Haydn: Part 1 (#2007)

* Haydn: Part 1

Based on my reverse of audio 11.0.0.

As always, core implementation under LGPLv3 for the same reasons as for Amadeus.

This place the bases of a more flexible audio system while making audout & audin accurate.

This have the following improvements:
- Complete reimplementation of audout and audin.
- Audin currently only have a dummy backend.
- Dramatically reduce CPU usage by up to 50% in common cases (SoundIO and OpenAL).
- Audio Renderer now can output to 5.1 devices when supported.
- Audio Renderer init its backend on demand instead of keeping two up all the time.
- All backends implementation are now in their own project.
- Ryujinx.Audio.Renderer was renamed Ryujinx.Audio and was refactored because of this.

As a note, games having issues with OpenAL haven't improved and will not
because of OpenAL design (stopping when buffers finish playing causing
possible audio "pops" when buffers are very small).

* Update for latest hexkyz's edits on Switchbrew

* audren: Rollback channel configuration changes

* Address gdkchan's comments

* Fix typo in OpenAL backend driver

* Address last comments

* Fix a nit

* Address gdkchan's comments

4 files changed, 0 insertions, 1059 deletions

diff --git a/Ryujinx.Audio.Renderer/Server/Voice/VoiceChannelResource.cs b/Ryujinx.Audio.Renderer/Server/Voice/VoiceChannelResource.cs
deleted file mode 100644
index 00520cfc..00000000
--- a/Ryujinx.Audio.Renderer/Server/Voice/VoiceChannelResource.cs
+++ /dev/null
@@ -1,57 +0,0 @@
-//
-// 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.Common.Memory;
-using System.Runtime.InteropServices;
-
-namespace Ryujinx.Audio.Renderer.Server.Voice
-{
-    /// <summary>
-    /// Server state for a voice channel resource.
-    /// </summary>
-    [StructLayout(LayoutKind.Sequential, Size = 0xD0, Pack = Alignment)]
-    public struct VoiceChannelResource
-    {
-        public const int Alignment = 0x10;
-
-        /// <summary>
-        /// Mix volumes for the resource.
-        /// </summary>
-        public Array24<float> Mix;
-
-        /// <summary>
-        /// Previous mix volumes for resource.
-        /// </summary>
-        public Array24<float> PreviousMix;
-
-        /// <summary>
-        /// The id of the resource.
-        /// </summary>
-        public uint Id;
-
-        /// <summary>
-        /// Indicate if the resource is used.
-        /// </summary>
-        [MarshalAs(UnmanagedType.I1)]
-        public bool IsUsed;
-
-        public void UpdateState()
-        {
-            Mix.ToSpan().CopyTo(PreviousMix.ToSpan());
-        }
-    }
-}
diff --git a/Ryujinx.Audio.Renderer/Server/Voice/VoiceContext.cs b/Ryujinx.Audio.Renderer/Server/Voice/VoiceContext.cs
deleted file mode 100644
index 0dfaa4d5..00000000
--- a/Ryujinx.Audio.Renderer/Server/Voice/VoiceContext.cs
+++ /dev/null
@@ -1,166 +0,0 @@
-//
-// 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.Common;
-using Ryujinx.Audio.Renderer.Utils;
-using System;
-using System.Diagnostics;
-
-namespace Ryujinx.Audio.Renderer.Server.Voice
-{
-    /// <summary>
-    /// Voice context.
-    /// </summary>
-    public class VoiceContext
-    {
-        /// <summary>
-        /// Storage of the sorted indices to <see cref="VoiceState"/>.
-        /// </summary>
-        private Memory<int> _sortedVoices;
-
-        /// <summary>
-        /// Storage for <see cref="VoiceState"/>.
-        /// </summary>
-        private Memory<VoiceState> _voices;
-
-        /// <summary>
-        /// Storage for <see cref="VoiceChannelResource"/>.
-        /// </summary>
-        private Memory<VoiceChannelResource> _voiceChannelResources;
-
-        /// <summary>
-        /// Storage for <see cref="VoiceUpdateState"/> that are used during audio renderer server updates.
-        /// </summary>
-        private Memory<VoiceUpdateState> _voiceUpdateStatesCpu;
-
-        /// <summary>
-        /// Storage for <see cref="VoiceUpdateState"/> for the <see cref="Dsp.AudioProcessor"/>.
-        /// </summary>
-        private Memory<VoiceUpdateState> _voiceUpdateStatesDsp;
-
-        /// <summary>
-        /// The total voice count.
-        /// </summary>
-        private uint _voiceCount;
-
-        public void Initialize(Memory<int> sortedVoices, Memory<VoiceState> voices, Memory<VoiceChannelResource> voiceChannelResources, Memory<VoiceUpdateState> voiceUpdateStatesCpu, Memory<VoiceUpdateState> voiceUpdateStatesDsp, uint voiceCount)
-        {
-            _sortedVoices = sortedVoices;
-            _voices = voices;
-            _voiceChannelResources = voiceChannelResources;
-            _voiceUpdateStatesCpu = voiceUpdateStatesCpu;
-            _voiceUpdateStatesDsp = voiceUpdateStatesDsp;
-            _voiceCount = voiceCount;
-        }
-
-        /// <summary>
-        /// Get the total voice count.
-        /// </summary>
-        /// <returns>The total voice count.</returns>
-        public uint GetCount()
-        {
-            return _voiceCount;
-        }
-
-        /// <summary>
-        /// Get a reference to a <see cref="VoiceChannelResource"/> at the given <paramref name="id"/>.
-        /// </summary>
-        /// <param name="id">The index to use.</param>
-        /// <returns>A reference to a <see cref="VoiceChannelResource"/> at the given <paramref name="id"/>.</returns>
-        public ref VoiceChannelResource GetChannelResource(int id)
-        {
-            return ref SpanIOHelper.GetFromMemory(_voiceChannelResources, id, _voiceCount);
-        }
-
-        /// <summary>
-        /// Get a <see cref="Memory{VoiceUpdateState}"/> at the given <paramref name="id"/>.
-        /// </summary>
-        /// <param name="id">The index to use.</param>
-        /// <returns>A <see cref="Memory{VoiceUpdateState}"/> at the given <paramref name="id"/>.</returns>
-        /// <remarks>The returned <see cref="Memory{VoiceUpdateState}"/> should only be used when updating the server state.</remarks>
-        public Memory<VoiceUpdateState> GetUpdateStateForCpu(int id)
-        {
-            return SpanIOHelper.GetMemory(_voiceUpdateStatesCpu, id, _voiceCount);
-        }
-
-        /// <summary>
-        /// Get a <see cref="Memory{VoiceUpdateState}"/> at the given <paramref name="id"/>.
-        /// </summary>
-        /// <param name="id">The index to use.</param>
-        /// <returns>A <see cref="Memory{VoiceUpdateState}"/> at the given <paramref name="id"/>.</returns>
-        /// <remarks>The returned <see cref="Memory{VoiceUpdateState}"/> should only be used in the context of processing on the <see cref="Dsp.AudioProcessor"/>.</remarks>
-        public Memory<VoiceUpdateState> GetUpdateStateForDsp(int id)
-        {
-            return SpanIOHelper.GetMemory(_voiceUpdateStatesDsp, id, _voiceCount);
-        }
-
-        /// <summary>
-        /// Get a reference to a <see cref="VoiceState"/> at the given <paramref name="id"/>.
-        /// </summary>
-        /// <param name="id">The index to use.</param>
-        /// <returns>A reference to a <see cref="VoiceState"/> at the given <paramref name="id"/>.</returns>
-        public ref VoiceState GetState(int id)
-        {
-            return ref SpanIOHelper.GetFromMemory(_voices, id, _voiceCount);
-        }
-
-        public ref VoiceState GetSortedState(int id)
-        {
-            Debug.Assert(id >= 0 && id < _voiceCount);
-
-            return ref GetState(_sortedVoices.Span[id]);
-        }
-
-        /// <summary>
-        /// Update internal state during command generation.
-        /// </summary>
-        public void UpdateForCommandGeneration()
-        {
-            _voiceUpdateStatesDsp.CopyTo(_voiceUpdateStatesCpu);
-        }
-
-        /// <summary>
-        /// Sort the internal voices by priority and sorting order (if the priorities match).
-        /// </summary>
-        public void Sort()
-        {
-            for (int i = 0; i < _voiceCount; i++)
-            {
-                _sortedVoices.Span[i] = i;
-            }
-
-            int[] sortedVoicesTemp = _sortedVoices.Slice(0, (int)GetCount()).ToArray();
-
-            Array.Sort(sortedVoicesTemp, (a, b) =>
-            {
-                ref VoiceState aState = ref GetState(a);
-                ref VoiceState bState = ref GetState(b);
-
-                int result = aState.Priority.CompareTo(bState.Priority);
-
-                if (result == 0)
-                {
-                    return aState.SortingOrder.CompareTo(bState.SortingOrder);
-                }
-
-                return result;
-            });
-
-            sortedVoicesTemp.AsSpan().CopyTo(_sortedVoices.Span);
-        }
-    }
-}
diff --git a/Ryujinx.Audio.Renderer/Server/Voice/VoiceState.cs b/Ryujinx.Audio.Renderer/Server/Voice/VoiceState.cs
deleted file mode 100644
index f30ee2f7..00000000
--- a/Ryujinx.Audio.Renderer/Server/Voice/VoiceState.cs
+++ /dev/null
@@ -1,715 +0,0 @@
-//
-// 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.Common;
-using Ryujinx.Audio.Renderer.Parameter;
-using Ryujinx.Audio.Renderer.Server.MemoryPool;
-using Ryujinx.Common.Memory;
-using Ryujinx.Common.Utilities;
-using System;
-using System.Diagnostics;
-using System.Runtime.InteropServices;
-using static Ryujinx.Audio.Renderer.Common.BehaviourParameter;
-using static Ryujinx.Audio.Renderer.Parameter.VoiceInParameter;
-
-namespace Ryujinx.Audio.Renderer.Server.Voice
-{
-    [StructLayout(LayoutKind.Sequential, Pack = Alignment)]
-    public struct VoiceState
-    {
-        public const int Alignment = 0x10;
-
-        /// <summary>
-        /// Set to true if the voice is used.
-        /// </summary>
-        [MarshalAs(UnmanagedType.I1)]
-        public bool InUse;
-
-        /// <summary>
-        /// Set to true if the voice is new.
-        /// </summary>
-        [MarshalAs(UnmanagedType.I1)]
-        public bool IsNew;
-
-        [MarshalAs(UnmanagedType.I1)]
-        public bool WasPlaying;
-
-        /// <summary>
-        /// The <see cref="SampleFormat"/> of the voice.
-        /// </summary>
-        public SampleFormat SampleFormat;
-
-        /// <summary>
-        /// The sample rate of the voice.
-        /// </summary>
-        public uint SampleRate;
-
-        /// <summary>
-        /// The total channel count used.
-        /// </summary>
-        public uint ChannelsCount;
-
-        /// <summary>
-        /// Id of the voice.
-        /// </summary>
-        public int Id;
-
-        /// <summary>
-        /// Node id of the voice.
-        /// </summary>
-        public int NodeId;
-
-        /// <summary>
-        /// The target mix id of the voice.
-        /// </summary>
-        public int MixId;
-
-        /// <summary>
-        /// The current voice <see cref="Types.PlayState"/>.
-        /// </summary>
-        public Types.PlayState PlayState;
-
-        /// <summary>
-        /// The previous voice <see cref="Types.PlayState"/>.
-        /// </summary>
-        public Types.PlayState PreviousPlayState;
-
-        /// <summary>
-        /// The priority of the voice.
-        /// </summary>
-        public uint Priority;
-
-        /// <summary>
-        /// Target sorting position of the voice. (used to sort voice with the same <see cref="Priority"/>)
-        /// </summary>
-        public uint SortingOrder;
-
-        /// <summary>
-        /// The pitch used on the voice.
-        /// </summary>
-        public float Pitch;
-
-        /// <summary>
-        /// The output volume of the voice.
-        /// </summary>
-        public float Volume;
-
-        /// <summary>
-        /// The previous output volume of the voice.
-        /// </summary>
-        public float PreviousVolume;
-
-        /// <summary>
-        /// Biquad filters to apply to the output of the voice.
-        /// </summary>
-        public Array2<BiquadFilterParameter> BiquadFilters;
-
-        /// <summary>
-        /// Total count of <see cref="WaveBufferInternal"/> of the voice.
-        /// </summary>
-        public uint WaveBuffersCount;
-
-        /// <summary>
-        /// Current playing <see cref="WaveBufferInternal"/> of the voice.
-        /// </summary>
-        public uint WaveBuffersIndex;
-
-        /// <summary>
-        /// Change the behaviour of the voice.
-        /// </summary>
-        /// <remarks>This was added on REV5.</remarks>
-        public DecodingBehaviour DecodingBehaviour;
-
-        /// <summary>
-        /// User state <see cref="AddressInfo"/> required by the data source.
-        /// </summary>
-        /// <remarks>Only used for <see cref="SampleFormat.Adpcm"/> as the GC-ADPCM coefficients.</remarks>
-        public AddressInfo DataSourceStateAddressInfo;
-
-        /// <summary>
-        /// The wavebuffers of this voice.
-        /// </summary>
-        public Array4<WaveBuffer> WaveBuffers;
-
-        /// <summary>
-        /// The channel resource ids associated to the voice.
-        /// </summary>
-        public Array6<int> ChannelResourceIds;
-
-        /// <summary>
-        /// The target splitter id of the voice.
-        /// </summary>
-        public uint SplitterId;
-
-        /// <summary>
-        /// Change the Sample Rate Conversion (SRC) quality of the voice.
-        /// </summary>
-        /// <remarks>This was added on REV8.</remarks>
-        public SampleRateConversionQuality SrcQuality;
-
-        /// <summary>
-        /// If set to true, the voice was dropped.
-        /// </summary>
-        [MarshalAs(UnmanagedType.I1)]
-        public bool VoiceDropFlag;
-
-        /// <summary>
-        /// Set to true if the data source state work buffer wasn't mapped.
-        /// </summary>
-        [MarshalAs(UnmanagedType.I1)]
-        public bool DataSourceStateUnmapped;
-
-        /// <summary>
-        /// Set to true if any of the <see cref="WaveBuffer.BufferAddressInfo"/> work buffer wasn't mapped.
-        /// </summary>
-        [MarshalAs(UnmanagedType.I1)]
-        public bool BufferInfoUnmapped;
-
-        /// <summary>
-        /// The biquad filter initialization state storage.
-        /// </summary>
-        private BiquadFilterNeedInitializationArrayStruct _biquadFilterNeedInitialization;
-
-        /// <summary>
-        /// Flush the amount of wavebuffer specified. This will result in the wavebuffer being skipped and marked played.
-        /// </summary>
-        /// <remarks>This was added on REV5.</remarks>
-        public byte FlushWaveBufferCount;
-
-        [StructLayout(LayoutKind.Sequential, Size = RendererConstants.VoiceBiquadFilterCount)]
-        private struct BiquadFilterNeedInitializationArrayStruct { }
-
-        /// <summary>
-        /// The biquad filter initialization state array.
-        /// </summary>
-        public Span<bool> BiquadFilterNeedInitialization => SpanHelpers.AsSpan<BiquadFilterNeedInitializationArrayStruct, bool>(ref _biquadFilterNeedInitialization);
-
-        /// <summary>
-        /// Initialize the <see cref="VoiceState"/>.
-        /// </summary>
-        public void Initialize()
-        {
-            IsNew = false;
-            VoiceDropFlag = false;
-            DataSourceStateUnmapped = false;
-            BufferInfoUnmapped = false;
-            FlushWaveBufferCount = 0;
-            PlayState = Types.PlayState.Stopped;
-            Priority = RendererConstants.VoiceLowestPriority;
-            Id = 0;
-            NodeId = 0;
-            SampleRate = 0;
-            SampleFormat = SampleFormat.Invalid;
-            ChannelsCount = 0;
-            Pitch = 0.0f;
-            Volume= 0.0f;
-            PreviousVolume = 0.0f;
-            BiquadFilters.ToSpan().Fill(new BiquadFilterParameter());
-            WaveBuffersCount = 0;
-            WaveBuffersIndex = 0;
-            MixId = RendererConstants.UnusedMixId;
-            SplitterId = RendererConstants.UnusedSplitterId;
-            DataSourceStateAddressInfo.Setup(0, 0);
-
-            InitializeWaveBuffers();
-        }
-
-        /// <summary>
-        /// Initialize the <see cref="WaveBuffer"/> in this <see cref="VoiceState"/>.
-        /// </summary>
-        private void InitializeWaveBuffers()
-        {
-            for (int i = 0; i < WaveBuffers.Length; i++)
-            {
-                WaveBuffers[i].StartSampleOffset = 0;
-                WaveBuffers[i].EndSampleOffset = 0;
-                WaveBuffers[i].ShouldLoop = false;
-                WaveBuffers[i].IsEndOfStream = false;
-                WaveBuffers[i].BufferAddressInfo.Setup(0, 0);
-                WaveBuffers[i].ContextAddressInfo.Setup(0, 0);
-                WaveBuffers[i].IsSendToAudioProcessor = true;
-            }
-        }
-
-        /// <summary>
-        /// Check if the voice needs to be skipped.
-        /// </summary>
-        /// <returns>Returns true if the voice needs to be skipped.</returns>
-        public bool ShouldSkip()
-        {
-            return !InUse || WaveBuffersCount == 0 || DataSourceStateUnmapped || BufferInfoUnmapped || VoiceDropFlag;
-        }
-
-        /// <summary>
-        /// Return true if the mix has any destinations.
-        /// </summary>
-        /// <returns>True if the mix has any destinations.</returns>
-        public bool HasAnyDestination()
-        {
-            return MixId != RendererConstants.UnusedMixId || SplitterId != RendererConstants.UnusedSplitterId;
-        }
-
-        /// <summary>
-        /// Indicate if the server voice information needs to be updated.
-        /// </summary>
-        /// <param name="parameter">The user parameter.</param>
-        /// <returns>Return true, if the server voice information needs to be updated.</returns>
-        private bool ShouldUpdateParameters(ref VoiceInParameter parameter)
-        {
-            if (DataSourceStateAddressInfo.CpuAddress == parameter.DataSourceStateAddress)
-            {
-                return DataSourceStateAddressInfo.Size != parameter.DataSourceStateSize;
-            }
-
-            return DataSourceStateAddressInfo.CpuAddress != parameter.DataSourceStateAddress ||
-                   DataSourceStateAddressInfo.Size != parameter.DataSourceStateSize           ||
-                   DataSourceStateUnmapped;
-        }
-
-        /// <summary>
-        /// Update the internal state from a user parameter.
-        /// </summary>
-        /// <param name="outErrorInfo">The possible <see cref="ErrorInfo"/> that was generated.</param>
-        /// <param name="parameter">The user parameter.</param>
-        /// <param name="poolMapper">The mapper to use.</param>
-        /// <param name="behaviourContext">The behaviour context.</param>
-        public void UpdateParameters(out ErrorInfo outErrorInfo, ref VoiceInParameter parameter, ref PoolMapper poolMapper, ref BehaviourContext behaviourContext)
-        {
-            InUse = parameter.InUse;
-            Id = parameter.Id;
-            NodeId = parameter.NodeId;
-
-            UpdatePlayState(parameter.PlayState);
-
-            SrcQuality = parameter.SrcQuality;
-
-            Priority = parameter.Priority;
-            SortingOrder = parameter.SortingOrder;
-            SampleRate = parameter.SampleRate;
-            SampleFormat = parameter.SampleFormat;
-            ChannelsCount = parameter.ChannelCount;
-            Pitch = parameter.Pitch;
-            Volume = parameter.Volume;
-            parameter.BiquadFilters.ToSpan().CopyTo(BiquadFilters.ToSpan());
-            WaveBuffersCount = parameter.WaveBuffersCount;
-            WaveBuffersIndex = parameter.WaveBuffersIndex;
-
-            if (behaviourContext.IsFlushVoiceWaveBuffersSupported())
-            {
-                FlushWaveBufferCount += parameter.FlushWaveBufferCount;
-            }
-
-            MixId = parameter.MixId;
-
-            if (behaviourContext.IsSplitterSupported())
-            {
-                SplitterId = parameter.SplitterId;
-            }
-            else
-            {
-                SplitterId = RendererConstants.UnusedSplitterId;
-            }
-
-            parameter.ChannelResourceIds.ToSpan().CopyTo(ChannelResourceIds.ToSpan());
-
-            DecodingBehaviour behaviour = DecodingBehaviour.Default;
-
-            if (behaviourContext.IsDecodingBehaviourFlagSupported())
-            {
-                behaviour = parameter.DecodingBehaviourFlags;
-            }
-
-            DecodingBehaviour = behaviour;
-
-            if (parameter.ResetVoiceDropFlag)
-            {
-                VoiceDropFlag = false;
-            }
-
-            if (ShouldUpdateParameters(ref parameter))
-            {
-                DataSourceStateUnmapped = !poolMapper.TryAttachBuffer(out outErrorInfo, ref DataSourceStateAddressInfo, parameter.DataSourceStateAddress, parameter.DataSourceStateSize);
-            }
-            else
-            {
-                outErrorInfo = new ErrorInfo();
-            }
-        }
-
-        /// <summary>
-        /// Update the internal play state from user play state.
-        /// </summary>
-        /// <param name="userPlayState">The target user play state.</param>
-        public void UpdatePlayState(PlayState userPlayState)
-        {
-            Types.PlayState oldServerPlayState = PlayState;
-
-            PreviousPlayState = oldServerPlayState;
-
-            Types.PlayState newServerPlayState;
-
-            switch (userPlayState)
-            {
-                case Common.PlayState.Start:
-                    newServerPlayState = Types.PlayState.Started;
-                    break;
-
-                case Common.PlayState.Stop:
-                    if (oldServerPlayState == Types.PlayState.Stopped)
-                    {
-                        return;
-                    }
-
-                    newServerPlayState = Types.PlayState.Stopping;
-                    break;
-
-                case Common.PlayState.Pause:
-                    newServerPlayState = Types.PlayState.Paused;
-                    break;
-
-                default:
-                    throw new NotImplementedException($"Unhandled PlayState.{userPlayState}");
-            }
-
-            PlayState = newServerPlayState;
-        }
-
-        /// <summary>
-        /// Write the status of the voice to the given user output.
-        /// </summary>
-        /// <param name="outStatus">The given user output.</param>
-        /// <param name="parameter">The user parameter.</param>
-        /// <param name="voiceUpdateStates">The voice states associated to the <see cref="VoiceState"/>.</param>
-        public void WriteOutStatus(ref VoiceOutStatus outStatus, ref VoiceInParameter parameter, Memory<VoiceUpdateState>[] voiceUpdateStates)
-        {
-#if DEBUG
-            // Sanity check in debug mode of the internal state
-            if (!parameter.IsNew && !IsNew)
-            {
-                for (int i = 1; i < ChannelsCount; i++)
-                {
-                    ref VoiceUpdateState stateA = ref voiceUpdateStates[i - 1].Span[0];
-                    ref VoiceUpdateState stateB = ref voiceUpdateStates[i].Span[0];
-
-                    Debug.Assert(stateA.WaveBufferConsumed == stateB.WaveBufferConsumed);
-                    Debug.Assert(stateA.PlayedSampleCount == stateB.PlayedSampleCount);
-                    Debug.Assert(stateA.Offset == stateB.Offset);
-                    Debug.Assert(stateA.WaveBufferIndex == stateB.WaveBufferIndex);
-                    Debug.Assert(stateA.Fraction == stateB.Fraction);
-                    Debug.Assert(stateA.IsWaveBufferValid.SequenceEqual(stateB.IsWaveBufferValid));
-                }
-            }
-#endif
-            if (parameter.IsNew || IsNew)
-            {
-                IsNew = true;
-
-                outStatus.VoiceDropFlag = false;
-                outStatus.PlayedWaveBuffersCount = 0;
-                outStatus.PlayedSampleCount = 0;
-            }
-            else
-            {
-                ref VoiceUpdateState state = ref voiceUpdateStates[0].Span[0];
-
-                outStatus.VoiceDropFlag = VoiceDropFlag;
-                outStatus.PlayedWaveBuffersCount = state.WaveBufferConsumed;
-                outStatus.PlayedSampleCount = state.PlayedSampleCount;
-            }
-        }
-
-        /// <summary>
-        /// Update the internal state of all the <see cref="WaveBuffer"/> of the <see cref="VoiceState"/>.
-        /// </summary>
-        /// <param name="errorInfos">An array of <see cref="ErrorInfo"/> used to report errors when mapping any of the <see cref="WaveBuffer"/>.</param>
-        /// <param name="parameter">The user parameter.</param>
-        /// <param name="voiceUpdateStates">The voice states associated to the <see cref="VoiceState"/>.</param>
-        /// <param name="mapper">The mapper to use.</param>
-        /// <param name="behaviourContext">The behaviour context.</param>
-        public void UpdateWaveBuffers(out ErrorInfo[] errorInfos, ref VoiceInParameter parameter, Memory<VoiceUpdateState>[] voiceUpdateStates, ref PoolMapper mapper, ref BehaviourContext behaviourContext)
-        {
-            errorInfos = new ErrorInfo[RendererConstants.VoiceWaveBufferCount * 2];
-
-            if (parameter.IsNew)
-            {
-                InitializeWaveBuffers();
-
-                for (int i = 0; i < parameter.ChannelCount; i++)
-                {
-                    voiceUpdateStates[i].Span[0].IsWaveBufferValid.Fill(false);
-                }
-            }
-
-            ref VoiceUpdateState voiceUpdateState = ref voiceUpdateStates[0].Span[0];
-
-            for (int i = 0; i < RendererConstants.VoiceWaveBufferCount; i++)
-            {
-                UpdateWaveBuffer(errorInfos.AsSpan().Slice(i * 2, 2), ref WaveBuffers[i], ref parameter.WaveBuffers[i], parameter.SampleFormat, voiceUpdateState.IsWaveBufferValid[i], ref mapper, ref behaviourContext);
-            }
-        }
-
-        /// <summary>
-        /// Update the internal state of one of the <see cref="WaveBuffer"/> of the <see cref="VoiceState"/>.
-        /// </summary>
-        /// <param name="errorInfos">A <see cref="Span{ErrorInfo}"/> used to report errors when mapping the <see cref="WaveBuffer"/>.</param>
-        /// <param name="waveBuffer">The <see cref="WaveBuffer"/> to update.</param>
-        /// <param name="inputWaveBuffer">The <see cref="WaveBufferInternal"/> from the user input.</param>
-        /// <param name="sampleFormat">The <see cref="SampleFormat"/> from the user input.</param>
-        /// <param name="isValid">If set to true, the server side wavebuffer is considered valid.</param>
-        /// <param name="mapper">The mapper to use.</param>
-        /// <param name="behaviourContext">The behaviour context.</param>
-        private void UpdateWaveBuffer(Span<ErrorInfo> errorInfos, ref WaveBuffer waveBuffer, ref WaveBufferInternal inputWaveBuffer, SampleFormat sampleFormat, bool isValid, ref PoolMapper mapper, ref BehaviourContext behaviourContext)
-        {
-            if (!isValid && waveBuffer.IsSendToAudioProcessor && waveBuffer.BufferAddressInfo.CpuAddress != 0)
-            {
-                mapper.ForceUnmap(ref waveBuffer.BufferAddressInfo);
-                waveBuffer.BufferAddressInfo.Setup(0, 0);
-            }
-
-            if (!inputWaveBuffer.SentToServer || BufferInfoUnmapped)
-            {
-                if (inputWaveBuffer.IsSampleOffsetValid(sampleFormat))
-                {
-                    Debug.Assert(waveBuffer.IsSendToAudioProcessor);
-
-                    waveBuffer.IsSendToAudioProcessor = false;
-                    waveBuffer.StartSampleOffset = inputWaveBuffer.StartSampleOffset;
-                    waveBuffer.EndSampleOffset = inputWaveBuffer.EndSampleOffset;
-                    waveBuffer.ShouldLoop = inputWaveBuffer.ShouldLoop;
-                    waveBuffer.IsEndOfStream = inputWaveBuffer.IsEndOfStream;
-                    waveBuffer.LoopStartSampleOffset = inputWaveBuffer.LoopFirstSampleOffset;
-                    waveBuffer.LoopEndSampleOffset = inputWaveBuffer.LoopLastSampleOffset;
-                    waveBuffer.LoopCount = inputWaveBuffer.LoopCount;
-
-                    BufferInfoUnmapped = !mapper.TryAttachBuffer(out ErrorInfo bufferInfoError, ref waveBuffer.BufferAddressInfo, inputWaveBuffer.Address, inputWaveBuffer.Size);
-
-                    errorInfos[0] = bufferInfoError;
-
-                    if (sampleFormat == SampleFormat.Adpcm && behaviourContext.IsAdpcmLoopContextBugFixed() && inputWaveBuffer.ContextAddress != 0)
-                    {
-                        bool adpcmLoopContextMapped = mapper.TryAttachBuffer(out ErrorInfo adpcmLoopContextInfoError,
-                                                                             ref waveBuffer.ContextAddressInfo,
-                                                                             inputWaveBuffer.ContextAddress,
-                                                                             inputWaveBuffer.ContextSize);
-
-                        errorInfos[1] = adpcmLoopContextInfoError;
-
-                        if (adpcmLoopContextMapped)
-                        {
-                            BufferInfoUnmapped = DataSourceStateUnmapped;
-                        }
-                        else
-                        {
-                            BufferInfoUnmapped = true;
-                        }
-                    }
-                    else
-                    {
-                        waveBuffer.ContextAddressInfo.Setup(0, 0);
-                    }
-                }
-                else
-                {
-                    errorInfos[0].ErrorCode = ResultCode.InvalidAddressInfo;
-                    errorInfos[0].ExtraErrorInfo = inputWaveBuffer.Address;
-                }
-            }
-        }
-
-        /// <summary>
-        /// Reset the resources associated to this <see cref="VoiceState"/>.
-        /// </summary>
-        /// <param name="context">The voice context.</param>
-        private void ResetResources(VoiceContext context)
-        {
-            for (int i = 0; i < ChannelsCount; i++)
-            {
-                int channelResourceId = ChannelResourceIds[i];
-
-                ref VoiceChannelResource voiceChannelResource = ref context.GetChannelResource(channelResourceId);
-
-                Debug.Assert(voiceChannelResource.IsUsed);
-
-                Memory<VoiceUpdateState> dspSharedState = context.GetUpdateStateForDsp(channelResourceId);
-
-                MemoryMarshal.Cast<VoiceUpdateState, byte>(dspSharedState.Span).Fill(0);
-
-                voiceChannelResource.UpdateState();
-            }
-        }
-
-        /// <summary>
-        /// Flush a certain amount of <see cref="WaveBuffer"/>.
-        /// </summary>
-        /// <param name="waveBufferCount">The amount of wavebuffer to flush.</param>
-        /// <param name="voiceUpdateStates">The voice states associated to the <see cref="VoiceState"/>.</param>
-        /// <param name="channelCount">The channel count from user input.</param>
-        private void FlushWaveBuffers(uint waveBufferCount, Memory<VoiceUpdateState>[] voiceUpdateStates, uint channelCount)
-        {
-            uint waveBufferIndex = WaveBuffersIndex;
-
-            for (int i = 0; i < waveBufferCount; i++)
-            {
-                WaveBuffers[(int)waveBufferIndex].IsSendToAudioProcessor = true;
-
-                for (int j = 0; j < channelCount; j++)
-                {
-                    ref VoiceUpdateState voiceUpdateState = ref voiceUpdateStates[j].Span[0];
-
-                    voiceUpdateState.WaveBufferIndex = (voiceUpdateState.WaveBufferIndex + 1) % RendererConstants.VoiceWaveBufferCount;
-                    voiceUpdateState.WaveBufferConsumed++;
-                    voiceUpdateState.IsWaveBufferValid[(int)waveBufferIndex] = false;
-                }
-
-                waveBufferIndex = (waveBufferIndex + 1) % RendererConstants.VoiceWaveBufferCount;
-            }
-        }
-
-        /// <summary>
-        /// Update the internal parameters for command generation.
-        /// </summary>
-        /// <param name="voiceUpdateStates">The voice states associated to the <see cref="VoiceState"/>.</param>
-        /// <returns>Return true if this voice should be played.</returns>
-        public bool UpdateParametersForCommandGeneration(Memory<VoiceUpdateState>[] voiceUpdateStates)
-        {
-            if (FlushWaveBufferCount != 0)
-            {
-                FlushWaveBuffers(FlushWaveBufferCount, voiceUpdateStates, ChannelsCount);
-
-                FlushWaveBufferCount = 0;
-            }
-
-            switch (PlayState)
-            {
-                case Types.PlayState.Started:
-                    for (int i = 0; i < WaveBuffers.Length; i++)
-                    {
-                        ref WaveBuffer wavebuffer = ref WaveBuffers[i];
-
-                        if (!wavebuffer.IsSendToAudioProcessor)
-                        {
-                            for (int y = 0; y < ChannelsCount; y++)
-                            {
-                                Debug.Assert(!voiceUpdateStates[y].Span[0].IsWaveBufferValid[i]);
-
-                                voiceUpdateStates[y].Span[0].IsWaveBufferValid[i] = true;
-                            }
-
-                            wavebuffer.IsSendToAudioProcessor = true;
-                        }
-                    }
-
-                    WasPlaying = false;
-
-                    ref VoiceUpdateState primaryVoiceUpdateState = ref voiceUpdateStates[0].Span[0];
-
-                    for (int i = 0; i < primaryVoiceUpdateState.IsWaveBufferValid.Length; i++)
-                    {
-                        if (primaryVoiceUpdateState.IsWaveBufferValid[i])
-                        {
-                            return true;
-                        }
-                    }
-
-                    return false;
-
-                case Types.PlayState.Stopping:
-                    for (int i = 0; i < WaveBuffers.Length; i++)
-                    {
-                        ref WaveBuffer wavebuffer = ref WaveBuffers[i];
-
-                        wavebuffer.IsSendToAudioProcessor = true;
-
-                        for (int j = 0; j < ChannelsCount; j++)
-                        {
-                            ref VoiceUpdateState voiceUpdateState = ref voiceUpdateStates[j].Span[0];
-
-                            if (voiceUpdateState.IsWaveBufferValid[i])
-                            {
-                                voiceUpdateState.WaveBufferIndex = (voiceUpdateState.WaveBufferIndex + 1) % RendererConstants.VoiceWaveBufferCount;
-                                voiceUpdateState.WaveBufferConsumed++;
-                            }
-
-                            voiceUpdateState.IsWaveBufferValid[i] = false;
-                        }
-                    }
-
-                    for (int i = 0; i < ChannelsCount; i++)
-                    {
-                        ref VoiceUpdateState voiceUpdateState = ref voiceUpdateStates[i].Span[0];
-
-                        voiceUpdateState.Offset = 0;
-                        voiceUpdateState.PlayedSampleCount = 0;
-                        voiceUpdateState.Pitch.ToSpan().Fill(0);
-                        voiceUpdateState.Fraction = 0;
-                        voiceUpdateState.LoopContext = new Dsp.State.AdpcmLoopContext();
-                    }
-
-                    PlayState = Types.PlayState.Stopped;
-                    WasPlaying = PreviousPlayState == Types.PlayState.Started;
-
-                    return WasPlaying;
-
-                case Types.PlayState.Stopped:
-                case Types.PlayState.Paused:
-                    foreach (ref WaveBuffer wavebuffer in WaveBuffers.ToSpan())
-                    {
-                        wavebuffer.BufferAddressInfo.GetReference(true);
-                        wavebuffer.ContextAddressInfo.GetReference(true);
-                    }
-
-                    if (SampleFormat == SampleFormat.Adpcm)
-                    {
-                        if (DataSourceStateAddressInfo.CpuAddress != 0)
-                        {
-                            DataSourceStateAddressInfo.GetReference(true);
-                        }
-                    }
-
-                    WasPlaying = PreviousPlayState == Types.PlayState.Started;
-
-                    return WasPlaying;
-                default:
-                    throw new NotImplementedException($"{PlayState}");
-            }
-        }
-
-        /// <summary>
-        /// Update the internal state for command generation.
-        /// </summary>
-        /// <param name="context">The voice context.</param>
-        /// <returns>Return true if this voice should be played.</returns>
-        public bool UpdateForCommandGeneration(VoiceContext context)
-        {
-            if (IsNew)
-            {
-                ResetResources(context);
-                PreviousVolume = Volume;
-                IsNew = false;
-            }
-
-            Memory<VoiceUpdateState>[] voiceUpdateStates = new Memory<VoiceUpdateState>[RendererConstants.VoiceChannelCountMax];
-
-            for (int i = 0; i < ChannelsCount; i++)
-            {
-                voiceUpdateStates[i] = context.GetUpdateStateForDsp(ChannelResourceIds[i]);
-            }
-
-            return UpdateParametersForCommandGeneration(voiceUpdateStates);
-        }
-    }
-}
diff --git a/Ryujinx.Audio.Renderer/Server/Voice/WaveBuffer.cs b/Ryujinx.Audio.Renderer/Server/Voice/WaveBuffer.cs
deleted file mode 100644
index a03aa757..00000000
--- a/Ryujinx.Audio.Renderer/Server/Voice/WaveBuffer.cs
+++ /dev/null
@@ -1,121 +0,0 @@
-//
-// 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.Server.MemoryPool;
-using System.Runtime.InteropServices;
-
-namespace Ryujinx.Audio.Renderer.Server.Voice
-{
-    /// <summary>
-    /// A wavebuffer used for server update.
-    /// </summary>
-    [StructLayout(LayoutKind.Sequential, Size = 0x58, Pack = 1)]
-    public struct WaveBuffer
-    {
-        /// <summary>
-        /// The <see cref="AddressInfo"/> of the sample data of the wavebuffer.
-        /// </summary>
-        public AddressInfo BufferAddressInfo;
-
-        /// <summary>
-        /// The <see cref="AddressInfo"/> of the context of the wavebuffer.
-        /// </summary>
-        /// <remarks>Only used by <see cref="Common.SampleFormat.Adpcm"/>.</remarks>
-        public AddressInfo ContextAddressInfo;
-
-
-        /// <summary>
-        /// First sample to play of the wavebuffer.
-        /// </summary>
-        public uint StartSampleOffset;
-
-        /// <summary>
-        /// Last sample to play of the wavebuffer.
-        /// </summary>
-        public uint EndSampleOffset;
-
-        /// <summary>
-        /// Set to true if the wavebuffer is looping.
-        /// </summary>
-        [MarshalAs(UnmanagedType.I1)]
-        public bool ShouldLoop;
-
-        /// <summary>
-        /// Set to true if the wavebuffer is the end of stream.
-        /// </summary>
-        [MarshalAs(UnmanagedType.I1)]
-        public bool IsEndOfStream;
-
-        /// <summary>
-        /// Set to true if the wavebuffer wasn't sent to the <see cref="Dsp.AudioProcessor"/>.
-        /// </summary>
-        [MarshalAs(UnmanagedType.I1)]
-        public bool IsSendToAudioProcessor;
-
-        /// <summary>
-        /// First sample to play when looping the wavebuffer.
-        /// </summary>
-        public uint LoopStartSampleOffset;
-
-        /// <summary>
-        /// Last sample to play when looping the wavebuffer.
-        /// </summary>
-        public uint LoopEndSampleOffset;
-
-        /// <summary>
-        /// The max loop count.
-        /// </summary>
-        public int LoopCount;
-
-        /// <summary>
-        /// Create a new <see cref="Common.WaveBuffer"/> for use by the <see cref="Dsp.AudioProcessor"/>.
-        /// </summary>
-        /// <param name="version">The target version of the wavebuffer.</param>
-        /// <returns>A new <see cref="Common.WaveBuffer"/> for use by the <see cref="Dsp.AudioProcessor"/>.</returns>
-        public Common.WaveBuffer ToCommon(int version)
-        {
-            Common.WaveBuffer waveBuffer = new Common.WaveBuffer();
-
-            waveBuffer.Buffer = BufferAddressInfo.GetReference(true);
-            waveBuffer.BufferSize = (uint)BufferAddressInfo.Size;
-
-            if (ContextAddressInfo.CpuAddress != 0)
-            {
-                waveBuffer.Context = ContextAddressInfo.GetReference(true);
-                waveBuffer.ContextSize = (uint)ContextAddressInfo.Size;
-            }
-
-            waveBuffer.StartSampleOffset = StartSampleOffset;
-            waveBuffer.EndSampleOffset = EndSampleOffset;
-            waveBuffer.Looping = ShouldLoop;
-            waveBuffer.IsEndOfStream = IsEndOfStream;
-
-            if (version == 2)
-            {
-                waveBuffer.LoopCount = LoopCount;
-                waveBuffer.LoopStartSampleOffset = LoopStartSampleOffset;
-                waveBuffer.LoopEndSampleOffset = LoopEndSampleOffset;
-            }
-            else
-            {
-                waveBuffer.LoopCount = -1;
-            }
-
-            return waveBuffer;
-        }
-    }
-}