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Remove redundant prepared flag in ProgressiveMediaPeriod

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PiperOrigin-RevId: 292892407
This commit is contained in:
kimvde 2020-02-03 12:15:33 +00:00 committed by Oliver Woodman
parent 8ac5698aac
commit 49fa6d63f9
1 changed files with 21 additions and 26 deletions
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47
library/core/src/main/java/com/google/android/exoplayer2/source/ProgressiveMediaPeriod.java
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@ -60,6 +60,7 @@ import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import org.checkerframework.checker.nullness.compatqual.NullableType;
import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
/** A {@link MediaPeriod} that extracts data using an {@link Extractor}. */
/* package */ final class ProgressiveMediaPeriod
@ -118,9 +119,8 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
private SampleQueue[] sampleQueues;
private TrackId[] sampleQueueTrackIds;
private boolean sampleQueuesBuilt;
private boolean prepared;
@Nullable private PreparedState preparedState;
private @MonotonicNonNull PreparedState preparedState;
private boolean haveAudioVideoTracks;
private int dataType;
@ -200,7 +200,7 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
}
public void release() {
if (prepared) {
if (preparedState != null) {
// Discard as much as we can synchronously. We only do this if we're prepared, since otherwise
// sampleQueues may still be being modified by the loading thread.
for (SampleQueue sampleQueue : sampleQueues) {
@ -232,14 +232,14 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
@Override
public void maybeThrowPrepareError() throws IOException {
maybeThrowError();
if (loadingFinished && !prepared) {
if (loadingFinished && preparedState == null) {
throw new ParserException("Loading finished before preparation is complete.");
}
}
@Override
public TrackGroupArray getTrackGroups() {
return getPreparedState().tracks;
return Assertions.checkNotNull(preparedState).tracks;
}
@Override
@ -249,8 +249,7 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
@NullableType SampleStream[] streams,
boolean[] streamResetFlags,
long positionUs) {
PreparedState preparedState = getPreparedState();
TrackGroupArray tracks = preparedState.tracks;
TrackGroupArray tracks = Assertions.checkNotNull(preparedState).tracks;
boolean[] trackEnabledStates = preparedState.trackEnabledStates;
int oldEnabledTrackCount = enabledTrackCount;
// Deselect old tracks.
@ -323,7 +322,7 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
if (isPendingReset()) {
return;
}
boolean[] trackEnabledStates = getPreparedState().trackEnabledStates;
boolean[] trackEnabledStates = Assertions.checkNotNull(preparedState).trackEnabledStates;
int trackCount = sampleQueues.length;
for (int i = 0; i < trackCount; i++) {
sampleQueues[i].discardTo(positionUs, toKeyframe, trackEnabledStates[i]);
@ -340,7 +339,7 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
if (loadingFinished
|| loader.hasFatalError()
|| pendingDeferredRetry
|| (prepared && enabledTrackCount == 0)) {
|| (preparedState != null && enabledTrackCount == 0)) {
return false;
}
boolean continuedLoading = loadCondition.open();
@ -377,7 +376,8 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
@Override
public long getBufferedPositionUs() {
boolean[] trackIsAudioVideoFlags = getPreparedState().trackIsAudioVideoFlags;
boolean[] trackIsAudioVideoFlags =
Assertions.checkNotNull(preparedState).trackIsAudioVideoFlags;
if (loadingFinished) {
return C.TIME_END_OF_SOURCE;
} else if (isPendingReset()) {
@ -403,8 +403,7 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
@Override
public long seekToUs(long positionUs) {
PreparedState preparedState = getPreparedState();
SeekMap seekMap = preparedState.seekMap;
SeekMap seekMap = Assertions.checkNotNull(preparedState).seekMap;
boolean[] trackIsAudioVideoFlags = preparedState.trackIsAudioVideoFlags;
// Treat all seeks into non-seekable media as being to t=0.
positionUs = seekMap.isSeekable() ? positionUs : 0;
@ -440,7 +439,7 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
@Override
public long getAdjustedSeekPositionUs(long positionUs, SeekParameters seekParameters) {
SeekMap seekMap = getPreparedState().seekMap;
SeekMap seekMap = Assertions.checkNotNull(preparedState).seekMap;
if (!seekMap.isSeekable()) {
// Treat all seeks into non-seekable media as being to t=0.
return 0;
@ -502,8 +501,8 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
}
private void maybeNotifyDownstreamFormat(int track) {
PreparedState preparedState = getPreparedState();
boolean[] trackNotifiedDownstreamFormats = preparedState.trackNotifiedDownstreamFormats;
boolean[] trackNotifiedDownstreamFormats =
Assertions.checkNotNull(preparedState).trackNotifiedDownstreamFormats;
if (!trackNotifiedDownstreamFormats[track]) {
Format trackFormat = preparedState.tracks.get(track).getFormat(/* index= */ 0);
eventDispatcher.downstreamFormatChanged(
@ -517,7 +516,8 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
}
private void maybeStartDeferredRetry(int track) {
boolean[] trackIsAudioVideoFlags = getPreparedState().trackIsAudioVideoFlags;
boolean[] trackIsAudioVideoFlags =
Assertions.checkNotNull(preparedState).trackIsAudioVideoFlags;
if (!pendingDeferredRetry
|| !trackIsAudioVideoFlags[track]
|| sampleQueues[track].isReady(/* loadingFinished= */ false)) {
@ -693,7 +693,7 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
private void maybeFinishPrepare() {
SeekMap seekMap = this.seekMap;
if (released || prepared || !sampleQueuesBuilt || seekMap == null) {
if (released || preparedState != null || !sampleQueuesBuilt || seekMap == null) {
return;
}
for (SampleQueue sampleQueue : sampleQueues) {
@ -735,15 +735,10 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
dataType = isLive ? C.DATA_TYPE_MEDIA_PROGRESSIVE_LIVE : C.DATA_TYPE_MEDIA;
preparedState =
new PreparedState(seekMap, new TrackGroupArray(trackArray), trackIsAudioVideoFlags);
prepared = true;
listener.onSourceInfoRefreshed(durationUs, seekMap.isSeekable(), isLive);
Assertions.checkNotNull(callback).onPrepared(this);
}
private PreparedState getPreparedState() {
return Assertions.checkNotNull(preparedState);
}
private void copyLengthFromLoader(ExtractingLoadable loadable) {
if (length == C.LENGTH_UNSET) {
length = loadable.length;
@ -754,8 +749,8 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
ExtractingLoadable loadable =
new ExtractingLoadable(
uri, dataSource, extractorHolder, /* extractorOutput= */ this, loadCondition);
if (prepared) {
SeekMap seekMap = getPreparedState().seekMap;
if (preparedState != null) {
SeekMap seekMap = preparedState.seekMap;
Assertions.checkState(isPendingReset());
if (durationUs != C.TIME_UNSET && pendingResetPositionUs > durationUs) {
loadingFinished = true;
@ -798,7 +793,7 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
// request data starting from the point it left off.
extractedSamplesCountAtStartOfLoad = currentExtractedSampleCount;
return true;
} else if (prepared && !suppressRead()) {
} else if (preparedState != null && !suppressRead()) {
// We're playing a stream of unknown length and duration. Assume it's live, and therefore that
// the data at the uri is a continuously shifting window of the latest available media. For
// this case there's no way to continue loading from where a previous load finished, so it's
@ -815,7 +810,7 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
// because there's no buffered data to be read. This case also covers an on-demand stream with
// unknown length that has yet to be prepared. This case cannot be disambiguated from the live
// stream case, so we have no option but to load from the start.
notifyDiscontinuity = prepared;
notifyDiscontinuity = preparedState != null;
lastSeekPositionUs = 0;
extractedSamplesCountAtStartOfLoad = 0;
for (SampleQueue sampleQueue : sampleQueues) {