Chris@0: /*
Chris@0:   copyright (C) 2012 I. Irigaray, M. Rocamora
Chris@0: 
Chris@0:   This program is free software: you can redistribute it and/or modify
Chris@0:   it under the terms of the GNU General Public License as published by
Chris@0:   the Free Software Foundation, either version 3 of the License, or
Chris@0:   (at your option) any later version.
Chris@0: 
Chris@0:   This program is distributed in the hope that it will be useful,
Chris@0:   but WITHOUT ANY WARRANTY; without even the implied warranty of
Chris@0:   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
Chris@0:   GNU General Public License for more details.
Chris@0: 
Chris@0:   You should have received a copy of the GNU General Public License
Chris@0:   along with this program.  If not, see <http://www.gnu.org/licenses/>.
Chris@0:  */
Chris@0: 
Chris@14: #ifndef FCHTRANSFORMUTILS_H
Chris@14: #define FCHTRANSFORMUTILS_H
Chris@14: 
Chris@0: #include <string.h>
Chris@0: 
Chris@21: #include "bqvec/Restrict.h"
Chris@21: 
Chris@14: class Utils
Chris@14: {
Chris@14: public:
Chris@14:     static void interp1(const double *x1,const double *y1, int N1, const double *x2, double *y2, int N2);
Chris@0: 
Chris@21:     static void interp1q(const double *const BQ_R__ y1,
Chris@21:                          const int *const BQ_R__ x2_int,
Chris@21:                          const double *const BQ_R__ x2_frac,
Chris@21:                          double *const BQ_R__ y2,
Chris@21:                          int const n2)
Chris@21:     {
Chris@21:         for (int i = 0; i < n2; ++i) {
Chris@21:             double f = x2_frac[i];
Chris@21:             int j = x2_int[i];
Chris@21:             y2[i] = y1[j] * (1.0-f) + y1[j+1] * f;
Chris@21:         }
Chris@14:     }
Chris@0: 
Chris@14:     static void cumtrapz(const double *x, const double *y, int N, double *accum);
Chris@0: 
Chris@14:     static void hanning_window(double *p_window, int n, bool normalize);
Chris@14: };
Chris@14: 
Chris@14: #endif
Chris@14: