FileDocCategorySizeDatePackage
Handler.javaAPI DocJMF 2.1.1e5653Mon May 12 12:21:20 BST 2003com.sun.media.content.audio.cdaudio

Handler

public class Handler extends BasicPlayer
A CD player implementation using MCI.

Fields Summary
private int
frames
private int
minutes
private int
seconds
private int
hours
private int
track
private int
mins
private int
secs
private int
frms
private int
hrs
private com.sun.media.amovie.MCI
mci
private boolean
isPlaying
private byte[]
buffer
private long
nanos
private boolean
muted
private EomThread
eomThread
Constructors Summary
public Handler()


    // $$$$$TODO - robsz$$$
    // Implement a nice resource management scheme. Something that will check
    // if anybody else is playing a cd, and if so, stop them. It occurs to me
    // that some scheme like that might be also used in managing resources of
    // other players, at least those subclassing from JavaMedia. Some kind of
    // static variable, which holds all the players, a function which can
    // lower or raise thread priority of a player, maybe some ability to set
    // the framerate?

      
	mci = new MCI();
Methods Summary
protected booleanaudioEnabled()

	return true;
public java.lang.StringconvertToMsf(int f, int s, int m)

	if (f > 74) {
	    f %= 75;
	    s++;
	}
	if (s > 59) {
	    s %= 60;
	    m++;
	}
	String st = ""+m+":"+ s+":"+f;
	return st;
public voiddoClose()

	super.doClose();
	if (eomThread != null)
	    eomThread.kill();
protected booleandoRealize()

	PullSourceStream pss = (PullSourceStream)
	    (((PullDataSource)source).getStreams())[0];
        buffer = new byte[44];
	int count = 0;
	int tst;
	try {
	    count = pss.read(buffer, 0, 44);
	} catch(IOException e) {}
	if (count < 0) {
	    abortRealize();
	    return false;
	}
	frames = buffer[40];
	seconds = buffer[41];
	minutes = buffer[42];
	hours = buffer[43];
	track = (((int)buffer[22]) & 0xff);
	nanos = 60 * minutes + seconds; //seconds
	nanos *= 75; //frames
	nanos += frames;
	nanos *= 40; //nanos
	nanos = nanos * 333333;
	setMediaLength(nanos);
	//System.out.println("track "+track+" mins "+minutes+" secs "+seconds+
	//		   " frames "+frames+" nanos "+nanos);
	//System.out.println(track);
	track |=  ((((int) buffer[23]) & 0xff) << 8);
	//System.out.println(track);
	//System.out.println("Audio opened");
	mci.ssendString("open cdaudio shareable wait");
	mci.ssendString("stop cdaudio wait");
	mci.ssendString("close cdaudio wait");
	if (eomThread == null) {
	    eomThread = new EomThread(this);
	    eomThread.start();
	} else
	    eomThread.start();
	return true;
public voiddoSetMediaTime(javax.media.Time time)

	long now = time.getNanoseconds();
	secs =(int)( now / 1000000000);
	hrs = secs / 3600;
	mins = secs / 60;
	secs = secs % 60;
	now %= 1000000000;
	frms = (int) (now / (40 *333333));
	//System.out.println("Setting time to "+mins+":"+secs+":"+frms);
public voiddoStart()

	if (eomThread != null) 
	    eomThread.start();
	mci.sendString("set cdaudio time format msf wait");

	String st = convertToMsf(buffer[36]+frms, secs+buffer[37], buffer[38]+mins);

	String et = convertToMsf(buffer[36]+buffer[40], buffer[37]+buffer[41]-1,
				 buffer[38]+buffer[42]);

	mci.ssendString("open cdaudio shareable wait");
	String comm = "play cdaudio from "+st+" to "+et;
	mci.ssendString(comm);
	mci.ssendString("close cdaudio wait");

	isPlaying = true;
public voiddoStop()

	isPlaying = false;
	doSetMediaTime(getMediaTime());
	mci.ssendString("open cdaudio shareable wait");
	mci.ssendString("pause cdaudio wait");
	mci.ssendString("close cdaudio wait");
	if (eomThread != null)
	    eomThread.pause();
public voidgainChange(javax.media.GainChangeEvent gce)
public javax.media.TimegetDuration()

	//System.out.println("getDuration is called: "+nanos);
	return new Time(nanos);
public javax.media.TimeBasegetMasterTimeBase()

	return null;
public voidhandleEom()

	setTargetState(Prefetched);
	processEndOfMedia();
public voidmuteChange(boolean state)

	if ( state != muted ) {
	    muted = state;
	    mci.ssendString("open cdaudio shareable wait");
	    if (state) 
		mci.ssendString("set cdaudio audio all off wait");
	    else 
		mci.ssendString("set cdaudio audio all on wait");
	    mci.ssendString("close cdaudio wait");
	}
public voidsetSource(javax.media.protocol.DataSource source)

	if (source instanceof com.sun.media.protocol.file.DataSource) {
	    this.source = source;
	} else {
	    System.out.println("Unsupported data source: "+ source);
	    throw new IncompatibleSourceException(this+": doesn't support "+source);
	}
public voidupdateStats()
protected booleanvideoEnabled()

	return false;