我通过这个将语音集成到文本中应用程序教程 http://www.appcoda.com/siri-speech-framework/。我面临的问题是我希望用户可以自己编写/编辑某些内容,但 SFSpeechAudioBufferRecognitionRequest 不会考虑用户输入的内容。
在 SFSpeechAudioBufferRecognitionRequest 中发送用户键入的输入的方法是什么,或者在发送新请求之前清除 SFSpeechAudioBufferRecognitionRequest 输入参数的方法是什么。
提前致谢。
以下是我用来创建认可请求的内容:
func recordSpeech() throws {
// Cancel the previous task if it's running.
if let recognitionTask = recognitionTask {
recognitionTask.cancel()
self.recognitionTask = nil
}
isRecognizing = true
self.delegate?.recognitionStarted(sender: self)
let audioSession = AVAudioSession.sharedInstance()
try audioSession.setCategory(AVAudioSessionCategoryRecord)
try audioSession.setMode(AVAudioSessionModeMeasurement)
try audioSession.setActive(true, with: .notifyOthersOnDeactivation)
recognitionRequest = SFSpeechAudioBufferRecognitionRequest()
guard let inputNode = audioEngine.inputNode else {
print("there was an error in audioEngine.inputNode")
fatalError("Audio engine has no input node")
}
guard let recognitionRequest = recognitionRequest else {
fatalError("Unable to create a SFSpeechAudioBufferRecognitionRequest object")
}
// Configure request so that results are returned before audio recording is finished
recognitionRequest.shouldReportPartialResults = true
// A recognition task represents a speech recognition session.
// We keep a reference to the task so that it can be cancelled.
recognitionTask = recognizer.recognitionTask(with: recognitionRequest) { result, error in
func finalizeResult() {
self.audioEngine.stop()
inputNode.removeTap(onBus: 0)
self.recognitionRequest = nil
self.recognitionTask = nil
}
guard error == nil else {
finalizeResult()
return
}
if !(result?.isFinal)! {
guard self.isRecognizing else {
return
}
// process partial result
self.processRecognition(result: result)
} else {
finalizeResult()
}
}
let recordingFormat = inputNode.outputFormat(forBus: 0)
inputNode.installTap(onBus: 0, bufferSize: 1024, format: recordingFormat) { (buffer, when) in
self.recognitionRequest?.append(buffer)
}
audioEngine.prepare()
do {
try audioEngine.start()
} catch let error as NSError {
print("audio engine start error=\(error)")
}
}
要随时取消或停止此操作,我使用以下方法:
@objc func stopRecording() {
isRecognizing = false
audioEngine.stop()
recognitionRequest?.endAudio()
self.delegate?.recognitionFinished()
}
func cancelRecording() {
isRecognizing = false
audioEngine.stop()
recognitionTask?.cancel()
self.delegate?.recognitionFinished()
}
我会设置一个按钮来触发语音识别并将其绑定到recordSpeech()
。然后设置一个按钮并将其绑定到stopRecording()
。当用户停止请求时,result?.isfinal
将为真,并且您知道这是第一个输入的最终文本。然后,用户可以再次使用语音输入来输入第二组语音。
我的大部分代码来自 2016 年 WWDC 语音识别会议,您可以在这里找到:
成绩单 http://devstreaming.apple.com/videos/wwdc/2016/509n1cnykqms19r9jyp/509/509_speech_recognition_api.pdf
Video https://developer.apple.com/videos/play/wwdc2016/509/
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