watson-speech
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IBM Watson Speech to Text and Text to Speech SDK for web browsers.
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<h1 class="page-title">Source: recognize-element.js</h1>
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<pre class="prettyprint source linenums"><code>/**
* 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://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.
*/
'use strict';
var MediaElementAudioStream = require('./media-element-audio-stream');
var L16 = require('./webaudio-l16-stream');
var RecognizeStream = require('./recognize-stream.js');
var FormatStream = require('./format-stream.js');
/**
* Recognize audio from a <audio> or <video> element
*
* @param {Object} options - Also passed to {MediaElementAudioStream} and to {RecognizeStream}
* @param {String} options.token - Auth Token - see https://github.com/watson-developer-cloud/node-sdk#authorization
* @param {MediaElement} options.element - the <video> or <audio> element to play
* @param {Boolena} [options.format=true] - pipe the text through a {FormatStream} which performs light formatting
*
* @returns {RecognizeStream}
*/
module.exports = function recognizeElement(options) {
if (!options || !options.token) {
throw new Error("WatsonSpeechToText: missing required parameter: opts.token");
}
options['content-type'] = 'audio/l16;rate=16000'; // raw wav audio (no header)
var recognizeStream = new RecognizeStream(options);
var sourceStream = new MediaElementAudioStream(options.element , options);
var stream = sourceStream
.pipe(new L16())
.pipe(recognizeStream);
if (options.format !== false) {
stream = stream.pipe(new FormatStream(options));
}
recognizeStream.on('stop', sourceStream.stop.bind(sourceStream));
return stream;;
};
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<h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="FormatStream.html">FormatStream</a></li><li><a href="MediaElementAudioStream.html">MediaElementAudioStream</a></li><li><a href="RecognizeStream.html">RecognizeStream</a></li><li><a href="TimingStream.html">TimingStream</a></li><li><a href="WebAudioL16Stream.html">WebAudioL16Stream</a></li></ul><h3>Events</h3><ul><li><a href="RecognizeStream.html#event:connection-close">connection-close</a></li><li><a href="RecognizeStream.html#event:data">data</a></li><li><a href="RecognizeStream.html#event:error">error</a></li><li><a href="RecognizeStream.html#event:results">results</a></li></ul>
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