XvQueryBestSize(3x)XvQueryBestSize(3x)NameXvQueryBestSize - determine the optimum drawable region size
Syntax
#include <X11/extensions/Xvlib.h>
XvQueryBestSize(dpy, port, motion, vw, vh, dw, dh, p_dw, p_dh)
Display *dpy;
XvPortID port;
Bool motion;
unsigned int vw, vh;
unsigned int dw, dh;
unsigned int *p_dw, *p_dh;
Arguments
dpy Specifies the display screen on which the Xv Server is
to accept requests from Xv clients. If the display
option is not specified, Xv uses the display screen
specified by your DISPLAY environment variable. The
display option has the format hostname:number. Using
two colons (::) instead of one (:) indicates that DECnet
is to be used for transport.
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 sup‐
ported by the server are returned.
Description
Some ports may be able to scale incoming or outgoing video.
XvQueryBestSize(3x) 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 Values
[Success]
Returned if XvQueryBestSize(3x) completed successfully.
[XvBadExtension]
Returned if the Xv extension is unavailable.
[XvBadAlloc]
Returned if XvQueryBestSize(3x) failed to allocate memory to
process the request.
Diagnostics
[XvBadPort]
Generated if the requested port does not exist.
X Version 11 libXv 1.0.1 XvQueryBestSize(3x)
