kopia lustrzana https://github.com/Dsplib/libdspl-2.0
58 wiersze
1.7 KiB
C
58 wiersze
1.7 KiB
C
/*
|
|
* Copyright (c) 2015-2019 Sergey Bakhurin
|
|
* Digital Signal Processing Library [http://dsplib.org]
|
|
*
|
|
* This file is part of libdspl-2.0.
|
|
*
|
|
* is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* DSPL 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 Lesser General Public License
|
|
* along with Foobar. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include "dspl.h"
|
|
#include "dspl_internal.h"
|
|
|
|
|
|
|
|
/******************************************************************************
|
|
Analog prototype for IIR
|
|
*******************************************************************************/
|
|
int iir_ap(double rp, double rs, int ord, int type, double* b, double* a)
|
|
{
|
|
int err;
|
|
switch(type & DSPL_FILTER_APPROX_MASK)
|
|
{
|
|
case DSPL_FILTER_BUTTER:
|
|
err = butter_ap(rp, ord, b, a);
|
|
break;
|
|
case DSPL_FILTER_CHEBY1:
|
|
err = cheby1_ap(rp, ord, b, a);
|
|
break;
|
|
case DSPL_FILTER_CHEBY2:
|
|
err = cheby2_ap_wp1(rp, rs, ord, b, a);
|
|
break;
|
|
case DSPL_FILTER_ELLIP:
|
|
err = ellip_ap(rp, rs, ord, b, a);
|
|
break;
|
|
default:
|
|
err = ERROR_FILTER_APPROX;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
|
|
|
|
|