Example of java displaying sound waveform diagram

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();

//}

}