summaryrefslogtreecommitdiff
path: root/gr-pager/lib/flex_parse_impl.h
blob: a4fcf03d42016c5e8b7d4362eb10ee35e18f59b8 (plain)
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
60
61
62
63
64
65
66
67
68
69
70
/* -*- c++ -*- */
/*
 * Copyright 2006,2012 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 3, 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., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */

#ifndef INCLUDED_PAGER_FLEX_PARSE_IMPL_H
#define INCLUDED_PAGER_FLEX_PARSE_IMPL_H

#include <pager/flex_parse.h>
#include <gr_sync_block.h>
#include <gr_msg_queue.h>
#include "flex_modes.h"
#include <sstream>

namespace gr {
  namespace pager {

#define FIELD_DELIM ((unsigned char)128)

    class flex_parse_impl : public flex_parse
    {
    private:
      std::ostringstream d_payload;
      gr_msg_queue_sptr d_queue;		  // Destination for decoded pages

      int d_count;	                  // Count of received codewords
      int d_datawords[88];                // 11 blocks of 8 32-bit words

      page_type_t d_type;	  	  // Current page type
      int d_capcode;	                  // Current page destination address
      bool d_laddr;	                  // Current page has long address
      float d_freq;			  // Channel frequency

      void parse_data();	    	  // Handle a frame's worth of data
      void parse_capcode(int32_t aw1, int32_t aw2);
      void parse_alphanumeric(int mw1, int mw2, int j);
      void parse_numeric(int mw1, int mw2, int j);
      void parse_tone_only();
      void parse_unknown(int mw1, int mw2);

    public:
      flex_parse_impl(gr_msg_queue_sptr queue, float freq);
      ~flex_parse_impl();

      int work(int noutput_items,
	       gr_vector_const_void_star &input_items,
	       gr_vector_void_star &output_items);
    };

  } /* namespace pager */
} /* namespace gr */

#endif /* INCLUDED_PAGER_FLEX_PARSE_IMPL_H */