly other ID3 tags) in the beginning of each segment) */
149 int is_id3_timestamped; /* -1: not yet known */
150 int64_t id3_mpegts_timestamp; /* in mpegts tb */
151 int64_t id3_offset; /* in stream original tb */
152 uint8_t* id3_buf; /* temp buffer for id3 parsing */
153 unsigned int id3_buf_size;
154 AVDictionary *id3_initial; /* data from first id3 tag */
155 int id3_found; /* ID3 tag found at some point */
156 int id3_changed; /* ID3 tag data has changed at some point */
157 ID3v2ExtraMeta *id3_deferred_extra; /* stored here until subdemuxer is opened */
158
159 HLSAudioSetupInfo audio_setup_info;
160
161 int64_t seek_timestamp;
162 int seek_flags;
163 int seek_stream_index; /* into subdemuxer stream array */
164
165 /* Renditions associated with this playlist, if any.
166 * Alternative rendition playlists have a single rendition associated
167 * with them, and variant main Media Playlists may have
168 * multiple (playlist-less) renditions associated with them. */
169 int n_renditions;
170 struct rendition **renditions;
171
172 /* Media Initialization Sections (EXT-X-MAP) associated with this
173 * playlist, if any. */
174 int n_init_sections;
175 struct segment **init_sections;
176 };
177
178 /*
179 * Renditions are e.g. alternative subtitle or audio streams.
180 * The rendition may either be an external playlist or it may be
181 * contained in the main Media Playlist of the variant (in which case
182 * playlist is NULL).
183 */
184 struct rendition {
185 enum AVMediaType type;
186 struct playlist *playlist;
187 char group_id[MAX_FIELD_LEN];
188 char language[MAX_FIELD_LEN];
189 char name[MAX_FIELD_LEN];
190 int disposition;
191 };
192
193 struct variant {
194 int bandwidth;
195
196 /* every variant contains at least the main Media Playlist in index 0 */
197 int n_playlists;
198 struct playlist **playlists;
199
200 char audio_group[MAX_FIELD_LEN];
201 char video_group[MAX_FIELD_LEN];
202 char subtitles_group[MAX_FIELD_LEN];
203 };
204
205 typedef struct HLSContext {
206 AVClass *class;
207 AVFormatContext *ctx;
208 int n_variants;
209 struct variant **variants;
210 int n_playlists;
211 struct playlist **playlists;
212 int n_renditions;
213 struct rendition **renditions;
214
215 int64_t cur_seq_no;
216 int m3u8_hold_counters;
217 int live_start_index;
218 int prefer_x_start;
219 int first_packet;
220 int64_t first_timestamp;
221 int64_t cur_timestamp;
222 AVIOInterruptCB *interrupt_callback;
223 AVDictionary *avio_opts;
224 AVDictionary *seg_format_opts;
225 char *allowed_extensions;
226 int max_reload;
227 int http_persistent;
228 int http_multiple;
229 int http_seekable;
230 int seg_max_retry;
231 AVIOContext *playlist_pb;
232 HLSCryptoContext crypto_ctx;
233 } HLSContext;
234
235 12 static void free_segment_dynarray(struct segment **segments, int n_segments)
236 {
237 int i;
238
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 77 for (i = 0; i < n_segments; i++) {
239 65 av_freep(&segments[i]->key);
240 65 av_freep(&segments[i]->url);
241 65 av_freep(&segments[i]);
242 }
243 12 }
244
245 12 static void free_segment_list(struct playlist *pls)
246 {
247 12 free_segment_dynarray(pls->segments, pls->n_segments);
248 12 av_freep(&pls->segments);
249 12 pls->n_segments = 0;
250 12 }
251
252 12 static void free_init_section_list(struct playlist *pls)
253 {
254 int i;
255
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 12 for (i = 0; i < pls->n_init_sections; i++) {
256 ✗ av_freep(&pls->init_sections[i]->key);
257 ✗ av_freep(&pls->init_sections[i]->url);
258 ✗ av_freep(&pls->init_sections[i]);
259 }
260 12 av_freep(&pls->init_sections);
261 12 pls->n_init_sections = 0;
262 12 }
263
264 12 static void free_playlist_list(HLSContext *c)
265 {
266 int i;
267
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 24 for (i = 0; i < c->n_playlists; i++) {
268 12 struct playlist *pls = c->playlists[i];
269 12 free_segment_list(pls);
270 12 free_init_section_list(pls);
271 12 av_freep(&pls->main_streams);
272 12 av_freep(&pls->renditions);
273 12 av_freep(&pls->id3_buf);
274 12 av_dict_free(&pls->id3_initial);
275 12 ff_id3v2_free_extra_meta(&pls->id3_deferred_extra);
276 12 av_freep(&pls->init_sec_buf);
277 12 av_packet_free(&pls->pkt);
278 12 av_freep(&pls->pb.pub.buffer);
279 12 ff_format_io_close(c->ctx, &pls->input);
280 12 pls->input_read_done = 0;
281 12 ff_format_io_close(c->ctx, &pls->input_next);
282 12 pls->input_next_requested = 0;
283
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 12 if (pls->ctx) {
284 12 pls->ctx->pb = NULL;
285 12 avformat_close_input(&pls->ctx);
286 }
287 12 av_free(pls);
288 }
289 12 av_freep(&c->playlists);
290 12 c->n_playlists = 0;
291 12 }
292
293 12 static void free_variant_list(HLSContext *c)
294 {
295 int i;
296
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 24 for (i = 0; i < c->n_variants; i++) {
297 12 struct variant *var = c->variants[i];
298 12 av_freep(&var->playlists);
299 12 av_free(var);
300 }
301 12 av_freep(&c->variants);
302 12 c->n_variants = 0;
303 12 }
304
305 12 static void free_rendition_list(HLSContext *c)
306 {
307 int i;
308
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 12 for (i = 0; i < c->n_renditions; i++)
309 ✗ av_freep(&c->renditions[i]);
310 12 av_freep(&c->renditions);
311 12 c->n_renditions = 0;
312 12 }
313
314 12 static struct playlist *new_playlist(HLSContext *c, const char *url,
315 const char *base)
316 {
317 12 struct playlist *pls = av_mallocz(sizeof(struct playlist));
318
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 12 if (!pls)
319 ✗ return NULL;
320 12 pls->pkt = av_packet_alloc();
321
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 12 if (!pls->pkt) {
322 ✗ av_free(pls);
323 ✗ return NULL;
324 }
325 12 ff_make_absolute_url(pls->url, sizeof(pls->url), base, url);
326
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 12 if (!pls->url[0]) {
327 ✗ av_packet_free(&pls->pkt);
328 ✗ av_free(pls);
329 ✗ return NULL;
330 }
331 12 pls->seek_timestamp = AV_NOPTS_VALUE;
332
333 12 pls->is_id3_timestamped = -1;
334 12 pls->id3_mpegts_timestamp = AV_NOPTS_VALUE;
335
336 12 dynarray_add(&c->playlists, &c->n_playlists, pls);
337 12 return pls;
338 }
339
340 struct variant_info {
341 char bandwidth[20];
342 /* variant group ids: */
343 char audio[MAX_FIELD_LEN];
344 char video[MAX_FIELD_LEN];
345 char subtitles[MAX_FIELD_LEN];
346 };
347
348 12 static struct variant *new_variant(HLSContext *c, struct variant_info *info,
349 const char *url, const char *base)
350 {
351 struct variant *var;
352 struct playlist *pls;
353
354 12 pls = new_playlist(c, url, base);
355
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 12 if (!pls)
356 ✗ return NULL;
357
358 12 var = av_mallocz(sizeof(struct variant));
359
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 12 if (!var)
360 ✗ return NULL;
361
362
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 12 if (info) {
363 ✗ var->bandwidth = atoi(info->bandwidth);
364 ✗ strcpy(var->audio_group, info->audio);
365 ✗ strcpy(var->video_group, info->video);
366 ✗ strcpy(var->subtitles_group, info->subtitles);
367 }
368
369 12 dynarray_add(&c->variants, &c->n_variants, var);
370 12 dynarray_add(&var->playlists, &var->n_playlists, pls);
371 12 return var;
372 }
373
374 ✗ static void handle_variant_args(struct variant_info *info, const char *key,
375 int key_len, char **dest, int *dest_len)
376 {
377 ✗ if (!strncmp(key, "BANDWIDTH=", key_len)) {
378 ✗ *dest = info->bandwidth;
379 ✗ *dest_len = sizeof(info->bandwidth);
380 ✗ } else if (!strncmp(key, "AUDIO=", key_len)) {
381 ✗ *dest = info->audio;
382 ✗ *dest_len = sizeof(info->audio);
383 ✗ } else if (!strncmp(key, "VIDEO=", key_len)) {
384 ✗ *dest = info->video;
385 ✗ *dest_len = sizeof(info->video);
386 ✗ } else if (!strncmp(key, "SUBTITLES=", key_len)) {
387 ✗ *dest = info->subtitles;
388 ✗ *dest_len = sizeof(info->subtitles);
389 }
390 ✗ }
391
392 struct key_info {
393 char uri[MAX_URL_SIZE];
394 char method[11];
395 char iv[35];
396 };
397
398 ✗ static void handle_key_args(struct key_info *info, const char *key,
399 int key_len, char **dest, int *dest_len)
400 {
401 ✗ if (!strncmp(key, "METHOD=", key_len)) {
402 ✗ *dest = info->method;
403 ✗ *dest_len = sizeof(info->method);
404 ✗ } else if (!strncmp(key, "URI=", key_len)) {
405 ✗ *dest = info->uri;
406 ✗ *dest_len = sizeof(info->uri);
407 ✗ } else if (!strncmp(key, "IV=", key_len)) {
408 ✗ *dest = info->iv;
409 ✗ *dest_len = sizeof(info->iv);
410 }
411 ✗ }
412
413 struct init_section_info {
414 char uri[MAX_URL_SIZE];
415 char byterange[32];
416 };
417
418 ✗ static struct segment *new_init_section(struct playlist *pls,
419 struct init_section_info *info,
420 const char *url_base)
421 {
422 struct segment *sec;
423 ✗ char tmp_str[MAX_URL_SIZE], *ptr = tmp_str;
424
425 ✗ if (!info->uri[0])
426 ✗ return NULL;
427
428 ✗ sec = av_mallocz(sizeof(*sec));
429 ✗ if (!sec)
430 ✗ return NULL;
431
432 ✗ if (!av_strncasecmp(info->uri, "data:", 5)) {
433 ✗ ptr = info->uri;
434 } else {
435 ✗ ff_make_absolute_url(tmp_str, sizeof(tmp_str), url_base, info->uri);
436 ✗ if (!tmp_str[0]) {
437 ✗ av_free(sec);
438 ✗ return NULL;
439 }
440 }
441 ✗ sec->url = av_strdup(ptr);
442 ✗ if (!sec->url) {
443 ✗ av_free(sec);
444 ✗ return NULL;
445 }
446
447 ✗ if (info->byterange[0]) {
448 ✗ sec->size = strtoll(info->byterange, NULL, 10);
449 ✗ ptr = strchr(info->byterange, '@');
450 ✗ if (ptr)
451 ✗ sec->url_offset = strtoll(ptr+1, NULL, 10);
452 } else {
453 /* the entire file is the init section */
454 ✗ sec->size = -1;
455 }
456
457 ✗ dynarray_add(&pls->init_sections, &pls->n_init_sections, sec);
458
459 ✗ return sec;
460 }
461
462 ✗ static void handle_init_section_args(struct init_section_info *info, const char *key,
463 int key_len, char **dest, int *dest_len)
464 {
465 ✗ if (!strncmp(key, "URI=", key_len)) {
466 ✗ *dest = info->uri;
467 ✗ *dest_len = sizeof(info->uri);
468 ✗ } else if (!strncmp(key, "BYTERANGE=", key_len)) {
469 ✗ *dest = info->byterange;
470 ✗ *dest_len = sizeof(info->byterange);
471 }
472 ✗ }
473
474 struct rendition_info {
475 char type[16];
476 char uri[MAX_URL_SIZE];
477 char group_id[MAX_FIELD_LEN];
478 char language[MAX_FIELD_LEN];
479 char assoc_language[MAX_FIELD_LEN];
480 char name[MAX_FIELD_LEN];
481 char defaultr[4];
482 char forced[4];
483 char characteristics[MAX_CHARACTERISTICS_LEN];
484 };
485
486 ✗ static struct rendition *new_rendition(HLSContext *c, struct rendition_info *info,
487 const char *url_base)
488 {
489 struct rendition *rend;
490 ✗ enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
491 char *characteristic;
492 char *chr_ptr;
493 char *saveptr;
494
495 ✗ if (!strcmp(info->type, "AUDIO"))
496 ✗ type = AVMEDIA_TYPE_AUDIO;
497 ✗ else if (!strcmp(info->type, "VIDEO"))
498 ✗ type = AVMEDIA_TYPE_VIDEO;
499 ✗ else if (!strcmp(info->type, "SUBTITLES"))
500 ✗ type = AVMEDIA_TYPE_SUBTITLE;
501 ✗ else if (!strcmp(info->type, "CLOSED-CAPTIONS"))
502 /* CLOSED-CAPTIONS is ignored since we do not support CEA-608 CC in
503 * AVC SEI RBSP anyway */
504 ✗ return NULL;
505
506 ✗ if (type == AVMEDIA_TYPE_UNKNOWN) {
507 ✗ av_log(c->ctx, AV_LOG_WARNING, "Can't support the type: %s\n", info->type);
508 ✗ return NULL;
509 }
510
511 /* URI is mandatory for subtitles as per spec */
512 ✗ if (type == AVMEDIA_TYPE_SUBTITLE && !info->uri[0]) {
513 ✗ av_log(c->ctx, AV_LOG_ERROR, "The URI tag is REQUIRED for subtitle.\n");
514 ✗ return NULL;
515 }
516
517 /* TODO: handle subtitles (each segment has to parsed separately) */
518 ✗ if (c->ctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL)
519 ✗ if (type == AVMEDIA_TYPE_SUBTITLE) {
520 ✗ av_log(c->ctx, AV_LOG_WARNING, "Can't support the subtitle(uri: %s)\n", info->uri);
521 ✗ return NULL;
522 }
523
524 ✗ rend = av_mallocz(sizeof(struct rendition));
525 ✗ if (!rend)
526 ✗ return NULL;
527
528 ✗ dynarray_add(&c->renditions, &c->n_renditions, rend);
529
530 ✗ rend->type = type;
531 ✗ strcpy(rend->group_id, info->group_id);
532 ✗ strcpy(rend->language, info->language);
533 ✗ strcpy(rend->name, info->name);
534
535 /* add the playlist if this is an external rendition */
536 ✗ if (info->uri[0]) {
537 ✗ rend->playlist = new_playlist(c, info->uri, url_base);
538 ✗ if (rend->playlist)
539 ✗ dynarray_add(&rend->playlist->renditions,
540 &rend->playlist->n_renditions, rend);
541 }
542
543 ✗ if (info->assoc_language[0]) {
544 ✗ size_t langlen = strlen(rend->language);
545 ✗ if (langlen < sizeof(rend->language) - 3) {
546 size_t assoc_len;
547 ✗ rend->language[langlen] = ',';
548 ✗ assoc_len = av_strlcpy(rend->language + langlen + 1,
549 ✗ info->assoc_language,
550 sizeof(rend->language) - langlen - 1);
551 ✗ if (langlen + assoc_len + 2 > sizeof(rend->language)) // truncation occurred
552 ✗ av_log(c->ctx, AV_LOG_WARNING, "Truncated rendition language: %s\n",
553 ✗ info->assoc_language);
554 }
555 }
556
557 ✗ if (!strcmp(info->defaultr, "YES"))
558 ✗ rend->disposition |= AV_DISPOSITION_DEFAULT;
559 ✗ if (!strcmp(info->forced, "YES"))
560 ✗ rend->disposition |= AV_DISPOSITION_FORCED;
561
562 ✗ chr_ptr = info->characteristics;
563 ✗ while ((characteristic = av_strtok(chr_ptr, ",", &saveptr))) {
564 ✗ if (!strcmp(characteristic, "public.accessibility.describes-music-and-sound"))
565 ✗ rend->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
566 ✗ else if (!strcmp(characteristic, "public.accessibility.describes-video"))
567 ✗ rend->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
568
569 ✗ chr_ptr = NULL;
570 }
571
572 ✗ return rend;
573 }
574
575 ✗ static void handle_rendition_args(struct rendition_info *info, const char *key,
576 int key_len, char **dest, int *dest_len)
577 {
578 ✗ if (!strncmp(key, "TYPE=", key_len)) {
579 ✗ *dest = info->type;
580 ✗ *dest_len = sizeof(info->type);
581 ✗ } else if (!strncmp(key, "URI=", key_len)) {
582 ✗ *dest = info->uri;
583 ✗ *dest_len = sizeof(info->uri);
584 ✗ } else if (!strncmp(key, "GROUP-ID=", key_len)) {
585 ✗ *dest = info->group_id;
586 ✗ *dest_len = sizeof(info->group_id);
587 ✗ } else if (!strncmp(key, "LANGUAGE=", key_len)) {
588 ✗ *dest = info->language;
589 ✗ *dest_len = sizeof(info->language);
590 ✗ } else if (!strncmp(key, "ASSOC-LANGUAGE=", key_len)) {
591 ✗ *dest = info->assoc_language;
592 ✗ *dest_len = sizeof(info->assoc_language);
593 ✗ } else if (!strncmp(key, "NAME=", key_len)) {
594 ✗ *dest = info->name;
595 ✗ *dest_len = sizeof(info->name);
596 ✗ } else if (!strncmp(key, "DEFAULT=", key_len)) {
597 ✗ *dest = info->defaultr;
598 ✗ *dest_len = sizeof(info->defaultr);
599 ✗ } else if (!strncmp(key, "FORCED=", key_len)) {
600 ✗ *dest = info->forced;
601 ✗ *dest_len = sizeof(info->forced);
602 ✗ } else if (!strncmp(key, "CHARACTERISTICS=", key_len)) {
603 ✗ *dest = info->characteristics;
604 ✗ *dest_len = sizeof(info->characteristics);
605 }
606 /*
607 * ignored:
608 * - AUTOSELECT: client may autoselect based on e.g. system language
609 * - INSTREAM-ID: EIA-608 closed caption number ("CC1".."CC4")
610 */
611 ✗ }
612
613 /* used by parse_playlist to allocate a new variant+playlist when the
614 * playlist is detected to be a Media Playlist (not Master Playlist)
615 * and we have no parent Master Playlist (parsing of which would have
616 * allocated the variant and playlist already)
617 * *pls == NULL => Master Playlist or parentless Media Playlist
618 * *pls != NULL => parented Media Playlist, playlist+variant allocated */
619 89 static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
620 {
621
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 89 if (*pls)
622 77 return 0;
623
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 12 if (!new_variant(c, NULL, url, NULL))
624 ✗ return AVERROR(ENOMEM);
625 12 *pls = c->playlists[c->n_playlists - 1];
626 12 return 0;
627 }
628
629 ✗ static int open_url_keepalive(AVFormatContext *s, AVIOContext **pb,
630 const char *url, AVDictionary **options)
631 {
632 #if !CONFIG_HTTP_PROTOCOL
633 return AVERROR_PROTOCOL_NOT_FOUND;
634 #else
635 int ret;
636 ✗ URLContext *uc = ffio_geturlcontext(*pb);
637 ✗ av_assert0(uc);
638 ✗ (*pb)->eof_reached = 0;
639 ✗ ret = ff_http_do_new_request2(uc, url, options);
640 ✗ if (ret < 0) {
641 ✗ ff_format_io_close(s, pb);
642 }
643 ✗ return ret;
644 #endif
645 }
646
647 61 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
648 AVDictionary **opts, AVDictionary *opts2, int *is_http_out)
649 {
650 61 HLSContext *c = s->priv_data;
651 61 AVDictionary *tmp = NULL;
652 61 const char *proto_name = NULL;
653 int ret;
654 61 int is_http = 0;
655
656
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 61 if (av_strstart(url, "crypto", NULL)) {
657 ✗ if (url[6] == '+' || url[6] == ':')
658 ✗ proto_name = avio_find_protocol_name(url + 7);
659
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 61 } else if (av_strstart(url, "data", NULL)) {
660 ✗ if (url[4] == '+' || url[4] == ':')
661 ✗ proto_name = avio_find_protocol_name(url + 5);
662 }
663
664
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 61 if (!proto_name)
665 61 proto_name = avio_find_protocol_name(url);
666
667
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 61 if (!proto_name)
668 ✗ return AVERROR_INVALIDDATA;
669
670 // only http(s) & file are allowed
671
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 61 if (av_strstart(proto_name, "file", NULL)) {
672
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 61 if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
673 ✗ av_log(s, AV_LOG_ERROR,
674 "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
675 "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
676 url);
677 ✗ return AVERROR_INVALIDDATA;
678 }
679 ✗ } else if (av_strstart(proto_name, "http", NULL)) {
680 ✗ is_http = 1;
681 ✗ } else if (av_strstart(proto_name, "data", NULL)) {
682 ;
683 } else
684 ✗ return AVERROR_INVALIDDATA;
685
686
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 61 if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
687 ;
688
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 61 else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
689 ;
690
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 61 else if (av_strstart(url, "data", NULL) && !strncmp(proto_name, url + 5, strlen(proto_name)) && url[5 + strlen(proto_name)] == ':')
691 ;
692
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 61 else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
693 ✗ return AVERROR_INVALIDDATA;
694
695 61 av_dict_copy(&tmp, *opts, 0);
696 61 av_dict_copy(&tmp, opts2, 0);
697
698
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 61 if (is_http && c->http_persistent && *pb) {
699 ✗ ret = open_url_keepalive(c->ctx, pb, url, &tmp);
700 ✗ if (ret == AVERROR_EXIT) {
701 ✗ av_dict_free(&tmp);
702 ✗ return ret;
703 ✗ } else if (ret < 0) {
704 ✗ if (ret != AVERROR_EOF)
705 ✗ av_log(s, AV_LOG_WARNING,
706 "keepalive request failed for '%s' with error: '%s' when opening url, retrying with new connection\n",
707 ✗ url, av_err2str(ret));
708 ✗ av_dict_copy(&tmp, *opts, 0);
709 ✗ av_dict_copy(&tmp, opts2, 0);
710 ✗ ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
711 }
712 } else {
713 61 ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
714 }
715
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 61 if (ret >= 0) {
716 // update cookies on http response with setcookies.
717 61 char *new_cookies = NULL;
718
719
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 61 if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
720 61 av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
721
722
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 61 if (new_cookies)
723 ✗ av_dict_set(opts, "cookies", new_cookies, AV_DICT_DONT_STRDUP_VAL);
724 }
725
726 61 av_dict_free(&tmp);
727
728
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 61 if (is_http_out)
729 61 *is_http_out = is_http;
730
731 61 return ret;
732 }
733
734 12 static int parse_playlist(HLSContext *c, const char *url,
735 struct playlist *pls, AVIOContext *in)
736 {
737 12 int ret = 0, is_segment = 0, is_variant = 0;
738 12 int64_t duration = 0;
739 12 enum KeyType key_type = KEY_NONE;
740 12 uint8_t iv[16] = "";
741 12 int has_iv = 0;
742 12 char key[MAX_URL_SIZE] = "";
743 char line[MAX_URL_SIZE];
744 const char *ptr;
745 12 int close_in = 0;
746 12 int64_t seg_offset = 0;
747 12 int64_t seg_size = -1;
748 12 uint8_t *new_url = NULL;
749 struct variant_info variant_info;
750 char tmp_str[MAX_URL_SIZE];
751 12 struct segment *cur_init_section = NULL;
752 12 int is_http = av_strstart(url, "http", NULL);
753 12 struct segment **prev_segments = NULL;
754 12 int prev_n_segments = 0;
755 12 int64_t prev_start_seq_no = -1;
756
757
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 12 if (is_http && !in && c->http_persistent && c->playlist_pb) {
758 ✗ in = c->playlist_pb;
759 ✗ ret = open_url_keepalive(c->ctx, &c->playlist_pb, url, NULL);
760 ✗ if (ret == AVERROR_EXIT) {
761 ✗ return ret;
762 ✗ } else if (ret < 0) {
763 ✗ if (ret != AVERROR_EOF)
764 ✗ av_log(c->ctx, AV_LOG_WARNING,
765 "keepalive request failed for '%s' with error: '%s' when parsing playlist\n",
766 ✗ url, av_err2str(ret));
767 ✗ in = NULL;
768 }
769 }
770
771
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 12 if (!in) {
772 ✗ AVDictionary *opts = NULL;
773 ✗ av_dict_copy(&opts, c->avio_opts, 0);
774
775 ✗ if (c->http_persistent)
776 ✗ av_dict_set(&opts, "multiple_requests", "1", 0);
777
778 ✗ ret = c->ctx->io_open(c->ctx, &in, url, AVIO_FLAG_READ, &opts);
779 ✗ av_dict_free(&opts);
780 ✗ if (ret < 0)
781 ✗ return ret;
782
783 ✗ if (is_http && c->http_persistent)
784 ✗ c->playlist_pb = in;
785 else
786 ✗ close_in = 1;
787 }
788
789
1/2
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✓ Branch 2 taken 12 times.
 12 if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0)
790 ✗ url = new_url;
791
792 12 ff_get_chomp_line(in, line, sizeof(line));
793
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 12 if (strcmp(line, "#EXTM3U")) {
794 ✗ ret = AVERROR_INVALIDDATA;
795 ✗ goto fail;
796 }
797
798
1/2
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 12 if (pls) {
799 ✗ prev_start_seq_no = pls->start_seq_no;
800 ✗ prev_segments = pls->segments;
801 ✗ prev_n_segments = pls->n_segments;
802 ✗ pls->segments = NULL;
803 ✗ pls->n_segments = 0;
804
805 ✗ pls->finished = 0;
806 ✗ pls->type = PLS_TYPE_UNSPECIFIED;
807 }
808
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 225 while (!avio_feof(in)) {
809 213 ff_get_chomp_line(in, line, sizeof(line));
810
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 213 if (av_strstart(line, "#EXT-X-STREAM-INF:", &ptr)) {
811 ✗ is_variant = 1;
812 ✗ memset(&variant_info, 0, sizeof(variant_info));
813 ✗ ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_variant_args,
814 &variant_info);
815
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 213 } else if (av_strstart(line, "#EXT-X-KEY:", &ptr)) {
816 ✗ struct key_info info = {{0}};
817 ✗ ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_key_args,
818 &info);
819 ✗ key_type = KEY_NONE;
820 ✗ has_iv = 0;
821 ✗ if (!strcmp(info.method, "AES-128"))
822 ✗ key_type = KEY_AES_128;
823 ✗ if (!strcmp(info.method, "SAMPLE-AES"))
824 ✗ key_type = KEY_SAMPLE_AES;
825 ✗ if (!av_strncasecmp(info.iv, "0x", 2)) {
826 ✗ ff_hex_to_data(iv, info.iv + 2);
827 ✗ has_iv = 1;
828 }
829 ✗ av_strlcpy(key, info.uri, sizeof(key));
830
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 213 } else if (av_strstart(line, "#EXT-X-MEDIA:", &ptr)) {
831 ✗ struct rendition_info info = {{0}};
832 ✗ ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_rendition_args,
833 &info);
834 ✗ new_rendition(c, &info, url);
835
2/2
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 213 } else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
836 int64_t t;
837 12 ret = ensure_playlist(c, &pls, url);
838
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 12 if (ret < 0)
839 ✗ goto fail;
840 12 t = strtoll(ptr, NULL, 10);
841
2/4
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✓ Branch 3 taken 12 times.
 12 if (t < 0 || t >= INT64_MAX / AV_TIME_BASE) {
842 ✗ ret = AVERROR_INVALIDDATA;
843 ✗ goto fail;
844 }
845 12 pls->target_duration = t * AV_TIME_BASE;
846
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 201 } else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
847 uint64_t seq_no;
848 12 ret = ensure_playlist(c, &pls, url);
849
1/2
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 12 if (ret < 0)
850 ✗ goto fail;
851 12 seq_no = strtoull(ptr, NULL, 10);
852
1/2
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 12 if (seq_no > INT64_MAX/2) {
853 ✗ av_log(c->ctx, AV_LOG_DEBUG, "MEDIA-SEQUENCE higher than "
854 "INT64_MAX/2, mask out the highest bit\n");
855 ✗ seq_no &= INT64_MAX/2;
856 }
857 12 pls->start_seq_no = seq_no;
858
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 189 } else if (av_strstart(line, "#EXT-X-PLAYLIST-TYPE:", &ptr)) {
859 ✗ ret = ensure_playlist(c, &pls, url);
860 ✗ if (ret < 0)
861 ✗ goto fail;
862 ✗ if (!strcmp(ptr, "EVENT"))
863 ✗ pls->type = PLS_TYPE_EVENT;
864 ✗ else if (!strcmp(ptr, "VOD"))
865 ✗ pls->type = PLS_TYPE_VOD;
866
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 189 } else if (av_strstart(line, "#EXT-X-MAP:", &ptr)) {
867 ✗ struct init_section_info info = {{0}};
868 ✗ ret = ensure_playlist(c, &pls, url);
869 ✗ if (ret < 0)
870 ✗ goto fail;
871 ✗ ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_init_section_args,
872 &info);
873 ✗ cur_init_section = new_init_section(pls, &info, url);
874 ✗ if (!cur_init_section) {
875 ✗ ret = AVERROR(ENOMEM);
876 ✗ goto fail;
877 }
878 ✗ cur_init_section->key_type = key_type;
879 ✗ if (has_iv) {
880 ✗ memcpy(cur_init_section->iv, iv, sizeof(iv));
881 } else {
882 ✗ int64_t seq = pls->start_seq_no + pls->n_segments;
883 ✗ memset(cur_init_section->iv, 0, sizeof(cur_init_section->iv));
884 ✗ AV_WB64(cur_init_section->iv + 8, seq);
885 }
886
887 ✗ if (key_type != KEY_NONE) {
888 ✗ ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
889 ✗ if (!tmp_str[0]) {
890 ✗ av_free(cur_init_section);
891 ✗ ret = AVERROR_INVALIDDATA;
892 ✗ goto fail;
893 }
894 ✗ cur_init_section->key = av_strdup(tmp_str);
895 ✗ if (!cur_init_section->key) {
896 ✗ av_free(cur_init_section);
897 ✗ ret = AVERROR(ENOMEM);
898 ✗ goto fail;
899 }
900 } else {
901 ✗ cur_init_section->key = NULL;
902 }
903
904
1/2
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 189 } else if (av_strstart(line, "#EXT-X-START:", &ptr)) {
905 ✗ const char *time_offset_value = NULL;
906 ✗ ret = ensure_playlist(c, &pls, url);
907 ✗ if (ret < 0) {
908 ✗ goto fail;
909 }
910 ✗ if (av_strstart(ptr, "TIME-OFFSET=", &time_offset_value)) {
911 ✗ float offset = strtof(time_offset_value, NULL);
912 ✗ pls->start_time_offset = offset * AV_TIME_BASE;
913 ✗ pls->time_offset_flag = 1;
914 } else {
915 ✗ av_log(c->ctx, AV_LOG_WARNING, "#EXT-X-START value is"
916 "invalid, it will be ignored");
917 ✗ continue;
918 }
919
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 189 } else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
920
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 11 if (pls)
921 11 pls->finished = 1;
922
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 178 } else if (av_strstart(line, "#EXTINF:", &ptr)) {
923 65 is_segment = 1;
924 65 duration = atof(ptr) * AV_TIME_BASE;
925
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 113 } else if (av_strstart(line, "#EXT-X-BYTERANGE:", &ptr)) {
926 20 seg_size = strtoll(ptr, NULL, 10);
927 20 ptr = strchr(ptr, '@');
928
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 20 if (ptr)
929 20 seg_offset = strtoll(ptr+1, NULL, 10);
930
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 93 } else if (av_strstart(line, "#", NULL)) {
931 16 av_log(c->ctx, AV_LOG_INFO, "Skip ('%s')\n", line);
932 16 continue;
933
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 77 } else if (line[0]) {
934
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 65 if (is_variant) {
935 ✗ if (!new_variant(c, &variant_info, line, url)) {
936 ✗ ret = AVERROR(ENOMEM);
937 ✗ goto fail;
938 }
939 ✗ is_variant = 0;
940 }
941
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 65 if (is_segment) {
942 struct segment *seg;
943 65 ret = ensure_playlist(c, &pls, url);
944
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 65 if (ret < 0)
945 ✗ goto fail;
946 65 seg = av_malloc(sizeof(struct segment));
947
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 65 if (!seg) {
948 ✗ ret = AVERROR(ENOMEM);
949 ✗ goto fail;
950 }
951
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 65 if (has_iv) {
952 ✗ memcpy(seg->iv, iv, sizeof(iv));
953 } else {
954 65 uint64_t seq = pls->start_seq_no + (uint64_t)pls->n_segments;
955 65 memset(seg->iv, 0, sizeof(seg->iv));
956 65 AV_WB64(seg->iv + 8, seq);
957 }
958
959
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 65 if (key_type != KEY_NONE) {
960 ✗ ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
961 ✗ if (!tmp_str[0]) {
962 ✗ ret = AVERROR_INVALIDDATA;
963 ✗ av_free(seg);
964 ✗ goto fail;
965 }
966 ✗ seg->key = av_strdup(tmp_str);
967 ✗ if (!seg->key) {
968 ✗ av_free(seg);
969 ✗ ret = AVERROR(ENOMEM);
970 ✗ goto fail;
971 }
972 } else {
973 65 seg->key = NULL;
974 }
975
976 65 ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, line);
977
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 65 if (!tmp_str[0]) {
978 ✗ ret = AVERROR_INVALIDDATA;
979 ✗ if (seg->key)
980 ✗ av_free(seg->key);
981 ✗ av_free(seg);
982 ✗ goto fail;
983 }
984 65 seg->url = av_strdup(tmp_str);
985
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 65 if (!seg->url) {
986 ✗ av_free(seg->key);
987 ✗ av_free(seg);
988 ✗ ret = AVERROR(ENOMEM);
989 ✗ goto fail;
990 }
991
992
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 65 if (duration < 0.001 * AV_TIME_BASE) {
993 ✗ av_log(c->ctx, AV_LOG_WARNING, "Cannot get correct #EXTINF value of segment %s,"
994 " set to default value to 1ms.\n", seg->url);
995 ✗ duration = 0.001 * AV_TIME_BASE;
996 }
997 65 seg->duration = duration;
998 65 seg->key_type = key_type;
999 65 dynarray_add(&pls->segments, &pls->n_segments, seg);
1000 65 is_segment = 0;
1001
1002 65 seg->size = seg_size;
1003
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 65 if (seg_size >= 0) {
1004 20 seg->url_offset = seg_offset;
1005 20 seg_offset += seg_size;
1006 20 seg_size = -1;
1007 } else {
1008 45 seg->url_offset = 0;
1009 45 seg_offset = 0;
1010 }
1011
1012 65 seg->init_section = cur_init_section;
1013 }
1014 }
1015 }
1016
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 12 if (prev_segments) {
1017 ✗ if (pls->start_seq_no > prev_start_seq_no && c->first_timestamp != AV_NOPTS_VALUE) {
1018 ✗ int64_t prev_timestamp = c->first_timestamp;
1019 int i;
1020 ✗ int64_t diff = pls->start_seq_no - prev_start_seq_no;
1021 ✗ for (i = 0; i < prev_n_segments && i < diff; i++) {
1022 ✗ c->first_timestamp += prev_segments[i]->duration;
1023 }
1024 ✗ av_log(c->ctx, AV_LOG_DEBUG, "Media sequence change (%"PRId64" -> %"PRId64")"
1025 " reflected in first_timestamp: %"PRId64" -> %"PRId64"\n",
1026 ✗ prev_start_seq_no, pls->start_seq_no,
1027 prev_timestamp, c->first_timestamp);
1028 ✗ } else if (pls->start_seq_no < prev_start_seq_no) {
1029 ✗ av_log(c->ctx, AV_LOG_WARNING, "Media sequence changed unexpectedly: %"PRId64" -> %"PRId64"\n",
1030 ✗ prev_start_seq_no, pls->start_seq_no);
1031 }
1032 ✗ free_segment_dynarray(prev_segments, prev_n_segments);
1033 ✗ av_freep(&prev_segments);
1034 }
1035
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 12 if (pls)
1036 12 pls->last_load_time = av_gettime_relative();
1037
1038 ✗ fail:
1039 12 av_free(new_url);
1040
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 12 if (close_in)
1041 ✗ ff_format_io_close(c->ctx, &in);
1042 12 c->ctx->ctx_flags = c->ctx->ctx_flags & ~(unsigned)AVFMTCTX_UNSEEKABLE;
1043
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 12 if (!c->n_variants || !c->variants[0]->n_playlists ||
1044
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 12 !(c->variants[0]->playlists[0]->finished ||
1045
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 1 c->variants[0]->playlists[0]->type == PLS_TYPE_EVENT))
1046 1 c->ctx->ctx_flags |= AVFMTCTX_UNSEEKABLE;
1047 12 return ret;
1048 }
1049
1050 6826 static struct segment *current_segment(struct playlist *pls)
1051 {
1052 6826 int64_t n = pls->cur_seq_no - pls->start_seq_no;
1053
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 6826 if (n >= pls->n_segments)
1054 2 return NULL;
1055 6824 return pls->segments[n];
1056 }
1057
1058 366 static struct segment *next_segment(struct playlist *pls)
1059 {
1060 366 int64_t n = pls->cur_seq_no - pls->start_seq_no + 1;
1061
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 366 if (n >= pls->n_segments)
1062 72 return NULL;
1063 294 return pls->segments[n];
1064 }
1065
1066 366 static int read_from_url(struct playlist *pls, struct segment *seg,
1067 uint8_t *buf, int buf_size)
1068 {
1069 int ret;
1070
1071 /* limit read if the segment was only a part of a file */
1072
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 366 if (seg->size >= 0)
1073 100 buf_size = FFMIN(buf_size, seg->size - pls->cur_seg_offset);
1074
1075 366 ret = avio_read(pls->input, buf, buf_size);
1076
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 366 if (ret > 0)
1077 307 pls->cur_seg_offset += ret;
1078
1079 366 return ret;
1080 }
1081
1082 /* Parse the raw ID3 data and pass contents to caller */
1083 ✗ static void parse_id3(AVFormatContext *s, AVIOContext *pb,
1084 AVDictionary **metadata, int64_t *dts, HLSAudioSetupInfo *audio_setup_info,
1085 ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
1086 {
1087 static const char id3_priv_owner_ts[] = "com.apple.streaming.transportStreamTimestamp";
1088 static const char id3_priv_owner_audio_setup[] = "com.apple.streaming.audioDescription";
1089 ID3v2ExtraMeta *meta;
1090
1091 ✗ ff_id3v2_read_dict(pb, metadata, ID3v2_DEFAULT_MAGIC, extra_meta);
1092 ✗ for (meta = *extra_meta; meta; meta = meta->next) {
1093 ✗ if (!strcmp(meta->tag, "PRIV")) {
1094 ✗ ID3v2ExtraMetaPRIV *priv = &meta->data.priv;
1095 ✗ if (priv->datasize == 8 && !av_strncasecmp(priv->owner, id3_priv_owner_ts, 44)) {
1096 /* 33-bit MPEG timestamp */
1097 ✗ int64_t ts = AV_RB64(priv->data);
1098 ✗ av_log(s, AV_LOG_DEBUG, "HLS ID3 audio timestamp %"PRId64"\n", ts);
1099 ✗ if ((ts & ~((1ULL << 33) - 1)) == 0)
1100 ✗ *dts = ts;
1101 else
1102 ✗ av_log(s, AV_LOG_ERROR, "Invalid HLS ID3 audio timestamp %"PRId64"\n", ts);
1103 ✗ } else if (priv->datasize >= 8 && !av_strncasecmp(priv->owner, id3_priv_owner_audio_setup, 36)) {
1104 ✗ ff_hls_senc_read_audio_setup_info(audio_setup_info, priv->data, priv->datasize);
1105 }
1106 ✗ } else if (!strcmp(meta->tag, "APIC") && apic)
1107 ✗ *apic = &meta->data.apic;
1108 }
1109 ✗ }
1110
1111 /* Check if the ID3 metadata contents have changed */
1112 ✗ static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata,
1113 ID3v2ExtraMetaAPIC *apic)
1114 {
1115 ✗ const AVDictionaryEntry *entry = NULL;
1116 const AVDictionaryEntry *oldentry;
1117 /* check that no keys have changed values */
1118 ✗ while ((entry = av_dict_iterate(metadata, entry))) {
1119 ✗ oldentry = av_dict_get(pls->id3_initial, entry->key, NULL, AV_DICT_MATCH_CASE);
1120 ✗ if (!oldentry || strcmp(oldentry->value, entry->value) != 0)
1121 ✗ return 1;
1122 }
1123
1124 /* check if apic appeared */
1125 ✗ if (apic && (pls->ctx->nb_streams != 2 || !pls->ctx->streams[1]->attached_pic.data))
1126 ✗ return 1;
1127
1128 ✗ if (apic) {
1129 ✗ int size = pls->ctx->streams[1]->attached_pic.size;
1130 ✗ if (size != apic->buf->size - AV_INPUT_BUFFER_PADDING_SIZE)
1131 ✗ return 1;
1132
1133 ✗ if (memcmp(apic->buf->data, pls->ctx->streams[1]->attached_pic.data, size) != 0)
1134 ✗ return 1;
1135 }
1136
1137 ✗ return 0;
1138 }
1139
1140 /* Parse ID3 data and handle the found data */
1141 ✗ static void handle_id3(AVIOContext *pb, struct playlist *pls)
1142 {
1143 ✗ AVDictionary *metadata = NULL;
1144 ✗ ID3v2ExtraMetaAPIC *apic = NULL;
1145 ✗ ID3v2ExtraMeta *extra_meta = NULL;
1146 ✗ int64_t timestamp = AV_NOPTS_VALUE;
1147
1148 ✗ parse_id3(pls->ctx, pb, &metadata, &timestamp, &pls->audio_setup_info, &apic, &extra_meta);
1149
1150 ✗ if (timestamp != AV_NOPTS_VALUE) {
1151 ✗ pls->id3_mpegts_timestamp = timestamp;
1152 ✗ pls->id3_offset = 0;
1153 }
1154
1155 ✗ if (!pls->id3_found) {
1156 /* initial ID3 tags */
1157 ✗ av_assert0(!pls->id3_deferred_extra);
1158 ✗ pls->id3_found = 1;
1159
1160 /* get picture attachment and set text metadata */
1161 ✗ if (pls->ctx->nb_streams)
1162 ✗ ff_id3v2_parse_apic(pls->ctx, extra_meta);
1163 else
1164 /* demuxer not yet opened, defer picture attachment */
1165 ✗ pls->id3_deferred_extra = extra_meta;
1166
1167 ✗ ff_id3v2_parse_priv_dict(&metadata, extra_meta);
1168 ✗ av_dict_copy(&pls->ctx->metadata, metadata, 0);
1169 ✗ pls->id3_initial = metadata;
1170
1171 } else {
1172 ✗ if (!pls->id3_changed && id3_has_changed_values(pls, metadata, apic)) {
1173 ✗ avpriv_report_missing_feature(pls->parent, "Changing ID3 metadata in HLS audio elementary stream");
1174 ✗ pls->id3_changed = 1;
1175 }
1176 ✗ av_dict_free(&metadata);
1177 }
1178
1179 ✗ if (!pls->id3_deferred_extra)
1180 ✗ ff_id3v2_free_extra_meta(&extra_meta);
1181 ✗ }
1182
1183 12 static void intercept_id3(struct playlist *pls, uint8_t *buf,
1184 int buf_size, int *len)
1185 {
1186 /* intercept id3 tags, we do not want to pass them to the raw
1187 * demuxer on all segment switches */
1188 int bytes;
1189 12 int id3_buf_pos = 0;
1190 12 int fill_buf = 0;
1191 12 struct segment *seg = current_segment(pls);
1192
1193 /* gather all the id3 tags */
1194 while (1) {
1195 /* see if we can retrieve enough data for ID3 header */
1196
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 12 if (*len < ID3v2_HEADER_SIZE && buf_size >= ID3v2_HEADER_SIZE) {
1197 ✗ bytes = read_from_url(pls, seg, buf + *len, ID3v2_HEADER_SIZE - *len);
1198 ✗ if (bytes > 0) {
1199
1200 ✗ if (bytes == ID3v2_HEADER_SIZE - *len)
1201 /* no EOF yet, so fill the caller buffer again after
1202 * we have stripped the ID3 tags */
1203 ✗ fill_buf = 1;
1204
1205 ✗ *len += bytes;
1206
1207 ✗ } else if (*len <= 0) {
1208 /* error/EOF */
1209 ✗ *len = bytes;
1210 ✗ fill_buf = 0;
1211 }
1212 }
1213
1214
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 12 if (*len < ID3v2_HEADER_SIZE)
1215 ✗ break;
1216
1217
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 12 if (ff_id3v2_match(buf, ID3v2_DEFAULT_MAGIC)) {
1218 ✗ int64_t maxsize = seg->size >= 0 ? seg->size : 1024*1024;
1219 ✗ int taglen = ff_id3v2_tag_len(buf);
1220 ✗ int tag_got_bytes = FFMIN(taglen, *len);
1221 ✗ int remaining = taglen - tag_got_bytes;
1222
1223 ✗ if (taglen > maxsize) {
1224 ✗ av_log(pls->parent, AV_LOG_ERROR, "Too large HLS ID3 tag (%d > %"PRId64" bytes)\n",
1225 taglen, maxsize);
1226 ✗ break;
1227 }
1228
1229 /*
1230 * Copy the id3 tag to our temporary id3 buffer.
1231 * We could read a small id3 tag directly without memcpy, but
1232 * we would still need to copy the large tags, and handling
1233 * both of those cases together with the possibility for multiple
1234 * tags would make the handling a bit complex.
1235 */
1236 ✗ pls->id3_buf = av_fast_realloc(pls->id3_buf, &pls->id3_buf_size, id3_buf_pos + taglen);
1237 ✗ if (!pls->id3_buf)
1238 ✗ break;
1239 ✗ memcpy(pls->id3_buf + id3_buf_pos, buf, tag_got_bytes);
1240 ✗ id3_buf_pos += tag_got_bytes;
1241
1242 /* strip the intercepted bytes */
1243 ✗ *len -= tag_got_bytes;
1244 ✗ memmove(buf, buf + tag_got_bytes, *len);
1245 ✗ av_log(pls->parent, AV_LOG_DEBUG, "Stripped %d HLS ID3 bytes\n", tag_got_bytes);
1246
1247 ✗ if (remaining > 0) {
1248 /* read the rest of the tag in */
1249 ✗ if (read_from_url(pls, seg, pls->id3_buf + id3_buf_pos, remaining) != remaining)
1250 ✗ break;
1251 ✗ id3_buf_pos += remaining;
1252 ✗ av_log(pls->parent, AV_LOG_DEBUG, "Stripped additional %d HLS ID3 bytes\n", remaining);
1253 }
1254
1255 } else {
1256 /* no more ID3 tags */
1257 12 break;
1258 }
1259 }
1260
1261 /* re-fill buffer for the caller unless EOF */
1262
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 12 if (*len >= 0 && (fill_buf || *len == 0)) {
1263 ✗ bytes = read_from_url(pls, seg, buf + *len, buf_size - *len);
1264
1265 /* ignore error if we already had some data */
1266 ✗ if (bytes >= 0)
1267 ✗ *len += bytes;
1268 ✗ else if (*len == 0)
1269 ✗ *len = bytes;
1270 }
1271
1272
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 12 if (pls->id3_buf) {
1273 /* Now parse all the ID3 tags */
1274 FFIOContext id3ioctx;
1275 ✗ ffio_init_read_context(&id3ioctx, pls->id3_buf, id3_buf_pos);
1276 ✗ handle_id3(&id3ioctx.pub, pls);
1277 }
1278
1279
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 12 if (pls->is_id3_timestamped == -1)
1280 12 pls->is_id3_timestamped = (pls->id3_mpegts_timestamp != AV_NOPTS_VALUE);
1281 12 }
1282
1283 61 static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg, AVIOContext **in)
1284 {
1285 61 AVDictionary *opts = NULL;
1286 int ret;
1287 61 int is_http = 0;
1288
1289
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 61 if (c->http_persistent)
1290 61 av_dict_set(&opts, "multiple_requests", "1", 0);
1291
1292
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 61 if (seg->size >= 0) {
1293 /* try to restrict the HTTP request to the part we want
1294 * (if this is in fact a HTTP request) */
1295 20 av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1296 20 av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1297 }
1298
1299 61 av_log(pls->parent, AV_LOG_VERBOSE, "HLS request for url '%s', offset %"PRId64", playlist %d\n",
1300 seg->url, seg->url_offset, pls->index);
1301
1302
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 61 if (seg->key_type == KEY_AES_128 || seg->key_type == KEY_SAMPLE_AES) {
1303 ✗ if (strcmp(seg->key, pls->key_url)) {
1304 ✗ AVIOContext *pb = NULL;
1305 ✗ if (open_url(pls->parent, &pb, seg->key, &c->avio_opts, opts, NULL) == 0) {
1306 ✗ ret = avio_read(pb, pls->key, sizeof(pls->key));
1307 ✗ if (ret != sizeof(pls->key)) {
1308 ✗ av_log(pls->parent, AV_LOG_ERROR, "Unable to read key file %s\n",
1309 seg->key);
1310 }
1311 ✗ ff_format_io_close(pls->parent, &pb);
1312 } else {
1313 ✗ av_log(pls->parent, AV_LOG_ERROR, "Unable to open key file %s\n",
1314 seg->key);
1315 }
1316 ✗ av_strlcpy(pls->key_url, seg->key, sizeof(pls->key_url));
1317 }
1318 }
1319
1320
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 61 if (seg->key_type == KEY_AES_128) {
1321 char iv[33], key[33], url[MAX_URL_SIZE];
1322 ✗ ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
1323 ✗ ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
1324 ✗ if (strstr(seg->url, "://"))
1325 ✗ snprintf(url, sizeof(url), "crypto+%s", seg->url);
1326 else
1327 ✗ snprintf(url, sizeof(url), "crypto:%s", seg->url);
1328
1329 ✗ av_dict_set(&opts, "key", key, 0);
1330 ✗ av_dict_set(&opts, "iv", iv, 0);
1331
1332 ✗ ret = open_url(pls->parent, in, url, &c->avio_opts, opts, &is_http);
1333 ✗ if (ret < 0) {
1334 ✗ goto cleanup;
1335 }
1336 ✗ ret = 0;
1337 } else {
1338 61 ret = open_url(pls->parent, in, seg->url, &c->avio_opts, opts, &is_http);
1339 }
1340
1341 /* Seek to the requested position. If this was a HTTP request, the offset
1342 * should already be where want it to, but this allows e.g. local testing
1343 * without a HTTP server.
1344 *
1345 * This is not done for HTTP at all as avio_seek() does internal bookkeeping
1346 * of file offset which is out-of-sync with the actual offset when "offset"
1347 * AVOption is used with http protocol, causing the seek to not be a no-op
1348 * as would be expected. Wrong offset received from the server will not be
1349 * noticed without the call, though.
1350 */
1351
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 61 if (ret == 0 && !is_http && seg->url_offset) {
1352 15 int64_t seekret = avio_seek(*in, seg->url_offset, SEEK_SET);
1353
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 15 if (seekret < 0) {
1354 ✗ av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of HLS segment '%s'\n", seg->url_offset, seg->url);
1355 ✗ ret = seekret;
1356 ✗ ff_format_io_close(pls->parent, in);
1357 }
1358 }
1359
1360 61 cleanup:
1361 61 av_dict_free(&opts);
1362 61 pls->cur_seg_offset = 0;
1363 61 return ret;
1364 }
1365
1366 61 static int update_init_section(struct playlist *pls, struct segment *seg)
1367 {
1368 static const int max_init_section_size = 1024*1024;
1369 61 HLSContext *c = pls->parent->priv_data;
1370 int64_t sec_size;
1371 int64_t urlsize;
1372 int ret;
1373
1374
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 61 if (seg->init_section == pls->cur_init_section)
1375 61 return 0;
1376
1377 ✗ pls->cur_init_section = NULL;
1378
1379 ✗ if (!seg->init_section)
1380 ✗ return 0;
1381
1382 ✗ ret = open_input(c, pls, seg->init_section, &pls->input);
1383 ✗ if (ret < 0) {
1384 ✗ av_log(pls->parent, AV_LOG_WARNING,
1385 "Failed to open an initialization section in playlist %d\n",
1386 pls->index);
1387 ✗ return ret;
1388 }
1389
1390 ✗ if (seg->init_section->size >= 0)
1391 ✗ sec_size = seg->init_section->size;
1392 ✗ else if ((urlsize = avio_size(pls->input)) >= 0)
1393 ✗ sec_size = urlsize;
1394 else
1395 ✗ sec_size = max_init_section_size;
1396
1397 ✗ av_log(pls->parent, AV_LOG_DEBUG,
1398 "Downloading an initialization section of size %"PRId64"\n",
1399 sec_size);
1400
1401 ✗ sec_size = FFMIN(sec_size, max_init_section_size);
1402
1403 ✗ av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1404
1405 ✗ ret = read_from_url(pls, seg->init_section, pls->init_sec_buf,
1406 ✗ pls->init_sec_buf_size);
1407 ✗ ff_format_io_close(pls->parent, &pls->input);
1408
1409 ✗ if (ret < 0)
1410 ✗ return ret;
1411
1412 ✗ pls->cur_init_section = seg->init_section;
1413 ✗ pls->init_sec_data_len = ret;
1414 ✗ pls->init_sec_buf_read_offset = 0;
1415
1416 /* spec says audio elementary streams do not have media initialization
1417 * sections, so there should be no ID3 timestamps */
1418 ✗ pls->is_id3_timestamped = 0;
1419
1420 ✗ return 0;
1421 }
1422
1423 95 static int64_t default_reload_interval(struct playlist *pls)
1424 {
1425 95 return pls->n_segments > 0 ?
1426
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 95 pls->segments[pls->n_segments - 1]->duration :
1427 pls->target_duration;
1428 }
1429
1430 6457 static int playlist_needed(struct playlist *pls)
1431 {
1432 6457 AVFormatContext *s = pls->parent;
1433 int i, j;
1434 6457 int stream_needed = 0;
1435 int first_st;
1436
1437 /* If there is no context or streams yet, the playlist is needed */
1438
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 6457 if (!pls->ctx || !pls->n_main_streams)
1439 12 return 1;
1440
1441 /* check if any of the streams in the playlist are needed */
1442
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 6445 for (i = 0; i < pls->n_main_streams; i++) {
1443
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 6445 if (pls->main_streams[i]->discard < AVDISCARD_ALL) {
1444 6445 stream_needed = 1;
1445 6445 break;
1446 }
1447 }
1448
1449 /* If all streams in the playlist were discarded, the playlist is not
1450 * needed (regardless of whether whole programs are discarded or not). */
1451
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 6445 if (!stream_needed)
1452 ✗ return 0;
1453
1454 /* Otherwise, check if all the programs (variants) this playlist is in are
1455 * discarded. Since all streams in the playlist are part of the same programs
1456 * we can just check the programs of the first stream. */
1457
1458 6445 first_st = pls->main_streams[0]->index;
1459
1460
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 6445 for (i = 0; i < s->nb_programs; i++) {
1461 6445 AVProgram *program = s->programs[i];
1462
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 6445 if (program->discard < AVDISCARD_ALL) {
1463
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 6445 for (j = 0; j < program->nb_stream_indexes; j++) {
1464
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 6445 if (program->stream_index[j] == first_st) {
1465 /* playlist is in an undiscarded program */
1466 6445 return 1;
1467 }
1468 }
1469 }
1470 }
1471
1472 /* some streams were not discarded but all the programs were */
1473 ✗ return 0;
1474 }
1475
1476 341 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1477 {
1478 341 struct playlist *v = opaque;
1479 341 HLSContext *c = v->parent->priv_data;
1480 int ret;
1481 341 int just_opened = 0;
1482 341 int reload_count = 0;
1483 341 int segment_retries = 0;
1484 struct segment *seg;
1485
1486 400 restart:
1487
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 400 if (!v->needed)
1488 ✗ return AVERROR_EOF;
1489
1490
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 400 if (!v->input || (c->http_persistent && v->input_read_done)) {
1491 int64_t reload_interval;
1492
1493 /* Check that the playlist is still needed before opening a new
1494 * segment. */
1495 95 v->needed = playlist_needed(v);
1496
1497
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 95 if (!v->needed) {
1498 ✗ av_log(v->parent, AV_LOG_INFO, "No longer receiving playlist %d ('%s')\n",
1499 ✗ v->index, v->url);
1500 ✗ return AVERROR_EOF;
1501 }
1502
1503 /* If this is a live stream and the reload interval has elapsed since
1504 * the last playlist reload, reload the playlists now. */
1505 95 reload_interval = default_reload_interval(v);
1506
1507 ✗ reload:
1508 95 reload_count++;
1509
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 95 if (reload_count > c->max_reload)
1510 ✗ return AVERROR_EOF;
1511
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 95 if (!v->finished &&
1512
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 3 av_gettime_relative() - v->last_load_time >= reload_interval) {
1513 ✗ if ((ret = parse_playlist(c, v->url, v, NULL)) < 0) {
1514 ✗ if (ret != AVERROR_EXIT)
1515 ✗ av_log(v->parent, AV_LOG_WARNING, "Failed to reload playlist %d\n",
1516 v->index);
1517 ✗ return ret;
1518 }
1519 /* If we need to reload the playlist again below (if
1520 * there's still no more segments), switch to a reload
1521 * interval of half the target duration. */
1522 ✗ reload_interval = v->target_duration / 2;
1523 }
1524
1/2
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 95 if (v->cur_seq_no < v->start_seq_no) {
1525 ✗ av_log(v->parent, AV_LOG_WARNING,
1526 "skipping %"PRId64" segments ahead, expired from playlists\n",
1527 ✗ v->start_seq_no - v->cur_seq_no);
1528 ✗ v->cur_seq_no = v->start_seq_no;
1529 }
1530
2/2
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 95 if (v->cur_seq_no > v->last_seq_no) {
1531 63 v->last_seq_no = v->cur_seq_no;
1532 63 v->m3u8_hold_counters = 0;
1533
1/2
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✗ Branch 1 not taken.
 32 } else if (v->last_seq_no == v->cur_seq_no) {
1534 32 v->m3u8_hold_counters++;
1535
1/2
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✓ Branch 1 taken 32 times.
 32 if (v->m3u8_hold_counters >= c->m3u8_hold_counters) {
1536 ✗ return AVERROR_EOF;
1537 }
1538 } else {
1539 ✗ av_log(v->parent, AV_LOG_WARNING, "The m3u8 list sequence may have been wrapped.\n");
1540 }
1541
2/2
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 95 if (v->cur_seq_no >= v->start_seq_no + v->n_segments) {
1542
1/2
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 34 if (v->finished)
1543 34 return AVERROR_EOF;
1544 ✗ while (av_gettime_relative() - v->last_load_time < reload_interval) {
1545 ✗ if (ff_check_interrupt(c->interrupt_callback))
1546 ✗ return AVERROR_EXIT;
1547 ✗ av_usleep(100*1000);
1548 }
1549 /* Enough time has elapsed since the last reload */
1550 ✗ goto reload;
1551 }
1552
1553 61 v->input_read_done = 0;
1554 61 seg = current_segment(v);
1555
1556 /* load/update Media Initialization Section, if any */
1557 61 ret = update_init_section(v, seg);
1558
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 61 if (ret)
1559 ✗ return ret;
1560
1561
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 61 if (c->http_multiple == 1 && v->input_next_requested) {
1562 ✗ FFSWAP(AVIOContext *, v->input, v->input_next);
1563 ✗ v->cur_seg_offset = 0;
1564 ✗ v->input_next_requested = 0;
1565 ✗ ret = 0;
1566 } else {
1567 61 ret = open_input(c, v, seg, &v->input);
1568 }
1569
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✓ Branch 1 taken 61 times.
 61 if (ret < 0) {
1570 ✗ if (ff_check_interrupt(c->interrupt_callback))
1571 ✗ return AVERROR_EXIT;
1572 ✗ av_log(v->parent, AV_LOG_WARNING, "Failed to open segment %"PRId64" of playlist %d\n",
1573 v->cur_seq_no,
1574 v->index);
1575 ✗ if (segment_retries >= c->seg_max_retry) {
1576 ✗ av_log(v->parent, AV_LOG_WARNING, "Segment %"PRId64" of playlist %d failed too many times, skipping\n",
1577 v->cur_seq_no,
1578 v->index);
1579 ✗ v->cur_seq_no++;
1580 ✗ segment_retries = 0;
1581 } else {
1582 ✗ segment_retries++;
1583 }
1584 ✗ goto reload;
1585 }
1586 61 segment_retries = 0;
1587 61 just_opened = 1;
1588 }
1589
1590
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 366 if (c->http_multiple == -1) {
1591 366 uint8_t *http_version_opt = NULL;
1592 366 int r = av_opt_get(v->input, "http_version", AV_OPT_SEARCH_CHILDREN, &http_version_opt);
1593
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 366 if (r >= 0) {
1594 ✗ c->http_multiple = (!strncmp((const char *)http_version_opt, "1.1", 3) || !strncmp((const char *)http_version_opt, "2.0", 3));
1595 ✗ av_freep(&http_version_opt);
1596 }
1597 }
1598
1599 366 seg = next_segment(v);
1600
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 366 if (c->http_multiple == 1 && !v->input_next_requested &&
1601 ✗ seg && seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1602 ✗ ret = open_input(c, v, seg, &v->input_next);
1603 ✗ if (ret < 0) {
1604 ✗ if (ff_check_interrupt(c->interrupt_callback))
1605 ✗ return AVERROR_EXIT;
1606 ✗ av_log(v->parent, AV_LOG_WARNING, "Failed to open segment %"PRId64" of playlist %d\n",
1607 ✗ v->cur_seq_no + 1,
1608 v->index);
1609 } else {
1610 ✗ v->input_next_requested = 1;
1611 }
1612 }
1613
1614
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 366 if (v->init_sec_buf_read_offset < v->init_sec_data_len) {
1615 /* Push init section out first before first actual segment */
1616 ✗ int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1617 ✗ memcpy(buf, v->init_sec_buf, copy_size);
1618 ✗ v->init_sec_buf_read_offset += copy_size;
1619 ✗ return copy_size;
1620 }
1621
1622 366 seg = current_segment(v);
1623 366 ret = read_from_url(v, seg, buf, buf_size);
1624
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 366 if (ret > 0) {
1625
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✓ Branch 2 taken 12 times.
✓ Branch 3 taken 49 times.
 307 if (just_opened && v->is_id3_timestamped != 0) {
1626 /* Intercept ID3 tags here, elementary audio streams are required
1627 * to convey timestamps using them in the beginning of each segment. */
1628 12 intercept_id3(v, buf, buf_size, &ret);
1629 }
1630
1631 307 return ret;
1632 }
1633
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 59 if (c->http_persistent &&
1634
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✓ Branch 4 taken 59 times.
 59 seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1635 ✗ v->input_read_done = 1;
1636 } else {
1637 59 ff_format_io_close(v->parent, &v->input);
1638 }
1639 59 v->cur_seq_no++;
1640
1641 59 c->cur_seq_no = v->cur_seq_no;
1642
1643 59 goto restart;
1644 }
1645
1646 ✗ static void add_renditions_to_variant(HLSContext *c, struct variant *var,
1647 enum AVMediaType type, const char *group_id)
1648 {
1649 int i;
1650
1651 ✗ for (i = 0; i < c->n_renditions; i++) {
1652 ✗ struct rendition *rend = c->renditions[i];
1653
1654 ✗ if (rend->type == type && !strcmp(rend->group_id, group_id)) {
1655
1656 ✗ if (rend->playlist)
1657 /* rendition is an external playlist
1658 * => add the playlist to the variant */
1659 ✗ dynarray_add(&var->playlists, &var->n_playlists, rend->playlist);
1660 else
1661 /* rendition is part of the variant main Media Playlist
1662 * => add the rendition to the main Media Playlist */
1663 ✗ dynarray_add(&var->playlists[0]->renditions,
1664 &var->playlists[0]->n_renditions,
1665 rend);
1666 }
1667 }
1668 ✗ }
1669
1670 36 static void add_metadata_from_renditions(AVFormatContext *s, struct playlist *pls,
1671 enum AVMediaType type)
1672 {
1673 36 int rend_idx = 0;
1674 int i;
1675
1676
2/2
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 60 for (i = 0; i < pls->n_main_streams; i++) {
1677 36 AVStream *st = pls->main_streams[i];
1678
1679
2/2
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 36 if (st->codecpar->codec_type != type)
1680 24 continue;
1681
1682
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 12 for (; rend_idx < pls->n_renditions; rend_idx++) {
1683 ✗ struct rendition *rend = pls->renditions[rend_idx];
1684
1685 ✗ if (rend->type != type)
1686 ✗ continue;
1687
1688 ✗ if (rend->language[0])
1689 ✗ av_dict_set(&st->metadata, "language", rend->language, 0);
1690 ✗ if (rend->name[0])
1691 ✗ av_dict_set(&st->metadata, "comment", rend->name, 0);
1692
1693 ✗ st->disposition |= rend->disposition;
1694 }
1695
1/2
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 12 if (rend_idx >=pls->n_renditions)
1696 12 break;
1697 }
1698 36 }
1699
1700 /* if timestamp was in valid range: returns 1 and sets seq_no
1701 * if not: returns 0 and sets seq_no to closest segment */
1702 ✗ static int find_timestamp_in_playlist(HLSContext *c, struct playlist *pls,
1703 int64_t timestamp, int64_t *seq_no,
1704 int64_t *seg_start_ts)
1705 {
1706 int i;
1707 ✗ int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ?
1708 ✗ 0 : c->first_timestamp;
1709
1710 ✗ if (timestamp < pos) {
1711 ✗ *seq_no = pls->start_seq_no;
1712 ✗ return 0;
1713 }
1714
1715 ✗ for (i = 0; i < pls->n_segments; i++) {
1716 ✗ int64_t diff = pos + pls->segments[i]->duration - timestamp;
1717 ✗ if (diff > 0) {
1718 ✗ *seq_no = pls->start_seq_no + i;
1719 ✗ if (seg_start_ts) {
1720 ✗ *seg_start_ts = pos;
1721 }
1722 ✗ return 1;
1723 }
1724 ✗ pos += pls->segments[i]->duration;
1725 }
1726
1727 ✗ *seq_no = pls->start_seq_no + pls->n_segments - 1;
1728
1729 ✗ return 0;
1730 }
1731
1732 12 static int64_t select_cur_seq_no(HLSContext *c, struct playlist *pls)
1733 {
1734 int64_t seq_no;
1735
1736
3/6
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 12 if (!pls->finished && !c->first_packet &&
1737 ✗ av_gettime_relative() - pls->last_load_time >= default_reload_interval(pls))
1738 /* reload the playlist since it was suspended */
1739 ✗ parse_playlist(c, pls->url, pls, NULL);
1740
1741 /* If playback is already in progress (we are just selecting a new
1742 * playlist) and this is a complete file, find the matching segment
1743 * by counting durations. */
1744
3/4
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 12 if (pls->finished && c->cur_timestamp != AV_NOPTS_VALUE) {
1745 ✗ find_timestamp_in_playlist(c, pls, c->cur_timestamp, &seq_no, NULL);
1746 ✗ return seq_no;
1747 }
1748
1749
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 12 if (!pls->finished) {
1750
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 1 if (!c->first_packet && /* we are doing a segment selection during playback */
1751 ✗ c->cur_seq_no >= pls->start_seq_no &&
1752 ✗ c->cur_seq_no < pls->start_seq_no + pls->n_segments)
1753 /* While spec 3.4.3 says that we cannot assume anything about the
1754 * content at the same sequence number on different playlists,
1755 * in practice this seems to work and doing it otherwise would
1756 * require us to download a segment to inspect its timestamps. */
1757 ✗ return c->cur_seq_no;
1758
1759 /* If this is a live stream, start live_start_index segments from the
1760 * start or end */
1761
1/2
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 1 if (c->live_start_index < 0)
1762 1 seq_no = pls->start_seq_no + FFMAX(pls->n_segments +
1763 c->live_start_index, 0);
1764 else
1765 ✗ seq_no = pls->start_seq_no + FFMIN(c->live_start_index,
1766 pls->n_segments - 1);
1767
1768 /* If #EXT-X-START in playlist, need to recalculate */
1769
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 1 if (pls->time_offset_flag && c->prefer_x_start) {
1770 int64_t start_timestamp;
1771 ✗ int64_t playlist_duration = 0;
1772 ✗ int64_t cur_timestamp = c->cur_timestamp == AV_NOPTS_VALUE ? 0 :
1773 c->cur_timestamp;
1774
1775 ✗ for (int i = 0; i < pls->n_segments; i++)
1776 ✗ playlist_duration += pls->segments[i]->duration;
1777
1778 /* If the absolute value of TIME-OFFSET exceeds
1779 * the duration of the playlist, it indicates either the end of the
1780 * playlist (if positive) or the beginning of the playlist (if
1781 * negative). */
1782 ✗ if (pls->start_time_offset >=0 &&
1783 ✗ pls->start_time_offset > playlist_duration)
1784 ✗ start_timestamp = cur_timestamp + playlist_duration;
1785 ✗ else if (pls->start_time_offset >= 0 &&
1786 ✗ pls->start_time_offset <= playlist_duration)
1787 ✗ start_timestamp = cur_timestamp + pls->start_time_offset;
1788 ✗ else if (pls->start_time_offset < 0 &&
1789 ✗ pls->start_time_offset < -playlist_duration)
1790 ✗ start_timestamp = cur_timestamp;
1791 ✗ else if (pls->start_time_offset < 0 &&
1792 ✗ pls->start_time_offset > -playlist_duration)
1793 ✗ start_timestamp = cur_timestamp + playlist_duration +
1794 ✗ pls->start_time_offset;
1795 else
1796 ✗ start_timestamp = cur_timestamp;
1797
1798 ✗ find_timestamp_in_playlist(c, pls, start_timestamp, &seq_no, NULL);
1799 }
1800 1 return seq_no;
1801 }
1802
1803 /* Otherwise just start on the first segment. */
1804 11 return pls->start_seq_no;
1805 }
1806
1807 ✗ static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1808 int flags, AVDictionary **opts)
1809 {
1810 ✗ av_log(s, AV_LOG_ERROR,
1811 "A HLS playlist item '%s' referred to an external file '%s'. "
1812 "Opening this file was forbidden for security reasons\n",
1813 s->url, url);
1814 ✗ return AVERROR(EPERM);
1815 }
1816
1817 12 static void add_stream_to_programs(AVFormatContext *s, struct playlist *pls, AVStream *stream)
1818 {
1819 12 HLSContext *c = s->priv_data;
1820 int i, j;
1821 12 int bandwidth = -1;
1822
1823
2/2
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 24 for (i = 0; i < c->n_variants; i++) {
1824 12 struct variant *v = c->variants[i];
1825
1826
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 24 for (j = 0; j < v->n_playlists; j++) {
1827
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 12 if (v->playlists[j] != pls)
1828 ✗ continue;
1829
1830 12 av_program_add_stream_index(s, i, stream->index);
1831
1832
1/2
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 12 if (bandwidth < 0)
1833 12 bandwidth = v->bandwidth;
1834 ✗ else if (bandwidth != v->bandwidth)
1835 ✗ bandwidth = -1; /* stream in multiple variants with different bandwidths */
1836 }
1837 }
1838
1839
1/2
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 12 if (bandwidth >= 0)
1840 12 av_dict_set_int(&stream->metadata, "variant_bitrate", bandwidth, 0);
1841 12 }
1842
1843 22 static int set_stream_info_from_input_stream(AVStream *st, struct playlist *pls, AVStream *ist)
1844 {
1845 int err;
1846
1847 22 err = avcodec_parameters_copy(st->codecpar, ist->codecpar);
1848
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 22 if (err < 0)
1849 ✗ return err;
1850
1851
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 22 if (pls->is_id3_timestamped) /* custom timestamps via id3 */
1852 ✗ avpriv_set_pts_info(st, 33, 1, MPEG_TIME_BASE);
1853 else
1854 22 avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, ist->time_base.den);
1855
1856 // copy disposition
1857 22 st->disposition = ist->disposition;
1858
1859 22 av_dict_copy(&st->metadata, ist->metadata, 0);
1860
1861 22 ffstream(st)->need_context_update = 1;
1862
1863 22 return 0;
1864 }
1865
1866 /* add new subdemuxer streams to our context, if any */
1867 6363 static int update_streams_from_subdemuxer(AVFormatContext *s, struct playlist *pls)
1868 {
1869 int err;
1870
1871
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 6375 while (pls->n_main_streams < pls->ctx->nb_streams) {
1872 12 int ist_idx = pls->n_main_streams;
1873 12 AVStream *st = avformat_new_stream(s, NULL);
1874 12 AVStream *ist = pls->ctx->streams[ist_idx];
1875
1876
1/2
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 12 if (!st)
1877 ✗ return AVERROR(ENOMEM);
1878
1879 12 st->id = pls->index;
1880 12 dynarray_add(&pls->main_streams, &pls->n_main_streams, st);
1881
1882 12 add_stream_to_programs(s, pls, st);
1883
1884 12 err = set_stream_info_from_input_stream(st, pls, ist);
1885
1/2
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 12 if (err < 0)
1886 ✗ return err;
1887 }
1888
1889 6363 return 0;
1890 }
1891
1892 23 static void update_noheader_flag(AVFormatContext *s)
1893 {
1894 23 HLSContext *c = s->priv_data;
1895 23 int flag_needed = 0;
1896 int i;
1897
1898
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 35 for (i = 0; i < c->n_playlists; i++) {
1899 23 struct playlist *pls = c->playlists[i];
1900
1901
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 23 if (pls->has_noheader_flag) {
1902 11 flag_needed = 1;
1903 11 break;
1904 }
1905 }
1906
1907
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 23 if (flag_needed)
1908 11 s->ctx_flags |= AVFMTCTX_NOHEADER;
1909 else
1910 12 s->ctx_flags &= ~AVFMTCTX_NOHEADER;
1911 23 }
1912
1913 12 static int hls_close(AVFormatContext *s)
1914 {
1915 12 HLSContext *c = s->priv_data;
1916
1917 12 free_playlist_list(c);
1918 12 free_variant_list(c);
1919 12 free_rendition_list(c);
1920
1921
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 12 if (c->crypto_ctx.aes_ctx)
1922 ✗ av_free(c->crypto_ctx.aes_ctx);
1923
1924 12 av_dict_free(&c->avio_opts);
1925 12 ff_format_io_close(c->ctx, &c->playlist_pb);
1926
1927 12 return 0;
1928 }
1929
1930 12 static int hls_read_header(AVFormatContext *s)
1931 {
1932 12 HLSContext *c = s->priv_data;
1933 12 int ret = 0, i;
1934 12 int64_t highest_cur_seq_no = 0;
1935
1936 12 c->ctx = s;
1937 12 c->interrupt_callback = &s->interrupt_callback;
1938
1939 12 c->first_packet = 1;
1940 12 c->first_timestamp = AV_NOPTS_VALUE;
1941 12 c->cur_timestamp = AV_NOPTS_VALUE;
1942
1943
1/2
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 12 if ((ret = ffio_copy_url_options(s->pb, &c->avio_opts)) < 0)
1944 ✗ return ret;
1945
1946 /* XXX: Some HLS servers don't like being sent the range header,
1947 in this case, need to setting http_seekable = 0 to disable
1948 the range header */
1949 12 av_dict_set_int(&c->avio_opts, "seekable", c->http_seekable, 0);
1950
1951
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 12 if ((ret = parse_playlist(c, s->url, NULL, s->pb)) < 0)
1952 ✗ return ret;
1953
1954
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 12 if (c->n_variants == 0) {
1955 ✗ av_log(s, AV_LOG_WARNING, "Empty playlist\n");
1956 ✗ return AVERROR_EOF;
1957 }
1958 /* If the playlist only contained playlists (Master Playlist),
1959 * parse each individual playlist. */
1960
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 12 if (c->n_playlists > 1 || c->playlists[0]->n_segments == 0) {
1961 ✗ for (i = 0; i < c->n_playlists; i++) {
1962 ✗ struct playlist *pls = c->playlists[i];
1963 ✗ pls->m3u8_hold_counters = 0;
1964 ✗ if ((ret = parse_playlist(c, pls->url, pls, NULL)) < 0) {
1965 ✗ av_log(s, AV_LOG_WARNING, "parse_playlist error %s [%s]\n", av_err2str(ret), pls->url);
1966 ✗ pls->broken = 1;
1967 ✗ if (c->n_playlists > 1)
1968 ✗ continue;
1969 ✗ return ret;
1970 }
1971 }
1972 }
1973
1974
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 24 for (i = 0; i < c->n_variants; i++) {
1975
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 12 if (c->variants[i]->playlists[0]->n_segments == 0) {
1976 ✗ av_log(s, AV_LOG_WARNING, "Empty segment [%s]\n", c->variants[i]->playlists[0]->url);
1977 ✗ c->variants[i]->playlists[0]->broken = 1;
1978 }
1979 }
1980
1981 /* If this isn't a live stream, calculate the total duration of the
1982 * stream. */
1983
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 12 if (c->variants[0]->playlists[0]->finished) {
1984 11 int64_t duration = 0;
1985
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 71 for (i = 0; i < c->variants[0]->playlists[0]->n_segments; i++)
1986 60 duration += c->variants[0]->playlists[0]->segments[i]->duration;
1987 11 s->duration = duration;
1988 }
1989
1990 /* Associate renditions with variants */
1991
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 24 for (i = 0; i < c->n_variants; i++) {
1992 12 struct variant *var = c->variants[i];
1993
1994
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 12 if (var->audio_group[0])
1995 ✗ add_renditions_to_variant(c, var, AVMEDIA_TYPE_AUDIO, var->audio_group);
1996
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 12 if (var->video_group[0])
1997 ✗ add_renditions_to_variant(c, var, AVMEDIA_TYPE_VIDEO, var->video_group);
1998
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 12 if (var->subtitles_group[0])
1999 ✗ add_renditions_to_variant(c, var, AVMEDIA_TYPE_SUBTITLE, var->subtitles_group);
2000 }
2001
2002 /* Create a program for each variant */
2003
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 24 for (i = 0; i < c->n_variants; i++) {
2004 12 struct variant *v = c->variants[i];
2005 AVProgram *program;
2006
2007 12 program = av_new_program(s, i);
2008
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 12 if (!program)
2009 ✗ return AVERROR(ENOMEM);
2010 12 av_dict_set_int(&program->metadata, "variant_bitrate", v->bandwidth, 0);
2011 }
2012
2013 /* Select the starting segments */
2014
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 24 for (i = 0; i < c->n_playlists; i++) {
2015 12 struct playlist *pls = c->playlists[i];
2016
2017
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 12 if (pls->n_segments == 0)
2018 ✗ continue;
2019
2020 12 pls->cur_seq_no = select_cur_seq_no(c, pls);
2021 12 highest_cur_seq_no = FFMAX(highest_cur_seq_no, pls->cur_seq_no);
2022 }
2023
2024 /* Open the demuxer for each playlist */
2025
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 24 for (i = 0; i < c->n_playlists; i++) {
2026 12 struct playlist *pls = c->playlists[i];
2027 12 const AVInputFormat *in_fmt = NULL;
2028 char *url;
2029 12 AVDictionary *options = NULL;
2030 12 struct segment *seg = NULL;
2031
2032
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 12 if (!(pls->ctx = avformat_alloc_context()))
2033 ✗ return AVERROR(ENOMEM);
2034
2035
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 12 if (pls->n_segments == 0)
2036 ✗ continue;
2037
2038 12 pls->index = i;
2039 12 pls->needed = 1;
2040 12 pls->parent = s;
2041
2042 /*
2043 * If this is a live stream and this playlist looks like it is one segment
2044 * behind, try to sync it up so that every substream starts at the same
2045 * time position (so e.g. avformat_find_stream_info() will see packets from
2046 * all active streams within the first few seconds). This is not very generic,
2047 * though, as the sequence numbers are technically independent.
2048 */
2049
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 12 if (!pls->finished && pls->cur_seq_no == highest_cur_seq_no - 1 &&
2050 ✗ highest_cur_seq_no < pls->start_seq_no + pls->n_segments) {
2051 ✗ pls->cur_seq_no = highest_cur_seq_no;
2052 }
2053
2054 12 pls->read_buffer = av_malloc(INITIAL_BUFFER_SIZE);
2055
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 12 if (!pls->read_buffer){
2056 ✗ avformat_free_context(pls->ctx);
2057 ✗ pls->ctx = NULL;
2058 ✗ return AVERROR(ENOMEM);
2059 }
2060
2061 12 ffio_init_context(&pls->pb, pls->read_buffer, INITIAL_BUFFER_SIZE, 0, pls,
2062 read_data, NULL, NULL);
2063
2064 /*
2065 * If encryption scheme is SAMPLE-AES, try to read ID3 tags of
2066 * external audio track that contains audio setup information
2067 */
2068 12 seg = current_segment(pls);
2069
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 12 if (seg && seg->key_type == KEY_SAMPLE_AES && pls->n_renditions > 0 &&
2070 ✗ pls->renditions[0]->type == AVMEDIA_TYPE_AUDIO) {
2071 uint8_t buf[HLS_MAX_ID3_TAGS_DATA_LEN];
2072 ✗ if ((ret = avio_read(&pls->pb.pub, buf, HLS_MAX_ID3_TAGS_DATA_LEN)) < 0) {
2073 /* Fail if error was not end of file */
2074 ✗ if (ret != AVERROR_EOF) {
2075 ✗ avformat_free_context(pls->ctx);
2076 ✗ pls->ctx = NULL;
2077 ✗ return ret;
2078 }
2079 }
2080 ✗ ret = 0;
2081 /* Reset reading */
2082 ✗ ff_format_io_close(pls->parent, &pls->input);
2083 ✗ pls->input = NULL;
2084 ✗ pls->input_read_done = 0;
2085 ✗ ff_format_io_close(pls->parent, &pls->input_next);
2086 ✗ pls->input_next = NULL;
2087 ✗ pls->input_next_requested = 0;
2088 ✗ pls->cur_seg_offset = 0;
2089 ✗ pls->cur_init_section = NULL;
2090 /* Reset EOF flag */
2091 ✗ pls->pb.pub.eof_reached = 0;
2092 /* Clear any buffered data */
2093 ✗ pls->pb.pub.buf_end = pls->pb.pub.buf_ptr = pls->pb.pub.buffer;
2094 /* Reset the position */
2095 ✗ pls->pb.pub.pos = 0;
2096 }
2097
2098 /*
2099 * If encryption scheme is SAMPLE-AES and audio setup information is present in external audio track,
2100 * use that information to find the media format, otherwise probe input data
2101 */
2102 12 seg = current_segment(pls);
2103
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 12 if (seg && seg->key_type == KEY_SAMPLE_AES && pls->is_id3_timestamped &&
2104 ✗ pls->audio_setup_info.codec_id != AV_CODEC_ID_NONE) {
2105 av_assert1(pls->audio_setup_info.codec_id == AV_CODEC_ID_AAC ||
2106 pls->audio_setup_info.codec_id == AV_CODEC_ID_AC3 ||
2107 pls->audio_setup_info.codec_id == AV_CODEC_ID_EAC3);
2108 // Keep this list in sync with ff_hls_senc_read_audio_setup_info()
2109 ✗ in_fmt = av_find_input_format(pls->audio_setup_info.codec_id == AV_CODEC_ID_AAC ? "aac" :
2110 ✗ pls->audio_setup_info.codec_id == AV_CODEC_ID_AC3 ? "ac3" : "eac3");
2111 } else {
2112
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 12 pls->ctx->probesize = s->probesize > 0 ? s->probesize : 1024 * 4;
2113
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 12 pls->ctx->max_analyze_duration = s->max_analyze_duration > 0 ? s->max_analyze_duration : 4 * AV_TIME_BASE;
2114 12 pls->ctx->interrupt_callback = s->interrupt_callback;
2115 12 url = av_strdup(pls->segments[0]->url);
2116 12 ret = av_probe_input_buffer(&pls->pb.pub, &in_fmt, url, NULL, 0, 0);
2117
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 12 if (ret < 0) {
2118 /* Free the ctx - it isn't initialized properly at this point,
2119 * so avformat_close_input shouldn't be called. If
2120 * avformat_open_input fails below, it frees and zeros the
2121 * context, so it doesn't need any special treatment like this. */
2122 ✗ av_log(s, AV_LOG_ERROR, "Error when loading first segment '%s'\n", url);
2123 ✗ avformat_free_context(pls->ctx);
2124 ✗ pls->ctx = NULL;
2125 ✗ av_free(url);
2126 ✗ return ret;
2127 }
2128 12 av_free(url);
2129 }
2130
2131 12 seg = current_segment(pls);
2132
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 12 if (seg && seg->key_type == KEY_SAMPLE_AES) {
2133 ✗ if (strstr(in_fmt->name, "mov")) {
2134 char key[33];
2135 ✗ ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
2136 ✗ av_dict_set(&options, "decryption_key", key, 0);
2137 ✗ } else if (!c->crypto_ctx.aes_ctx) {
2138 ✗ c->crypto_ctx.aes_ctx = av_aes_alloc();
2139 ✗ if (!c->crypto_ctx.aes_ctx) {
2140 ✗ avformat_free_context(pls->ctx);
2141 ✗ pls->ctx = NULL;
2142 ✗ return AVERROR(ENOMEM);
2143 }
2144 }
2145 }
2146
2147 12 pls->ctx->pb = &pls->pb.pub;
2148 12 pls->ctx->io_open = nested_io_open;
2149 12 pls->ctx->flags |= s->flags & ~AVFMT_FLAG_CUSTOM_IO;
2150
2151
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 12 if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
2152 ✗ return ret;
2153
2154 12 av_dict_copy(&options, c->seg_format_opts, 0);
2155
2156 12 ret = avformat_open_input(&pls->ctx, pls->segments[0]->url, in_fmt, &options);
2157 12 av_dict_free(&options);
2158
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 12 if (ret < 0)
2159 ✗ return ret;
2160
2161
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 12 if (pls->id3_deferred_extra && pls->ctx->nb_streams == 1) {
2162 ✗ ff_id3v2_parse_apic(pls->ctx, pls->id3_deferred_extra);
2163 ✗ avformat_queue_attached_pictures(pls->ctx);
2164 ✗ ff_id3v2_parse_priv(pls->ctx, pls->id3_deferred_extra);
2165 ✗ ff_id3v2_free_extra_meta(&pls->id3_deferred_extra);
2166 }
2167
2168
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 12 if (pls->is_id3_timestamped == -1)
2169 ✗ av_log(s, AV_LOG_WARNING, "No expected HTTP requests have been made\n");
2170
2171 /*
2172 * For ID3 timestamped raw audio streams we need to detect the packet
2173 * durations to calculate timestamps in fill_timing_for_id3_timestamped_stream(),
2174 * but for other streams we can rely on our user calling avformat_find_stream_info()
2175 * on us if they want to.
2176 */
2177
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 12 if (pls->is_id3_timestamped || (pls->n_renditions > 0 && pls->renditions[0]->type == AVMEDIA_TYPE_AUDIO)) {
2178 ✗ seg = current_segment(pls);
2179 ✗ if (seg && seg->key_type == KEY_SAMPLE_AES && pls->audio_setup_info.setup_data_length > 0 &&
2180 ✗ pls->ctx->nb_streams == 1)
2181 ✗ ret = ff_hls_senc_parse_audio_setup_info(pls->ctx->streams[0], &pls->audio_setup_info);
2182 else
2183 ✗ ret = avformat_find_stream_info(pls->ctx, NULL);
2184
2185 ✗ if (ret < 0)
2186 ✗ return ret;
2187 }
2188
2189 12 pls->has_noheader_flag = !!(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER);
2190
2191 /* Create new AVStreams for each stream in this playlist */
2192 12 ret = update_streams_from_subdemuxer(s, pls);
2193
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 12 if (ret < 0)
2194 ✗ return ret;
2195
2196 /*
2197 * Copy any metadata from playlist to main streams, but do not set
2198 * event flags.
2199 */
2200
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 12 if (pls->n_main_streams)
2201 12 av_dict_copy(&pls->main_streams[0]->metadata, pls->ctx->metadata, 0);
2202
2203 12 add_metadata_from_renditions(s, pls, AVMEDIA_TYPE_AUDIO);
2204 12 add_metadata_from_renditions(s, pls, AVMEDIA_TYPE_VIDEO);
2205 12 add_metadata_from_renditions(s, pls, AVMEDIA_TYPE_SUBTITLE);
2206 }
2207
2208 12 update_noheader_flag(s);
2209
2210 12 return 0;
2211 }
2212
2213 6362 static int recheck_discard_flags(AVFormatContext *s, int first)
2214 {
2215 6362 HLSContext *c = s->priv_data;
2216 6362 int i, changed = 0;
2217 int cur_needed;
2218
2219 /* Check if any new streams are needed */
2220
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 12724 for (i = 0; i < c->n_playlists; i++) {
2221 6362 struct playlist *pls = c->playlists[i];
2222
2223 6362 cur_needed = playlist_needed(c->playlists[i]);
2224
2225
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 6362 if (pls->broken) {
2226 ✗ continue;
2227 }
2228
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 6362 if (cur_needed && !pls->needed) {
2229 ✗ pls->needed = 1;
2230 ✗ changed = 1;
2231 ✗ pls->cur_seq_no = select_cur_seq_no(c, pls);
2232 ✗ pls->pb.pub.eof_reached = 0;
2233 ✗ if (c->cur_timestamp != AV_NOPTS_VALUE) {
2234 /* catch up */
2235 ✗ pls->seek_timestamp = c->cur_timestamp;
2236 ✗ pls->seek_flags = AVSEEK_FLAG_ANY;
2237 ✗ pls->seek_stream_index = -1;
2238 }
2239 ✗ av_log(s, AV_LOG_INFO, "Now receiving playlist %d, segment %"PRId64"\n", i, pls->cur_seq_no);
2240
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 6362 } else if (first && !cur_needed && pls->needed) {
2241 ✗ ff_format_io_close(pls->parent, &pls->input);
2242 ✗ pls->input_read_done = 0;
2243 ✗ ff_format_io_close(pls->parent, &pls->input_next);
2244 ✗ pls->input_next_requested = 0;
2245 ✗ pls->needed = 0;
2246 ✗ changed = 1;
2247 ✗ av_log(s, AV_LOG_INFO, "No longer receiving playlist %d\n", i);
2248 }
2249 }
2250 6362 return changed;
2251 }
2252
2253 ✗ static void fill_timing_for_id3_timestamped_stream(struct playlist *pls)
2254 {
2255 ✗ if (pls->id3_offset >= 0) {
2256 ✗ pls->pkt->dts = pls->id3_mpegts_timestamp +
2257 ✗ av_rescale_q(pls->id3_offset,
2258 ✗ pls->ctx->streams[pls->pkt->stream_index]->time_base,
2259 ✗ MPEG_TIME_BASE_Q);
2260 ✗ if (pls->pkt->duration)
2261 ✗ pls->id3_offset += pls->pkt->duration;
2262 else
2263 ✗ pls->id3_offset = -1;
2264 } else {
2265 /* there have been packets with unknown duration
2266 * since the last id3 tag, should not normally happen */
2267 ✗ pls->pkt->dts = AV_NOPTS_VALUE;
2268 }
2269
2270 ✗ if (pls->pkt->duration)
2271 ✗ pls->pkt->duration = av_rescale_q(pls->pkt->duration,
2272 ✗ pls->ctx->streams[pls->pkt->stream_index]->time_base,
2273 ✗ MPEG_TIME_BASE_Q);
2274
2275 ✗ pls->pkt->pts = AV_NOPTS_VALUE;
2276 ✗ }
2277
2278 12 static AVRational get_timebase(struct playlist *pls)
2279 {
2280
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 12 if (pls->is_id3_timestamped)
2281 ✗ return MPEG_TIME_BASE_Q;
2282
2283 12 return pls->ctx->streams[pls->pkt->stream_index]->time_base;
2284 }
2285
2286 ✗ static int compare_ts_with_wrapdetect(int64_t ts_a, struct playlist *pls_a,
2287 int64_t ts_b, struct playlist *pls_b)
2288 {
2289 ✗ int64_t scaled_ts_a = av_rescale_q(ts_a, get_timebase(pls_a), MPEG_TIME_BASE_Q);
2290 ✗ int64_t scaled_ts_b = av_rescale_q(ts_b, get_timebase(pls_b), MPEG_TIME_BASE_Q);
2291
2292 ✗ return av_compare_mod(scaled_ts_a, scaled_ts_b, 1LL << 33);
2293 }
2294
2295 6362 static int hls_read_packet(AVFormatContext *s, AVPacket *pkt)
2296 {
2297 6362 HLSContext *c = s->priv_data;
2298 6362 int ret, i, minplaylist = -1;
2299
2300 6362 recheck_discard_flags(s, c->first_packet);
2301 6362 c->first_packet = 0;
2302
2303
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 12724 for (i = 0; i < c->n_playlists; i++) {
2304 6362 struct playlist *pls = c->playlists[i];
2305 /* Make sure we've got one buffered packet from each open playlist
2306 * stream */
2307
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 6362 if (pls->needed && !pls->pkt->data) {
2308 ✗ while (1) {
2309 int64_t ts_diff;
2310 AVRational tb;
2311 6362 struct segment *seg = NULL;
2312 6362 ret = av_read_frame(pls->ctx, pls->pkt);
2313
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 6362 if (ret < 0) {
2314
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 11 if (!avio_feof(&pls->pb.pub) && ret != AVERROR_EOF)
2315 ✗ return ret;
2316 6362 break;
2317 } else {
2318 /* stream_index check prevents matching picture attachments etc. */
2319
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 6351 if (pls->is_id3_timestamped && pls->pkt->stream_index == 0) {
2320 /* audio elementary streams are id3 timestamped */
2321 ✗ fill_timing_for_id3_timestamped_stream(pls);
2322 }
2323
2324
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 6351 if (c->first_timestamp == AV_NOPTS_VALUE &&
2325
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 12 pls->pkt->dts != AV_NOPTS_VALUE)
2326 12 c->first_timestamp = av_rescale_q(pls->pkt->dts,
2327 12 get_timebase(pls), AV_TIME_BASE_Q);
2328 }
2329
2330 6351 seg = current_segment(pls);
2331
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 6351 if (seg && seg->key_type == KEY_SAMPLE_AES && !strstr(pls->ctx->iformat->name, "mov")) {
2332 ✗ enum AVCodecID codec_id = pls->ctx->streams[pls->pkt->stream_index]->codecpar->codec_id;
2333 ✗ memcpy(c->crypto_ctx.iv, seg->iv, sizeof(seg->iv));
2334 ✗ memcpy(c->crypto_ctx.key, pls->key, sizeof(pls->key));
2335 ✗ ff_hls_senc_decrypt_frame(codec_id, &c->crypto_ctx, pls->pkt);
2336 }
2337
2338
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 6351 if (pls->seek_timestamp == AV_NOPTS_VALUE)
2339 6351 break;
2340
2341 ✗ if (pls->seek_stream_index < 0 ||
2342 ✗ pls->seek_stream_index == pls->pkt->stream_index) {
2343
2344 ✗ if (pls->pkt->dts == AV_NOPTS_VALUE) {
2345 ✗ pls->seek_timestamp = AV_NOPTS_VALUE;
2346 ✗ break;
2347 }
2348
2349 ✗ tb = get_timebase(pls);
2350 ✗ ts_diff = av_rescale_rnd(pls->pkt->dts, AV_TIME_BASE,
2351 ✗ tb.den, AV_ROUND_DOWN) -
2352 ✗ pls->seek_timestamp;
2353 ✗ if (ts_diff >= 0 && (pls->seek_flags & AVSEEK_FLAG_ANY ||
2354 ✗ pls->pkt->flags & AV_PKT_FLAG_KEY)) {
2355 ✗ pls->seek_timestamp = AV_NOPTS_VALUE;
2356 ✗ break;
2357 }
2358 }
2359 ✗ av_packet_unref(pls->pkt);
2360 }
2361 }
2362 /* Check if this stream has the packet with the lowest dts */
2363
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 6362 if (pls->pkt->data) {
2364 6351 struct playlist *minpls = minplaylist < 0 ?
2365
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 6351 NULL : c->playlists[minplaylist];
2366
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 6351 if (minplaylist < 0) {
2367 6351 minplaylist = i;
2368 } else {
2369 ✗ int64_t dts = pls->pkt->dts;
2370 ✗ int64_t mindts = minpls->pkt->dts;
2371
2372 ✗ if (dts == AV_NOPTS_VALUE ||
2373 ✗ (mindts != AV_NOPTS_VALUE && compare_ts_with_wrapdetect(dts, pls, mindts, minpls) < 0))
2374 ✗ minplaylist = i;
2375 }
2376 }
2377 }
2378
2379 /* If we got a packet, return it */
2380
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 6362 if (minplaylist >= 0) {
2381 6351 struct playlist *pls = c->playlists[minplaylist];
2382 AVStream *ist;
2383 AVStream *st;
2384
2385 6351 ret = update_streams_from_subdemuxer(s, pls);
2386
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 6351 if (ret < 0) {
2387 ✗ av_packet_unref(pls->pkt);
2388 ✗ return ret;
2389 }
2390
2391 // If sub-demuxer reports updated metadata, copy it to the first stream
2392 // and set its AVSTREAM_EVENT_FLAG_METADATA_UPDATED flag.
2393
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 6351 if (pls->ctx->event_flags & AVFMT_EVENT_FLAG_METADATA_UPDATED) {
2394 ✗ if (pls->n_main_streams) {
2395 ✗ st = pls->main_streams[0];
2396 ✗ av_dict_copy(&st->metadata, pls->ctx->metadata, 0);
2397 ✗ st->event_flags |= AVSTREAM_EVENT_FLAG_METADATA_UPDATED;
2398 }
2399 ✗ pls->ctx->event_flags &= ~AVFMT_EVENT_FLAG_METADATA_UPDATED;
2400 }
2401
2402 /* check if noheader flag has been cleared by the subdemuxer */
2403
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 6351 if (pls->has_noheader_flag && !(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER)) {
2404 11 pls->has_noheader_flag = 0;
2405 11 update_noheader_flag(s);
2406 }
2407
2408
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 6351 if (pls->pkt->stream_index >= pls->n_main_streams) {
2409 ✗ av_log(s, AV_LOG_ERROR, "stream index inconsistency: index %d, %d main streams, %d subdemuxer streams\n",
2410 ✗ pls->pkt->stream_index, pls->n_main_streams, pls->ctx->nb_streams);
2411 ✗ av_packet_unref(pls->pkt);
2412 ✗ return AVERROR_BUG;
2413 }
2414
2415 6351 ist = pls->ctx->streams[pls->pkt->stream_index];
2416 6351 st = pls->main_streams[pls->pkt->stream_index];
2417
2418 6351 av_packet_move_ref(pkt, pls->pkt);
2419 6351 pkt->stream_index = st->index;
2420
2421
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 6351 if (pkt->dts != AV_NOPTS_VALUE)
2422 6351 c->cur_timestamp = av_rescale_q(pkt->dts,
2423 ist->time_base,
2424 6351 AV_TIME_BASE_Q);
2425
2426 /* There may be more situations where this would be useful, but this at least
2427 * handles newly probed codecs properly (i.e. request_probe by mpegts). */
2428
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 6351 if (ist->codecpar->codec_id != st->codecpar->codec_id) {
2429 10 ret = set_stream_info_from_input_stream(st, pls, ist);
2430
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 10 if (ret < 0) {
2431 ✗ return ret;
2432 }
2433 }
2434
2435 6351 return 0;
2436 }
2437 11 return AVERROR_EOF;
2438 }
2439
2440 ✗ static int hls_read_seek(AVFormatContext *s, int stream_index,
2441 int64_t timestamp, int flags)
2442 {
2443 ✗ HLSContext *c = s->priv_data;
2444 ✗ struct playlist *seek_pls = NULL;
2445 int i, j;
2446 int stream_subdemuxer_index;
2447 int64_t first_timestamp, seek_timestamp, duration;
2448 int64_t seq_no, seg_start_ts;
2449
2450 ✗ if ((flags & AVSEEK_FLAG_BYTE) || (c->ctx->ctx_flags & AVFMTCTX_UNSEEKABLE))
2451 ✗ return AVERROR(ENOSYS);
2452
2453 ✗ first_timestamp = c->first_timestamp == AV_NOPTS_VALUE ?
2454 ✗ 0 : c->first_timestamp;
2455
2456 ✗ seek_timestamp = av_rescale_rnd(timestamp, AV_TIME_BASE,
2457 ✗ s->streams[stream_index]->time_base.den,
2458 AV_ROUND_DOWN);
2459
2460 ✗ duration = s->duration == AV_NOPTS_VALUE ?
2461 ✗ 0 : s->duration;
2462
2463 ✗ if (0 < duration && duration < seek_timestamp - first_timestamp)
2464 ✗ return AVERROR(EIO);
2465
2466 /* find the playlist with the specified stream */
2467 ✗ for (i = 0; i < c->n_playlists; i++) {
2468 ✗ struct playlist *pls = c->playlists[i];
2469 ✗ for (j = 0; j < pls->n_main_streams; j++) {
2470 ✗ if (pls->main_streams[j] == s->streams[stream_index]) {
2471 ✗ seek_pls = pls;
2472 ✗ stream_subdemuxer_index = j;
2473 ✗ break;
2474 }
2475 }
2476 }
2477 /* check if the timestamp is valid for the playlist with the
2478 * specified stream index */
2479 ✗ if (!seek_pls || !find_timestamp_in_playlist(c, seek_pls, seek_timestamp, &seq_no, &seg_start_ts))
2480 ✗ return AVERROR(EIO);
2481
2482 ✗ if (s->streams[stream_index]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
2483 ✗ flags & AVSEEK_FLAG_BACKWARD && !(flags & AVSEEK_FLAG_ANY)) {
2484 /* Seeking to start of segment ensures we seek to a keyframe located
2485 * before the given timestamp. */
2486 ✗ seek_timestamp = seg_start_ts;
2487 }
2488
2489 /* set segment now so we do not need to search again below */
2490 ✗ seek_pls->cur_seq_no = seq_no;
2491 ✗ seek_pls->seek_stream_index = stream_subdemuxer_index;
2492
2493 ✗ for (i = 0; i < c->n_playlists; i++) {
2494 /* Reset reading */
2495 ✗ struct playlist *pls = c->playlists[i];
2496 ✗ AVIOContext *const pb = &pls->pb.pub;
2497 ✗ ff_format_io_close(pls->parent, &pls->input);
2498 ✗ pls->input_read_done = 0;
2499 ✗ ff_format_io_close(pls->parent, &pls->input_next);
2500 ✗ pls->input_next_requested = 0;
2501 ✗ av_packet_unref(pls->pkt);
2502 ✗ pb->eof_reached = 0;
2503 /* Clear any buffered data */
2504 ✗ pb->buf_end = pb->buf_ptr = pb->buffer;
2505 /* Reset the pos, to let the mpegts/mov demuxer know we've seeked. */
2506 ✗ pb->pos = 0;
2507 /* Flush the packet queue of the subdemuxer. */
2508 ✗ ff_read_frame_flush(pls->ctx);
2509
2510 /* Reset the init segment so it's re-fetched and served appropiately */
2511 ✗ pls->cur_init_section = NULL;
2512
2513 ✗ pls->seek_timestamp = seek_timestamp;
2514 ✗ pls->seek_flags = flags;
2515
2516 ✗ if (pls != seek_pls) {
2517 /* set closest segment seq_no for playlists not handled above */
2518 ✗ find_timestamp_in_playlist(c, pls, seek_timestamp, &pls->cur_seq_no, NULL);
2519 /* seek the playlist to the given position without taking
2520 * keyframes into account since this playlist does not have the
2521 * specified stream where we should look for the keyframes */
2522 ✗ pls->seek_stream_index = -1;
2523 ✗ pls->seek_flags |= AVSEEK_FLAG_ANY;
2524 }
2525 }
2526
2527 ✗ c->cur_timestamp = seek_timestamp;
2528
2529 ✗ return 0;
2530 }
2531
2532 7186 static int hls_probe(const AVProbeData *p)
2533 {
2534 /* Require #EXTM3U at the start, and either one of the ones below
2535 * somewhere for a proper match. */
2536
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 7186 if (strncmp(p->buf, "#EXTM3U", 7))
2537 7174 return 0;
2538
2539
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 12 if (strstr(p->buf, "#EXT-X-STREAM-INF:") ||
2540
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 12 strstr(p->buf, "#EXT-X-TARGETDURATION:") ||
2541 ✗ strstr(p->buf, "#EXT-X-MEDIA-SEQUENCE:")) {
2542
2543
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 12 int mime_ok = p->mime_type && !(
2544 ✗ av_strcasecmp(p->mime_type, "application/vnd.apple.mpegurl") &&
2545 ✗ av_strcasecmp(p->mime_type, "audio/mpegurl")
2546 );
2547
2548
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 12 int mime_x = p->mime_type && !(
2549 ✗ av_strcasecmp(p->mime_type, "audio/x-mpegurl") &&
2550 ✗ av_strcasecmp(p->mime_type, "application/x-mpegurl")
2551 );
2552
2553
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 12 if (!mime_ok &&
2554
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 12 !mime_x &&
2555
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 12 !av_match_ext (p->filename, "m3u8,m3u") &&
2556 ✗ ff_match_url_ext(p->filename, "m3u8,m3u") <= 0) {
2557 ✗ av_log(NULL, AV_LOG_ERROR, "Not detecting m3u8/hls with non standard extension and non standard mime type\n");
2558 ✗ return 0;
2559 }
2560
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 12 if (mime_x)
2561 ✗ av_log(NULL, AV_LOG_WARNING, "mime type is not rfc8216 compliant\n");
2562
2563 12 return AVPROBE_SCORE_MAX;
2564 }
2565 ✗ return 0;
2566 }
2567
2568 #define OFFSET(x) offsetof(HLSContext, x)
2569 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2570 static const AVOption hls_options[] = {
2571 {"live_start_index", "segment index to start live streams at (negative values are from the end)",
2572 OFFSET(live_start_index), AV_OPT_TYPE_INT, {.i64 = -3}, INT_MIN, INT_MAX, FLAGS},
2573 {"prefer_x_start", "prefer to use #EXT-X-START if it's in playlist instead of live_start_index",
2574 OFFSET(prefer_x_start), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS},
2575 {"allowed_extensions", "List of file extensions that hls is allowed to access",
2576 OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2577 {.str = "3gp,aac,avi,ac3,eac3,flac,mkv,m3u8,m4a,m4s,m4v,mpg,mov,mp2,mp3,mp4,mpeg,mpegts,ogg,ogv,oga,ts,vob,wav"},
2578 INT_MIN, INT_MAX, FLAGS},
2579 {"max_reload", "Maximum number of times a insufficient list is attempted to be reloaded",
2580 OFFSET(max_reload), AV_OPT_TYPE_INT, {.i64 = 3}, 0, INT_MAX, FLAGS},
2581 {"m3u8_hold_counters", "The maximum number of times to load m3u8 when it refreshes without new segments",
2582 OFFSET(m3u8_hold_counters), AV_OPT_TYPE_INT, {.i64 = 1000}, 0, INT_MAX, FLAGS},
2583 {"http_persistent", "Use persistent HTTP connections",
2584 OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
2585 {"http_multiple", "Use multiple HTTP connections for fetching segments",
2586 OFFSET(http_multiple), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, FLAGS},
2587 {"http_seekable", "Use HTTP partial requests, 0 = disable, 1 = enable, -1 = auto",
2588 OFFSET(http_seekable), AV_OPT_TYPE_BOOL, { .i64 = -1}, -1, 1, FLAGS},
2589 {"seg_format_options", "Set options for segment demuxer",
2590 OFFSET(seg_format_opts), AV_OPT_TYPE_DICT, {.str = NULL}, 0, 0, FLAGS},
2591 {"seg_max_retry", "Maximum number of times to reload a segment on error.",
2592 OFFSET(seg_max_retry), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS},
2593 {NULL}
2594 };
2595
2596 static const AVClass hls_class = {
2597 .class_name = "hls demuxer",
2598 .item_name = av_default_item_name,
2599 .option = hls_options,
2600 .version = LIBAVUTIL_VERSION_INT,
2601 };
2602
2603 const FFInputFormat ff_hls_demuxer = {
2604 .p.name = "hls",
2605 .p.long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
2606 .p.priv_class = &hls_class,
2607 .p.flags = AVFMT_NOGENSEARCH | AVFMT_TS_DISCONT | AVFMT_NO_BYTE_SEEK,
2608 .priv_data_size = sizeof(HLSContext),
2609 .flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
2610 .read_probe = hls_probe,
2611 .read_header = hls_read_header,
2612 .read_packet = hls_read_packet,
2613 .read_close = hls_close,
2614 .read_seek = hls_read_seek,
2615 };
2616