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We wait until a previous AudioTrack has been released before
creating a new one. This is currently done with a thread
block operation, which may cause ANRs in the extreme case
when someone attempts to release the player while this is
still blocked.
The problem can be avoided by just returning false from
DefaultAudioSink.handleBuffer to try again until the previous
AudioTrack is released.
Reproduction steps to force the issue:
1. Add Thread.sleep(10000); to the AudioTrack release thread.
2. Add this to the demo app:
private int positionMs = 0;
Handler handler = new Handler();
handler.post(new Runnable() {
@Override
public void run() {
player.seekTo(positionMs++);
if (positionMs == 10) {
player.release();
} else {
handler.postDelayed(this, 1000);
}
}
3. Observe Player release timeout exception.
These steps can't be easily captured in a unit test as we can't
artifically delay the AudioTrack release from the test.
Issue: google/ExoPlayer#10057
PiperOrigin-RevId: 459468912