AuElementNotifyEvent(3) 				     Library Functions Manual					   AuElementNotifyEvent(3)

Name
       AuElementNotifyEvent - element notify event structure

Structures
       #include <audio/audiolib.h>

       typedef union _AuEvent
       {
	   . . .
	   AuElementNotifyEvent auelementnotify;
	   . . .
       }AuEvent;

       typedef struct _AuElementNotifyEvent
       {
	   int type;
	   AuUint32 serial;
	   AuBool send_event;
	   AuServer *server;
	   AuTime time;
	   AuFlowID flow;
	   unsigned char element_num;
	   unsigned char kind;
	   unsigned char prev_state;
	   unsigned char cur_state;
	   unsigned char reason;
	   AuUint32 num_bytes;
       }AuElementNotifyEvent;

Members
       type	 The event type.  ElementNotify events are type AuEventTypeElementNotify.

       serial	 The serial ID of the event expanded from the 16 bit value sent by the server.

       send_event
		 AuTrue if the event came from a SendEvent protocol request.

       server	 The connection to the audio server that the event was read from.

       time	 The server time in milliseconds when the event was generated.

       flow	 The ID of the flow that caused the event.

       element_num
		 The index of the element that caused the event or AuElementAll to indicate the flow.

       kind	 The  kind  of	notify	event.	This will be one of these constants: AuElementNotifyKindLowWater, AuElementNotifyKindHighWater, or
		 AuElementNotifyKindState.

       prev_state
		 The previous state of the element indexed by element_num.  This will be one of these  constants:  AuStateStop,  AuStateStart,	or
		 AuStatePause.

       cur_state The current state of the element indexed by element_num.  This will be one of these constants: AuStateStop, AuStateStart, or AuS-
		 tatePause.

       reason	 The reason for the notify event.  This will be one of these constants: AuReasonUser, AuReasonUnderrun, AuReasonOverrun,  AuReaso-
		 nEOF, AuReasonWatermark, or AuReasonHardware.

       num_bytes The number of bytes to send or receive.  Only valid if the the element indexed by element_num is an ImportClient or ExportClient.

Description
       ElementNotify  events  are  sent to client applications to notify them of a watermark condition or state change.  If kind is AuElementNoti-
       fyKindLowWater, the ImportClient element indexed by element_num in flow is ready to receive num_bytes of audio data from the client  appli-
       cation.	 If  kind  is  AuElementNotifyKindHighWater, the ExportClient element indexed by element_num in flow is ready to send num_bytes of
       audio data to the client application.  If kind is AuElementNotifyKindState, the element indexed by element_num (or flow if  element_num	is
       AuElementAll) has made a state transition from prev_state to cur_state triggering the event.  Reguardless of kind, prev_state and cur_state
       contain the old and new states and reason contains the reason for the event.

See Also
       AuAnyEvent, AuErrorEvent, AuGrabNotifyEvent, AuMakeSendNotifyAction, AuMonitorNotifyEvent.

       audiolib - Network Audio System C Language Interface

audiolib - events						       1.9.3						   AuElementNotifyEvent(3)