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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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2
src/cnetz/cnetz.c
View File

@@ -306,7 +306,7 @@ int cnetz_create(int kanal, enum cnetz_chan_type chan_type, const char *audiodev
/* init general part of transceiver */
/* do not enable emphasis, since it is done by cnetz code, not by common sender code */
rc = sender_create(&cnetz->sender, kanal, cnetz_kanal2freq(kanal, 0), cnetz_kanal2freq(kanal, 1), audiodev, use_sdr, samplerate, rx_gain, 0, 0, write_rx_wave, write_tx_wave, read_rx_wave, read_tx_wave, loopback, 0, PAGING_SIGNAL_NONE);
rc = sender_create(&cnetz->sender, kanal, cnetz_kanal2freq(kanal, 0), cnetz_kanal2freq(kanal, 1), audiodev, use_sdr, samplerate, rx_gain, 0, 0, write_rx_wave, write_tx_wave, read_rx_wave, read_tx_wave, loopback, PAGING_SIGNAL_NONE);
if (rc < 0) {
PDEBUG(DCNETZ, DEBUG_ERROR, "Failed to init transceiver process!\n");
goto error;

2
src/cnetz/dsp.c
View File

@@ -550,7 +550,7 @@ static int fsk_distributed_encode(cnetz_t *cnetz, const char *bits)
/* decode samples and hut for bit changes
* use deviation to find greatest slope of the signal (bit change)
*/
void sender_receive(sender_t *sender, sample_t *samples, int length)
void sender_receive(sender_t *sender, sample_t *samples, int length, double __attribute__((unused)) rf_level_db)
{
cnetz_t *cnetz = (cnetz_t *) sender;