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                 set_level(level_lufs, level_lufs);
  21         }
  22
  23         void set_level(float level_lufs_left, float level_lufs_right) {
  24                 std::unique_lock<std::mutex> lock(level_mutex);
  25                 this->level_lufs[0] = level_lufs_left;
  26                 this->level_lufs[1] = level_lufs_right;
  27                 QMetaObject::invokeMethod(this, "update", Qt::AutoConnection);
  28         }
  29
  30         double lufs_to_pos(float level_lu, int height)
  31         {
  32                 return ::lufs_to_pos(level_lu, height, min_level, max_level);
  33         }
  34
  35         void set_min_level(float min_level)
  36         {
  37                 this->min_level = min_level;
  38                 recalculate_pixmaps();
  39         }
  40
  41         void set_max_level(float max_level)
  42         {
  43                 this->max_level = max_level;
  44                 recalculate_pixmaps();
  45         }
  46
  47         void set_ref_level(float ref_level_lufs)
  48         {
  49                 this->ref_level_lufs = ref_level_lufs;
  50         }
  51
  52         void set_flip(bool flip)
  53         {
  54                 this->flip = flip;
  55                 recalculate_pixmaps();
  56         }
  57
  58 private:
  59         void resizeEvent(QResizeEvent *event) override;
  60         void paintEvent(QPaintEvent *event) override;
  61         void recalculate_pixmaps();
  62
  63         std::mutex level_mutex;
  64         float level_lufs[2] { -HUGE_VALF, -HUGE_VALF };
  65         float min_level = -18.0f, max_level = 9.0f, ref_level_lufs = -23.0f;
  66         bool flip = false;
  67
  68         QPixmap on_pixmap, off_pixmap;
  69 };
  70
  71 #endif