libs/ardour/ardour/latent.h

   1 #ifndef __ardour_latent_h__
   2 #define __ardour_latent_h__
   3
   4 #include "ardour/types.h"
   5
   6 namespace ARDOUR {
   7
   8 class Latent {
   9   public:
  10         Latent() : _own_latency (0), _user_latency (0) {}
  11         virtual ~Latent() {}
  12
  13         virtual nframes_t signal_latency() const = 0;
  14         nframes_t user_latency () const { return _user_latency; }
  15
  16         nframes_t effective_latency() const {
  17                 if (_user_latency) {
  18                         return _user_latency;
  19                 } else {
  20                         return signal_latency ();
  21                 }
  22         }
  23
  24         virtual void set_latency_delay (nframes_t val) { _own_latency = val; }
  25         virtual void set_user_latency (nframes_t val) { _user_latency = val; }
  26
  27   protected:
  28         nframes_t           _own_latency;
  29         nframes_t           _user_latency;
  30 };
  31
  32 }
  33
  34 #endif /* __ardour_latent_h__*/