Stub implementation of LV2 persist extension.

[ardour.git] / libs / ardour / ardour / pi_controller.h

diff --git a/libs/ardour/ardour/pi_controller.h b/libs/ardour/ardour/pi_controller.h
index f992e6a18c1924297c8a6b65c15c008d7e197f02..a118fd739f2d722382d4dc945908b036b6d358e8 100644 (file)
--- a/libs/ardour/ardour/pi_controller.h
+++ b/libs/ardour/ardour/pi_controller.h
@@ -19,6 +19,8 @@
 #ifndef __libardour_pi_controller__
 #define __libardour_pi_controller__
 
+#include "ardour/types.h"
+
 class PIController {
 
   public:
@@ -31,7 +33,7 @@ class PIController {
            out_of_bounds ();
     }
         
-    double get_ratio (int fill_level);
+    double get_ratio (int fill_level, int period_size);
     void out_of_bounds();
 
   public:
@@ -48,6 +50,35 @@ class PIController {
     int     smooth_size;
     double  smooth_offset;
     double  current_resample_factor;
+    bool    fir_empty;
 };
 
+#define ESTIMATOR_SIZE 16
+
+class PIChaser {
+  public:
+    PIChaser();
+    ~PIChaser();
+
+    double get_ratio( framepos_t chasetime_measured, framepos_t chasetime, framepos_t slavetime_measured, framepos_t slavetime, bool in_control, int period_size );
+    void reset();
+    framepos_t want_locate() { return want_locate_val; }
+
+  private:
+    PIController *pic;
+    framepos_t realtime_stamps[ESTIMATOR_SIZE];
+    framepos_t chasetime_stamps[ESTIMATOR_SIZE];
+    int array_index;
+    framepos_t want_locate_val;
+
+    void feed_estimator( framepos_t realtime, framepos_t chasetime );
+    double get_estimate();
+
+    double speed;
+
+    double speed_threshold;
+    framepos_t pos_threshold;
+};
+
+
 #endif /* __libardour_pi_controller__ */