amadeus: Update to REV10 (#2654)

* amadeus: Update to REV10

This implements all the changes made with REV10 on 13.0.0.

* Address Ack's comment

* Address gdkchan's comment

8 files changed, 384 insertions, 38 deletions

diff --git a/Ryujinx.Audio/Renderer/Dsp/BiquadFilterHelper.cs b/Ryujinx.Audio/Renderer/Dsp/BiquadFilterHelper.cs
new file mode 100644
index 00000000..113f20f9
--- /dev/null
+++ b/Ryujinx.Audio/Renderer/Dsp/BiquadFilterHelper.cs
@@ -0,0 +1,100 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Audio.Renderer.Dsp.State;
+using Ryujinx.Audio.Renderer.Parameter;
+using System;
+using System.Runtime.CompilerServices;
+
+namespace Ryujinx.Audio.Renderer.Dsp
+{
+    public static class BiquadFilterHelper
+    {
+        private const int FixedPointPrecisionForParameter = 14;
+
+        /// <summary>
+        /// Apply a single biquad filter.
+        /// </summary>
+        /// <remarks>This is implemented with a direct form 2.</remarks>
+        /// <param name="parameter">The biquad filter parameter</param>
+        /// <param name="state">The biquad filter state</param>
+        /// <param name="outputBuffer">The output buffer to write the result</param>
+        /// <param name="inputBuffer">The input buffer to write the result</param>
+        /// <param name="sampleCount">The count of samples to process</param>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static void ProcessBiquadFilter(ref BiquadFilterParameter parameter, ref BiquadFilterState state, Span<float> outputBuffer, ReadOnlySpan<float> inputBuffer, uint sampleCount)
+        {
+            float a0 = FixedPointHelper.ToFloat(parameter.Numerator[0], FixedPointPrecisionForParameter);
+            float a1 = FixedPointHelper.ToFloat(parameter.Numerator[1], FixedPointPrecisionForParameter);
+            float a2 = FixedPointHelper.ToFloat(parameter.Numerator[2], FixedPointPrecisionForParameter);
+
+            float b1 = FixedPointHelper.ToFloat(parameter.Denominator[0], FixedPointPrecisionForParameter);
+            float b2 = FixedPointHelper.ToFloat(parameter.Denominator[1], FixedPointPrecisionForParameter);
+
+            for (int i = 0; i < sampleCount; i++)
+            {
+                float input = inputBuffer[i];
+                float output = input * a0 + state.State0;
+
+                state.State0 = input * a1 + output * b1 + state.State1;
+                state.State1 = input * a2 + output * b2;
+
+                outputBuffer[i] = output;
+            }
+        }
+
+        /// <summary>
+        /// Apply multiple biquad filter.
+        /// </summary>
+        /// <remarks>This is implemented with a direct form 1.</remarks>
+        /// <param name="parameters">The biquad filter parameter</param>
+        /// <param name="states">The biquad filter state</param>
+        /// <param name="outputBuffer">The output buffer to write the result</param>
+        /// <param name="inputBuffer">The input buffer to write the result</param>
+        /// <param name="sampleCount">The count of samples to process</param>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static void ProcessBiquadFilter(ReadOnlySpan<BiquadFilterParameter> parameters, Span<BiquadFilterState> states, Span<float> outputBuffer, ReadOnlySpan<float> inputBuffer, uint sampleCount)
+        {
+            for (int stageIndex = 0; stageIndex < parameters.Length; stageIndex++)
+            {
+                BiquadFilterParameter parameter = parameters[stageIndex];
+
+                ref BiquadFilterState state = ref states[stageIndex];
+
+                float a0 = FixedPointHelper.ToFloat(parameter.Numerator[0], FixedPointPrecisionForParameter);
+                float a1 = FixedPointHelper.ToFloat(parameter.Numerator[1], FixedPointPrecisionForParameter);
+                float a2 = FixedPointHelper.ToFloat(parameter.Numerator[2], FixedPointPrecisionForParameter);
+
+                float b1 = FixedPointHelper.ToFloat(parameter.Denominator[0], FixedPointPrecisionForParameter);
+                float b2 = FixedPointHelper.ToFloat(parameter.Denominator[1], FixedPointPrecisionForParameter);
+
+                for (int i = 0; i < sampleCount; i++)
+                {
+                    float input = inputBuffer[i];
+                    float output = input * a0 + state.State0 * a1 + state.State1 * a2 + state.State2 * b1 + state.State3 * b2;
+
+                    state.State1 = state.State0;
+                    state.State0 = input;
+                    state.State3 = state.State2;
+                    state.State2 = output;
+
+                    outputBuffer[i] = output;
+                }
+            }
+        }
+    }
+}
diff --git a/Ryujinx.Audio/Renderer/Dsp/Command/AuxiliaryBufferCommand.cs b/Ryujinx.Audio/Renderer/Dsp/Command/AuxiliaryBufferCommand.cs
index 78d7ea87..15293dd0 100644
--- a/Ryujinx.Audio/Renderer/Dsp/Command/AuxiliaryBufferCommand.cs
+++ b/Ryujinx.Audio/Renderer/Dsp/Command/AuxiliaryBufferCommand.cs
@@ -156,7 +156,7 @@ namespace Ryujinx.Audio.Renderer.Dsp.Command
                 Span<int> outputBufferInt = MemoryMarshal.Cast<float, int>(outputBuffer);
 
                 // Convert input data to the target format for user (int)
-                DataSourceHelper.ToInt(inputBufferInt, inputBuffer, outputBuffer.Length);
+                DataSourceHelper.ToInt(inputBufferInt, inputBuffer, inputBuffer.Length);
 
                 // Send the input to the user
                 Write(context.MemoryManager, OutputBuffer, CountMax, inputBufferInt, context.SampleCount, WriteOffset, UpdateCount);
@@ -177,8 +177,8 @@ namespace Ryujinx.Audio.Renderer.Dsp.Command
             }
             else
             {
-                context.MemoryManager.Fill(BufferInfo.SendBufferInfo, (ulong)Unsafe.SizeOf<AuxiliaryBufferInfo>(), 0);
-                context.MemoryManager.Fill(BufferInfo.ReturnBufferInfo, (ulong)Unsafe.SizeOf<AuxiliaryBufferInfo>(), 0);
+                AuxiliaryBufferInfo.Reset(context.MemoryManager, BufferInfo.SendBufferInfo);
+                AuxiliaryBufferInfo.Reset(context.MemoryManager, BufferInfo.ReturnBufferInfo);
 
                 if (InputBufferIndex != OutputBufferIndex)
                 {
diff --git a/Ryujinx.Audio/Renderer/Dsp/Command/BiquadFilterCommand.cs b/Ryujinx.Audio/Renderer/Dsp/Command/BiquadFilterCommand.cs
index c850bb01..6a1d8ac0 100644
--- a/Ryujinx.Audio/Renderer/Dsp/Command/BiquadFilterCommand.cs
+++ b/Ryujinx.Audio/Renderer/Dsp/Command/BiquadFilterCommand.cs
@@ -32,15 +32,16 @@ namespace Ryujinx.Audio.Renderer.Dsp.Command
 
         public ulong EstimatedProcessingTime { get; set; }
 
-        public BiquadFilterParameter Parameter { get; }
         public Memory<BiquadFilterState> BiquadFilterState { get; }
         public int InputBufferIndex { get; }
         public int OutputBufferIndex { get; }
         public bool NeedInitialization { get; }
 
+        private BiquadFilterParameter _parameter;
+
         public BiquadFilterCommand(int baseIndex, ref BiquadFilterParameter filter, Memory<BiquadFilterState> biquadFilterStateMemory, int inputBufferOffset, int outputBufferOffset, bool needInitialization, int nodeId)
         {
-            Parameter = filter;
+            _parameter = filter;
             BiquadFilterState = biquadFilterStateMemory;
             InputBufferIndex = baseIndex + inputBufferOffset;
             OutputBufferIndex = baseIndex + outputBufferOffset;
@@ -50,30 +51,6 @@ namespace Ryujinx.Audio.Renderer.Dsp.Command
             NodeId = nodeId;
         }
 
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        private void ProcessBiquadFilter(ref BiquadFilterState state, Span<float> outputBuffer, ReadOnlySpan<float> inputBuffer, uint sampleCount)
-        {
-            const int fixedPointPrecisionForParameter = 14;
-
-            float a0 = FixedPointHelper.ToFloat(Parameter.Numerator[0], fixedPointPrecisionForParameter);
-            float a1 = FixedPointHelper.ToFloat(Parameter.Numerator[1], fixedPointPrecisionForParameter);
-            float a2 = FixedPointHelper.ToFloat(Parameter.Numerator[2], fixedPointPrecisionForParameter);
-
-            float b1 = FixedPointHelper.ToFloat(Parameter.Denominator[0], fixedPointPrecisionForParameter);
-            float b2 = FixedPointHelper.ToFloat(Parameter.Denominator[1], fixedPointPrecisionForParameter);
-
-            for (int i = 0; i < sampleCount; i++)
-            {
-                float input = inputBuffer[i];
-                float output = input * a0 + state.Z1;
-
-                state.Z1 = input * a1 + output * b1 + state.Z2;
-                state.Z2 = input * a2 + output * b2;
-
-                outputBuffer[i] = output;
-            }
-        }
-
         public void Process(CommandList context)
         {
             ref BiquadFilterState state = ref BiquadFilterState.Span[0];
@@ -86,7 +63,7 @@ namespace Ryujinx.Audio.Renderer.Dsp.Command
                 state = new BiquadFilterState();
             }
 
-            ProcessBiquadFilter(ref state, outputBuffer, inputBuffer, context.SampleCount);
+            BiquadFilterHelper.ProcessBiquadFilter(ref _parameter, ref state, outputBuffer, inputBuffer, context.SampleCount);
         }
     }
 }
diff --git a/Ryujinx.Audio/Renderer/Dsp/Command/CaptureBufferCommand.cs b/Ryujinx.Audio/Renderer/Dsp/Command/CaptureBufferCommand.cs
new file mode 100644
index 00000000..c6c579d3
--- /dev/null
+++ b/Ryujinx.Audio/Renderer/Dsp/Command/CaptureBufferCommand.cs
@@ -0,0 +1,154 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Audio.Renderer.Dsp.State;
+using Ryujinx.Audio.Renderer.Parameter;
+using Ryujinx.Memory;
+using System;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using static Ryujinx.Audio.Renderer.Dsp.State.AuxiliaryBufferHeader;
+using CpuAddress = System.UInt64;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class CaptureBufferCommand : ICommand
+    {
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType => CommandType.CaptureBuffer;
+
+        public ulong EstimatedProcessingTime { get; set; }
+
+        public uint InputBufferIndex { get; }
+
+        public ulong CpuBufferInfoAddress { get; }
+        public ulong DspBufferInfoAddress { get; }
+
+        public CpuAddress OutputBuffer { get; }
+        public uint CountMax { get; }
+        public uint UpdateCount { get; }
+        public uint WriteOffset { get; }
+
+        public bool IsEffectEnabled { get; }
+
+        public CaptureBufferCommand(uint bufferOffset, byte inputBufferOffset, ulong sendBufferInfo, bool isEnabled,
+                                    uint countMax, CpuAddress outputBuffer, uint updateCount, uint writeOffset, int nodeId)
+        {
+            Enabled = true;
+            NodeId = nodeId;
+            InputBufferIndex = bufferOffset + inputBufferOffset;
+            CpuBufferInfoAddress = sendBufferInfo;
+            DspBufferInfoAddress = sendBufferInfo + (ulong)Unsafe.SizeOf<AuxiliaryBufferHeader>();
+            OutputBuffer = outputBuffer;
+            CountMax = countMax;
+            UpdateCount = updateCount;
+            WriteOffset = writeOffset;
+            IsEffectEnabled = isEnabled;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private uint Write(IVirtualMemoryManager memoryManager, ulong outBufferAddress, uint countMax, ReadOnlySpan<int> buffer, uint count, uint writeOffset, uint updateCount)
+        {
+            if (countMax == 0 || outBufferAddress == 0)
+            {
+                return 0;
+            }
+
+            uint targetWriteOffset = writeOffset + AuxiliaryBufferInfo.GetWriteOffset(memoryManager, DspBufferInfoAddress);
+
+            if (targetWriteOffset > countMax)
+            {
+                return 0;
+            }
+
+            uint remaining = count;
+
+            uint inBufferOffset = 0;
+
+            while (remaining != 0)
+            {
+                uint countToWrite = Math.Min(countMax - targetWriteOffset, remaining);
+
+                memoryManager.Write(outBufferAddress + targetWriteOffset * sizeof(int), MemoryMarshal.Cast<int, byte>(buffer.Slice((int)inBufferOffset, (int)countToWrite)));
+
+                targetWriteOffset = (targetWriteOffset + countToWrite) % countMax;
+                remaining -= countToWrite;
+                inBufferOffset += countToWrite;
+            }
+
+            if (updateCount != 0)
+            {
+                uint dspTotalSampleCount = AuxiliaryBufferInfo.GetTotalSampleCount(memoryManager, DspBufferInfoAddress);
+                uint cpuTotalSampleCount = AuxiliaryBufferInfo.GetTotalSampleCount(memoryManager, CpuBufferInfoAddress);
+
+                uint totalSampleCountDiff = dspTotalSampleCount - cpuTotalSampleCount;
+
+                if (totalSampleCountDiff >= countMax)
+                {
+                    uint dspLostSampleCount = AuxiliaryBufferInfo.GetLostSampleCount(memoryManager, DspBufferInfoAddress);
+                    uint cpuLostSampleCount = AuxiliaryBufferInfo.GetLostSampleCount(memoryManager, CpuBufferInfoAddress);
+
+                    uint lostSampleCountDiff = dspLostSampleCount - cpuLostSampleCount;
+                    uint newLostSampleCount = lostSampleCountDiff + updateCount;
+
+                    if (lostSampleCountDiff > newLostSampleCount)
+                    {
+                        newLostSampleCount = cpuLostSampleCount - 1;
+                    }
+
+                    AuxiliaryBufferInfo.SetLostSampleCount(memoryManager, DspBufferInfoAddress, newLostSampleCount);
+                }
+
+                uint newWriteOffset = (AuxiliaryBufferInfo.GetWriteOffset(memoryManager, DspBufferInfoAddress) + updateCount) % countMax;
+
+                AuxiliaryBufferInfo.SetWriteOffset(memoryManager, DspBufferInfoAddress, newWriteOffset);
+
+                uint newTotalSampleCount = totalSampleCountDiff + newWriteOffset;
+
+                AuxiliaryBufferInfo.SetTotalSampleCount(memoryManager, DspBufferInfoAddress, newTotalSampleCount);
+            }
+
+            return count;
+        }
+
+        public void Process(CommandList context)
+        {
+            Span<float> inputBuffer = context.GetBuffer((int)InputBufferIndex);
+
+            if (IsEffectEnabled)
+            {
+                Span<int> inputBufferInt = MemoryMarshal.Cast<float, int>(inputBuffer);
+
+                // Convert input data to the target format for user (int)
+                DataSourceHelper.ToInt(inputBufferInt, inputBuffer, inputBuffer.Length);
+
+                // Send the input to the user
+                Write(context.MemoryManager, OutputBuffer, CountMax, inputBufferInt, context.SampleCount, WriteOffset, UpdateCount);
+
+                // Convert back to float
+                DataSourceHelper.ToFloat(inputBuffer, inputBufferInt, inputBuffer.Length);
+            }
+            else
+            {
+                AuxiliaryBufferInfo.Reset(context.MemoryManager, DspBufferInfoAddress);
+            }
+        }
+    }
+}
diff --git a/Ryujinx.Audio/Renderer/Dsp/Command/CommandType.cs b/Ryujinx.Audio/Renderer/Dsp/Command/CommandType.cs
index 997a080e..6f324d0e 100644
--- a/Ryujinx.Audio/Renderer/Dsp/Command/CommandType.cs
+++ b/Ryujinx.Audio/Renderer/Dsp/Command/CommandType.cs
@@ -46,6 +46,8 @@ namespace Ryujinx.Audio.Renderer.Dsp.Command
         ClearMixBuffer,
         CopyMixBuffer,
         LimiterVersion1,
-        LimiterVersion2
+        LimiterVersion2,
+        GroupedBiquadFilter,
+        CaptureBuffer
     }
 }
diff --git a/Ryujinx.Audio/Renderer/Dsp/Command/GroupedBiquadFilterCommand.cs b/Ryujinx.Audio/Renderer/Dsp/Command/GroupedBiquadFilterCommand.cs
new file mode 100644
index 00000000..394d74ba
--- /dev/null
+++ b/Ryujinx.Audio/Renderer/Dsp/Command/GroupedBiquadFilterCommand.cs
@@ -0,0 +1,80 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Audio.Renderer.Dsp.State;
+using Ryujinx.Audio.Renderer.Parameter;
+using System;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class GroupedBiquadFilterCommand : ICommand
+    {
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType => CommandType.GroupedBiquadFilter;
+
+        public ulong EstimatedProcessingTime { get; set; }
+
+        private BiquadFilterParameter[] _parameters;
+        private Memory<BiquadFilterState> _biquadFilterStates;
+        private int _inputBufferIndex;
+        private int _outputBufferIndex;
+        private bool[] _isInitialized;
+
+        public GroupedBiquadFilterCommand(int baseIndex, ReadOnlySpan<BiquadFilterParameter> filters, Memory<BiquadFilterState> biquadFilterStateMemory, int inputBufferOffset, int outputBufferOffset, ReadOnlySpan<bool> isInitialized, int nodeId)
+        {
+            _parameters = filters.ToArray();
+            _biquadFilterStates = biquadFilterStateMemory;
+            _inputBufferIndex = baseIndex + inputBufferOffset;
+            _outputBufferIndex = baseIndex + outputBufferOffset;
+            _isInitialized = isInitialized.ToArray();
+
+            Enabled = true;
+            NodeId = nodeId;
+        }
+
+        public void Process(CommandList context)
+        {
+            Span<BiquadFilterState> states = _biquadFilterStates.Span;
+
+            ReadOnlySpan<float> inputBuffer = context.GetBuffer(_inputBufferIndex);
+            Span<float> outputBuffer = context.GetBuffer(_outputBufferIndex);
+
+            for (int i = 0; i < _parameters.Length; i++)
+            {
+                if (!_isInitialized[i])
+                {
+                    states[i] = new BiquadFilterState();
+                }
+            }
+
+            // NOTE: Nintendo also implements a hot path for double biquad filters, but no generic path when the command definition suggests it could be done.
+            // As such we currently only implement a generic path for simplicity.
+            // TODO: Implement double biquad filters fast path.
+            if (_parameters.Length == 1)
+            {
+                BiquadFilterHelper.ProcessBiquadFilter(ref _parameters[0], ref states[0], outputBuffer, inputBuffer, context.SampleCount);
+            }
+            else
+            {
+                BiquadFilterHelper.ProcessBiquadFilter(_parameters, states, outputBuffer, inputBuffer, context.SampleCount);
+            }
+        }
+    }
+}
diff --git a/Ryujinx.Audio/Renderer/Dsp/State/AuxiliaryBufferHeader.cs b/Ryujinx.Audio/Renderer/Dsp/State/AuxiliaryBufferHeader.cs
index 3cf24302..69a16a3d 100644
--- a/Ryujinx.Audio/Renderer/Dsp/State/AuxiliaryBufferHeader.cs
+++ b/Ryujinx.Audio/Renderer/Dsp/State/AuxiliaryBufferHeader.cs
@@ -20,18 +20,22 @@ using System.Runtime.InteropServices;
 
 namespace Ryujinx.Audio.Renderer.Dsp.State
 {
-    [StructLayout(LayoutKind.Sequential, Pack = 1, Size = 0x40)]
+    [StructLayout(LayoutKind.Sequential, Pack = 1, Size = 0x80)]
     public struct AuxiliaryBufferHeader
     {
-        [StructLayout(LayoutKind.Sequential, Pack = 1, Size = 0xC)]
+        [StructLayout(LayoutKind.Sequential, Pack = 1, Size = 0x40)]
         public struct AuxiliaryBufferInfo
         {
             private const uint ReadOffsetPosition = 0x0;
             private const uint WriteOffsetPosition = 0x4;
+            private const uint LostSampleCountPosition = 0x8;
+            private const uint TotalSampleCountPosition = 0xC;
 
             public uint ReadOffset;
             public uint WriteOffset;
-            private uint _reserved;
+            public uint LostSampleCount;
+            public uint TotalSampleCount;
+            private unsafe fixed uint _unknown[12];
 
             public static uint GetReadOffset(IVirtualMemoryManager manager, ulong bufferAddress)
             {
@@ -43,6 +47,16 @@ namespace Ryujinx.Audio.Renderer.Dsp.State
                 return manager.Read<uint>(bufferAddress + WriteOffsetPosition);
             }
 
+            public static uint GetLostSampleCount(IVirtualMemoryManager manager, ulong bufferAddress)
+            {
+                return manager.Read<uint>(bufferAddress + LostSampleCountPosition);
+            }
+
+            public static uint GetTotalSampleCount(IVirtualMemoryManager manager, ulong bufferAddress)
+            {
+                return manager.Read<uint>(bufferAddress + TotalSampleCountPosition);
+            }
+
             public static void SetReadOffset(IVirtualMemoryManager manager, ulong bufferAddress, uint value)
             {
                 manager.Write(bufferAddress + ReadOffsetPosition, value);
@@ -52,9 +66,26 @@ namespace Ryujinx.Audio.Renderer.Dsp.State
             {
                 manager.Write(bufferAddress + WriteOffsetPosition, value);
             }
+
+            public static void SetLostSampleCount(IVirtualMemoryManager manager, ulong bufferAddress, uint value)
+            {
+                manager.Write(bufferAddress + LostSampleCountPosition, value);
+            }
+
+            public static void SetTotalSampleCount(IVirtualMemoryManager manager, ulong bufferAddress, uint value)
+            {
+                manager.Write(bufferAddress + TotalSampleCountPosition, value);
+            }
+
+            public static void Reset(IVirtualMemoryManager manager, ulong bufferAddress)
+            {
+                // NOTE: Lost sample count is never reset, since REV10.
+                manager.Write(bufferAddress + ReadOffsetPosition, 0UL);
+                manager.Write(bufferAddress + TotalSampleCountPosition, 0);
+            }
         }
 
-        public AuxiliaryBufferInfo BufferInfo;
-        public unsafe fixed uint Unknown[13];
+        public AuxiliaryBufferInfo CpuBufferInfo;
+        public AuxiliaryBufferInfo DspBufferInfo;
     }
 }
diff --git a/Ryujinx.Audio/Renderer/Dsp/State/BiquadFilterState.cs b/Ryujinx.Audio/Renderer/Dsp/State/BiquadFilterState.cs
index 9677333d..f9e677e0 100644
--- a/Ryujinx.Audio/Renderer/Dsp/State/BiquadFilterState.cs
+++ b/Ryujinx.Audio/Renderer/Dsp/State/BiquadFilterState.cs
@@ -22,7 +22,9 @@ namespace Ryujinx.Audio.Renderer.Dsp.State
     [StructLayout(LayoutKind.Sequential, Pack = 1, Size = 0x10)]
     public struct BiquadFilterState
     {
-        public float Z1;
-        public float Z2;
+        public float State0;
+        public float State1;
+        public float State2;
+        public float State3;
     }
 }