xvselectportnotify(3x) [xfree86 man page]

XvSelectPortNotify(3X)													    XvSelectPortNotify(3X)

Name
       XvSelectPortNotify - enable or disable XvPortNotify(3X) events

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

       XvSelectPortNotify(dpy, port, onoff)

       Display *dpy;
       XvPortID port;
       Bool onoff;

Arguments
       dpy     Specifies the display screen on which the X Server is to accept requests from X clients.  If the display option is not specified, X
	       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    Specifies the port for which PortNotify events are to be generated when its attributes are changed using XvSetPortAttribute(3X).

       onoff   Specifies whether notification is to be enabled or disabled.

Description
       XvSelectPortNotify(3X)  enables or disables PortNotify event delivery to the requesting client.	XvPortNotify(3X) events are generated when
       port attributes are changed using XvSetPortAttribute(3X).

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

       [XvBadExtension]
	       Returned if the Xv extension is unavailable.

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

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

See Also
       XvSetPortNotify(3X), XvSetPortAttribute(3X), XvPortNotify(3X)

XFree86 							   Version 4.7.0					    XvSelectPortNotify(3X)

XvSetPortAttribute(3X)													    XvSetPortAttribute(3X)

Name
       XvSetPortAttribute - sets an attribute of a video port

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

       XvSetPortAttribute(dpy, port, attribute, value)

       Display *dpy;
       XvPortID port;
       Atom attribute;
       int value;

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	      Specifies the port for which the attribute is to be used.

       attribute      Identifies the port attribute to be set by this request.	Can be one of the table entries under the column "String," below.

       value	      Identifies the value to which attribute is to be set.  Can be one of the table entries under the column "Type," below.

Description
       XvSetPortAttribute(3X) permits a client to set the port attribute to specified values.  This request supports the following values:

       Attribute String        Type		Default

       "XV_ENCODING"	       XvEncodingID	Server dependent
       "XV_HUE" 	       [-1000...1000]	0
       "XV_SATURATION"	       [-1000...1000]	0
       "XV_BRIGHTNESS"	       [-1000...1000]	0
       "XV_CONTRAST"	       [-1000...1000]	0

       The supplied encoding must be one of the encodings listed for the adaptor, otherwise an Encoding error results.

       If  the	adaptor  does  not  support  the exact hue, saturation, brightness, and contrast levels supplied, the closest levels supported are
       assumed.  Use XvGetPortAttribute(3X) to query the resulting levels.

       When an XvSetPortAttribute(3X) request is processed, a PortControlNotify(3X) event is generated for all clients	that  have  requested  for
       port changes using XvSelectPortNotify(3X).

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

       [XvBadExtension]
	       Returned if the Xv extension is unavailable.

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

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

       [XvBadEncoding]
	       Generated if an encoding is specified that does not exist.

       [BadMatch]
	       Generated if the requested attribute atom does not specify an attribute supported by the adaptor.

See Also
       XvGetPortAttribute(3X), XvSelectPortNotify(3X), XvPortNotify(3X)

XFree86 						       Version Version 4.3.0					    XvSetPortAttribute(3X)