first commit

nodes/vp_screen_des_node.h

@@ -0,0 +1,35 @@
+
+
+#pragma once
+
+#include <opencv2/core/core.hpp>
+#include <opencv2/imgproc.hpp>
+#include <opencv2/videoio.hpp>
+#include "vp_des_node.h"
+
+namespace vp_nodes {
+    // screen des node, display video on local window.
+    class vp_screen_des_node: public vp_des_node
+    {
+    private:
+        /* data */
+        std::string gst_template = "appsrc ! videoconvert ! videoscale ! textoverlay text=%s halignment=left valignment=top font-desc='Sans,16' shaded-background=true ! timeoverlay halignment=right valignment=top font-desc='Sans,16' shaded-background=true ! queue ! fpsdisplaysink video-sink=ximagesink sync=false";
+        cv::VideoWriter screen_writer;
+    protected:
+        // re-implementation, return nullptr.
+        virtual std::shared_ptr<vp_objects::vp_meta> handle_frame_meta(std::shared_ptr<vp_objects::vp_frame_meta> meta) override; 
+        // re-implementation, return nullptr.
+        virtual std::shared_ptr<vp_objects::vp_meta> handle_control_meta(std::shared_ptr<vp_objects::vp_control_meta> meta) override;
+    public:
+        vp_screen_des_node(std::string node_name, 
+                            int channel_index, 
+                            bool osd = true,
+                            vp_objects::vp_size display_w_h = {});
+        ~vp_screen_des_node();
+
+        // for osd frame
+        bool osd;
+        // display size
+        vp_objects::vp_size display_w_h;
+    };
+}