Display *dpy;
XvPortID port;
Atom attribute;
int *p_value;
Arguments
dpy
Specifies the connection to the X server.
port
Specifies the port, associated with the given display, for
which the attribute values are to be returned.
attribute
An atom that identifies the attribute to be queried by this
request. Control atoms are obtained using the XInternAtom
request with a string from the following table.
p_value
Pointer to the location where the attribute value is written on
return.
Description
XvGetPortAttribute(3) returns the current value of the requested
port attribute in the integer pointed to by p_value.
The attribute is identified using an Atom that equates to the attribute name.
The XInternAtom request can be used with one of the strings
below to return a matching Atom.
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
