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, 103 deletions

diff --git a/Ryujinx.Audio.Renderer/Dsp/Command/DepopForMixBuffersCommand.cs b/Ryujinx.Audio.Renderer/Dsp/Command/DepopForMixBuffersCommand.cs
deleted file mode 100644
index c6feacfb..00000000
--- a/Ryujinx.Audio.Renderer/Dsp/Command/DepopForMixBuffersCommand.cs
+++ /dev/null
@@ -1,103 +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;
-
-namespace Ryujinx.Audio.Renderer.Dsp.Command
-{
-    public class DepopForMixBuffersCommand : ICommand
-    {
-        public bool Enabled { get; set; }
-
-        public int NodeId { get; }
-
-        public CommandType CommandType => CommandType.DepopForMixBuffers;
-
-        public ulong EstimatedProcessingTime { get; set; }
-
-        public uint MixBufferOffset { get; }
-
-        public uint MixBufferCount { get; }
-
-        public float Decay { get; }
-
-        public Memory<float> DepopBuffer { get; }
-
-        private const int FixedPointPrecisionForDecay = 15;
-
-        public DepopForMixBuffersCommand(Memory<float> depopBuffer, uint bufferOffset, uint mixBufferCount, int nodeId, uint sampleRate)
-        {
-            Enabled = true;
-            NodeId = nodeId;
-            MixBufferOffset = bufferOffset;
-            MixBufferCount = mixBufferCount;
-            DepopBuffer = depopBuffer;
-
-            if (sampleRate == 48000)
-            {
-                Decay = 0.962189f;
-            }
-            else // if (sampleRate == 32000)
-            {
-                Decay = 0.943695f;
-            }
-        }
-
-        private float ProcessDepopMix(Span<float> buffer, float depopValue, uint sampleCount)
-        {
-            if (depopValue <= 0)
-            {
-                for (int i = 0; i < sampleCount; i++)
-                {
-                    depopValue = FloatingPointHelper.MultiplyRoundDown(Decay, depopValue);
-
-                    buffer[i] -= depopValue;
-                }
-
-                return -depopValue;
-            }
-            else
-            {
-                for (int i = 0; i < sampleCount; i++)
-                {
-                    depopValue = FloatingPointHelper.MultiplyRoundDown(Decay, depopValue);
-
-                    buffer[i] += depopValue;
-                }
-
-                return depopValue;
-            }
-
-        }
-
-        public void Process(CommandList context)
-        {
-            uint bufferCount = Math.Min(MixBufferOffset + MixBufferCount, context.BufferCount);
-
-            for (int i = (int)MixBufferOffset; i < bufferCount; i++)
-            {
-                float depopValue = DepopBuffer.Span[i];
-                if (depopValue != 0)
-                {
-                    Span<float> buffer = context.GetBuffer(i);
-
-                    DepopBuffer.Span[i] = ProcessDepopMix(buffer, depopValue, context.SampleCount);
-                }
-            }
-        }
-    }
-}