first commit

nodes/vp_file_src_node.h

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+#pragma once
+
+#include <string>
+#include <opencv2/core/core.hpp>
+#include <opencv2/imgproc.hpp>
+#include <opencv2/videoio.hpp>
+
+#include "vp_src_node.h"
+
+namespace vp_nodes {
+    // file source node, read video from local file.
+    // example:
+    // ../video/test.mp4
+    class vp_file_src_node: public vp_src_node {
+    private:
+        /* data */
+        std::string gst_template = "filesrc location=%s ! qtdemux ! h264parse ! %s ! videoconvert ! appsink";
+        cv::VideoCapture file_capture;
+    protected:
+        // re-implemetation
+        virtual void handle_run() override;
+    public:
+        vp_file_src_node(std::string node_name, 
+                        int channel_index, 
+                        std::string file_path, 
+                        float resize_ratio = 1.0, 
+                        bool cycle = true,
+                        std::string gst_decoder_name = "avdec_h264",
+                        int skip_interval = 0);
+        ~vp_file_src_node();
+
+        virtual std::string to_string() override;
+        std::string file_path;
+        bool cycle;
+    
+        // set avdec_h264 as the default decoder, we can use hardware decoder instead.
+        std::string gst_decoder_name = "avdec_h264";
+        // 0 means no skip
+        int skip_interval = 0;
+    };
+
+}