Add macOS native Audio Backend

Adds Ryujinx.Audio.Backends.Apple, which is a AudioToolbox based audio backend for macOS (and by extension iOS). Also added in MeloNX.

* Expose AudioToolkit in UI

Co-authored-by: GreemDev <greemdev@ryujinx.app>

src/Ryujinx/UI/ViewModels/SettingsViewModel.cs

@@ -3,6 +3,7 @@ using Avalonia.Controls;
 using Avalonia.Threading;
 using CommunityToolkit.Mvvm.ComponentModel;
 using LibHac.Tools.FsSystem;
+using Ryujinx.Audio.Backends.Apple;
 using Ryujinx.Audio.Backends.OpenAL;
 using Ryujinx.Audio.Backends.SDL2;
 using Ryujinx.Audio.Backends.SoundIo;
@@ -255,6 +256,7 @@ namespace Ryujinx.Ava.UI.ViewModels
         public bool IsOpenAlEnabled { get; set; }
         public bool IsSoundIoEnabled { get; set; }
         public bool IsSDL2Enabled { get; set; }
+        public bool IsAudioToolboxEnabled { get; set; }
         public bool IsCustomResolutionScaleActive => _resolutionScale == 4;
         public bool IsScalingFilterActive => _scalingFilter == (int)Ryujinx.Common.Configuration.ScalingFilter.Fsr;
 
@@ -459,12 +461,14 @@ namespace Ryujinx.Ava.UI.ViewModels
             IsOpenAlEnabled = OpenALHardwareDeviceDriver.IsSupported;
             IsSoundIoEnabled = SoundIoHardwareDeviceDriver.IsSupported;
             IsSDL2Enabled = SDL2HardwareDeviceDriver.IsSupported;
+            IsAudioToolboxEnabled = OperatingSystem.IsMacOS() && AppleHardwareDeviceDriver.IsSupported;
 
             await Dispatcher.UIThread.InvokeAsync(() =>
             {
                 OnPropertyChanged(nameof(IsOpenAlEnabled));
                 OnPropertyChanged(nameof(IsSoundIoEnabled));
                 OnPropertyChanged(nameof(IsSDL2Enabled));
+                OnPropertyChanged(nameof(IsAudioToolboxEnabled));
             });
         }
 

src/Ryujinx/UI/Views/Settings/SettingsAudioView.axaml

@@ -45,6 +45,9 @@
                         <ComboBoxItem
                             IsEnabled="{Binding IsSDL2Enabled}"
                             Content="{locale:Locale SettingsTabSystemAudioBackendSDL2}" />
+                        <ComboBoxItem
+                            IsEnabled="{Binding IsAudioToolboxEnabled}"
+                            Content="{locale:Locale SettingsTabSystemAudioBackendAudioToolbox}" />
                     </ComboBox>
                 </StackPanel>
                 <StackPanel Margin="10,0,0,0" Orientation="Horizontal">