- if (m_idFilterMethod == FILTER_METHOD_FOURIER) {
- int nFourier = m_nSignalPoints * m_nSignalPoints + 1;
- double angleIncrement = (2. * PI) / m_nSignalPoints;
- m_vecFourierCosTable = new double[ nFourier ];
- m_vecFourierSinTable = new double[ nFourier ];
- for (int i = 0; i < nFourier; i++) {
- m_vecFourierCosTable[i] = cos (angleIncrement * i);
- m_vecFourierSinTable[i] = sin (angleIncrement * i);
- }
- m_nFilterPoints = m_nSignalPoints;
- m_filterMin = 0;
- m_filterMax = m_nSignalPoints * m_signalInc;
- m_filterInc = (m_filterMax - m_filterMin) / (m_nFilterPoints - 1);
- m_vecFilter = new double [m_nFilterPoints];
- int halfFilter = m_nFilterPoints / 2;
- for (int i = 0; i < halfFilter; i++)
- m_vecFilter[i] = static_cast<double>(i) / (halfFilter - 1) / (2 * m_signalInc);
- for (int i = 0; i < halfFilter; i++)
- m_vecFilter[m_nFilterPoints - i - 1] = static_cast<double>(i) / (halfFilter - 1) / (2 * m_signalInc);
- if (halfFilter % 2) // odd
- m_vecFilter[halfFilter] = 1;
- } else if (m_idFilterMethod == FILTER_METHOD_FFT || m_idFilterMethod == FILTER_METHOD_FFT_ZEROPAD_2 || m_idFilterMethod == FILTER_METHOD_FFT_ZEROPAD_4) {
- m_nFilterPoints = m_nSignalPoints;
- if (m_idFilterMethod == FILTER_METHOD_FFT_ZEROPAD_2 || m_idFilterMethod == FILTER_METHOD_FFT_ZEROPAD_4) {
- double logBase2 = log(m_nSignalPoints) / log(2);
- int nextPowerOf2 = static_cast<int>(floor(logBase2)) + 1;
- if (m_idFilterMethod == FILTER_METHOD_FFT_ZEROPAD_4)
- nextPowerOf2++;
- if (logBase2 != floor(logBase2))
- nextPowerOf2++;
- m_nFilterPoints = 1 << nextPowerOf2;
- cout << "nFilterPoints = " << m_nFilterPoints << endl;
- }
- m_filterMin = 0;
- m_filterMax = m_nSignalPoints * m_signalInc;
- m_filterInc = (m_filterMax - m_filterMin) / (m_nFilterPoints - 1);
- m_vecFilter = new double [m_nFilterPoints];
- int halfFilter = m_nFilterPoints / 2;
- for (int i = 0; i < halfFilter; i++)
- m_vecFilter[i] = static_cast<double>(i) / (halfFilter - 1) / (2 * m_signalInc);
- for (int i = 0; i < halfFilter; i++)
- m_vecFilter[m_nFilterPoints - i - 1] = static_cast<double>(i) / (halfFilter - 1) / (2 * m_signalInc);
- if (halfFilter % 2) // odd
- m_vecFilter[halfFilter] = 1;
-
-#if HAVE_FFTW
- m_planForward = fftw_create_plan (m_nFilterPoints, FFTW_FORWARD, FFTW_ESTIMATE);
- m_planBackward = fftw_create_plan (m_nFilterPoints, FFTW_BACKWARD, FFTW_ESTIMATE);
-#endif
- }
-
- if (m_idFilterMethod == FILTER_METHOD_CONVOLUTION) {
- m_nFilterPoints = 2 * m_nSignalPoints - 1;
- m_filterMin = -m_signalInc * (m_nSignalPoints - 1);
- m_filterMax = m_signalInc * (m_nSignalPoints - 1);
- m_filterInc = (m_filterMax - m_filterMin) / (m_nFilterPoints - 1);
- m_numIntegral = numint;
- m_vecFilter = new double[ m_nFilterPoints ];
-
- if (m_idFilter == FILTER_SHEPP) {
- double a = 2 * m_bw;
- double c = - 4. / (a * a);
- int center = (m_nFilterPoints - 1) / 2;
- int sidelen = center;
- m_vecFilter[center] = 4. / (a * a);
-
- for (int i = 1; i <= sidelen; i++ )
- m_vecFilter [center + i] = m_vecFilter [center - i] = c / (4 * (i * i) - 1);
- } else if (m_idDomain == DOMAIN_FREQUENCY) {
- double x;
- int i;
- for (x = m_filterMin, i = 0; i < m_nFilterPoints; x += m_filterInc, i++)
- m_vecFilter[i] = frequencyResponse (x, param);
- } else if (m_idDomain == DOMAIN_SPATIAL) {
- double x;
- int i;
- for (x = m_filterMin, i = 0; i < m_nFilterPoints; x += m_filterInc, i++)
- if (numint == 0)
- m_vecFilter[i] = spatialResponseAnalytic (x, param);
- else
- m_vecFilter[i] = spatialResponseCalc (x, param, numint);
- } else {
- m_failMessage = "Illegal domain name ";
- m_failMessage += m_idDomain;
- m_fail = true;
- }
- }