Initial import of sample extensions

speech_to_text_extension.js

@@ -0,0 +1,39 @@
+/* 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);
+})();