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/* -*- c++ -*- */
/*
* Copyright 2014 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifndef INCLUDED_DTV_ATSC_INTERLEAVER_FIFO_H
#define INCLUDED_DTV_ATSC_INTERLEAVER_FIFO_H
#include <algorithm>
#include <vector>
namespace gr {
namespace dtv {
template <class symbol_type>
class interleaver_fifo
{
public:
interleaver_fifo(unsigned int size);
//! reset interleaver (flushes contents and resets commutator)
void reset();
//! stuff a symbol into the fifo and return the oldest
symbol_type stuff(symbol_type input)
{
if (m_fifo.empty())
return input;
symbol_type retval = m_fifo[m_position];
m_fifo[m_position] = input;
m_position++;
if (m_position >= m_fifo.size())
m_position = 0;
return retval;
}
protected:
unsigned int m_position = 0;
std::vector<symbol_type> m_fifo;
};
template <class symbol_type>
interleaver_fifo<symbol_type>::interleaver_fifo(unsigned int size) : m_fifo(size)
{
}
template <class symbol_type>
void interleaver_fifo<symbol_type>::reset()
{
m_position = 0;
std::fill(std::begin(m_fifo), std::end(m_fifo), 0);
}
} /* namespace dtv */
} /* namespace gr */
#endif /* INCLUDED_DTV_ATSC_INTERLEAVER_FIFO_H */
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