Feature/sliding freq (#3280)

* Add sliding-frequency audio receiver tuning
* Move ADS-B receiver to external app
* Move AIS receiver to external app
* Move APRS receiver to external app
* Move APRS transmitter to external app
* Isolate filtered spectrum collection from WFM
* Fixed the issues #3280
* fpga_bridge.c: init registers per reference fpga_init, add quarter-shift mode setter
* radio.hpp: expose cached FPGA quarter-rate shift
* radio.cpp: program FPGA quarter-rate shift together with tuning offset
* tuning.hpp: pass AFE rate and direction to tuning config, add quarter_shift field
* tuning.cpp: import full PRALINE RX/TX tuning tables with quarter-shift offsets
* clock_manager: stop writing bogus RX digital gain, keep quarter shift across rate changes
* receiver_model: port LPF bandwidth from reference auto_bandwidth, use cached quarter shift
* adsb_rx: enable RF amp by default on first run
* ui_geomap.hpp: add hemisphere fields, degrees become magnitude
* ui_geomap: use hemisphere selector for lat/lon sign, fix minute/second wrap carry
* ui_menu: guard select against empty menu
* waterfall_designer: header updates for profile file handling
* waterfall_designer: exception-free profile parsing, CRLF handling, deferred nav callbacks, backup cleanup
* external.ld: scope app section globs to their own object directories
* CMakeLists: relink when external.ld changes
* tools: add external app symbol placement checker
* tools: add guru meditation address lookup script
* tools: add per-function stack usage report script
Co-authored-by: gullradriel <gullradriel@users.noreply.github.com>

firmware/baseband/proc_am_audio.hpp

@@ -28,10 +28,11 @@
 
 #include "dsp_decimate.hpp"
 #include "dsp_demodulate.hpp"
+#include "dsp_frequency_xlator.hpp"
 #include "audio_compressor.hpp"
 
 #include "audio_output.hpp"
-#include "spectrum_collector.hpp"
+#include "filtered_spectrum_collector.hpp"
 
 #include <cstdint>
 
@@ -44,6 +45,7 @@ class NarrowbandAMAudio : public BasebandProcessor {
 
    private:
     static constexpr size_t baseband_fs = 3072000;
+    static constexpr auto spectrum_rate_hz = 30.0f;
     static constexpr size_t decim_2_decimation_factor = 4;
     static constexpr size_t channel_filter_decimation_factor = 1;
 
@@ -56,14 +58,19 @@ class NarrowbandAMAudio : public BasebandProcessor {
         audio.data(),
         audio.size()};
 
-    dsp::decimate::FIRC8xR16x24FS4Decim8 decim_0{};
-    dsp::decimate::FIRC16xR16x32Decim8 decim_1{};
+    dsp::decimate::FIRC8xR16x24FS4Decim4 decim_0{};
+    dsp::decimate::FIRC16xR16x16Decim2 audio_decim_0{};
+    dsp::FrequencyTranslatingDecimator32By8 translating_decim_1{};
     dsp::decimate::FIRAndDecimateComplex decim_2{};
     dsp::decimate::FIRAndDecimateComplex channel_filter{};
     int32_t channel_filter_low_f = 0;
     int32_t channel_filter_high_f = 0;
     int32_t channel_filter_transition = 0;
     bool configured{false};
+    size_t spectrum_interval_samples{0};
+    size_t spectrum_samples{0};
+    bool spectrum_capture_active{false};
+    bool spectrum_zoom_x2{false};
 
     // bool modulation_ssb = false;  // Origianlly we only had 2 AM demod types {DSB = 0, SSB = 1} , and we could handle it with bool var , 1 bit.
     int8_t modulation_ssb = 0;  // Now we have 3 AM demod types we will send now index integer  {DSB = 0, SSB = 1, SSB_FM = 2}
@@ -73,7 +80,7 @@ class NarrowbandAMAudio : public BasebandProcessor {
     FeedForwardCompressor audio_compressor{};
     AudioOutput audio_output{};
 
-    SpectrumCollector channel_spectrum{};
+    FilteredSpectrumCollector channel_spectrum{};
 
     /* NB: Threads should be the last members in the class definition. */
 #ifdef PRALINE
@@ -86,6 +93,7 @@ class NarrowbandAMAudio : public BasebandProcessor {
 #endif
 
     void configure(const AMConfigureMessage& message);
+    void ddc_config(const AudioDDCConfigMessage& message);
     void capture_config(const CaptureConfigMessage& message);
 
     buffer_f32_t demodulate(const buffer_c16_t& channel);