Fix audio renderer compressor effect (#5742)

* Delete DecibelToLinearExtended and fix Log10 function

* Fix CopyBuffer and ClearBuffer

* Change effect states from class to struct + formatting

* Formatting

* Make UpdateLowPassFilter readonly

* More compressor fixes

src/Ryujinx.Audio/Renderer/Dsp/Command/AuxiliaryBufferCommand.cs

@@ -31,9 +31,18 @@ namespace Ryujinx.Audio.Renderer.Dsp.Command
 
         public bool IsEffectEnabled { get; }
 
-        public AuxiliaryBufferCommand(uint bufferOffset, byte inputBufferOffset, byte outputBufferOffset,
-                          ref AuxiliaryBufferAddresses sendBufferInfo, bool isEnabled, uint countMax,
-                          CpuAddress outputBuffer, CpuAddress inputBuffer, uint updateCount, uint writeOffset, int nodeId)
+        public AuxiliaryBufferCommand(
+            uint bufferOffset,
+            byte inputBufferOffset,
+            byte outputBufferOffset,
+            ref AuxiliaryBufferAddresses sendBufferInfo,
+            bool isEnabled,
+            uint countMax,
+            CpuAddress outputBuffer,
+            CpuAddress inputBuffer,
+            uint updateCount,
+            uint writeOffset,
+            int nodeId)
         {
             Enabled = true;
             NodeId = nodeId;

src/Ryujinx.Audio/Renderer/Dsp/Command/BiquadFilterCommand.cs

@@ -21,7 +21,14 @@ namespace Ryujinx.Audio.Renderer.Dsp.Command
 
         private BiquadFilterParameter _parameter;
 
-        public BiquadFilterCommand(int baseIndex, ref BiquadFilterParameter filter, Memory<BiquadFilterState> biquadFilterStateMemory, int inputBufferOffset, int outputBufferOffset, bool needInitialization, int nodeId)
+        public BiquadFilterCommand(
+            int baseIndex,
+            ref BiquadFilterParameter filter,
+            Memory<BiquadFilterState> biquadFilterStateMemory,
+            int inputBufferOffset,
+            int outputBufferOffset,
+            bool needInitialization,
+            int nodeId)
         {
             _parameter = filter;
             BiquadFilterState = biquadFilterStateMemory;

src/Ryujinx.Audio/Renderer/Dsp/Command/CommandList.cs

@@ -77,7 +77,7 @@ namespace Ryujinx.Audio.Renderer.Dsp.Command
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public unsafe void ClearBuffer(int index)
         {
-            Unsafe.InitBlock((void*)GetBufferPointer(index), 0, SampleCount);
+            Unsafe.InitBlock((void*)GetBufferPointer(index), 0, SampleCount * sizeof(float));
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
@@ -89,7 +89,7 @@ namespace Ryujinx.Audio.Renderer.Dsp.Command
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public unsafe void CopyBuffer(int outputBufferIndex, int inputBufferIndex)
         {
-            Unsafe.CopyBlock((void*)GetBufferPointer(outputBufferIndex), (void*)GetBufferPointer(inputBufferIndex), SampleCount);
+            Unsafe.CopyBlock((void*)GetBufferPointer(outputBufferIndex), (void*)GetBufferPointer(inputBufferIndex), SampleCount * sizeof(float));
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]

src/Ryujinx.Audio/Renderer/Dsp/Command/CompressorCommand.cs

@@ -94,18 +94,18 @@ namespace Ryujinx.Audio.Renderer.Dsp.Command
 
                     float newMean = inputMovingAverage.Update(FloatingPointHelper.MeanSquare(channelInput), _parameter.InputGain);
                     float y = FloatingPointHelper.Log10(newMean) * 10.0f;
-                    float z = 0.0f;
+                    float z = 1.0f;
 
-                    bool unknown10OutOfRange = false;
+                    bool unknown10OutOfRange = y >= state.Unknown10;
 
                     if (newMean < 1.0e-10f)
                     {
-                        z = 1.0f;
+                        y = -100.0f;
 
-                        unknown10OutOfRange = state.Unknown10 < -100.0f;
+                        unknown10OutOfRange = state.Unknown10 <= -100.0f;
                     }
 
-                    if (y >= state.Unknown10 || unknown10OutOfRange)
+                    if (unknown10OutOfRange)
                     {
                         float tmpGain;
 
@@ -118,7 +118,7 @@ namespace Ryujinx.Audio.Renderer.Dsp.Command
                             tmpGain = (y - state.Unknown10) * ((y - state.Unknown10) * -state.CompressorGainReduction);
                         }
 
-                        z = FloatingPointHelper.DecibelToLinearExtended(tmpGain);
+                        z = FloatingPointHelper.DecibelToLinear(tmpGain);
                     }
 
                     float unknown4New = z;

src/Ryujinx.Audio/Renderer/Dsp/Command/DelayCommand.cs

@@ -88,7 +88,7 @@ namespace Ryujinx.Audio.Renderer.Dsp.Command
             float outGain = FixedPointHelper.ToFloat(Parameter.OutGain, FixedPointPrecision);
 
             Matrix2x2 delayFeedback = new(delayFeedbackBaseGain, delayFeedbackCrossGain,
-                                                    delayFeedbackCrossGain, delayFeedbackBaseGain);
+                                          delayFeedbackCrossGain, delayFeedbackBaseGain);
 
             for (int i = 0; i < sampleCount; i++)
             {
@@ -125,9 +125,9 @@ namespace Ryujinx.Audio.Renderer.Dsp.Command
             float outGain = FixedPointHelper.ToFloat(Parameter.OutGain, FixedPointPrecision);
 
             Matrix4x4 delayFeedback = new(delayFeedbackBaseGain, delayFeedbackCrossGain, delayFeedbackCrossGain, 0.0f,
-                                                    delayFeedbackCrossGain, delayFeedbackBaseGain, 0.0f, delayFeedbackCrossGain,
-                                                    delayFeedbackCrossGain, 0.0f, delayFeedbackBaseGain, delayFeedbackCrossGain,
-                                                    0.0f, delayFeedbackCrossGain, delayFeedbackCrossGain, delayFeedbackBaseGain);
+                                          delayFeedbackCrossGain, delayFeedbackBaseGain, 0.0f, delayFeedbackCrossGain,
+                                          delayFeedbackCrossGain, 0.0f, delayFeedbackBaseGain, delayFeedbackCrossGain,
+                                          0.0f, delayFeedbackCrossGain, delayFeedbackCrossGain, delayFeedbackBaseGain);
 
 
             for (int i = 0; i < sampleCount; i++)
@@ -172,11 +172,11 @@ namespace Ryujinx.Audio.Renderer.Dsp.Command
             float outGain = FixedPointHelper.ToFloat(Parameter.OutGain, FixedPointPrecision);
 
             Matrix6x6 delayFeedback = new(delayFeedbackBaseGain, 0.0f, delayFeedbackCrossGain, 0.0f, delayFeedbackCrossGain, 0.0f,
-                                                    0.0f, delayFeedbackBaseGain, delayFeedbackCrossGain, 0.0f, 0.0f, delayFeedbackCrossGain,
-                                                    delayFeedbackCrossGain, delayFeedbackCrossGain, delayFeedbackBaseGain, 0.0f, 0.0f, 0.0f,
-                                                    0.0f, 0.0f, 0.0f, feedbackGain, 0.0f, 0.0f,
-                                                    delayFeedbackCrossGain, 0.0f, 0.0f, 0.0f, delayFeedbackBaseGain, delayFeedbackCrossGain,
-                                                    0.0f, delayFeedbackCrossGain, 0.0f, 0.0f, delayFeedbackCrossGain, delayFeedbackBaseGain);
+                                          0.0f, delayFeedbackBaseGain, delayFeedbackCrossGain, 0.0f, 0.0f, delayFeedbackCrossGain,
+                                          delayFeedbackCrossGain, delayFeedbackCrossGain, delayFeedbackBaseGain, 0.0f, 0.0f, 0.0f,
+                                          0.0f, 0.0f, 0.0f, feedbackGain, 0.0f, 0.0f,
+                                          delayFeedbackCrossGain, 0.0f, 0.0f, 0.0f, delayFeedbackBaseGain, delayFeedbackCrossGain,
+                                          0.0f, delayFeedbackCrossGain, 0.0f, 0.0f, delayFeedbackCrossGain, delayFeedbackBaseGain);
 
             for (int i = 0; i < sampleCount; i++)
             {

src/Ryujinx.Audio/Renderer/Dsp/Command/LimiterCommandVersion2.cs

@@ -28,7 +28,14 @@ namespace Ryujinx.Audio.Renderer.Dsp.Command
 
         private LimiterParameter _parameter;
 
-        public LimiterCommandVersion2(uint bufferOffset, LimiterParameter parameter, Memory<LimiterState> state, Memory<EffectResultState> resultState, bool isEnabled, ulong workBuffer, int nodeId)
+        public LimiterCommandVersion2(
+            uint bufferOffset,
+            LimiterParameter parameter,
+            Memory<LimiterState> state,
+            Memory<EffectResultState> resultState,
+            bool isEnabled,
+            ulong workBuffer,
+            int nodeId)
         {
             Enabled = true;
             NodeId = nodeId;

src/Ryujinx.Audio/Renderer/Dsp/Command/ReverbCommand.cs

@@ -79,53 +79,57 @@ namespace Ryujinx.Audio.Renderer.Dsp.Command
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         private void ProcessReverbMono(ref ReverbState state, ReadOnlySpan<IntPtr> outputBuffers, ReadOnlySpan<IntPtr> inputBuffers, uint sampleCount)
         {
-            ProcessReverbGeneric(ref state,
-                     outputBuffers,
-                     inputBuffers,
-                     sampleCount,
-                     _outputEarlyIndicesTableMono,
-                     _targetEarlyDelayLineIndicesTableMono,
-                     _targetOutputFeedbackIndicesTableMono,
-                     _outputIndicesTableMono);
+            ProcessReverbGeneric(
+                ref state,
+                outputBuffers,
+                inputBuffers,
+                sampleCount,
+                _outputEarlyIndicesTableMono,
+                _targetEarlyDelayLineIndicesTableMono,
+                _targetOutputFeedbackIndicesTableMono,
+                _outputIndicesTableMono);
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         private void ProcessReverbStereo(ref ReverbState state, ReadOnlySpan<IntPtr> outputBuffers, ReadOnlySpan<IntPtr> inputBuffers, uint sampleCount)
         {
-            ProcessReverbGeneric(ref state,
-                     outputBuffers,
-                     inputBuffers,
-                     sampleCount,
-                     _outputEarlyIndicesTableStereo,
-                     _targetEarlyDelayLineIndicesTableStereo,
-                     _targetOutputFeedbackIndicesTableStereo,
-                     _outputIndicesTableStereo);
+            ProcessReverbGeneric(
+                ref state,
+                outputBuffers,
+                inputBuffers,
+                sampleCount,
+                _outputEarlyIndicesTableStereo,
+                _targetEarlyDelayLineIndicesTableStereo,
+                _targetOutputFeedbackIndicesTableStereo,
+                _outputIndicesTableStereo);
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         private void ProcessReverbQuadraphonic(ref ReverbState state, ReadOnlySpan<IntPtr> outputBuffers, ReadOnlySpan<IntPtr> inputBuffers, uint sampleCount)
         {
-            ProcessReverbGeneric(ref state,
-                     outputBuffers,
-                     inputBuffers,
-                     sampleCount,
-                     _outputEarlyIndicesTableQuadraphonic,
-                     _targetEarlyDelayLineIndicesTableQuadraphonic,
-                     _targetOutputFeedbackIndicesTableQuadraphonic,
-                     _outputIndicesTableQuadraphonic);
+            ProcessReverbGeneric(
+                ref state,
+                outputBuffers,
+                inputBuffers,
+                sampleCount,
+                _outputEarlyIndicesTableQuadraphonic,
+                _targetEarlyDelayLineIndicesTableQuadraphonic,
+                _targetOutputFeedbackIndicesTableQuadraphonic,
+                _outputIndicesTableQuadraphonic);
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         private void ProcessReverbSurround(ref ReverbState state, ReadOnlySpan<IntPtr> outputBuffers, ReadOnlySpan<IntPtr> inputBuffers, uint sampleCount)
         {
-            ProcessReverbGeneric(ref state,
-                     outputBuffers,
-                     inputBuffers,
-                     sampleCount,
-                     _outputEarlyIndicesTableSurround,
-                     _targetEarlyDelayLineIndicesTableSurround,
-                     _targetOutputFeedbackIndicesTableSurround,
-                     _outputIndicesTableSurround);
+            ProcessReverbGeneric(
+                ref state,
+                outputBuffers,
+                inputBuffers,
+                sampleCount,
+                _outputEarlyIndicesTableSurround,
+                _targetEarlyDelayLineIndicesTableSurround,
+                _targetOutputFeedbackIndicesTableSurround,
+                _outputIndicesTableSurround);
         }
 
         private unsafe void ProcessReverbGeneric(ref ReverbState state, ReadOnlySpan<IntPtr> outputBuffers, ReadOnlySpan<IntPtr> inputBuffers, uint sampleCount, ReadOnlySpan<int> outputEarlyIndicesTable, ReadOnlySpan<int> targetEarlyDelayLineIndicesTable, ReadOnlySpan<int> targetOutputFeedbackIndicesTable, ReadOnlySpan<int> outputIndicesTable)

src/Ryujinx.Audio/Renderer/Dsp/FloatingPointHelper.cs

@@ -52,7 +52,7 @@ namespace Ryujinx.Audio.Renderer.Dsp
         {
             // NOTE: Nintendo uses an approximation of log10, we don't.
             // As such, we support the same ranges as Nintendo to avoid unexpected behaviours.
-            return MathF.Pow(10, MathF.Max(x, 1.0e-10f));
+            return MathF.Log10(MathF.Max(x, 1.0e-10f));
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
@@ -62,7 +62,8 @@ namespace Ryujinx.Audio.Renderer.Dsp
 
             foreach (float input in inputs)
             {
-                res += (input * input);
+                float normInput = input * (1f / 32768f);
+                res += normInput * normInput;
             }
 
             res /= inputs.Length;
@@ -81,19 +82,6 @@ namespace Ryujinx.Audio.Renderer.Dsp
             return MathF.Pow(10.0f, db / 20.0f);
         }
 
-        /// <summary>
-        /// Map decibel to linear in [0, 2] range.
-        /// </summary>
-        /// <param name="db">The decibel value to convert</param>
-        /// <returns>Converted linear value in [0, 2] range</returns>
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static float DecibelToLinearExtended(float db)
-        {
-            float tmp = MathF.Log2(DecibelToLinear(db));
-
-            return MathF.Truncate(tmp) + MathF.Pow(2.0f, tmp - MathF.Truncate(tmp));
-        }
-
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static float DegreesToRadians(float degrees)
         {

src/Ryujinx.Audio/Renderer/Dsp/State/CompressorState.cs

@@ -3,7 +3,7 @@ using Ryujinx.Audio.Renderer.Parameter.Effect;
 
 namespace Ryujinx.Audio.Renderer.Dsp.State
 {
-    public class CompressorState
+    public struct CompressorState
     {
         public ExponentialMovingAverage InputMovingAverage;
         public float Unknown4;
@@ -45,7 +45,7 @@ namespace Ryujinx.Audio.Renderer.Dsp.State
             CompressorGainReduction = (1.0f - ratio) / Constants.ChannelCountMax;
             Unknown10 = threshold - 1.5f;
             Unknown14 = threshold + 1.5f;
-            OutputGain = FloatingPointHelper.DecibelToLinearExtended(parameter.OutputGain + makeupGain);
+            OutputGain = FloatingPointHelper.DecibelToLinear(parameter.OutputGain + makeupGain);
         }
     }
 }

src/Ryujinx.Audio/Renderer/Dsp/State/DelayState.cs

@@ -4,7 +4,7 @@ using System.Runtime.CompilerServices;
 
 namespace Ryujinx.Audio.Renderer.Dsp.State
 {
-    public class DelayState
+    public struct DelayState
     {
         public DelayLine[] DelayLines { get; }
         public float[] LowPassZ { get; set; }
@@ -53,7 +53,7 @@ namespace Ryujinx.Audio.Renderer.Dsp.State
             LowPassBaseGain = 1.0f - LowPassFeedbackGain;
         }
 
-        public void UpdateLowPassFilter(ref float tempRawRef, uint channelCount)
+        public readonly void UpdateLowPassFilter(ref float tempRawRef, uint channelCount)
         {
             for (int i = 0; i < channelCount; i++)
             {

src/Ryujinx.Audio/Renderer/Dsp/State/LimiterState.cs

@@ -4,7 +4,7 @@ using System;
 
 namespace Ryujinx.Audio.Renderer.Dsp.State
 {
-    public class LimiterState
+    public struct LimiterState
     {
         public ExponentialMovingAverage[] DetectorAverage;
         public ExponentialMovingAverage[] CompressionGainAverage;

src/Ryujinx.Audio/Renderer/Dsp/State/Reverb3dState.cs

@@ -4,7 +4,7 @@ using System;
 
 namespace Ryujinx.Audio.Renderer.Dsp.State
 {
-    public class Reverb3dState
+    public struct Reverb3dState
     {
         private readonly float[] _fdnDelayMinTimes = new float[4] { 5.0f, 6.0f, 13.0f, 14.0f };
         private readonly float[] _fdnDelayMaxTimes = new float[4] { 45.704f, 82.782f, 149.94f, 271.58f };

src/Ryujinx.Audio/Renderer/Dsp/State/ReverbState.cs

@@ -5,7 +5,7 @@ using System;
 
 namespace Ryujinx.Audio.Renderer.Dsp.State
 {
-    public class ReverbState
+    public struct ReverbState
     {
         private static readonly float[] _fdnDelayTimes = new float[20]
         {