java显示声音波形图示例

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();
// }
}