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

1 files changed, 0 insertions, 210 deletions

diff --git a/Ryujinx.Audio.Renderer/Server/Splitter/SplitterDestination.cs b/Ryujinx.Audio.Renderer/Server/Splitter/SplitterDestination.cs
deleted file mode 100644
index 6d273e45..00000000
--- a/Ryujinx.Audio.Renderer/Server/Splitter/SplitterDestination.cs
+++ /dev/null
@@ -1,210 +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 Ryujinx.Audio.Renderer.Parameter;
-using Ryujinx.Common.Utilities;
-using System;
-using System.Diagnostics;
-using System.Runtime.InteropServices;
-
-namespace Ryujinx.Audio.Renderer.Server.Splitter
-{
-    /// <summary>
-    /// Server state for a splitter destination.
-    /// </summary>
-    [StructLayout(LayoutKind.Sequential, Size = 0xE0, Pack = Alignment)]
-    public struct SplitterDestination
-    {
-        public const int Alignment = 0x10;
-
-        /// <summary>
-        /// The unique id of this <see cref="SplitterDestination"/>.
-        /// </summary>
-        public int Id;
-
-        /// <summary>
-        /// The mix to output the result of the splitter.
-        /// </summary>
-        public int DestinationId;
-
-        /// <summary>
-        /// Mix buffer volumes storage.
-        /// </summary>
-        private MixArray _mix;
-        private MixArray _previousMix;
-
-        /// <summary>
-        /// Pointer to the next linked element.
-        /// </summary>
-        private unsafe SplitterDestination* _next;
-
-        /// <summary>
-        /// Set to true if in use.
-        /// </summary>
-        [MarshalAs(UnmanagedType.I1)]
-        public bool IsUsed;
-
-        /// <summary>
-        /// Set to true if the internal state need to be updated.
-        /// </summary>
-        [MarshalAs(UnmanagedType.I1)]
-        public bool NeedToUpdateInternalState;
-
-        [StructLayout(LayoutKind.Sequential, Size = 4 * RendererConstants.MixBufferCountMax, Pack = 1)]
-        private struct MixArray { }
-
-        /// <summary>
-        /// Mix buffer volumes.
-        /// </summary>
-        /// <remarks>Used when a splitter id is specified in the mix.</remarks>
-        public Span<float> MixBufferVolume => SpanHelpers.AsSpan<MixArray, float>(ref _mix);
-
-        /// <summary>
-        /// Previous mix buffer volumes.
-        /// </summary>
-        /// <remarks>Used when a splitter id is specified in the mix.</remarks>
-        public Span<float> PreviousMixBufferVolume => SpanHelpers.AsSpan<MixArray, float>(ref _previousMix);
-
-        /// <summary>
-        /// Get the  <see cref="Span{SplitterDestination}"/> of the next element or <see cref="Span{SplitterDestination}.Empty"/> if not present.
-        /// </summary>
-        public Span<SplitterDestination> Next
-        {
-            get
-            {
-                unsafe
-                {
-                    return _next != null ? new Span<SplitterDestination>(_next, 1) : Span<SplitterDestination>.Empty;
-                }
-            }
-        }
-
-        /// <summary>
-        /// Create a new <see cref="SplitterDestination"/>.
-        /// </summary>
-        /// <param name="id">The unique id of this <see cref="SplitterDestination"/>.</param>
-        public SplitterDestination(int id) : this()
-        {
-            Id = id;
-            DestinationId = RendererConstants.UnusedMixId;
-
-            ClearVolumes();
-        }
-
-        /// <summary>
-        /// Update the <see cref="SplitterDestination"/> from user parameter.
-        /// </summary>
-        /// <param name="parameter">The user parameter.</param>
-        public void Update(SplitterDestinationInParameter parameter)
-        {
-            Debug.Assert(Id == parameter.Id);
-
-            if (parameter.IsMagicValid() && Id == parameter.Id)
-            {
-                DestinationId = parameter.DestinationId;
-
-                parameter.MixBufferVolume.CopyTo(MixBufferVolume);
-
-                if (!IsUsed && parameter.IsUsed)
-                {
-                    MixBufferVolume.CopyTo(PreviousMixBufferVolume);
-
-                    NeedToUpdateInternalState = false;
-                }
-
-                IsUsed = parameter.IsUsed;
-            }
-        }
-
-        /// <summary>
-        /// Update the internal state of the instance.
-        /// </summary>
-        public void UpdateInternalState()
-        {
-            if (IsUsed && NeedToUpdateInternalState)
-            {
-                MixBufferVolume.CopyTo(PreviousMixBufferVolume);
-            }
-
-            NeedToUpdateInternalState = false;
-        }
-
-        /// <summary>
-        /// Set the update internal state marker.
-        /// </summary>
-        public void MarkAsNeedToUpdateInternalState()
-        {
-            NeedToUpdateInternalState = true;
-        }
-
-        /// <summary>
-        /// Return true if the <see cref="SplitterDestination"/> is used and has a destination.
-        /// </summary>
-        /// <returns>True if the <see cref="SplitterDestination"/> is used and has a destination.</returns>
-        public bool IsConfigured()
-        {
-            return IsUsed && DestinationId != RendererConstants.UnusedMixId;
-        }
-
-        /// <summary>
-        /// Get the volume for a given destination.
-        /// </summary>
-        /// <param name="destinationIndex">The destination index to use.</param>
-        /// <returns>The volume for the given destination.</returns>
-        public float GetMixVolume(int destinationIndex)
-        {
-            Debug.Assert(destinationIndex >= 0 && destinationIndex < RendererConstants.MixBufferCountMax);
-
-            return MixBufferVolume[destinationIndex];
-        }
-
-        /// <summary>
-        /// Clear the volumes.
-        /// </summary>
-        public void ClearVolumes()
-        {
-            MixBufferVolume.Fill(0);
-            PreviousMixBufferVolume.Fill(0);
-        }
-
-        /// <summary>
-        /// Link the next element to the given <see cref="SplitterDestination"/>.
-        /// </summary>
-        /// <param name="next">The given <see cref="SplitterDestination"/> to link.</param>
-        public void Link(ref SplitterDestination next)
-        {
-            unsafe
-            {
-                fixed (SplitterDestination *nextPtr = &next)
-                {
-                    _next = nextPtr;
-                }
-            }
-        }
-
-        /// <summary>
-        /// Remove the link to the next element.
-        /// </summary>
-        public void Unlink()
-        {
-            unsafe
-            {
-                _next = null;
-            }
-        }
-    }
-}