uk.co.javagear
Class NoiseGenerator

java.lang.Object
  uk.co.javagear.NoiseGenerator

public final class NoiseGenerator
extends java.lang.Object

Texas SN76496 noise generator emulation.

Version:

18th January 2003

Author:

Copyright (C) 2002-2003 Chris White

See Also:

"JavaGear Final Project Report"

Field Summary

private boolean	amplitudeFlipFlop Positive/Negative output.
private ToneGenerator	chan2 Pointer to Channel 2 / Tone Generator 3.
private double	counter Counter for square waves.
private boolean	enabled Channel Enabled.
private int	firstByte First byte of frequency.
private int	frequency Frequency of channel.
private int	noise Pointer to Noise.
private static int[]	PARITY
private double	psgCycles PSG Cycles Per Sample.
private static int	RESET Shift Register Reset Value SMS Specific (Bit 13).
private int	shift Noise Source.
private static int	SYNC_NOISE Sync/Periodic Noise (values from Maxim).
private int	tappedBits
private boolean	useChan2Freq Use Channel 2's Frequency.
private int	volume Volume of channel.
private static int	WHITE_NOISE White Noise (values from Maxim).

Constructor Summary

NoiseGenerator(double clockSpeed, int sampleRate, ToneGenerator t)
NoiseGenerator Constructor.

Method Summary

int	getSample() Return a single sample from noise generator.
int	getVolume() Returns the value of property volume.
void	reset() Reset Noise Generator to Default Values.
void	setEnabled() Toggle channel On/Off.
void	setFrequency(int f) Set channel frequency.
void	setVolume(int volume) Sets the value of property volume.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

PARITY

private static final int[] PARITY

RESET

private static final int RESET

Shift Register Reset Value SMS Specific (Bit 13).

See Also:

Constant Field Values

WHITE_NOISE

private static final int WHITE_NOISE

White Noise (values from Maxim).

See Also:

Constant Field Values

SYNC_NOISE

private static final int SYNC_NOISE

Sync/Periodic Noise (values from Maxim).

See Also:

Constant Field Values

volume

private int volume

Volume of channel.

frequency

private int frequency

Frequency of channel.

firstByte

private int firstByte

First byte of frequency.

counter

private double counter

Counter for square waves.

amplitudeFlipFlop

private boolean amplitudeFlipFlop

Positive/Negative output.

psgCycles

private double psgCycles

PSG Cycles Per Sample.

enabled

private boolean enabled

Channel Enabled.

shift

private int shift

Noise Source.

tappedBits

private int tappedBits

noise

private int noise

Pointer to Noise.

chan2

private ToneGenerator chan2

Pointer to Channel 2 / Tone Generator 3.

useChan2Freq

private boolean useChan2Freq

Use Channel 2's Frequency.

Constructor Detail

NoiseGenerator

public NoiseGenerator(double clockSpeed,
                      int sampleRate,
                      ToneGenerator t)

NoiseGenerator Constructor.

Parameters:

clockSpeed - Clock Speed (Hz)

sampleRate - Sample Rate (Hz)

t - Pointer to Tone Generator

Method Detail

reset

public void reset()

Reset Noise Generator to Default Values.

setEnabled

public void setEnabled()

Toggle channel On/Off.

setFrequency

public void setFrequency(int f)

Set channel frequency.

Parameters:

f - frequency.

getSample

public int getSample()

Return a single sample from noise generator.

Returns:

sample (0 to +15)

getVolume

public int getVolume()

Returns the value of property volume. The channel's volume.

Returns:

the value of property volume. The channel's volume.

setVolume

public void setVolume(int volume)

Sets the value of property volume. The channel's volume.

Parameters:

volume - the new value of property volume.