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XvQueryExtension - return version and release of extension
#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;
- 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]
- Returns True
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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