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Fix the Volume control does not work #1578

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ema
2025-04-29 21:28:29 +08:00
parent 41fa5ed1ed
commit abc781d340
1 changed files with 3 additions and 23 deletions
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26
QuickLook.Plugin/QuickLook.Plugin.VideoViewer/ViewerPanel.xaml.cs
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@@ -339,39 +339,19 @@ public partial class ViewerPanel : UserControl, IDisposable, INotifyPropertyChan
}
}
// 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)