Ryo Hagimoto
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/ean.c@1:500d42699c34, 2016-04-19 (annotated)
- Committer:
- RyoheiHagimoto
- Date:
- Tue Apr 19 02:19:39 2016 +0000
- Revision:
- 1:500d42699c34
- Parent:
- 0:56c5742b9e2b
Add copying.txt and license.txt
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| RyoheiHagimoto | 0:56c5742b9e2b | 1 | /*------------------------------------------------------------------------ |
| RyoheiHagimoto | 0:56c5742b9e2b | 2 | * Copyright 2007-2009 (c) Jeff Brown <spadix@users.sourceforge.net> |
| RyoheiHagimoto | 0:56c5742b9e2b | 3 | * |
| RyoheiHagimoto | 0:56c5742b9e2b | 4 | * This file is part of the ZBar Bar Code Reader. |
| RyoheiHagimoto | 0:56c5742b9e2b | 5 | * |
| RyoheiHagimoto | 0:56c5742b9e2b | 6 | * The ZBar Bar Code Reader is free software; you can redistribute it |
| RyoheiHagimoto | 0:56c5742b9e2b | 7 | * and/or modify it under the terms of the GNU Lesser Public License as |
| RyoheiHagimoto | 0:56c5742b9e2b | 8 | * published by the Free Software Foundation; either version 2.1 of |
| RyoheiHagimoto | 0:56c5742b9e2b | 9 | * the License, or (at your option) any later version. |
| RyoheiHagimoto | 0:56c5742b9e2b | 10 | * |
| RyoheiHagimoto | 0:56c5742b9e2b | 11 | * The ZBar Bar Code Reader is distributed in the hope that it will be |
| RyoheiHagimoto | 0:56c5742b9e2b | 12 | * useful, but WITHOUT ANY WARRANTY; without even the implied warranty |
| RyoheiHagimoto | 0:56c5742b9e2b | 13 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| RyoheiHagimoto | 0:56c5742b9e2b | 14 | * GNU Lesser Public License for more details. |
| RyoheiHagimoto | 0:56c5742b9e2b | 15 | * |
| RyoheiHagimoto | 0:56c5742b9e2b | 16 | * You should have received a copy of the GNU Lesser Public License |
| RyoheiHagimoto | 0:56c5742b9e2b | 17 | * along with the ZBar Bar Code Reader; if not, write to the Free |
| RyoheiHagimoto | 0:56c5742b9e2b | 18 | * Software Foundation, Inc., 51 Franklin St, Fifth Floor, |
| RyoheiHagimoto | 0:56c5742b9e2b | 19 | * Boston, MA 02110-1301 USA |
| RyoheiHagimoto | 0:56c5742b9e2b | 20 | * |
| RyoheiHagimoto | 0:56c5742b9e2b | 21 | * http://sourceforge.net/projects/zbar |
| RyoheiHagimoto | 0:56c5742b9e2b | 22 | *------------------------------------------------------------------------*/ |
| RyoheiHagimoto | 0:56c5742b9e2b | 23 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 24 | #include <config.h> |
| RyoheiHagimoto | 0:56c5742b9e2b | 25 | #include <zbar.h> |
| RyoheiHagimoto | 0:56c5742b9e2b | 26 | #include "decoder.h" |
| RyoheiHagimoto | 0:56c5742b9e2b | 27 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 28 | #ifdef DEBUG_EAN |
| RyoheiHagimoto | 0:56c5742b9e2b | 29 | # define DEBUG_LEVEL (DEBUG_EAN) |
| RyoheiHagimoto | 0:56c5742b9e2b | 30 | #endif |
| RyoheiHagimoto | 0:56c5742b9e2b | 31 | #include "zbar_debug.h" |
| RyoheiHagimoto | 0:56c5742b9e2b | 32 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 33 | /* partial decode symbol location */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 34 | typedef enum symbol_partial_e { |
| RyoheiHagimoto | 0:56c5742b9e2b | 35 | EAN_LEFT = 0x0000, |
| RyoheiHagimoto | 0:56c5742b9e2b | 36 | EAN_RIGHT = 0x1000, |
| RyoheiHagimoto | 0:56c5742b9e2b | 37 | } symbol_partial_t; |
| RyoheiHagimoto | 0:56c5742b9e2b | 38 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 39 | /* convert compact encoded D2E1E2 to character (bit4 is parity) */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 40 | static const unsigned char digits[] = { /* E1 E2 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 41 | 0x06, 0x10, 0x04, 0x13, /* 2 2-5 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 42 | 0x19, 0x08, 0x11, 0x05, /* 3 2-5 (d2 <= thr) */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 43 | 0x09, 0x12, 0x07, 0x15, /* 4 2-5 (d2 <= thr) */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 44 | 0x16, 0x00, 0x14, 0x03, /* 5 2-5 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 45 | 0x18, 0x01, 0x02, 0x17, /* E1E2=43,44,33,34 (d2 > thr) */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 46 | }; |
| RyoheiHagimoto | 0:56c5742b9e2b | 47 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 48 | static const unsigned char parity_decode[] = { |
| RyoheiHagimoto | 0:56c5742b9e2b | 49 | 0xf0, /* [xx] BBBBBB = RIGHT half EAN-13 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 50 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 51 | /* UPC-E check digit encoding */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 52 | 0xff, |
| RyoheiHagimoto | 0:56c5742b9e2b | 53 | 0xff, |
| RyoheiHagimoto | 0:56c5742b9e2b | 54 | 0x0f, /* [07] BBBAAA = 0 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 55 | 0xff, |
| RyoheiHagimoto | 0:56c5742b9e2b | 56 | 0x1f, /* [0b] BBABAA = 1 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 57 | 0x2f, /* [0d] BBAABA = 2 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 58 | 0xf3, /* [0e] BBAAAB = 3 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 59 | 0xff, |
| RyoheiHagimoto | 0:56c5742b9e2b | 60 | 0x4f, /* [13] BABBAA = 4 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 61 | 0x7f, /* [15] BABABA = 7 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 62 | 0xf8, /* [16] BABAAB = 8 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 63 | 0x5f, /* [19] BAABBA = 5 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 64 | 0xf9, /* [1a] BAABAB = 9 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 65 | 0xf6, /* [1c] BAAABB = 6 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 66 | 0xff, |
| RyoheiHagimoto | 0:56c5742b9e2b | 67 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 68 | /* LEFT half EAN-13 leading digit */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 69 | 0xff, |
| RyoheiHagimoto | 0:56c5742b9e2b | 70 | 0x6f, /* [23] ABBBAA = 6 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 71 | 0x9f, /* [25] ABBABA = 9 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 72 | 0xf5, /* [26] ABBAAB = 5 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 73 | 0x8f, /* [29] ABABBA = 8 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 74 | 0xf7, /* [2a] ABABAB = 7 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 75 | 0xf4, /* [2c] ABAABB = 4 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 76 | 0xff, |
| RyoheiHagimoto | 0:56c5742b9e2b | 77 | 0x3f, /* [31] AABBBA = 3 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 78 | 0xf2, /* [32] AABBAB = 2 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 79 | 0xf1, /* [34] AABABB = 1 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 80 | 0xff, |
| RyoheiHagimoto | 0:56c5742b9e2b | 81 | 0xff, |
| RyoheiHagimoto | 0:56c5742b9e2b | 82 | 0xff, |
| RyoheiHagimoto | 0:56c5742b9e2b | 83 | 0xff, |
| RyoheiHagimoto | 0:56c5742b9e2b | 84 | 0x0f, /* [3f] AAAAAA = 0 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 85 | }; |
| RyoheiHagimoto | 0:56c5742b9e2b | 86 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 87 | #ifdef DEBUG_EAN |
| RyoheiHagimoto | 0:56c5742b9e2b | 88 | static unsigned char debug_buf[0x18]; |
| RyoheiHagimoto | 0:56c5742b9e2b | 89 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 90 | static inline const unsigned char *dsprintbuf(ean_decoder_t *ean) |
| RyoheiHagimoto | 0:56c5742b9e2b | 91 | { |
| RyoheiHagimoto | 0:56c5742b9e2b | 92 | int i; |
| RyoheiHagimoto | 0:56c5742b9e2b | 93 | for(i = 0; i < 7; i++) |
| RyoheiHagimoto | 0:56c5742b9e2b | 94 | debug_buf[i] = ((ean->buf[0] < 0 || ean->buf[i] < 0) |
| RyoheiHagimoto | 0:56c5742b9e2b | 95 | ? '-' |
| RyoheiHagimoto | 0:56c5742b9e2b | 96 | : ean->buf[i] + '0'); |
| RyoheiHagimoto | 0:56c5742b9e2b | 97 | debug_buf[i] = ' '; |
| RyoheiHagimoto | 0:56c5742b9e2b | 98 | for(; i < 13; i++) |
| RyoheiHagimoto | 0:56c5742b9e2b | 99 | debug_buf[i + 1] = ((ean->buf[7] < 0 || ean->buf[i] < 0) |
| RyoheiHagimoto | 0:56c5742b9e2b | 100 | ? '-' |
| RyoheiHagimoto | 0:56c5742b9e2b | 101 | : ean->buf[i] + '0'); |
| RyoheiHagimoto | 0:56c5742b9e2b | 102 | debug_buf[i + 1] = ' '; |
| RyoheiHagimoto | 0:56c5742b9e2b | 103 | for(; i < 18; i++) |
| RyoheiHagimoto | 0:56c5742b9e2b | 104 | debug_buf[i + 2] = ((ean->buf[13] < 0 || ean->buf[i] < 0) |
| RyoheiHagimoto | 0:56c5742b9e2b | 105 | ? '-' |
| RyoheiHagimoto | 0:56c5742b9e2b | 106 | : ean->buf[i] + '0'); |
| RyoheiHagimoto | 0:56c5742b9e2b | 107 | debug_buf[i + 2] = '\0'; |
| RyoheiHagimoto | 0:56c5742b9e2b | 108 | return(debug_buf); |
| RyoheiHagimoto | 0:56c5742b9e2b | 109 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 110 | #endif |
| RyoheiHagimoto | 0:56c5742b9e2b | 111 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 112 | /* evaluate previous N (>= 2) widths as auxiliary pattern, |
| RyoheiHagimoto | 0:56c5742b9e2b | 113 | * using preceding 4 as character width |
| RyoheiHagimoto | 0:56c5742b9e2b | 114 | */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 115 | static inline signed char aux_end (zbar_decoder_t *dcode, |
| RyoheiHagimoto | 0:56c5742b9e2b | 116 | unsigned char fwd) |
| RyoheiHagimoto | 0:56c5742b9e2b | 117 | { |
| RyoheiHagimoto | 0:56c5742b9e2b | 118 | /* reference width from previous character */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 119 | unsigned s = calc_s(dcode, 4 + fwd, 4); |
| RyoheiHagimoto | 0:56c5742b9e2b | 120 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 121 | /* check quiet zone */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 122 | unsigned qz = get_width(dcode, 0); |
| RyoheiHagimoto | 0:56c5742b9e2b | 123 | if(!fwd && qz && qz < s * 3 / 4) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 124 | dprintf(2, " [invalid quiet]"); |
| RyoheiHagimoto | 0:56c5742b9e2b | 125 | return(-1); |
| RyoheiHagimoto | 0:56c5742b9e2b | 126 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 127 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 128 | dprintf(2, " ("); |
| RyoheiHagimoto | 0:56c5742b9e2b | 129 | signed char code = 0; |
| RyoheiHagimoto | 0:56c5742b9e2b | 130 | unsigned char i; |
| RyoheiHagimoto | 0:56c5742b9e2b | 131 | for(i = 1 - fwd; i < 3 + fwd; i++) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 132 | unsigned e = get_width(dcode, i) + get_width(dcode, i + 1); |
| RyoheiHagimoto | 0:56c5742b9e2b | 133 | dprintf(2, " %d", e); |
| RyoheiHagimoto | 0:56c5742b9e2b | 134 | code = (code << 2) | decode_e(e, s, 7); |
| RyoheiHagimoto | 0:56c5742b9e2b | 135 | if(code < 0) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 136 | dprintf(2, " [invalid end guard]"); |
| RyoheiHagimoto | 0:56c5742b9e2b | 137 | return(-1); |
| RyoheiHagimoto | 0:56c5742b9e2b | 138 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 139 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 140 | dprintf(2, ") s=%d aux=%x", s, code); |
| RyoheiHagimoto | 0:56c5742b9e2b | 141 | return(code); |
| RyoheiHagimoto | 0:56c5742b9e2b | 142 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 143 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 144 | /* determine possible auxiliary pattern |
| RyoheiHagimoto | 0:56c5742b9e2b | 145 | * using current 4 as possible character |
| RyoheiHagimoto | 0:56c5742b9e2b | 146 | */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 147 | static inline signed char aux_start (zbar_decoder_t *dcode) |
| RyoheiHagimoto | 0:56c5742b9e2b | 148 | { |
| RyoheiHagimoto | 0:56c5742b9e2b | 149 | /* FIXME NB add-on has no guard in reverse */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 150 | unsigned e2 = get_width(dcode, 5) + get_width(dcode, 6); |
| RyoheiHagimoto | 0:56c5742b9e2b | 151 | if(decode_e(e2, dcode->ean.s4, 7)) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 152 | dprintf(2, " [invalid any]"); |
| RyoheiHagimoto | 0:56c5742b9e2b | 153 | return(/*FIXME (get_color(dcode) == ZBAR_SPACE) ? STATE_ADDON : */-1); |
| RyoheiHagimoto | 0:56c5742b9e2b | 154 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 155 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 156 | unsigned e1 = get_width(dcode, 4) + get_width(dcode, 5); |
| RyoheiHagimoto | 0:56c5742b9e2b | 157 | unsigned char E1 = decode_e(e1, dcode->ean.s4, 7); |
| RyoheiHagimoto | 0:56c5742b9e2b | 158 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 159 | if(get_color(dcode) == ZBAR_BAR) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 160 | /* check for quiet-zone */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 161 | unsigned qz = get_width(dcode, 7); |
| RyoheiHagimoto | 0:56c5742b9e2b | 162 | if(!qz || qz >= dcode->ean.s4 * 3 / 4) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 163 | if(!E1) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 164 | dprintf(2, " [valid normal]"); |
| RyoheiHagimoto | 0:56c5742b9e2b | 165 | return(0); /* normal symbol start */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 166 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 167 | else if(E1 == 1) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 168 | dprintf(2, " [valid add-on]"); |
| RyoheiHagimoto | 0:56c5742b9e2b | 169 | return(STATE_ADDON); /* add-on symbol start */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 170 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 171 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 172 | dprintf(2, " [invalid start]"); |
| RyoheiHagimoto | 0:56c5742b9e2b | 173 | return(-1); |
| RyoheiHagimoto | 0:56c5742b9e2b | 174 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 175 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 176 | if(!E1) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 177 | /* attempting decode from SPACE => validate center guard */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 178 | unsigned e3 = get_width(dcode, 6) + get_width(dcode, 7); |
| RyoheiHagimoto | 0:56c5742b9e2b | 179 | if(!decode_e(e3, dcode->ean.s4, 7)) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 180 | dprintf(2, " [valid center]"); |
| RyoheiHagimoto | 0:56c5742b9e2b | 181 | return(0); /* start after center guard */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 182 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 183 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 184 | dprintf(2, " [invalid center]"); |
| RyoheiHagimoto | 0:56c5742b9e2b | 185 | return(/*STATE_ADDON*/-1); |
| RyoheiHagimoto | 0:56c5742b9e2b | 186 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 187 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 188 | /* attempt to decode previous 4 widths (2 bars and 2 spaces) as a character */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 189 | static inline signed char decode4 (zbar_decoder_t *dcode) |
| RyoheiHagimoto | 0:56c5742b9e2b | 190 | { |
| RyoheiHagimoto | 0:56c5742b9e2b | 191 | /* calculate similar edge measurements */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 192 | unsigned e1 = ((get_color(dcode) == ZBAR_BAR) |
| RyoheiHagimoto | 0:56c5742b9e2b | 193 | ? get_width(dcode, 0) + get_width(dcode, 1) |
| RyoheiHagimoto | 0:56c5742b9e2b | 194 | : get_width(dcode, 2) + get_width(dcode, 3)); |
| RyoheiHagimoto | 0:56c5742b9e2b | 195 | unsigned e2 = get_width(dcode, 1) + get_width(dcode, 2); |
| RyoheiHagimoto | 0:56c5742b9e2b | 196 | dprintf(2, "\n e1=%d e2=%d", e1, e2); |
| RyoheiHagimoto | 0:56c5742b9e2b | 197 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 198 | /* create compacted encoding for direct lookup */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 199 | signed char code = ((decode_e(e1, dcode->ean.s4, 7) << 2) | |
| RyoheiHagimoto | 0:56c5742b9e2b | 200 | decode_e(e2, dcode->ean.s4, 7)); |
| RyoheiHagimoto | 0:56c5742b9e2b | 201 | if(code < 0) |
| RyoheiHagimoto | 0:56c5742b9e2b | 202 | return(-1); |
| RyoheiHagimoto | 0:56c5742b9e2b | 203 | dprintf(2, " code=%x", code); |
| RyoheiHagimoto | 0:56c5742b9e2b | 204 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 205 | /* 4 combinations require additional determinant (D2) |
| RyoheiHagimoto | 0:56c5742b9e2b | 206 | E1E2 == 34 (0110) |
| RyoheiHagimoto | 0:56c5742b9e2b | 207 | E1E2 == 43 (1001) |
| RyoheiHagimoto | 0:56c5742b9e2b | 208 | E1E2 == 33 (0101) |
| RyoheiHagimoto | 0:56c5742b9e2b | 209 | E1E2 == 44 (1010) |
| RyoheiHagimoto | 0:56c5742b9e2b | 210 | */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 211 | if((1 << code) & 0x0660) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 212 | /* use sum of bar widths */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 213 | unsigned d2 = ((get_color(dcode) == ZBAR_BAR) |
| RyoheiHagimoto | 0:56c5742b9e2b | 214 | ? get_width(dcode, 0) + get_width(dcode, 2) |
| RyoheiHagimoto | 0:56c5742b9e2b | 215 | : get_width(dcode, 1) + get_width(dcode, 3)); |
| RyoheiHagimoto | 0:56c5742b9e2b | 216 | d2 *= 7; |
| RyoheiHagimoto | 0:56c5742b9e2b | 217 | unsigned char mid = (((1 << code) & 0x0420) |
| RyoheiHagimoto | 0:56c5742b9e2b | 218 | ? 3 /* E1E2 in 33,44 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 219 | : 4); /* E1E2 in 34,43 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 220 | unsigned char alt = d2 > (mid * dcode->ean.s4); |
| RyoheiHagimoto | 0:56c5742b9e2b | 221 | if(alt) |
| RyoheiHagimoto | 0:56c5742b9e2b | 222 | code = ((code >> 1) & 3) | 0x10; /* compress code space */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 223 | dprintf(2, " (d2=%d(%d) alt=%d)", d2, mid * dcode->ean.s4, alt); |
| RyoheiHagimoto | 0:56c5742b9e2b | 224 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 225 | dprintf(2, " char=%02x", digits[(unsigned char)code]); |
| RyoheiHagimoto | 0:56c5742b9e2b | 226 | zassert(code < 0x14, -1, "code=%02x e1=%x e2=%x s4=%x color=%x\n", |
| RyoheiHagimoto | 0:56c5742b9e2b | 227 | code, e1, e2, dcode->ean.s4, get_color(dcode)); |
| RyoheiHagimoto | 0:56c5742b9e2b | 228 | return(code); |
| RyoheiHagimoto | 0:56c5742b9e2b | 229 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 230 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 231 | static inline zbar_symbol_type_t ean_part_end4 (ean_pass_t *pass, |
| RyoheiHagimoto | 0:56c5742b9e2b | 232 | unsigned char fwd) |
| RyoheiHagimoto | 0:56c5742b9e2b | 233 | { |
| RyoheiHagimoto | 0:56c5742b9e2b | 234 | /* extract parity bits */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 235 | unsigned char par = ((pass->raw[1] & 0x10) >> 1 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 236 | (pass->raw[2] & 0x10) >> 2 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 237 | (pass->raw[3] & 0x10) >> 3 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 238 | (pass->raw[4] & 0x10) >> 4); |
| RyoheiHagimoto | 0:56c5742b9e2b | 239 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 240 | dprintf(2, " par=%x", par); |
| RyoheiHagimoto | 0:56c5742b9e2b | 241 | if(par && par != 0xf) |
| RyoheiHagimoto | 0:56c5742b9e2b | 242 | /* invalid parity combination */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 243 | return(ZBAR_NONE); |
| RyoheiHagimoto | 0:56c5742b9e2b | 244 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 245 | if(!par == fwd) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 246 | /* reverse sampled digits */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 247 | unsigned char tmp = pass->raw[1]; |
| RyoheiHagimoto | 0:56c5742b9e2b | 248 | pass->raw[1] = pass->raw[4]; |
| RyoheiHagimoto | 0:56c5742b9e2b | 249 | pass->raw[4] = tmp; |
| RyoheiHagimoto | 0:56c5742b9e2b | 250 | tmp = pass->raw[2]; |
| RyoheiHagimoto | 0:56c5742b9e2b | 251 | pass->raw[2] = pass->raw[3]; |
| RyoheiHagimoto | 0:56c5742b9e2b | 252 | pass->raw[3] = tmp; |
| RyoheiHagimoto | 0:56c5742b9e2b | 253 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 254 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 255 | dprintf(2, "\n"); |
| RyoheiHagimoto | 0:56c5742b9e2b | 256 | dprintf(1, "decode4=%x%x%x%x\n", |
| RyoheiHagimoto | 0:56c5742b9e2b | 257 | pass->raw[1] & 0xf, pass->raw[2] & 0xf, |
| RyoheiHagimoto | 0:56c5742b9e2b | 258 | pass->raw[3] & 0xf, pass->raw[4] & 0xf); |
| RyoheiHagimoto | 0:56c5742b9e2b | 259 | if(!par) |
| RyoheiHagimoto | 0:56c5742b9e2b | 260 | return(ZBAR_EAN8 | EAN_RIGHT); |
| RyoheiHagimoto | 0:56c5742b9e2b | 261 | return(ZBAR_EAN8 | EAN_LEFT); |
| RyoheiHagimoto | 0:56c5742b9e2b | 262 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 263 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 264 | static inline zbar_symbol_type_t ean_part_end7 (ean_decoder_t *ean, |
| RyoheiHagimoto | 0:56c5742b9e2b | 265 | ean_pass_t *pass, |
| RyoheiHagimoto | 0:56c5742b9e2b | 266 | unsigned char fwd) |
| RyoheiHagimoto | 0:56c5742b9e2b | 267 | { |
| RyoheiHagimoto | 0:56c5742b9e2b | 268 | /* calculate parity index */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 269 | unsigned char par = ((fwd) |
| RyoheiHagimoto | 0:56c5742b9e2b | 270 | ? ((pass->raw[1] & 0x10) << 1 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 271 | (pass->raw[2] & 0x10) | |
| RyoheiHagimoto | 0:56c5742b9e2b | 272 | (pass->raw[3] & 0x10) >> 1 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 273 | (pass->raw[4] & 0x10) >> 2 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 274 | (pass->raw[5] & 0x10) >> 3 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 275 | (pass->raw[6] & 0x10) >> 4) |
| RyoheiHagimoto | 0:56c5742b9e2b | 276 | : ((pass->raw[1] & 0x10) >> 4 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 277 | (pass->raw[2] & 0x10) >> 3 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 278 | (pass->raw[3] & 0x10) >> 2 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 279 | (pass->raw[4] & 0x10) >> 1 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 280 | (pass->raw[5] & 0x10) | |
| RyoheiHagimoto | 0:56c5742b9e2b | 281 | (pass->raw[6] & 0x10) << 1)); |
| RyoheiHagimoto | 0:56c5742b9e2b | 282 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 283 | /* lookup parity combination */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 284 | pass->raw[0] = parity_decode[par >> 1]; |
| RyoheiHagimoto | 0:56c5742b9e2b | 285 | if(par & 1) |
| RyoheiHagimoto | 0:56c5742b9e2b | 286 | pass->raw[0] >>= 4; |
| RyoheiHagimoto | 0:56c5742b9e2b | 287 | pass->raw[0] &= 0xf; |
| RyoheiHagimoto | 0:56c5742b9e2b | 288 | dprintf(2, " par=%02x(%x)", par, pass->raw[0]); |
| RyoheiHagimoto | 0:56c5742b9e2b | 289 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 290 | if(pass->raw[0] == 0xf) |
| RyoheiHagimoto | 0:56c5742b9e2b | 291 | /* invalid parity combination */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 292 | return(ZBAR_NONE); |
| RyoheiHagimoto | 0:56c5742b9e2b | 293 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 294 | if(!par == fwd) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 295 | /* reverse sampled digits */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 296 | unsigned char i; |
| RyoheiHagimoto | 0:56c5742b9e2b | 297 | for(i = 1; i < 4; i++) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 298 | unsigned char tmp = pass->raw[i]; |
| RyoheiHagimoto | 0:56c5742b9e2b | 299 | pass->raw[i] = pass->raw[7 - i]; |
| RyoheiHagimoto | 0:56c5742b9e2b | 300 | pass->raw[7 - i] = tmp; |
| RyoheiHagimoto | 0:56c5742b9e2b | 301 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 302 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 303 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 304 | dprintf(2, "\n"); |
| RyoheiHagimoto | 0:56c5742b9e2b | 305 | dprintf(1, "decode=%x%x%x%x%x%x%x(%02x)\n", |
| RyoheiHagimoto | 0:56c5742b9e2b | 306 | pass->raw[0] & 0xf, pass->raw[1] & 0xf, |
| RyoheiHagimoto | 0:56c5742b9e2b | 307 | pass->raw[2] & 0xf, pass->raw[3] & 0xf, |
| RyoheiHagimoto | 0:56c5742b9e2b | 308 | pass->raw[4] & 0xf, pass->raw[5] & 0xf, |
| RyoheiHagimoto | 0:56c5742b9e2b | 309 | pass->raw[6] & 0xf, par); |
| RyoheiHagimoto | 0:56c5742b9e2b | 310 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 311 | if(TEST_CFG(ean->ean13_config, ZBAR_CFG_ENABLE)) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 312 | if(!par) |
| RyoheiHagimoto | 0:56c5742b9e2b | 313 | return(ZBAR_EAN13 | EAN_RIGHT); |
| RyoheiHagimoto | 0:56c5742b9e2b | 314 | if(par & 0x20) |
| RyoheiHagimoto | 0:56c5742b9e2b | 315 | return(ZBAR_EAN13 | EAN_LEFT); |
| RyoheiHagimoto | 0:56c5742b9e2b | 316 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 317 | if(par && !(par & 0x20)) |
| RyoheiHagimoto | 0:56c5742b9e2b | 318 | return(ZBAR_UPCE); |
| RyoheiHagimoto | 0:56c5742b9e2b | 319 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 320 | return(ZBAR_NONE); |
| RyoheiHagimoto | 0:56c5742b9e2b | 321 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 322 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 323 | /* update state for one of 4 parallel passes */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 324 | static inline zbar_symbol_type_t decode_pass (zbar_decoder_t *dcode, |
| RyoheiHagimoto | 0:56c5742b9e2b | 325 | ean_pass_t *pass) |
| RyoheiHagimoto | 0:56c5742b9e2b | 326 | { |
| RyoheiHagimoto | 0:56c5742b9e2b | 327 | pass->state++; |
| RyoheiHagimoto | 0:56c5742b9e2b | 328 | unsigned char idx = pass->state & STATE_IDX; |
| RyoheiHagimoto | 0:56c5742b9e2b | 329 | unsigned char fwd = pass->state & 1; |
| RyoheiHagimoto | 0:56c5742b9e2b | 330 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 331 | if(get_color(dcode) == ZBAR_SPACE && |
| RyoheiHagimoto | 0:56c5742b9e2b | 332 | (idx == 0x10 || idx == 0x11) && |
| RyoheiHagimoto | 0:56c5742b9e2b | 333 | TEST_CFG(dcode->ean.ean8_config, ZBAR_CFG_ENABLE) && |
| RyoheiHagimoto | 0:56c5742b9e2b | 334 | !aux_end(dcode, fwd)) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 335 | dprintf(2, " fwd=%x", fwd); |
| RyoheiHagimoto | 0:56c5742b9e2b | 336 | zbar_symbol_type_t part = ean_part_end4(pass, fwd); |
| RyoheiHagimoto | 0:56c5742b9e2b | 337 | pass->state = -1; |
| RyoheiHagimoto | 0:56c5742b9e2b | 338 | return(part); |
| RyoheiHagimoto | 0:56c5742b9e2b | 339 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 340 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 341 | if(!(idx & 0x03) && idx <= 0x14) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 342 | if(!dcode->ean.s4) |
| RyoheiHagimoto | 0:56c5742b9e2b | 343 | return(0); |
| RyoheiHagimoto | 0:56c5742b9e2b | 344 | /* validate guard bars before decoding first char of symbol */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 345 | if(!pass->state) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 346 | pass->state = aux_start(dcode); |
| RyoheiHagimoto | 0:56c5742b9e2b | 347 | if(pass->state < 0) |
| RyoheiHagimoto | 0:56c5742b9e2b | 348 | return(0); |
| RyoheiHagimoto | 0:56c5742b9e2b | 349 | idx = pass->state & STATE_IDX; |
| RyoheiHagimoto | 0:56c5742b9e2b | 350 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 351 | signed char code = decode4(dcode); |
| RyoheiHagimoto | 0:56c5742b9e2b | 352 | if(code < 0) |
| RyoheiHagimoto | 0:56c5742b9e2b | 353 | pass->state = -1; |
| RyoheiHagimoto | 0:56c5742b9e2b | 354 | else { |
| RyoheiHagimoto | 0:56c5742b9e2b | 355 | dprintf(2, "\n raw[%x]=%02x =>", idx >> 2, |
| RyoheiHagimoto | 0:56c5742b9e2b | 356 | digits[(unsigned char)code]); |
| RyoheiHagimoto | 0:56c5742b9e2b | 357 | pass->raw[(idx >> 2) + 1] = digits[(unsigned char)code]; |
| RyoheiHagimoto | 0:56c5742b9e2b | 358 | dprintf(2, " raw=%d%d%d%d%d%d%d", |
| RyoheiHagimoto | 0:56c5742b9e2b | 359 | pass->raw[0] & 0xf, pass->raw[1] & 0xf, |
| RyoheiHagimoto | 0:56c5742b9e2b | 360 | pass->raw[2] & 0xf, pass->raw[3] & 0xf, |
| RyoheiHagimoto | 0:56c5742b9e2b | 361 | pass->raw[4] & 0xf, pass->raw[5] & 0xf, |
| RyoheiHagimoto | 0:56c5742b9e2b | 362 | pass->raw[6] & 0xf); |
| RyoheiHagimoto | 0:56c5742b9e2b | 363 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 364 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 365 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 366 | if(get_color(dcode) == ZBAR_SPACE && |
| RyoheiHagimoto | 0:56c5742b9e2b | 367 | (idx == 0x18 || idx == 0x19)) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 368 | zbar_symbol_type_t part = ZBAR_NONE; |
| RyoheiHagimoto | 0:56c5742b9e2b | 369 | dprintf(2, " fwd=%x", fwd); |
| RyoheiHagimoto | 0:56c5742b9e2b | 370 | if(!aux_end(dcode, fwd)) |
| RyoheiHagimoto | 0:56c5742b9e2b | 371 | part = ean_part_end7(&dcode->ean, pass, fwd); |
| RyoheiHagimoto | 0:56c5742b9e2b | 372 | pass->state = -1; |
| RyoheiHagimoto | 0:56c5742b9e2b | 373 | return(part); |
| RyoheiHagimoto | 0:56c5742b9e2b | 374 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 375 | return(0); |
| RyoheiHagimoto | 0:56c5742b9e2b | 376 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 377 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 378 | static inline signed char ean_verify_checksum (ean_decoder_t *ean, |
| RyoheiHagimoto | 0:56c5742b9e2b | 379 | int n) |
| RyoheiHagimoto | 0:56c5742b9e2b | 380 | { |
| RyoheiHagimoto | 0:56c5742b9e2b | 381 | unsigned char chk = 0; |
| RyoheiHagimoto | 0:56c5742b9e2b | 382 | unsigned char i; |
| RyoheiHagimoto | 0:56c5742b9e2b | 383 | for(i = 0; i < n; i++) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 384 | unsigned char d = ean->buf[i]; |
| RyoheiHagimoto | 0:56c5742b9e2b | 385 | zassert(d < 10, -1, "i=%x d=%x chk=%x %s\n", i, d, chk, |
| RyoheiHagimoto | 0:56c5742b9e2b | 386 | _zbar_decoder_buf_dump((void*)ean->buf, 18)); |
| RyoheiHagimoto | 0:56c5742b9e2b | 387 | chk += d; |
| RyoheiHagimoto | 0:56c5742b9e2b | 388 | if((i ^ n) & 1) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 389 | chk += d << 1; |
| RyoheiHagimoto | 0:56c5742b9e2b | 390 | if(chk >= 20) |
| RyoheiHagimoto | 0:56c5742b9e2b | 391 | chk -= 20; |
| RyoheiHagimoto | 0:56c5742b9e2b | 392 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 393 | if(chk >= 10) |
| RyoheiHagimoto | 0:56c5742b9e2b | 394 | chk -= 10; |
| RyoheiHagimoto | 0:56c5742b9e2b | 395 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 396 | zassert(chk < 10, -1, "chk=%x n=%x %s", chk, n, |
| RyoheiHagimoto | 0:56c5742b9e2b | 397 | _zbar_decoder_buf_dump((void*)ean->buf, 18)); |
| RyoheiHagimoto | 0:56c5742b9e2b | 398 | if(chk) |
| RyoheiHagimoto | 0:56c5742b9e2b | 399 | chk = 10 - chk; |
| RyoheiHagimoto | 0:56c5742b9e2b | 400 | unsigned char d = ean->buf[n]; |
| RyoheiHagimoto | 0:56c5742b9e2b | 401 | zassert(d < 10, -1, "n=%x d=%x chk=%x %s\n", n, d, chk, |
| RyoheiHagimoto | 0:56c5742b9e2b | 402 | _zbar_decoder_buf_dump((void*)ean->buf, 18)); |
| RyoheiHagimoto | 0:56c5742b9e2b | 403 | if(chk != d) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 404 | dprintf(1, "\nchecksum mismatch %d != %d (%s)\n", |
| RyoheiHagimoto | 0:56c5742b9e2b | 405 | chk, d, dsprintbuf(ean)); |
| RyoheiHagimoto | 0:56c5742b9e2b | 406 | return(-1); |
| RyoheiHagimoto | 0:56c5742b9e2b | 407 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 408 | return(0); |
| RyoheiHagimoto | 0:56c5742b9e2b | 409 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 410 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 411 | static inline unsigned char isbn10_calc_checksum (ean_decoder_t *ean) |
| RyoheiHagimoto | 0:56c5742b9e2b | 412 | { |
| RyoheiHagimoto | 0:56c5742b9e2b | 413 | unsigned int chk = 0; |
| RyoheiHagimoto | 0:56c5742b9e2b | 414 | unsigned char w; |
| RyoheiHagimoto | 0:56c5742b9e2b | 415 | for(w = 10; w > 1; w--) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 416 | unsigned char d = ean->buf[13 - w]; |
| RyoheiHagimoto | 0:56c5742b9e2b | 417 | zassert(d < 10, '?', "w=%x d=%x chk=%x %s\n", w, d, chk, |
| RyoheiHagimoto | 0:56c5742b9e2b | 418 | _zbar_decoder_buf_dump((void*)ean->buf, 18)); |
| RyoheiHagimoto | 0:56c5742b9e2b | 419 | chk += d * w; |
| RyoheiHagimoto | 0:56c5742b9e2b | 420 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 421 | chk = chk % 11; |
| RyoheiHagimoto | 0:56c5742b9e2b | 422 | if(!chk) |
| RyoheiHagimoto | 0:56c5742b9e2b | 423 | return('0'); |
| RyoheiHagimoto | 0:56c5742b9e2b | 424 | chk = 11 - chk; |
| RyoheiHagimoto | 0:56c5742b9e2b | 425 | if(chk < 10) |
| RyoheiHagimoto | 0:56c5742b9e2b | 426 | return(chk + '0'); |
| RyoheiHagimoto | 0:56c5742b9e2b | 427 | return('X'); |
| RyoheiHagimoto | 0:56c5742b9e2b | 428 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 429 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 430 | static inline void ean_expand_upce (ean_decoder_t *ean, |
| RyoheiHagimoto | 0:56c5742b9e2b | 431 | ean_pass_t *pass) |
| RyoheiHagimoto | 0:56c5742b9e2b | 432 | { |
| RyoheiHagimoto | 0:56c5742b9e2b | 433 | int i = 0; |
| RyoheiHagimoto | 0:56c5742b9e2b | 434 | /* parity encoded digit is checksum */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 435 | ean->buf[12] = pass->raw[i++]; |
| RyoheiHagimoto | 0:56c5742b9e2b | 436 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 437 | unsigned char decode = pass->raw[6] & 0xf; |
| RyoheiHagimoto | 0:56c5742b9e2b | 438 | ean->buf[0] = 0; |
| RyoheiHagimoto | 0:56c5742b9e2b | 439 | ean->buf[1] = 0; |
| RyoheiHagimoto | 0:56c5742b9e2b | 440 | ean->buf[2] = pass->raw[i++] & 0xf; |
| RyoheiHagimoto | 0:56c5742b9e2b | 441 | ean->buf[3] = pass->raw[i++] & 0xf; |
| RyoheiHagimoto | 0:56c5742b9e2b | 442 | ean->buf[4] = (decode < 3) ? decode : pass->raw[i++] & 0xf; |
| RyoheiHagimoto | 0:56c5742b9e2b | 443 | ean->buf[5] = (decode < 4) ? 0 : pass->raw[i++] & 0xf; |
| RyoheiHagimoto | 0:56c5742b9e2b | 444 | ean->buf[6] = (decode < 5) ? 0 : pass->raw[i++] & 0xf; |
| RyoheiHagimoto | 0:56c5742b9e2b | 445 | ean->buf[7] = 0; |
| RyoheiHagimoto | 0:56c5742b9e2b | 446 | ean->buf[8] = 0; |
| RyoheiHagimoto | 0:56c5742b9e2b | 447 | ean->buf[9] = (decode < 3) ? pass->raw[i++] & 0xf : 0; |
| RyoheiHagimoto | 0:56c5742b9e2b | 448 | ean->buf[10] = (decode < 4) ? pass->raw[i++] & 0xf : 0; |
| RyoheiHagimoto | 0:56c5742b9e2b | 449 | ean->buf[11] = (decode < 5) ? pass->raw[i++] & 0xf : decode; |
| RyoheiHagimoto | 0:56c5742b9e2b | 450 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 451 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 452 | static inline zbar_symbol_type_t integrate_partial (ean_decoder_t *ean, |
| RyoheiHagimoto | 0:56c5742b9e2b | 453 | ean_pass_t *pass, |
| RyoheiHagimoto | 0:56c5742b9e2b | 454 | zbar_symbol_type_t part) |
| RyoheiHagimoto | 0:56c5742b9e2b | 455 | { |
| RyoheiHagimoto | 0:56c5742b9e2b | 456 | /* copy raw data into holding buffer */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 457 | /* if same partial is not consistent, reset others */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 458 | dprintf(2, " integrate part=%x (%s)", part, dsprintbuf(ean)); |
| RyoheiHagimoto | 0:56c5742b9e2b | 459 | signed char i, j; |
| RyoheiHagimoto | 0:56c5742b9e2b | 460 | if(part & ZBAR_ADDON) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 461 | /* FIXME TBD */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 462 | for(i = (part == ZBAR_ADDON5) ? 4 : 1; i >= 0; i--) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 463 | unsigned char digit = pass->raw[i] & 0xf; |
| RyoheiHagimoto | 0:56c5742b9e2b | 464 | if(ean->addon && ean->buf[i + 13] != digit) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 465 | /* partial mismatch - reset collected parts */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 466 | ean->left = ean->right = ean->addon = ZBAR_NONE; |
| RyoheiHagimoto | 0:56c5742b9e2b | 467 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 468 | ean->buf[i + 13] = digit; |
| RyoheiHagimoto | 0:56c5742b9e2b | 469 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 470 | ean->addon = part; |
| RyoheiHagimoto | 0:56c5742b9e2b | 471 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 472 | else { |
| RyoheiHagimoto | 0:56c5742b9e2b | 473 | if((ean->left && ((part & ZBAR_SYMBOL) != ean->left)) || |
| RyoheiHagimoto | 0:56c5742b9e2b | 474 | (ean->right && ((part & ZBAR_SYMBOL) != ean->right))) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 475 | /* partial mismatch - reset collected parts */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 476 | dprintf(2, " rst(type %x %x)", ean->left, ean->right); |
| RyoheiHagimoto | 0:56c5742b9e2b | 477 | ean->left = ean->right = ean->addon = ZBAR_NONE; |
| RyoheiHagimoto | 0:56c5742b9e2b | 478 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 479 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 480 | if(part & EAN_RIGHT) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 481 | part &= ZBAR_SYMBOL; |
| RyoheiHagimoto | 0:56c5742b9e2b | 482 | j = (part == ZBAR_EAN13) ? 12 : 7; |
| RyoheiHagimoto | 0:56c5742b9e2b | 483 | for(i = (part == ZBAR_EAN13) ? 6 : 4; i; i--, j--) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 484 | unsigned char digit = pass->raw[i] & 0xf; |
| RyoheiHagimoto | 0:56c5742b9e2b | 485 | if(ean->right && ean->buf[j] != digit) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 486 | /* partial mismatch - reset collected parts */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 487 | dprintf(2, " rst(right)"); |
| RyoheiHagimoto | 0:56c5742b9e2b | 488 | ean->left = ean->right = ean->addon = ZBAR_NONE; |
| RyoheiHagimoto | 0:56c5742b9e2b | 489 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 490 | ean->buf[j] = digit; |
| RyoheiHagimoto | 0:56c5742b9e2b | 491 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 492 | ean->right = part; |
| RyoheiHagimoto | 0:56c5742b9e2b | 493 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 494 | else if(part != ZBAR_UPCE) /* EAN_LEFT */ { |
| RyoheiHagimoto | 0:56c5742b9e2b | 495 | j = (part == ZBAR_EAN13) ? 6 : 3; |
| RyoheiHagimoto | 0:56c5742b9e2b | 496 | for(i = (part == ZBAR_EAN13) ? 6 : 4; j >= 0; i--, j--) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 497 | unsigned char digit = pass->raw[i] & 0xf; |
| RyoheiHagimoto | 0:56c5742b9e2b | 498 | if(ean->left && ean->buf[j] != digit) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 499 | /* partial mismatch - reset collected parts */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 500 | dprintf(2, " rst(left)"); |
| RyoheiHagimoto | 0:56c5742b9e2b | 501 | ean->left = ean->right = ean->addon = ZBAR_NONE; |
| RyoheiHagimoto | 0:56c5742b9e2b | 502 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 503 | ean->buf[j] = digit; |
| RyoheiHagimoto | 0:56c5742b9e2b | 504 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 505 | ean->left = part; |
| RyoheiHagimoto | 0:56c5742b9e2b | 506 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 507 | else /* ZBAR_UPCE */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 508 | ean_expand_upce(ean, pass); |
| RyoheiHagimoto | 0:56c5742b9e2b | 509 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 510 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 511 | if((part & ZBAR_SYMBOL) != ZBAR_UPCE) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 512 | part = (ean->left & ean->right); |
| RyoheiHagimoto | 0:56c5742b9e2b | 513 | if(!part) |
| RyoheiHagimoto | 0:56c5742b9e2b | 514 | part = ZBAR_PARTIAL; |
| RyoheiHagimoto | 0:56c5742b9e2b | 515 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 516 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 517 | if(((part == ZBAR_EAN13 || |
| RyoheiHagimoto | 0:56c5742b9e2b | 518 | part == ZBAR_UPCE) && ean_verify_checksum(ean, 12)) || |
| RyoheiHagimoto | 0:56c5742b9e2b | 519 | (part == ZBAR_EAN8 && ean_verify_checksum(ean, 7))) |
| RyoheiHagimoto | 0:56c5742b9e2b | 520 | /* invalid parity */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 521 | part = ZBAR_NONE; |
| RyoheiHagimoto | 0:56c5742b9e2b | 522 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 523 | if(part == ZBAR_EAN13) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 524 | /* special case EAN-13 subsets */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 525 | if(!ean->buf[0] && TEST_CFG(ean->upca_config, ZBAR_CFG_ENABLE)) |
| RyoheiHagimoto | 0:56c5742b9e2b | 526 | part = ZBAR_UPCA; |
| RyoheiHagimoto | 0:56c5742b9e2b | 527 | else if(ean->buf[0] == 9 && ean->buf[1] == 7) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 528 | /* ISBN-10 has priority over ISBN-13(?) */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 529 | if(ean->buf[2] == 8 && |
| RyoheiHagimoto | 0:56c5742b9e2b | 530 | TEST_CFG(ean->isbn10_config, ZBAR_CFG_ENABLE)) |
| RyoheiHagimoto | 0:56c5742b9e2b | 531 | part = ZBAR_ISBN10; |
| RyoheiHagimoto | 0:56c5742b9e2b | 532 | else if((ean->buf[2] == 8 || ean->buf[2] == 9) && |
| RyoheiHagimoto | 0:56c5742b9e2b | 533 | TEST_CFG(ean->isbn13_config, ZBAR_CFG_ENABLE)) |
| RyoheiHagimoto | 0:56c5742b9e2b | 534 | part = ZBAR_ISBN13; |
| RyoheiHagimoto | 0:56c5742b9e2b | 535 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 536 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 537 | else if(part == ZBAR_UPCE) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 538 | if(TEST_CFG(ean->upce_config, ZBAR_CFG_ENABLE)) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 539 | /* UPC-E was decompressed for checksum verification, |
| RyoheiHagimoto | 0:56c5742b9e2b | 540 | * but user requested compressed result |
| RyoheiHagimoto | 0:56c5742b9e2b | 541 | */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 542 | ean->buf[0] = ean->buf[1] = 0; |
| RyoheiHagimoto | 0:56c5742b9e2b | 543 | for(i = 2; i < 8; i++) |
| RyoheiHagimoto | 0:56c5742b9e2b | 544 | ean->buf[i] = pass->raw[i - 1] & 0xf; |
| RyoheiHagimoto | 0:56c5742b9e2b | 545 | ean->buf[i] = pass->raw[0] & 0xf; |
| RyoheiHagimoto | 0:56c5742b9e2b | 546 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 547 | else if(TEST_CFG(ean->upca_config, ZBAR_CFG_ENABLE)) |
| RyoheiHagimoto | 0:56c5742b9e2b | 548 | /* UPC-E reported as UPC-A has priority over EAN-13 */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 549 | part = ZBAR_UPCA; |
| RyoheiHagimoto | 0:56c5742b9e2b | 550 | else if(TEST_CFG(ean->ean13_config, ZBAR_CFG_ENABLE)) |
| RyoheiHagimoto | 0:56c5742b9e2b | 551 | part = ZBAR_EAN13; |
| RyoheiHagimoto | 0:56c5742b9e2b | 552 | else |
| RyoheiHagimoto | 0:56c5742b9e2b | 553 | part = ZBAR_NONE; |
| RyoheiHagimoto | 0:56c5742b9e2b | 554 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 555 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 556 | if(part > ZBAR_PARTIAL) |
| RyoheiHagimoto | 0:56c5742b9e2b | 557 | part |= ean->addon; |
| RyoheiHagimoto | 0:56c5742b9e2b | 558 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 559 | dprintf(2, " %x/%x=%x", ean->left, ean->right, part); |
| RyoheiHagimoto | 0:56c5742b9e2b | 560 | return(part); |
| RyoheiHagimoto | 0:56c5742b9e2b | 561 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 562 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 563 | /* copy result to output buffer */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 564 | static inline void postprocess (zbar_decoder_t *dcode, |
| RyoheiHagimoto | 0:56c5742b9e2b | 565 | zbar_symbol_type_t sym) |
| RyoheiHagimoto | 0:56c5742b9e2b | 566 | { |
| RyoheiHagimoto | 0:56c5742b9e2b | 567 | ean_decoder_t *ean = &dcode->ean; |
| RyoheiHagimoto | 0:56c5742b9e2b | 568 | zbar_symbol_type_t base = sym & ZBAR_SYMBOL; |
| RyoheiHagimoto | 0:56c5742b9e2b | 569 | int i = 0, j = 0; |
| RyoheiHagimoto | 0:56c5742b9e2b | 570 | if(base > ZBAR_PARTIAL) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 571 | if(base == ZBAR_UPCA) |
| RyoheiHagimoto | 0:56c5742b9e2b | 572 | i = 1; |
| RyoheiHagimoto | 0:56c5742b9e2b | 573 | else if(base == ZBAR_UPCE) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 574 | i = 1; |
| RyoheiHagimoto | 0:56c5742b9e2b | 575 | base--; |
| RyoheiHagimoto | 0:56c5742b9e2b | 576 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 577 | else if(base == ZBAR_ISBN13) |
| RyoheiHagimoto | 0:56c5742b9e2b | 578 | base = ZBAR_EAN13; |
| RyoheiHagimoto | 0:56c5742b9e2b | 579 | else if(base == ZBAR_ISBN10) |
| RyoheiHagimoto | 0:56c5742b9e2b | 580 | i = 3; |
| RyoheiHagimoto | 0:56c5742b9e2b | 581 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 582 | if(base == ZBAR_ISBN10 || |
| RyoheiHagimoto | 0:56c5742b9e2b | 583 | !TEST_CFG(ean_get_config(ean, sym), ZBAR_CFG_EMIT_CHECK)) |
| RyoheiHagimoto | 0:56c5742b9e2b | 584 | base--; |
| RyoheiHagimoto | 0:56c5742b9e2b | 585 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 586 | for(; j < base && ean->buf[i] >= 0; i++, j++) |
| RyoheiHagimoto | 0:56c5742b9e2b | 587 | dcode->buf[j] = ean->buf[i] + '0'; |
| RyoheiHagimoto | 0:56c5742b9e2b | 588 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 589 | if((sym & ZBAR_SYMBOL) == ZBAR_ISBN10 && j == 9 && |
| RyoheiHagimoto | 0:56c5742b9e2b | 590 | TEST_CFG(ean->isbn10_config, ZBAR_CFG_EMIT_CHECK)) |
| RyoheiHagimoto | 0:56c5742b9e2b | 591 | /* recalculate ISBN-10 check digit */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 592 | dcode->buf[j++] = isbn10_calc_checksum(ean); |
| RyoheiHagimoto | 0:56c5742b9e2b | 593 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 594 | if(sym & ZBAR_ADDON) |
| RyoheiHagimoto | 0:56c5742b9e2b | 595 | for(i = 13; ean->buf[i] >= 0; i++, j++) |
| RyoheiHagimoto | 0:56c5742b9e2b | 596 | dcode->buf[j] = ean->buf[i] + '0'; |
| RyoheiHagimoto | 0:56c5742b9e2b | 597 | dcode->buflen = j; |
| RyoheiHagimoto | 0:56c5742b9e2b | 598 | dcode->buf[j] = '\0'; |
| RyoheiHagimoto | 0:56c5742b9e2b | 599 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 600 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 601 | zbar_symbol_type_t _zbar_decode_ean (zbar_decoder_t *dcode) |
| RyoheiHagimoto | 0:56c5742b9e2b | 602 | { |
| RyoheiHagimoto | 0:56c5742b9e2b | 603 | /* process upto 4 separate passes */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 604 | zbar_symbol_type_t sym = ZBAR_NONE; |
| RyoheiHagimoto | 0:56c5742b9e2b | 605 | unsigned char pass_idx = dcode->idx & 3; |
| RyoheiHagimoto | 0:56c5742b9e2b | 606 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 607 | /* update latest character width */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 608 | dcode->ean.s4 -= get_width(dcode, 4); |
| RyoheiHagimoto | 0:56c5742b9e2b | 609 | dcode->ean.s4 += get_width(dcode, 0); |
| RyoheiHagimoto | 0:56c5742b9e2b | 610 | |
| RyoheiHagimoto | 0:56c5742b9e2b | 611 | unsigned char i; |
| RyoheiHagimoto | 0:56c5742b9e2b | 612 | for(i = 0; i < 4; i++) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 613 | ean_pass_t *pass = &dcode->ean.pass[i]; |
| RyoheiHagimoto | 0:56c5742b9e2b | 614 | if(pass->state >= 0 || |
| RyoheiHagimoto | 0:56c5742b9e2b | 615 | i == pass_idx) |
| RyoheiHagimoto | 0:56c5742b9e2b | 616 | { |
| RyoheiHagimoto | 0:56c5742b9e2b | 617 | dprintf(2, " ean[%x/%x]: idx=%x st=%d s=%d", |
| RyoheiHagimoto | 0:56c5742b9e2b | 618 | pass_idx, i, dcode->idx, pass->state, dcode->ean.s4); |
| RyoheiHagimoto | 0:56c5742b9e2b | 619 | zbar_symbol_type_t part = decode_pass(dcode, pass); |
| RyoheiHagimoto | 0:56c5742b9e2b | 620 | if(part) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 621 | /* update accumulated data from new partial decode */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 622 | sym = integrate_partial(&dcode->ean, pass, part); |
| RyoheiHagimoto | 0:56c5742b9e2b | 623 | if(sym) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 624 | /* this pass valid => _reset_ all passes */ |
| RyoheiHagimoto | 0:56c5742b9e2b | 625 | dprintf(2, " sym=%x", sym); |
| RyoheiHagimoto | 0:56c5742b9e2b | 626 | dcode->ean.pass[0].state = dcode->ean.pass[1].state = -1; |
| RyoheiHagimoto | 0:56c5742b9e2b | 627 | dcode->ean.pass[2].state = dcode->ean.pass[3].state = -1; |
| RyoheiHagimoto | 0:56c5742b9e2b | 628 | if(sym > ZBAR_PARTIAL) { |
| RyoheiHagimoto | 0:56c5742b9e2b | 629 | if(!get_lock(dcode, ZBAR_EAN13)) |
| RyoheiHagimoto | 0:56c5742b9e2b | 630 | postprocess(dcode, sym); |
| RyoheiHagimoto | 0:56c5742b9e2b | 631 | else { |
| RyoheiHagimoto | 0:56c5742b9e2b | 632 | dprintf(1, " [locked %d]", dcode->lock); |
| RyoheiHagimoto | 0:56c5742b9e2b | 633 | sym = ZBAR_PARTIAL; |
| RyoheiHagimoto | 0:56c5742b9e2b | 634 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 635 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 636 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 637 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 638 | dprintf(2, "\n"); |
| RyoheiHagimoto | 0:56c5742b9e2b | 639 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 640 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 641 | return(sym); |
| RyoheiHagimoto | 0:56c5742b9e2b | 642 | } |
| RyoheiHagimoto | 0:56c5742b9e2b | 643 |