GNU Radio C++ API
gr_glfsr_source_f.h
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1 /* -*- c++ -*- */
2 /*
3  * Copyright 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_GLFSR_SOURCE_F_H
24 #define INCLUDED_GR_GLFSR_SOURCE_F_H
25 
26 #include <gr_core_api.h>
27 #include <gr_sync_block.h>
28 
29 class gri_glfsr;
30 
31 class gr_glfsr_source_f;
33 
34 GR_CORE_API gr_glfsr_source_f_sptr gr_make_glfsr_source_f(int degree, bool repeat=true, int mask=0, int seed=1);
35 
36 /*!
37  * \brief Galois LFSR pseudo-random source generating float outputs -1.0 - 1.0
38  * \ingroup source_blk
39  */
41 {
42  private:
44  gr_make_glfsr_source_f(int degree, bool repeat, int mask, int seed);
45 
46  gri_glfsr *d_glfsr;
47 
48  bool d_repeat;
49  unsigned int d_index;
50  unsigned int d_length;
51 
52  gr_glfsr_source_f(int degree, bool repeat, int mask, int seed);
53 
54  public:
55 
57 
58  int work(int noutput_items,
59  gr_vector_const_void_star &input_items,
60  gr_vector_void_star &output_items);
61 
62  unsigned int period() const { return d_length; }
63  int mask() const;
64 };
65 
66 #endif /* INCLUDED_GR_GLFSR_SOURCE_F_H */