text: # -*- coding: utf-8 -*-
  from __future__ import unicode_literals
  
  from ...rule import Rule
  
  
  class AudioCodecRule(Rule):
      """Audio Codec rule."""
  
      def execute(self, props, pv_props, context):
          """Execute the rule against properties."""
          if '_codec' in pv_props:
              return pv_props.get('_codec')
  