amadeus: Add missing compressor effect from REV11 (#4010)

* amadeus: Add missing compressor effect from REV11

This was in my reversing notes but seems I completely forgot to
implement it

Also took the opportunity to simplify the Limiter effect a bit.

* Remove some outdated comment

* Address gdkchan's comments

1 files changed, 6 insertions, 0 deletions

diff --git a/Ryujinx.Audio/Renderer/Dsp/FixedPointHelper.cs b/Ryujinx.Audio/Renderer/Dsp/FixedPointHelper.cs
index 0d0ff2ae..280e47c0 100644
--- a/Ryujinx.Audio/Renderer/Dsp/FixedPointHelper.cs
+++ b/Ryujinx.Audio/Renderer/Dsp/FixedPointHelper.cs
@@ -17,6 +17,12 @@ namespace Ryujinx.Audio.Renderer.Dsp
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static float ConvertFloat(float value, int qBits)
+        {
+            return value / (1 << qBits);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static int ToFixed(float value, int qBits)
         {
             return (int)(value * (1 << qBits));