3 * Copyright 2004 Free Software Foundation, Inc.
5 * This file is part of GNU Radio
7 * GNU Radio is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3, or (at your option)
12 * GNU Radio is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Radio; see the file COPYING. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street,
20 * Boston, MA 02110-1301, USA.
23 #ifndef INCLUDED_GR_FRACTIONAL_INTERPOLATOR_H
24 #define INCLUDED_GR_FRACTIONAL_INTERPOLATOR_H
28 class gri_mmse_fir_interpolator;
30 class gr_fractional_interpolator;
31 typedef boost::shared_ptr<gr_fractional_interpolator> gr_fractional_interpolator_sptr;
34 gr_fractional_interpolator_sptr gr_make_fractional_interpolator (float phase_shift, float interp_ratio);
37 * \brief Interpolating mmse filter with float input, float output
40 class gr_fractional_interpolator : public gr_block
43 ~gr_fractional_interpolator ();
44 void forecast(int noutput_items, gr_vector_int &ninput_items_required);
45 int general_work (int noutput_items,
46 gr_vector_int &ninput_items,
47 gr_vector_const_void_star &input_items,
48 gr_vector_void_star &output_items);
51 gr_fractional_interpolator (float phase_shift, float interp_ratio);
56 gri_mmse_fir_interpolator *d_interp;
58 friend gr_fractional_interpolator_sptr
59 gr_make_fractional_interpolator (float phase_shift, float interp_ratio);