XvQueryExtension(3X)XvQueryExtension(3X)NameXvQueryExtension - return version and release of extension
Syntax
#include <X11/extensions/Xvlib.h>
XvQueryExtension(p_version, p_release,
p_request_base, p_event_base, p_error_base)
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
DescriptionXvQueryExtension(3X) returns the version and release num-
bers 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]
Returns True if XvQueryExtension(3X) completed
successfully.
[XvBadExtension]
Returned if the Xv video extension is not avail-
able for the named display.
[XvBadAlloc]
Returned if XvQueryExtension(3X) failed to allo-
cate memory to process the request.
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