* Code128Reader.cpp
* ZXing
*
- * Created by Lukasz Warchol on 10-01-15.
* Copyright 2010 ZXing authors All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
namespace zxing {
namespace oned {
-
+
const int CODE_PATTERNS_LENGTH = 107;
const int countersLength = 6;
static const int CODE_PATTERNS[CODE_PATTERNS_LENGTH][countersLength] = {
{2, 1, 1, 2, 3, 2}, /* 105 */
{2, 3, 3, 1, 1, 1}
};
-
-
+
+
Code128Reader::Code128Reader(){
}
-
+
int* Code128Reader::findStartPattern(Ref<BitArray> row){
int width = row->getSize();
int rowOffset = 0;
}
rowOffset++;
}
-
+
int counterPosition = 0;
int counters[countersLength] = {0,0,0,0,0,0};
int patternStart = rowOffset;
bool isWhite = false;
int patternLength = sizeof(counters) / sizeof(int);
-
+
for (int i = rowOffset; i < width; i++) {
bool pixel = row->get(i);
if (pixel ^ isWhite) {
unsigned int bestVariance = MAX_AVG_VARIANCE;
int bestMatch = -1;
for (int startCode = CODE_START_A; startCode <= CODE_START_C; startCode++) {
- unsigned int variance = patternMatchVariance(counters, sizeof(counters)/sizeof(int), CODE_PATTERNS[startCode], MAX_INDIVIDUAL_VARIANCE);
+ unsigned int variance = patternMatchVariance(counters, sizeof(counters) / sizeof(int),
+ CODE_PATTERNS[startCode], MAX_INDIVIDUAL_VARIANCE);
if (variance < bestVariance) {
bestVariance = variance;
bestMatch = startCode;
}
if (bestMatch >= 0) {
// Look for whitespace before start pattern, >= 50% of width of start pattern
- if (row->isRange(fmaxl(0, patternStart - (i - patternStart) / 2), patternStart, false)) {
+ if (row->isRange(fmaxl(0, patternStart - (i - patternStart) / 2), patternStart,
+ false)) {
int* resultValue = new int[3];
resultValue[0] = patternStart;
resultValue[1] = i;
}
throw ReaderException("");
}
-
- int Code128Reader::decodeCode(Ref<BitArray> row, int counters[], int countersCount, int rowOffset){
+
+ int Code128Reader::decodeCode(Ref<BitArray> row, int counters[], int countersCount,
+ int rowOffset){
recordPattern(row, rowOffset, counters, countersCount);
unsigned int bestVariance = MAX_AVG_VARIANCE; // worst variance we'll accept
int bestMatch = -1;
for (int d = 0; d < CODE_PATTERNS_LENGTH; d++) {
int pattern[countersLength];
-
+
for(int ind = 0; ind< countersLength; ind++){
pattern[ind] = CODE_PATTERNS[d][ind];
}
// memcpy(pattern, CODE_PATTERNS[d], countersLength);
- unsigned int variance = patternMatchVariance(counters, countersCount, pattern, MAX_INDIVIDUAL_VARIANCE);
+ unsigned int variance = patternMatchVariance(counters, countersCount, pattern,
+ MAX_INDIVIDUAL_VARIANCE);
if (variance < bestVariance) {
bestVariance = variance;
bestMatch = d;
throw ReaderException("");
}
}
-
- Ref<Result> Code128Reader::decodeRow(int rowNumber, Ref<BitArray> row){
-
- int* startPatternInfo = findStartPattern(row);
- int startCode = startPatternInfo[2];
- int codeSet;
- switch (startCode) {
- case CODE_START_A:
- codeSet = CODE_CODE_A;
- break;
- case CODE_START_B:
- codeSet = CODE_CODE_B;
- break;
- case CODE_START_C:
- codeSet = CODE_CODE_C;
- break;
- default:
- delete [] startPatternInfo;
- throw ReaderException("");
- }
-
- bool done = false;
- bool isNextShifted = false;
-
- std::string tmpResultString;
- std::stringstream tmpResultSStr; // used if its Code 128C
-
- int lastStart = startPatternInfo[0];
- int nextStart = startPatternInfo[1];
- int counters[countersLength] = {0,0,0,0,0,0};
-
- int lastCode = 0;
- int code = 0;
- int checksumTotal = startCode;
- int multiplier = 0;
- bool lastCharacterWasPrintable = true;
-
- while (!done) {
-
- bool unshift = isNextShifted;
- isNextShifted = false;
-
- // Save off last code
- lastCode = code;
-
- // Decode another code from image
- try {
- code = decodeCode(row, counters, sizeof(counters)/sizeof(int), nextStart);
- } catch (ReaderException re) {
- delete [] startPatternInfo;
- throw re;
- }
-
- // Remember whether the last code was printable or not (excluding CODE_STOP)
- if (code != CODE_STOP) {
- lastCharacterWasPrintable = true;
- }
-
- // Add to checksum computation (if not CODE_STOP of course)
- if (code != CODE_STOP) {
- multiplier++;
- checksumTotal += multiplier * code;
- }
-
- // Advance to where the next code will to start
- lastStart = nextStart;
- int _countersLength = sizeof(counters) / sizeof(int);
- for (int i = 0; i < _countersLength; i++) {
- nextStart += counters[i];
- }
-
- // Take care of illegal start codes
- switch (code) {
- case CODE_START_A:
- case CODE_START_B:
- case CODE_START_C:
- delete [] startPatternInfo;
- throw ReaderException("");
- }
-
- switch (codeSet) {
-
- case CODE_CODE_A:
- if (code < 64) {
- tmpResultString.append(1, (char) (' ' + code));
- } else if (code < 96) {
- tmpResultString.append(1, (char) (code - 64));
- } else {
- // Don't let CODE_STOP, which always appears, affect whether whether we think the last
- // code was printable or not.
- if (code != CODE_STOP) {
- lastCharacterWasPrintable = false;
- }
- switch (code) {
- case CODE_FNC_1:
- case CODE_FNC_2:
- case CODE_FNC_3:
- case CODE_FNC_4_A:
- // do nothing?
- break;
- case CODE_SHIFT:
- isNextShifted = true;
- codeSet = CODE_CODE_B;
- break;
- case CODE_CODE_B:
- codeSet = CODE_CODE_B;
- break;
- case CODE_CODE_C:
- codeSet = CODE_CODE_C;
- break;
- case CODE_STOP:
- done = true;
- break;
- }
- }
- break;
- case CODE_CODE_B:
- if (code < 96) {
- tmpResultString.append(1, (char) (' ' + code));
- } else {
- if (code != CODE_STOP) {
- lastCharacterWasPrintable = false;
- }
- switch (code) {
- case CODE_FNC_1:
- case CODE_FNC_2:
- case CODE_FNC_3:
- case CODE_FNC_4_B:
- // do nothing?
- break;
- case CODE_SHIFT:
- isNextShifted = true;
- codeSet = CODE_CODE_C;
- break;
- case CODE_CODE_A:
- codeSet = CODE_CODE_A;
- break;
- case CODE_CODE_C:
- codeSet = CODE_CODE_C;
- break;
- case CODE_STOP:
- done = true;
- break;
- }
- }
- break;
- case CODE_CODE_C:
- // the code read in this case is the number encoded directly
- if (code < 100) {
- if (code < 10)
- tmpResultSStr << '0';
- tmpResultSStr << code;
- } else {
- if (code != CODE_STOP) {
- lastCharacterWasPrintable = false;
- }
- switch (code) {
- case CODE_FNC_1:
- // do nothing?
- break;
- case CODE_CODE_A:
- codeSet = CODE_CODE_A;
- break;
- case CODE_CODE_B:
- codeSet = CODE_CODE_B;
- break;
- case CODE_STOP:
- done = true;
- break;
- }
- }
- break;
- }
-
- // Unshift back to another code set if we were shifted
- if (unshift) {
- switch (codeSet) {
- case CODE_CODE_A:
- codeSet = CODE_CODE_C;
- break;
- case CODE_CODE_B:
- codeSet = CODE_CODE_A;
- break;
- case CODE_CODE_C:
- codeSet = CODE_CODE_B;
- break;
- }
- }
-
- }
-
- // Check for ample whitespace following pattern, but, to do this we first need to remember that
- // we fudged decoding CODE_STOP since it actually has 7 bars, not 6. There is a black bar left
- // to read off. Would be slightly better to properly read. Here we just skip it:
- int width = row->getSize();
- while (nextStart < width && row->get(nextStart)) {
- nextStart++;
- }
- if (!row->isRange(nextStart, fminl(width, nextStart + (nextStart - lastStart) / 2), false)) {
- delete [] startPatternInfo;
- throw ReaderException("");
- }
-
- // Pull out from sum the value of the penultimate check code
- checksumTotal -= multiplier * lastCode;
- // lastCode is the checksum then:
- if (checksumTotal % 103 != lastCode) {
- delete [] startPatternInfo;
- throw ReaderException("");
- }
-
- if (codeSet == CODE_CODE_C)
- tmpResultString.append(tmpResultSStr.str());
-
- // Need to pull out the check digits from string
- int resultLength = tmpResultString.length();
- // Only bother if the result had at least one character, and if the checksum digit happened to
- // be a printable character. If it was just interpreted as a control code, nothing to remove.
- if (resultLength > 0 && lastCharacterWasPrintable) {
- if (codeSet == CODE_CODE_C) {
- tmpResultString.erase(resultLength - 2, resultLength);
- } else {
- tmpResultString.erase(resultLength - 1, resultLength);
- }
- }
-
- Ref<String> resultString(new String(tmpResultString));
-// String resultString(tmpResultString);
-
- if (tmpResultString.length() == 0) {
- delete [] startPatternInfo;
- // Almost surely a false positive
- throw ReaderException("");
+
+ Ref<Result> Code128Reader::decodeRow(int rowNumber, Ref<BitArray> row) {
+ int* startPatternInfo = NULL;
+ try {
+ startPatternInfo = findStartPattern(row);
+ int startCode = startPatternInfo[2];
+ int codeSet;
+ switch (startCode) {
+ case CODE_START_A:
+ codeSet = CODE_CODE_A;
+ break;
+ case CODE_START_B:
+ codeSet = CODE_CODE_B;
+ break;
+ case CODE_START_C:
+ codeSet = CODE_CODE_C;
+ break;
+ default:
+ throw ReaderException("");
+ }
+
+ bool done = false;
+ bool isNextShifted = false;
+
+ std::string tmpResultString;
+ std::stringstream tmpResultSStr; // used if its Code 128C
+
+ int lastStart = startPatternInfo[0];
+ int nextStart = startPatternInfo[1];
+ int counters[countersLength] = {0,0,0,0,0,0};
+
+ int lastCode = 0;
+ int code = 0;
+ int checksumTotal = startCode;
+ int multiplier = 0;
+ bool lastCharacterWasPrintable = true;
+
+ while (!done) {
+ bool unshift = isNextShifted;
+ isNextShifted = false;
+
+ // Save off last code
+ lastCode = code;
+
+ // Decode another code from image
+ try {
+ code = decodeCode(row, counters, sizeof(counters)/sizeof(int), nextStart);
+ } catch (ReaderException re) {
+ throw re;
+ }
+
+ // Remember whether the last code was printable or not (excluding CODE_STOP)
+ if (code != CODE_STOP) {
+ lastCharacterWasPrintable = true;
+ }
+
+ // Add to checksum computation (if not CODE_STOP of course)
+ if (code != CODE_STOP) {
+ multiplier++;
+ checksumTotal += multiplier * code;
+ }
+
+ // Advance to where the next code will to start
+ lastStart = nextStart;
+ int _countersLength = sizeof(counters) / sizeof(int);
+ for (int i = 0; i < _countersLength; i++) {
+ nextStart += counters[i];
+ }
+
+ // Take care of illegal start codes
+ switch (code) {
+ case CODE_START_A:
+ case CODE_START_B:
+ case CODE_START_C:
+ throw ReaderException("");
+ }
+
+ switch (codeSet) {
+
+ case CODE_CODE_A:
+ if (code < 64) {
+ tmpResultString.append(1, (char) (' ' + code));
+ } else if (code < 96) {
+ tmpResultString.append(1, (char) (code - 64));
+ } else {
+ // Don't let CODE_STOP, which always appears, affect whether whether we think the
+ // last code was printable or not.
+ if (code != CODE_STOP) {
+ lastCharacterWasPrintable = false;
+ }
+ switch (code) {
+ case CODE_FNC_1:
+ case CODE_FNC_2:
+ case CODE_FNC_3:
+ case CODE_FNC_4_A:
+ // do nothing?
+ break;
+ case CODE_SHIFT:
+ isNextShifted = true;
+ codeSet = CODE_CODE_B;
+ break;
+ case CODE_CODE_B:
+ codeSet = CODE_CODE_B;
+ break;
+ case CODE_CODE_C:
+ codeSet = CODE_CODE_C;
+ break;
+ case CODE_STOP:
+ done = true;
+ break;
+ }
+ }
+ break;
+ case CODE_CODE_B:
+ if (code < 96) {
+ tmpResultString.append(1, (char) (' ' + code));
+ } else {
+ if (code != CODE_STOP) {
+ lastCharacterWasPrintable = false;
+ }
+ switch (code) {
+ case CODE_FNC_1:
+ case CODE_FNC_2:
+ case CODE_FNC_3:
+ case CODE_FNC_4_B:
+ // do nothing?
+ break;
+ case CODE_SHIFT:
+ isNextShifted = true;
+ codeSet = CODE_CODE_C;
+ break;
+ case CODE_CODE_A:
+ codeSet = CODE_CODE_A;
+ break;
+ case CODE_CODE_C:
+ codeSet = CODE_CODE_C;
+ break;
+ case CODE_STOP:
+ done = true;
+ break;
+ }
+ }
+ break;
+ case CODE_CODE_C:
+ // the code read in this case is the number encoded directly
+ if (code < 100) {
+ if (code < 10)
+ tmpResultSStr << '0';
+ tmpResultSStr << code;
+ } else {
+ if (code != CODE_STOP) {
+ lastCharacterWasPrintable = false;
+ }
+ switch (code) {
+ case CODE_FNC_1:
+ // do nothing?
+ break;
+ case CODE_CODE_A:
+ codeSet = CODE_CODE_A;
+ break;
+ case CODE_CODE_B:
+ codeSet = CODE_CODE_B;
+ break;
+ case CODE_STOP:
+ done = true;
+ break;
+ }
+ }
+ break;
+ }
+
+ // Unshift back to another code set if we were shifted
+ if (unshift) {
+ switch (codeSet) {
+ case CODE_CODE_A:
+ codeSet = CODE_CODE_C;
+ break;
+ case CODE_CODE_B:
+ codeSet = CODE_CODE_A;
+ break;
+ case CODE_CODE_C:
+ codeSet = CODE_CODE_B;
+ break;
+ }
+ }
+
+ }
+
+ // Check for ample whitespace following pattern, but, to do this we first need to remember that
+ // we fudged decoding CODE_STOP since it actually has 7 bars, not 6. There is a black bar left
+ // to read off. Would be slightly better to properly read. Here we just skip it:
+ int width = row->getSize();
+ while (nextStart < width && row->get(nextStart)) {
+ nextStart++;
+ }
+ if (!row->isRange(nextStart, fminl(width, nextStart + (nextStart - lastStart) / 2), false)) {
+ throw ReaderException("");
+ }
+
+ // Pull out from sum the value of the penultimate check code
+ checksumTotal -= multiplier * lastCode;
+ // lastCode is the checksum then:
+ if (checksumTotal % 103 != lastCode) {
+ throw ReaderException("");
+ }
+
+ if (codeSet == CODE_CODE_C)
+ tmpResultString.append(tmpResultSStr.str());
+
+ // Need to pull out the check digits from string
+ int resultLength = tmpResultString.length();
+ // Only bother if the result had at least one character, and if the checksum digit happened to
+ // be a printable character. If it was just interpreted as a control code, nothing to remove.
+ if (resultLength > 0 && lastCharacterWasPrintable) {
+ if (codeSet == CODE_CODE_C) {
+ tmpResultString.erase(resultLength - 2, resultLength);
+ } else {
+ tmpResultString.erase(resultLength - 1, resultLength);
+ }
+ }
+
+ Ref<String> resultString(new String(tmpResultString));
+ if (tmpResultString.length() == 0) {
+ // Almost surely a false positive
+ throw ReaderException("");
+ }
+
+ float left = (float) (startPatternInfo[1] + startPatternInfo[0]) / 2.0f;
+ float right = (float) (nextStart + lastStart) / 2.0f;
+
+ std::vector< Ref<ResultPoint> > resultPoints(2);
+ Ref<OneDResultPoint> resultPoint1(new OneDResultPoint(left, (float) rowNumber));
+ Ref<OneDResultPoint> resultPoint2(new OneDResultPoint(right, (float) rowNumber));
+ resultPoints[0] = resultPoint1;
+ resultPoints[1] = resultPoint2;
+
+ delete [] startPatternInfo;
+ ArrayRef<unsigned char> resultBytes(1);
+ return Ref<Result>(new Result(resultString, resultBytes, resultPoints,
+ BarcodeFormat_CODE_128));
+ } catch (ReaderException const& re) {
+ delete [] startPatternInfo;
+ return Ref<Result>();
}
-
- float left = (float) (startPatternInfo[1] + startPatternInfo[0]) / 2.0f;
- float right = (float) (nextStart + lastStart) / 2.0f;
-
- std::vector< Ref<ResultPoint> > resultPoints(2);
- Ref<OneDResultPoint> resultPoint1(new OneDResultPoint(left, (float) rowNumber));
- Ref<OneDResultPoint> resultPoint2(new OneDResultPoint(right, (float) rowNumber));
- resultPoints[0] = resultPoint1;
- resultPoints[1] = resultPoint2;
-
- ArrayRef<unsigned char> resultBytes(1);
-
- delete [] startPatternInfo;
- startPatternInfo = NULL;
-
- Ref<Result> res(new Result(resultString, resultBytes, resultPoints, BarcodeFormat_CODE_128));
- return res;
}
-
+
void Code128Reader::append(char* s, char c){
int len = strlen(s);
s[len] = c;
s[len + 1] = '\0';
}
-
+
Code128Reader::~Code128Reader(){
}
}
projects / zxing.git / blobdiff