GNU Radio 3.6.3 C++ API
gr_fft_filter_fff.h
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1 /* -*- c++ -*- */
2 /*
3  * Copyright 2005 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 #ifndef INCLUDED_GR_FFT_FILTER_FFF_H
23 #define INCLUDED_GR_FFT_FILTER_FFF_H
24 
25 #include <gr_core_api.h>
26 #include <gr_sync_decimator.h>
27 
28 class gr_fft_filter_fff;
31 gr_make_fft_filter_fff (int decimation, const std::vector<float> &taps,
32  int nthreads=1);
33 
35 //class gri_fft_filter_fff_sse;
36 
37 /*!
38  * \brief Fast FFT filter with float input, float output and float taps
39  * \ingroup filter_blk
40  */
42 {
43  private:
45  gr_make_fft_filter_fff (int decimation, const std::vector<float> &taps,
46  int nthreads);
47 
48  int d_nsamples;
49  bool d_updated;
50 #if 1 // don't enable the sse version until handling it is worked out
52 #else
53  gri_fft_filter_fff_sse *d_filter;
54 #endif
55  std::vector<float> d_new_taps;
56 
57  /*!
58  * Construct a FFT filter with the given taps
59  *
60  * \param decimation >= 1
61  * \param taps float filter taps
62  * \param nthreads number of threads for the FFT to use
63  */
64  gr_fft_filter_fff (int decimation, const std::vector<float> &taps,
65  int nthreads=1);
66 
67  public:
69 
70  void set_taps (const std::vector<float> &taps);
71  std::vector<float> taps () const;
72 
73  /*!
74  * \brief Set number of threads to use.
75  */
76  void set_nthreads(int n);
77 
78  /*!
79  * \brief Get number of threads being used.
80  */
81  int nthreads() const;
82 
83  int work (int noutput_items,
84  gr_vector_const_void_star &input_items,
85  gr_vector_void_star &output_items);
86 };
87 
88 #endif /* INCLUDED_GR_FFT_FILTER_FFF_H */