X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=vumeter.cpp;h=b697a834da3876533c06db888c16a42e8f209067;hb=96cb6414f85e0ef4d660b7bd56267303e80fcd05;hp=e56268ad46f0d6cddde59ba5d15b8134d9f411e7;hpb=8d0d68b7cca3a4c58268fa0822ca38bb1863dd19;p=nageru

diff --git a/vumeter.cpp b/vumeter.cpp
index e56268a..b697a83 100644
--- a/vumeter.cpp
+++ b/vumeter.cpp
@@ -1,49 +1,76 @@
+#include "vumeter.h"
+
 #include <QPainter>
+#include <QRect>
+#include "vu_common.h"
 
-#include "vumeter.h"
+class QPaintEvent;
+class QResizeEvent;
 
 using namespace std;
 
-namespace {
-
-int lufs_to_pos(float level_lu, int height)
+VUMeter::VUMeter(QWidget *parent)
+	: QWidget(parent)
 {
-	const float min_level = 18.0f;    // y=0 is top of screen, so “min” is the loudest level.
-	const float max_level = -36.0f;
-	int y = lrintf(height * (level_lu - min_level) / (max_level - min_level));
-	y = std::max(y, 0);
-	y = std::min(y, height - 1);
-	return y;
 }
 
-}  // namespace
-
-VUMeter *global_vu_meter = nullptr;
-QLabel *global_peak_display = nullptr;
-
-VUMeter::VUMeter(QWidget *parent)
-	: QWidget(parent)
+void VUMeter::resizeEvent(QResizeEvent *event)
 {
+	recalculate_pixmaps();
 }
 
 void VUMeter::paintEvent(QPaintEvent *event)
 {
 	QPainter painter(this);
 
-	painter.fillRect(0, 0, width(), height(), Qt::black);
-
-	int min_y = lufs_to_pos(1.0f, height());
-	int max_y = lufs_to_pos(-1.0f, height());
-	painter.fillRect(0, min_y, width(), max_y - min_y, Qt::green);
-
-	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 y = lufs_to_pos(level_lu, height());
-	painter.setPen(Qt::white);
-	painter.drawLine(0, y, width(), y);
+	int mid = width() / 2;
+
+	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()));
+
+		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);
+	full_on_painter.fillRect(0, 0, width(), height(), parentWidget()->palette().window());
+	draw_vu_meter(full_on_painter, width(), height(), 0, 0.0, true, min_level, max_level, /*flip=*/false);
+
+	float margin = 0.5 * (width() - 20);
+
+	on_pixmap = QPixmap(width(), height());
+	QPainter on_painter(&on_pixmap);
+	on_painter.fillRect(0, 0, width(), height(), parentWidget()->palette().window());
+	draw_vu_meter(on_painter, width(), height(), margin, 2.0, true, min_level, max_level, /*flip=*/false);
+
+	off_pixmap = QPixmap(width(), height());
+	QPainter off_painter(&off_pixmap);
+	off_painter.fillRect(0, 0, width(), height(), parentWidget()->palette().window());
+	draw_vu_meter(off_painter, width(), height(), margin, 2.0, false, min_level, max_level, /*flip=*/false);
 }