code: def decode(self, buffer):
      try:
          self._read_blp_header()
          self._load()
      except struct.error as e:
          msg = "Truncated BLP file"
          raise OSError(msg) from e
      return -1, 0
  
imports: import os
  import struct
  from enum import IntEnum
  from io import BytesIO
  from .None import Image, ImageFile
label_desc: Use image node_id 1 for calling the _BLPBaseDecoder obj's underlying member method code with example usage: obj.decode(buffer) and returns: unknown,  int