Archive completed meeting assistant changes

MeetingAssistant/Recording/OfflineTranscriptionBacklogProcessor.cs

@@ -4,14 +4,11 @@ using MeetingAssistant.Summary;
 using MeetingAssistant.Transcription;
 using MeetingAssistant.Workflow;
 using Microsoft.Extensions.Options;
-using NAudio.Wave;
 
 namespace MeetingAssistant.Recording;
 
 public sealed class OfflineTranscriptionBacklogProcessor
 {
-    private const int MaxChunkDurationMilliseconds = 1000;
-
     private readonly IOfflineTranscriptionBacklog backlog;
     private readonly ISpeechRecognitionPipelineFactory pipelineFactory;
     private readonly ITranscriptStore transcriptStore;
@@ -72,7 +69,7 @@ public sealed class OfflineTranscriptionBacklogProcessor
         try
         {
             await ProcessAsync(item, cancellationToken);
-            await backlog.CompleteAsync(item.Id, cancellationToken);
+            await backlog.CompleteAsync(item, cancellationToken);
             logger.LogInformation(
                 "Completed offline transcription backlog item {BacklogItemId} for recording {RecordingPath}",
                 item.Id,
@@ -215,29 +212,9 @@ public sealed class OfflineTranscriptionBacklogProcessor
         ISpeechRecognitionPipeline pipeline,
         CancellationToken cancellationToken)
     {
-        using var reader = new WaveFileReader(audioPath);
-        var bytesPerSecond = reader.WaveFormat.AverageBytesPerSecond;
-        var chunkSize = Math.Max(
-            reader.WaveFormat.BlockAlign,
-            bytesPerSecond * MaxChunkDurationMilliseconds / 1000);
-        chunkSize -= chunkSize % reader.WaveFormat.BlockAlign;
-
-        var buffer = new byte[chunkSize];
-        while (true)
+        await foreach (var chunk in PcmWavAudioChunkReader.ReadChunksAsync(audioPath, cancellationToken: cancellationToken))
         {
-            cancellationToken.ThrowIfCancellationRequested();
-            var read = await reader.ReadAsync(buffer.AsMemory(0, buffer.Length), cancellationToken);
-            if (read == 0)
-            {
-                break;
-            }
-
-            await pipeline.WriteAsync(
-                new AudioChunk(
-                    buffer[..read],
-                    reader.WaveFormat.SampleRate,
-                    reader.WaveFormat.Channels),
-                cancellationToken);
+            await pipeline.WriteAsync(chunk, cancellationToken);
         }
     }
 }