SDK20 and REV15 support (ryubing/ryujinx!50)

See merge request ryubing/ryujinx!50

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

@@ -0,0 +1,69 @@
+using Ryujinx.Audio.Renderer.Server.Splitter;
+using System;
+using System.Runtime.CompilerServices;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class FillBufferCommand : ICommand
+    {
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType => CommandType.FillBuffer;
+
+        public uint EstimatedProcessingTime { get; set; }
+
+        public SplitterDestinationVersion1 Destination1 { get; }
+        public SplitterDestinationVersion2 Destination2 { get; }
+        public bool IsV2 { get; }
+        public int Length { get; }
+        public float Value { get; }
+
+        public FillBufferCommand(SplitterDestinationVersion1 destination, int length, float value, int nodeId)
+        {
+            Enabled = true;
+            NodeId = nodeId;
+
+            Destination1 = destination;
+            IsV2 = false;
+            Length = length;
+            Value = value;
+        }
+        
+        public FillBufferCommand(SplitterDestinationVersion2 destination, int length, float value, int nodeId)
+        {
+            Enabled = true;
+            NodeId = nodeId;
+            
+            Destination2 = destination;
+            IsV2 = true;
+            Length = length;
+            Value = value;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private void ProcessFillBuffer()
+        {
+            if (IsV2)
+            {
+                for (int i = 0; i < Length; i++)
+                {
+                    Destination2.PreviousMixBufferVolume[i] = Value;
+                }
+            }
+            else
+            {
+                for (int i = 0; i < Length; i++)
+                {
+                    Destination1.PreviousMixBufferVolume[i] = Value;
+                }
+            }
+        }
+
+        public void Process(CommandList context)
+        {
+            ProcessFillBuffer();
+        }
+    }
+}