re-organize folder structure

include/videoviewerwidget.h

@@ -0,0 +1,82 @@
+#ifndef VIDEOVIEWERWIDGET_H
+#define VIDEOVIEWERWIDGET_H
+
+#include <QWidget>
+#include <QPushButton>
+#include <QComboBox>
+#include <QLineEdit>
+#include <QLabel>
+#include <QImage>
+#include <QSlider>
+#include <QScrollArea>
+#include <QCheckBox>
+#include <gst/gst.h>
+#include <gst/app/gstappsink.h>
+
+class VideoViewerWidget : public QWidget
+{
+    Q_OBJECT
+
+public:
+    explicit VideoViewerWidget(QWidget *parent = nullptr);
+    ~VideoViewerWidget() override;
+
+signals:
+    void newFrameAvailable(const QImage& frame);
+
+private slots:
+    void onStartViewer();
+    void onStopViewer();
+    void onSourceTypeChanged(int index);
+    void onZoomChanged(int value);
+    void onRotationChanged(int index);
+    void onFlipHorizontalChanged(Qt::CheckState state);
+    void onFlipVerticalChanged(Qt::CheckState state);
+    void displayFrame(const QImage& frame);
+
+private:
+    void setupUI();
+    void initGStreamer();
+    void cleanupGStreamer();
+    void startPipeline();
+    void stopPipeline();
+    QString buildPipelineString() const;
+
+    static gboolean busCallback(GstBus* bus, GstMessage* msg, gpointer data);
+    static GstFlowReturn newSampleCallback(GstAppSink* appsink, gpointer user_data);
+
+    // UI elements (8-byte pointers)
+    QScrollArea* m_scrollArea;
+    QLabel* m_videoDisplay;
+    QPushButton* m_startBtn;
+    QPushButton* m_stopBtn;
+    QComboBox* m_sourceType;
+    QLineEdit* m_hostEdit;
+    QLineEdit* m_portEdit;
+    QLabel* m_statusLabel;
+    QSlider* m_zoomSlider;
+    QLabel* m_zoomLabel;
+    QComboBox* m_rotationCombo;
+    QCheckBox* m_flipHorizontal;
+    QCheckBox* m_flipVertical;
+
+    // GStreamer elements (8-byte pointers)
+    GstElement* m_pipeline;
+    GstElement* m_appSink;
+
+    // Zoom factor (8-byte double)
+    double m_zoomFactor;
+
+    // Bus watch ID (4-byte unsigned int)
+    guint m_busWatchId;
+
+    // Transformation settings (4 bytes + 2 bytes)
+    int m_rotationAngle;
+    bool m_flipHorizontalEnabled;
+    bool m_flipVerticalEnabled;
+
+    // Video state (large object at end)
+    QImage m_currentFrame;
+};
+
+#endif // VIDEOVIEWERWIDGET_H