/*
* 21.04.2004 Original verion. davagin@udm.ru.
*-----------------------------------------------------------------------
* 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
* (at your option) 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 davaguine.jmac.decoder;
/**
* Author: Dmitry Vaguine
* Date: 04.03.2004
* Time: 14:51:31
*/
public class AntiPredictorOffset extends AntiPredictor {
public void AntiPredict(int[] pInputArray, int[] pOutputArray, int NumberOfElements, int Offset, int DeltaM) {
System.arraycopy(pInputArray, 0, pOutputArray, 0, Offset);
int ip = Offset;
int ipo = 0;
int op = Offset;
int m = 0;
for (; op < NumberOfElements; ip++, ipo++, op++) {
pOutputArray[op] = pInputArray[ip] + ((pOutputArray[ipo] * m) >> 12);
if ((pOutputArray[ipo] ^ pInputArray[ip]) > 0)
m += DeltaM;
else
m -= DeltaM;
}
}
}