ref: 02839ae07d86a008421aadb9dbed29bfb4e49c78
dir: /src/biquad.h/
/*
Copyright (C) 2003 Paul Brossier
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 BIQUAD_H
#define BIQUAD_H
/** \file
* biquad filter
*
* \f$ y[n] = b_1 x[n] + b_2 x[n-1] + b_3 x[n-2] -
* a_2 y[n-1] - a_3 y[n-2] \f$
*/
#ifdef __cplusplus
extern "C" {
#endif
typedef struct _aubio_biquad_t aubio_biquad_t;
void aubio_biquad_do(aubio_biquad_t * b, fvec_t * in);
void aubio_biquad_do_filtfilt(aubio_biquad_t * b, fvec_t * in, fvec_t * tmp);
aubio_biquad_t * new_aubio_biquad(lsmp_t b1, lsmp_t b2, lsmp_t b3, lsmp_t a2, lsmp_t a3);
#ifdef __cplusplus
}
#endif
#endif /*BIQUAD_H*/