Examples of net.fec.openrq.decoder.DataDecoder

net.fec.openrq.decoder.DataDecoder

A RaptorQ decoder for a data object.

A decoder receives encoding packets produced by a RaptorQ encoder (as specified by RFC 6330), and decodes the original data object (source data). The source data is divided into a fixed number of source blocks, and each source block can be decoded independently.

A decoder provides methods for parsing/reading encoding packets from various formats. The parsed/read encoding packets must then be forwarded to the right {@link SourceBlockDecoder} object, which takes care of decoding aspecific source block. These decoder objects are accessed via the method {@link #sourceBlock(int)}.

The number of source blocks, the length of the source data and other parameters are specified as the FEC parameters. The method {@link #fecParameters()} provides the associated parameters to the decoder.

    public static Iterable<Object[]> getSBDInfos() {


        final List<Object[]> list = new ArrayList<>();


        final DataEncoder dataEnc = OpenRQ.newEncoder(new byte[FEC_PARAMS.dataLengthAsInt()], FEC_PARAMS);
        final DataDecoder dataDec = OpenRQ.newDecoder(FEC_PARAMS, 0);


        for (SourceBlockDecoder sbDec : dataDec.sourceBlockIterable()) {
            // insert empty decoder
            list.add(new Object[] {sbDec.information(), true});
        }


        for (SourceBlockEncoder sbEnc : dataEnc.sourceBlockIterable()) {
            final int K = sbEnc.numberOfSourceSymbols();
            final SourceBlockDecoder sbDec = dataDec.sourceBlock(sbEnc.sourceBlockNumber());


            for (int n = 0; n < K / 3; n++) {
                final EncodingPacket pac = sbEnc.sourcePacket(n);
                sbDec.putEncodingPacket(pac);
            }

Examples of net.fec.openrq.decoder.DataDecoder

Related Classes of net.fec.openrq.decoder.DataDecoder