2 * Apple HTTP Live Streaming segmenter
3 * Copyright (c) 2012, Luca Barbato
5 * This file is part of FFmpeg.
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.
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.
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
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"
38 #include "avio_internal.h"
40 #include "os_support.h"
43 #define LINE_BUFFER_SIZE 1024
45 typedef struct HLSSegment {
47 char sub_filename[1024];
48 double duration; /* in seconds */
52 char key_uri[LINE_BUFFER_SIZE + 1];
53 char iv_string[KEYSIZE*2 + 1];
55 struct HLSSegment *next;
58 typedef enum HLSFlags {
59 // Generate a single media file and use byte ranges in the playlist.
60 HLS_SINGLE_FILE = (1 << 0),
61 HLS_DELETE_SEGMENTS = (1 << 1),
62 HLS_ROUND_DURATIONS = (1 << 2),
63 HLS_DISCONT_START = (1 << 3),
64 HLS_OMIT_ENDLIST = (1 << 4),
67 typedef struct HLSContext {
68 const AVClass *class; // Class for private options.
71 int64_t start_sequence;
72 AVOutputFormat *oformat;
73 AVOutputFormat *vtt_oformat;
76 AVFormatContext *vtt_avf;
78 float time; // Set by a private option.
79 int max_nb_segments; // Set by a private option.
80 int wrap; // Set by a private option.
81 uint32_t flags; // enum HLSFlags
82 char *segment_filename;
84 int use_localtime; ///< flag to expand filename with localtime
85 int use_localtime_mkdir;///< flag to mkdir dirname in timebased filename
87 int64_t recording_time;
92 double duration; // last segment duration computed so far, in seconds
93 int64_t start_pos; // last segment starting position
94 int64_t size; // last segment size
96 int discontinuity_set;
99 HLSSegment *last_segment;
100 HLSSegment *old_segments;
106 char *format_options_str;
107 char *vtt_format_options_str;
108 char *subtitle_filename;
109 AVDictionary *format_options;
112 char key_file[LINE_BUFFER_SIZE + 1];
113 char key_uri[LINE_BUFFER_SIZE + 1];
114 char key_string[KEYSIZE*2 + 1];
115 char iv_string[KEYSIZE*2 + 1];
116 AVDictionary *vtt_format_options;
122 static int hls_delete_old_segments(HLSContext *hls) {
124 HLSSegment *segment, *previous_segment = NULL;
125 float playlist_duration = 0.0f;
126 int ret = 0, path_size, sub_path_size;
127 char *dirname = NULL, *p, *sub_path;
130 segment = hls->segments;
132 playlist_duration += segment->duration;
133 segment = segment->next;
136 segment = hls->old_segments;
138 playlist_duration -= segment->duration;
139 previous_segment = segment;
140 segment = previous_segment->next;
141 if (playlist_duration <= -previous_segment->duration) {
142 previous_segment->next = NULL;
148 if (hls->segment_filename) {
149 dirname = av_strdup(hls->segment_filename);
151 dirname = av_strdup(hls->avf->filename);
154 ret = AVERROR(ENOMEM);
157 p = (char *)av_basename(dirname);
162 av_log(hls, AV_LOG_DEBUG, "deleting old segment %s\n",
164 path_size = strlen(dirname) + strlen(segment->filename) + 1;
165 path = av_malloc(path_size);
167 ret = AVERROR(ENOMEM);
171 av_strlcpy(path, dirname, path_size);
172 av_strlcat(path, segment->filename, path_size);
173 if (unlink(path) < 0) {
174 av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
175 path, strerror(errno));
178 if (segment->sub_filename[0] != '\0') {
179 sub_path_size = strlen(dirname) + strlen(segment->sub_filename) + 1;
180 sub_path = av_malloc(sub_path_size);
182 ret = AVERROR(ENOMEM);
186 av_strlcpy(sub_path, dirname, sub_path_size);
187 av_strlcat(sub_path, segment->sub_filename, sub_path_size);
188 if (unlink(sub_path) < 0) {
189 av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
190 sub_path, strerror(errno));
195 previous_segment = segment;
196 segment = previous_segment->next;
197 av_free(previous_segment);
207 static int hls_encryption_start(AVFormatContext *s)
209 HLSContext *hls = s->priv_data;
212 uint8_t key[KEYSIZE];
214 if ((ret = s->io_open(s, &pb, hls->key_info_file, AVIO_FLAG_READ, NULL)) < 0) {
215 av_log(hls, AV_LOG_ERROR,
216 "error opening key info file %s\n", hls->key_info_file);
220 ff_get_line(pb, hls->key_uri, sizeof(hls->key_uri));
221 hls->key_uri[strcspn(hls->key_uri, "\r\n")] = '\0';
223 ff_get_line(pb, hls->key_file, sizeof(hls->key_file));
224 hls->key_file[strcspn(hls->key_file, "\r\n")] = '\0';
226 ff_get_line(pb, hls->iv_string, sizeof(hls->iv_string));
227 hls->iv_string[strcspn(hls->iv_string, "\r\n")] = '\0';
229 ff_format_io_close(s, &pb);
231 if (!*hls->key_uri) {
232 av_log(hls, AV_LOG_ERROR, "no key URI specified in key info file\n");
233 return AVERROR(EINVAL);
236 if (!*hls->key_file) {
237 av_log(hls, AV_LOG_ERROR, "no key file specified in key info file\n");
238 return AVERROR(EINVAL);
241 if ((ret = s->io_open(s, &pb, hls->key_file, AVIO_FLAG_READ, NULL)) < 0) {
242 av_log(hls, AV_LOG_ERROR, "error opening key file %s\n", hls->key_file);
246 ret = avio_read(pb, key, sizeof(key));
247 ff_format_io_close(s, &pb);
248 if (ret != sizeof(key)) {
249 av_log(hls, AV_LOG_ERROR, "error reading key file %s\n", hls->key_file);
250 if (ret >= 0 || ret == AVERROR_EOF)
251 ret = AVERROR(EINVAL);
254 ff_data_to_hex(hls->key_string, key, sizeof(key), 0);
259 static int hls_mux_init(AVFormatContext *s)
261 HLSContext *hls = s->priv_data;
263 AVFormatContext *vtt_oc = NULL;
266 ret = avformat_alloc_output_context2(&hls->avf, hls->oformat, NULL, NULL);
271 oc->oformat = hls->oformat;
272 oc->interrupt_callback = s->interrupt_callback;
273 oc->max_delay = s->max_delay;
274 oc->opaque = s->opaque;
275 oc->io_open = s->io_open;
276 oc->io_close = s->io_close;
277 av_dict_copy(&oc->metadata, s->metadata, 0);
279 if(hls->vtt_oformat) {
280 ret = avformat_alloc_output_context2(&hls->vtt_avf, hls->vtt_oformat, NULL, NULL);
283 vtt_oc = hls->vtt_avf;
284 vtt_oc->oformat = hls->vtt_oformat;
285 av_dict_copy(&vtt_oc->metadata, s->metadata, 0);
288 for (i = 0; i < s->nb_streams; i++) {
290 AVFormatContext *loc;
291 if (s->streams[i]->codec->codec_type == AVMEDIA_TYPE_SUBTITLE)
296 if (!(st = avformat_new_stream(loc, NULL)))
297 return AVERROR(ENOMEM);
298 avcodec_copy_context(st->codec, s->streams[i]->codec);
299 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
300 st->time_base = s->streams[i]->time_base;
307 /* Create a new segment and append it to the segment list */
308 static int hls_append_segment(struct AVFormatContext *s, HLSContext *hls, double duration,
309 int64_t pos, int64_t size)
311 HLSSegment *en = av_malloc(sizeof(*en));
313 const char *pl_dir, *filename;
317 return AVERROR(ENOMEM);
319 filename = av_basename(hls->avf->filename);
321 if (hls->use_localtime_mkdir) {
322 /* Possibly prefix with mkdir'ed subdir, if playlist share same
324 tmp = av_strdup(s->filename);
327 return AVERROR(ENOMEM);
330 pl_dir = av_dirname(tmp);
331 p = hls->avf->filename;
332 if (strstr(p, pl_dir) == p)
333 filename = hls->avf->filename + strlen(pl_dir) + 1;
336 av_strlcpy(en->filename, filename, sizeof(en->filename));
338 if(hls->has_subtitle)
339 av_strlcpy(en->sub_filename, av_basename(hls->vtt_avf->filename), sizeof(en->sub_filename));
341 en->sub_filename[0] = '\0';
343 en->duration = duration;
348 if (hls->key_info_file) {
349 av_strlcpy(en->key_uri, hls->key_uri, sizeof(en->key_uri));
350 av_strlcpy(en->iv_string, hls->iv_string, sizeof(en->iv_string));
356 hls->last_segment->next = en;
358 hls->last_segment = en;
360 if (hls->max_nb_segments && hls->nb_entries >= hls->max_nb_segments) {
362 hls->segments = en->next;
363 if (en && hls->flags & HLS_DELETE_SEGMENTS &&
364 !(hls->flags & HLS_SINGLE_FILE || hls->wrap)) {
365 en->next = hls->old_segments;
366 hls->old_segments = en;
367 if ((ret = hls_delete_old_segments(hls)) < 0)
379 static void hls_free_segments(HLSSegment *p)
390 static void set_http_options(AVDictionary **options, HLSContext *c)
393 av_dict_set(options, "method", c->method, 0);
396 static int hls_window(AVFormatContext *s, int last)
398 HLSContext *hls = s->priv_data;
400 int target_duration = 0;
402 AVIOContext *out = NULL;
403 AVIOContext *sub_out = NULL;
404 char temp_filename[1024];
405 int64_t sequence = FFMAX(hls->start_sequence, hls->sequence - hls->nb_entries);
406 int version = hls->flags & HLS_SINGLE_FILE ? 4 : 3;
407 const char *proto = avio_find_protocol_name(s->filename);
408 int use_rename = proto && !strcmp(proto, "file");
409 static unsigned warned_non_file;
410 char *key_uri = NULL;
411 char *iv_string = NULL;
412 AVDictionary *options = NULL;
414 if (!use_rename && !warned_non_file++)
415 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporarly partial files\n");
417 set_http_options(&options, hls);
418 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->filename);
419 if ((ret = s->io_open(s, &out, temp_filename, AVIO_FLAG_WRITE, NULL)) < 0)
422 for (en = hls->segments; en; en = en->next) {
423 if (target_duration < en->duration)
424 target_duration = ceil(en->duration);
427 hls->discontinuity_set = 0;
428 avio_printf(out, "#EXTM3U\n");
429 avio_printf(out, "#EXT-X-VERSION:%d\n", version);
430 if (hls->allowcache == 0 || hls->allowcache == 1) {
431 avio_printf(out, "#EXT-X-ALLOW-CACHE:%s\n", hls->allowcache == 0 ? "NO" : "YES");
433 avio_printf(out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
434 avio_printf(out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
436 av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n",
438 if((hls->flags & HLS_DISCONT_START) && sequence==hls->start_sequence && hls->discontinuity_set==0 ){
439 avio_printf(out, "#EXT-X-DISCONTINUITY\n");
440 hls->discontinuity_set = 1;
442 for (en = hls->segments; en; en = en->next) {
443 if (hls->key_info_file && (!key_uri || strcmp(en->key_uri, key_uri) ||
444 av_strcasecmp(en->iv_string, iv_string))) {
445 avio_printf(out, "#EXT-X-KEY:METHOD=AES-128,URI=\"%s\"", en->key_uri);
447 avio_printf(out, ",IV=0x%s", en->iv_string);
448 avio_printf(out, "\n");
449 key_uri = en->key_uri;
450 iv_string = en->iv_string;
453 if (hls->flags & HLS_ROUND_DURATIONS)
454 avio_printf(out, "#EXTINF:%ld,\n", lrint(en->duration));
456 avio_printf(out, "#EXTINF:%f,\n", en->duration);
457 if (hls->flags & HLS_SINGLE_FILE)
458 avio_printf(out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
461 avio_printf(out, "%s", hls->baseurl);
462 avio_printf(out, "%s\n", en->filename);
465 if (last && (hls->flags & HLS_OMIT_ENDLIST)==0)
466 avio_printf(out, "#EXT-X-ENDLIST\n");
468 if( hls->vtt_m3u8_name ) {
469 if ((ret = s->io_open(s, &sub_out, hls->vtt_m3u8_name, AVIO_FLAG_WRITE, &options)) < 0)
471 avio_printf(sub_out, "#EXTM3U\n");
472 avio_printf(sub_out, "#EXT-X-VERSION:%d\n", version);
473 if (hls->allowcache == 0 || hls->allowcache == 1) {
474 avio_printf(sub_out, "#EXT-X-ALLOW-CACHE:%s\n", hls->allowcache == 0 ? "NO" : "YES");
476 avio_printf(sub_out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
477 avio_printf(sub_out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
479 av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n",
482 for (en = hls->segments; en; en = en->next) {
483 avio_printf(sub_out, "#EXTINF:%f,\n", en->duration);
484 if (hls->flags & HLS_SINGLE_FILE)
485 avio_printf(sub_out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
488 avio_printf(sub_out, "%s", hls->baseurl);
489 avio_printf(sub_out, "%s\n", en->sub_filename);
493 avio_printf(sub_out, "#EXT-X-ENDLIST\n");
498 av_dict_free(&options);
499 ff_format_io_close(s, &out);
500 ff_format_io_close(s, &sub_out);
501 if (ret >= 0 && use_rename)
502 ff_rename(temp_filename, s->filename, s);
506 static int hls_start(AVFormatContext *s)
508 HLSContext *c = s->priv_data;
509 AVFormatContext *oc = c->avf;
510 AVFormatContext *vtt_oc = c->vtt_avf;
511 AVDictionary *options = NULL;
512 char *filename, iv_string[KEYSIZE*2 + 1];
515 if (c->flags & HLS_SINGLE_FILE) {
516 av_strlcpy(oc->filename, c->basename,
517 sizeof(oc->filename));
519 av_strlcpy(vtt_oc->filename, c->vtt_basename,
520 sizeof(vtt_oc->filename));
522 if (c->use_localtime) {
524 struct tm *tm, tmpbuf;
526 tm = localtime_r(&now0, &tmpbuf);
527 if (!strftime(oc->filename, sizeof(oc->filename), c->basename, tm)) {
528 av_log(oc, AV_LOG_ERROR, "Could not get segment filename with use_localtime\n");
529 return AVERROR(EINVAL);
532 if (c->use_localtime_mkdir) {
534 char *fn_copy = av_strdup(oc->filename);
536 return AVERROR(ENOMEM);
538 dir = av_dirname(fn_copy);
539 if (mkdir(dir, 0777) == -1 && errno != EEXIST) {
540 av_log(oc, AV_LOG_ERROR, "Could not create directory %s with use_localtime_mkdir\n", dir);
542 return AVERROR(errno);
546 } else if (av_get_frame_filename(oc->filename, sizeof(oc->filename),
547 c->basename, c->wrap ? c->sequence % c->wrap : c->sequence) < 0) {
548 av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s' you can try use -use_localtime 1 with it\n", c->basename);
549 return AVERROR(EINVAL);
551 if( c->vtt_basename) {
552 if (av_get_frame_filename(vtt_oc->filename, sizeof(vtt_oc->filename),
553 c->vtt_basename, c->wrap ? c->sequence % c->wrap : c->sequence) < 0) {
554 av_log(vtt_oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", c->vtt_basename);
555 return AVERROR(EINVAL);
561 set_http_options(&options, c);
563 if (c->key_info_file) {
564 if ((err = hls_encryption_start(s)) < 0)
566 if ((err = av_dict_set(&options, "encryption_key", c->key_string, 0))
569 err = av_strlcpy(iv_string, c->iv_string, sizeof(iv_string));
571 snprintf(iv_string, sizeof(iv_string), "%032"PRIx64, c->sequence);
572 if ((err = av_dict_set(&options, "encryption_iv", iv_string, 0)) < 0)
575 filename = av_asprintf("crypto:%s", oc->filename);
577 err = AVERROR(ENOMEM);
580 err = s->io_open(s, &oc->pb, filename, AVIO_FLAG_WRITE, &options);
582 av_dict_free(&options);
586 if ((err = s->io_open(s, &oc->pb, oc->filename, AVIO_FLAG_WRITE, &options)) < 0)
588 if (c->vtt_basename) {
589 set_http_options(&options, c);
590 if ((err = s->io_open(s, &vtt_oc->pb, vtt_oc->filename, AVIO_FLAG_WRITE, &options)) < 0)
593 av_dict_free(&options);
595 /* We only require one PAT/PMT per segment. */
596 if (oc->oformat->priv_class && oc->priv_data) {
599 snprintf(period, sizeof(period), "%d", (INT_MAX / 2) - 1);
601 av_opt_set(oc->priv_data, "mpegts_flags", "resend_headers", 0);
602 av_opt_set(oc->priv_data, "sdt_period", period, 0);
603 av_opt_set(oc->priv_data, "pat_period", period, 0);
606 if (c->vtt_basename) {
607 err = avformat_write_header(vtt_oc,NULL);
614 av_dict_free(&options);
619 static int hls_write_header(AVFormatContext *s)
621 HLSContext *hls = s->priv_data;
624 const char *pattern = "%d.ts";
625 const char *pattern_localtime_fmt = "-%s.ts";
626 const char *vtt_pattern = "%d.vtt";
627 AVDictionary *options = NULL;
629 int vtt_basename_size;
631 hls->sequence = hls->start_sequence;
632 hls->recording_time = hls->time * AV_TIME_BASE;
633 hls->start_pts = AV_NOPTS_VALUE;
635 if (hls->format_options_str) {
636 ret = av_dict_parse_string(&hls->format_options, hls->format_options_str, "=", ":", 0);
638 av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n", hls->format_options_str);
643 for (i = 0; i < s->nb_streams; i++) {
645 s->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO;
647 s->streams[i]->codec->codec_type == AVMEDIA_TYPE_SUBTITLE;
650 if (hls->has_video > 1)
651 av_log(s, AV_LOG_WARNING,
652 "More than a single video stream present, "
653 "expect issues decoding it.\n");
655 hls->oformat = av_guess_format("mpegts", NULL, NULL);
658 ret = AVERROR_MUXER_NOT_FOUND;
662 if(hls->has_subtitle) {
663 hls->vtt_oformat = av_guess_format("webvtt", NULL, NULL);
665 ret = AVERROR_MUXER_NOT_FOUND;
670 if (hls->segment_filename) {
671 hls->basename = av_strdup(hls->segment_filename);
672 if (!hls->basename) {
673 ret = AVERROR(ENOMEM);
677 if (hls->flags & HLS_SINGLE_FILE)
680 if (hls->use_localtime) {
681 basename_size = strlen(s->filename) + strlen(pattern_localtime_fmt) + 1;
683 basename_size = strlen(s->filename) + strlen(pattern) + 1;
685 hls->basename = av_malloc(basename_size);
686 if (!hls->basename) {
687 ret = AVERROR(ENOMEM);
691 av_strlcpy(hls->basename, s->filename, basename_size);
693 p = strrchr(hls->basename, '.');
696 if (hls->use_localtime) {
697 av_strlcat(hls->basename, pattern_localtime_fmt, basename_size);
699 av_strlcat(hls->basename, pattern, basename_size);
703 if(hls->has_subtitle) {
705 if (hls->flags & HLS_SINGLE_FILE)
706 vtt_pattern = ".vtt";
707 vtt_basename_size = strlen(s->filename) + strlen(vtt_pattern) + 1;
708 hls->vtt_basename = av_malloc(vtt_basename_size);
709 if (!hls->vtt_basename) {
710 ret = AVERROR(ENOMEM);
713 hls->vtt_m3u8_name = av_malloc(vtt_basename_size);
714 if (!hls->vtt_m3u8_name ) {
715 ret = AVERROR(ENOMEM);
718 av_strlcpy(hls->vtt_basename, s->filename, vtt_basename_size);
719 p = strrchr(hls->vtt_basename, '.');
723 if( hls->subtitle_filename ) {
724 strcpy(hls->vtt_m3u8_name, hls->subtitle_filename);
726 strcpy(hls->vtt_m3u8_name, hls->vtt_basename);
727 av_strlcat(hls->vtt_m3u8_name, "_vtt.m3u8", vtt_basename_size);
729 av_strlcat(hls->vtt_basename, vtt_pattern, vtt_basename_size);
732 if ((ret = hls_mux_init(s)) < 0)
735 if ((ret = hls_start(s)) < 0)
738 av_dict_copy(&options, hls->format_options, 0);
739 ret = avformat_write_header(hls->avf, &options);
740 if (av_dict_count(options)) {
741 av_log(s, AV_LOG_ERROR, "Some of provided format options in '%s' are not recognized\n", hls->format_options_str);
742 ret = AVERROR(EINVAL);
745 //av_assert0(s->nb_streams == hls->avf->nb_streams);
746 for (i = 0; i < s->nb_streams; i++) {
748 AVStream *outer_st = s->streams[i];
749 if (outer_st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)
750 inner_st = hls->avf->streams[i];
751 else if (hls->vtt_avf)
752 inner_st = hls->vtt_avf->streams[0];
754 /* We have a subtitle stream, when the user does not want one */
758 avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
762 av_dict_free(&options);
764 av_freep(&hls->basename);
765 av_freep(&hls->vtt_basename);
767 avformat_free_context(hls->avf);
769 avformat_free_context(hls->vtt_avf);
775 static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
777 HLSContext *hls = s->priv_data;
778 AVFormatContext *oc = NULL;
779 AVStream *st = s->streams[pkt->stream_index];
780 int64_t end_pts = hls->recording_time * hls->number;
782 int ret, can_split = 1;
783 int stream_index = 0;
785 if( st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE ) {
790 stream_index = pkt->stream_index;
792 if (hls->start_pts == AV_NOPTS_VALUE) {
793 hls->start_pts = pkt->pts;
794 hls->end_pts = pkt->pts;
797 if (hls->has_video) {
798 can_split = st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
799 pkt->flags & AV_PKT_FLAG_KEY;
800 is_ref_pkt = st->codec->codec_type == AVMEDIA_TYPE_VIDEO;
802 if (pkt->pts == AV_NOPTS_VALUE)
803 is_ref_pkt = can_split = 0;
806 hls->duration = (double)(pkt->pts - hls->end_pts)
807 * st->time_base.num / st->time_base.den;
809 if (can_split && av_compare_ts(pkt->pts - hls->start_pts, st->time_base,
810 end_pts, AV_TIME_BASE_Q) >= 0) {
811 int64_t new_start_pos;
812 av_write_frame(oc, NULL); /* Flush any buffered data */
814 new_start_pos = avio_tell(hls->avf->pb);
815 hls->size = new_start_pos - hls->start_pos;
816 ret = hls_append_segment(s, hls, hls->duration, hls->start_pos, hls->size);
817 hls->start_pos = new_start_pos;
821 hls->end_pts = pkt->pts;
824 if (hls->flags & HLS_SINGLE_FILE) {
825 if (hls->avf->oformat->priv_class && hls->avf->priv_data)
826 av_opt_set(hls->avf->priv_data, "mpegts_flags", "resend_headers", 0);
829 ff_format_io_close(s, &oc->pb);
831 ff_format_io_close(s, &hls->vtt_avf->pb);
839 if( st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE )
844 if ((ret = hls_window(s, 0)) < 0)
848 ret = ff_write_chained(oc, stream_index, pkt, s, 0);
853 static int hls_write_trailer(struct AVFormatContext *s)
855 HLSContext *hls = s->priv_data;
856 AVFormatContext *oc = hls->avf;
857 AVFormatContext *vtt_oc = hls->vtt_avf;
859 av_write_trailer(oc);
861 hls->size = avio_tell(hls->avf->pb) - hls->start_pos;
862 ff_format_io_close(s, &oc->pb);
863 hls_append_segment(s, hls, hls->duration, hls->start_pos, hls->size);
868 av_write_trailer(vtt_oc);
869 hls->size = avio_tell(hls->vtt_avf->pb) - hls->start_pos;
870 ff_format_io_close(s, &vtt_oc->pb);
872 av_freep(&hls->basename);
873 avformat_free_context(oc);
876 av_freep(&hls->vtt_basename);
877 av_freep(&hls->vtt_m3u8_name);
878 avformat_free_context(vtt_oc);
884 hls_free_segments(hls->segments);
885 hls_free_segments(hls->old_segments);
889 #define OFFSET(x) offsetof(HLSContext, x)
890 #define E AV_OPT_FLAG_ENCODING_PARAM
891 static const AVOption options[] = {
892 {"start_number", "set first number in the sequence", OFFSET(start_sequence),AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, E},
893 {"hls_time", "set segment length in seconds", OFFSET(time), AV_OPT_TYPE_FLOAT, {.dbl = 2}, 0, FLT_MAX, E},
894 {"hls_list_size", "set maximum number of playlist entries", OFFSET(max_nb_segments), AV_OPT_TYPE_INT, {.i64 = 5}, 0, INT_MAX, E},
895 {"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},
896 {"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},
897 {"hls_wrap", "set number after which the index wraps", OFFSET(wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E},
898 {"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},
899 {"hls_base_url", "url to prepend to each playlist entry", OFFSET(baseurl), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
900 {"hls_segment_filename", "filename template for segment files", OFFSET(segment_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
901 {"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},
902 {"hls_subtitle_path", "set path of hls subtitles", OFFSET(subtitle_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
903 {"hls_flags", "set flags affecting HLS playlist and media file generation", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0 }, 0, UINT_MAX, E, "flags"},
904 {"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"},
905 {"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"},
906 {"round_durations", "round durations in m3u8 to whole numbers", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_ROUND_DURATIONS }, 0, UINT_MAX, E, "flags"},
907 {"discont_start", "start the playlist with a discontinuity tag", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_DISCONT_START }, 0, UINT_MAX, E, "flags"},
908 {"omit_endlist", "Do not append an endlist when ending stream", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_OMIT_ENDLIST }, 0, UINT_MAX, E, "flags"},
909 {"use_localtime", "set filename expansion with strftime at segment creation", OFFSET(use_localtime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
910 {"use_localtime_mkdir", "create last directory component in strftime-generated filename", OFFSET(use_localtime_mkdir), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
911 {"method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
916 static const AVClass hls_class = {
917 .class_name = "hls muxer",
918 .item_name = av_default_item_name,
920 .version = LIBAVUTIL_VERSION_INT,
924 AVOutputFormat ff_hls_muxer = {
926 .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
927 .extensions = "m3u8",
928 .priv_data_size = sizeof(HLSContext),
929 .audio_codec = AV_CODEC_ID_AAC,
930 .video_codec = AV_CODEC_ID_H264,
931 .subtitle_codec = AV_CODEC_ID_WEBVTT,
932 .flags = AVFMT_NOFILE | AVFMT_ALLOW_FLUSH,
933 .write_header = hls_write_header,
934 .write_packet = hls_write_packet,
935 .write_trailer = hls_write_trailer,
936 .priv_class = &hls_class,