- dotProduct (m_vecFilter, fftSignal, filteredSignal, m_nFilterPoints);
- finiteFourierTransform (filteredSignal, complexOutput, m_nFilterPoints, 1);
+ for (int i = 0; i < m_nFilterPoints; i++)
+ fftSignal[i] *= m_vecFilter[i];
+ double inverseFourier[m_nFilterPoints];
+ finiteFourierTransform (fftSignal, inverseFourier, m_nFilterPoints, 1);
+ for (int i = 0; i < m_nSignalPoints; i++)
+ output[i] = inverseFourier[i];
+ } else if (m_idFilterMethod == FILTER_METHOD_FOURIER_TABLE) {
+ double inputSignal[m_nFilterPoints];
+ for (int i = 0; i < m_nSignalPoints; i++)
+ inputSignal[i] = input[i];
+ for (int i = m_nSignalPoints; i < m_nFilterPoints; i++)
+ inputSignal[i] = 0; // zeropad
+ complex<double> fftSignal[m_nFilterPoints];
+ finiteFourierTransform (inputSignal, fftSignal, -1);
+ for (int i = 0; i < m_nFilterPoints; i++)
+ fftSignal[i] *= m_vecFilter[i];
+ double inverseFourier[m_nFilterPoints];
+ finiteFourierTransform (fftSignal, inverseFourier, 1);