Method _LoadTrackedData

src/CVTracker.cpp:450–491

Load protobuf data file

// Load protobuf data file
bool CVTracker::_LoadTrackedData(){
    using std::ios;

    // Create tracker message
    pb_tracker::Tracker trackerMessage;

    {
        // Read the existing tracker message.
        std::fstream input(protobuf_data_path, ios::in | ios::binary);
        if (!trackerMessage.ParseFromIstream(&input)) {
            std::cerr << "Failed to parse protobuf message." << std::endl;
            return false;
        }
    }

    // Make sure the trackedData is empty
    trackedDataById.clear();

    // Iterate over all frames of the saved message
    for (size_t i = 0; i < trackerMessage.frame_size(); i++) {
        const pb_tracker::Frame& pbFrameData = trackerMessage.frame(i);

        // Load frame and rotation data
        size_t id = pbFrameData.id();
        float rotation = pbFrameData.rotation();

        // Load bounding box data
        const pb_tracker::Frame::Box& box = pbFrameData.bounding_box();
        float x1 = box.x1();
        float y1 = box.y1();
        float x2 = box.x2();
        float y2 = box.y2();

        // Assign data to tracker map
        trackedDataById[id] = FrameData(id, rotation, x1, y1, x2, y2);
    }

    // Delete all global objects allocated by libprotobuf.
    google::protobuf::ShutdownProtobufLibrary();

    return true;
}