panelmediatargetformat.java

里面是关于jmf编程的例子,希望能给初学者带来一些帮助

/*
 * @(#)PanelMediaTargetFormat.java	1.4 00/04/13
 *
 * Copyright (c) 1999 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
 * modify and redistribute this software in source and binary code form,
 * provided that i) this copyright notice and license appear on all copies of
 * the software; and ii) Licensee does not utilize the software in a manner
 * which is disparaging to Sun.
 *
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
 * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
 * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
 * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
 * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
 * LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
 * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
 * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
 * OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 *
 * This software is not designed or intended for use in on-line control of
 * aircraft, air traffic, aircraft navigation or aircraft communications; or in
 * the design, construction, operation or maintenance of any nuclear
 * facility. Licensee represents and warrants that it will not use or
 * redistribute the Software for such purposes.
 */

package jmapps.export;

import java.util.*;
import java.awt.*;
import java.awt.event.*;

import javax.media.*;
import javax.media.control.*;
import javax.media.format.*;
import javax.media.protocol.*;
//import javax.media.datasink.*;

import com.sun.media.util.JMFI18N;
import com.sun.media.ui.TabControl;
import com.sun.media.ui.AudioFormatChooser;
import com.sun.media.ui.VideoFormatChooser;

import jmapps.ui.*;


public class PanelMediaTargetFormat extends JMPanel implements ActionListener, ItemListener {

    private Processor               processor = null;
    private String                  strTargetType = PanelMediaTargetType.TYPE_OTHER;
    private ContentDescriptor       arrContentDescriptors [] = null;
    private Hashtable               hashtableContentDescriptors = null;
    private TrackControl            arrTrackControls [] = null;
    private String                  arrAllowContentType [] = null;

    private JMPanel         panelContent;
    private Choice          comboContentType;
    private TabControl      tabControl;
    private Vector          vectorPanelsAudio;
    private Vector          vectorPanelsVideo;
    private Vector          vectorTracksAudio;
    private Vector          vectorTracksVideo;

    private Image           imageAudioEn = null;
    private Image           imageAudioDis = null;
    private Image           imageVideoEn = null;
    private Image           imageVideoDis = null;


    public PanelMediaTargetFormat () {
    	super ();

    	try {
    	    init ();
    	}
    	catch ( Exception exception ) {
    	    exception.printStackTrace ();
    	}
    }

    public void setAllowContentType ( String arrAllowContentType[] ) {
        this.arrAllowContentType = arrAllowContentType;
    }

    private void init () throws Exception {
    	Panel	   panelDescription;
//        Toolkit    toolkit;

    	this.setLayout ( new BorderLayout(6,6) );

    	panelDescription = new Panel ( new GridLayout(0,1) );
    	this.add ( panelDescription, BorderLayout.NORTH );
    	panelDescription.add ( new Label(JMFI18N.getResource("jmstudio.export.format.label1")) );
    	panelDescription.add ( new Label(JMFI18N.getResource("jmstudio.export.format.label2")) );

        panelContent = new JMPanel ( new BorderLayout(6,6) );
        panelContent.setEmptyBorder ( 6, 6, 6, 6 );
        this.add ( panelContent, BorderLayout.CENTER );

        imageAudioEn = ImageArea.loadImage ( "audio.gif", this, true );
        imageAudioDis = ImageArea.loadImage ( "audio-disabled.gif", this, true );
        imageVideoEn = ImageArea.loadImage ( "video.gif", this, true );
        imageVideoDis = ImageArea.loadImage ( "video-disabled.gif", this, true );
    }

    public void setProcessor ( Processor processor, String strContType, String strTargetType ) {
        this.processor = processor;
        this.strTargetType = strTargetType;

        arrContentDescriptors = processor.getSupportedContentDescriptors ();
        arrTrackControls = processor.getTrackControls ();

        panelContent.removeAll ();
        buildPage ();

        if ( strTargetType.equals(PanelMediaTargetType.TYPE_NETWORK) )
            strContType = (new ContentDescriptor(ContentDescriptor.RAW_RTP)).toString ();
        if ( strTargetType.equals(PanelMediaTargetType.TYPE_SCREEN) )
            strContType = (new ContentDescriptor(ContentDescriptor.RAW)).toString ();

        if ( strContType != null )
            comboContentType.select ( strContType );
        changeContentType ();
    }

    public void updateProcessorFormat () {
        int                 i;
        int                 nCount;
        VideoFormatChooser  panelVideo;
        AudioFormatChooser  panelAudio;
        TrackControl        trackControl;
        Format              format;


        nCount = vectorPanelsVideo.size ();
        for ( i = 0;  i < nCount;  i++ ) {
            panelVideo = (VideoFormatChooser) vectorPanelsVideo.elementAt ( i );
            trackControl = (TrackControl) vectorTracksVideo.elementAt ( i );

            if ( panelVideo.isTrackEnabled() == false ) {
                trackControl.setEnabled ( false );
                continue;
            }
            format = panelVideo.getFormat ();
            if ( format == null ) {
                MessageDialog.createErrorDialog ( this.getFrame(), "Internal error. Unable to match choosen video format. Track will be disabled." );
                trackControl.setEnabled ( false );
            }
            else {
                trackControl.setEnabled ( true );
                trackControl.setFormat ( format );
            }
        }

        nCount = vectorPanelsAudio.size ();
        for ( i = 0;  i < nCount;  i++ ) {
            panelAudio = (AudioFormatChooser) vectorPanelsAudio.elementAt ( i );
            trackControl = (TrackControl) vectorTracksAudio.elementAt ( i );

            if ( panelAudio.isTrackEnabled() == false ) {
                trackControl.setEnabled ( false );
                continue;
            }
            format = panelAudio.getFormat ();
            if ( format == null ) {
                MessageDialog.createErrorDialog ( this.getFrame(), "Internal error. Unable to match choosen audio format. Track will be disabled." );
                trackControl.setEnabled ( false );
            }
            else {
                trackControl.setEnabled ( true );
                trackControl.setFormat ( format );
            }
        }
    }

    public boolean[] getEnabledVideoTracks () {
        int                 i;
        int                 nCount;
        VideoFormatChooser  panelVideo;
        boolean             arrResult [];


        nCount = vectorPanelsVideo.size ();
        arrResult = new boolean [ nCount ];
        for ( i = 0;  i < nCount;  i++ ) {
            panelVideo = (VideoFormatChooser) vectorPanelsVideo.elementAt ( i );
            arrResult[i] = panelVideo.isTrackEnabled ();
        }
        return ( arrResult );
    }

    public boolean[] getEnabledAudioTracks () {
        int                 i;
        int                 nCount;
        AudioFormatChooser  panelAudio;
        boolean             arrResult [];


        nCount = vectorPanelsAudio.size ();
        arrResult = new boolean [ nCount ];
        for ( i = 0;  i < nCount;  i++ ) {
            panelAudio = (AudioFormatChooser) vectorPanelsAudio.elementAt ( i );
            arrResult[i] = panelAudio.isTrackEnabled ();
        }