public void Run(IBackgroundTaskInstance taskInstance)
{
_settingsUtility = new SettingsUtility();
_foregroundMessenger = new ForegroundMessenger();
_smtcWrapper = new SmtcWrapper(BackgroundMediaPlayer.Current.SystemMediaTransportControls);
_playerWrapper = new PlayerWrapper(_smtcWrapper, _foregroundMessenger, _settingsUtility);
_settingsUtility.Write(ApplicationSettingsConstants.BackgroundTaskState,
BackgroundTaskState.Running);
// Send information to foreground that background task has been started if app is active
if (_playerWrapper.ForegroundAppState != AppState.Suspended)
MessageHelper.SendMessageToForeground(new BackgroundAudioTaskStartedMessage());
// This must be retrieved prior to subscribing to events below which use it
_deferral = taskInstance.GetDeferral();
// Mark the background task as started to unblock SMTC Play operation (see related WaitOne on this signal)
TaskStarted.Set();
// Associate a cancellation and completed handlers with the background task.
taskInstance.Task.Completed += TaskCompleted;
// event may raise immediately before continung thread excecution so must be at the end
taskInstance.Canceled += OnCanceled;
}
public void Run(IBackgroundTaskInstance taskInstance)
{
_settingsUtility = new SettingsUtility();
_foregroundMessenger = new ForegroundMessenger();
_smtcWrapper = new SmtcWrapper(BackgroundMediaPlayer.Current.SystemMediaTransportControls);
_playerWrapper = new PlayerWrapper(_smtcWrapper, _foregroundMessenger, _settingsUtility);
_settingsUtility.Write(ApplicationSettingsConstants.BackgroundTaskState,
BackgroundTaskState.Running);
// Send information to foreground that background task has been started if app is active
if (_playerWrapper.ForegroundAppState != AppState.Suspended)
{
MessageHelper.SendMessageToForeground(new BackgroundAudioTaskStartedMessage());
}
// This must be retrieved prior to subscribing to events below which use it
_deferral = taskInstance.GetDeferral();
// Mark the background task as started to unblock SMTC Play operation (see related WaitOne on this signal)
TaskStarted.Set();
// Associate a cancellation and completed handlers with the background task.
taskInstance.Task.Completed += TaskCompleted;
// event may raise immediately before continung thread excecution so must be at the end
taskInstance.Canceled += OnCanceled;
}
public void Dispose()
{
// save state
_settingsUtility.Write(ApplicationSettingsConstants.QueueId, CurrentQueue.Id);
_settingsUtility.Write(ApplicationSettingsConstants.Position, BackgroundMediaPlayer.Current.Position);
_settingsUtility.Write(ApplicationSettingsConstants.BackgroundTaskState, BackgroundTaskState.Canceled);
_settingsUtility.Write(ApplicationSettingsConstants.AppState, _foregroundMessenger);
UnsubscribeFromMessenger();
UnsubscribeFromSmtc();
_smtcWrapper = null;
_foregroundMessenger = null;
}
public void Dispose()
{
// save state
_settingsUtility.Write(ApplicationSettingsConstants.QueueId, CurrentQueue.Id);
_settingsUtility.Write(ApplicationSettingsConstants.Position, BackgroundMediaPlayer.Current.Position);
_settingsUtility.Write(ApplicationSettingsConstants.BackgroundTaskState, BackgroundTaskState.Canceled);
_settingsUtility.Write(ApplicationSettingsConstants.AppState, _foregroundMessenger);
UnsubscribeFromMessenger();
UnsubscribeFromSmtc();
_smtcWrapper = null;
_foregroundMessenger = null;
}
public PlayerWrapper(SmtcWrapper smtcWrapper, ForegroundMessenger foregroundMessenger,
ISettingsUtility settingsUtility)
{
_smtcWrapper = smtcWrapper;
_foregroundMessenger = foregroundMessenger;
_settingsUtility = settingsUtility;
SubscribeToMessenger();
SubscribeToSmtc();
// Add handlers for MediaPlayer
BackgroundMediaPlayer.Current.CurrentStateChanged += Current_CurrentStateChanged;
// Read persisted state of foreground app
ForegroundAppState = _settingsUtility.Read(ApplicationSettingsConstants.AppState, AppState.Unknown);
}
public PlayerWrapper(SmtcWrapper smtcWrapper, ForegroundMessenger foregroundMessenger,
ISettingsUtility settingsUtility)
{
_smtcWrapper = smtcWrapper;
_foregroundMessenger = foregroundMessenger;
_settingsUtility = settingsUtility;
SubscribeToMessenger();
SubscribeToSmtc();
// Add handlers for MediaPlayer
BackgroundMediaPlayer.Current.CurrentStateChanged += Current_CurrentStateChanged;
// Read persisted state of foreground app
ForegroundAppState = _settingsUtility.Read(ApplicationSettingsConstants.AppState, AppState.Unknown);
}
