NAME

       XvQueryExtension - return version and release of extension

SYNOPSIS

       #include <X11/extensions/Xvlib.h>

       int XvQueryExtension(Display *dpy, unsigned int *p_version,
                           unsigned int *p_revision,
                           unsigned int *p_request_base,
                           unsigned int *p_event_base,
                           unsigned int *p_error_base);

ARGUMENTS

       dpy            Specifies the connection to the X server.

       p_version      Pointer  to  where  the current version number of the Xv video extension is
                      written.

       p_revision     Pointer to where the revision 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(3) 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.

RETURN VALUES

       [Success]
               Returned if XvQueryExtension(3) completed successfully.

       [XvBadExtension]
               Returned if the Xv video extension is not available for the named display.

SEE ALSO

       Xv(3)