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

   1 #ifndef VUMETER_H
   2 #define VUMETER_H
   3
   4 #include <math.h>
   5 #include <QPixmap>
   6 #include <QString>
   7 #include <QWidget>
   8 #include <mutex>
   9
  10 #include "vu_common.h"
  11
  12 class QObject;
  13 class QPaintEvent;
  14 class QResizeEvent;
  15
  16 class VUMeter : public QWidget
  17 {
  18         Q_OBJECT
  19
  20 public:
  21         VUMeter(QWidget *parent);
  22
  23         void set_level(float level_lufs) {
  24                 set_level(level_lufs, level_lufs);
  25         }
  26
  27         void set_level(float level_lufs_left, float level_lufs_right) {
  28                 std::unique_lock<std::mutex> lock(level_mutex);
  29                 this->level_lufs[0] = level_lufs_left;
  30                 this->level_lufs[1] = level_lufs_right;
  31                 QMetaObject::invokeMethod(this, "update", Qt::AutoConnection);
  32         }
  33
  34         void set_peak(float peak_lufs) {
  35                 set_peak(peak_lufs, peak_lufs);
  36         }
  37
  38         void set_peak(float peak_lufs_left, float peak_lufs_right) {
  39                 std::unique_lock<std::mutex> lock(level_mutex);
  40                 this->peak_lufs[0] = peak_lufs_left;
  41                 this->peak_lufs[1] = peak_lufs_right;
  42                 QMetaObject::invokeMethod(this, "update", Qt::AutoConnection);
  43         }
  44
  45         double lufs_to_pos(float level_lu, int height)
  46         {
  47                 return ::lufs_to_pos(level_lu, height, min_level, max_level);
  48         }
  49
  50         void set_min_level(float min_level)
  51         {
  52                 this->min_level = min_level;
  53                 recalculate_pixmaps();
  54         }
  55
  56         void set_max_level(float max_level)
  57         {
  58                 this->max_level = max_level;
  59                 recalculate_pixmaps();
  60         }
  61
  62         void set_ref_level(float ref_level_lufs)
  63         {
  64                 this->ref_level_lufs = ref_level_lufs;
  65         }
  66
  67 private:
  68         void resizeEvent(QResizeEvent *event) override;
  69         void paintEvent(QPaintEvent *event) override;
  70         void recalculate_pixmaps();
  71
  72         std::mutex level_mutex;
  73         float level_lufs[2] { -HUGE_VALF, -HUGE_VALF };
  74         float peak_lufs[2] { -HUGE_VALF, -HUGE_VALF };
  75         float min_level = -18.0f, max_level = 9.0f, ref_level_lufs = -23.0f;
  76
  77         QPixmap full_on_pixmap, on_pixmap, off_pixmap;
  78 };
  79
  80 #endif