添加契约和网络传输类库

SHH.CameraService/ZeroMqBridgeService.cs

@@ -0,0 +1,75 @@
+using Microsoft.Extensions.Hosting;
+using OpenCvSharp;
+using SHH.Contracts;
+using SHH.NetMQ;
+
+namespace SHH.CameraSdk
+{
+    public class ZeroMqBridgeService : BackgroundService
+    {
+        private readonly DistributorServer _distributor;
+        private readonly ForwarderClient _forwarder;
+
+        public ZeroMqBridgeService(DistributorServer distributor, ForwarderClient forwarder)
+        {
+            _distributor = distributor;
+            _forwarder = forwarder;
+        }
+
+        protected override Task ExecuteAsync(CancellationToken stoppingToken)
+        {
+            Console.WriteLine("[Bridge] 正在连接全局广播总线...");
+
+            // 【关键修改】直接订阅静态的全局事件
+            // 不需要传入 APP_ID，因为这是 C# 原生事件，不是字典查找
+            GlobalStreamDispatcher.OnGlobalFrame += BridgeHandler;
+
+            Console.WriteLine("[Bridge] 全局总线连接成功！任何动态增删的设备都会自动转发。");
+            return Task.CompletedTask;
+        }
+
+        // 真正的事件处理函数
+        private void BridgeHandler(long deviceId, SmartFrame frame)
+        {
+            try
+            {
+                // 1. 安全检查
+                var sourceMat = frame.TargetMat ?? frame.InternalMat;
+                if (sourceMat == null || sourceMat.Empty()) return;
+
+                // 2. 内存克隆 (Deep Copy) - 这一步不能省
+                using var safeMat = sourceMat.Clone();
+
+                // 3. 编码 & 封装
+                // 建议：可以在这里判断一下 deviceId，如果某些设备不想发，可以在这里 return
+                var jpgParams = new int[] { (int)ImwriteFlags.JpegQuality, 70 };
+                byte[] jpgBytes = safeMat.ImEncode(".jpg", jpgParams);
+
+                var payload = new VideoPayload
+                {
+                    CameraId = deviceId.ToString(),
+                    CaptureTime = DateTime.Now,
+                    DispatchTime = DateTime.Now,
+                    OriginalWidth = safeMat.Width,
+                    OriginalHeight = safeMat.Height,
+                    OriginalImageBytes = jpgBytes
+                };
+
+                // 4. 发射
+                _distributor.Broadcast(payload);
+                _forwarder.Push(payload);
+            }
+            catch (Exception ex)
+            {
+                // Console.WriteLine(ex.Message); // 生产环境建议注释掉，防止日志刷屏
+            }
+        }
+
+        public override Task StopAsync(CancellationToken cancellationToken)
+        {
+            // 优雅退订，防止内存泄漏
+            GlobalStreamDispatcher.OnGlobalFrame -= BridgeHandler;
+            return base.StopAsync(cancellationToken);
+        }
+    }
+}