GNU Radio 3.6.3 C++ API
gr_encode_ccsds_27_bb.h
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1 /* -*- c++ -*- */
2 /*
3  * Copyright 2008 Free Software Foundation, Inc.
4  *
5  * GNU Radio is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 3, or (at your option)
8  * any later version.
9  *
10  * GNU Radio is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with GNU Radio; see the file COPYING. If not, write to
17  * the Free Software Foundation, Inc., 51 Franklin Street,
18  * Boston, MA 02110-1301, USA.
19  */
20 #ifndef INCLUDED_GR_ENCODE_CCSDS_27_BB_H
21 #define INCLUDED_GR_ENCODE_CCSDS_27_BB_H
22 
23 #include <gr_core_api.h>
24 #include <gr_sync_interpolator.h>
25 
27 
29 
31 
32 /*! \brief A rate 1/2, k=7 convolutional encoder for the CCSDS standard
33  * \ingroup ecc
34  *
35  * This block performs convolutional encoding using the CCSDS standard
36  * polynomial ("Voyager").
37  *
38  * The input is an MSB first packed stream of bits.
39  *
40  * The output is a stream of symbols 0 or 1 representing the encoded data.
41  *
42  * As a rate 1/2 code, there will be 16 output symbols for every input byte.
43  *
44  * This block is designed for continuous data streaming, not packetized data.
45  * There is no provision to "flush" the encoder.
46  */
47 
49 {
50 private:
52 
54  unsigned char d_encstate;
55 
56  public:
58 
59  int work (int noutput_items,
60  gr_vector_const_void_star &input_items,
61  gr_vector_void_star &output_items);
62 };
63 
64 #endif /* INCLUDED_GR_ENCODE_CCSDS_27_BB_H */