1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
/* -*- c++ -*- */
/*
* Copyright 2006 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* GNU Radio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef INCLUDED_DECODER_H
#define INCLUDED_DECODER_H
#include "code_types.h"
// the 'decoder' class is a virtual class upon which all decoder types
// can be built.
class decoder
{
public:
decoder () {};
virtual ~decoder () {};
virtual size_t compute_n_input_metrics (size_t n_output_bits) = 0;
virtual size_t compute_n_output_bits (size_t n_input_metrics) = 0;
virtual size_t decode (const char** in_buf,
char** out_buf,
size_t n_bits_to_output);
virtual size_t decode (const char** in_buf,
size_t n_metrics_to_input,
char** out_buf);
protected:
virtual void decode_private (const char** in_buf, char** out_buf) = 0;
virtual char get_next_input (const char** in_buf, size_t code_input_n) = 0;
virtual void output_bit (char t_out_bit, char** out_buf,
size_t t_output_stream) = 0;
size_t d_block_size_bits, d_n_code_inputs, d_n_code_outputs;
size_t d_n_dec_bits;
size_t d_in_buf_ndx, d_out_buf_ndx;
size_t d_in_bit_shift, d_out_bit_shift;
size_t d_n_input_metrics_left, d_n_output_bits_left;
};
#endif /* INCLUDED_DECODER_H */
|
