code: def get_encoding(ext, dtype):
      exts = {
          "mp3",
          "flac",
          "vorbis",
      }
      encodings = {
          "float32": "PCM_F",
          "int32": "PCM_S",
          "int16": "PCM_S",
          "uint8": "PCM_U",
      }
      return ext.upper() if ext in exts else encodings[dtype]
  
label_desc: Use image node_id 1 for calling a global function with example usage: get_encoding(ext, dtype) and returns: unknown