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, 237 deletions

diff --git a/Ryujinx.Audio.Renderer/Server/Splitter/SplitterState.cs b/Ryujinx.Audio.Renderer/Server/Splitter/SplitterState.cs
deleted file mode 100644
index c928ec53..00000000
--- a/Ryujinx.Audio.Renderer/Server/Splitter/SplitterState.cs
+++ /dev/null
@@ -1,237 +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 System;
-using System.Buffers;
-using System.Diagnostics;
-using System.Runtime.InteropServices;
-
-namespace Ryujinx.Audio.Renderer.Server.Splitter
-{
-    /// <summary>
-    /// Server state for a splitter.
-    /// </summary>
-    [StructLayout(LayoutKind.Sequential, Size = 0x20, Pack = Alignment)]
-    public struct SplitterState
-    {
-        public const int Alignment = 0x10;
-
-        /// <summary>
-        /// The unique id of this <see cref="SplitterState"/>.
-        /// </summary>
-        public int Id;
-
-        /// <summary>
-        /// Target sample rate to use on the splitter.
-        /// </summary>
-        public uint SampleRate;
-
-        /// <summary>
-        /// Count of splitter destinations (<see cref="SplitterDestination"/>).
-        /// </summary>
-        public int DestinationCount;
-
-        /// <summary>
-        /// Set to true if the splitter has a new connection.
-        /// </summary>
-        [MarshalAs(UnmanagedType.I1)]
-        public bool HasNewConnection;
-
-        /// <summary>
-        /// Linked list of <see cref="SplitterDestination"/>.
-        /// </summary>
-        private unsafe SplitterDestination* _destinationsData;
-
-        /// <summary>
-        /// Span to the first element of the linked list of <see cref="SplitterDestination"/>.
-        /// </summary>
-        public Span<SplitterDestination> Destinations
-        {
-            get
-            {
-                unsafe
-                {
-                    return (IntPtr)_destinationsData != IntPtr.Zero ? new Span<SplitterDestination>(_destinationsData, 1) : Span<SplitterDestination>.Empty;
-                }
-            }
-        }
-
-        /// <summary>
-        /// Create a new <see cref="SplitterState"/>.
-        /// </summary>
-        /// <param name="id">The unique id of this <see cref="SplitterState"/>.</param>
-        public SplitterState(int id) : this()
-        {
-            Id = id;
-        }
-
-        public Span<SplitterDestination> GetData(int index)
-        {
-            int i = 0;
-
-            Span<SplitterDestination> result = Destinations;
-
-            while (i < index)
-            {
-                if (result.IsEmpty)
-                {
-                    break;
-                }
-
-                result = result[0].Next;
-                i++;
-            }
-
-            return result;
-        }
-
-        /// <summary>
-        /// Clear the new connection flag.
-        /// </summary>
-        public void ClearNewConnectionFlag()
-        {
-            HasNewConnection = false;
-        }
-
-        /// <summary>
-        /// Utility function to apply a given <see cref="SpanAction{T, TArg}"/> to all <see cref="Destinations"/>.
-        /// </summary>
-        /// <param name="action">The action to execute on each elements.</param>
-        private void ForEachDestination(SpanAction<SplitterDestination, int> action)
-        {
-            Span<SplitterDestination> temp = Destinations;
-
-            int i = 0;
-
-            while (true)
-            {
-                if (temp.IsEmpty)
-                {
-                    break;
-                }
-
-                Span<SplitterDestination> next = temp[0].Next;
-
-                action.Invoke(temp, i++);
-
-                temp = next;
-            }
-        }
-
-        /// <summary>
-        /// Update the <see cref="SplitterState"/> from user parameter.
-        /// </summary>
-        /// <param name="context">The splitter context.</param>
-        /// <param name="parameter">The user parameter.</param>
-        /// <param name="input">The raw input data after the <paramref name="parameter"/>.</param>
-        public void Update(SplitterContext context, ref SplitterInParameter parameter, ReadOnlySpan<byte> input)
-        {
-            ClearLinks();
-
-            int destinationCount;
-
-            if (context.IsBugFixed)
-            {
-                destinationCount = parameter.DestinationCount;
-            }
-            else
-            {
-                destinationCount = Math.Min(context.GetDestinationCountPerStateForCompatibility(), parameter.DestinationCount);
-            }
-
-            if (destinationCount > 0)
-            {
-                ReadOnlySpan<int> destinationIds = MemoryMarshal.Cast<byte, int>(input);
-
-                Memory<SplitterDestination> destination = context.GetDestinationMemory(destinationIds[0]);
-
-                SetDestination(ref destination.Span[0]);
-
-                DestinationCount = destinationCount;
-
-                for (int i = 1; i < destinationCount; i++)
-                {
-                    Memory<SplitterDestination> nextDestination = context.GetDestinationMemory(destinationIds[i]);
-
-                    destination.Span[0].Link(ref nextDestination.Span[0]);
-                    destination = nextDestination;
-                }
-            }
-
-            Debug.Assert(parameter.Id == Id);
-
-            if (parameter.Id == Id)
-            {
-                SampleRate = parameter.SampleRate;
-                HasNewConnection = true;
-            }
-        }
-
-        /// <summary>
-        /// Set the head of the linked list of <see cref="Destinations"/>.
-        /// </summary>
-        /// <param name="newValue">A reference to a <see cref="SplitterDestination"/>.</param>
-        public void SetDestination(ref SplitterDestination newValue)
-        {
-            unsafe
-            {
-                fixed (SplitterDestination* newValuePtr = &newValue)
-                {
-                    _destinationsData = newValuePtr;
-                }
-            }
-        }
-
-        /// <summary>
-        /// Update the internal state of this instance.
-        /// </summary>
-        public void UpdateInternalState()
-        {
-            ForEachDestination((destination, _) => destination[0].UpdateInternalState());
-        }
-
-        /// <summary>
-        /// Clear all links from the <see cref="Destinations"/>.
-        /// </summary>
-        public void ClearLinks()
-        {
-            ForEachDestination((destination, _) => destination[0].Unlink());
-
-            unsafe
-            {
-                _destinationsData = (SplitterDestination*)IntPtr.Zero;
-            }
-        }
-
-        /// <summary>
-        /// Initialize a given <see cref="Span{SplitterState}"/>.
-        /// </summary>
-        /// <param name="splitters">All the <see cref="SplitterState"/> to initialize.</param>
-        public static void InitializeSplitters(Span<SplitterState> splitters)
-        {
-            foreach (ref SplitterState splitter in splitters)
-            {
-                unsafe
-                {
-                    splitter._destinationsData = (SplitterDestination*)IntPtr.Zero;
-                }
-
-                splitter.DestinationCount = 0;
-            }
-        }
-    }
-}