vu_meter.hpp

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#ifndef VUMETER_MODE_H
#define VUMETER_MODE_H
 
 
#include "src/modes/include/colors/palettes.hpp"
 
#include "src/modes/include/audio/utils.hpp"
 
namespace lampda::modes::default_modes {
 
struct VuMeterMode : public BasicMode
{
  static constexpr auto palette = colors::PaletteGradient<colors::Red, colors::Green>;
 
  static void loop(auto& ctx)
  {
    auto& state = ctx.state;
    state.soundEvent.update(ctx);
 
    const float decibels = state.soundEvent.level;
 
    ctx.lamp.fadeToBlackBy(state.fade);
    const uint16_t maxLedIndex = ctx.lamp.ledCount - 1;
 
    // convert the sound level in the height lamp level
    const uint16_t vuLevel = lmpd_constrain<uint16_t>(
            lmpd_map<uint16_t>(
                    decibels, physical::microphone::silenceLevelDb, physical::microphone::highLevelDb, 0, maxLedIndex),
            ceilf(2.0 * ctx.lamp.maxWidthFloat),
            maxLedIndex);
 
    ctx.lamp.fill(palette, maxLedIndex - vuLevel, maxLedIndex);
  }
 
  static void on_enter_mode(auto& ctx)
  {
    ctx.state.fade = 128;
    ctx.state.soundEvent.reset(ctx);
  }
 
  struct StateTy
  {
    uint8_t fade;
    audio::SoundEventTy<> soundEvent;
  };
};
 
} // namespace lampda::modes::default_modes
 
#endif // VUMETER_MODE_H