TASK 4 audio follow-up: game audio bar + mic status dot + always-on capture — the footer's second audio control (desktop/game, a mirror of the mic bar: meter + mute + volume) appears only while a full-screen game is producing sound (IGameAudioDetector seam + GameAudioHysteresis: show ~500ms of fullscreen+sound, hide ~1s after leaving fullscreen, silence never hides an active bar; VM polls on a 250ms timer); capture now runs for the app's lifetime so both meters preview live (started at startup via StartMicCaptureAsync, disposed in Shutdown — no longer go-live driven); MIC label is a button with a status dot (Models/MicStatus: green via the source Started event, yellow = mic problem, red = no device); PickMicrophone swaps the live device immediately via AudioMixer.RestartMic; fixed a latent ?.Invoke(meter.Push(...)) short-circuit that skipped the meter update when nothing subscribed — 167 tests passing, 0 warnings

2026-08-13 11:29:44 -07:00
parent ea250c02a6
commit 9f9ed34627
20 changed files with 897 additions and 82 deletions
@@ -0,0 +1,46 @@
+namespace ytLive.Services;
+
+/// <summary>
+/// Default <see cref="IGameAudioDetector"/>: samples a full-screen monitor
+/// provider (the existing <c>IFullScreenDetector</c>) and the live loopback
+/// level and advances a <see cref="GameAudioHysteresis"/>. The pure transitions
+/// live in GameAudioHysteresis (unit-tested); this wrapper owns the providers
+/// and the raised-changed event. WPF-free — the VM owns the poll timer.
+/// </summary>
+public sealed class GameAudioDetector : IGameAudioDetector
+{
+    private const float SoundFloor = 0.005f;
+
+    private readonly Func<int?> _foregroundFullScreenMonitorProvider;
+    private readonly Func<float> _loopbackLevelProvider;
+    private readonly Func<DateTime> _now;
+    private readonly GameAudioHysteresis _hysteresis = new();
+
+    /// <param name="foregroundFullScreenMonitorProvider">Returns the monitor a
+    /// full-screen foreground window covers, or null when windowed/none.</param>
+    /// <param name="loopbackLevelProvider">Current smoothed desktop/game level (0..1).</param>
+    /// <param name="now">Clock for the hysteresis windows; injectable for tests.</param>
+    public GameAudioDetector(
+        Func<int?> foregroundFullScreenMonitorProvider,
+        Func<float> loopbackLevelProvider,
+        Func<DateTime>? now = null)
+    {
+        _foregroundFullScreenMonitorProvider = foregroundFullScreenMonitorProvider;
+        _loopbackLevelProvider = loopbackLevelProvider;
+        _now = now ?? (() => DateTime.Now);
+    }
+
+    public bool IsGameAudioActive => _hysteresis.IsActive;
+
+    public event Action<bool>? IsGameAudioActiveChanged;
+
+    public void Poll()
+    {
+        var before = _hysteresis.IsActive;
+        var isFullScreen = _foregroundFullScreenMonitorProvider() != null;
+        var hasSound = _loopbackLevelProvider() > SoundFloor;
+        _hysteresis.Update(isFullScreen, hasSound, _now());
+        if (before != _hysteresis.IsActive)
+            IsGameAudioActiveChanged?.Invoke(_hysteresis.IsActive);
+    }
+}