Method createByInterpolatingSlices

src/internal/src/HRTFPanner.cpp:380–407

}

std::unique_ptr<HRTFElevation> HRTFElevation::createByInterpolatingSlices(HRTFDatabaseInfo * info, HRTFElevation * hrtfElevation1, HRTFElevation * hrtfElevation2, float x)
{
    ASSERT(hrtfElevation1 && hrtfElevation2);
    if (!hrtfElevation1 || !hrtfElevation2)
        return nullptr;

    ASSERT(x >= 0.0 && x < 1.0);

    std::unique_ptr<HRTFKernelList> kernelListL = std::unique_ptr<HRTFKernelList>(new HRTFKernelList(NumberOfTotalAzimuths));
    std::unique_ptr<HRTFKernelList> kernelListR = std::unique_ptr<HRTFKernelList>(new HRTFKernelList(NumberOfTotalAzimuths));

    HRTFKernelList * kernelListL1 = hrtfElevation1->kernelListL();
    HRTFKernelList * kernelListR1 = hrtfElevation1->kernelListR();
    HRTFKernelList * kernelListL2 = hrtfElevation2->kernelListL();
    HRTFKernelList * kernelListR2 = hrtfElevation2->kernelListR();

    // Interpolate kernels of corresponding azimuths of the two elevations.
    for (uint32_t i = 0; i < NumberOfTotalAzimuths; ++i)
    {
        (*kernelListL)[i] = MakeInterpolatedKernel(kernelListL1->at(i).get(), kernelListL2->at(i).get(), x);
        (*kernelListR)[i] = MakeInterpolatedKernel(kernelListR1->at(i).get(), kernelListR2->at(i).get(), x);
    }

    // Interpolate elevation angle.
    double angle = (1.0 - x) * hrtfElevation1->elevationAngle() + x * hrtfElevation2->elevationAngle();

    return std::unique_ptr<HRTFElevation>(new HRTFElevation(info, std::move(kernelListL), std::move(kernelListR), (int) angle));
}

void HRTFElevation::getKernelsFromAzimuth(double azimuthBlend, unsigned azimuthIndex, HRTFKernel *& kernelL, HRTFKernel *& kernelR, double & frameDelayL, double & frameDelayR)
{