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XvQueryExtension - return version and release of extension
#include
<X11/extensions/Xvlib.h>
XvQueryExtension(dpy, p_version, p_release,
p_request_base, p_event_base, p_error_base)
Display *dpy;
unsigned int *p_version, *p_release;
unsigned int *p_request_base, *p_event_base, *p_error_base;
- 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
XvQueryExtension(3X)
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(3X)
completed successfully.
- [XvBadExtension]
- Returned if the Xv video extension is not available for
the named display.
- [XvBadAlloc]
- Returned if XvQueryExtension(3X)
failed
to allocate memory to process the request.
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