web-audio-scheduler/build/web-audio-scheduler.min.js

Event Scheduler for Web Audio API

(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.WebAudioScheduler=f()}})(function(){var define,module,exports;return function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s}({1:[function(require,module,exports){function EventEmitter(){this._events=this._events||{};this._maxListeners=this._maxListeners||undefined}module.exports=EventEmitter;EventEmitter.EventEmitter=EventEmitter;EventEmitter.prototype._events=undefined;EventEmitter.prototype._maxListeners=undefined;EventEmitter.defaultMaxListeners=10;EventEmitter.prototype.setMaxListeners=function(n){if(!isNumber(n)||n<0||isNaN(n))throw TypeError("n must be a positive number");this._maxListeners=n;return this};EventEmitter.prototype.emit=function(type){var er,handler,len,args,i,listeners;if(!this._events)this._events={};if(type==="error"){if(!this._events.error||isObject(this._events.error)&&!this._events.error.length){er=arguments[1];if(er instanceof Error){throw er}else{var err=new Error('Uncaught, unspecified "error" event. ('+er+")");err.context=er;throw err}}}handler=this._events[type];if(isUndefined(handler))return false;if(isFunction(handler)){switch(arguments.length){case 1:handler.call(this);break;case 2:handler.call(this,arguments[1]);break;case 3:handler.call(this,arguments[1],arguments[2]);break;default:args=Array.prototype.slice.call(arguments,1);handler.apply(this,args)}}else if(isObject(handler)){args=Array.prototype.slice.call(arguments,1);listeners=handler.slice();len=listeners.length;for(i=0;i<len;i++)listeners[i].apply(this,args)}return true};EventEmitter.prototype.addListener=function(type,listener){var m;if(!isFunction(listener))throw TypeError("listener must be a function");if(!this._events)this._events={};if(this._events.newListener)this.emit("newListener",type,isFunction(listener.listener)?listener.listener:listener);if(!this._events[type])this._events[type]=listener;else if(isObject(this._events[type]))this._events[type].push(listener);else this._events[type]=[this._events[type],listener];if(isObject(this._events[type])&&!this._events[type].warned){if(!isUndefined(this._maxListeners)){m=this._maxListeners}else{m=EventEmitter.defaultMaxListeners}if(m&&m>0&&this._events[type].length>m){this._events[type].warned=true;console.error("(node) warning: possible EventEmitter memory "+"leak detected. %d listeners added. "+"Use emitter.setMaxListeners() to increase limit.",this._events[type].length);if(typeof console.trace==="function"){console.trace()}}}return this};EventEmitter.prototype.on=EventEmitter.prototype.addListener;EventEmitter.prototype.once=function(type,listener){if(!isFunction(listener))throw TypeError("listener must be a function");var fired=false;function g(){this.removeListener(type,g);if(!fired){fired=true;listener.apply(this,arguments)}}g.listener=listener;this.on(type,g);return this};EventEmitter.prototype.removeListener=function(type,listener){var list,position,length,i;if(!isFunction(listener))throw TypeError("listener must be a function");if(!this._events||!this._events[type])return this;list=this._events[type];length=list.length;position=-1;if(list===listener||isFunction(list.listener)&&list.listener===listener){delete this._events[type];if(this._events.removeListener)this.emit("removeListener",type,listener)}else if(isObject(list)){for(i=length;i-- >0;){if(list[i]===listener||list[i].listener&&list[i].listener===listener){position=i;break}}if(position<0)return this;if(list.length===1){list.length=0;delete this._events[type]}else{list.splice(position,1)}if(this._events.removeListener)this.emit("removeListener",type,listener)}return this};EventEmitter.prototype.removeAllListeners=function(type){var key,listeners;if(!this._events)return this;if(!this._events.removeListener){if(arguments.length===0)this._events={};else if(this._events[type])delete this._events[type];return this}if(arguments.length===0){for(key in this._events){if(key==="removeListener")continue;this.removeAllListeners(key)}this.removeAllListeners("removeListener");this._events={};return this}listeners=this._events[type];if(isFunction(listeners)){this.removeListener(type,listeners)}else if(listeners){while(listeners.length)this.removeListener(type,listeners[listeners.length-1])}delete this._events[type];return this};EventEmitter.prototype.listeners=function(type){var ret;if(!this._events||!this._events[type])ret=[];else if(isFunction(this._events[type]))ret=[this._events[type]];else ret=this._events[type].slice();return ret};EventEmitter.prototype.listenerCount=function(type){if(this._events){var evlistener=this._events[type];if(isFunction(evlistener))return 1;else if(evlistener)return evlistener.length}return 0};EventEmitter.listenerCount=function(emitter,type){return emitter.listenerCount(type)};function isFunction(arg){return typeof arg==="function"}function isNumber(arg){return typeof arg==="number"}function isObject(arg){return typeof arg==="object"&&arg!==null}function isUndefined(arg){return arg===void 0}},{}],2:[function(require,module,exports){(function(global){"use strict";var _createClass=function(){function defineProperties(target,props){for(var i=0;i<props.length;i++){var descriptor=props[i];descriptor.enumerable=descriptor.enumerable||false;descriptor.configurable=true;if("value"in descriptor)descriptor.writable=true;Object.defineProperty(target,descriptor.key,descriptor)}}return function(Constructor,protoProps,staticProps){if(protoProps)defineProperties(Constructor.prototype,protoProps);if(staticProps)defineProperties(Constructor,staticProps);return Constructor}}();function _classCallCheck(instance,Constructor){if(!(instance instanceof Constructor)){throw new TypeError("Cannot call a class as a function")}}function _possibleConstructorReturn(self,call){if(!self){throw new ReferenceError("this hasn't been initialised - super() hasn't been called")}return call&&(typeof call==="object"||typeof call==="function")?call:self}function _inherits(subClass,superClass){if(typeof superClass!=="function"&&superClass!==null){throw new TypeError("Super expression must either be null or a function, not "+typeof superClass)}subClass.prototype=Object.create(superClass&&superClass.prototype,{constructor:{value:subClass,enumerable:false,writable:true,configurable:true}});if(superClass)Object.setPrototypeOf?Object.setPrototypeOf(subClass,superClass):subClass.__proto__=superClass}var events=require("events");var defaults=require("./utils/defaults");var defaultContext=require("./defaultContext");var WebAudioScheduler=function(_events$EventEmitter){_inherits(WebAudioScheduler,_events$EventEmitter);function WebAudioScheduler(opts){_classCallCheck(this,WebAudioScheduler);opts=opts||{};var _this=_possibleConstructorReturn(this,(WebAudioScheduler.__proto__||Object.getPrototypeOf(WebAudioScheduler)).call(this));_this.context=defaults(opts.context,defaultContext);_this.interval=defaults(opts.interval,.025);_this.aheadTime=defaults(opts.aheadTime,.1);_this.timerAPI=defaults(opts.timerAPI,global);_this.playbackTime=_this.currentTime;_this._timerId=0;_this._schedId=0;_this._scheds=[];return _this}_createClass(WebAudioScheduler,[{key:"start",value:function start(callback,args){var loop=this.process.bind(this);if(this._timerId===0){this._timerId=this.timerAPI.setInterval(loop,this.interval*1e3);this.emit("start");if(callback){this.insert(this.context.currentTime,callback,args);loop()}}else if(callback){this.insert(this.context.currentTime,callback,args)}return this}},{key:"stop",value:function stop(){var reset=arguments.length>0&&arguments[0]!==undefined?arguments[0]:true;if(this._timerId!==0){this.timerAPI.clearInterval(this._timerId);this._timerId=0;this.emit("stop")}if(reset){this._scheds.splice(0)}return this}},{key:"insert",value:function insert(time,callback,args){var id=++this._schedId;var event={id:id,time:time,callback:callback,args:args};var scheds=this._scheds;if(scheds.length===0||scheds[scheds.length-1].time<=time){scheds.push(event)}else{for(var i=0,imax=scheds.length;i<imax;i++){if(time<scheds[i].time){scheds.splice(i,0,event);break}}}return id}},{key:"nextTick",value:function nextTick(time,callback,args){if(typeof time==="function"){args=callback;callback=time;time=this.playbackTime}return this.insert(time+this.aheadTime,callback,args)}},{key:"remove",value:function remove(schedId){var scheds=this._scheds;if(typeof schedId==="number"){for(var i=0,imax=scheds.length;i<imax;i++){if(schedId===scheds[i].id){scheds.splice(i,1);break}}}return schedId}},{key:"removeAll",value:function removeAll(){this._scheds.splice(0)}},{key:"process",value:function process(){var t0=this.context.currentTime;var t1=t0+this.aheadTime;this._process(t0,t1)}},{key:"_process",value:function _process(t0,t1){var scheds=this._scheds;var playbackTime=t0;this.playbackTime=playbackTime;this.emit("process",{playbackTime:playbackTime});while(scheds.length&&scheds[0].time<t1){var event=scheds.shift();var _playbackTime=event.time;var args=event.args;this.playbackTime=_playbackTime;event.callback({playbackTime:_playbackTime,args:args})}this.playbackTime=playbackTime;this.emit("processed",{playbackTime:playbackTime})}},{key:"state",get:function get(){return this._timerId!==0?"running":"suspended"}},{key:"currentTime",get:function get(){return this.context.currentTime}},{key:"events",get:function get(){return this._scheds.slice()}}]);return WebAudioScheduler}(events.EventEmitter);module.exports=WebAudioScheduler}).call(this,typeof global!=="undefined"?global:typeof self!=="undefined"?self:typeof window!=="undefined"?window:{})},{"./defaultContext":3,"./utils/defaults":4,events:1}],3:[function(require,module,exports){"use strict";module.exports={get currentTime(){return Date.now()/1e3}}},{}],4:[function(require,module,exports){"use strict";function defaults(value,defaultValue){return value!==undefined?value:defaultValue}module.exports=defaults},{}],5:[function(require,module,exports){"use strict";module.exports=require("./WebAudioScheduler")},{"./WebAudioScheduler":2}]},{},[5])(5)});