GNU Radio's SATELLITES Package
varlen_packet_tagger_impl.h
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1 /* -*- c++ -*- */
2 /*
3  * Copyright 2017 Glenn Richardson <glenn@spacequest.com>
4  *
5  * This file is part of gr-satellites
6  *
7  * SPDX-License-Identifier: GPL-3.0-or-later
8  *
9  */
10 
11 #ifndef INCLUDED_VARLEN_PACKET_TAGGER_IMPL_H
12 #define INCLUDED_VARLEN_PACKET_TAGGER_IMPL_H
13 
14 #include <pmt/pmt.h>
16 
17 
18 namespace gr {
19 namespace satellites {
21 {
22 private:
23  int d_header_length; // bit size of packet length field
24  int d_mtu; // maximum packet size in bits
25  bool d_use_golay; // decode golay packet length
26  endianness_t d_endianness; // header endianness
27 
28  pmt::pmt_t d_sync_tag; // marker tag on input for start of packet
29  pmt::pmt_t d_packet_tag; // packet_len tag for output stream
30 
31  bool d_have_sync; // interal state
32  int d_ninput_items_required; // forecast
33 
34  int bits2len(const unsigned char* in);
35 
36 public:
37  varlen_packet_tagger_impl(const std::string& sync_key,
38  const std::string& packet_key,
39  int length_field_size,
40  int max_packet_size,
41  endianness_t endianness,
42  bool use_golay);
44 
45  void forecast(int noutput_items, gr_vector_int& ninput_itens_required);
46 
47  int general_work(int noutput_items,
48  gr_vector_int& ninput_items,
49  gr_vector_const_void_star& input_items,
50  gr_vector_void_star& output_items);
51 };
52 
53 } // namespace satellites
54 } // namespace gr
55 
56 #endif
Definition: varlen_packet_tagger_impl.h:20
void forecast(int noutput_items, gr_vector_int &ninput_itens_required)
Definition: ax100_decode.h:17
int general_work(int noutput_items, gr_vector_int &ninput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
Examine input stream for sync tags and extract packet length.
Definition: varlen_packet_tagger.h:35
varlen_packet_tagger_impl(const std::string &sync_key, const std::string &packet_key, int length_field_size, int max_packet_size, endianness_t endianness, bool use_golay)