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handlemicrophone.js
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handlemicrophone.js
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/**
* Copyright 2015 IBM Corp. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http:https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* global $ */
'use strict';
var initSocket = require('./socket').initSocket;
var display = require('./views/displaymetadata');
exports.handleMicrophone = function(token, model, mic, callback) {
if (model.indexOf('Narrowband') > -1) {
var err = new Error('Microphone transcription cannot accomodate narrowband models, ' +
'please select another');
callback(err, null);
return false;
}
$.publish('clearscreen');
// Test out websocket
var baseString = '';
var baseJSON = '';
$.subscribe('showjson', function() {
var $resultsJSON = $('#resultsJSON');
$resultsJSON.val(baseJSON);
});
var keywords = display.getKeywordsToSearch();
// var keywords_threshold = keywords.length == 0 ? null : 0.01;
// var keywords_threshold = 0.0
var options = {};
options.token = token;
options.message = {
'action': 'start',
'content-type': 'audio/l16;rate=16000',
'interim_results': true,
'speaker_labels': true,
'continuous': true,
'word_confidence': true,
'timestamps': true,
'max_alternatives': 3,
'inactivity_timeout': 600,
'word_alternatives_threshold': 0.001,
// 'keywords_threshold': keywords_threshold,
'keywords': keywords,
'smart_formatting': true
};
options.model = model;
function onOpen(socket) {
console.log('Mic socket: opened');
callback(null, socket);
}
function onListening(socket) {
mic.onAudio = function(blob) {
if (socket.readyState < 2) {
socket.send(blob);
}
};
}
function onMessage(msg) {
if (msg.results) {
// Convert to closure approach
baseString = display.showResult(msg, baseString, model);
baseJSON = JSON.stringify(msg, null, 2);
display.showJSON(baseJSON);
}
}
function onError() {
console.log('Mic socket err: ', err);
}
function onClose(evt) {
console.log('Mic socket close: ', evt);
}
initSocket(options, onOpen, onListening, onMessage, onError, onClose);
};