private void SendMessage(string constants)// SendMessage(constants,"")
{
var value = new ValueSet();
value.Add(constants, "");
BackgroundMediaPlayer.SendMessageToBackground(value);
}
/// <summary>
/// Отправляет сообщение фоновому процессу проигрывателя.
/// </summary>
/// <param name="message">Сообщение для отправки.</param>
private void SendMessageToBackground(ValueSet message)
{
if (IsTaskRunning)
{
BackgroundMediaPlayer.SendMessageToBackground(message);
}
}
/// <summary>
/// Handles background task cancellation. Task cancellation happens due to:
/// 1. Another Media app comes into foreground and starts playing music
/// 2. Resource pressure. Your task is consuming more CPU and memory than allowed.
/// In either case, save state so that if foreground app resumes it can know where to start.
/// </summary>
private void OnCanceled(IBackgroundTaskInstance sender, BackgroundTaskCancellationReason reason)
{
// You get some time here to save your state before process and resources are reclaimed
Debug.WriteLine("MyBackgroundAudioTask " + sender.Task.TaskId + " Cancel Requested...");
try
{
// immediately set not running
backgroundTaskStarted.Reset();
//save state
ApplicationSettingsHelper.SaveSettingsValue(ApplicationSettingsConstants.BackgroundTaskState, BackgroundTaskState.Canceled.ToString());
// unsubscribe event handlers
BackgroundMediaPlayer.MessageReceivedFromForeground -= BackgroundMediaPlayer_MessageReceivedFromForeground;
smtc.ButtonPressed -= smtc_ButtonPressed;
smtc.PropertyChanged -= smtc_PropertyChanged;
BackgroundMediaPlayer.Shutdown(); // shutdown media pipeline
}
catch (Exception ex)
{
Debug.WriteLine(ex.ToString());
}
deferral.Complete(); // signals task completion.
Debug.WriteLine("MyBackgroundAudioTask Cancel complete...");
}
void SendMessage(string key, string value)
{
BackgroundMediaPlayer.SendMessageToForeground(new ValueSet
{
{ key, value }
});
}
private void OnCanceled(IBackgroundTaskInstance sender, BackgroundTaskCancellationReason reason)
{
try
{
ApplicationSettingsHelper.SaveSettingsValue(SharedStrings.BACKGROUND_AUDIO_CURRENT_TRACK, Playlist.CurrentTrackName);
ApplicationSettingsHelper.SaveSettingsValue(SharedStrings.BACKGROUND_AUDIO_POSITION, BackgroundMediaPlayer.Current.Position.ToString());
ApplicationSettingsHelper.SaveSettingsValue(SharedStrings.BACKGROUND_AUDIO_STATE, SharedStrings.BACKGROUND_AUDIO_CANCELLED);
ApplicationSettingsHelper.SaveSettingsValue(SharedStrings.BACKGROUND_AUDIO_APP_STATE, Enum.GetName(typeof(ForegroundAppStatus), foregroundAppState));
backgroundTaskRunning = false;
if (transportControl != null)
{
transportControl.ButtonPressed -= transportControl_ButtonPressed;
transportControl.PropertyChanged -= transportControl_PropertyChanged;
}
Playlist.TrackChanged -= playList_TrackChanged;
playlistManager.ClearPlaylist();
playlistManager = null;
BackgroundMediaPlayer.Shutdown();
}
catch (Exception ex)
{
Debug.WriteLine("CoffeeBackgroundAudioTask.OnCanceled: " + ex.ToString());
}
if (deferral != null)
{
deferral.Complete();
deferral = null;
}
}
async private void ResetBackgroundAudio()
{
BackgroundMediaPlayer.Shutdown();
await Task.Delay(TimeSpan.FromSeconds(2));
StartBackgroundAudioTask();
}
private void StartBackgroundAudioTask()
{
AddMediaPlayerEventHandlers();
bool success = false;
IAsyncAction taskInitResult = Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
success = taskInitialized.WaitOne(2000);
if (success)
{
ValueSet message = new ValueSet();
message.Add(SharedStrings.BACKGROUND_AUDIO_START_PLAYBACK, "0");
BackgroundMediaPlayer.SendMessageToBackground(message);
status.Log(LocalizableStrings.BACKGROUND_AUDIO_TASK_INVOKED);
}
else
{
status.Log(SharedStrings.BACKGROUND_AUDIO_STARTUP_TIMEOUT);
}
});
if (success)
{
taskInitResult.Completed = new AsyncActionCompletedHandler(taskInitResult_Completed);
}
}
private void ResetAfterLostBackground()
{
BackgroundMediaPlayer.Shutdown();
_isMyBackgroundTaskRunning = false;
backgroundAudioTaskStarted.Reset();
audioPlayer.CanGoPrevious = false;
audioPlayer.CanGoNext = false;
ApplicationSettingsHelper.SaveSettingsValue(ApplicationSettingsConstants.BackgroundTaskState, BackgroundTaskState.Unknow.ToString());
audioPlayer.IsPlaying = true;
try
{
BackgroundMediaPlayer.MessageReceivedFromBackground += BackgroundMediaPlayer_MessageReceivedFromBackground;
}
catch (Exception ex)
{
if (ex.HResult == RPC_S_SERVER_UNAVAILABLE)
{
throw new Exception("Failed to get a MediaPlayer instance.");
}
else
{
throw;
}
}
}
/// <summary>
/// Handles background task cancellation. Task cancellation happens due to :
/// 1. Another Media app comes into foreground and starts playing music
/// 2. Resource pressure. Your task is consuming more CPU and memory than allowed.
/// In either case, save state so that if foreground app resumes it can know where to start.
/// </summary>
private void OnCanceled(IBackgroundTaskInstance sender, BackgroundTaskCancellationReason reason)
{
// You get some time here to save your state before process and resources are reclaimed
Debug.WriteLine("MyBackgroundAudioTask " + sender.Task.TaskId + " Cancel Requested...");
try
{
if (_queueManager != null)
{
QueueManager.TrackChanged -= playList_TrackChanged;
_queueManager = null;
}
_appSettingsHelper.Write(PlayerConstants.BackgroundTaskState,
PlayerConstants.BackgroundTaskCancelled);
_backgroundtaskrunning = false;
//unsubscribe event handlers
_systemmediatransportcontrol.ButtonPressed -= systemmediatransportcontrol_ButtonPressed;
_systemmediatransportcontrol.PropertyChanged -= systemmediatransportcontrol_PropertyChanged;
BackgroundMediaPlayer.Shutdown(); // shutdown media pipeline
}
catch (Exception ex)
{
Debug.WriteLine(ex.ToString());
}
if (_deferral != null)
{
_deferral.Complete(); // signals task completion.
Debug.WriteLine("AudioPlayer Cancel complete...");
}
}
private static void QueryForBackgroundTask()
{
ValueSet message = new ValueSet();
message.Add(Constants.BackgroundTaskQuery, null);
BackgroundMediaPlayer.SendMessageToBackground(message);
}
/// <summary>
/// Handles background task cancellation. Task cancellation happens due to:
/// 1. Another Media app comes into foreground and starts playing music
/// 2. Resource pressure. Your task is consuming more CPU and memory than allowed.
/// In either case, save state so that if foreground app resumes it can know where to start.
/// </summary>
private void OnCanceled(IBackgroundTaskInstance sender, BackgroundTaskCancellationReason reason)
{
// You get some time here to save your state before process and resources are reclaimed
Debug.WriteLine("MyBackgroundAudioTask " + sender.Task.TaskId + " Cancel Requested...");
try
{
// immediately set not running
TaskStarted.Reset();
// Dispose
_playerWrapper.Dispose();
_smtcWrapper.Dispose();
_foregroundMessenger.Dispose();
// shutdown media pipeline
BackgroundMediaPlayer.Shutdown();
}
catch (Exception ex)
{
Debug.WriteLine(ex.ToString());
}
_settingsUtility.Write(ApplicationSettingsConstants.BackgroundTaskState,
BackgroundTaskState.Canceled);
_deferral.Complete(); // signals task completion.
Debug.WriteLine("MyBackgroundAudioTask Cancel complete...");
}
public static void StopPlayback()
{
ValueSet message = new ValueSet();
message.Add(Constants.StopPlayback, null);
BackgroundMediaPlayer.SendMessageToBackground(message);
}
public static void PauseCurrentSong()
{
ValueSet message = new ValueSet();
message.Add(Constants.PauseTrack, null);
BackgroundMediaPlayer.SendMessageToBackground(message);
}
public void SendMessage(string constants, object value)
{
var message = new ValueSet();
message.Add(constants, value);
BackgroundMediaPlayer.SendMessageToBackground(message);
}
private static void SendMessageToBackground(string name, object parameter)
{
var valueSet = new ValueSet();
valueSet.Add(name, parameter);
BackgroundMediaPlayer.SendMessageToBackground(valueSet);
}
public async void PlaySong(QueueSong song)
{
if (song == null || song.Song == null)
{
CurtainPrompt.ShowError("Song seems to be empty...");
return;
}
Insights.Track(
"Play Song",
new Dictionary <string, string>
{
{ "Name", song.Song.Name },
{ "ArtistName", song.Song.ArtistName },
{ "ProviderId", song.Song.ProviderId }
});
if (_isShutdown)
{
await AddMediaPlayerEventHandlers();
}
_appSettings.Write("RadioId", null);
_appSettings.Write("RadioMode", false);
_appSettings.Write(PlayerConstants.CurrentTrack, song.Id);
var message = new ValueSet {
{ PlayerConstants.StartPlayback, null }
};
BackgroundMediaPlayer.SendMessageToBackground(message);
RaiseEvent(TrackChanged);
}
private void OnCanceled(IBackgroundTaskInstance sender, BackgroundTaskCancellationReason reason)
{
SaveText(DateTime.Now.Ticks, "Cancel", id, reason);
BackgroundMediaPlayer.Shutdown();
deferral.Complete();
}
/// <summary>
/// Called when IMediaPlayer [status changed].
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="eventArgs">The <see cref="EventArgs"/> instance containing the event data.</param>
private void OnStatusChanged(object sender, EventArgs eventArgs)
{
if (this.mediaPlayer.Status == PlayerStatus.PLAYING)
{
//ThreadPool.RunOnUIThread(
// async () =>
// {
if (BackgroundMediaPlayer.Current.CurrentState == MediaPlayerState.Paused)
{
BackgroundMediaPlayer.Current.Play();
}
else
{
//var file = this.trackMediaHelper.GetFileByMediaType(this.viewModel.CurrentTrack, TrackMediaType.AUDIO);
//this.mediaPlayer.Duration = file.Duration;
//this.viewModel.RaisePropertyChanged("Duration");
var fileUri = ""; //await this.trackMediaHelper.GetAuthenticatedUri(file);
BackgroundMediaPlayer.SendMessageToBackground(new ValueSet {
{ "SetSource", fileUri.ToString() }
});
}
// });
}
else if (this.mediaPlayer.Status == PlayerStatus.PAUSED)
{
//ThreadPool.RunOnUIThread(
// async () =>
// {
BackgroundMediaPlayer.Current.Pause();
// });
}
}
public void SendMessageToBackground(String x, String y)
{
ValueSet valueSet = new ValueSet();
valueSet.Add(x, y);
BackgroundMediaPlayer.SendMessageToBackground(valueSet);
}
private void Taskcompleted(BackgroundTaskRegistration sender, BackgroundTaskCompletedEventArgs args)
{
SaveText(DateTime.Now.Ticks, "Complete", id, sender.Name);
BackgroundMediaPlayer.Shutdown();
deferral.Complete();
}
/// <summary>
/// Handles background task cancellation. Task cancellation happens due to :
/// 1. Another Media app comes into foreground and starts playing music
/// 2. Resource pressure. Your task is consuming more CPU and memory than allowed.
/// In either case, save state so that if foreground app resumes it can know where to start.
/// </summary>
private void OnCanceled(IBackgroundTaskInstance sender, BackgroundTaskCancellationReason reason)
{
// You get some time here to save your state before process and resources are reclaimed
Debug.WriteLine("MyBackgroundAudioTask " + sender.Task.TaskId + " Cancel Requested...");
try
{
//save state
ApplicationSettingsHelper.SaveSettingsValue(Constants.CurrentTrack, Playlist.CurrentTrackName);
ApplicationSettingsHelper.SaveSettingsValue(Constants.Position, BackgroundMediaPlayer.Current.Position.ToString());
ApplicationSettingsHelper.SaveSettingsValue(Constants.BackgroundTaskState, Constants.BackgroundTaskCancelled);
ApplicationSettingsHelper.SaveSettingsValue(Constants.AppState, Enum.GetName(typeof(ForegroundAppStatus), foregroundAppState));
backgroundtaskrunning = false;
//unsubscribe event handlers
systemmediatransportcontrol.ButtonPressed -= systemmediatransportcontrol_ButtonPressed;
systemmediatransportcontrol.PropertyChanged -= systemmediatransportcontrol_PropertyChanged;
Playlist.TrackChanged -= playList_TrackChanged;
//clear objects task cancellation can happen uninterrupted
playlistManager.ClearPlaylist();
playlistManager = null;
BackgroundMediaPlayer.Shutdown(); // shutdown media pipeline
}
catch (Exception ex)
{
Debug.WriteLine(ex.ToString());
}
deferral.Complete(); // signals task completion.
Debug.WriteLine("MyBackgroundAudioTask Cancel complete...");
}
/// <summary>
/// Performs the work of a background task. The system calls this method when the associated
/// background task has been triggered.
/// </summary>
/// <param name="taskInstance">
/// An interface to an instance of the background task. The system creates this instance when the
/// task has been triggered to run.
/// </param>
public void Run(IBackgroundTaskInstance taskInstance)
{
Debug.WriteLine("Background Audio Task " + taskInstance.Task.Name + " starting");
this.systemMediaTransportControl = SystemMediaTransportControls.GetForCurrentView();
this.systemMediaTransportControl.IsEnabled = true;
this.systemMediaTransportControl.IsPauseEnabled = true;
this.systemMediaTransportControl.IsPlayEnabled = true;
this.systemMediaTransportControl.IsNextEnabled = true;
this.systemMediaTransportControl.IsPreviousEnabled = true;
// Wire up system media control events
this.systemMediaTransportControl.ButtonPressed += this.OnSystemMediaTransportControlButtonPressed;
this.systemMediaTransportControl.PropertyChanged += this.OnSystemMediaTransportControlPropertyChanged;
// Wire up background task events
taskInstance.Canceled += this.OnTaskCanceled;
taskInstance.Task.Completed += this.OnTaskcompleted;
// Initialize message channel
BackgroundMediaPlayer.MessageReceivedFromForeground += this.OnMessageReceivedFromForeground;
// Notify foreground that we have started playing
BackgroundMediaPlayer.SendMessageToForeground(new ValueSet()
{
{ "BackgroundTaskStarted", "" }
});
this.backgroundTaskStarted.Set();
this.backgroundTaskRunning = true;
this.deferral = taskInstance.GetDeferral();
}
protected override async void OnNavigatedTo(NavigationEventArgs e)
{
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility = AppViewBackButtonVisibility.Collapsed;
DisplayInformation.AutoRotationPreferences = DisplayOrientations.Portrait;
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
try
{
if (BackgroundMediaPlayer.Current.PlaybackSession.PlaybackState == MediaPlaybackState.Paused | BackgroundMediaPlayer.Current.PlaybackSession.PlaybackState == MediaPlaybackState.None)
{
(Radio.Icon as BitmapIcon).UriSource = uriMute;
}
if (BackgroundMediaPlayer.Current.PlaybackSession.PlaybackState == MediaPlaybackState.Playing)
{
(Radio.Icon as BitmapIcon).UriSource = uriSound;
}
} catch (Exception)
{
(Radio.Icon as BitmapIcon).UriSource = uriMute;
BackgroundMediaPlayer.Shutdown();
}
});
BackgroundMediaPlayer.Current.CurrentStateChanged += radioPlayer_CurrentStateChanged;
}
private void ResetAfterLostBackground()
{
BackgroundMediaPlayer.Shutdown();
_isMyBackgroundTaskRunning = false;
backgroundAudioTaskStarted.Reset();
//prevButton.IsEnabled = true;
//nextButton.IsEnabled = true;
ApplicationSettingsHelper.SaveSettingsValue(ApplicationSettingsConstants.BackgroundTaskState, BackgroundTaskState.Unknown.ToString());
Pause.Icon = new SymbolIcon(Symbol.Pause);
try
{
BackgroundMediaPlayer.MessageReceivedFromBackground += BackgroundMediaPlayer_MessageReceivedFromBackground;
}
catch (Exception ex)
{
if (ex.HResult == RPC_S_SERVER_UNAVAILABLE)
{
throw new Exception("Failed to get a MediaPlayer instance.");
}
else
{
throw;
}
}
}
private void SendMessageToBackground(PlayQueueConstantFGMessageId messageId, object value)
{
var message = new ValueSet();
message.Add(PlayQueueMessageHelper.FGMessageIdToMessageString(messageId), value);
BackgroundMediaPlayer.SendMessageToBackground(message);
}
/// <summary>
/// The background task did exist, but it has disappeared. Put the foreground back into an initial state. Unfortunately,
/// any attempts to unregister things on BackgroundMediaPlayer.Current will fail with the RPC error once the background task has been lost.
/// </summary>
private void ResetAfterLostBackground()
{
BackgroundMediaPlayer.Shutdown();
_isMyBackgroundTaskRunning = false;
backgroundAudioTaskStarted.Reset();
PreviousButtonIsEnabled = true;
NextButtonIsEnabled = true;
StopButtonVisibility = Visibility.Collapsed;
PlayButtonVisibility = Visibility.Visible;
PlayButtonIsEnabled = true;
RefreshBindings();
ApplicationSettingsHelper.SaveSettingsValue(ApplicationSettingsConstants.BackgroundTaskState, BackgroundTaskState.Unknown.ToString());
try
{
BackgroundMediaPlayer.MessageReceivedFromBackground += BackgroundMediaPlayer_MessageReceivedFromBackground;
}
catch (Exception ex)
{
if (ex.HResult == RPC_S_SERVER_UNAVAILABLE)
{
throw new Exception("Failed to get a MediaPlayer instance.");
}
else
{
throw;
}
}
}
/// <summary>
/// Sends message to background informing app has resumed
/// Subscribe to MediaPlayer events
/// </summary>
void ForegroundApp_Resuming(object sender, object e)
{
ApplicationSettingsHelper.SaveSettingsValue(Constants.AppState, Constants.ForegroundAppActive);
// Verify if the task was running before
if (IsMyBackgroundTaskRunning)
{
//if yes, reconnect to media play handlers
AddMediaPlayerEventHandlers();
//send message to background task that app is resumed, so it can start sending notifications
ValueSet messageDictionary = new ValueSet();
messageDictionary.Add(Constants.AppResumed, DateTime.Now.ToString());
BackgroundMediaPlayer.SendMessageToBackground(messageDictionary);
if (BackgroundMediaPlayer.Current.CurrentState == MediaPlayerState.Playing)
{
playButton.Content = "| |"; // Change to pause button
}
else
{
playButton.Content = ">"; // Change to play button
}
txtCurrentTrack.Text = CurrentTrack;
}
else
{
playButton.Content = ">"; // Change to play button
txtCurrentTrack.Text = "";
}
}
/// <summary>
/// The background task did exist, but it has disappeared. Put the foreground back into an initial state. Unfortunately,
/// any attempts to unregister things on BackgroundMediaPlayer.Current will fail with the RPC error once the background task has been lost.
/// </summary>
private void ResetAfterLostBackground()
{
backgroundAudioTaskStarted.Reset();
BackgroundMediaPlayer.Shutdown();
try
{
BackgroundMediaPlayer.MessageReceivedFromBackground -= BackgroundPlayerMessageReceivedFromBackground;
BackgroundMediaPlayer.MessageReceivedFromBackground += BackgroundPlayerMessageReceivedFromBackground;
}
catch (Exception ex)
{
if (ex.HResult == RPC_S_SERVER_UNAVAILABLE)
{
telemetry.TrackException(ex, new Dictionary <string, string> {
{ "Scenario", "ResetPlayerServerUnavailable" }
});
throw new Exception("Failed to get a MediaPlayer instance.");
}
else
{
throw;
}
}
}
private void HandleTaskInstanceCanceled(IBackgroundTaskInstance taskInstance, BackgroundTaskCancellationReason reason)
{
PlayQueueManager.Current.Disconnect();
TileUpdateManager.CreateTileUpdaterForApplication("App").Clear();
Logger.Current.Log(new CallerInfo(), LogLevel.Info, "AudioPlayer Background Task Completed id:{0} reason:{1}", taskInstance.Task.TaskId, reason.ToString());
ApplicationSettings.PutSettingsValue(ApplicationSettings.IS_BACKGROUND_PROCESS_ACTIVE, false);
if (ApplicationSettings.GetSettingsValue <bool>(ApplicationSettings.IS_FOREGROUND_PROCESS_ACTIVE, false))
{
PlayQueueManager.Current.SendMessageToForeground(PlayQueueConstantBGMessageId.BackgroundEnded);
}
backgroundTaskState = BackgroundTaskState.Stopped;
PlayQueueManager.Current.TrackChanged -= HandlePlayQueueTrackChanged;
BackgroundMediaPlayer.Current.CurrentStateChanged -= HandleBackgroundMediaPlayerCurrentStateChanged;
taskInstance.Task.Completed -= HandleTaskInstanceTaskCompleted;
taskInstance.Canceled -= HandleTaskInstanceCanceled;
BackgroundMediaPlayer.Shutdown();
Logger.Current.Flush();
backgroundTaskDefferal.Complete();
}
private async void ToggleSwitch_Toggled(object sender, RoutedEventArgs e)
{
ToggleSwitch toggleSwitch = sender as ToggleSwitch;
if (toggleSwitch != null)
{
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
if (toggleSwitch.IsOn)
{
if (BackgroundMediaPlayer.Current.CurrentState != MediaPlayerState.Playing)
{
var message = new ValueSet
{
{
"Play",
urlRadio
}
};
BackgroundMediaPlayer.SendMessageToBackground(message);
}
}
else
{
BackgroundMediaPlayer.Current.Pause();
}
});
}
}
public void OnActivated(BackgroundMediaPlayer mediaPlayer)
{
_codecManager = new CodecManager();
_codecManager.RegisterDefaultCodecs();
this.mediaPlayer = mediaPlayer;
smtc = mediaPlayer.SystemMediaTransportControls;
ConfigureSystemMediaTransportControls();
mediaPlayer.MediaOpened += MediaPlayer_MediaOpened;
mediaPlayer.MediaEnded += MediaPlayer_MediaEnded;
mediaPlayer.CurrentStateChanged += MediaPlayer_CurrentStateChanged;
Switch();
}
