diff --git a/util.h b/util.h
new file mode 100644
index 0000000..2bcb204
--- /dev/null
+++ b/util.h
@@ -0,0 +1,21 @@
+#ifndef UTIL_H
+#define UTIL_H
+
+#include <vector>
+#include <iostream>
+
+enum Layout { horizontal, vertical };
+enum CameraMode {single, dual};
+
+struct ROI {
+    int x, y, width, height;
+};
+
+struct CameraLayout {
+    std::vector<std::string> devices;
+    std::vector<ROI> rois;
+    Layout layout;
+    CameraMode mode;
+};
+
+#endif /*UTIL_H*/
\ No newline at end of file