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/*------------------------------------------------------------------------
* Symbol
*
* 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;
/** Immutable container for decoded result symbols associated with an image
* or a composite symbol.
*/
public class Symbol
{
/** No symbol decoded. */
public static final int NONE = 0;
/** Symbol detected but not decoded. */
public static final int PARTIAL = 1;
/** EAN-8. */
public static final int EAN8 = 8;
/** UPC-E. */
public static final int UPCE = 9;
/** ISBN-10 (from EAN-13). */
public static final int ISBN10 = 10;
/** UPC-A. */
public static final int UPCA = 12;
/** EAN-13. */
public static final int EAN13 = 13;
/** ISBN-13 (from EAN-13). */
public static final int ISBN13 = 14;
/** Interleaved 2 of 5. */
public static final int I25 = 25;
/** DataBar (RSS-14). */
public static final int DATABAR = 34;
/** DataBar Expanded. */
public static final int DATABAR_EXP = 35;
/** Codabar. */
public static final int CODABAR = 38;
/** Code 39. */
public static final int CODE39 = 39;
/** PDF417. */
public static final int PDF417 = 57;
/** QR Code. */
public static final int QRCODE = 64;
/** Code 93. */
public static final int CODE93 = 93;
/** Code 128. */
public static final int CODE128 = 128;
/** C pointer to a zbar_symbol_t. */
private long peer;
/** Cached attributes. */
private int type;
static
{
System.loadLibrary("zbarjni");
init();
}
private static native void init();
/** Symbols are only created by other package methods. */
Symbol (long peer)
{
this.peer = peer;
}
protected void finalize ()
{
destroy();
}
/** Clean up native data associated with an instance. */
public synchronized void destroy ()
{
if(peer != 0) {
destroy(peer);
peer = 0;
}
}
/** Release the associated peer instance. */
private native void destroy(long peer);
/** Retrieve type of decoded symbol. */
public int getType ()
{
if(type == 0)
type = getType(peer);
return(type);
}
private native int getType(long peer);
/** Retrieve symbology boolean configs settings used during decode. */
public native int getConfigMask();
/** Retrieve symbology characteristics detected during decode. */
public native int getModifierMask();
/** Retrieve data decoded from symbol as a String. */
public native String getData();
/** Retrieve raw data bytes decoded from symbol. */
public native byte[] getDataBytes();
/** Retrieve a symbol confidence metric. Quality is an unscaled,
* relative quantity: larger values are better than smaller
* values, where "large" and "small" are application dependent.
*/
public native int getQuality();
/** Retrieve current cache count. When the cache is enabled for
* the image_scanner this provides inter-frame reliability and
* redundancy information for video streams.
* @returns < 0 if symbol is still uncertain
* @returns 0 if symbol is newly verified
* @returns > 0 for duplicate symbols
*/
public native int getCount();
/** Retrieve an approximate, axis-aligned bounding box for the
* symbol.
*/
public int[] getBounds ()
{
int n = getLocationSize(peer);
if(n <= 0)
return(null);
int[] bounds = new int[4];
int xmin = Integer.MAX_VALUE;
int xmax = Integer.MIN_VALUE;
int ymin = Integer.MAX_VALUE;
int ymax = Integer.MIN_VALUE;
for(int i = 0; i < n; i++) {
int x = getLocationX(peer, i);
if(xmin > x) xmin = x;
if(xmax < x) xmax = x;
int y = getLocationY(peer, i);
if(ymin > y) ymin = y;
if(ymax < y) ymax = y;
}
bounds[0] = xmin;
bounds[1] = ymin;
bounds[2] = xmax - xmin;
bounds[3] = ymax - ymin;
return(bounds);
}
private native int getLocationSize(long peer);
private native int getLocationX(long peer, int idx);
private native int getLocationY(long peer, int idx);
public int[] getLocationPoint (int idx)
{
int[] p = new int[2];
p[0] = getLocationX(peer, idx);
p[1] = getLocationY(peer, idx);
return(p);
}
/** Retrieve general axis-aligned, orientation of decoded
* symbol.
*/
public native int getOrientation();
/** Retrieve components of a composite result. */
public SymbolSet getComponents ()
{
return(new SymbolSet(getComponents(peer)));
}
private native long getComponents(long peer);
native long next();
}
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