AuMakeChangeStateAction(3) manual page

Table of Contents

## 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

Table of Contents

- Name
- Synopsis
- Arguments
- Description
- See Also