Mirrors/Tone.js
2
0
Fork 0
mirror of https://github.com/Tonejs/Tone.js synced 2024-11-15 08:17:07 +00:00
Code Issues Projects Releases Packages Wiki Activity

extended native AudioNode.connect + added relative and notation timing

Browse source
This commit is contained in:
Yotam Mann 2014-03-16 14:58:03 -04:00
parent 9a190abac1
commit fc4e910ebf
1 changed files with 64 additions and 22 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

86
src/core/Tone.js
View file

@ -40,6 +40,15 @@
if (typeof OscillatorNode.prototype.stop !== "function"){
OscillatorNode.prototype.stop = OscillatorNode.prototype.noteOff;
}
//extend the connect function to include Tones
AudioNode.prototype._nativeConnect = AudioNode.prototype.connect;
AudioNode.prototype.connect = function(B){
if (B.input && B.input instanceof GainNode){
this._nativeConnect(B.input);
} else {
this._nativeConnect.apply(this, arguments);
}
}
///////////////////////////////////////////////////////////////////////////
// TONE
@ -70,28 +79,13 @@
//@param {AudioParam | Tone} unit
Tone.prototype.connect = function(unit){
this._connect(this, unit);
this.output.connect(unit);
}
//disconnect the output
Tone.prototype.disconnect = function(){
this.output.disconnect();
}
//@private internal connect
//@param {AudioNode|Tone} A
//@param {AudioNode|Tone} B
Tone.prototype._connect = function(A, B){
var compA = A;
if (A.output && A.output instanceof GainNode){
compA = A.output;
}
var compB = B;
if (B.input && B.input instanceof GainNode){
compB = B.input;
}
compA.connect(compB);
}
//connect together an array of units in series
//@param {...AudioParam | Tone} units
@ -100,7 +94,7 @@
var currentUnit = arguments[0];
for (var i = 1; i < arguments.length; i++){
var toUnit = arguments[i];
this._connect(currentUnit, toUnit);
currentUnit.connect(toUnit);
currentUnit = toUnit;
}
}
@ -205,17 +199,65 @@
return (input - inputMin) / (inputMax - inputMin);
}
//@param {AudioParam|Tone=} unit
Tone.prototype.toMaster = function(unit){
unit = this.defaultArg(unit, this.output);
this._connect(unit, Tone.Master);
//@param {AudioNode|Tone=} unit
Tone.prototype.toMaster = function(node){
node = this.defaultArg(node, this.output);
node.connect(Tone.Master);
}
///////////////////////////////////////////////////////////////////////////
// MUSICAL TIMING
//
// numbers are passed through
// musical timing will be evaluated based on the passed in bpm
// notation values are 4n = quarter, 8t = 8th note tripplet
// '+' prefixed values will be "now" relative
///////////////////////////////////////////////////////////////////////////
//@param {number|string} timing
//@param {number=} bpm
//@returns {number} the time (clock relative)
Tone.prototype.parseTime = function(time, bpm){
if (typeof time === "number"){
return time;
} else if (typeof time === "string"){
var plusTime = 0;
if(time.charAt(0) === "+") {
plusTime = this.now();
time = time.slice(1);
}
//test if it's a beat format
if (this.isNotation(time)){
return this.parseNotation(time, bpm) + plusTime;
} else {
return parseFloat(time) + plusTime;
}
}
}
Tone.prototype.isNotation = (function(){
var notationFormat = new RegExp(/[0-9]+[nt]$/);
return function(note){
return notationFormat.test(note);
}
})();
//@param {string} notation
//@param {number=} bpm
//@returns {number} time duration of notation
Tone.prototype.parseNotation = function(notation, bpm){
bpm = this.defaultArg(bpm, 120);
var measureInSeconds = (60 / bpm) * 4;
var subdivision = parseInt(notation, 10);
var lastLetter = notation.slice(-1);
if (lastLetter === "t"){
return (measureInSeconds / subdivision) * 2/3;
} else if (lastLetter === 'n'){
return measureInSeconds / subdivision;
} else {
return 0;
}
}
///////////////////////////////////////////////////////////////////////////
// STATIC METHODS