'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 _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 Transform=require('stream').Transform;var Volume=(function(_Transform){_inherits(Volume,_Transform);function Volume(volume){_classCallCheck(this,Volume);_Transform.call(this);this.set(volume);}Volume.prototype.get = function get(){return this.volume;};Volume.prototype.set = function set(volume){this.volume = volume === undefined?1:volume;};Volume.prototype._transform = function _transform(buffer,encoding,callback){var out=new Buffer(buffer.length);for(var i=0;i < buffer.length;i += 2) { // Read Int16, multiple with multiplier and round down
//console.log(this.volume, this.multiplier, buffer.readInt16LE(i));
var uint=Math.floor(this.multiplier * buffer.readInt16LE(i)); // Ensure value stays within 16bit
uint = Math.min(32767,uint);uint = Math.max(-32767,uint); // Write 2 new bytes into other buffer;
out.writeInt16LE(uint,i);}this.push(out);callback();};_createClass(Volume,[{key:'volume',get:function get(){return this._volume === undefined?1:this._volume;},set:function set(value){this._volume = value;}},{key:'multiplier',get:function get(){return Math.tan(this.volume);}}]);return Volume;})(Transform);module.exports = Volume;