GNU Radio 3.5.3.2 C++ API
gr_squash_ff.h
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1 /* -*- c++ -*- */
2 /*
3  * Copyright 2008 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_SQUASH_FF_H_
24 # define INCLUDED_GR_SQUASH_FF_H_
25 
26 #include <gr_core_api.h>
27 #include <gr_sync_block.h>
28 #include <gsl/gsl_errno.h>
29 #include <gsl/gsl_interp.h>
30 #include <gsl/gsl_spline.h>
31 /*!
32  * \brief implements cheap resampling of spectrum directly from
33  * spectral points, using gsl interpolation
34  * \ingroup misc
35  */
36 
37 class gr_squash_ff;
39 
40 GR_CORE_API gr_squash_ff_sptr gr_make_squash_ff(const std::vector<float> &igrid,
41  const std::vector<float> &ogrid);
42 
44 {
45  friend GR_CORE_API gr_squash_ff_sptr gr_make_squash_ff(const std::vector<float> &igrid,
46  const std::vector<float> &ogrid);
47 
48  size_t d_inum;
49  size_t d_onum;
50  double *d_igrid;
51  double *d_iwork;
52  double *d_ogrid;
53 
54  gsl_interp_accel *d_accel;
55  gsl_spline *d_spline;
56 
57  gr_squash_ff(const std::vector<float> &igrid,
58  const std::vector<float> &ogrid);
59 
60  public:
61  ~gr_squash_ff();
62 
63  int work(int noutput_items,
64  gr_vector_const_void_star &input_items,
65  gr_vector_void_star &output_items);
66 };
67 
68 #endif