GNU Radio's DAB Package
crc16_bb_impl.h
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1/* -*- c++ -*- */
2/*
3 * Copyright 2017 by Moritz Luca Schmid, Communications Engineering Lab (CEL) / Karlsruhe Institute of Technology (KIT).
4 *
5 * This is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 3, or (at your option)
8 * any later version.
9 *
10 * This software is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this software; see the file COPYING. If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street,
18 * Boston, MA 02110-1301, USA.
19 */
20
21#ifndef INCLUDED_DAB_CRC16_BB_IMPL_H
22#define INCLUDED_DAB_CRC16_BB_IMPL_H
23
24#include <dab/crc16_bb.h>
25
26namespace gr {
27 namespace dab {
28/*! \brief crc16 is written in the last 2 bits of input vector
29 *
30 * input: char vector of length length (packed bytes)
31 *
32 * output: char vector of length length (packed bytes) with crc at last 2 bytes (overwrites last 2 bytes)
33 *
34 * uses the crc16 function to calculate a 2 byte crc word and write it to the FIB (overwrites last 2 bytes)
35 *
36 * @param length Length of input and output vector in bytes. (default is 32 for DAB FIBs)
37 * @param generator Generator polynom for shift register. (default is 0x1021 for DAB)
38 * @param initial_state Initial state of shift register. (default is 0xffff for DAB)
39 */
40 class crc16_bb_impl : public crc16_bb {
41 private:
42 uint16_t d_crc;
43 int d_length, d_generator, d_initial_state;
44
45 public:
46 crc16_bb_impl(int length, uint16_t generator, uint16_t initial_state);
47
49
50 void forecast(int noutput_items, gr_vector_int &ninput_items_required);
51
52 int general_work(int noutput_items,
53 gr_vector_int &ninput_items,
54 gr_vector_const_void_star &input_items,
55 gr_vector_void_star &output_items);
56 };
57
58 }
59}
60
61#endif /* INCLUDED_DAB_CRC16_BB_IMPL_H */
crc16 is written in the last 2 bits of input vector
Definition crc16_bb_impl.h:40
int general_work(int noutput_items, gr_vector_int &ninput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
void forecast(int noutput_items, gr_vector_int &ninput_items_required)
crc16_bb_impl(int length, uint16_t generator, uint16_t initial_state)
crc16 is written in the last 2 bits of input vector
Definition crc16_bb.h:44
Definition complex_to_interleaved_float_vcf.h:28