DragonFly On-Line Manual Pages

AuMakeChangeStateAction(3)                  DragonFly Library Functions Manual

Name
       AuMakeChangeStateAction - initialize an action

Synopsis
       #include <audio/audiolib.h>

       AuMakeChangeStateAction(action, trigger_state, trigger_prev_state,
       trigger_reason, flow, element_num, new_state)
           AuElementAction action; /* RETURN */
           unsigned char trigger_state;
           unsigned char trigger_prev_state;
           unsigned char trigger_reason;
           AuFlowID flow;
           unsigned char element_num;
           unsigned char new_state;

Arguments
       action    Returns the initialized action.

       trigger_state
                 Specifies the state that triggers the action.  This must be
                 one of these constants: AuStateStop, AuStateStart,
                 AuStatePause, or AuStateAny.

       trigger_prev_state
                 Specifies the previous state for the trigger.  This must be
                 one of these 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.

       flow      Specifies the ID of the flow to affect.

       element_num
                 Specifies the index of the element to affect.

       new_state Specifies the new state for the flow.  This must be one of
                 thses constants: AuStateStop, AuStateStart, or AuStatePause.

Description
       AuMakeChangeStateAction sets the action field of action to
       AuElementActionChangeState and initializes the other fields with the
       remaining arguments.

       AuMakeChangeStateAction is implemented as a macro.

See Also
       AuMakeSendNotifyAction, AuMakeNoopAction.

       audiolib - Network Audio System C Language Interface

audiolib - action initialization     1.9.4          AuMakeChangeStateAction(3)