海康摄像头增加了云台控制等

SHH.CameraSdk/Drivers/HikVision/Features/HikPtzProvider.cs

@@ -0,0 +1,71 @@
+namespace SHH.CameraSdk.HikFeatures;
+
+public class HikPtzProvider : IPtzFeature
+{
+    private readonly IHikContext _context;
+
+    public HikPtzProvider(IHikContext context)
+    {
+        _context = context;
+    }
+
+    public async Task PtzControlAsync(PtzAction action, bool stop, int speed)
+    {
+        int userId = _context.GetUserId();
+        if (userId < 0) throw new InvalidOperationException("设备离线");
+
+        // 1. 映射指令
+        uint hikCommand = action switch
+        {
+            PtzAction.Up => HikNativeMethods.TILT_UP,
+            PtzAction.Down => HikNativeMethods.TILT_DOWN,
+            PtzAction.Left => HikNativeMethods.PAN_LEFT,
+            PtzAction.Right => HikNativeMethods.PAN_RIGHT,
+            PtzAction.ZoomIn => HikNativeMethods.ZOOM_IN,
+            PtzAction.ZoomOut => HikNativeMethods.ZOOM_OUT,
+            PtzAction.FocusNear => HikNativeMethods.FOCUS_NEAR,
+            PtzAction.FocusFar => HikNativeMethods.FOCUS_FAR,
+            PtzAction.IrisOpen => HikNativeMethods.IRIS_OPEN,
+            PtzAction.IrisClose => HikNativeMethods.IRIS_CLOSE,
+            PtzAction.Wiper => HikNativeMethods.WIPER_PWRON,
+            _ => 0
+        };
+
+        if (hikCommand == 0) return;
+
+        // 2. 转换停止标志 (海康: 0=开始, 1=停止)
+        uint dwStop = stop ? 1u : 0u;
+
+        // 3. 限制速度范围 (1-7)
+        uint dwSpeed = (uint)Math.Clamp(speed, 1, 7);
+
+        // 4. 调用 SDK
+        await Task.Run(() =>
+        {
+            // Channel 默认为 1
+            bool result = HikNativeMethods.NET_DVR_PTZControlWithSpeed_Other(userId, 1, hikCommand, dwStop, dwSpeed);
+
+            if (!result)
+            {
+                // 这里通常不抛异常，因为云台繁忙或到头是常态，记录日志即可
+                // Console.WriteLine($"PTZ Error: {HikNativeMethods.NET_DVR_GetLastError()}");
+            }
+        });
+    }
+
+    public async Task PtzStepAsync(PtzAction action, int durationMs, int speed)
+    {
+        // 1. 开始转动 (调用已有的逻辑，stop=false)
+        await PtzControlAsync(action, false, speed);
+
+        // 2. 等待指定时间 (非阻塞等待)
+        // 注意：这里使用 Task.Delay，精度对云台控制来说足够了
+        if (durationMs > 0)
+        {
+            await Task.Delay(durationMs);
+        }
+
+        // 3. 停止转动 (调用已有的逻辑，stop=true)
+        await PtzControlAsync(action, true, speed);
+    }
+}