git.sesse.net Git - nageru/blob - lrameter.cpp

   1 #include "lrameter.h"
   2
   3 #include <QPainter>
   4 #include <QPalette>
   5 #include <QPen>
   6 #include "vu_common.h"
   7
   8 class QPaintEvent;
   9
  10 using namespace std;
  11
  12 LRAMeter::LRAMeter(QWidget *parent)
  13         : QWidget(parent)
  14 {
  15 }
  16
  17 void LRAMeter::resizeEvent(QResizeEvent *event)
  18 {
  19         recalculate_pixmaps();
  20 }
  21
  22 void LRAMeter::paintEvent(QPaintEvent *event)
  23 {
  24         QPainter painter(this);
  25
  26         float level_lufs;
  27         float range_low_lufs;
  28         float range_high_lufs;
  29         {
  30                 unique_lock<mutex> lock(level_mutex);
  31                 level_lufs = this->level_lufs;
  32                 range_low_lufs = this->range_low_lufs;
  33                 range_high_lufs = this->range_high_lufs;
  34         }
  35
  36         float level_lu = level_lufs - ref_level_lufs;
  37         float range_low_lu = range_low_lufs - ref_level_lufs;
  38         float range_high_lu = range_high_lufs - ref_level_lufs;
  39         int range_low_pos = lrint(lufs_to_pos(range_low_lu, height()));
  40         int range_high_pos = lrint(lufs_to_pos(range_high_lu, height()));
  41
  42         QRect top_off_rect(0, 0, width(), range_high_pos);
  43         QRect on_rect(0, range_high_pos, width(), range_low_pos - range_high_pos);
  44         QRect bottom_off_rect(0, range_low_pos, width(), height() - range_low_pos);
  45
  46         painter.drawPixmap(top_off_rect, off_pixmap, top_off_rect);
  47         painter.drawPixmap(on_rect, on_pixmap, on_rect);
  48         painter.drawPixmap(bottom_off_rect, off_pixmap, bottom_off_rect);
  49
  50         // Draw the target area (+/-1 LU is allowed EBU range).
  51         // It turns green when we're within.
  52         int min_y = lrint(lufs_to_pos(1.0f, height()));
  53         int max_y = lrint(lufs_to_pos(-1.0f, height()));
  54
  55         // FIXME: This outlining isn't so pretty.
  56         {
  57                 QPen pen(Qt::black);
  58                 pen.setWidth(5);
  59                 painter.setPen(pen);
  60                 painter.drawRect(2, min_y, width() - 5, max_y - min_y);
  61         }
  62         {
  63                 QPen pen;
  64                 if (level_lu >= -1.0f && level_lu <= 1.0f) {
  65                         pen.setColor(Qt::green);
  66                 } else {
  67                         pen.setColor(Qt::red);
  68                 }
  69                 pen.setWidth(3);
  70                 painter.setPen(pen);
  71                 painter.drawRect(2, min_y, width() - 5, max_y - min_y);
  72         }
  73
  74         // Draw the integrated loudness meter, in the same color as the target area.
  75         int y = lrint(lufs_to_pos(level_lu, height()));
  76         {
  77                 QPen pen(Qt::black);
  78                 pen.setWidth(5);
  79                 painter.setPen(pen);
  80                 painter.drawRect(2, y, width() - 5, 1);
  81         }
  82         {
  83                 QPen pen;
  84                 if (level_lu >= -1.0f && level_lu <= 1.0f) {
  85                         pen.setColor(Qt::green);
  86                 } else {
  87                         pen.setColor(Qt::red);
  88                 }
  89                 pen.setWidth(3);
  90                 painter.setPen(pen);
  91                 painter.drawRect(2, y, width() - 5, 1);
  92         }
  93 }
  94
  95 void LRAMeter::recalculate_pixmaps()
  96 {
  97         const int margin = 5;
  98
  99         on_pixmap = QPixmap(width(), height());
 100         QPainter on_painter(&on_pixmap);
 101         on_painter.fillRect(0, 0, width(), height(), parentWidget()->palette().window());
 102         draw_vu_meter(on_painter, width(), height(), margin, true, min_level, max_level);
 103
 104         off_pixmap = QPixmap(width(), height());
 105         QPainter off_painter(&off_pixmap);
 106         off_painter.fillRect(0, 0, width(), height(), parentWidget()->palette().window());
 107         draw_vu_meter(off_painter, width(), height(), margin, false, min_level, max_level);
 108 }