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),
74 typedef struct HLSContext {
75 const AVClass *class; // Class for private options.
78 int64_t start_sequence;
79 AVOutputFormat *oformat;
80 AVOutputFormat *vtt_oformat;
83 AVFormatContext *vtt_avf;
85 float time; // Set by a private option.
86 int max_nb_segments; // Set by a private option.
87 int wrap; // Set by a private option.
88 uint32_t flags; // enum HLSFlags
89 uint32_t pl_type; // enum PlaylistType
90 char *segment_filename;
92 int use_localtime; ///< flag to expand filename with localtime
93 int use_localtime_mkdir;///< flag to mkdir dirname in timebased filename
95 int64_t recording_time;
100 double duration; // last segment duration computed so far, in seconds
101 int64_t start_pos; // last segment starting position
102 int64_t size; // last segment size
104 int discontinuity_set;
106 HLSSegment *segments;
107 HLSSegment *last_segment;
108 HLSSegment *old_segments;
114 char *format_options_str;
115 char *vtt_format_options_str;
116 char *subtitle_filename;
117 AVDictionary *format_options;
120 char key_file[LINE_BUFFER_SIZE + 1];
121 char key_uri[LINE_BUFFER_SIZE + 1];
122 char key_string[KEYSIZE*2 + 1];
123 char iv_string[KEYSIZE*2 + 1];
124 AVDictionary *vtt_format_options;
130 static int hls_delete_old_segments(HLSContext *hls) {
132 HLSSegment *segment, *previous_segment = NULL;
133 float playlist_duration = 0.0f;
134 int ret = 0, path_size, sub_path_size;
135 char *dirname = NULL, *p, *sub_path;
138 segment = hls->segments;
140 playlist_duration += segment->duration;
141 segment = segment->next;
144 segment = hls->old_segments;
146 playlist_duration -= segment->duration;
147 previous_segment = segment;
148 segment = previous_segment->next;
149 if (playlist_duration <= -previous_segment->duration) {
150 previous_segment->next = NULL;
156 if (hls->segment_filename) {
157 dirname = av_strdup(hls->segment_filename);
159 dirname = av_strdup(hls->avf->filename);
162 ret = AVERROR(ENOMEM);
165 p = (char *)av_basename(dirname);
170 av_log(hls, AV_LOG_DEBUG, "deleting old segment %s\n",
172 path_size = strlen(dirname) + strlen(segment->filename) + 1;
173 path = av_malloc(path_size);
175 ret = AVERROR(ENOMEM);
179 av_strlcpy(path, dirname, path_size);
180 av_strlcat(path, segment->filename, path_size);
181 if (unlink(path) < 0) {
182 av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
183 path, strerror(errno));
186 if (segment->sub_filename[0] != '\0') {
187 sub_path_size = strlen(dirname) + strlen(segment->sub_filename) + 1;
188 sub_path = av_malloc(sub_path_size);
190 ret = AVERROR(ENOMEM);
194 av_strlcpy(sub_path, dirname, sub_path_size);
195 av_strlcat(sub_path, segment->sub_filename, sub_path_size);
196 if (unlink(sub_path) < 0) {
197 av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
198 sub_path, strerror(errno));
203 previous_segment = segment;
204 segment = previous_segment->next;
205 av_free(previous_segment);
215 static int hls_encryption_start(AVFormatContext *s)
217 HLSContext *hls = s->priv_data;
220 uint8_t key[KEYSIZE];
222 if ((ret = s->io_open(s, &pb, hls->key_info_file, AVIO_FLAG_READ, NULL)) < 0) {
223 av_log(hls, AV_LOG_ERROR,
224 "error opening key info file %s\n", hls->key_info_file);
228 ff_get_line(pb, hls->key_uri, sizeof(hls->key_uri));
229 hls->key_uri[strcspn(hls->key_uri, "\r\n")] = '\0';
231 ff_get_line(pb, hls->key_file, sizeof(hls->key_file));
232 hls->key_file[strcspn(hls->key_file, "\r\n")] = '\0';
234 ff_get_line(pb, hls->iv_string, sizeof(hls->iv_string));
235 hls->iv_string[strcspn(hls->iv_string, "\r\n")] = '\0';
237 ff_format_io_close(s, &pb);
239 if (!*hls->key_uri) {
240 av_log(hls, AV_LOG_ERROR, "no key URI specified in key info file\n");
241 return AVERROR(EINVAL);
244 if (!*hls->key_file) {
245 av_log(hls, AV_LOG_ERROR, "no key file specified in key info file\n");
246 return AVERROR(EINVAL);
249 if ((ret = s->io_open(s, &pb, hls->key_file, AVIO_FLAG_READ, NULL)) < 0) {
250 av_log(hls, AV_LOG_ERROR, "error opening key file %s\n", hls->key_file);
254 ret = avio_read(pb, key, sizeof(key));
255 ff_format_io_close(s, &pb);
256 if (ret != sizeof(key)) {
257 av_log(hls, AV_LOG_ERROR, "error reading key file %s\n", hls->key_file);
258 if (ret >= 0 || ret == AVERROR_EOF)
259 ret = AVERROR(EINVAL);
262 ff_data_to_hex(hls->key_string, key, sizeof(key), 0);
267 static int hls_mux_init(AVFormatContext *s)
269 HLSContext *hls = s->priv_data;
271 AVFormatContext *vtt_oc = NULL;
274 ret = avformat_alloc_output_context2(&hls->avf, hls->oformat, NULL, NULL);
279 oc->oformat = hls->oformat;
280 oc->interrupt_callback = s->interrupt_callback;
281 oc->max_delay = s->max_delay;
282 oc->opaque = s->opaque;
283 oc->io_open = s->io_open;
284 oc->io_close = s->io_close;
285 av_dict_copy(&oc->metadata, s->metadata, 0);
287 if(hls->vtt_oformat) {
288 ret = avformat_alloc_output_context2(&hls->vtt_avf, hls->vtt_oformat, NULL, NULL);
291 vtt_oc = hls->vtt_avf;
292 vtt_oc->oformat = hls->vtt_oformat;
293 av_dict_copy(&vtt_oc->metadata, s->metadata, 0);
296 for (i = 0; i < s->nb_streams; i++) {
298 AVFormatContext *loc;
299 if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
304 if (!(st = avformat_new_stream(loc, NULL)))
305 return AVERROR(ENOMEM);
306 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
307 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
308 st->time_base = s->streams[i]->time_base;
315 /* Create a new segment and append it to the segment list */
316 static int hls_append_segment(struct AVFormatContext *s, HLSContext *hls, double duration,
317 int64_t pos, int64_t size)
319 HLSSegment *en = av_malloc(sizeof(*en));
321 const char *pl_dir, *filename;
325 return AVERROR(ENOMEM);
327 filename = av_basename(hls->avf->filename);
329 if (hls->use_localtime_mkdir) {
330 /* Possibly prefix with mkdir'ed subdir, if playlist share same
332 tmp = av_strdup(s->filename);
335 return AVERROR(ENOMEM);
338 pl_dir = av_dirname(tmp);
339 p = hls->avf->filename;
340 if (strstr(p, pl_dir) == p)
341 filename = hls->avf->filename + strlen(pl_dir) + 1;
344 av_strlcpy(en->filename, filename, sizeof(en->filename));
346 if(hls->has_subtitle)
347 av_strlcpy(en->sub_filename, av_basename(hls->vtt_avf->filename), sizeof(en->sub_filename));
349 en->sub_filename[0] = '\0';
351 en->duration = duration;
356 if (hls->key_info_file) {
357 av_strlcpy(en->key_uri, hls->key_uri, sizeof(en->key_uri));
358 av_strlcpy(en->iv_string, hls->iv_string, sizeof(en->iv_string));
364 hls->last_segment->next = en;
366 hls->last_segment = en;
368 // EVENT or VOD playlists imply sliding window cannot be used
369 if (hls->pl_type != PLAYLIST_TYPE_NONE)
370 hls->max_nb_segments = 0;
372 if (hls->max_nb_segments && hls->nb_entries >= hls->max_nb_segments) {
374 hls->segments = en->next;
375 if (en && hls->flags & HLS_DELETE_SEGMENTS &&
376 !(hls->flags & HLS_SINGLE_FILE || hls->wrap)) {
377 en->next = hls->old_segments;
378 hls->old_segments = en;
379 if ((ret = hls_delete_old_segments(hls)) < 0)
391 static void hls_free_segments(HLSSegment *p)
402 static void set_http_options(AVDictionary **options, HLSContext *c)
405 av_dict_set(options, "method", c->method, 0);
408 static int hls_window(AVFormatContext *s, int last)
410 HLSContext *hls = s->priv_data;
412 int target_duration = 0;
414 AVIOContext *out = NULL;
415 AVIOContext *sub_out = NULL;
416 char temp_filename[1024];
417 int64_t sequence = FFMAX(hls->start_sequence, hls->sequence - hls->nb_entries);
418 int version = hls->flags & HLS_SINGLE_FILE ? 4 : 3;
419 const char *proto = avio_find_protocol_name(s->filename);
420 int use_rename = proto && !strcmp(proto, "file");
421 static unsigned warned_non_file;
422 char *key_uri = NULL;
423 char *iv_string = NULL;
424 AVDictionary *options = NULL;
426 if (!use_rename && !warned_non_file++)
427 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporarly partial files\n");
429 set_http_options(&options, hls);
430 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->filename);
431 if ((ret = s->io_open(s, &out, temp_filename, AVIO_FLAG_WRITE, &options)) < 0)
434 for (en = hls->segments; en; en = en->next) {
435 if (target_duration < en->duration)
436 target_duration = ceil(en->duration);
439 hls->discontinuity_set = 0;
440 avio_printf(out, "#EXTM3U\n");
441 avio_printf(out, "#EXT-X-VERSION:%d\n", version);
442 if (hls->allowcache == 0 || hls->allowcache == 1) {
443 avio_printf(out, "#EXT-X-ALLOW-CACHE:%s\n", hls->allowcache == 0 ? "NO" : "YES");
445 avio_printf(out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
446 avio_printf(out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
447 if (hls->pl_type == PLAYLIST_TYPE_EVENT) {
448 avio_printf(out, "#EXT-X-PLAYLIST-TYPE:EVENT\n");
449 } else if (hls->pl_type == PLAYLIST_TYPE_VOD) {
450 avio_printf(out, "#EXT-X-PLAYLIST-TYPE:VOD\n");
453 av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n",
455 if((hls->flags & HLS_DISCONT_START) && sequence==hls->start_sequence && hls->discontinuity_set==0 ){
456 avio_printf(out, "#EXT-X-DISCONTINUITY\n");
457 hls->discontinuity_set = 1;
459 for (en = hls->segments; en; en = en->next) {
460 if (hls->key_info_file && (!key_uri || strcmp(en->key_uri, key_uri) ||
461 av_strcasecmp(en->iv_string, iv_string))) {
462 avio_printf(out, "#EXT-X-KEY:METHOD=AES-128,URI=\"%s\"", en->key_uri);
464 avio_printf(out, ",IV=0x%s", en->iv_string);
465 avio_printf(out, "\n");
466 key_uri = en->key_uri;
467 iv_string = en->iv_string;
470 if (hls->flags & HLS_ROUND_DURATIONS)
471 avio_printf(out, "#EXTINF:%ld,\n", lrint(en->duration));
473 avio_printf(out, "#EXTINF:%f,\n", en->duration);
474 if (hls->flags & HLS_SINGLE_FILE)
475 avio_printf(out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
478 avio_printf(out, "%s", hls->baseurl);
479 avio_printf(out, "%s\n", en->filename);
482 if (last && (hls->flags & HLS_OMIT_ENDLIST)==0)
483 avio_printf(out, "#EXT-X-ENDLIST\n");
485 if( hls->vtt_m3u8_name ) {
486 if ((ret = s->io_open(s, &sub_out, hls->vtt_m3u8_name, AVIO_FLAG_WRITE, &options)) < 0)
488 avio_printf(sub_out, "#EXTM3U\n");
489 avio_printf(sub_out, "#EXT-X-VERSION:%d\n", version);
490 if (hls->allowcache == 0 || hls->allowcache == 1) {
491 avio_printf(sub_out, "#EXT-X-ALLOW-CACHE:%s\n", hls->allowcache == 0 ? "NO" : "YES");
493 avio_printf(sub_out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
494 avio_printf(sub_out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
496 av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n",
499 for (en = hls->segments; en; en = en->next) {
500 avio_printf(sub_out, "#EXTINF:%f,\n", en->duration);
501 if (hls->flags & HLS_SINGLE_FILE)
502 avio_printf(sub_out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
505 avio_printf(sub_out, "%s", hls->baseurl);
506 avio_printf(sub_out, "%s\n", en->sub_filename);
510 avio_printf(sub_out, "#EXT-X-ENDLIST\n");
515 av_dict_free(&options);
516 ff_format_io_close(s, &out);
517 ff_format_io_close(s, &sub_out);
518 if (ret >= 0 && use_rename)
519 ff_rename(temp_filename, s->filename, s);
523 static int hls_start(AVFormatContext *s)
525 HLSContext *c = s->priv_data;
526 AVFormatContext *oc = c->avf;
527 AVFormatContext *vtt_oc = c->vtt_avf;
528 AVDictionary *options = NULL;
529 char *filename, iv_string[KEYSIZE*2 + 1];
532 if (c->flags & HLS_SINGLE_FILE) {
533 av_strlcpy(oc->filename, c->basename,
534 sizeof(oc->filename));
536 av_strlcpy(vtt_oc->filename, c->vtt_basename,
537 sizeof(vtt_oc->filename));
539 if (c->use_localtime) {
541 struct tm *tm, tmpbuf;
543 tm = localtime_r(&now0, &tmpbuf);
544 if (!strftime(oc->filename, sizeof(oc->filename), c->basename, tm)) {
545 av_log(oc, AV_LOG_ERROR, "Could not get segment filename with use_localtime\n");
546 return AVERROR(EINVAL);
549 if (c->use_localtime_mkdir) {
551 char *fn_copy = av_strdup(oc->filename);
553 return AVERROR(ENOMEM);
555 dir = av_dirname(fn_copy);
556 if (mkdir(dir, 0777) == -1 && errno != EEXIST) {
557 av_log(oc, AV_LOG_ERROR, "Could not create directory %s with use_localtime_mkdir\n", dir);
559 return AVERROR(errno);
563 } else if (av_get_frame_filename(oc->filename, sizeof(oc->filename),
564 c->basename, c->wrap ? c->sequence % c->wrap : c->sequence) < 0) {
565 av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s' you can try use -use_localtime 1 with it\n", c->basename);
566 return AVERROR(EINVAL);
568 if( c->vtt_basename) {
569 if (av_get_frame_filename(vtt_oc->filename, sizeof(vtt_oc->filename),
570 c->vtt_basename, c->wrap ? c->sequence % c->wrap : c->sequence) < 0) {
571 av_log(vtt_oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", c->vtt_basename);
572 return AVERROR(EINVAL);
578 set_http_options(&options, c);
580 if (c->key_info_file) {
581 if ((err = hls_encryption_start(s)) < 0)
583 if ((err = av_dict_set(&options, "encryption_key", c->key_string, 0))
586 err = av_strlcpy(iv_string, c->iv_string, sizeof(iv_string));
588 snprintf(iv_string, sizeof(iv_string), "%032"PRIx64, c->sequence);
589 if ((err = av_dict_set(&options, "encryption_iv", iv_string, 0)) < 0)
592 filename = av_asprintf("crypto:%s", oc->filename);
594 err = AVERROR(ENOMEM);
597 err = s->io_open(s, &oc->pb, filename, AVIO_FLAG_WRITE, &options);
599 av_dict_free(&options);
603 if ((err = s->io_open(s, &oc->pb, oc->filename, AVIO_FLAG_WRITE, &options)) < 0)
605 if (c->vtt_basename) {
606 set_http_options(&options, c);
607 if ((err = s->io_open(s, &vtt_oc->pb, vtt_oc->filename, AVIO_FLAG_WRITE, &options)) < 0)
610 av_dict_free(&options);
612 /* We only require one PAT/PMT per segment. */
613 if (oc->oformat->priv_class && oc->priv_data) {
616 snprintf(period, sizeof(period), "%d", (INT_MAX / 2) - 1);
618 av_opt_set(oc->priv_data, "mpegts_flags", "resend_headers", 0);
619 av_opt_set(oc->priv_data, "sdt_period", period, 0);
620 av_opt_set(oc->priv_data, "pat_period", period, 0);
623 if (c->vtt_basename) {
624 err = avformat_write_header(vtt_oc,NULL);
631 av_dict_free(&options);
636 static int hls_write_header(AVFormatContext *s)
638 HLSContext *hls = s->priv_data;
641 const char *pattern = "%d.ts";
642 const char *pattern_localtime_fmt = "-%s.ts";
643 const char *vtt_pattern = "%d.vtt";
644 AVDictionary *options = NULL;
646 int vtt_basename_size;
648 hls->sequence = hls->start_sequence;
649 hls->recording_time = hls->time * AV_TIME_BASE;
650 hls->start_pts = AV_NOPTS_VALUE;
652 if (hls->format_options_str) {
653 ret = av_dict_parse_string(&hls->format_options, hls->format_options_str, "=", ":", 0);
655 av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n", hls->format_options_str);
660 for (i = 0; i < s->nb_streams; i++) {
662 s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO;
664 s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE;
667 if (hls->has_video > 1)
668 av_log(s, AV_LOG_WARNING,
669 "More than a single video stream present, "
670 "expect issues decoding it.\n");
672 hls->oformat = av_guess_format("mpegts", NULL, NULL);
675 ret = AVERROR_MUXER_NOT_FOUND;
679 if(hls->has_subtitle) {
680 hls->vtt_oformat = av_guess_format("webvtt", NULL, NULL);
682 ret = AVERROR_MUXER_NOT_FOUND;
687 if (hls->segment_filename) {
688 hls->basename = av_strdup(hls->segment_filename);
689 if (!hls->basename) {
690 ret = AVERROR(ENOMEM);
694 if (hls->flags & HLS_SINGLE_FILE)
697 if (hls->use_localtime) {
698 basename_size = strlen(s->filename) + strlen(pattern_localtime_fmt) + 1;
700 basename_size = strlen(s->filename) + strlen(pattern) + 1;
702 hls->basename = av_malloc(basename_size);
703 if (!hls->basename) {
704 ret = AVERROR(ENOMEM);
708 av_strlcpy(hls->basename, s->filename, basename_size);
710 p = strrchr(hls->basename, '.');
713 if (hls->use_localtime) {
714 av_strlcat(hls->basename, pattern_localtime_fmt, basename_size);
716 av_strlcat(hls->basename, pattern, basename_size);
720 if(hls->has_subtitle) {
722 if (hls->flags & HLS_SINGLE_FILE)
723 vtt_pattern = ".vtt";
724 vtt_basename_size = strlen(s->filename) + strlen(vtt_pattern) + 1;
725 hls->vtt_basename = av_malloc(vtt_basename_size);
726 if (!hls->vtt_basename) {
727 ret = AVERROR(ENOMEM);
730 hls->vtt_m3u8_name = av_malloc(vtt_basename_size);
731 if (!hls->vtt_m3u8_name ) {
732 ret = AVERROR(ENOMEM);
735 av_strlcpy(hls->vtt_basename, s->filename, vtt_basename_size);
736 p = strrchr(hls->vtt_basename, '.');
740 if( hls->subtitle_filename ) {
741 strcpy(hls->vtt_m3u8_name, hls->subtitle_filename);
743 strcpy(hls->vtt_m3u8_name, hls->vtt_basename);
744 av_strlcat(hls->vtt_m3u8_name, "_vtt.m3u8", vtt_basename_size);
746 av_strlcat(hls->vtt_basename, vtt_pattern, vtt_basename_size);
749 if ((ret = hls_mux_init(s)) < 0)
752 if ((ret = hls_start(s)) < 0)
755 av_dict_copy(&options, hls->format_options, 0);
756 ret = avformat_write_header(hls->avf, &options);
757 if (av_dict_count(options)) {
758 av_log(s, AV_LOG_ERROR, "Some of provided format options in '%s' are not recognized\n", hls->format_options_str);
759 ret = AVERROR(EINVAL);
762 //av_assert0(s->nb_streams == hls->avf->nb_streams);
763 for (i = 0; i < s->nb_streams; i++) {
765 AVStream *outer_st = s->streams[i];
766 if (outer_st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
767 inner_st = hls->avf->streams[i];
768 else if (hls->vtt_avf)
769 inner_st = hls->vtt_avf->streams[0];
771 /* We have a subtitle stream, when the user does not want one */
775 avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
779 av_dict_free(&options);
781 av_freep(&hls->basename);
782 av_freep(&hls->vtt_basename);
784 avformat_free_context(hls->avf);
786 avformat_free_context(hls->vtt_avf);
792 static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
794 HLSContext *hls = s->priv_data;
795 AVFormatContext *oc = NULL;
796 AVStream *st = s->streams[pkt->stream_index];
797 int64_t end_pts = hls->recording_time * hls->number;
799 int ret, can_split = 1;
800 int stream_index = 0;
802 if( st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE ) {
807 stream_index = pkt->stream_index;
809 if (hls->start_pts == AV_NOPTS_VALUE) {
810 hls->start_pts = pkt->pts;
811 hls->end_pts = pkt->pts;
814 if (hls->has_video) {
815 can_split = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
816 pkt->flags & AV_PKT_FLAG_KEY;
817 is_ref_pkt = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO;
819 if (pkt->pts == AV_NOPTS_VALUE)
820 is_ref_pkt = can_split = 0;
823 hls->duration = (double)(pkt->pts - hls->end_pts)
824 * st->time_base.num / st->time_base.den;
826 if (can_split && av_compare_ts(pkt->pts - hls->start_pts, st->time_base,
827 end_pts, AV_TIME_BASE_Q) >= 0) {
828 int64_t new_start_pos;
829 av_write_frame(oc, NULL); /* Flush any buffered data */
831 new_start_pos = avio_tell(hls->avf->pb);
832 hls->size = new_start_pos - hls->start_pos;
833 ret = hls_append_segment(s, hls, hls->duration, hls->start_pos, hls->size);
834 hls->start_pos = new_start_pos;
838 hls->end_pts = pkt->pts;
841 if (hls->flags & HLS_SINGLE_FILE) {
842 if (hls->avf->oformat->priv_class && hls->avf->priv_data)
843 av_opt_set(hls->avf->priv_data, "mpegts_flags", "resend_headers", 0);
846 ff_format_io_close(s, &oc->pb);
848 ff_format_io_close(s, &hls->vtt_avf->pb);
856 if( st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE )
861 if ((ret = hls_window(s, 0)) < 0)
865 ret = ff_write_chained(oc, stream_index, pkt, s, 0);
870 static int hls_write_trailer(struct AVFormatContext *s)
872 HLSContext *hls = s->priv_data;
873 AVFormatContext *oc = hls->avf;
874 AVFormatContext *vtt_oc = hls->vtt_avf;
876 av_write_trailer(oc);
878 hls->size = avio_tell(hls->avf->pb) - hls->start_pos;
879 ff_format_io_close(s, &oc->pb);
880 hls_append_segment(s, hls, hls->duration, hls->start_pos, hls->size);
885 av_write_trailer(vtt_oc);
886 hls->size = avio_tell(hls->vtt_avf->pb) - hls->start_pos;
887 ff_format_io_close(s, &vtt_oc->pb);
889 av_freep(&hls->basename);
890 avformat_free_context(oc);
893 av_freep(&hls->vtt_basename);
894 av_freep(&hls->vtt_m3u8_name);
895 avformat_free_context(vtt_oc);
901 hls_free_segments(hls->segments);
902 hls_free_segments(hls->old_segments);
906 #define OFFSET(x) offsetof(HLSContext, x)
907 #define E AV_OPT_FLAG_ENCODING_PARAM
908 static const AVOption options[] = {
909 {"start_number", "set first number in the sequence", OFFSET(start_sequence),AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, E},
910 {"hls_time", "set segment length in seconds", OFFSET(time), AV_OPT_TYPE_FLOAT, {.dbl = 2}, 0, FLT_MAX, E},
911 {"hls_list_size", "set maximum number of playlist entries", OFFSET(max_nb_segments), AV_OPT_TYPE_INT, {.i64 = 5}, 0, INT_MAX, E},
912 {"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},
913 {"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},
914 {"hls_wrap", "set number after which the index wraps", OFFSET(wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E},
915 {"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},
916 {"hls_base_url", "url to prepend to each playlist entry", OFFSET(baseurl), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
917 {"hls_segment_filename", "filename template for segment files", OFFSET(segment_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
918 {"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},
919 {"hls_subtitle_path", "set path of hls subtitles", OFFSET(subtitle_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
920 {"hls_flags", "set flags affecting HLS playlist and media file generation", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0 }, 0, UINT_MAX, E, "flags"},
921 {"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"},
922 {"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"},
923 {"round_durations", "round durations in m3u8 to whole numbers", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_ROUND_DURATIONS }, 0, UINT_MAX, E, "flags"},
924 {"discont_start", "start the playlist with a discontinuity tag", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_DISCONT_START }, 0, UINT_MAX, E, "flags"},
925 {"omit_endlist", "Do not append an endlist when ending stream", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_OMIT_ENDLIST }, 0, UINT_MAX, E, "flags"},
926 {"use_localtime", "set filename expansion with strftime at segment creation", OFFSET(use_localtime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
927 {"use_localtime_mkdir", "create last directory component in strftime-generated filename", OFFSET(use_localtime_mkdir), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
928 {"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" },
929 {"event", "EVENT playlist", 0, AV_OPT_TYPE_CONST, {.i64 = PLAYLIST_TYPE_EVENT }, INT_MIN, INT_MAX, E, "pl_type" },
930 {"vod", "VOD playlist", 0, AV_OPT_TYPE_CONST, {.i64 = PLAYLIST_TYPE_VOD }, INT_MIN, INT_MAX, E, "pl_type" },
931 {"method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
936 static const AVClass hls_class = {
937 .class_name = "hls muxer",
938 .item_name = av_default_item_name,
940 .version = LIBAVUTIL_VERSION_INT,
944 AVOutputFormat ff_hls_muxer = {
946 .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
947 .extensions = "m3u8",
948 .priv_data_size = sizeof(HLSContext),
949 .audio_codec = AV_CODEC_ID_AAC,
950 .video_codec = AV_CODEC_ID_H264,
951 .subtitle_codec = AV_CODEC_ID_WEBVTT,
952 .flags = AVFMT_NOFILE | AVFMT_ALLOW_FLUSH,
953 .write_header = hls_write_header,
954 .write_packet = hls_write_packet,
955 .write_trailer = hls_write_trailer,
956 .priv_class = &hls_class,