2 * Sonitus - AbstractFilter.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.io.EOFException;
21 import java.io.IOException;
22 import java.io.InputStream;
23 import java.io.OutputStream;
24 import java.io.PipedInputStream;
25 import java.io.PipedOutputStream;
26 import java.util.Arrays;
28 import net.pterodactylus.sonitus.data.Filter;
29 import net.pterodactylus.sonitus.data.Metadata;
31 import com.google.common.io.Closeables;
34 * Dummy {@link Filter} implementation that pipes its input to its output.
36 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
38 public class DummyFilter implements Filter {
40 /** The input stream from which to read. */
41 private InputStream inputStream;
43 /** The output stream to which to write. */
44 private OutputStream outputStream;
46 /** The current metadata. */
47 private Metadata metadata;
54 public void open(Metadata metadata) throws IOException {
55 this.metadata = metadata;
56 inputStream = createInputStream();
57 outputStream = createOutputStream();
63 Closeables.close(outputStream, true);
64 Closeables.close(inputStream, true);
65 } catch (IOException e) {
71 public Metadata metadata() {
76 public void metadataUpdated(Metadata metadata) {
77 this.metadata = metadata;
81 public void process(byte[] buffer) throws IOException {
82 outputStream.write(buffer);
87 public byte[] get(int bufferSize) throws IOException {
88 byte[] buffer = new byte[bufferSize];
89 int read = inputStream.read(buffer);
91 throw new EOFException();
93 return Arrays.copyOf(buffer, read);
101 * Creates the input stream from which {@link net.pterodactylus.sonitus.data.Pipeline}
102 * will read the audio data. If you override this, you have to override {@link
103 * #createOutputStream()}, too!
105 * @return The input stream to read from
106 * @throws IOException
107 * if an I/O error occurs
109 protected InputStream createInputStream() throws IOException {
110 return new PipedInputStream();
114 * Creates the output stream to which {@link net.pterodactylus.sonitus.data.Pipeline}
115 * will write the audio data. If you override this, you have to override {@link
116 * #createInputStream()}, too!
118 * @return The output stream to write to
119 * @throws IOException
120 * if an I/O error occurs
122 protected OutputStream createOutputStream() throws IOException {
123 return new PipedOutputStream((PipedInputStream) inputStream);