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Adding Wefax demodulation mode inside Audio App (#2539)

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* Adding_new_WFAX_GUI_mode_Audio_App

* Wefax_APT_demodulation_structure

* Solving REC Apt signal.wav from WFAX

* clang format issues

* correcting comments
This commit is contained in:
Brumi-2021 2025-03-05 04:27:18 +01:00 • committed by GitHub
parent b6e498a6d3
commit 52c3760e90
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19 changed files with 383 additions and 55 deletions
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28
firmware/baseband/proc_am_audio.cpp
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@ -27,6 +27,7 @@
#include "event_m4.hpp"
#include <array>
#include "dsp_hilbert.hpp"
void NarrowbandAMAudio::execute(const buffer_c8_t& buffer) {
if (!configured) {
@ -44,16 +45,28 @@ void NarrowbandAMAudio::execute(const buffer_c8_t& buffer) {
// TODO: Feed channel_stats post-decimation data?
feed_channel_stats(channel_out);
auto audio = demodulate(channel_out);
auto audio = demodulate(channel_out); // now 3 AM demodulation types : demod_am, demod_ssb, demod_ssb_fm (for Wefax)
audio_compressor.execute_in_place(audio);
audio_output.write(audio);
}
buffer_f32_t NarrowbandAMAudio::demodulate(const buffer_c16_t& channel) {
if (modulation_ssb) {
return demod_ssb.execute(channel, audio_buffer);
} else {
return demod_am.execute(channel, audio_buffer);
switch (modulation_ssb) { // enum class Modulation : int32_t {DSB = 0, SSB = 1, SSB_FM = 2}
case (int)(AMConfigureMessage::Modulation::DSB):
return demod_am.execute(channel, audio_buffer);
break;
case (int)(AMConfigureMessage::Modulation::SSB):
return demod_ssb.execute(channel, audio_buffer);
break;
case (int)(AMConfigureMessage::Modulation::SSB_FM): // Added to handle Weather Fax mode.
// chDbgPanic("case SSB_FM demodulation"); // Debug.
return demod_ssb_fm.execute(channel, audio_buffer); // Calling a derivative of demod_ssb (USB) , but with different FIR taps + FM audio tones demod.
break;
default:
break;
}
}
@ -98,8 +111,9 @@ void NarrowbandAMAudio::configure(const AMConfigureMessage& message) {
channel_filter_high_f = message.channel_filter.high_frequency_normalized * channel_filter_input_fs;
channel_filter_transition = message.channel_filter.transition_normalized * channel_filter_input_fs;
channel_spectrum.set_decimation_factor(1.0f);
modulation_ssb = (message.modulation == AMConfigureMessage::Modulation::SSB);
audio_output.configure(message.audio_hpf_config);
// modulation_ssb = (message.modulation == AMConfigureMessage::Modulation::SSB); // originally we had just 2 AM types of demod. (DSB , SSB)
modulation_ssb = (int)message.modulation; // now sending by message , 3 types of AM demod : enum class Modulation : int32_t {DSB = 0, SSB = 1, SSB_FM = 2}
audio_output.configure(message.audio_hpf_lpf_config); // hpf in all AM demod modes (AM-6K/9K, USB/LSB,DSB), except Wefax (lpf there).
configured = true;
}