AOO410/main/avmedia/source/java/FrameGrabber.java

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 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
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 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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import com.sun.star.uno.UnoRuntime;
import com.sun.star.uno.XComponentContext;
import com.sun.star.uno.AnyConverter;
import com.sun.star.uno.IQueryInterface;
import com.sun.star.lang.XInitialization;
import com.sun.star.lang.XEventListener;
import com.sun.star.awt.*;
import com.sun.star.media.*;
import com.sun.star.graphic.*;

// -----------------
// - Player Window -
// -----------------

public class FrameGrabber implements com.sun.star.lang.XServiceInfo,
                                     com.sun.star.media.XFrameGrabber
{
    private com.sun.star.lang.XMultiServiceFactory maFactory = null;
    private javax.media.Player maPlayer = null;
    private javax.media.control.FrameGrabbingControl maFrameGrabbingControl = null;

    // -------------------------------------------------------------------------

    public FrameGrabber( com.sun.star.lang.XMultiServiceFactory aFactory, String aURL )
    {
        maFactory = aFactory;
    
        try
        {
            maPlayer = javax.media.Manager.createRealizedPlayer( new java.net.URL( aURL ) );
        }
        catch( java.net.MalformedURLException e )
        {
        }
        catch( java.io.IOException e )
        {
        }
        catch( javax.media.NoPlayerException e )
        {
        }
        catch( javax.media.CannotRealizeException e )
        {
        }
        catch( java.lang.Exception e )
        {
        }
        
        if( maPlayer != null )
        {
            maFrameGrabbingControl = (javax.media.control.FrameGrabbingControl) maPlayer.getControl(
                                        "javax.media.control.FrameGrabbingControl" );
        }
    }
    
    // -------------------------------------------------------------------------

    public com.sun.star.graphic.XGraphic implImageToXGraphic( java.awt.Image aImage )
    {
        com.sun.star.graphic.XGraphic aRet = null;
        
        if( maFactory != null && aImage != null )
        {
            if( aImage instanceof java.awt.image.BufferedImage )
            {
                java.io.File aTempFile = null;
                
                try
                {
                    aTempFile = java.io.File.createTempFile( "sv0", ".png" );
                
                    if( aTempFile.canWrite() )
                    {
                        javax.imageio.ImageIO.write( (java.awt.image.BufferedImage) aImage, "png", aTempFile );
                        
                        com.sun.star.graphic.XGraphicProvider aProvider =
                            (com.sun.star.graphic.XGraphicProvider) UnoRuntime.queryInterface(
                                com.sun.star.graphic.XGraphicProvider.class,
                                maFactory.createInstance("com.sun.star.graphic.GraphicProvider") );
                                
                        if( aProvider != null )
                        {
                            com.sun.star.beans.PropertyValue[] aArgs = new com.sun.star.beans.PropertyValue[ 1 ];

                            aArgs[ 0 ] = new com.sun.star.beans.PropertyValue();
                            aArgs[ 0 ].Name = "URL";
                            aArgs[ 0 ].Value = "file://" + aTempFile.toString();

                            aRet = aProvider.queryGraphic( aArgs );
                        }
                    }
                }
                catch( java.lang.IllegalArgumentException aExcp )
                {
                }
                catch( java.io.IOException aExcp )
                {
                }
                catch( com.sun.star.uno.Exception aExcp )
                {
                }
                
                if( aTempFile != null )
                    aTempFile.delete();
            }
        }
        
        return aRet;
    }
    
    // -----------------
    // - XFrameGrabber -
    // -----------------

    public synchronized com.sun.star.graphic.XGraphic grabFrame( double fMediaTime )
    {
        com.sun.star.graphic.XGraphic aRet = null;
    
        if( maFrameGrabbingControl != null )
        {
            if( fMediaTime >= 0.0 && fMediaTime <= maPlayer.getDuration().getSeconds() )
            {
                maPlayer.setMediaTime( new javax.media.Time( fMediaTime ) );
                
                javax.media.Buffer aBuffer = maFrameGrabbingControl.grabFrame();
                
                if( aBuffer != null && aBuffer.getFormat() instanceof javax.media.format.VideoFormat )
                {
                    aRet = implImageToXGraphic( new javax.media.util.BufferToImage( 
                                                    (javax.media.format.VideoFormat) aBuffer.getFormat() ).
                                                        createImage( aBuffer ) );
                }
            }
        }
        
        return aRet;
    }

    // ----------------
    // - XServiceInfo -
    // ----------------

    private static final String s_implName = "com.sun.star.comp.FrameGrabber_Java";
    private static final String s_serviceName = "com.sun.star.media.FrameGrabber_Java";

    public synchronized String getImplementationName()
    {
        return s_implName;
    }

    // -------------------------------------------------------------------------

    public synchronized String [] getSupportedServiceNames()
    {
        return new String [] { s_serviceName };
    }

    // -------------------------------------------------------------------------

    public synchronized boolean supportsService( String serviceName )
    {
        return serviceName.equals( s_serviceName );
    }
}