Method _encode

src/Module/Encoder/Conv/Encoder_conv.cpp:125–159

template<typename B>
void
Encoder_conv<B>::_encode(const B* U_K, B* X_N, const size_t /*frame_id*/)
{
    int state = 0;

    // Encode K information bits
    for (int i = 0; i < this->K; i++)
    {
        int b = static_cast<int>(U_K[i]);
        int packed = output_table[2 * state + b];
        state = next_state_table[2 * state + b];

        // Unpack n_poly output bits into interleaved positions
        for (int p = 0; p < n_poly; p++)
            X_N[i * n_poly + p] = static_cast<B>((packed >> (n_poly - 1 - p)) & 1);
    }

    // Tail bits: drive state back to 0 by feeding 0
    for (int i = 0; i < n_ff; i++)
    {
        int b = 0;
        int packed = output_table[2 * state + b];
        state = next_state_table[2 * state + b];

        for (int p = 0; p < n_poly; p++)
            X_N[(this->K + i) * n_poly + p] = static_cast<B>((packed >> (n_poly - 1 - p)) & 1);
    }

    if (state != 0)
    {
        std::stringstream message;
        message << "'state' should be equal to 0 after tail bits ('state' = " << state << ").";
        throw spu::tools::runtime_error(__FILE__, __LINE__, __func__, message.str());
    }
}

template<typename B>
std::vector<std::vector<int>>