JS for Speech to text: /* Extension using the JavaScript Speech API for speech to text */ /* Sayamindu Dasgupta <sayamindu@media.mit.edu>, April 2014 */ new (function() { var ext = this; var recognized_speech = ''; ext.recognize_speech = function (callback) { var recognition = new webkitSpeechRecognition(); recognition.onresult = function(event) { if (event.results.length > 0) { recognized_speech = event.results[0][0].transcript; if (typeof callback=="function") callback(); } }; recognition.start(); }; ext.recognized_speech = function () {return recognized_speech;}; ext._shutdown = function() {}; ext._getStatus = function() { if (window.webkitSpeechRecognition === undefined) { return {status: 1, msg: 'Your browser does not support speech recognition. Try using Google Chrome.'}; } return {status: 2, msg: 'Ready'}; }; var descriptor = { blocks: [ ['w', 'wait and recognize speech', 'recognize_speech'], ['r', 'recognized speech', 'recognized_speech'] ], }; ScratchExtensions.register('Speech To Text', descriptor, ext); })(); JS for text to speech: /* Extension using the JavaScript Speech API for text to speech */ /* Sayamindu Dasgupta <sayamindu@media.mit.edu>, April 2014 */ new (function() { var ext = this; /*function _get_voices() { var ret = []; var voices = speechSynthesis.getVoices(); for(var i = 0; i < voices.length; i++ ) { ret.push(voices[i].name); console.log(voices.toString()); } return ret; } ext.set_voice = function() { };*/ ext.speak_text = function (text, callback) { var u = new SpeechSynthesisUtterance(text.toString()); u.onend = function(event) { if (typeof callback=="function") callback(); }; speechSynthesis.speak(u); }; ext._shutdown = function() {}; ext._getStatus = function() { if (window.SpeechSynthesisUtterance === undefined) { return {status: 1, msg: 'Your browser does not support text to speech. Try using Google Chrome or Safari.'}; } return {status: 2, msg: 'Ready'}; }; var descriptor = { blocks: [ //['', 'set voice to %m.voices', 'set_voice', ''], ['w', 'speak %s', 'speak_text', 'Hello!'], ], /*menus: { voices: _get_voices(), },*/ }; ScratchExtensions.register('Text to Speech', descriptor, ext); })();
