Organize barcode codes into modules.

Previously all the files in barcode are lumped together.
The naming of some files are inconsistent,
leading to difficult understanding of the structure.
Now files are grouped based on different barcode type like in zxing.
This also matches what it looks like in other xfa folders.
The file names in each folder could be further modified to be consistent.

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/842043002

1 files changed, 118 insertions, 0 deletions

diff --git a/xfa/src/fxbarcode/pdf417/BC_PDF417CodewordDecoder.cpp b/xfa/src/fxbarcode/pdf417/BC_PDF417CodewordDecoder.cpp
new file mode 100644
index 0000000000..bf16bc25e0
--- /dev/null
+++ b/xfa/src/fxbarcode/pdf417/BC_PDF417CodewordDecoder.cpp
@@ -0,0 +1,118 @@
+// 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 "../barcode.h"

+#include "BC_PDF417Common.h"

+#include "BC_PDF417CodewordDecoder.h"

+#define     SYMBOL_TABLE_Length       2787

+#define     Float_MAX_VALUE           2147483647

+FX_FLOAT CBC_PDF417CodewordDecoder::RATIOS_TABLE[2787][8] = {0};

+CBC_PDF417CodewordDecoder::CBC_PDF417CodewordDecoder()

+{

+}

+CBC_PDF417CodewordDecoder::~CBC_PDF417CodewordDecoder()

+{

+}

+void CBC_PDF417CodewordDecoder::Initialize()

+{

+    for (FX_INT32 i = 0; i < SYMBOL_TABLE_Length; i++) {

+        FX_INT32 currentSymbol = CBC_PDF417Common::SYMBOL_TABLE[i];

+        FX_INT32 currentBit = currentSymbol & 0x1;

+        for (FX_INT32 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()

+{

+}

+FX_INT32 CBC_PDF417CodewordDecoder::getDecodedValue(CFX_Int32Array& moduleBitCount)

+{

+    CFX_Int32Array* array = sampleBitCounts(moduleBitCount);

+    FX_INT32 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 = FX_NEW CFX_Int32Array();

+    bitCount->SetSize(CBC_PDF417Common::BARS_IN_MODULE);

+    FX_INT32 bitCountIndex = 0;

+    FX_INT32 sumPreviousBits = 0;

+    for (FX_INT32 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;

+}

+FX_INT32 CBC_PDF417CodewordDecoder::getDecodedCodewordValue(CFX_Int32Array& moduleBitCount)

+{

+    FX_INT32 decodedValue = getBitValue(moduleBitCount);

+    return CBC_PDF417Common::getCodeword(decodedValue) == -1 ? -1 : decodedValue;

+}

+FX_INT32 CBC_PDF417CodewordDecoder::getBitValue(CFX_Int32Array& moduleBitCount)

+{

+    FX_INT64 result = 0;

+    for (FX_INT32 i = 0; i < moduleBitCount.GetSize(); i++) {

+        for (FX_INT32 bit = 0; bit < moduleBitCount.GetAt(i); bit++) {

+            result = (result << 1) | (i % 2 == 0 ? 1 : 0);

+        }

+    }

+    return (FX_INT32) result;

+}

+FX_INT32 CBC_PDF417CodewordDecoder::getClosestDecodedValue(CFX_Int32Array& moduleBitCount)

+{

+    FX_INT32 bitCountSum = CBC_PDF417Common::getBitCountSum(moduleBitCount);

+    CFX_FloatArray bitCountRatios;

+    bitCountRatios.SetSize(CBC_PDF417Common::BARS_IN_MODULE);

+    for (FX_INT32 i = 0; i < bitCountRatios.GetSize(); i++) {

+        bitCountRatios[i] = moduleBitCount.GetAt(i) / (FX_FLOAT) bitCountSum;

+    }

+    FX_FLOAT bestMatchError = (FX_FLOAT)Float_MAX_VALUE;

+    FX_INT32 bestMatch = -1;

+    for (FX_INT32 j = 0; j < SYMBOL_TABLE_Length; j++) {

+        FX_FLOAT error = 0.0f;

+        for (FX_INT32 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;

+}