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

   1 #include "lrameter.h"
   2
   3 #include <QPainter>
   4 #include <QPalette>
   5 #include <QPen>
   6 #include <QRect>
   7
   8 #include "vu_common.h"
   9
  10 class QPaintEvent;
  11 class QResizeEvent;
  12
  13 using namespace std;
  14
  15 LRAMeter::LRAMeter(QWidget *parent)
  16         : QWidget(parent)
  17 {
  18 }
  19
  20 void LRAMeter::resizeEvent(QResizeEvent *event)
  21 {
  22         recalculate_pixmaps();
  23 }
  24
  25 void LRAMeter::paintEvent(QPaintEvent *event)
  26 {
  27         QPainter painter(this);
  28
  29         float level_lufs;
  30         float range_low_lufs;
  31         float range_high_lufs;
  32         {
  33                 unique_lock<mutex> lock(level_mutex);
  34                 level_lufs = this->level_lufs;
  35                 range_low_lufs = this->range_low_lufs;
  36                 range_high_lufs = this->range_high_lufs;
  37         }
  38
  39         float level_lu = level_lufs - ref_level_lufs;
  40         float range_low_lu = range_low_lufs - ref_level_lufs;
  41         float range_high_lu = range_high_lufs - ref_level_lufs;
  42         int range_low_pos = lrint(lufs_to_pos(range_low_lu, height()));
  43         int range_high_pos = lrint(lufs_to_pos(range_high_lu, height()));
  44
  45         QRect top_off_rect(0, 0, width(), range_high_pos);
  46         QRect on_rect(0, range_high_pos, width(), range_low_pos - range_high_pos);
  47         QRect bottom_off_rect(0, range_low_pos, width(), height() - range_low_pos);
  48
  49         painter.drawPixmap(top_off_rect, off_pixmap, top_off_rect);
  50         painter.drawPixmap(on_rect, on_pixmap, on_rect);
  51         painter.drawPixmap(bottom_off_rect, off_pixmap, bottom_off_rect);
  52
  53         // Draw the target area (+/-1 LU is allowed EBU range).
  54         // It turns green when we're within.
  55         int min_y = lrint(lufs_to_pos(1.0f, height()));
  56         int max_y = lrint(lufs_to_pos(-1.0f, height()));
  57
  58         // FIXME: This outlining isn't so pretty.
  59         {
  60                 QPen pen(Qt::black);
  61                 pen.setWidth(5);
  62                 painter.setPen(pen);
  63                 painter.drawRect(2, min_y, width() - 5, max_y - min_y);
  64         }
  65         {
  66                 QPen pen;
  67                 if (level_lu >= -1.0f && level_lu <= 1.0f) {
  68                         pen.setColor(Qt::green);
  69                 } else {
  70                         pen.setColor(Qt::red);
  71                 }
  72                 pen.setWidth(3);
  73                 painter.setPen(pen);
  74                 painter.drawRect(2, min_y, width() - 5, max_y - min_y);
  75         }
  76
  77         // Draw the integrated loudness meter, in the same color as the target area.
  78         int y = lrint(lufs_to_pos(level_lu, height()));
  79         {
  80                 QPen pen(Qt::black);
  81                 pen.setWidth(5);
  82                 painter.setPen(pen);
  83                 painter.drawRect(2, y, width() - 5, 1);
  84         }
  85         {
  86                 QPen pen;
  87                 if (level_lu >= -1.0f && level_lu <= 1.0f) {
  88                         pen.setColor(Qt::green);
  89                 } else {
  90                         pen.setColor(Qt::red);
  91                 }
  92                 pen.setWidth(3);
  93                 painter.setPen(pen);
  94                 painter.drawRect(2, y, width() - 5, 1);
  95         }
  96 }
  97
  98 void LRAMeter::recalculate_pixmaps()
  99 {
 100         const int margin = 5;
 101
 102         on_pixmap = QPixmap(width(), height());
 103         QPainter on_painter(&on_pixmap);
 104         on_painter.fillRect(0, 0, width(), height(), parentWidget()->palette().window());
 105         draw_vu_meter(on_painter, width(), height(), margin, 2.0, true, min_level, max_level, /*flip=*/false);
 106
 107         off_pixmap = QPixmap(width(), height());
 108         QPainter off_painter(&off_pixmap);
 109         off_painter.fillRect(0, 0, width(), height(), parentWidget()->palette().window());
 110         draw_vu_meter(off_painter, width(), height(), margin, 2.0, false, min_level, max_level, /*flip=*/false);
 111 }