新增 Mjpegplayer 用来播放 Web 流

SHH.MjpegPlayer/GrpcImpls/ImageProcs/ImageMonitorController.cs

@@ -0,0 +1,37 @@
+using SHH.Contracts;
+using System.Diagnostics;
+
+namespace SHH.MjpegPlayer
+{
+    /// <summary>
+    /// AI 视频流监控控制器
+    /// 职责：接收 gRpc 转换后的 Payload -> 业务转换 -> 分发 UI/AI
+    /// </summary>
+    public class ImageMonitorController
+    {
+        public static ImageMonitorController Instance { get; } = new ImageMonitorController();
+
+        private ImageMonitorController() { }
+
+        /// <summary>
+        /// 统一接收入口：由 GatewayProviderImpl.UploadVideoStream 调用
+        /// </summary>
+        public void ReceivePayload(VideoPayload payload)
+        {
+            if (payload == null) return;
+
+            // 1. 过滤 2 秒外的过期数据
+            if ((DateTimeOffset.UtcNow.ToUnixTimeMilliseconds() - payload.CaptureTimestamp) > 2000)
+                return;
+
+            try
+            {
+                ImagePayloadConverter.ToXWcfMsg(payload);
+            }
+            catch (Exception ex)
+            {
+                Debug.WriteLine($"[Controller Error] {ex.Message}");
+            }
+        }
+    }
+}