blob: 9c6ff7dec57987123a64e3b1e729aeec19363a68 [file] [log] [blame]
// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
// Original code is licensed as follows:
/*
* Copyright 2006 Jeremias Maerki.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "fxbarcode/datamatrix/BC_ErrorCorrection.h"
#include <algorithm>
#include <vector>
#include "fxbarcode/datamatrix/BC_Encoder.h"
#include "fxbarcode/datamatrix/BC_SymbolInfo.h"
namespace {
const uint8_t FACTOR_SETS[] = {5, 7, 10, 11, 12, 14, 18, 20,
24, 28, 36, 42, 48, 56, 62, 68};
const uint8_t FACTORS_0[5] = {228, 48, 15, 111, 62};
const uint8_t FACTORS_1[7] = {23, 68, 144, 134, 240, 92, 254};
const uint8_t FACTORS_2[10] = {28, 24, 185, 166, 223, 248, 116, 255, 110, 61};
const uint8_t FACTORS_3[11] = {175, 138, 205, 12, 194, 168,
39, 245, 60, 97, 120};
const uint8_t FACTORS_4[12] = {41, 153, 158, 91, 61, 42,
142, 213, 97, 178, 100, 242};
const uint8_t FACTORS_5[14] = {156, 97, 192, 252, 95, 9, 157,
119, 138, 45, 18, 186, 83, 185};
const uint8_t FACTORS_6[18] = {83, 195, 100, 39, 188, 75, 66, 61, 241,
213, 109, 129, 94, 254, 225, 48, 90, 188};
const uint8_t FACTORS_7[20] = {15, 195, 244, 9, 233, 71, 168, 2, 188, 160,
153, 145, 253, 79, 108, 82, 27, 174, 186, 172};
const uint8_t FACTORS_8[24] = {52, 190, 88, 205, 109, 39, 176, 21,
155, 197, 251, 223, 155, 21, 5, 172,
254, 124, 12, 181, 184, 96, 50, 193};
const uint8_t FACTORS_9[28] = {211, 231, 43, 97, 71, 96, 103, 174, 37, 151,
170, 53, 75, 34, 249, 121, 17, 138, 110, 213,
141, 136, 120, 151, 233, 168, 93, 255};
const uint8_t FACTORS_10[36] = {245, 127, 242, 218, 130, 250, 162, 181, 102,
120, 84, 179, 220, 251, 80, 182, 229, 18,
2, 4, 68, 33, 101, 137, 95, 119, 115,
44, 175, 184, 59, 25, 225, 98, 81, 112};
const uint8_t FACTORS_11[42] = {
77, 193, 137, 31, 19, 38, 22, 153, 247, 105, 122, 2, 245, 133,
242, 8, 175, 95, 100, 9, 167, 105, 214, 111, 57, 121, 21, 1,
253, 57, 54, 101, 248, 202, 69, 50, 150, 177, 226, 5, 9, 5};
const uint8_t FACTORS_12[48] = {
245, 132, 172, 223, 96, 32, 117, 22, 238, 133, 238, 231,
205, 188, 237, 87, 191, 106, 16, 147, 118, 23, 37, 90,
170, 205, 131, 88, 120, 100, 66, 138, 186, 240, 82, 44,
176, 87, 187, 147, 160, 175, 69, 213, 92, 253, 225, 19};
const uint8_t FACTORS_13[56] = {
175, 9, 223, 238, 12, 17, 220, 208, 100, 29, 175, 170, 230, 192,
215, 235, 150, 159, 36, 223, 38, 200, 132, 54, 228, 146, 218, 234,
117, 203, 29, 232, 144, 238, 22, 150, 201, 117, 62, 207, 164, 13,
137, 245, 127, 67, 247, 28, 155, 43, 203, 107, 233, 53, 143, 46};
const uint8_t FACTORS_14[62] = {
242, 93, 169, 50, 144, 210, 39, 118, 202, 188, 201, 189, 143,
108, 196, 37, 185, 112, 134, 230, 245, 63, 197, 190, 250, 106,
185, 221, 175, 64, 114, 71, 161, 44, 147, 6, 27, 218, 51,
63, 87, 10, 40, 130, 188, 17, 163, 31, 176, 170, 4, 107,
232, 7, 94, 166, 224, 124, 86, 47, 11, 204};
const uint8_t FACTORS_15[68] = {
220, 228, 173, 89, 251, 149, 159, 56, 89, 33, 147, 244, 154, 36,
73, 127, 213, 136, 248, 180, 234, 197, 158, 177, 68, 122, 93, 213,
15, 160, 227, 236, 66, 139, 153, 185, 202, 167, 179, 25, 220, 232,
96, 210, 231, 136, 223, 239, 181, 241, 59, 52, 172, 25, 49, 232,
211, 189, 64, 54, 108, 153, 132, 63, 96, 103, 82, 186};
const uint8_t* const FACTORS[16] = {
FACTORS_0, FACTORS_1, FACTORS_2, FACTORS_3, FACTORS_4, FACTORS_5,
FACTORS_6, FACTORS_7, FACTORS_8, FACTORS_9, FACTORS_10, FACTORS_11,
FACTORS_12, FACTORS_13, FACTORS_14, FACTORS_15};
constexpr uint8_t LOG[256] = {
0, 0, 1, 240, 2, 225, 241, 53, 3, 38, 226, 133, 242, 43, 54,
210, 4, 195, 39, 114, 227, 106, 134, 28, 243, 140, 44, 23, 55, 118,
211, 234, 5, 219, 196, 96, 40, 222, 115, 103, 228, 78, 107, 125, 135,
8, 29, 162, 244, 186, 141, 180, 45, 99, 24, 49, 56, 13, 119, 153,
212, 199, 235, 91, 6, 76, 220, 217, 197, 11, 97, 184, 41, 36, 223,
253, 116, 138, 104, 193, 229, 86, 79, 171, 108, 165, 126, 145, 136, 34,
9, 74, 30, 32, 163, 84, 245, 173, 187, 204, 142, 81, 181, 190, 46,
88, 100, 159, 25, 231, 50, 207, 57, 147, 14, 67, 120, 128, 154, 248,
213, 167, 200, 63, 236, 110, 92, 176, 7, 161, 77, 124, 221, 102, 218,
95, 198, 90, 12, 152, 98, 48, 185, 179, 42, 209, 37, 132, 224, 52,
254, 239, 117, 233, 139, 22, 105, 27, 194, 113, 230, 206, 87, 158, 80,
189, 172, 203, 109, 175, 166, 62, 127, 247, 146, 66, 137, 192, 35, 252,
10, 183, 75, 216, 31, 83, 33, 73, 164, 144, 85, 170, 246, 65, 174,
61, 188, 202, 205, 157, 143, 169, 82, 72, 182, 215, 191, 251, 47, 178,
89, 151, 101, 94, 160, 123, 26, 112, 232, 21, 51, 238, 208, 131, 58,
69, 148, 18, 15, 16, 68, 17, 121, 149, 129, 19, 155, 59, 249, 70,
214, 250, 168, 71, 201, 156, 64, 60, 237, 130, 111, 20, 93, 122, 177,
150};
constexpr uint8_t ALOG[256] = {
1, 2, 4, 8, 16, 32, 64, 128, 45, 90, 180, 69, 138, 57, 114,
228, 229, 231, 227, 235, 251, 219, 155, 27, 54, 108, 216, 157, 23, 46,
92, 184, 93, 186, 89, 178, 73, 146, 9, 18, 36, 72, 144, 13, 26,
52, 104, 208, 141, 55, 110, 220, 149, 7, 14, 28, 56, 112, 224, 237,
247, 195, 171, 123, 246, 193, 175, 115, 230, 225, 239, 243, 203, 187, 91,
182, 65, 130, 41, 82, 164, 101, 202, 185, 95, 190, 81, 162, 105, 210,
137, 63, 126, 252, 213, 135, 35, 70, 140, 53, 106, 212, 133, 39, 78,
156, 21, 42, 84, 168, 125, 250, 217, 159, 19, 38, 76, 152, 29, 58,
116, 232, 253, 215, 131, 43, 86, 172, 117, 234, 249, 223, 147, 11, 22,
44, 88, 176, 77, 154, 25, 50, 100, 200, 189, 87, 174, 113, 226, 233,
255, 211, 139, 59, 118, 236, 245, 199, 163, 107, 214, 129, 47, 94, 188,
85, 170, 121, 242, 201, 191, 83, 166, 97, 194, 169, 127, 254, 209, 143,
51, 102, 204, 181, 71, 142, 49, 98, 196, 165, 103, 206, 177, 79, 158,
17, 34, 68, 136, 61, 122, 244, 197, 167, 99, 198, 161, 111, 222, 145,
15, 30, 60, 120, 240, 205, 183, 67, 134, 33, 66, 132, 37, 74, 148,
5, 10, 20, 40, 80, 160, 109, 218, 153, 31, 62, 124, 248, 221, 151,
3, 6, 12, 24, 48, 96, 192, 173, 119, 238, 241, 207, 179, 75, 150,
0};
WideString CreateECCBlock(const WideString& codewords, size_t numECWords) {
ASSERT(numECWords > 0);
const size_t len = codewords.GetLength();
static constexpr size_t kFactorTableNum = FX_ArraySize(FACTOR_SETS);
size_t table = 0;
while (table < kFactorTableNum && FACTOR_SETS[table] != numECWords)
++table;
if (table >= kFactorTableNum)
return WideString();
std::vector<uint16_t> ecc(numECWords);
for (size_t i = 0; i < len; ++i) {
uint16_t m = ecc[numECWords - 1] ^ codewords[i];
for (int32_t j = numECWords - 1; j > 0; --j) {
if (m != 0 && FACTORS[table][j] != 0) {
ecc[j] = static_cast<uint16_t>(
ecc[j - 1] ^ ALOG[(LOG[m] + LOG[FACTORS[table][j]]) % 255]);
} else {
ecc[j] = ecc[j - 1];
}
}
if (m != 0 && FACTORS[table][0] != 0) {
ecc[0] =
static_cast<uint16_t>(ALOG[(LOG[m] + LOG[FACTORS[table][0]]) % 255]);
} else {
ecc[0] = 0;
}
}
WideString strecc;
strecc.Reserve(numECWords);
for (size_t i = 0; i < numECWords; ++i)
strecc.InsertAtBack(static_cast<wchar_t>(ecc[numECWords - i - 1]));
ASSERT(!strecc.IsEmpty());
return strecc;
}
} // namespace
WideString CBC_ErrorCorrection::EncodeECC200(const WideString& codewords,
const CBC_SymbolInfo* symbolInfo) {
if (codewords.GetLength() != symbolInfo->dataCapacity())
return WideString();
WideString sb = codewords;
size_t blockCount = symbolInfo->getInterleavedBlockCount();
if (blockCount == 1) {
WideString ecc = CreateECCBlock(codewords, symbolInfo->errorCodewords());
if (ecc.IsEmpty())
return WideString();
sb += ecc;
} else {
std::vector<size_t> dataSizes(blockCount);
std::vector<size_t> errorSizes(blockCount);
std::vector<size_t> startPos(blockCount);
for (size_t i = 0; i < blockCount; ++i) {
dataSizes[i] = symbolInfo->getDataLengthForInterleavedBlock();
errorSizes[i] = symbolInfo->getErrorLengthForInterleavedBlock();
startPos[i] = i > 0 ? startPos[i - 1] + dataSizes[i] : 0;
}
size_t max_error_sizes =
*std::max_element(errorSizes.begin(), errorSizes.end()) * blockCount;
sb.Reserve(sb.GetLength() + max_error_sizes);
for (size_t i = 0; i < max_error_sizes; ++i)
sb.InsertAtBack(0);
for (size_t block = 0; block < blockCount; ++block) {
WideString temp;
if (symbolInfo->dataCapacity() > block)
temp.Reserve((symbolInfo->dataCapacity() - block / blockCount) + 1);
for (size_t d = block; d < symbolInfo->dataCapacity(); d += blockCount)
temp.InsertAtBack(static_cast<wchar_t>(codewords[d]));
WideString ecc = CreateECCBlock(temp, errorSizes[block]);
if (ecc.IsEmpty())
return WideString();
for (size_t pos = 0, i = block; i < errorSizes[block] * blockCount;
++pos, i += blockCount) {
sb.SetAt(symbolInfo->dataCapacity() + i, ecc[pos]);
}
}
}
ASSERT(!sb.IsEmpty());
return sb;
}