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* Remove some outdated comment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, 7 insertions, 6 deletions

diff --git a/Ryujinx.Audio/Renderer/Dsp/State/LimiterState.cs b/Ryujinx.Audio/Renderer/Dsp/State/LimiterState.cs
index 92ed13ff..0560757c 100644
--- a/Ryujinx.Audio/Renderer/Dsp/State/LimiterState.cs
+++ b/Ryujinx.Audio/Renderer/Dsp/State/LimiterState.cs
@@ -1,3 +1,4 @@
+using Ryujinx.Audio.Renderer.Dsp.Effect;
 using Ryujinx.Audio.Renderer.Parameter.Effect;
 using System;
 
@@ -5,20 +6,20 @@ namespace Ryujinx.Audio.Renderer.Dsp.State
 {
     public class LimiterState
     {
-        public float[] DectectorAverage;
-        public float[] CompressionGain;
+        public ExponentialMovingAverage[] DetectorAverage;
+        public ExponentialMovingAverage[] CompressionGainAverage;
         public float[] DelayedSampleBuffer;
         public int[] DelayedSampleBufferPosition;
 
         public LimiterState(ref LimiterParameter parameter, ulong workBuffer)
         {
-            DectectorAverage = new float[parameter.ChannelCount];
-            CompressionGain = new float[parameter.ChannelCount];
+            DetectorAverage = new ExponentialMovingAverage[parameter.ChannelCount];
+            CompressionGainAverage = new ExponentialMovingAverage[parameter.ChannelCount];
             DelayedSampleBuffer = new float[parameter.ChannelCount * parameter.DelayBufferSampleCountMax];
             DelayedSampleBufferPosition = new int[parameter.ChannelCount];
 
-            DectectorAverage.AsSpan().Fill(0.0f);
-            CompressionGain.AsSpan().Fill(1.0f);
+            DetectorAverage.AsSpan().Fill(new ExponentialMovingAverage(0.0f));
+            CompressionGainAverage.AsSpan().Fill(new ExponentialMovingAverage(1.0f));
             DelayedSampleBufferPosition.AsSpan().Fill(0);
             DelayedSampleBuffer.AsSpan().Fill(0.0f);