Manpages - XvQueryExtension.3

XvQueryExtension - return version and release of extension

#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);

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

*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.

[Success]

Returned if *XvQueryExtension*(3) completed successfully.

[XvBadExtension]

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

*Xv*(3)