2 * Sonitus - OggVorbisDecoder.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 static com.google.common.base.Preconditions.checkArgument;
21 import static com.google.common.base.Preconditions.checkNotNull;
23 import java.io.IOException;
25 import net.pterodactylus.sonitus.data.Metadata;
27 import com.google.common.collect.ImmutableList;
28 import com.google.common.eventbus.EventBus;
31 * Ogg Vorbis decoder that uses {@code oggdec} (from the {@code vorbis-tools}
32 * package) to decode the Ogg Vorbis stream.
34 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
36 public class OggVorbisDecoder extends ExternalFilter {
38 /** The location of the binary. */
39 private final String binary;
41 /** Whether to swap bytes. */
42 private boolean swapBytes;
45 * Creates a new Ogg Vorbis decoder.
50 * The location of the binary
52 public OggVorbisDecoder(EventBus eventBus, String binary) {
53 super(eventBus, "Ogg Vorbis Decoder");
58 * Sets whether to swap bytes on the decoded output.
61 * {@code true} to swap bytes on the decoded output, {@code false} otherwise
62 * @return This Ogg Vorbis decoder
64 public OggVorbisDecoder swapBytes(boolean swapBytes) {
65 this.swapBytes = swapBytes;
74 public Metadata metadata() {
75 return super.metadata().encoding("PCM");
79 public void open(Metadata metadata) throws IOException {
80 checkNotNull(metadata, "metadata must not be null");
81 checkArgument(metadata.encoding().equalsIgnoreCase("Vorbis"), "source must be Vorbis-encoded");
87 // EXTERNALFILTER METHODS
91 protected String binary(Metadata metadata) {
96 protected Iterable<String> parameters(Metadata metadata) {
97 ImmutableList.Builder<String> parameters = ImmutableList.builder();
100 parameters.add("-e").add("1");
102 parameters.add("-o").add("-");
104 return parameters.build();