Future<bool> start() async{
  final value = AudioIsolate().startIsolate();
  if (value == PlayerErrors.noError) {
    debugPrint('isolate started');
    return true;
  } else {
    debugPrint('isolate starting error: $value');
    return false;
  }
}

Future<SoundProps?> loadSound(String completeFileName) {
  final load = await AudioIsolate().loadFile(completeFileName);
  if (load.error != PlayerErrors.noError) return null;
  return load.sound;
}

class SoundProps {
  SoundProps(this.soundHash);

  // the [hash] returned by [loadFile]
  final int soundHash;

  /// handles of this sound. Multiple instances of this sound can be
  /// played, each with their unique handle
  List<int> handle = [];

  /// the user can listed ie when a sound ends or key events (TODO)
  StreamController<StreamSoundEvent> soundEvents = StreamController.broadcast();
}

StreamSubscription<StreamSoundEvent>? _subscription;
void listedToEndPlaying(SoundProps sound) {
  _subscription = sound!.soundEvents.stream.listen(
    (event) {
      /// Here the [event.handle] of [sound] has naturally finished
      /// and [sound.handle] doesn't contains [envent.handle] anymore.
      /// Not passing here when calling [AudioIsolate().stop()]
      /// or [AudioIsolate().stopSound()]
    },
  );
}

AudioIsolate().audioEvent.stream.listen(
  (event) {
    /// event == AudioEvent.isolateStarted
    /// or
    /// event == AudioEvent.isolateStopped
  },
);