Method addConstantGroupDelay

src/internal/src/FFTFrame.cpp:205–230

}

void FFTFrame::addConstantGroupDelay(double sampleFrameDelay)
{
    int halfSize = fftSize() / 2;

    float * realP = realData();
    float * imagP = imagData();

    const double kSamplePhaseDelay = (2.0 * static_cast<double>(LAB_PI)) / double(fftSize());

    double phaseAdj = -sampleFrameDelay * kSamplePhaseDelay;

    // Add constant group delay
    for (int i = 1; i < halfSize; i++)
    {
        Complex c(realP[i], imagP[i]);
        double mag = abs(c);
        double phase = arg(c);

        phase += i * phaseAdj;

        Complex c2 = std::polar(mag, phase);

        realP[i] = static_cast<float>(c2.real());
        imagP[i] = static_cast<float>(c2.imag());
    }
}

#ifndef NDEBUG
void FFTFrame::print()