GNU Radio 3.6.5.1 C++ API
gr_fractional_interpolator_ff.h
Go to the documentation of this file.
1 /* -*- c++ -*- */
2 /*
3  * Copyright 2004,2007 Free Software Foundation, Inc.
4  *
5  * This file is part of GNU Radio
6  *
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)
10  * any later version.
11  *
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.
16  *
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.
21  */
22 
23 #ifndef INCLUDED_GR_FRACTIONAL_INTERPOLATOR_FF_H
24 #define INCLUDED_GR_FRACTIONAL_INTERPOLATOR_FF_H
25 
26 #include <gr_core_api.h>
27 #include <gr_block.h>
28 
30 
33 
34 // public constructor
36 
37 /*!
38  * \brief Interpolating mmse filter with float input, float output
39  */
41 {
42 public:
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);
49 
50  float mu() const { return d_mu;}
51  float interp_ratio() const { return d_mu_inc;}
52  void set_mu (float mu) { d_mu = mu; }
53  void set_interp_ratio (float interp_ratio) { d_mu_inc = interp_ratio; }
54 
55 protected:
56  gr_fractional_interpolator_ff (float phase_shift, float interp_ratio);
57 
58 private:
59  float d_mu;
60  float d_mu_inc;
61  gri_mmse_fir_interpolator *d_interp;
62 
64  gr_make_fractional_interpolator_ff (float phase_shift, float interp_ratio);
65 };
66 
67 #endif