Subversion Repositories DIN Is Noise

/*

* fader.h

* DIN Is Noise is copyright (c) 2006-2025 Jagannathan Sampath

* DIN Is Noise is released under GNU Public License 2.0

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

*/

#ifndef __FADER__

#define __FADER__

#include <string>

#include <fstream>

struct fader;

struct fade_listener {

  virtual void after_fade (fader& f) = 0;

};

struct fader {

  static double TIME; // default

  int on;

  float start;

  float end;

  float delta;

  int reached;

  float alpha;

  int flip; // end > start? 1:0

  float amount; // output

  double start_time, delta_time;

  fade_listener* afl;

  fader (double dt);

  fader (float vs = 0, float ve = 1);

  void set (float vs, float ve, int _on = 1, double dt = TIME);

  void copy (fader* src);

  int eval ();

  void restart ();

  void retime (double dt);

  void load (std::ifstream& f);

  void save (std::ofstream& f);

};

#endif