From: David ‘Bombe’ Roden Date: Sun, 26 May 2013 15:53:06 +0000 (+0200) Subject: Add stereo separation filter. X-Git-Url: https://git.pterodactylus.net/?a=commitdiff_plain;h=b00efe47280214fdcf0860bd87adc96278cc0918;p=sonitus.git Add stereo separation filter. --- diff --git a/src/main/java/net/pterodactylus/sonitus/data/filter/StereoSeparationFilter.java b/src/main/java/net/pterodactylus/sonitus/data/filter/StereoSeparationFilter.java new file mode 100644 index 0000000..d3ec652 --- /dev/null +++ b/src/main/java/net/pterodactylus/sonitus/data/filter/StereoSeparationFilter.java @@ -0,0 +1,68 @@ +/* + * Sonitus - StereoSeparationFilter.java - Copyright © 2013 David Roden + * + * 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 . + */ + +package net.pterodactylus.sonitus.data.filter; + +import java.util.Arrays; +import java.util.List; + +import net.pterodactylus.sonitus.data.Controller; +import net.pterodactylus.sonitus.data.Filter; +import net.pterodactylus.sonitus.data.controller.Knob; + +/** + * {@link Filter} implementation that can reduce the stereo width of a signal, + * or even reverse the channels. + * + * @author David ‘Bombe’ Roden + */ +public class StereoSeparationFilter extends AudioProcessingFilter { + + /** The separation knob. */ + private final Knob separationKnob; + + /** Creates a new stereo separation filter. */ + public StereoSeparationFilter() { + separationKnob = new Knob("Separation", 1.0); + } + + // + // CONTROLLED METHODS + // + + @Override + public List> controllers() { + return Arrays.>asList(separationKnob); + } + + // + // AUDIOPROCESSINGFILTER METHODS + // + + @Override + protected int[] processSamples(int[] samples) { + if (samples.length == 1) { + return samples; + } + int[] processedSamples = new int[samples.length]; + double a = (separationKnob.value() + 1) / 2.0; + processedSamples[0] = (int) (samples[0] * a + samples[1] * (1 - a)); + processedSamples[1] = (int) (samples[1] * a + samples[0] * (1 - a)); + return processedSamples; + } + +}