// 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 2007 ZXing authors | |
* | |
* 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 "xfa/src/fxbarcode/barcode.h" | |
#include "xfa/src/fxbarcode/common/BC_CommonBitMatrix.h" | |
#include "xfa/src/fxbarcode/common/reedsolomon/BC_ReedSolomonDecoder.h" | |
#include "xfa/src/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256.h" | |
#include "BC_DataMatrixDecoder.h" | |
#include "BC_DataMatrixBitMatrixParser.h" | |
#include "BC_DataMatrixVersion.h" | |
#include "BC_DataMatrixDataBlock.h" | |
#include "BC_DataMatrixDecodedBitStreamParser.h" | |
CBC_DataMatrixDecoder::CBC_DataMatrixDecoder() { | |
m_rsDecoder = NULL; | |
} | |
void CBC_DataMatrixDecoder::Init() { | |
m_rsDecoder = | |
new CBC_ReedSolomonDecoder(CBC_ReedSolomonGF256::DataMatrixField); | |
} | |
CBC_DataMatrixDecoder::~CBC_DataMatrixDecoder() { | |
if (m_rsDecoder != NULL) { | |
delete m_rsDecoder; | |
} | |
m_rsDecoder = NULL; | |
} | |
CBC_CommonDecoderResult* CBC_DataMatrixDecoder::Decode( | |
CBC_CommonBitMatrix* bits, | |
int32_t& e) { | |
CBC_DataMatrixBitMatrixParser parser; | |
parser.Init(bits, e); | |
BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
CBC_DataMatrixVersion* version = parser.GetVersion(); | |
CFX_ByteArray* byteTemp = parser.ReadCodewords(e); | |
BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
CBC_AutoPtr<CFX_ByteArray> codewords(byteTemp); | |
CFX_PtrArray* dataBlocks = | |
CBC_DataMatrixDataBlock::GetDataBlocks(codewords.get(), version, e); | |
BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
int32_t dataBlocksCount = dataBlocks->GetSize(); | |
int32_t totalBytes = 0; | |
int32_t i, j; | |
for (i = 0; i < dataBlocksCount; i++) { | |
totalBytes += | |
((CBC_DataMatrixDataBlock*)(*dataBlocks)[i])->GetNumDataCodewords(); | |
} | |
CFX_ByteArray resultBytes; | |
resultBytes.SetSize(totalBytes); | |
for (j = 0; j < dataBlocksCount; j++) { | |
CFX_ByteArray* codewordBytes = | |
((CBC_DataMatrixDataBlock*)(*dataBlocks)[j])->GetCodewords(); | |
int32_t numDataCodewords = | |
((CBC_DataMatrixDataBlock*)(*dataBlocks)[j])->GetNumDataCodewords(); | |
CorrectErrors(*codewordBytes, numDataCodewords, e); | |
if (e != BCExceptionNO) { | |
for (int32_t i = 0; i < dataBlocks->GetSize(); i++) { | |
delete (CBC_DataMatrixDataBlock*)(*dataBlocks)[i]; | |
} | |
delete dataBlocks; | |
dataBlocks = NULL; | |
return NULL; | |
} | |
int32_t i; | |
for (i = 0; i < numDataCodewords; i++) { | |
resultBytes[i * dataBlocksCount + j] = (*codewordBytes)[i]; | |
} | |
} | |
for (i = 0; i < (dataBlocks->GetSize()); i++) { | |
delete (CBC_DataMatrixDataBlock*)(*dataBlocks)[i]; | |
} | |
delete dataBlocks; | |
dataBlocks = NULL; | |
CBC_CommonDecoderResult* resultR = | |
CBC_DataMatrixDecodedBitStreamParser::Decode(resultBytes, e); | |
BC_EXCEPTION_CHECK_ReturnValue(e, NULL); | |
return resultR; | |
} | |
void CBC_DataMatrixDecoder::CorrectErrors(CFX_ByteArray& codewordBytes, | |
int32_t numDataCodewords, | |
int32_t& e) { | |
int32_t numCodewords = codewordBytes.GetSize(); | |
CFX_Int32Array codewordsInts; | |
codewordsInts.SetSize(numCodewords); | |
int32_t i; | |
for (i = 0; i < numCodewords; i++) { | |
codewordsInts[i] = codewordBytes[i] & 0xFF; | |
} | |
int32_t numECCodewords = codewordBytes.GetSize() - numDataCodewords; | |
m_rsDecoder->Decode(&codewordsInts, numECCodewords, e); | |
if (e != BCExceptionNO) { | |
e = BCExceptionChecksumException; | |
return; | |
} | |
for (i = 0; i < numDataCodewords; i++) { | |
codewordBytes[i] = (uint8_t)codewordsInts[i]; | |
} | |
} |