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/*------------------------------------------------------------------------
* ImageScanner
*
* Copyright 2007-2010 (c) Jeff Brown <spadix@users.sourceforge.net>
*
* This file is part of the ZBar Bar Code Reader.
*
* The ZBar Bar Code Reader is free software; you can redistribute it
* and/or modify it under the terms of the GNU Lesser Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* The ZBar Bar Code Reader is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser Public License for more details.
*
* You should have received a copy of the GNU Lesser Public License
* along with the ZBar Bar Code Reader; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301 USA
*
* http://sourceforge.net/projects/zbar
*------------------------------------------------------------------------*/
package net.sourceforge.zbar;
/** Read barcodes from 2-D images.
*/
public class ImageScanner
{
/** C pointer to a zbar_image_scanner_t. */
private long peer;
static
{
System.loadLibrary("zbarjni");
init();
}
private static native void init();
public ImageScanner ()
{
peer = create();
}
/** Create an associated peer instance. */
private native long create();
protected void finalize ()
{
destroy();
}
/** Clean up native data associated with an instance. */
public synchronized void destroy ()
{
if(peer != 0) {
destroy(peer);
peer = 0;
}
}
/** Destroy the associated peer instance. */
private native void destroy(long peer);
/** Set config for indicated symbology (0 for all) to specified value.
*/
public native void setConfig(int symbology, int config, int value)
throws IllegalArgumentException;
/** Parse configuration string and apply to image scanner. */
public native void parseConfig(String config);
/** Enable or disable the inter-image result cache (default disabled).
* Mostly useful for scanning video frames, the cache filters duplicate
* results from consecutive images, while adding some consistency
* checking and hysteresis to the results. Invoking this method also
* clears the cache.
*/
public native void enableCache(boolean enable);
/** Retrieve decode results for last scanned image.
* @returns the SymbolSet result container
*/
public SymbolSet getResults ()
{
return(new SymbolSet(getResults(peer)));
}
private native long getResults(long peer);
/** Scan for symbols in provided Image.
* The image format must currently be "Y800" or "GRAY".
* @returns the number of symbols successfully decoded from the image.
*/
public native int scanImage(Image image);
}
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