des_filter.cpp

/*
    Copyright (C) 2014 Tony Kirke

    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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "des_filter.h"
#include "make_filter.h"

spuce::make_filter LPF;
spuce::make_filter* pLPF = &LPF;
float global_gain = 1.0;
bool changing_filter = false;
bool use_mono = false;

void set_fs(float f) { pLPF->set_fs(f); }
void lpf_init(int pts) { pLPF->init(pts);}
void reset() {	pLPF->reset();}
void set_gain(float g) { global_gain = g; }
void lpf_sel(const char* sel) { pLPF->sel_filter(sel); }
void set_filter_type(int t) { pLPF->set_filter_type(t); }
double horiz_swipe(int len, bool in_passband) { return(pLPF->horiz_swipe(len,in_passband)); }
double get_fc(int len, bool in_passband) { return(pLPF->get_fc(len,in_passband)); }
int    get_order() { return(pLPF->get_order()); }
bool is_fir() { return(pLPF->is_fir()); }
double ripple() { return(pLPF->ripple()); }
double stopdB() { return(pLPF->stopdB()); }
void vertical_swipe(int len,bool in_passband,bool above_stop) { pLPF->vertical_swipe(len,in_passband,above_stop); }

double update_w(double *w, double inc) { 
	changing_filter = true;
	double x = pLPF->update(w,inc);
	changing_filter = false;
	return(x);
}