CharMatrixXfEncoder.cpp

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#include <encoders/CharMatrixXfEncoder.hpp>

#include <logger/Log.hpp>

#include <cstring> // for memset 
#ifdef _WIN32
#include <string.h>
#endif

namespace mic {
namespace encoders {

mic::types::MatrixXfPtr CharMatrixXfEncoder::encodeSample(const std::shared_ptr<char>& sample_) {
    // Create returned SDR - a vector, i.e. a matrix with number of columns equal to 1.
    mic::types::MatrixXfPtr sdr (new mic::types::MatrixXf(sdr_length,1));
    // Set all zeros.
    sdr->setZero();

    // Convert ASCII char to int.
    char sample = *sample_;
    int a = sample - 32;
    //std::cout <<" input_ = " << input_ <<" a = " << a;
    if (a < 0)
        LOG(LERROR) << "Could not properly encode character '" <<sample << "' ("<<a<<")!";
    else if ((size_t) a >= (size_t) sdr_length)
        LOG(LERROR) << "The SDR is too short for proper encoding of the character '" <<sample << "' ("<<a<<")!";
    else
        (*sdr)(a) = 1;
    return sdr;
}

std::shared_ptr<char> CharMatrixXfEncoder::decodeSample(const mic::types::MatrixXfPtr& sdr_) {
    // SDR must be in fact a vector, with number of columns equal to 1.
    assert(sdr_->cols() == 1);

    // Find index of max value.
    mic::types::MatrixXf::Index maxRow, maxCol;
    float max_value = sdr_->maxCoeff(&maxRow, &maxCol);
    LOG(LDEBUG) << "(maxRow, maxCol) = max_value [ (" << maxRow << "," << maxCol <<") = " << max_value << "]";

    // Convert int to ASCII.
    char decoded = maxRow + 32;

    return std::make_shared<char>(decoded);
}


} /* namespace encoders */
} /* namespace mic */