add visual scope

src/synth/Scope.hpp

@@ -8,10 +8,13 @@
 #include <vector>
 #include <atomic>
 
-class ScopeBuffer {
+class ScopeBuffer : public QObject  {
+
+    Q_OBJECT // needed to attach to a qml component
 
 public:
 
+    explicit ScopeBuffer(QObject* parent = nullptr);
     ScopeBuffer(size_t size);
     ~ScopeBuffer() = default;
 
@@ -22,7 +25,8 @@ public:
     void setWavelength(size_t wavelength) { wavelength_ = wavelength; } 
     size_t trigger() { return trigger_; }
     size_t wavelength() { return wavelength_; }
-    void spinlock(bool lock) { spinlock_ = lock; }
+    void spinlock(bool lock) { spinlock_.store(lock, std::memory_order_relaxed); }
+    bool spinlock() { return spinlock_.load(std::memory_order_relaxed); }
     size_t size() { return buffer_.size(); }
 
 private:
@@ -33,20 +37,21 @@ private:
     size_t trigger_ = 0;
     size_t wavelength_ = 400;
 
-    bool spinlock_ = false;
+    std::atomic<bool> spinlock_ = false;
 
 };
 
 class Scope : public QQuickPaintedItem {
 
     Q_OBJECT
-    QML_ELEMENT
+    Q_PROPERTY(ScopeBuffer* buffer WRITE setBuffer)
 
 public:
     explicit Scope(QQuickItem* parent = nullptr);
 
     void paint(QPainter* painter) override;
-    void setBuffer(ScopeBuffer* scopeBuffer) { scopeBuffer_ = scopeBuffer; }
+
+    void setBuffer(ScopeBuffer* scopeBuffer);
 
     std::vector<float> buffer_;
     ScopeBuffer* scopeBuffer_;