redhat man page for xvqueryextension

XvQueryExtension(3X)													      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 successfully.

       [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 Version 4.3.0					      XvQueryExtension(3X)