Capturing audio through applet using Java Sound
hi fellows i need ur help.
I am working on a voice project to Capture & Play the sound using java sound API instead of JMF. I can capture , play and transmit the sound through application. It works pretty fine but when i convert it to the applet, it is not working.
I got the full system permissions and also signed the applet for Internet Explorer. Also i packed the
javax.sound.midi.*
javax.sound.sampled.*
classes in the signed cab.
After doing all this i am getting the AudioFormat not supported exception. I changed the format and used all the combinations but still getting this error
No line matching interface TargetDataLine supporting format PCM_SIGNED, 16000.0 Hz, 16 bit, mono, big-endian, audio data is supported.
java.lang.IllegalArgumentException: No line matching interface TargetDataLine supporting format PCM_SIGNED, 16000.0 Hz, 16 bit, mono, big-endian, audio data is supported.
at javax/sound/sampled/AudioSystem.getLine (AudioSystem.java:312)
at com/vsoft/voice/VoiceRecord.run (VoiceApplet.java:93)
at java/lang/Thread.run (Thread.java)plz help me to sort out this problem.
plz have a look over this problem
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When you try to list some audio related names (such as mix name, port name, control name) by using java sound api, and if the names are writtened by non-ascii character such as Chinese, you will get the strange characters, that means java sound api does not support internationalization character. Here is the sample:
* SystemMixerFrame.java
* Copyright (c) 2001 - 2002 by Matthias Pfisterer
* All rights reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.BooleanControl;
import javax.sound.sampled.CompoundControl;
import javax.sound.sampled.Control;
import javax.sound.sampled.EnumControl;
import javax.sound.sampled.FloatControl;
import javax.sound.sampled.Line;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.Mixer;
import javax.sound.sampled.Port;
IDEAS:
- user setting tab style vs. show complete windows for multiple mixers (horicontal/vertical)
- user setting unix style (L/R volume) vs. windows style (volume/balance)
/** TODO:
public class TestSystemMixer {
/** TODO:
private static final Port.Info[] EMPTY_PORT_INFO_ARRAY = new Port.Info[0];
public static void main(String[] args) {
new TestSystemMixer();
System.exit(0);
/** TODO:
public TestSystemMixer()
List portMixers = getPortMixers();
if (portMixers.size() == 0) {
out("There are no mixers that support Port lines.SystemMixer: Error");
System.exit(1);
Iterator iterator = portMixers.iterator();
while (iterator.hasNext())
Mixer mixer = (Mixer) iterator.next();
String strMixerName = mixer.getMixerInfo().getName();
out("mixername:" + strMixerName);
createMixerPanel(mixer);
/** Returns the Mixers that support Port lines.
private List getPortMixers()
List supportingMixers = new ArrayList();
Mixer.Info[] aMixerInfos = AudioSystem.getMixerInfo();
for (int i = 0; i < aMixerInfos.length; i++)
Mixer mixer = AudioSystem.getMixer(aMixerInfos);
boolean bSupportsPorts = arePortsSupported(mixer);
if (bSupportsPorts)
supportingMixers.add(mixer);
return supportingMixers;
/** TODO:
// should be implemented by:
// Mixer.isLineSupported(new Line.Info(Port.class))
private boolean arePortsSupported(Mixer mixer)
Line.Info[] infos;
infos = mixer.getSourceLineInfo();
for (int i = 0; i < infos.length; i++)
if (infos[i] instanceof Port.Info)
return true;
infos = mixer.getTargetLineInfo();
for (int i = 0; i < infos.length; i++)
if (infos[i] instanceof Port.Info)
return true;
return false;
/** TODO:
private void createMixerPanel(Mixer mixer)
Port.Info[] infosToCheck = getPortInfo(mixer);
for (int i = 0; i < infosToCheck.length; i++)
Port port = null;
try
port = (Port) mixer.getLine(infosToCheck[i]);
port.open();
catch (LineUnavailableException e)
e.printStackTrace();
if (port != null)
createPortPanel(port);
/** TODO:
private Port.Info[] getPortInfo(Mixer mixer)
Line.Info[] infos;
List portInfoList = new ArrayList();
infos = mixer.getSourceLineInfo();
for (int i = 0; i < infos.length; i++)
if (infos[i] instanceof Port.Info)
portInfoList.add((Port.Info) infos[i]);
infos = mixer.getTargetLineInfo();
for (int i = 0; i < infos.length; i++)
if (infos[i] instanceof Port.Info)
portInfoList.add((Port.Info) infos[i]);
Port.Info[] portInfos = (Port.Info[]) portInfoList.toArray(EMPTY_PORT_INFO_ARRAY);
return portInfos;
/** TODO:
private void createPortPanel(Port port)
String strPortName = ((Port.Info) port.getLineInfo()).getName();
out("Portname:" + strPortName);
Control[] aControls = port.getControls();
// for (int i = 0; i < aControls.length; i++)
if (aControls.length > 1) {
// In fact in the windows system, it named SPEAKER port, and it contains play controls.
out("ignore the port " + strPortName + " that contains more than one control.");
} else {
// this is record control.
out("control:" + aControls[0].toString());
createControlComponent(aControls[0]);
if (aControls[0] instanceof FloatControl)
else
/** TODO:
private void createControlComponent(Control control)
if (control instanceof BooleanControl)
String strControlName = control.getType().toString();
out("sub control type BooleanControl:" + strControlName);
else if (control instanceof EnumControl)
String strControlName = control.getType().toString();
out("sub control type EnumControl:" + strControlName);
System.out.println("WARNING: EnumControl is not yet supported");
else if (control instanceof FloatControl)
String strControlName = control.getType().toString();
out("sub control type FloatControl:" + strControlName);
else if (control instanceof CompoundControl)
String strControlName = control.getType().toString();
out("sub control type CompoundControl:" + strControlName);
Control[] aControls = ((CompoundControl)control).getMemberControls();
for (int i = 0; i < aControls.length; i++)
Control con = aControls[i];
if (con instanceof BooleanControl) {
out("sub sub control type BooleanControl:" + con.getType().toString());
if (strControlName.equalsIgnoreCase("Stereo Mix")) {
((BooleanControl) con).setValue(true);
else if (con instanceof EnumControl) {
out("sub sub control type EnumControl:" + con.getType().toString());
else if (con instanceof FloatControl)
if (isBalanceOrPan((FloatControl) con))
out("sub sub control type FloatControl balance:" + con.getType().toString());
else
out("sub sub control type FloatControl pan:" + con.getType().toString());
else
/** Returns whether the type of a FloatControl is BALANCE or PAN.
private static boolean isBalanceOrPan(FloatControl control)
Control.Type type = control.getType();
return type.equals(FloatControl.Type.PAN) || type.equals(FloatControl.Type.BALANCE);
private static void out(String message)
System.out.println(message);
/*** SystemMixerFrame.java ***/
Compile and run the code below on non-ascii Windows OS, you will catch the problem.
The solution I provide:
Download the jdk 1.4.2 source, search the files named PortMixer.c && PortMixerProvider.c and replace the method "NewStringUTF" with the method below:
jstring WindowsTojstring2( JNIEnv* env, char* str )
jstring rtn = 0;
int slen = strlen(str);
unsigned short* buffer = 0;
if( slen == 0 )
rtn = (*env)->NewStringUTF(env,str );
else
int length = MultiByteToWideChar( CP_ACP, 0, (LPCSTR)str, slen, NULL, 0 );
buffer = malloc( length*2 + 1 );
if( MultiByteToWideChar( CP_ACP, 0, (LPCSTR)str, slen, (LPWSTR)buffer, length ) >0 )
rtn = (*env)->NewString( env, (jchar*)buffer, length );
if( buffer )
free( buffer );
return rtn;
Rebuild jdk source code as per sun build document. Got the result files and pick up jsound.dll, replace the original jsound.dll in your JRE with the fixed file.
Then the problem solved. I also hope sun will fix the problem in the future version of JDK.
Or any one can help me to submit this article to the sun JDK team.
Jiawei Zhang
From Chinese, The city of Shanghai.
MSN: [email protected]If you only wanted to get a beep you could have used Toolkit.beep
Very simple and fast.
Rommie.
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