import Tone from "../core/Tone";
import "../core/Gain";
import "../signal/SignalBase";

/**
 *  @class Tone.Zero outputs 0's at audio-rate. The reason this has to be
 *         it's own class is that many browsers optimize out Tone.Signal
 *         with a value of 0 and will not process nodes further down the graph.
 *  @extends {Tone.SignalBase}
 */
Tone.Zero = function(){

	Tone.SignalBase.call(this);

	/**
	 *  The gain node
	 *  @type  {Tone.Gain}
	 *  @private
	 */
	this._gain = this.input = this.output = new Tone.Gain();

	Tone.connect(this.context.getConstant(0), this._gain);
};

Tone.extend(Tone.Zero, Tone.SignalBase);

/**
 *  clean up
 *  @return  {Tone.Zero}  this
 */
Tone.Zero.prototype.dispose = function(){
	Tone.SignalBase.prototype.dispose.call(this);
	this._gain.dispose();
	this._gain = null;
	return this;
};

export default Tone.Zero;