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/*
* 11/26/04 Buffer size modified to support JRE 1.5 optimizations.
* (CPU usage < 1% under P4/2Ghz, RAM < 12MB).
* jlayer@javazoom.net
* 11/19/04 1.0 moved to LGPL.
* 06/04/01 Too fast playback fixed. mdm@techie.com
* 29/01/00 Initial version. mdm@techie.com
*-----------------------------------------------------------------------
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library 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 Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*----------------------------------------------------------------------
*/
package javazoom.jl.player;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.Line;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;
import javazoom.jl.decoder.Decoder;
import javazoom.jl.decoder.JavaLayerException;
/**
* The <code>JavaSoundAudioDevice</code> implements an audio
* device by using the JavaSound API.
*
* @since 0.0.8
* @author Mat McGowan
*/
public class JavaSoundAudioDevice extends AudioDeviceBase
{
private SourceDataLine source = null;
private AudioFormat fmt = null;
private byte[] byteBuf = new byte[4096];
protected void setAudioFormat(AudioFormat fmt0)
{
fmt = fmt0;
}
protected AudioFormat getAudioFormat()
{
if (fmt==null)
{
Decoder decoder = getDecoder();
fmt = new AudioFormat(decoder.getOutputFrequency(),
16,
decoder.getOutputChannels(),
true,
false);
}
return fmt;
}
protected DataLine.Info getSourceLineInfo()
{
AudioFormat fmt = getAudioFormat();
//DataLine.Info info = new DataLine.Info(SourceDataLine.class, fmt, 4000);
DataLine.Info info = new DataLine.Info(SourceDataLine.class, fmt);
return info;
}
public void open(AudioFormat fmt) throws JavaLayerException
{
if (!isOpen())
{
setAudioFormat(fmt);
openImpl();
setOpen(true);
}
}
protected void openImpl()
throws JavaLayerException
{
}
// createSource fix.
protected void createSource() throws JavaLayerException
{
Throwable t = null;
try
{
Line line = AudioSystem.getLine(getSourceLineInfo());
if (line instanceof SourceDataLine)
{
source = (SourceDataLine)line;
//source.open(fmt, millisecondsToBytes(fmt, 2000));
source.open(fmt);
/*
if (source.isControlSupported(FloatControl.Type.MASTER_GAIN))
{
FloatControl c = (FloatControl)source.getControl(FloatControl.Type.MASTER_GAIN);
c.setValue(c.getMaximum());
}*/
source.start();
}
} catch (RuntimeException ex)
{
t = ex;
}
catch (LinkageError ex)
{
t = ex;
}
catch (LineUnavailableException ex)
{
t = ex;
}
if (source==null) throw new JavaLayerException("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(short[] samples, int offs, int len)
throws JavaLayerException
{
if (source==null)
createSource();
byte[] b = toByteArray(samples, offs, len);
source.write(b, 0, len*2);
}
protected byte[] getByteArray(int length)
{
if (byteBuf.length < length)
{
byteBuf = new byte[length+1024];
}
return byteBuf;
}
protected byte[] toByteArray(short[] samples, int offs, int len)
{
byte[] b = getByteArray(len*2);
int idx = 0;
short s;
while (len-- > 0)
{
s = samples[offs++];
b[idx++] = (byte)s;
b[idx++] = (byte)(s>>>8);
}
return b;
}
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()
throws JavaLayerException
{
try
{
open(new AudioFormat(22050, 16, 1, true, false));
short[] data = new short[22050/10];
write(data, 0, data.length);
flush();
close();
}
catch (RuntimeException ex)
{
throw new JavaLayerException("Device test failed: "+ex);
}
}
}
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