open source pkg v1

pkg/OpenFace/gui/OpenFaceOffline/FpsTracker.cs

@@ -0,0 +1,72 @@
+///////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2017, Carnegie Mellon University and University of Cambridge,
+// all rights reserved.
+//
+// ACADEMIC OR NON-PROFIT ORGANIZATION NONCOMMERCIAL RESEARCH USE ONLY
+//
+// BY USING OR DOWNLOADING THE SOFTWARE, YOU ARE AGREEING TO THE TERMS OF THIS LICENSE AGREEMENT.  
+// IF YOU DO NOT AGREE WITH THESE TERMS, YOU MAY NOT USE OR DOWNLOAD THE SOFTWARE.
+//
+// License can be found in OpenFace-license.txt
+
+//     * Any publications arising from the use of this software, including but
+//       not limited to academic journal and conference publications, technical
+//       reports and manuals, must cite at least one of the following works:
+//
+//       OpenFace 2.0: Facial Behavior Analysis Toolkit
+//       Tadas Baltrušaitis, Amir Zadeh, Yao Chong Lim, and Louis-Philippe Morency
+//       in IEEE International Conference on Automatic Face and Gesture Recognition, 2018  
+//
+//       Convolutional experts constrained local model for facial landmark detection.
+//       A. Zadeh, T. Baltrušaitis, and Louis-Philippe Morency,
+//       in Computer Vision and Pattern Recognition Workshops, 2017.    
+//
+//       Rendering of Eyes for Eye-Shape Registration and Gaze Estimation
+//       Erroll Wood, Tadas Baltrušaitis, Xucong Zhang, Yusuke Sugano, Peter Robinson, and Andreas Bulling 
+//       in IEEE International. Conference on Computer Vision (ICCV),  2015 
+//
+//       Cross-dataset learning and person-specific normalisation for automatic Action Unit detection
+//       Tadas Baltrušaitis, Marwa Mahmoud, and Peter Robinson 
+//       in Facial Expression Recognition and Analysis Challenge, 
+//       IEEE International Conference on Automatic Face and Gesture Recognition, 2015 
+//
+///////////////////////////////////////////////////////////////////////////////
+
+using System;
+using System.Collections.Generic;
+
+namespace OpenFaceOffline
+{
+    public class FpsTracker
+    {
+        public TimeSpan HistoryLength { get; set; }
+        public FpsTracker()
+        {
+            HistoryLength = TimeSpan.FromSeconds(2);
+        }
+
+        private Queue<DateTime> frameTimes = new Queue<DateTime>();
+
+        private void DiscardOldFrames()
+        {
+            while (frameTimes.Count > 0 && (MainWindow.CurrentTime - frameTimes.Peek()) > HistoryLength)
+                frameTimes.Dequeue();
+        }
+
+        public void AddFrame()
+        {
+            frameTimes.Enqueue(MainWindow.CurrentTime);
+            DiscardOldFrames();
+        }
+
+        public double GetFPS()
+        {
+            DiscardOldFrames();
+
+            if (frameTimes.Count == 0)
+                return 0;
+
+            return frameTimes.Count / (MainWindow.CurrentTime - frameTimes.Peek()).TotalSeconds;
+        }
+    }
+}