virtual void StopStreamDevice(const StreamDeviceInfo& device_info) OVERRIDE;
virtual bool IsStream(const std::string& label) OVERRIDE;
virtual int video_session_id(const std::string& label, int index) OVERRIDE;
virtual void StopStreamDevice(const StreamDeviceInfo& device_info) OVERRIDE;
virtual bool IsStream(const std::string& label) OVERRIDE;
virtual int video_session_id(const std::string& label, int index) OVERRIDE;