X11R7.4 - man page for xvgrabport (x11r4 section 3)
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XvGrabPort - lock port for exclusive use by client
XvGrabPort(Display *dpy, XvPortID port, Time time);
dpy Specifies the connection to the X server.
port Defines the port to be grabbed.
time Specifies the request timestamp.
XvGrabPort(3) grabs a port. Once a client grabs a port, only that client can make video
requests to that port.
If the time is before the current port time, the XvGrabPort request is ignored and XvIn-
validTime is returned. If the port is already grabbed by another client, XvAlreadyGrabbed
is returned. Otherwise it returns a status of Success. The port time is updated when the
following requests are processed: XvGrabPort(3), XvUngrabPort(3), XvPutVideo(3), XvPut-
Still(3), XvGetVideo(3), XvGetStill(3).
If the port is actively processing video for another client, the video is preempted, and
an XvVideoNotify event with detail XvPreempted is generated for its drawable.
Returned if XvGrabPort(3) completed successfully.
Returned if requested time is older than the current port time.
Returned if the port is already grabbed by another client.
Returned if the Xv extension is unavailable.
Returned if XvGrabPort(3) failed to allocate memory to process the request.
[XvBadPort] Generated if the requested port does not exist.
X Version 11 libXv 1.0.4 XvGrabPort(3)
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