xvgrabport(3x) [xfree86 man page]

XvGrabPort(3X)															    XvGrabPort(3X)

Name
       XvGrabPort - lock port for exclusive use by client

Syntax
       #include <X11/extensions/Xvlib.h>

       XvGrabPort(dpy, port, time)

       Display *dpy;
       XvPortID port;
       Time time;

Arguments
       dpy     Specifies the display screen on which the Xv Server is to accept requests from Xv clients.  If the display option is not specified,
	       Xv uses the display screen specified by your DISPLAY environment variable.  The display	option	has  the  format  hostname:number.
	       Using two colons (::) instead of one (:) indicates that DECnet is to be used for transport.

       port    Defines the port to be grabbed.

       time    Specifies the request timestamp.

Description
       XvGrabPort(3X) 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 XvInvalidTime 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  fol-
       lowing requests are processed: XvGrabPort(3X), XvUngrabPort(3X), XvPutVideo(3X), XvPutStill(3X), XvGetVideo(3X), XvGetStill(3X).

       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 Values
       [Success]
	       Returned if XvGrabPort(3X) completed successfully.

       [XvInvalidTime]
	       Returned if requested time is older than the current port time.

       [XvAlreadyGrabbed]
	       Returned if the port is already grabbed by another client.

       [XvBadExtension]
	       Returned if the Xv extension is unavailable.

       [XvBadAlloc]
	       Returned if XvGrabPort(3X) failed to allocate memory to process the request.

Diagnostics
       [XvBadPort]    Generated if the requested port does not exist.

See Also
       XvUngrabPort(3X) XvVideoNotify(3X)

XFree86 							   Version 4.7.0						    XvGrabPort(3X)

XvPutStill(3X)															    XvPutStill(3X)

Name
       XvPutStill - write a single frame of video to a drawable

Syntax
       #include <X11/extensions/Xvlib.h>

       XvPutStill(dpy, port, d, gc, vx, vy, vw, vh, dx, dy, dw, dh)

       Display *dpy;
       XvPortID port;
       Drawable d;
       GC gc;
       int vx, vy, dx, dy;
       unsigned int vw, vh;
       unsigned int dw, dh;

Arguments
       dpy	      Specifies  the  display  screen  on which the Xv Server is to accept requests from Xv clients.  If the display option is not
		      specified, Xv uses the display screen specified by your DISPLAY environment variable.  The display  option  has  the  format
		      hostname:number.	Using two colons (::) instead of one (:) indicates that DECnet is to be used for transport.

       port	      Defines the port from which to get the still.

       d	      Defines the drawable into which the still is to be written.  Pixmaps are currently not supported.

       gc	      Defines the graphical context.  GC components are: subwindow-mode, clip-x-origin, clip-y-origin, and clip-mask.

       vx,vy,vw,vh    Define the location and size of the video region to be written.  vx and vy define the upper-left pixel of the region. vw and
		      vh define the width and height, in pixels, of the region.

       dx,dy,dw,dh    Define the location and size of the destination region into which the still image is written.  dx and dy define  the  upper-
		      left corner of the region. dw and dh define the width and height, in pixels, of the region.

Description
       XvPutStill(3X) writes a single frame of video to a drawable.  The position and size of the source (video) rectangle is specified by vx, vy,
       vw, and vh.  The position and size of the destination (drawable) rectangle is specified by dx, dy, dw, and dh.

       Video data is clipped to the bounds of the video encoding, scaled to the requested drawable region size (or the closest size supported) and
       clipped to the bounds of the drawable.

       If the port is grabbed by another client, this request is ignored, and an XvVideoNotify event with detail XvBusy is generated for the draw-
       able.  If the port is not receiving a valid video signal a VideoNotify event with detail XvHardError is generated for the drawable.

Returned Values
       [Success]
	       Returned if XvPutStill(3X) completed successfully.

       [XvBadExtension]
	       Returned if the Xv extension is unavailable.

       [XvBadAlloc]
	       Returned if XvGetStill(3X) failed to allocate memory to process the request.

Diagnostics
       [XvBadPort]
	       Generated if the requested port does not exist.

       [BadDrawable]
	       Generated if the requested drawable does not exist.

       [BadGC] Generated if the requested graphics context does not exist.

       [BadAlloc]
	       Generated if there were insufficient resources to process the request.

See Also
       XvPutVideo(3X), XvGetStill(3X), XvVideoNotify(3X)

XFree86 						       Version Version 4.3.0						    XvPutStill(3X)