saveasdialog.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

/*
 * @(#)SaveAsDialog.java	1.9 00/05/12
 *
 * 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.jmstudio;

import java.lang.*;
import java.lang.reflect.*;
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.PlayerWindow;
import com.sun.media.ui.AudioFormatChooser;
import com.sun.media.ui.VideoFormatChooser;

import jmapps.util.*;
import jmapps.ui.*;


/**
* This class is used to create modeless SaveAs dialog. Instanciating the class
* opens the dialog. It uses TabControl to allow user specify the parameters
* for each audio and video track. Classes TrackPanelAudio and TrackPanelVideo
* are used to compose the pages of the TabControl. When user presses "OK" button
* it calls system FileDialog. After specifying the target file, it creates
* Progress dialog, that allows to monitor the progress of saving media to the
* file, pause, resume and abort the process.
*/
public class SaveAsDialog extends JMDialog implements ControllerListener,
                                                DataSinkListener, ItemListener {

    private JMAppsCfg       cfgJMApps;
    private String          inputURL;
    private DataSource      dataSource = null;
    private Processor       processor = null;
    private DataSink        dataSink = null;
    private TrackControl    arrTrackControls [];
    private int             nAudioTrackCount = 0;
    private int             nVideoTrackCount = 0;
    private String          strContentType = null;
    private String          strContentTypeExt = null;
    private boolean         boolSaving = false;
    private ProgressDialog  dlgProgress = null;
    private ProgressThread  threadProgress = null;
    private Format          captureFormat = null;

    private TabControl      tabControl;
    private Hashtable       hashtablePanelsAudio = new Hashtable ();
    private Hashtable       hashtablePanelsVideo = new Hashtable ();
    private Button          buttonSave;
    private Button          buttonCancel;
    private Choice          comboContentType;

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

    private String          strFailMessage = null;

    private ContentDescriptor []       supportedCDs;

    private static final String    STR_MSVIDEO = JMFI18N.getResource("jmstudio.saveas.type.msvideo");
    private static final String    STR_QUICKTIME = JMFI18N.getResource("jmstudio.saveas.type.quicktime");
    private static final String    STR_AIFF = JMFI18N.getResource("jmstudio.saveas.type.aiff");
    private static final String    STR_GSM = JMFI18N.getResource("jmstudio.saveas.type.gsm");
    private static final String    STR_WAVE = JMFI18N.getResource("jmstudio.saveas.type.wave");
    private static final String    STR_BASIC_AUDIO = JMFI18N.getResource("jmstudio.saveas.type.basicaudio");
    private static final String    STR_MPEG_AUDIO = JMFI18N.getResource("jmstudio.saveas.type.mpegaudio");

    /**
    * This constructor creates object SaveAsDialog, fills it with controls
    * does the layout, displays it on the screen, and returns.
    * The dialog stays on the screen untill user presses button "OK" or "Cancel".
    * @param    frame      parent frame
    * @param    inputURL   source of the media
    * @param    format     possible capture format
    */
    public SaveAsDialog ( Frame frame, String inputURL, Format format, JMAppsCfg cfgJMApps ) {
        super ( frame, JMFI18N.getResource("jmstudio.saveas.title"), false );

        this.cfgJMApps = cfgJMApps;
        this.inputURL = inputURL;
        this.captureFormat = format;

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

    }

    /**
    * This constructor creates object SaveAsDialog, fills it with controls
    * does the layout, displays it on the screen, and returns.
    * The dialog stays on the screen untill user presses button "OK" or "Cancel".
    * @param    frame      parent frame
    * @param    inputURL   source of the media
    * @param    format     possible capture format
    */
    public SaveAsDialog ( Frame frame, DataSource dataSource, JMAppsCfg cfgJMApps ) {
        super ( frame, JMFI18N.getResource("jmstudio.saveas.title"), false );

        this.cfgJMApps = cfgJMApps;
        this.dataSource = dataSource;
        this.inputURL = "Capture";

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

    }

    /**
    * This method is called from the constructor. It performs all required
    * initialization, creates all controls, does the layout and puts the dialog
    * on the screen.
    * @exception    Exception
    */
    private void init () throws Exception {
        int             i;
        Frame           frame;
        Point           point;
        Panel           panel;
        Panel           panelButtons;
        JMPanel         panelBorder;
        MediaLocator    mediaSource;
        Format          format;
        boolean         boolResult;
        Dimension       dim;


        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 );

        frameOwner.setCursor ( new Cursor(Cursor.WAIT_CURSOR) );

        if (dataSource == null) {
            try {
                mediaSource = new MediaLocator ( inputURL );
                dataSource = Manager.createDataSource ( mediaSource );
                // If its a capture datasource, set the format as specified by JMStudio
                if (captureFormat != null && dataSource instanceof CaptureDevice) {
                    FormatControl [] fcs = ((CaptureDevice)dataSource).getFormatControls();
                        if (fcs != null && fcs.length > 0) {
                            fcs[0].setFormat(captureFormat);
                        }
                }
            }
            catch ( Exception exception ) {
                MessageDialog.createErrorDialog ( frameOwner,
						  JMFI18N.getResource("jmstudio.error.datasource.createfor")
						  + " \'" + inputURL + "\'.", exception );
                frameOwner.setCursor ( Cursor.getDefaultCursor() );
                throw exception;
            }
        }

        strContentType = dataSource.getContentType ();
        try {
            processor = Manager.createProcessor ( dataSource );
        }
        catch ( NoPlayerException exception ) {
            MessageDialog.createErrorDialog ( frameOwner,
                        JMFI18N.getResource("jmstudio.error.processor.create"),
                        exception );
            frameOwner.setCursor ( Cursor.getDefaultCursor() );
            throw exception;
        }
        processor.addControllerListener ( this );

        // wait for processor to be configured
        boolResult = waitForState ( processor, Processor.Configured );
        if ( boolResult == false ) {
//            MessageDialog.createErrorDialog ( frameOwner,
//                        JMFI18N.getResource("jmstudio.error.processor.configure")
//                        + "\n" + strFailMessage );
            frameOwner.setCursor ( Cursor.getDefaultCursor() );
            return;
        }

        supportedCDs = processor.getSupportedContentDescriptors();

        arrTrackControls = processor.getTrackControls ();
        for ( i = 0;  i < arrTrackControls.length;  i++ ) {
            format = arrTrackControls[i].getFormat ();
            if ( format instanceof VideoFormat )
                nVideoTrackCount++;
            if ( format instanceof AudioFormat )
                nAudioTrackCount++;
        }

        this.setLayout ( new BorderLayout() );

        panelBorder = new JMPanel ( new BorderLayout(6,6) );
        panelBorder.setEmptyBorder ( 6, 6, 6, 6 );
        panelBorder.setBackground ( Color.lightGray );
        this.add ( panelBorder, BorderLayout.CENTER );

        panel = createPanelGeneral ();
        panelBorder.add ( panel, BorderLayout.NORTH );

        panel = createPanelProperties ();
        panelBorder.add ( panel, BorderLayout.CENTER );

        panel = new JMPanel ( new FlowLayout(FlowLayout.CENTER) );
        panelBorder.add ( panel, BorderLayout.SOUTH );
        panelButtons = createButtonPanel ( new String[] { ACTION_SAVE, ACTION_CANCEL } );
        panel.add ( panelButtons );

        changeContentType ();

        this.pack ();
        dim = this.getSize ();
        dim.width += 64;
        this.setSize ( dim );

        this.addWindowListener ( this );
        this.setResizable ( false );
        this.setVisible ( true );

        frameOwner.setCursor ( Cursor.getDefaultCursor() );
    }

    /**
    * This method is used by method init() to create the panel that contains
    * TabControl and its pages TrackPanelAudio or TrackPanelVideo for each track.
    * @return       created panel
    * @exception    Exception
    */
    private Panel createPanelProperties () throws Exception {
        int                     i;
        int                     nIndexAudio;
        int                     nIndexVideo;
        int                     nCount;
        Panel                   panel;
        TrackPanelAudio         panelAudio;
        TrackPanelVideo         panelVideo;
        Format                  format;
        String                  strTitle;
        String                  strAudio = JMFI18N.getResource("jmstudio.saveas.audio");
        String                  strVideo = JMFI18N.getResource("jmstudio.saveas.video");