/*
* 21.04.2004 Original verion. davagin@udm.ru.
*-----------------------------------------------------------------------
* 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 2 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, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*----------------------------------------------------------------------
*/
package davaguine.jmac.player;
import davaguine.jmac.decoder.IAPEDecompress;
import javax.sound.sampled.*;
/**
* Author: Dmitry Vaguine
* Date: 04.03.2004
* Time: 14:51:31
*/
public class JavaSoundAudioDevice extends AudioDeviceBase {
private SourceDataLine source = null;
private AudioFormat fmt = null;
protected void setAudioFormat(AudioFormat fmt0) {
fmt = fmt0;
}
protected AudioFormat getAudioFormat() {
if (fmt == null) {
IAPEDecompress decoder = getDecoder();
fmt = new AudioFormat(decoder.getApeInfoSampleRate(),
decoder.getApeInfoBitsPerSample(),
decoder.getApeInfoChannels(),
true,
false);
}
return fmt;
}
protected DataLine.Info getSourceLineInfo() {
AudioFormat fmt = getAudioFormat();
DataLine.Info info = new DataLine.Info(SourceDataLine.class, fmt, 4000);
return info;
}
public void open(AudioFormat fmt) {
if (!isOpen()) {
setAudioFormat(fmt);
openImpl();
setOpen(true);
}
}
protected void openImpl() {
}
// createSource fix.
protected void createSource() {
Throwable t = null;
try {
Line line = AudioSystem.getLine(getSourceLineInfo());
if (line instanceof SourceDataLine) {
source = (SourceDataLine) line;
source.open(fmt, millisecondsToBytes(fmt, 2000));
source.start();
}
} catch (RuntimeException ex) {
t = ex;
} catch (LinkageError ex) {
t = ex;
} catch (LineUnavailableException ex) {
t = ex;
}
if (source == null) throw new JMACPlayerException("cannot obtain source audio line", t);
}
public int millisecondsToBytes(AudioFormat fmt, int time) {
return (int) (time * (fmt.getSampleRate() * fmt.getChannels() * fmt.getSampleSizeInBits()) / 8000.0);
}
protected void closeImpl() {
if (source != null) {
source.close();
}
}
protected void writeImpl(byte[] samples, int offs, int len) {
if (source == null)
createSource();
source.write(samples, offs, len);
}
protected void flushImpl() {
if (source != null) {
source.drain();
}
}
public int getPosition() {
int pos = 0;
if (source != null) {
pos = (int) (source.getMicrosecondPosition() / 1000);
}
return pos;
}
/**
* Runs a short test by playing a short silent sound.
*/
public void test() {
try {
open(new AudioFormat(22050, 16, 1, true, false));
byte[] data = new byte[22050 / 5];
write(data, 0, data.length);
flush();
close();
} catch (RuntimeException ex) {
throw new JMACPlayerException("Device test failed: ", ex);
}
}
}