XvQueryBestSize(3)              libXv Functions             XvQueryBestSize(3)

       XvQueryBestSize - determine the optimum drawable region size

       #include <X11/extensions/Xvlib.h>

       int XvQueryBestSize(Display *dpy, XvPort port, Bool motion,
                           unsigned int vw, unsigned int vh,
                           unsigned int dw, unsigned int dh,
                           unsigned int *p_dw, unsigned int *p_dh);

       dpy            Specifies the connection to the X server.

       port           Defines the port associated with the display and adaptor
                      for which the optimum size is to be calculated.

       motion         Specifies True if the destination size needs to support
                      full motion, and False if the destination size need only
                      support still images.

       vw,vh          Specifies the size of the source video region desired.

       dw,dh          Specifies the size of the destination drawable region

       p_dw,p_dh      Pointers to where the closest destination sizes
                      supported by the server are returned.

       Some ports may be able to scale incoming or outgoing video.
       XvQueryBestSize(3) returns the size of the closest destination region
       that is supported by the adaptor.  The returned size is guaranteed to
       be smaller than the requested size if a smaller size is supported.

               Returned if XvQueryBestSize(3) completed successfully.

               Returned if the Xv extension is unavailable.

               Returned if XvQueryBestSize(3) failed to allocate memory to
               process the request.

               Generated if the requested port does not exist.

X Version 11                     libXv 1.0.11               XvQueryBestSize(3)