MediaSourceAppServiceConnection.InitializeMediaStreamSourceRequested 事件

定義

命名空間:

Windows.Media.Core

由系統引發，以要求新 MediaStreamSource的初始化。

// Register
event_token InitializeMediaStreamSourceRequested(TypedEventHandler<MediaSourceAppServiceConnection, InitializeMediaStreamSourceRequestedEventArgs const&> const& handler) const;

// Revoke with event_token
void InitializeMediaStreamSourceRequested(event_token const* cookie) const;

// Revoke with event_revoker
MediaSourceAppServiceConnection::InitializeMediaStreamSourceRequested_revoker InitializeMediaStreamSourceRequested(auto_revoke_t, TypedEventHandler<MediaSourceAppServiceConnection, InitializeMediaStreamSourceRequestedEventArgs const&> const& handler) const;

public event TypedEventHandler<MediaSourceAppServiceConnection,InitializeMediaStreamSourceRequestedEventArgs> InitializeMediaStreamSourceRequested;

function onInitializeMediaStreamSourceRequested(eventArgs) { /* Your code */ }
mediaSourceAppServiceConnection.addEventListener("initializemediastreamsourcerequested", onInitializeMediaStreamSourceRequested);
mediaSourceAppServiceConnection.removeEventListener("initializemediastreamsourcerequested", onInitializeMediaStreamSourceRequested);
- or -
mediaSourceAppServiceConnection.oninitializemediastreamsourcerequested = onInitializeMediaStreamSourceRequested;

Public Custom Event InitializeMediaStreamSourceRequested As TypedEventHandler(Of MediaSourceAppServiceConnection, InitializeMediaStreamSourceRequestedEventArgs) 

事件類型

TypedEventHandler<MediaSourceAppServiceConnection,InitializeMediaStreamSourceRequestedEventArgs>

備註

註冊 InitializeMediaStreamSourceRequestedEventArgs的處理常式之後，呼叫 Start 以通知系統 App Service 已準備好處理要求。

使用 InitializeMediaStreamSourceRequestedEventArgs 物件時，系統會將 IRandomAccessStream 和未初始化的 MediaStreamSource 物件傳遞至 InitializeMediaStreamSourceRequested 事件處理常式。 應用程式服務應該剖析 IRandomAccessStream ，以建立 IMediaStreamDescriptor。 如果支援要求的資料流程格式，則 App Service 可以初始化 MediaStreamSource 並開始提供範例。