PlayToReceiver Classe

Definição

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

Herança

Object Platform::Object IInspectable PlayToReceiver

Atributos

ActivatableAttribute ContractVersionAttribute MarshalingBehaviorAttribute ThreadingAttribute

Requisitos do Windows

Comentários

Você pode usar a classe PlayToReceiver para criar um receptor play to de software personalizado que é um renderizador de mídia digital para computadores em sua rede. Você pode incluir um objeto PlayToReceiver em seu aplicativo para lidar com a comunicação com computadores cliente Play To e, em seguida, reproduzir ou exibir conteúdo transmitido desses computadores usando seus próprios elementos de mídia ou controles.

Os membros da classe PlayToReceiver consistem no seguinte:

• A propriedade FriendlyName que identifica o nome do receptor Reproduzir para quando ele é anunciado na rede.
• Propriedades que identificam o tipo de mídia compatível com o receptor Play To: SupportsAudio, SupportsVideo, SupportsImage.
• O método StartAsync que inicia o receptor Play To e o anuncia na rede como um renderizador de mídia digital. O método StopAsync que interrompe o receptor Play To e para de anunciá-lo na rede.
• O evento SourceChangeRequested que ocorre quando você recebe um fluxo de mídia de um computador e eventos que ocorrem quando uma ação é solicitada pelo computador cliente Reproduzir para, como uma alteração de volume, ou uma alteração no local de reprodução da mídia transmitida: CurrentTimeChangeRequested, MuteChangeRequested, PauseRequested, PlayRequested, StopRequested, VolumeChangeRequested, TimeUpdateRequested.
• Métodos que você pode chamar para notificar o cliente Play To quando ocorrer uma alteração para o receptor do Play To: NotifyDurationChange, NotifyEnded, NotifyError, NotifyLoadedMetadata, NotifyPaused, NotifyPlaying, NotifyRateChange, NotifySeeked, NotifySeeking, NotifyStopped, NotifyTimeUpdate, NotifyVolumeChange.

Em Reproduzir para, o vídeo começa na posição atual. Se você quiser iniciar o vídeo desde o início, basta procurar até o início do vídeo assim que a conexão Reproduzir para for estabelecida.

Para obter um exemplo de criação de um receptor play to de software, consulte Conversão de mídia.

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

Os aplicativos PlayTo não serão suspensos enquanto o vídeo ou a música estiver sendo reproduzido no receptor Reproduzir para ou as imagens forem enviadas continuamente para o receptor Reproduzir para. Os aplicativos têm aproximadamente 10 segundos para enviar uma nova imagem depois que a atual é exibida e aproximadamente 10 segundos para enviar o próximo áudio ou vídeo após o término do atual.

Construtores

Propriedades

Métodos

Eventos

Aplica-se a

Confira também

• Amostra reproduzir para
• Exemplo de PlayToReceiver
• Exemplo do Servidor de Mídia