2 * Sonitus - ExternalMp3Encoder.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 net.pterodactylus.sonitus.data.ConnectException;
21 import net.pterodactylus.sonitus.data.Format;
22 import net.pterodactylus.sonitus.data.Source;
24 import com.google.common.base.Preconditions;
27 * Basic {@link ExternalFilter} implementation that verifies that the connected
28 * source is PCM-encoded and that returns an MP3-encoded format.
30 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
32 public abstract class ExternalMp3Encoder extends ExternalFilter {
35 public Format format() {
36 return super.format().encoding("MP3");
40 public void connect(Source source) throws ConnectException {
41 Preconditions.checkNotNull(source, "source must not be null");
42 Preconditions.checkState(source.format().encoding().equalsIgnoreCase("PCM"), "source must be PCM-encoded");
44 super.connect(source);