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authorDan Sinclair <dsinclair@chromium.org>2016-03-14 14:14:16 -0400
committerDan Sinclair <dsinclair@chromium.org>2016-03-14 14:14:16 -0400
commit1770c021cf998ff1b33855b1397f6ea8ff9f7cd7 (patch)
tree285e39abd4b5872d8cd632b9e331b0667fdc3eae /xfa/fxbarcode/pdf417/BC_PDF417CodewordDecoder.cpp
parentf766ad219f66543654520f6a1955836f519e26d1 (diff)
downloadpdfium-1770c021cf998ff1b33855b1397f6ea8ff9f7cd7.tar.xz
Move xfa/src up to xfa/.
This CL moves the xfa/src files up to the xfa/ directory and fixes the includes, include guards, and build files. R=tsepez@chromium.org Review URL: https://codereview.chromium.org/1803723002 .
Diffstat (limited to 'xfa/fxbarcode/pdf417/BC_PDF417CodewordDecoder.cpp')
-rw-r--r--xfa/fxbarcode/pdf417/BC_PDF417CodewordDecoder.cpp117
1 files changed, 117 insertions, 0 deletions
diff --git a/xfa/fxbarcode/pdf417/BC_PDF417CodewordDecoder.cpp b/xfa/fxbarcode/pdf417/BC_PDF417CodewordDecoder.cpp
new file mode 100644
index 0000000000..dfbbc70264
--- /dev/null
+++ b/xfa/fxbarcode/pdf417/BC_PDF417CodewordDecoder.cpp
@@ -0,0 +1,117 @@
+// 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 2013 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 <limits>
+
+#include "xfa/fxbarcode/pdf417/BC_PDF417CodewordDecoder.h"
+#include "xfa/fxbarcode/pdf417/BC_PDF417Common.h"
+
+#define SYMBOL_TABLE_Length 2787
+
+FX_FLOAT CBC_PDF417CodewordDecoder::RATIOS_TABLE[2787][8] = {{0}};
+
+CBC_PDF417CodewordDecoder::CBC_PDF417CodewordDecoder() {}
+CBC_PDF417CodewordDecoder::~CBC_PDF417CodewordDecoder() {}
+void CBC_PDF417CodewordDecoder::Initialize() {
+ for (int32_t i = 0; i < SYMBOL_TABLE_Length; i++) {
+ int32_t currentSymbol = CBC_PDF417Common::SYMBOL_TABLE[i];
+ int32_t currentBit = currentSymbol & 0x1;
+ for (int32_t j = 0; j < CBC_PDF417Common::BARS_IN_MODULE; j++) {
+ FX_FLOAT size = 0.0f;
+ while ((currentSymbol & 0x1) == currentBit) {
+ size += 1.0f;
+ currentSymbol >>= 1;
+ }
+ currentBit = currentSymbol & 0x1;
+ RATIOS_TABLE[i][CBC_PDF417Common::BARS_IN_MODULE - j - 1] =
+ size / CBC_PDF417Common::MODULES_IN_CODEWORD;
+ }
+ }
+}
+void CBC_PDF417CodewordDecoder::Finalize() {}
+int32_t CBC_PDF417CodewordDecoder::getDecodedValue(
+ CFX_Int32Array& moduleBitCount) {
+ CFX_Int32Array* array = sampleBitCounts(moduleBitCount);
+ int32_t decodedValue = getDecodedCodewordValue(*array);
+ delete array;
+ if (decodedValue != -1) {
+ return decodedValue;
+ }
+ return getClosestDecodedValue(moduleBitCount);
+}
+CFX_Int32Array* CBC_PDF417CodewordDecoder::sampleBitCounts(
+ CFX_Int32Array& moduleBitCount) {
+ FX_FLOAT bitCountSum =
+ (FX_FLOAT)CBC_PDF417Common::getBitCountSum(moduleBitCount);
+ CFX_Int32Array* bitCount = new CFX_Int32Array();
+ bitCount->SetSize(CBC_PDF417Common::BARS_IN_MODULE);
+ int32_t bitCountIndex = 0;
+ int32_t sumPreviousBits = 0;
+ for (int32_t i = 0; i < CBC_PDF417Common::MODULES_IN_CODEWORD; i++) {
+ FX_FLOAT sampleIndex =
+ bitCountSum / (2 * CBC_PDF417Common::MODULES_IN_CODEWORD) +
+ (i * bitCountSum) / CBC_PDF417Common::MODULES_IN_CODEWORD;
+ if (sumPreviousBits + moduleBitCount.GetAt(bitCountIndex) <= sampleIndex) {
+ sumPreviousBits += moduleBitCount.GetAt(bitCountIndex);
+ bitCountIndex++;
+ }
+ bitCount->SetAt(bitCountIndex, bitCount->GetAt(bitCountIndex) + 1);
+ }
+ return bitCount;
+}
+int32_t CBC_PDF417CodewordDecoder::getDecodedCodewordValue(
+ CFX_Int32Array& moduleBitCount) {
+ int32_t decodedValue = getBitValue(moduleBitCount);
+ return CBC_PDF417Common::getCodeword(decodedValue) == -1 ? -1 : decodedValue;
+}
+int32_t CBC_PDF417CodewordDecoder::getBitValue(CFX_Int32Array& moduleBitCount) {
+ int64_t result = 0;
+ for (int32_t i = 0; i < moduleBitCount.GetSize(); i++) {
+ for (int32_t bit = 0; bit < moduleBitCount.GetAt(i); bit++) {
+ result = (result << 1) | (i % 2 == 0 ? 1 : 0);
+ }
+ }
+ return (int32_t)result;
+}
+int32_t CBC_PDF417CodewordDecoder::getClosestDecodedValue(
+ CFX_Int32Array& moduleBitCount) {
+ int32_t bitCountSum = CBC_PDF417Common::getBitCountSum(moduleBitCount);
+ CFX_FloatArray bitCountRatios;
+ bitCountRatios.SetSize(CBC_PDF417Common::BARS_IN_MODULE);
+ for (int32_t i = 0; i < bitCountRatios.GetSize(); i++) {
+ bitCountRatios[i] = moduleBitCount.GetAt(i) / (FX_FLOAT)bitCountSum;
+ }
+ FX_FLOAT bestMatchError = std::numeric_limits<int32_t>::max();
+ int32_t bestMatch = -1;
+ for (int32_t j = 0; j < SYMBOL_TABLE_Length; j++) {
+ FX_FLOAT error = 0.0f;
+ for (int32_t k = 0; k < CBC_PDF417Common::BARS_IN_MODULE; k++) {
+ FX_FLOAT diff = RATIOS_TABLE[j][k] - bitCountRatios[k];
+ error += diff * diff;
+ }
+ if (error < bestMatchError) {
+ bestMatchError = error;
+ bestMatch = CBC_PDF417Common::SYMBOL_TABLE[j];
+ }
+ }
+ return bestMatch;
+}