code: def _parse_jp2_header(fp):
      """Parse the JP2 header box to extract size, component count and
      color space information, returning a (size, mode, mimetype) tuple.
      """
  
      # Find the JP2 header box
      header = None
      mimetype = None
      while True:
          lbox, tbox = struct.unpack(">I4s", fp.read(8))
          if lbox == 1:
              lbox = struct.unpack(">Q", fp.read(8))[0]
              hlen = 16
          else:
              hlen = 8
  
          if lbox < hlen:
              raise SyntaxError("Invalid JP2 header length")
  
          if tbox == b"jp2h":
              header = fp.read(lbox - hlen)
              break
          elif tbox == b"ftyp":
              if fp.read(4) == b"jpx ":
                  mimetype = "image/jpx"
              fp.seek(lbox - hlen - 4, os.SEEK_CUR)
          else:
              fp.seek(lbox - hlen, os.SEEK_CUR)
  
      if header is None:
          raise SyntaxError("could not find JP2 header")
  
      size = None
      mode = None
      bpc = None
      nc = None
  
      hio = io.BytesIO(header)
      while True:
          lbox, tbox = struct.unpack(">I4s", hio.read(8))
          if lbox == 1:
              lbox = struct.unpack(">Q", hio.read(8))[0]
              hlen = 16
          else:
              hlen = 8
  
          content = hio.read(lbox - hlen)
  
          if tbox == b"ihdr":
              height, width, nc, bpc, c, unkc, ipr = struct.unpack(
                  ">IIHBBBB", content
              )
              size = (width, height)
              if unkc:
                  if nc == 1 and (bpc & 0x7F) > 8:
                      mode = "I;16"
                  elif nc == 1:
                      mode = "L"
                  elif nc == 2:
                      mode = "LA"
                  elif nc == 3:
                      mode = "RGB"
                  elif nc == 4:
                      mode = "RGBA"
                  break
          elif tbox == b"colr":
              meth, prec, approx = struct.unpack_from(">BBB", content)
              if meth == 1:
                  cs = struct.unpack_from(">I", content, 3)[0]
                  if cs == 16:  # sRGB
                      if nc == 1 and (bpc & 0x7F) > 8:
                          mode = "I;16"
                      elif nc == 1:
                          mode = "L"
                      elif nc == 3:
                          mode = "RGB"
                      elif nc == 4:
                          mode = "RGBA"
                      break
                  elif cs == 17:  # grayscale
                      if nc == 1 and (bpc & 0x7F) > 8:
                          mode = "I;16"
                      elif nc == 1:
                          mode = "L"
                      elif nc == 2:
                          mode = "LA"
                      break
                  elif cs == 18:  # sYCC
                      if nc == 3:
                          mode = "RGB"
                      elif nc == 4:
                          mode = "RGBA"
                      break
  
      if size is None or mode is None:
          raise SyntaxError("Malformed jp2 header")
  
      return (size, mode, mimetype)
  
file_path: catboost/contrib/python/Pillow/py2/PIL/Jpeg2KImagePlugin.py
imports: import io
  import os
  import struct
  from .None import Image, ImageFile
label_desc: Use image node_id 2 for calling a global function with example usage: _parse_jp2_header(fp) and returns: size,  mode,  mimetype