Method calc_state_trans

src/Module/Encoder/RSC_DB/Encoder_RSC_DB.cpp:160–194

template<typename B>
int
Encoder_RSC_DB<B>::calc_state_trans(const int in_state, const int in, int& par)
{
    // clang-format off
    std::vector<int> FF(n_ff, 0);

    for (auto i = 0; i < n_ff; i++)
        FF[0] ^= (((in_state >> i) & 1) * poly[4][n_ff - 1 - i]);
    FF[0] ^= poly[0][0] * ((in >> 1) & 1);
    FF[0] ^= poly[1][0] * ((in) & 1);

    for (auto i = 1; i < n_ff; i++)
    {
        FF[i] = (in_state >> (n_ff - i)) & 1;
        FF[i] ^= poly[0][i] * ((in >> 1) & 1);
        FF[i] ^= poly[1][i] * ((in) & 1);
    }

    int parY = FF[0] * poly[2][0];
    for (auto i = 1; i < n_ff + 1; i++)
        parY ^= ((in_state >> (n_ff - i)) & 1) * poly[2][i];

    int parW = FF[0] * poly[3][0];
    for (auto i = 1; i < n_ff + 1; i++)
        parW ^= ((in_state >> (n_ff - i)) & 1) * poly[3][i];

    par = (parY << 1) | parW;

    int next_state = 0;
    for (auto i = 0; i < n_ff; i++)
        next_state = (next_state << 1) | FF[i];

    return next_state;
    // clang-format on
}

template<typename B>
void