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1/*
2 * Apple HTTP Live Streaming segmenter
3 * Copyright (c) 2012, Luca Barbato
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#include "config.h"
23#include <float.h>
24#include <stdint.h>
25#if HAVE_UNISTD_H
26#include <unistd.h>
27#endif
28
29#include "libavutil/avassert.h"
30#include "libavutil/mathematics.h"
31#include "libavutil/parseutils.h"
32#include "libavutil/avstring.h"
33#include "libavutil/opt.h"
34#include "libavutil/log.h"
35#include "libavutil/time_internal.h"
36
37#include "avformat.h"
38#include "avio_internal.h"
39#include "internal.h"
40#include "os_support.h"
41
42typedef enum {
43 HLS_START_SEQUENCE_AS_START_NUMBER = 0,
44 HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH = 1,
45 HLS_START_SEQUENCE_AS_FORMATTED_DATETIME = 2, // YYYYMMDDhhmmss
46} StartSequenceSourceType;
47
48#define KEYSIZE 16
49#define LINE_BUFFER_SIZE 1024
50#define HLS_MICROSECOND_UNIT 1000000
51
52typedef struct HLSSegment {
53 char filename[1024];
54 char sub_filename[1024];
55 double duration; /* in seconds */
56 int discont;
57 int64_t pos;
58 int64_t size;
59
60 char key_uri[LINE_BUFFER_SIZE + 1];
61 char iv_string[KEYSIZE*2 + 1];
62
63 struct HLSSegment *next;
64} HLSSegment;
65
66typedef enum HLSFlags {
67 // Generate a single media file and use byte ranges in the playlist.
68 HLS_SINGLE_FILE = (1 << 0),
69 HLS_DELETE_SEGMENTS = (1 << 1),
70 HLS_ROUND_DURATIONS = (1 << 2),
71 HLS_DISCONT_START = (1 << 3),
72 HLS_OMIT_ENDLIST = (1 << 4),
73 HLS_SPLIT_BY_TIME = (1 << 5),
74 HLS_APPEND_LIST = (1 << 6),
75 HLS_PROGRAM_DATE_TIME = (1 << 7),
76 HLS_SECOND_LEVEL_SEGMENT_INDEX = (1 << 8), // include segment index in segment filenames when use_localtime e.g.: %%03d
77 HLS_SECOND_LEVEL_SEGMENT_DURATION = (1 << 9), // include segment duration (microsec) in segment filenames when use_localtime e.g.: %%09t
78 HLS_SECOND_LEVEL_SEGMENT_SIZE = (1 << 10), // include segment size (bytes) in segment filenames when use_localtime e.g.: %%014s
79 HLS_TEMP_FILE = (1 << 11),
80} HLSFlags;
81
82typedef enum {
83 PLAYLIST_TYPE_NONE,
84 PLAYLIST_TYPE_EVENT,
85 PLAYLIST_TYPE_VOD,
86 PLAYLIST_TYPE_NB,
87} PlaylistType;
88
89typedef struct HLSContext {
90 const AVClass *class; // Class for private options.
91 unsigned number;
92 int64_t sequence;
93 int64_t start_sequence;
94 uint32_t start_sequence_source_type; // enum StartSequenceSourceType
95 AVOutputFormat *oformat;
96 AVOutputFormat *vtt_oformat;
97
98 AVFormatContext *avf;
99 AVFormatContext *vtt_avf;
100
101 float time; // Set by a private option.
102 float init_time; // Set by a private option.
103 int max_nb_segments; // Set by a private option.
104#if FF_API_HLS_WRAP
105 int wrap; // Set by a private option.
106#endif
107 uint32_t flags; // enum HLSFlags
108 uint32_t pl_type; // enum PlaylistType
109 char *segment_filename;
110
111 int use_localtime; ///< flag to expand filename with localtime
112 int use_localtime_mkdir;///< flag to mkdir dirname in timebased filename
113 int allowcache;
114 int64_t recording_time;
115 int has_video;
116 int has_subtitle;
117 int new_start;
118 double dpp; // duration per packet
119 int64_t start_pts;
120 int64_t end_pts;
121 double duration; // last segment duration computed so far, in seconds
122 int64_t start_pos; // last segment starting position
123 int64_t size; // last segment size
124 int64_t max_seg_size; // every segment file max size
125 int nb_entries;
126 int discontinuity_set;
127 int discontinuity;
128
129 HLSSegment *segments;
130 HLSSegment *last_segment;
131 HLSSegment *old_segments;
132
133 char *basename;
134 char *vtt_basename;
135 char *vtt_m3u8_name;
136 char *baseurl;
137 char *format_options_str;
138 char *vtt_format_options_str;
139 char *subtitle_filename;
140 AVDictionary *format_options;
141
142 char *key_info_file;
143 char key_file[LINE_BUFFER_SIZE + 1];
144 char key_uri[LINE_BUFFER_SIZE + 1];
145 char key_string[KEYSIZE*2 + 1];
146 char iv_string[KEYSIZE*2 + 1];
147 AVDictionary *vtt_format_options;
148
149 char *method;
150
151 double initial_prog_date_time;
152 char current_segment_final_filename_fmt[1024]; // when renaming segments
153} HLSContext;
154
155static int get_int_from_double(double val)
156{
157 return (int)((val - (int)val) >= 0.001) ? (int)(val + 1) : (int)val;
158}
159
160static int mkdir_p(const char *path) {
161 int ret = 0;
162 char *temp = av_strdup(path);
163 char *pos = temp;
164 char tmp_ch = '\0';
165
166 if (!path || !temp) {
167 return -1;
168 }
169
170 if (!strncmp(temp, "/", 1) || !strncmp(temp, "\\", 1)) {
171 pos++;
172 } else if (!strncmp(temp, "./", 2) || !strncmp(temp, ".\\", 2)) {
173 pos += 2;
174 }
175
176 for ( ; *pos != '\0'; ++pos) {
177 if (*pos == '/' || *pos == '\\') {
178 tmp_ch = *pos;
179 *pos = '\0';
180 ret = mkdir(temp, 0755);
181 *pos = tmp_ch;
182 }
183 }
184
185 if ((*(pos - 1) != '/') || (*(pos - 1) != '\\')) {
186 ret = mkdir(temp, 0755);
187 }
188
189 av_free(temp);
190 return ret;
191}
192
193static int replace_int_data_in_filename(char *buf, int buf_size, const char *filename, char placeholder, int64_t number)
194{
195 const char *p;
196 char *q, buf1[20], c;
197 int nd, len, addchar_count;
198 int found_count = 0;
199
200 q = buf;
201 p = filename;
202 for (;;) {
203 c = *p;
204 if (c == '\0')
205 break;
206 if (c == '%' && *(p+1) == '%') // %%
207 addchar_count = 2;
208 else if (c == '%' && (av_isdigit(*(p+1)) || *(p+1) == placeholder)) {
209 nd = 0;
210 addchar_count = 1;
211 while (av_isdigit(*(p + addchar_count))) {
212 nd = nd * 10 + *(p + addchar_count) - '0';
213 addchar_count++;
214 }
215
216 if (*(p + addchar_count) == placeholder) {
217 len = snprintf(buf1, sizeof(buf1), "%0*"PRId64, (number < 0) ? nd : nd++, number);
218 if (len < 1) // returned error or empty buf1
219 goto fail;
220 if ((q - buf + len) > buf_size - 1)
221 goto fail;
222 memcpy(q, buf1, len);
223 q += len;
224 p += (addchar_count + 1);
225 addchar_count = 0;
226 found_count++;
227 }
228
229 } else
230 addchar_count = 1;
231
232 while (addchar_count--)
233 if ((q - buf) < buf_size - 1)
234 *q++ = *p++;
235 else
236 goto fail;
237 }
238 *q = '\0';
239 return found_count;
240fail:
241 *q = '\0';
242 return -1;
243}
244
245static int hls_delete_old_segments(AVFormatContext *s, HLSContext *hls) {
246
247 HLSSegment *segment, *previous_segment = NULL;
248 float playlist_duration = 0.0f;
249 int ret = 0, path_size, sub_path_size;
250 char *dirname = NULL, *p, *sub_path;
251 char *path = NULL;
252 AVDictionary *options = NULL;
253 AVIOContext *out = NULL;
254 const char *proto = NULL;
255
256 segment = hls->segments;
257 while (segment) {
258 playlist_duration += segment->duration;
259 segment = segment->next;
260 }
261
262 segment = hls->old_segments;
263 while (segment) {
264 playlist_duration -= segment->duration;
265 previous_segment = segment;
266 segment = previous_segment->next;
267 if (playlist_duration <= -previous_segment->duration) {
268 previous_segment->next = NULL;
269 break;
270 }
271 }
272
273 if (segment && !hls->use_localtime_mkdir) {
274 if (hls->segment_filename) {
275 dirname = av_strdup(hls->segment_filename);
276 } else {
277 dirname = av_strdup(hls->avf->filename);
278 }
279 if (!dirname) {
280 ret = AVERROR(ENOMEM);
281 goto fail;
282 }
283 p = (char *)av_basename(dirname);
284 *p = '\0';
285 }
286
287 while (segment) {
288 av_log(hls, AV_LOG_DEBUG, "deleting old segment %s\n",
289 segment->filename);
290 path_size = (hls->use_localtime_mkdir ? 0 : strlen(dirname)) + strlen(segment->filename) + 1;
291 path = av_malloc(path_size);
292 if (!path) {
293 ret = AVERROR(ENOMEM);
294 goto fail;
295 }
296
297 if (hls->use_localtime_mkdir)
298 av_strlcpy(path, segment->filename, path_size);
299 else { // segment->filename contains basename only
300 av_strlcpy(path, dirname, path_size);
301 av_strlcat(path, segment->filename, path_size);
302 }
303
304 proto = avio_find_protocol_name(s->filename);
305 if (hls->method || (proto && !av_strcasecmp(proto, "http"))) {
306 av_dict_set(&options, "method", "DELETE", 0);
307 if ((ret = hls->avf->io_open(hls->avf, &out, path, AVIO_FLAG_WRITE, &options)) < 0)
308 goto fail;
309 ff_format_io_close(hls->avf, &out);
310 } else if (unlink(path) < 0) {
311 av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
312 path, strerror(errno));
313 }
314
315 if ((segment->sub_filename[0] != '\0')) {
316 sub_path_size = strlen(segment->sub_filename) + 1 + (dirname ? strlen(dirname) : 0);
317 sub_path = av_malloc(sub_path_size);
318 if (!sub_path) {
319 ret = AVERROR(ENOMEM);
320 goto fail;
321 }
322
323 av_strlcpy(sub_path, dirname, sub_path_size);
324 av_strlcat(sub_path, segment->sub_filename, sub_path_size);
325
326 if (hls->method || (proto && !av_strcasecmp(proto, "http"))) {
327 av_dict_set(&options, "method", "DELETE", 0);
328 if ((ret = hls->avf->io_open(hls->avf, &out, sub_path, AVIO_FLAG_WRITE, &options)) < 0) {
329 av_free(sub_path);
330 goto fail;
331 }
332 ff_format_io_close(hls->avf, &out);
333 } else if (unlink(sub_path) < 0) {
334 av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
335 sub_path, strerror(errno));
336 }
337 av_free(sub_path);
338 }
339 av_freep(&path);
340 previous_segment = segment;
341 segment = previous_segment->next;
342 av_free(previous_segment);
343 }
344
345fail:
346 av_free(path);
347 av_free(dirname);
348
349 return ret;
350}
351
352static int hls_encryption_start(AVFormatContext *s)
353{
354 HLSContext *hls = s->priv_data;
355 int ret;
356 AVIOContext *pb;
357 uint8_t key[KEYSIZE];
358
359 if ((ret = s->io_open(s, &pb, hls->key_info_file, AVIO_FLAG_READ, NULL)) < 0) {
360 av_log(hls, AV_LOG_ERROR,
361 "error opening key info file %s\n", hls->key_info_file);
362 return ret;
363 }
364
365 ff_get_line(pb, hls->key_uri, sizeof(hls->key_uri));
366 hls->key_uri[strcspn(hls->key_uri, "\r\n")] = '\0';
367
368 ff_get_line(pb, hls->key_file, sizeof(hls->key_file));
369 hls->key_file[strcspn(hls->key_file, "\r\n")] = '\0';
370
371 ff_get_line(pb, hls->iv_string, sizeof(hls->iv_string));
372 hls->iv_string[strcspn(hls->iv_string, "\r\n")] = '\0';
373
374 ff_format_io_close(s, &pb);
375
376 if (!*hls->key_uri) {
377 av_log(hls, AV_LOG_ERROR, "no key URI specified in key info file\n");
378 return AVERROR(EINVAL);
379 }
380
381 if (!*hls->key_file) {
382 av_log(hls, AV_LOG_ERROR, "no key file specified in key info file\n");
383 return AVERROR(EINVAL);
384 }
385
386 if ((ret = s->io_open(s, &pb, hls->key_file, AVIO_FLAG_READ, NULL)) < 0) {
387 av_log(hls, AV_LOG_ERROR, "error opening key file %s\n", hls->key_file);
388 return ret;
389 }
390
391 ret = avio_read(pb, key, sizeof(key));
392 ff_format_io_close(s, &pb);
393 if (ret != sizeof(key)) {
394 av_log(hls, AV_LOG_ERROR, "error reading key file %s\n", hls->key_file);
395 if (ret >= 0 || ret == AVERROR_EOF)
396 ret = AVERROR(EINVAL);
397 return ret;
398 }
399 ff_data_to_hex(hls->key_string, key, sizeof(key), 0);
400
401 return 0;
402}
403
404static int read_chomp_line(AVIOContext *s, char *buf, int maxlen)
405{
406 int len = ff_get_line(s, buf, maxlen);
407 while (len > 0 && av_isspace(buf[len - 1]))
408 buf[--len] = '\0';
409 return len;
410}
411
412static int hls_mux_init(AVFormatContext *s)
413{
414 HLSContext *hls = s->priv_data;
415 AVFormatContext *oc;
416 AVFormatContext *vtt_oc = NULL;
417 int i, ret;
418
419 ret = avformat_alloc_output_context2(&hls->avf, hls->oformat, NULL, NULL);
420 if (ret < 0)
421 return ret;
422 oc = hls->avf;
423
424 oc->filename[0] = '\0';
425 oc->oformat = hls->oformat;
426 oc->interrupt_callback = s->interrupt_callback;
427 oc->max_delay = s->max_delay;
428 oc->opaque = s->opaque;
429 oc->io_open = s->io_open;
430 oc->io_close = s->io_close;
431 av_dict_copy(&oc->metadata, s->metadata, 0);
432
433 if(hls->vtt_oformat) {
434 ret = avformat_alloc_output_context2(&hls->vtt_avf, hls->vtt_oformat, NULL, NULL);
435 if (ret < 0)
436 return ret;
437 vtt_oc = hls->vtt_avf;
438 vtt_oc->oformat = hls->vtt_oformat;
439 av_dict_copy(&vtt_oc->metadata, s->metadata, 0);
440 }
441
442 for (i = 0; i < s->nb_streams; i++) {
443 AVStream *st;
444 AVFormatContext *loc;
445 if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
446 loc = vtt_oc;
447 else
448 loc = oc;
449
450 if (!(st = avformat_new_stream(loc, NULL)))
451 return AVERROR(ENOMEM);
452 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
453 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
454 st->time_base = s->streams[i]->time_base;
455 av_dict_copy(&st->metadata, s->streams[i]->metadata, 0);
456 }
457 hls->start_pos = 0;
458 hls->new_start = 1;
459
460 return 0;
461}
462
463static HLSSegment *find_segment_by_filename(HLSSegment *segment, const char *filename)
464{
465 while (segment) {
466 if (!av_strcasecmp(segment->filename,filename))
467 return segment;
468 segment = segment->next;
469 }
470 return (HLSSegment *) NULL;
471}
472
473static int sls_flags_filename_process(struct AVFormatContext *s, HLSContext *hls, HLSSegment *en, double duration,
474 int64_t pos, int64_t size)
475{
476 if ((hls->flags & (HLS_SECOND_LEVEL_SEGMENT_SIZE | HLS_SECOND_LEVEL_SEGMENT_DURATION)) &&
477 strlen(hls->current_segment_final_filename_fmt)) {
478 av_strlcpy(hls->avf->filename, hls->current_segment_final_filename_fmt, sizeof(hls->avf->filename));
479 if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) {
480 char * filename = av_strdup(hls->avf->filename); // %%s will be %s after strftime
481 if (!filename) {
482 av_free(en);
483 return AVERROR(ENOMEM);
484 }
485 if (replace_int_data_in_filename(hls->avf->filename, sizeof(hls->avf->filename),
486 filename, 's', pos + size) < 1) {
487 av_log(hls, AV_LOG_ERROR,
488 "Invalid second level segment filename template '%s', "
489 "you can try to remove second_level_segment_size flag\n",
490 filename);
491 av_free(filename);
492 av_free(en);
493 return AVERROR(EINVAL);
494 }
495 av_free(filename);
496 }
497 if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) {
498 char * filename = av_strdup(hls->avf->filename); // %%t will be %t after strftime
499 if (!filename) {
500 av_free(en);
501 return AVERROR(ENOMEM);
502 }
503 if (replace_int_data_in_filename(hls->avf->filename, sizeof(hls->avf->filename),
504 filename, 't', (int64_t)round(duration * HLS_MICROSECOND_UNIT)) < 1) {
505 av_log(hls, AV_LOG_ERROR,
506 "Invalid second level segment filename template '%s', "
507 "you can try to remove second_level_segment_time flag\n",
508 filename);
509 av_free(filename);
510 av_free(en);
511 return AVERROR(EINVAL);
512 }
513 av_free(filename);
514 }
515 }
516 return 0;
517}
518
519static int sls_flag_check_duration_size_index(HLSContext *hls)
520{
521 int ret = 0;
522
523 if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) {
524 av_log(hls, AV_LOG_ERROR,
525 "second_level_segment_duration hls_flag requires use_localtime to be true\n");
526 ret = AVERROR(EINVAL);
527 }
528 if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) {
529 av_log(hls, AV_LOG_ERROR,
530 "second_level_segment_size hls_flag requires use_localtime to be true\n");
531 ret = AVERROR(EINVAL);
532 }
533 if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_INDEX) {
534 av_log(hls, AV_LOG_ERROR,
535 "second_level_segment_index hls_flag requires use_localtime to be true\n");
536 ret = AVERROR(EINVAL);
537 }
538
539 return ret;
540}
541
542static int sls_flag_check_duration_size(HLSContext *hls)
543{
544 const char *proto = avio_find_protocol_name(hls->basename);
545 int segment_renaming_ok = proto && !strcmp(proto, "file");
546 int ret = 0;
547
548 if ((hls->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) && !segment_renaming_ok) {
549 av_log(hls, AV_LOG_ERROR,
550 "second_level_segment_duration hls_flag works only with file protocol segment names\n");
551 ret = AVERROR(EINVAL);
552 }
553 if ((hls->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) && !segment_renaming_ok) {
554 av_log(hls, AV_LOG_ERROR,
555 "second_level_segment_size hls_flag works only with file protocol segment names\n");
556 ret = AVERROR(EINVAL);
557 }
558
559 return ret;
560}
561
562static void sls_flag_file_rename(HLSContext *hls, char *old_filename) {
563 if ((hls->flags & (HLS_SECOND_LEVEL_SEGMENT_SIZE | HLS_SECOND_LEVEL_SEGMENT_DURATION)) &&
564 strlen(hls->current_segment_final_filename_fmt)) {
565 ff_rename(old_filename, hls->avf->filename, hls);
566 }
567}
568
569static int sls_flag_use_localtime_filename(AVFormatContext *oc, HLSContext *c)
570{
571 if (c->flags & HLS_SECOND_LEVEL_SEGMENT_INDEX) {
572 char * filename = av_strdup(oc->filename); // %%d will be %d after strftime
573 if (!filename)
574 return AVERROR(ENOMEM);
575 if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename),
576#if FF_API_HLS_WRAP
577 filename, 'd', c->wrap ? c->sequence % c->wrap : c->sequence) < 1) {
578#else
579 filename, 'd', c->sequence) < 1) {
580#endif
581 av_log(c, AV_LOG_ERROR, "Invalid second level segment filename template '%s', "
582 "you can try to remove second_level_segment_index flag\n",
583 filename);
584 av_free(filename);
585 return AVERROR(EINVAL);
586 }
587 av_free(filename);
588 }
589 if (c->flags & (HLS_SECOND_LEVEL_SEGMENT_SIZE | HLS_SECOND_LEVEL_SEGMENT_DURATION)) {
590 av_strlcpy(c->current_segment_final_filename_fmt, oc->filename,
591 sizeof(c->current_segment_final_filename_fmt));
592 if (c->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) {
593 char * filename = av_strdup(oc->filename); // %%s will be %s after strftime
594 if (!filename)
595 return AVERROR(ENOMEM);
596 if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename), filename, 's', 0) < 1) {
597 av_log(c, AV_LOG_ERROR, "Invalid second level segment filename template '%s', "
598 "you can try to remove second_level_segment_size flag\n",
599 filename);
600 av_free(filename);
601 return AVERROR(EINVAL);
602 }
603 av_free(filename);
604 }
605 if (c->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) {
606 char * filename = av_strdup(oc->filename); // %%t will be %t after strftime
607 if (!filename)
608 return AVERROR(ENOMEM);
609 if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename), filename, 't', 0) < 1) {
610 av_log(c, AV_LOG_ERROR, "Invalid second level segment filename template '%s', "
611 "you can try to remove second_level_segment_time flag\n",
612 filename);
613 av_free(filename);
614 return AVERROR(EINVAL);
615 }
616 av_free(filename);
617 }
618 }
619 return 0;
620}
621
622/* Create a new segment and append it to the segment list */
623static int hls_append_segment(struct AVFormatContext *s, HLSContext *hls, double duration,
624 int64_t pos, int64_t size)
625{
626 HLSSegment *en = av_malloc(sizeof(*en));
627 const char *filename;
628 int ret;
629
630 if (!en)
631 return AVERROR(ENOMEM);
632
633 ret = sls_flags_filename_process(s, hls, en, duration, pos, size);
634 if (ret < 0) {
635 return ret;
636 }
637
638 filename = av_basename(hls->avf->filename);
639
640 if (hls->use_localtime_mkdir) {
641 filename = hls->avf->filename;
642 }
643 if (find_segment_by_filename(hls->segments, filename)
644 || find_segment_by_filename(hls->old_segments, filename)) {
645 av_log(hls, AV_LOG_WARNING, "Duplicated segment filename detected: %s\n", filename);
646 }
647 av_strlcpy(en->filename, filename, sizeof(en->filename));
648
649 if(hls->has_subtitle)
650 av_strlcpy(en->sub_filename, av_basename(hls->vtt_avf->filename), sizeof(en->sub_filename));
651 else
652 en->sub_filename[0] = '\0';
653
654 en->duration = duration;
655 en->pos = pos;
656 en->size = size;
657 en->next = NULL;
658 en->discont = 0;
659
660 if (hls->discontinuity) {
661 en->discont = 1;
662 hls->discontinuity = 0;
663 }
664
665 if (hls->key_info_file) {
666 av_strlcpy(en->key_uri, hls->key_uri, sizeof(en->key_uri));
667 av_strlcpy(en->iv_string, hls->iv_string, sizeof(en->iv_string));
668 }
669
670 if (!hls->segments)
671 hls->segments = en;
672 else
673 hls->last_segment->next = en;
674
675 hls->last_segment = en;
676
677 // EVENT or VOD playlists imply sliding window cannot be used
678 if (hls->pl_type != PLAYLIST_TYPE_NONE)
679 hls->max_nb_segments = 0;
680
681 if (hls->max_nb_segments && hls->nb_entries >= hls->max_nb_segments) {
682 en = hls->segments;
683 hls->initial_prog_date_time += en->duration;
684 hls->segments = en->next;
685 if (en && hls->flags & HLS_DELETE_SEGMENTS &&
686#if FF_API_HLS_WRAP
687 !(hls->flags & HLS_SINGLE_FILE || hls->wrap)) {
688#else
689 !(hls->flags & HLS_SINGLE_FILE)) {
690#endif
691 en->next = hls->old_segments;
692 hls->old_segments = en;
693 if ((ret = hls_delete_old_segments(s, hls)) < 0)
694 return ret;
695 } else
696 av_free(en);
697 } else
698 hls->nb_entries++;
699
700 if (hls->max_seg_size > 0) {
701 return 0;
702 }
703 hls->sequence++;
704
705 return 0;
706}
707
708static int parse_playlist(AVFormatContext *s, const char *url)
709{
710 HLSContext *hls = s->priv_data;
711 AVIOContext *in;
712 int ret = 0, is_segment = 0;
713 int64_t new_start_pos;
714 char line[1024];
715 const char *ptr;
716
717 if ((ret = ffio_open_whitelist(&in, url, AVIO_FLAG_READ,
718 &s->interrupt_callback, NULL,
719 s->protocol_whitelist, s->protocol_blacklist)) < 0)
720 return ret;
721
722 read_chomp_line(in, line, sizeof(line));
723 if (strcmp(line, "#EXTM3U")) {
724 ret = AVERROR_INVALIDDATA;
725 goto fail;
726 }
727
728 hls->discontinuity = 0;
729 while (!avio_feof(in)) {
730 read_chomp_line(in, line, sizeof(line));
731 if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
732 int64_t tmp_sequence = strtoll(ptr, NULL, 10);
733 if (tmp_sequence < hls->sequence)
734 av_log(hls, AV_LOG_VERBOSE,
735 "Found playlist sequence number was smaller """
736 "than specified start sequence number: %"PRId64" < %"PRId64", "
737 "omitting\n", tmp_sequence, hls->start_sequence);
738 else {
739 av_log(hls, AV_LOG_DEBUG, "Found playlist sequence number: %"PRId64"\n", tmp_sequence);
740 hls->sequence = tmp_sequence;
741 }
742 } else if (av_strstart(line, "#EXT-X-DISCONTINUITY", &ptr)) {
743 is_segment = 1;
744 hls->discontinuity = 1;
745 } else if (av_strstart(line, "#EXTINF:", &ptr)) {
746 is_segment = 1;
747 hls->duration = atof(ptr);
748 } else if (av_strstart(line, "#", NULL)) {
749 continue;
750 } else if (line[0]) {
751 if (is_segment) {
752 is_segment = 0;
753 new_start_pos = avio_tell(hls->avf->pb);
754 hls->size = new_start_pos - hls->start_pos;
755 av_strlcpy(hls->avf->filename, line, sizeof(line));
756 ret = hls_append_segment(s, hls, hls->duration, hls->start_pos, hls->size);
757 if (ret < 0)
758 goto fail;
759 hls->start_pos = new_start_pos;
760 }
761 }
762 }
763
764fail:
765 avio_close(in);
766 return ret;
767}
768
769static void hls_free_segments(HLSSegment *p)
770{
771 HLSSegment *en;
772
773 while(p) {
774 en = p;
775 p = p->next;
776 av_free(en);
777 }
778}
779
780static void set_http_options(AVFormatContext *s, AVDictionary **options, HLSContext *c)
781{
782 const char *proto = avio_find_protocol_name(s->filename);
783 int http_base_proto = proto ? (!av_strcasecmp(proto, "http") || !av_strcasecmp(proto, "https")) : 0;
784
785 if (c->method) {
786 av_dict_set(options, "method", c->method, 0);
787 } else if (http_base_proto) {
788 av_log(c, AV_LOG_WARNING, "No HTTP method set, hls muxer defaulting to method PUT.\n");
789 av_dict_set(options, "method", "PUT", 0);
790 }
791}
792
793static void write_m3u8_head_block(HLSContext *hls, AVIOContext *out, int version,
794 int target_duration, int64_t sequence)
795{
796 avio_printf(out, "#EXTM3U\n");
797 avio_printf(out, "#EXT-X-VERSION:%d\n", version);
798 if (hls->allowcache == 0 || hls->allowcache == 1) {
799 avio_printf(out, "#EXT-X-ALLOW-CACHE:%s\n", hls->allowcache == 0 ? "NO" : "YES");
800 }
801 avio_printf(out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
802 avio_printf(out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
803 av_log(hls, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
804}
805
806static void hls_rename_temp_file(AVFormatContext *s, AVFormatContext *oc)
807{
808 size_t len = strlen(oc->filename);
809 char final_filename[sizeof(oc->filename)];
810
811 av_strlcpy(final_filename, oc->filename, len);
812 final_filename[len-4] = '\0';
813 ff_rename(oc->filename, final_filename, s);
814 oc->filename[len-4] = '\0';
815}
816
817static int hls_window(AVFormatContext *s, int last)
818{
819 HLSContext *hls = s->priv_data;
820 HLSSegment *en;
821 int target_duration = 0;
822 int ret = 0;
823 AVIOContext *out = NULL;
824 AVIOContext *sub_out = NULL;
825 char temp_filename[1024];
826 int64_t sequence = FFMAX(hls->start_sequence, hls->sequence - hls->nb_entries);
827 int version = 3;
828 const char *proto = avio_find_protocol_name(s->filename);
829 int use_rename = proto && !strcmp(proto, "file");
830 static unsigned warned_non_file;
831 char *key_uri = NULL;
832 char *iv_string = NULL;
833 AVDictionary *options = NULL;
834 double prog_date_time = hls->initial_prog_date_time;
835 int byterange_mode = (hls->flags & HLS_SINGLE_FILE) || (hls->max_seg_size > 0);
836
837 if (byterange_mode) {
838 version = 4;
839 sequence = 0;
840 }
841
842 if (!use_rename && !warned_non_file++)
843 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
844
845 set_http_options(s, &options, hls);
846 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->filename);
847 if ((ret = s->io_open(s, &out, temp_filename, AVIO_FLAG_WRITE, &options)) < 0)
848 goto fail;
849
850 for (en = hls->segments; en; en = en->next) {
851 if (target_duration <= en->duration)
852 target_duration = get_int_from_double(en->duration);
853 }
854
855 hls->discontinuity_set = 0;
856 write_m3u8_head_block(hls, out, version, target_duration, sequence);
857 if (hls->pl_type == PLAYLIST_TYPE_EVENT) {
858 avio_printf(out, "#EXT-X-PLAYLIST-TYPE:EVENT\n");
859 } else if (hls->pl_type == PLAYLIST_TYPE_VOD) {
860 avio_printf(out, "#EXT-X-PLAYLIST-TYPE:VOD\n");
861 }
862
863 if((hls->flags & HLS_DISCONT_START) && sequence==hls->start_sequence && hls->discontinuity_set==0 ){
864 avio_printf(out, "#EXT-X-DISCONTINUITY\n");
865 hls->discontinuity_set = 1;
866 }
867 for (en = hls->segments; en; en = en->next) {
868 if (hls->key_info_file && (!key_uri || strcmp(en->key_uri, key_uri) ||
869 av_strcasecmp(en->iv_string, iv_string))) {
870 avio_printf(out, "#EXT-X-KEY:METHOD=AES-128,URI=\"%s\"", en->key_uri);
871 if (*en->iv_string)
872 avio_printf(out, ",IV=0x%s", en->iv_string);
873 avio_printf(out, "\n");
874 key_uri = en->key_uri;
875 iv_string = en->iv_string;
876 }
877
878 if (en->discont) {
879 avio_printf(out, "#EXT-X-DISCONTINUITY\n");
880 }
881
882 if (hls->flags & HLS_ROUND_DURATIONS)
883 avio_printf(out, "#EXTINF:%ld,\n", lrint(en->duration));
884 else
885 avio_printf(out, "#EXTINF:%f,\n", en->duration);
886 if (byterange_mode)
887 avio_printf(out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
888 en->size, en->pos);
889 if (hls->flags & HLS_PROGRAM_DATE_TIME) {
890 time_t tt, wrongsecs;
891 int milli;
892 struct tm *tm, tmpbuf;
893 char buf0[128], buf1[128];
894 tt = (int64_t)prog_date_time;
895 milli = av_clip(lrint(1000*(prog_date_time - tt)), 0, 999);
896 tm = localtime_r(&tt, &tmpbuf);
897 strftime(buf0, sizeof(buf0), "%Y-%m-%dT%H:%M:%S", tm);
898 if (!strftime(buf1, sizeof(buf1), "%z", tm) || buf1[1]<'0' ||buf1[1]>'2') {
899 int tz_min, dst = tm->tm_isdst;
900 tm = gmtime_r(&tt, &tmpbuf);
901 tm->tm_isdst = dst;
902 wrongsecs = mktime(tm);
903 tz_min = (abs(wrongsecs - tt) + 30) / 60;
904 snprintf(buf1, sizeof(buf1),
905 "%c%02d%02d",
906 wrongsecs <= tt ? '+' : '-',
907 tz_min / 60,
908 tz_min % 60);
909 }
910 avio_printf(out, "#EXT-X-PROGRAM-DATE-TIME:%s.%03d%s\n", buf0, milli, buf1);
911 prog_date_time += en->duration;
912 }
913 if (hls->baseurl)
914 avio_printf(out, "%s", hls->baseurl);
915 avio_printf(out, "%s\n", en->filename);
916 }
917
918 if (last && (hls->flags & HLS_OMIT_ENDLIST)==0)
919 avio_printf(out, "#EXT-X-ENDLIST\n");
920
921 if( hls->vtt_m3u8_name ) {
922 if ((ret = s->io_open(s, &sub_out, hls->vtt_m3u8_name, AVIO_FLAG_WRITE, &options)) < 0)
923 goto fail;
924 write_m3u8_head_block(hls, sub_out, version, target_duration, sequence);
925
926 for (en = hls->segments; en; en = en->next) {
927 avio_printf(sub_out, "#EXTINF:%f,\n", en->duration);
928 if (byterange_mode)
929 avio_printf(sub_out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
930 en->size, en->pos);
931 if (hls->baseurl)
932 avio_printf(sub_out, "%s", hls->baseurl);
933 avio_printf(sub_out, "%s\n", en->sub_filename);
934 }
935
936 if (last)
937 avio_printf(sub_out, "#EXT-X-ENDLIST\n");
938
939 }
940
941fail:
942 av_dict_free(&options);
943 ff_format_io_close(s, &out);
944 ff_format_io_close(s, &sub_out);
945 if (ret >= 0 && use_rename)
946 ff_rename(temp_filename, s->filename, s);
947 return ret;
948}
949
950static int hls_start(AVFormatContext *s)
951{
952 HLSContext *c = s->priv_data;
953 AVFormatContext *oc = c->avf;
954 AVFormatContext *vtt_oc = c->vtt_avf;
955 AVDictionary *options = NULL;
956 char *filename, iv_string[KEYSIZE*2 + 1];
957 int err = 0;
958
959 if (c->flags & HLS_SINGLE_FILE) {
960 av_strlcpy(oc->filename, c->basename,
961 sizeof(oc->filename));
962 if (c->vtt_basename)
963 av_strlcpy(vtt_oc->filename, c->vtt_basename,
964 sizeof(vtt_oc->filename));
965 } else if (c->max_seg_size > 0) {
966 if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename),
967#if FF_API_HLS_WRAP
968 c->basename, 'd', c->wrap ? c->sequence % c->wrap : c->sequence) < 1) {
969#else
970 c->basename, 'd', c->sequence) < 1) {
971#endif
972 av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s', you can try to use -use_localtime 1 with it\n", c->basename);
973 return AVERROR(EINVAL);
974 }
975 } else {
976 if (c->use_localtime) {
977 time_t now0;
978 struct tm *tm, tmpbuf;
979 time(&now0);
980 tm = localtime_r(&now0, &tmpbuf);
981 if (!strftime(oc->filename, sizeof(oc->filename), c->basename, tm)) {
982 av_log(oc, AV_LOG_ERROR, "Could not get segment filename with use_localtime\n");
983 return AVERROR(EINVAL);
984 }
985
986 err = sls_flag_use_localtime_filename(oc, c);
987 if (err < 0) {
988 return AVERROR(ENOMEM);
989 }
990
991 if (c->use_localtime_mkdir) {
992 const char *dir;
993 char *fn_copy = av_strdup(oc->filename);
994 if (!fn_copy) {
995 return AVERROR(ENOMEM);
996 }
997 dir = av_dirname(fn_copy);
998 if (mkdir_p(dir) == -1 && errno != EEXIST) {
999 av_log(oc, AV_LOG_ERROR, "Could not create directory %s with use_localtime_mkdir\n", dir);
1000 av_free(fn_copy);
1001 return AVERROR(errno);
1002 }
1003 av_free(fn_copy);
1004 }
1005 } else if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename),
1006#if FF_API_HLS_WRAP
1007 c->basename, 'd', c->wrap ? c->sequence % c->wrap : c->sequence) < 1) {
1008#else
1009 c->basename, 'd', c->sequence) < 1) {
1010#endif
1011 av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s' you can try to use -use_localtime 1 with it\n", c->basename);
1012 return AVERROR(EINVAL);
1013 }
1014 if( c->vtt_basename) {
1015 if (replace_int_data_in_filename(vtt_oc->filename, sizeof(vtt_oc->filename),
1016#if FF_API_HLS_WRAP
1017 c->vtt_basename, 'd', c->wrap ? c->sequence % c->wrap : c->sequence) < 1) {
1018#else
1019 c->vtt_basename, 'd', c->sequence) < 1) {
1020#endif
1021 av_log(vtt_oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", c->vtt_basename);
1022 return AVERROR(EINVAL);
1023 }
1024 }
1025 }
1026 c->number++;
1027
1028 set_http_options(s, &options, c);
1029
1030 if (c->flags & HLS_TEMP_FILE) {
1031 av_strlcat(oc->filename, ".tmp", sizeof(oc->filename));
1032 }
1033
1034 if (c->key_info_file) {
1035 if ((err = hls_encryption_start(s)) < 0)
1036 goto fail;
1037 if ((err = av_dict_set(&options, "encryption_key", c->key_string, 0))
1038 < 0)
1039 goto fail;
1040 err = av_strlcpy(iv_string, c->iv_string, sizeof(iv_string));
1041 if (!err)
1042 snprintf(iv_string, sizeof(iv_string), "%032"PRIx64, c->sequence);
1043 if ((err = av_dict_set(&options, "encryption_iv", iv_string, 0)) < 0)
1044 goto fail;
1045
1046 filename = av_asprintf("crypto:%s", oc->filename);
1047 if (!filename) {
1048 err = AVERROR(ENOMEM);
1049 goto fail;
1050 }
1051 err = s->io_open(s, &oc->pb, filename, AVIO_FLAG_WRITE, &options);
1052 av_free(filename);
1053 av_dict_free(&options);
1054 if (err < 0)
1055 return err;
1056 } else
1057 if ((err = s->io_open(s, &oc->pb, oc->filename, AVIO_FLAG_WRITE, &options)) < 0)
1058 goto fail;
1059 if (c->vtt_basename) {
1060 set_http_options(s, &options, c);
1061 if ((err = s->io_open(s, &vtt_oc->pb, vtt_oc->filename, AVIO_FLAG_WRITE, &options)) < 0)
1062 goto fail;
1063 }
1064 av_dict_free(&options);
1065
1066 /* We only require one PAT/PMT per segment. */
1067 if (oc->oformat->priv_class && oc->priv_data) {
1068 char period[21];
1069
1070 snprintf(period, sizeof(period), "%d", (INT_MAX / 2) - 1);
1071
1072 av_opt_set(oc->priv_data, "mpegts_flags", "resend_headers", 0);
1073 av_opt_set(oc->priv_data, "sdt_period", period, 0);
1074 av_opt_set(oc->priv_data, "pat_period", period, 0);
1075 }
1076
1077 if (c->vtt_basename) {
1078 err = avformat_write_header(vtt_oc,NULL);
1079 if (err < 0)
1080 return err;
1081 }
1082
1083 return 0;
1084fail:
1085 av_dict_free(&options);
1086
1087 return err;
1088}
1089
1090static const char * get_default_pattern_localtime_fmt(void)
1091{
1092 char b[21];
1093 time_t t = time(NULL);
1094 struct tm *p, tmbuf;
1095 p = localtime_r(&t, &tmbuf);
1096 // no %s support when strftime returned error or left format string unchanged
1097 // also no %s support on MSVC, which invokes the invalid parameter handler on unsupported format strings, instead of returning an error
1098 return (HAVE_LIBC_MSVCRT || !strftime(b, sizeof(b), "%s", p) || !strcmp(b, "%s")) ? "-%Y%m%d%H%M%S.ts" : "-%s.ts";
1099}
1100
1101static int hls_write_header(AVFormatContext *s)
1102{
1103 HLSContext *hls = s->priv_data;
1104 int ret, i;
1105 char *p;
1106 const char *pattern = "%d.ts";
1107 const char *pattern_localtime_fmt = get_default_pattern_localtime_fmt();
1108 const char *vtt_pattern = "%d.vtt";
1109 AVDictionary *options = NULL;
1110 int basename_size;
1111 int vtt_basename_size;
1112
1113 if ((hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH) ||
1114 (hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_FORMATTED_DATETIME)) {
1115 time_t t = time(NULL); // we will need it in either case
1116 if (hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH) {
1117 hls->start_sequence = (int64_t)t;
1118 } else if (hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_FORMATTED_DATETIME) {
1119 char b[15];
1120 struct tm *p, tmbuf;
1121 if (!(p = localtime_r(&t, &tmbuf)))
1122 return AVERROR(ENOMEM);
1123 if (!strftime(b, sizeof(b), "%Y%m%d%H%M%S", p))
1124 return AVERROR(ENOMEM);
1125 hls->start_sequence = strtoll(b, NULL, 10);
1126 }
1127 av_log(hls, AV_LOG_DEBUG, "start_number evaluated to %"PRId64"\n", hls->start_sequence);
1128 }
1129
1130 hls->sequence = hls->start_sequence;
1131 hls->recording_time = (hls->init_time ? hls->init_time : hls->time) * AV_TIME_BASE;
1132 hls->start_pts = AV_NOPTS_VALUE;
1133 hls->current_segment_final_filename_fmt[0] = '\0';
1134
1135 if (hls->flags & HLS_PROGRAM_DATE_TIME) {
1136 time_t now0;
1137 time(&now0);
1138 hls->initial_prog_date_time = now0;
1139 }
1140
1141 if (hls->format_options_str) {
1142 ret = av_dict_parse_string(&hls->format_options, hls->format_options_str, "=", ":", 0);
1143 if (ret < 0) {
1144 av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n", hls->format_options_str);
1145 goto fail;
1146 }
1147 }
1148
1149 for (i = 0; i < s->nb_streams; i++) {
1150 hls->has_video +=
1151 s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO;
1152 hls->has_subtitle +=
1153 s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE;
1154 }
1155
1156 if (hls->has_video > 1)
1157 av_log(s, AV_LOG_WARNING,
1158 "More than a single video stream present, "
1159 "expect issues decoding it.\n");
1160
1161 hls->oformat = av_guess_format("mpegts", NULL, NULL);
1162
1163 if (!hls->oformat) {
1164 ret = AVERROR_MUXER_NOT_FOUND;
1165 goto fail;
1166 }
1167
1168 if(hls->has_subtitle) {
1169 hls->vtt_oformat = av_guess_format("webvtt", NULL, NULL);
1170 if (!hls->oformat) {
1171 ret = AVERROR_MUXER_NOT_FOUND;
1172 goto fail;
1173 }
1174 }
1175
1176 if (hls->segment_filename) {
1177 hls->basename = av_strdup(hls->segment_filename);
1178 if (!hls->basename) {
1179 ret = AVERROR(ENOMEM);
1180 goto fail;
1181 }
1182 } else {
1183 if (hls->flags & HLS_SINGLE_FILE)
1184 pattern = ".ts";
1185
1186 if (hls->use_localtime) {
1187 basename_size = strlen(s->filename) + strlen(pattern_localtime_fmt) + 1;
1188 } else {
1189 basename_size = strlen(s->filename) + strlen(pattern) + 1;
1190 }
1191 hls->basename = av_malloc(basename_size);
1192 if (!hls->basename) {
1193 ret = AVERROR(ENOMEM);
1194 goto fail;
1195 }
1196
1197 av_strlcpy(hls->basename, s->filename, basename_size);
1198
1199 p = strrchr(hls->basename, '.');
1200 if (p)
1201 *p = '\0';
1202 if (hls->use_localtime) {
1203 av_strlcat(hls->basename, pattern_localtime_fmt, basename_size);
1204 } else {
1205 av_strlcat(hls->basename, pattern, basename_size);
1206 }
1207 }
1208 if (!hls->use_localtime) {
1209 ret = sls_flag_check_duration_size_index(hls);
1210 if (ret < 0) {
1211 goto fail;
1212 }
1213 } else {
1214 ret = sls_flag_check_duration_size(hls);
1215 if (ret < 0) {
1216 goto fail;
1217 }
1218 }
1219 if(hls->has_subtitle) {
1220
1221 if (hls->flags & HLS_SINGLE_FILE)
1222 vtt_pattern = ".vtt";
1223 vtt_basename_size = strlen(s->filename) + strlen(vtt_pattern) + 1;
1224 hls->vtt_basename = av_malloc(vtt_basename_size);
1225 if (!hls->vtt_basename) {
1226 ret = AVERROR(ENOMEM);
1227 goto fail;
1228 }
1229 hls->vtt_m3u8_name = av_malloc(vtt_basename_size);
1230 if (!hls->vtt_m3u8_name ) {
1231 ret = AVERROR(ENOMEM);
1232 goto fail;
1233 }
1234 av_strlcpy(hls->vtt_basename, s->filename, vtt_basename_size);
1235 p = strrchr(hls->vtt_basename, '.');
1236 if (p)
1237 *p = '\0';
1238
1239 if( hls->subtitle_filename ) {
1240 strcpy(hls->vtt_m3u8_name, hls->subtitle_filename);
1241 } else {
1242 strcpy(hls->vtt_m3u8_name, hls->vtt_basename);
1243 av_strlcat(hls->vtt_m3u8_name, "_vtt.m3u8", vtt_basename_size);
1244 }
1245 av_strlcat(hls->vtt_basename, vtt_pattern, vtt_basename_size);
1246 }
1247
1248 if ((ret = hls_mux_init(s)) < 0)
1249 goto fail;
1250
1251 if (hls->flags & HLS_APPEND_LIST) {
1252 parse_playlist(s, s->filename);
1253 hls->discontinuity = 1;
1254 if (hls->init_time > 0) {
1255 av_log(s, AV_LOG_WARNING, "append_list mode does not support hls_init_time,"
1256 " hls_init_time value will have no effect\n");
1257 hls->init_time = 0;
1258 hls->recording_time = hls->time * AV_TIME_BASE;
1259 }
1260 }
1261
1262 if ((ret = hls_start(s)) < 0)
1263 goto fail;
1264
1265 av_dict_copy(&options, hls->format_options, 0);
1266 ret = avformat_write_header(hls->avf, &options);
1267 if (av_dict_count(options)) {
1268 av_log(s, AV_LOG_ERROR, "Some of provided format options in '%s' are not recognized\n", hls->format_options_str);
1269 ret = AVERROR(EINVAL);
1270 goto fail;
1271 }
1272 //av_assert0(s->nb_streams == hls->avf->nb_streams);
1273 for (i = 0; i < s->nb_streams; i++) {
1274 AVStream *inner_st;
1275 AVStream *outer_st = s->streams[i];
1276
1277 if (hls->max_seg_size > 0) {
1278 if ((outer_st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
1279 (outer_st->codecpar->bit_rate > hls->max_seg_size)) {
1280 av_log(s, AV_LOG_WARNING, "Your video bitrate is bigger than hls_segment_size, "
1281 "(%"PRId64 " > %"PRId64 "), the result maybe not be what you want.",
1282 outer_st->codecpar->bit_rate, hls->max_seg_size);
1283 }
1284 }
1285
1286 if (outer_st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
1287 inner_st = hls->avf->streams[i];
1288 else if (hls->vtt_avf)
1289 inner_st = hls->vtt_avf->streams[0];
1290 else {
1291 /* We have a subtitle stream, when the user does not want one */
1292 inner_st = NULL;
1293 continue;
1294 }
1295 avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
1296 }
1297fail:
1298
1299 av_dict_free(&options);
1300 if (ret < 0) {
1301 av_freep(&hls->basename);
1302 av_freep(&hls->vtt_basename);
1303 if (hls->avf)
1304 avformat_free_context(hls->avf);
1305 if (hls->vtt_avf)
1306 avformat_free_context(hls->vtt_avf);
1307
1308 }
1309 return ret;
1310}
1311
1312static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
1313{
1314 HLSContext *hls = s->priv_data;
1315 AVFormatContext *oc = NULL;
1316 AVStream *st = s->streams[pkt->stream_index];
1317 int64_t end_pts = hls->recording_time * hls->number;
1318 int is_ref_pkt = 1;
1319 int ret, can_split = 1;
1320 int stream_index = 0;
1321
1322 if (hls->sequence - hls->nb_entries > hls->start_sequence && hls->init_time > 0) {
1323 /* reset end_pts, hls->recording_time at end of the init hls list */
1324 int init_list_dur = hls->init_time * hls->nb_entries * AV_TIME_BASE;
1325 int after_init_list_dur = (hls->sequence - hls->nb_entries ) * hls->time * AV_TIME_BASE;
1326 hls->recording_time = hls->time * AV_TIME_BASE;
1327 end_pts = init_list_dur + after_init_list_dur ;
1328 }
1329
1330 if( st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE ) {
1331 oc = hls->vtt_avf;
1332 stream_index = 0;
1333 } else {
1334 oc = hls->avf;
1335 stream_index = pkt->stream_index;
1336 }
1337 if (hls->start_pts == AV_NOPTS_VALUE) {
1338 hls->start_pts = pkt->pts;
1339 hls->end_pts = pkt->pts;
1340 }
1341
1342 if (hls->has_video) {
1343 can_split = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
1344 ((pkt->flags & AV_PKT_FLAG_KEY) || (hls->flags & HLS_SPLIT_BY_TIME));
1345 is_ref_pkt = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO;
1346 }
1347 if (pkt->pts == AV_NOPTS_VALUE)
1348 is_ref_pkt = can_split = 0;
1349
1350 if (is_ref_pkt) {
1351 if (hls->new_start) {
1352 hls->new_start = 0;
1353 hls->duration = (double)(pkt->pts - hls->end_pts)
1354 * st->time_base.num / st->time_base.den;
1355 hls->dpp = (double)(pkt->duration) * st->time_base.num / st->time_base.den;
1356 } else {
1357 if (pkt->duration) {
1358 hls->duration += (double)(pkt->duration) * st->time_base.num / st->time_base.den;
1359 } else {
1360 av_log(s, AV_LOG_WARNING, "pkt->duration = 0, maybe the hls segment duration will not precise\n");
1361 hls->duration = (double)(pkt->pts - hls->end_pts) * st->time_base.num / st->time_base.den;
1362 }
1363 }
1364
1365 }
1366 if (can_split && av_compare_ts(pkt->pts - hls->start_pts, st->time_base,
1367 end_pts, AV_TIME_BASE_Q) >= 0) {
1368 int64_t new_start_pos;
1369 char *old_filename = av_strdup(hls->avf->filename);
1370 int byterange_mode = (hls->flags & HLS_SINGLE_FILE) || (hls->max_seg_size > 0);
1371
1372 if (!old_filename) {
1373 return AVERROR(ENOMEM);
1374 }
1375
1376 av_write_frame(oc, NULL); /* Flush any buffered data */
1377
1378 new_start_pos = avio_tell(hls->avf->pb);
1379 hls->size = new_start_pos - hls->start_pos;
1380
1381 if (!byterange_mode) {
1382 ff_format_io_close(s, &oc->pb);
1383 if (hls->vtt_avf) {
1384 ff_format_io_close(s, &hls->vtt_avf->pb);
1385 }
1386 }
1387 if ((hls->flags & HLS_TEMP_FILE) && oc->filename[0]) {
1388 if (!(hls->flags & HLS_SINGLE_FILE) || (hls->max_seg_size <= 0))
1389 if (hls->avf->oformat->priv_class && hls->avf->priv_data)
1390 av_opt_set(hls->avf->priv_data, "mpegts_flags", "resend_headers", 0);
1391 hls_rename_temp_file(s, oc);
1392 }
1393
1394 ret = hls_append_segment(s, hls, hls->duration, hls->start_pos, hls->size);
1395 hls->start_pos = new_start_pos;
1396 if (ret < 0) {
1397 av_free(old_filename);
1398 return ret;
1399 }
1400
1401 hls->end_pts = pkt->pts;
1402 hls->duration = 0;
1403
1404 if (hls->flags & HLS_SINGLE_FILE) {
1405 hls->number++;
1406 } else if (hls->max_seg_size > 0) {
1407 if (hls->start_pos >= hls->max_seg_size) {
1408 hls->sequence++;
1409 sls_flag_file_rename(hls, old_filename);
1410 ret = hls_start(s);
1411 hls->start_pos = 0;
1412 /* When split segment by byte, the duration is short than hls_time,
1413 * so it is not enough one segment duration as hls_time, */
1414 hls->number--;
1415 }
1416 hls->number++;
1417 } else {
1418 sls_flag_file_rename(hls, old_filename);
1419 ret = hls_start(s);
1420 }
1421
1422 if (ret < 0) {
1423 av_free(old_filename);
1424 return ret;
1425 }
1426
1427 if ((ret = hls_window(s, 0)) < 0) {
1428 av_free(old_filename);
1429 return ret;
1430 }
1431 }
1432
1433 ret = ff_write_chained(oc, stream_index, pkt, s, 0);
1434
1435 return ret;
1436}
1437
1438static int hls_write_trailer(struct AVFormatContext *s)
1439{
1440 HLSContext *hls = s->priv_data;
1441 AVFormatContext *oc = hls->avf;
1442 AVFormatContext *vtt_oc = hls->vtt_avf;
1443 char *old_filename = av_strdup(hls->avf->filename);
1444
1445 if (!old_filename) {
1446 return AVERROR(ENOMEM);
1447 }
1448
1449
1450 av_write_trailer(oc);
1451 if (oc->pb) {
1452 hls->size = avio_tell(hls->avf->pb) - hls->start_pos;
1453 ff_format_io_close(s, &oc->pb);
1454
1455 if ((hls->flags & HLS_TEMP_FILE) && oc->filename[0]) {
1456 hls_rename_temp_file(s, oc);
1457 }
1458
1459 /* after av_write_trailer, then duration + 1 duration per packet */
1460 hls_append_segment(s, hls, hls->duration + hls->dpp, hls->start_pos, hls->size);
1461 }
1462
1463 sls_flag_file_rename(hls, old_filename);
1464
1465 if (vtt_oc) {
1466 if (vtt_oc->pb)
1467 av_write_trailer(vtt_oc);
1468 hls->size = avio_tell(hls->vtt_avf->pb) - hls->start_pos;
1469 ff_format_io_close(s, &vtt_oc->pb);
1470 }
1471 av_freep(&hls->basename);
1472 avformat_free_context(oc);
1473
1474 hls->avf = NULL;
1475 hls_window(s, 1);
1476
1477 if (vtt_oc) {
1478 av_freep(&hls->vtt_basename);
1479 av_freep(&hls->vtt_m3u8_name);
1480 avformat_free_context(vtt_oc);
1481 }
1482
1483 hls_free_segments(hls->segments);
1484 hls_free_segments(hls->old_segments);
1485 av_free(old_filename);
1486 return 0;
1487}
1488
1489#define OFFSET(x) offsetof(HLSContext, x)
1490#define E AV_OPT_FLAG_ENCODING_PARAM
1491static const AVOption options[] = {
1492 {"start_number", "set first number in the sequence", OFFSET(start_sequence),AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, E},
1493 {"hls_time", "set segment length in seconds", OFFSET(time), AV_OPT_TYPE_FLOAT, {.dbl = 2}, 0, FLT_MAX, E},
1494 {"hls_init_time", "set segment length in seconds at init list", OFFSET(init_time), AV_OPT_TYPE_FLOAT, {.dbl = 0}, 0, FLT_MAX, E},
1495 {"hls_list_size", "set maximum number of playlist entries", OFFSET(max_nb_segments), AV_OPT_TYPE_INT, {.i64 = 5}, 0, INT_MAX, E},
1496 {"hls_ts_options","set hls mpegts list of options for the container format used for hls", OFFSET(format_options_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1497 {"hls_vtt_options","set hls vtt list of options for the container format used for hls", OFFSET(vtt_format_options_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1498#if FF_API_HLS_WRAP
1499 {"hls_wrap", "set number after which the index wraps (will be deprecated)", OFFSET(wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E},
1500#endif
1501 {"hls_allow_cache", "explicitly set whether the client MAY (1) or MUST NOT (0) cache media segments", OFFSET(allowcache), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, E},
1502 {"hls_base_url", "url to prepend to each playlist entry", OFFSET(baseurl), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1503 {"hls_segment_filename", "filename template for segment files", OFFSET(segment_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1504 {"hls_segment_size", "maximum size per segment file, (in bytes)", OFFSET(max_seg_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E},
1505 {"hls_key_info_file", "file with key URI and key file path", OFFSET(key_info_file), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1506 {"hls_subtitle_path", "set path of hls subtitles", OFFSET(subtitle_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1507 {"hls_flags", "set flags affecting HLS playlist and media file generation", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0 }, 0, UINT_MAX, E, "flags"},
1508 {"single_file", "generate a single media file indexed with byte ranges", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SINGLE_FILE }, 0, UINT_MAX, E, "flags"},
1509 {"temp_file", "write segment to temporary file and rename when complete", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_TEMP_FILE }, 0, UINT_MAX, E, "flags"},
1510 {"delete_segments", "delete segment files that are no longer part of the playlist", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_DELETE_SEGMENTS }, 0, UINT_MAX, E, "flags"},
1511 {"round_durations", "round durations in m3u8 to whole numbers", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_ROUND_DURATIONS }, 0, UINT_MAX, E, "flags"},
1512 {"discont_start", "start the playlist with a discontinuity tag", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_DISCONT_START }, 0, UINT_MAX, E, "flags"},
1513 {"omit_endlist", "Do not append an endlist when ending stream", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_OMIT_ENDLIST }, 0, UINT_MAX, E, "flags"},
1514 {"split_by_time", "split the hls segment by time which user set by hls_time", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SPLIT_BY_TIME }, 0, UINT_MAX, E, "flags"},
1515 {"append_list", "append the new segments into old hls segment list", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_APPEND_LIST }, 0, UINT_MAX, E, "flags"},
1516 {"program_date_time", "add EXT-X-PROGRAM-DATE-TIME", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_PROGRAM_DATE_TIME }, 0, UINT_MAX, E, "flags"},
1517 {"second_level_segment_index", "include segment index in segment filenames when use_localtime", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SECOND_LEVEL_SEGMENT_INDEX }, 0, UINT_MAX, E, "flags"},
1518 {"second_level_segment_duration", "include segment duration in segment filenames when use_localtime", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SECOND_LEVEL_SEGMENT_DURATION }, 0, UINT_MAX, E, "flags"},
1519 {"second_level_segment_size", "include segment size in segment filenames when use_localtime", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SECOND_LEVEL_SEGMENT_SIZE }, 0, UINT_MAX, E, "flags"},
1520 {"use_localtime", "set filename expansion with strftime at segment creation", OFFSET(use_localtime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1521 {"use_localtime_mkdir", "create last directory component in strftime-generated filename", OFFSET(use_localtime_mkdir), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
1522 {"hls_playlist_type", "set the HLS playlist type", OFFSET(pl_type), AV_OPT_TYPE_INT, {.i64 = PLAYLIST_TYPE_NONE }, 0, PLAYLIST_TYPE_NB-1, E, "pl_type" },
1523 {"event", "EVENT playlist", 0, AV_OPT_TYPE_CONST, {.i64 = PLAYLIST_TYPE_EVENT }, INT_MIN, INT_MAX, E, "pl_type" },
1524 {"vod", "VOD playlist", 0, AV_OPT_TYPE_CONST, {.i64 = PLAYLIST_TYPE_VOD }, INT_MIN, INT_MAX, E, "pl_type" },
1525 {"method", "set the HTTP method(default: PUT)", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
1526 {"hls_start_number_source", "set source of first number in sequence", OFFSET(start_sequence_source_type), AV_OPT_TYPE_INT, {.i64 = HLS_START_SEQUENCE_AS_START_NUMBER }, 0, HLS_START_SEQUENCE_AS_FORMATTED_DATETIME, E, "start_sequence_source_type" },
1527 {"generic", "start_number value (default)", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_START_SEQUENCE_AS_START_NUMBER }, INT_MIN, INT_MAX, E, "start_sequence_source_type" },
1528 {"epoch", "seconds since epoch", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH }, INT_MIN, INT_MAX, E, "start_sequence_source_type" },
1529 {"datetime", "current datetime as YYYYMMDDhhmmss", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_START_SEQUENCE_AS_FORMATTED_DATETIME }, INT_MIN, INT_MAX, E, "start_sequence_source_type" },
1530 { NULL },
1531};
1532
1533static const AVClass hls_class = {
1534 .class_name = "hls muxer",
1535 .item_name = av_default_item_name,
1536 .option = options,
1537 .version = LIBAVUTIL_VERSION_INT,
1538};
1539
1540
1541AVOutputFormat ff_hls_muxer = {
1542 .name = "hls",
1543 .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
1544 .extensions = "m3u8",
1545 .priv_data_size = sizeof(HLSContext),
1546 .audio_codec = AV_CODEC_ID_AAC,
1547 .video_codec = AV_CODEC_ID_H264,
1548 .subtitle_codec = AV_CODEC_ID_WEBVTT,
1549 .flags = AVFMT_NOFILE | AVFMT_ALLOW_FLUSH,
1550 .write_header = hls_write_header,
1551 .write_packet = hls_write_packet,
1552 .write_trailer = hls_write_trailer,
1553 .priv_class = &hls_class,
1554};
1555
generated by cgit at 2024-05-17 01:49:13 (GMT)