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.Audio.Renderer/Common/WaveBuffer.cs

@@ -1,99 +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 System.Runtime.InteropServices;
-
-using DspAddr = System.UInt64;
-
-namespace Ryujinx.Audio.Renderer.Common
-{
-    /// <summary>
-    /// A wavebuffer used for data source commands.
-    /// </summary>
-    [StructLayout(LayoutKind.Sequential, Pack = 1)]
-    public struct WaveBuffer
-    {
-        /// <summary>
-        /// The DSP address of the sample data of the wavebuffer.
-        /// </summary>
-        public DspAddr Buffer;
-
-        /// <summary>
-        /// The DSP address of the context of the wavebuffer.
-        /// </summary>
-        /// <remarks>Only used by <see cref="SampleFormat.Adpcm"/>.</remarks>
-        public DspAddr Context;
-
-        /// <summary>
-        /// The size of the sample buffer data.
-        /// </summary>
-        public uint BufferSize;
-
-        /// <summary>
-        /// The size of the context buffer.
-        /// </summary>
-        public uint ContextSize;
-
-        /// <summary>
-        /// First sample to play on the wavebuffer.
-        /// </summary>
-        public uint StartSampleOffset;
-
-        /// <summary>
-        /// Last sample to play on the wavebuffer.
-        /// </summary>
-        public uint EndSampleOffset;
-
-        /// <summary>
-        /// First sample to play when looping the wavebuffer.
-        /// </summary>
-        /// <remarks>
-        /// If <see cref="LoopStartSampleOffset"/> or <see cref="LoopEndSampleOffset"/> is equal to zero,, it will default to <see cref="StartSampleOffset"/> and <see cref="EndSampleOffset"/>.
-        /// </remarks>
-        public uint LoopStartSampleOffset;
-
-        /// <summary>
-        /// Last sample to play when looping the wavebuffer.
-        /// </summary>
-        /// <remarks>
-        /// If <see cref="LoopStartSampleOffset"/> or <see cref="LoopEndSampleOffset"/> is equal to zero, it will default to <see cref="StartSampleOffset"/> and <see cref="EndSampleOffset"/>.
-        /// </remarks>
-        public uint LoopEndSampleOffset;
-
-        /// <summary>
-        /// The max loop count.
-        /// </summary>
-        public int LoopCount;
-
-        /// <summary>
-        /// Set to true if the wavebuffer is looping.
-        /// </summary>
-        [MarshalAs(UnmanagedType.I1)]
-        public bool Looping;
-
-        /// <summary>
-        /// Set to true if the wavebuffer is the end of stream.
-        /// </summary>
-        [MarshalAs(UnmanagedType.I1)]
-        public bool IsEndOfStream;
-
-        /// <summary>
-        /// Padding/Reserved.
-        /// </summary>
-        private ushort _padding;
-    }
-}