FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/hls.c
Date: 2023-12-04 05:51:44
Exec Total Coverage
Lines: 563 1363 41.3%
Functions: 32 48 66.7%
Branches: 296 968 30.6%
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/opt.h"
39 #include "libavutil/dict.h"
40 #include "libavutil/time.h"
41 #include "avformat.h"
42 #include "demux.h"
43 #include "internal.h"
44 #include "avio_internal.h"
45 #include "id3v2.h"
46 #include "url.h"
47
48 #include "hls_sample_encryption.h"
49
50 #define INITIAL_BUFFER_SIZE 32768
51
52 #define MAX_FIELD_LEN 64
53 #define MAX_CHARACTERISTICS_LEN 512
54
55 #define MPEG_TIME_BASE 90000
56 #define MPEG_TIME_BASE_Q (AVRational){1, MPEG_TIME_BASE}
57
58 /*
59 * An apple http stream consists of a playlist with media segment files,
60 * played sequentially. There may be several playlists with the same
61 * video content, in different bandwidth variants, that are played in
62 * parallel (preferably only one bandwidth variant at a time). In this case,
63 * the user supplied the url to a main playlist that only lists the variant
64 * playlists.
65 *
66 * If the main playlist doesn't point at any variants, we still create
67 * one anonymous toplevel variant for this, to maintain the structure.
68 */
69
70 enum KeyType {
71 KEY_NONE,
72 KEY_AES_128,
73 KEY_SAMPLE_AES
74 };
75
76 struct segment {
77 int64_t duration;
78 int64_t url_offset;
79 int64_t size;
80 char *url;
81 char *key;
82 enum KeyType key_type;
83 uint8_t iv[16];
84 /* associated Media Initialization Section, treated as a segment */
85 struct segment *init_section;
86 };
87
88 struct rendition;
89
90 enum PlaylistType {
91 PLS_TYPE_UNSPECIFIED,
92 PLS_TYPE_EVENT,
93 PLS_TYPE_VOD
94 };
95
96 /*
97 * Each playlist has its own demuxer. If it currently is active,
98 * it has an open AVIOContext too, and potentially an AVPacket
99 * containing the next packet from this stream.
100 */
101 struct playlist {
102 char url[MAX_URL_SIZE];
103 FFIOContext pb;
104 uint8_t* read_buffer;
105 AVIOContext *input;
106 int input_read_done;
107 AVIOContext *input_next;
108 int input_next_requested;
109 AVFormatContext *parent;
110 int index;
111 AVFormatContext *ctx;
112 AVPacket *pkt;
113 int has_noheader_flag;
114
115 /* main demuxer streams associated with this playlist
116 * indexed by the subdemuxer stream indexes */
117 AVStream **main_streams;
118 int n_main_streams;
119
120 int finished;
121 enum PlaylistType type;
122 int64_t target_duration;
123 int64_t start_seq_no;
124 int time_offset_flag;
125 int64_t start_time_offset;
126 int n_segments;
127 struct segment **segments;
128 int needed;
129 int broken;
130 int64_t cur_seq_no;
131 int64_t last_seq_no;
132 int m3u8_hold_counters;
133 int64_t cur_seg_offset;
134 int64_t last_load_time;
135
136 /* Currently active Media Initialization Section */
137 struct segment *cur_init_section;
138 uint8_t *init_sec_buf;
139 unsigned int init_sec_buf_size;
140 unsigned int init_sec_data_len;
141 unsigned int init_sec_buf_read_offset;
142
143 char key_url[MAX_URL_SIZE];
144 uint8_t key[16];
145
146 /* ID3 timestamp handling (elementary audio streams have ID3 timestamps
147 * (and possibly other ID3 tags) in the beginning of each segment) */
148 int is_id3_timestamped; /* -1: not yet known */
149 int64_t id3_mpegts_timestamp; /* in mpegts tb */
150 int64_t id3_offset; /* in stream original tb */
151 uint8_t* id3_buf; /* temp buffer for id3 parsing */
152 unsigned int id3_buf_size;
153 AVDictionary *id3_initial; /* data from first id3 tag */
154 int id3_found; /* ID3 tag found at some point */
155 int id3_changed; /* ID3 tag data has changed at some point */
156 ID3v2ExtraMeta *id3_deferred_extra; /* stored here until subdemuxer is opened */
157
158 HLSAudioSetupInfo audio_setup_info;
159
160 int64_t seek_timestamp;
161 int seek_flags;
162 int seek_stream_index; /* into subdemuxer stream array */
163
164 /* Renditions associated with this playlist, if any.
165 * Alternative rendition playlists have a single rendition associated
166 * with them, and variant main Media Playlists may have
167 * multiple (playlist-less) renditions associated with them. */
168 int n_renditions;
169 struct rendition **renditions;
170
171 /* Media Initialization Sections (EXT-X-MAP) associated with this
172 * playlist, if any. */
173 int n_init_sections;
174 struct segment **init_sections;
175 };
176
177 /*
178 * Renditions are e.g. alternative subtitle or audio streams.
179 * The rendition may either be an external playlist or it may be
180 * contained in the main Media Playlist of the variant (in which case
181 * playlist is NULL).
182 */
183 struct rendition {
184 enum AVMediaType type;
185 struct playlist *playlist;
186 char group_id[MAX_FIELD_LEN];
187 char language[MAX_FIELD_LEN];
188 char name[MAX_FIELD_LEN];
189 int disposition;
190 };
191
192 struct variant {
193 int bandwidth;
194
195 /* every variant contains at least the main Media Playlist in index 0 */
196 int n_playlists;
197 struct playlist **playlists;
198
199 char audio_group[MAX_FIELD_LEN];
200 char video_group[MAX_FIELD_LEN];
201 char subtitles_group[MAX_FIELD_LEN];
202 };
203
204 typedef struct HLSContext {
205 AVClass *class;
206 AVFormatContext *ctx;
207 int n_variants;
208 struct variant **variants;
209 int n_playlists;
210 struct playlist **playlists;
211 int n_renditions;
212 struct rendition **renditions;
213
214 int64_t cur_seq_no;
215 int m3u8_hold_counters;
216 int live_start_index;
217 int prefer_x_start;
218 int first_packet;
219 int64_t first_timestamp;
220 int64_t cur_timestamp;
221 AVIOInterruptCB *interrupt_callback;
222 AVDictionary *avio_opts;
223 AVDictionary *seg_format_opts;
224 char *allowed_extensions;
225 int max_reload;
226 int http_persistent;
227 int http_multiple;
228 int http_seekable;
229 int seg_max_retry;
230 AVIOContext *playlist_pb;
231 HLSCryptoContext crypto_ctx;
232 } HLSContext;
233
234 12 static void free_segment_dynarray(struct segment **segments, int n_segments)
235 {
236 int i;
237
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 77 for (i = 0; i < n_segments; i++) {
238 65 av_freep(&segments[i]->key);
239 65 av_freep(&segments[i]->url);
240 65 av_freep(&segments[i]);
241 }
242 12 }
243
244 12 static void free_segment_list(struct playlist *pls)
245 {
246 12 free_segment_dynarray(pls->segments, pls->n_segments);
247 12 av_freep(&pls->segments);
248 12 pls->n_segments = 0;
249 12 }
250
251 12 static void free_init_section_list(struct playlist *pls)
252 {
253 int i;
254
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 12 for (i = 0; i < pls->n_init_sections; i++) {
255 ✗ av_freep(&pls->init_sections[i]->key);
256 ✗ av_freep(&pls->init_sections[i]->url);
257 ✗ av_freep(&pls->init_sections[i]);
258 }
259 12 av_freep(&pls->init_sections);
260 12 pls->n_init_sections = 0;
261 12 }
262
263 12 static void free_playlist_list(HLSContext *c)
264 {
265 int i;
266
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 24 for (i = 0; i < c->n_playlists; i++) {
267 12 struct playlist *pls = c->playlists[i];
268 12 free_segment_list(pls);
269 12 free_init_section_list(pls);
270 12 av_freep(&pls->main_streams);
271 12 av_freep(&pls->renditions);
272 12 av_freep(&pls->id3_buf);
273 12 av_dict_free(&pls->id3_initial);
274 12 ff_id3v2_free_extra_meta(&pls->id3_deferred_extra);
275 12 av_freep(&pls->init_sec_buf);
276 12 av_packet_free(&pls->pkt);
277 12 av_freep(&pls->pb.pub.buffer);
278 12 ff_format_io_close(c->ctx, &pls->input);
279 12 pls->input_read_done = 0;
280 12 ff_format_io_close(c->ctx, &pls->input_next);
281 12 pls->input_next_requested = 0;
282
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 12 if (pls->ctx) {
283 12 pls->ctx->pb = NULL;
284 12 avformat_close_input(&pls->ctx);
285 }
286 12 av_free(pls);
287 }
288 12 av_freep(&c->playlists);
289 12 c->n_playlists = 0;
290 12 }
291
292 12 static void free_variant_list(HLSContext *c)
293 {
294 int i;
295
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 24 for (i = 0; i < c->n_variants; i++) {
296 12 struct variant *var = c->variants[i];
297 12 av_freep(&var->playlists);
298 12 av_free(var);
299 }
300 12 av_freep(&c->variants);
301 12 c->n_variants = 0;
302 12 }
303
304 12 static void free_rendition_list(HLSContext *c)
305 {
306 int i;
307
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 12 for (i = 0; i < c->n_renditions; i++)
308 ✗ av_freep(&c->renditions[i]);
309 12 av_freep(&c->renditions);
310 12 c->n_renditions = 0;
311 12 }
312
313 12 static struct playlist *new_playlist(HLSContext *c, const char *url,
314 const char *base)
315 {
316 12 struct playlist *pls = av_mallocz(sizeof(struct playlist));
317
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 12 if (!pls)
318 ✗ return NULL;
319 12 pls->pkt = av_packet_alloc();
320
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 12 if (!pls->pkt) {
321 ✗ av_free(pls);
322 ✗ return NULL;
323 }
324 12 ff_make_absolute_url(pls->url, sizeof(pls->url), base, url);
325
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 12 if (!pls->url[0]) {
326 ✗ av_packet_free(&pls->pkt);
327 ✗ av_free(pls);
328 ✗ return NULL;
329 }
330 12 pls->seek_timestamp = AV_NOPTS_VALUE;
331
332 12 pls->is_id3_timestamped = -1;
333 12 pls->id3_mpegts_timestamp = AV_NOPTS_VALUE;
334
335 12 dynarray_add(&c->playlists, &c->n_playlists, pls);
336 12 return pls;
337 }
338
339 struct variant_info {
340 char bandwidth[20];
341 /* variant group ids: */
342 char audio[MAX_FIELD_LEN];
343 char video[MAX_FIELD_LEN];
344 char subtitles[MAX_FIELD_LEN];
345 };
346
347 12 static struct variant *new_variant(HLSContext *c, struct variant_info *info,
348 const char *url, const char *base)
349 {
350 struct variant *var;
351 struct playlist *pls;
352
353 12 pls = new_playlist(c, url, base);
354
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 12 if (!pls)
355 ✗ return NULL;
356
357 12 var = av_mallocz(sizeof(struct variant));
358
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 12 if (!var)
359 ✗ return NULL;
360
361
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 12 if (info) {
362 ✗ var->bandwidth = atoi(info->bandwidth);
363 ✗ strcpy(var->audio_group, info->audio);
364 ✗ strcpy(var->video_group, info->video);
365 ✗ strcpy(var->subtitles_group, info->subtitles);
366 }
367
368 12 dynarray_add(&c->variants, &c->n_variants, var);
369 12 dynarray_add(&var->playlists, &var->n_playlists, pls);
370 12 return var;
371 }
372
373 ✗ static void handle_variant_args(struct variant_info *info, const char *key,
374 int key_len, char **dest, int *dest_len)
375 {
376 ✗ if (!strncmp(key, "BANDWIDTH=", key_len)) {
377 ✗ *dest = info->bandwidth;
378 ✗ *dest_len = sizeof(info->bandwidth);
379 ✗ } else if (!strncmp(key, "AUDIO=", key_len)) {
380 ✗ *dest = info->audio;
381 ✗ *dest_len = sizeof(info->audio);
382 ✗ } else if (!strncmp(key, "VIDEO=", key_len)) {
383 ✗ *dest = info->video;
384 ✗ *dest_len = sizeof(info->video);
385 ✗ } else if (!strncmp(key, "SUBTITLES=", key_len)) {
386 ✗ *dest = info->subtitles;
387 ✗ *dest_len = sizeof(info->subtitles);
388 }
389 ✗ }
390
391 struct key_info {
392 char uri[MAX_URL_SIZE];
393 char method[11];
394 char iv[35];
395 };
396
397 ✗ static void handle_key_args(struct key_info *info, const char *key,
398 int key_len, char **dest, int *dest_len)
399 {
400 ✗ if (!strncmp(key, "METHOD=", key_len)) {
401 ✗ *dest = info->method;
402 ✗ *dest_len = sizeof(info->method);
403 ✗ } else if (!strncmp(key, "URI=", key_len)) {
404 ✗ *dest = info->uri;
405 ✗ *dest_len = sizeof(info->uri);
406 ✗ } else if (!strncmp(key, "IV=", key_len)) {
407 ✗ *dest = info->iv;
408 ✗ *dest_len = sizeof(info->iv);
409 }
410 ✗ }
411
412 struct init_section_info {
413 char uri[MAX_URL_SIZE];
414 char byterange[32];
415 };
416
417 ✗ static struct segment *new_init_section(struct playlist *pls,
418 struct init_section_info *info,
419 const char *url_base)
420 {
421 struct segment *sec;
422 ✗ char tmp_str[MAX_URL_SIZE], *ptr = tmp_str;
423
424 ✗ if (!info->uri[0])
425 ✗ return NULL;
426
427 ✗ sec = av_mallocz(sizeof(*sec));
428 ✗ if (!sec)
429 ✗ return NULL;
430
431 ✗ if (!av_strncasecmp(info->uri, "data:", 5)) {
432 ✗ ptr = info->uri;
433 } else {
434 ✗ ff_make_absolute_url(tmp_str, sizeof(tmp_str), url_base, info->uri);
435 ✗ if (!tmp_str[0]) {
436 ✗ av_free(sec);
437 ✗ return NULL;
438 }
439 }
440 ✗ sec->url = av_strdup(ptr);
441 ✗ if (!sec->url) {
442 ✗ av_free(sec);
443 ✗ return NULL;
444 }
445
446 ✗ if (info->byterange[0]) {
447 ✗ sec->size = strtoll(info->byterange, NULL, 10);
448 ✗ ptr = strchr(info->byterange, '@');
449 ✗ if (ptr)
450 ✗ sec->url_offset = strtoll(ptr+1, NULL, 10);
451 } else {
452 /* the entire file is the init section */
453 ✗ sec->size = -1;
454 }
455
456 ✗ dynarray_add(&pls->init_sections, &pls->n_init_sections, sec);
457
458 ✗ return sec;
459 }
460
461 ✗ static void handle_init_section_args(struct init_section_info *info, const char *key,
462 int key_len, char **dest, int *dest_len)
463 {
464 ✗ if (!strncmp(key, "URI=", key_len)) {
465 ✗ *dest = info->uri;
466 ✗ *dest_len = sizeof(info->uri);
467 ✗ } else if (!strncmp(key, "BYTERANGE=", key_len)) {
468 ✗ *dest = info->byterange;
469 ✗ *dest_len = sizeof(info->byterange);
470 }
471 ✗ }
472
473 struct rendition_info {
474 char type[16];
475 char uri[MAX_URL_SIZE];
476 char group_id[MAX_FIELD_LEN];
477 char language[MAX_FIELD_LEN];
478 char assoc_language[MAX_FIELD_LEN];
479 char name[MAX_FIELD_LEN];
480 char defaultr[4];
481 char forced[4];
482 char characteristics[MAX_CHARACTERISTICS_LEN];
483 };
484
485 ✗ static struct rendition *new_rendition(HLSContext *c, struct rendition_info *info,
486 const char *url_base)
487 {
488 struct rendition *rend;
489 ✗ enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
490 char *characteristic;
491 char *chr_ptr;
492 char *saveptr;
493
494 ✗ if (!strcmp(info->type, "AUDIO"))
495 ✗ type = AVMEDIA_TYPE_AUDIO;
496 ✗ else if (!strcmp(info->type, "VIDEO"))
497 ✗ type = AVMEDIA_TYPE_VIDEO;
498 ✗ else if (!strcmp(info->type, "SUBTITLES"))
499 ✗ type = AVMEDIA_TYPE_SUBTITLE;
500 ✗ else if (!strcmp(info->type, "CLOSED-CAPTIONS"))
501 /* CLOSED-CAPTIONS is ignored since we do not support CEA-608 CC in
502 * AVC SEI RBSP anyway */
503 ✗ return NULL;
504
505 ✗ if (type == AVMEDIA_TYPE_UNKNOWN) {
506 ✗ av_log(c->ctx, AV_LOG_WARNING, "Can't support the type: %s\n", info->type);
507 ✗ return NULL;
508 }
509
510 /* URI is mandatory for subtitles as per spec */
511 ✗ if (type == AVMEDIA_TYPE_SUBTITLE && !info->uri[0]) {
512 ✗ av_log(c->ctx, AV_LOG_ERROR, "The URI tag is REQUIRED for subtitle.\n");
513 ✗ return NULL;
514 }
515
516 /* TODO: handle subtitles (each segment has to parsed separately) */
517 ✗ if (c->ctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL)
518 ✗ if (type == AVMEDIA_TYPE_SUBTITLE) {
519 ✗ av_log(c->ctx, AV_LOG_WARNING, "Can't support the subtitle(uri: %s)\n", info->uri);
520 ✗ return NULL;
521 }
522
523 ✗ rend = av_mallocz(sizeof(struct rendition));
524 ✗ if (!rend)
525 ✗ return NULL;
526
527 ✗ dynarray_add(&c->renditions, &c->n_renditions, rend);
528
529 ✗ rend->type = type;
530 ✗ strcpy(rend->group_id, info->group_id);
531 ✗ strcpy(rend->language, info->language);
532 ✗ strcpy(rend->name, info->name);
533
534 /* add the playlist if this is an external rendition */
535 ✗ if (info->uri[0]) {
536 ✗ rend->playlist = new_playlist(c, info->uri, url_base);
537 ✗ if (rend->playlist)
538 ✗ dynarray_add(&rend->playlist->renditions,
539 &rend->playlist->n_renditions, rend);
540 }
541
542 ✗ if (info->assoc_language[0]) {
543 ✗ int langlen = strlen(rend->language);
544 ✗ if (langlen < sizeof(rend->language) - 3) {
545 ✗ rend->language[langlen] = ',';
546 ✗ strncpy(rend->language + langlen + 1, info->assoc_language,
547 sizeof(rend->language) - langlen - 2);
548 }
549 }
550
551 ✗ if (!strcmp(info->defaultr, "YES"))
552 ✗ rend->disposition |= AV_DISPOSITION_DEFAULT;
553 ✗ if (!strcmp(info->forced, "YES"))
554 ✗ rend->disposition |= AV_DISPOSITION_FORCED;
555
556 ✗ chr_ptr = info->characteristics;
557 ✗ while ((characteristic = av_strtok(chr_ptr, ",", &saveptr))) {
558 ✗ if (!strcmp(characteristic, "public.accessibility.describes-music-and-sound"))
559 ✗ rend->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
560 ✗ else if (!strcmp(characteristic, "public.accessibility.describes-video"))
561 ✗ rend->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
562
563 ✗ chr_ptr = NULL;
564 }
565
566 ✗ return rend;
567 }
568
569 ✗ static void handle_rendition_args(struct rendition_info *info, const char *key,
570 int key_len, char **dest, int *dest_len)
571 {
572 ✗ if (!strncmp(key, "TYPE=", key_len)) {
573 ✗ *dest = info->type;
574 ✗ *dest_len = sizeof(info->type);
575 ✗ } else if (!strncmp(key, "URI=", key_len)) {
576 ✗ *dest = info->uri;
577 ✗ *dest_len = sizeof(info->uri);
578 ✗ } else if (!strncmp(key, "GROUP-ID=", key_len)) {
579 ✗ *dest = info->group_id;
580 ✗ *dest_len = sizeof(info->group_id);
581 ✗ } else if (!strncmp(key, "LANGUAGE=", key_len)) {
582 ✗ *dest = info->language;
583 ✗ *dest_len = sizeof(info->language);
584 ✗ } else if (!strncmp(key, "ASSOC-LANGUAGE=", key_len)) {
585 ✗ *dest = info->assoc_language;
586 ✗ *dest_len = sizeof(info->assoc_language);
587 ✗ } else if (!strncmp(key, "NAME=", key_len)) {
588 ✗ *dest = info->name;
589 ✗ *dest_len = sizeof(info->name);
590 ✗ } else if (!strncmp(key, "DEFAULT=", key_len)) {
591 ✗ *dest = info->defaultr;
592 ✗ *dest_len = sizeof(info->defaultr);
593 ✗ } else if (!strncmp(key, "FORCED=", key_len)) {
594 ✗ *dest = info->forced;
595 ✗ *dest_len = sizeof(info->forced);
596 ✗ } else if (!strncmp(key, "CHARACTERISTICS=", key_len)) {
597 ✗ *dest = info->characteristics;
598 ✗ *dest_len = sizeof(info->characteristics);
599 }
600 /*
601 * ignored:
602 * - AUTOSELECT: client may autoselect based on e.g. system language
603 * - INSTREAM-ID: EIA-608 closed caption number ("CC1".."CC4")
604 */
605 ✗ }
606
607 /* used by parse_playlist to allocate a new variant+playlist when the
608 * playlist is detected to be a Media Playlist (not Master Playlist)
609 * and we have no parent Master Playlist (parsing of which would have
610 * allocated the variant and playlist already)
611 * *pls == NULL => Master Playlist or parentless Media Playlist
612 * *pls != NULL => parented Media Playlist, playlist+variant allocated */
613 89 static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
614 {
615
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 89 if (*pls)
616 77 return 0;
617
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 12 if (!new_variant(c, NULL, url, NULL))
618 ✗ return AVERROR(ENOMEM);
619 12 *pls = c->playlists[c->n_playlists - 1];
620 12 return 0;
621 }
622
623 ✗ static int open_url_keepalive(AVFormatContext *s, AVIOContext **pb,
624 const char *url, AVDictionary **options)
625 {
626 #if !CONFIG_HTTP_PROTOCOL
627 return AVERROR_PROTOCOL_NOT_FOUND;
628 #else
629 int ret;
630 ✗ URLContext *uc = ffio_geturlcontext(*pb);
631 ✗ av_assert0(uc);
632 ✗ (*pb)->eof_reached = 0;
633 ✗ ret = ff_http_do_new_request2(uc, url, options);
634 ✗ if (ret < 0) {
635 ✗ ff_format_io_close(s, pb);
636 }
637 ✗ return ret;
638 #endif
639 }
640
641 61 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
642 AVDictionary **opts, AVDictionary *opts2, int *is_http_out)
643 {
644 61 HLSContext *c = s->priv_data;
645 61 AVDictionary *tmp = NULL;
646 61 const char *proto_name = NULL;
647 int ret;
648 61 int is_http = 0;
649
650
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 61 if (av_strstart(url, "crypto", NULL)) {
651 ✗ if (url[6] == '+' || url[6] == ':')
652 ✗ proto_name = avio_find_protocol_name(url + 7);
653
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 61 } else if (av_strstart(url, "data", NULL)) {
654 ✗ if (url[4] == '+' || url[4] == ':')
655 ✗ proto_name = avio_find_protocol_name(url + 5);
656 }
657
658
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 61 if (!proto_name)
659 61 proto_name = avio_find_protocol_name(url);
660
661
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 61 if (!proto_name)
662 ✗ return AVERROR_INVALIDDATA;
663
664 // only http(s) & file are allowed
665
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 61 if (av_strstart(proto_name, "file", NULL)) {
666
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 61 if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
667 ✗ av_log(s, AV_LOG_ERROR,
668 "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
669 "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
670 url);
671 ✗ return AVERROR_INVALIDDATA;
672 }
673 ✗ } else if (av_strstart(proto_name, "http", NULL)) {
674 ✗ is_http = 1;
675 ✗ } else if (av_strstart(proto_name, "data", NULL)) {
676 ;
677 } else
678 ✗ return AVERROR_INVALIDDATA;
679
680
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 61 if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
681 ;
682
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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)] == ':')
683 ;
684
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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)] == ':')
685 ;
686
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 61 else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
687 ✗ return AVERROR_INVALIDDATA;
688
689 61 av_dict_copy(&tmp, *opts, 0);
690 61 av_dict_copy(&tmp, opts2, 0);
691
692
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 61 if (is_http && c->http_persistent && *pb) {
693 ✗ ret = open_url_keepalive(c->ctx, pb, url, &tmp);
694 ✗ if (ret == AVERROR_EXIT) {
695 ✗ av_dict_free(&tmp);
696 ✗ return ret;
697 ✗ } else if (ret < 0) {
698 ✗ if (ret != AVERROR_EOF)
699 ✗ av_log(s, AV_LOG_WARNING,
700 "keepalive request failed for '%s' with error: '%s' when opening url, retrying with new connection\n",
701 ✗ url, av_err2str(ret));
702 ✗ av_dict_copy(&tmp, *opts, 0);
703 ✗ av_dict_copy(&tmp, opts2, 0);
704 ✗ ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
705 }
706 } else {
707 61 ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
708 }
709
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 61 if (ret >= 0) {
710 // update cookies on http response with setcookies.
711 61 char *new_cookies = NULL;
712
713
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 61 if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
714 61 av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
715
716
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 61 if (new_cookies)
717 ✗ av_dict_set(opts, "cookies", new_cookies, AV_DICT_DONT_STRDUP_VAL);
718 }
719
720 61 av_dict_free(&tmp);
721
722
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 61 if (is_http_out)
723 61 *is_http_out = is_http;
724
725 61 return ret;
726 }
727
728 12 static int parse_playlist(HLSContext *c, const char *url,
729 struct playlist *pls, AVIOContext *in)
730 {
731 12 int ret = 0, is_segment = 0, is_variant = 0;
732 12 int64_t duration = 0;
733 12 enum KeyType key_type = KEY_NONE;
734 12 uint8_t iv[16] = "";
735 12 int has_iv = 0;
736 12 char key[MAX_URL_SIZE] = "";
737 char line[MAX_URL_SIZE];
738 const char *ptr;
739 12 int close_in = 0;
740 12 int64_t seg_offset = 0;
741 12 int64_t seg_size = -1;
742 12 uint8_t *new_url = NULL;
743 struct variant_info variant_info;
744 char tmp_str[MAX_URL_SIZE];
745 12 struct segment *cur_init_section = NULL;
746 12 int is_http = av_strstart(url, "http", NULL);
747 12 struct segment **prev_segments = NULL;
748 12 int prev_n_segments = 0;
749 12 int64_t prev_start_seq_no = -1;
750
751
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 12 if (is_http && !in && c->http_persistent && c->playlist_pb) {
752 ✗ in = c->playlist_pb;
753 ✗ ret = open_url_keepalive(c->ctx, &c->playlist_pb, url, NULL);
754 ✗ if (ret == AVERROR_EXIT) {
755 ✗ return ret;
756 ✗ } else if (ret < 0) {
757 ✗ if (ret != AVERROR_EOF)
758 ✗ av_log(c->ctx, AV_LOG_WARNING,
759 "keepalive request failed for '%s' with error: '%s' when parsing playlist\n",
760 ✗ url, av_err2str(ret));
761 ✗ in = NULL;
762 }
763 }
764
765
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 12 if (!in) {
766 ✗ AVDictionary *opts = NULL;
767 ✗ av_dict_copy(&opts, c->avio_opts, 0);
768
769 ✗ if (c->http_persistent)
770 ✗ av_dict_set(&opts, "multiple_requests", "1", 0);
771
772 ✗ ret = c->ctx->io_open(c->ctx, &in, url, AVIO_FLAG_READ, &opts);
773 ✗ av_dict_free(&opts);
774 ✗ if (ret < 0)
775 ✗ return ret;
776
777 ✗ if (is_http && c->http_persistent)
778 ✗ c->playlist_pb = in;
779 else
780 ✗ close_in = 1;
781 }
782
783
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 12 if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0)
784 ✗ url = new_url;
785
786 12 ff_get_chomp_line(in, line, sizeof(line));
787
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 12 if (strcmp(line, "#EXTM3U")) {
788 ✗ ret = AVERROR_INVALIDDATA;
789 ✗ goto fail;
790 }
791
792
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 12 if (pls) {
793 ✗ prev_start_seq_no = pls->start_seq_no;
794 ✗ prev_segments = pls->segments;
795 ✗ prev_n_segments = pls->n_segments;
796 ✗ pls->segments = NULL;
797 ✗ pls->n_segments = 0;
798
799 ✗ pls->finished = 0;
800 ✗ pls->type = PLS_TYPE_UNSPECIFIED;
801 }
802
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 225 while (!avio_feof(in)) {
803 213 ff_get_chomp_line(in, line, sizeof(line));
804
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 213 if (av_strstart(line, "#EXT-X-STREAM-INF:", &ptr)) {
805 ✗ is_variant = 1;
806 ✗ memset(&variant_info, 0, sizeof(variant_info));
807 ✗ ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_variant_args,
808 &variant_info);
809
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 213 } else if (av_strstart(line, "#EXT-X-KEY:", &ptr)) {
810 ✗ struct key_info info = {{0}};
811 ✗ ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_key_args,
812 &info);
813 ✗ key_type = KEY_NONE;
814 ✗ has_iv = 0;
815 ✗ if (!strcmp(info.method, "AES-128"))
816 ✗ key_type = KEY_AES_128;
817 ✗ if (!strcmp(info.method, "SAMPLE-AES"))
818 ✗ key_type = KEY_SAMPLE_AES;
819 ✗ if (!av_strncasecmp(info.iv, "0x", 2)) {
820 ✗ ff_hex_to_data(iv, info.iv + 2);
821 ✗ has_iv = 1;
822 }
823 ✗ av_strlcpy(key, info.uri, sizeof(key));
824
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 213 } else if (av_strstart(line, "#EXT-X-MEDIA:", &ptr)) {
825 ✗ struct rendition_info info = {{0}};
826 ✗ ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_rendition_args,
827 &info);
828 ✗ new_rendition(c, &info, url);
829
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 213 } else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
830 int64_t t;
831 12 ret = ensure_playlist(c, &pls, url);
832
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 12 if (ret < 0)
833 ✗ goto fail;
834 12 t = strtoll(ptr, NULL, 10);
835
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 12 if (t < 0 || t >= INT64_MAX / AV_TIME_BASE) {
836 ✗ ret = AVERROR_INVALIDDATA;
837 ✗ goto fail;
838 }
839 12 pls->target_duration = t * AV_TIME_BASE;
840
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 201 } else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
841 uint64_t seq_no;
842 12 ret = ensure_playlist(c, &pls, url);
843
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 12 if (ret < 0)
844 ✗ goto fail;
845 12 seq_no = strtoull(ptr, NULL, 10);
846
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 12 if (seq_no > INT64_MAX/2) {
847 ✗ av_log(c->ctx, AV_LOG_DEBUG, "MEDIA-SEQUENCE higher than "
848 "INT64_MAX/2, mask out the highest bit\n");
849 ✗ seq_no &= INT64_MAX/2;
850 }
851 12 pls->start_seq_no = seq_no;
852
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 189 } else if (av_strstart(line, "#EXT-X-PLAYLIST-TYPE:", &ptr)) {
853 ✗ ret = ensure_playlist(c, &pls, url);
854 ✗ if (ret < 0)
855 ✗ goto fail;
856 ✗ if (!strcmp(ptr, "EVENT"))
857 ✗ pls->type = PLS_TYPE_EVENT;
858 ✗ else if (!strcmp(ptr, "VOD"))
859 ✗ pls->type = PLS_TYPE_VOD;
860
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 189 } else if (av_strstart(line, "#EXT-X-MAP:", &ptr)) {
861 ✗ struct init_section_info info = {{0}};
862 ✗ ret = ensure_playlist(c, &pls, url);
863 ✗ if (ret < 0)
864 ✗ goto fail;
865 ✗ ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_init_section_args,
866 &info);
867 ✗ cur_init_section = new_init_section(pls, &info, url);
868 ✗ if (!cur_init_section) {
869 ✗ ret = AVERROR(ENOMEM);
870 ✗ goto fail;
871 }
872 ✗ cur_init_section->key_type = key_type;
873 ✗ if (has_iv) {
874 ✗ memcpy(cur_init_section->iv, iv, sizeof(iv));
875 } else {
876 ✗ int64_t seq = pls->start_seq_no + pls->n_segments;
877 ✗ memset(cur_init_section->iv, 0, sizeof(cur_init_section->iv));
878 ✗ AV_WB64(cur_init_section->iv + 8, seq);
879 }
880
881 ✗ if (key_type != KEY_NONE) {
882 ✗ ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
883 ✗ if (!tmp_str[0]) {
884 ✗ av_free(cur_init_section);
885 ✗ ret = AVERROR_INVALIDDATA;
886 ✗ goto fail;
887 }
888 ✗ cur_init_section->key = av_strdup(tmp_str);
889 ✗ if (!cur_init_section->key) {
890 ✗ av_free(cur_init_section);
891 ✗ ret = AVERROR(ENOMEM);
892 ✗ goto fail;
893 }
894 } else {
895 ✗ cur_init_section->key = NULL;
896 }
897
898
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 189 } else if (av_strstart(line, "#EXT-X-START:", &ptr)) {
899 ✗ const char *time_offset_value = NULL;
900 ✗ ret = ensure_playlist(c, &pls, url);
901 ✗ if (ret < 0) {
902 ✗ goto fail;
903 }
904 ✗ if (av_strstart(ptr, "TIME-OFFSET=", &time_offset_value)) {
905 ✗ float offset = strtof(time_offset_value, NULL);
906 ✗ pls->start_time_offset = offset * AV_TIME_BASE;
907 ✗ pls->time_offset_flag = 1;
908 } else {
909 ✗ av_log(c->ctx, AV_LOG_WARNING, "#EXT-X-START value is"
910 "invalid, it will be ignored");
911 ✗ continue;
912 }
913
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 189 } else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
914
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 11 if (pls)
915 11 pls->finished = 1;
916
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 178 } else if (av_strstart(line, "#EXTINF:", &ptr)) {
917 65 is_segment = 1;
918 65 duration = atof(ptr) * AV_TIME_BASE;
919
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 113 } else if (av_strstart(line, "#EXT-X-BYTERANGE:", &ptr)) {
920 20 seg_size = strtoll(ptr, NULL, 10);
921 20 ptr = strchr(ptr, '@');
922
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 20 if (ptr)
923 20 seg_offset = strtoll(ptr+1, NULL, 10);
924
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 93 } else if (av_strstart(line, "#", NULL)) {
925 16 av_log(c->ctx, AV_LOG_INFO, "Skip ('%s')\n", line);
926 16 continue;
927
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 77 } else if (line[0]) {
928
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 65 if (is_variant) {
929 ✗ if (!new_variant(c, &variant_info, line, url)) {
930 ✗ ret = AVERROR(ENOMEM);
931 ✗ goto fail;
932 }
933 ✗ is_variant = 0;
934 }
935
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 65 if (is_segment) {
936 struct segment *seg;
937 65 ret = ensure_playlist(c, &pls, url);
938
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 65 if (ret < 0)
939 ✗ goto fail;
940 65 seg = av_malloc(sizeof(struct segment));
941
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 65 if (!seg) {
942 ✗ ret = AVERROR(ENOMEM);
943 ✗ goto fail;
944 }
945
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 65 if (has_iv) {
946 ✗ memcpy(seg->iv, iv, sizeof(iv));
947 } else {
948 65 uint64_t seq = pls->start_seq_no + (uint64_t)pls->n_segments;
949 65 memset(seg->iv, 0, sizeof(seg->iv));
950 65 AV_WB64(seg->iv + 8, seq);
951 }
952
953
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 65 if (key_type != KEY_NONE) {
954 ✗ ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
955 ✗ if (!tmp_str[0]) {
956 ✗ ret = AVERROR_INVALIDDATA;
957 ✗ av_free(seg);
958 ✗ goto fail;
959 }
960 ✗ seg->key = av_strdup(tmp_str);
961 ✗ if (!seg->key) {
962 ✗ av_free(seg);
963 ✗ ret = AVERROR(ENOMEM);
964 ✗ goto fail;
965 }
966 } else {
967 65 seg->key = NULL;
968 }
969
970 65 ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, line);
971
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 65 if (!tmp_str[0]) {
972 ✗ ret = AVERROR_INVALIDDATA;
973 ✗ if (seg->key)
974 ✗ av_free(seg->key);
975 ✗ av_free(seg);
976 ✗ goto fail;
977 }
978 65 seg->url = av_strdup(tmp_str);
979
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 65 if (!seg->url) {
980 ✗ av_free(seg->key);
981 ✗ av_free(seg);
982 ✗ ret = AVERROR(ENOMEM);
983 ✗ goto fail;
984 }
985
986
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 65 if (duration < 0.001 * AV_TIME_BASE) {
987 ✗ av_log(c->ctx, AV_LOG_WARNING, "Cannot get correct #EXTINF value of segment %s,"
988 " set to default value to 1ms.\n", seg->url);
989 ✗ duration = 0.001 * AV_TIME_BASE;
990 }
991 65 seg->duration = duration;
992 65 seg->key_type = key_type;
993 65 dynarray_add(&pls->segments, &pls->n_segments, seg);
994 65 is_segment = 0;
995
996 65 seg->size = seg_size;
997
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 65 if (seg_size >= 0) {
998 20 seg->url_offset = seg_offset;
999 20 seg_offset += seg_size;
1000 20 seg_size = -1;
1001 } else {
1002 45 seg->url_offset = 0;
1003 45 seg_offset = 0;
1004 }
1005
1006 65 seg->init_section = cur_init_section;
1007 }
1008 }
1009 }
1010
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 12 if (prev_segments) {
1011 ✗ if (pls->start_seq_no > prev_start_seq_no && c->first_timestamp != AV_NOPTS_VALUE) {
1012 ✗ int64_t prev_timestamp = c->first_timestamp;
1013 int i;
1014 ✗ int64_t diff = pls->start_seq_no - prev_start_seq_no;
1015 ✗ for (i = 0; i < prev_n_segments && i < diff; i++) {
1016 ✗ c->first_timestamp += prev_segments[i]->duration;
1017 }
1018 ✗ av_log(c->ctx, AV_LOG_DEBUG, "Media sequence change (%"PRId64" -> %"PRId64")"
1019 " reflected in first_timestamp: %"PRId64" -> %"PRId64"\n",
1020 ✗ prev_start_seq_no, pls->start_seq_no,
1021 prev_timestamp, c->first_timestamp);
1022 ✗ } else if (pls->start_seq_no < prev_start_seq_no) {
1023 ✗ av_log(c->ctx, AV_LOG_WARNING, "Media sequence changed unexpectedly: %"PRId64" -> %"PRId64"\n",
1024 ✗ prev_start_seq_no, pls->start_seq_no);
1025 }
1026 ✗ free_segment_dynarray(prev_segments, prev_n_segments);
1027 ✗ av_freep(&prev_segments);
1028 }
1029
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 12 if (pls)
1030 12 pls->last_load_time = av_gettime_relative();
1031
1032 ✗ fail:
1033 12 av_free(new_url);
1034
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 12 if (close_in)
1035 ✗ ff_format_io_close(c->ctx, &in);
1036 12 c->ctx->ctx_flags = c->ctx->ctx_flags & ~(unsigned)AVFMTCTX_UNSEEKABLE;
1037
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 12 if (!c->n_variants || !c->variants[0]->n_playlists ||
1038
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 12 !(c->variants[0]->playlists[0]->finished ||
1039
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 1 c->variants[0]->playlists[0]->type == PLS_TYPE_EVENT))
1040 1 c->ctx->ctx_flags |= AVFMTCTX_UNSEEKABLE;
1041 12 return ret;
1042 }
1043
1044 6784 static struct segment *current_segment(struct playlist *pls)
1045 {
1046 6784 int64_t n = pls->cur_seq_no - pls->start_seq_no;
1047
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 6784 if (n >= pls->n_segments)
1048 2 return NULL;
1049 6782 return pls->segments[n];
1050 }
1051
1052 366 static struct segment *next_segment(struct playlist *pls)
1053 {
1054 366 int64_t n = pls->cur_seq_no - pls->start_seq_no + 1;
1055
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 366 if (n >= pls->n_segments)
1056 72 return NULL;
1057 294 return pls->segments[n];
1058 }
1059
1060 366 static int read_from_url(struct playlist *pls, struct segment *seg,
1061 uint8_t *buf, int buf_size)
1062 {
1063 int ret;
1064
1065 /* limit read if the segment was only a part of a file */
1066
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 366 if (seg->size >= 0)
1067 100 buf_size = FFMIN(buf_size, seg->size - pls->cur_seg_offset);
1068
1069 366 ret = avio_read(pls->input, buf, buf_size);
1070
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 366 if (ret > 0)
1071 307 pls->cur_seg_offset += ret;
1072
1073 366 return ret;
1074 }
1075
1076 /* Parse the raw ID3 data and pass contents to caller */
1077 ✗ static void parse_id3(AVFormatContext *s, AVIOContext *pb,
1078 AVDictionary **metadata, int64_t *dts, HLSAudioSetupInfo *audio_setup_info,
1079 ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
1080 {
1081 static const char id3_priv_owner_ts[] = "com.apple.streaming.transportStreamTimestamp";
1082 static const char id3_priv_owner_audio_setup[] = "com.apple.streaming.audioDescription";
1083 ID3v2ExtraMeta *meta;
1084
1085 ✗ ff_id3v2_read_dict(pb, metadata, ID3v2_DEFAULT_MAGIC, extra_meta);
1086 ✗ for (meta = *extra_meta; meta; meta = meta->next) {
1087 ✗ if (!strcmp(meta->tag, "PRIV")) {
1088 ✗ ID3v2ExtraMetaPRIV *priv = &meta->data.priv;
1089 ✗ if (priv->datasize == 8 && !av_strncasecmp(priv->owner, id3_priv_owner_ts, 44)) {
1090 /* 33-bit MPEG timestamp */
1091 ✗ int64_t ts = AV_RB64(priv->data);
1092 ✗ av_log(s, AV_LOG_DEBUG, "HLS ID3 audio timestamp %"PRId64"\n", ts);
1093 ✗ if ((ts & ~((1ULL << 33) - 1)) == 0)
1094 ✗ *dts = ts;
1095 else
1096 ✗ av_log(s, AV_LOG_ERROR, "Invalid HLS ID3 audio timestamp %"PRId64"\n", ts);
1097 ✗ } else if (priv->datasize >= 8 && !av_strncasecmp(priv->owner, id3_priv_owner_audio_setup, 36)) {
1098 ✗ ff_hls_senc_read_audio_setup_info(audio_setup_info, priv->data, priv->datasize);
1099 }
1100 ✗ } else if (!strcmp(meta->tag, "APIC") && apic)
1101 ✗ *apic = &meta->data.apic;
1102 }
1103 ✗ }
1104
1105 /* Check if the ID3 metadata contents have changed */
1106 ✗ static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata,
1107 ID3v2ExtraMetaAPIC *apic)
1108 {
1109 ✗ const AVDictionaryEntry *entry = NULL;
1110 const AVDictionaryEntry *oldentry;
1111 /* check that no keys have changed values */
1112 ✗ while ((entry = av_dict_iterate(metadata, entry))) {
1113 ✗ oldentry = av_dict_get(pls->id3_initial, entry->key, NULL, AV_DICT_MATCH_CASE);
1114 ✗ if (!oldentry || strcmp(oldentry->value, entry->value) != 0)
1115 ✗ return 1;
1116 }
1117
1118 /* check if apic appeared */
1119 ✗ if (apic && (pls->ctx->nb_streams != 2 || !pls->ctx->streams[1]->attached_pic.data))
1120 ✗ return 1;
1121
1122 ✗ if (apic) {
1123 ✗ int size = pls->ctx->streams[1]->attached_pic.size;
1124 ✗ if (size != apic->buf->size - AV_INPUT_BUFFER_PADDING_SIZE)
1125 ✗ return 1;
1126
1127 ✗ if (memcmp(apic->buf->data, pls->ctx->streams[1]->attached_pic.data, size) != 0)
1128 ✗ return 1;
1129 }
1130
1131 ✗ return 0;
1132 }
1133
1134 /* Parse ID3 data and handle the found data */
1135 ✗ static void handle_id3(AVIOContext *pb, struct playlist *pls)
1136 {
1137 ✗ AVDictionary *metadata = NULL;
1138 ✗ ID3v2ExtraMetaAPIC *apic = NULL;
1139 ✗ ID3v2ExtraMeta *extra_meta = NULL;
1140 ✗ int64_t timestamp = AV_NOPTS_VALUE;
1141
1142 ✗ parse_id3(pls->ctx, pb, &metadata, &timestamp, &pls->audio_setup_info, &apic, &extra_meta);
1143
1144 ✗ if (timestamp != AV_NOPTS_VALUE) {
1145 ✗ pls->id3_mpegts_timestamp = timestamp;
1146 ✗ pls->id3_offset = 0;
1147 }
1148
1149 ✗ if (!pls->id3_found) {
1150 /* initial ID3 tags */
1151 ✗ av_assert0(!pls->id3_deferred_extra);
1152 ✗ pls->id3_found = 1;
1153
1154 /* get picture attachment and set text metadata */
1155 ✗ if (pls->ctx->nb_streams)
1156 ✗ ff_id3v2_parse_apic(pls->ctx, extra_meta);
1157 else
1158 /* demuxer not yet opened, defer picture attachment */
1159 ✗ pls->id3_deferred_extra = extra_meta;
1160
1161 ✗ ff_id3v2_parse_priv_dict(&metadata, extra_meta);
1162 ✗ av_dict_copy(&pls->ctx->metadata, metadata, 0);
1163 ✗ pls->id3_initial = metadata;
1164
1165 } else {
1166 ✗ if (!pls->id3_changed && id3_has_changed_values(pls, metadata, apic)) {
1167 ✗ avpriv_report_missing_feature(pls->parent, "Changing ID3 metadata in HLS audio elementary stream");
1168 ✗ pls->id3_changed = 1;
1169 }
1170 ✗ av_dict_free(&metadata);
1171 }
1172
1173 ✗ if (!pls->id3_deferred_extra)
1174 ✗ ff_id3v2_free_extra_meta(&extra_meta);
1175 ✗ }
1176
1177 12 static void intercept_id3(struct playlist *pls, uint8_t *buf,
1178 int buf_size, int *len)
1179 {
1180 /* intercept id3 tags, we do not want to pass them to the raw
1181 * demuxer on all segment switches */
1182 int bytes;
1183 12 int id3_buf_pos = 0;
1184 12 int fill_buf = 0;
1185 12 struct segment *seg = current_segment(pls);
1186
1187 /* gather all the id3 tags */
1188 while (1) {
1189 /* see if we can retrieve enough data for ID3 header */
1190
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 12 if (*len < ID3v2_HEADER_SIZE && buf_size >= ID3v2_HEADER_SIZE) {
1191 ✗ bytes = read_from_url(pls, seg, buf + *len, ID3v2_HEADER_SIZE - *len);
1192 ✗ if (bytes > 0) {
1193
1194 ✗ if (bytes == ID3v2_HEADER_SIZE - *len)
1195 /* no EOF yet, so fill the caller buffer again after
1196 * we have stripped the ID3 tags */
1197 ✗ fill_buf = 1;
1198
1199 ✗ *len += bytes;
1200
1201 ✗ } else if (*len <= 0) {
1202 /* error/EOF */
1203 ✗ *len = bytes;
1204 ✗ fill_buf = 0;
1205 }
1206 }
1207
1208
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 12 if (*len < ID3v2_HEADER_SIZE)
1209 ✗ break;
1210
1211
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 12 if (ff_id3v2_match(buf, ID3v2_DEFAULT_MAGIC)) {
1212 ✗ int64_t maxsize = seg->size >= 0 ? seg->size : 1024*1024;
1213 ✗ int taglen = ff_id3v2_tag_len(buf);
1214 ✗ int tag_got_bytes = FFMIN(taglen, *len);
1215 ✗ int remaining = taglen - tag_got_bytes;
1216
1217 ✗ if (taglen > maxsize) {
1218 ✗ av_log(pls->parent, AV_LOG_ERROR, "Too large HLS ID3 tag (%d > %"PRId64" bytes)\n",
1219 taglen, maxsize);
1220 ✗ break;
1221 }
1222
1223 /*
1224 * Copy the id3 tag to our temporary id3 buffer.
1225 * We could read a small id3 tag directly without memcpy, but
1226 * we would still need to copy the large tags, and handling
1227 * both of those cases together with the possibility for multiple
1228 * tags would make the handling a bit complex.
1229 */
1230 ✗ pls->id3_buf = av_fast_realloc(pls->id3_buf, &pls->id3_buf_size, id3_buf_pos + taglen);
1231 ✗ if (!pls->id3_buf)
1232 ✗ break;
1233 ✗ memcpy(pls->id3_buf + id3_buf_pos, buf, tag_got_bytes);
1234 ✗ id3_buf_pos += tag_got_bytes;
1235
1236 /* strip the intercepted bytes */
1237 ✗ *len -= tag_got_bytes;
1238 ✗ memmove(buf, buf + tag_got_bytes, *len);
1239 ✗ av_log(pls->parent, AV_LOG_DEBUG, "Stripped %d HLS ID3 bytes\n", tag_got_bytes);
1240
1241 ✗ if (remaining > 0) {
1242 /* read the rest of the tag in */
1243 ✗ if (read_from_url(pls, seg, pls->id3_buf + id3_buf_pos, remaining) != remaining)
1244 ✗ break;
1245 ✗ id3_buf_pos += remaining;
1246 ✗ av_log(pls->parent, AV_LOG_DEBUG, "Stripped additional %d HLS ID3 bytes\n", remaining);
1247 }
1248
1249 } else {
1250 /* no more ID3 tags */
1251 12 break;
1252 }
1253 }
1254
1255 /* re-fill buffer for the caller unless EOF */
1256
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 12 if (*len >= 0 && (fill_buf || *len == 0)) {
1257 ✗ bytes = read_from_url(pls, seg, buf + *len, buf_size - *len);
1258
1259 /* ignore error if we already had some data */
1260 ✗ if (bytes >= 0)
1261 ✗ *len += bytes;
1262 ✗ else if (*len == 0)
1263 ✗ *len = bytes;
1264 }
1265
1266
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 12 if (pls->id3_buf) {
1267 /* Now parse all the ID3 tags */
1268 FFIOContext id3ioctx;
1269 ✗ ffio_init_read_context(&id3ioctx, pls->id3_buf, id3_buf_pos);
1270 ✗ handle_id3(&id3ioctx.pub, pls);
1271 }
1272
1273
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 12 if (pls->is_id3_timestamped == -1)
1274 12 pls->is_id3_timestamped = (pls->id3_mpegts_timestamp != AV_NOPTS_VALUE);
1275 12 }
1276
1277 61 static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg, AVIOContext **in)
1278 {
1279 61 AVDictionary *opts = NULL;
1280 int ret;
1281 61 int is_http = 0;
1282
1283
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 61 if (c->http_persistent)
1284 61 av_dict_set(&opts, "multiple_requests", "1", 0);
1285
1286
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 61 if (seg->size >= 0) {
1287 /* try to restrict the HTTP request to the part we want
1288 * (if this is in fact a HTTP request) */
1289 20 av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1290 20 av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1291 }
1292
1293 61 av_log(pls->parent, AV_LOG_VERBOSE, "HLS request for url '%s', offset %"PRId64", playlist %d\n",
1294 seg->url, seg->url_offset, pls->index);
1295
1296
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 61 if (seg->key_type == KEY_AES_128 || seg->key_type == KEY_SAMPLE_AES) {
1297 ✗ if (strcmp(seg->key, pls->key_url)) {
1298 ✗ AVIOContext *pb = NULL;
1299 ✗ if (open_url(pls->parent, &pb, seg->key, &c->avio_opts, opts, NULL) == 0) {
1300 ✗ ret = avio_read(pb, pls->key, sizeof(pls->key));
1301 ✗ if (ret != sizeof(pls->key)) {
1302 ✗ av_log(pls->parent, AV_LOG_ERROR, "Unable to read key file %s\n",
1303 seg->key);
1304 }
1305 ✗ ff_format_io_close(pls->parent, &pb);
1306 } else {
1307 ✗ av_log(pls->parent, AV_LOG_ERROR, "Unable to open key file %s\n",
1308 seg->key);
1309 }
1310 ✗ av_strlcpy(pls->key_url, seg->key, sizeof(pls->key_url));
1311 }
1312 }
1313
1314
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 61 if (seg->key_type == KEY_AES_128) {
1315 char iv[33], key[33], url[MAX_URL_SIZE];
1316 ✗ ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
1317 ✗ ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
1318 ✗ if (strstr(seg->url, "://"))
1319 ✗ snprintf(url, sizeof(url), "crypto+%s", seg->url);
1320 else
1321 ✗ snprintf(url, sizeof(url), "crypto:%s", seg->url);
1322
1323 ✗ av_dict_set(&opts, "key", key, 0);
1324 ✗ av_dict_set(&opts, "iv", iv, 0);
1325
1326 ✗ ret = open_url(pls->parent, in, url, &c->avio_opts, opts, &is_http);
1327 ✗ if (ret < 0) {
1328 ✗ goto cleanup;
1329 }
1330 ✗ ret = 0;
1331 } else {
1332 61 ret = open_url(pls->parent, in, seg->url, &c->avio_opts, opts, &is_http);
1333 }
1334
1335 /* Seek to the requested position. If this was a HTTP request, the offset
1336 * should already be where want it to, but this allows e.g. local testing
1337 * without a HTTP server.
1338 *
1339 * This is not done for HTTP at all as avio_seek() does internal bookkeeping
1340 * of file offset which is out-of-sync with the actual offset when "offset"
1341 * AVOption is used with http protocol, causing the seek to not be a no-op
1342 * as would be expected. Wrong offset received from the server will not be
1343 * noticed without the call, though.
1344 */
1345
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 61 if (ret == 0 && !is_http && seg->url_offset) {
1346 15 int64_t seekret = avio_seek(*in, seg->url_offset, SEEK_SET);
1347
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 15 if (seekret < 0) {
1348 ✗ av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of HLS segment '%s'\n", seg->url_offset, seg->url);
1349 ✗ ret = seekret;
1350 ✗ ff_format_io_close(pls->parent, in);
1351 }
1352 }
1353
1354 61 cleanup:
1355 61 av_dict_free(&opts);
1356 61 pls->cur_seg_offset = 0;
1357 61 return ret;
1358 }
1359
1360 61 static int update_init_section(struct playlist *pls, struct segment *seg)
1361 {
1362 static const int max_init_section_size = 1024*1024;
1363 61 HLSContext *c = pls->parent->priv_data;
1364 int64_t sec_size;
1365 int64_t urlsize;
1366 int ret;
1367
1368
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 61 if (seg->init_section == pls->cur_init_section)
1369 61 return 0;
1370
1371 ✗ pls->cur_init_section = NULL;
1372
1373 ✗ if (!seg->init_section)
1374 ✗ return 0;
1375
1376 ✗ ret = open_input(c, pls, seg->init_section, &pls->input);
1377 ✗ if (ret < 0) {
1378 ✗ av_log(pls->parent, AV_LOG_WARNING,
1379 "Failed to open an initialization section in playlist %d\n",
1380 pls->index);
1381 ✗ return ret;
1382 }
1383
1384 ✗ if (seg->init_section->size >= 0)
1385 ✗ sec_size = seg->init_section->size;
1386 ✗ else if ((urlsize = avio_size(pls->input)) >= 0)
1387 ✗ sec_size = urlsize;
1388 else
1389 ✗ sec_size = max_init_section_size;
1390
1391 ✗ av_log(pls->parent, AV_LOG_DEBUG,
1392 "Downloading an initialization section of size %"PRId64"\n",
1393 sec_size);
1394
1395 ✗ sec_size = FFMIN(sec_size, max_init_section_size);
1396
1397 ✗ av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1398
1399 ✗ ret = read_from_url(pls, seg->init_section, pls->init_sec_buf,
1400 ✗ pls->init_sec_buf_size);
1401 ✗ ff_format_io_close(pls->parent, &pls->input);
1402
1403 ✗ if (ret < 0)
1404 ✗ return ret;
1405
1406 ✗ pls->cur_init_section = seg->init_section;
1407 ✗ pls->init_sec_data_len = ret;
1408 ✗ pls->init_sec_buf_read_offset = 0;
1409
1410 /* spec says audio elementary streams do not have media initialization
1411 * sections, so there should be no ID3 timestamps */
1412 ✗ pls->is_id3_timestamped = 0;
1413
1414 ✗ return 0;
1415 }
1416
1417 93 static int64_t default_reload_interval(struct playlist *pls)
1418 {
1419 93 return pls->n_segments > 0 ?
1420
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 93 pls->segments[pls->n_segments - 1]->duration :
1421 pls->target_duration;
1422 }
1423
1424 6436 static int playlist_needed(struct playlist *pls)
1425 {
1426 6436 AVFormatContext *s = pls->parent;
1427 int i, j;
1428 6436 int stream_needed = 0;
1429 int first_st;
1430
1431 /* If there is no context or streams yet, the playlist is needed */
1432
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 6436 if (!pls->ctx || !pls->n_main_streams)
1433 12 return 1;
1434
1435 /* check if any of the streams in the playlist are needed */
1436
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 6424 for (i = 0; i < pls->n_main_streams; i++) {
1437
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 6424 if (pls->main_streams[i]->discard < AVDISCARD_ALL) {
1438 6424 stream_needed = 1;
1439 6424 break;
1440 }
1441 }
1442
1443 /* If all streams in the playlist were discarded, the playlist is not
1444 * needed (regardless of whether whole programs are discarded or not). */
1445
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 6424 if (!stream_needed)
1446 ✗ return 0;
1447
1448 /* Otherwise, check if all the programs (variants) this playlist is in are
1449 * discarded. Since all streams in the playlist are part of the same programs
1450 * we can just check the programs of the first stream. */
1451
1452 6424 first_st = pls->main_streams[0]->index;
1453
1454
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 6424 for (i = 0; i < s->nb_programs; i++) {
1455 6424 AVProgram *program = s->programs[i];
1456
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 6424 if (program->discard < AVDISCARD_ALL) {
1457
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 6424 for (j = 0; j < program->nb_stream_indexes; j++) {
1458
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 6424 if (program->stream_index[j] == first_st) {
1459 /* playlist is in an undiscarded program */
1460 6424 return 1;
1461 }
1462 }
1463 }
1464 }
1465
1466 /* some streams were not discarded but all the programs were */
1467 ✗ return 0;
1468 }
1469
1470 339 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1471 {
1472 339 struct playlist *v = opaque;
1473 339 HLSContext *c = v->parent->priv_data;
1474 int ret;
1475 339 int just_opened = 0;
1476 339 int reload_count = 0;
1477 339 int segment_retries = 0;
1478 struct segment *seg;
1479
1480 398 restart:
1481
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 398 if (!v->needed)
1482 ✗ return AVERROR_EOF;
1483
1484
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 398 if (!v->input || (c->http_persistent && v->input_read_done)) {
1485 int64_t reload_interval;
1486
1487 /* Check that the playlist is still needed before opening a new
1488 * segment. */
1489 93 v->needed = playlist_needed(v);
1490
1491
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 93 if (!v->needed) {
1492 ✗ av_log(v->parent, AV_LOG_INFO, "No longer receiving playlist %d ('%s')\n",
1493 ✗ v->index, v->url);
1494 ✗ return AVERROR_EOF;
1495 }
1496
1497 /* If this is a live stream and the reload interval has elapsed since
1498 * the last playlist reload, reload the playlists now. */
1499 93 reload_interval = default_reload_interval(v);
1500
1501 ✗ reload:
1502 93 reload_count++;
1503
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 93 if (reload_count > c->max_reload)
1504 ✗ return AVERROR_EOF;
1505
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 93 if (!v->finished &&
1506
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 3 av_gettime_relative() - v->last_load_time >= reload_interval) {
1507 ✗ if ((ret = parse_playlist(c, v->url, v, NULL)) < 0) {
1508 ✗ if (ret != AVERROR_EXIT)
1509 ✗ av_log(v->parent, AV_LOG_WARNING, "Failed to reload playlist %d\n",
1510 v->index);
1511 ✗ return ret;
1512 }
1513 /* If we need to reload the playlist again below (if
1514 * there's still no more segments), switch to a reload
1515 * interval of half the target duration. */
1516 ✗ reload_interval = v->target_duration / 2;
1517 }
1518
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 93 if (v->cur_seq_no < v->start_seq_no) {
1519 ✗ av_log(v->parent, AV_LOG_WARNING,
1520 "skipping %"PRId64" segments ahead, expired from playlists\n",
1521 ✗ v->start_seq_no - v->cur_seq_no);
1522 ✗ v->cur_seq_no = v->start_seq_no;
1523 }
1524
2/2
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✓ Branch 1 taken 30 times.
 93 if (v->cur_seq_no > v->last_seq_no) {
1525 63 v->last_seq_no = v->cur_seq_no;
1526 63 v->m3u8_hold_counters = 0;
1527
1/2
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✗ Branch 1 not taken.
 30 } else if (v->last_seq_no == v->cur_seq_no) {
1528 30 v->m3u8_hold_counters++;
1529
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 30 times.
 30 if (v->m3u8_hold_counters >= c->m3u8_hold_counters) {
1530 ✗ return AVERROR_EOF;
1531 }
1532 } else {
1533 ✗ av_log(v->parent, AV_LOG_WARNING, "The m3u8 list sequence may have been wrapped.\n");
1534 }
1535
2/2
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 93 if (v->cur_seq_no >= v->start_seq_no + v->n_segments) {
1536
1/2
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 32 if (v->finished)
1537 32 return AVERROR_EOF;
1538 ✗ while (av_gettime_relative() - v->last_load_time < reload_interval) {
1539 ✗ if (ff_check_interrupt(c->interrupt_callback))
1540 ✗ return AVERROR_EXIT;
1541 ✗ av_usleep(100*1000);
1542 }
1543 /* Enough time has elapsed since the last reload */
1544 ✗ goto reload;
1545 }
1546
1547 61 v->input_read_done = 0;
1548 61 seg = current_segment(v);
1549
1550 /* load/update Media Initialization Section, if any */
1551 61 ret = update_init_section(v, seg);
1552
1/2
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 61 if (ret)
1553 ✗ return ret;
1554
1555
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 61 if (c->http_multiple == 1 && v->input_next_requested) {
1556 ✗ FFSWAP(AVIOContext *, v->input, v->input_next);
1557 ✗ v->cur_seg_offset = 0;
1558 ✗ v->input_next_requested = 0;
1559 ✗ ret = 0;
1560 } else {
1561 61 ret = open_input(c, v, seg, &v->input);
1562 }
1563
1/2
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✓ Branch 1 taken 61 times.
 61 if (ret < 0) {
1564 ✗ if (ff_check_interrupt(c->interrupt_callback))
1565 ✗ return AVERROR_EXIT;
1566 ✗ av_log(v->parent, AV_LOG_WARNING, "Failed to open segment %"PRId64" of playlist %d\n",
1567 v->cur_seq_no,
1568 v->index);
1569 ✗ if (segment_retries >= c->seg_max_retry) {
1570 ✗ av_log(v->parent, AV_LOG_WARNING, "Segment %"PRId64" of playlist %d failed too many times, skipping\n",
1571 v->cur_seq_no,
1572 v->index);
1573 ✗ v->cur_seq_no++;
1574 ✗ segment_retries = 0;
1575 } else {
1576 ✗ segment_retries++;
1577 }
1578 ✗ goto reload;
1579 }
1580 61 segment_retries = 0;
1581 61 just_opened = 1;
1582 }
1583
1584
1/2
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 366 if (c->http_multiple == -1) {
1585 366 uint8_t *http_version_opt = NULL;
1586 366 int r = av_opt_get(v->input, "http_version", AV_OPT_SEARCH_CHILDREN, &http_version_opt);
1587
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 366 if (r >= 0) {
1588 ✗ c->http_multiple = (!strncmp((const char *)http_version_opt, "1.1", 3) || !strncmp((const char *)http_version_opt, "2.0", 3));
1589 ✗ av_freep(&http_version_opt);
1590 }
1591 }
1592
1593 366 seg = next_segment(v);
1594
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 366 if (c->http_multiple == 1 && !v->input_next_requested &&
1595 ✗ seg && seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1596 ✗ ret = open_input(c, v, seg, &v->input_next);
1597 ✗ if (ret < 0) {
1598 ✗ if (ff_check_interrupt(c->interrupt_callback))
1599 ✗ return AVERROR_EXIT;
1600 ✗ av_log(v->parent, AV_LOG_WARNING, "Failed to open segment %"PRId64" of playlist %d\n",
1601 ✗ v->cur_seq_no + 1,
1602 v->index);
1603 } else {
1604 ✗ v->input_next_requested = 1;
1605 }
1606 }
1607
1608
1/2
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 366 if (v->init_sec_buf_read_offset < v->init_sec_data_len) {
1609 /* Push init section out first before first actual segment */
1610 ✗ int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1611 ✗ memcpy(buf, v->init_sec_buf, copy_size);
1612 ✗ v->init_sec_buf_read_offset += copy_size;
1613 ✗ return copy_size;
1614 }
1615
1616 366 seg = current_segment(v);
1617 366 ret = read_from_url(v, seg, buf, buf_size);
1618
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 366 if (ret > 0) {
1619
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✓ Branch 2 taken 12 times.
✓ Branch 3 taken 49 times.
 307 if (just_opened && v->is_id3_timestamped != 0) {
1620 /* Intercept ID3 tags here, elementary audio streams are required
1621 * to convey timestamps using them in the beginning of each segment. */
1622 12 intercept_id3(v, buf, buf_size, &ret);
1623 }
1624
1625 307 return ret;
1626 }
1627
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 59 if (c->http_persistent &&
1628
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✓ Branch 4 taken 59 times.
 59 seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1629 ✗ v->input_read_done = 1;
1630 } else {
1631 59 ff_format_io_close(v->parent, &v->input);
1632 }
1633 59 v->cur_seq_no++;
1634
1635 59 c->cur_seq_no = v->cur_seq_no;
1636
1637 59 goto restart;
1638 }
1639
1640 ✗ static void add_renditions_to_variant(HLSContext *c, struct variant *var,
1641 enum AVMediaType type, const char *group_id)
1642 {
1643 int i;
1644
1645 ✗ for (i = 0; i < c->n_renditions; i++) {
1646 ✗ struct rendition *rend = c->renditions[i];
1647
1648 ✗ if (rend->type == type && !strcmp(rend->group_id, group_id)) {
1649
1650 ✗ if (rend->playlist)
1651 /* rendition is an external playlist
1652 * => add the playlist to the variant */
1653 ✗ dynarray_add(&var->playlists, &var->n_playlists, rend->playlist);
1654 else
1655 /* rendition is part of the variant main Media Playlist
1656 * => add the rendition to the main Media Playlist */
1657 ✗ dynarray_add(&var->playlists[0]->renditions,
1658 &var->playlists[0]->n_renditions,
1659 rend);
1660 }
1661 }
1662 ✗ }
1663
1664 36 static void add_metadata_from_renditions(AVFormatContext *s, struct playlist *pls,
1665 enum AVMediaType type)
1666 {
1667 36 int rend_idx = 0;
1668 int i;
1669
1670
2/2
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 60 for (i = 0; i < pls->n_main_streams; i++) {
1671 36 AVStream *st = pls->main_streams[i];
1672
1673
2/2
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 36 if (st->codecpar->codec_type != type)
1674 24 continue;
1675
1676
1/2
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 12 for (; rend_idx < pls->n_renditions; rend_idx++) {
1677 ✗ struct rendition *rend = pls->renditions[rend_idx];
1678
1679 ✗ if (rend->type != type)
1680 ✗ continue;
1681
1682 ✗ if (rend->language[0])
1683 ✗ av_dict_set(&st->metadata, "language", rend->language, 0);
1684 ✗ if (rend->name[0])
1685 ✗ av_dict_set(&st->metadata, "comment", rend->name, 0);
1686
1687 ✗ st->disposition |= rend->disposition;
1688 }
1689
1/2
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 12 if (rend_idx >=pls->n_renditions)
1690 12 break;
1691 }
1692 36 }
1693
1694 /* if timestamp was in valid range: returns 1 and sets seq_no
1695 * if not: returns 0 and sets seq_no to closest segment */
1696 ✗ static int find_timestamp_in_playlist(HLSContext *c, struct playlist *pls,
1697 int64_t timestamp, int64_t *seq_no,
1698 int64_t *seg_start_ts)
1699 {
1700 int i;
1701 ✗ int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ?
1702 ✗ 0 : c->first_timestamp;
1703
1704 ✗ if (timestamp < pos) {
1705 ✗ *seq_no = pls->start_seq_no;
1706 ✗ return 0;
1707 }
1708
1709 ✗ for (i = 0; i < pls->n_segments; i++) {
1710 ✗ int64_t diff = pos + pls->segments[i]->duration - timestamp;
1711 ✗ if (diff > 0) {
1712 ✗ *seq_no = pls->start_seq_no + i;
1713 ✗ if (seg_start_ts) {
1714 ✗ *seg_start_ts = pos;
1715 }
1716 ✗ return 1;
1717 }
1718 ✗ pos += pls->segments[i]->duration;
1719 }
1720
1721 ✗ *seq_no = pls->start_seq_no + pls->n_segments - 1;
1722
1723 ✗ return 0;
1724 }
1725
1726 12 static int64_t select_cur_seq_no(HLSContext *c, struct playlist *pls)
1727 {
1728 int64_t seq_no;
1729
1730
3/6
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 12 if (!pls->finished && !c->first_packet &&
1731 ✗ av_gettime_relative() - pls->last_load_time >= default_reload_interval(pls))
1732 /* reload the playlist since it was suspended */
1733 ✗ parse_playlist(c, pls->url, pls, NULL);
1734
1735 /* If playback is already in progress (we are just selecting a new
1736 * playlist) and this is a complete file, find the matching segment
1737 * by counting durations. */
1738
3/4
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 12 if (pls->finished && c->cur_timestamp != AV_NOPTS_VALUE) {
1739 ✗ find_timestamp_in_playlist(c, pls, c->cur_timestamp, &seq_no, NULL);
1740 ✗ return seq_no;
1741 }
1742
1743
2/2
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 12 if (!pls->finished) {
1744
1/2
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 1 if (!c->first_packet && /* we are doing a segment selection during playback */
1745 ✗ c->cur_seq_no >= pls->start_seq_no &&
1746 ✗ c->cur_seq_no < pls->start_seq_no + pls->n_segments)
1747 /* While spec 3.4.3 says that we cannot assume anything about the
1748 * content at the same sequence number on different playlists,
1749 * in practice this seems to work and doing it otherwise would
1750 * require us to download a segment to inspect its timestamps. */
1751 ✗ return c->cur_seq_no;
1752
1753 /* If this is a live stream, start live_start_index segments from the
1754 * start or end */
1755
1/2
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 1 if (c->live_start_index < 0)
1756 1 seq_no = pls->start_seq_no + FFMAX(pls->n_segments +
1757 c->live_start_index, 0);
1758 else
1759 ✗ seq_no = pls->start_seq_no + FFMIN(c->live_start_index,
1760 pls->n_segments - 1);
1761
1762 /* If #EXT-X-START in playlist, need to recalculate */
1763
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 1 if (pls->time_offset_flag && c->prefer_x_start) {
1764 int64_t start_timestamp;
1765 ✗ int64_t playlist_duration = 0;
1766 ✗ int64_t cur_timestamp = c->cur_timestamp == AV_NOPTS_VALUE ? 0 :
1767 c->cur_timestamp;
1768
1769 ✗ for (int i = 0; i < pls->n_segments; i++)
1770 ✗ playlist_duration += pls->segments[i]->duration;
1771
1772 /* If the absolute value of TIME-OFFSET exceeds
1773 * the duration of the playlist, it indicates either the end of the
1774 * playlist (if positive) or the beginning of the playlist (if
1775 * negative). */
1776 ✗ if (pls->start_time_offset >=0 &&
1777 ✗ pls->start_time_offset > playlist_duration)
1778 ✗ start_timestamp = cur_timestamp + playlist_duration;
1779 ✗ else if (pls->start_time_offset >= 0 &&
1780 ✗ pls->start_time_offset <= playlist_duration)
1781 ✗ start_timestamp = cur_timestamp + pls->start_time_offset;
1782 ✗ else if (pls->start_time_offset < 0 &&
1783 ✗ pls->start_time_offset < -playlist_duration)
1784 ✗ start_timestamp = cur_timestamp;
1785 ✗ else if (pls->start_time_offset < 0 &&
1786 ✗ pls->start_time_offset > -playlist_duration)
1787 ✗ start_timestamp = cur_timestamp + playlist_duration +
1788 ✗ pls->start_time_offset;
1789 else
1790 ✗ start_timestamp = cur_timestamp;
1791
1792 ✗ find_timestamp_in_playlist(c, pls, start_timestamp, &seq_no, NULL);
1793 }
1794 1 return seq_no;
1795 }
1796
1797 /* Otherwise just start on the first segment. */
1798 11 return pls->start_seq_no;
1799 }
1800
1801 ✗ static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1802 int flags, AVDictionary **opts)
1803 {
1804 ✗ av_log(s, AV_LOG_ERROR,
1805 "A HLS playlist item '%s' referred to an external file '%s'. "
1806 "Opening this file was forbidden for security reasons\n",
1807 s->url, url);
1808 ✗ return AVERROR(EPERM);
1809 }
1810
1811 12 static void add_stream_to_programs(AVFormatContext *s, struct playlist *pls, AVStream *stream)
1812 {
1813 12 HLSContext *c = s->priv_data;
1814 int i, j;
1815 12 int bandwidth = -1;
1816
1817
2/2
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 24 for (i = 0; i < c->n_variants; i++) {
1818 12 struct variant *v = c->variants[i];
1819
1820
2/2
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 24 for (j = 0; j < v->n_playlists; j++) {
1821
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 12 if (v->playlists[j] != pls)
1822 ✗ continue;
1823
1824 12 av_program_add_stream_index(s, i, stream->index);
1825
1826
1/2
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✗ Branch 1 not taken.
 12 if (bandwidth < 0)
1827 12 bandwidth = v->bandwidth;
1828 ✗ else if (bandwidth != v->bandwidth)
1829 ✗ bandwidth = -1; /* stream in multiple variants with different bandwidths */
1830 }
1831 }
1832
1833
1/2
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 12 if (bandwidth >= 0)
1834 12 av_dict_set_int(&stream->metadata, "variant_bitrate", bandwidth, 0);
1835 12 }
1836
1837 22 static int set_stream_info_from_input_stream(AVStream *st, struct playlist *pls, AVStream *ist)
1838 {
1839 int err;
1840
1841 22 err = avcodec_parameters_copy(st->codecpar, ist->codecpar);
1842
1/2
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 22 if (err < 0)
1843 ✗ return err;
1844
1845
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 22 if (pls->is_id3_timestamped) /* custom timestamps via id3 */
1846 ✗ avpriv_set_pts_info(st, 33, 1, MPEG_TIME_BASE);
1847 else
1848 22 avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, ist->time_base.den);
1849
1850 // copy disposition
1851 22 st->disposition = ist->disposition;
1852
1853 22 av_dict_copy(&st->metadata, ist->metadata, 0);
1854
1855 22 ffstream(st)->need_context_update = 1;
1856
1857 22 return 0;
1858 }
1859
1860 /* add new subdemuxer streams to our context, if any */
1861 6345 static int update_streams_from_subdemuxer(AVFormatContext *s, struct playlist *pls)
1862 {
1863 int err;
1864
1865
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 6357 while (pls->n_main_streams < pls->ctx->nb_streams) {
1866 12 int ist_idx = pls->n_main_streams;
1867 12 AVStream *st = avformat_new_stream(s, NULL);
1868 12 AVStream *ist = pls->ctx->streams[ist_idx];
1869
1870
1/2
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 12 if (!st)
1871 ✗ return AVERROR(ENOMEM);
1872
1873 12 st->id = pls->index;
1874 12 dynarray_add(&pls->main_streams, &pls->n_main_streams, st);
1875
1876 12 add_stream_to_programs(s, pls, st);
1877
1878 12 err = set_stream_info_from_input_stream(st, pls, ist);
1879
1/2
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 12 if (err < 0)
1880 ✗ return err;
1881 }
1882
1883 6345 return 0;
1884 }
1885
1886 23 static void update_noheader_flag(AVFormatContext *s)
1887 {
1888 23 HLSContext *c = s->priv_data;
1889 23 int flag_needed = 0;
1890 int i;
1891
1892
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 35 for (i = 0; i < c->n_playlists; i++) {
1893 23 struct playlist *pls = c->playlists[i];
1894
1895
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 23 if (pls->has_noheader_flag) {
1896 11 flag_needed = 1;
1897 11 break;
1898 }
1899 }
1900
1901
2/2
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 23 if (flag_needed)
1902 11 s->ctx_flags |= AVFMTCTX_NOHEADER;
1903 else
1904 12 s->ctx_flags &= ~AVFMTCTX_NOHEADER;
1905 23 }
1906
1907 12 static int hls_close(AVFormatContext *s)
1908 {
1909 12 HLSContext *c = s->priv_data;
1910
1911 12 free_playlist_list(c);
1912 12 free_variant_list(c);
1913 12 free_rendition_list(c);
1914
1915
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 12 if (c->crypto_ctx.aes_ctx)
1916 ✗ av_free(c->crypto_ctx.aes_ctx);
1917
1918 12 av_dict_free(&c->avio_opts);
1919 12 ff_format_io_close(c->ctx, &c->playlist_pb);
1920
1921 12 return 0;
1922 }
1923
1924 12 static int hls_read_header(AVFormatContext *s)
1925 {
1926 12 HLSContext *c = s->priv_data;
1927 12 int ret = 0, i;
1928 12 int64_t highest_cur_seq_no = 0;
1929
1930 12 c->ctx = s;
1931 12 c->interrupt_callback = &s->interrupt_callback;
1932
1933 12 c->first_packet = 1;
1934 12 c->first_timestamp = AV_NOPTS_VALUE;
1935 12 c->cur_timestamp = AV_NOPTS_VALUE;
1936
1937
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✓ Branch 2 taken 12 times.
 12 if ((ret = ffio_copy_url_options(s->pb, &c->avio_opts)) < 0)
1938 ✗ return ret;
1939
1940 /* XXX: Some HLS servers don't like being sent the range header,
1941 in this case, need to setting http_seekable = 0 to disable
1942 the range header */
1943 12 av_dict_set_int(&c->avio_opts, "seekable", c->http_seekable, 0);
1944
1945
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 12 if ((ret = parse_playlist(c, s->url, NULL, s->pb)) < 0)
1946 ✗ return ret;
1947
1948
1/2
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 12 if (c->n_variants == 0) {
1949 ✗ av_log(s, AV_LOG_WARNING, "Empty playlist\n");
1950 ✗ return AVERROR_EOF;
1951 }
1952 /* If the playlist only contained playlists (Master Playlist),
1953 * parse each individual playlist. */
1954
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 12 if (c->n_playlists > 1 || c->playlists[0]->n_segments == 0) {
1955 ✗ for (i = 0; i < c->n_playlists; i++) {
1956 ✗ struct playlist *pls = c->playlists[i];
1957 ✗ pls->m3u8_hold_counters = 0;
1958 ✗ if ((ret = parse_playlist(c, pls->url, pls, NULL)) < 0) {
1959 ✗ av_log(s, AV_LOG_WARNING, "parse_playlist error %s [%s]\n", av_err2str(ret), pls->url);
1960 ✗ pls->broken = 1;
1961 ✗ if (c->n_playlists > 1)
1962 ✗ continue;
1963 ✗ return ret;
1964 }
1965 }
1966 }
1967
1968
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 24 for (i = 0; i < c->n_variants; i++) {
1969
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 12 if (c->variants[i]->playlists[0]->n_segments == 0) {
1970 ✗ av_log(s, AV_LOG_WARNING, "Empty segment [%s]\n", c->variants[i]->playlists[0]->url);
1971 ✗ c->variants[i]->playlists[0]->broken = 1;
1972 }
1973 }
1974
1975 /* If this isn't a live stream, calculate the total duration of the
1976 * stream. */
1977
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 12 if (c->variants[0]->playlists[0]->finished) {
1978 11 int64_t duration = 0;
1979
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 71 for (i = 0; i < c->variants[0]->playlists[0]->n_segments; i++)
1980 60 duration += c->variants[0]->playlists[0]->segments[i]->duration;
1981 11 s->duration = duration;
1982 }
1983
1984 /* Associate renditions with variants */
1985
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 24 for (i = 0; i < c->n_variants; i++) {
1986 12 struct variant *var = c->variants[i];
1987
1988
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 12 if (var->audio_group[0])
1989 ✗ add_renditions_to_variant(c, var, AVMEDIA_TYPE_AUDIO, var->audio_group);
1990
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 12 if (var->video_group[0])
1991 ✗ add_renditions_to_variant(c, var, AVMEDIA_TYPE_VIDEO, var->video_group);
1992
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 12 if (var->subtitles_group[0])
1993 ✗ add_renditions_to_variant(c, var, AVMEDIA_TYPE_SUBTITLE, var->subtitles_group);
1994 }
1995
1996 /* Create a program for each variant */
1997
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 24 for (i = 0; i < c->n_variants; i++) {
1998 12 struct variant *v = c->variants[i];
1999 AVProgram *program;
2000
2001 12 program = av_new_program(s, i);
2002
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 12 if (!program)
2003 ✗ return AVERROR(ENOMEM);
2004 12 av_dict_set_int(&program->metadata, "variant_bitrate", v->bandwidth, 0);
2005 }
2006
2007 /* Select the starting segments */
2008
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 24 for (i = 0; i < c->n_playlists; i++) {
2009 12 struct playlist *pls = c->playlists[i];
2010
2011
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 12 if (pls->n_segments == 0)
2012 ✗ continue;
2013
2014 12 pls->cur_seq_no = select_cur_seq_no(c, pls);
2015 12 highest_cur_seq_no = FFMAX(highest_cur_seq_no, pls->cur_seq_no);
2016 }
2017
2018 /* Open the demuxer for each playlist */
2019
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 24 for (i = 0; i < c->n_playlists; i++) {
2020 12 struct playlist *pls = c->playlists[i];
2021 12 const AVInputFormat *in_fmt = NULL;
2022 char *url;
2023 12 AVDictionary *options = NULL;
2024 12 struct segment *seg = NULL;
2025
2026
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 12 if (!(pls->ctx = avformat_alloc_context()))
2027 ✗ return AVERROR(ENOMEM);
2028
2029
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 12 if (pls->n_segments == 0)
2030 ✗ continue;
2031
2032 12 pls->index = i;
2033 12 pls->needed = 1;
2034 12 pls->parent = s;
2035
2036 /*
2037 * If this is a live stream and this playlist looks like it is one segment
2038 * behind, try to sync it up so that every substream starts at the same
2039 * time position (so e.g. avformat_find_stream_info() will see packets from
2040 * all active streams within the first few seconds). This is not very generic,
2041 * though, as the sequence numbers are technically independent.
2042 */
2043
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 12 if (!pls->finished && pls->cur_seq_no == highest_cur_seq_no - 1 &&
2044 ✗ highest_cur_seq_no < pls->start_seq_no + pls->n_segments) {
2045 ✗ pls->cur_seq_no = highest_cur_seq_no;
2046 }
2047
2048 12 pls->read_buffer = av_malloc(INITIAL_BUFFER_SIZE);
2049
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 12 if (!pls->read_buffer){
2050 ✗ avformat_free_context(pls->ctx);
2051 ✗ pls->ctx = NULL;
2052 ✗ return AVERROR(ENOMEM);
2053 }
2054
2055 12 ffio_init_context(&pls->pb, pls->read_buffer, INITIAL_BUFFER_SIZE, 0, pls,
2056 read_data, NULL, NULL);
2057
2058 /*
2059 * If encryption scheme is SAMPLE-AES, try to read ID3 tags of
2060 * external audio track that contains audio setup information
2061 */
2062 12 seg = current_segment(pls);
2063
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 12 if (seg && seg->key_type == KEY_SAMPLE_AES && pls->n_renditions > 0 &&
2064 ✗ pls->renditions[0]->type == AVMEDIA_TYPE_AUDIO) {
2065 uint8_t buf[HLS_MAX_ID3_TAGS_DATA_LEN];
2066 ✗ if ((ret = avio_read(&pls->pb.pub, buf, HLS_MAX_ID3_TAGS_DATA_LEN)) < 0) {
2067 /* Fail if error was not end of file */
2068 ✗ if (ret != AVERROR_EOF) {
2069 ✗ avformat_free_context(pls->ctx);
2070 ✗ pls->ctx = NULL;
2071 ✗ return ret;
2072 }
2073 }
2074 ✗ ret = 0;
2075 /* Reset reading */
2076 ✗ ff_format_io_close(pls->parent, &pls->input);
2077 ✗ pls->input = NULL;
2078 ✗ pls->input_read_done = 0;
2079 ✗ ff_format_io_close(pls->parent, &pls->input_next);
2080 ✗ pls->input_next = NULL;
2081 ✗ pls->input_next_requested = 0;
2082 ✗ pls->cur_seg_offset = 0;
2083 ✗ pls->cur_init_section = NULL;
2084 /* Reset EOF flag */
2085 ✗ pls->pb.pub.eof_reached = 0;
2086 /* Clear any buffered data */
2087 ✗ pls->pb.pub.buf_end = pls->pb.pub.buf_ptr = pls->pb.pub.buffer;
2088 /* Reset the position */
2089 ✗ pls->pb.pub.pos = 0;
2090 }
2091
2092 /*
2093 * If encryption scheme is SAMPLE-AES and audio setup information is present in external audio track,
2094 * use that information to find the media format, otherwise probe input data
2095 */
2096
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 12 if (seg && seg->key_type == KEY_SAMPLE_AES && pls->is_id3_timestamped &&
2097 ✗ pls->audio_setup_info.codec_id != AV_CODEC_ID_NONE) {
2098 ✗ void *iter = NULL;
2099 ✗ while ((in_fmt = av_demuxer_iterate(&iter)))
2100 ✗ if (in_fmt->raw_codec_id == pls->audio_setup_info.codec_id)
2101 ✗ break;
2102 } else {
2103
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 12 pls->ctx->probesize = s->probesize > 0 ? s->probesize : 1024 * 4;
2104
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 12 pls->ctx->max_analyze_duration = s->max_analyze_duration > 0 ? s->max_analyze_duration : 4 * AV_TIME_BASE;
2105 12 pls->ctx->interrupt_callback = s->interrupt_callback;
2106 12 url = av_strdup(pls->segments[0]->url);
2107 12 ret = av_probe_input_buffer(&pls->pb.pub, &in_fmt, url, NULL, 0, 0);
2108
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 12 if (ret < 0) {
2109 /* Free the ctx - it isn't initialized properly at this point,
2110 * so avformat_close_input shouldn't be called. If
2111 * avformat_open_input fails below, it frees and zeros the
2112 * context, so it doesn't need any special treatment like this. */
2113 ✗ av_log(s, AV_LOG_ERROR, "Error when loading first segment '%s'\n", url);
2114 ✗ avformat_free_context(pls->ctx);
2115 ✗ pls->ctx = NULL;
2116 ✗ av_free(url);
2117 ✗ return ret;
2118 }
2119 12 av_free(url);
2120 }
2121
2122
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 12 if (seg && seg->key_type == KEY_SAMPLE_AES) {
2123 ✗ if (strstr(in_fmt->name, "mov")) {
2124 char key[33];
2125 ✗ ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
2126 ✗ av_dict_set(&options, "decryption_key", key, 0);
2127 ✗ } else if (!c->crypto_ctx.aes_ctx) {
2128 ✗ c->crypto_ctx.aes_ctx = av_aes_alloc();
2129 ✗ if (!c->crypto_ctx.aes_ctx) {
2130 ✗ avformat_free_context(pls->ctx);
2131 ✗ pls->ctx = NULL;
2132 ✗ return AVERROR(ENOMEM);
2133 }
2134 }
2135 }
2136
2137 12 pls->ctx->pb = &pls->pb.pub;
2138 12 pls->ctx->io_open = nested_io_open;
2139 12 pls->ctx->flags |= s->flags & ~AVFMT_FLAG_CUSTOM_IO;
2140
2141
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 12 if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
2142 ✗ return ret;
2143
2144 12 av_dict_copy(&options, c->seg_format_opts, 0);
2145
2146 12 ret = avformat_open_input(&pls->ctx, pls->segments[0]->url, in_fmt, &options);
2147 12 av_dict_free(&options);
2148
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 12 if (ret < 0)
2149 ✗ return ret;
2150
2151
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 12 if (pls->id3_deferred_extra && pls->ctx->nb_streams == 1) {
2152 ✗ ff_id3v2_parse_apic(pls->ctx, pls->id3_deferred_extra);
2153 ✗ avformat_queue_attached_pictures(pls->ctx);
2154 ✗ ff_id3v2_parse_priv(pls->ctx, pls->id3_deferred_extra);
2155 ✗ ff_id3v2_free_extra_meta(&pls->id3_deferred_extra);
2156 }
2157
2158
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 12 if (pls->is_id3_timestamped == -1)
2159 ✗ av_log(s, AV_LOG_WARNING, "No expected HTTP requests have been made\n");
2160
2161 /*
2162 * For ID3 timestamped raw audio streams we need to detect the packet
2163 * durations to calculate timestamps in fill_timing_for_id3_timestamped_stream(),
2164 * but for other streams we can rely on our user calling avformat_find_stream_info()
2165 * on us if they want to.
2166 */
2167
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 12 if (pls->is_id3_timestamped || (pls->n_renditions > 0 && pls->renditions[0]->type == AVMEDIA_TYPE_AUDIO)) {
2168 ✗ if (seg && seg->key_type == KEY_SAMPLE_AES && pls->audio_setup_info.setup_data_length > 0 &&
2169 ✗ pls->ctx->nb_streams == 1)
2170 ✗ ret = ff_hls_senc_parse_audio_setup_info(pls->ctx->streams[0], &pls->audio_setup_info);
2171 else
2172 ✗ ret = avformat_find_stream_info(pls->ctx, NULL);
2173
2174 ✗ if (ret < 0)
2175 ✗ return ret;
2176 }
2177
2178 12 pls->has_noheader_flag = !!(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER);
2179
2180 /* Create new AVStreams for each stream in this playlist */
2181 12 ret = update_streams_from_subdemuxer(s, pls);
2182
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 12 if (ret < 0)
2183 ✗ return ret;
2184
2185 /*
2186 * Copy any metadata from playlist to main streams, but do not set
2187 * event flags.
2188 */
2189
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 12 if (pls->n_main_streams)
2190 12 av_dict_copy(&pls->main_streams[0]->metadata, pls->ctx->metadata, 0);
2191
2192 12 add_metadata_from_renditions(s, pls, AVMEDIA_TYPE_AUDIO);
2193 12 add_metadata_from_renditions(s, pls, AVMEDIA_TYPE_VIDEO);
2194 12 add_metadata_from_renditions(s, pls, AVMEDIA_TYPE_SUBTITLE);
2195 }
2196
2197 12 update_noheader_flag(s);
2198
2199 12 return 0;
2200 }
2201
2202 6343 static int recheck_discard_flags(AVFormatContext *s, int first)
2203 {
2204 6343 HLSContext *c = s->priv_data;
2205 6343 int i, changed = 0;
2206 int cur_needed;
2207