/*
<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 jm.audio.AOException;
import jm.audio.AudioObject;
/**
* Sums any number of inputs.
*
* @author Andrew Sorensen
* @version 1.0, Sun Feb 25 18:42:46 2001
*/
public final class Add 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 Add(AudioObject[] ao) {
super(ao, "[Add]");
}
//----------------------------------------------
// Methods
//----------------------------------------------
/**
* This nextWork method adds 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++) {
for (int j = 0; j < inputs; j++) {
buffer[ret] += buf[j][ret];
}
}
return ret;
}
}