private DecoderResult decode(BitMatrixParser parser, IDictionary <DecodeHintType, object> hints) { Version version = parser.readVersion(); if (version == null) { return(null); } var formatinfo = parser.readFormatInformation(); if (formatinfo == null) { return(null); } ErrorCorrectionLevel ecLevel = formatinfo.ErrorCorrectionLevel; // Read codewords byte[] codewords = parser.readCodewords(); if (codewords == null) { return(null); } // Separate into data blocks DataBlock[] dataBlocks = DataBlock.getDataBlocks(codewords, version, ecLevel); // Count total number of data bytes int totalBytes = 0; foreach (var dataBlock in dataBlocks) { totalBytes += dataBlock.NumDataCodewords; } byte[] resultBytes = new byte[totalBytes]; int resultOffset = 0; // Error-correct and copy data blocks together into a stream of bytes foreach (var dataBlock in dataBlocks) { byte[] codewordBytes = dataBlock.Codewords; int numDataCodewords = dataBlock.NumDataCodewords; if (!correctErrors(codewordBytes, numDataCodewords)) { return(null); } for (int i = 0; i < numDataCodewords; i++) { resultBytes[resultOffset++] = codewordBytes[i]; } } // Decode the contents of that stream of bytes return(DecodedBitStreamParser.decode(resultBytes, version, ecLevel, hints)); }