新增 Mjpegplayer 用来播放 Web 流

SHH.MjpegPlayer/Core/PrismMsg.cs

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+using Prism.Events;
+
+namespace SHH.MjpegPlayer;
+
+/// <summary>Prism 消息框架</summary>
+public class PrismMsg<T>
+{
+    #region Defines
+
+    public IEventAggregator _ea;
+
+    private static PrismMsg<T>? _instance = null;
+
+    #endregion
+
+    #region Constructor
+
+    /// <summary>构造函数</summary>
+    private PrismMsg()
+    {
+        _ea = new EventAggregator();
+    }
+
+    #endregion
+
+    #region Instance
+
+    /// <summary>获取实例信息</summary>
+    public static PrismMsg<T> Instance
+    {
+        get
+        {
+            if (_instance == null)
+                _instance = new PrismMsg<T>();
+
+            return _instance;
+        }
+    }
+
+    #endregion
+
+    #region Publish
+
+    /// <summary>发送消息</summary>
+    public static void Publish(T msg)
+    {
+        if (Instance == null)
+            return;
+
+        dynamic? data = msg;
+        Instance._ea.GetEvent<PubSubEvent<T>>().Publish(data);
+    }
+
+    #endregion
+
+    #region Subscribe
+
+    /// <summary>订阅消息</summary>
+    public static void Subscribe(Action<T> method)
+    {
+        if (Instance == null || Instance._ea == null)
+            return;
+
+        Instance._ea.GetEvent<PubSubEvent<T>>().Subscribe(method);
+    }
+
+    #endregion
+}