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, 124 insertions, 0 deletions

diff --git a/Ryujinx.Audio/Renderer/Dsp/Command/CommandList.cs b/Ryujinx.Audio/Renderer/Dsp/Command/CommandList.cs
new file mode 100644
index 00000000..fee90192
--- /dev/null
+++ b/Ryujinx.Audio/Renderer/Dsp/Command/CommandList.cs
@@ -0,0 +1,124 @@
+//
+// 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.Integration;
+using Ryujinx.Audio.Renderer.Server;
+using Ryujinx.Common;
+using Ryujinx.Common.Logging;
+using Ryujinx.Memory;
+using System;
+using System.Collections.Generic;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class CommandList
+    {
+        public ulong StartTime { get; private set; }
+        public ulong EndTime { get; private set; }
+        public uint SampleCount { get; }
+        public uint SampleRate { get; }
+
+        public Memory<float> Buffers { get; }
+        public uint BufferCount { get; }
+
+        public List<ICommand> Commands { get; }
+
+        public IVirtualMemoryManager MemoryManager { get; }
+
+        public IHardwareDevice OutputDevice { get; private set; }
+
+        public CommandList(AudioRenderSystem renderSystem) : this(renderSystem.MemoryManager,
+                                                                  renderSystem.GetMixBuffer(),
+                                                                  renderSystem.GetSampleCount(),
+                                                                  renderSystem.GetSampleRate(),
+                                                                  renderSystem.GetMixBufferCount(),
+                                                                  renderSystem.GetVoiceChannelCountMax())
+        {
+        }
+
+        public CommandList(IVirtualMemoryManager memoryManager, Memory<float> mixBuffer, uint sampleCount, uint sampleRate, uint mixBufferCount, uint voiceChannelCountMax)
+        {
+            SampleCount = sampleCount;
+            SampleRate = sampleRate;
+            BufferCount = mixBufferCount + voiceChannelCountMax;
+            Buffers = mixBuffer;
+            Commands = new List<ICommand>();
+            MemoryManager = memoryManager;
+        }
+
+        public void AddCommand(ICommand command)
+        {
+            Commands.Add(command);
+        }
+
+        public void AddCommand<T>(T command) where T : unmanaged, ICommand
+        {
+            throw new NotImplementedException();
+        }
+
+        public Memory<float> GetBufferMemory(int index)
+        {
+            return Buffers.Slice(index * (int)SampleCount, (int)SampleCount);
+        }
+
+        public Span<float> GetBuffer(int index)
+        {
+            return Buffers.Span.Slice(index * (int)SampleCount, (int)SampleCount);
+        }
+
+        public ulong GetTimeElapsedSinceDspStartedProcessing()
+        {
+            return (ulong)PerformanceCounter.ElapsedNanoseconds - StartTime;
+        }
+
+        public void Process(IHardwareDevice outputDevice)
+        {
+            OutputDevice = outputDevice;
+
+            StartTime = (ulong)PerformanceCounter.ElapsedNanoseconds;
+
+            foreach (ICommand command in Commands)
+            {
+                if (command.Enabled)
+                {
+                    bool shouldMeter = command.ShouldMeter();
+
+                    long startTime = 0;
+
+                    if (shouldMeter)
+                    {
+                        startTime = PerformanceCounter.ElapsedNanoseconds;
+                    }
+
+                    command.Process(this);
+
+                    if (shouldMeter)
+                    {
+                        ulong effectiveElapsedTime = (ulong)(PerformanceCounter.ElapsedNanoseconds - startTime);
+
+                        if (effectiveElapsedTime > command.EstimatedProcessingTime)
+                        {
+                            Logger.Warning?.Print(LogClass.AudioRenderer, $"Command {command.GetType().Name} took {effectiveElapsedTime}ns (expected {command.EstimatedProcessingTime}ns)");
+                        }
+                    }
+                }
+            }
+
+            EndTime = (ulong)PerformanceCounter.ElapsedNanoseconds;
+        }
+    }
+}