v4l2_add_ctrl_range  599 modules/videoio/src/cap_libv4l.cpp         v4l2_add_ctrl_range(capture, &c);
v4l2_add_ctrl_range  621 modules/videoio/src/cap_libv4l.cpp           v4l2_add_ctrl_range(capture, &c);
v4l2_add_ctrl_range  644 modules/videoio/src/cap_libv4l.cpp           v4l2_add_ctrl_range(capture, &c);