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/*
* This file is part of din.
*
* din is copyright (c) 2006 - 2012 S Jagannathan <jag@dinisnoise.org>
* For more information, please visit http://dinisnoise.org
*
* din is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* din is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with din. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef __fft
#define __fft
#include <fftw3.h>
#include <levels.h>
#include <vector>
struct multi_curve;
struct fft {
//
// FFT of Bezier curve waveform using FFTW
//
fftwf_plan plan;
float* in;
fftwf_complex* out;
std::vector<float> harms; // harmonics
levels lev; // harmonics levels
void draw (); // draw levels
void go (multi_curve* crv); // do fft on a multiple segment bezier curve
float f; // audio frequency used for fft
int n; // num samples
int halfn;
float x, dx; // on bezier curve, or theta/dtheta on sine.
fft ();
~fft ();
};
#endif
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