/**
* Copyright 2004-2006 DFKI GmbH.
* All Rights Reserved. Use is subject to license terms.
*
* This file is part of MARY TTS.
*
* MARY TTS is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, version 3 of the License.
*
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package marytts.signalproc.analysis;
import marytts.signalproc.process.InlineDataProcessor;
import marytts.util.data.BufferedDoubleDataSource;
import marytts.util.data.DoubleDataSource;
/**
*
* @author Marc Schröder
*
* Computes energy of the input signal
*
*/
public class Signal2EnergyConverter extends BufferedDoubleDataSource {
protected static InlineDataProcessor processor = new InlineDataProcessor() {
/**
* For each signal sample, compute the signal energy as the square of the signal sample.
*/
public void applyInline(double[] buf, int off, int len) {
for (int i = off; i < off + len; i++) {
buf[i] = buf[i] * buf[i];
assert buf[i] >= 0;
}
}
};
public Signal2EnergyConverter(double[] signal) {
super(signal, processor);
}
public Signal2EnergyConverter(DoubleDataSource signal) {
super(signal, processor);
}
/**
* For each signal sample, compute the signal energy as the square of the signal sample.
*
* @param off
* the number of items in buf preceding writePos to process
* @param len
* the length
*/
public void processNewData(int off, int len) {
for (int i = off; i < off + len; i++) {
buf[i] = buf[i] * buf[i];
assert buf[i] >= 0;
}
}
}