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tuna.js
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tuna.js
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/*
Copyright (c) 2012 DinahMoe AB
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,
modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software
is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
//Originally written by Alessandro Saccoia, Chris Coniglio and Oskar Eriksson
(function (window) {
var userContext, userInstance, Tuna = function (context) {
if (! window.AudioContext) {
window.AudioContext = window.webkitAudioContext;
}
if(!context) {
console.log("tuna.js: Missing audio context! Creating a new context for you.");
context = window.AudioContext && (new window.AudioContext());
}
userContext = context;
userInstance = this;
},
version = "0.1",
set = "setValueAtTime",
linear = "linearRampToValueAtTime",
pipe = function (param, val) {
param.value = val;
},
Super = Object.create(null, {
activate: {
writable: true,
value: function (doActivate) {
if(doActivate) {
this.input.disconnect();
this.input.connect(this.activateNode);
if(this.activateCallback) {
this.activateCallback(doActivate);
}
} else {
this.input.disconnect();
this.input.connect(this.output);
}
}
},
bypass: {
get: function () {
return this._bypass;
},
set: function (value) {
if(this._lastBypassValue === value) {
return;
}
this._bypass = value;
this.activate(!value);
this._lastBypassValue = value;
}
},
connect: {
value: function (target) {
this.output.connect(target);
}
},
disconnect: {
value: function (target) {
this.output.disconnect(target);
}
},
connectInOrder: {
value: function (nodeArray) {
var i = nodeArray.length - 1;
while(i--) {
if(!nodeArray[i].connect) {
return console.error("AudioNode.connectInOrder: TypeError: Not an AudioNode.", nodeArray[i]);
}
if(nodeArray[i + 1].input) {
nodeArray[i].connect(nodeArray[i + 1].input);
} else {
nodeArray[i].connect(nodeArray[i + 1]);
}
}
}
},
getDefaults: {
value: function () {
var result = {};
for(var key in this.defaults) {
result[key] = this.defaults[key].value;
}
return result;
}
},
automate: {
value: function (property, value, duration, startTime) {
var start = startTime ? ~~ (startTime / 1000) : userContext.currentTime,
dur = duration ? ~~ (duration / 1000) : 0,
_is = this.defaults[property],
param = this[property],
method;
if(param) {
if(_is.automatable) {
if(!duration) {
method = set;
} else {
method = linear;
param.cancelScheduledValues(start);
param.setValueAtTime(param.value, start);
}
param[method](value, dur + start);
} else {
param = value;
}
} else {
console.error("Invalid Property for " + this.name);
}
}
}
}),
FLOAT = "float",
BOOLEAN = "boolean",
STRING = "string",
INT = "int";
function dbToWAVolume(db) {
return Math.max(0, Math.round(100 * Math.pow(2, db / 6)) / 100);
}
function fmod(x, y) {
// http://kevin.vanzonneveld.net
// + original by: Onno Marsman
// + input by: Brett Zamir (http://brett-zamir.me)
// + bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
// * example 1: fmod(5.7, 1.3);
// * returns 1: 0.5
var tmp, tmp2, p = 0,
pY = 0,
l = 0.0,
l2 = 0.0;
tmp = x.toExponential().match(/^.\.?(.*)e(.+)$/);
p = parseInt(tmp[2], 10) - (tmp[1] + '').length;
tmp = y.toExponential().match(/^.\.?(.*)e(.+)$/);
pY = parseInt(tmp[2], 10) - (tmp[1] + '').length;
if(pY > p) {
p = pY;
}
tmp2 = (x % y);
if(p < -100 || p > 20) {
// toFixed will give an out of bound error so we fix it like this:
l = Math.round(Math.log(tmp2) / Math.log(10));
l2 = Math.pow(10, l);
return(tmp2 / l2).toFixed(l - p) * l2;
} else {
return parseFloat(tmp2.toFixed(-p));
}
}
function sign(x) {
if(x === 0) {
return 1;
} else {
return Math.abs(x) / x;
}
}
function tanh(n) {
return(Math.exp(n) - Math.exp(-n)) / (Math.exp(n) + Math.exp(-n));
}
Tuna.prototype.Filter = function (properties) {
if(!properties) {
properties = this.getDefaults();
}
this.input = userContext.createGain();
this.activateNode = userContext.createGain();
this.filter = userContext.createBiquadFilter();
this.output = userContext.createGain();
this.activateNode.connect(this.filter);
this.filter.connect(this.output);
this.frequency = properties.frequency || this.defaults.frequency.value;
this.Q = properties.resonance || this.defaults.Q.value;
this.filterType = properties.filterType || this.defaults.filterType.value;
this.gain = properties.gain || this.defaults.gain.value;
this.bypass = properties.bypass || false;
};
Tuna.prototype.Filter.prototype = Object.create(Super, {
name: {
value: "Filter"
},
defaults: {
writable:true,
value: {
frequency: {
value: 800,
min: 20,
max: 22050,
automatable: true,
type: FLOAT
},
Q: {
value: 1,
min: 0.001,
max: 100,
automatable: true,
type: FLOAT
},
gain: {
value: 0,
min: -40,
max: 40,
automatable: true,
type: FLOAT
},
bypass: {
value: true,
automatable: false,
type: BOOLEAN
},
filterType: {
value: 1,
min: 0,
max: 7,
automatable: false,
type: INT
}
}
},
filterType: {
enumerable: true,
get: function () {
return this.filter.type;
},
set: function (value) {
this.filter.type = value;
}
},
Q: {
enumerable: true,
get: function () {
return this.filter.Q;
},
set: function (value) {
this.filter.Q.value = value;
}
},
gain: {
enumerable: true,
get: function () {
return this.filter.gain;
},
set: function (value) {
this.filter.gain.value = value;
}
},
frequency: {
enumerable: true,
get: function () {
return this.filter.frequency;
},
set: function (value) {
this.filter.frequency.value = value;
}
}
});
Tuna.prototype.Cabinet = function (properties) {
if(!properties) {
properties = this.getDefaults();
}
this.input = userContext.createGain();
this.activateNode = userContext.createGain();
this.convolver = this.newConvolver(properties.impulsePath || "../impulses/impulse_guitar.wav");
this.makeupNode = userContext.createGain();
this.output = userContext.createGain();
this.activateNode.connect(this.convolver.input);
this.convolver.output.connect(this.makeupNode);
this.makeupNode.connect(this.output);
this.makeupGain = properties.makeupGain || this.defaults.makeupGain;
this.bypass = properties.bypass || false;
};
Tuna.prototype.Cabinet.prototype = Object.create(Super, {
name: {
value: "Cabinet"
},
defaults: {
writable:true,
value: {
makeupGain: {
value: 1,
min: 0,
max: 20,
automatable: true,
type: FLOAT
},
bypass: {
value: false,
automatable: false,
type: BOOLEAN
}
}
},
makeupGain: {
enumerable: true,
get: function () {
return this.makeupNode.gain;
},
set: function (value) {
this.makeupNode.gain.value = value;
}
},
newConvolver: {
value: function (impulsePath) {
return new userInstance.Convolver({
impulse: impulsePath,
dryLevel: 0,
wetLevel: 1
});
}
}
});
Tuna.prototype.Chorus = function (properties) {
if(!properties) {
properties = this.getDefaults();
}
this.input = userContext.createGain();
this.attenuator = this.activateNode = userContext.createGain();
this.splitter = userContext.createChannelSplitter(2);
this.delayL = userContext.createDelay();
this.delayR = userContext.createDelay();
this.feedbackGainNodeLR = userContext.createGain();
this.feedbackGainNodeRL = userContext.createGain();
this.merger = userContext.createChannelMerger(2);
this.output = userContext.createGain();
this.lfoL = new userInstance.LFO({
target: this.delayL.delayTime,
callback: pipe
});
this.lfoR = new userInstance.LFO({
target: this.delayR.delayTime,
callback: pipe
});
this.input.connect(this.attenuator);
this.attenuator.connect(this.output);
this.attenuator.connect(this.splitter);
this.splitter.connect(this.delayL, 0);
this.splitter.connect(this.delayR, 1);
this.delayL.connect(this.feedbackGainNodeLR);
this.delayR.connect(this.feedbackGainNodeRL);
this.feedbackGainNodeLR.connect(this.delayR);
this.feedbackGainNodeRL.connect(this.delayL);
this.delayL.connect(this.merger, 0, 0);
this.delayR.connect(this.merger, 0, 1);
this.merger.connect(this.output);
this.feedback = properties.feedback || this.defaults.feedback.value;
this.rate = properties.rate || this.defaults.rate.value;
this.delay = properties.delay || this.defaults.delay.value;
this.depth = properties.depth || this.defaults.depth.value;
this.lfoR.phase = Math.PI / 2;
this.attenuator.gain.value = 0.6934; // 1 / (10 ^ (((20 * log10(3)) / 3) / 20))
this.lfoL.activate(true);
this.lfoR.activate(true);
this.bypass = properties.bypass || false;
};
Tuna.prototype.Chorus.prototype = Object.create(Super, {
name: {
value: "Chorus"
},
defaults: {
writable:true,
value: {
feedback: {
value: 0.4,
min: 0,
max: 0.95,
automatable: false,
type: FLOAT
},
delay: {
value: 0.0045,
min: 0,
max: 1,
automatable: false,
type: FLOAT
},
depth: {
value: 0.7,
min: 0,
max: 1,
automatable: false,
type: FLOAT
},
rate: {
value: 1.5,
min: 0,
max: 8,
automatable: false,
type: FLOAT
},
bypass: {
value: true,
automatable: false,
type: BOOLEAN
}
}
},
delay: {
enumerable: true,
get: function () {
return this._delay;
},
set: function (value) {
this._delay = 0.0002 * (Math.pow(10, value) * 2);
this.lfoL.offset = this._delay;
this.lfoR.offset = this._delay;
this._depth = this._depth;
}
},
depth: {
enumerable: true,
get: function () {
return this._depth;
},
set: function (value) {
this._depth = value;
this.lfoL.oscillation = this._depth * this._delay;
this.lfoR.oscillation = this._depth * this._delay;
}
},
feedback: {
enumerable: true,
get: function () {
return this._feedback;
},
set: function (value) {
this._feedback = value;
this.feedbackGainNodeLR.gain.value = this._feedback;
this.feedbackGainNodeRL.gain.value = this._feedback;
}
},
rate: {
enumerable: true,
get: function () {
return this._rate;
},
set: function (value) {
this._rate = value;
this.lfoL.frequency = this._rate;
this.lfoR.frequency = this._rate;
}
}
});
Tuna.prototype.Compressor = function (properties) {
if(!properties) {
properties = this.getDefaults();
}
this.input = userContext.createGain();
this.compNode = this.activateNode = userContext.createDynamicsCompressor();
this.makeupNode = userContext.createGain();
this.output = userContext.createGain();
this.compNode.connect(this.makeupNode);
this.makeupNode.connect(this.output);
this.automakeup = properties.automakeup || this.defaults.automakeup.value;
this.makeupGain = properties.makeupGain || this.defaults.makeupGain.value;
this.threshold = properties.threshold || this.defaults.threshold.value;
this.release = properties.release || this.defaults.release.value;
this.attack = properties.attack || this.defaults.attack.value;
this.ratio = properties.ratio || this.defaults.ratio.value;
this.knee = properties.knee || this.defaults.knee.value;
this.bypass = properties.bypass || false;
};
Tuna.prototype.Compressor.prototype = Object.create(Super, {
name: {
value: "Compressor"
},
defaults: {
writable:true,
value: {
threshold: {
value: -20,
min: -60,
max: 0,
automatable: true,
type: FLOAT
},
release: {
value: 250,
min: 10,
max: 2000,
automatable: true,
type: FLOAT
},
makeupGain: {
value: 1,
min: 1,
max: 100,
automatable: true,
type: FLOAT
},
attack: {
value: 1,
min: 0,
max: 1000,
automatable: true,
type: FLOAT
},
ratio: {
value: 4,
min: 1,
max: 50,
automatable: true,
type: FLOAT
},
knee: {
value: 5,
min: 0,
max: 40,
automatable: true,
type: FLOAT
},
automakeup: {
value: false,
automatable: false,
type: BOOLEAN
},
bypass: {
value: true,
automatable: false,
type: BOOLEAN
}
}
},
computeMakeup: {
value: function () {
var magicCoefficient = 4,
// raise me if the output is too hot
c = this.compNode;
return -(c.threshold.value - c.threshold.value / c.ratio.value) / magicCoefficient;
}
},
automakeup: {
enumerable: true,
get: function () {
return this._automakeup;
},
set: function (value) {
this._automakeup = value;
if(this._automakeup) this.makeupGain = this.computeMakeup();
}
},
threshold: {
enumerable: true,
get: function () {
return this.compNode.threshold;
},
set: function (value) {
this.compNode.threshold.value = value;
if(this._automakeup) this.makeupGain = this.computeMakeup();
}
},
ratio: {
enumerable: true,
get: function () {
return this.compNode.ratio;
},
set: function (value) {
this.compNode.ratio.value = value;
if(this._automakeup) this.makeupGain = this.computeMakeup();
}
},
knee: {
enumerable: true,
get: function () {
return this.compNode.knee;
},
set: function (value) {
this.compNode.knee.value = value;
if(this._automakeup) this.makeupGain = this.computeMakeup();
}
},
attack: {
enumerable: true,
get: function () {
return this.compNode.attack;
},
set: function (value) {
this.compNode.attack.value = value / 1000;
}
},
release: {
enumerable: true,
get: function () {
return this.compNode.release;
},
set: function (value) {
this.compNode.release = value / 1000;
}
},
makeupGain: {
enumerable: true,
get: function () {
return this.makeupNode.gain;
},
set: function (value) {
this.makeupNode.gain.value = dbToWAVolume(value);
}
}
});
Tuna.prototype.Convolver = function (properties) {
if(!properties) {
properties = this.getDefaults();
}
this.input = userContext.createGain();
this.activateNode = userContext.createGain();
this.convolver = userContext.createConvolver();
this.dry = userContext.createGain();
this.filterLow = userContext.createBiquadFilter();
this.filterHigh = userContext.createBiquadFilter();
this.wet = userContext.createGain();
this.output = userContext.createGain();
this.activateNode.connect(this.filterLow);
this.activateNode.connect(this.dry);
this.filterLow.connect(this.filterHigh);
this.filterHigh.connect(this.convolver);
this.convolver.connect(this.wet);
this.wet.connect(this.output);
this.dry.connect(this.output);
this.dryLevel = properties.dryLevel || this.defaults.dryLevel.value;
this.wetLevel = properties.wetLevel || this.defaults.wetLevel.value;
this.highCut = properties.highCut || this.defaults.highCut.value;
this.buffer = properties.impulse || "../impulses/ir_rev_short.wav";
this.lowCut = properties.lowCut || this.defaults.lowCut.value;
this.level = properties.level || this.defaults.level.value;
this.filterHigh.type = "lowpass";
this.filterLow.type = "highpass";
this.bypass = properties.bypass || false;
};
Tuna.prototype.Convolver.prototype = Object.create(Super, {
name: {
value: "Convolver"
},
defaults: {
writable:true,
value: {
highCut: {
value: 22050,
min: 20,
max: 22050,
automatable: true,
type: FLOAT
},
lowCut: {
value: 20,
min: 20,
max: 22050,
automatable: true,
type: FLOAT
},
dryLevel: {
value: 1,
min: 0,
max: 1,
automatable: true,
type: FLOAT
},
wetLevel: {
value: 1,
min: 0,
max: 1,
automatable: true,
type: FLOAT
},
level: {
value: 1,
min: 0,
max: 1,
automatable: true,
type: FLOAT
}
}
},
lowCut: {
get: function () {
return this.filterLow.frequency;
},
set: function (value) {
this.filterLow.frequency.value = value;
}
},
highCut: {
get: function () {
return this.filterHigh.frequency;
},
set: function (value) {
this.filterHigh.frequency.value = value;
}
},
level: {
get: function () {
return this.output.gain;
},
set: function (value) {
this.output.gain.value = value;
}
},
dryLevel: {
get: function () {
return this.dry.gain
},
set: function (value) {
this.dry.gain.value = value;
}
},
wetLevel: {
get: function () {
return this.wet.gain;
},
set: function (value) {
this.wet.gain.value = value;
}
},
buffer: {
enumerable: false,
get: function () {
return this.convolver.buffer;
},
set: function (impulse) {
var convolver = this.convolver,
xhr = new XMLHttpRequest();
if(!impulse) {
console.log("Tuna.Convolver.setBuffer: Missing impulse path!");
return;
}
xhr.open("GET", impulse, true);
xhr.responseType = "arraybuffer";
xhr.onreadystatechange = function () {
if(xhr.readyState === 4) {
if(xhr.status < 300 && xhr.status > 199 || xhr.status === 302) {
userContext.decodeAudioData(xhr.response, function (buffer) {
convolver.buffer = buffer;
}, function (e) {
if(e) console.log("Tuna.Convolver.setBuffer: Error decoding data" + e);
});
}
}
};
xhr.send(null);
}
}
});
Tuna.prototype.Delay = function (properties) {
if(!properties) {
properties = this.getDefaults();
}
this.input = userContext.createGain();
this.activateNode = userContext.createGain();
this.dry = userContext.createGain();
this.wet = userContext.createGain();
this.filter = userContext.createBiquadFilter();
this.delay = userContext.createDelay();
this.feedbackNode = userContext.createGain();
this.output = userContext.createGain();
this.activateNode.connect(this.delay);
this.activateNode.connect(this.dry);
this.delay.connect(this.filter);
this.filter.connect(this.feedbackNode);
this.feedbackNode.connect(this.delay);
this.feedbackNode.connect(this.wet);
this.wet.connect(this.output);
this.dry.connect(this.output);
this.delayTime = properties.delayTime || this.defaults.delayTime.value;
this.feedback = properties.feedback || this.defaults.feedback.value;
this.wetLevel = properties.wetLevel || this.defaults.wetLevel.value;
this.dryLevel = properties.dryLevel || this.defaults.dryLevel.value;
this.cutoff = properties.cutoff || this.defaults.cutoff.value;
this.filter.type = "lowpass";
this.bypass = properties.bypass || false;
};
Tuna.prototype.Delay.prototype = Object.create(Super, {
name: {
value: "Delay"
},
defaults: {
writable:true,
value: {
delayTime: {
value: 100,
min: 20,
max: 1000,
automatable: false,
type: FLOAT
},
feedback: {
value: 0.45,
min: 0,
max: 0.9,
automatable: true,
type: FLOAT
},
cutoff: {
value: 20000,
min: 20,
max: 20000,
automatable: true,
type: FLOAT
},
wetLevel: {
value: 0.5,
min: 0,
max: 1,
automatable: true,
type: FLOAT
},
dryLevel: {
value: 1,
min: 0,
max: 1,
automatable: true,
type: FLOAT
}
}
},
delayTime: {
enumerable: true,
get: function () {
return this.delay.delayTime;
},
set: function (value) {
this.delay.delayTime.value = value / 1000;
}
},
wetLevel: {
enumerable: true,
get: function () {
return this.wet.gain;
},
set: function (value) {
this.wet.gain.value = value;
}
},
dryLevel: {
enumerable: true,
get: function () {
return this.dry.gain;
},
set: function (value) {
this.dry.gain.value = value;
}
},
feedback: {
enumerable: true,
get: function () {
return this.feedbackNode.gain;
},
set: function (value) {
this.feedbackNode.gain.value = value;
}
},
cutoff: {
enumerable: true,
get: function () {
return this.filter.frequency;
},
set: function (value) {
this.filter.frequency.value = value;
}
}
});
Tuna.prototype.Overdrive = function (properties) {
if(!properties) {
properties = this.getDefaults();
}
this.input = userContext.createGain();
this.activateNode = userContext.createGain();
this.inputDrive = userContext.createGain();
this.waveshaper = userContext.createWaveShaper();
this.outputDrive = userContext.createGain();
this.output = userContext.createGain();
this.activateNode.connect(this.inputDrive);
this.inputDrive.connect(this.waveshaper);
this.waveshaper.connect(this.outputDrive);
this.outputDrive.connect(this.output);
this.ws_table = new Float32Array(this.k_nSamples);
this.drive = properties.drive || this.defaults.drive.value;
this.outputGain = properties.outputGain || this.defaults.outputGain.value;
this.curveAmount = properties.curveAmount || this.defaults.curveAmount.value;
this.algorithmIndex = properties.algorithmIndex || this.defaults.algorithmIndex.value;
this.bypass = properties.bypass || false;
};
Tuna.prototype.Overdrive.prototype = Object.create(Super, {
name: {
value: "Overdrive"
},
defaults: {
writable:true,
value: {
drive: {
value: 1,
min: 0,
max: 1,
automatable: true,
type: FLOAT,
scaled: true
},
outputGain: {
value: 1,
min: 0,
max: 1,
automatable: true,
type: FLOAT,
scaled: true
},
curveAmount: {
value: 0.725,
min: 0,
max: 1,
automatable: false,
type: FLOAT
},
algorithmIndex: {
value: 0,
min: 0,
max: 5,
automatable: false,
type: INT
}
}
},
k_nSamples: {
value: 8192
},
drive: {
get: function () {
return this.inputDrive.gain;
},
set: function (value) {
this._drive = value;
}
},
curveAmount: {
get: function () {
return this._curveAmount;
},
set: function (value) {
this._curveAmount = value;
if(this._algorithmIndex === undefined) {
this._algorithmIndex = 0;
}
this.waveshaperAlgorithms[this._algorithmIndex](this._curveAmount, this.k_nSamples, this.ws_table);
this.waveshaper.curve = this.ws_table;
}
},
outputGain: {
get: function () {
return this.outputDrive.gain;
},
set: function (value) {
this._outputGain = dbToWAVolume(value);
}
},
algorithmIndex: {
get: function () {
return this._algorithmIndex;
},
set: function (value) {
this._algorithmIndex = value;
this.curveAmount = this._curveAmount;
}
},
waveshaperAlgorithms: {
value: [
function (amount, n_samples, ws_table) {
amount = Math.min(amount, 0.9999);
var k = 2 * amount / (1 - amount),
i, x;