Method MfccCompute

samples/common/src/Audio/MFCC.cpp:263–283

}

std::vector<float> MFCC::MfccCompute(const std::vector<float>& audioData)
{
    this->MfccComputePreFeature(audioData);

    std::vector<float> mfccOut(this->m_params.m_numMfccFeatures);

    float * ptrMel = this->m_melEnergies.data();
    float * ptrDct = this->m_dctMatrix.data();
    float * ptrMfcc = mfccOut.data();

    /* Take DCT. Uses matrix mul. */
    for (size_t i = 0, j = 0; i < mfccOut.size();
                ++i, j += this->m_params.m_numFbankBins) 
    {
        *ptrMfcc++ = MathUtils::DotProductF32(
                ptrDct + j,
                ptrMel,
                this->m_params.m_numFbankBins);
    }
    return mfccOut;
}

std::vector<std::vector<float>> MFCC::CreateMelFilterBank()
{