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Original file line number Diff line number Diff line change
Expand Up @@ -96,13 +96,16 @@ public void releaseTrack(@NonNull TrackType type) {

@Override
public boolean isInitialized() {
return mSource.isInitialized();
return mSource != null && mSource.isInitialized();
}

@Override
public void initialize() {
// Make it easier for subclasses to put their logic in initialize safely.
if (!mSource.isInitialized()) {
if (!isInitialized()) {
if (mSource == null) {
throw new NullPointerException("DataSourceWrapper's source is not set!");
}
mSource.initialize();
}
}
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