Archive completed meeting assistant changes

MeetingAssistant/Recording/WindowsMicrophoneDeviceProvider.cs

@@ -0,0 +1,79 @@
+using NAudio.CoreAudioApi;
+using NAudio.Wave;
+
+namespace MeetingAssistant.Recording;
+
+public sealed class WindowsMicrophoneDeviceProvider : IMicrophoneDeviceProvider
+{
+    private readonly MicrophoneDeviceSelection selection;
+    private readonly ILogger<WindowsMicrophoneDeviceProvider> logger;
+
+    public WindowsMicrophoneDeviceProvider(
+        MicrophoneDeviceSelection selection,
+        ILogger<WindowsMicrophoneDeviceProvider> logger)
+    {
+        this.selection = selection;
+        this.logger = logger;
+    }
+
+    public IReadOnlyList<MicrophoneDevice> GetAvailableMicrophones()
+    {
+        try
+        {
+            using var enumerator = new MMDeviceEnumerator();
+            return enumerator
+                .EnumerateAudioEndPoints(DataFlow.Capture, DeviceState.Active)
+                .Select(ToMicrophoneDevice)
+                .OrderBy(device => device.Name, StringComparer.CurrentCultureIgnoreCase)
+                .ToArray();
+        }
+        catch (Exception exception)
+        {
+            logger.LogWarning(exception, "Could not enumerate microphone capture endpoints");
+            return [];
+        }
+    }
+
+    public MicrophoneDeviceSnapshot GetMicrophoneSnapshot(MeetingAssistantOptions options)
+    {
+        var devices = GetAvailableMicrophones();
+        return new MicrophoneDeviceSnapshot(
+            devices,
+            selection.Resolve(options.Recording.MicrophoneDeviceId, GetDefaultMicrophone(), devices));
+    }
+
+    public IWaveIn CreateCapture(MeetingAssistantOptions options)
+    {
+        var current = GetMicrophoneSnapshot(options).Current;
+        if (current is null)
+        {
+            logger.LogInformation("Starting microphone capture from Windows default capture endpoint");
+            return new WasapiCapture();
+        }
+
+        logger.LogInformation(
+            "Starting microphone capture from {MicrophoneName} ({MicrophoneDeviceId})",
+            current.Name,
+            current.Id);
+        using var enumerator = new MMDeviceEnumerator();
+        return new WasapiCapture(enumerator.GetDevice(current.Id));
+    }
+
+    private static MicrophoneDevice? GetDefaultMicrophone()
+    {
+        try
+        {
+            using var enumerator = new MMDeviceEnumerator();
+            return ToMicrophoneDevice(enumerator.GetDefaultAudioEndpoint(DataFlow.Capture, Role.Console));
+        }
+        catch
+        {
+            return null;
+        }
+    }
+
+    private static MicrophoneDevice ToMicrophoneDevice(MMDevice device)
+    {
+        return new MicrophoneDevice(device.ID, device.FriendlyName);
+    }
+}