在 AiVideo 中能看到图像

增加了在线状态同步逻辑

SHH.CameraService/Interceptors/InterceptorPipeline.cs

@@ -0,0 +1,45 @@
+namespace SHH.CameraService;
+
+public class InterceptorPipeline
+{
+    private readonly IEnumerable<IProtocolInterceptor> _interceptors;
+
+    // 通过依赖注入获取所有注册的拦截器
+    public InterceptorPipeline(IEnumerable<IProtocolInterceptor> interceptors)
+    {
+        _interceptors = interceptors;
+    }
+
+    /// <summary>
+    /// 执行发送管道
+    /// </summary>
+    /// <returns>返回处理后的上下文，如果被拦截则返回 null</returns>
+    public async Task<ProtocolContext?> ExecuteSendAsync(string protocol, byte[] data)
+    {
+        var context = new ProtocolContext(protocol, data);
+
+        foreach (var interceptor in _interceptors)
+        {
+            await interceptor.OnSendingAsync(context);
+            if (context.IsBlocked) return null; // 被拦截，终止发送
+        }
+
+        return context;
+    }
+
+    /// <summary>
+    /// 执行接收管道
+    /// </summary>
+    public async Task<ProtocolContext?> ExecuteReceiveAsync(string protocol, byte[] data)
+    {
+        var context = new ProtocolContext(protocol, data);
+
+        foreach (var interceptor in _interceptors)
+        {
+            await interceptor.OnReceivedAsync(context);
+            if (context.IsBlocked) return null; // 被拦截，丢弃消息
+        }
+
+        return context;
+    }
+}

SHH.CameraService/Interceptors/ProtocolContext.cs

@@ -0,0 +1,37 @@
+namespace SHH.CameraService;
+
+/// <summary>
+/// 协议上下文 (用于在拦截器之间传递数据)
+/// </summary>
+public class ProtocolContext
+{
+    public string Protocol { get; set; }
+    public byte[] Data { get; set; }
+
+    /// <summary>
+    /// 是否拦截/终止 (设为 true 则不再继续传递)
+    /// </summary>
+    public bool IsBlocked { get; set; } = false;
+
+    public ProtocolContext(string protocol, byte[] data)
+    {
+        Protocol = protocol;
+        Data = data;
+    }
+}
+
+/// <summary>
+/// 拦截器接口
+/// </summary>
+public interface IProtocolInterceptor
+{
+    /// <summary>
+    /// 发送前触发 (Outbound)
+    /// </summary>
+    Task OnSendingAsync(ProtocolContext context);
+
+    /// <summary>
+    /// 接收后触发 (Inbound)
+    /// </summary>
+    Task OnReceivedAsync(ProtocolContext context);
+}