first commit

nodes/vp_app_src_node.cpp

@@ -0,0 +1,81 @@
+#include "vp_app_src_node.h"
+
+namespace vp_nodes {
+    vp_app_src_node::vp_app_src_node(std::string node_name, 
+                        int channel_index):vp_src_node(node_name, channel_index, 1.0) {
+        this->initialized();
+    }
+
+    vp_app_src_node::~vp_app_src_node() {
+        deinitialized();
+    }
+
+    // host code acts as previous node, call vp_node::meta_flow(...)
+    bool vp_app_src_node::push_frames(std::vector<cv::Mat> frames) {
+        // vp_app_src_node not working
+        if (!gate.is_open()) {
+            VP_WARN(vp_utils::string_format("[%s] is not working!", node_name.c_str()));
+            return false;
+        }
+        
+        if (frames.size() == 0) {
+            return false;
+        }
+
+        // MUST have the same size
+        auto size_warn = [this]() {
+            VP_WARN(vp_utils::string_format("[%s] frames to be pushed MUST have the same size!", this->node_name.c_str()));
+        };
+        auto w = frames[0].cols;
+        auto h = frames[0].rows;
+        for (auto& f: frames) {
+            if (f.cols != w || f.rows != h) {
+                size_warn();
+                return false;
+            }
+        }
+
+        if (original_height != 0 && original_height != h) {
+            size_warn();
+            return false;
+        }
+
+        if (original_width != 0 && original_width != w) {
+            size_warn();
+            return false;
+        }
+
+        // initialize video properties
+        if (original_width == 0 || original_height == 0 || original_fps == 0) {    
+            original_width = w;
+            original_height = h;
+            original_fps = 1;  // set constant value 1 for vp_app_src_node
+        }
+        // stream_info_hooker activated if need
+        vp_stream_info stream_info {channel_index, original_fps, original_width, original_height, to_string()};
+        invoke_stream_info_hooker(node_name, stream_info);
+
+        for (auto& f: frames) {
+            frame_index++;
+            auto frame = f.clone();  // cv::Mat::clone() inside pipeline
+            // create frame meta and meta flow like previous node
+            auto in_meta = std::make_shared<vp_objects::vp_frame_meta>(frame, frame_index, channel_index, original_width, original_height, original_fps);
+
+            vp_node::meta_flow(in_meta);
+        }
+        return true;
+    }
+
+    void vp_app_src_node::handle_run() {
+        // call vp_node::handle_run() since we assume vp_app_src_node has virtual previous node (from host code)
+        vp_node::handle_run();
+    }
+
+    std::shared_ptr<vp_objects::vp_meta> vp_app_src_node::handle_frame_meta(std::shared_ptr<vp_objects::vp_frame_meta> meta) {
+        return vp_node::handle_frame_meta(meta);
+    }
+
+    std::shared_ptr<vp_objects::vp_meta> vp_app_src_node::handle_control_meta(std::shared_ptr<vp_objects::vp_control_meta> meta) {
+        return vp_node::handle_control_meta(meta);
+    }
+}