jmfutils.java~2~

是用java语言写的一个简易的播放器还有播放列表的功能

package jvideosystem.util;

import java.net.InetAddress;
import java.awt.*;

import javax.media.*;
import javax.media.protocol.*;
import javax.media.control.*;
import javax.media.bean.playerbean.*;
import javax.media.rtp.*;
import javax.media.rtp.rtcp.*;
import javax.media.format.*;

import com.sun.media.util.JMFI18N;
import com.sun.media.rtp.RTPSessionMgr;

import jmapps.ui.*;


public class JMFUtils {

    public static MediaPlayer createMediaPlayer ( String nameUrl, Frame frame,
                                                  String audioEffect,
                                                  String videoEffect) {
        MediaLocator    mediaLocator = null;
        MediaPlayer     mediaPlayer = null;
        Player player = null;

        mediaLocator = new MediaLocator ( nameUrl );
        if ( mediaLocator == null  ||  nameUrl.equals("") ) {
            MessageDialog.createErrorDialog ( frame, JMFI18N.getResource("jmstudio.error.buildurlfor") + " " + nameUrl );
            return ( null );
        }
        if (audioEffect != null || videoEffect != null) {
            try {
                Processor proc = javax.media.Manager.createProcessor(mediaLocator);
                StateHelper sh = new StateHelper(proc);
                if (sh.configure()) {
                    TrackControl [] tc = proc.getTrackControls();
                    for (int i = 0; i < tc.length; i++) {
                        if (audioEffect != null && tc[i].isEnabled() &&
                            tc[i].getFormat() instanceof AudioFormat) {
                            assignEffect(tc[i], audioEffect);
                        } else if (videoEffect != null && tc[i].isEnabled() &&
                                   tc[i].getFormat() instanceof VideoFormat) {
                            assignEffect(tc[i], videoEffect);
                        }
                    }
                    proc.setContentDescriptor(null);
                    if (sh.realize()) {
                        player = proc;
                    }
                }
            } catch (Throwable t) {
                if (t instanceof ThreadDeath)
                    throw (ThreadDeath) t;
            }
        }

        mediaPlayer = new MediaPlayer ();
        if (player == null)
            mediaPlayer.setMediaLocator ( mediaLocator );
        else {
            mediaPlayer.setControlPanelVisible(false);
            mediaPlayer.setPlayer(player);
        }
        if ( mediaPlayer.getPlayer() == null ) {
            MessageDialog.createErrorDialog ( frame, JMFI18N.getResource("jmstudio.error.player.createfor") + " " + nameUrl );
            return ( null );
        }

        return ( mediaPlayer );
    }

    public static MediaPlayer createMediaPlayer ( DataSource dataSource, Frame frame ) {
        MediaPlayer     mediaPlayer = null;

        if ( dataSource == null ) {
            MessageDialog.createErrorDialog ( frame, JMFI18N.getResource("jmstudio.error.player.createfor") + " " + dataSource );
            return ( null );
        }

        mediaPlayer = new MediaPlayer();
        mediaPlayer.setDataSource( dataSource );
        if ( mediaPlayer.getPlayer() == null ) {
            MessageDialog.createErrorDialog ( frame, JMFI18N.getResource("jmstudio.error.player.createfor") + " " + dataSource );
            return ( null );
        }

        return ( mediaPlayer );
    }

    public static MediaPlayer createMediaPlayer ( Player player, Frame frame ) {
        MediaPlayer     mediaPlayer = null;

        if ( player == null ) {
            MessageDialog.createErrorDialog ( frame, JMFI18N.getResource("jmstudio.error.player.createfor") + " " + player );
            return ( null );
        }

        mediaPlayer = new MediaPlayer();
        mediaPlayer.setPlayer ( player );
        if ( mediaPlayer.getPlayer() == null ) {
            MessageDialog.createErrorDialog ( frame, JMFI18N.getResource("jmstudio.error.player.createfor") + " " + player );
            return ( null );
        }

        return ( mediaPlayer );
    }

    private static void assignEffect(TrackControl tc, String effect) {
        try {
            Class cl = Class.forName(effect);
            Effect ef = (Effect) cl.newInstance();
            Codec [] codecs = new Codec[] {ef};
            tc.setCodecChain(codecs);
        } catch (Throwable t) {
            if (t instanceof ThreadDeath)
                throw (ThreadDeath) t;
        }
    }

    // Creates capture DataSources for the requested device names and formats
    // Handles cases such as merging the two datasources, creating only
    // datasource if both device names are the same - that is, the device handles
    // both audio and video capture
    public static DataSource createCaptureDataSource ( String strAudioDevice,
                                                    Format audioFormat,
                                                    String strVideoDevice,
                                                    Format videoFormat ) {
            DataSource  dsOne = null;
        DataSource  dsTwo = null;
        DataSource  sources [];
        DataSource  merged = null;

        if (strAudioDevice == null  &&  strVideoDevice == null)
            return null;

        if ( strAudioDevice == null  ||  strVideoDevice == null ) {
            // Case 1 : Only one capture device

            // Figure out which device - audio or video - and create a datasource
            if (strAudioDevice != null)
                    dsOne = initializeCaptureDataSource ( null, strAudioDevice, audioFormat );
            else
                dsOne = initializeCaptureDataSource ( null, strVideoDevice, videoFormat );

        }
        else if ( !strAudioDevice.equals(strVideoDevice) ) {
            // Case 2 : Different capture devices

            // create the ds for audio
            dsOne = initializeCaptureDataSource ( null, strAudioDevice, audioFormat );
            if ( dsOne == null )
                    return null;

            // create the ds for video
            dsTwo = initializeCaptureDataSource ( null, strVideoDevice, videoFormat );
            if (dsTwo == null)
                    return null;

            // Merge the two
            sources = new DataSource [] { dsOne, dsTwo };
            try {
                    merged = javax.media.Manager.createMergingDataSource ( sources );
            }
            catch (javax.media.IncompatibleSourceException ise) {
            }
            dsOne = merged;
        } else {
            // Case 3 : Both device names are the same.

            dsOne = initializeCaptureDataSource ( null, strAudioDevice, audioFormat);
            if (dsOne == null)
                    return null;
            dsOne = initializeCaptureDataSource ( dsOne, strVideoDevice, videoFormat);
        }

        if ( dsOne == null )
            return null;

            try {
            dsOne.connect();
        }
        catch (java.io.IOException ioe) {
            return null;
        }
        return dsOne;
    }

    // Creates a DataSource for the given device name and sets the format on the
    // FormatControl exposed by the CaptureDevice (data source)
    //  Uses the specified data source ds or creates a new one if null
    public static DataSource initializeCaptureDataSource ( DataSource ds,
                                                        String deviceName,
                                                        Format format ) {
            MediaLocator        deviceURL;
        CaptureDeviceInfo   cdi;
        DataSource          dataSource = ds;
        FormatControl       formatControls [];
        Format              formats [];

        if ( ds == null ) {
            cdi = CaptureDeviceManager.getDevice ( deviceName );
            if (cdi == null)
                    return null;
            deviceURL = cdi.getLocator();

            try {
                    dataSource = javax.media.Manager.createDataSource(deviceURL);
                if (dataSource == null)
                    return null;
            } catch (NoDataSourceException ndse) {
                    return null;
            } catch (java.io.IOException ioe) {
                    return null;
            }
        }

        if ( format == null )
            return dataSource;

        if ( format != null  &&  !(dataSource instanceof CaptureDevice) )
            return null;

        formatControls = ((CaptureDevice) dataSource).getFormatControls();
        if ( formatControls == null  ||  formatControls.length == 0 )
            return null;
        for ( int i = 0; i < formatControls.length; i++ ) {
            if ( formatControls[i] == null )
                    continue;
            formats = formatControls[i].getSupportedFormats();
            if (formats == null)
                    return null;
//            System.err.println("Trying format " + format);
            if (matches(format, formats) != null) {
                    formatControls[i].setFormat(format);
//                System.err.println("Matching format = " + format);
                return dataSource;
            }
        }
        return null;
    }

    private static Format matches ( Format format, Format supported[] ) {
        if ( supported == null )
            return null;
        for ( int i = 0;  i < supported.length;  i++ ) {
            if ( supported[i].matches(format) )
                return supported[i];
        }
        return null;
    }

    public static RTPSessionMgr createSessionManager ( String strAddress, String strPort, String strTtl, ReceiveStreamListener listener )
    {
        int             nPort;
        int             nTtl;
        RTPSessionMgr   mngrSession;

        nPort = Integer.valueOf(strPort).intValue();
        nTtl = Integer.valueOf(strTtl).intValue();
        mngrSession = createSessionManager ( strAddress, nPort, nTtl, listener );
        return ( mngrSession );
    }

    public static RTPSessionMgr createSessionManager ( String strAddress, int nPort, int nTtl, ReceiveStreamListener listener )
    {
        RTPSessionMgr       mngrSession;
        String              nameUser = null;
        String              cname;
        SessionAddress      addrLocal;
        InetAddress         addrDest;
        SessionAddress      addrSession;
        SourceDescription   arrUserDescr [];

        mngrSession = (RTPSessionMgr) RTPManager.newInstance();

        if ( mngrSession == null )
            return null;

        if (listener != null)
            mngrSession.addReceiveStreamListener(listener);

        // ask RTPSM to generate the local participants CNAME
        cname = mngrSession.generateCNAME ();
        try {
            nameUser = System.getProperty("user.name");
        } catch (SecurityException e){
            nameUser = "jmf-user";
        }

        // create our local Session Address
        addrLocal = new SessionAddress();
        try {
            addrDest = InetAddress.getByName ( strAddress );
            addrSession = new SessionAddress ( addrDest, nPort, addrDest, nPort + 1 );

            SessionAddress localAddr, destAddr;

            if( addrDest.isMulticastAddress()) {
                    // local and remote address pairs are identical:
                localAddr= new SessionAddress( addrDest,
                                                   nPort,
                                                   nTtl);
                destAddr = new SessionAddress( addrDest,
                                                       nPort,
                                                         nTtl);

            } else {
                       localAddr= new SessionAddress( InetAddress.getLocalHost(),
                                                            nPort);
                destAddr = new SessionAddress( addrDest,
                                                          nPort);
            }

            mngrSession.initialize( localAddr);
            mngrSession.addTarget( destAddr);
        }
        catch ( Exception e ) {
//            e.printStackTrace ();
            return null;
        }

        return mngrSession;
    }


}