add frame rate setter and calc more accurate sleep duration.

Assets/uDesktopDuplication/Scripts/Lib.cs

@@ -172,6 +172,8 @@ public static class Lib
     public static extern bool HasBeenUpdated(int id);
     [DllImport("uDesktopDuplication")]
     public static extern bool UseGetPixels(int id, bool use);
+    [DllImport("uDesktopDuplication")]
+    public static extern void SetFrameRate(uint frameRate);
 
     public static string GetName(int id)
     {

Plugins/uDesktopDuplication/uDesktopDuplication/Duplicator.cpp

@@ -148,17 +148,20 @@ void Duplicator::Start()
         shouldRun_ = true;
         while (shouldRun_)
         {
-            const UINT timeout = 16 /* milliseconds */;
+            const auto frameRate = GetMonitorManager()->GetFrameRate();
+            const UINT frameMicroSeconds = 1000000 / frameRate;
+            const UINT frameMilliSeconds = 1000 / frameRate;
 
-            ScopedTimer timer([timeout] (microseconds us)
+            ScopedTimer timer([frameMicroSeconds] (microseconds us)
             {
-                const auto waitTime = milliseconds(timeout) - us;
+                const auto waitTime = microseconds(frameMicroSeconds) - us;
                 if (waitTime > microseconds::zero())
                 {
                     std::this_thread::sleep_for(waitTime);
                 }
             });
 
+            const auto timeout = static_cast<UINT>(frameMilliSeconds);
             if (!Duplicate(timeout)) break;
         }
 

Plugins/uDesktopDuplication/uDesktopDuplication/MonitorManager.cpp

@@ -168,3 +168,15 @@ int MonitorManager::GetTotalHeight() const
     const auto maxBottom = *std::max_element(bottoms.begin(), bottoms.end());
     return maxBottom - minTop;
 }
+
+
+void MonitorManager::SetFrameRate(UINT frameRate)
+{
+    frameRate_ = frameRate;
+}
+
+
+UINT MonitorManager::GetFrameRate() const
+{
+    return frameRate_;
+}

Plugins/uDesktopDuplication/uDesktopDuplication/MonitorManager.h

@@ -25,6 +25,8 @@ public:
     int GetCursorMonitorId() const { return cursorMonitorId_; }
     std::shared_ptr<Monitor> GetMonitor(int id) const;
     std::shared_ptr<Cursor> GetCursor() const;
+    void SetFrameRate(UINT frameRate);
+    UINT GetFrameRate() const;
 
 public:
     int GetMonitorCount() const;
@@ -33,7 +35,7 @@ public:
 
 private:
 	LUID unityAdapterLuid_;
-
+    UINT frameRate_ = 60;
     bool enableTextureCopyFromGpuToCpu_ = false;
     std::vector<std::shared_ptr<Monitor>> monitors_;
     std::shared_ptr<Cursor> cursor_ = std::make_shared<Cursor>();

Plugins/uDesktopDuplication/uDesktopDuplication/main.cpp

@@ -439,4 +439,10 @@ extern "C"
             return monitor->UseGetPixels(use);
         }
     }
+
+    UNITY_INTERFACE_EXPORT void UNITY_INTERFACE_API SetFrameRate(UINT frameRate)
+    {
+        if (!g_manager) return;
+        g_manager->SetFrameRate(frameRate);
+    }
 }