Add managed UIKit iOS client

2026-09-19 15:43:37 +02:00
parent d0a72176ba
commit c6715028c1
41 changed files with 1110 additions and 40 deletions
@@ -0,0 +1,63 @@
+using AVFoundation;
+using Foundation;
+
+namespace VoiceCat.iOS;
+
+internal enum IosAudioPreset { VoiceChat, StereoMicrophone, MonoMicrophone, Advanced }
+
+internal sealed class IosAudioRouter
+{
+    internal static IosAudioRouter Shared { get; } = new();
+    private readonly NSUserDefaults defaults = NSUserDefaults.StandardUserDefaults;
+    internal IosAudioPreset Preset { get; private set; } = IosAudioPreset.VoiceChat;
+    internal bool ForceSpeaker { get; set; }
+    internal bool VoiceProcessing { get; set; } = true;
+    internal bool AutomaticGainControl { get; set; } = true;
+    internal int CaptureChannels => Preset == IosAudioPreset.StereoMicrophone ? 2 : 1;
+    internal bool UsesVoiceProcessing => VoiceProcessing && CaptureChannels == 1 && Preset != IosAudioPreset.MonoMicrophone;
+
+    private IosAudioRouter()
+    {
+        NSNotificationCenter.DefaultCenter.AddObserver(AVAudioSession.RouteChangeNotification, _ => Recover());
+        NSNotificationCenter.DefaultCenter.AddObserver(AVAudioSession.InterruptionNotification, note => HandleInterruption(note));
+        NSNotificationCenter.DefaultCenter.AddObserver(AVAudioSession.MediaServicesWereResetNotification, _ => Recover());
+    }
+
+    internal void Load()
+    {
+        string? preset = defaults.StringForKey("cat.voice.audio.preset");
+        if (Enum.TryParse(preset, true, out IosAudioPreset value)) Preset = value;
+        ForceSpeaker = defaults.BoolForKey("cat.voice.audio.forceSpeaker");
+        VoiceProcessing = defaults.ValueForKey(new NSString("cat.voice.audio.voiceProcessing")) is null || defaults.BoolForKey("cat.voice.audio.voiceProcessing");
+        AutomaticGainControl = defaults.ValueForKey(new NSString("cat.voice.audio.agc")) is null || defaults.BoolForKey("cat.voice.audio.agc");
+    }
+
+    internal void SelectPreset(IosAudioPreset preset)
+    {
+        Preset = preset; defaults.SetString(preset.ToString(), "cat.voice.audio.preset"); defaults.Synchronize();
+        if (IosAudioEngine.Shared.IsConnected) IosAudioEngine.Shared.Reconfigure();
+    }
+
+    internal void Apply()
+    {
+        AVAudioSession session = AVAudioSession.SharedInstance();
+        AVAudioSessionCategoryOptions options = AVAudioSessionCategoryOptions.AllowBluetooth;
+        if (Preset is IosAudioPreset.StereoMicrophone or IosAudioPreset.MonoMicrophone)
+            options = AVAudioSessionCategoryOptions.AllowBluetoothA2DP | AVAudioSessionCategoryOptions.DefaultToSpeaker;
+        if (!session.SetCategory(AVAudioSessionCategory.PlayAndRecord, AVAudioSessionMode.Default, options, out NSError? categoryError))
+            throw new InvalidOperationException(categoryError.LocalizedDescription);
+        session.SetPreferredSampleRate(48_000, out _);
+        session.SetPreferredIOBufferDuration(0.02, out _);
+        if (!session.SetActive(true, AVAudioSessionSetActiveOptions.NotifyOthersOnDeactivation, out NSError? activeError))
+            throw new InvalidOperationException(activeError.LocalizedDescription);
+        session.OverrideOutputAudioPort(ForceSpeaker ? AVAudioSessionPortOverride.Speaker : AVAudioSessionPortOverride.None, out _);
+    }
+
+    internal void Deactivate() => AVAudioSession.SharedInstance().SetActive(false, AVAudioSessionSetActiveOptions.NotifyOthersOnDeactivation, out _);
+    private void Recover() { if (IosAudioEngine.Shared.IsConnected) UIApplication.SharedApplication.BeginInvokeOnMainThread(IosAudioEngine.Shared.Reconfigure); }
+    private void HandleInterruption(NSNotification note)
+    {
+        NSNumber? type = note.UserInfo?[new NSString("AVAudioSessionInterruptionTypeKey")] as NSNumber;
+        if ((AVAudioSessionInterruptionType)(type?.UInt32Value ?? 0) == AVAudioSessionInterruptionType.Ended) Recover();
+    }
+}