fusion-zauberstab/firmware/src/main.cpp

#include "zauberstab.h"
#include <vector>
#include "app.h"

struct BeatDetectApp beat_detect_app{};
struct VuMeterApp vu_meter_app {};
struct FFTTestApp fft_test_app {};

std::vector<std::reference_wrapper<App>> apps = {
    std::ref<App>(beat_detect_app),
    std::ref<App>(vu_meter_app),
    std::ref<App>(fft_test_app),
};

unsigned int current_app = 0;
unsigned int next_app;

void setup()
{
    next_app = current_app;
    zauberstab_init();
    Serial.begin(115200);

    apps[current_app].get().init();
}

void loop()
{
    if (next_app != current_app) {
        apps[current_app].get().deinit();
        apps[next_app].get().init();
        current_app = next_app;
        fadeToBlackBy(leds, NUM_LEDS, 0xFF);
    }

    apps[current_app].get().loop();
}