mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-29 19:28:47 -05:00
49 lines
1.8 KiB
C++
49 lines
1.8 KiB
C++
/*
|
|
Copyright (C) 2018 James C. Ahlstrom
|
|
|
|
All rights reserved.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License version 2.1, as
|
|
published by the Free Software Foundation. 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 Lesser General Public License
|
|
along with this program; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef __FILTER__
|
|
#define __FILTER__
|
|
|
|
#include <complex>
|
|
|
|
namespace FreeDV
|
|
{
|
|
|
|
struct quisk_cfFilter { // Structure to hold the static data for FIR filters
|
|
float * dCoefs; // real filter coefficients
|
|
std::complex<float> * cpxCoefs; // complex filter coefficients
|
|
int nBuf; // dimension of cBuf
|
|
int nTaps; // dimension of dSamples, cSamples, dCoefs
|
|
int decim_index; // index of next sample for decimation
|
|
std::complex<float> * cSamples; // storage for old samples
|
|
std::complex<float> * ptcSamp; // next available position in cSamples
|
|
std::complex<float> * cBuf; // auxillary buffer for interpolation
|
|
} ;
|
|
|
|
extern int quisk_cfInterpDecim(std::complex<float> *, int, struct quisk_cfFilter *, int, int);
|
|
extern void quisk_filt_cfInit(struct quisk_cfFilter *, float *, int);
|
|
extern void quisk_filt_destroy(struct quisk_cfFilter *);
|
|
extern void quisk_cfTune(struct quisk_cfFilter *, float);
|
|
extern void quisk_ccfFilter(std::complex<float> *, std::complex<float> *, int, struct quisk_cfFilter *);
|
|
|
|
extern float quiskFilt120t480[480];
|
|
extern float filtP550S750[160];
|
|
|
|
} // FreeDV
|
|
|
|
#endif
|