add thread configurer and add lock for copying to output frame

Author: Linnea May

Samples/StyleTransfer/AppModel.cs

@@ -70,8 +70,6 @@ public InputMediaType InputMedia
             }
         }
 
-
-
         // Input VideoFrame when processing images
         private VideoFrame _inputFrame;
         public VideoFrame InputFrame

Samples/StyleTransfer/AppViewModel.cs

@@ -86,6 +86,7 @@ await DispatcherHelper.RunAsync(() =>
             };
             UseGpu = false;
             _isPreviewing = false;
+            NumThreads = 5;
             NotifyUser(true);
         }
 
@@ -97,7 +98,26 @@ public AppModel AppModel
                 return _appModel;
             }
         }
-
+        private int _numThreads;
+        public int NumThreads
+        {
+            get
+            {
+                return _numThreads;
+            }
+            set
+            {
+                _numThreads = value;
+                OnPropertyChanged();
+            }
+        }
+        public int MaxThreads
+        {
+            get
+            {
+                return 10;
+            }
+        }
         private float _renderFPS;
         public float RenderFPS
         {
@@ -447,7 +467,8 @@ public async Task ChangeLiveStream()
                 VideoEffectDefinition videoEffectDefinition = new VideoEffectDefinition(StyleTransferEffectId, new PropertySet() {
                     {"ModelName", modelPath },
                     {"UseGpu", UseGpu },
-                    { "Notifier", _notifier} });
+                    { "Notifier", _notifier},
+                    { "NumThreads", NumThreads} });
                 IMediaExtension videoEffect = await _mediaCapture.AddVideoEffectAsync(videoEffectDefinition, MediaStreamType.VideoPreview);
 
                 var props = _mediaCapture.VideoDeviceController.GetMediaStreamProperties(MediaStreamType.VideoPreview) as VideoEncodingProperties;

Samples/StyleTransfer/BooleanToVisibilityConverter.cs

@@ -28,4 +28,24 @@ public object ConvertBack(object value, Type targetType, object parameter, strin
             return (value is Visibility && (Visibility)value == Visibility.Visible);
         }
     }
+    public class InvertBooleanToVisibilityConverter : IValueConverter
+    {
+        public InvertBooleanToVisibilityConverter()
+        {
+        }
+
+        public object Convert(object value, Type targetType, object parameter, string language)
+        {
+            if (value is bool && (bool)value)
+            {
+                return Visibility.Collapsed;
+            }
+            return Visibility.Visible;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, string language)
+        {
+            return (value is Visibility && (Visibility)value == Visibility.Collapsed);
+        }
+    }
 }