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Implementation of RX level squelch (for A-Netz and B-Netz)

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Use -S <dB> for setting RF level or use -S auto for auto level.

When squelch closes, audio is muted. If squelch is closed for some
seconds (depending on network), call is released. (RF loss condition)

The previous loss detection has been removed
This commit is contained in:
Andreas Eversberg
2017-10-09 20:49:14 +02:00
parent f7a0e4622b
commit b32e0ab602
33 changed files with 310 additions and 263 deletions
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6
src/anetz/anetz.h
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@@ -1,3 +1,4 @@
#include "../common/squelch.h"
#include "../common/goertzel.h"
#include "../common/sender.h"
@@ -46,13 +47,14 @@ typedef struct anetz {
int paging_tone; /* current tone (0..3) in sequenced mode */
int paging_count; /* current sample count of tone in seq. mode */
int paging_transition; /* set to number of samples during transition */
squelch_t squelch; /* squelch detection process */
} anetz_t;
double anetz_kanal2freq(int kanal, int unterband);
int anetz_init(void);
int anetz_create(int kanal, const char *audiodev, int use_sdr, int samplerate, double rx_gain, double page_gain, int page_sequence, int pre_emphasis, int de_emphasis, const char *write_rx_wave, const char *write_tx_wave, const char *read_rx_wave, const char *read_tx_wave, int loopback, double loss_volume);
int anetz_create(int kanal, const char *audiodev, int use_sdr, int samplerate, double rx_gain, double page_gain, int page_sequence, int pre_emphasis, int de_emphasis, const char *write_rx_wave, const char *write_tx_wave, const char *read_rx_wave, const char *read_tx_wave, int loopback, double squelch_db);
void anetz_destroy(sender_t *sender);
void anetz_loss_indication(anetz_t *anetz);
void anetz_loss_indication(anetz_t *anetz, double loss_time);
void anetz_receive_tone(anetz_t *anetz, int bit);