X11R7.4 - man page for xvqueryextension (x11r4 section 3)
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XvQueryExtension - return version and release of extension
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
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.
Returned if XvQueryExtension(3) completed successfully.
Returned if the Xv video extension is not available for the named display.
Returned if XvQueryExtension(3) failed to allocate memory to process the request.
X Version 11 libXv 1.0.4 XvQueryExtension(3)
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