From b8ad676fb8cbe0a43617df41daaf284ab4421c75 Mon Sep 17 00:00:00 2001
From: Mary <me@thog.eu>
Date: Sun, 18 Jul 2021 13:05:11 +0200
Subject: Amadeus: DSP code generation improvements (#2460)

This improve RyuJIT codegen drastically on the DSP side.
This may reduce CPU usage of the DSP thread quite a lot.
---
 .../Dsp/Command/DownMixSurroundToStereoCommand.cs        | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)

(limited to 'Ryujinx.Audio/Renderer/Dsp/Command/DownMixSurroundToStereoCommand.cs')

diff --git a/Ryujinx.Audio/Renderer/Dsp/Command/DownMixSurroundToStereoCommand.cs b/Ryujinx.Audio/Renderer/Dsp/Command/DownMixSurroundToStereoCommand.cs
index f81a2849..1c62ef07 100644
--- a/Ryujinx.Audio/Renderer/Dsp/Command/DownMixSurroundToStereoCommand.cs
+++ b/Ryujinx.Audio/Renderer/Dsp/Command/DownMixSurroundToStereoCommand.cs
@@ -35,7 +35,7 @@ namespace Ryujinx.Audio.Renderer.Dsp.Command
 
         public float[] Coefficients { get; }
 
-        public DownMixSurroundToStereoCommand(uint bufferOffset, Span<byte> inputBufferOffset, Span<byte> outputBufferOffset, ReadOnlySpan<float> downMixParameter, int nodeId)
+        public DownMixSurroundToStereoCommand(uint bufferOffset, Span<byte> inputBufferOffset, Span<byte> outputBufferOffset, float[] downMixParameter, int nodeId)
         {
             Enabled = true;
             NodeId = nodeId;
@@ -49,7 +49,7 @@ namespace Ryujinx.Audio.Renderer.Dsp.Command
                 OutputBufferIndices[i] = (ushort)(bufferOffset + outputBufferOffset[i]);
             }
 
-            Coefficients = downMixParameter.ToArray();
+            Coefficients = downMixParameter;
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
@@ -69,10 +69,6 @@ namespace Ryujinx.Audio.Renderer.Dsp.Command
 
             Span<float> stereoLeft = context.GetBuffer(OutputBufferIndices[0]);
             Span<float> stereoRight = context.GetBuffer(OutputBufferIndices[1]);
-            Span<float> unused2 = context.GetBuffer(OutputBufferIndices[2]);
-            Span<float> unused3 = context.GetBuffer(OutputBufferIndices[3]);
-            Span<float> unused4 = context.GetBuffer(OutputBufferIndices[4]);
-            Span<float> unused5 = context.GetBuffer(OutputBufferIndices[5]);
 
             for (int i = 0; i < context.SampleCount; i++)
             {
@@ -80,10 +76,10 @@ namespace Ryujinx.Audio.Renderer.Dsp.Command
                 stereoRight[i] = DownMixSurroundToStereo(Coefficients, backRight[i], lowFrequency[i], frontCenter[i], frontRight[i]);
             }
 
-            unused2.Fill(0);
-            unused3.Fill(0);
-            unused4.Fill(0);
-            unused5.Fill(0);
+            context.ClearBuffer(OutputBufferIndices[2]);
+            context.ClearBuffer(OutputBufferIndices[3]);
+            context.ClearBuffer(OutputBufferIndices[4]);
+            context.ClearBuffer(OutputBufferIndices[5]);
         }
     }
 }
-- 
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