Add audio sink.

diff --git a/src/main/java/net/pterodactylus/sonitus/data/sink/AudioSink.java b/src/main/java/net/pterodactylus/sonitus/data/sink/AudioSink.java
new file mode 100644 (file)
index 0000000..5d1ebbc
--- /dev/null
+++ b/src/main/java/net/pterodactylus/sonitus/data/sink/AudioSink.java
@@ -0,0 +1,74 @@
+/*
+ * Sonitus - AudioSink.java - Copyright © 2013 David Roden
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package net.pterodactylus.sonitus.data.sink;
+
+import static com.google.common.base.Preconditions.*;
+
+import java.util.logging.Logger;
+import javax.sound.sampled.AudioFormat;
+import javax.sound.sampled.AudioSystem;
+import javax.sound.sampled.LineUnavailableException;
+import javax.sound.sampled.SourceDataLine;
+
+import net.pterodactylus.sonitus.data.ConnectException;
+import net.pterodactylus.sonitus.data.Connection;
+import net.pterodactylus.sonitus.data.Format;
+import net.pterodactylus.sonitus.data.Sink;
+import net.pterodactylus.sonitus.data.Source;
+
+/**
+ * {@link Sink} implementation that uses the JDK’s {@link javax.sound.sampled.AudioSystem} to play all {@link
+ * net.pterodactylus.sonitus.data.Source}s.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public class AudioSink implements Sink {
+
+       /** The logger. */
+       private static final Logger logger = Logger.getLogger(AudioSink.class.getName());
+
+       @Override
+       public void connect(Source source) throws ConnectException {
+               checkNotNull(source, "source must not be null");
+               checkState(source.format().encoding().equalsIgnoreCase("PCM"), "source must be PCM-encoded");
+
+               final Format sourceFormat = source.format();
+               AudioFormat audioFormat = new AudioFormat(sourceFormat.frequency(), 16, sourceFormat.channels(), true, false);
+               try {
+                       final SourceDataLine sourceDataLine = AudioSystem.getSourceDataLine(audioFormat);
+                       sourceDataLine.open(audioFormat);
+                       sourceDataLine.start();
+                       new Thread(new Connection(source) {
+                               @Override
+                               protected int bufferSize() {
+                                       return sourceFormat.channels() * sourceFormat.frequency() * 2;
+                               }
+
+                               @Override
+                               protected void feed(byte[] buffer) {
+                                       sourceDataLine.write(buffer, 0, buffer.length);
+                                       logger.finest(String.format("AudioSink: Wrote %d Bytes.", buffer.length));
+                               }
+                       }).start();
+               }
+               catch (LineUnavailableException lue1) {
+                       throw new ConnectException(lue1);
+               }
+       }
+
+}