Examples of net.fec.openrq.parameters.FECParameters

net.fec.openrq.parameters.FECParameters
This class represents FEC parameters as defined in RFC 6330 as the Encoded FEC Object Transmission Information (OTI), which contains the Encoded Common FEC OTI and the Encoded Scheme-Specific FEC OTI.
The FEC parameters consist of:

Source data length

The length of the source data, in number of bytes. Since encoded data may contain extra padding bytes, this value allows a decoder to infer the real size of the decoded data.

Symbol size

The size of a symbol, in number of bytes. This value represents the size of an encoding symbol (source or repair), except the size of the last source symbol, which may be smaller.

Number of source blocks

The number of source blocks into which the source data is partitioned. Each source block is encoded/decoded independently, and not every one is divided into the same number of source symbols.

Interleaver length

The number of sub-blocks per source block into which the source data is interleaved. This value influences the level of uniform interleaving used before encoding a source block. A value of 1 means no interleaving is used, and a higher value means more interleaving per source block. Interleaving refers to a burst-error correction technique in FEC codes.

Symbol alignment

This value has no relevance to the user of OpenRQ, since it is fixed to a value of 1. This parameter exists here only for compliance to the RFC 6330.

Methods are provided to write instances of this class to arrays of bytes, {@link ByteBuffer} objects, serializableobjects, {@link DataOutput} objects and {@link WritableByteChannel} objects. Additionally, static methods areprovided to parse/read instances of this class from arrays of bytes, {@code ByteBuffer} objects, serializableobjects, {@link DataInput} objects and {@link ReadableByteChannel} objects.


        @Test
        public void testNoExceptions() {


            final byte[] data = TestingCommon.Minimal.data();
            final FECParameters fecParams = TestingCommon.Minimal.fecParameters();


            OpenRQ.newEncoder(data, fecParams);
        }

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        @Test(expected = NullPointerException.class)
        public void test_NPE_data() {


            final byte[] data = null;
            final FECParameters fecParams = TestingCommon.Minimal.fecParameters();


            OpenRQ.newEncoder(data, fecParams);
        }

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        @Test(expected = NullPointerException.class)
        public void test_NPE_params() {


            final byte[] data = TestingCommon.Minimal.data();
            final FECParameters fecParams = null;


            OpenRQ.newEncoder(data, fecParams);
        }

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        @Test(expected = IllegalArgumentException.class)
        public void test_IAE() {


            final byte[] data = TestingCommon.Minimal.data();
            final FECParameters fecParams = PARAMS_WITH_DATA_LENGTH_OF_INTMAXPLUS1;


            OpenRQ.newEncoder(data, fecParams);
        }

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        @Test(expected = IndexOutOfBoundsException.class)
        public void test_IOOBE() {


            final byte[] data = new byte[1];
            final FECParameters fecParams = PARAMS_WITH_DATA_LENGTH_OF_2;


            OpenRQ.newEncoder(data, fecParams);
        }

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        @Test
        public void testNoExceptions() {


            final byte[] data = TestingCommon.Minimal.data();
            final int offset = 0;
            final FECParameters fecParams = TestingCommon.Minimal.fecParameters();


            OpenRQ.newEncoder(data, offset, fecParams);
        }

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        @Test(expected = NullPointerException.class)
        public void test_NPE_data() {


            final byte[] data = null;
            final int offset = 0;
            final FECParameters fecParams = TestingCommon.Minimal.fecParameters();


            OpenRQ.newEncoder(data, offset, fecParams);
        }

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        @Test(expected = NullPointerException.class)
        public void test_NPE_params() {


            final byte[] data = TestingCommon.Minimal.data();
            final int offset = 0;
            final FECParameters fecParams = null;


            OpenRQ.newEncoder(data, offset, fecParams);
        }

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        @Test(expected = IllegalArgumentException.class)
        public void test_IAE() {


            final byte[] data = TestingCommon.Minimal.data();
            final int offset = 0;
            final FECParameters fecParams = PARAMS_WITH_DATA_LENGTH_OF_INTMAXPLUS1;


            OpenRQ.newEncoder(data, offset, fecParams);
        }

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        @Test(expected = IndexOutOfBoundsException.class)
        public void test_IOOBE_negOffset() {


            final byte[] data = TestingCommon.Minimal.data();
            final int offset = -1;
            final FECParameters fecParams = TestingCommon.Minimal.fecParameters();


            OpenRQ.newEncoder(data, offset, fecParams);
        }

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Related Classes of net.fec.openrq.parameters.FECParameters

net.fec.openrq.OpenRQClassTest$NewDecoder

net.fec.openrq.OpenRQClassTest$NewEncoder

net.fec.openrq.OpenRQClassTest$NewEncoderOffset

net.fec.openrq.SourceBlockDecodingTest

net.fec.openrq.SourceBlockEncodingTest

java.nio.ByteBuffer

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