williamp/osmocom-analog
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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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9
src/bnetz/bnetz.h
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@@ -1,3 +1,4 @@
#include "../common/squelch.h"
#include "../common/fsk.h"
#include "../common/sender.h"
@@ -93,11 +94,9 @@ typedef struct bnetz {
int tone_count; /* how long has that tone been detected */
const char *tx_telegramm; /* carries bits of one frame to transmit */
int tx_telegramm_pos;
int samples_per_chunk; /* samples per loss detection interval */
sample_t *chunk_spl; /* chunk sample */
int chunk_pos; /* current received sample of chunk */
double meter_phaseshift65536; /* how much the phase of sine wave changes per sample */
double meter_phase65536; /* current phase */
squelch_t squelch; /* squelch detection process */
/* loopback test for latency */
int loopback_count; /* count digits from 0 to 9 */
@@ -106,9 +105,9 @@ typedef struct bnetz {
double bnetz_kanal2freq(int kanal, int unterband);
int bnetz_init(void);
int bnetz_create(int kanal, const char *audiodev, int use_sdr, int samplerate, double rx_gain, int gfs, 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_factor, const char *paging, int metering);
int bnetz_create(int kanal, const char *audiodev, int use_sdr, int samplerate, double rx_gain, int gfs, 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, const char *paging, int metering);
void bnetz_destroy(sender_t *sender);
void bnetz_loss_indication(bnetz_t *bnetz);
void bnetz_loss_indication(bnetz_t *bnetz, double loss_time);
void bnetz_receive_tone(bnetz_t *bnetz, int bit);
void bnetz_receive_telegramm(bnetz_t *bnetz, uint16_t telegramm, double level_avg, double level_dev, double quality_avg);
const char *bnetz_get_telegramm(bnetz_t *bnetz);