implement dispmanx forwarding a a separate dispmanx wrapper

implement forwarding for amlogic grabber


Former-commit-id: 8a793d24bd083f9eca07c34ec3b222f0e54b4426

src/hyperion-dispmanx/DispmanxWrapper.h

@@ -0,0 +1,42 @@
+
+// QT includes
+#include <QTimer>
+
+// Hyperion-Dispmanx includes
+#include <grabber/DispmanxFrameGrabber.h>
+
+class DispmanxWrapper : public QObject
+{
+    Q_OBJECT
+public:
+    DispmanxWrapper(const unsigned grabWidth, const unsigned grabHeight, const unsigned updateRate_Hz);
+
+    const Image<ColorRgb> & getScreenshot();
+
+    ///
+    /// Starts the timed capturing of screenshots
+    ///
+    void start();
+
+    void stop();
+
+signals:
+    void sig_screenshot(const Image<ColorRgb> & screenshot);
+
+private slots:
+    ///
+    /// Performs a single screenshot capture and publishes the capture screenshot on the screenshot
+    /// signal.
+    ///
+    void capture();
+
+private:
+    /// The QT timer to generate capture-publish events
+    QTimer _timer;
+
+    /// The grabber for creating screenshots
+    DispmanxFrameGrabber _grabber;
+    Image<ColorRgb>   _screenshot_rgb;
+    Image<ColorRgba>  _screenshot;
+
+};