Fixing an issue with rounding causing certain volume levels to not show the same on the steam deck as they did in the volume mixer

src/FocusVolumeControl/AudioSessions/ActiveAudioSessionWrapper.cs

@@ -65,18 +65,14 @@ public class ActiveAudioSessionWrapper : IAudioSession
 	{
 		//if you have more than one volume. they will all get set based on the first volume control
 		var level = Volume.FirstOrDefault()?.MasterVolume ?? 0;
-
+		level = VolumeHelpers.GetAdjustedVolume(level, step, ticks);
-		level += (0.01f * step) * ticks;
-		level = Math.Max(level, 0);
-		level = Math.Min(level, 1);
-
 		Volume.ForEach(x => x.MasterVolume = level);
 	}
 
 	public int GetVolumeLevel()
 	{
 		var level = Volume.FirstOrDefault()?.MasterVolume ?? 0;
-		return (int)(level * 100);
+		return VolumeHelpers.GetVolumePercentage(level);
 	}
 
 }

src/FocusVolumeControl/AudioSessions/SystemSoundsAudioSession.cs

@@ -24,15 +24,10 @@ internal class SystemSoundsAudioSession : IAudioSession
 
 	public void IncrementVolumeLevel(int step, int ticks)
 	{
-		var level = _volumeControl.MasterVolume;
+		var level = VolumeHelpers.GetAdjustedVolume(_volumeControl.MasterVolume, step, ticks);
-
-		level += (0.01f * step) * ticks;
-		level = Math.Max(level, 0);
-		level = Math.Min(level, 1);
-
 		_volumeControl.MasterVolume = level;
 	}
 
-	public int GetVolumeLevel() => (int)(_volumeControl.MasterVolume * 100);
+	public int GetVolumeLevel() => VolumeHelpers.GetVolumePercentage(_volumeControl.MasterVolume);
 
 }

src/FocusVolumeControl/AudioSessions/SystemVolumeAudioSession.cs

@@ -24,15 +24,10 @@ internal class SystemVolumeAudioSession : IAudioSession
 
 	public void IncrementVolumeLevel(int step, int ticks)
 	{
-		var level = _volumeControl.MasterVolumeLevelScalar;
+		var level = VolumeHelpers.GetAdjustedVolume(_volumeControl.MasterVolumeLevelScalar, step, ticks);
-
-		level += (0.01f * step) * ticks;
-		level = Math.Max(level, 0);
-		level = Math.Min(level, 1);
-
 		_volumeControl.MasterVolumeLevelScalar = level;
 	}
 
-	public int GetVolumeLevel() => (int)(_volumeControl.MasterVolumeLevelScalar * 100);
+	public int GetVolumeLevel() => VolumeHelpers.GetVolumePercentage(_volumeControl.MasterVolumeLevelScalar);
 
 }

src/FocusVolumeControl/AudioSessions/VolumeHelpers.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace FocusVolumeControl.AudioSessions
+{
+	internal class VolumeHelpers
+	{
+		public static float GetAdjustedVolume(float startingVolume, int step, int ticks)
+		{
+			var level = startingVolume;
+
+			level += 0.01f * step * ticks;
+			level = Math.Max(level, 0);
+			level = Math.Min(level, 1);
+
+			return level;
+		}
+
+		public static int GetVolumePercentage(float volume) => (int)Math.Round(volume * 100);
+
+	}
+}

src/FocusVolumeControl/FocusVolumeControl.csproj

@@ -56,6 +56,7 @@
   <ItemGroup>
     <Compile Include="AudioSessions\ActiveAudioSessionWrapper.cs" />
     <Compile Include="AudioHelper.cs" />
+    <Compile Include="AudioSessions\VolumeHelpers.cs" />
     <Compile Include="AudioSessions\SystemSoundsAudioSession.cs" />
     <Compile Include="AudioSessions\SystemVolumeAudioSession.cs" />
     <Compile Include="DialAction.cs" />