ZBar bar code reader . http://zbar.sourceforge.net/ ZBar is licensed under the GNU LGPL 2.1 to enable development of both open source and commercial projects.
Dependents: GR-PEACH_Camera_in_barcode levkov_ov7670
LICENSE
The ZBar Bar Code Reader is Copyright (C) 2007-2009 Jeff Brown <spadix@users.sourceforge.net> The QR Code reader is Copyright (C) 1999-2009 Timothy B. Terriberry <tterribe@xiph.org>
You can redistribute this library and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.
This library 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 General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
ISAAC is based on the public domain implementation by Robert J. Jenkins Jr., and is itself public domain.
Portions of the bit stream reader are copyright (C) The Xiph.Org Foundation 1994-2008, and are licensed under a BSD-style license.
The Reed-Solomon decoder is derived from an implementation (C) 1991-1995 Henry Minsky (hqm@ua.com, hqm@ai.mit.edu), and is licensed under the LGPL with permission.
zbar/decoder.c
- Committer:
- RyoheiHagimoto
- Date:
- 2016-04-19
- Revision:
- 1:500d42699c34
- Parent:
- 0:56c5742b9e2b
File content as of revision 1:500d42699c34:
/*------------------------------------------------------------------------ * Copyright 2007-2009 (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 <config.h> #include <stdlib.h> /* malloc, calloc, free */ #include <stdio.h> /* snprintf */ #include <string.h> /* memset, strlen */ #include <zbar.h> #include "decoder.h" #if defined(DEBUG_DECODER) || defined(DEBUG_EAN) || \ defined(DEBUG_CODE39) || defined(DEBUG_I25) || \ defined(DEBUG_CODE128) || defined(DEBUG_QR_FINDER) || \ (defined(DEBUG_PDF417) && (DEBUG_PDF417 >= 4)) # define DEBUG_LEVEL 1 #endif #include "zbar_debug.h" zbar_decoder_t *zbar_decoder_create () { zbar_decoder_t *dcode = calloc(1, sizeof(zbar_decoder_t)); dcode->buf_alloc = BUFFER_MIN; dcode->buf = malloc(dcode->buf_alloc); /* initialize default configs */ #ifdef ENABLE_EAN dcode->ean.enable = 1; dcode->ean.ean13_config = ((1 << ZBAR_CFG_ENABLE) | (1 << ZBAR_CFG_EMIT_CHECK)); dcode->ean.ean8_config = ((1 << ZBAR_CFG_ENABLE) | (1 << ZBAR_CFG_EMIT_CHECK)); dcode->ean.upca_config = 1 << ZBAR_CFG_EMIT_CHECK; dcode->ean.upce_config = 1 << ZBAR_CFG_EMIT_CHECK; dcode->ean.isbn10_config = 1 << ZBAR_CFG_EMIT_CHECK; dcode->ean.isbn13_config = 1 << ZBAR_CFG_EMIT_CHECK; #endif #ifdef ENABLE_I25 dcode->i25.config = 1 << ZBAR_CFG_ENABLE; CFG(dcode->i25, ZBAR_CFG_MIN_LEN) = 6; #endif #ifdef ENABLE_CODE39 dcode->code39.config = 1 << ZBAR_CFG_ENABLE; CFG(dcode->code39, ZBAR_CFG_MIN_LEN) = 1; #endif #ifdef ENABLE_CODE128 dcode->code128.config = 1 << ZBAR_CFG_ENABLE; #endif #ifdef ENABLE_PDF417 dcode->pdf417.config = 1 << ZBAR_CFG_ENABLE; #endif #ifdef ENABLE_QRCODE dcode->qrf.config = 1 << ZBAR_CFG_ENABLE; #endif zbar_decoder_reset(dcode); return(dcode); } void zbar_decoder_destroy (zbar_decoder_t *dcode) { if(dcode->buf) free(dcode->buf); free(dcode); } void zbar_decoder_reset (zbar_decoder_t *dcode) { memset(dcode, 0, (long)&dcode->buf_alloc - (long)dcode); #ifdef ENABLE_EAN ean_reset(&dcode->ean); #endif #ifdef ENABLE_I25 i25_reset(&dcode->i25); #endif #ifdef ENABLE_CODE39 code39_reset(&dcode->code39); #endif #ifdef ENABLE_CODE128 code128_reset(&dcode->code128); #endif #ifdef ENABLE_PDF417 pdf417_reset(&dcode->pdf417); #endif #ifdef ENABLE_QRCODE qr_finder_reset(&dcode->qrf); #endif } void zbar_decoder_new_scan (zbar_decoder_t *dcode) { /* soft reset decoder */ memset(dcode->w, 0, sizeof(dcode->w)); dcode->lock = 0; dcode->idx = 0; #ifdef ENABLE_EAN ean_new_scan(&dcode->ean); #endif #ifdef ENABLE_I25 i25_reset(&dcode->i25); #endif #ifdef ENABLE_CODE39 code39_reset(&dcode->code39); #endif #ifdef ENABLE_CODE128 code128_reset(&dcode->code128); #endif #ifdef ENABLE_PDF417 pdf417_reset(&dcode->pdf417); #endif #ifdef ENABLE_QRCODE qr_finder_reset(&dcode->qrf); #endif } zbar_color_t zbar_decoder_get_color (const zbar_decoder_t *dcode) { return(get_color(dcode)); } const char *zbar_decoder_get_data (const zbar_decoder_t *dcode) { return((char*)dcode->buf); } unsigned int zbar_decoder_get_data_length (const zbar_decoder_t *dcode) { return(dcode->buflen); } zbar_decoder_handler_t * zbar_decoder_set_handler (zbar_decoder_t *dcode, zbar_decoder_handler_t handler) { zbar_decoder_handler_t *result = dcode->handler; dcode->handler = handler; return(result); } void zbar_decoder_set_userdata (zbar_decoder_t *dcode, void *userdata) { dcode->userdata = userdata; } void *zbar_decoder_get_userdata (const zbar_decoder_t *dcode) { return(dcode->userdata); } zbar_symbol_type_t zbar_decoder_get_type (const zbar_decoder_t *dcode) { return(dcode->type); } zbar_symbol_type_t zbar_decode_width (zbar_decoder_t *dcode, unsigned w) { dcode->w[dcode->idx & (DECODE_WINDOW - 1)] = w; dprintf(1, " decode[%x]: w=%d (%g)\n", dcode->idx, w, (w / 32.)); /* each decoder processes width stream in parallel */ zbar_symbol_type_t sym = dcode->type = ZBAR_NONE; #ifdef ENABLE_EAN if((dcode->ean.enable) && (sym = _zbar_decode_ean(dcode))) dcode->type = sym; #endif #ifdef ENABLE_CODE39 if(TEST_CFG(dcode->code39.config, ZBAR_CFG_ENABLE) && (sym = _zbar_decode_code39(dcode)) > ZBAR_PARTIAL) dcode->type = sym; #endif #ifdef ENABLE_CODE128 if(TEST_CFG(dcode->code128.config, ZBAR_CFG_ENABLE) && (sym = _zbar_decode_code128(dcode)) > ZBAR_PARTIAL) dcode->type = sym; #endif #ifdef ENABLE_I25 if(TEST_CFG(dcode->i25.config, ZBAR_CFG_ENABLE) && (sym = _zbar_decode_i25(dcode)) > ZBAR_PARTIAL) dcode->type = sym; #endif #ifdef ENABLE_PDF417 if(TEST_CFG(dcode->pdf417.config, ZBAR_CFG_ENABLE) && (sym = _zbar_decode_pdf417(dcode)) > ZBAR_PARTIAL) dcode->type = sym; #endif #ifdef ENABLE_QRCODE if(TEST_CFG(dcode->qrf.config, ZBAR_CFG_ENABLE) && (sym = _zbar_find_qr(dcode)) > ZBAR_PARTIAL) dcode->type = sym; #endif dcode->idx++; if(dcode->type) { if(dcode->handler) dcode->handler(dcode); if(dcode->lock && dcode->type > ZBAR_PARTIAL) dcode->lock = 0; } return(dcode->type); } static inline int decoder_set_config_bool (zbar_decoder_t *dcode, zbar_symbol_type_t sym, zbar_config_t cfg, int val) { unsigned *config = NULL; switch(sym) { #ifdef ENABLE_EAN case ZBAR_EAN13: config = &dcode->ean.ean13_config; break; case ZBAR_EAN8: config = &dcode->ean.ean8_config; break; case ZBAR_UPCA: config = &dcode->ean.upca_config; break; case ZBAR_UPCE: config = &dcode->ean.upce_config; break; case ZBAR_ISBN10: config = &dcode->ean.isbn10_config; break; case ZBAR_ISBN13: config = &dcode->ean.isbn13_config; break; #endif #ifdef ENABLE_I25 case ZBAR_I25: config = &dcode->i25.config; break; #endif #ifdef ENABLE_CODE39 case ZBAR_CODE39: config = &dcode->code39.config; break; #endif #ifdef ENABLE_CODE128 case ZBAR_CODE128: config = &dcode->code128.config; break; #endif #ifdef ENABLE_PDF417 case ZBAR_PDF417: config = &dcode->pdf417.config; break; #endif #ifdef ENABLE_QRCODE case ZBAR_QRCODE: config = &dcode->qrf.config; break; #endif /* FIXME handle addons */ default: return(1); } if(!config || cfg >= ZBAR_CFG_NUM) return(1); if(!val) *config &= ~(1 << cfg); else if(val == 1) *config |= (1 << cfg); else return(1); #ifdef ENABLE_EAN dcode->ean.enable = TEST_CFG(dcode->ean.ean13_config | dcode->ean.ean8_config | dcode->ean.upca_config | dcode->ean.upce_config | dcode->ean.isbn10_config | dcode->ean.isbn13_config, ZBAR_CFG_ENABLE); #endif return(0); } static inline int decoder_set_config_int (zbar_decoder_t *dcode, zbar_symbol_type_t sym, zbar_config_t cfg, int val) { switch(sym) { #ifdef ENABLE_I25 case ZBAR_I25: CFG(dcode->i25, cfg) = val; break; #endif #ifdef ENABLE_CODE39 case ZBAR_CODE39: CFG(dcode->code39, cfg) = val; break; #endif #ifdef ENABLE_CODE128 case ZBAR_CODE128: CFG(dcode->code128, cfg) = val; break; #endif #ifdef ENABLE_PDF417 case ZBAR_PDF417: CFG(dcode->pdf417, cfg) = val; break; #endif default: return(1); } return(0); } int zbar_decoder_set_config (zbar_decoder_t *dcode, zbar_symbol_type_t sym, zbar_config_t cfg, int val) { if(sym == ZBAR_NONE) { zbar_decoder_set_config(dcode, ZBAR_EAN13, cfg, val); zbar_decoder_set_config(dcode, ZBAR_EAN8, cfg, val); zbar_decoder_set_config(dcode, ZBAR_UPCA, cfg, val); zbar_decoder_set_config(dcode, ZBAR_UPCE, cfg, val); zbar_decoder_set_config(dcode, ZBAR_ISBN10, cfg, val); zbar_decoder_set_config(dcode, ZBAR_ISBN13, cfg, val); zbar_decoder_set_config(dcode, ZBAR_I25, cfg, val); zbar_decoder_set_config(dcode, ZBAR_CODE39, cfg, val); zbar_decoder_set_config(dcode, ZBAR_CODE128, cfg, val); zbar_decoder_set_config(dcode, ZBAR_PDF417, cfg, val); zbar_decoder_set_config(dcode, ZBAR_QRCODE, cfg, val); return(0); } if(cfg >= 0 && cfg < ZBAR_CFG_NUM) return(decoder_set_config_bool(dcode, sym, cfg, val)); else if(cfg >= ZBAR_CFG_MIN_LEN && cfg <= ZBAR_CFG_MAX_LEN) return(decoder_set_config_int(dcode, sym, cfg, val)); else return(1); } static char *decoder_dump = NULL; static unsigned decoder_dumplen = 0; const char *_zbar_decoder_buf_dump (unsigned char *buf, unsigned int buflen) { int dumplen = (buflen * 3) + 12; if(!decoder_dump || dumplen > decoder_dumplen) { if(decoder_dump) free(decoder_dump); decoder_dump = malloc(dumplen); decoder_dumplen = dumplen; } char *p = decoder_dump + snprintf(decoder_dump, 12, "buf[%04x]=", (buflen > 0xffff) ? 0xffff : buflen); int i; for(i = 0; i < buflen; i++) p += snprintf(p, 4, "%s%02x", (i) ? " " : "", buf[i]); return(decoder_dump); }