Refactoring HOS folder structure (#771)

* Refactoring HOS folder structure

Refactoring HOS folder structure:

- Added some subfolders when needed (Following structure decided in private).
- Added some `Types` folders when needed.
- Little cleanup here and there.
- Add services placeholders for every HOS services (close #766 and #753).

* Remove Types namespaces

2 files changed, 177 insertions, 0 deletions

diff --git a/Ryujinx.HLE/HOS/Services/Audio/AudioOutManager/IAudioOut.cs b/Ryujinx.HLE/HOS/Services/Audio/AudioOutManager/IAudioOut.cs
new file mode 100644
index 00000000..5b6983d6
--- /dev/null
+++ b/Ryujinx.HLE/HOS/Services/Audio/AudioOutManager/IAudioOut.cs
@@ -0,0 +1,163 @@
+using ARMeilleure.Memory;
+using Ryujinx.Audio;
+using Ryujinx.HLE.HOS.Ipc;
+using Ryujinx.HLE.HOS.Kernel.Common;
+using Ryujinx.HLE.HOS.Kernel.Threading;
+using System;
+
+namespace Ryujinx.HLE.HOS.Services.Audio.AudioOutManager
+{
+    class IAudioOut : IpcService, IDisposable
+    {
+        private IAalOutput _audioOut;
+        private KEvent     _releaseEvent;
+        private int        _track;
+
+        public IAudioOut(IAalOutput audioOut, KEvent releaseEvent, int track)
+        {
+            _audioOut     = audioOut;
+            _releaseEvent = releaseEvent;
+            _track        = track;
+        }
+
+        [Command(0)]
+        // GetAudioOutState() -> u32 state
+        public ResultCode GetAudioOutState(ServiceCtx context)
+        {
+            context.ResponseData.Write((int)_audioOut.GetState(_track));
+
+            return ResultCode.Success;
+        }
+
+        [Command(1)]
+        // StartAudioOut()
+        public ResultCode StartAudioOut(ServiceCtx context)
+        {
+            _audioOut.Start(_track);
+
+            return ResultCode.Success;
+        }
+
+        [Command(2)]
+        // StopAudioOut()
+        public ResultCode StopAudioOut(ServiceCtx context)
+        {
+            _audioOut.Stop(_track);
+
+            return ResultCode.Success;
+        }
+
+        [Command(3)]
+        // AppendAudioOutBuffer(u64 tag, buffer<nn::audio::AudioOutBuffer, 5>)
+        public ResultCode AppendAudioOutBuffer(ServiceCtx context)
+        {
+            return AppendAudioOutBufferImpl(context, context.Request.SendBuff[0].Position);
+        }
+
+        [Command(4)]
+        // RegisterBufferEvent() -> handle<copy>
+        public ResultCode RegisterBufferEvent(ServiceCtx context)
+        {
+            if (context.Process.HandleTable.GenerateHandle(_releaseEvent.ReadableEvent, out int handle) != KernelResult.Success)
+            {
+                throw new InvalidOperationException("Out of handles!");
+            }
+
+            context.Response.HandleDesc = IpcHandleDesc.MakeCopy(handle);
+
+            return ResultCode.Success;
+        }
+
+        [Command(5)]
+        // GetReleasedAudioOutBuffer() -> (u32 count, buffer<nn::audio::AudioOutBuffer, 6>)
+        public ResultCode GetReleasedAudioOutBuffer(ServiceCtx context)
+        {
+            long position = context.Request.ReceiveBuff[0].Position;
+            long size     = context.Request.ReceiveBuff[0].Size;
+
+            return GetReleasedAudioOutBufferImpl(context, position, size);
+        }
+
+        [Command(6)]
+        // ContainsAudioOutBuffer(u64 tag) -> b8
+        public ResultCode ContainsAudioOutBuffer(ServiceCtx context)
+        {
+            long tag = context.RequestData.ReadInt64();
+
+            context.ResponseData.Write(_audioOut.ContainsBuffer(_track, tag) ? 1 : 0);
+
+            return 0;
+        }
+
+        [Command(7)] // 3.0.0+
+        // AppendAudioOutBufferAuto(u64 tag, buffer<nn::audio::AudioOutBuffer, 0x21>)
+        public ResultCode AppendAudioOutBufferAuto(ServiceCtx context)
+        {
+            (long position, long size) = context.Request.GetBufferType0x21();
+
+            return AppendAudioOutBufferImpl(context, position);
+        }
+
+        public ResultCode AppendAudioOutBufferImpl(ServiceCtx context, long position)
+        {
+            long tag = context.RequestData.ReadInt64();
+
+            AudioOutData data = MemoryHelper.Read<AudioOutData>(
+                context.Memory,
+                position);
+
+            byte[] buffer = context.Memory.ReadBytes(
+                data.SampleBufferPtr,
+                data.SampleBufferSize);
+
+            _audioOut.AppendBuffer(_track, tag, buffer);
+
+            return ResultCode.Success;
+        }
+
+        [Command(8)] // 3.0.0+
+        // GetReleasedAudioOutBufferAuto() -> (u32 count, buffer<nn::audio::AudioOutBuffer, 0x22>)
+        public ResultCode GetReleasedAudioOutBufferAuto(ServiceCtx context)
+        {
+            (long position, long size) = context.Request.GetBufferType0x22();
+
+            return GetReleasedAudioOutBufferImpl(context, position, size);
+        }
+
+        public ResultCode GetReleasedAudioOutBufferImpl(ServiceCtx context, long position, long size)
+        {
+            uint count = (uint)((ulong)size >> 3);
+
+            long[] releasedBuffers = _audioOut.GetReleasedBuffers(_track, (int)count);
+
+            for (uint index = 0; index < count; index++)
+            {
+                long tag = 0;
+
+                if (index < releasedBuffers.Length)
+                {
+                    tag = releasedBuffers[index];
+                }
+
+                context.Memory.WriteInt64(position + index * 8, tag);
+            }
+
+            context.ResponseData.Write(releasedBuffers.Length);
+
+            return ResultCode.Success;
+        }
+
+        public void Dispose()
+        {
+            Dispose(true);
+        }
+
+        protected virtual void Dispose(bool disposing)
+        {
+            if (disposing)
+            {
+                _audioOut.CloseTrack(_track);
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/Ryujinx.HLE/HOS/Services/Audio/AudioOutManager/Types/AudioOutData.cs b/Ryujinx.HLE/HOS/Services/Audio/AudioOutManager/Types/AudioOutData.cs
new file mode 100644
index 00000000..2598d0f8
--- /dev/null
+++ b/Ryujinx.HLE/HOS/Services/Audio/AudioOutManager/Types/AudioOutData.cs
@@ -0,0 +1,14 @@
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Audio.AudioOutManager
+{
+    [StructLayout(LayoutKind.Sequential)]
+    struct AudioOutData
+    {
+        public long NextBufferPtr;
+        public long SampleBufferPtr;
+        public long SampleBufferCapacity;
+        public long SampleBufferSize;
+        public long SampleBufferInnerOffset;
+    }
+}
\ No newline at end of file