write method

@override Future<void> write(AudioFrame frame, { AudioCancellationToken? cancellationToken, })

Writes one frame after all previously returned write futures complete.

Implementation

@override
Future<void> write(
  AudioFrame frame, {
  AudioCancellationToken? cancellationToken,
}) {
  cancellationToken?.throwIfCancelled();
  if (_writeFuture != null) {
    return Future<void>.error(
      StateError('WAV file writes must be issued sequentially.'),
    );
  }
  if (_finishFuture != null ||
      _abortRequested ||
      _abortFuture != null ||
      _status.isTerminal) {
    return Future<void>.error(
      StateError('The WAV file session no longer accepts frames.'),
    );
  }

  late final Future<void> operation;
  operation = _write(frame, cancellationToken).whenComplete(() {
    if (identical(_writeFuture, operation)) {
      _writeFuture = null;
    }
  });
  _writeFuture = operation;
  return operation;
}