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Make live HLS default start position at least 2*target duration from live edge

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Issue:#6360
PiperOrigin-RevId: 267615050
This commit is contained in:
aquilescanta 2019-09-06 17:38:30 +01:00 committed by Oliver Woodman
parent 5e8f611f06
commit 0aba89b60e
1 changed files with 12 additions and 2 deletions
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14
library/hls/src/main/java/com/google/android/exoplayer2/source/hls/HlsMediaSource.java
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@ -414,8 +414,18 @@ public final class HlsMediaSource extends BaseMediaSource
playlist.hasEndTag ? offsetFromInitialStartTimeUs + playlist.durationUs : C.TIME_UNSET;
List<HlsMediaPlaylist.Segment> segments = playlist.segments;
if (windowDefaultStartPositionUs == C.TIME_UNSET) {
windowDefaultStartPositionUs = segments.isEmpty() ? 0
: segments.get(Math.max(0, segments.size() - 3)).relativeStartTimeUs;
windowDefaultStartPositionUs = 0;
if (!segments.isEmpty()) {
int defaultStartSegmentIndex = Math.max(0, segments.size() - 3);
// We attempt to set the default start position to be at least twice the target duration
// behind the live edge.
long minStartPositionUs = playlist.durationUs - playlist.targetDurationUs * 2;
while (defaultStartSegmentIndex > 0
&& segments.get(defaultStartSegmentIndex).relativeStartTimeUs > minStartPositionUs) {
defaultStartSegmentIndex--;
}
windowDefaultStartPositionUs = segments.get(defaultStartSegmentIndex).relativeStartTimeUs;
}
}
timeline =
new SinglePeriodTimeline(