portapack-mayhem/mayhem-firmware
1
0
Fork 0
mirror of https://github.com/portapack-mayhem/mayhem-firmware.git synced 2026-09-10 08:39:29 +00:00
Code Issues Packages Projects Releases 10 Wiki Activity

Add sliding-frequency audio receiver tuning

Browse Source
This commit is contained in:
Belousov Oleg
2026-07-27 21:07:48 +03:00
parent c4f32ac436
commit ccf093b5d5
20 changed files with 790 additions and 69 deletions
Download Patch File Download Diff File Expand all files Collapse all files
firmware/baseband/proc_nfm_audio.cpp
+37 -8
View File
@@ -51,10 +51,26 @@ void NarrowbandFMAudio::execute(const buffer_c8_t& buffer) {
}
const auto decim_0_out = decim_0.execute(buffer, dst_buffer);
const auto decim_1_out = decim_1.execute(decim_0_out, dst_buffer);
const auto audio_decim_0_out = audio_decim_0.execute(decim_0_out, dst_buffer);
channel_spectrum.feed(decim_1_out, channel_filter_low_f, channel_filter_high_f, channel_filter_transition);
spectrum_samples += decim_0_out.count;
if (!spectrum_capture_active &&
spectrum_samples >= spectrum_interval_samples) {
spectrum_samples -= spectrum_interval_samples;
channel_spectrum.start_filtered_capture(2);
spectrum_capture_active = true;
}
if (spectrum_capture_active &&
channel_spectrum.feed_filtered(
audio_decim_0_out,
channel_filter_low_f,
channel_filter_high_f,
channel_filter_transition)) {
spectrum_capture_active = false;
}
const auto decim_1_out = translating_decim_1.execute(audio_decim_0_out, dst_buffer);
const auto channel_out = channel_filter.execute(decim_1_out, dst_buffer);
feed_channel_stats(channel_out);
@@ -141,6 +157,10 @@ void NarrowbandFMAudio::on_message(const Message* const message) {
pitch_rssi_config(*reinterpret_cast<const PitchRSSIConfigureMessage*>(message));
break;
case Message::ID::AudioDDCConfig:
ddc_config(*reinterpret_cast<const AudioDDCConfigMessage*>(message));
break;
default:
break;
}
@@ -150,22 +170,26 @@ void NarrowbandFMAudio::configure(const NBFMConfigureMessage& message) {
constexpr size_t decim_0_input_fs = baseband_fs;
constexpr size_t decim_0_output_fs = decim_0_input_fs / decim_0.decimation_factor;
constexpr size_t decim_1_input_fs = decim_0_output_fs;
constexpr size_t decim_1_output_fs = decim_1_input_fs / decim_1.decimation_factor;
constexpr size_t audio_decim_0_output_fs = decim_0_output_fs / 2;
constexpr size_t decim_1_output_fs =
audio_decim_0_output_fs / translating_decim_1.decimation_factor;
constexpr size_t channel_filter_input_fs = decim_1_output_fs;
const size_t channel_filter_output_fs = channel_filter_input_fs / message.channel_decimation;
const size_t demod_input_fs = channel_filter_output_fs;
decim_0.configure(message.decim_0_filter.taps);
decim_1.configure(message.decim_1_filter.taps);
decim_0.configure(message.decim_0_filter.taps, 33554432);
audio_decim_0.configure(taps_audio_wide_halfband_0.taps);
translating_decim_1.configure(
message.decim_1_filter.taps, audio_decim_0_output_fs);
channel_filter.configure(message.channel_filter.taps, message.channel_decimation);
demod.configure(demod_input_fs, message.deviation);
channel_filter_low_f = message.channel_filter.low_frequency_normalized * channel_filter_input_fs;
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);
channel_spectrum.set_decimation_factor(1);
spectrum_interval_samples =
decim_0_output_fs / spectrum_rate_hz;
audio_output.configure(message.audio_hpf_config, message.audio_deemph_config, (float)message.squelch_level / 100.0);
hpf.configure(audio_24k_hpf_30hz_config);
@@ -174,6 +198,11 @@ void NarrowbandFMAudio::configure(const NBFMConfigureMessage& message) {
configured = true;
}
void NarrowbandFMAudio::ddc_config(const AudioDDCConfigMessage& message) {
translating_decim_1.set_frequency(message.frequency);
channel_spectrum.set_channel_filter_offset(message.frequency);
}
void NarrowbandFMAudio::pitch_rssi_config(const PitchRSSIConfigureMessage& message) {
pitch_rssi_enabled = message.enabled;
tone_delta = (message.rssi + 1000) * ((1ULL << 32) / 24000);