virtual void reset_write_sources (bool, bool force = false) = 0;
virtual float playback_buffer_load () const = 0;
virtual float capture_buffer_load () const = 0;
virtual int do_refill () = 0;
virtual int do_flush (RunContext, bool force = false) = 0;
virtual void reset_write_sources (bool, bool force = false) = 0;
virtual float playback_buffer_load () const = 0;
virtual float capture_buffer_load () const = 0;
virtual int do_refill () = 0;
virtual int do_flush (RunContext, bool force = false) = 0;