/*
<This Java Class is part of the jMusic API version 1.5, March 2004.>
Copyright (C) 2000 Andrew Sorensen & Andrew Brown
This program 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 2 of the License, or any
later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package jm.audio.synth;
import java.io.IOException;
import jm.audio.AudioObject;
import jm.audio.AOException;
import jm.music.data.Note;
/**
* Sums any number of inputs.
* @author Andrew Brown
*/
public final class Multiply extends AudioObject{
//----------------------------------------------
// Constructors
//----------------------------------------------
/**
* This constructor takes any number of AudioObjects
* as input expecting each of them to be passing
* in sample data to be summed before output.
* @param ao any number of Audio Objects.
*/
public Multiply(AudioObject[] ao){
super(ao, "[Multiply]");
}
//----------------------------------------------
// Methods
//----------------------------------------------
/**
* This nextWork method Multiplys all inputs together
* and passes on a normalised result of the
* sum.
* @param input any number of incoming samples
*/
public int work(float[] buffer)throws AOException{
float[][] buf = new float[this.inputs][];
buf[0] = new float[buffer.length];
int returned = this.previous[0].nextWork(buf[0]);
for(int i=1;i<inputs;i++){
buf[i] = new float[returned];
if(returned != this.previous[i].nextWork(buf[i])){
throw new AOException(this.name,0);
}
}
int ret=0;
for(;ret<returned;ret++){
buffer[ret] = buf[0][ret];
for(int j=1;j<inputs;j++){
buffer[ret]*=buf[j][ret];
}
}
return ret;
}
}