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

Ryujinx.Audio.Renderer/RendererConstants.cs

@@ -1,167 +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/>.
-//
-
-namespace Ryujinx.Audio.Renderer
-{
-    /// <summary>
-    /// Define constants used by the Audio Renderer.
-    /// </summary>
-    public static class RendererConstants
-    {
-        /// <summary>
-        /// The maximum number of channels supported. (6 channels for 5.1 surround)
-        /// </summary>
-        public const int ChannelCountMax = 6;
-
-        /// <summary>
-        /// The maximum number of channels supported per voice.
-        /// </summary>
-        public const int VoiceChannelCountMax = ChannelCountMax;
-
-        /// <summary>
-        /// The max count of mix buffer supported per operations (volumes, mix effect, ...)
-        /// </summary>
-        public const int MixBufferCountMax = 24;
-
-        /// <summary>
-        /// The max count of wavebuffer per voice.
-        /// </summary>
-        public const int VoiceWaveBufferCount = 4;
-
-        /// <summary>
-        /// The max count of biquad filter per voice.
-        /// </summary>
-        public const int VoiceBiquadFilterCount = 2;
-
-        /// <summary>
-        /// The lowest priority that a voice can have.
-        /// </summary>
-        public const int VoiceLowestPriority = 0xFF;
-
-        /// <summary>
-        /// The highest priority that a voice can have.
-        /// </summary>
-        /// <remarks>Voices with the highest priority will not be dropped if a voice drop needs to occur.</remarks>
-        public const int VoiceHighestPriority = 0;
-
-        /// <summary>
-        /// Max <see cref="Common.BehaviourParameter.ErrorInfo"/> that can be returned by <see cref="Parameter.BehaviourErrorInfoOutStatus"/>.
-        /// </summary>
-        public const int MaxErrorInfos = 10;
-
-        /// <summary>
-        /// Default alignment for buffers.
-        /// </summary>
-        public const int BufferAlignment = 0x40;
-
-        /// <summary>
-        /// Alignment required for the work buffer.
-        /// </summary>
-        public const int WorkBufferAlignment = 0x1000;
-
-        /// <summary>
-        /// Alignment required for every performance metrics frame.
-        /// </summary>
-        public const int PerformanceMetricsPerFramesSizeAlignment = 0x100;
-
-        /// <summary>
-        /// The id of the final mix.
-        /// </summary>
-        public const int FinalMixId = 0;
-
-        /// <summary>
-        /// The id defining an unused mix id.
-        /// </summary>
-        public const int UnusedMixId = int.MaxValue;
-
-        /// <summary>
-        /// The id defining an unused splitter id as a signed integer.
-        /// </summary>
-        public const int UnusedSplitterIdInt = -1;
-
-        /// <summary>
-        /// The id defining an unused splitter id.
-        /// </summary>
-        public const uint UnusedSplitterId = uint.MaxValue;
-
-        /// <summary>
-        /// The id of invalid/unused node id.
-        /// </summary>
-        public const int InvalidNodeId = -268435456;
-
-        /// <summary>
-        /// The indice considered invalid for processing order.
-        /// </summary>
-        public const int InvalidProcessingOrder = -1;
-
-        /// <summary>
-        /// The max number of audio renderer sessions allowed to be created system wide.
-        /// </summary>
-        public const int AudioRendererSessionCountMax = 2;
-
-        /// <summary>
-        /// The target sample rate of the audio renderer. (48kHz)
-        /// </summary>
-        public const uint TargetSampleRate = 48000;
-
-        /// <summary>
-        /// The target sample size of the audio renderer. (PCM16)
-        /// </summary>
-        public const int TargetSampleSize = sizeof(ushort);
-
-        /// <summary>
-        /// The target sample count per audio renderer update.
-        /// </summary>
-        public const int TargetSampleCount = 240;
-
-        /// <summary>
-        /// The size of an upsampler entry to process upsampling to <see cref="TargetSampleRate"/>.
-        /// </summary>
-        public const int UpSampleEntrySize = TargetSampleCount * VoiceChannelCountMax;
-
-        /// <summary>
-        /// The target audio latency computed from <see cref="TargetSampleRate"/> and <see cref="TargetSampleCount"/>.
-        /// </summary>
-        public const int AudioProcessorMaxUpdateTimeTarget = 1000000000 / ((int)TargetSampleRate / TargetSampleCount); // 5.00 ms
-
-        /// <summary>
-        /// The max update time of the DSP on original hardware.
-        /// </summary>
-        public const int AudioProcessorMaxUpdateTime = 5760000; // 5.76 ms
-
-        /// <summary>
-        /// The max update time per audio renderer session.
-        /// </summary>
-        public const int AudioProcessorMaxUpdateTimePerSessions = AudioProcessorMaxUpdateTime / AudioRendererSessionCountMax;
-
-        /// <summary>
-        /// Guest timer frequency used for system ticks.
-        /// </summary>
-        public const int TargetTimerFrequency = 19200000;
-
-        /// <summary>
-        /// The default coefficients used for standard 5.1 surround to stereo downmixing.
-        /// </summary>
-        public static float[] DefaultSurroundToStereoCoefficients = new float[4]
-        {
-            1.0f,
-            0.707f,
-            0.251f,
-            0.707f,
-        };
-    }
-}