gr-baz Package

baz_acars_decoder.h
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1/* -*- c++ -*- */
2/*
3 * Copyright 2004 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/*
24 * gr-baz by Balint Seeber (http://spench.net/contact)
25 * Information, documentation & samples: http://wiki.spench.net/wiki/gr-baz
26 */
27
28#ifndef INCLUDED_BAZ_ACARS_H
29#define INCLUDED_BAZ_ACARS_H
30
31#include <gnuradio/sync_block.h>
32#include <gnuradio/msg_queue.h>
33#include <string>
34
35 class baz_acars_decoder;
36
37/*
38 * We use boost::shared_ptr's instead of raw pointers for all access
39 * to gr::blocks (and many other data structures). The shared_ptr gets
40 * us transparent reference counting, which greatly simplifies storage
41 * management issues. This is especially helpful in our hybrid
42 * C++ / Python system.
43 *
44 * See http://www.boost.org/libs/smart_ptr/smart_ptr.htm
45 *
46 * As a convention, the _sptr suffix indicates a boost::shared_ptr
47 */
48 typedef boost::shared_ptr<baz_acars_decoder> baz_acars_decoder_sptr;
49
50/*!
51 * \brief Return a shared_ptr to a new instance of baz_acars_decoder.
52 *
53 * To avoid accidental use of raw pointers, baz_acars_decoder's
54 * constructor is private. baz_acars_decoder is the public
55 * interface for creating new instances.
56 */
57baz_acars_decoder_sptr baz_make_acars_decoder (gr::msg_queue::sptr msgq);
58
59/*!
60 * \brief acars a stream of floats.
61 * \ingroup block
62 *
63 * This uses the preferred technique: subclassing gr::sync_block.
64 */
65 class baz_acars_decoder : public gr::sync_block
66{
67 private:
68 // The friend declaration allows baz_acars_decoder to
69 // access the private constructor.
70 friend baz_acars_decoder_sptr baz_make_acars_decoder (gr::msg_queue::sptr msgq);
71
72 baz_acars_decoder (gr::msg_queue::sptr msgq); // private constructor
73
74 enum state_t
75 {
76 STATE_SEARCHING,
77 //STATE_BITSYNC,
78 //STATE_CHARSYNC,
79 STATE_ASSEMBLE,
80 //STATE_DLE,
81 //STATE_END
82 };
83
84 const static int MAX_ACARS_PACKET_SIZE = 252;
85
86 enum flags_t
87 {
88 FLAG_NONE = 0x00,
89 FLAG_SOH = 0x01,
90 FLAG_STX = 0x02,
91 FLAG_ETX = 0x04,
92 FLAG_DEL = 0x08
93 };
94
95#pragma pack(push)
96#pragma pack(1)
97 struct packet
98 {
99 float reference_level;
100 float prekey_average;
101 int prekey_ones;
102 unsigned char byte_data[MAX_ACARS_PACKET_SIZE];
103 unsigned char byte_error[MAX_ACARS_PACKET_SIZE];
104 int parity_error_count;
105 int byte_count;
106 unsigned char flags;
107 int etx_index;
108 };
109#pragma pack(pop)
110
111 state_t d_state;
112 unsigned long d_preamble_state;
113 int d_preamble_threshold;
114 struct packet d_current_packet;
115 int d_bit_counter;
116 unsigned char d_current_byte;
117 int d_byte_counter;
118 unsigned char d_flags;
119 gr::msg_queue::sptr d_msgq;
120 unsigned char d_prev_bit;
121 float d_frequency;
122 std::string d_station_name;
123
124 public:
125 ~baz_acars_decoder (); // public destructor
126
127 void set_preamble_threshold(int threshold);
128 void set_frequency(float frequency);
129 void set_station_name(const char* station_name);
130
131 inline int preamble_threshold() const
132 { return d_preamble_threshold; }
133 inline float frequency() const
134 { return d_frequency; }
135 inline const char* station_name() const
136 { return d_station_name.c_str(); }
137
138 int work (int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items);
139};
140
141#endif /* INCLUDED_BAZ_ACARS_CC_H */
baz_make_acars_decoder
baz_acars_decoder_sptr baz_make_acars_decoder(gr::msg_queue::sptr msgq)
Return a shared_ptr to a new instance of baz_acars_decoder.
baz_acars_decoder
acars a stream of floats.
Definition: baz_acars_decoder.h:66
baz_acars_decoder::baz_make_acars_decoder
friend baz_acars_decoder_sptr baz_make_acars_decoder(gr::msg_queue::sptr msgq)
Return a shared_ptr to a new instance of baz_acars_decoder.
baz_acars_decoder::preamble_threshold
int preamble_threshold() const
Definition: baz_acars_decoder.h:131
baz_acars_decoder::~baz_acars_decoder
~baz_acars_decoder()
baz_acars_decoder::set_frequency
void set_frequency(float frequency)
baz_acars_decoder::set_preamble_threshold
void set_preamble_threshold(int threshold)
baz_acars_decoder::station_name
const char * station_name() const
Definition: baz_acars_decoder.h:135
baz_acars_decoder::set_station_name
void set_station_name(const char *station_name)
baz_acars_decoder::frequency
float frequency() const
Definition: baz_acars_decoder.h:133
baz_acars_decoder::work
int work(int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)