/// <summary>
/// Called when a new track requires audio decoding
/// (typically because it is about to start playing)
/// </summary>
/// <param name="track">
/// The track that needs audio streaming
/// </param>
/// <param name="streamer">
/// The AudioStreamer object to which a MediaStreamSource should be
/// attached to commence playback
/// </param>
/// <remarks>
/// To invoke this method for a track set the Source parameter of the AudioTrack to null
/// before setting into the Track property of the BackgroundAudioPlayer instance
/// property set to true;
/// otherwise it is assumed that the system will perform all streaming
/// and decoding
/// </remarks>
protected override void OnBeginStreaming(AudioTrack track, AudioStreamer streamer)
{
lock (AudioTrackStreamer.syncRoot)
{
AudioTrackStreamer.mss = new ShoutcastMediaStreamSource(new Uri(track.Tag));
AudioTrackStreamer.mss.MetadataChanged += new RoutedEventHandler(AudioTrackStreamer.MetadataChanged);
AudioTrackStreamer.mss.Closed += (s, e) =>
{
this.NotifyComplete();
};
streamer.SetSource(AudioTrackStreamer.mss);
}
}
/// <summary>
/// Completely shuts down the AudioTrackStreamer.
/// </summary>
public static void ShutdownMediaStreamSource()
{
if (AudioTrackStreamer.mss != null)
{
lock (AudioTrackStreamer.syncRoot)
{
if (AudioTrackStreamer.mss != null)
{
// Because of the NotifyComplete(), we need to set this BEFORE the MSS ends.
ShoutcastMediaStreamSource temp = AudioTrackStreamer.mss;
AudioTrackStreamer.mss = null;
temp.MetadataChanged -= new System.Windows.RoutedEventHandler(AudioTrackStreamer.MetadataChanged);
temp.Dispose();
}
}
}
}
