/usr/include/gnuradio/fec/repetition_decoder.h is in gnuradio-dev 3.7.9.1-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/*
* Copyright 2014 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_FEC_REPETITION_DECODER_H
#define INCLUDED_FEC_REPETITION_DECODER_H
#include <gnuradio/fec/api.h>
#include <gnuradio/fec/generic_decoder.h>
#include <map>
#include <string>
namespace gr {
namespace fec {
namespace code {
/*!
* \brief Repetition Decoding class.
* \ingroup error_coding_blk
*
* \details
* A repetition decoder class. This takes a majority vote,
* biased by the \p ap_prob rate, and decides if the number of 1
* bits > ap_prob, it is a 1; else, it is a 0.
*/
class FEC_API repetition_decoder : virtual public generic_decoder
{
public:
/*!
* Build a repetition decoding FEC API object.
*
* \param frame_size Number of bits per frame. If using in the
* tagged stream style, this is the maximum allowable
* number of bits per frame.
* \param rep Repetition rate; encoder rate is rep bits out
* for each input bit.
* \param ap_prob The a priori probability that a bit is a 1
* (generally, unless otherwise known, assume to be
* 0.5).
*/
static generic_decoder::sptr make(int frame_size, int rep,
float ap_prob=0.5);
/*!
* Sets the uncoded frame size to \p frame_size. If \p
* frame_size is greater than the value given to the
* constructor, the frame size will be capped by that initial
* value and this function will return false. Otherwise, it
* returns true.
*/
virtual bool set_frame_size(unsigned int frame_size) = 0;
/*!
* Returns the coding rate of this encoder (it will always be 1).
*/
virtual double rate() = 0;
};
} /* namespace code */
} /* namespace fec */
} /* namespace gr */
#endif /* INCLUDED_FEC_REPETITION_DECODER_H */
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