first commit

nodes/osd/vp_ba_jam_osd_node.h

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+#pragma once
+
+#include <map>
+#include <opencv2/freetype.hpp>
+#include "../vp_node.h"
+#include "../../objects/shapes/vp_point.h"
+#include "../../objects/shapes/vp_line.h"
+
+namespace vp_nodes {
+    // osd node for behaviour analysis of stop
+    class vp_ba_jam_osd_node: public vp_node
+    {
+    private:
+        // support chinese font
+        cv::Ptr<cv::freetype::FreeType2> ft2;
+
+        // support multi channels
+        std::map<int, std::vector<vp_objects::vp_point>> all_jam_regions;   // channel -> jam region
+        std::map<int, bool> all_jam_results;  // channel -> jam status
+        std::map<int, std::vector<int>> all_involve_ids;  // channel -> target ids when enter jam status
+    protected:
+        virtual std::shared_ptr<vp_objects::vp_meta> handle_frame_meta(std::shared_ptr<vp_objects::vp_frame_meta> meta) override;
+    public:
+        vp_ba_jam_osd_node(std::string node_name,  std::string font = "");
+        ~vp_ba_jam_osd_node();
+    };
+}