capture.java

P2P聊天系统 该程序是由NetBeans IDE 6.5

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package voice;

/**
 *
 * @author Administrator
 */
//音频捕获部分，
//Capture.java
import java.io.*;
import javax.sound.sampled.*;
import java.net.*;


public class Capture implements Runnable {

       TargetDataLine line;
       Thread thread;
       Socket s;
       BufferedOutputStream captrueOutputStream;

       public Capture(Socket s){//构造器 取得socket以获得网络输出流
         this.s=s;
       }

       public void start() {

           thread = new Thread(this);
           thread.setName("Capture");
           thread.start();
       }

       public void stop() {
           thread = null;
       }

       public void run() {

           try {
             captrueOutputStream=new BufferedOutputStream(s.getOutputStream());//建立输出流 此处可以加套压缩流用来压缩数据
           }
           catch (IOException ex) {
               return;
           }

           AudioFormat format =new AudioFormat(8000,16,2,true,true);//AudioFormat(float sampleRate, int sampleSizeInBits, int channels, boolean signed, boolean bigEndian）
           DataLine.Info info = new DataLine.Info(TargetDataLine.class,format);

           try {
               line = (TargetDataLine) AudioSystem.getLine(info);
               line.open(format, line.getBufferSize());
           } catch (Exception ex) {
               return;
           }

           byte[] data = new byte[1024];//此处的1024可以情况进行调整，应跟下面的1024应保持一致
           int numBytesRead=0;
           line.start();

           while (thread != null) {
               numBytesRead = line.read(data, 0,128);//取数据（1024）的大小直接关系到传输的速度，一般越小越快，
               try {
                 captrueOutputStream.write(data, 0, numBytesRead);//写入网络流
               }
               catch (Exception ex) {
                   break;
               }
           }

           line.stop();
           line.close();
           line = null;

           try {
               //captrueOutputStream.flush();
               captrueOutputStream.close();
           } catch (IOException ex) {
               ex.printStackTrace();
           }
       }

}