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Manual Reference Pages  - XvQueryExtension (3X)

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XvQueryExtension - return version and release of extension

CONTENTS

Syntax
Arguments
Description
Returned Values

#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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