Java Code Examples for com.google.zxing.common.BitSource#available()
The following examples show how to use
com.google.zxing.common.BitSource#available() .
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Example 1
| Source File: DecodedBitStreamParser.java From weex with Apache License 2.0 | 5 votes |
|
/**
* See ISO 16022:2006, 5.2.7
*/
private static void decodeAnsiX12Segment(BitSource bits,
StringBuilder result) throws FormatException {
// Three ANSI X12 values are encoded in a 16-bit value as
// (1600 * C1) + (40 * C2) + C3 + 1
int[] cValues = new int[3];
do {
// If there is only one byte left then it will be encoded as ASCII
if (bits.available() == 8) {
return;
}
int firstByte = bits.readBits(8);
if (firstByte == 254) { // Unlatch codeword
return;
}
parseTwoBytes(firstByte, bits.readBits(8), cValues);
for (int i = 0; i < 3; i++) {
int cValue = cValues[i];
if (cValue == 0) { // X12 segment terminator <CR>
result.append('\r');
} else if (cValue == 1) { // X12 segment separator *
result.append('*');
} else if (cValue == 2) { // X12 sub-element separator >
result.append('>');
} else if (cValue == 3) { // space
result.append(' ');
} else if (cValue < 14) { // 0 - 9
result.append((char) (cValue + 44));
} else if (cValue < 40) { // A - Z
result.append((char) (cValue + 51));
} else {
throw FormatException.getFormatInstance();
}
}
} while (bits.available() > 0);
}
Example 2
| Source File: DecodedBitStreamParser.java From RipplePower with Apache License 2.0 | 5 votes |
|
private static void decodeNumericSegment(BitSource bits, StringBuilder result, int count) throws FormatException {
// Read three digits at a time
while (count >= 3) {
// Each 10 bits encodes three digits
if (bits.available() < 10) {
throw FormatException.getFormatInstance();
}
int threeDigitsBits = bits.readBits(10);
if (threeDigitsBits >= 1000) {
throw FormatException.getFormatInstance();
}
result.append(toAlphaNumericChar(threeDigitsBits / 100));
result.append(toAlphaNumericChar((threeDigitsBits / 10) % 10));
result.append(toAlphaNumericChar(threeDigitsBits % 10));
count -= 3;
}
if (count == 2) {
// Two digits left over to read, encoded in 7 bits
if (bits.available() < 7) {
throw FormatException.getFormatInstance();
}
int twoDigitsBits = bits.readBits(7);
if (twoDigitsBits >= 100) {
throw FormatException.getFormatInstance();
}
result.append(toAlphaNumericChar(twoDigitsBits / 10));
result.append(toAlphaNumericChar(twoDigitsBits % 10));
} else if (count == 1) {
// One digit left over to read
if (bits.available() < 4) {
throw FormatException.getFormatInstance();
}
int digitBits = bits.readBits(4);
if (digitBits >= 10) {
throw FormatException.getFormatInstance();
}
result.append(toAlphaNumericChar(digitBits));
}
}
Example 3
| Source File: DecodedBitStreamParser.java From reacteu-app with MIT License | 5 votes |
|
private static void decodeByteSegment(BitSource bits,
StringBuilder result,
int count,
CharacterSetECI currentCharacterSetECI,
Collection<byte[]> byteSegments,
Map<DecodeHintType,?> hints) throws FormatException {
// Don't crash trying to read more bits than we have available.
if (count << 3 > bits.available()) {
throw FormatException.getFormatInstance();
}
byte[] readBytes = new byte[count];
for (int i = 0; i < count; i++) {
readBytes[i] = (byte) bits.readBits(8);
}
String encoding;
if (currentCharacterSetECI == null) {
// The spec isn't clear on this mode; see
// section 6.4.5: t does not say which encoding to assuming
// upon decoding. I have seen ISO-8859-1 used as well as
// Shift_JIS -- without anything like an ECI designator to
// give a hint.
encoding = StringUtils.guessEncoding(readBytes, hints);
} else {
encoding = currentCharacterSetECI.name();
}
try {
result.append(new String(readBytes, encoding));
} catch (UnsupportedEncodingException uce) {
throw FormatException.getFormatInstance();
}
byteSegments.add(readBytes);
}
Example 4
| Source File: DecodedBitStreamParser.java From ZXing-Orient with Apache License 2.0 | 5 votes |
|
/**
* See ISO 16022:2006, 5.2.7
*/
private static void decodeAnsiX12Segment(BitSource bits,
StringBuilder result) throws FormatException {
// Three ANSI X12 values are encoded in a 16-bit value as
// (1600 * C1) + (40 * C2) + C3 + 1
int[] cValues = new int[3];
do {
// If there is only one byte left then it will be encoded as ASCII
if (bits.available() == 8) {
return;
}
int firstByte = bits.readBits(8);
if (firstByte == 254) { // Unlatch codeword
return;
}
parseTwoBytes(firstByte, bits.readBits(8), cValues);
for (int i = 0; i < 3; i++) {
int cValue = cValues[i];
if (cValue == 0) { // X12 segment terminator <CR>
result.append('\r');
} else if (cValue == 1) { // X12 segment separator *
result.append('*');
} else if (cValue == 2) { // X12 sub-element separator >
result.append('>');
} else if (cValue == 3) { // space
result.append(' ');
} else if (cValue < 14) { // 0 - 9
result.append((char) (cValue + 44));
} else if (cValue < 40) { // A - Z
result.append((char) (cValue + 51));
} else {
throw FormatException.getFormatInstance();
}
}
} while (bits.available() > 0);
}
Example 5
| Source File: DecodedBitStreamParser.java From reacteu-app with MIT License | 5 votes |
|
/**
* See ISO 16022:2006, 5.2.8 and Annex C Table C.3
*/
private static void decodeEdifactSegment(BitSource bits, StringBuilder result) {
do {
// If there is only two or less bytes left then it will be encoded as ASCII
if (bits.available() <= 16) {
return;
}
for (int i = 0; i < 4; i++) {
int edifactValue = bits.readBits(6);
// Check for the unlatch character
if (edifactValue == 0x1F) { // 011111
// Read rest of byte, which should be 0, and stop
int bitsLeft = 8 - bits.getBitOffset();
if (bitsLeft != 8) {
bits.readBits(bitsLeft);
}
return;
}
if ((edifactValue & 0x20) == 0) { // no 1 in the leading (6th) bit
edifactValue |= 0x40; // Add a leading 01 to the 6 bit binary value
}
result.append((char) edifactValue);
}
} while (bits.available() > 0);
}
Example 6
| Source File: DecodedBitStreamParser.java From analyzer-of-android-for-Apache-Weex with Apache License 2.0 | 5 votes |
|
/**
* See specification GBT 18284-2000
*/
private static void decodeHanziSegment(BitSource bits,
StringBuilder result,
int count) throws FormatException {
// Don't crash trying to read more bits than we have available.
if (count * 13 > bits.available()) {
throw FormatException.getFormatInstance();
}
// Each character will require 2 bytes. Read the characters as 2-byte pairs
// and decode as GB2312 afterwards
byte[] buffer = new byte[2 * count];
int offset = 0;
while (count > 0) {
// Each 13 bits encodes a 2-byte character
int twoBytes = bits.readBits(13);
int assembledTwoBytes = ((twoBytes / 0x060) << 8) | (twoBytes % 0x060);
if (assembledTwoBytes < 0x003BF) {
// In the 0xA1A1 to 0xAAFE range
assembledTwoBytes += 0x0A1A1;
} else {
// In the 0xB0A1 to 0xFAFE range
assembledTwoBytes += 0x0A6A1;
}
buffer[offset] = (byte) ((assembledTwoBytes >> 8) & 0xFF);
buffer[offset + 1] = (byte) (assembledTwoBytes & 0xFF);
offset += 2;
count--;
}
try {
result.append(new String(buffer, StringUtils.GB2312));
} catch (UnsupportedEncodingException ignored) {
throw FormatException.getFormatInstance();
}
}
Example 7
| Source File: DecodedBitStreamParser.java From Tesseract-OCR-Scanner with Apache License 2.0 | 5 votes |
|
private static void decodeByteSegment(BitSource bits,
StringBuilder result,
int count,
CharacterSetECI currentCharacterSetECI,
Collection<byte[]> byteSegments,
Map<DecodeHintType,?> hints) throws FormatException {
// Don't crash trying to read more bits than we have available.
if (8 * count > bits.available()) {
throw FormatException.getFormatInstance();
}
byte[] readBytes = new byte[count];
for (int i = 0; i < count; i++) {
readBytes[i] = (byte) bits.readBits(8);
}
String encoding;
if (currentCharacterSetECI == null) {
// The spec isn't clear on this mode; see
// section 6.4.5: t does not say which encoding to assuming
// upon decoding. I have seen ISO-8859-1 used as well as
// Shift_JIS -- without anything like an ECI designator to
// give a hint.
encoding = StringUtils.guessEncoding(readBytes, hints);
} else {
encoding = currentCharacterSetECI.name();
}
try {
result.append(new String(readBytes, encoding));
} catch (UnsupportedEncodingException ignored) {
throw FormatException.getFormatInstance();
}
byteSegments.add(readBytes);
}
Example 8
| Source File: DecodedBitStreamParser.java From barcodescanner-lib-aar with MIT License | 5 votes |
|
/**
* See ISO 16022:2006, 5.2.9 and Annex B, B.2
*/
private static void decodeBase256Segment(BitSource bits,
StringBuilder result,
Collection<byte[]> byteSegments)
throws FormatException {
// Figure out how long the Base 256 Segment is.
int codewordPosition = 1 + bits.getByteOffset(); // position is 1-indexed
int d1 = unrandomize255State(bits.readBits(8), codewordPosition++);
int count;
if (d1 == 0) { // Read the remainder of the symbol
count = bits.available() / 8;
} else if (d1 < 250) {
count = d1;
} else {
count = 250 * (d1 - 249) + unrandomize255State(bits.readBits(8), codewordPosition++);
}
// We're seeing NegativeArraySizeException errors from users.
if (count < 0) {
throw FormatException.getFormatInstance();
}
byte[] bytes = new byte[count];
for (int i = 0; i < count; i++) {
// Have seen this particular error in the wild, such as at
// http://www.bcgen.com/demo/IDAutomationStreamingDataMatrix.aspx?MODE=3&D=Fred&PFMT=3&PT=F&X=0.3&O=0&LM=0.2
if (bits.available() < 8) {
throw FormatException.getFormatInstance();
}
bytes[i] = (byte) unrandomize255State(bits.readBits(8), codewordPosition++);
}
byteSegments.add(bytes);
try {
result.append(new String(bytes, "ISO8859_1"));
} catch (UnsupportedEncodingException uee) {
throw new IllegalStateException("Platform does not support required encoding: " + uee);
}
}
Example 9
| Source File: c.java From MiBandDecompiled with Apache License 2.0 | 5 votes |
|
private static void d(BitSource bitsource, StringBuilder stringbuilder)
{
boolean flag = false;
do
{
if (bitsource.available() <= 16)
{
return;
}
int i = 0;
while (i < 4)
{
int j = bitsource.readBits(6);
boolean flag1;
if (j == 31)
{
flag1 = true;
} else
{
flag1 = flag;
}
if (!flag1)
{
int k;
if ((j & 0x20) == 0)
{
k = j | 0x40;
} else
{
k = j;
}
stringbuilder.append((char)k);
}
i++;
flag = flag1;
}
} while (!flag && bitsource.available() > 0);
}
Example 10
| Source File: DecodedBitStreamParser.java From reacteu-app with MIT License | 5 votes |
|
private static void decodeKanjiSegment(BitSource bits,
StringBuilder result,
int count) throws FormatException {
// Don't crash trying to read more bits than we have available.
if (count * 13 > bits.available()) {
throw FormatException.getFormatInstance();
}
// Each character will require 2 bytes. Read the characters as 2-byte pairs
// and decode as Shift_JIS afterwards
byte[] buffer = new byte[2 * count];
int offset = 0;
while (count > 0) {
// Each 13 bits encodes a 2-byte character
int twoBytes = bits.readBits(13);
int assembledTwoBytes = ((twoBytes / 0x0C0) << 8) | (twoBytes % 0x0C0);
if (assembledTwoBytes < 0x01F00) {
// In the 0x8140 to 0x9FFC range
assembledTwoBytes += 0x08140;
} else {
// In the 0xE040 to 0xEBBF range
assembledTwoBytes += 0x0C140;
}
buffer[offset] = (byte) (assembledTwoBytes >> 8);
buffer[offset + 1] = (byte) assembledTwoBytes;
offset += 2;
count--;
}
// Shift_JIS may not be supported in some environments:
try {
result.append(new String(buffer, StringUtils.SHIFT_JIS));
} catch (UnsupportedEncodingException uee) {
throw FormatException.getFormatInstance();
}
}
Example 11
| Source File: DecodedBitStreamParser.java From RipplePower with Apache License 2.0 | 5 votes |
|
private static void decodeByteSegment(BitSource bits, StringBuilder result, int count,
CharacterSetECI currentCharacterSetECI, Collection<byte[]> byteSegments, Map<DecodeHintType, ?> hints)
throws FormatException {
// Don't crash trying to read more bits than we have available.
if (8 * count > bits.available()) {
throw FormatException.getFormatInstance();
}
byte[] readBytes = new byte[count];
for (int i = 0; i < count; i++) {
readBytes[i] = (byte) bits.readBits(8);
}
String encoding;
if (currentCharacterSetECI == null) {
// The spec isn't clear on this mode; see
// section 6.4.5: t does not say which encoding to assuming
// upon decoding. I have seen ISO-8859-1 used as well as
// Shift_JIS -- without anything like an ECI designator to
// give a hint.
encoding = StringUtils.guessEncoding(readBytes, hints);
} else {
encoding = currentCharacterSetECI.name();
}
try {
result.append(new String(readBytes, encoding));
} catch (UnsupportedEncodingException ignored) {
throw FormatException.getFormatInstance();
}
byteSegments.add(readBytes);
}
Example 12
| Source File: DecodedBitStreamParser.java From RipplePower with Apache License 2.0 | 4 votes |
|
/**
* See ISO 16022:2006, 5.2.3 and Annex C, Table C.2
*/
private static Mode decodeAsciiSegment(BitSource bits, StringBuilder result, StringBuilder resultTrailer)
throws FormatException {
boolean upperShift = false;
do {
int oneByte = bits.readBits(8);
if (oneByte == 0) {
throw FormatException.getFormatInstance();
} else if (oneByte <= 128) { // ASCII data (ASCII value + 1)
if (upperShift) {
oneByte += 128;
// upperShift = false;
}
result.append((char) (oneByte - 1));
return Mode.ASCII_ENCODE;
} else if (oneByte == 129) { // Pad
return Mode.PAD_ENCODE;
} else if (oneByte <= 229) { // 2-digit data 00-99 (Numeric Value +
// 130)
int value = oneByte - 130;
if (value < 10) { // padd with '0' for single digit values
result.append('0');
}
result.append(value);
} else if (oneByte == 230) { // Latch to C40 encodation
return Mode.C40_ENCODE;
} else if (oneByte == 231) { // Latch to Base 256 encodation
return Mode.BASE256_ENCODE;
} else if (oneByte == 232) {
// FNC1
result.append((char) 29); // translate as ASCII 29
} else if (oneByte == 233 || oneByte == 234) {
// Structured Append, Reader Programming
// Ignore these symbols for now
// throw ReaderException.getInstance();
} else if (oneByte == 235) { // Upper Shift (shift to Extended
// ASCII)
upperShift = true;
} else if (oneByte == 236) { // 05 Macro
result.append("[)>\u001E05\u001D");
resultTrailer.insert(0, "\u001E\u0004");
} else if (oneByte == 237) { // 06 Macro
result.append("[)>\u001E06\u001D");
resultTrailer.insert(0, "\u001E\u0004");
} else if (oneByte == 238) { // Latch to ANSI X12 encodation
return Mode.ANSIX12_ENCODE;
} else if (oneByte == 239) { // Latch to Text encodation
return Mode.TEXT_ENCODE;
} else if (oneByte == 240) { // Latch to EDIFACT encodation
return Mode.EDIFACT_ENCODE;
} else if (oneByte == 241) { // ECI Character
// TODO(bbrown): I think we need to support ECI
// throw ReaderException.getInstance();
// Ignore this symbol for now
} else if (oneByte >= 242) { // Not to be used in ASCII encodation
// ... but work around encoders that end with 254, latch back to
// ASCII
if (oneByte != 254 || bits.available() != 0) {
throw FormatException.getFormatInstance();
}
}
} while (bits.available() > 0);
return Mode.ASCII_ENCODE;
}
Example 13
| Source File: DecodedBitStreamParser.java From analyzer-of-android-for-Apache-Weex with Apache License 2.0 | 4 votes |
|
private static void decodeNumericSegment(BitSource bits,
StringBuilder result,
int count) throws FormatException {
// Read three digits at a time
while (count >= 3) {
// Each 10 bits encodes three digits
if (bits.available() < 10) {
throw FormatException.getFormatInstance();
}
int threeDigitsBits = bits.readBits(10);
if (threeDigitsBits >= 1000) {
throw FormatException.getFormatInstance();
}
result.append(toAlphaNumericChar(threeDigitsBits / 100));
result.append(toAlphaNumericChar((threeDigitsBits / 10) % 10));
result.append(toAlphaNumericChar(threeDigitsBits % 10));
count -= 3;
}
if (count == 2) {
// Two digits left over to read, encoded in 7 bits
if (bits.available() < 7) {
throw FormatException.getFormatInstance();
}
int twoDigitsBits = bits.readBits(7);
if (twoDigitsBits >= 100) {
throw FormatException.getFormatInstance();
}
result.append(toAlphaNumericChar(twoDigitsBits / 10));
result.append(toAlphaNumericChar(twoDigitsBits % 10));
} else if (count == 1) {
// One digit left over to read
if (bits.available() < 4) {
throw FormatException.getFormatInstance();
}
int digitBits = bits.readBits(4);
if (digitBits >= 10) {
throw FormatException.getFormatInstance();
}
result.append(toAlphaNumericChar(digitBits));
}
}
Example 14
| Source File: DecodedBitStreamParser.java From Telegram-FOSS with GNU General Public License v2.0 | 4 votes |
|
static DecoderResult decode(byte[] bytes,
Version version,
ErrorCorrectionLevel ecLevel,
Map<DecodeHintType,?> hints) throws FormatException {
BitSource bits = new BitSource(bytes);
StringBuilder result = new StringBuilder(50);
List<byte[]> byteSegments = new ArrayList<>(1);
int symbolSequence = -1;
int parityData = -1;
try {
CharacterSetECI currentCharacterSetECI = null;
boolean fc1InEffect = false;
Mode mode;
do {
// While still another segment to read...
if (bits.available() < 4) {
// OK, assume we're done. Really, a TERMINATOR mode should have been recorded here
mode = Mode.TERMINATOR;
} else {
mode = Mode.forBits(bits.readBits(4)); // mode is encoded by 4 bits
}
switch (mode) {
case TERMINATOR:
break;
case FNC1_FIRST_POSITION:
case FNC1_SECOND_POSITION:
// We do little with FNC1 except alter the parsed result a bit according to the spec
fc1InEffect = true;
break;
case STRUCTURED_APPEND:
if (bits.available() < 16) {
throw FormatException.getFormatInstance();
}
// sequence number and parity is added later to the result metadata
// Read next 8 bits (symbol sequence #) and 8 bits (parity data), then continue
symbolSequence = bits.readBits(8);
parityData = bits.readBits(8);
break;
case ECI:
// Count doesn't apply to ECI
int value = parseECIValue(bits);
currentCharacterSetECI = CharacterSetECI.getCharacterSetECIByValue(value);
if (currentCharacterSetECI == null) {
throw FormatException.getFormatInstance();
}
break;
case HANZI:
// First handle Hanzi mode which does not start with character count
// Chinese mode contains a sub set indicator right after mode indicator
int subset = bits.readBits(4);
int countHanzi = bits.readBits(mode.getCharacterCountBits(version));
if (subset == GB2312_SUBSET) {
decodeHanziSegment(bits, result, countHanzi);
}
break;
default:
// "Normal" QR code modes:
// How many characters will follow, encoded in this mode?
int count = bits.readBits(mode.getCharacterCountBits(version));
switch (mode) {
case NUMERIC:
decodeNumericSegment(bits, result, count);
break;
case ALPHANUMERIC:
decodeAlphanumericSegment(bits, result, count, fc1InEffect);
break;
case BYTE:
decodeByteSegment(bits, result, count, currentCharacterSetECI, byteSegments, hints);
break;
case KANJI:
decodeKanjiSegment(bits, result, count);
break;
default:
throw FormatException.getFormatInstance();
}
break;
}
} while (mode != Mode.TERMINATOR);
} catch (IllegalArgumentException iae) {
// from readBits() calls
throw FormatException.getFormatInstance();
}
return new DecoderResult(bytes,
result.toString(),
byteSegments.isEmpty() ? null : byteSegments,
ecLevel == null ? null : ecLevel.toString(),
symbolSequence,
parityData);
}
Example 15
| Source File: DecodedBitStreamParser.java From RipplePower with Apache License 2.0 | 4 votes |
|
static DecoderResult decode(byte[] bytes, Version version, ErrorCorrectionLevel ecLevel,
Map<DecodeHintType, ?> hints) throws FormatException {
BitSource bits = new BitSource(bytes);
StringBuilder result = new StringBuilder(50);
List<byte[]> byteSegments = new ArrayList<>(1);
int symbolSequence = -1;
int parityData = -1;
try {
CharacterSetECI currentCharacterSetECI = null;
boolean fc1InEffect = false;
Mode mode;
do {
// While still another segment to read...
if (bits.available() < 4) {
// OK, assume we're done. Really, a TERMINATOR mode should
// have been recorded here
mode = Mode.TERMINATOR;
} else {
mode = Mode.forBits(bits.readBits(4)); // mode is encoded by
// 4 bits
}
if (mode != Mode.TERMINATOR) {
if (mode == Mode.FNC1_FIRST_POSITION || mode == Mode.FNC1_SECOND_POSITION) {
// We do little with FNC1 except alter the parsed result
// a bit according to the spec
fc1InEffect = true;
} else if (mode == Mode.STRUCTURED_APPEND) {
if (bits.available() < 16) {
throw FormatException.getFormatInstance();
}
// sequence number and parity is added later to the
// result metadata
// Read next 8 bits (symbol sequence #) and 8 bits
// (parity data), then continue
symbolSequence = bits.readBits(8);
parityData = bits.readBits(8);
} else if (mode == Mode.ECI) {
// Count doesn't apply to ECI
int value = parseECIValue(bits);
currentCharacterSetECI = CharacterSetECI.getCharacterSetECIByValue(value);
if (currentCharacterSetECI == null) {
throw FormatException.getFormatInstance();
}
} else {
// First handle Hanzi mode which does not start with
// character count
if (mode == Mode.HANZI) {
// chinese mode contains a sub set indicator right
// after mode indicator
int subset = bits.readBits(4);
int countHanzi = bits.readBits(mode.getCharacterCountBits(version));
if (subset == GB2312_SUBSET) {
decodeHanziSegment(bits, result, countHanzi);
}
} else {
// "Normal" QR code modes:
// How many characters will follow, encoded in this
// mode?
int count = bits.readBits(mode.getCharacterCountBits(version));
if (mode == Mode.NUMERIC) {
decodeNumericSegment(bits, result, count);
} else if (mode == Mode.ALPHANUMERIC) {
decodeAlphanumericSegment(bits, result, count, fc1InEffect);
} else if (mode == Mode.BYTE) {
decodeByteSegment(bits, result, count, currentCharacterSetECI, byteSegments, hints);
} else if (mode == Mode.KANJI) {
decodeKanjiSegment(bits, result, count);
} else {
throw FormatException.getFormatInstance();
}
}
}
}
} while (mode != Mode.TERMINATOR);
} catch (IllegalArgumentException iae) {
// from readBits() calls
throw FormatException.getFormatInstance();
}
return new DecoderResult(bytes, result.toString(), byteSegments.isEmpty() ? null : byteSegments,
ecLevel == null ? null : ecLevel.toString(), symbolSequence, parityData);
}
Example 16
| Source File: DecodedBitStreamParser.java From QrCodeScanner with GNU General Public License v3.0 | 4 votes |
|
static DecoderResult decode(byte[] bytes,
Version version,
ErrorCorrectionLevel ecLevel,
Map<DecodeHintType,?> hints) throws FormatException {
BitSource bits = new BitSource(bytes);
StringBuilder result = new StringBuilder(50);
List<byte[]> byteSegments = new ArrayList<>(1);
int symbolSequence = -1;
int parityData = -1;
try {
CharacterSetECI currentCharacterSetECI = null;
boolean fc1InEffect = false;
Mode mode;
do {
// While still another segment to read...
if (bits.available() < 4) {
// OK, assume we're done. Really, a TERMINATOR mode should have been recorded here
mode = Mode.TERMINATOR;
} else {
mode = Mode.forBits(bits.readBits(4)); // mode is encoded by 4 bits
}
switch (mode) {
case TERMINATOR:
break;
case FNC1_FIRST_POSITION:
case FNC1_SECOND_POSITION:
// We do little with FNC1 except alter the parsed result a bit according to the spec
fc1InEffect = true;
break;
case STRUCTURED_APPEND:
if (bits.available() < 16) {
throw FormatException.getFormatInstance();
}
// sequence number and parity is added later to the result metadata
// Read next 8 bits (symbol sequence #) and 8 bits (parity data), then continue
symbolSequence = bits.readBits(8);
parityData = bits.readBits(8);
break;
case ECI:
// Count doesn't apply to ECI
int value = parseECIValue(bits);
currentCharacterSetECI = CharacterSetECI.getCharacterSetECIByValue(value);
if (currentCharacterSetECI == null) {
throw FormatException.getFormatInstance();
}
break;
case HANZI:
// First handle Hanzi mode which does not start with character count
// Chinese mode contains a sub set indicator right after mode indicator
int subset = bits.readBits(4);
int countHanzi = bits.readBits(mode.getCharacterCountBits(version));
if (subset == GB2312_SUBSET) {
decodeHanziSegment(bits, result, countHanzi);
}
break;
default:
// "Normal" QR code modes:
// How many characters will follow, encoded in this mode?
int count = bits.readBits(mode.getCharacterCountBits(version));
switch (mode) {
case NUMERIC:
decodeNumericSegment(bits, result, count);
break;
case ALPHANUMERIC:
decodeAlphanumericSegment(bits, result, count, fc1InEffect);
break;
case BYTE:
decodeByteSegment(bits, result, count, currentCharacterSetECI, byteSegments, hints);
break;
case KANJI:
decodeKanjiSegment(bits, result, count);
break;
default:
throw FormatException.getFormatInstance();
}
break;
}
} while (mode != Mode.TERMINATOR);
} catch (IllegalArgumentException iae) {
// from readBits() calls
throw FormatException.getFormatInstance();
}
return new DecoderResult(bytes,
result.toString(),
byteSegments.isEmpty() ? null : byteSegments,
ecLevel == null ? null : ecLevel.toString(),
symbolSequence,
parityData);
}
Example 17
| Source File: DecodedBitStreamParser.java From barcodescanner-lib-aar with MIT License | 4 votes |
|
/**
* See ISO 16022:2006, 5.2.3 and Annex C, Table C.2
*/
private static Mode decodeAsciiSegment(BitSource bits,
StringBuilder result,
StringBuilder resultTrailer) throws FormatException {
boolean upperShift = false;
do {
int oneByte = bits.readBits(8);
if (oneByte == 0) {
throw FormatException.getFormatInstance();
} else if (oneByte <= 128) { // ASCII data (ASCII value + 1)
if (upperShift) {
oneByte += 128;
//upperShift = false;
}
result.append((char) (oneByte - 1));
return Mode.ASCII_ENCODE;
} else if (oneByte == 129) { // Pad
return Mode.PAD_ENCODE;
} else if (oneByte <= 229) { // 2-digit data 00-99 (Numeric Value + 130)
int value = oneByte - 130;
if (value < 10) { // pad with '0' for single digit values
result.append('0');
}
result.append(value);
} else if (oneByte == 230) { // Latch to C40 encodation
return Mode.C40_ENCODE;
} else if (oneByte == 231) { // Latch to Base 256 encodation
return Mode.BASE256_ENCODE;
} else if (oneByte == 232) {
// FNC1
result.append((char) 29); // translate as ASCII 29
} else if (oneByte == 233 || oneByte == 234) {
// Structured Append, Reader Programming
// Ignore these symbols for now
//throw ReaderException.getInstance();
} else if (oneByte == 235) { // Upper Shift (shift to Extended ASCII)
upperShift = true;
} else if (oneByte == 236) { // 05 Macro
result.append("[)>\u001E05\u001D");
resultTrailer.insert(0, "\u001E\u0004");
} else if (oneByte == 237) { // 06 Macro
result.append("[)>\u001E06\u001D");
resultTrailer.insert(0, "\u001E\u0004");
} else if (oneByte == 238) { // Latch to ANSI X12 encodation
return Mode.ANSIX12_ENCODE;
} else if (oneByte == 239) { // Latch to Text encodation
return Mode.TEXT_ENCODE;
} else if (oneByte == 240) { // Latch to EDIFACT encodation
return Mode.EDIFACT_ENCODE;
} else if (oneByte == 241) { // ECI Character
// TODO(bbrown): I think we need to support ECI
//throw ReaderException.getInstance();
// Ignore this symbol for now
} else if (oneByte >= 242) { // Not to be used in ASCII encodation
// ... but work around encoders that end with 254, latch back to ASCII
if (oneByte != 254 || bits.available() != 0) {
throw FormatException.getFormatInstance();
}
}
} while (bits.available() > 0);
return Mode.ASCII_ENCODE;
}
Example 18
| Source File: DecodedBitStreamParser.java From Tesseract-OCR-Scanner with Apache License 2.0 | 4 votes |
|
static DecoderResult decode(byte[] bytes,
Version version,
ErrorCorrectionLevel ecLevel,
Map<DecodeHintType,?> hints) throws FormatException {
BitSource bits = new BitSource(bytes);
StringBuilder result = new StringBuilder(50);
List<byte[]> byteSegments = new ArrayList<>(1);
int symbolSequence = -1;
int parityData = -1;
try {
CharacterSetECI currentCharacterSetECI = null;
boolean fc1InEffect = false;
Mode mode;
do {
// While still another segment to read...
if (bits.available() < 4) {
// OK, assume we're done. Really, a TERMINATOR mode should have been recorded here
mode = Mode.TERMINATOR;
} else {
mode = Mode.forBits(bits.readBits(4)); // mode is encoded by 4 bits
}
switch (mode) {
case TERMINATOR:
break;
case FNC1_FIRST_POSITION:
case FNC1_SECOND_POSITION:
// We do little with FNC1 except alter the parsed result a bit according to the spec
fc1InEffect = true;
break;
case STRUCTURED_APPEND:
if (bits.available() < 16) {
throw FormatException.getFormatInstance();
}
// sequence number and parity is added later to the result metadata
// Read next 8 bits (symbol sequence #) and 8 bits (parity data), then continue
symbolSequence = bits.readBits(8);
parityData = bits.readBits(8);
break;
case ECI:
// Count doesn't apply to ECI
int value = parseECIValue(bits);
currentCharacterSetECI = CharacterSetECI.getCharacterSetECIByValue(value);
if (currentCharacterSetECI == null) {
throw FormatException.getFormatInstance();
}
break;
case HANZI:
// First handle Hanzi mode which does not start with character count
// Chinese mode contains a sub set indicator right after mode indicator
int subset = bits.readBits(4);
int countHanzi = bits.readBits(mode.getCharacterCountBits(version));
if (subset == GB2312_SUBSET) {
decodeHanziSegment(bits, result, countHanzi);
}
break;
default:
// "Normal" QR code modes:
// How many characters will follow, encoded in this mode?
int count = bits.readBits(mode.getCharacterCountBits(version));
switch (mode) {
case NUMERIC:
decodeNumericSegment(bits, result, count);
break;
case ALPHANUMERIC:
decodeAlphanumericSegment(bits, result, count, fc1InEffect);
break;
case BYTE:
decodeByteSegment(bits, result, count, currentCharacterSetECI, byteSegments, hints);
break;
case KANJI:
decodeKanjiSegment(bits, result, count);
break;
default:
throw FormatException.getFormatInstance();
}
break;
}
} while (mode != Mode.TERMINATOR);
} catch (IllegalArgumentException iae) {
// from readBits() calls
throw FormatException.getFormatInstance();
}
return new DecoderResult(bytes,
result.toString(),
byteSegments.isEmpty() ? null : byteSegments,
ecLevel == null ? null : ecLevel.toString(),
symbolSequence,
parityData);
}
Example 19
| Source File: DecodedBitStreamParser.java From ScreenCapture with MIT License | 4 votes |
|
private static void decodeNumericSegment(BitSource bits,
StringBuilder result,
int count) throws FormatException {
// Read three digits at a time
while (count >= 3) {
// Each 10 bits encodes three digits
if (bits.available() < 10) {
throw FormatException.getFormatInstance();
}
int threeDigitsBits = bits.readBits(10);
if (threeDigitsBits >= 1000) {
throw FormatException.getFormatInstance();
}
result.append(toAlphaNumericChar(threeDigitsBits / 100));
result.append(toAlphaNumericChar((threeDigitsBits / 10) % 10));
result.append(toAlphaNumericChar(threeDigitsBits % 10));
count -= 3;
}
if (count == 2) {
// Two digits left over to read, encoded in 7 bits
if (bits.available() < 7) {
throw FormatException.getFormatInstance();
}
int twoDigitsBits = bits.readBits(7);
if (twoDigitsBits >= 100) {
throw FormatException.getFormatInstance();
}
result.append(toAlphaNumericChar(twoDigitsBits / 10));
result.append(toAlphaNumericChar(twoDigitsBits % 10));
} else if (count == 1) {
// One digit left over to read
if (bits.available() < 4) {
throw FormatException.getFormatInstance();
}
int digitBits = bits.readBits(4);
if (digitBits >= 10) {
throw FormatException.getFormatInstance();
}
result.append(toAlphaNumericChar(digitBits));
}
}
Example 20
| Source File: DecodedBitStreamParser.java From weex with Apache License 2.0 | 4 votes |
|
private static void decodeNumericSegment(BitSource bits,
StringBuilder result,
int count) throws FormatException {
// Read three digits at a time
while (count >= 3) {
// Each 10 bits encodes three digits
if (bits.available() < 10) {
throw FormatException.getFormatInstance();
}
int threeDigitsBits = bits.readBits(10);
if (threeDigitsBits >= 1000) {
throw FormatException.getFormatInstance();
}
result.append(toAlphaNumericChar(threeDigitsBits / 100));
result.append(toAlphaNumericChar((threeDigitsBits / 10) % 10));
result.append(toAlphaNumericChar(threeDigitsBits % 10));
count -= 3;
}
if (count == 2) {
// Two digits left over to read, encoded in 7 bits
if (bits.available() < 7) {
throw FormatException.getFormatInstance();
}
int twoDigitsBits = bits.readBits(7);
if (twoDigitsBits >= 100) {
throw FormatException.getFormatInstance();
}
result.append(toAlphaNumericChar(twoDigitsBits / 10));
result.append(toAlphaNumericChar(twoDigitsBits % 10));
} else if (count == 1) {
// One digit left over to read
if (bits.available() < 4) {
throw FormatException.getFormatInstance();
}
int digitBits = bits.readBits(4);
if (digitBits >= 10) {
throw FormatException.getFormatInstance();
}
result.append(toAlphaNumericChar(digitBits));
}
}
