scenic

    public:

        Decoder();

        virtual ~Decoder();

        /// Abstract Factory method that will create depayloaders corresponding to this Decoder's codec type 

        virtual RtpPay* createDepayloader() const = 0;

        virtual void adjustJitterBuffer() {}; // buy default, do nothing

        _GstElement *sinkElement() { return decoder_; }

};

class VideoEncoder : public Encoder 

{

class VorbisDecoder : public Decoder

{

    public: 

        bool adjustsBufferTime() { return true; }

        unsigned long long minimumBufferTime();

    private: 

        RtpPay* createDepayloader() const;

        static const unsigned long long MIN_BUFFER_USEC = 100000;

};

/// Encoder that simply performs datatype conversion on raw audio.

{

    public:

        RawEncoder();

        _GstElement *srcElement() { return aconv_; }

    private:

        Pay* createPayloader() const;

};

/// Decoder that simply performs datatype conversion on raw audio.

{

    public:

        RawDecoder();

    private:

        RtpPay* createDepayloader() const;

        _GstElement *sinkElement() { return aconv_; }

};

/// Encoder that encodes raw audio to mpeg.

{

    public:

        LameEncoder();

        ~LameEncoder();

    private:

        _GstElement *mp3parse_;

        Pay* createPayloader() const;

        _GstElement *srcElement() { return mp3parse_; }

        ///No Copy Constructor

/// Decoder that decodes mpeg to raw audio.

{

    public:

        MadDecoder();

    private:

        void init();

        RtpPay* createDepayloader() const;

};