EnhancedNoiseGeneratorVoice.java

/*
  EnhancedNoiseGeneratorVoice.java

  (c) 2009-2013 Edward Swartz

  All rights reserved. This program and the accompanying materials
  are made available under the terms of the Eclipse Public License v1.0
  which accompanies this distribution, and is available at
  http://www.eclipse.org/legal/epl-v10.html
 */
package v9t9.audio.sound;

/**
 * TMS9919(B) noise generator.
 * @author ejs
 *
 */
public class EnhancedNoiseGeneratorVoice extends NoiseGeneratorVoice implements EnhancedVoice {

	private EffectsController effectsController;

	public EnhancedNoiseGeneratorVoice(String name) {
		super(name);
		effectsController = new EffectsController(this);
	}

	public EffectsController getEffectsController() {
		return effectsController;
	}
	
	@Override
	protected boolean updateAccumulator() {
		return effectsController.updateDivisor();
	}
	@Override
	public float getCurrentMagnitude() {
		return (float) effectsController.getCurrentSample() / 0x007FFFFF;
	}
	@Override
	protected void updateEffect() {
		effectsController.updateEffect();
	}
	@Override
	public boolean isActive() {
		return super.isActive() || effectsController.isActive();
	}
	
	/* (non-Javadoc)
	 * @see v9t9.audio.sound.ClockedSoundVoice#setPeriod(int)
	 */
	@Override
	public void setPeriod(int period) {
		super.setPeriod(period);
		effectsController.updateFrequency();
	}
	
	/* (non-Javadoc)
	 * @see v9t9.audio.sound.SoundVoice#setVolume(int)
	 */
	@Override
	public void setVolume(int volume) {
		super.setVolume(volume);
		if (volume == 0)
			effectsController.stopEnvelope();
		else
			effectsController.updateVoice();
	}
}