set_config
Description:
Set the configuration of the player.
If the player is already configured, and the configuration haven't change, this function will return true. If the player is not in the GST_PLAYER_STATE_STOPPED, this method will return false and active configuration will remain.
config is a Structure that contains the configuration parameters for
       the player.
This function takes ownership of config.
Parameters:
| this | 
           Player instance  | 
      
| config | 
Returns:
| 
           true when the configuration could be set.  |