Subversion Repositories DIN Is Noise

/*

* fft.h

* DIN Is Noise is copyright (c) 2006-2024 Jagannathan Sampath

* DIN Is Noise is released under GNU Public License 2.0

* For more information, please visit https://dinisnoise.org/

*/

#ifndef __fft

#define __fft

#include <vector>

#include "arrow_button.h"

#include "label.h"

#include "levels.h"

#include "kiss_fft.h"

struct multi_curve;

struct fft : widget, click_listener {

  //

  // FFT of Bezier curve waveform using kissFFT

  //

  kiss_fft_cfg cfg;

  static const int NUM_SAMPLES = 128;

  float in [NUM_SAMPLES];

  kiss_fft_cpx cx_in [NUM_SAMPLES], cx_out [NUM_SAMPLES];

  std::vector<float> harms; // harmonics

  levels lev; // levels of harmonics

  void go (multi_curve* crv); // do fft on a multiple segment bezier curve

  float f; // audio frequency used for fft

  float x, dx; // on bezier curve, or theta/dtheta on sine.

  fft ();

  ~fft ();

  // ui

  arrow_button ab_fold;

  label l_title;

  void setup ();

  void update ();

  int handle_input ();

  void draw ();

  void clicked (button& b);

  int folded ();

};

extern fft fft0;

#endif