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;
27 import java.util.Collections;
28 import java.util.List;
30 import net.pterodactylus.sonitus.data.AbstractControlledComponent;
31 import net.pterodactylus.sonitus.data.Controller;
32 import net.pterodactylus.sonitus.data.Filter;
33 import net.pterodactylus.sonitus.data.Metadata;
35 import com.google.common.io.Closeables;
38 * Dummy {@link Filter} implementation that pipes its input to its output.
40 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
42 public class DummyFilter extends AbstractControlledComponent implements Filter {
44 /** The input stream from which to read. */
45 private InputStream inputStream;
47 /** The output stream to which to write. */
48 private OutputStream outputStream;
51 * Creates a new dummy filter with the given name.
54 * The name of the filter
56 public DummyFilter(String name) {
65 public List<Controller<?>> controllers() {
66 return Collections.emptyList();
74 public void open(Metadata metadata) throws IOException {
75 metadataUpdated(metadata);
76 inputStream = createInputStream();
77 outputStream = createOutputStream();
83 Closeables.close(outputStream, true);
84 Closeables.close(inputStream, true);
85 } catch (IOException e) {
91 public void process(byte[] buffer) throws IOException {
92 outputStream.write(buffer);
97 public byte[] get(int bufferSize) throws IOException {
98 byte[] buffer = new byte[bufferSize];
99 int read = inputStream.read(buffer);
101 throw new EOFException();
103 return Arrays.copyOf(buffer, read);
111 * Creates the input stream from which {@link net.pterodactylus.sonitus.data.Pipeline}
112 * will read the audio data. If you override this, you have to override {@link
113 * #createOutputStream()}, too!
115 * @return The input stream to read from
116 * @throws IOException
117 * if an I/O error occurs
119 protected InputStream createInputStream() throws IOException {
120 return new PipedInputStream();
124 * Creates the output stream to which {@link net.pterodactylus.sonitus.data.Pipeline}
125 * will write the audio data. If you override this, you have to override {@link
126 * #createInputStream()}, too!
128 * @return The output stream to write to
129 * @throws IOException
130 * if an I/O error occurs
132 protected OutputStream createOutputStream() throws IOException {
133 return new PipedOutputStream((PipedInputStream) inputStream);