translation.js

// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license.

// pull in the required packages.
var sdk = require("microsoft-cognitiveservices-speech-sdk");

(function() {
"use strict";

module.exports = {
  main: function(settings, audioStream) {

    // now create the audio-config pointing to our stream and
    // the speech config specifying the language.
    var audioConfig = sdk.AudioConfig.fromStreamInput(audioStream);
    var translationConfig = sdk.SpeechTranslationConfig.fromSubscription(settings.subscriptionKey, settings.serviceRegion);

    // setting the recognition language to English.
    translationConfig.speechRecognitionLanguage = settings.language;

    // target language is German.
    translationConfig.addTargetLanguage("de-DE");

    // create the translation recognizer.
    var recognizer = new sdk.TranslationRecognizer(translationConfig, audioConfig);

    // Before beginning speech recognition, setup the callbacks to be invoked when an event occurs.

    // The event recognizing signals that an intermediate recognition result is received.
    // You will receive one or more recognizing events as a speech phrase is recognized, with each containing
    // more recognized speech. The event will contain the text for the recognition since the last phrase was recognized.
    // Both the source language text and the translation text(s) are available.
    recognizer.recognizing = function (s, e) {
        var str = ("(recognizing) Reason: " + sdk.ResultReason[e.result.reason] + " Text: " + e.result.text + " Translations:");

        var language = "de";
        str += " [" + language + "] " + e.result.translations.get(language);

        console.log(str);
    };

    // The event recognized signals that a final recognition result is received.
    // This is the final event that a phrase has been recognized.
    // For continuous recognition, you will get one recognized event for each phrase recognized.
    // Both the source language text and the translation text(s) are available.
    recognizer.recognized = function (s, e) {
        var str = "\r\n(recognized)  Reason: " + sdk.ResultReason[e.result.reason] + " Text: " + e.result.text + " Translations:";

        var language = "de";
        str += " [" + language + "] " + e.result.translations.get(language);
        str += "\r\n";

        console.log(str);
    };
    
    // start the recognizer and wait for a result.
    recognizer.recognizeOnceAsync(
      function (result) {
        recognizer.close();
        recognizer = undefined;
      },
      function (err) {
        recognizer.close();
        recognizer = undefined;
      });
  }

}
}());