XvPortNotify3

#include <X11/extensions/Xvlib.h>

     typedef union {
       int type;
       XvVideoNotifyEvent xvvideo;
       XvPortNotifyEvent xvport;
       long pad[24];
     } XvEvent;
     typedef struct {
       int type;
       unsigned long serial;
       Bool send_event;
       Display *display;
       XvPortID port_id;
       Time time;
       Atom attribute;
       long value;
     } XvPortNotifyEvent;

type

Specifies the type of event: XvPortNotify.

serial

Number of the last request processed by the server.

send_event

True if the event was generated by a SendEvent request.

display

A pointer to the display the event was read from.

port_id

The port whose attribute has changed.

attribute

An atom specifying the attribute that changed.

value

The new value of the attribute.