rem: virtual std::string description(void) const { return("Interface for ogg decoders and encoders that support i/o using standard streams."); }
add: virtual std::string description(void) const { return("Interface for Ogg Vorbis decoders and encoders using UNIX pipe i/o."); }
context:   virtual std::string description(void) const { return("Interface for ogg decoders and encoders that support i/o using standard streams."); }