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, 89 deletions

diff --git a/Ryujinx.Audio.Renderer/Dsp/Command/DownMixSurroundToStereoCommand.cs b/Ryujinx.Audio.Renderer/Dsp/Command/DownMixSurroundToStereoCommand.cs
deleted file mode 100644
index 96138db2..00000000
--- a/Ryujinx.Audio.Renderer/Dsp/Command/DownMixSurroundToStereoCommand.cs
+++ /dev/null
@@ -1,89 +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;
-using System.Runtime.CompilerServices;
-
-namespace Ryujinx.Audio.Renderer.Dsp.Command
-{
-    public class DownMixSurroundToStereoCommand : ICommand
-    {
-        public bool Enabled { get; set; }
-
-        public int NodeId { get; }
-
-        public CommandType CommandType => CommandType.DownMixSurroundToStereo;
-
-        public ulong EstimatedProcessingTime { get; set; }
-
-        public ushort[] InputBufferIndices { get; }
-        public ushort[] OutputBufferIndices { get; }
-
-        public float[] Coefficients { get; }
-
-        public DownMixSurroundToStereoCommand(uint bufferOffset, Span<byte> inputBufferOffset, Span<byte> outputBufferOffset, ReadOnlySpan<float> downMixParameter, int nodeId)
-        {
-            Enabled = true;
-            NodeId = nodeId;
-
-            InputBufferIndices = new ushort[RendererConstants.VoiceChannelCountMax];
-            OutputBufferIndices = new ushort[RendererConstants.VoiceChannelCountMax];
-
-            for (int i = 0; i < RendererConstants.VoiceChannelCountMax; i++)
-            {
-                InputBufferIndices[i] = (ushort)(bufferOffset + inputBufferOffset[i]);
-                OutputBufferIndices[i] = (ushort)(bufferOffset + outputBufferOffset[i]);
-            }
-
-            Coefficients = downMixParameter.ToArray();
-        }
-
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        private static float DownMixSurroundToStereo(ReadOnlySpan<float> coefficients, float back, float lfe, float center, float front)
-        {
-            return FloatingPointHelper.RoundUp(coefficients[3] * back + coefficients[2] * lfe + coefficients[1] * center + coefficients[0] * front);
-        }
-
-        public void Process(CommandList context)
-        {
-            ReadOnlySpan<float> frontLeft = context.GetBuffer(InputBufferIndices[0]);
-            ReadOnlySpan<float> frontRight = context.GetBuffer(InputBufferIndices[1]);
-            ReadOnlySpan<float> frontCenter = context.GetBuffer(InputBufferIndices[2]);
-            ReadOnlySpan<float> lowFrequency = context.GetBuffer(InputBufferIndices[3]);
-            ReadOnlySpan<float> backLeft = context.GetBuffer(InputBufferIndices[4]);
-            ReadOnlySpan<float> backRight = context.GetBuffer(InputBufferIndices[5]);
-
-            Span<float> stereoLeft = context.GetBuffer(OutputBufferIndices[0]);
-            Span<float> stereoRight = context.GetBuffer(OutputBufferIndices[1]);
-            Span<float> unused2 = context.GetBuffer(OutputBufferIndices[2]);
-            Span<float> unused3 = context.GetBuffer(OutputBufferIndices[3]);
-            Span<float> unused4 = context.GetBuffer(OutputBufferIndices[4]);
-            Span<float> unused5 = context.GetBuffer(OutputBufferIndices[5]);
-
-            for (int i = 0; i < context.SampleCount; i++)
-            {
-                stereoLeft[i] = DownMixSurroundToStereo(Coefficients, backLeft[i], lowFrequency[i], frontCenter[i], frontLeft[i]);
-                stereoRight[i] = DownMixSurroundToStereo(Coefficients, backRight[i], lowFrequency[i], frontCenter[i], frontRight[i]);
-            }
-
-            unused2.Fill(0);
-            unused3.Fill(0);
-            unused4.Fill(0);
-            unused5.Fill(0);
-        }
-    }
-}