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p5.sound.js
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/*! p5.sound.js v0.2.14 2015-09-13 */
(function (root, factory) {
if (typeof define === 'function' && define.amd)
define('p5.sound', ['p5'], function (p5) { (factory(p5));});
else if (typeof exports === 'object')
factory(require('../p5'));
else
factory(root['p5']);
}(this, function (p5) {
/**
* p5.sound extends p5 with <a href="http://caniuse.com/audio-api"
* target="_blank">Web Audio</a> functionality including audio input,
* playback, analysis and synthesis.
* <br/><br/>
* <a href="#/p5.SoundFile"><b>p5.SoundFile</b></a>: Load and play sound files.<br/>
* <a href="#/p5.Amplitude"><b>p5.Amplitude</b></a>: Get the current volume of a sound.<br/>
* <a href="#/p5.AudioIn"><b>p5.AudioIn</b></a>: Get sound from an input source, typically
* a computer microphone.<br/>
* <a href="#/p5.FFT"><b>p5.FFT</b></a>: Analyze the frequency of sound. Returns
* results from the frequency spectrum or time domain (waveform).<br/>
* <a href="#/p5.Oscillator"><b>p5.Oscillator</b></a>: Generate Sine,
* Triangle, Square and Sawtooth waveforms. Base class of
* <a href="#/p5.Noise">p5.Noise</a> and <a href="#/p5.Pulse">p5.Pulse</a>.
* <br/>
* <a href="#/p5.Env"><b>p5.Env</b></a>: An Envelope is a series
* of fades over time. Often used to control an object's
* output gain level as an "ADSR Envelope" (Attack, Decay,
* Sustain, Release). Can also modulate other parameters.<br/>
* <a href="#/p5.Delay"><b>p5.Delay</b></a>: A delay effect with
* parameters for feedback, delayTime, and lowpass filter.<br/>
* <a href="#/p5.Filter"><b>p5.Filter</b></a>: Filter the frequency range of a
* sound.
* <br/>
* <a href="#/p5.Reverb"><b>p5.Reverb</b></a>: Add reverb to a sound by specifying
* duration and decay. <br/>
* <b><a href="#/p5.Convolver">p5.Convolver</a>:</b> Extends
* <a href="#/p5.Reverb">p5.Reverb</a> to simulate the sound of real
* physical spaces through convolution.<br/>
* <b><a href="#/p5.SoundRecorder">p5.SoundRecorder</a></b>: Record sound for playback
* / save the .wav file.
* <b><a href="#/p5.Phrase">p5.Phrase</a></b>, <b><a href="#/p5.Part">p5.Part</a></b> and
* <b><a href="#/p5.Score">p5.Score</a></b>: Compose musical sequences.
* <br/><br/>
* p5.sound is on <a href="https://github.com/therewasaguy/p5.sound/">GitHub</a>.
* Download the latest version
* <a href="https://github.com/therewasaguy/p5.sound/blob/master/lib/p5.sound.js">here</a>.
*
* @module p5.sound
* @submodule p5.sound
* @for p5.sound
* @main
*/
/**
* p5.sound developed by Jason Sigal for the Processing Foundation, Google Summer of Code 2014. The MIT License (MIT).
*
* http://github.com/therewasaguy/p5.sound
*
* Some of the many audio libraries & resources that inspire p5.sound:
* - TONE.js (c) Yotam Mann, 2014. Licensed under The MIT License (MIT). https://github.com/TONEnoTONE/Tone.js
* - buzz.js (c) Jay Salvat, 2013. Licensed under The MIT License (MIT). http://buzz.jaysalvat.com/
* - Boris Smus Web Audio API book, 2013. Licensed under the Apache License http://www.apache.org/licenses/LICENSE-2.0
* - wavesurfer.js https://github.com/katspaugh/wavesurfer.js
* - Web Audio Components by Jordan Santell https://github.com/web-audio-components
* - Wilm Thoben's Sound library for Processing https://github.com/processing/processing/tree/master/java/libraries/sound
*
* Web Audio API: http://w3.org/TR/webaudio/
*/
var sndcore;
sndcore = function () {
'use strict';
/**
* Web Audio SHIMS and helper functions to ensure compatability across browsers
*/
// If window.AudioContext is unimplemented, it will alias to window.webkitAudioContext.
window.AudioContext = window.AudioContext || window.webkitAudioContext;
// Create the Audio Context
var audiocontext = new window.AudioContext();
/**
* <p>Returns the Audio Context for this sketch. Useful for users
* who would like to dig deeper into the <a target='_blank' href=
* 'http://webaudio.github.io/web-audio-api/'>Web Audio API
* </a>.</p>
*
* @method getAudioContext
* @return {Object} AudioContext for this sketch
*/
p5.prototype.getAudioContext = function () {
return audiocontext;
};
// Polyfills & SHIMS (inspired by tone.js and the AudioContext MonkeyPatch https://github.com/cwilso/AudioContext-MonkeyPatch/ (c) 2013 Chris Wilson, Licensed under the Apache License) //
if (typeof audiocontext.createGain !== 'function') {
window.audioContext.createGain = window.audioContext.createGainNode;
}
if (typeof audiocontext.createDelay !== 'function') {
window.audioContext.createDelay = window.audioContext.createDelayNode;
}
if (typeof window.AudioBufferSourceNode.prototype.start !== 'function') {
window.AudioBufferSourceNode.prototype.start = window.AudioBufferSourceNode.prototype.noteGrainOn;
}
if (typeof window.AudioBufferSourceNode.prototype.stop !== 'function') {
window.AudioBufferSourceNode.prototype.stop = window.AudioBufferSourceNode.prototype.noteOff;
}
if (typeof window.OscillatorNode.prototype.start !== 'function') {
window.OscillatorNode.prototype.start = window.OscillatorNode.prototype.noteOn;
}
if (typeof window.OscillatorNode.prototype.stop !== 'function') {
window.OscillatorNode.prototype.stop = window.OscillatorNode.prototype.noteOff;
}
if (!window.AudioContext.prototype.hasOwnProperty('createScriptProcessor')) {
window.AudioContext.prototype.createScriptProcessor = window.AudioContext.prototype.createJavaScriptNode;
}
// Polyfill for AudioIn, also handled by p5.dom createCapture
navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia;
/**
* Determine which filetypes are supported (inspired by buzz.js)
* The audio element (el) will only be used to test browser support for various audio formats
*/
var el = document.createElement('audio');
p5.prototype.isSupported = function () {
return !!el.canPlayType;
};
var isOGGSupported = function () {
return !!el.canPlayType && el.canPlayType('audio/ogg; codecs="vorbis"');
};
var isMP3Supported = function () {
return !!el.canPlayType && el.canPlayType('audio/mpeg;');
};
var isWAVSupported = function () {
return !!el.canPlayType && el.canPlayType('audio/wav; codecs="1"');
};
var isAACSupported = function () {
return !!el.canPlayType && (el.canPlayType('audio/x-m4a;') || el.canPlayType('audio/aac;'));
};
var isAIFSupported = function () {
return !!el.canPlayType && el.canPlayType('audio/x-aiff;');
};
p5.prototype.isFileSupported = function (extension) {
switch (extension.toLowerCase()) {
case 'mp3':
return isMP3Supported();
case 'wav':
return isWAVSupported();
case 'ogg':
return isOGGSupported();
case 'aac', 'm4a', 'mp4':
return isAACSupported();
case 'aif', 'aiff':
return isAIFSupported();
default:
return false;
}
};
// if it is iOS, we have to have a user interaction to start Web Audio
// http://paulbakaus.com/tutorials/html5/web-audio-on-ios/
var iOS = navigator.userAgent.match(/(iPad|iPhone|iPod)/g) ? true : false;
if (iOS) {
window.addEventListener('touchstart', function () {
// create empty buffer
var buffer = audiocontext.createBuffer(1, 1, 22050);
var source = audiocontext.createBufferSource();
source.buffer = buffer;
// connect to output (your speakers)
source.connect(audiocontext.destination);
// play the file
source.start(0);
}, false);
}
}();
var master;
master = function () {
'use strict';
/**
* Master contains AudioContext and the master sound output.
*/
var Master = function () {
var audiocontext = p5.prototype.getAudioContext();
this.input = audiocontext.createGain();
this.output = audiocontext.createGain();
//put a hard limiter on the output
this.limiter = audiocontext.createDynamicsCompressor();
this.limiter.threshold.value = 0;
this.limiter.ratio.value = 100;
this.audiocontext = audiocontext;
this.output.disconnect();
// an array of input sources
this.inputSources = [];
// connect input to limiter
this.input.connect(this.limiter);
// connect limiter to output
this.limiter.connect(this.output);
// meter is just for global Amplitude / FFT analysis
this.meter = audiocontext.createGain();
this.fftMeter = audiocontext.createGain();
this.output.connect(this.meter);
this.output.connect(this.fftMeter);
// connect output to destination
this.output.connect(this.audiocontext.destination);
// an array of all sounds in the sketch
this.soundArray = [];
// an array of all musical parts in the sketch
this.parts = [];
// file extensions to search for
this.extensions = [];
};
// create a single instance of the p5Sound / master output for use within this sketch
var p5sound = new Master();
/**
* Returns a number representing the master amplitude (volume) for sound
* in this sketch.
*
* @method getMasterVolume
* @return {Number} Master amplitude (volume) for sound in this sketch.
* Should be between 0.0 (silence) and 1.0.
*/
p5.prototype.getMasterVolume = function () {
return p5sound.output.gain.value;
};
/**
* <p>Scale the output of all sound in this sketch</p>
* Scaled between 0.0 (silence) and 1.0 (full volume).
* 1.0 is the maximum amplitude of a digital sound, so multiplying
* by greater than 1.0 may cause digital distortion. To
* fade, provide a <code>rampTime</code> parameter. For more
* complex fades, see the Env class.
*
* Alternately, you can pass in a signal source such as an
* oscillator to modulate the amplitude with an audio signal.
*
* <p><b>How This Works</b>: When you load the p5.sound module, it
* creates a single instance of p5sound. All sound objects in this
* module output to p5sound before reaching your computer's output.
* So if you change the amplitude of p5sound, it impacts all of the
* sound in this module.</p>
*
* <p>If no value is provided, returns a Web Audio API Gain Node</p>
*
* @method masterVolume
* @param {Number|Object} volume Volume (amplitude) between 0.0
* and 1.0 or modulating signal/oscillator
* @param {Number} [rampTime] Fade for t seconds
* @param {Number} [timeFromNow] Schedule this event to happen at
* t seconds in the future
*/
p5.prototype.masterVolume = function (vol, rampTime, tFromNow) {
if (typeof vol === 'number') {
var rampTime = rampTime || 0;
var tFromNow = tFromNow || 0;
var now = p5sound.audiocontext.currentTime;
var currentVol = p5sound.output.gain.value;
p5sound.output.gain.cancelScheduledValues(now + tFromNow);
p5sound.output.gain.linearRampToValueAtTime(currentVol, now + tFromNow);
p5sound.output.gain.linearRampToValueAtTime(vol, now + tFromNow + rampTime);
} else if (vol) {
vol.connect(p5sound.output.gain);
} else {
// return the Gain Node
return p5sound.output.gain;
}
};
/**
* p5.soundOut is the p5.sound master output. It sends output to
* the destination of this window's web audio context. It contains
* Web Audio API nodes including a dyanmicsCompressor (<code>.limiter</code>),
* and Gain Nodes for <code>.input</code> and <code>.output</code>.
*
* @property p5.soundOut
* @type {Object}
*/
p5.soundOut = p5sound;
/**
* a silent connection to the DesinationNode
* which will ensure that anything connected to it
* will not be garbage collected
*
* @private
*/
p5.soundOut._silentNode = p5sound.audiocontext.createGain();
p5.soundOut._silentNode.gain.value = 0;
p5.soundOut._silentNode.connect(p5sound.audiocontext.destination);
return p5sound;
}(sndcore);
var helpers;
helpers = function () {
'use strict';
var p5sound = master;
/**
* Returns a number representing the sample rate, in samples per second,
* of all sound objects in this audio context. It is determined by the
* sampling rate of your operating system's sound card, and it is not
* currently possile to change.
* It is often 44100, or twice the range of human hearing.
*
* @method sampleRate
* @return {Number} samplerate samples per second
*/
p5.prototype.sampleRate = function () {
return p5sound.audiocontext.sampleRate;
};
/**
* Returns the closest MIDI note value for
* a given frequency.
*
* @param {Number} frequency A freqeuncy, for example, the "A"
* above Middle C is 440Hz
* @return {Number} MIDI note value
*/
p5.prototype.freqToMidi = function (f) {
var mathlog2 = Math.log(f / 440) / Math.log(2);
var m = Math.round(12 * mathlog2) + 57;
return m;
};
/**
* Returns the frequency value of a MIDI note value.
* General MIDI treats notes as integers where middle C
* is 60, C# is 61, D is 62 etc. Useful for generating
* musical frequencies with oscillators.
*
* @method midiToFreq
* @param {Number} midiNote The number of a MIDI note
* @return {Number} Frequency value of the given MIDI note
* @example
* <div><code>
* var notes = [60, 64, 67, 72];
* var i = 0;
*
* function setup() {
* osc = new p5.Oscillator('Triangle');
* osc.start();
* frameRate(1);
* }
*
* function draw() {
* var freq = midiToFreq(notes[i]);
* osc.freq(freq);
* i++;
* if (i >= notes.length){
* i = 0;
* }
* }
* </code></div>
*/
p5.prototype.midiToFreq = function (m) {
return 440 * Math.pow(2, (m - 69) / 12);
};
/**
* List the SoundFile formats that you will include. LoadSound
* will search your directory for these extensions, and will pick
* a format that is compatable with the client's web browser.
* <a href="http://media.io/">Here</a> is a free online file
* converter.
*
* @method soundFormats
* @param {String|Strings} formats i.e. 'mp3', 'wav', 'ogg'
* @example
* <div><code>
* function preload() {
* // set the global sound formats
* soundFormats('mp3', 'ogg');
*
* // load either beatbox.mp3, or .ogg, depending on browser
* mySound = loadSound('../sounds/beatbox.mp3');
* }
*
* function setup() {
* mySound.play();
* }
* </code></div>
*/
p5.prototype.soundFormats = function () {
// reset extensions array
p5sound.extensions = [];
// add extensions
for (var i = 0; i < arguments.length; i++) {
arguments[i] = arguments[i].toLowerCase();
if ([
'mp3',
'wav',
'ogg',
'm4a',
'aac'
].indexOf(arguments[i]) > -1) {
p5sound.extensions.push(arguments[i]);
} else {
throw arguments[i] + ' is not a valid sound format!';
}
}
};
p5.prototype.disposeSound = function () {
for (var i = 0; i < p5sound.soundArray.length; i++) {
p5sound.soundArray[i].dispose();
}
};
// register removeSound to dispose of p5sound SoundFiles, Convolvers,
// Oscillators etc when sketch ends
p5.prototype.registerMethod('remove', p5.prototype.disposeSound);
p5.prototype._checkFileFormats = function (paths) {
var path;
// if path is a single string, check to see if extension is provided
if (typeof paths === 'string') {
path = paths;
// see if extension is provided
var extTest = path.split('.').pop();
// if an extension is provided...
if ([
'mp3',
'wav',
'ogg',
'm4a',
'aac'
].indexOf(extTest) > -1) {
var supported = p5.prototype.isFileSupported(extTest);
if (supported) {
path = path;
} else {
var pathSplit = path.split('.');
var pathCore = pathSplit[pathSplit.length - 1];
for (var i = 0; i < p5sound.extensions.length; i++) {
var extension = p5sound.extensions[i];
var supported = p5.prototype.isFileSupported(extension);
if (supported) {
pathCore = '';
if (pathSplit.length === 2) {
pathCore += pathSplit[0];
}
for (var i = 1; i <= pathSplit.length - 2; i++) {
var p = pathSplit[i];
pathCore += '.' + p;
}
path = pathCore += '.';
path = path += extension;
break;
}
}
}
} else {
for (var i = 0; i < p5sound.extensions.length; i++) {
var extension = p5sound.extensions[i];
var supported = p5.prototype.isFileSupported(extension);
if (supported) {
path = path + '.' + extension;
break;
}
}
}
} else if (typeof paths === 'object') {
for (var i = 0; i < paths.length; i++) {
var extension = paths[i].split('.').pop();
var supported = p5.prototype.isFileSupported(extension);
if (supported) {
// console.log('.'+extension + ' is ' + supported +
// ' supported by your browser.');
path = paths[i];
break;
}
}
}
return path;
};
/**
* Used by Osc and Env to chain signal math
*/
p5.prototype._mathChain = function (o, math, thisChain, nextChain, type) {
// if this type of math already exists in the chain, replace it
for (var i in o.mathOps) {
if (o.mathOps[i] instanceof type) {
o.mathOps[i].dispose();
thisChain = i;
if (thisChain < o.mathOps.length - 1) {
nextChain = o.mathOps[i + 1];
}
}
}
o.mathOps[thisChain - 1].disconnect();
o.mathOps[thisChain - 1].connect(math);
math.connect(nextChain);
o.mathOps[thisChain] = math;
return o;
};
}(master);
var panner;
panner = function () {
'use strict';
var p5sound = master;
var ac = p5sound.audiocontext;
// Stereo panner
// if there is a stereo panner node use it
if (typeof ac.createStereoPanner !== 'undefined') {
p5.Panner = function (input, output, numInputChannels) {
this.stereoPanner = this.input = ac.createStereoPanner();
input.connect(this.stereoPanner);
this.stereoPanner.connect(output);
};
p5.Panner.prototype.pan = function (val, tFromNow) {
var time = tFromNow || 0;
var t = ac.currentTime + time;
this.stereoPanner.pan.linearRampToValueAtTime(val, t);
};
p5.Panner.prototype.inputChannels = function (numChannels) {
};
p5.Panner.prototype.connect = function (obj) {
this.stereoPanner.connect(obj);
};
p5.Panner.prototype.disconnect = function (obj) {
this.stereoPanner.disconnect();
};
} else {
// if there is no createStereoPanner object
// such as in safari 7.1.7 at the time of writing this
// use this method to create the effect
p5.Panner = function (input, output, numInputChannels) {
this.input = ac.createGain();
input.connect(this.input);
this.left = ac.createGain();
this.right = ac.createGain();
this.left.channelInterpretation = 'discrete';
this.right.channelInterpretation = 'discrete';
// if input is stereo
if (numInputChannels > 1) {
this.splitter = ac.createChannelSplitter(2);
this.input.connect(this.splitter);
this.splitter.connect(this.left, 1);
this.splitter.connect(this.right, 0);
} else {
this.input.connect(this.left);
this.input.connect(this.right);
}
this.output = ac.createChannelMerger(2);
this.left.connect(this.output, 0, 1);
this.right.connect(this.output, 0, 0);
this.output.connect(output);
};
// -1 is left, +1 is right
p5.Panner.prototype.pan = function (val, tFromNow) {
var time = tFromNow || 0;
var t = ac.currentTime + time;
var v = (val + 1) / 2;
var rightVal = Math.cos(v * Math.PI / 2);
var leftVal = Math.sin(v * Math.PI / 2);
this.left.gain.linearRampToValueAtTime(leftVal, t);
this.right.gain.linearRampToValueAtTime(rightVal, t);
};
p5.Panner.prototype.inputChannels = function (numChannels) {
if (numChannels === 1) {
this.input.disconnect();
this.input.connect(this.left);
this.input.connect(this.right);
} else if (numChannels === 2) {
if (typeof (this.splitter === 'undefined')) {
this.splitter = ac.createChannelSplitter(2);
}
this.input.disconnect();
this.input.connect(this.splitter);
this.splitter.connect(this.left, 1);
this.splitter.connect(this.right, 0);
}
};
p5.Panner.prototype.connect = function (obj) {
this.output.connect(obj);
};
p5.Panner.prototype.disconnect = function (obj) {
this.output.disconnect();
};
}
// 3D panner
p5.Panner3D = function (input, output) {
var panner3D = ac.createPanner();
panner3D.panningModel = 'HRTF';
panner3D.distanceModel = 'linear';
panner3D.setPosition(0, 0, 0);
input.connect(panner3D);
panner3D.connect(output);
panner3D.pan = function (xVal, yVal, zVal) {
panner3D.setPosition(xVal, yVal, zVal);
};
return panner3D;
};
}(master);
var soundfile;
soundfile = function () {
'use strict';
var p5sound = master;
var ac = p5sound.audiocontext;
/**
* <p>SoundFile object with a path to a file.</p>
*
* <p>The p5.SoundFile may not be available immediately because
* it loads the file information asynchronously.</p>
*
* <p>To do something with the sound as soon as it loads
* pass the name of a function as the second parameter.</p>
*
* <p>Only one file path is required. However, audio file formats
* (i.e. mp3, ogg, wav and m4a/aac) are not supported by all
* web browsers. If you want to ensure compatability, instead of a single
* file path, you may include an Array of filepaths, and the browser will
* choose a format that works.</p>
*
* @class p5.SoundFile
* @constructor
* @param {String/Array} path path to a sound file (String). Optionally,
* you may include multiple file formats in
* an array. Alternately, accepts an object
* from the HTML5 File API, or a p5.File.
* @param {Function} [callback] Name of a function to call once file loads
* @return {Object} p5.SoundFile Object
* @example
* <div><code>
*
* function preload() {
* mySound = loadSound('assets/doorbell.mp3');
* }
*
* function setup() {
* mySound.setVolume(0.1);
* mySound.play();
* }
*
* </code></div>
*/
p5.SoundFile = function (paths, onload, whileLoading) {
if (typeof paths !== 'undefined') {
if (typeof paths == 'string' || typeof paths[0] == 'string') {
var path = p5.prototype._checkFileFormats(paths);
this.url = path;
} else if (typeof paths == 'object') {
if (!(window.File && window.FileReader && window.FileList && window.Blob)) {
// The File API isn't supported in this browser
throw 'Unable to load file because the File API is not supported';
}
}
// if type is a p5.File...get the actual file
if (paths.file) {
paths = paths.file;
}
this.file = paths;
}
this._looping = false;
this._playing = false;
this._paused = false;
this._pauseTime = 0;
// cues for scheduling events with addCue() removeCue()
this._cues = [];
// position of the most recently played sample
this._lastPos = 0;
this._counterNode;
this._scopeNode;
// array of sources so that they can all be stopped!
this.bufferSourceNodes = [];
// current source
this.bufferSourceNode = null;
this.buffer = null;
this.playbackRate = 1;
this.gain = 1;
this.input = p5sound.audiocontext.createGain();
this.output = p5sound.audiocontext.createGain();
this.reversed = false;
// start and end of playback / loop
this.startTime = 0;
this.endTime = null;
this.pauseTime = 0;
// "restart" would stop playback before retriggering
this.mode = 'sustain';
// time that playback was started, in millis
this.startMillis = null;
this.amplitude = new p5.Amplitude();
this.output.connect(this.amplitude.input);
// stereo panning
this.panPosition = 0;
this.panner = new p5.Panner(this.output, p5sound.input, 2);
// it is possible to instantiate a soundfile with no path
if (this.url || this.file) {
this.load(onload);
}
// add this p5.SoundFile to the soundArray
p5sound.soundArray.push(this);
if (typeof whileLoading === 'function') {
this.whileLoading = whileLoading;
} else {
this.whileLoading = function () {
};
}
};
// register preload handling of loadSound
p5.prototype.registerPreloadMethod('loadSound', p5);
/**
* loadSound() returns a new p5.SoundFile from a specified
* path. If called during preload(), the p5.SoundFile will be ready
* to play in time for setup() and draw(). If called outside of
* preload, the p5.SoundFile will not be ready immediately, so
* loadSound accepts a callback as the second parameter. Using a
* <a href="https://github.com/processing/p5.js/wiki/Local-server">
* local server</a> is recommended when loading external files.
*
* @method loadSound
* @param {String/Array} path Path to the sound file, or an array with
* paths to soundfiles in multiple formats
* i.e. ['sound.ogg', 'sound.mp3'].
* Alternately, accepts an object: either
* from the HTML5 File API, or a p5.File.
* @param {Function} [callback] Name of a function to call once file loads
* @param {Function} [callback] Name of a function to call while file is loading.
* This function will receive a percentage from 0.0
* to 1.0.
* @return {SoundFile} Returns a p5.SoundFile
* @example
* <div><code>
* function preload() {
* mySound = loadSound('assets/doorbell.mp3');
* }
*
* function setup() {
* mySound.setVolume(0.1);
* mySound.play();
* }
* </code></div>
*/
p5.prototype.loadSound = function (path, callback, whileLoading) {
// if loading locally without a server
if (window.location.origin.indexOf('file://') > -1 && window.cordova === 'undefined') {
alert('This sketch may require a server to load external files. Please see http://bit.ly/1qcInwS');
}
var s = new p5.SoundFile(path, callback, whileLoading);
return s;
};
/**
* This is a helper function that the p5.SoundFile calls to load
* itself. Accepts a callback (the name of another function)
* as an optional parameter.
*
* @private
* @param {Function} [callback] Name of a function to call once file loads
*/
p5.SoundFile.prototype.load = function (callback) {
if (this.url != undefined && this.url != '') {
var sf = this;
var request = new XMLHttpRequest();
request.addEventListener('progress', function (evt) {
sf._updateProgress(evt);
}, false);
request.open('GET', this.url, true);
request.responseType = 'arraybuffer';
// decode asyncrohonously
var self = this;
request.onload = function () {
ac.decodeAudioData(request.response, function (buff) {
self.buffer = buff;
self.panner.inputChannels(buff.numberOfChannels);
if (callback) {
callback(self);
}
});
};
request.send();
} else if (this.file != undefined) {
var reader = new FileReader();
var self = this;
reader.onload = function () {
ac.decodeAudioData(reader.result, function (buff) {
self.buffer = buff;
self.panner.inputChannels(buff.numberOfChannels);
if (callback) {
callback(self);
}
});
};
reader.readAsArrayBuffer(this.file);
}
};
// TO DO: use this method to create a loading bar that shows progress during file upload/decode.
p5.SoundFile.prototype._updateProgress = function (evt) {
if (evt.lengthComputable) {
var percentComplete = Math.log(evt.loaded / evt.total * 9.9);
this.whileLoading(percentComplete);
} else {
console.log('size unknown');
}
};
/**
* Returns true if the sound file finished loading successfully.
*
* @method isLoaded
* @return {Boolean}
*/
p5.SoundFile.prototype.isLoaded = function () {
if (this.buffer) {
return true;
} else {
return false;
}
};
/**
* Play the p5.SoundFile
*
* @method play
* @param {Number} [startTime] (optional) schedule playback to start (in seconds from now).
* @param {Number} [rate] (optional) playback rate
* @param {Number} [amp] (optional) amplitude (volume)
* of playback
* @param {Number} [cueStart] (optional) cue start time in seconds
* @param {Number} [duration] (optional) duration of playback in seconds
*/
p5.SoundFile.prototype.play = function (time, rate, amp, _cueStart, duration) {
var self = this;
var now = p5sound.audiocontext.currentTime;
var cueStart, cueEnd;
var time = time || 0;
if (time < 0) {
time = 0;
}
time = time + now;
// TO DO: if already playing, create array of buffers for easy stop()
if (this.buffer) {
// reset the pause time (if it was paused)
this._pauseTime = 0;
// handle restart playmode
if (this.mode === 'restart' && this.buffer && this.bufferSourceNode) {
var now = p5sound.audiocontext.currentTime;
this.bufferSourceNode.stop(time);
this._counterNode.stop(time);
}
// make a new source and counter. They are automatically assigned playbackRate and buffer
this.bufferSourceNode = this._initSourceNode();
this._counterNode = this._initCounterNode();
if (_cueStart) {
if (_cueStart >= 0 && _cueStart < this.buffer.duration) {
// this.startTime = cueStart;
cueStart = _cueStart;
} else {
throw 'start time out of range';
}
} else {
cueStart = 0;
}
if (duration) {
// if duration is greater than buffer.duration, just play entire file anyway rather than throw an error
duration = duration <= this.buffer.duration - cueStart ? duration : this.buffer.duration;
} else {
duration = this.buffer.duration - cueStart;
}
// TO DO: Fix this. It broke in Safari
//
// method of controlling gain for individual bufferSourceNodes, without resetting overall soundfile volume
// if (typeof(this.bufferSourceNode.gain === 'undefined' ) ) {
// this.bufferSourceNode.gain = p5sound.audiocontext.createGain();
// }
// this.bufferSourceNode.connect(this.bufferSourceNode.gain);
// set local amp if provided, otherwise 1
var a = amp || 1;
// this.bufferSourceNode.gain.gain.setValueAtTime(a, p5sound.audiocontext.currentTime);
// this.bufferSourceNode.gain.connect(this.output);
this.bufferSourceNode.connect(this.output);
this.output.gain.value = a;
// not necessary with _initBufferSource ?
// this.bufferSourceNode.playbackRate.cancelScheduledValues(now);
rate = rate || Math.abs(this.playbackRate);
this.bufferSourceNode.playbackRate.setValueAtTime(rate, now);
// if it was paused, play at the pause position
if (this._paused) {
this.bufferSourceNode.start(time, this.pauseTime, duration);
this._counterNode.start(time, this.pauseTime, duration);
} else {
this.bufferSourceNode.start(time, cueStart, duration);
this._counterNode.start(time, cueStart, duration);
}
this._playing = true;
this._paused = false;
// add source to sources array, which is used in stopAll()
this.bufferSourceNodes.push(this.bufferSourceNode);
this.bufferSourceNode._arrayIndex = this.bufferSourceNodes.length - 1;
// delete this.bufferSourceNode from the sources array when it is done playing:
this.bufferSourceNode.onended = function (e) {
var theNode = this;
// if (self.bufferSourceNodes.length === 1) {
this._playing = false;
// }
setTimeout(function () {
self.bufferSourceNodes.splice(theNode._arrayIndex, 1);
if (self.bufferSourceNodes.length === 0) {
self._playing = false;
}
}, 1);
};
} else {
throw 'not ready to play file, buffer has yet to load. Try preload()';
}
// if looping, will restart at original time
this.bufferSourceNode.loop = this._looping;
this._counterNode.loop = this._looping;
if (this._looping === true) {
var cueEnd = cueStart + duration;
this.bufferSourceNode.loopStart = cueStart;
this.bufferSourceNode.loopEnd = cueEnd;
this._counterNode.loopStart = cueStart;
this._counterNode.loopEnd = cueEnd;
}
};
/**
* p5.SoundFile has two play modes: <code>restart</code> and
* <code>sustain</code>. Play Mode determines what happens to a
* p5.SoundFile if it is triggered while in the middle of playback.
* In sustain mode, playback will continue simultaneous to the
* new playback. In restart mode, play() will stop playback
* and start over. Sustain is the default mode.
*
* @method playMode
* @param {String} str 'restart' or 'sustain'
* @example
* <div><code>
* function setup(){
* mySound = loadSound('assets/Damscray_DancingTiger.mp3');
* }
* function mouseClicked() {
* mySound.playMode('sustain');
* mySound.play();
* }
* function keyPressed() {
* mySound.playMode('restart');
* mySound.play();
* }
*
* </code></div>
*/
p5.SoundFile.prototype.playMode = function (str) {
var s = str.toLowerCase();
// if restart, stop all other sounds from playing
if (s === 'restart' && this.buffer && this.bufferSourceNode) {
for (var i = 0; i < this.bufferSourceNodes.length - 1; i++) {
var now = p5sound.audiocontext.currentTime;
this.bufferSourceNodes[i].stop(now);
}
}
// set play mode to effect future playback
if (s === 'restart' || s === 'sustain') {
this.mode = s;
} else {
throw 'Invalid play mode. Must be either "restart" or "sustain"';
}
};
/**
* Pauses a file that is currently playing. If the file is not
* playing, then nothing will happen.
*
* After pausing, .play() will resume from the paused
* position.
* If p5.SoundFile had been set to loop before it was paused,
* it will continue to loop after it is unpaused with .play().
*
* @method pause
* @param {Number} [startTime] (optional) schedule event to occur
* seconds from now
* @example
* <div><code>
* var soundFile;
*
* function preload() {
* soundFormats('ogg', 'mp3');
* soundFile = loadSound('assets/Damscray_-_Dancing_Tiger_02.mp3');
* }
* function setup() {
* background(0, 255, 0);
* soundFile.setVolume(0.1);
* soundFile.loop();
* }
* function keyTyped() {
* if (key == 'p') {
* soundFile.pause();
* background(255, 0, 0);
* }
* }
*
* function keyReleased() {
* if (key == 'p') {
* soundFile.play();
* background(0, 255, 0);
* }
* </code>
* </div>
*/
p5.SoundFile.prototype.pause = function (time) {
var now = p5sound.audiocontext.currentTime;
var time = time || 0;
var pTime = time + now;
if (this.isPlaying() && this.buffer && this.bufferSourceNode) {
this.pauseTime = this.currentTime();
this.bufferSourceNode.stop(pTime);
this._counterNode.stop(pTime);
this._paused = true;
this._playing = false;
this._pauseTime = this.currentTime();
} else {
this._pauseTime = 0;
}
};
/**
* Loop the p5.SoundFile. Accepts optional parameters to set the
* playback rate, playback volume, loopStart, loopEnd.
*
* @method loop
* @param {Number} [startTime] (optional) schedule event to occur
* seconds from now