2 * Sonitus - VolumeFilter.java - Copyright © 2013 David Roden
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 3 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 package net.pterodactylus.sonitus.data.filter;
20 import java.util.Arrays;
21 import java.util.List;
23 import net.pterodactylus.sonitus.data.Controller;
24 import net.pterodactylus.sonitus.data.Filter;
25 import net.pterodactylus.sonitus.data.controller.Fader;
26 import net.pterodactylus.sonitus.data.controller.Switch;
28 import com.google.common.eventbus.EventBus;
31 * Internal {@link Filter} implementation that can reduce the volume of the
34 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
36 public class VolumeFilter extends AudioProcessingFilter {
38 /** The volume fader. */
39 private final Fader volumeFader;
41 /** The mute switch. */
42 private final Switch muteSwitch;
45 * Creates a new volume filter.
50 public VolumeFilter(EventBus eventBus) {
51 super(eventBus, "Volume");
52 volumeFader = new Fader("Volume", 1.0);
53 muteSwitch = new Switch("Mute", false);
61 public List<Controller<?>> controllers() {
62 return Arrays.<Controller<?>>asList(volumeFader, muteSwitch);
66 // AUDIOPROCESSINGFILTER METHODS
70 protected int[] processSamples(int[] samples) {
71 int[] processedSamples = new int[samples.length];
72 double volumeFactor = volumeFader.value();
73 for (int channel = 0; channel < samples.length; ++channel) {
74 processedSamples[channel] = muteSwitch.value() ? 0 : (int) (samples[channel] * volumeFactor);
76 return processedSamples;