Less choppy peak bars

Update the sample rate to 144 to keep up with high refresh rate
monitors.

src/mainwindow.cc

@@ -666,7 +666,7 @@ pa_stream* MainWindow::createMonitorStreamForSource(uint32_t source_idx, uint32_
 
     ss.channels = 1;
     ss.format = PA_SAMPLE_FLOAT32;
-    ss.rate = 25;
+    ss.rate = PEAKS_RATE;
 
     memset(&attr, 0, sizeof(attr));
     attr.fragsize = sizeof(float);

src/minimalstreamwidget.cc

@@ -61,7 +61,7 @@ void MinimalStreamWidget::init() {
     peakProgressBar.hide();
 }
 
-#define DECAY_STEP .04
+#define DECAY_STEP (1.0 / PEAKS_RATE)
 
 void MinimalStreamWidget::updatePeak(double v) {
 

src/minimalstreamwidget.h

@@ -23,6 +23,8 @@
 
 #include "pavucontrol.h"
 
+#define PEAKS_RATE 144
+
 class MinimalStreamWidget : public Gtk::VBox {
 public:
     MinimalStreamWidget(BaseObjectType* cobject);