XvQueryExtension(3X)UNIX Programmer's Manual XvQueryExtension(3X)
Name
XvQueryExtension - return version and release of extension
Syntax
#include <X11/extensions/Xvlib.h>
XvQueryExtension(dpy, p_version, p_release,
p_request_base, p_event_base, p_error_base)
Display *dpy;
unsigned int *p_version, *p_release;
unsigned int *p_request_base, *p_event_base, *p_error_base;
Arguments
p_version Pointer to where the current version number
of the Xv video extension is written.
p_release Pointer to where the release number of the Xv
video extension is written.
p_request_base Pointer to where the extension major request
number is returned
p_event_base Pointer to where the extension event base is
returned
p_error_base Pointer to where the extension error base is
returned
Description
XvQueryExtension(3X) returns the version and release numbers
for the Xv video extension currently loaded on the system.
The extension major request number, event base, and error
base are also returned.
Returned Values
[Success]
Returned if XvQueryExtension(3X) completed success-
fully.
[XvBadExtension]
Returned if the Xv video extension is not available
for the named display.
[XvBadAlloc]
Returned if XvQueryExtension(3X) failed to allocate
memory to process the request.
XFree86 Version 4.5.0 1