src/main/java/net/pterodactylus/sonitus/data/sink/AudioSink.java

   1 /*
   2  * Sonitus - AudioSink.java - Copyright © 2013 David Roden
   3  *
   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.
   8  *
   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.
  13  *
  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/>.
  16  */
  17
  18 package net.pterodactylus.sonitus.data.sink;
  19
  20 import static com.google.common.base.Preconditions.*;
  21
  22 import java.util.logging.Logger;
  23 import javax.sound.sampled.AudioFormat;
  24 import javax.sound.sampled.AudioSystem;
  25 import javax.sound.sampled.LineUnavailableException;
  26 import javax.sound.sampled.SourceDataLine;
  27
  28 import net.pterodactylus.sonitus.data.ConnectException;
  29 import net.pterodactylus.sonitus.data.Connection;
  30 import net.pterodactylus.sonitus.data.Format;
  31 import net.pterodactylus.sonitus.data.Sink;
  32 import net.pterodactylus.sonitus.data.Source;
  33
  34 /**
  35  * {@link Sink} implementation that uses the JDK’s {@link javax.sound.sampled.AudioSystem} to play all {@link
  36  * net.pterodactylus.sonitus.data.Source}s.
  37  *
  38  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  39  */
  40 public class AudioSink implements Sink {
  41
  42         /** The logger. */
  43         private static final Logger logger = Logger.getLogger(AudioSink.class.getName());
  44
  45         @Override
  46         public void connect(Source source) throws ConnectException {
  47                 checkNotNull(source, "source must not be null");
  48                 checkState(source.format().encoding().equalsIgnoreCase("PCM"), "source must be PCM-encoded");
  49
  50                 final Format sourceFormat = source.format();
  51                 AudioFormat audioFormat = new AudioFormat(sourceFormat.frequency(), 16, sourceFormat.channels(), true, false);
  52                 try {
  53                         final SourceDataLine sourceDataLine = AudioSystem.getSourceDataLine(audioFormat);
  54                         sourceDataLine.open(audioFormat);
  55                         sourceDataLine.start();
  56                         new Thread(new Connection(source) {
  57                                 @Override
  58                                 protected int bufferSize() {
  59                                         return sourceFormat.channels() * sourceFormat.frequency() * 2;
  60                                 }
  61
  62                                 @Override
  63                                 protected void feed(byte[] buffer) {
  64                                         sourceDataLine.write(buffer, 0, buffer.length);
  65                                         logger.finest(String.format("AudioSink: Wrote %d Bytes.", buffer.length));
  66                                 }
  67                         }).start();
  68                 }
  69                 catch (LineUnavailableException lue1) {
  70                         throw new ConnectException(lue1);
  71                 }
  72         }
  73
  74 }