Olá pessoal,
Já procurei, mas nao encontrei nenhum exemplo ou tutorial de como capturar, num applet, as imagens de minha web cam… alguem tem alguma luz???
Obrigado… :lol:
Allan.
ve ae…
import java.awt.Dimension;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.*;
import java.util.Properties;
import javax.media.*;
import javax.media.control.FormatControl;
import javax.media.format.RGBFormat;
import javax.media.protocol.*;
import javax.media.util.BufferToImage;
/**
* Faz captura de imagens em webcams. Adaptada por Diego R. Drumond.
*
* @author S.Ritter
* @version 1.0 24/01/2002
*/
public class CapturaImagem extends Thread implements ControllerListener
{
/* */
private Properties videoProperties;
/* */
private Object stateLock;
/* */
private Object runLock;
/* */
private Processor deviceProc;
/* */
private PushBufferStream camStream;
/* */
private PushBufferDataSource source;
/* */
private BufferToImage converter;
/* */
private Image currentImage;
/* */
private boolean threadRunning;
/**
*
*/
public CapturaImagem( ) throws CapturaImagemException
{
stateLock = new Object( );
runLock = new Object( );
deviceProc = null;
source = null;
threadRunning = false;
String videoPropFile = System.getProperty( "video.properties", "video.properties" );
setup( videoPropFile );
}
/**
*
*/
public CapturaImagem( String videoPropFile ) throws CapturaImagemException
{
stateLock = new Object( );
runLock = new Object( );
deviceProc = null;
source = null;
threadRunning = false;
setup( videoPropFile );
}
/**
*
*/
private void setup( String videoPropFile ) throws CapturaImagemException
{
videoProperties = new Properties( );
if( videoPropFile != null )
{
try
{
FileInputStream fis = new FileInputStream( new File( videoPropFile ) );
videoProperties.load( fis );
}
catch( IOException ioe )
{
System.out.println( "Unable to access video properties" );
System.out.println( ioe.getMessage( ) );
}
}
Dimension viewSize = null;
int viewDepth = 0;
String cameraDevice = videoProperties.getProperty( "device-name", "vfw:Logitech USB Video Camera:0" );
try
{
String pValue = videoProperties.getProperty( "resolution-x", "160" );
int xRes = Integer.parseInt( pValue );
pValue = videoProperties.getProperty( "resolution-y", "120" );
int yRes = Integer.parseInt( pValue );
viewSize = new Dimension( xRes, yRes );
pValue = videoProperties.getProperty( "colour-depth", "24" );
viewDepth = Integer.parseInt( pValue );
}
catch( NumberFormatException nfe )
{
System.out.println( "Bad numeric value in video properties file" );
System.exit( 1 );
}
CaptureDeviceInfo device = CaptureDeviceManager.getDevice( cameraDevice );
if( device == null )
{
throw new CapturaImagemException( "No device found [ " + cameraDevice + "]" );
}
RGBFormat userFormat = null;
javax.media.Format cfmt[ ] = device.getFormats( );
for( int i = 0; i < cfmt.length; i++ )
{
if( !( cfmt[ i ] instanceof RGBFormat ) )
continue;
userFormat = ( RGBFormat )cfmt[ i ];
Dimension d = userFormat.getSize( );
int bitsPerPixel = userFormat.getBitsPerPixel( );
if( viewSize.equals( d ) && bitsPerPixel == viewDepth )
break;
userFormat = null;
}
if( userFormat == null )
{
throw new CapturaImagemException( "Requested format not supported" );
}
javax.media.MediaLocator loc = device.getLocator( );
if( loc == null )
{
throw new CapturaImagemException( "Unable to get MediaLocator for device" );
}
DataSource formattedSource = null;
try
{
formattedSource = Manager.createDataSource( loc );
}
catch( IOException ioe )
{
throw new CapturaImagemException( "IO Error creating dataSource" );
}
catch( NoDataSourceException ndse )
{
throw new CapturaImagemException( "Unable to create dataSource" );
}
if( !( formattedSource instanceof CaptureDevice ) )
{
throw new CapturaImagemException( "DataSource not a CaptureDevice" );
}
FormatControl fmtControls[ ] = ( ( CaptureDevice )formattedSource ).getFormatControls( );
if( fmtControls == null || fmtControls.length == 0 )
{
throw new CapturaImagemException( "No FormatControl available" );
}
javax.media.Format setFormat = null;
for( int i = 0; i < fmtControls.length; i++ )
{
if( fmtControls[ i ] != null && ( setFormat = fmtControls[ i ].setFormat( userFormat ) ) != null )
break;
}
if( setFormat == null )
{
throw new CapturaImagemException( "Failed to set camera format" );
}
try
{
formattedSource.connect( );
}
catch( IOException ioe )
{
throw new CapturaImagemException( "Unable to connect to DataSource" );
}
try
{
deviceProc = Manager.createProcessor( formattedSource );
}
catch( IOException ioe )
{
throw new CapturaImagemException( "Unable to get Processor for device: " + ioe.getMessage( ) );
}
catch( NoProcessorException npe )
{
throw new CapturaImagemException( "Unable to get Processor for device: " + npe.getMessage( ) );
}
deviceProc.addControllerListener( this );
deviceProc.realize( );
while( deviceProc.getState( ) != 300 )
{
synchronized( stateLock )
{
try
{
stateLock.wait( );
}
catch( InterruptedException ie )
{
throw new CapturaImagemException( "Failed to get to realized state" );
}
}
}
deviceProc.start( );
try
{
source = ( PushBufferDataSource )deviceProc.getDataOutput( );
}
catch( NotRealizedError nre )
{
throw new CapturaImagemException( "Processor not realized" );
}
PushBufferStream streams[ ] = source.getStreams( );
camStream = null;
for( int i = 0; i < streams.length; i++ )
{
if( !( streams[ i ].getFormat( ) instanceof RGBFormat ) )
{
continue;
}
camStream = streams[ i ];
RGBFormat rgbf = ( RGBFormat )streams[ i ].getFormat( );
converter = new BufferToImage( rgbf );
break;
}
System.out.println( "Capture device ready" );
}
/**
*
*/
public Image getImage( )
{
while( !threadRunning )
{
synchronized( runLock )
{
try
{
runLock.wait( );
}
catch( InterruptedException ie ) { }
}
}
return accessInternalImage( null );
}
/**
*
*/
public BufferedImage getBufferedImage( )
{
return ( BufferedImage )getImage( );
}
/**
*
*/
public void run( )
{
System.out.println( "Capture thread starting..." );
Buffer b = new Buffer( );
do
{
do
{
try
{
camStream.read( b );
}
catch( Exception e ) { }
Image i = converter.createImage( b );
accessInternalImage( i );
}
while( threadRunning );
threadRunning = true;
synchronized( runLock )
{
runLock.notifyAll( );
}
}
while( true );
}
/**
*
*/
public void controllerUpdate( ControllerEvent ce )
{
if( ce instanceof RealizeCompleteEvent )
{
synchronized( stateLock )
{
stateLock.notifyAll( );
}
}
}
/**
*
*/
private synchronized Image accessInternalImage( Image image )
{
if( image == null )
{
return currentImage;
}
else
{
currentImage = image;
return null;
}
}
}video.properties
device-name=vfw:Microsoft WDM Image Capture (Win32):1
resolution-x=320
resolution-y=240
colour-depth=24