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Align live window to available DASH segments

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PiperOrigin-RevId: 333720336
This commit is contained in:
bachinger 2020-09-25 14:20:29 +01:00 committed by kim-vde
parent c107017a4b
commit d1416aeb98
1 changed files with 29 additions and 23 deletions
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52
library/dash/src/main/java/com/google/android/exoplayer2/source/dash/DashMediaSource.java
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@ -1032,20 +1032,21 @@ public final class DashMediaSource extends BaseMediaSource {
// Update the window. // Update the window.
boolean windowChangingImplicitly = false; boolean windowChangingImplicitly = false;
int lastPeriodIndex = manifest.getPeriodCount() - 1; int lastPeriodIndex = manifest.getPeriodCount() - 1;
PeriodSeekInfo firstPeriodSeekInfo = PeriodSeekInfo.createPeriodSeekInfo(manifest.getPeriod(0), Period lastPeriod = manifest.getPeriod(lastPeriodIndex);
manifest.getPeriodDurationUs(0)); long lastPeriodDurationUs = manifest.getPeriodDurationUs(lastPeriodIndex);
PeriodSeekInfo lastPeriodSeekInfo = PeriodSeekInfo.createPeriodSeekInfo( long nowUnixTimeUs = C.msToUs(Util.getNowUnixTimeMs(elapsedRealtimeOffsetMs));
manifest.getPeriod(lastPeriodIndex), manifest.getPeriodDurationUs(lastPeriodIndex)); PeriodSeekInfo firstPeriodSeekInfo =
PeriodSeekInfo.createPeriodSeekInfo(
manifest.getPeriod(0), manifest.getPeriodDurationUs(0), nowUnixTimeUs);
PeriodSeekInfo lastPeriodSeekInfo =
PeriodSeekInfo.createPeriodSeekInfo(lastPeriod, lastPeriodDurationUs, nowUnixTimeUs);
// Get the period-relative start/end times. // Get the period-relative start/end times.
long currentStartTimeUs = firstPeriodSeekInfo.availableStartTimeUs; long currentStartTimeUs = firstPeriodSeekInfo.availableStartTimeUs;
long currentEndTimeUs = lastPeriodSeekInfo.availableEndTimeUs; long currentEndTimeUs = lastPeriodSeekInfo.availableEndTimeUs;
if (manifest.dynamic && !lastPeriodSeekInfo.isIndexExplicit) { if (manifest.dynamic && !lastPeriodSeekInfo.isIndexExplicit) {
// The manifest describes an incomplete live stream. Update the start/end times to reflect the // The manifest describes an incomplete live stream. Update the start/end times to reflect the
// live stream duration and the manifest's time shift buffer depth. // live stream duration and the manifest's time shift buffer depth.
long nowUnixTimeUs = C.msToUs(Util.getNowUnixTimeMs(elapsedRealtimeOffsetMs)); long liveStreamEndPositionInLastPeriodUs = currentEndTimeUs - C.msToUs(lastPeriod.startMs);
long liveStreamDurationUs = nowUnixTimeUs - C.msToUs(manifest.availabilityStartTimeMs);
long liveStreamEndPositionInLastPeriodUs = liveStreamDurationUs
- C.msToUs(manifest.getPeriod(lastPeriodIndex).startMs);
currentEndTimeUs = min(liveStreamEndPositionInLastPeriodUs, currentEndTimeUs); currentEndTimeUs = min(liveStreamEndPositionInLastPeriodUs, currentEndTimeUs);
if (manifest.timeShiftBufferDepthMs != C.TIME_UNSET) { if (manifest.timeShiftBufferDepthMs != C.TIME_UNSET) {
long timeShiftBufferDepthUs = C.msToUs(manifest.timeShiftBufferDepthMs); long timeShiftBufferDepthUs = C.msToUs(manifest.timeShiftBufferDepthMs);
@ -1098,7 +1099,7 @@ public final class DashMediaSource extends BaseMediaSource {
windowStartTimeMs, windowStartTimeMs,
elapsedRealtimeOffsetMs, elapsedRealtimeOffsetMs,
firstPeriodId, firstPeriodId,
currentStartTimeUs, /* offsetInFirstPeriodUs= */ currentStartTimeUs,
windowDurationUs, windowDurationUs,
windowDefaultStartPositionUs, windowDefaultStartPositionUs,
manifest, manifest,
@ -1207,7 +1208,7 @@ public final class DashMediaSource extends BaseMediaSource {
private static final class PeriodSeekInfo { private static final class PeriodSeekInfo {
public static PeriodSeekInfo createPeriodSeekInfo( public static PeriodSeekInfo createPeriodSeekInfo(
com.google.android.exoplayer2.source.dash.manifest.Period period, long durationUs) { Period period, long periodDurationUs, long nowUnixTimeUs) {
int adaptationSetCount = period.adaptationSets.size(); int adaptationSetCount = period.adaptationSets.size();
long availableStartTimeUs = 0; long availableStartTimeUs = 0;
long availableEndTimeUs = Long.MAX_VALUE; long availableEndTimeUs = Long.MAX_VALUE;
@ -1225,32 +1226,37 @@ public final class DashMediaSource extends BaseMediaSource {
for (int i = 0; i < adaptationSetCount; i++) { for (int i = 0; i < adaptationSetCount; i++) {
AdaptationSet adaptationSet = period.adaptationSets.get(i); AdaptationSet adaptationSet = period.adaptationSets.get(i);
List<Representation> representations = adaptationSet.representations;
// Exclude text adaptation sets from duration calculations, if we have at least one audio // Exclude text adaptation sets from duration calculations, if we have at least one audio
// or video adaptation set. See: https://github.com/google/ExoPlayer/issues/4029 // or video adaptation set. See: https://github.com/google/ExoPlayer/issues/4029
if (haveAudioVideoAdaptationSets && adaptationSet.type == C.TRACK_TYPE_TEXT) { if ((haveAudioVideoAdaptationSets && adaptationSet.type == C.TRACK_TYPE_TEXT)
|| representations.isEmpty()) {
continue; continue;
} }
DashSegmentIndex index = adaptationSet.representations.get(0).getIndex(); @Nullable DashSegmentIndex index = representations.get(0).getIndex();
if (index == null) { if (index == null) {
return new PeriodSeekInfo(true, 0, durationUs); return new PeriodSeekInfo(
/* isIndexExplicit= */ true,
/* availableStartTimeUs= */ 0,
/* availableEndTimeUs= */ periodDurationUs);
} }
isIndexExplicit |= index.isExplicit(); isIndexExplicit |= index.isExplicit();
int segmentCount = index.getSegmentCount(durationUs); int availableSegmentCount = index.getAvailableSegmentCount(periodDurationUs, nowUnixTimeUs);
if (segmentCount == 0) { if (availableSegmentCount == 0) {
seenEmptyIndex = true; seenEmptyIndex = true;
availableStartTimeUs = 0; availableStartTimeUs = 0;
availableEndTimeUs = 0; availableEndTimeUs = 0;
} else if (!seenEmptyIndex) { } else if (!seenEmptyIndex) {
long firstSegmentNum = index.getFirstSegmentNum(); long firstAvailableSegmentNum =
long adaptationSetAvailableStartTimeUs = index.getTimeUs(firstSegmentNum); index.getFirstAvailableSegmentNum(periodDurationUs, nowUnixTimeUs);
long adaptationSetAvailableStartTimeUs = index.getTimeUs(firstAvailableSegmentNum);
availableStartTimeUs = max(availableStartTimeUs, adaptationSetAvailableStartTimeUs); availableStartTimeUs = max(availableStartTimeUs, adaptationSetAvailableStartTimeUs);
if (segmentCount != DashSegmentIndex.INDEX_UNBOUNDED) { long lastAvailableSegmentNum = firstAvailableSegmentNum + availableSegmentCount - 1;
long lastSegmentNum = firstSegmentNum + segmentCount - 1; long adaptationSetAvailableEndTimeUs =
long adaptationSetAvailableEndTimeUs = index.getTimeUs(lastSegmentNum) index.getTimeUs(lastAvailableSegmentNum)
+ index.getDurationUs(lastSegmentNum, durationUs); + index.getDurationUs(lastAvailableSegmentNum, periodDurationUs);
availableEndTimeUs = min(availableEndTimeUs, adaptationSetAvailableEndTimeUs); availableEndTimeUs = min(availableEndTimeUs, adaptationSetAvailableEndTimeUs);
}
} }
} }
return new PeriodSeekInfo(isIndexExplicit, availableStartTimeUs, availableEndTimeUs); return new PeriodSeekInfo(isIndexExplicit, availableStartTimeUs, availableEndTimeUs);