/// <summary>
/// Begins playing the audio stroed in the supplied stream
/// </summary>
/// <returns>The async.</returns>
/// <param name="stream">Stream.</param>
/// <param name="token">Token.</param>
public async Task PlayAsync (Stream stream, IProgress<TimeSpan> monitor, CancellationToken token)
{
// Cancel the previous 'PlayAsync' call and then set up the cancellation for this invocation
var cancellation = CancellationTokenSource.CreateLinkedTokenSource (token);
previousCancellation.Cancel ();
previousCancellation = cancellation;
await previousPlayAsync.WaitOrCanceled ();
token.ThrowIfCancellationRequested ();
Reset ();
fileStream = new AudioFileStream (AudioFileType.MP3);
fileStream.PacketDecoded += AudioPacketDecoded;
fileStream.PropertyFound += AudioPropertyFound;
previousPlayAsync = BeginPlayingAsync (stream, monitor, cancellation);
await previousPlayAsync.WaitOrCanceled ();
// If the original token is cancelled we should throw a cancelled exception.
token.ThrowIfCancellationRequested ();
}