Refactoring commands handling (#728)

* Refactoring commands handling

- Use Reflection to handle commands ID.
- Add all symbols (from SwIPC so not all time accurate).
- Re-sort some services commands methods.
- Some cleanup.
- Keep some empty constructor for consistency.

* Fix order in IProfile

7 files changed, 105 insertions, 142 deletions

diff --git a/Ryujinx.HLE/HOS/Services/Aud/AudioOut/IAudioOut.cs b/Ryujinx.HLE/HOS/Services/Aud/AudioOut/IAudioOut.cs
index 5270a041..1c078fba 100644
--- a/Ryujinx.HLE/HOS/Services/Aud/AudioOut/IAudioOut.cs
+++ b/Ryujinx.HLE/HOS/Services/Aud/AudioOut/IAudioOut.cs
@@ -4,42 +4,24 @@ using Ryujinx.HLE.HOS.Ipc;
 using Ryujinx.HLE.HOS.Kernel.Common;
 using Ryujinx.HLE.HOS.Kernel.Threading;
 using System;
-using System.Collections.Generic;
 
 namespace Ryujinx.HLE.HOS.Services.Aud.AudioOut
 {
     class IAudioOut : IpcService, IDisposable
     {
-        private Dictionary<int, ServiceProcessRequest> _commands;
-
-        public override IReadOnlyDictionary<int, ServiceProcessRequest> Commands => _commands;
-
         private IAalOutput _audioOut;
-
-        private KEvent _releaseEvent;
-
-        private int _track;
+        private KEvent     _releaseEvent;
+        private int        _track;
 
         public IAudioOut(IAalOutput audioOut, KEvent releaseEvent, int track)
         {
-            _commands = new Dictionary<int, ServiceProcessRequest>
-            {
-                { 0, GetAudioOutState              },
-                { 1, StartAudioOut                 },
-                { 2, StopAudioOut                  },
-                { 3, AppendAudioOutBuffer          },
-                { 4, RegisterBufferEvent           },
-                { 5, GetReleasedAudioOutBuffer     },
-                { 6, ContainsAudioOutBuffer        },
-                { 7, AppendAudioOutBufferAuto      },
-                { 8, GetReleasedAudioOutBufferAuto }
-            };
-
             _audioOut     = audioOut;
             _releaseEvent = releaseEvent;
             _track        = track;
         }
 
+        [Command(0)]
+        // GetAudioOutState() -> u32 state
         public long GetAudioOutState(ServiceCtx context)
         {
             context.ResponseData.Write((int)_audioOut.GetState(_track));
@@ -47,6 +29,8 @@ namespace Ryujinx.HLE.HOS.Services.Aud.AudioOut
             return 0;
         }
 
+        [Command(1)]
+        // StartAudioOut()
         public long StartAudioOut(ServiceCtx context)
         {
             _audioOut.Start(_track);
@@ -54,6 +38,8 @@ namespace Ryujinx.HLE.HOS.Services.Aud.AudioOut
             return 0;
         }
 
+        [Command(2)]
+        // StopAudioOut()
         public long StopAudioOut(ServiceCtx context)
         {
             _audioOut.Stop(_track);
@@ -61,11 +47,15 @@ namespace Ryujinx.HLE.HOS.Services.Aud.AudioOut
             return 0;
         }
 
+        [Command(3)]
+        // AppendAudioOutBuffer(u64 tag, buffer<nn::audio::AudioOutBuffer, 5>)
         public long AppendAudioOutBuffer(ServiceCtx context)
         {
             return AppendAudioOutBufferImpl(context, context.Request.SendBuff[0].Position);
         }
 
+        [Command(4)]
+        // RegisterBufferEvent() -> handle<copy>
         public long RegisterBufferEvent(ServiceCtx context)
         {
             if (context.Process.HandleTable.GenerateHandle(_releaseEvent.ReadableEvent, out int handle) != KernelResult.Success)
@@ -78,6 +68,8 @@ namespace Ryujinx.HLE.HOS.Services.Aud.AudioOut
             return 0;
         }
 
+        [Command(5)]
+        // GetReleasedAudioOutBuffer() -> (u32 count, buffer<nn::audio::AudioOutBuffer, 6>)
         public long GetReleasedAudioOutBuffer(ServiceCtx context)
         {
             long position = context.Request.ReceiveBuff[0].Position;
@@ -86,6 +78,8 @@ namespace Ryujinx.HLE.HOS.Services.Aud.AudioOut
             return GetReleasedAudioOutBufferImpl(context, position, size);
         }
 
+        [Command(6)]
+        // ContainsAudioOutBuffer(u64 tag) -> b8
         public long ContainsAudioOutBuffer(ServiceCtx context)
         {
             long tag = context.RequestData.ReadInt64();
@@ -95,6 +89,8 @@ namespace Ryujinx.HLE.HOS.Services.Aud.AudioOut
             return 0;
         }
 
+        [Command(7)] // 3.0.0+
+        // AppendAudioOutBufferAuto(u64 tag, buffer<nn::audio::AudioOutBuffer, 0x21>)
         public long AppendAudioOutBufferAuto(ServiceCtx context)
         {
             (long position, long size) = context.Request.GetBufferType0x21();
@@ -119,6 +115,8 @@ namespace Ryujinx.HLE.HOS.Services.Aud.AudioOut
             return 0;
         }
 
+        [Command(8)] // 3.0.0+
+        // GetReleasedAudioOutBufferAuto() -> (u32 count, buffer<nn::audio::AudioOutBuffer, 0x22>)
         public long GetReleasedAudioOutBufferAuto(ServiceCtx context)
         {
             (long position, long size) = context.Request.GetBufferType0x22();
@@ -162,4 +160,4 @@ namespace Ryujinx.HLE.HOS.Services.Aud.AudioOut
             }
         }
     }
-}
+}
\ No newline at end of file
diff --git a/Ryujinx.HLE/HOS/Services/Aud/AudioRenderer/IAudioRenderer.cs b/Ryujinx.HLE/HOS/Services/Aud/AudioRenderer/IAudioRenderer.cs
index 2fbb041a..e01e4520 100644
--- a/Ryujinx.HLE/HOS/Services/Aud/AudioRenderer/IAudioRenderer.cs
+++ b/Ryujinx.HLE/HOS/Services/Aud/AudioRenderer/IAudioRenderer.cs
@@ -7,7 +7,6 @@ using Ryujinx.HLE.HOS.Kernel.Common;
 using Ryujinx.HLE.HOS.Kernel.Threading;
 using Ryujinx.HLE.Utilities;
 using System;
-using System.Collections.Generic;
 using System.Runtime.InteropServices;
 using System.Runtime.Intrinsics;
 using System.Runtime.Intrinsics.X86;
@@ -23,10 +22,6 @@ namespace Ryujinx.HLE.HOS.Services.Aud.AudioRenderer
         // high latency).
         private const int MixBufferSamplesCount = 960;
 
-        private Dictionary<int, ServiceProcessRequest> _commands;
-
-        public override IReadOnlyDictionary<int, ServiceProcessRequest> Commands => _commands;
-
         private KEvent _updateEvent;
 
         private MemoryManager _memory;
@@ -49,18 +44,6 @@ namespace Ryujinx.HLE.HOS.Services.Aud.AudioRenderer
             IAalOutput             audioOut,
             AudioRendererParameter Params)
         {
-            _commands = new Dictionary<int, ServiceProcessRequest>
-            {
-                { 0, GetSampleRate              },
-                { 1, GetSampleCount             },
-                { 2, GetMixBufferCount          },
-                { 3, GetState                   },
-                { 4, RequestUpdateAudioRenderer },
-                { 5, StartAudioRenderer         },
-                { 6, StopAudioRenderer          },
-                { 7, QuerySystemEvent           }
-            };
-
             _updateEvent = new KEvent(system);
 
             _memory   = memory;
@@ -81,7 +64,8 @@ namespace Ryujinx.HLE.HOS.Services.Aud.AudioRenderer
             _playState = PlayState.Stopped;
         }
 
-        //  GetSampleRate() -> u32
+        [Command(0)]
+        // GetSampleRate() -> u32
         public long GetSampleRate(ServiceCtx context)
         {
             context.ResponseData.Write(_params.SampleRate);
@@ -89,7 +73,8 @@ namespace Ryujinx.HLE.HOS.Services.Aud.AudioRenderer
             return 0;
         }
 
-        //  GetSampleCount() -> u32
+        [Command(1)]
+        // GetSampleCount() -> u32
         public long GetSampleCount(ServiceCtx context)
         {
             context.ResponseData.Write(_params.SampleCount);
@@ -97,6 +82,7 @@ namespace Ryujinx.HLE.HOS.Services.Aud.AudioRenderer
             return 0;
         }
 
+        [Command(2)]
         // GetMixBufferCount() -> u32
         public long GetMixBufferCount(ServiceCtx context)
         {
@@ -105,6 +91,7 @@ namespace Ryujinx.HLE.HOS.Services.Aud.AudioRenderer
             return 0;
         }
 
+        [Command(3)]
         // GetState() -> u32
         private long GetState(ServiceCtx context)
         {
@@ -141,6 +128,9 @@ namespace Ryujinx.HLE.HOS.Services.Aud.AudioRenderer
             _audioOut.Start(_track);
         }
 
+        [Command(4)]
+        // RequestUpdateAudioRenderer(buffer<nn::audio::detail::AudioRendererUpdateDataHeader, 5>)
+        // -> (buffer<nn::audio::detail::AudioRendererUpdateDataHeader, 6>, buffer<nn::audio::detail::AudioRendererUpdateDataHeader, 6>)
         public long RequestUpdateAudioRenderer(ServiceCtx context)
         {
             long outputPosition = context.Request.ReceiveBuff[0].Position;
@@ -247,6 +237,8 @@ namespace Ryujinx.HLE.HOS.Services.Aud.AudioRenderer
             return 0;
         }
 
+        [Command(5)]
+        // Start()
         public long StartAudioRenderer(ServiceCtx context)
         {
             Logger.PrintStub(LogClass.ServiceAudio);
@@ -256,6 +248,8 @@ namespace Ryujinx.HLE.HOS.Services.Aud.AudioRenderer
             return 0;
         }
 
+        [Command(6)]
+        // Stop()
         public long StopAudioRenderer(ServiceCtx context)
         {
             Logger.PrintStub(LogClass.ServiceAudio);
@@ -265,6 +259,8 @@ namespace Ryujinx.HLE.HOS.Services.Aud.AudioRenderer
             return 0;
         }
 
+        [Command(7)]
+        // QuerySystemEvent() -> handle<copy, event>
         public long QuerySystemEvent(ServiceCtx context)
         {
             if (context.Process.HandleTable.GenerateHandle(_updateEvent.ReadableEvent, out int handle) != KernelResult.Success)
@@ -405,4 +401,4 @@ namespace Ryujinx.HLE.HOS.Services.Aud.AudioRenderer
             }
         }
     }
-}
+}
\ No newline at end of file
diff --git a/Ryujinx.HLE/HOS/Services/Aud/IAudioDevice.cs b/Ryujinx.HLE/HOS/Services/Aud/IAudioDevice.cs
index d4946999..f6c0b9d8 100644
--- a/Ryujinx.HLE/HOS/Services/Aud/IAudioDevice.cs
+++ b/Ryujinx.HLE/HOS/Services/Aud/IAudioDevice.cs
@@ -4,42 +4,24 @@ using Ryujinx.HLE.HOS.Kernel.Common;
 using Ryujinx.HLE.HOS.Kernel.Threading;
 using Ryujinx.HLE.HOS.SystemState;
 using System;
-using System.Collections.Generic;
 using System.Text;
 
 namespace Ryujinx.HLE.HOS.Services.Aud
 {
     class IAudioDevice : IpcService
     {
-        private Dictionary<int, ServiceProcessRequest> _commands;
-
-        public override IReadOnlyDictionary<int, ServiceProcessRequest> Commands => _commands;
-
         private KEvent _systemEvent;
 
         public IAudioDevice(Horizon system)
         {
-            _commands = new Dictionary<int, ServiceProcessRequest>
-            {
-                { 0,  ListAudioDeviceName            },
-                { 1,  SetAudioDeviceOutputVolume     },
-                { 3,  GetActiveAudioDeviceName       },
-                { 4,  QueryAudioDeviceSystemEvent    },
-                { 5,  GetActiveChannelCount          },
-                { 6,  ListAudioDeviceNameAuto        },
-                { 7,  SetAudioDeviceOutputVolumeAuto },
-                { 8,  GetAudioDeviceOutputVolumeAuto },
-                { 10, GetActiveAudioDeviceNameAuto   },
-                { 11, QueryAudioDeviceInputEvent     },
-                { 12, QueryAudioDeviceOutputEvent    }
-            };
-
             _systemEvent = new KEvent(system);
 
             // TODO: We shouldn't be signaling this here.
             _systemEvent.ReadableEvent.Signal();
         }
 
+        [Command(0)]
+        // ListAudioDeviceName() -> (u32, buffer<bytes, 6>)
         public long ListAudioDeviceName(ServiceCtx context)
         {
             string[] deviceNames = SystemStateMgr.AudioOutputs;
@@ -70,6 +52,8 @@ namespace Ryujinx.HLE.HOS.Services.Aud
             return 0;
         }
 
+        [Command(1)]
+        // SetAudioDeviceOutputVolume(u32, buffer<bytes, 5>)
         public long SetAudioDeviceOutputVolume(ServiceCtx context)
         {
             float volume = context.RequestData.ReadSingle();
@@ -86,6 +70,8 @@ namespace Ryujinx.HLE.HOS.Services.Aud
             return 0;
         }
 
+        [Command(3)]
+        // GetActiveAudioDeviceName() -> buffer<bytes, 6>
         public long GetActiveAudioDeviceName(ServiceCtx context)
         {
             string name = context.Device.System.State.ActiveAudioOutput;
@@ -107,6 +93,8 @@ namespace Ryujinx.HLE.HOS.Services.Aud
             return 0;
         }
 
+        [Command(4)]
+        // QueryAudioDeviceSystemEvent() -> handle<copy, event>
         public long QueryAudioDeviceSystemEvent(ServiceCtx context)
         {
             if (context.Process.HandleTable.GenerateHandle(_systemEvent.ReadableEvent, out int handle) != KernelResult.Success)
@@ -121,6 +109,8 @@ namespace Ryujinx.HLE.HOS.Services.Aud
             return 0;
         }
 
+        [Command(5)]
+        // GetActiveChannelCount() -> u32
         public long GetActiveChannelCount(ServiceCtx context)
         {
             context.ResponseData.Write(2);
@@ -130,6 +120,8 @@ namespace Ryujinx.HLE.HOS.Services.Aud
             return 0;
         }
 
+        [Command(6)]
+        // ListAudioDeviceNameAuto() -> (u32, buffer<bytes, 0x22>)
         public long ListAudioDeviceNameAuto(ServiceCtx context)
         {
             string[] deviceNames = SystemStateMgr.AudioOutputs;
@@ -159,6 +151,8 @@ namespace Ryujinx.HLE.HOS.Services.Aud
             return 0;
         }
 
+        [Command(7)]
+        // SetAudioDeviceOutputVolumeAuto(u32, buffer<bytes, 0x21>)
         public long SetAudioDeviceOutputVolumeAuto(ServiceCtx context)
         {
             float volume = context.RequestData.ReadSingle();
@@ -174,6 +168,8 @@ namespace Ryujinx.HLE.HOS.Services.Aud
             return 0;
         }
 
+        [Command(8)]
+        // GetAudioDeviceOutputVolumeAuto(buffer<bytes, 0x21>) -> u32
         public long GetAudioDeviceOutputVolumeAuto(ServiceCtx context)
         {
             context.ResponseData.Write(1f);
@@ -183,6 +179,8 @@ namespace Ryujinx.HLE.HOS.Services.Aud
             return 0;
         }
 
+        [Command(10)]
+        // GetActiveAudioDeviceNameAuto() -> buffer<bytes, 0x22>
         public long GetActiveAudioDeviceNameAuto(ServiceCtx context)
         {
             string name = context.Device.System.State.ActiveAudioOutput;
@@ -203,6 +201,8 @@ namespace Ryujinx.HLE.HOS.Services.Aud
             return 0;
         }
 
+        [Command(11)]
+        // QueryAudioDeviceInputEvent() -> handle<copy, event>
         public long QueryAudioDeviceInputEvent(ServiceCtx context)
         {
             if (context.Process.HandleTable.GenerateHandle(_systemEvent.ReadableEvent, out int handle) != KernelResult.Success)
@@ -217,6 +217,8 @@ namespace Ryujinx.HLE.HOS.Services.Aud
             return 0;
         }
 
+        [Command(12)]
+        // QueryAudioDeviceOutputEvent() -> handle<copy, event>
         public long QueryAudioDeviceOutputEvent(ServiceCtx context)
         {
             if (context.Process.HandleTable.GenerateHandle(_systemEvent.ReadableEvent, out int handle) != KernelResult.Success)
@@ -231,4 +233,4 @@ namespace Ryujinx.HLE.HOS.Services.Aud
             return 0;
         }
     }
-}
+}
\ No newline at end of file
diff --git a/Ryujinx.HLE/HOS/Services/Aud/IAudioOutManager.cs b/Ryujinx.HLE/HOS/Services/Aud/IAudioOutManager.cs
index e4e037de..88d180fc 100644
--- a/Ryujinx.HLE/HOS/Services/Aud/IAudioOutManager.cs
+++ b/Ryujinx.HLE/HOS/Services/Aud/IAudioOutManager.cs
@@ -1,10 +1,8 @@
 using ChocolArm64.Memory;
 using Ryujinx.Audio;
 using Ryujinx.Common.Logging;
-using Ryujinx.HLE.HOS.Ipc;
 using Ryujinx.HLE.HOS.Kernel.Threading;
 using Ryujinx.HLE.HOS.Services.Aud.AudioOut;
-using System.Collections.Generic;
 using System.Text;
 
 using static Ryujinx.HLE.HOS.ErrorCode;
@@ -14,27 +12,14 @@ namespace Ryujinx.HLE.HOS.Services.Aud
     [Service("audout:u")]
     class IAudioOutManager : IpcService
     {
-        private const string DefaultAudioOutput = "DeviceOut";
+        private const string DefaultAudioOutput   = "DeviceOut";
+        private const int    DefaultSampleRate    = 48000;
+        private const int    DefaultChannelsCount = 2;
 
-        private const int DefaultSampleRate = 48000;
-
-        private const int DefaultChannelsCount = 2;
-
-        private Dictionary<int, ServiceProcessRequest> _commands;
-
-        public override IReadOnlyDictionary<int, ServiceProcessRequest> Commands => _commands;
-
-        public IAudioOutManager(ServiceCtx context)
-        {
-            _commands = new Dictionary<int, ServiceProcessRequest>
-            {
-                { 0, ListAudioOuts     },
-                { 1, OpenAudioOut      },
-                { 2, ListAudioOutsAuto },
-                { 3, OpenAudioOutAuto  }
-            };
-        }
+        public IAudioOutManager(ServiceCtx context) { }
 
+        [Command(0)]
+        // ListAudioOuts() -> (u32 count, buffer<bytes, 6>)
         public long ListAudioOuts(ServiceCtx context)
         {
             return ListAudioOutsImpl(
@@ -43,6 +28,9 @@ namespace Ryujinx.HLE.HOS.Services.Aud
                 context.Request.ReceiveBuff[0].Size);
         }
 
+        [Command(1)]
+        // OpenAudioOut(u32 sample_rate, u16 unused, u16 channel_count, nn::applet::AppletResourceUserId, pid, handle<copy, process>, buffer<bytes, 5> name_in)
+        // -> (u32 sample_rate, u32 channel_count, u32 pcm_format, u32, object<nn::audio::detail::IAudioOut>, buffer<bytes, 6> name_out)
         public long OpenAudioOut(ServiceCtx context)
         {
             return OpenAudioOutImpl(
@@ -53,6 +41,8 @@ namespace Ryujinx.HLE.HOS.Services.Aud
                 context.Request.ReceiveBuff[0].Size);
         }
 
+        [Command(2)] // 3.0.0+
+        // ListAudioOutsAuto() -> (u32 count, buffer<bytes, 0x22>)
         public long ListAudioOutsAuto(ServiceCtx context)
         {
             (long recvPosition, long recvSize) = context.Request.GetBufferType0x22();
@@ -60,6 +50,9 @@ namespace Ryujinx.HLE.HOS.Services.Aud
             return ListAudioOutsImpl(context, recvPosition, recvSize);
         }
 
+        [Command(3)] // 3.0.0+
+        // OpenAudioOutAuto(u32 sample_rate, u16 unused, u16 channel_count, nn::applet::AppletResourceUserId, pid, handle<copy, process>, buffer<bytes, 0x21>)
+        // -> (u32 sample_rate, u32 channel_count, u32 pcm_format, u32, object<nn::audio::detail::IAudioOut>, buffer<bytes, 0x22> name_out)
         public long OpenAudioOutAuto(ServiceCtx context)
         {
             (long sendPosition, long sendSize) = context.Request.GetBufferType0x21();
@@ -168,4 +161,4 @@ namespace Ryujinx.HLE.HOS.Services.Aud
             return 0;
         }
     }
-}
+}
\ No newline at end of file
diff --git a/Ryujinx.HLE/HOS/Services/Aud/IAudioRendererManager.cs b/Ryujinx.HLE/HOS/Services/Aud/IAudioRendererManager.cs
index c757d5fd..812617d6 100644
--- a/Ryujinx.HLE/HOS/Services/Aud/IAudioRendererManager.cs
+++ b/Ryujinx.HLE/HOS/Services/Aud/IAudioRendererManager.cs
@@ -1,9 +1,7 @@
 using Ryujinx.Audio;
 using Ryujinx.Common.Logging;
-using Ryujinx.HLE.HOS.Ipc;
 using Ryujinx.HLE.HOS.Services.Aud.AudioRenderer;
 using Ryujinx.HLE.Utilities;
-using System.Collections.Generic;
 
 using static Ryujinx.HLE.HOS.ErrorCode;
 
@@ -21,21 +19,11 @@ namespace Ryujinx.HLE.HOS.Services.Aud
 
         public const int RevMagic = Rev0Magic + (Rev << 24);
 
-        private Dictionary<int, ServiceProcessRequest> _commands;
-
-        public override IReadOnlyDictionary<int, ServiceProcessRequest> Commands => _commands;
-
-        public IAudioRendererManager(ServiceCtx context)
-        {
-            _commands = new Dictionary<int, ServiceProcessRequest>
-            {
-                { 0, OpenAudioRenderer                     },
-                { 1, GetAudioRendererWorkBufferSize        },
-                { 2, GetAudioDeviceService                 },
-                { 4, GetAudioDeviceServiceWithRevisionInfo }
-            };
-        }
+        public IAudioRendererManager(ServiceCtx context) { }
 
+        [Command(0)]
+        // OpenAudioRenderer(nn::audio::detail::AudioRendererParameterInternal, u64, nn::applet::AppletResourceUserId, pid, handle<copy>, handle<copy>)
+        // -> object<nn::audio::detail::IAudioRenderer>
         public long OpenAudioRenderer(ServiceCtx context)
         {
             IAalOutput audioOut = context.Device.AudioOut;
@@ -51,6 +39,8 @@ namespace Ryujinx.HLE.HOS.Services.Aud
             return 0;
         }
 
+        [Command(1)]
+        // GetWorkBufferSize(nn::audio::detail::AudioRendererParameterInternal) -> u64
         public long GetAudioRendererWorkBufferSize(ServiceCtx context)
         {
             AudioRendererParameter Params = GetAudioRendererParameter(context);
@@ -178,6 +168,7 @@ namespace Ryujinx.HLE.HOS.Services.Aud
             return result / 8;
         }
 
+        [Command(2)]
         // GetAudioDeviceService(nn::applet::AppletResourceUserId) -> object<nn::audio::detail::IAudioDevice>
         public long GetAudioDeviceService(ServiceCtx context)
         {
@@ -188,6 +179,7 @@ namespace Ryujinx.HLE.HOS.Services.Aud
             return 0;
         }
 
+        [Command(4)] // 4.0.0+
         // GetAudioDeviceServiceWithRevisionInfo(nn::applet::AppletResourceUserId, u32) -> object<nn::audio::detail::IAudioDevice>
         private long GetAudioDeviceServiceWithRevisionInfo(ServiceCtx context)
         {
diff --git a/Ryujinx.HLE/HOS/Services/Aud/IHardwareOpusDecoder.cs b/Ryujinx.HLE/HOS/Services/Aud/IHardwareOpusDecoder.cs
index 68b02bcc..1c48cfe2 100644
--- a/Ryujinx.HLE/HOS/Services/Aud/IHardwareOpusDecoder.cs
+++ b/Ryujinx.HLE/HOS/Services/Aud/IHardwareOpusDecoder.cs
@@ -1,6 +1,4 @@
 using Concentus.Structs;
-using Ryujinx.HLE.HOS.Ipc;
-using System.Collections.Generic;
 
 using static Ryujinx.HLE.HOS.ErrorCode;
 
@@ -10,10 +8,6 @@ namespace Ryujinx.HLE.HOS.Services.Aud
     {
         private const int FixedSampleRate = 48000;
 
-        private Dictionary<int, ServiceProcessRequest> _commands;
-
-        public override IReadOnlyDictionary<int, ServiceProcessRequest> Commands => _commands;
-
         private int _sampleRate;
         private int _channelsCount;
 
@@ -21,29 +15,14 @@ namespace Ryujinx.HLE.HOS.Services.Aud
 
         public IHardwareOpusDecoder(int sampleRate, int channelsCount)
         {
-            _commands = new Dictionary<int, ServiceProcessRequest>
-            {
-                { 0, DecodeInterleaved         },
-                { 4, DecodeInterleavedWithPerf }
-            };
-
             _sampleRate    = sampleRate;
             _channelsCount = channelsCount;
 
             _decoder = new OpusDecoder(FixedSampleRate, channelsCount);
         }
 
-        public long DecodeInterleavedWithPerf(ServiceCtx context)
-        {
-            long result = DecodeInterleaved(context);
-
-            // TODO: Figure out what this value is.
-            // According to switchbrew, it is now used.
-            context.ResponseData.Write(0L);
-
-            return result;
-        }
-
+        [Command(0)]
+        // DecodeInterleaved(buffer<unknown, 5>) -> (u32, u32, buffer<unknown, 6>)
         public long DecodeInterleaved(ServiceCtx context)
         {
             long inPosition = context.Request.SendBuff[0].Position;
@@ -87,5 +66,18 @@ namespace Ryujinx.HLE.HOS.Services.Aud
 
             return 0;
         }
+
+        [Command(4)]
+        // DecodeInterleavedWithPerf(buffer<unknown, 5>) -> (u32, u32, u64, buffer<unknown, 0x46>)
+        public long DecodeInterleavedWithPerf(ServiceCtx context)
+        {
+            long result = DecodeInterleaved(context);
+
+            // TODO: Figure out what this value is.
+            // According to switchbrew, it is now used.
+            context.ResponseData.Write(0L);
+
+            return result;
+        }
     }
-}
+}
\ No newline at end of file
diff --git a/Ryujinx.HLE/HOS/Services/Aud/IHardwareOpusDecoderManager.cs b/Ryujinx.HLE/HOS/Services/Aud/IHardwareOpusDecoderManager.cs
index e66a9fe6..2724fb29 100644
--- a/Ryujinx.HLE/HOS/Services/Aud/IHardwareOpusDecoderManager.cs
+++ b/Ryujinx.HLE/HOS/Services/Aud/IHardwareOpusDecoderManager.cs
@@ -1,24 +1,12 @@
-using Ryujinx.HLE.HOS.Ipc;
-using System.Collections.Generic;
-
 namespace Ryujinx.HLE.HOS.Services.Aud
 {
     [Service("hwopus")]
     class IHardwareOpusDecoderManager : IpcService
     {
-        private Dictionary<int, ServiceProcessRequest> _commands;
-
-        public override IReadOnlyDictionary<int, ServiceProcessRequest> Commands => _commands;
-
-        public IHardwareOpusDecoderManager(ServiceCtx context)
-        {
-            _commands = new Dictionary<int, ServiceProcessRequest>
-            {
-                { 0, Initialize        },
-                { 1, GetWorkBufferSize }
-            };
-        }
+        public IHardwareOpusDecoderManager(ServiceCtx context) { }
 
+        [Command(0)]
+        // Initialize(bytes<8, 4>, u32, handle<copy>) -> object<nn::codec::detail::IHardwareOpusDecoder>
         public long Initialize(ServiceCtx context)
         {
             int sampleRate    = context.RequestData.ReadInt32();
@@ -29,6 +17,8 @@ namespace Ryujinx.HLE.HOS.Services.Aud
             return 0;
         }
 
+        [Command(1)]
+        // GetWorkBufferSize(bytes<8, 4>) -> u32
         public long GetWorkBufferSize(ServiceCtx context)
         {
             // Note: The sample rate is ignored because it is fixed to 48KHz.
@@ -70,4 +60,4 @@ namespace Ryujinx.HLE.HOS.Services.Aud
                     celtSigSize;
         }
     }
-}
+}
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