fix: recover from microphone disconnects

MeetingAssistant/Recording/NaudioCaptureSource.cs

@@ -4,41 +4,28 @@ using NAudio.Wave;
 
 namespace MeetingAssistant.Recording;
 
-public sealed class MicrophoneAudioSource : IMeetingAudioSource
+internal sealed class NaudioCaptureAudioSource : IMeetingAudioSource
 {
-    private readonly IMicrophoneDeviceProvider microphones;
-    private readonly ILogger<MicrophoneAudioSource> logger;
+    private readonly IWaveIn capture;
+    private readonly string sourceName;
+    private readonly ILogger logger;
 
-    public MicrophoneAudioSource(
-        IMicrophoneDeviceProvider microphones,
-        ILogger<MicrophoneAudioSource> logger)
+    public NaudioCaptureAudioSource(
+        IWaveIn capture,
+        string sourceName,
+        ILogger logger)
     {
-        this.microphones = microphones;
+        this.capture = capture;
+        this.sourceName = sourceName;
         this.logger = logger;
     }
 
     public IAsyncEnumerable<AudioChunk> CaptureAsync(CancellationToken cancellationToken)
     {
-        return CaptureAsync(new MeetingAssistantOptions(), cancellationToken);
+        return CaptureWith(capture, sourceName, logger, cancellationToken);
     }
 
-    public IAsyncEnumerable<AudioChunk> CaptureAsync(
-        MeetingAssistantOptions options,
-        CancellationToken cancellationToken)
-    {
-        return CaptureAsync(microphones.CreateCapture(options), options, cancellationToken);
-    }
-
-    private IAsyncEnumerable<AudioChunk> CaptureAsync(
-        IWaveIn capture,
-        MeetingAssistantOptions options,
-        CancellationToken cancellationToken)
-    {
-        capture.WaveFormat = new WaveFormat(options.Recording.SampleRate, 16, options.Recording.Channels);
-        return CaptureWith(capture, "microphone", logger, cancellationToken);
-    }
-
-    internal static async IAsyncEnumerable<AudioChunk> CaptureWith(
+    private static async IAsyncEnumerable<AudioChunk> CaptureWith(
         IWaveIn capture,
         string sourceName,
         ILogger logger,
@@ -124,6 +111,6 @@ public sealed class SystemAudioSource : IMeetingAudioSource
             WaveFormat = new WaveFormat(options.Recording.SampleRate, 16, options.Recording.Channels)
         };
 
-        return MicrophoneAudioSource.CaptureWith(capture, "system", logger, cancellationToken);
+        return new NaudioCaptureAudioSource(capture, "system", logger).CaptureAsync(cancellationToken);
     }
 }