Method GetTrackedObjectValues

src/Timeline.cpp:280–334

Return the trackedObject's properties as a JSON string

#ifdef USE_OPENCV
// Return the trackedObject's properties as a JSON string
std::string Timeline::GetTrackedObjectValues(std::string id, int64_t frame_number) const {

	// Initialize the JSON object
	Json::Value trackedObjectJson;

	// Search for the tracked object on the map
	auto iterator = tracked_objects.find(id);

	if (iterator != tracked_objects.end())
	{
		// Id found, Get the object pointer and cast it as a TrackedObjectBBox
		std::shared_ptr<TrackedObjectBBox> trackedObject = std::static_pointer_cast<TrackedObjectBBox>(iterator->second);

		// Get the trackedObject values for it's first frame
		if (trackedObject->ExactlyContains(frame_number)){
			BBox box = trackedObject->GetBox(frame_number);
			float x1 = box.cx - (box.width/2);
			float y1 = box.cy - (box.height/2);
			float x2 = box.cx + (box.width/2);
			float y2 = box.cy + (box.height/2);
			float rotation = box.angle;

			trackedObjectJson["x1"] = x1;
			trackedObjectJson["y1"] = y1;
			trackedObjectJson["x2"] = x2;
			trackedObjectJson["y2"] = y2;
			trackedObjectJson["rotation"] = rotation;

		} else {
			BBox box = trackedObject->BoxVec.begin()->second;
			float x1 = box.cx - (box.width/2);
			float y1 = box.cy - (box.height/2);
			float x2 = box.cx + (box.width/2);
			float y2 = box.cy + (box.height/2);
			float rotation = box.angle;

			trackedObjectJson["x1"] = x1;
			trackedObjectJson["y1"] = y1;
			trackedObjectJson["x2"] = x2;
			trackedObjectJson["y2"] = y2;
			trackedObjectJson["rotation"] = rotation;
		}

	}
	else {
		// Id not found, return all 0 values
		trackedObjectJson["x1"] = 0;
		trackedObjectJson["y1"] = 0;
		trackedObjectJson["x2"] = 0;
		trackedObjectJson["y2"] = 0;
		trackedObjectJson["rotation"] = 0;
	}

	return trackedObjectJson.toStyledString();
}
#endif

// Add an openshot::Clip to the timeline