capturedialog.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

/*
 * @(#)CaptureDialog.java	1.1 00/02/10
 *
 * 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.util.Vector;
import java.net.*;
import java.awt.*;
import java.awt.event.*;

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

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.*;
import jmapps.util.*;


public class CaptureDialog extends JMDialog implements ItemListener {

    private JMAppsCfg           cfgJMApps;
    private Vector              vectorDevices = null;
    private Vector              vectorAudioDevices = null;
    private Vector              vectorVideoDevices = null;

    private Panel               panelDevices;
    private Checkbox            checkUseVideo = null;
    private Checkbox            checkUseAudio = null;
    private Choice              comboVideoDevice = null;
    private Choice              comboAudioDevice = null;
    private Panel               panelVideoFormat = null;
    private Panel               panelAudioFormat = null;
    private AudioFormatChooser  chooserAudio = null;
    private VideoFormatChooser  chooserVideo = null;

    private Button              buttonOK;
    private Button              buttonCancel;


    public CaptureDialog ( Frame parentFrame, JMAppsCfg cfgJMApps ) {
        super ( parentFrame, JMFI18N.getResource("jmstudio.capture.title"), true );

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

    public boolean isVideoDeviceUsed () {
        boolean         boolUsed = false;

        if ( checkUseVideo != null )
            boolUsed = checkUseVideo.getState ();
        return ( boolUsed );
    }

    public boolean isAudioDeviceUsed () {
        boolean         boolUsed = false;

        if ( checkUseAudio != null )
            boolUsed = checkUseAudio.getState ();
        return ( boolUsed );
    }

    public CaptureDeviceInfo getVideoDevice () {
        int                     i;
        CaptureDeviceInfo       infoCaptureDevice = null;

        if ( comboVideoDevice != null  &&  isVideoDeviceUsed() ) {
            i = comboVideoDevice.getSelectedIndex ();
            infoCaptureDevice = (CaptureDeviceInfo) vectorVideoDevices.elementAt ( i );
        }
        return ( infoCaptureDevice );
    }

    public CaptureDeviceInfo getAudioDevice () {
        int                     i;
        CaptureDeviceInfo       infoCaptureDevice = null;

        if ( comboAudioDevice != null  &&  isAudioDeviceUsed() ) {
            i = comboAudioDevice.getSelectedIndex ();
            infoCaptureDevice = (CaptureDeviceInfo) vectorAudioDevices.elementAt ( i );
        }
        return ( infoCaptureDevice );
    }

    public VideoFormat getVideoFormat () {
        VideoFormat    format = null;

        if ( chooserVideo != null  &&  isVideoDeviceUsed() )
            format = (VideoFormat) chooserVideo.getFormat ();
        return ( format );
    }

    public AudioFormat getAudioFormat () {
        AudioFormat    format = null;

        if ( chooserAudio != null  &&  isAudioDeviceUsed() )
            format = (AudioFormat) chooserAudio.getFormat ();
        return ( format );
    }

    public DataSource createCaptureDataSource () {
        DataSource          dataSource = null;
        String              audioDeviceName = null;
        String              videoDeviceName = null;
        CaptureDeviceInfo   cdi;

        cdi = getAudioDevice();
        if (cdi != null && isAudioDeviceUsed())
            audioDeviceName = cdi.getName();
        cdi = getVideoDevice();
        if (cdi != null && isVideoDeviceUsed())
            videoDeviceName = cdi.getName();
        dataSource = JMFUtils.createCaptureDataSource(audioDeviceName,
						      getAudioFormat(),
						      videoDeviceName,
						      getVideoFormat());

        return ( dataSource );
    }

    private void init () throws Exception {
        Panel       panel;
        Panel       panelButtons;
        JMPanel     panelContent;
        Label       label;


        this.setLayout ( new BorderLayout() );

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

        vectorDevices = CaptureDeviceManager.getDeviceList ( null );
        if ( vectorDevices == null  ||  vectorDevices.size() < 1 ) {
            label = new Label ( JMFI18N.getResource("jmstudio.capture.nodevices") );
            panelContent.add ( label, BorderLayout.CENTER );
        }
        else {
            panelDevices = new Panel ( new GridLayout(1,0,6,6) );
            panelContent.add ( panelDevices, BorderLayout.CENTER );

            panel = createVideoPanel ();
            if ( panel != null )
                panelDevices.add ( panel );
            panel = createAudioPanel ();
            if ( panel != null )
                panelDevices.add ( panel );
        }

        panel = new JMPanel ( new FlowLayout(FlowLayout.CENTER) );
        panelContent.add ( panel, BorderLayout.SOUTH );
        if ( vectorDevices != null  &&  vectorDevices.size() > 0 )
            panelButtons = createButtonPanel ( new String[] { ACTION_OK, ACTION_CANCEL } );
        else
            panelButtons = createButtonPanel ( new String[] { ACTION_OK } );
        panel.add ( panelButtons );

        this.pack ();
        this.setResizable ( false );
    }

    private Panel createVideoPanel () throws Exception {
        int                 i, j;
        int                 nCount;
        JMPanel             panelVideo;
        JMPanel             panelContent;
        Panel               panel;
        Panel               panelTemp;
        CaptureDeviceInfo   infoCaptureDevice;
        Format              arrFormats [];
        boolean             boolState = true;
        VideoFormat         formatDefault = null;
        String              strDeviceName;
        boolean             boolContains;
        JMAppsCfg.CaptureDeviceData   dataCapture = null;


        nCount = vectorDevices.size ();
        vectorVideoDevices = new Vector ();
        for ( i = 0;  i < nCount;  i++ ) {
            infoCaptureDevice = (CaptureDeviceInfo) vectorDevices.elementAt ( i );
            arrFormats = infoCaptureDevice.getFormats ();
            for ( j = 0;  j < arrFormats.length;  j++ ) {
                if ( arrFormats[j] instanceof VideoFormat ) {
                    vectorVideoDevices.addElement ( infoCaptureDevice );
                    break;
                }
            }
        }

        if ( vectorVideoDevices.isEmpty() )
            return ( null );

        if ( cfgJMApps != null )
            dataCapture = cfgJMApps.getLastCaptureVideoData();
        if ( dataCapture!= null ) {
            boolState = dataCapture.boolUse;
            if ( dataCapture.format instanceof VideoFormat )
                formatDefault = (VideoFormat) dataCapture.format;
        }
        panelVideo = new JMPanel ( new BorderLayout(6,6) );
        panelVideo.setEtchedBorder ();

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

        panelTemp = new Panel ( new BorderLayout(6,6) );
        panel.add ( panelTemp, BorderLayout.NORTH );
        checkUseVideo = new Checkbox ( JMFI18N.getResource("jmstudio.capture.video.usedevice"), boolState );
        checkUseVideo.addItemListener ( this );
        panelTemp.add ( checkUseVideo, BorderLayout.WEST );
        panelTemp = new Panel ( new BorderLayout(6,6) );
        panel.add ( panelTemp, BorderLayout.CENTER );