import Tone from "../core/Tone";
if (Tone.supported){

	if (!Tone.global.hasOwnProperty("OfflineAudioContext") && Tone.global.hasOwnProperty("webkitOfflineAudioContext")){
		Tone.global.OfflineAudioContext = Tone.global.webkitOfflineAudioContext;
	}

	//returns promise?
	var context = new OfflineAudioContext(1, 1, 44100);
	var ret = context.startRendering();
	if (!(ret && Tone.isFunction(ret.then))){
		OfflineAudioContext.prototype._native_startRendering = OfflineAudioContext.prototype.startRendering;
		OfflineAudioContext.prototype.startRendering = function(){
			return new Promise(function(done){
				this.oncomplete = function(e){
					done(e.renderedBuffer);
				};
				this._native_startRendering();
			}.bind(this));
		};
	}
}