PlayToReceiver Classe

Definizione

public ref class PlayToReceiver sealed

/// [Windows.Foundation.Metadata.Activatable(65536, Windows.Foundation.UniversalApiContract)]
/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Standard)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
class PlayToReceiver final

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Standard)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
/// [Windows.Foundation.Metadata.Activatable(65536, "Windows.Foundation.UniversalApiContract")]
class PlayToReceiver final

[Windows.Foundation.Metadata.Activatable(65536, typeof(Windows.Foundation.UniversalApiContract))]
[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Standard)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
public sealed class PlayToReceiver

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Standard)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
[Windows.Foundation.Metadata.Activatable(65536, "Windows.Foundation.UniversalApiContract")]
public sealed class PlayToReceiver

function PlayToReceiver()

Public NotInheritable Class PlayToReceiver

Ereditarietà

Object Platform::Object IInspectable PlayToReceiver

Attributi

ActivatableAttribute ContractVersionAttribute MarshalingBehaviorAttribute ThreadingAttribute

Requisiti Windows

Commenti

È possibile usare la classe PlayToReceiver per creare un ricevitore Play To software personalizzato che sia un renderer multimediale digitale per i computer della rete. Puoi includere un oggetto PlayToReceiver nella tua app per gestire la comunicazione con i computer client Play To e quindi riprodurre o visualizzare contenuti trasmessi da tali computer usando elementi multimediali o controlli personalizzati.

I membri della classe PlayToReceiver sono costituiti dai seguenti:

• Proprietà FriendlyName che identifica il nome del ricevitore Play To quando viene annunciato in rete.
• Proprietà che identificano il tipo di supporto supportato dal ricevitore Play To: SupportsAudio, SupportsVideo, SupportsImage.
• Il metodo StartAsync che avvia il ricevitore Play To e lo annuncia in rete come renderer multimediale digitale. Il metodo StopAsync che arresta il ricevitore Play To e arresta la pubblicità sulla rete.
• Evento SourceChangeRequested che si verifica quando si riceve un flusso multimediale da un computer e gli eventi che si verificano quando viene richiesta un'azione dal computer client Play To, ad esempio una modifica del volume o una modifica nel percorso di riproduzione del supporto trasmesso: CurrentTimeChangeRequested, MuteChangeRequested, PauseRequested, PlayRequested, StopRequested, VolumeChangeRequested, TimeUpdateRequested.
• Metodi che è possibile chiamare per notificare al client Play To quando si verifica una modifica per il ricevitore Play To: NotifyDurationChange, NotifyEnded, NotifyError, NotifyLoadedMetadata, NotifyPaused, NotifyPlaying, NotifyRateChange, NotifySeeked, NotifySeeked, NotifySeeking, NotifyStopped, NotifyTimeUpdate, NotifyVolumeChange.

In Riproduci a, il video inizia dalla posizione corrente. Se vuoi avviare il video dall'inizio, cerca semplicemente l'inizio del video non appena viene stabilita la connessione Play To.

Per un esempio di creazione di un ricevitore Play To software, vedere Cast multimediale.

Windows.Media.PlayTo.PlayToReceiver receiver;
Windows.System.Display.DisplayRequest display;
Windows.UI.Core.CoreDispatcher dispatcher;
bool seeking = false;

private async void StartReceiverButton_Click(object sender, RoutedEventArgs e)
{
    try
    {
        dispatcher = Window.Current.CoreWindow.Dispatcher;

        if (receiver == null)
        {
            receiver = new Windows.Media.PlayTo.PlayToReceiver();
        }

        // Add Play To Receiver events and properties
        receiver.CurrentTimeChangeRequested += receiver_CurrentTimeChangeRequested;
        receiver.MuteChangeRequested += receiver_MuteChangeRequested;
        receiver.PauseRequested += receiver_PauseRequested;
        receiver.PlaybackRateChangeRequested += receiver_PlaybackRateChangeRequested;
        receiver.PlayRequested += receiver_PlayRequested;
        receiver.SourceChangeRequested += receiver_SourceChangeRequested;
        receiver.StopRequested += receiver_StopRequested;
        receiver.TimeUpdateRequested += receiver_TimeUpdateRequested;
        receiver.VolumeChangeRequested += receiver_VolumeChangeRequested;

        receiver.FriendlyName = "Sample Play To Receiver";
        receiver.SupportsAudio = false;
        receiver.SupportsVideo = true;
        receiver.SupportsImage = false;

        // Add MediaElement events
        VideoPlayer.CurrentStateChanged += VideoPlayer_CurrentStateChanged;
        VideoPlayer.MediaEnded += VideoPlayer_MediaEnded;
        VideoPlayer.MediaFailed += VideoPlayer_MediaFailed;
        VideoPlayer.MediaOpened += VideoPlayer_MediaOpened;
        VideoPlayer.RateChanged += VideoPlayer_RateChanged;
        VideoPlayer.SeekCompleted += VideoPlayer_SeekCompleted;
        VideoPlayer.VolumeChanged += VideoPlayer_VolumeChanged;

        // Advertise the receiver on the local network and start receiving commands
        await receiver.StartAsync();

        // Prevent the screen from locking
        if (display == null)
            display = new Windows.System.Display.DisplayRequest();
        display.RequestActive();

        StatusTextBlock.Text = "'" + receiver.FriendlyName + "' started.";
    }
    catch
    {
        receiver = null;
        StatusTextBlock.Text = "Failed to start receiver.";
    }
}

private async void StopReceiverButton_Click(object sender, RoutedEventArgs e)
{
    try
    {
        if (receiver != null)
        {
            await receiver.StopAsync();

            if (display != null)
                display.RequestRelease();

            // Remove Play To Receiver events
            receiver.CurrentTimeChangeRequested -= receiver_CurrentTimeChangeRequested;
            receiver.MuteChangeRequested -= receiver_MuteChangeRequested;
            receiver.PauseRequested -= receiver_PauseRequested;
            receiver.PlaybackRateChangeRequested -= receiver_PlaybackRateChangeRequested;
            receiver.PlayRequested -= receiver_PlayRequested;
            receiver.SourceChangeRequested -= receiver_SourceChangeRequested;
            receiver.StopRequested -= receiver_StopRequested;
            receiver.TimeUpdateRequested -= receiver_TimeUpdateRequested;
            receiver.VolumeChangeRequested -= receiver_VolumeChangeRequested;

            //  Remove MediaElement events
            VideoPlayer.Pause();

            VideoPlayer.CurrentStateChanged -= VideoPlayer_CurrentStateChanged;
            VideoPlayer.MediaEnded -= VideoPlayer_MediaEnded;
            VideoPlayer.MediaFailed -= VideoPlayer_MediaFailed;
            VideoPlayer.MediaOpened -= VideoPlayer_MediaOpened;
            VideoPlayer.RateChanged -= VideoPlayer_RateChanged;
            VideoPlayer.SeekCompleted -= VideoPlayer_SeekCompleted;
            VideoPlayer.VolumeChanged -= VideoPlayer_VolumeChanged;

            StatusTextBlock.Text = "Stopped '" + receiver.FriendlyName + "'.";
        }
    }
    catch
    {
        StatusTextBlock.Text = "Failed to stop '" + receiver.FriendlyName + "'.";
    }
}

Private receiver As Windows.Media.PlayTo.PlayToReceiver
Private display As Windows.System.Display.DisplayRequest
Private seeking As Boolean = False

Private Async Sub StartReceiverButton_Click()
    Try
        If receiver Is Nothing Then
            receiver = New Windows.Media.PlayTo.PlayToReceiver()
        End If

        ' Add Play To Receiver events and properties
        AddHandler receiver.CurrentTimeChangeRequested, AddressOf receiver_CurrentTimeChangeRequested
        AddHandler receiver.MuteChangeRequested, AddressOf receiver_MuteChangeRequested
        AddHandler receiver.PauseRequested, AddressOf receiver_PauseRequested
        AddHandler receiver.PlaybackRateChangeRequested, AddressOf receiver_PlaybackRateChangeRequested
        AddHandler receiver.PlayRequested, AddressOf receiver_PlayRequested
        AddHandler receiver.SourceChangeRequested, AddressOf receiver_SourceChangeRequested
        AddHandler receiver.StopRequested, AddressOf receiver_StopRequested
        AddHandler receiver.TimeUpdateRequested, AddressOf receiver_TimeUpdateRequested
        AddHandler receiver.VolumeChangeRequested, AddressOf receiver_VolumeChangeRequested

        receiver.FriendlyName = "Sample Play To Receiver"
        receiver.SupportsAudio = False
        receiver.SupportsVideo = True
        receiver.SupportsImage = False

        ' Add MediaElement events
        AddHandler VideoPlayer.CurrentStateChanged, AddressOf VideoPlayer_CurrentStateChanged
        AddHandler VideoPlayer.MediaEnded, AddressOf VideoPlayer_MediaEnded
        AddHandler VideoPlayer.MediaFailed, AddressOf VideoPlayer_MediaFailed
        AddHandler VideoPlayer.MediaOpened, AddressOf VideoPlayer_MediaOpened
        AddHandler VideoPlayer.RateChanged, AddressOf VideoPlayer_RateChanged
        AddHandler VideoPlayer.SeekCompleted, AddressOf VideoPlayer_SeekCompleted
        AddHandler VideoPlayer.VolumeChanged, AddressOf VideoPlayer_VolumeChanged

        ' Advertise the receiver on the local network and start receiving commands
        Await receiver.StartAsync()

        ' Prevent the screen from locking
        If display Is Nothing Then
            display = New Windows.System.Display.DisplayRequest()
            display.RequestActive()

            StatusTextBlock.Text = "'" & receiver.FriendlyName & "' started."
        End If
    Catch
        receiver = Nothing
        StatusTextBlock.Text = "Failed to start receiver. "
    End Try
End Sub

Private Async Sub StopReceiverButton_Click()
    Try
        If receiver IsNot Nothing Then
            Await receiver.StopAsync()

            If display IsNot Nothing Then display.RequestRelease()

            ' Remove Play To Receiver events
            RemoveHandler receiver.CurrentTimeChangeRequested, AddressOf receiver_CurrentTimeChangeRequested
            RemoveHandler receiver.MuteChangeRequested, AddressOf receiver_MuteChangeRequested
            RemoveHandler receiver.PauseRequested, AddressOf receiver_PauseRequested
            RemoveHandler receiver.PlaybackRateChangeRequested, AddressOf receiver_PlaybackRateChangeRequested
            RemoveHandler receiver.PlayRequested, AddressOf receiver_PlayRequested
            RemoveHandler receiver.SourceChangeRequested, AddressOf receiver_SourceChangeRequested
            RemoveHandler receiver.StopRequested, AddressOf receiver_StopRequested
            RemoveHandler receiver.TimeUpdateRequested, AddressOf receiver_TimeUpdateRequested
            RemoveHandler receiver.VolumeChangeRequested, AddressOf receiver_VolumeChangeRequested

            '  Remove MediaElement events
            VideoPlayer.Pause()

            RemoveHandler VideoPlayer.CurrentStateChanged, AddressOf VideoPlayer_CurrentStateChanged
            RemoveHandler VideoPlayer.MediaEnded, AddressOf VideoPlayer_MediaEnded
            RemoveHandler VideoPlayer.MediaFailed, AddressOf VideoPlayer_MediaFailed
            RemoveHandler VideoPlayer.MediaOpened, AddressOf VideoPlayer_MediaOpened
            RemoveHandler VideoPlayer.RateChanged, AddressOf VideoPlayer_RateChanged
            RemoveHandler VideoPlayer.SeekCompleted, AddressOf VideoPlayer_SeekCompleted
            RemoveHandler VideoPlayer.VolumeChanged, AddressOf VideoPlayer_VolumeChanged

            StatusTextBlock.Text = "Stopped '" & receiver.FriendlyName & "'."
        End If
    Catch
        StatusTextBlock.Text = "Failed to stop '" & receiver.FriendlyName & "'."
    End Try
End Sub

Le app PlayTo non verranno sospese finché il video o la musica viene riprodotta nel ricevitore Play To o le immagini vengono inviate continuamente al ricevitore Play To. Le app hanno circa 10 secondi per inviare una nuova immagine dopo la visualizzazione di quella corrente e circa 10 secondi per inviare l'audio o il video successivo dopo che quello corrente è terminato.

Costruttori

Proprietà

Metodi

Eventi

Si applica a

Vedi anche

• Esempio Play To
• Esempio di PlayToReceiver
• Esempio di Server multimediale