libs/ardour/ardour/interpolation.h

   1 #include <math.h>
   2 #include "ardour/types.h"
   3
   4 #ifndef __interpolation_h__
   5 #define __interpolation_h__
   6
   7 namespace ARDOUR {
   8
   9 class Interpolation {
  10 protected:
  11         double   _speed, _target_speed;
  12
  13 public:
  14         Interpolation () : _speed(0.0L) {}
  15
  16         void set_speed (double new_speed)          { _speed = new_speed; }
  17         void set_target_speed (double new_speed)   { _target_speed = new_speed; }
  18
  19         double target_speed()          const { return _target_speed; }
  20         double speed()                 const { return _speed; }
  21
  22         virtual nframes_t interpolate (nframes_t nframes, Sample* input, Sample* output) = 0;
  23 };
  24
  25 class LinearInterpolation : public Interpolation {
  26 public:
  27         nframes_t interpolate (nframes_t nframes, Sample* input, Sample* output);
  28 };
  29
  30 } // namespace ARDOUR
  31
  32 #endif
  33