XvQueryExtension

Section: libXv Functions (3)
Updated: libXv 1.0.11
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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.