复制代码 代码如下:
package _tmp;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.ArrayDeque;
import java.util.Deque;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.Timer;
import java.util.TimerTask;

import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.SourceDataLine;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;

public class SoundTest {

public static class WaveformGraph extends JFrame {

private Deque<Short> deque = new LinkedList<Short>();
private Timer timer;
private Image buffered;
private Image showing;

public WaveformGraph(int width, int height) {
setSize(width, height);
timer = new Timer();
buffered = new BufferedImage(width, height, BufferedImage.TYPE_4BYTE_ABGR);
timer.schedule(new TimerTask() {
@Override public void run() {

Graphics g = buffered.getGraphics();
g.setColor(Color.WHITE);
g.fillRect(0, 0, getWidth(), getHeight());
g.setColor(Color.BLACK);

g.translate(10, getHeight()/2);

synchronized (deque) {
float heightRate = 1;
if(deque.size() > 1) {
Iterator<Short> iter = deque.iterator();
Short p1 = iter.next();
Short p2 = iter.next();
int x1 = 0, x2 = 0;
while(iter.hasNext()) {
g.drawLine(x1, (int)(p1*heightRate), x2, (int)(p2*heightRate));

p1 = p2;
p2 = iter.next();
x1 = x2;
x2 += 1;
}
}
}
g.dispose();

SwingUtilities.invokeLater(new Runnable() {
@Override public void run() {
showing = buffered;
repaint();
showing = null;
}
});
}
}, 100, 100);
}

@Override
public void paint(Graphics g) {
super.paint(g);
if(buffered!=null) {
g.drawImage(buffered, 0, 0, null);
}
}

public void put(short v) {
synchronized (deque) {
deque.add(v);
if(deque.size() > 500) {
deque.removeFirst();
}
}
}

public void clear() {
deque.clear();
}
}

public static void main(String[] args) throws Exception {
//record();
WaveformGraph waveformGraph = new WaveformGraph(500, 300);
waveformGraph.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
waveformGraph.setVisible(true);

AudioInputStream ais = AudioSystem.getAudioInputStream(new File("C:\\Documents and Settings\\wml\\My Documents\\My Music\\苏仨 - 失眠症.wav"));
printFormat(ais.getFormat());

SourceDataLine player = AudioSystem.getSourceDataLine(ais.getFormat());

player.open();
player.start();

byte[] buf = new byte[4];
int len;
while((len=ais.read(buf))!=-1) {

if(ais.getFormat().getChannels() == 2) {
if(ais.getFormat().getSampleRate() == 16) {
waveformGraph.put((short) ((buf[1] << 8) | buf[0]));//左声道

//waveformGraph.put((short) ((buf[3] << 8) | buf[2]));//右声道
} else {
waveformGraph.put(buf[1]);//左声道
waveformGraph.put(buf[3]);//左声道

//waveformGraph.put(buf[2]);//右声道
//waveformGraph.put(buf[4]);//右声道
}
} else {
if(ais.getFormat().getSampleRate() == 16) {
waveformGraph.put((short) ((buf[1] << 8) | buf[0]));
waveformGraph.put((short) ((buf[3] << 8) | buf[2]));
} else {
waveformGraph.put(buf[1]);
waveformGraph.put(buf[2]);
waveformGraph.put(buf[3]);
waveformGraph.put(buf[4]);
}
}

player.write(buf, 0, len);
}

player.close();
ais.close();
}

public static void printFormat(AudioFormat format) {
System.out.println(format.getEncoding() + " => "
+ format.getSampleRate()+" hz, "
+ format.getSampleSizeInBits() + " bit, "
+ format.getChannels() + " channel, "
+ format.getFrameRate() + " frames/second, "
+ format.getFrameSize() + " bytes/frame");
}

//public static void record() throws LineUnavailableException,
//InterruptedException {
//AudioFormat audioFormat = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, 48000F, 16, 1, 2, 48000F, false);
//Info recordDevInfo = new DataLine.Info(TargetDataLine.class, audioFormat);
//
//final TargetDataLine recordLine = (TargetDataLine) AudioSystem.getLine(recordDevInfo);
//final SourceDataLine playLine = AudioSystem.getSourceDataLine(audioFormat);
//
//recordLine.open(audioFormat, recordLine.getBufferSize());
//playLine.open(audioFormat, recordLine.getBufferSize());
//
//Thread recorder = new Thread() {
//public void run() {
//recordLine.start();
//playLine.start();
//
//FloatControl fc = (FloatControl) playLine.getControl(FloatControl.Type.MASTER_GAIN);
//double value = 2;
//float dB = (float) (Math.log(value == 0.0 ? 0.0001 : value) / Math.log(10.0) * 20.0);
//fc.setValue(dB);
//
//try {
//AudioInputStream in = new AudioInputStream(recordLine);
//byte[] buf = new byte[recordLine.getBufferSize()];
//int len;
//while((len=in.read(buf)) != -1) {
//playLine.write(buf, 0, len);
//}
//} catch (IOException e) {
//e.printStackTrace();
//} finally {
//recordLine.stop();
//playLine.stop();
//}
//};
//};
//recorder.start();
//recorder.join();
//}
}