code: def scale_down(src_size, size):
      """Scale down crop size if it's bigger than image size"""
      w, h = size
      sw, sh = src_size
      if sh < h:
          w, h = float(w * sh) / h, sh
      if sw < w:
          w, h = sw, float(h * sw) / w
      return int(w), int(h)
  
file_path: mxnet/plugin/opencv/opencv.py
imports: import random
  import ctypes
  import cv2
  import mxnet
  from mxnet.base import _LIB
  from mxnet.base import mx_uint, NDArrayHandle, check_call
label_desc: Use image node_id 4 for calling a global function with example usage: scale_down(src_size, size) and returns: int,  int