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/***********************************************************************/
import javax.media.sound.sampled.*;
import java.applet.*;
import java.awt.*;
import java.io.*;
/*
* Reads data from the input channel and writes to the output stream
*/
public class Capture extends Applet implements Runnable{
TargetDataLine line;
Thread thread;
private Button startCaptureButton, stopCaptureButton;
public void init()
{
System.out.println("init");
this.setBackground(Color.white);
startCaptureButton = new Button("Start Capture");
startCaptureButton.setForeground(Color.black);
startCaptureButton.setBackground(Color.lightGray);
this.add(startCaptureButton);
stopCaptureButton = new Button("Stop Capture");
stopCaptureButton.setForeground(Color.black);
stopCaptureButton.setBackground(Color.lightGray);
this.add(stopCaptureButton);
}
public boolean action(Event event, Object arg)
{
System.out.println("action");
if(event.target == startCaptureButton)
{
this.debut();
return true;
}
else if(event.target == stopCaptureButton)
{
this.fin();
return true;
}
else
return super.action(event, arg);
}
public void debut() {
System.out.println("start1");
thread = new Thread(this);
thread.setName("Capture");
System.out.println("start2");
thread.start();
}
public void fin() {
System.out.println("stop");
thread = null;
}
public void run() {
// define the required attributes for our line,
// and make sure a compatible line is supported.
Type encoding = AudioFormat.PCM_SIGNED;
float rate = 44100;
int sampleSize = 16;
int channels = 2;
boolean bigEndian = true;
AudioFormat format = new AudioFormat(encoding, rate, sampleSize,
channels, (sampleSize/8)*channels, rate, bigEndian);
DataLine.Info info = new DataLine.Info(TargetDataLine.class,
null, null, new Class[0], format, AudioSystem.NOT_SPECIFIED);
System.out.println("run");
if (!AudioSystem.isSupportedLine(info)) {
System.out.println("Line matching " + info + " not supported.");
return;
}
System.out.println("supported");
// get and open the target data line for capture.
try {
line = (TargetDataLine) AudioSystem.getLine(info);
System.out.println("line_open?");
line.open(format, 5000); //line.getBufferSize());
} catch (LineUnavailableException ex) {
System.out.println("Unable to open the line: " + ex);
return;
}
catch (SecurityException ex) {
System.out.println("Unable to open the line: " + ex);
}
System.out.println("open");
// play back the captured audio data
ByteArrayOutputStream out = new ByteArrayOutputStream();
int frameSizeInBytes = format.getFrameSize();
int bufferLengthInFrames = line.getBufferSize() / 8;
int bufferLengthInBytes = bufferLengthInFrames * frameSizeInBytes;
byte[] data = new byte[bufferLengthInBytes];
int numFramesRead;
line.start();
System.out.println("line start");
while (thread != null) {
if ((numFramesRead = line.read(data, 0, bufferLengthInFrames)) ==
-1) {
break;
}
out.write(data, 0, (numFramesRead * frameSizeInBytes));
}
System.out.println("line stop");
// we reached the end of the stream. stop and close the line.
line.stop();
line.close();
line = null;
System.out.println("line null");
// stop and close the output stream
try {
out.flush();
out.close();
} catch (IOException ex) {
ex.printStackTrace();
}
System.out.println("stream close");
// load bytes into the audio input stream for playback
byte audioBytes[] = out.toByteArray();
ByteArrayInputStream bais = new ByteArrayInputStream(audioBytes);
AudioInputStream audioInputStream = new AudioInputStream(bais, format,
audioBytes.length / frameSizeInBytes);
try {
audioInputStream.reset();
} catch (Exception ex) {
ex.printStackTrace();
}
System.out.println("end");
}
}
/***********************************************************************/
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