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(); // } } 。