pure sdk for main
This commit is contained in:
divadiow
@@ -0,0 +1,222 @@
|
||||
/*------------------------------------------------------------------------
|
||||
* Copyright 2008-2010 (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
|
||||
*------------------------------------------------------------------------*/
|
||||
|
||||
#include <zbar_config.h>
|
||||
|
||||
#include <zbar.h>
|
||||
|
||||
#ifdef DEBUG_PDF417
|
||||
# define DEBUG_LEVEL (DEBUG_PDF417)
|
||||
#endif
|
||||
#include "debug.h"
|
||||
#include "decoder.h"
|
||||
|
||||
#include "pdf417_hash.h"
|
||||
|
||||
#define PDF417_STOP 0xbff
|
||||
|
||||
static inline signed short pdf417_decode8 (zbar_decoder_t *dcode)
|
||||
{
|
||||
/* build edge signature of character
|
||||
* from similar edge measurements
|
||||
*/
|
||||
unsigned s = dcode->pdf417.s8;
|
||||
dbprintf(2, " s=%d ", s);
|
||||
if(s < 8)
|
||||
return(-1);
|
||||
|
||||
long sig = 0;
|
||||
signed char e;
|
||||
unsigned char i;
|
||||
for(i = 0; i < 7; i++) {
|
||||
if(get_color(dcode) == ZBAR_SPACE)
|
||||
e = decode_e(get_width(dcode, i) +
|
||||
get_width(dcode, i + 1), s, 17);
|
||||
else
|
||||
e = decode_e(get_width(dcode, 7 - i) +
|
||||
get_width(dcode, 6 - i), s, 17);
|
||||
dbprintf(4, "%x", e);
|
||||
if(e < 0 || e > 8)
|
||||
return(-1);
|
||||
sig = (sig << 3) ^ e;
|
||||
}
|
||||
dbprintf(2, " sig=%06lx", sig);
|
||||
|
||||
/* determine cluster number */
|
||||
int clst = ((sig & 7) - ((sig >> 3) & 7) +
|
||||
((sig >> 12) & 7) - ((sig >> 15) & 7));
|
||||
if(clst < 0)
|
||||
clst += 9;
|
||||
dbprintf(2, " k=%d", clst);
|
||||
zassert(clst >= 0 && clst < 9, -1, "dir=%x sig=%lx k=%x %s\n",
|
||||
dcode->pdf417.direction, sig, clst,
|
||||
_zbar_decoder_buf_dump(dcode->buf, dcode->pdf417.character));
|
||||
|
||||
if(clst != 0 && clst != 3 && clst != 6) {
|
||||
if(get_color(dcode) && clst == 7 && sig == 0x080007)
|
||||
return(PDF417_STOP);
|
||||
return(-1);
|
||||
}
|
||||
|
||||
signed short g[3];
|
||||
sig &= 0x3ffff;
|
||||
g[0] = pdf417_hash[(sig - (sig >> 10)) & PDF417_HASH_MASK];
|
||||
g[1] = pdf417_hash[((sig >> 8) - sig) & PDF417_HASH_MASK];
|
||||
g[2] = pdf417_hash[((sig >> 14) - (sig >> 1)) & PDF417_HASH_MASK];
|
||||
zassert(g[0] >= 0 && g[1] >= 0 && g[2] >= 0, -1,
|
||||
"dir=%x sig=%lx k=%x g0=%03x g1=%03x g2=%03x %s\n",
|
||||
dcode->pdf417.direction, sig, clst, g[0], g[1], g[2],
|
||||
_zbar_decoder_buf_dump(dcode->buf, dcode->pdf417.character));
|
||||
|
||||
unsigned short c = (g[0] + g[1] + g[2]) & PDF417_HASH_MASK;
|
||||
dbprintf(2, " g0=%x g1=%x g2=%x c=%03d(%d)",
|
||||
g[0], g[1], g[2], c & 0x3ff, c >> 10);
|
||||
return(c);
|
||||
}
|
||||
|
||||
static inline signed char pdf417_decode_start(zbar_decoder_t *dcode)
|
||||
{
|
||||
unsigned s = dcode->pdf417.s8;
|
||||
if(s < 8)
|
||||
return(0);
|
||||
|
||||
int ei = decode_e(get_width(dcode, 0) + get_width(dcode, 1), s, 17);
|
||||
int ex = (get_color(dcode) == ZBAR_SPACE) ? 2 : 6;
|
||||
if(ei != ex)
|
||||
return(0);
|
||||
|
||||
ei = decode_e(get_width(dcode, 1) + get_width(dcode, 2), s, 17);
|
||||
if(ei)
|
||||
return(0);
|
||||
|
||||
ei = decode_e(get_width(dcode, 2) + get_width(dcode, 3), s, 17);
|
||||
ex = (get_color(dcode) == ZBAR_SPACE) ? 0 : 2;
|
||||
if(ei != ex)
|
||||
return(0);
|
||||
|
||||
ei = decode_e(get_width(dcode, 3) + get_width(dcode, 4), s, 17);
|
||||
ex = (get_color(dcode) == ZBAR_SPACE) ? 0 : 2;
|
||||
if(ei != ex)
|
||||
return(0);
|
||||
|
||||
ei = decode_e(get_width(dcode, 4) + get_width(dcode, 5), s, 17);
|
||||
if(ei)
|
||||
return(0);
|
||||
|
||||
ei = decode_e(get_width(dcode, 5) + get_width(dcode, 6), s, 17);
|
||||
if(ei)
|
||||
return(0);
|
||||
|
||||
ei = decode_e(get_width(dcode, 6) + get_width(dcode, 7), s, 17);
|
||||
ex = (get_color(dcode) == ZBAR_SPACE) ? 7 : 1;
|
||||
if(ei != ex)
|
||||
return(0);
|
||||
|
||||
ei = decode_e(get_width(dcode, 7) + get_width(dcode, 8), s, 17);
|
||||
ex = (get_color(dcode) == ZBAR_SPACE) ? 8 : 1;
|
||||
|
||||
if(get_color(dcode) == ZBAR_BAR) {
|
||||
/* stop character has extra bar */
|
||||
if(ei != 1)
|
||||
return(0);
|
||||
ei = decode_e(get_width(dcode, 8) + get_width(dcode, 9), s, 17);
|
||||
}
|
||||
|
||||
dbprintf(2, " pdf417[%c]: s=%d",
|
||||
(get_color(dcode)) ? '<' : '>', s);
|
||||
|
||||
/* check quiet zone */
|
||||
if(ei >= 0 && ei < ex) {
|
||||
dbprintf(2, " [invalid quiet]\n");
|
||||
return(0);
|
||||
}
|
||||
|
||||
/* lock shared resources */
|
||||
if(acquire_lock(dcode, ZBAR_PDF417)) {
|
||||
dbprintf(2, " [locked %d]\n", dcode->lock);
|
||||
return(0);
|
||||
}
|
||||
|
||||
pdf417_decoder_t *dcode417 = &dcode->pdf417;
|
||||
dcode417->direction = get_color(dcode);
|
||||
dcode417->element = 0;
|
||||
dcode417->character = 0;
|
||||
|
||||
dbprintf(2, " [valid start]\n");
|
||||
return(ZBAR_PARTIAL);
|
||||
}
|
||||
|
||||
zbar_symbol_type_t _zbar_decode_pdf417 (zbar_decoder_t *dcode)
|
||||
{
|
||||
pdf417_decoder_t *dcode417 = &dcode->pdf417;
|
||||
|
||||
/* update latest character width */
|
||||
dcode417->s8 -= get_width(dcode, 8);
|
||||
dcode417->s8 += get_width(dcode, 0);
|
||||
|
||||
if(dcode417->character < 0) {
|
||||
pdf417_decode_start(dcode);
|
||||
dbprintf(4, "\n");
|
||||
return(0);
|
||||
}
|
||||
|
||||
/* process every 8th element of active symbol */
|
||||
if(++dcode417->element)
|
||||
return(0);
|
||||
dcode417->element = 0;
|
||||
|
||||
dbprintf(2, " pdf417[%c%02d]:",
|
||||
(dcode417->direction) ? '<' : '>', dcode417->character);
|
||||
|
||||
if(get_color(dcode) != dcode417->direction) {
|
||||
int c = dcode417->character;
|
||||
release_lock(dcode, ZBAR_PDF417);
|
||||
dcode417->character = -1;
|
||||
zassert(get_color(dcode) == dcode417->direction, ZBAR_NONE,
|
||||
"color=%x dir=%x char=%d elem=0 %s\n",
|
||||
get_color(dcode), dcode417->direction, c,
|
||||
_zbar_decoder_buf_dump(dcode->buf, c));
|
||||
}
|
||||
|
||||
signed short c = pdf417_decode8(dcode);
|
||||
if(c < 0 || size_buf(dcode, dcode417->character + 1)) {
|
||||
dbprintf(1, (c < 0) ? " [aborted]\n" : " [overflow]\n");
|
||||
release_lock(dcode, ZBAR_PDF417);
|
||||
dcode417->character = -1;
|
||||
return(0);
|
||||
}
|
||||
|
||||
/* FIXME TBD infer dimensions, save codewords */
|
||||
|
||||
if(c == PDF417_STOP) {
|
||||
dbprintf(1, " [valid stop]");
|
||||
/* FIXME check trailing bar and qz */
|
||||
dcode->direction = 1 - 2 * dcode417->direction;
|
||||
dcode->modifiers = 0;
|
||||
release_lock(dcode, ZBAR_PDF417);
|
||||
dcode417->character = -1;
|
||||
}
|
||||
|
||||
dbprintf(2, "\n");
|
||||
return(0);
|
||||
}
|
||||
Reference in New Issue
Block a user