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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/nmt/nmt.c
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@@ -283,7 +283,7 @@ int nmt_create(int nmt_system, const char *country, int channel, enum nmt_chan_t
PDEBUG(DNMT, DEBUG_DEBUG, "Creating 'NMT' instance for channel = %d (sample rate %d).\n", channel, samplerate);
/* init general part of transceiver */
rc = sender_create(&nmt->sender, channel, nmt_channel2freq(nmt_system, country, channel, 0, NULL, NULL, NULL), nmt_channel2freq(nmt_system, country, channel, 1, NULL, NULL, NULL), audiodev, use_sdr, samplerate, rx_gain, pre_emphasis, de_emphasis, write_rx_wave, write_tx_wave, read_rx_wave, read_tx_wave, loopback, 0, PAGING_SIGNAL_NONE);
rc = sender_create(&nmt->sender, channel, nmt_channel2freq(nmt_system, country, channel, 0, NULL, NULL, NULL), nmt_channel2freq(nmt_system, country, channel, 1, NULL, NULL, NULL), audiodev, use_sdr, samplerate, rx_gain, pre_emphasis, de_emphasis, write_rx_wave, write_tx_wave, read_rx_wave, read_tx_wave, loopback, PAGING_SIGNAL_NONE);
if (rc < 0) {
PDEBUG(DNMT, DEBUG_ERROR, "Failed to init transceiver process!\n");
goto error;