X11R7.4 - man page for xvquerybestsize (x11r4 section 3)
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XvQueryBestSize - determine the optimum drawable region size
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 desired.
p_dw,p_dh Pointers to where the closest destination sizes supported by the server are
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 1.0.4 XvQueryBestSize(3)
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