1 // Copyright 2014 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6 // Original code is licensed as follows:
7 /*
8 * Copyright 2008 ZXing authors
9 *
10 * Licensed under the Apache License, Version 2.0 (the "License");
11 * you may not use this file except in compliance with the License.
12 * You may obtain a copy of the License at
13 *
14 * http://www.apache.org/licenses/LICENSE-2.0
15 *
16 * Unless required by applicable law or agreed to in writing, software
17 * distributed under the License is distributed on an "AS IS" BASIS,
18 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
19 * See the License for the specific language governing permissions and
20 * limitations under the License.
21 */
22
23 #include "xfa/src/fxbarcode/barcode.h"
24 #include "xfa/src/fxbarcode/common/BC_CommonBitMatrix.h"
25 #include "xfa/src/fxbarcode/common/BC_CommonDecoderResult.h"
26 #include "xfa/src/fxbarcode/common/reedsolomon/BC_ReedSolomonDecoder.h"
27 #include "xfa/src/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256.h"
28 #include "BC_QRBitMatrixParser.h"
29 #include "BC_QRDataBlock.h"
30 #include "BC_QRDecodedBitStreamParser.h"
31 #include "BC_QRCoderVersion.h"
32 #include "BC_QRCoderFormatInformation.h"
33 #include "BC_QRCoderDecoder.h"
CBC_QRCoderDecoder()34 CBC_QRCoderDecoder::CBC_QRCoderDecoder() {
35 m_rsDecoder = NULL;
36 }
37
Init()38 void CBC_QRCoderDecoder::Init() {
39 m_rsDecoder = new CBC_ReedSolomonDecoder(CBC_ReedSolomonGF256::QRCodeFild);
40 }
~CBC_QRCoderDecoder()41 CBC_QRCoderDecoder::~CBC_QRCoderDecoder() {
42 if (m_rsDecoder != NULL) {
43 delete m_rsDecoder;
44 }
45 m_rsDecoder = NULL;
46 }
Decode(FX_BOOL * image,int32_t width,int32_t height,int32_t & e)47 CBC_CommonDecoderResult* CBC_QRCoderDecoder::Decode(FX_BOOL* image,
48 int32_t width,
49 int32_t height,
50 int32_t& e) {
51 CBC_CommonBitMatrix bits;
52 bits.Init(width);
53 for (int32_t i = 0; i < width; i++) {
54 for (int32_t j = 0; j < height; j++) {
55 if (image[i * width + j]) {
56 bits.Set(j, i);
57 }
58 }
59 }
60 CBC_CommonDecoderResult* cdr = Decode(&bits, height, e);
61 BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
62 return cdr;
63 }
Decode(CBC_CommonBitMatrix * bits,int32_t byteModeDecode,int32_t & e)64 CBC_CommonDecoderResult* CBC_QRCoderDecoder::Decode(CBC_CommonBitMatrix* bits,
65 int32_t byteModeDecode,
66 int32_t& e) {
67 CBC_QRBitMatrixParser parser;
68 parser.Init(bits, e);
69 BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
70 CBC_QRCoderVersion* version = parser.ReadVersion(e);
71 BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
72 CBC_QRCoderFormatInformation* temp = parser.ReadFormatInformation(e);
73 BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
74 CBC_QRCoderErrorCorrectionLevel* ecLevel = temp->GetErrorCorrectionLevel();
75 CFX_ByteArray* ba = parser.ReadCodewords(e);
76 BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
77 CBC_AutoPtr<CFX_ByteArray> codewords(ba);
78 CFX_PtrArray* dataBlocks =
79 CBC_QRDataBlock::GetDataBlocks(codewords.get(), version, ecLevel, e);
80 BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
81 int32_t totalBytes = 0;
82 for (int32_t i = 0; i < dataBlocks->GetSize(); i++) {
83 totalBytes += ((CBC_QRDataBlock*)((*dataBlocks)[i]))->GetNumDataCodewords();
84 }
85 CFX_ByteArray resultBytes;
86 for (int32_t j = 0; j < dataBlocks->GetSize(); j++) {
87 CBC_QRDataBlock* dataBlock = (CBC_QRDataBlock*)((*dataBlocks)[j]);
88 CFX_ByteArray* codewordBytes = dataBlock->GetCodewords();
89 int32_t numDataCodewords = dataBlock->GetNumDataCodewords();
90 CorrectErrors(codewordBytes, numDataCodewords, e);
91 if (e != BCExceptionNO) {
92 for (int32_t k = 0; k < dataBlocks->GetSize(); k++) {
93 delete (CBC_QRDataBlock*)(*dataBlocks)[k];
94 }
95 dataBlocks->RemoveAll();
96 delete dataBlocks;
97 dataBlocks = NULL;
98 return NULL;
99 }
100 for (int32_t i = 0; i < numDataCodewords; i++) {
101 resultBytes.Add((*codewordBytes)[i]);
102 }
103 }
104 for (int32_t k = 0; k < dataBlocks->GetSize(); k++) {
105 delete (CBC_QRDataBlock*)(*dataBlocks)[k];
106 }
107 dataBlocks->RemoveAll();
108 delete dataBlocks;
109 dataBlocks = NULL;
110 CBC_CommonDecoderResult* cdr = CBC_QRDecodedBitStreamParser::Decode(
111 &resultBytes, version, ecLevel, byteModeDecode, e);
112 BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
113 return cdr;
114 }
CorrectErrors(CFX_ByteArray * codewordBytes,int32_t numDataCodewords,int32_t & e)115 void CBC_QRCoderDecoder::CorrectErrors(CFX_ByteArray* codewordBytes,
116 int32_t numDataCodewords,
117 int32_t& e) {
118 int32_t numCodewords = codewordBytes->GetSize();
119 CFX_Int32Array codewordsInts;
120 codewordsInts.SetSize(numCodewords);
121 for (int32_t i = 0; i < numCodewords; i++) {
122 codewordsInts[i] = (int32_t)((*codewordBytes)[i] & 0xff);
123 }
124 int32_t numECCodewords = codewordBytes->GetSize() - numDataCodewords;
125 m_rsDecoder->Decode(&codewordsInts, numECCodewords, e);
126 BC_EXCEPTION_CHECK_ReturnVoid(e);
127 for (int32_t k = 0; k < numDataCodewords; k++) {
128 (*codewordBytes)[k] = (uint8_t)codewordsInts[k];
129 }
130 }
131