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applehttp: Use half the target duration as interval if the playlist didn't update 

This is mandated in draft-pantos-http-live-streaming-07, section
6.3.4.

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2011-12-27 13:30:55 +02:00
parent 356ae5f65b
commit 617475a95c
1 changed files with 8 additions and 3 deletions
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11
libavformat/applehttp.c
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@ -376,7 +376,6 @@ static int read_data(void *opaque, uint8_t *buf, int buf_size)
restart:
if (!v->input) {
reload:
/* If this is a live stream and the reload interval has elapsed since
* the last playlist reload, reload the variant playlists now. */
int64_t reload_interval = v->n_segments > 0 ?
@ -384,10 +383,16 @@ reload:
v->target_duration;
reload_interval *= 1000000;
reload:
if (!v->finished &&
av_gettime() - v->last_load_time >= reload_interval &&
(ret = parse_playlist(c, v->url, v, NULL)) < 0)
av_gettime() - v->last_load_time >= reload_interval) {
if ((ret = parse_playlist(c, v->url, v, NULL)) < 0)
return ret;
/* If we need to reload the playlist again below (if
* there's still no more segments), switch to a reload
* interval of half the target duration. */
reload_interval = v->target_duration * 500000;
}
if (v->cur_seq_no < v->start_seq_no) {
av_log(NULL, AV_LOG_WARNING,
"skipping %d segments ahead, expired from playlists\n",