/// <summary>
/// Encode a BufferChunk array using RS algorithm
/// and place the checksum(s) in a BufferChunk array
/// </summary>
/// <param name="data">Array of BufferChunk that represents the data to encode</param>
/// <param name="checksum">Array of BufferChunk to store the generated checksum packets</param>
public void Encode(BufferChunk[] data, BufferChunk[] checksum)
{
// Encode by multiplying the data BufferChunk array
// with the encoding Vandermonde matrix. The operations are done over
// GF16 (Galois Field 16 bits)
FEC_BufferChunk.EncodeRS(data, checksum, enc);
}
// write the data into the provided RtpPacket's BufferChunks in the recovery[]
/// <summary>
/// Decode and insert in place the recovered packet(s) lost in the data BufferChunk array
/// </summary>
/// <param name="data">Array of BufferChunk that represents the data received including
/// checksum (with a null entrie for each packet lost)</param>
/// <param name="checksum">Number of checksum used to encode</param>
/// <param name="recovery">Array of BufferChunk to store the recovered data packets</param>
public void Decode(BufferChunk[] data, int checksum, BufferChunk[] recovery)
{
// TODO: We should first validate that #null entries in data BufferChunk
// array is equal to recovery.Length and is also equal to checksum
// Generate a decoding matrix from the BufferChunk array of packet received
GF16[,] mtxDecode = FEC_BufferChunk.DecodingMatrixGeneration(data, checksum);
// Invert the decoding matrix
// TODO: To optimize we could generate the invert matrix only with the
// row needed for decoding missing packets instead of the full inverted matrix
GF16[,] mtxDecodeInverted = FEC_Matrix.Invert(mtxDecode);
// Decode by multiplying the received data BufferChunk array
// with the inverted decoding matrix. The operations are done over
// GF16 (Galois Field 16 bits)
FEC_BufferChunk.DecodeRS(checksum, data, mtxDecodeInverted, recovery);
}
