在我的一个应用程序中,我正在使用Speech框架将用户的语音转换为Text。
基本上,我希望我的应用程序可以通过一些命令免提使用。
因此,Apple每小时只能处理1000个请求,而SFSpeechRecognitionTask仅持续大约1分钟。
我希望SFSpeechRecognitionTask应该活着并保持识别声音。 那么,使用代码的最佳方法是什么。电池电量是否过多?如果我每隔1分钟重新启动SFSpeechRecognitionTask一次?
我已经完成了如下代码来开始检测语音,并且将在1分钟后停止。
如果有办法实现,请帮助我。
func startRecording() {
if recognitionTask != nil {
recognitionTask?.cancel()
recognitionTask = nil
}
let audioSession = AVAudioSession.sharedInstance()
do {
try audioSession.setCategory(AVAudioSessionCategoryRecord)
try audioSession.setMode(AVAudioSessionModeMeasurement)
try audioSession.setActive(true, with: .notifyOthersOnDeactivation)
} catch {
print("audioSession properties weren't set because of an error.")
}
recognitionRequest = SFSpeechAudioBufferRecognitionRequest()
guard let inputNode = audioEngine.inputNode else {
fatalError("Audio engine has no input node")
}
guard let recognitionRequest = recognitionRequest else {
fatalError("Unable to create an SFSpeechAudioBufferRecognitionRequest object")
}
recognitionRequest.shouldReportPartialResults = true
recognitionTask = speechRecognizer?.recognitionTask(with: recognitionRequest, resultHandler: { (result, error) in
var isFinal = false
if result != nil {
if self.speechTimer != nil
{
if (self.speechTimer?.isValid)!
{
self.speechTimer?.invalidate()
}
self.speechTimer = nil;
}
print(result?.bestTranscription.formattedString as Any)
self.speechTimer = Timer.scheduledTimer(withTimeInterval: 2.0, repeats: false, block: { (timer) in
print("Recognition task restart")
})
isFinal = (result?.isFinal)!
if isFinal {
print("Final String: \(result?.bestTranscription.formattedString ?? "No string")")
}
}
})
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 {
print("audioEngine couldn't start because of an error.")
}
}