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, 73 deletions

diff --git a/Ryujinx.Audio.Renderer/Dsp/State/DelayState.cs b/Ryujinx.Audio.Renderer/Dsp/State/DelayState.cs
deleted file mode 100644
index 7b694fb0..00000000
--- a/Ryujinx.Audio.Renderer/Dsp/State/DelayState.cs
+++ /dev/null
@@ -1,73 +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.Dsp.Effect;
-using Ryujinx.Audio.Renderer.Parameter.Effect;
-
-namespace Ryujinx.Audio.Renderer.Dsp.State
-{
-    public class DelayState
-    {
-        public DelayLine[] DelayLines { get; }
-        public float[] LowPassZ { get; set; }
-        public float FeedbackGain { get; private set; }
-        public float DelayFeedbackBaseGain { get; private set; }
-        public float DelayFeedbackCrossGain { get; private set; }
-        public float LowPassFeedbackGain { get; private set; }
-        public float LowPassBaseGain { get; private set; }
-
-        private const int FixedPointPrecision = 14;
-
-        public DelayState(ref DelayParameter parameter, ulong workBuffer)
-        {
-            DelayLines = new DelayLine[parameter.ChannelCount];
-            LowPassZ = new float[parameter.ChannelCount];
-
-            uint sampleRate = (uint)FixedPointHelper.ToInt(parameter.SampleRate, FixedPointPrecision) / 1000;
-
-            for (int i = 0; i < DelayLines.Length; i++)
-            {
-                DelayLines[i] = new DelayLine(sampleRate, parameter.DelayTimeMax);
-                DelayLines[i].SetDelay(parameter.DelayTime);
-                LowPassZ[0] = 0;
-            }
-
-            UpdateParameter(ref parameter);
-        }
-
-        public void UpdateParameter(ref DelayParameter parameter)
-        {
-            FeedbackGain = FixedPointHelper.ToFloat(parameter.FeedbackGain, FixedPointPrecision) * 0.98f;
-
-            float channelSpread = FixedPointHelper.ToFloat(parameter.ChannelSpread, FixedPointPrecision);
-
-            DelayFeedbackBaseGain = (1.0f - channelSpread) * FeedbackGain;
-
-            if (parameter.ChannelCount == 4 || parameter.ChannelCount == 6)
-            {
-                DelayFeedbackCrossGain = channelSpread * 0.5f * FeedbackGain;
-            }
-            else
-            {
-                DelayFeedbackCrossGain = channelSpread * FeedbackGain;
-            }
-
-            LowPassFeedbackGain = 0.95f * FixedPointHelper.ToFloat(parameter.LowPassAmount, FixedPointPrecision);
-            LowPassBaseGain = 1.0f - LowPassFeedbackGain;
-        }
-    }
-}