Fix the Volume control does not work #1578

Author: emako

QuickLook.Plugin/QuickLook.Plugin.VideoViewer/ViewerPanel.xaml.cs

@@ -339,39 +339,19 @@ private void UpdateMeta(string path, MediaInfoLib info)
         }
     }
 
-    // Newer .net has Math.Clamp
-    private T Clamp<T>(T val, T min, T max) where T : IComparable<T>
-    {
-        if (val.CompareTo(min) < 0) return min;
-        else if (val.CompareTo(max) > 0) return max;
-        else return val;
-    }
-
-    // A change in amplitude by a factor of 10 corresponds to a 20 dB change
-    private const double DecibelAmplitudeMult = 20.0;
-
     public double LinearVolume
     {
-        // mediaElement.Volume returns [0,1] where 0 = -100db, 1 = 0db
-        // Decibel is logarithmic. See amplitude table https://en.wikipedia.org/wiki/Decibel
-        get
-        {
-            var dbVol = 100.0 * (mediaElement.Volume - 1.0);
-            var linearVol = Math.Pow(10, dbVol / DecibelAmplitudeMult);
-            return linearVol;
-        }
+        get => mediaElement.Volume;
         set
         {
-            var linearVol = Clamp(value, 0.00001, 1.0);
-            var dbVol = DecibelAmplitudeMult * Math.Log10(linearVol);
-            mediaElement.Volume = dbVol / 100.0 + 1.0;
+            mediaElement.Volume = value;
             OnPropertyChanged();
         }
     }
 
     private void ChangeVolume(double delta)
     {
-        LinearVolume = LinearVolume + delta; // setter will clamp
+        LinearVolume += delta;
     }
 
     private void TogglePlayPause(object sender, EventArgs e)