add beginning of DAB decoder and add missing hardware donors to the credits

decoder_modules/dab_decoder/src/main.cpp

@@ -0,0 +1,163 @@
+#include <imgui.h>
+#include <config.h>
+#include <core.h>
+#include <gui/style.h>
+#include <gui/gui.h>
+#include <signal_path/signal_path.h>
+#include <module.h>
+#include <filesystem>
+#include <dsp/stream.h>
+#include <dsp/buffer/reshaper.h>
+#include <dsp/multirate/rational_resampler.h>
+#include <dsp/sink/handler_sink.h>
+#include <fstream>
+#include <chrono>
+#include "dab_dsp.h"
+#include <gui/widgets/constellation_diagram.h>
+
+#define CONCAT(a, b) ((std::string(a) + b).c_str())
+
+SDRPP_MOD_INFO{
+    /* Name:            */ "dab_decoder",
+    /* Description:     */ "DAB/DAB+ Decoder for SDR++",
+    /* Author:          */ "Ryzerth",
+    /* Version:         */ 0, 1, 0,
+    /* Max instances    */ -1
+};
+
+ConfigManager config;
+
+#define INPUT_SAMPLE_RATE   2.048e6
+#define VFO_BANDWIDTH       1.6e6
+
+class M17DecoderModule : public ModuleManager::Instance {
+public:
+    M17DecoderModule(std::string name)  {
+        this->name = name;
+
+        file = std::ofstream("sync4.f32", std::ios::out | std::ios::binary);
+
+        // Load config
+        config.acquire();
+        
+        config.release(true);
+
+        // Initialize VFO
+        vfo = sigpath::vfoManager.createVFO(name, ImGui::WaterfallVFO::REF_CENTER, 0, VFO_BANDWIDTH, INPUT_SAMPLE_RATE, VFO_BANDWIDTH, VFO_BANDWIDTH, true);
+        vfo->setSnapInterval(250);
+
+        // Initialize DSP here
+        csync.init(vfo->output, 1e-3, 246e-6, INPUT_SAMPLE_RATE);
+        ffsync.init(&csync.out);
+        ns.init(&ffsync.out, handler, this);
+
+        // Start DSO Here
+        csync.start();
+        ffsync.start();
+        ns.start();
+
+        gui::menu.registerEntry(name, menuHandler, this, this);
+    }
+
+    ~M17DecoderModule() {
+        gui::menu.removeEntry(name);
+        // Stop DSP Here
+        if (enabled) {
+            csync.stop();
+            ffsync.stop();
+            ns.stop();
+            sigpath::vfoManager.deleteVFO(vfo);
+        }
+
+        sigpath::sinkManager.unregisterStream(name);
+    }
+
+    void postInit() {}
+
+    void enable() {
+        double bw = gui::waterfall.getBandwidth();
+        vfo = sigpath::vfoManager.createVFO(name, ImGui::WaterfallVFO::REF_CENTER, std::clamp<double>(0, -bw / 2.0, bw / 2.0), VFO_BANDWIDTH, INPUT_SAMPLE_RATE, VFO_BANDWIDTH, VFO_BANDWIDTH, true);
+        vfo->setSnapInterval(250);
+
+        // Set Input of demod here
+        csync.setInput(vfo->output);
+
+        // Start DSP here
+        csync.start();
+        ffsync.start();
+        ns.start();
+
+        enabled = true;
+    }
+
+    void disable() {
+        // Stop DSP here
+        csync.stop();
+        ffsync.stop();
+        ns.stop();
+
+        sigpath::vfoManager.deleteVFO(vfo);
+        enabled = false;
+    }
+
+    bool isEnabled() {
+        return enabled;
+    }
+
+private:
+    static void menuHandler(void* ctx) {
+        M17DecoderModule* _this = (M17DecoderModule*)ctx;
+
+        float menuWidth = ImGui::GetContentRegionAvail().x;
+
+        if (!_this->enabled) { style::beginDisabled(); }
+
+        _this->constDiagram.draw();
+
+        if (!_this->enabled) { style::endDisabled(); }
+    }
+
+    std::ofstream file;
+
+    static void handler(dsp::complex_t* data, int count, void* ctx) {
+        M17DecoderModule* _this = (M17DecoderModule*)ctx;
+        //_this->file.write((char*)data, count * sizeof(dsp::complex_t));
+
+        dsp::complex_t* buf = _this->constDiagram.acquireBuffer();
+        memcpy(buf, data, 1024 * sizeof(dsp::complex_t));
+        _this->constDiagram.releaseBuffer();
+    }
+
+    std::string name;
+    bool enabled = true;
+
+    dab::CyclicSync csync;
+    dab::FrameFreqSync ffsync;
+    dsp::sink::Handler<dsp::complex_t> ns;
+
+    ImGui::ConstellationDiagram constDiagram;
+
+    // DSP Chain
+    VFOManager::VFO* vfo;
+};
+
+MOD_EXPORT void _INIT_() {
+    // Create default recording directory
+    json def = json({});
+    config.setPath(core::args["root"].s() + "/dab_decoder_config.json");
+    config.load(def);
+    config.enableAutoSave();
+}
+
+MOD_EXPORT ModuleManager::Instance* _CREATE_INSTANCE_(std::string name) {
+    return new M17DecoderModule(name);
+}
+
+MOD_EXPORT void _DELETE_INSTANCE_(void* instance) {
+    delete (M17DecoderModule*)instance;
+}
+
+MOD_EXPORT void _END_() {
+    config.disableAutoSave();
+    config.save();
+}