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/**
* Module to access some signal processing methods.
*
* The static methods defined in ptolemy.math.SignalProcessing are targeted.
* This module is under development. Only the FFT method has been implemented.
* @module dsp
* @author Ilge Akkaya
*/
// Stop extra messages from jslint. Note that there should be no
// space between the / and the * and global.
/*globals Java, exports */
/*jshint globalstrict: true*/
"use strict";
/** Construct an instance of a Signal object type. This should be instantiated in your
* JavaScript code as
* <pre>
* var dsp = require("dsp");
* var dspEngine = new dsp.Signal();
* </pre>
* An instance of this object type implements the following functions:
* <ul>
* <li> fft(signal): Return an object containing the real and imaginary parts of the Fast Fourier Transform ( FFT) of the input.
* <li> (TODO) ifft(coef): Return an object containing the real and imaginary parts of the inverse FFT of the input sequence.
* </ul>
* @param options A JSON object with fields 'FIXME' and 'FIXME' that give the
* TODO properties of the signal such as sample rate, etc. Provide reasonable
* defaults.
*/
var SignalProcessing = Java.type('ptolemy.math.SignalProcessing');
exports.Signal = function (options) {
// Provide default values for options using the following common JavaScript idiom.
};
/** Return an FFT.
* @param data An array of numbers.
*/
exports.Signal.prototype.fft = function (data) {
var outputReal = [];
outputReal = Java.type('ptolemy.math.SignalProcessing')["FFTRealOut(double[])"](data);
var outputImag = [];
outputImag = Java.type('ptolemy.math.SignalProcessing')["FFTImagOut(double[])"](data);
var output = {};
output.real = outputReal;
output.imag = outputImag;
return output;
};