import UIKit
import Speech
class ViewController: UIViewController, SFSpeechRecognizerDelegate ,AVSpeechSynthesizerDelegate {
@IBOutlet weak var textView: UITextView!
private let speechRecognizer = SFSpeechRecognizer(locale: Locale.init(identifier: "en-US"))!
private var recognitionRequest: SFSpeechAudioBufferRecognitionRequest?
private var recognitionTask: SFSpeechRecognitionTask?
private let audioEngine = AVAudioEngine()
private var audio : AVAudioInputNode? = nil
var audioSession : AVAudioSession? = nil
override func viewDidLoad() {
super.viewDidLoad()
self.getSpeech(asSpeach: "how are you ?")
speechRecognizer.delegate = self
SFSpeechRecognizer.requestAuthorization { (authStatus) in
var isButtonEnabled = false
switch authStatus {
case .authorized:
isButtonEnabled = true
case .denied:
isButtonEnabled = false
print("User denied access to speech recognition")
case .restricted:
isButtonEnabled = false
print("Speech recognition restricted on this device")
case .notDetermined:
isButtonEnabled = false
print("Speech recognition not yet authorized")
}
}
}
func endAudio()
{
if audioEngine.isRunning {
AudioOutputUnitStop((audioEngine.inputNode?.audioUnit)!)
AudioUnitUninitialize((audioEngine.inputNode?.audioUnit)!)
audioEngine.stop()
}
}
func startRecording() {
if recognitionTask != nil {
recognitionTask?.cancel()
recognitionTask = nil
}
AudioOutputUnitStop((audioEngine.inputNode?.audioUnit)!)
AudioUnitUninitialize((audioEngine.inputNode?.audioUnit)!)
audioSession = AVAudioSession.sharedInstance()
do {
try audioSession?.setCategory(AVAudioSessionCategoryPlayAndRecord)
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 {
print("Audio engine has no input node")
}
audio=inputNode
audio?.removeTap(onBus: 2)
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 {
self.textView.text = result?.bestTranscription.formattedString
isFinal = (result?.isFinal)!
if self.textView.text == "Fine" || self.textView.text == "Find"
{
self.audioEngine.stop()
self.textView.text = ""
DispatchQueue.main.asyncAfter(deadline: .now() + 0.2) {
self.getSpeech(asSpeach: "how are you ?")
}
}
}
if error != nil || isFinal {
self.audioEngine.stop()
inputNode.removeTap(onBus: 2)
self.recognitionRequest = nil
self.recognitionTask = nil
}
})
let recordingFormat = inputNode.outputFormat(forBus: 2)
inputNode.installTap(onBus: 2, 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.")
}
textView.text = "Say something, I'm listening!"
}
func speechRecognizer(_ speechRecognizer: SFSpeechRecognizer, availabilityDidChange available: Bool) {
if available {
//something
} else {
//else thing
}
}
func getSpeech(asSpeach:String)
{
audioSession = AVAudioSession.sharedInstance()
do {
try audioSession?.overrideOutputAudioPort(.speaker)
} catch {
print(error.localizedDescription)
}
let synthesizer = AVSpeechSynthesizer()
let utterance = AVSpeechUtterance(string: asSpeach)
utterance.rate = AVSpeechUtteranceDefaultSpeechRate
synthesizer.delegate=self
synthesizer.speak(utterance)
}
public func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, didFinish utterance: AVSpeechUtterance)
{
audioEngine.stop()
do {
try audioSession?.setActive(false)
}
catch {
print("error.localizedDescription")
print(error.localizedDescription)
}
print("speech synthesizer ended")
if(audioEngine.isRunning)
{
endAudio()
}
DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
self.startRecording()
}
}
}
As requirement first dictet one string and if the string is a keyword (as per business rule) dictet again but getting crash think the crash is for mismatching the audioformat for dictet and speech .
The error message is
ERROR: [0x1b2a4cb40] >avae> AVAudioIONodeImpl.mm:884: SetOutputFormat: required condition is false: format.sampleRate == hwFormat.sampleRate
Terminating app due to uncaught exception 'com.apple.coreaudio.avfaudio', reason: 'required condition is false: format.sampleRate == hwFormat.sampleRate'
Think the problem is with AVAudioSession please suggest i am trying many times but dont have a luck till now
