first commit

samples/app_src_sample.cpp

@@ -0,0 +1,80 @@
+#include "../nodes/vp_app_src_node.h"
+#include "../nodes/infers/vp_ppocr_text_detector_node.h"
+#include "../nodes/osd/vp_text_osd_node.h"
+#include "../nodes/vp_screen_des_node.h"
+#include "../utils/analysis_board/vp_analysis_board.h"
+
+/*
+* ## app src sample ##
+* receive frames(cv::Mat) from host code
+*/
+
+int main() {
+    VP_SET_LOG_LEVEL(vp_utils::vp_log_level::INFO);
+    VP_LOGGER_INIT();
+
+    // create nodes
+    auto app_src_0 = std::make_shared<vp_nodes::vp_app_src_node>("app_src_0", 0);
+    auto ppocr_text_detector = std::make_shared<vp_nodes::vp_ppocr_text_detector_node>("ppocr_text_detector", 
+                                "./vp_data/models/text/ppocr/ch_PP-OCRv3_det_infer",
+                                "./vp_data/models/text/ppocr/ch_ppocr_mobile_v2.0_cls_infer",
+                                "./vp_data/models/text/ppocr/ch_PP-OCRv3_rec_infer",
+                                "./vp_data/models/text/ppocr/ppocr_keys_v1.txt");
+    auto osd_0 = std::make_shared<vp_nodes::vp_text_osd_node>("osd_0", "./vp_data/font/NotoSansCJKsc-Medium.otf");
+    auto screen_des_0 = std::make_shared<vp_nodes::vp_screen_des_node>("screen_des_0", 0);
+
+    // construct pipeline
+    ppocr_text_detector->attach_to({app_src_0});
+    osd_0->attach_to({ppocr_text_detector});
+    screen_des_0->attach_to({osd_0});
+
+    // start pipeline
+    app_src_0->start();
+
+    // visualize pipeline for debug
+    vp_utils::vp_analysis_board board({app_src_0});
+    board.display(1, false); // no block since we need interactions from console later
+
+    // simulate push frame to pipeline regularly in a separate thread
+    bool exit = false;
+    auto simulate_run = [&]() {
+        auto index = 0;
+        auto count = 0;
+        auto path = "./vp_data/test_images/text/";
+        while (!exit) {
+            auto frame = cv::imread(path + std::to_string(index) + ".jpg");
+            assert(!frame.empty());
+            
+            app_src_0->push_frames({frame});  // push frame to pipeline, return false means failed
+            count++;
+            std::cout << "main thread has pushed [" << count << "] frames into pipeline..." << std::endl;
+            
+            index++;
+            index = index % 3;
+            std::this_thread::sleep_for(std::chrono::milliseconds(2000));  // sleep for 2 seconds
+        }
+    };
+    std::thread simulate_thread(simulate_run);
+
+    /* interact from console, start or stop the pipeline */
+    /* no except check */
+    std::string input;
+    std::getline(std::cin, input);
+    while (input != "quit") {
+        if (input == "start") {
+            app_src_0->start();
+        }
+        else if (input == "stop") {
+            app_src_0->stop();  // app_src_0->push_frames(...) will print Warn message since it has stopped working
+        }
+        else {
+            std::cout << "invalid command!" << std::endl;
+        }
+        std::getline(std::cin, input);
+    }
+
+    std::cout << "app_src_sample sample exits..." << std::endl;
+    exit = true;
+    simulate_thread.join();
+    app_src_0->detach_recursively();
+}