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jLynx 2023-05-19 08:16:05 +12:00 • committed by GitHub
parent 7aca7ce74d
commit 033c4e9a5b
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37
firmware/baseband/dsp_squelch.cpp
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@ -25,29 +25,28 @@
#include <array>
bool FMSquelch::execute(const buffer_f32_t& audio) {
if( threshold_squared == 0.0f ) {
return true;
}
if (threshold_squared == 0.0f) {
return true;
}
// TODO: No hard-coded array size.
std::array<float, N> squelch_energy_buffer;
const buffer_f32_t squelch_energy {
squelch_energy_buffer.data(),
squelch_energy_buffer.size()
};
non_audio_hpf.execute(audio, squelch_energy);
// TODO: No hard-coded array size.
std::array<float, N> squelch_energy_buffer;
const buffer_f32_t squelch_energy{
squelch_energy_buffer.data(),
squelch_energy_buffer.size()};
non_audio_hpf.execute(audio, squelch_energy);
float non_audio_max_squared = 0;
for(const auto sample : squelch_energy_buffer) {
const float sample_squared = sample * sample;
if( sample_squared > non_audio_max_squared ) {
non_audio_max_squared = sample_squared;
}
}
float non_audio_max_squared = 0;
for (const auto sample : squelch_energy_buffer) {
const float sample_squared = sample * sample;
if (sample_squared > non_audio_max_squared) {
non_audio_max_squared = sample_squared;
}
}
return (non_audio_max_squared < threshold_squared);
return (non_audio_max_squared < threshold_squared);
}
void FMSquelch::set_threshold(const float new_value) {
threshold_squared = new_value * new_value;
threshold_squared = new_value * new_value;
}