code: def decoder_pipe_with_name(
      decoder_op, file_root, device, use_fast_idct
  ):
      encoded, _ = fn.readers.file(file_root=file_root)
      decoded = decoder_op(
          encoded,
          device=device,
          output_type=types.RGB,
          use_fast_idct=use_fast_idct,
          seed=42,
      )
      return decoded
  
imports: import glob
  import math
  import numpy
  import nvidia.dali.backend
  import nvidia.dali.fn
  import nvidia.dali.types
  import os
  import random
  from nvidia.dali import pipeline_def
  from nose2.tools import params
  from nose_utils import assert_raises
  from test_utils import check_output_pattern
  from test_utils import compare_pipelines
  from test_utils import get_dali_extra_path
  from test_utils import to_array
label_desc: Use image node_id 20 for calling a global function with example usage: decoder_pipe_with_name(decoder_op, file_root, device, use_fast_idct) and returns: decoded