filter.java

java 3d game jme 工程开发源代码

/*
 * Copyright (c) 2003-2009 jMonkeyEngine
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * * Neither the name of 'jMonkeyEngine' nor the names of its contributors 
 *   may be used to endorse or promote products derived from this software 
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.jmex.audio.filter;

/**
 * @author Arman Ozcelik
 * @version $Id: Filter.java,v 1.1 2007/03/06 15:29:12 nca Exp $
 */
public abstract class Filter {

    protected double theta[];
    protected double adjust[];    
    protected double[] output;
    protected int frequencies[];
    protected double gainFactor;

    public Filter(int[] frequencies){
        this.frequencies=frequencies;
    }
    
    
    
    protected void initalize(int rate) {
        
        theta=new double[frequencies.length];
        adjust=new double[frequencies.length];
        for(int a=0; a<frequencies.length; a++){
            theta[a] = (2 * Math.PI * (frequencies[a]))/rate;
            
            adjust[a]=1.0;
        }
        gainFactor=1.0/frequencies.length;
        
    }

    public void setAdjustement(int frequencyIndex, double value) {
        adjust[frequencyIndex] = value;
    }



   public abstract byte[] filter(byte[] input);



}