public SinglePlaybackEventFeed(IPlaybackEventFeed parent, ushort channelId)
{
ChannelId = channelId;
// TODO(@MattWindsor91): filter these properly
ObserveIncomingCount = parent.ObserveIncomingCount;
ObserveUnknownCommand = parent.ObserveUnknownCommand;
ObservePlayerState = OnThisChannel(parent.ObservePlayerState);
ObserveMarker = OnThisChannel(parent.ObserveMarker);
ObserveTrackLoad = OnThisChannel(parent.ObserveTrackLoad);
}
/// <summary>
/// Creates an observable tracking the most recently loaded
/// non-text track.
/// <para>
/// The most recently loaded text track generally gets handled
/// in the <see cref="TextViewModel"/>.
/// </para>
/// </summary>
/// <param name="playbackEvents">
/// The events feed to adapt for the observable.
/// </param>
/// <returns>
/// An <see cref="IObservable{T}"/> that tracks the most
/// recent track sent from <paramref name="playbackEvents"/> that
/// is not a text item.
/// </returns>
private static IObservable <ITrack> NonTextLoadedTrack(IPlaybackEventFeed playbackEvents) => from x in playbackEvents.ObserveTrackLoad where !x.Track.IsTextItem select x.Track;