Audio2.pseudo

Pseudo-code for the Audio2 module (a service that implements a state machine to play audio for player 2)
Data private to the module: MyPriority (number), CurrentState (state), inARMedMode, inPipeOut, inCelebration, Variables for frequencies of each note, Arrays of frequencies and delays of each tune

InitAudio2
Takes a priority number, returns True

Initialize the MyPriority variable with the passed in parameter
Initialize the port line to write to speaker 2
Set CurrentState to Waiting2Play
End of InitAudio2 (return True)

PostAudio2
Takes an event to post, returns True if event was posted
End of PostAudio2

RunAudio2
Implements 2-state state machine for player 2’s audio
The EventType of ThisEvent will be ES_PLAY_TUNE, ES_START_BUTTON_DB_DOWN, ES_PIPE_RECOVERED, ES_TIMEOUT, 
ES_GAINED_POINT, or ES_GAMEOVER; the EventParam will be ARMedMode, 
StartButton, SuccessWrench, SuccessBucket, FailBucket, PipeOut, 
PipeIn, CelebrationMode, FailureMode, PIPE_TIMER, or AUDIO2_TIMER


Local Variables: NextState (state)
Static Local Variable: TuneFreqs (array)
Static Local Variable: TuneDelays (array)
Static Local Variable: NumberOfNotes (number)
Static Local Variable: CurrentNote (number)

Set NextState to CurrentState
Based on the state of the CurrentState variable, choose one of the following blocks of code:
		CurrentState is Waiting2Play
			If ThisEvent is ES_PLAY_TUNE
				Set InARMedMode, inPipeOut, and inCelebration 
to zero
Set TuneFreqs to frequency array corresponding 
to Event Parameter
Set TuneDelays to delay array corresponding to
Event Parameter
				Set NumberOfNotes to the length of TuneFreqs
				Play first note of TuneFreqs
				Set audio timer for length of first note in 
TuneDelays
				Set CurrentNote to 1
				Set NextState to Playing
			Endif
		End Waiting2Play block

		CurrentState is Playing
If (ThisEvent is ES_START_BUTTON_DBDOWN) or (ThisEvent is ES_PIPE_RECOVERED) or (ThisEvent is ES_TIMEOUT and Event Parameter is PIPE_TIMER and inCelebration is 0) or (ThisEvent is ES_GAINED_POINT) or (ThisEvent is ES_GAMEOVER)
	Set NextState to Waiting2Play
	Play nothing
EndIf
If ThisEvent is ES_TIMEOUT and Event Parameter is 
AUDIO2_TIMER
				If CurrentNote equals NumberOfNotes
					If inArmedMode equals 1
						Post event ES_PLAY_TUNE to Audio2
						with event parameter ARMedMode
					Endif
					If inPipeOut equals 1
						Post event ES_PLAY_TUNE to Audio2
						with event parameter PipeOut
					Endif
Play nothing
					Set NextState to Waiting2Play
	Endif
If CurrentNote < NumberOfNotes
		Play note of TuneFreqs with index 
CurrentNote
Set audio timer for length of note in 
TuneDelays with index CurrentNote
Increment CurrentNote
				Endif
			Endif
		End Playing block

Set CurrentState to NextState

Return ES_NO_EVENT
End of RunAudio2