GNU Radio's DAB Package
reed_solomon_decode_bb_impl.h
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1 /* -*- c++ -*- */
2 /*
3  * Reed-Solomon decoder for DAB+
4  * Copyright 2002 Phil Karn, KA9Q
5  * May be used under the terms of the GNU General Public License (GPL)
6  *
7  * Rewritten into a GNU Radio block for gr-dab
8  * Copyright 2017 Moritz Luca Schmid, Communications Engineering Lab (CEL) / Karlsruhe Institute of Technology (KIT).
9 
10  *
11  * This is free software; you can redistribute it and/or modify
12  * it under the terms of the GNU General Public License as published by
13  * the Free Software Foundation; either version 3, or (at your option)
14  * any later version.
15  *
16  * This software is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19  * GNU General Public License for more details.
20  *
21  * You should have received a copy of the GNU General Public License
22  * along with this software; see the file COPYING. If not, write to
23  * the Free Software Foundation, Inc., 51 Franklin Street,
24  * Boston, MA 02110-1301, USA.
25  */
26 
27 #ifndef INCLUDED_DAB_REED_SOLOMON_DECODE_BB_IMPL_H
28 #define INCLUDED_DAB_REED_SOLOMON_DECODE_BB_IMPL_H
29 
31 
32 extern "C" {
33 #include <fec/fec.h>
34 }
35 
36 namespace gr {
37  namespace dab {
38 /*! \brief Reed-Solomon decoder configured for DAB+
39  *
40  * Reed Solomon RS(120, 110, t=5) with virtual interleaving; derived from RS(255, 245, t=5). Details see ETSI TS 102 563 clause 6.0 and 6.1.
41  *
42  * @param bit_rate_n data rate in multiples of 8kbit/s
43  *
44  */
46  private:
47  int d_bit_rate_n;
48  int d_superframe_size;
49  int d_superframe_size_rs;
50  void *rs_handle;
51  uint8_t rs_packet[120];
52  int corr_pos[10];
53  int d_corrected_errors;
54 
55  void DecodeSuperframe(uint8_t *sf, size_t sf_len);
56 
57  public:
58  reed_solomon_decode_bb_impl(int bit_rate_n);
59 
61 
62  virtual int get_corrected_errors()
63  { return d_corrected_errors; }
64 
65  // Where all the action really happens
66  void forecast(int noutput_items, gr_vector_int &ninput_items_required);
67 
68  int general_work(int noutput_items,
69  gr_vector_int &ninput_items,
70  gr_vector_const_void_star &input_items,
71  gr_vector_void_star &output_items);
72  };
73 
74  } // namespace dab
75 } // namespace gr
76 
77 #endif /* INCLUDED_DAB_REED_SOLOMON_DECODE_BB_IMPL_H */
78 
Reed-Solomon decoder configured for DAB+.
Definition: reed_solomon_decode_bb.h:36
int general_work(int noutput_items, gr_vector_int &ninput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
Definition: complex_to_interleaved_float_vcf.h:28
void forecast(int noutput_items, gr_vector_int &ninput_items_required)
virtual int get_corrected_errors()
Definition: reed_solomon_decode_bb_impl.h:62
Reed-Solomon decoder configured for DAB+.
Definition: reed_solomon_decode_bb_impl.h:45