SDRPlusPlus/decoder_modules/radio/src/demodulators/wfm.h

#pragma once
#include "../demod.h"
#include <dsp/demod/broadcast_fm.h>

namespace demod {
    class WFM : public Demodulator {
    public:
        WFM() {}

        WFM(std::string name, ConfigManager* config, dsp::stream<dsp::complex_t>* input, double bandwidth, EventHandler<dsp::stream<dsp::stereo_t>*> outputChangeHandler, EventHandler<float> afbwChangeHandler, double audioSR) {
            init(name, config, input, bandwidth, outputChangeHandler, afbwChangeHandler, audioSR);
        }

        ~WFM() {
            stop();
        }

        void init(std::string name, ConfigManager* config, dsp::stream<dsp::complex_t>* input, double bandwidth, EventHandler<dsp::stream<dsp::stereo_t>*> outputChangeHandler, EventHandler<float> afbwChangeHandler, double audioSR) {
            this->name = name;
            this->outputChangeHandler = outputChangeHandler;
            _config = config;

            // Load config
            _config->acquire();
            bool modified = false;
            if (config->conf[name][getName()].contains("stereo")) {
                _stereo = config->conf[name][getName()]["stereo"];
            }
            if (config->conf[name][getName()].contains("lowPass")) {
                _lowPass = config->conf[name][getName()]["lowPass"];
            }
            _config->release(modified);

            // Define structure
            demod.init(input, bandwidth / 2.0f, getIFSampleRate(), _stereo, _lowPass);
        }

        void start() {
            demod.start();
        }

        void stop() {
            demod.stop();
        }

        void showMenu() {
            if (ImGui::Checkbox(("Stereo##_radio_wfm_stereo_" + name).c_str(), &_stereo)) {
                setStereo(_stereo);
                _config->acquire();
                _config->conf[name][getName()]["stereo"] = _stereo;
                _config->release(true);
            }
            if (ImGui::Checkbox(("Low Pass##_radio_wfm_lowpass_" + name).c_str(), &_lowPass)) {
                demod.setLowPass(_lowPass);
                _config->acquire();
                _config->conf[name][getName()]["lowPass"] = _lowPass;
                _config->release(true);
            }
        }

        void setBandwidth(double bandwidth) {
            demod.setDeviation(bandwidth / 2.0f);
        }

        void setInput(dsp::stream<dsp::complex_t>* input) {
            demod.setInput(input);
        }

        void AFSampRateChanged(double newSR) {}

        // ============= INFO =============

        const char* getName() { return "WFM"; }
        double getIFSampleRate() { return 250000.0; }
        double getAFSampleRate() { return getIFSampleRate(); }
        double getDefaultBandwidth() { return 150000.0; }
        double getMinBandwidth() { return 50000.0; }
        double getMaxBandwidth() { return getIFSampleRate(); }
        bool getBandwidthLocked() { return false; }
        double getMaxAFBandwidth() { return 16000.0; }
        double getDefaultSnapInterval() { return 100000.0; }
        int getVFOReference() { return ImGui::WaterfallVFO::REF_CENTER; }
        bool getDeempAllowed() { return true; }
        bool getPostProcEnabled() { return true; }
        int getDefaultDeemphasisMode() { return DEEMP_MODE_50US; }
        double getAFBandwidth(double bandwidth) { return 16000.0; }
        bool getDynamicAFBandwidth() { return false; }
        bool getFMIFNRAllowed() { return true; }
        bool getNBAllowed() { return false; }
        dsp::stream<dsp::stereo_t>* getOutput() { return &demod.out; }

        // ============= DEDICATED FUNCTIONS =============

        void setStereo(bool stereo) {
            _stereo = stereo;
            demod.setStereo(_stereo);
        }

    private:
        dsp::demod::BroadcastFM demod;

        ConfigManager* _config = NULL;

        bool _stereo = false;
        bool _lowPass = true;

        std::string name;
        EventHandler<dsp::stream<dsp::stereo_t>*> outputChangeHandler;
    };
}