stopContinuousRecognition() 阻止应用程序 5-7 秒

Question

我正在尝试使用 Swift 在 iOS 项目中使用 Azure Speech SDK 实现语音识别，我运行遇到语音识别完成函数 (stopContinuousRecognition()) 阻止应用程序 UI 几秒钟，但没有内存或处理器负载或泄漏。我试图将此功能移动到 DispatchQueue.main.async {}，但没有结果。也许有人遇到过这样的问题？是否有必要将它放在一个单独的线程中，为什么函数需要这么长时间才能完成？

编辑：很难提供工作示例，但基本上我是在按下按钮时调用此函数：

 private func startListenAzureRecognition(lang:String) {
    let audioFormat = SPXAudioStreamFormat.init(usingPCMWithSampleRate: 8000, bitsPerSample: 16, channels: 1)
    azurePushAudioStream = SPXPushAudioInputStream(audioFormat: audioFormat!)
    let audioConfig = SPXAudioConfiguration(streamInput: azurePushAudioStream!)!
    var speechConfig: SPXSpeechConfiguration?

    do {
      let sub = "enter your code here"
      let region = "enter you region here"
      try speechConfig = SPXSpeechConfiguration(subscription: sub, region: region)
      speechConfig!.enableDictation();
      speechConfig?.speechRecognitionLanguage = lang
    } catch {
      print("error \(error) happened")
      speechConfig = nil
    }

    self.azureRecognition = try! SPXSpeechRecognizer(speechConfiguration: speechConfig!, audioConfiguration: audioConfig)
    
    self.azureRecognition!.addRecognizingEventHandler() {reco, evt in
      if (evt.result.text != nil && evt.result.text != "") {
         print(evt.result.text ?? "no result")
      }
    }
    self.azureRecognition!.addRecognizedEventHandler() {reco, evt in
      if (evt.result.text != nil && evt.result.text != "") {
        print(evt.result.text ?? "no result")
      }
    }
    do {
     try! self.azureRecognition?.startContinuousRecognition()
    } catch {
      print("error \(error) happened")
    }
  }

当我再次按下按钮停止识别时，我调用了这个函数：

private func stopListenAzureRecognition(){
   DispatchQueue.main.async {
      print("start")
      // app blocks here
      try! self.azureRecognition?.stopContinuousRecognition()
      self.azurePushAudioStream!.close()
      self.azureRecognition = nil
      self.azurePushAudioStream = nil
      print("stop")
    }
  }

我还使用来自麦克风的原始音频数据（recognizeOnce 非常适合第一个短语，所以音频数据一切正常）

Answer 1

尝试先关闭流再停止连续识别：

azurePushAudioStream!.close()
try! azureRecognition?.stopContinuousRecognition()
azureRecognition = nil
azurePushAudioStream = nil

您甚至不需要异步执行。

至少这对我有用。

stopContinuousRecognition() 阻止应用程序 5-7 秒

stopContinuousRecognition() blocks the app for 5-7 seconds

speech-recognition

azure

speech-to-text

swift