use audio waveform constants to determine min/max zoom levels

app/audio/audiovisualwaveform.cpp

@@ -27,13 +27,12 @@
 
 namespace olive {
 
+const rational AudioVisualWaveform::kMinimumSampleRate = rational(1, 8);
+const rational AudioVisualWaveform::kMaximumSampleRate = 1024;
+
 AudioVisualWaveform::AudioVisualWaveform() :
   channels_(0)
 {
-  // Must be a power of 2
-  static const rational kMinimumSampleRate = rational(1, 8);
-  static const rational kMaximumSampleRate = 1024;
-
   for (rational i=kMinimumSampleRate; i<=kMaximumSampleRate; i*=2) {
     mipmapped_data_.insert({i, Sample()});
   }
@@ -431,15 +430,14 @@ int AudioVisualWaveform::time_to_samples(const double &time, double sample_rate)
 std::map<rational, AudioVisualWaveform::Sample>::const_iterator AudioVisualWaveform::GetMipmapForScale(double scale) const
 {
   // Find largest mipmap for this scale (or the largest if we don't find one sufficient)
-  auto using_mipmap = mipmapped_data_.cend();
-  using_mipmap--;
   for (auto it=mipmapped_data_.cbegin(); it!=mipmapped_data_.cend(); it++) {
     if (it->first.toDouble() >= scale) {
-      using_mipmap = it;
-      break;
+      return it;
     }
   }
-  return using_mipmap;
+
+  // We don't have a mipmap large enough for this scale, so just return the largest we have
+  return std::prev(mipmapped_data_.cend());
 }
 
 void AudioVisualWaveform::ExpandMinMax(AudioVisualWaveform::SamplePerChannel &sum, float value)

app/audio/audiovisualwaveform.h

@@ -107,6 +107,10 @@ public:
 
   static void DrawWaveform(QPainter* painter, const QRect &rect, const double &scale, const AudioVisualWaveform& samples, const rational &start_time);
 
+  // Must be a power of 2
+  static const rational kMinimumSampleRate;
+  static const rational kMaximumSampleRate;
+
 private:
   static void ExpandMinMax(SamplePerChannel &sum, float value);
 

app/widget/nodeparamview/nodeparamview.cpp

@@ -128,8 +128,6 @@ NodeParamView::NodeParamView(QWidget *parent) :
   // Set a default scale - FIXME: Hardcoded
   SetScale(120);
 
-  SetMaximumScale(TimeBasedView::kMaximumScale);
-
   // Pickup on widget focus changes
   connect(qApp,
           &QApplication::focusChanged,

app/widget/timebased/timescaledobject.cpp

@@ -23,19 +23,17 @@
 #include <cfloat>
 #include <QtMath>
 
+#include "audio/audiovisualwaveform.h"
 #include "common/clamp.h"
 
 namespace olive {
 
-// Keep this aligned with the kMaximumSampleRate in AudioVisualWaveform
-const double TimeScaledObject::kMaximumScale = 1024;
-
 const int TimeScaledObject::kCalculateDimensionsPadding = 10;
 
 TimeScaledObject::TimeScaledObject() :
   scale_(1.0),
   min_scale_(0),
-  max_scale_(kMaximumScale)
+  max_scale_(AudioVisualWaveform::kMaximumSampleRate.toDouble())
 {
 }
 

app/widget/timebased/timescaledobject.h

@@ -44,6 +44,7 @@ public:
   static rational SceneToTime(const double &x, const double& x_scale, const rational& timebase, bool round = false);
 
   const double& GetScale() const;
+  const double &GetMaximumScale() const { return max_scale_; }
 
   void SetScale(const double& scale);
 
@@ -54,8 +55,6 @@ public:
   double TimeToScene(const rational& time) const;
   rational SceneToTime(const double &x, bool round = false) const;
 
-  static const double kMaximumScale;
-
 protected:
   virtual void TimebaseChangedEvent(const rational&){}
 

app/widget/timelinewidget/tool/zoom.cpp

@@ -68,7 +68,7 @@ void ZoomTool::MouseRelease(TimelineViewMouseEvent *event)
     // Normalize scale to 1.0 scale
     double scene_width = (scene_right - scene_left) / parent()->GetScale();
 
-    double new_scale = qMin(TimeBasedView::kMaximumScale, static_cast<double>(reference_view->viewport()->width()) / scene_width);
+    double new_scale = qMin(parent()->GetFirstTimelineView()->GetMaximumScale(), static_cast<double>(reference_view->viewport()->width()) / scene_width);
 
     parent()->SetScale(new_scale);