You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 

44 lines
1.2 KiB

/*
Copyright Jeroen Vreeken (jeroen@vreeken.net), 2016
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/>.
*/
#ifndef _INCLUDE_CTCSS_H_
#define _INCLUDE_CTCSS_H_
#include <stdlib.h>
#include <stdbool.h>
#include <stdint.h>
struct ctcss *ctcss_init(int rate, double f, double amp);
void ctcss_destroy(struct ctcss *ctcss);
int ctcss_reset(struct ctcss *ctcss);
int ctcss_add(struct ctcss *ctcss, int16_t *sound, int nr);
/* detection code in dsp.c */
int ctcss_detect_init(double freq, int rate);
bool ctcss_detect_rx(short *smp, int nr);
struct iir;
struct iir *filter_iir_create_8k_hp_300hz();
int filter_iir_2nd(struct iir *iir, short *smp, int nr);
#endif /* _INCLUDE_CTCSS_H_ */