Improve meeting audio mixing pipeline

MeetingAssistant/Recording/NaudioCaptureSource.cs

@@ -1,5 +1,4 @@
 using System.Threading.Channels;
-using Microsoft.Extensions.Options;
 using NAudio.CoreAudioApi;
 using NAudio.Wave;
 
@@ -7,23 +6,29 @@ namespace MeetingAssistant.Recording;
 
 public sealed class MicrophoneAudioSource : IMeetingAudioSource
 {
-    private readonly MeetingAssistantOptions options;
     private readonly ILogger<MicrophoneAudioSource> logger;
 
-    public MicrophoneAudioSource(
-        IOptions<MeetingAssistantOptions> options,
-        ILogger<MicrophoneAudioSource> logger)
+    public MicrophoneAudioSource(ILogger<MicrophoneAudioSource> logger)
     {
-        this.options = options.Value;
         this.logger = logger;
     }
 
     public IAsyncEnumerable<AudioChunk> CaptureAsync(CancellationToken cancellationToken)
     {
-        return CaptureAsync(new WasapiCapture(), cancellationToken);
+        return CaptureAsync(new MeetingAssistantOptions(), cancellationToken);
     }
 
-    private IAsyncEnumerable<AudioChunk> CaptureAsync(IWaveIn capture, CancellationToken cancellationToken)
+    public IAsyncEnumerable<AudioChunk> CaptureAsync(
+        MeetingAssistantOptions options,
+        CancellationToken cancellationToken)
+    {
+        return CaptureAsync(new WasapiCapture(), 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);
@@ -94,18 +99,21 @@ public sealed class MicrophoneAudioSource : IMeetingAudioSource
 
 public sealed class SystemAudioSource : IMeetingAudioSource
 {
-    private readonly MeetingAssistantOptions options;
     private readonly ILogger<SystemAudioSource> logger;
 
-    public SystemAudioSource(
-        IOptions<MeetingAssistantOptions> options,
-        ILogger<SystemAudioSource> logger)
+    public SystemAudioSource(ILogger<SystemAudioSource> logger)
     {
-        this.options = options.Value;
         this.logger = logger;
     }
 
     public IAsyncEnumerable<AudioChunk> CaptureAsync(CancellationToken cancellationToken)
+    {
+        return CaptureAsync(new MeetingAssistantOptions(), cancellationToken);
+    }
+
+    public IAsyncEnumerable<AudioChunk> CaptureAsync(
+        MeetingAssistantOptions options,
+        CancellationToken cancellationToken)
     {
         var capture = new WasapiLoopbackCapture
         {