@Override
protected void setup() {
// open camera and set resolution
cam = new VideoCapture();
cam.open(camId);
cam.set(Videoio.CV_CAP_PROP_FRAME_WIDTH, camWidth);
cam.set(Videoio.CV_CAP_PROP_FRAME_HEIGHT, camHeight);
// check if camera is open
if (!cam.isOpened()) {
throw new IllegalStateException("Couldn't open cam: " + camId);
}
}
@Override
protected void task() {
if (count++ > 100) {
System.gc();
count = 0;
}
Mat buffer = new Mat();
// grab a frame
cam.grab();
// save the grabbed frame in the buffer
cam.retrieve(buffer);
frame = buffer;
// take a time stamp for latency measurement
timeStamp = System.nanoTime();
}
@Override
protected void shutdown() {
System.out.println("Shutdown cam " + camId);
cam.release();
while (cam.isOpened()) {}
}