Capturing Audio with Java Sound API
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.SourceDataLine;
import javax.sound.sampled.TargetDataLine;
public class Main {
public static void main(String args[]) throws Exception {
final ByteArrayOutputStream out = new ByteArrayOutputStream();
float sampleRate = 8000;
int sampleSizeInBits = 8;
int channels = 1;
boolean signed = true;
boolean bigEndian = true;
final AudioFormat format = new AudioFormat(sampleRate, sampleSizeInBits, channels, signed,
bigEndian);
DataLine.Info info = new DataLine.Info(TargetDataLine.class, format);
final TargetDataLine line = (TargetDataLine) AudioSystem.getLine(info);
line.open(format);
line.start();
Runnable runner = new Runnable() {
int bufferSize = (int) format.getSampleRate() * format.getFrameSize();
byte buffer[] = new byte[bufferSize];
public void run() {
try {
int count = line.read(buffer, 0, buffer.length);
if (count > 0) {
out.write(buffer, 0, count);
}
out.close();
} catch (IOException e) {
System.err.println("I/O problems: " + e);
System.exit(-1);
}
}
};
Thread captureThread = new Thread(runner);
captureThread.start();
byte audio[] = out.toByteArray();
InputStream input = new ByteArrayInputStream(audio);
final SourceDataLine line1 = (SourceDataLine) AudioSystem.getLine(info);
final AudioInputStream ais = new AudioInputStream(input, format, audio.length
/ format.getFrameSize());
line1.open(format);
line1.start();
runner = new Runnable() {
int bufferSize = (int) format.getSampleRate() * format.getFrameSize();
byte buffer[] = new byte[bufferSize];
public void run() {
try {
int count;
while ((count = ais.read(buffer, 0, buffer.length)) != -1) {
if (count > 0) {
line1.write(buffer, 0, count);
}
}
line1.drain();
line1.close();
} catch (IOException e) {
System.err.println("I/O problems: " + e);
System.exit(-3);
}
}
};
Thread playThread = new Thread(runner);
playThread.start();
}
}
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