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

Ryujinx.HLE/HOS/Services/Audio/AudioOutManager.cs

@@ -0,0 +1,41 @@
+using Ryujinx.Audio.Common;
+using Ryujinx.Audio.Output;
+using Ryujinx.HLE.HOS.Services.Audio.AudioOut;
+
+using AudioOutManagerImpl = Ryujinx.Audio.Output.AudioOutputManager;
+
+namespace Ryujinx.HLE.HOS.Services.Audio
+{
+    class AudioOutManager : IAudioOutManager
+    {
+        private AudioOutManagerImpl _impl;
+
+        public AudioOutManager(AudioOutManagerImpl impl)
+        {
+            _impl = impl;
+        }
+
+        public string[] ListAudioOuts()
+        {
+            return _impl.ListAudioOuts();
+        }
+
+        public ResultCode OpenAudioOut(ServiceCtx context, out string outputDeviceName, out AudioOutputConfiguration outputConfiguration, out IAudioOut obj, string inputDeviceName, ref AudioInputConfiguration parameter, ulong appletResourceUserId, uint processHandle)
+        {
+            var memoryManager = context.Process.HandleTable.GetKProcess((int)processHandle).CpuMemory;
+
+            ResultCode result = (ResultCode)_impl.OpenAudioOut(out outputDeviceName, out outputConfiguration, out AudioOutputSystem outSystem, memoryManager, inputDeviceName, SampleFormat.PcmInt16, ref parameter, appletResourceUserId, processHandle);
+
+            if (result == ResultCode.Success)
+            {
+                obj = new AudioOut.AudioOut(outSystem, context.Device.System.KernelContext, processHandle);
+            }
+            else
+            {
+                obj = null;
+            }
+
+            return result;
+        }
+    }
+}