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AuMakeNoopAction - initialize an action 
#include
<audio/audiolib.h> 
AuMakeNoopAction(action, trigger_state, trigger_prev_state,
trigger_reason) 
    AuElementAction action; /* RETURN */
 
    unsigned char trigger_state;
 
    unsigned char trigger_prev_state;
 
    unsigned char trigger_reason;
 
- action
- Returns the initialized action. 
- trigger_state
- Specifies the
state that triggers the action. This must be one of thses constants: AuStateStop,
AuStateStart, AuStatePause, or AuStateAny. 
- trigger_prev_state
- Specifies the
previous state for the trigger. This must be one of thses constants: AuStateStop,
AuStateStart, AuStatePause, or AuStateAny. 
- trigger_reason
- Specifies the reason
for the action. This must be one of these constants: AuReasonUser, AuReasonUnderrun,
AuReasonOverrun, AuReasonEOF, AuReasonWatermark, AuReasonHardware, or AuReasonAny.
AuMakeNoopAction sets the action field of action to AuElementActionNoop
and initializes the other fields with the remaining arguments.
AuMakeNoopAction
is implemented as a macro. 
AuMakeChangeStateAction, AuMakeSendNotifyAction.
audiolib - Network Audio System C Language Interface 
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