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Add second pocsag proc for experimenting (#1428)

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Kyle Reed 2023-08-30 23:05:49 -07:00 • committed by GitHub
parent 900086c1c9
commit 5d602ece5c
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10 changed files with 820 additions and 30 deletions
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6
firmware/baseband/dsp_squelch.cpp
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@ -36,6 +36,7 @@ bool FMSquelch::execute(const buffer_f32_t& audio) {
squelch_energy_buffer.size()};
non_audio_hpf.execute(audio, squelch_energy);
// "Non-audio" implies "noise" here. Find the loudest noise sample.
float non_audio_max_squared = 0;
for (const auto sample : squelch_energy_buffer) {
const float sample_squared = sample * sample;
@ -44,9 +45,14 @@ bool FMSquelch::execute(const buffer_f32_t& audio) {
}
}
// Is the noise less than the threshold?
return (non_audio_max_squared < threshold_squared);
}
void FMSquelch::set_threshold(const float new_value) {
threshold_squared = new_value * new_value;
}
bool FMSquelch::enabled() const {
return threshold_squared > 0.0;
}