/// <summary>
/// <p>Decodes a PDF417 Code represented as a <see cref="BitMatrix" />.
/// A 1 or "true" is taken to mean a black module.</p>
///
/// <param name="bits">booleans representing white/black PDF417 Code modules</param>
/// <returns>text and bytes encoded within the PDF417 Code</returns>
/// <exception cref="FormatException">if the PDF417 Code cannot be decoded</exception>
/// </summary>
public DecoderResult decode(BitMatrix bits)
{
// Construct a parser to read the data codewords and error-correction level
BitMatrixParser parser = new BitMatrixParser(bits);
int[] codewords = parser.readCodewords();
if (codewords == null || codewords.Length == 0)
{
return(null);
}
int ecLevel = parser.getECLevel();
int numECCodewords = 1 << (ecLevel + 1);
int[] erasures = parser.getErasures();
if (!correctErrors(codewords, erasures, numECCodewords))
{
return(null);
}
if (!verifyCodewordCount(codewords, numECCodewords))
{
return(null);
}
// Decode the codewords
return(DecodedBitStreamParser.decode(codewords));
}
/// <summary>
/// <p>Decodes a PDF417 Code represented as a <seealso cref="BitMatrix"/>.
/// A 1 or "true" is taken to mean a black module.</p>
/// </summary>
/// <param name="bits"> booleans representing white/black PDF417 Code modules </param>
/// <returns> text and bytes encoded within the PDF417 Code </returns>
/// <exception cref="FormatException"> if the PDF417 Code cannot be decoded </exception>
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
//ORIGINAL LINE: public com.google.zxing.common.DecoderResult decode(com.google.zxing.common.BitMatrix bits) throws com.google.zxing.FormatException, com.google.zxing.ChecksumException
public DecoderResult decode(BitMatrix bits)
{
// Construct a parser to read the data codewords and error-correction level
BitMatrixParser parser = new BitMatrixParser(bits);
int[] codewords = parser.readCodewords();
if (codewords.Length == 0)
{
throw FormatException.FormatInstance;
}
int ecLevel = parser.ECLevel;
int numECCodewords = 1 << (ecLevel + 1);
int[] erasures = parser.Erasures;
correctErrors(codewords, erasures, numECCodewords);
verifyCodewordCount(codewords, numECCodewords);
// Decode the codewords
return(DecodedBitStreamParser.decode(codewords));
}
/// <summary> <p>Decodes a Data Matrix Code represented as a {@link BitMatrix}. A 1 or "true" is taken
/// to mean a black module.</p>
///
/// </summary>
/// <param name="bits">booleans representing white/black Data Matrix Code modules
/// </param>
/// <returns> text and bytes encoded within the Data Matrix Code
/// </returns>
/// <throws> ReaderException if the Data Matrix Code cannot be decoded </throws>
public DecoderResult decode(BitMatrix bits)
{
// Construct a parser and read version, error-correction level
var parser = new BitMatrixParser(bits);
Version version = parser.readVersion(bits);
// Read codewords
sbyte[] codewords = parser.readCodewords();
// Separate into data blocks
DataBlock[] dataBlocks = DataBlock.getDataBlocks(codewords, version);
// Count total number of data bytes
int totalBytes = 0;
for (int i = 0; i < dataBlocks.Length; i++)
{
totalBytes += dataBlocks[i].NumDataCodewords;
}
var resultBytes = new sbyte[totalBytes];
int resultOffset = 0;
// Error-correct and copy data blocks together into a stream of bytes
for (int j = 0; j < dataBlocks.Length; j++)
{
DataBlock dataBlock = dataBlocks[j];
sbyte[] codewordBytes = dataBlock.Codewords;
int numDataCodewords = dataBlock.NumDataCodewords;
correctErrors(codewordBytes, numDataCodewords);
for (int i = 0; i < numDataCodewords; i++)
{
resultBytes[resultOffset++] = codewordBytes[i];
}
}
// Decode the contents of that stream of bytes
return DecodedBitStreamParser.decode(resultBytes);
}