code: def get_decoder(encoding, *args, **kwargs):
      
      def _get_decoder_class():
          if encoding == AMF0:
              try:
                  from cpyamf import amf0
              except ImportError:
                  from pyamf import amf0
  
              return amf0.Decoder
          elif encoding == AMF3:
              try:
                  from cpyamf import amf3
              except ImportError:
                  from pyamf import amf3
  
              return amf3.Decoder
  
          raise ValueError("Unknown encoding %r" % (encoding,))
  
      return _get_decoder_class()(*args, **kwargs)
docs: Returns a L{codec.Decoder} capable of decoding AMF[C{encoding}] streams.
  
      @raise ValueError: Unknown C{encoding}.