wavplayer.java

J2me唆哈的代码

/*
 * Created on 2005-9-27 by pcy
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
package a.a.a.mmedia;


import javax.microedition.media.MediaException;
import javax.microedition.media.PlayerListener;
import javax.sound.sampled.*;

public class WavPlayer extends BasicPlayer implements Runnable {

    private Clip clip;
    //private SourceDataLine line;
    private Thread thread;
    AudioInputStream ais;
    //byte[] data;
    public WavPlayer() {
        super();
    }

    protected void doRealize() throws MediaException {
        try{
            if(stream!=null){
                ais=AudioSystem.getAudioInputStream(stream);
                /*if(data==null){
                    data=new byte[ais.available()];
                }
                ais.read(data);*/
                AudioFormat format=ais.getFormat();
                DataLine.Info info=new DataLine.Info(Clip.class,format,
                        (int)ais.getFrameLength()*format.getFrameSize());
                clip=(Clip)AudioSystem.getLine(info);
                info=null;
                clip.open(ais);
                /*DataLine.Info info2=new DataLine.Info(SourceDataLine.class,format,
                        (int)ais.getFrameLength()*format.getFrameSize());
                line=(SourceDataLine)AudioSystem.getLine(info2);
                line.open(format);*/
                ais=null;
            }
        }catch(Exception e){
            throw new MediaException(e.getMessage());
        }
    }

    protected void doPrefetch() throws MediaException {

    }

    protected boolean doStart() {
        if(thread!=null){
            thread.interrupt();
            thread=null;
        }
        thread=new Thread(this);
        thread.start();
        return true;
    }

    protected void doStop() {
        if(clip!=null&&clip.isRunning()){
            clip.stop();
        }
    }

    protected void doDeallocate() {
        if(clip!=null&&clip.isOpen()){
            clip.close();
        }
        clip=null;
        if(thread!=null){
            thread.interrupt();
            thread=null;        
        }
    }

    protected void doClose() {
        if(clip!=null){
            if(clip.isOpen()){
                clip.close();
            }
        }
    }

    protected long doSetMediaTime(long now) throws MediaException {
        clip.setMicrosecondPosition(now);
        return clip.getMicrosecondPosition();
    }

    protected long doGetMediaTime() {

        return clip.getMicrosecondPosition();
    }

    protected long doGetDuration() {
        return clip.getMicrosecondLength();
    }

    protected javax.microedition.media.Control doGetControl(String type) {
        if ((getState() >= REALIZED) && 
                type.equals("javax.microedition.media.control.VolumeControl")) {
                return this;
        }
        return null;
    }

    protected int doSetLevel(int vol) {
        if(clip.isControlSupported(FloatControl.Type.VOLUME)){
            ((FloatControl)clip.getControl(FloatControl.Type.VOLUME)).setValue((float)vol/100);
            return vol;
        }else{
            if(clip.isControlSupported(BooleanControl.Type.MUTE)){
                if(vol<=0){
                    ((BooleanControl)clip.getControl(BooleanControl.Type.MUTE)).setValue(true);
                }else if(vol>0){
                    ((BooleanControl)clip.getControl(BooleanControl.Type.MUTE)).setValue(false);
                }
            }
            return (int)(clip.getLevel()*100);
        }
    }

    public void run() {
        if(clip!=null&&clip.isOpen()){
            clip.start();
            while (clip.isActive() && thread != null) {
                try {
                    Thread.sleep(300);
                }catch (Exception e) {
                    break;
                }
            }
            this.sendEvent(PlayerListener.END_OF_MEDIA,null);
        }
        if(thread!=null){
            thread.interrupt();
            thread=null;
        }
    }

    public String getContentType() {
        chkClosed(true);
        return "audio/x-wav";
    }
}