降低CPU使用率，处置好因降低CPU使用率带来的颜色偏差

SHH.CameraSdk/Drivers/HikVision/HikPlayMethods.cs

@@ -341,11 +341,18 @@ public static class HikPlayMethods
     [DllImport(DllName)]
     public static extern bool PlayM4_ResetSourceBuffer(int nPort);
 
+    // =========================================================================
+    // 🚀 [修正] 适配 V6.1.9+ 新版 SDK 的硬解码 API
+    // =========================================================================
     /// <summary>
-    /// [新增] 开启硬件解码
+    /// 设置解码引擎 (扩展版)
+    /// 对应 C++: BOOL PlayM4_SetDecodeEngineEx(LONG nPort, DWORD dwEngine);
     /// </summary>
-    [DllImport(DllName)]
-    public static extern bool PlayM4_SetHardWareDecode(int nPort, int nMode);
+    /// <param name="nPort">通道号</param>
+    /// <param name="dwEngine">0:软解, 1:显卡硬解(D3D9), 2:显卡硬解(D3D11), 3:Intel核显</param>
+    /// <returns></returns>
+    [DllImport("PlayCtrl.dll")]
+    public static extern bool PlayM4_SetDecodeEngineEx(int nPort, uint dwEngine);
 
     #endregion
 }