git.sesse.net Git - nageru/blob - vumeter.h

   1 #ifndef VUMETER_H
   2 #define VUMETER_H
   3
   4 #include <math.h>
   5 #include <QLabel>
   6 #include <QPaintEvent>
   7 #include <QWidget>
   8 #include <mutex>
   9
  10 #include "vu_common.h"
  11
  12 class VUMeter : public QWidget
  13 {
  14         Q_OBJECT
  15
  16 public:
  17         VUMeter(QWidget *parent);
  18
  19         void set_level(float level_lufs) {
  20                 std::unique_lock<std::mutex> lock(level_mutex);
  21                 this->level_lufs = level_lufs;
  22                 QMetaObject::invokeMethod(this, "update", Qt::AutoConnection);
  23         }
  24
  25         double lufs_to_pos(float level_lu, int height)
  26         {
  27                 return ::lufs_to_pos(level_lu, height, min_level, max_level);
  28         }
  29
  30         void set_min_level(float min_level)
  31         {
  32                 this->min_level = min_level;
  33                 recalculate_pixmaps();
  34         }
  35
  36         void set_max_level(float max_level)
  37         {
  38                 this->max_level = max_level;
  39                 recalculate_pixmaps();
  40         }
  41
  42 private:
  43         void resizeEvent(QResizeEvent *event) override;
  44         void paintEvent(QPaintEvent *event) override;
  45         void recalculate_pixmaps();
  46
  47         std::mutex level_mutex;
  48         float level_lufs = -HUGE_VAL;
  49         float min_level = -18.0f, max_level = 9.0f;
  50
  51         QPixmap on_pixmap, off_pixmap;
  52 };
  53
  54 #endif