GNU Radio 3.5.3.1 C++ API
gr_fractional_interpolator_ff.h
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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
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14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
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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  * \ingroup filter_blk
40  */
42 {
43 public:
45  void forecast(int noutput_items, gr_vector_int &ninput_items_required);
46  int general_work (int noutput_items,
47  gr_vector_int &ninput_items,
48  gr_vector_const_void_star &input_items,
49  gr_vector_void_star &output_items);
50 
51  float mu() const { return d_mu;}
52  float interp_ratio() const { return d_mu_inc;}
53  void set_mu (float mu) { d_mu = mu; }
54  void set_interp_ratio (float interp_ratio) { d_mu_inc = interp_ratio; }
55 
56 protected:
57  gr_fractional_interpolator_ff (float phase_shift, float interp_ratio);
58 
59 private:
60  float d_mu;
61  float d_mu_inc;
62  gri_mmse_fir_interpolator *d_interp;
63 
65  gr_make_fractional_interpolator_ff (float phase_shift, float interp_ratio);
66 };
67 
68 #endif