Sample code for KeenASR speech recognition engine usage from Unity

TestKeenASR-Unity.cs

using UnityEngine;
using System.Collections;
using KeenResearch;

public class TestKeenASR : MonoBehaviour {
	// Use this for initialization
  void Start () {
    Debug.Log ("Initializing KeenASR Plugin");
    KeenASR.SetLogLevel (KeenASR.LogLevelDebug);
    KeenASR.Initialize ("librispeech-nnet2-en-us");			
    KeenASR recognizer = KeenASR.Instance;
			
    string dgName = "numbers"; // this will be decoding graph name, which we case use later on 
    if (!recognizer.CustomDecodingGraphWithNameExists (dgName)) {
      Debug.Log ("Creating decoding graph");
      string[] phrases = new string[] { "ONE", "TWO", "THREE", "FOUR", "FIVE", "SIX", "SEVEN", "EIGHT", "NINE", "TEN" };
      recognizer.CreateCustomDecodingGraphFromSentences (dgName, phrases);
    } else {
      Debug.Log ("Decoding graph already exists (IF YOU CHANGE THE WORDLIST, YOU WILL NEED TO RECREATE THE DECODING GRAPH");
    }

    recognizer.PrepareForListeningWithCustomDecodingGraph(dgName);

    // when set to true, SDK will create audio recordings capturing audio that was 
    // passed to the engine (between start and end listening)
    // you can get the file pat via GetLastRecordingFilename(), once the recognizer 
    // stopped listening (e.g. in onFinalASRResultReceived callback
    recognizer.SetCreateAudioRecordings (true);

    // final result will be reported after 1sec of end silence
    recognizer.SetVADParameter (KeenASR.VadParamTimeoutEndSilenceForGoodMatch, 1f);
    recognizer.SetVADParameter (KeenASR.VadParamTimeoutEndSilenceForAnyMatch, 1f);

    recognizer.onFinalASRResultReceived += FinalASRResult;
    recognizer.onPartialASRResultReceived += PartialASRResult;
  }
	
  // Update is called once per frame
  void Update () {
    if (KeenASR.Instance.IsListening ()) {
      // here we just show how input levels change; you would poll the input levels somewhere else
      // and use it to drive a UI component (not print in the log file)
      //Debug.Log ("\tLevel: " + KeenASR.Instance.InputLevel ());
    }
  }

  public void FinalASRResult(ASRResult result) {
    Debug.Log ("FINAL RESULT:" + result.cleanText + ", conf: " + result.confidence + ", numWords: " + result.words.Length);
    foreach (ASRWord word in result.words) {
      if (word.isTag)
        Debug.Log ("Word " + word.text + " is a tag word");
      if (word.confidence < 0.8)
        Debug.Log ("Word " + word.text + " has LOW confidence");
    }
    // For testing/demo purposes only; it's unlikely you would need to call this method from within
    // the FinalASRResult callback
    Debug.Log("final callback isListening returns: " + KeenASR.Instance.IsListening());
    Debug.Log("Audio file saved in: " + KeenASR.Instance.GetLastRecordingFilename());

  }

  public void PartialASRResult(string result) {
    Debug.Log ("PARTIAL RESULT:" + result);
    // For testing/demo purposes only; it's unlikely you would need to call this method from within
    // the FinalASRResult callback
    Debug.Log("partial callback, isListening returns: " + KeenASR.Instance.IsListening());
  }

  void OnGUI() {
    if (GUI.Button(new Rect(100, 450, 200, 100), "Start Listening")) {
#if UNITY_IPHONE
      KeenASR.Instance.StartListening();
 #endif
    }	
  }
}