add person gathering

wangrong

2025-01-18 8b0e31121a9a29b92a41fc575138a2e9b4c12d8e

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#include "../nodes/vp_file_src_node.h" 
#include "../nodes/infers/vp_yunet_face_detector_node.h" 
#include "../nodes/osd/vp_face_osd_node.h" 
#include "../nodes/vp_app_des_node.h" 
 
#include "../utils/analysis_board/vp_analysis_board.h" 
 
/* 
* ## app_des_sample ## 
* 1. reading video from file 
* 2. detect faces and draw results 
* 3. display on screen in host code using cv::imshow(...) 
* using vp_app_des_node INSTEAD OF vp_screen_des_node for displaying. 
*/ 
 
int main() { 
    VP_SET_LOG_LEVEL(vp_utils::vp_log_level::INFO); 
    VP_LOGGER_INIT(); 
 
    // create nodes 
    auto file_src_0 = std::make_shared<vp_nodes::vp_file_src_node>("file_src_0", 0, "./vp_data/test_video/face.mp4"); 
    auto yunet_face_detector_0 = std::make_shared<vp_nodes::vp_yunet_face_detector_node>("yunet_face_detector_0", "./vp_data/models/face/face_detection_yunet_2022mar.onnx"); 
    auto osd_0 = std::make_shared<vp_nodes::vp_face_osd_node>("osd_0"); 
    auto app_des_0 = std::make_shared<vp_nodes::vp_app_des_node>("app_des_0", 0); 
 
    // register callback to display result 
    std::string ori_win_title = "original frame using cv::imshow(...)"; 
    std::string osd_win_title = "osd frame using cv::imshow(...)"; 
    cv::namedWindow(ori_win_title,cv::WindowFlags::WINDOW_NORMAL); 
    cv::namedWindow(osd_win_title,cv::WindowFlags::WINDOW_NORMAL); 
    app_des_0->set_app_des_result_hooker([&](std::string node_name, std::shared_ptr<vp_objects::vp_meta> meta) { 
        // only deal with frame meta 
        if (meta->meta_type == vp_objects::vp_meta_type::FRAME) { 
            auto frame_meta = std::dynamic_pointer_cast<vp_objects::vp_frame_meta>(meta); 
            cv::imshow(ori_win_title, frame_meta->frame); 
 
            // osd frame may be empty 
            if (!frame_meta->osd_frame.empty()) { 
                cv::imshow(osd_win_title, frame_meta->osd_frame); 
            } 
        } 
    }); 
 
    // construct pipeline 
    yunet_face_detector_0->attach_to({file_src_0}); 
    osd_0->attach_to({yunet_face_detector_0}); 
    app_des_0->attach_to({osd_0}); 
 
    // start pipeline 
    file_src_0->start(); 
 
    // for debug purpose 
    vp_utils::vp_analysis_board board({file_src_0}); 
    board.display(); 
}