Added license files and improved audio engine

bkcore/Audio.js

@@ -4,58 +4,139 @@ bkcore.Audio = {};
 bkcore.Audio.sounds = {};
 
 bkcore.Audio.init = function(){
-	bkcore.Audio._ctx = new (window.AudioContext||window.webkitAudioContext);
-	bkcore.Audio._panner = bkcore.Audio._ctx.createPanner();
-	bkcore.Audio._panner.connect(bkcore.Audio._ctx.destination);
+	if(window.AudioContext||window.webkitAudioContext){
+		bkcore.Audio._ctx = new (window.AudioContext||window.webkitAudioContext)();
+		bkcore.Audio._panner = bkcore.Audio._ctx.createPanner();
+		bkcore.Audio._panner.connect(bkcore.Audio._ctx.destination);
+	}
+	else {
+		bkcore.Audio._ctx = null;
+	}
+
 	bkcore.Audio.posMultipler = 1.5;
 };
 
 bkcore.Audio.init();
 
-bkcore.Audio.addSound = function(src, id, loop, callback){
+bkcore.Audio.addSound = function(src, id, loop, callback, usePanner){
 	var ctx = bkcore.Audio._ctx;
 	var audio = new Audio();
-	audio.src = src;
-	audio.addEventListener('canplay', callback, false);
-	audio.loop = loop;
-	audio.load();
 	
 	if(ctx){
-		var mediasrc = ctx.createMediaElementSource(audio);
-		mediasrc.connect(bkcore.Audio._panner);
+		var audio = { src: null, gainNode: null, bufferNode: null, loop: loop };
+		var xhr = new XMLHttpRequest();
+		xhr.responseType = 'arraybuffer';
+
+		xhr.onload = function(){
+			ctx.decodeAudioData(xhr.response, function(b){
+				// Create Gain Node
+				var gainNode = ctx.createGain();
+
+				if(usePanner === true){
+					gainNode.connect(bkcore.Audio._panner);
+				}
+				else {
+					gainNode.connect(ctx.destination);
+				}
+
+				// Add the audio source
+				audio.src = b;
+
+				//Remember the gain node
+				audio.gainNode = gainNode;
+				
+				callback();
+			}, function(e){
+				console.error('Audio decode failed!', e);
+			});
+		};
+
+		xhr.open('GET', src, true);
+		xhr.send(null);
+	}
+	else {
+		// Workaround for old Safari
+		audio.addEventListener('canplay', function(){
+			audio.pause();
+			audio.currentTime = 0;
+
+			callback();
+		}, false);
+
+		audio.autoplay = true;
+		audio.loop = loop;
+		audio.src = src;
 	}
 	
 	bkcore.Audio.sounds[id] = audio;
 };
 
 bkcore.Audio.play = function(id){
-	if(bkcore.Audio.sounds[id].currentTime > 0){
-		bkcore.Audio.sounds[id].pause();
-		bkcore.Audio.sounds[id].currentTime = 0;
+	var ctx = bkcore.Audio._ctx;
+
+	if(ctx){
+		var sound = ctx.createBufferSource();
+		sound.connect(bkcore.Audio.sounds[id].gainNode);
+		
+		sound.buffer = bkcore.Audio.sounds[id].src;
+		sound.loop = bkcore.Audio.sounds[id].loop;
+
+		bkcore.Audio.sounds[id].gainNode.gain.value = 1;
+		bkcore.Audio.sounds[id].bufferNode = sound;
+
+		sound.start ? sound.start(0) : sound.noteOn(0);
+	}
+	else {
+		if(bkcore.Audio.sounds[id].currentTime > 0){
+			bkcore.Audio.sounds[id].pause();
+			bkcore.Audio.sounds[id].currentTime = 0;
+		}
+
+		bkcore.Audio.sounds[id].play();
 	}
-	bkcore.Audio.sounds[id].play();
 };
 
 bkcore.Audio.stop = function(id){
-	bkcore.Audio.sounds[id].pause();
-	bkcore.Audio.sounds[id].currentTime = 0;
+	var ctx = bkcore.Audio._ctx;
+
+	if(ctx){
+		if(bkcore.Audio.sounds[id].bufferNode !== null){
+			bkcore.Audio.sounds[id].bufferNode.disconnect();	
+			bkcore.Audio.sounds[id].bufferNode = null;
+		}
+	}
+	else {
+		bkcore.Audio.sounds[id].pause();
+		bkcore.Audio.sounds[id].currentTime = 0;
+	}
 };
 
-bkcore.Audio.volume = function(id,volume){
-	bkcore.Audio.sounds[id].volume = volume;
+bkcore.Audio.volume = function(id, volume){
+	var ctx = bkcore.Audio._ctx;
+
+	if(ctx){
+		bkcore.Audio.sounds[id].gainNode.gain.value = volume;
+	}
+	else {
+		bkcore.Audio.sounds[id].volume = volume;
+	}
 };
 
 bkcore.Audio.setListenerPos = function(vec){
-	var panner = bkcore.Audio._panner;
-	var vec2 = vec.normalize();
-	panner.setPosition(
-		vec2.x * bkcore.Audio.posMultipler,
-		vec2.y * bkcore.Audio.posMultipler,
-		vec2.z * bkcore.Audio.posMultipler
-	);
+	if(bkcore.Audio._ctx){
+		var panner = bkcore.Audio._panner;
+		var vec2 = vec.normalize();
+		panner.setPosition(
+			vec2.x * bkcore.Audio.posMultipler,
+			vec2.y * bkcore.Audio.posMultipler,
+			vec2.z * bkcore.Audio.posMultipler
+		);
+	}
 };
 
 bkcore.Audio.setListenerVelocity = function(vec){
-	var panner = bkcore.Audio._panner;
-	panner.setVelocity(vec.x, vec.y, vec.z);
+	if(bkcore.Audio._ctx){
+		var panner = bkcore.Audio._panner;
+		panner.setVelocity(vec.x, vec.y, vec.z);
+	}
 };

bkcore/hexgl/HexGL.js

@@ -114,8 +114,8 @@ bkcore.hexgl.HexGL.prototype.reset = function()
 	this.gameplay.start();
 
 	bkcore.Audio.play('bg');
-	bkcore.Audio.volume('wind', 0.05);
 	bkcore.Audio.play('wind');
+	bkcore.Audio.volume('wind', 0.35);
 }
 
 bkcore.hexgl.HexGL.prototype.restart = function()
@@ -173,7 +173,7 @@ bkcore.hexgl.HexGL.prototype.initGameplay = function()
 
 	bkcore.Audio.play('bg');
 	bkcore.Audio.play('wind');
-	bkcore.Audio.volume('wind',0.05);
+	bkcore.Audio.volume('wind', 0.35);
 }
 
 bkcore.hexgl.HexGL.prototype.displayScore = function(f, l)

bkcore/hexgl/ShipControls.js

@@ -628,7 +628,6 @@ bkcore.hexgl.ShipControls.prototype.collisionCheck = function(dt)
 
 	if(collision.r < 255)
 	{
-		if(this.boost > 0) bkcore.Audio.stop('boost');
 		bkcore.Audio.play('crash');
 
 		// Shield

bkcore/hexgl/tracks/Cityscape.js

@@ -87,23 +87,28 @@ bkcore.hexgl.tracks.Cityscape = {
 				sounds: {
 					bg: {
 						src: 'audio/bg.mp3',
-						loop: true
+						loop: true,
+						usePanner: false
 					},
 					crash: {
 						src: 'audio/crash.mp3',
-						loop: false
+						loop: false,
+						usePanner: true
 					},
 					destroyed: {
 						src: 'audio/destroyed.mp3',
-						loop: false
+						loop: false,
+						usePanner: false
 					},
 					boost: {
 						src: 'audio/boost.mp3',
-						loop: false
+						loop: false,
+						usePanner: true
 					},
 					wind: {
 						src: 'audio/wind.mp3',
-						loop: true
+						loop: true,
+						usePanner: true
 					}
 				}
 			});

bkcore/threejs/Loader.js

@@ -91,7 +91,7 @@ bkcore.threejs.Loader.prototype.load = function(data)
 		this.loadImage(i, data.images[i]);
 
 	for(var s in data.sounds)
-		this.loadSound(data.sounds[s].src, s, data.sounds[s].loop);
+		this.loadSound(data.sounds[s].src, s, data.sounds[s].loop, data.sounds[s].usePanner);
 
 	this.progressCallback.call(this, this.progress);
 }