FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/hls.c
Date: 2025-03-08 20:38:41
Exec Total Coverage
Lines: 589 1403 42.0%
Functions: 33 49 67.3%
Branches: 314 1004 31.3%
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 extension_picky;
227 int max_reload;
228 int http_persistent;
229 int http_multiple;
230 int http_seekable;
231 int seg_max_retry;
232 AVIOContext *playlist_pb;
233 HLSCryptoContext crypto_ctx;
234 } HLSContext;
235
236 12 static void free_segment_dynarray(struct segment **segments, int n_segments)
237 {
238 int i;
239
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 77 for (i = 0; i < n_segments; i++) {
240 65 av_freep(&segments[i]->key);
241 65 av_freep(&segments[i]->url);
242 65 av_freep(&segments[i]);
243 }
244 12 }
245
246 12 static void free_segment_list(struct playlist *pls)
247 {
248 12 free_segment_dynarray(pls->segments, pls->n_segments);
249 12 av_freep(&pls->segments);
250 12 pls->n_segments = 0;
251 12 }
252
253 12 static void free_init_section_list(struct playlist *pls)
254 {
255 int i;
256
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 12 for (i = 0; i < pls->n_init_sections; i++) {
257 ✗ av_freep(&pls->init_sections[i]->key);
258 ✗ av_freep(&pls->init_sections[i]->url);
259 ✗ av_freep(&pls->init_sections[i]);
260 }
261 12 av_freep(&pls->init_sections);
262 12 pls->n_init_sections = 0;
263 12 }
264
265 12 static void free_playlist_list(HLSContext *c)
266 {
267 int i;
268
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 24 for (i = 0; i < c->n_playlists; i++) {
269 12 struct playlist *pls = c->playlists[i];
270 12 free_segment_list(pls);
271 12 free_init_section_list(pls);
272 12 av_freep(&pls->main_streams);
273 12 av_freep(&pls->renditions);
274 12 av_freep(&pls->id3_buf);
275 12 av_dict_free(&pls->id3_initial);
276 12 ff_id3v2_free_extra_meta(&pls->id3_deferred_extra);
277 12 av_freep(&pls->init_sec_buf);
278 12 av_packet_free(&pls->pkt);
279 12 av_freep(&pls->pb.pub.buffer);
280 12 ff_format_io_close(c->ctx, &pls->input);
281 12 pls->input_read_done = 0;
282 12 ff_format_io_close(c->ctx, &pls->input_next);
283 12 pls->input_next_requested = 0;
284
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 12 if (pls->ctx) {
285 12 pls->ctx->pb = NULL;
286 12 avformat_close_input(&pls->ctx);
287 }
288 12 av_free(pls);
289 }
290 12 av_freep(&c->playlists);
291 12 c->n_playlists = 0;
292 12 }
293
294 12 static void free_variant_list(HLSContext *c)
295 {
296 int i;
297
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 24 for (i = 0; i < c->n_variants; i++) {
298 12 struct variant *var = c->variants[i];
299 12 av_freep(&var->playlists);
300 12 av_free(var);
301 }
302 12 av_freep(&c->variants);
303 12 c->n_variants = 0;
304 12 }
305
306 12 static void free_rendition_list(HLSContext *c)
307 {
308 int i;
309
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 12 for (i = 0; i < c->n_renditions; i++)
310 ✗ av_freep(&c->renditions[i]);
311 12 av_freep(&c->renditions);
312 12 c->n_renditions = 0;
313 12 }
314
315 12 static struct playlist *new_playlist(HLSContext *c, const char *url,
316 const char *base)
317 {
318 12 struct playlist *pls = av_mallocz(sizeof(struct playlist));
319
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 12 if (!pls)
320 ✗ return NULL;
321 12 pls->pkt = av_packet_alloc();
322
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 12 if (!pls->pkt) {
323 ✗ av_free(pls);
324 ✗ return NULL;
325 }
326 12 ff_make_absolute_url(pls->url, sizeof(pls->url), base, url);
327
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 12 if (!pls->url[0]) {
328 ✗ av_packet_free(&pls->pkt);
329 ✗ av_free(pls);
330 ✗ return NULL;
331 }
332 12 pls->seek_timestamp = AV_NOPTS_VALUE;
333
334 12 pls->is_id3_timestamped = -1;
335 12 pls->id3_mpegts_timestamp = AV_NOPTS_VALUE;
336
337 12 dynarray_add(&c->playlists, &c->n_playlists, pls);
338 12 return pls;
339 }
340
341 struct variant_info {
342 char bandwidth[20];
343 /* variant group ids: */
344 char audio[MAX_FIELD_LEN];
345 char video[MAX_FIELD_LEN];
346 char subtitles[MAX_FIELD_LEN];
347 };
348
349 12 static struct variant *new_variant(HLSContext *c, struct variant_info *info,
350 const char *url, const char *base)
351 {
352 struct variant *var;
353 struct playlist *pls;
354
355 12 pls = new_playlist(c, url, base);
356
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 12 if (!pls)
357 ✗ return NULL;
358
359 12 var = av_mallocz(sizeof(struct variant));
360
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 12 if (!var)
361 ✗ return NULL;
362
363
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 12 if (info) {
364 ✗ var->bandwidth = atoi(info->bandwidth);
365 ✗ strcpy(var->audio_group, info->audio);
366 ✗ strcpy(var->video_group, info->video);
367 ✗ strcpy(var->subtitles_group, info->subtitles);
368 }
369
370 12 dynarray_add(&c->variants, &c->n_variants, var);
371 12 dynarray_add(&var->playlists, &var->n_playlists, pls);
372 12 return var;
373 }
374
375 ✗ static void handle_variant_args(struct variant_info *info, const char *key,
376 int key_len, char **dest, int *dest_len)
377 {
378 ✗ if (!strncmp(key, "BANDWIDTH=", key_len)) {
379 ✗ *dest = info->bandwidth;
380 ✗ *dest_len = sizeof(info->bandwidth);
381 ✗ } else if (!strncmp(key, "AUDIO=", key_len)) {
382 ✗ *dest = info->audio;
383 ✗ *dest_len = sizeof(info->audio);
384 ✗ } else if (!strncmp(key, "VIDEO=", key_len)) {
385 ✗ *dest = info->video;
386 ✗ *dest_len = sizeof(info->video);
387 ✗ } else if (!strncmp(key, "SUBTITLES=", key_len)) {
388 ✗ *dest = info->subtitles;
389 ✗ *dest_len = sizeof(info->subtitles);
390 }
391 ✗ }
392
393 struct key_info {
394 char uri[MAX_URL_SIZE];
395 char method[11];
396 char iv[35];
397 };
398
399 ✗ static void handle_key_args(struct key_info *info, const char *key,
400 int key_len, char **dest, int *dest_len)
401 {
402 ✗ if (!strncmp(key, "METHOD=", key_len)) {
403 ✗ *dest = info->method;
404 ✗ *dest_len = sizeof(info->method);
405 ✗ } else if (!strncmp(key, "URI=", key_len)) {
406 ✗ *dest = info->uri;
407 ✗ *dest_len = sizeof(info->uri);
408 ✗ } else if (!strncmp(key, "IV=", key_len)) {
409 ✗ *dest = info->iv;
410 ✗ *dest_len = sizeof(info->iv);
411 }
412 ✗ }
413
414 struct init_section_info {
415 char uri[MAX_URL_SIZE];
416 char byterange[32];
417 };
418
419 ✗ static struct segment *new_init_section(struct playlist *pls,
420 struct init_section_info *info,
421 const char *url_base)
422 {
423 struct segment *sec;
424 ✗ char tmp_str[MAX_URL_SIZE], *ptr = tmp_str;
425
426 ✗ if (!info->uri[0])
427 ✗ return NULL;
428
429 ✗ sec = av_mallocz(sizeof(*sec));
430 ✗ if (!sec)
431 ✗ return NULL;
432
433 ✗ if (!av_strncasecmp(info->uri, "data:", 5)) {
434 ✗ ptr = info->uri;
435 } else {
436 ✗ ff_make_absolute_url(tmp_str, sizeof(tmp_str), url_base, info->uri);
437 ✗ if (!tmp_str[0]) {
438 ✗ av_free(sec);
439 ✗ return NULL;
440 }
441 }
442 ✗ sec->url = av_strdup(ptr);
443 ✗ if (!sec->url) {
444 ✗ av_free(sec);
445 ✗ return NULL;
446 }
447
448 ✗ if (info->byterange[0]) {
449 ✗ sec->size = strtoll(info->byterange, NULL, 10);
450 ✗ ptr = strchr(info->byterange, '@');
451 ✗ if (ptr)
452 ✗ sec->url_offset = strtoll(ptr+1, NULL, 10);
453 } else {
454 /* the entire file is the init section */
455 ✗ sec->size = -1;
456 }
457
458 ✗ dynarray_add(&pls->init_sections, &pls->n_init_sections, sec);
459
460 ✗ return sec;
461 }
462
463 ✗ static void handle_init_section_args(struct init_section_info *info, const char *key,
464 int key_len, char **dest, int *dest_len)
465 {
466 ✗ if (!strncmp(key, "URI=", key_len)) {
467 ✗ *dest = info->uri;
468 ✗ *dest_len = sizeof(info->uri);
469 ✗ } else if (!strncmp(key, "BYTERANGE=", key_len)) {
470 ✗ *dest = info->byterange;
471 ✗ *dest_len = sizeof(info->byterange);
472 }
473 ✗ }
474
475 struct rendition_info {
476 char type[16];
477 char uri[MAX_URL_SIZE];
478 char group_id[MAX_FIELD_LEN];
479 char language[MAX_FIELD_LEN];
480 char assoc_language[MAX_FIELD_LEN];
481 char name[MAX_FIELD_LEN];
482 char defaultr[4];
483 char forced[4];
484 char characteristics[MAX_CHARACTERISTICS_LEN];
485 };
486
487 ✗ static struct rendition *new_rendition(HLSContext *c, struct rendition_info *info,
488 const char *url_base)
489 {
490 struct rendition *rend;
491 ✗ enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
492 char *characteristic;
493 char *chr_ptr;
494 char *saveptr;
495
496 ✗ if (!strcmp(info->type, "AUDIO"))
497 ✗ type = AVMEDIA_TYPE_AUDIO;
498 ✗ else if (!strcmp(info->type, "VIDEO"))
499 ✗ type = AVMEDIA_TYPE_VIDEO;
500 ✗ else if (!strcmp(info->type, "SUBTITLES"))
501 ✗ type = AVMEDIA_TYPE_SUBTITLE;
502 ✗ else if (!strcmp(info->type, "CLOSED-CAPTIONS"))
503 /* CLOSED-CAPTIONS is ignored since we do not support CEA-608 CC in
504 * AVC SEI RBSP anyway */
505 ✗ return NULL;
506
507 ✗ if (type == AVMEDIA_TYPE_UNKNOWN) {
508 ✗ av_log(c->ctx, AV_LOG_WARNING, "Can't support the type: %s\n", info->type);
509 ✗ return NULL;
510 }
511
512 /* URI is mandatory for subtitles as per spec */
513 ✗ if (type == AVMEDIA_TYPE_SUBTITLE && !info->uri[0]) {
514 ✗ av_log(c->ctx, AV_LOG_ERROR, "The URI tag is REQUIRED for subtitle.\n");
515 ✗ return NULL;
516 }
517
518 /* TODO: handle subtitles (each segment has to parsed separately) */
519 ✗ if (c->ctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL)
520 ✗ if (type == AVMEDIA_TYPE_SUBTITLE) {
521 ✗ av_log(c->ctx, AV_LOG_WARNING, "Can't support the subtitle(uri: %s)\n", info->uri);
522 ✗ return NULL;
523 }
524
525 ✗ rend = av_mallocz(sizeof(struct rendition));
526 ✗ if (!rend)
527 ✗ return NULL;
528
529 ✗ dynarray_add(&c->renditions, &c->n_renditions, rend);
530
531 ✗ rend->type = type;
532 ✗ strcpy(rend->group_id, info->group_id);
533 ✗ strcpy(rend->language, info->language);
534 ✗ strcpy(rend->name, info->name);
535
536 /* add the playlist if this is an external rendition */
537 ✗ if (info->uri[0]) {
538 ✗ rend->playlist = new_playlist(c, info->uri, url_base);
539 ✗ if (rend->playlist)
540 ✗ dynarray_add(&rend->playlist->renditions,
541 &rend->playlist->n_renditions, rend);
542 }
543
544 ✗ if (info->assoc_language[0]) {
545 ✗ size_t langlen = strlen(rend->language);
546 ✗ if (langlen < sizeof(rend->language) - 3) {
547 size_t assoc_len;
548 ✗ rend->language[langlen] = ',';
549 ✗ assoc_len = av_strlcpy(rend->language + langlen + 1,
550 ✗ info->assoc_language,
551 sizeof(rend->language) - langlen - 1);
552 ✗ if (langlen + assoc_len + 2 > sizeof(rend->language)) // truncation occurred
553 ✗ av_log(c->ctx, AV_LOG_WARNING, "Truncated rendition language: %s\n",
554 ✗ info->assoc_language);
555 }
556 }
557
558 ✗ if (!strcmp(info->defaultr, "YES"))
559 ✗ rend->disposition |= AV_DISPOSITION_DEFAULT;
560 ✗ if (!strcmp(info->forced, "YES"))
561 ✗ rend->disposition |= AV_DISPOSITION_FORCED;
562
563 ✗ chr_ptr = info->characteristics;
564 ✗ while ((characteristic = av_strtok(chr_ptr, ",", &saveptr))) {
565 ✗ if (!strcmp(characteristic, "public.accessibility.describes-music-and-sound"))
566 ✗ rend->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
567 ✗ else if (!strcmp(characteristic, "public.accessibility.describes-video"))
568 ✗ rend->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
569
570 ✗ chr_ptr = NULL;
571 }
572
573 ✗ return rend;
574 }
575
576 ✗ static void handle_rendition_args(struct rendition_info *info, const char *key,
577 int key_len, char **dest, int *dest_len)
578 {
579 ✗ if (!strncmp(key, "TYPE=", key_len)) {
580 ✗ *dest = info->type;
581 ✗ *dest_len = sizeof(info->type);
582 ✗ } else if (!strncmp(key, "URI=", key_len)) {
583 ✗ *dest = info->uri;
584 ✗ *dest_len = sizeof(info->uri);
585 ✗ } else if (!strncmp(key, "GROUP-ID=", key_len)) {
586 ✗ *dest = info->group_id;
587 ✗ *dest_len = sizeof(info->group_id);
588 ✗ } else if (!strncmp(key, "LANGUAGE=", key_len)) {
589 ✗ *dest = info->language;
590 ✗ *dest_len = sizeof(info->language);
591 ✗ } else if (!strncmp(key, "ASSOC-LANGUAGE=", key_len)) {
592 ✗ *dest = info->assoc_language;
593 ✗ *dest_len = sizeof(info->assoc_language);
594 ✗ } else if (!strncmp(key, "NAME=", key_len)) {
595 ✗ *dest = info->name;
596 ✗ *dest_len = sizeof(info->name);
597 ✗ } else if (!strncmp(key, "DEFAULT=", key_len)) {
598 ✗ *dest = info->defaultr;
599 ✗ *dest_len = sizeof(info->defaultr);
600 ✗ } else if (!strncmp(key, "FORCED=", key_len)) {
601 ✗ *dest = info->forced;
602 ✗ *dest_len = sizeof(info->forced);
603 ✗ } else if (!strncmp(key, "CHARACTERISTICS=", key_len)) {
604 ✗ *dest = info->characteristics;
605 ✗ *dest_len = sizeof(info->characteristics);
606 }
607 /*
608 * ignored:
609 * - AUTOSELECT: client may autoselect based on e.g. system language
610 * - INSTREAM-ID: EIA-608 closed caption number ("CC1".."CC4")
611 */
612 ✗ }
613
614 /* used by parse_playlist to allocate a new variant+playlist when the
615 * playlist is detected to be a Media Playlist (not Master Playlist)
616 * and we have no parent Master Playlist (parsing of which would have
617 * allocated the variant and playlist already)
618 * *pls == NULL => Master Playlist or parentless Media Playlist
619 * *pls != NULL => parented Media Playlist, playlist+variant allocated */
620 89 static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
621 {
622
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 89 if (*pls)
623 77 return 0;
624
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 12 if (!new_variant(c, NULL, url, NULL))
625 ✗ return AVERROR(ENOMEM);
626 12 *pls = c->playlists[c->n_playlists - 1];
627 12 return 0;
628 }
629
630 ✗ static int open_url_keepalive(AVFormatContext *s, AVIOContext **pb,
631 const char *url, AVDictionary **options)
632 {
633 #if !CONFIG_HTTP_PROTOCOL
634 return AVERROR_PROTOCOL_NOT_FOUND;
635 #else
636 int ret;
637 ✗ URLContext *uc = ffio_geturlcontext(*pb);
638 ✗ av_assert0(uc);
639 ✗ (*pb)->eof_reached = 0;
640 ✗ ret = ff_http_do_new_request2(uc, url, options);
641 ✗ if (ret < 0) {
642 ✗ ff_format_io_close(s, pb);
643 }
644 ✗ return ret;
645 #endif
646 }
647
648 61 static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
649 AVDictionary **opts, AVDictionary *opts2, int *is_http_out)
650 {
651 61 HLSContext *c = s->priv_data;
652 61 AVDictionary *tmp = NULL;
653 61 const char *proto_name = NULL;
654 int ret;
655 61 int is_http = 0;
656
657
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 61 if (av_strstart(url, "crypto", NULL)) {
658 ✗ if (url[6] == '+' || url[6] == ':')
659 ✗ proto_name = avio_find_protocol_name(url + 7);
660
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 61 } else if (av_strstart(url, "data", NULL)) {
661 ✗ if (url[4] == '+' || url[4] == ':')
662 ✗ proto_name = avio_find_protocol_name(url + 5);
663 }
664
665
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 61 if (!proto_name)
666 61 proto_name = avio_find_protocol_name(url);
667
668
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 61 if (!proto_name)
669 ✗ return AVERROR_INVALIDDATA;
670
671 // only http(s) & file are allowed
672
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 61 if (av_strstart(proto_name, "file", NULL)) {
673
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 61 if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
674 ✗ av_log(s, AV_LOG_ERROR,
675 "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
676 "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
677 url);
678 ✗ return AVERROR_INVALIDDATA;
679 }
680 ✗ } else if (av_strstart(proto_name, "http", NULL)) {
681 ✗ is_http = 1;
682 ✗ } else if (av_strstart(proto_name, "data", NULL)) {
683 ;
684 } else
685 ✗ return AVERROR_INVALIDDATA;
686
687
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 61 if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
688 ;
689
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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)] == ':')
690 ;
691
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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)] == ':')
692 ;
693
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 61 else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
694 ✗ return AVERROR_INVALIDDATA;
695
696 61 av_dict_copy(&tmp, *opts, 0);
697 61 av_dict_copy(&tmp, opts2, 0);
698
699
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 61 if (is_http && c->http_persistent && *pb) {
700 ✗ ret = open_url_keepalive(c->ctx, pb, url, &tmp);
701 ✗ if (ret == AVERROR_EXIT) {
702 ✗ av_dict_free(&tmp);
703 ✗ return ret;
704 ✗ } else if (ret < 0) {
705 ✗ if (ret != AVERROR_EOF)
706 ✗ av_log(s, AV_LOG_WARNING,
707 "keepalive request failed for '%s' with error: '%s' when opening url, retrying with new connection\n",
708 ✗ url, av_err2str(ret));
709 ✗ av_dict_copy(&tmp, *opts, 0);
710 ✗ av_dict_copy(&tmp, opts2, 0);
711 ✗ ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
712 }
713 } else {
714 61 ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
715 }
716
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 61 if (ret >= 0) {
717 // update cookies on http response with setcookies.
718 61 char *new_cookies = NULL;
719
720
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 61 if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
721 61 av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
722
723
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 61 if (new_cookies)
724 ✗ av_dict_set(opts, "cookies", new_cookies, AV_DICT_DONT_STRDUP_VAL);
725 }
726
727 61 av_dict_free(&tmp);
728
729
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 61 if (is_http_out)
730 61 *is_http_out = is_http;
731
732 61 return ret;
733 }
734
735 130 static int test_segment(AVFormatContext *s, const AVInputFormat *in_fmt, struct playlist *pls, struct segment *seg)
736 {
737 130 HLSContext *c = s->priv_data;
738 130 int matchA = 3;
739 130 int matchF = 0;
740
741
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 130 if (!c->extension_picky)
742 ✗ return 0;
743
744
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 130 if (strcmp(c->allowed_extensions, "ALL"))
745 260 matchA = av_match_ext (seg->url, c->allowed_extensions)
746
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 130 + 2*(ff_match_url_ext(seg->url, c->allowed_extensions) > 0);
747
748
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 130 if (!matchA) {
749 ✗ av_log(s, AV_LOG_ERROR, "URL %s is not in allowed_extensions\n", seg->url);
750 ✗ return AVERROR_INVALIDDATA;
751 }
752
753
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 130 if (in_fmt) {
754
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 65 if (in_fmt->extensions) {
755 3 matchF = av_match_ext( seg->url, in_fmt->extensions)
756
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 3 + 2*(ff_match_url_ext(seg->url, in_fmt->extensions) > 0);
757
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 3 if(av_match_name("mp4", in_fmt->name)) {
758 ✗ matchF |= av_match_ext( seg->url, "ts,m2t,m2ts,mts,mpg,m4s,mpeg,mpegts")
759 ✗ + 2*(ff_match_url_ext(seg->url, "ts,m2t,m2ts,mts,mpg,m4s,mpeg,mpegts") > 0);
760 }
761
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 62 } else if (!strcmp(in_fmt->name, "mpegts")) {
762 124 matchF = av_match_ext( seg->url, "ts,m2t,m2ts,mts,mpg,m4s,mpeg,mpegts")
763
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 62 + 2*(ff_match_url_ext(seg->url, "ts,m2t,m2ts,mts,mpg,m4s,mpeg,mpegts") > 0);
764 }
765
766
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 65 if (!(matchA & matchF)) {
767 ✗ av_log(s, AV_LOG_ERROR, "detected format %s extension %s mismatches allowed extensions in url %s\n", in_fmt->name, in_fmt->extensions ? in_fmt->extensions : "none", seg->url);
768 ✗ return AVERROR_INVALIDDATA;
769 }
770 }
771
772 130 return 0;
773 }
774
775 12 static int parse_playlist(HLSContext *c, const char *url,
776 struct playlist *pls, AVIOContext *in)
777 {
778 12 int ret = 0, is_segment = 0, is_variant = 0;
779 12 int64_t duration = 0;
780 12 enum KeyType key_type = KEY_NONE;
781 12 uint8_t iv[16] = "";
782 12 int has_iv = 0;
783 12 char key[MAX_URL_SIZE] = "";
784 char line[MAX_URL_SIZE];
785 const char *ptr;
786 12 int close_in = 0;
787 12 int64_t seg_offset = 0;
788 12 int64_t seg_size = -1;
789 12 uint8_t *new_url = NULL;
790 struct variant_info variant_info;
791 char tmp_str[MAX_URL_SIZE];
792 12 struct segment *cur_init_section = NULL;
793 12 int is_http = av_strstart(url, "http", NULL);
794 12 struct segment **prev_segments = NULL;
795 12 int prev_n_segments = 0;
796 12 int64_t prev_start_seq_no = -1;
797
798
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 12 if (is_http && !in && c->http_persistent && c->playlist_pb) {
799 ✗ in = c->playlist_pb;
800 ✗ ret = open_url_keepalive(c->ctx, &c->playlist_pb, url, NULL);
801 ✗ if (ret == AVERROR_EXIT) {
802 ✗ return ret;
803 ✗ } else if (ret < 0) {
804 ✗ if (ret != AVERROR_EOF)
805 ✗ av_log(c->ctx, AV_LOG_WARNING,
806 "keepalive request failed for '%s' with error: '%s' when parsing playlist\n",
807 ✗ url, av_err2str(ret));
808 ✗ in = NULL;
809 }
810 }
811
812
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 12 if (!in) {
813 ✗ AVDictionary *opts = NULL;
814 ✗ av_dict_copy(&opts, c->avio_opts, 0);
815
816 ✗ if (c->http_persistent)
817 ✗ av_dict_set(&opts, "multiple_requests", "1", 0);
818
819 ✗ ret = c->ctx->io_open(c->ctx, &in, url, AVIO_FLAG_READ, &opts);
820 ✗ av_dict_free(&opts);
821 ✗ if (ret < 0)
822 ✗ return ret;
823
824 ✗ if (is_http && c->http_persistent)
825 ✗ c->playlist_pb = in;
826 else
827 ✗ close_in = 1;
828 }
829
830
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 12 if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0)
831 ✗ url = new_url;
832
833 12 ff_get_chomp_line(in, line, sizeof(line));
834
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 12 if (strcmp(line, "#EXTM3U")) {
835 ✗ ret = AVERROR_INVALIDDATA;
836 ✗ goto fail;
837 }
838
839
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 12 if (pls) {
840 ✗ prev_start_seq_no = pls->start_seq_no;
841 ✗ prev_segments = pls->segments;
842 ✗ prev_n_segments = pls->n_segments;
843 ✗ pls->segments = NULL;
844 ✗ pls->n_segments = 0;
845
846 ✗ pls->finished = 0;
847 ✗ pls->type = PLS_TYPE_UNSPECIFIED;
848 }
849
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 225 while (!avio_feof(in)) {
850 213 ff_get_chomp_line(in, line, sizeof(line));
851
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 213 if (av_strstart(line, "#EXT-X-STREAM-INF:", &ptr)) {
852 ✗ is_variant = 1;
853 ✗ memset(&variant_info, 0, sizeof(variant_info));
854 ✗ ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_variant_args,
855 &variant_info);
856
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 213 } else if (av_strstart(line, "#EXT-X-KEY:", &ptr)) {
857 ✗ struct key_info info = {{0}};
858 ✗ ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_key_args,
859 &info);
860 ✗ key_type = KEY_NONE;
861 ✗ has_iv = 0;
862 ✗ if (!strcmp(info.method, "AES-128"))
863 ✗ key_type = KEY_AES_128;
864 ✗ if (!strcmp(info.method, "SAMPLE-AES"))
865 ✗ key_type = KEY_SAMPLE_AES;
866 ✗ if (!av_strncasecmp(info.iv, "0x", 2)) {
867 ✗ ff_hex_to_data(iv, info.iv + 2);
868 ✗ has_iv = 1;
869 }
870 ✗ av_strlcpy(key, info.uri, sizeof(key));
871
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 213 } else if (av_strstart(line, "#EXT-X-MEDIA:", &ptr)) {
872 ✗ struct rendition_info info = {{0}};
873 ✗ ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_rendition_args,
874 &info);
875 ✗ new_rendition(c, &info, url);
876
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 213 } else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
877 int64_t t;
878 12 ret = ensure_playlist(c, &pls, url);
879
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 12 if (ret < 0)
880 ✗ goto fail;
881 12 t = strtoll(ptr, NULL, 10);
882
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✓ Branch 3 taken 12 times.
 12 if (t < 0 || t >= INT64_MAX / AV_TIME_BASE) {
883 ✗ ret = AVERROR_INVALIDDATA;
884 ✗ goto fail;
885 }
886 12 pls->target_duration = t * AV_TIME_BASE;
887
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 201 } else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
888 uint64_t seq_no;
889 12 ret = ensure_playlist(c, &pls, url);
890
1/2
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 12 if (ret < 0)
891 ✗ goto fail;
892 12 seq_no = strtoull(ptr, NULL, 10);
893
1/2
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 12 if (seq_no > INT64_MAX/2) {
894 ✗ av_log(c->ctx, AV_LOG_DEBUG, "MEDIA-SEQUENCE higher than "
895 "INT64_MAX/2, mask out the highest bit\n");
896 ✗ seq_no &= INT64_MAX/2;
897 }
898 12 pls->start_seq_no = seq_no;
899
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 189 } else if (av_strstart(line, "#EXT-X-PLAYLIST-TYPE:", &ptr)) {
900 ✗ ret = ensure_playlist(c, &pls, url);
901 ✗ if (ret < 0)
902 ✗ goto fail;
903 ✗ if (!strcmp(ptr, "EVENT"))
904 ✗ pls->type = PLS_TYPE_EVENT;
905 ✗ else if (!strcmp(ptr, "VOD"))
906 ✗ pls->type = PLS_TYPE_VOD;
907
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 189 } else if (av_strstart(line, "#EXT-X-MAP:", &ptr)) {
908 ✗ struct init_section_info info = {{0}};
909 ✗ ret = ensure_playlist(c, &pls, url);
910 ✗ if (ret < 0)
911 ✗ goto fail;
912 ✗ ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_init_section_args,
913 &info);
914 ✗ cur_init_section = new_init_section(pls, &info, url);
915 ✗ if (!cur_init_section) {
916 ✗ ret = AVERROR(ENOMEM);
917 ✗ goto fail;
918 }
919 ✗ cur_init_section->key_type = key_type;
920 ✗ if (has_iv) {
921 ✗ memcpy(cur_init_section->iv, iv, sizeof(iv));
922 } else {
923 ✗ int64_t seq = pls->start_seq_no + pls->n_segments;
924 ✗ memset(cur_init_section->iv, 0, sizeof(cur_init_section->iv));
925 ✗ AV_WB64(cur_init_section->iv + 8, seq);
926 }
927
928 ✗ if (key_type != KEY_NONE) {
929 ✗ ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
930 ✗ if (!tmp_str[0]) {
931 ✗ av_free(cur_init_section);
932 ✗ ret = AVERROR_INVALIDDATA;
933 ✗ goto fail;
934 }
935 ✗ cur_init_section->key = av_strdup(tmp_str);
936 ✗ if (!cur_init_section->key) {
937 ✗ av_free(cur_init_section);
938 ✗ ret = AVERROR(ENOMEM);
939 ✗ goto fail;
940 }
941 } else {
942 ✗ cur_init_section->key = NULL;
943 }
944
945
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 189 } else if (av_strstart(line, "#EXT-X-START:", &ptr)) {
946 ✗ const char *time_offset_value = NULL;
947 ✗ ret = ensure_playlist(c, &pls, url);
948 ✗ if (ret < 0) {
949 ✗ goto fail;
950 }
951 ✗ if (av_strstart(ptr, "TIME-OFFSET=", &time_offset_value)) {
952 ✗ float offset = strtof(time_offset_value, NULL);
953 ✗ pls->start_time_offset = offset * AV_TIME_BASE;
954 ✗ pls->time_offset_flag = 1;
955 } else {
956 ✗ av_log(c->ctx, AV_LOG_WARNING, "#EXT-X-START value is"
957 "invalid, it will be ignored");
958 ✗ continue;
959 }
960
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 189 } else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
961
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 11 if (pls)
962 11 pls->finished = 1;
963
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 178 } else if (av_strstart(line, "#EXTINF:", &ptr)) {
964 65 is_segment = 1;
965 65 duration = atof(ptr) * AV_TIME_BASE;
966
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 113 } else if (av_strstart(line, "#EXT-X-BYTERANGE:", &ptr)) {
967 20 seg_size = strtoll(ptr, NULL, 10);
968 20 ptr = strchr(ptr, '@');
969
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 20 if (ptr)
970 20 seg_offset = strtoll(ptr+1, NULL, 10);
971
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 93 } else if (av_strstart(line, "#", NULL)) {
972 16 av_log(c->ctx, AV_LOG_INFO, "Skip ('%s')\n", line);
973 16 continue;
974
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 77 } else if (line[0]) {
975
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 65 if (is_variant) {
976 ✗ if (!new_variant(c, &variant_info, line, url)) {
977 ✗ ret = AVERROR(ENOMEM);
978 ✗ goto fail;
979 }
980 ✗ is_variant = 0;
981 }
982
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 65 if (is_segment) {
983 struct segment *seg;
984 65 ret = ensure_playlist(c, &pls, url);
985
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 65 if (ret < 0)
986 ✗ goto fail;
987 65 seg = av_malloc(sizeof(struct segment));
988
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 65 if (!seg) {
989 ✗ ret = AVERROR(ENOMEM);
990 ✗ goto fail;
991 }
992
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 65 if (has_iv) {
993 ✗ memcpy(seg->iv, iv, sizeof(iv));
994 } else {
995 65 uint64_t seq = pls->start_seq_no + (uint64_t)pls->n_segments;
996 65 memset(seg->iv, 0, sizeof(seg->iv));
997 65 AV_WB64(seg->iv + 8, seq);
998 }
999
1000
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 65 if (key_type != KEY_NONE) {
1001 ✗ ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
1002 ✗ if (!tmp_str[0]) {
1003 ✗ ret = AVERROR_INVALIDDATA;
1004 ✗ av_free(seg);
1005 ✗ goto fail;
1006 }
1007 ✗ seg->key = av_strdup(tmp_str);
1008 ✗ if (!seg->key) {
1009 ✗ av_free(seg);
1010 ✗ ret = AVERROR(ENOMEM);
1011 ✗ goto fail;
1012 }
1013 } else {
1014 65 seg->key = NULL;
1015 }
1016
1017 65 ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, line);
1018
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 65 if (!tmp_str[0]) {
1019 ✗ ret = AVERROR_INVALIDDATA;
1020 ✗ if (seg->key)
1021 ✗ av_free(seg->key);
1022 ✗ av_free(seg);
1023 ✗ goto fail;
1024 }
1025 65 seg->url = av_strdup(tmp_str);
1026
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 65 if (!seg->url) {
1027 ✗ av_free(seg->key);
1028 ✗ av_free(seg);
1029 ✗ ret = AVERROR(ENOMEM);
1030 ✗ goto fail;
1031 }
1032
1033
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 65 ret = test_segment(c->ctx, pls->ctx ? pls->ctx->iformat : NULL, pls, seg);
1034
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 65 if (ret < 0) {
1035 ✗ av_free(seg->url);
1036 ✗ av_free(seg->key);
1037 ✗ av_free(seg);
1038 ✗ goto fail;
1039 }
1040
1041
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 65 if (duration < 0.001 * AV_TIME_BASE) {
1042 ✗ av_log(c->ctx, AV_LOG_WARNING, "Cannot get correct #EXTINF value of segment %s,"
1043 " set to default value to 1ms.\n", seg->url);
1044 ✗ duration = 0.001 * AV_TIME_BASE;
1045 }
1046 65 seg->duration = duration;
1047 65 seg->key_type = key_type;
1048 65 dynarray_add(&pls->segments, &pls->n_segments, seg);
1049 65 is_segment = 0;
1050
1051 65 seg->size = seg_size;
1052
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 65 if (seg_size >= 0) {
1053 20 seg->url_offset = seg_offset;
1054 20 seg_offset += seg_size;
1055 20 seg_size = -1;
1056 } else {
1057 45 seg->url_offset = 0;
1058 45 seg_offset = 0;
1059 }
1060
1061 65 seg->init_section = cur_init_section;
1062 }
1063 }
1064 }
1065
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 12 if (prev_segments) {
1066 ✗ if (pls->start_seq_no > prev_start_seq_no && c->first_timestamp != AV_NOPTS_VALUE) {
1067 ✗ int64_t prev_timestamp = c->first_timestamp;
1068 int i;
1069 ✗ int64_t diff = pls->start_seq_no - prev_start_seq_no;
1070 ✗ for (i = 0; i < prev_n_segments && i < diff; i++) {
1071 ✗ c->first_timestamp += prev_segments[i]->duration;
1072 }
1073 ✗ av_log(c->ctx, AV_LOG_DEBUG, "Media sequence change (%"PRId64" -> %"PRId64")"
1074 " reflected in first_timestamp: %"PRId64" -> %"PRId64"\n",
1075 ✗ prev_start_seq_no, pls->start_seq_no,
1076 prev_timestamp, c->first_timestamp);
1077 ✗ } else if (pls->start_seq_no < prev_start_seq_no) {
1078 ✗ av_log(c->ctx, AV_LOG_WARNING, "Media sequence changed unexpectedly: %"PRId64" -> %"PRId64"\n",
1079 ✗ prev_start_seq_no, pls->start_seq_no);
1080 }
1081 ✗ free_segment_dynarray(prev_segments, prev_n_segments);
1082 ✗ av_freep(&prev_segments);
1083 }
1084
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 12 if (pls)
1085 12 pls->last_load_time = av_gettime_relative();
1086
1087 ✗ fail:
1088 12 av_free(new_url);
1089
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 12 if (close_in)
1090 ✗ ff_format_io_close(c->ctx, &in);
1091 12 c->ctx->ctx_flags = c->ctx->ctx_flags & ~(unsigned)AVFMTCTX_UNSEEKABLE;
1092
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 12 if (!c->n_variants || !c->variants[0]->n_playlists ||
1093
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 12 !(c->variants[0]->playlists[0]->finished ||
1094
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 1 c->variants[0]->playlists[0]->type == PLS_TYPE_EVENT))
1095 1 c->ctx->ctx_flags |= AVFMTCTX_UNSEEKABLE;
1096 12 return ret;
1097 }
1098
1099 6832 static struct segment *current_segment(struct playlist *pls)
1100 {
1101 6832 int64_t n = pls->cur_seq_no - pls->start_seq_no;
1102
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 6832 if (n >= pls->n_segments)
1103 2 return NULL;
1104 6830 return pls->segments[n];
1105 }
1106
1107 366 static struct segment *next_segment(struct playlist *pls)
1108 {
1109 366 int64_t n = pls->cur_seq_no - pls->start_seq_no + 1;
1110
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 366 if (n >= pls->n_segments)
1111 72 return NULL;
1112 294 return pls->segments[n];
1113 }
1114
1115 366 static int read_from_url(struct playlist *pls, struct segment *seg,
1116 uint8_t *buf, int buf_size)
1117 {
1118 int ret;
1119
1120 /* limit read if the segment was only a part of a file */
1121
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 366 if (seg->size >= 0)
1122 100 buf_size = FFMIN(buf_size, seg->size - pls->cur_seg_offset);
1123
1124 366 ret = avio_read(pls->input, buf, buf_size);
1125
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 366 if (ret > 0)
1126 307 pls->cur_seg_offset += ret;
1127
1128 366 return ret;
1129 }
1130
1131 /* Parse the raw ID3 data and pass contents to caller */
1132 ✗ static void parse_id3(AVFormatContext *s, AVIOContext *pb,
1133 AVDictionary **metadata, int64_t *dts, HLSAudioSetupInfo *audio_setup_info,
1134 ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
1135 {
1136 static const char id3_priv_owner_ts[] = "com.apple.streaming.transportStreamTimestamp";
1137 static const char id3_priv_owner_audio_setup[] = "com.apple.streaming.audioDescription";
1138 ID3v2ExtraMeta *meta;
1139
1140 ✗ ff_id3v2_read_dict(pb, metadata, ID3v2_DEFAULT_MAGIC, extra_meta);
1141 ✗ for (meta = *extra_meta; meta; meta = meta->next) {
1142 ✗ if (!strcmp(meta->tag, "PRIV")) {
1143 ✗ ID3v2ExtraMetaPRIV *priv = &meta->data.priv;
1144 ✗ if (priv->datasize == 8 && !av_strncasecmp(priv->owner, id3_priv_owner_ts, 44)) {
1145 /* 33-bit MPEG timestamp */
1146 ✗ int64_t ts = AV_RB64(priv->data);
1147 ✗ av_log(s, AV_LOG_DEBUG, "HLS ID3 audio timestamp %"PRId64"\n", ts);
1148 ✗ if ((ts & ~((1ULL << 33) - 1)) == 0)
1149 ✗ *dts = ts;
1150 else
1151 ✗ av_log(s, AV_LOG_ERROR, "Invalid HLS ID3 audio timestamp %"PRId64"\n", ts);
1152 ✗ } else if (priv->datasize >= 8 && !av_strncasecmp(priv->owner, id3_priv_owner_audio_setup, 36)) {
1153 ✗ ff_hls_senc_read_audio_setup_info(audio_setup_info, priv->data, priv->datasize);
1154 }
1155 ✗ } else if (!strcmp(meta->tag, "APIC") && apic)
1156 ✗ *apic = &meta->data.apic;
1157 }
1158 ✗ }
1159
1160 /* Check if the ID3 metadata contents have changed */
1161 ✗ static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata,
1162 ID3v2ExtraMetaAPIC *apic)
1163 {
1164 ✗ const AVDictionaryEntry *entry = NULL;
1165 const AVDictionaryEntry *oldentry;
1166 /* check that no keys have changed values */
1167 ✗ while ((entry = av_dict_iterate(metadata, entry))) {
1168 ✗ oldentry = av_dict_get(pls->id3_initial, entry->key, NULL, AV_DICT_MATCH_CASE);
1169 ✗ if (!oldentry || strcmp(oldentry->value, entry->value) != 0)
1170 ✗ return 1;
1171 }
1172
1173 /* check if apic appeared */
1174 ✗ if (apic && (pls->ctx->nb_streams != 2 || !pls->ctx->streams[1]->attached_pic.data))
1175 ✗ return 1;
1176
1177 ✗ if (apic) {
1178 ✗ int size = pls->ctx->streams[1]->attached_pic.size;
1179 ✗ if (size != apic->buf->size - AV_INPUT_BUFFER_PADDING_SIZE)
1180 ✗ return 1;
1181
1182 ✗ if (memcmp(apic->buf->data, pls->ctx->streams[1]->attached_pic.data, size) != 0)
1183 ✗ return 1;
1184 }
1185
1186 ✗ return 0;
1187 }
1188
1189 /* Parse ID3 data and handle the found data */
1190 ✗ static void handle_id3(AVIOContext *pb, struct playlist *pls)
1191 {
1192 ✗ AVDictionary *metadata = NULL;
1193 ✗ ID3v2ExtraMetaAPIC *apic = NULL;
1194 ✗ ID3v2ExtraMeta *extra_meta = NULL;
1195 ✗ int64_t timestamp = AV_NOPTS_VALUE;
1196
1197 ✗ parse_id3(pls->ctx, pb, &metadata, &timestamp, &pls->audio_setup_info, &apic, &extra_meta);
1198
1199 ✗ if (timestamp != AV_NOPTS_VALUE) {
1200 ✗ pls->id3_mpegts_timestamp = timestamp;
1201 ✗ pls->id3_offset = 0;
1202 }
1203
1204 ✗ if (!pls->id3_found) {
1205 /* initial ID3 tags */
1206 ✗ av_assert0(!pls->id3_deferred_extra);
1207 ✗ pls->id3_found = 1;
1208
1209 /* get picture attachment and set text metadata */
1210 ✗ if (pls->ctx->nb_streams)
1211 ✗ ff_id3v2_parse_apic(pls->ctx, extra_meta);
1212 else
1213 /* demuxer not yet opened, defer picture attachment */
1214 ✗ pls->id3_deferred_extra = extra_meta;
1215
1216 ✗ ff_id3v2_parse_priv_dict(&metadata, extra_meta);
1217 ✗ av_dict_copy(&pls->ctx->metadata, metadata, 0);
1218 ✗ pls->id3_initial = metadata;
1219
1220 } else {
1221 ✗ if (!pls->id3_changed && id3_has_changed_values(pls, metadata, apic)) {
1222 ✗ avpriv_report_missing_feature(pls->parent, "Changing ID3 metadata in HLS audio elementary stream");
1223 ✗ pls->id3_changed = 1;
1224 }
1225 ✗ av_dict_free(&metadata);
1226 }
1227
1228 ✗ if (!pls->id3_deferred_extra)
1229 ✗ ff_id3v2_free_extra_meta(&extra_meta);
1230 ✗ }
1231
1232 12 static void intercept_id3(struct playlist *pls, uint8_t *buf,
1233 int buf_size, int *len)
1234 {
1235 /* intercept id3 tags, we do not want to pass them to the raw
1236 * demuxer on all segment switches */
1237 int bytes;
1238 12 int id3_buf_pos = 0;
1239 12 int fill_buf = 0;
1240 12 struct segment *seg = current_segment(pls);
1241
1242 /* gather all the id3 tags */
1243 while (1) {
1244 /* see if we can retrieve enough data for ID3 header */
1245
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 12 if (*len < ID3v2_HEADER_SIZE && buf_size >= ID3v2_HEADER_SIZE) {
1246 ✗ bytes = read_from_url(pls, seg, buf + *len, ID3v2_HEADER_SIZE - *len);
1247 ✗ if (bytes > 0) {
1248
1249 ✗ if (bytes == ID3v2_HEADER_SIZE - *len)
1250 /* no EOF yet, so fill the caller buffer again after
1251 * we have stripped the ID3 tags */
1252 ✗ fill_buf = 1;
1253
1254 ✗ *len += bytes;
1255
1256 ✗ } else if (*len <= 0) {
1257 /* error/EOF */
1258 ✗ *len = bytes;
1259 ✗ fill_buf = 0;
1260 }
1261 }
1262
1263
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 12 if (*len < ID3v2_HEADER_SIZE)
1264 ✗ break;
1265
1266
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 12 if (ff_id3v2_match(buf, ID3v2_DEFAULT_MAGIC)) {
1267 ✗ int64_t maxsize = seg->size >= 0 ? seg->size : 1024*1024;
1268 ✗ int taglen = ff_id3v2_tag_len(buf);
1269 ✗ int tag_got_bytes = FFMIN(taglen, *len);
1270 ✗ int remaining = taglen - tag_got_bytes;
1271
1272 ✗ if (taglen > maxsize) {
1273 ✗ av_log(pls->parent, AV_LOG_ERROR, "Too large HLS ID3 tag (%d > %"PRId64" bytes)\n",
1274 taglen, maxsize);
1275 ✗ break;
1276 }
1277
1278 /*
1279 * Copy the id3 tag to our temporary id3 buffer.
1280 * We could read a small id3 tag directly without memcpy, but
1281 * we would still need to copy the large tags, and handling
1282 * both of those cases together with the possibility for multiple
1283 * tags would make the handling a bit complex.
1284 */
1285 ✗ pls->id3_buf = av_fast_realloc(pls->id3_buf, &pls->id3_buf_size, id3_buf_pos + taglen);
1286 ✗ if (!pls->id3_buf)
1287 ✗ break;
1288 ✗ memcpy(pls->id3_buf + id3_buf_pos, buf, tag_got_bytes);
1289 ✗ id3_buf_pos += tag_got_bytes;
1290
1291 /* strip the intercepted bytes */
1292 ✗ *len -= tag_got_bytes;
1293 ✗ memmove(buf, buf + tag_got_bytes, *len);
1294 ✗ av_log(pls->parent, AV_LOG_DEBUG, "Stripped %d HLS ID3 bytes\n", tag_got_bytes);
1295
1296 ✗ if (remaining > 0) {
1297 /* read the rest of the tag in */
1298 ✗ if (read_from_url(pls, seg, pls->id3_buf + id3_buf_pos, remaining) != remaining)
1299 ✗ break;
1300 ✗ id3_buf_pos += remaining;
1301 ✗ av_log(pls->parent, AV_LOG_DEBUG, "Stripped additional %d HLS ID3 bytes\n", remaining);
1302 }
1303
1304 } else {
1305 /* no more ID3 tags */
1306 12 break;
1307 }
1308 }
1309
1310 /* re-fill buffer for the caller unless EOF */
1311
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 12 if (*len >= 0 && (fill_buf || *len == 0)) {
1312 ✗ bytes = read_from_url(pls, seg, buf + *len, buf_size - *len);
1313
1314 /* ignore error if we already had some data */
1315 ✗ if (bytes >= 0)
1316 ✗ *len += bytes;
1317 ✗ else if (*len == 0)
1318 ✗ *len = bytes;
1319 }
1320
1321
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 12 if (pls->id3_buf) {
1322 /* Now parse all the ID3 tags */
1323 FFIOContext id3ioctx;
1324 ✗ ffio_init_read_context(&id3ioctx, pls->id3_buf, id3_buf_pos);
1325 ✗ handle_id3(&id3ioctx.pub, pls);
1326 }
1327
1328
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 12 if (pls->is_id3_timestamped == -1)
1329 12 pls->is_id3_timestamped = (pls->id3_mpegts_timestamp != AV_NOPTS_VALUE);
1330 12 }
1331
1332 61 static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg, AVIOContext **in)
1333 {
1334 61 AVDictionary *opts = NULL;
1335 int ret;
1336 61 int is_http = 0;
1337
1338
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 61 if (c->http_persistent)
1339 61 av_dict_set(&opts, "multiple_requests", "1", 0);
1340
1341
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 61 if (seg->size >= 0) {
1342 /* try to restrict the HTTP request to the part we want
1343 * (if this is in fact a HTTP request) */
1344 20 av_dict_set_int(&opts, "offset", seg->url_offset, 0);
1345 20 av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
1346 }
1347
1348 61 av_log(pls->parent, AV_LOG_VERBOSE, "HLS request for url '%s', offset %"PRId64", playlist %d\n",
1349 seg->url, seg->url_offset, pls->index);
1350
1351
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 61 if (seg->key_type == KEY_AES_128 || seg->key_type == KEY_SAMPLE_AES) {
1352 ✗ if (strcmp(seg->key, pls->key_url)) {
1353 ✗ AVIOContext *pb = NULL;
1354 ✗ if (open_url(pls->parent, &pb, seg->key, &c->avio_opts, opts, NULL) == 0) {
1355 ✗ ret = avio_read(pb, pls->key, sizeof(pls->key));
1356 ✗ if (ret != sizeof(pls->key)) {
1357 ✗ av_log(pls->parent, AV_LOG_ERROR, "Unable to read key file %s\n",
1358 seg->key);
1359 }
1360 ✗ ff_format_io_close(pls->parent, &pb);
1361 } else {
1362 ✗ av_log(pls->parent, AV_LOG_ERROR, "Unable to open key file %s\n",
1363 seg->key);
1364 }
1365 ✗ av_strlcpy(pls->key_url, seg->key, sizeof(pls->key_url));
1366 }
1367 }
1368
1369
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 61 if (seg->key_type == KEY_AES_128) {
1370 char iv[33], key[33], url[MAX_URL_SIZE];
1371 ✗ ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
1372 ✗ ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
1373 ✗ if (strstr(seg->url, "://"))
1374 ✗ snprintf(url, sizeof(url), "crypto+%s", seg->url);
1375 else
1376 ✗ snprintf(url, sizeof(url), "crypto:%s", seg->url);
1377
1378 ✗ av_dict_set(&opts, "key", key, 0);
1379 ✗ av_dict_set(&opts, "iv", iv, 0);
1380
1381 ✗ ret = open_url(pls->parent, in, url, &c->avio_opts, opts, &is_http);
1382 ✗ if (ret < 0) {
1383 ✗ goto cleanup;
1384 }
1385 ✗ ret = 0;
1386 } else {
1387 61 ret = open_url(pls->parent, in, seg->url, &c->avio_opts, opts, &is_http);
1388 }
1389
1390 /* Seek to the requested position. If this was a HTTP request, the offset
1391 * should already be where want it to, but this allows e.g. local testing
1392 * without a HTTP server.
1393 *
1394 * This is not done for HTTP at all as avio_seek() does internal bookkeeping
1395 * of file offset which is out-of-sync with the actual offset when "offset"
1396 * AVOption is used with http protocol, causing the seek to not be a no-op
1397 * as would be expected. Wrong offset received from the server will not be
1398 * noticed without the call, though.
1399 */
1400
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 61 if (ret == 0 && !is_http && seg->url_offset) {
1401 15 int64_t seekret = avio_seek(*in, seg->url_offset, SEEK_SET);
1402
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 15 if (seekret < 0) {
1403 ✗ av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of HLS segment '%s'\n", seg->url_offset, seg->url);
1404 ✗ ret = seekret;
1405 ✗ ff_format_io_close(pls->parent, in);
1406 }
1407 }
1408
1409 61 cleanup:
1410 61 av_dict_free(&opts);
1411 61 pls->cur_seg_offset = 0;
1412 61 return ret;
1413 }
1414
1415 61 static int update_init_section(struct playlist *pls, struct segment *seg)
1416 {
1417 static const int max_init_section_size = 1024*1024;
1418 61 HLSContext *c = pls->parent->priv_data;
1419 int64_t sec_size;
1420 int64_t urlsize;
1421 int ret;
1422
1423
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 61 if (seg->init_section == pls->cur_init_section)
1424 61 return 0;
1425
1426 ✗ pls->cur_init_section = NULL;
1427
1428 ✗ if (!seg->init_section)
1429 ✗ return 0;
1430
1431 ✗ ret = open_input(c, pls, seg->init_section, &pls->input);
1432 ✗ if (ret < 0) {
1433 ✗ av_log(pls->parent, AV_LOG_WARNING,
1434 "Failed to open an initialization section in playlist %d\n",
1435 pls->index);
1436 ✗ return ret;
1437 }
1438
1439 ✗ if (seg->init_section->size >= 0)
1440 ✗ sec_size = seg->init_section->size;
1441 ✗ else if ((urlsize = avio_size(pls->input)) >= 0)
1442 ✗ sec_size = urlsize;
1443 else
1444 ✗ sec_size = max_init_section_size;
1445
1446 ✗ av_log(pls->parent, AV_LOG_DEBUG,
1447 "Downloading an initialization section of size %"PRId64"\n",
1448 sec_size);
1449
1450 ✗ sec_size = FFMIN(sec_size, max_init_section_size);
1451
1452 ✗ av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
1453
1454 ✗ ret = read_from_url(pls, seg->init_section, pls->init_sec_buf,
1455 ✗ pls->init_sec_buf_size);
1456 ✗ ff_format_io_close(pls->parent, &pls->input);
1457
1458 ✗ if (ret < 0)
1459 ✗ return ret;
1460
1461 ✗ pls->cur_init_section = seg->init_section;
1462 ✗ pls->init_sec_data_len = ret;
1463 ✗ pls->init_sec_buf_read_offset = 0;
1464
1465 /* spec says audio elementary streams do not have media initialization
1466 * sections, so there should be no ID3 timestamps */
1467 ✗ pls->is_id3_timestamped = 0;
1468
1469 ✗ return 0;
1470 }
1471
1472 95 static int64_t default_reload_interval(struct playlist *pls)
1473 {
1474 95 return pls->n_segments > 0 ?
1475
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 95 pls->segments[pls->n_segments - 1]->duration :
1476 pls->target_duration;
1477 }
1478
1479 6463 static int playlist_needed(struct playlist *pls)
1480 {
1481 6463 AVFormatContext *s = pls->parent;
1482 int i, j;
1483 6463 int stream_needed = 0;
1484 int first_st;
1485
1486 /* If there is no context or streams yet, the playlist is needed */
1487
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 6463 if (!pls->ctx || !pls->n_main_streams)
1488 12 return 1;
1489
1490 /* check if any of the streams in the playlist are needed */
1491
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 6451 for (i = 0; i < pls->n_main_streams; i++) {
1492
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 6451 if (pls->main_streams[i]->discard < AVDISCARD_ALL) {
1493 6451 stream_needed = 1;
1494 6451 break;
1495 }
1496 }
1497
1498 /* If all streams in the playlist were discarded, the playlist is not
1499 * needed (regardless of whether whole programs are discarded or not). */
1500
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 6451 if (!stream_needed)
1501 ✗ return 0;
1502
1503 /* Otherwise, check if all the programs (variants) this playlist is in are
1504 * discarded. Since all streams in the playlist are part of the same programs
1505 * we can just check the programs of the first stream. */
1506
1507 6451 first_st = pls->main_streams[0]->index;
1508
1509
1/2
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 6451 for (i = 0; i < s->nb_programs; i++) {
1510 6451 AVProgram *program = s->programs[i];
1511
1/2
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 6451 if (program->discard < AVDISCARD_ALL) {
1512
1/2
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 6451 for (j = 0; j < program->nb_stream_indexes; j++) {
1513
1/2
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 6451 if (program->stream_index[j] == first_st) {
1514 /* playlist is in an undiscarded program */
1515 6451 return 1;
1516 }
1517 }
1518 }
1519 }
1520
1521 /* some streams were not discarded but all the programs were */
1522 ✗ return 0;
1523 }
1524
1525 341 static int read_data(void *opaque, uint8_t *buf, int buf_size)
1526 {
1527 341 struct playlist *v = opaque;
1528 341 HLSContext *c = v->parent->priv_data;
1529 int ret;
1530 341 int just_opened = 0;
1531 341 int reload_count = 0;
1532 341 int segment_retries = 0;
1533 struct segment *seg;
1534
1535 400 restart:
1536
1/2
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 400 if (!v->needed)
1537 ✗ return AVERROR_EOF;
1538
1539
4/6
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 400 if (!v->input || (c->http_persistent && v->input_read_done)) {
1540 int64_t reload_interval;
1541
1542 /* Check that the playlist is still needed before opening a new
1543 * segment. */
1544 95 v->needed = playlist_needed(v);
1545
1546
1/2
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 95 if (!v->needed) {
1547 ✗ av_log(v->parent, AV_LOG_INFO, "No longer receiving playlist %d ('%s')\n",
1548 ✗ v->index, v->url);
1549 ✗ return AVERROR_EOF;
1550 }
1551
1552 /* If this is a live stream and the reload interval has elapsed since
1553 * the last playlist reload, reload the playlists now. */
1554 95 reload_interval = default_reload_interval(v);
1555
1556 ✗ reload:
1557 95 reload_count++;
1558
1/2
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 95 if (reload_count > c->max_reload)
1559 ✗ return AVERROR_EOF;
1560
2/2
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 95 if (!v->finished &&
1561
1/2
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 3 av_gettime_relative() - v->last_load_time >= reload_interval) {
1562 ✗ if ((ret = parse_playlist(c, v->url, v, NULL)) < 0) {
1563 ✗ if (ret != AVERROR_EXIT)
1564 ✗ av_log(v->parent, AV_LOG_WARNING, "Failed to reload playlist %d\n",
1565 v->index);
1566 ✗ return ret;
1567 }
1568 /* If we need to reload the playlist again below (if
1569 * there's still no more segments), switch to a reload
1570 * interval of half the target duration. */
1571 ✗ reload_interval = v->target_duration / 2;
1572 }
1573
1/2
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 95 if (v->cur_seq_no < v->start_seq_no) {
1574 ✗ av_log(v->parent, AV_LOG_WARNING,
1575 "skipping %"PRId64" segments ahead, expired from playlists\n",
1576 ✗ v->start_seq_no - v->cur_seq_no);
1577 ✗ v->cur_seq_no = v->start_seq_no;
1578 }
1579
2/2
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 95 if (v->cur_seq_no > v->last_seq_no) {
1580 63 v->last_seq_no = v->cur_seq_no;
1581 63 v->m3u8_hold_counters = 0;
1582
1/2
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✗ Branch 1 not taken.
 32 } else if (v->last_seq_no == v->cur_seq_no) {
1583 32 v->m3u8_hold_counters++;
1584
1/2
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✓ Branch 1 taken 32 times.
 32 if (v->m3u8_hold_counters >= c->m3u8_hold_counters) {
1585 ✗ return AVERROR_EOF;
1586 }
1587 } else {
1588 ✗ av_log(v->parent, AV_LOG_WARNING, "The m3u8 list sequence may have been wrapped.\n");
1589 }
1590
2/2
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 95 if (v->cur_seq_no >= v->start_seq_no + v->n_segments) {
1591
1/2
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 34 if (v->finished)
1592 34 return AVERROR_EOF;
1593 ✗ while (av_gettime_relative() - v->last_load_time < reload_interval) {
1594 ✗ if (ff_check_interrupt(c->interrupt_callback))
1595 ✗ return AVERROR_EXIT;
1596 ✗ av_usleep(100*1000);
1597 }
1598 /* Enough time has elapsed since the last reload */
1599 ✗ goto reload;
1600 }
1601
1602 61 v->input_read_done = 0;
1603 61 seg = current_segment(v);
1604
1605 /* load/update Media Initialization Section, if any */
1606 61 ret = update_init_section(v, seg);
1607
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 61 if (ret)
1608 ✗ return ret;
1609
1610
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 61 if (c->http_multiple == 1 && v->input_next_requested) {
1611 ✗ FFSWAP(AVIOContext *, v->input, v->input_next);
1612 ✗ v->cur_seg_offset = 0;
1613 ✗ v->input_next_requested = 0;
1614 ✗ ret = 0;
1615 } else {
1616 61 ret = open_input(c, v, seg, &v->input);
1617 }
1618
1/2
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✓ Branch 1 taken 61 times.
 61 if (ret < 0) {
1619 ✗ if (ff_check_interrupt(c->interrupt_callback))
1620 ✗ return AVERROR_EXIT;
1621 ✗ av_log(v->parent, AV_LOG_WARNING, "Failed to open segment %"PRId64" of playlist %d\n",
1622 v->cur_seq_no,
1623 v->index);
1624 ✗ if (segment_retries >= c->seg_max_retry) {
1625 ✗ av_log(v->parent, AV_LOG_WARNING, "Segment %"PRId64" of playlist %d failed too many times, skipping\n",
1626 v->cur_seq_no,
1627 v->index);
1628 ✗ v->cur_seq_no++;
1629 ✗ segment_retries = 0;
1630 } else {
1631 ✗ segment_retries++;
1632 }
1633 ✗ goto reload;
1634 }
1635 61 segment_retries = 0;
1636 61 just_opened = 1;
1637 }
1638
1639
1/2
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 366 if (c->http_multiple == -1) {
1640 366 uint8_t *http_version_opt = NULL;
1641 366 int r = av_opt_get(v->input, "http_version", AV_OPT_SEARCH_CHILDREN, &http_version_opt);
1642
1/2
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✓ Branch 1 taken 366 times.
 366 if (r >= 0) {
1643 ✗ c->http_multiple = (!strncmp((const char *)http_version_opt, "1.1", 3) || !strncmp((const char *)http_version_opt, "2.0", 3));
1644 ✗ av_freep(&http_version_opt);
1645 }
1646 }
1647
1648 366 seg = next_segment(v);
1649
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 366 if (c->http_multiple == 1 && !v->input_next_requested &&
1650 ✗ seg && seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1651 ✗ ret = open_input(c, v, seg, &v->input_next);
1652 ✗ if (ret < 0) {
1653 ✗ if (ff_check_interrupt(c->interrupt_callback))
1654 ✗ return AVERROR_EXIT;
1655 ✗ av_log(v->parent, AV_LOG_WARNING, "Failed to open segment %"PRId64" of playlist %d\n",
1656 ✗ v->cur_seq_no + 1,
1657 v->index);
1658 } else {
1659 ✗ v->input_next_requested = 1;
1660 }
1661 }
1662
1663
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 366 if (v->init_sec_buf_read_offset < v->init_sec_data_len) {
1664 /* Push init section out first before first actual segment */
1665 ✗ int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
1666 ✗ memcpy(buf, v->init_sec_buf, copy_size);
1667 ✗ v->init_sec_buf_read_offset += copy_size;
1668 ✗ return copy_size;
1669 }
1670
1671 366 seg = current_segment(v);
1672 366 ret = read_from_url(v, seg, buf, buf_size);
1673
2/2
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 366 if (ret > 0) {
1674
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✓ Branch 3 taken 49 times.
 307 if (just_opened && v->is_id3_timestamped != 0) {
1675 /* Intercept ID3 tags here, elementary audio streams are required
1676 * to convey timestamps using them in the beginning of each segment. */
1677 12 intercept_id3(v, buf, buf_size, &ret);
1678 }
1679
1680 307 return ret;
1681 }
1682
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 59 if (c->http_persistent &&
1683
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✓ Branch 4 taken 59 times.
 59 seg->key_type == KEY_NONE && av_strstart(seg->url, "http", NULL)) {
1684 ✗ v->input_read_done = 1;
1685 } else {
1686 59 ff_format_io_close(v->parent, &v->input);
1687 }
1688 59 v->cur_seq_no++;
1689
1690 59 c->cur_seq_no = v->cur_seq_no;
1691
1692 59 goto restart;
1693 }
1694
1695 ✗ static void add_renditions_to_variant(HLSContext *c, struct variant *var,
1696 enum AVMediaType type, const char *group_id)
1697 {
1698 int i;
1699
1700 ✗ for (i = 0; i < c->n_renditions; i++) {
1701 ✗ struct rendition *rend = c->renditions[i];
1702
1703 ✗ if (rend->type == type && !strcmp(rend->group_id, group_id)) {
1704
1705 ✗ if (rend->playlist)
1706 /* rendition is an external playlist
1707 * => add the playlist to the variant */
1708 ✗ dynarray_add(&var->playlists, &var->n_playlists, rend->playlist);
1709 else
1710 /* rendition is part of the variant main Media Playlist
1711 * => add the rendition to the main Media Playlist */
1712 ✗ dynarray_add(&var->playlists[0]->renditions,
1713 &var->playlists[0]->n_renditions,
1714 rend);
1715 }
1716 }
1717 ✗ }
1718
1719 36 static void add_metadata_from_renditions(AVFormatContext *s, struct playlist *pls,
1720 enum AVMediaType type)
1721 {
1722 36 int rend_idx = 0;
1723 int i;
1724
1725
2/2
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 60 for (i = 0; i < pls->n_main_streams; i++) {
1726 36 AVStream *st = pls->main_streams[i];
1727
1728
2/2
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 36 if (st->codecpar->codec_type != type)
1729 24 continue;
1730
1731
1/2
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 12 for (; rend_idx < pls->n_renditions; rend_idx++) {
1732 ✗ struct rendition *rend = pls->renditions[rend_idx];
1733
1734 ✗ if (rend->type != type)
1735 ✗ continue;
1736
1737 ✗ if (rend->language[0])
1738 ✗ av_dict_set(&st->metadata, "language", rend->language, 0);
1739 ✗ if (rend->name[0])
1740 ✗ av_dict_set(&st->metadata, "comment", rend->name, 0);
1741
1742 ✗ st->disposition |= rend->disposition;
1743 }
1744
1/2
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 12 if (rend_idx >=pls->n_renditions)
1745 12 break;
1746 }
1747 36 }
1748
1749 /* if timestamp was in valid range: returns 1 and sets seq_no
1750 * if not: returns 0 and sets seq_no to closest segment */
1751 ✗ static int find_timestamp_in_playlist(HLSContext *c, struct playlist *pls,
1752 int64_t timestamp, int64_t *seq_no,
1753 int64_t *seg_start_ts)
1754 {
1755 int i;
1756 ✗ int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ?
1757 ✗ 0 : c->first_timestamp;
1758
1759 ✗ if (timestamp < pos) {
1760 ✗ *seq_no = pls->start_seq_no;
1761 ✗ return 0;
1762 }
1763
1764 ✗ for (i = 0; i < pls->n_segments; i++) {
1765 ✗ int64_t diff = pos + pls->segments[i]->duration - timestamp;
1766 ✗ if (diff > 0) {
1767 ✗ *seq_no = pls->start_seq_no + i;
1768 ✗ if (seg_start_ts) {
1769 ✗ *seg_start_ts = pos;
1770 }
1771 ✗ return 1;
1772 }
1773 ✗ pos += pls->segments[i]->duration;
1774 }
1775
1776 ✗ *seq_no = pls->start_seq_no + pls->n_segments - 1;
1777
1778 ✗ return 0;
1779 }
1780
1781 12 static int64_t select_cur_seq_no(HLSContext *c, struct playlist *pls)
1782 {
1783 int64_t seq_no;
1784
1785
3/6
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 12 if (!pls->finished && !c->first_packet &&
1786 ✗ av_gettime_relative() - pls->last_load_time >= default_reload_interval(pls))
1787 /* reload the playlist since it was suspended */
1788 ✗ parse_playlist(c, pls->url, pls, NULL);
1789
1790 /* If playback is already in progress (we are just selecting a new
1791 * playlist) and this is a complete file, find the matching segment
1792 * by counting durations. */
1793
3/4
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 12 if (pls->finished && c->cur_timestamp != AV_NOPTS_VALUE) {
1794 ✗ find_timestamp_in_playlist(c, pls, c->cur_timestamp, &seq_no, NULL);
1795 ✗ return seq_no;
1796 }
1797
1798
2/2
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 12 if (!pls->finished) {
1799
1/2
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 1 if (!c->first_packet && /* we are doing a segment selection during playback */
1800 ✗ c->cur_seq_no >= pls->start_seq_no &&
1801 ✗ c->cur_seq_no < pls->start_seq_no + pls->n_segments)
1802 /* While spec 3.4.3 says that we cannot assume anything about the
1803 * content at the same sequence number on different playlists,
1804 * in practice this seems to work and doing it otherwise would
1805 * require us to download a segment to inspect its timestamps. */
1806 ✗ return c->cur_seq_no;
1807
1808 /* If this is a live stream, start live_start_index segments from the
1809 * start or end */
1810
1/2
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 1 if (c->live_start_index < 0)
1811 1 seq_no = pls->start_seq_no + FFMAX(pls->n_segments +
1812 c->live_start_index, 0);
1813 else
1814 ✗ seq_no = pls->start_seq_no + FFMIN(c->live_start_index,
1815 pls->n_segments - 1);
1816
1817 /* If #EXT-X-START in playlist, need to recalculate */
1818
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 1 if (pls->time_offset_flag && c->prefer_x_start) {
1819 int64_t start_timestamp;
1820 ✗ int64_t playlist_duration = 0;
1821 ✗ int64_t cur_timestamp = c->cur_timestamp == AV_NOPTS_VALUE ? 0 :
1822 c->cur_timestamp;
1823
1824 ✗ for (int i = 0; i < pls->n_segments; i++)
1825 ✗ playlist_duration += pls->segments[i]->duration;
1826
1827 /* If the absolute value of TIME-OFFSET exceeds
1828 * the duration of the playlist, it indicates either the end of the
1829 * playlist (if positive) or the beginning of the playlist (if
1830 * negative). */
1831 ✗ if (pls->start_time_offset >=0 &&
1832 ✗ pls->start_time_offset > playlist_duration)
1833 ✗ start_timestamp = cur_timestamp + playlist_duration;
1834 ✗ else if (pls->start_time_offset >= 0 &&
1835 ✗ pls->start_time_offset <= playlist_duration)
1836 ✗ start_timestamp = cur_timestamp + pls->start_time_offset;
1837 ✗ else if (pls->start_time_offset < 0 &&
1838 ✗ pls->start_time_offset < -playlist_duration)
1839 ✗ start_timestamp = cur_timestamp;
1840 ✗ else if (pls->start_time_offset < 0 &&
1841 ✗ pls->start_time_offset > -playlist_duration)
1842 ✗ start_timestamp = cur_timestamp + playlist_duration +
1843 ✗ pls->start_time_offset;
1844 else
1845 ✗ start_timestamp = cur_timestamp;
1846
1847 ✗ find_timestamp_in_playlist(c, pls, start_timestamp, &seq_no, NULL);
1848 }
1849 1 return seq_no;
1850 }
1851
1852 /* Otherwise just start on the first segment. */
1853 11 return pls->start_seq_no;
1854 }
1855
1856 ✗ static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
1857 int flags, AVDictionary **opts)
1858 {
1859 ✗ av_log(s, AV_LOG_ERROR,
1860 "A HLS playlist item '%s' referred to an external file '%s'. "
1861 "Opening this file was forbidden for security reasons\n",
1862 s->url, url);
1863 ✗ return AVERROR(EPERM);
1864 }
1865
1866 12 static void add_stream_to_programs(AVFormatContext *s, struct playlist *pls, AVStream *stream)
1867 {
1868 12 HLSContext *c = s->priv_data;
1869 int i, j;
1870 12 int bandwidth = -1;
1871
1872
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 24 for (i = 0; i < c->n_variants; i++) {
1873 12 struct variant *v = c->variants[i];
1874
1875
2/2
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 24 for (j = 0; j < v->n_playlists; j++) {
1876
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 12 if (v->playlists[j] != pls)
1877 ✗ continue;
1878
1879 12 av_program_add_stream_index(s, i, stream->index);
1880
1881
1/2
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 12 if (bandwidth < 0)
1882 12 bandwidth = v->bandwidth;
1883 ✗ else if (bandwidth != v->bandwidth)
1884 ✗ bandwidth = -1; /* stream in multiple variants with different bandwidths */
1885 }
1886 }
1887
1888
1/2
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 12 if (bandwidth >= 0)
1889 12 av_dict_set_int(&stream->metadata, "variant_bitrate", bandwidth, 0);
1890 12 }
1891
1892 22 static int set_stream_info_from_input_stream(AVStream *st, struct playlist *pls, AVStream *ist)
1893 {
1894 int err;
1895
1896 22 err = avcodec_parameters_copy(st->codecpar, ist->codecpar);
1897
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 22 if (err < 0)
1898 ✗ return err;
1899
1900
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 22 if (pls->is_id3_timestamped) /* custom timestamps via id3 */
1901 ✗ avpriv_set_pts_info(st, 33, 1, MPEG_TIME_BASE);
1902 else
1903 22 avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, ist->time_base.den);
1904
1905 // copy disposition
1906 22 st->disposition = ist->disposition;
1907
1908 22 av_dict_copy(&st->metadata, ist->metadata, 0);
1909
1910 22 ffstream(st)->need_context_update = 1;
1911
1912 22 return 0;
1913 }
1914
1915 /* add new subdemuxer streams to our context, if any */
1916 6369 static int update_streams_from_subdemuxer(AVFormatContext *s, struct playlist *pls)
1917 {
1918 int err;
1919
1920
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 6381 while (pls->n_main_streams < pls->ctx->nb_streams) {
1921 12 int ist_idx = pls->n_main_streams;
1922 12 AVStream *st = avformat_new_stream(s, NULL);
1923 12 AVStream *ist = pls->ctx->streams[ist_idx];
1924
1925
1/2
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✓ Branch 1 taken 12 times.
 12 if (!st)
1926 ✗ return AVERROR(ENOMEM);
1927
1928 12 st->id = pls->index;
1929 12 dynarray_add(&pls->main_streams, &pls->n_main_streams, st);
1930
1931 12 add_stream_to_programs(s, pls, st);
1932
1933 12 err = set_stream_info_from_input_stream(st, pls, ist);
1934
1/2
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 12 if (err < 0)
1935 ✗ return err;
1936 }
1937
1938 6369 return 0;
1939 }
1940
1941 23 static void update_noheader_flag(AVFormatContext *s)
1942 {
1943 23 HLSContext *c = s->priv_data;
1944 23 int flag_needed = 0;
1945 int i;
1946
1947
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 35 for (i = 0; i < c->n_playlists; i++) {
1948 23 struct playlist *pls = c->playlists[i];
1949
1950
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 23 if (pls->has_noheader_flag) {
1951 11 flag_needed = 1;
1952 11 break;
1953 }
1954 }
1955
1956
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 23 if (flag_needed)
1957 11 s->ctx_flags |= AVFMTCTX_NOHEADER;
1958 else
1959 12 s->ctx_flags &= ~AVFMTCTX_NOHEADER;
1960 23 }
1961
1962 12 static int hls_close(AVFormatContext *s)
1963 {
1964 12 HLSContext *c = s->priv_data;
1965
1966 12 free_playlist_list(c);
1967 12 free_variant_list(c);
1968 12 free_rendition_list(c);
1969
1970
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 12 if (c->crypto_ctx.aes_ctx)
1971 ✗ av_free(c->crypto_ctx.aes_ctx);
1972
1973 12 av_dict_free(&c->avio_opts);
1974 12 ff_format_io_close(c->ctx, &c->playlist_pb);
1975
1976 12 return 0;
1977 }
1978
1979 12 static int hls_read_header(AVFormatContext *s)
1980 {
1981 12 HLSContext *c = s->priv_data;
1982 12 int ret = 0, i;
1983 12 int64_t highest_cur_seq_no = 0;
1984
1985 12 c->ctx = s;
1986 12 c->interrupt_callback = &s->interrupt_callback;
1987
1988 12 c->first_packet = 1;
1989 12 c->first_timestamp = AV_NOPTS_VALUE;
1990 12 c->cur_timestamp = AV_NOPTS_VALUE;
1991
1992
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 12 if ((ret = ffio_copy_url_options(s->pb, &c->avio_opts)) < 0)
1993 ✗ return ret;
1994
1995 /* XXX: Some HLS servers don't like being sent the range header,
1996 in this case, need to setting http_seekable = 0 to disable
1997 the range header */
1998 12 av_dict_set_int(&c->avio_opts, "seekable", c->http_seekable, 0);
1999
2000
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 12 if ((ret = parse_playlist(c, s->url, NULL, s->pb)) < 0)
2001 ✗ return ret;
2002
2003
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 12 if (c->n_variants == 0) {
2004 ✗ av_log(s, AV_LOG_WARNING, "Empty playlist\n");
2005 ✗ return AVERROR_EOF;
2006 }
2007 /* If the playlist only contained playlists (Master Playlist),
2008 * parse each individual playlist. */
2009
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 12 if (c->n_playlists > 1 || c->playlists[0]->n_segments == 0) {
2010 ✗ for (i = 0; i < c->n_playlists; i++) {
2011 ✗ struct playlist *pls = c->playlists[i];
2012 ✗ pls->m3u8_hold_counters = 0;
2013 ✗ if ((ret = parse_playlist(c, pls->url, pls, NULL)) < 0) {
2014 ✗ av_log(s, AV_LOG_WARNING, "parse_playlist error %s [%s]\n", av_err2str(ret), pls->url);
2015 ✗ pls->broken = 1;
2016 ✗ if (c->n_playlists > 1)
2017 ✗ continue;
2018 ✗ return ret;
2019 }
2020 }
2021 }
2022
2023
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 24 for (i = 0; i < c->n_variants; i++) {
2024
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 12 if (c->variants[i]->playlists[0]->n_segments == 0) {
2025 ✗ av_log(s, AV_LOG_WARNING, "Empty segment [%s]\n", c->variants[i]->playlists[0]->url);
2026 ✗ c->variants[i]->playlists[0]->broken = 1;
2027 }
2028 }
2029
2030 /* If this isn't a live stream, calculate the total duration of the
2031 * stream. */
2032
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 12 if (c->variants[0]->playlists[0]->finished) {
2033 11 int64_t duration = 0;
2034
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 71 for (i = 0; i < c->variants[0]->playlists[0]->n_segments; i++)
2035 60 duration += c->variants[0]->playlists[0]->segments[i]->duration;
2036 11 s->duration = duration;
2037 }
2038
2039 /* Associate renditions with variants */
2040
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 24 for (i = 0; i < c->n_variants; i++) {
2041 12 struct variant *var = c->variants[i];
2042
2043
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 12 if (var->audio_group[0])
2044 ✗ add_renditions_to_variant(c, var, AVMEDIA_TYPE_AUDIO, var->audio_group);
2045
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 12 if (var->video_group[0])
2046 ✗ add_renditions_to_variant(c, var, AVMEDIA_TYPE_VIDEO, var->video_group);
2047
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 12 if (var->subtitles_group[0])
2048 ✗ add_renditions_to_variant(c, var, AVMEDIA_TYPE_SUBTITLE, var->subtitles_group);
2049 }
2050
2051 /* Create a program for each variant */
2052
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 24 for (i = 0; i < c->n_variants; i++) {
2053 12 struct variant *v = c->variants[i];
2054 AVProgram *program;
2055
2056 12 program = av_new_program(s, i);
2057
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 12 if (!program)
2058 ✗ return AVERROR(ENOMEM);
2059 12 av_dict_set_int(&program->metadata, "variant_bitrate", v->bandwidth, 0);
2060 }
2061
2062 /* Select the starting segments */
2063
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 24 for (i = 0; i < c->n_playlists; i++) {
2064 12 struct playlist *pls = c->playlists[i];
2065
2066
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 12 if (pls->n_segments == 0)
2067 ✗ continue;
2068
2069 12 pls->cur_seq_no = select_cur_seq_no(c, pls);
2070 12 highest_cur_seq_no = FFMAX(highest_cur_seq_no, pls->cur_seq_no);
2071 }
2072
2073 /* Open the demuxer for each playlist */
2074
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 24 for (i = 0; i < c->n_playlists; i++) {
2075 12 struct playlist *pls = c->playlists[i];
2076 12 const AVInputFormat *in_fmt = NULL;
2077 char *url;
2078 12 AVDictionary *options = NULL;
2079 12 struct segment *seg = NULL;
2080
2081
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 12 if (!(pls->ctx = avformat_alloc_context()))
2082 ✗ return AVERROR(ENOMEM);
2083
2084
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 12 if (pls->n_segments == 0)
2085 ✗ continue;
2086
2087 12 pls->index = i;
2088 12 pls->needed = 1;
2089 12 pls->parent = s;
2090
2091 /*
2092 * If this is a live stream and this playlist looks like it is one segment
2093 * behind, try to sync it up so that every substream starts at the same
2094 * time position (so e.g. avformat_find_stream_info() will see packets from
2095 * all active streams within the first few seconds). This is not very generic,
2096 * though, as the sequence numbers are technically independent.
2097 */
2098
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 12 if (!pls->finished && pls->cur_seq_no == highest_cur_seq_no - 1 &&
2099 ✗ highest_cur_seq_no < pls->start_seq_no + pls->n_segments) {
2100 ✗ pls->cur_seq_no = highest_cur_seq_no;
2101 }
2102
2103 12 pls->read_buffer = av_malloc(INITIAL_BUFFER_SIZE);
2104
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 12 if (!pls->read_buffer){
2105 ✗ avformat_free_context(pls->ctx);
2106 ✗ pls->ctx = NULL;
2107 ✗ return AVERROR(ENOMEM);
2108 }
2109
2110 12 ffio_init_context(&pls->pb, pls->read_buffer, INITIAL_BUFFER_SIZE, 0, pls,
2111 read_data, NULL, NULL);
2112
2113 /*
2114 * If encryption scheme is SAMPLE-AES, try to read ID3 tags of
2115 * external audio track that contains audio setup information
2116 */
2117 12 seg = current_segment(pls);
2118
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 12 if (seg && seg->key_type == KEY_SAMPLE_AES && pls->n_renditions > 0 &&
2119 ✗ pls->renditions[0]->type == AVMEDIA_TYPE_AUDIO) {
2120 uint8_t buf[HLS_MAX_ID3_TAGS_DATA_LEN];
2121 ✗ if ((ret = avio_read(&pls->pb.pub, buf, HLS_MAX_ID3_TAGS_DATA_LEN)) < 0) {
2122 /* Fail if error was not end of file */
2123 ✗ if (ret != AVERROR_EOF) {
2124 ✗ avformat_free_context(pls->ctx);
2125 ✗ pls->ctx = NULL;
2126 ✗ return ret;
2127 }
2128 }
2129 ✗ ret = 0;
2130 /* Reset reading */
2131 ✗ ff_format_io_close(pls->parent, &pls->input);
2132 ✗ pls->input = NULL;
2133 ✗ pls->input_read_done = 0;
2134 ✗ ff_format_io_close(pls->parent, &pls->input_next);
2135 ✗ pls->input_next = NULL;
2136 ✗ pls->input_next_requested = 0;
2137 ✗ pls->cur_seg_offset = 0;
2138 ✗ pls->cur_init_section = NULL;
2139 /* Reset EOF flag */
2140 ✗ pls->pb.pub.eof_reached = 0;
2141 /* Clear any buffered data */
2142 ✗ pls->pb.pub.buf_end = pls->pb.pub.buf_ptr = pls->pb.pub.buffer;
2143 /* Reset the position */
2144 ✗ pls->pb.pub.pos = 0;
2145 }
2146
2147 /*
2148 * If encryption scheme is SAMPLE-AES and audio setup information is present in external audio track,
2149 * use that information to find the media format, otherwise probe input data
2150 */
2151 12 seg = current_segment(pls);
2152
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 12 if (seg && seg->key_type == KEY_SAMPLE_AES && pls->is_id3_timestamped &&
2153 ✗ pls->audio_setup_info.codec_id != AV_CODEC_ID_NONE) {
2154 av_assert1(pls->audio_setup_info.codec_id == AV_CODEC_ID_AAC ||
2155 pls->audio_setup_info.codec_id == AV_CODEC_ID_AC3 ||
2156 pls->audio_setup_info.codec_id == AV_CODEC_ID_EAC3);
2157 // Keep this list in sync with ff_hls_senc_read_audio_setup_info()
2158 ✗ in_fmt = av_find_input_format(pls->audio_setup_info.codec_id == AV_CODEC_ID_AAC ? "aac" :
2159 ✗ pls->audio_setup_info.codec_id == AV_CODEC_ID_AC3 ? "ac3" : "eac3");
2160 } else {
2161
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 12 pls->ctx->probesize = s->probesize > 0 ? s->probesize : 1024 * 4;
2162
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 12 pls->ctx->max_analyze_duration = s->max_analyze_duration > 0 ? s->max_analyze_duration : 4 * AV_TIME_BASE;
2163 12 pls->ctx->interrupt_callback = s->interrupt_callback;
2164 12 url = av_strdup(pls->segments[0]->url);
2165 12 ret = av_probe_input_buffer(&pls->pb.pub, &in_fmt, url, NULL, 0, 0);
2166
2167
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 77 for (int n = 0; n < pls->n_segments; n++)
2168
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 65 if (ret >= 0)
2169 65 ret = test_segment(s, in_fmt, pls, pls->segments[n]);
2170
2171
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 12 if (ret < 0) {
2172 /* Free the ctx - it isn't initialized properly at this point,
2173 * so avformat_close_input shouldn't be called. If
2174 * avformat_open_input fails below, it frees and zeros the
2175 * context, so it doesn't need any special treatment like this. */
2176 ✗ av_log(s, AV_LOG_ERROR, "Error when loading first segment '%s'\n", url);
2177 ✗ avformat_free_context(pls->ctx);
2178 ✗ pls->ctx = NULL;
2179 ✗ av_free(url);
2180 ✗ return ret;
2181 }
2182 12 av_free(url);
2183 }
2184
2185 12 seg = current_segment(pls);
2186
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 12 if (seg && seg->key_type == KEY_SAMPLE_AES) {
2187 ✗ if (strstr(in_fmt->name, "mov")) {
2188 char key[33];
2189 ✗ ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
2190 ✗ av_dict_set(&options, "decryption_key", key, 0);
2191 ✗ } else if (!c->crypto_ctx.aes_ctx) {
2192 ✗ c->crypto_ctx.aes_ctx = av_aes_alloc();
2193 ✗ if (!c->crypto_ctx.aes_ctx) {
2194 ✗ avformat_free_context(pls->ctx);
2195 ✗ pls->ctx = NULL;
2196 ✗ return AVERROR(ENOMEM);
2197 }
2198 }
2199 }
2200
2201 12 pls->ctx->pb = &pls->pb.pub;
2202 12 pls->ctx->io_open = nested_io_open;
2203 12 pls->ctx->flags |= s->flags & ~AVFMT_FLAG_CUSTOM_IO;
2204
2205
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 12 if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
2206 ✗ return ret;
2207
2208 12 av_dict_copy(&options, c->seg_format_opts, 0);
2209
2210 12 ret = avformat_open_input(&pls->ctx, pls->segments[0]->url, in_fmt, &options);
2211 12 av_dict_free(&options);
2212
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 12 if (ret < 0)
2213 ✗ return ret;
2214
2215
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 12 if (pls->id3_deferred_extra && pls->ctx->nb_streams == 1) {
2216 ✗ ff_id3v2_parse_apic(pls->ctx, pls->id3_deferred_extra);
2217 ✗ avformat_queue_attached_pictures(pls->ctx);
2218 ✗ ff_id3v2_parse_priv(pls->ctx, pls->id3_deferred_extra);
2219 ✗ ff_id3v2_free_extra_meta(&pls->id3_deferred_extra);
2220 }
2221
2222
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 12 if (pls->is_id3_timestamped == -1)
2223 ✗ av_log(s, AV_LOG_WARNING, "No expected HTTP requests have been made\n");
2224
2225 /*
2226 * For ID3 timestamped raw audio streams we need to detect the packet
2227 * durations to calculate timestamps in fill_timing_for_id3_timestamped_stream(),
2228 * but for other streams we can rely on our user calling avformat_find_stream_info()
2229 * on us if they want to.
2230 */
2231
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 12 if (pls->is_id3_timestamped || (pls->n_renditions > 0 && pls->renditions[0]->type == AVMEDIA_TYPE_AUDIO)) {
2232 ✗ seg = current_segment(pls);
2233 ✗ if (seg && seg->key_type == KEY_SAMPLE_AES && pls->audio_setup_info.setup_data_length > 0 &&
2234 ✗ pls->ctx->nb_streams == 1)
2235 ✗ ret = ff_hls_senc_parse_audio_setup_info(pls->ctx->streams[0], &pls->audio_setup_info);
2236 else
2237 ✗ ret = avformat_find_stream_info(pls->ctx, NULL);
2238
2239 ✗ if (ret < 0)
2240 ✗ return ret;
2241 }
2242
2243 12 pls->has_noheader_flag = !!(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER);
2244
2245 /* Create new AVStreams for each stream in this playlist */
2246 12 ret = update_streams_from_subdemuxer(s, pls);
2247
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 12 if (ret < 0)
2248 ✗ return ret;
2249
2250 /*
2251 * Copy any metadata from playlist to main streams, but do not set
2252 * event flags.
2253 */
2254
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 12 if (pls->n_main_streams)
2255 12 av_dict_copy(&pls->main_streams[0]->metadata, pls->ctx->metadata, 0);
2256
2257 12 add_metadata_from_renditions(s, pls, AVMEDIA_TYPE_AUDIO);
2258 12 add_metadata_from_renditions(s, pls, AVMEDIA_TYPE_VIDEO);
2259 12 add_metadata_from_renditions(s, pls, AVMEDIA_TYPE_SUBTITLE);
2260 }
2261
2262 12 update_noheader_flag(s);
2263
2264 12 return 0;
2265 }
2266
2267 6368 static int recheck_discard_flags(AVFormatContext *s, int first)
2268 {
2269 6368 HLSContext *c = s->priv_data;
2270 6368 int i, changed = 0;
2271 int cur_needed;
2272
2273 /* Check if any new streams are needed */
2274
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 12736 for (i = 0; i < c->n_playlists; i++) {
2275 6368 struct playlist *pls = c->playlists[i];
2276
2277 6368 cur_needed = playlist_needed(c->playlists[i]);
2278
2279
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 6368 if (pls->broken) {
2280 ✗ continue;
2281 }
2282
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 6368 if (cur_needed && !pls->needed) {
2283 ✗ pls->needed = 1;
2284 ✗ changed = 1;
2285 ✗ pls->cur_seq_no = select_cur_seq_no(c, pls);
2286 ✗ pls->pb.pub.eof_reached = 0;
2287 ✗ if (c->cur_timestamp != AV_NOPTS_VALUE) {
2288 /* catch up */
2289 ✗ pls->seek_timestamp = c->cur_timestamp;
2290 ✗ pls->seek_flags = AVSEEK_FLAG_ANY;
2291 ✗ pls->seek_stream_index = -1;
2292 }
2293 ✗ av_log(s, AV_LOG_INFO, "Now receiving playlist %d, segment %"PRId64"\n", i, pls->cur_seq_no);
2294
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 6368 } else if (first && !cur_needed && pls->needed) {
2295 ✗ ff_format_io_close(pls->parent, &pls->input);
2296 ✗ pls->input_read_done = 0;
2297 ✗ ff_format_io_close(pls->parent, &pls->input_next);
2298 ✗ pls->input_next_requested = 0;
2299 ✗ pls->needed = 0;
2300 ✗ changed = 1;
2301 ✗ av_log(s, AV_LOG_INFO, "No longer receiving playlist %d\n", i);
2302 }
2303 }
2304 6368 return changed;
2305 }
2306
2307 ✗ static void fill_timing_for_id3_timestamped_stream(struct playlist *pls)
2308 {
2309 ✗ if (pls->id3_offset >= 0) {
2310 ✗ pls->pkt->dts = pls->id3_mpegts_timestamp +
2311 ✗ av_rescale_q(pls->id3_offset,
2312 ✗ pls->ctx->streams[pls->pkt->stream_index]->time_base,
2313 ✗ MPEG_TIME_BASE_Q);
2314 ✗ if (pls->pkt->duration)
2315 ✗ pls->id3_offset += pls->pkt->duration;
2316 else
2317 ✗ pls->id3_offset = -1;
2318 } else {
2319 /* there have been packets with unknown duration
2320 * since the last id3 tag, should not normally happen */
2321 ✗ pls->pkt->dts = AV_NOPTS_VALUE;
2322 }
2323
2324 ✗ if (pls->pkt->duration)
2325 ✗ pls->pkt->duration = av_rescale_q(pls->pkt->duration,
2326 ✗ pls->ctx->streams[pls->pkt->stream_index]->time_base,
2327 ✗ MPEG_TIME_BASE_Q);
2328
2329 ✗ pls->pkt->pts = AV_NOPTS_VALUE;
2330 ✗ }
2331
2332 12 static AVRational get_timebase(struct playlist *pls)
2333 {
2334
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 12 if (pls->is_id3_timestamped)
2335 ✗ return MPEG_TIME_BASE_Q;
2336
2337 12 return pls->ctx->streams[pls->pkt->stream_index]->time_base;
2338 }
2339
2340 ✗ static int compare_ts_with_wrapdetect(int64_t ts_a, struct playlist *pls_a,
2341 int64_t ts_b, struct playlist *pls_b)
2342 {
2343 ✗ int64_t scaled_ts_a = av_rescale_q(ts_a, get_timebase(pls_a), MPEG_TIME_BASE_Q);
2344 ✗ int64_t scaled_ts_b = av_rescale_q(ts_b, get_timebase(pls_b), MPEG_TIME_BASE_Q);
2345
2346 ✗ return av_compare_mod(scaled_ts_a, scaled_ts_b, 1LL << 33);
2347 }
2348
2349 6368 static int hls_read_packet(AVFormatContext *s, AVPacket *pkt)
2350 {
2351 6368 HLSContext *c = s->priv_data;
2352 6368 int ret, i, minplaylist = -1;
2353
2354 6368 recheck_discard_flags(s, c->first_packet);
2355 6368 c->first_packet = 0;
2356
2357
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 12736 for (i = 0; i < c->n_playlists; i++) {
2358 6368 struct playlist *pls = c->playlists[i];
2359 /* Make sure we've got one buffered packet from each open playlist
2360 * stream */
2361
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 6368 if (pls->needed && !pls->pkt->data) {
2362 ✗ while (1) {
2363 int64_t ts_diff;
2364 AVRational tb;
2365 6368 struct segment *seg = NULL;
2366 6368 ret = av_read_frame(pls->ctx, pls->pkt);
2367
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 6368 if (ret < 0) {
2368
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 11 if (!avio_feof(&pls->pb.pub) && ret != AVERROR_EOF)
2369 ✗ return ret;
2370 6368 break;
2371 } else {
2372 /* stream_index check prevents matching picture attachments etc. */
2373
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 6357 if (pls->is_id3_timestamped && pls->pkt->stream_index == 0) {
2374 /* audio elementary streams are id3 timestamped */
2375 ✗ fill_timing_for_id3_timestamped_stream(pls);
2376 }
2377
2378
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 6357 if (c->first_timestamp == AV_NOPTS_VALUE &&
2379
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 12 pls->pkt->dts != AV_NOPTS_VALUE)
2380 12 c->first_timestamp = av_rescale_q(pls->pkt->dts,
2381 12 get_timebase(pls), AV_TIME_BASE_Q);
2382 }
2383
2384 6357 seg = current_segment(pls);
2385
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 6357 if (seg && seg->key_type == KEY_SAMPLE_AES && !strstr(pls->ctx->iformat->name, "mov")) {
2386 ✗ enum AVCodecID codec_id = pls->ctx->streams[pls->pkt->stream_index]->codecpar->codec_id;
2387 ✗ memcpy(c->crypto_ctx.iv, seg->iv, sizeof(seg->iv));
2388 ✗ memcpy(c->crypto_ctx.key, pls->key, sizeof(pls->key));
2389 ✗ ff_hls_senc_decrypt_frame(codec_id, &c->crypto_ctx, pls->pkt);
2390 }
2391
2392
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 6357 if (pls->seek_timestamp == AV_NOPTS_VALUE)
2393 6357 break;
2394
2395 ✗ if (pls->seek_stream_index < 0 ||
2396 ✗ pls->seek_stream_index == pls->pkt->stream_index) {
2397
2398 ✗ if (pls->pkt->dts == AV_NOPTS_VALUE) {
2399 ✗ pls->seek_timestamp = AV_NOPTS_VALUE;
2400 ✗ break;
2401 }
2402
2403 ✗ tb = get_timebase(pls);
2404 ✗ ts_diff = av_rescale_rnd(pls->pkt->dts, AV_TIME_BASE,
2405 ✗ tb.den, AV_ROUND_DOWN) -
2406 ✗ pls->seek_timestamp;
2407 ✗ if (ts_diff >= 0 && (pls->seek_flags & AVSEEK_FLAG_ANY ||
2408 ✗ pls->pkt->flags & AV_PKT_FLAG_KEY)) {
2409 ✗ pls->seek_timestamp = AV_NOPTS_VALUE;
2410 ✗ break;
2411 }
2412 }
2413 ✗ av_packet_unref(pls->pkt);
2414 }
2415 }
2416 /* Check if this stream has the packet with the lowest dts */
2417
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 6368 if (pls->pkt->data) {
2418 6357 struct playlist *minpls = minplaylist < 0 ?
2419
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 6357 NULL : c->playlists[minplaylist];
2420
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 6357 if (minplaylist < 0) {
2421 6357 minplaylist = i;
2422 } else {
2423 ✗ int64_t dts = pls->pkt->dts;
2424 ✗ int64_t mindts = minpls->pkt->dts;
2425
2426 ✗ if (dts == AV_NOPTS_VALUE ||
2427 ✗ (mindts != AV_NOPTS_VALUE && compare_ts_with_wrapdetect(dts, pls, mindts, minpls) < 0))
2428 ✗ minplaylist = i;
2429 }
2430 }
2431 }
2432
2433 /* If we got a packet, return it */
2434
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 6368 if (minplaylist >= 0) {
2435 6357 struct playlist *pls = c->playlists[minplaylist];
2436 AVStream *ist;
2437 AVStream *st;
2438
2439 6357 ret = update_streams_from_subdemuxer(s, pls);
2440
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 6357 if (ret < 0) {
2441 ✗ av_packet_unref(pls->pkt);
2442 ✗ return ret;
2443 }
2444
2445 // If sub-demuxer reports updated metadata, copy it to the first stream
2446 // and set its AVSTREAM_EVENT_FLAG_METADATA_UPDATED flag.
2447
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 6357 if (pls->ctx->event_flags & AVFMT_EVENT_FLAG_METADATA_UPDATED) {
2448 ✗ if (pls->n_main_streams) {
2449 ✗ st = pls->main_streams[0];
2450 ✗ av_dict_copy(&st->metadata, pls->ctx->metadata, 0);
2451 ✗ st->event_flags |= AVSTREAM_EVENT_FLAG_METADATA_UPDATED;
2452 }
2453 ✗ pls->ctx->event_flags &= ~AVFMT_EVENT_FLAG_METADATA_UPDATED;
2454 }
2455
2456 /* check if noheader flag has been cleared by the subdemuxer */
2457
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 6357 if (pls->has_noheader_flag && !(pls->ctx->ctx_flags & AVFMTCTX_NOHEADER)) {
2458 11 pls->has_noheader_flag = 0;
2459 11 update_noheader_flag(s);
2460 }
2461
2462
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 6357 if (pls->pkt->stream_index >= pls->n_main_streams) {
2463 ✗ av_log(s, AV_LOG_ERROR, "stream index inconsistency: index %d, %d main streams, %d subdemuxer streams\n",
2464 ✗ pls->pkt->stream_index, pls->n_main_streams, pls->ctx->nb_streams);
2465 ✗ av_packet_unref(pls->pkt);
2466 ✗ return AVERROR_BUG;
2467 }
2468
2469 6357 ist = pls->ctx->streams[pls->pkt->stream_index];
2470 6357 st = pls->main_streams[pls->pkt->stream_index];
2471
2472 6357 av_packet_move_ref(pkt, pls->pkt);
2473 6357 pkt->stream_index = st->index;
2474
2475
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 6357 if (pkt->dts != AV_NOPTS_VALUE)
2476 6357 c->cur_timestamp = av_rescale_q(pkt->dts,
2477 ist->time_base,
2478 6357 AV_TIME_BASE_Q);
2479
2480 /* There may be more situations where this would be useful, but this at least
2481 * handles newly probed codecs properly (i.e. request_probe by mpegts). */
2482
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 6357 if (ist->codecpar->codec_id != st->codecpar->codec_id) {
2483 10 ret = set_stream_info_from_input_stream(st, pls, ist);
2484
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 10 if (ret < 0) {
2485 ✗ return ret;
2486 }
2487 }
2488
2489 6357 return 0;
2490 }
2491 11 return AVERROR_EOF;
2492 }
2493
2494 ✗ static int hls_read_seek(AVFormatContext *s, int stream_index,
2495 int64_t timestamp, int flags)
2496 {
2497 ✗ HLSContext *c = s->priv_data;
2498 ✗ struct playlist *seek_pls = NULL;
2499 int i, j;
2500 int stream_subdemuxer_index;
2501 int64_t first_timestamp, seek_timestamp, duration;
2502 int64_t seq_no, seg_start_ts;
2503
2504 ✗ if ((flags & AVSEEK_FLAG_BYTE) || (c->ctx->ctx_flags & AVFMTCTX_UNSEEKABLE))
2505 ✗ return AVERROR(ENOSYS);
2506
2507 ✗ first_timestamp = c->first_timestamp == AV_NOPTS_VALUE ?
2508 ✗ 0 : c->first_timestamp;
2509
2510 ✗ seek_timestamp = av_rescale_rnd(timestamp, AV_TIME_BASE,
2511 ✗ s->streams[stream_index]->time_base.den,
2512 AV_ROUND_DOWN);
2513
2514 ✗ duration = s->duration == AV_NOPTS_VALUE ?
2515 ✗ 0 : s->duration;
2516
2517 ✗ if (0 < duration && duration < seek_timestamp - first_timestamp)
2518 ✗ return AVERROR(EIO);
2519
2520 /* find the playlist with the specified stream */
2521 ✗ for (i = 0; i < c->n_playlists; i++) {
2522 ✗ struct playlist *pls = c->playlists[i];
2523 ✗ for (j = 0; j < pls->n_main_streams; j++) {
2524 ✗ if (pls->main_streams[j] == s->streams[stream_index]) {
2525 ✗ seek_pls = pls;
2526 ✗ stream_subdemuxer_index = j;
2527 ✗ break;
2528 }
2529 }
2530 }
2531 /* check if the timestamp is valid for the playlist with the
2532 * specified stream index */
2533 ✗ if (!seek_pls || !find_timestamp_in_playlist(c, seek_pls, seek_timestamp, &seq_no, &seg_start_ts))
2534 ✗ return AVERROR(EIO);
2535
2536 ✗ if (s->streams[stream_index]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
2537 ✗ flags & AVSEEK_FLAG_BACKWARD && !(flags & AVSEEK_FLAG_ANY)) {
2538 /* Seeking to start of segment ensures we seek to a keyframe located
2539 * before the given timestamp. */
2540 ✗ seek_timestamp = seg_start_ts;
2541 }
2542
2543 /* set segment now so we do not need to search again below */
2544 ✗ seek_pls->cur_seq_no = seq_no;
2545 ✗ seek_pls->seek_stream_index = stream_subdemuxer_index;
2546
2547 ✗ for (i = 0; i < c->n_playlists; i++) {
2548 /* Reset reading */
2549 ✗ struct playlist *pls = c->playlists[i];
2550 ✗ AVIOContext *const pb = &pls->pb.pub;
2551 ✗ ff_format_io_close(pls->parent, &pls->input);
2552 ✗ pls->input_read_done = 0;
2553 ✗ ff_format_io_close(pls->parent, &pls->input_next);
2554 ✗ pls->input_next_requested = 0;
2555 ✗ av_packet_unref(pls->pkt);
2556 ✗ pb->eof_reached = 0;
2557 /* Clear any buffered data */
2558 ✗ pb->buf_end = pb->buf_ptr = pb->buffer;
2559 /* Reset the pos, to let the mpegts/mov demuxer know we've seeked. */
2560 ✗ pb->pos = 0;
2561 /* Flush the packet queue of the subdemuxer. */
2562 ✗ ff_read_frame_flush(pls->ctx);
2563
2564 /* Reset the init segment so it's re-fetched and served appropiately */
2565 ✗ pls->cur_init_section = NULL;
2566
2567 ✗ pls->seek_timestamp = seek_timestamp;
2568 ✗ pls->seek_flags = flags;
2569
2570 ✗ if (pls != seek_pls) {
2571 /* set closest segment seq_no for playlists not handled above */
2572 ✗ find_timestamp_in_playlist(c, pls, seek_timestamp, &pls->cur_seq_no, NULL);
2573 /* seek the playlist to the given position without taking
2574 * keyframes into account since this playlist does not have the
2575 * specified stream where we should look for the keyframes */
2576 ✗ pls->seek_stream_index = -1;
2577 ✗ pls->seek_flags |= AVSEEK_FLAG_ANY;
2578 }
2579 }
2580
2581 ✗ c->cur_timestamp = seek_timestamp;
2582
2583 ✗ return 0;
2584 }
2585
2586 7204 static int hls_probe(const AVProbeData *p)
2587 {
2588 /* Require #EXTM3U at the start, and either one of the ones below
2589 * somewhere for a proper match. */
2590
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 7204 if (strncmp(p->buf, "#EXTM3U", 7))
2591 7192 return 0;
2592
2593
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 12 if (strstr(p->buf, "#EXT-X-STREAM-INF:") ||
2594
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 12 strstr(p->buf, "#EXT-X-TARGETDURATION:") ||
2595 ✗ strstr(p->buf, "#EXT-X-MEDIA-SEQUENCE:")) {
2596
2597
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 12 int mime_ok = p->mime_type && !(
2598 ✗ av_strcasecmp(p->mime_type, "application/vnd.apple.mpegurl") &&
2599 ✗ av_strcasecmp(p->mime_type, "audio/mpegurl")
2600 );
2601
2602
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 12 int mime_x = p->mime_type && !(
2603 ✗ av_strcasecmp(p->mime_type, "audio/x-mpegurl") &&
2604 ✗ av_strcasecmp(p->mime_type, "application/x-mpegurl")
2605 );
2606
2607
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2608
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 12 !mime_x &&
2609
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 12 !av_match_ext (p->filename, "m3u8,m3u") &&
2610 ✗ ff_match_url_ext(p->filename, "m3u8,m3u") <= 0) {
2611 ✗ av_log(NULL, AV_LOG_ERROR, "Not detecting m3u8/hls with non standard extension and non standard mime type\n");
2612 ✗ return 0;
2613 }
2614
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 12 if (mime_x)
2615 ✗ av_log(NULL, AV_LOG_WARNING, "mime type is not rfc8216 compliant\n");
2616
2617 12 return AVPROBE_SCORE_MAX;
2618 }
2619 ✗ return 0;
2620 }
2621
2622 #define OFFSET(x) offsetof(HLSContext, x)
2623 #define FLAGS AV_OPT_FLAG_DECODING_PARAM
2624 static const AVOption hls_options[] = {
2625 {"live_start_index", "segment index to start live streams at (negative values are from the end)",
2626 OFFSET(live_start_index), AV_OPT_TYPE_INT, {.i64 = -3}, INT_MIN, INT_MAX, FLAGS},
2627 {"prefer_x_start", "prefer to use #EXT-X-START if it's in playlist instead of live_start_index",
2628 OFFSET(prefer_x_start), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS},
2629 {"allowed_extensions", "List of file extensions that hls is allowed to access",
2630 OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
2631 {.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"},
2632 INT_MIN, INT_MAX, FLAGS},
2633 {"extension_picky", "Be picky with all extensions matching",
2634 OFFSET(extension_picky), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS},
2635 {"max_reload", "Maximum number of times a insufficient list is attempted to be reloaded",
2636 OFFSET(max_reload), AV_OPT_TYPE_INT, {.i64 = 100}, 0, INT_MAX, FLAGS},
2637 {"m3u8_hold_counters", "The maximum number of times to load m3u8 when it refreshes without new segments",
2638 OFFSET(m3u8_hold_counters), AV_OPT_TYPE_INT, {.i64 = 1000}, 0, INT_MAX, FLAGS},
2639 {"http_persistent", "Use persistent HTTP connections",
2640 OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
2641 {"http_multiple", "Use multiple HTTP connections for fetching segments",
2642 OFFSET(http_multiple), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, FLAGS},
2643 {"http_seekable", "Use HTTP partial requests, 0 = disable, 1 = enable, -1 = auto",
2644 OFFSET(http_seekable), AV_OPT_TYPE_BOOL, { .i64 = -1}, -1, 1, FLAGS},
2645 {"seg_format_options", "Set options for segment demuxer",
2646 OFFSET(seg_format_opts), AV_OPT_TYPE_DICT, {.str = NULL}, 0, 0, FLAGS},
2647 {"seg_max_retry", "Maximum number of times to reload a segment on error.",
2648 OFFSET(seg_max_retry), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS},
2649 {NULL}
2650 };
2651
2652 static const AVClass hls_class = {
2653 .class_name = "hls demuxer",
2654 .item_name = av_default_item_name,
2655 .option = hls_options,
2656 .version = LIBAVUTIL_VERSION_INT,
2657 };
2658
2659 const FFInputFormat ff_hls_demuxer = {
2660 .p.name = "hls",
2661 .p.long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
2662 .p.priv_class = &hls_class,
2663 .p.flags = AVFMT_NOGENSEARCH | AVFMT_TS_DISCONT | AVFMT_NO_BYTE_SEEK,
2664 .priv_data_size = sizeof(HLSContext),
2665 .flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
2666 .read_probe = hls_probe,
2667 .read_header = hls_read_header,
2668 .read_packet = hls_read_packet,
2669 .read_close = hls_close,
2670 .read_seek = hls_read_seek,
2671 };
2672