void HandleSmtcButton(MediaPlayerManager mediaPlayerManager, SystemMediaTransportControlsButton button)
{
Debug.WriteLine("BackgroundAudioRun.HandleSmtcButton() " + _id + " button " + button);
try
{
switch (button)
{
case SystemMediaTransportControlsButton.Play:
mediaPlayerManager.Play();
break;
case SystemMediaTransportControlsButton.Pause:
mediaPlayerManager.Pause();
break;
case SystemMediaTransportControlsButton.Next:
_systemMediaTransportControls.PlaybackStatus = MediaPlaybackStatus.Changing;
mediaPlayerManager.Next();
break;
case SystemMediaTransportControlsButton.Previous:
_systemMediaTransportControls.PlaybackStatus = MediaPlaybackStatus.Changing;
mediaPlayerManager.Previous();
break;
case SystemMediaTransportControlsButton.Stop:
mediaPlayerManager.Stop();
break;
}
}
catch (Exception ex)
{
Debug.WriteLine("BackgroundAudioRun.HandleSmtcButton() failed " + ex.ExtendedMessage());
}
}
void HandleSmtcButton(MediaPlayerManager mediaPlayerManager, SystemMediaTransportControlsButton button)
{
Debug.WriteLine("BackgroundAudioRun.HandleSmtcButton() " + _id + " button " + button);
try
{
switch (button)
{
case SystemMediaTransportControlsButton.Play:
mediaPlayerManager.Play();
break;
case SystemMediaTransportControlsButton.Pause:
mediaPlayerManager.Pause();
break;
case SystemMediaTransportControlsButton.Next:
_systemMediaTransportControls.PlaybackStatus = MediaPlaybackStatus.Changing;
mediaPlayerManager.Next();
break;
case SystemMediaTransportControlsButton.Previous:
_systemMediaTransportControls.PlaybackStatus = MediaPlaybackStatus.Changing;
mediaPlayerManager.Previous();
break;
case SystemMediaTransportControlsButton.Stop:
mediaPlayerManager.Stop();
break;
}
}
catch (Exception ex)
{
Debug.WriteLine("BackgroundAudioRun.HandleSmtcButton() failed " + ex.ExtendedMessage());
}
}
public async Task ExecuteAsync()
{
Debug.WriteLine("BackgroundAudioRun.ExecuteAsync()");
try
{
_systemMediaTransportControls = SystemMediaTransportControls.GetForCurrentView();
var smtc = _systemMediaTransportControls;
var isOk = false;
BackgroundMediaPlayer.MessageReceivedFromForeground += BackgroundMediaPlayerOnMessageReceivedFromForeground;
var mediaPlayer = BackgroundMediaPlayer.Current;
_metadataHandler = new MetadataHandler(_systemMediaTransportControls, _foregroundNotifier,
() => mediaPlayer.Position,
position => UpdateMediaPlayerEvents(mediaPlayer, position),
_cancellationTokenSource.Token);
try
{
mediaPlayer.CurrentStateChanged += OnCurrentStateChanged;
mediaPlayer.PlaybackMediaMarkerReached += OnPlaybackMediaMarkerReached;
BackgroundSettings.SetBackgroundId(_id);
isOk = true;
}
catch (Exception ex)
{
Debug.WriteLine("BackgroundAudioRun.ExecuteAsync() initialization failed: " + ex.ExtendedMessage());
}
MediaPlayerManager mediaPlayerManager = null;
if (isOk)
{
try
{
mediaPlayerManager = new MediaPlayerManager(mediaPlayer, _metadataHandler, _cancellationTokenSource.Token);
mediaPlayerManager.TrackChanged += MediaPlayerManagerOnTrackChanged;
mediaPlayerManager.Failed += MediaPlayerManagerOnFailed;
mediaPlayerManager.Ended += MediaPlayerManagerOnEnded;
_mediaPlayerManager = mediaPlayerManager;
smtc.ButtonPressed += SystemMediaTransportControlsOnButtonPressed;
smtc.PropertyChanged += SystemMediaTransportControlsOnPropertyChanged;
smtc.IsEnabled = true;
smtc.IsPauseEnabled = true;
smtc.IsPlayEnabled = true;
smtc.IsNextEnabled = true;
smtc.IsPreviousEnabled = true;
SyncNotification();
Debug.WriteLine("BackgroundAudioRun.ExecuteAsync() running");
await _completionSource.Task.ConfigureAwait(false);
}
catch (Exception ex)
{
Debug.WriteLine("BackgroundAudioRun.ExecuteAsync() playback failed: " + ex.ExtendedMessage());
}
}
Debug.WriteLine("BackgroundAudioRun.ExecuteAsync() done running");
BackgroundSettings.RemoveBackgroundId(_id);
try
{
_timer.Change(Timeout.InfiniteTimeSpan, Timeout.InfiniteTimeSpan);
}
catch (Exception)
{
// Guard against race with cleanup
}
_mediaPlayerManager = null;
smtc.PropertyChanged -= SystemMediaTransportControlsOnPropertyChanged;
smtc.ButtonPressed -= SystemMediaTransportControlsOnButtonPressed;
if (null != mediaPlayerManager)
{
mediaPlayerManager.TrackChanged -= MediaPlayerManagerOnTrackChanged;
mediaPlayerManager.Failed -= MediaPlayerManagerOnFailed;
mediaPlayerManager.Ended -= MediaPlayerManagerOnEnded;
await mediaPlayerManager.CloseAsync().ConfigureAwait(false);
mediaPlayerManager.Dispose();
}
if (_appId.HasValue)
{
_foregroundNotifier.Notify(BackgroundNotificationType.Stop);
}
mediaPlayer.CurrentStateChanged -= OnCurrentStateChanged;
mediaPlayer.PlaybackMediaMarkerReached -= OnPlaybackMediaMarkerReached;
BackgroundMediaPlayer.MessageReceivedFromForeground -= BackgroundMediaPlayerOnMessageReceivedFromForeground;
}
catch (Exception ex)
{
Debug.WriteLine("BackgroundAudioRun.ExecuteAsync() failed: " + ex.ExtendedMessage());
}
finally
{
Debug.WriteLine("BackgroundAudioRun.ExecuteAsync() completed");
}
}
public async Task ExecuteAsync()
{
Debug.WriteLine("BackgroundAudioRun.ExecuteAsync()");
try
{
_systemMediaTransportControls = SystemMediaTransportControls.GetForCurrentView();
var smtc = _systemMediaTransportControls;
var isOk = false;
BackgroundMediaPlayer.MessageReceivedFromForeground += BackgroundMediaPlayerOnMessageReceivedFromForeground;
var mediaPlayer = BackgroundMediaPlayer.Current;
_metadataHandler = new MetadataHandler(_systemMediaTransportControls, _foregroundNotifier,
() => mediaPlayer.Position,
position => UpdateMediaPlayerEvents(mediaPlayer, position),
_cancellationTokenSource.Token);
try
{
mediaPlayer.CurrentStateChanged += OnCurrentStateChanged;
mediaPlayer.PlaybackMediaMarkerReached += OnPlaybackMediaMarkerReached;
BackgroundSettings.SetBackgroundId(_id);
isOk = true;
}
catch (Exception ex)
{
Debug.WriteLine("BackgroundAudioRun.ExecuteAsync() initialization failed: " + ex.ExtendedMessage());
}
MediaPlayerManager mediaPlayerManager = null;
if (isOk)
{
try
{
mediaPlayerManager = new MediaPlayerManager(mediaPlayer, _metadataHandler, _cancellationTokenSource.Token);
mediaPlayerManager.TrackChanged += MediaPlayerManagerOnTrackChanged;
mediaPlayerManager.Failed += MediaPlayerManagerOnFailed;
mediaPlayerManager.Ended += MediaPlayerManagerOnEnded;
_mediaPlayerManager = mediaPlayerManager;
smtc.ButtonPressed += SystemMediaTransportControlsOnButtonPressed;
smtc.PropertyChanged += SystemMediaTransportControlsOnPropertyChanged;
smtc.IsEnabled = true;
smtc.IsPauseEnabled = true;
smtc.IsPlayEnabled = true;
smtc.IsNextEnabled = true;
smtc.IsPreviousEnabled = true;
SyncNotification();
Debug.WriteLine("BackgroundAudioRun.ExecuteAsync() running");
await _completionSource.Task.ConfigureAwait(false);
}
catch (Exception ex)
{
Debug.WriteLine("BackgroundAudioRun.ExecuteAsync() playback failed: " + ex.ExtendedMessage());
}
}
Debug.WriteLine("BackgroundAudioRun.ExecuteAsync() done running");
BackgroundSettings.RemoveBackgroundId(_id);
try
{
_timer.Change(Timeout.InfiniteTimeSpan, Timeout.InfiniteTimeSpan);
}
catch (Exception)
{
// Guard against race with cleanup
}
_mediaPlayerManager = null;
smtc.PropertyChanged -= SystemMediaTransportControlsOnPropertyChanged;
smtc.ButtonPressed -= SystemMediaTransportControlsOnButtonPressed;
if (null != mediaPlayerManager)
{
mediaPlayerManager.TrackChanged -= MediaPlayerManagerOnTrackChanged;
mediaPlayerManager.Failed -= MediaPlayerManagerOnFailed;
mediaPlayerManager.Ended -= MediaPlayerManagerOnEnded;
await mediaPlayerManager.CloseAsync().ConfigureAwait(false);
mediaPlayerManager.Dispose();
}
if (_appId.HasValue)
_foregroundNotifier.Notify(BackgroundNotificationType.Stop);
mediaPlayer.CurrentStateChanged -= OnCurrentStateChanged;
mediaPlayer.PlaybackMediaMarkerReached -= OnPlaybackMediaMarkerReached;
BackgroundMediaPlayer.MessageReceivedFromForeground -= BackgroundMediaPlayerOnMessageReceivedFromForeground;
}
catch (Exception ex)
{
Debug.WriteLine("BackgroundAudioRun.ExecuteAsync() failed: " + ex.ExtendedMessage());
}
finally
{
Debug.WriteLine("BackgroundAudioRun.ExecuteAsync() completed");
}
}
