org.eclipse.osbp.utils.ui/src/org/eclipse/osbp/utils/vaadin/beeper/js/BeeperConnector.js

window.org_eclipse_osbp_utils_vaadin_beeper_Beeper = function() {
    var audioCtx = new (window.AudioContext || window.webkitAudioContext || window.audioContext);
    var soundBuffer = null;
    var bufferLoader;
    this.beepSound = function(duration, frequency) {
        var oscillator = audioCtx.createOscillator();
        var gainNode = audioCtx.createGain();
        oscillator.connect(gainNode);
        gainNode.connect(audioCtx.destination);
        if (frequency){
        	oscillator.frequency.value = frequency;
        }
        setTimeout(function(){
        	oscillator.stop();
        	oscillator.disconnect();
        	gainNode.disconnect();
        }, (duration ? duration : 1500));
        oscillator.start();
    };
	function loadSound(url) {
		var request = new XMLHttpRequest();
		request.open('GET', url, true);
		request.responseType = 'arraybuffer';
		// Decode asynchronously
		request.onload = function() {
			audioCtx.decodeAudioData(request.response, function(buffer) {
				var source = audioCtx.createBufferSource(); // creates a sound source
				source.buffer = buffer;               		// tell the source which sound to play
				source.connect(audioCtx.destination);       // connect the source to the context's destination (the speakers)
				source.start(0);                            // play the source now
			}, 
			function(e){"Error with decoding audio data" + e.err}
			);
		}
		request.send();
	}
	this.playSound = function playSound(url) {
		loadSound(url);
//		soundInit();
	}	
	function soundInit() {
		bufferLoader = new BufferLoader(audioCtx, [
				'sounds/baby-babble-1.mp3',
				'sounds/people-cheering.mp3',
				'sounds/y1.mp3',
				'sounds/applause-4.mp3', ], 
			finishedLoading);
		bufferLoader.load();
	}
	function finishedLoading(bufferList) {
		// Create two sources and play them both together.
		var source1 = audioCtx.createBufferSource();
		var source2 = audioCtx.createBufferSource();
		source1.buffer = bufferList[0];
		source2.buffer = bufferList[1];
		
		source1.connect(audioCtx.destination);
		source2.connect(audioCtx.destination);
		source1.start(0);
		source2.start(0);
	}	
};