org.anhonesteffort.p25.util.CircularFloatAveragingQueue.java Source code

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Here is the source code for org.anhonesteffort.p25.util.CircularFloatAveragingQueue.java

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/*
 * Copyright (C) 2015 An Honest Effort LLC, fuck the police.
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */

package org.anhonesteffort.p25.util;

import org.apache.commons.collections4.queue.CircularFifoQueue;

import java.util.stream.IntStream;

public class CircularFloatAveragingQueue {

    private final CircularFifoQueue<float[]> queue;
    private final int queueLimit;
    private int queueSize = 0;
    private int arrayLength = 0;

    public CircularFloatAveragingQueue(int size) {
        queue = new CircularFifoQueue<>(size);
        queueLimit = size;
    }

    public boolean isEmpty() {
        return queueSize == 0;
    }

    public void add(float[] floats) {
        queue.add(floats);
        queueSize = (queueSize < queueLimit) ? ++queueSize : queueLimit;
        arrayLength = floats.length;
    }

    public float[] remove() {
        float[] averages = new float[arrayLength];

        IntStream.range(0, arrayLength)
                .forEach(arrayIndex -> averages[arrayIndex] = (float) IntStream.range(0, queueSize)
                        .mapToDouble(queueIndex -> (double) queue.get(queueIndex)[arrayIndex]).average()
                        .getAsDouble());

        queue.remove();
        queueSize--;
        return averages;
    }

    public void clear() {
        queue.clear();
    }

}