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/*
Copyright (C) 2008 Torben Hohn
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __libardour_pi_controller__
#define __libardour_pi_controller__
#include "ardour/libardour_visibility.h"
#include "ardour/types.h"
class LIBARDOUR_API PIController {
public:
PIController (double resample_factor, int fir_size);
~PIController();
void reset (double resample_factor) {
resample_mean = resample_factor;
static_resample_factor = resample_factor;
out_of_bounds ();
}
double get_ratio (int fill_level, int period_size);
void out_of_bounds();
public:
double resample_mean;
double static_resample_factor;
double* offset_array;
double* window_array;
int offset_differential_index;
double offset_integral;
double catch_factor;
double catch_factor2;
double pclamp;
double controlquant;
int smooth_size;
double smooth_offset;
double current_resample_factor;
bool fir_empty;
};
#define ESTIMATOR_SIZE 16
class LIBARDOUR_API 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__ */
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