AuMakeChangeStateAction(3)AuMakeChangeStateAction(3)NameAuMakeChangeStateAction - 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, AuS‐
tatePause, or AuStateAny.
trigger_prev_state
Specifies the previous state for the trigger. This must be
one of these constants: AuStateStop, AuStateStart, AuS‐
tatePause, or AuStateAny.
trigger_reason
Specifies the reason for the action. This must be one of
these constants: AuReasonUser, AuReasonUnderrun, AuRea‐
sonOverrun, 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.
DescriptionAuMakeChangeStateAction sets the action field of action to AuElementAc‐
tionChangeState 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)
