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/AudioRenderer/AalHardwareDevice.cs

@@ -1,98 +0,0 @@
-using Ryujinx.Audio;
-using Ryujinx.Audio.Renderer;
-using Ryujinx.Audio.Renderer.Integration;
-using System;
-using System.Collections.Generic;
-using System.Threading;
-
-namespace Ryujinx.HLE.HOS.Services.Audio.AudioRenderer
-{
-    public class AalHardwareDevice : HardwareDevice
-    {
-        private IAalOutput _output;
-        private int _trackId;
-        private int _bufferTag;
-        private int _nextTag;
-        private AutoResetEvent _releaseEvent;
-
-        private uint _channelCount;
-        private uint _sampleRate;
-
-        private short[] _buffer;
-
-        private Queue<long> _releasedTags;
-
-        public AalHardwareDevice(int bufferTag, IAalOutput output, uint channelCount, uint sampleRate)
-        {
-            _bufferTag = bufferTag;
-            _channelCount = channelCount;
-            _sampleRate = sampleRate;
-            _output = output;
-            _releaseEvent = new AutoResetEvent(true);
-            _trackId = _output.OpenTrack((int)sampleRate, (int)channelCount, AudioCallback);
-            _releasedTags = new Queue<long>();
-
-            _buffer = new short[RendererConstants.TargetSampleCount * channelCount];
-
-            _output.Start(_trackId);
-        }
-
-        private void AudioCallback()
-        {
-            long[] released = _output.GetReleasedBuffers(_trackId, int.MaxValue);
-
-            lock (_releasedTags)
-            {
-                foreach (long tag in released)
-                {
-                    _releasedTags.Enqueue(tag);
-                }
-            }
-        }
-
-        private long GetReleasedTag()
-        {
-            lock (_releasedTags)
-            {
-                if (_releasedTags.Count > 0)
-                {
-                    return _releasedTags.Dequeue();
-                }
-
-                return (_bufferTag << 16) | (_nextTag++);
-            }
-        }
-
-        public void AppendBuffer(ReadOnlySpan<short> data, uint channelCount)
-        {
-            data.CopyTo(_buffer.AsSpan());
-
-            _output.AppendBuffer(_trackId, GetReleasedTag(), _buffer);
-        }
-
-        public uint GetChannelCount()
-        {
-            return _channelCount;
-        }
-
-        public uint GetSampleRate()
-        {
-            return _sampleRate;
-        }
-
-        public void Dispose()
-        {
-            Dispose(true);
-        }
-
-        protected virtual void Dispose(bool disposing)
-        {
-            if (disposing)
-            {
-                _output.Stop(_trackId);
-                _output.CloseTrack(_trackId);
-                _releaseEvent.Dispose();
-            }
-        }
-    }
-}

Ryujinx.HLE/HOS/Services/Audio/AudioRenderer/AudioKernelEvent.cs

@@ -1,4 +1,4 @@
-using Ryujinx.Audio.Renderer.Integration;
+using Ryujinx.Audio.Integration;
 using Ryujinx.HLE.HOS.Kernel.Threading;
 
 namespace Ryujinx.HLE.HOS.Services.Audio.AudioRenderer

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

@@ -1,4 +1,4 @@
-using Ryujinx.Audio.Renderer.Integration;
+using Ryujinx.Audio.Integration;
 using Ryujinx.Audio.Renderer.Server;
 using Ryujinx.HLE.HOS.Kernel.Threading;
 using System;