2 * Sonitus - AudioSink.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.sink;
20 import static javax.sound.sampled.FloatControl.Type.VOLUME;
22 import java.io.IOException;
23 import java.io.OutputStream;
24 import java.util.Arrays;
25 import java.util.List;
26 import java.util.logging.Logger;
27 import javax.sound.sampled.AudioFormat;
28 import javax.sound.sampled.AudioSystem;
29 import javax.sound.sampled.FloatControl;
30 import javax.sound.sampled.LineUnavailableException;
31 import javax.sound.sampled.SourceDataLine;
33 import net.pterodactylus.sonitus.data.Controller;
34 import net.pterodactylus.sonitus.data.Metadata;
35 import net.pterodactylus.sonitus.data.Sink;
36 import net.pterodactylus.sonitus.data.Source;
37 import net.pterodactylus.sonitus.data.controller.Fader;
38 import net.pterodactylus.sonitus.data.controller.Switch;
39 import net.pterodactylus.sonitus.io.IntegralWriteOutputStream;
41 import com.google.common.base.Preconditions;
44 * {@link Sink} implementation that uses the JDK’s {@link AudioSystem} to play
45 * all {@link Source}s.
47 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
49 public class AudioSink implements Sink {
52 private static final Logger logger = Logger.getLogger(AudioSink.class.getName());
54 /** The volume fader. */
55 private final Fader volumeFader;
57 /** The “mute” switch. */
58 private final Switch muteSwitch;
60 /** The current metadata. */
61 private Metadata metadata;
63 /** The audio output. */
64 private SourceDataLine sourceDataLine;
66 /** A buffered output stream to ensure correct writing to the source data line. */
67 private OutputStream sourceDataLineOutputStream = new IntegralWriteOutputStream(new OutputStream() {
70 public void write(int b) throws IOException {
74 public void write(byte[] b) throws IOException {
75 write(b, 0, b.length);
79 public void write(byte[] b, int off, int len) throws IOException {
80 if (sourceDataLine != null) {
81 sourceDataLine.write(b, off, len);
86 /** Creates a new audio sink. */
88 volumeFader = new Fader("Volume") {
91 protected void valueSet(Double value) {
92 if (sourceDataLine != null) {
93 FloatControl volumeControl = (FloatControl) sourceDataLine.getControl(VOLUME);
94 volumeControl.setValue((float) (value * volumeControl.getMaximum()));
98 muteSwitch = new Switch("Mute") {
100 private float previousValue;
103 protected void valueSet(Boolean value) {
104 if (sourceDataLine != null) {
105 FloatControl volumeControl = (FloatControl) sourceDataLine.getControl(VOLUME);
107 previousValue = volumeControl.getValue();
108 volumeControl.setValue(0);
110 volumeControl.setValue(previousValue);
118 // CONTROLLED METHODS
122 public String name() {
123 return "Audio Output";
127 public List<Controller<?>> controllers() {
128 return Arrays.<Controller<?>>asList(volumeFader, muteSwitch);
136 public void open(Metadata metadata) throws IOException {
137 Preconditions.checkArgument(metadata.encoding().equalsIgnoreCase("PCM"), "source must be PCM-encoded");
138 AudioFormat audioFormat = new AudioFormat(metadata.frequency(), 16, metadata.channels(), true, false);
140 sourceDataLine = AudioSystem.getSourceDataLine(audioFormat);
141 sourceDataLine.open(audioFormat);
142 sourceDataLine.start();
143 } catch (LineUnavailableException e) {
145 throw new IOException(e);
150 public void close() {
151 sourceDataLine.stop();
152 sourceDataLine.close();
156 public void metadataUpdated(Metadata metadata) {
157 logger.info(String.format("Now playing %s.", metadata));
161 public void process(byte[] buffer) throws IOException {
162 sourceDataLineOutputStream.write(buffer);
163 logger.finest(String.format("AudioSink: Wrote %d Bytes.", buffer.length));