Fix: UI freeze when switching mic.

MainForm.cs

@@ -1,8 +1,8 @@
-using AutoHotkey.Interop;
+using System.Diagnostics;
+using System.Globalization;
+using AutoHotkey.Interop;
 using EdgeTTS;
 using NAudio.Wave;
-using System.Diagnostics;
-using System.Globalization;
 
 namespace HellDivers2OneKeyStratagem;
 
@@ -18,7 +18,7 @@ public MainForm()
     private void SetTooltipFont()
     {
         toolTip.OwnerDraw = true;
-        toolTip.Popup += (sender, args) =>
+        toolTip.Popup += (_, args) =>
         {
             var text = toolTip.GetToolTip(args.AssociatedControl);
             args.ToolTipSize = TextRenderer.MeasureText(text, Font);
@@ -113,9 +113,7 @@ private async Task LoadByLanguage()
 
     private async Task ResetVoiceCommand()
     {
-        _voiceCommand?.Stop();
-        _voiceCommand?.Dispose();
-        _voiceCommand = null;
+        await StopVoiceTrigger();
 
         if (Settings.EnableSpeechTrigger)
             await StartSpeechTrigger();
@@ -203,10 +201,14 @@ private void PlayStratagemVoice(string stratagemName)
         PlayVoice(Path.Combine(VoiceRootPath, Settings.Language, Settings.VoiceName, stratagemName + ".mp3"));
     }
 
-    private void StopVoiceTrigger()
+    private async Task StopVoiceTrigger()
     {
-        _voiceCommand?.Stop();
-        _voiceCommand = null;
+        if (_voiceCommand != null)
+        {
+            await _voiceCommand.Stop();
+            _voiceCommand.Dispose();
+            _voiceCommand = null;
+        }
     }
 
     private void LoadVoiceNames()
@@ -848,7 +850,7 @@ private async void enableSpeechTriggerCheckBox_Click(object sender, EventArgs e)
             if (Settings.EnableSpeechTrigger)
                 await StartSpeechTrigger();
             else
-                StopVoiceTrigger();
+                await StopVoiceTrigger();
         }
 
         speechSubSettingsFlowLayoutPanel.Visible = Settings.EnableSpeechTrigger;
@@ -857,12 +859,12 @@ private async void enableSpeechTriggerCheckBox_Click(object sender, EventArgs e)
 
     private bool _isClosing;
 
-    private void MainForm_FormClosing(object sender, FormClosingEventArgs e)
+    private async void MainForm_FormClosing(object sender, FormClosingEventArgs e)
     {
         _isClosing = true;
 
         StopAutoHotkeyScript();
-        StopVoiceTrigger();
+        await StopVoiceTrigger();
     }
 
     private void enableSetFKeyBySpeechCheckBox_Click(object sender, EventArgs e)

Tools/VoiceCommand.cs

@@ -70,14 +70,27 @@ public void Start()
         _isRecognizing = true;
     }
 
-    public void Stop()
+    public async Task Stop()
     {
-        _recognizer.RecognizeAsyncStop();
+        if (!_isRecognizing)
+            return;
+
+        _recognizer.RecognizeAsyncCancel();
+
+        while (_isRecognizing)
+            await Task.Delay(100);
     }
 
     public void Dispose()
     {
+        if (_isRecognizing)
+            _recognizer.RecognizeAsyncCancel();
         _recognizer.Dispose();
+
+        _waveInEvent?.StopRecording();
+        _waveInEvent?.Dispose();
+        _audioStreamer?.Dispose();
+
         GC.SuppressFinalize(this);
     }
 
@@ -198,30 +211,33 @@ private static WaveFormat GetWaveFormat(SupportedWaveFormat eFormat, out int sam
         return new WaveFormat(samplesRate, bitsPerSample, nChannel);
     }
 
-    public async Task UseMic(int deviceIndex)
+    public async Task<bool> UseMic(int deviceIndex)
     {
+        //settings
+        var device = WaveInEvent.GetCapabilities(deviceIndex);
+        SupportedWaveFormat supportFormat = 0;
+        foreach (SupportedWaveFormat format in Enum.GetValues(typeof(SupportedWaveFormat)))
+            if (device.SupportsWaveFormat(format) && format <= SupportedWaveFormat.WAVE_FORMAT_48S16 && (int)Math.Log2((int)format) % 2 == 0) //找个单通道的
+                supportFormat = format; //取最后一个支持的。
+
+        if (supportFormat == 0)
+            return false;
+
+        var isRecognizingBeforeChangingMic = _isRecognizing;
+        if (_isRecognizing)
+            await Stop();
+
         //cleanup
-        if (_waveInEvent != null)
-        {
-            _waveInEvent.StopRecording();
-            _waveInEvent.Dispose();
-        }
+        _waveInEvent?.Dispose();
 
         if (_audioStreamer != null)
         {
             _audioStreamer.Close();
             await _audioStreamer.DisposeAsync();
         }
 
-        //settings
         _waveInEvent = new WaveInEvent();
         _waveInEvent.DeviceNumber = deviceIndex; //device.ID;
-        var device = WaveInEvent.GetCapabilities(deviceIndex);
-        SupportedWaveFormat supportFormat = 0;
-        foreach (SupportedWaveFormat format in Enum.GetValues(typeof(SupportedWaveFormat)))
-            if (device.SupportsWaveFormat(format) && format <= SupportedWaveFormat.WAVE_FORMAT_48S16 && (int)Math.Log2((int)format) % 2 == 0) //找个单通道的
-                supportFormat = format; //取最后一个支持的。
-
         _waveInEvent.WaveFormat = GetWaveFormat(
             supportFormat, out var samplesRate, out var nChannel, out _,
             out var eBitsPerSample, out var eChannel);
@@ -235,31 +251,27 @@ public async Task UseMic(int deviceIndex)
 
         var audioFormat = new SpeechAudioFormatInfo(nChannel * samplesRate, eBitsPerSample, eChannel);
 
-        //start record microphone
         _waveInEvent.StartRecording();
+        _recognizer.SetInputToAudioStream(_audioStreamer, audioFormat);
 
         //restart _recognizer
-        if (_isRecognizing)
-        {
-            Stop();
-            while (_isRecognizing)
-                await Task.Delay(100);
-
-            _recognizer.SetInputToAudioStream(_audioStreamer, audioFormat);
+        if (isRecognizingBeforeChangingMic)
             Start();
-        }
+
+        return true;
     }
 
-    public async Task UseMic(string deviceName)
+    public async Task<bool> UseMic(string deviceName)
     {
         for (var i = 0; i < WaveInEvent.DeviceCount; i++)
         {
             var device = WaveInEvent.GetCapabilities(i);
             if (device.ProductName != deviceName)
                 continue;
 
-            await UseMic(i);
-            break;
+            return await UseMic(i);
         }
+
+        return false;
     }
 }