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RTL: Add input gain adjustments during ncurses session using g/G and update example usage (credit: ki4hyf);

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Group trunking shortcut key changed from g to T;
This commit is contained in:
lwvmobile
2026-02-19 21:07:44 -05:00
parent 9f03ad123d
commit b7cd501cc1
6 changed files with 57 additions and 8 deletions
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23
src/rtl_sdr_fm.cpp
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@@ -1031,6 +1031,7 @@ void open_rtlsdr_stream(dsd_opts *opts)
//this needs to be initted first, then we set the parameters
dongle_init(&dongle);
//init with low pass if decoding P25 or EDACS/Provoice
if (opts->frame_p25p1 == 1 || opts->frame_p25p2 == 1 || opts->frame_provoice == 1)
demod_init_ro2(&demod);
@@ -1089,7 +1090,7 @@ void open_rtlsdr_stream(dsd_opts *opts)
verbose_auto_gain(dongle.dev);
fprintf (stderr, "Setting RTL Autogain. \n");
} else {
dongle.gain = nearest_gain(dongle.dev, dongle.gain);
opts->rtl_gain_actual = dongle.gain = nearest_gain(dongle.dev, dongle.gain);
verbose_gain_set(dongle.dev, dongle.gain);
// fprintf (stderr, "Setting RTL Nearest Gain to %d. \n", dongle.gain); //seems to be working now
}
@@ -1151,6 +1152,26 @@ int get_rtlsdr_sample(int16_t *sample, dsd_opts * opts, dsd_state * state)
verbose_ppm_set(dongle.dev, dongle.ppm_error);
}
//if Gain or AGC Value is Manually Changed, Change it here now
if (opts->rtl_gain_actual != dongle.gain && opts->rtl_gain_value != 0)
{
dongle.gain = (opts->rtl_gain_value * 10);
opts->rtl_gain_actual = dongle.gain = nearest_gain(dongle.dev, dongle.gain);
verbose_gain_set(dongle.dev, dongle.gain);
//debug
// fprintf (stderr, "\n Dongle Gain Set: %d; \n", dongle.gain);
}
else if (opts->rtl_gain_value == 0 && dongle.gain != AUTO_GAIN)
{
opts->rtl_gain_actual = dongle.gain = AUTO_GAIN;
verbose_auto_gain(dongle.dev);
//debug
// fprintf (stderr, "\n AGC Set; \n");
}
while (output.queue.empty())
{
struct timespec ts;