audioutils.java

Example of recording sound coming from the windows default audio device.

/**
 *
 * Copyright 2007 Stefanie Tellex
 *
 * This file is part of Fefie.com Sound Recorder.
 *
 * Fefie.com Sound Recorder 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 2 of the License, or
 * (at your option) any later version.
 *
 * Fefie.com Sound Recorder 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 Foobar; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
package com.fefie.sound_recorder.audio;

import javax.sound.sampled.AudioFileFormat;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.Line;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.Mixer;
import javax.sound.sampled.TargetDataLine;

public class AudioUtils {
	
	public static AudioFileFormat.Type RAW_TYPE = new AudioFileFormat.Type("raw", "raw");
	
	public static class LineAndStream {
		private final TargetDataLine mLine;
		private final AudioInputStream mStream;
		public TargetDataLine getLine() {
			return mLine;
		}
		public AudioInputStream getStream() {
			return mStream;
		}
		public LineAndStream(TargetDataLine line, AudioInputStream stream) {
			mLine = line;
			mStream = stream;
		}
	}

	/**
	 * Gets an AudioInputStream that reads from a microphone and outputs the specified format. 
	 * Throws an exception if it can't. 
	 */
	public static LineAndStream getRecordingStream(AudioFormat format) {
		try {
			
			TargetDataLine line = AudioSystem.getTargetDataLine(format);
			return new LineAndStream(line, new AudioInputStream(line));
			
		} catch (Exception iae) {
			int mNum = -1;
			for (Mixer.Info mInfo : AudioSystem.getMixerInfo()) {
				mNum++;
				Mixer m = AudioSystem.getMixer(mInfo);
				for (Line.Info lInfo : m.getTargetLineInfo()) {
					try {
						if (lInfo.getLineClass().equals(TargetDataLine.class)) {
							DataLine.Info dInfo = (DataLine.Info) lInfo;
							for (AudioFormat f: dInfo.getFormats()) {
								if (AudioSystem.isConversionSupported(format, f)) {
									try {
										TargetDataLine candidate = (TargetDataLine) m.getLine(dInfo);
										AudioFormat specifiedFormat = new AudioFormat(f.getEncoding(), format.getSampleRate(), f.getSampleSizeInBits(), f.getChannels(), f.getFrameSize(), format.getSampleRate(), f.isBigEndian());
										
										candidate.open(specifiedFormat);
										

										AudioInputStream baseStream = new AudioInputStream(candidate);

										return new LineAndStream(candidate, AudioSystem.getAudioInputStream(format, baseStream));
									} catch (IllegalArgumentException iae1) {
										iae1.printStackTrace();
									}
								}
							}
						
							

						}
					} catch (LineUnavailableException lue) {
						//lue.printStackTrace();
					}

				}
			}
			
		}
		throw new IllegalArgumentException("Couldn't make line for format " + format);
	}

}