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Add HlsSampleStreamWrapper#assertPreparationComplete

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This gives a clear way to ensure all the preparation-related @MonotonicNonNull
fields have been set to something.

PiperOrigin-RevId: 274988280
This commit is contained in:
ibaker 2019-10-16 10:25:59 +01:00 committed by Oliver Woodman
parent 03e3ceaedb
commit e63d3b4b61
1 changed files with 20 additions and 3 deletions
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23
library/hls/src/main/java/com/google/android/exoplayer2/source/hls/HlsSampleStreamWrapper.java
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@ -66,6 +66,7 @@ import java.util.List;
import java.util.Map;
import java.util.Set;
import org.checkerframework.checker.nullness.compatqual.NullableType;
import org.checkerframework.checker.nullness.qual.EnsuresNonNull;
import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
import org.checkerframework.checker.nullness.qual.RequiresNonNull;
@ -233,7 +234,6 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
*/
public void prepareWithMasterPlaylistInfo(
TrackGroup[] trackGroups, int primaryTrackGroupIndex, int... optionalTrackGroupsIndices) {
prepared = true;
this.trackGroups = createTrackGroupArrayWithDrmInfo(trackGroups);
optionalTrackGroups = new HashSet<>();
for (int optionalTrackGroupIndex : optionalTrackGroupsIndices) {
@ -241,6 +241,7 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
}
this.primaryTrackGroupIndex = primaryTrackGroupIndex;
handler.post(callback::onPrepared);
setIsPrepared();
}
public void maybeThrowPrepareError() throws IOException {
@ -251,6 +252,7 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
}
public TrackGroupArray getTrackGroups() {
assertIsPrepared();
return trackGroups;
}
@ -259,6 +261,8 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
}
public int bindSampleQueueToSampleStream(int trackGroupIndex) {
assertIsPrepared();
int sampleQueueIndex = trackGroupToSampleQueueIndex[trackGroupIndex];
if (sampleQueueIndex == C.INDEX_UNSET) {
return optionalTrackGroups.contains(trackGroups.get(trackGroupIndex))
@ -274,6 +278,7 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
}
public void unbindSampleQueue(int trackGroupIndex) {
assertIsPrepared();
int sampleQueueIndex = trackGroupToSampleQueueIndex[trackGroupIndex];
Assertions.checkState(sampleQueuesEnabledStates[sampleQueueIndex]);
sampleQueuesEnabledStates[sampleQueueIndex] = false;
@ -303,7 +308,7 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
boolean[] streamResetFlags,
long positionUs,
boolean forceReset) {
Assertions.checkState(prepared);
assertIsPrepared();
int oldEnabledTrackGroupCount = enabledTrackGroupCount;
// Deselect old tracks.
for (int i = 0; i < selections.length; i++) {
@ -1001,7 +1006,7 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
} else {
// Tracks are created using media segment information.
buildTracksFromSampleStreams();
prepared = true;
setIsPrepared();
callback.onPrepared();
}
}
@ -1173,6 +1178,18 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
return true;
}
@RequiresNonNull({"trackGroups", "optionalTrackGroups"})
private void setIsPrepared() {
prepared = true;
}
@EnsuresNonNull({"trackGroups", "optionalTrackGroups"})
private void assertIsPrepared() {
Assertions.checkState(prepared);
Assertions.checkNotNull(trackGroups);
Assertions.checkNotNull(optionalTrackGroups);
}
/**
* Scores a track type. Where multiple tracks are muxed into a container, the track with the
* highest score is the primary track.