Threading and more

- webui remove restarts
- threading for LedDevice

include/utils/GlobalSignals.h

@@ -0,0 +1,41 @@
+#pragma once
+
+// util
+#include <utils/Image.h>
+#include <utils/ColorRgb.h>
+
+// qt
+#include <QObject>
+
+///
+/// Singleton instance for simple signal sharing across threads, should be never used with Qt:DirectConnection!
+///
+class GlobalSignals : public QObject
+{
+	Q_OBJECT
+public:
+    static GlobalSignals* getInstance()
+    {
+        static GlobalSignals instance;
+        return & instance;
+    }
+private:
+    GlobalSignals() {}
+
+public:
+    GlobalSignals(GlobalSignals const&)   = delete;
+    void operator=(GlobalSignals const&)  = delete;
+
+signals:
+	///
+	/// @brief PIPE SystemCapture images from GrabberWrapper to Hyperion class
+	/// @param image  The prepared image
+	///
+	void setSystemImage(const Image<ColorRgb>&  image);
+
+	///
+	/// @brief PIPE v4lCapture images from v4lCapture over HyperionDaemon to Hyperion class
+	/// @param image  The prepared image
+	///
+	void setV4lImage(const Image<ColorRgb> & image);
+};