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AuMakeChangeStateAction - initialize an action
#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;
- 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.
AuMakeChangeStateAction sets the action field of action to AuElementActionChangeState
and initializes the other fields with the remaining arguments.
AuMakeChangeStateAction
is implemented as a macro.
AuMakeSendNotifyAction, AuMakeNoopAction.
audiolib - Network Audio System C Language Interface
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