From 26a85abc9b226ae249742495862bf9e224aed92a Mon Sep 17 00:00:00 2001
From: Yotam Mann <yotammann@gmail.com>
Date: Wed, 12 Mar 2014 16:29:43 -0400
Subject: [PATCH] started renaming process

---
 examples/pingPongDelay.html |   8 +-
 src/GUI/GUI.Bars.js         |   5 +
 src/GUI/GUI.Meter.js        |  92 +++-------------
 src/components/Player.js    |  30 +++---
 src/core/AudioUnit.js       | 203 ++++++++++++++++++++++++++++++++++++
 5 files changed, 241 insertions(+), 97 deletions(-)
 create mode 100644 src/GUI/GUI.Bars.js
 create mode 100644 src/core/AudioUnit.js

diff --git a/examples/pingPongDelay.html b/examples/pingPongDelay.html
index 61933fc6..53897429 100644
--- a/examples/pingPongDelay.html
+++ b/examples/pingPongDelay.html
@@ -5,6 +5,7 @@
 	<script src="http://code.jquery.com/jquery-2.1.0.min.js"></script>
 	<script type="text/javascript" src="../src/core/WebAudio.js"></script>
 	<script type="text/javascript" src="../src/core/Unit.js"></script>
+	<script type="text/javascript" src="../src/core/AudioUnit.js"></script>
 	<script type="text/javascript" src="../src/components/Player.js"></script>
 	<script type="text/javascript" src="../src/components/Meter.js"></script>
 	<script type="text/javascript" src="../src/components/Envelope.js"></script>
@@ -27,15 +28,16 @@
 	<div id='Instructions'>Press 'e'</div>
 	<div id='meter'></div>
 	<script type="text/javascript">
-		var player = new WebAudio.Player("../audio/A3.mp3");
+		var player = new AudioUnit.Player("../audio/A3.mp3");
 		var meter = new WebAudio.Meter(2);
 		var env = new WebAudio.Envelope(.01, .05, 0, 0);
 		var lfo = new WebAudio.LFO(undefined, 1, .5, 1);
 		var noise = new WebAudio.Noise();
 		var feedbackDelay = new WebAudio.PingPongDelay(.25);
-		var meterGui = new WebAudio.GUI.Meter($("#meter")[0], meter);
+		// var meterGui = new WebAudio.GUI.Meter($("#meter")[0], meter);
 		
-		noise.connect(env);
+		//player.connect(env);
+		player.toSpeakers();
 		env.connect(feedbackDelay);
 		feedbackDelay.setFeedback(.5);
 		// lfo.connect(feedbackDelay);
diff --git a/src/GUI/GUI.Bars.js b/src/GUI/GUI.Bars.js
new file mode 100644
index 00000000..539fadd1
--- /dev/null
+++ b/src/GUI/GUI.Bars.js
@@ -0,0 +1,5 @@
+AudioUnit.GUI.Bars = function(){
+	AudioUnit.GUI.call(this);
+}
+
+AudioUnit.extend(AudioUnit.GUI, AudioUnit.GUI.Bars);
\ No newline at end of file
diff --git a/src/GUI/GUI.Meter.js b/src/GUI/GUI.Meter.js
index de3b4999..8140a5c2 100644
--- a/src/GUI/GUI.Meter.js
+++ b/src/GUI/GUI.Meter.js
@@ -1,85 +1,19 @@
-WebAudio.GUI = WebAudio.GUI || {};
-
-WebAudio.GUI.Meter = function(container, meter, height){
-	this.meter = meter;
-	setInterval(this.update.bind(this), 200);
-	this.element = document.createElement("div");
-	container.appendChild(this.element);
-	//some light styling
-	this.element.style.fontFamily = "monospace";
-	this.element.style.whiteSpace = "pre";
+AudioUnit.GUI = function(){
+	this._allGUIs.push(this);
+	this.hello = "hiHI";
 }
 
-WebAudio.GUI.Meter.prototype.update = function(){
-	var text = this.drawBars(this.meter.volume, 40);
-	// text += gainToDb(leftVol).toFixed(1);
-	// text += gainToDb(rightVol).toFixed(1);
-	this.element.textContent = text;
-	if (this.meter.isClipped()){
-		this.element.style.color = "red";
-	} else {
-		this.element.style.color = "inherit";
+AudioUnit.GUI.prototype._allGUIs = [];
+
+AudioUnit.GUI.prototype._doUpdate = function(){
+	requestAnimationFrame(this.doUpdate.bind(this));
+	for (var i = 0; i < this._allGUIs.length; i++){
+		
 	}
 }
 
-WebAudio.GUI.Meter.prototype.slowUpdate = function(){
-	this.meterNumbers = "";
-}
+AudioUnit.GUI.prototype.dispose = function(){
+	//remove the element
 
-
-WebAudio.GUI.Meter.prototype.drawBars = function(volumes, segments){
-	var text = [];
-	for (var channel = 0; channel < volumes.length; channel++){
-		text.push(" _____ ");
-	}
-	text.push("\n");
-	for (var i = 0; i < segments; i++){
-		text.push("|");
-		for (var channel = 0; channel < volumes.length; channel++){
-			var volume = Math.pow(1 - volumes[channel], 6);
-			var volumeSegments = Math.round(volume * segments);
-			if (i < volumeSegments){
-				text.push("     ");
-			} else {
-				if (volumeSegments === segments){
-					text.push("_____");
-				} else {
-					text.push("-----");
-				}
-			} 
-			if (channel == volumes.length - 1){
-				text.push("|\n");
-			} else {
-				text.push("  ");
-			}
-		}
-	}
-	for (var channel = 0; channel < volumes.length; channel++){
-		var db = this.meter.getDb(channel);
-		if (isFinite(db)){
-			if (db > -10){
-				db = " "+db.toFixed(1)+" ";
-			} else {
-				db = " "+db.toFixed(1);
-			}
-		} else {
-			db = " -inf ";
-		}
-		text.push(db + " ");
-	}
-	text.push("\n");
-	// console.log(text);
-	return text.join("");
-}
-
-//@param {number} db
-//@returns {number} gain
-var dbToGain = function(db) {
-	return Math.pow(2, db / 6);
-}
-
-//@param {number} gain
-//@returns {number} db
-var gainToDb = function(gain) {
-	return  20 * (Math.log(gain) / Math.LN10);
-}
+	//remove it from GUIs
+}
\ No newline at end of file
diff --git a/src/components/Player.js b/src/components/Player.js
index 4aeb9bfe..53bbebf8 100644
--- a/src/components/Player.js
+++ b/src/components/Player.js
@@ -4,9 +4,9 @@
 //
 ///////////////////////////////////////////////////////////////////////////////
 
-WebAudio.Player = function(url){
+AudioUnit.Player = function(url){
 	//extend Unit
-	WebAudio.Unit.call(this);
+	AudioUnit.call(this);
 
 	//player vars
 	this.url = url;
@@ -14,19 +14,19 @@ WebAudio.Player = function(url){
 	this.buffer = null;
 }
 
-WebAudio.extend(WebAudio.Player, WebAudio.Unit);
+AudioUnit.extend(AudioUnit.Player, AudioUnit);
 
 //makes an xhr for the buffer at the url
 //invokes the callback at the end
-//@param {function(WebAudio.Player)=} callback
-WebAudio.Player.prototype.load = function(callback){
+//@param {function(AudioUnit.Player)=} callback
+AudioUnit.Player.prototype.load = function(callback){
 	var request = new XMLHttpRequest();
 	request.open('GET', this.url, true);
 	request.responseType = 'arraybuffer';
 	// decode asynchronously
 	var self = this;
 	request.onload = function() {
-		WebAudio.decodeAudioData(request.response, function(b) {
+		self.context.decodeAudioData(request.response, function(b) {
 			self.buffer = b;
 			if (callback){
 				callback(self);
@@ -39,14 +39,14 @@ WebAudio.Player.prototype.load = function(callback){
 }
 
 //play the buffer from start to finish at a time
-WebAudio.Player.prototype.start = function(startTime, offset, duration){
+AudioUnit.Player.prototype.start = function(startTime, offset, duration){
 	if (this.buffer){
 		//default args
-		startTime = this.defaultArgument(startTime, WebAudio.now);
+		startTime = this.defaultArgument(startTime, AudioUnit.now());
 		offset = this.defaultArgument(offset, 0);
 		duration = this.defaultArgument(duration, this.buffer.duration - offset);
 		//make the source
-		this.source = WebAudio.createBufferSource();
+		this.source = this.context.createBufferSource();
 		this.source.buffer = this.buffer;
 		this.source.loop = false;
 		this.source.connect(this.output);
@@ -55,16 +55,16 @@ WebAudio.Player.prototype.start = function(startTime, offset, duration){
 }
 
 //play the buffer from start to finish at a time
-WebAudio.Player.prototype.loop = function(startTime, loopStart, loopEnd, offset, duration){
+AudioUnit.Player.prototype.loop = function(startTime, loopStart, loopEnd, offset, duration){
 	if (this.buffer){
 		//default args
-		startTime = this.defaultArgument(startTime, WebAudio.now);
+		startTime = this.defaultArgument(startTime, this.now());
 		loopStart = this.defaultArgument(loopStart, 0);
 		loopEnd = this.defaultArgument(loopEnd, this.buffer.duration);
 		offset = this.defaultArgument(offset, loopStart);
 		duration = this.defaultArgument(duration, this.buffer.duration - offset);
 		//make/play the source
-		this.source = WebAudio.createBufferSource();
+		this.source = this.context.createBufferSource();
 		this.source.buffer = this.buffer;
 		this.source.loop = true;
 		this.source.loopStart = loopStart;
@@ -75,15 +75,15 @@ WebAudio.Player.prototype.loop = function(startTime, loopStart, loopEnd, offset,
 }
 
 //stop playback
-WebAudio.Player.prototype.stop = function(stopTime){
+AudioUnit.Player.prototype.stop = function(stopTime){
 	if (this.buffer){
-		stopTime = this.defaultArgument(stopTime, WebAudio.now);
+		stopTime = this.defaultArgument(stopTime, this.now());
 		this.source.stop(stopTime);
 	}
 }
 
 //@returns {number} the buffer duration
-WebAudio.Player.prototype.getDuration = function(){
+AudioUnit.Player.prototype.getDuration = function(){
 	if (this.buffer){
 		this.buffer.duration;
 	} else {
diff --git a/src/core/AudioUnit.js b/src/core/AudioUnit.js
new file mode 100644
index 00000000..3c2fa88f
--- /dev/null
+++ b/src/core/AudioUnit.js
@@ -0,0 +1,203 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+//	AUDIO UNIT
+//
+///////////////////////////////////////////////////////////////////////////////
+
+(function(global){
+	
+	//////////////////////////////////////////////////////////////////////////
+	//	WEB AUDIO CONTEXT
+	///////////////////////////////////////////////////////////////////////////
+
+	//ALIAS
+	if (!global.AudioContext){
+		global.AudioContext = global.webkitAudioContext;
+	} 
+
+	var audioContext;
+	if (global.AudioContext){
+		audioContext = new global.AudioContext();
+	}
+
+	//SHIMS////////////////////////////////////////////////////////////////////
+
+	if (typeof audioContext.createGain !== "function"){
+		audioContext.createGain = audioContext.createGainNode;
+	}
+	if (typeof audioContext.createDelay !== "function"){
+		audioContext.createDelay = audioContext.createDelayNode;
+	}
+	if (typeof AudioBufferSourceNode.prototype.start !== "function"){
+		AudioBufferSourceNode.prototype.start = AudioBufferSourceNode.prototype.noteGrainOn;
+	}
+	if (typeof AudioBufferSourceNode.prototype.stop !== "function"){
+		AudioBufferSourceNode.prototype.stop = AudioBufferSourceNode.prototype.noteOff;
+	}
+	if (typeof OscillatorNode.prototype.start !== "function"){
+		OscillatorNode.prototype.start = OscillatorNode.prototype.noteOn;
+	}
+	if (typeof OscillatorNode.prototype.stop !== "function"){
+		OscillatorNode.prototype.stop = OscillatorNode.prototype.noteOff;	
+	}
+
+	///////////////////////////////////////////////////////////////////////////
+	//
+	//	AUDIO UNIT
+	//
+	///////////////////////////////////////////////////////////////////////////
+
+	var AudioUnit = function(){
+		this.context = audioContext;
+		this.input = audioContext.createGain();
+		this.output = audioContext.createGain();
+	}
+
+	///////////////////////////////////////////////////////////////////////////
+	//	STATIC VARS
+	///////////////////////////////////////////////////////////////////////////
+
+	AudioUnit.prototype.fadeTime = .001; //1ms
+	AudioUnit.prototype.bufferSize = 1024; //default buffer size
+
+	///////////////////////////////////////////////////////////////////////////
+	//	CLASS METHODS
+	///////////////////////////////////////////////////////////////////////////
+
+	//@returns {number} the currentTime from the AudioContext
+	AudioUnit.prototype.now = function(){
+		return audioContext.currentTime;
+	}
+
+	//@param {AudioParam | AudioUnit} unit
+	AudioUnit.prototype.connect = function(unit){
+		if (unit.input && unit.input instanceof GainNode){
+			this.output.connect(unit.input);
+		} else {
+			this.output.connect(unit);
+		}
+	}
+	
+	//connect together an array of units in series
+	//@param {...AudioParam | AudioUnit} units
+	AudioUnit.prototype.chain = function(){
+		if (arguments.length > 1){
+			var currentUnit = arguments[0];
+			for (var i = 1; i < arguments.length; i++){
+				var toUnit = arguments[i];
+				if (toUnit.input && toUnit.input instanceof GainNode){
+					currentUnit.connect(toUnit.input);
+				} else {
+					currentUnit.connect(toUnit);
+				}
+				currentUnit = toUnit;
+			}
+		}
+	}
+
+	//set the output volume
+	//@param {number} vol
+	AudioUnit.prototype.setVolume = function(vol){
+		this.output.gain.value = vol;
+	}
+
+	//fade the output volume
+	//@param {number} value
+	//@param {number=} duration (in seconds)
+	AudioUnit.prototype.fadeTo = function(value, duration){
+		this.defaultArgument(duration, this.fadeTime);
+		this.rampToValue(this.output.gain, value, duration);
+	}
+
+	//tear down a node
+	AudioUnit.prototype.tearDown = function(){
+		//go through all of the attributes, if any of them has a disconnect function, call it	
+	}
+
+	///////////////////////////////////////////////////////////////////////////
+	//	UTILITIES / HELPERS
+	///////////////////////////////////////////////////////////////////////////
+
+	//ramps to value linearly starting now
+	//@param {AudioParam} audioParam
+	//@param {number} value
+	//@param {number=} duration (in seconds)
+	AudioUnit.prototype.rampToValue = function(audioParam, value, duration){
+		var currentValue = audioParam.value;
+		var now = this.now();
+		duration = this.defaultArgument(duration, this.fadeTime);
+		audioParam.setValueAtTime(currentValue, now);
+		audioParam.linearRampToValueAtTime(value, now + duration);
+	}
+
+	//ramps to value exponentially starting now
+	//@param {AudioParam} audioParam
+	//@param {number} value
+	//@param {number=} duration (in seconds)
+	AudioUnit.prototype.exponentialRampToValue = function(audioParam, value, duration){
+		var currentValue = audioParam.value;
+		var now = this.now();
+		audioParam.setValueAtTime(currentValue, now);
+		audioParam.exponentialRampToValueAtTime(value, now + duration);
+	}
+
+	//if the given argument is undefined, go with the default
+	//@param {*} given
+	//@param {*} fallback
+	//@returns {*}
+	AudioUnit.prototype.defaultArgument = function(given, fallback){
+		return typeof(given) !== 'undefined' ? given : fallback;
+	}
+
+	//@param {number} percent (0-1)
+	//@returns {number} the equal power gain
+	//good for cross fades
+	AudioUnit.prototype.equalPowerGain = function(percent){
+		return Math.sin((percent) * 0.5*Math.PI);
+	}
+
+	//@param {number} db
+	//@returns {number} gain
+	AudioUnit.prototype.dbToGain = function(db) {
+		return Math.pow(2, db / 6);
+	}
+
+	//@param {number} gain
+	//@returns {number} db
+	AudioUnit.prototype.gainToDb = function(gain) {
+		return  20 * (Math.log(gain) / Math.LN10);
+	}
+
+	//@param {AudioParam|AudioUnit=} unit
+	AudioUnit.prototype.toSpeakers = function(unit){
+		unit = this.defaultArgument(unit, this.output);
+		unit.connect(audioContext.destination);
+	}
+
+	///////////////////////////////////////////////////////////////////////////
+	//	STATIC METHODS
+	///////////////////////////////////////////////////////////////////////////
+	
+	//A extends B
+	AudioUnit.extend = function(A, B){
+		A.prototype = new B();
+		A.prototype.constructor = A;
+	}
+
+	AudioUnit.muteAll = function(){
+
+	}
+
+	AudioUnit.unmuteAll = function(){
+
+	}
+
+
+	AudioUnit.setGlobalVolume = function(){
+		
+	}
+
+	//make it global
+	global.AudioUnit = AudioUnit;
+
+})(window);