void VUMeter::resizeEvent(QResizeEvent *event)
{
- on_pixmap = QPixmap(width(), height());
- QPainter on_painter(&on_pixmap);
- draw_vu_meter(on_painter, width(), height(), 0, true);
-
- off_pixmap = QPixmap(width(), height());
- QPainter off_painter(&off_pixmap);
- draw_vu_meter(off_painter, width(), height(), 0, false);
+ recalculate_pixmaps();
}
void VUMeter::paintEvent(QPaintEvent *event)
{
QPainter painter(this);
- float level_lufs;
+ float level_lufs[2], peak_lufs[2];
{
unique_lock<mutex> lock(level_mutex);
- level_lufs = this->level_lufs;
+ level_lufs[0] = this->level_lufs[0];
+ level_lufs[1] = this->level_lufs[1];
+ peak_lufs[0] = this->peak_lufs[0];
+ peak_lufs[1] = this->peak_lufs[1];
}
- float level_lu = level_lufs + 23.0f;
- int on_pos = lrint(lufs_to_pos(level_lu, height()));
- QRect off_rect(0, 0, width(), on_pos);
- QRect on_rect(0, on_pos, width(), height() - on_pos);
+ int mid = width() / 2;
- painter.drawPixmap(off_rect, off_pixmap, off_rect);
- painter.drawPixmap(on_rect, on_pixmap, on_rect);
+ for (unsigned channel = 0; channel < 2; ++channel) {
+ int left = (channel == 0) ? 0 : mid;
+ int right = (channel == 0) ? mid : width();
+ float level_lu = level_lufs[channel] - ref_level_lufs;
+ int on_pos = lrint(lufs_to_pos(level_lu, height()));
+
+ if (flip) {
+ QRect on_rect(left, 0, right - left, height() - on_pos);
+ QRect off_rect(left, height() - on_pos, right - left, height());
+
+ painter.drawPixmap(on_rect, on_pixmap, on_rect);
+ painter.drawPixmap(off_rect, off_pixmap, off_rect);
+ } else {
+ QRect off_rect(left, 0, right - left, on_pos);
+ QRect on_rect(left, on_pos, right - left, height() - on_pos);
+
+ painter.drawPixmap(off_rect, off_pixmap, off_rect);
+ painter.drawPixmap(on_rect, on_pixmap, on_rect);
+ }
+
+ float peak_lu = peak_lufs[channel] - ref_level_lufs;
+ if (peak_lu >= min_level && peak_lu <= max_level) {
+ int peak_pos = lrint(lufs_to_pos(peak_lu, height()));
+ QRect peak_rect(left, peak_pos - 1, right, 2);
+ painter.drawPixmap(peak_rect, full_on_pixmap, peak_rect);
+ }
+ }
+}
+
+void VUMeter::recalculate_pixmaps()
+{
+ full_on_pixmap = QPixmap(width(), height());
+ QPainter full_on_painter(&full_on_pixmap);
+ draw_vu_meter(full_on_painter, width(), height(), 0, 0.0, true, min_level, max_level, flip);
+
+ on_pixmap = QPixmap(width(), height());
+ QPainter on_painter(&on_pixmap);
+ draw_vu_meter(on_painter, width(), height(), 0, 2.0, true, min_level, max_level, flip);
+
+ off_pixmap = QPixmap(width(), height());
+ QPainter off_painter(&off_pixmap);
+ draw_vu_meter(off_painter, width(), height(), 0, 2.0, false, min_level, max_level, flip);
}