code: /*******************************************************************************
   * Copyright (c) 2013 Attila Kovacs <attila[AT]sigmyne.com>.
   * All rights reserved. 
   * 
   * This file is part of crush.
   * 
   *     crush is free software: you can redistribute it and/or modify
   *     it under the terms of the GNU General Public License as published by
   *     the Free Software Foundation, either version 3 of the License, or
   *     (at your option) any later version.
   * 
   *     crush is distributed in the hope that it will be useful,
   *     but WITHOUT ANY WARRANTY; without even the implied warranty of
   *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *     GNU General Public License for more details.
   * 
   *     You should have received a copy of the GNU General Public License
   *     along with crush.  If not, see <http://www.gnu.org/licenses/>.
   * 
   * Contributors:
   *     Attila Kovacs <attila[AT]sigmyne.com> - initial API and implementation
   ******************************************************************************/
  package crush.filters;
  
  import crush.Channel;
  import crush.Frame;
  import crush.Integration;
  
  public abstract class VariedFilter extends Filter {
  	/**
  	 * 
  	 */
  	private static final long serialVersionUID = 5414130961462551874L;
  	
  	protected float dp;
  
  	
  	
  	public VariedFilter(Integration<?> integration) {
  		super(integration);
  	}
  
  	public VariedFilter(Integration<?> integration, float[] data) {
  		super(integration, data);
  	}
  	
  	
  	//public float[] getSourceProfile() { return sourceProfile; 
  	
  	
  	@Override
  	protected void preFilter(Channel channel) {
  		final double response = getPointResponse(channel);
  		if(response > 0.0) {
  			channel.directFiltering /= response;
  			channel.sourceFiltering /= response;
  		}
  		super.preFilter(channel);
  	}
  		
  	
  	@Override
  	protected void postFilter(Channel channel) {	
  		super.postFilter(channel);
  		
  		final double rejected = countParms();
  		parms.addAsync(channel, rejected);
  		
  		dp = points >= 0.0 ? (float) (rejected / points) : 0.0F;
  		
  		final double response = calcPointResponse(channel);
  		
  		if(Double.isNaN(response)) return;
  		
  		setPointResponse(channel, response);
  		
  		channel.directFiltering *= response;
  		channel.sourceFiltering *= response;
  		
  		/*
  		double weighRescale = 1.0 - rejected / points;
  		channel.weight *= weighRescale;
  		*/
  	}
  	
  	
  	@Override
  	protected void remove(final float value, final Frame exposure, final int channel) {
  		if(exposure == null) return;
  		exposure.data[channel] -= value;
  		if(exposure.sampleFlag[channel] == 0) frameParms[exposure.index] += exposure.relativeWeight * dp;		
  	}
  	
  	@Override
  	protected void dftFilter(Channel channel) {
  		throw new UnsupportedOperationException("No DFT for adaptive filters.");
  	}
  
  	
  
  }
  