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