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atsc_deinterleaver_impl.h
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/* -*- c++ -*- */
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/*
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* Copyright 2014 Free Software Foundation, Inc.
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*
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* This file is part of GNU Radio
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*
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* GNU Radio is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* GNU Radio is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Radio; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef INCLUDED_DTV_ATSC_DEINTERLEAVER_IMPL_H
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#define INCLUDED_DTV_ATSC_DEINTERLEAVER_IMPL_H
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#include <
gnuradio/dtv/atsc_deinterleaver.h
>
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#include "
atsc_types.h
"
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#include "
interleaver_fifo.h
"
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namespace
gr {
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namespace
dtv {
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class
atsc_deinterleaver_impl
:
public
atsc_deinterleaver
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{
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private
:
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//! transform a single symbol
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unsigned
char
transform(
unsigned
char
input) {
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unsigned
char
retval = m_fifo[m_commutator]->stuff(input);
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m_commutator++;
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if
(m_commutator >= 52)
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m_commutator = 0;
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return
retval;
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}
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/*!
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* Note: The use of the alignment_fifo keeps the encoder and decoder
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* aligned if both are synced to a field boundary. There may be other
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* ways to implement this function. This is a best guess as to how
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* this should behave, as we have no test vectors for either the
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* interleaver or deinterleaver.
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*/
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interleaver_fifo<unsigned char>
alignment_fifo;
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int
m_commutator;
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std::vector<interleaver_fifo<unsigned char> *> m_fifo;
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public
:
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atsc_deinterleaver_impl
();
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~atsc_deinterleaver_impl
();
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int
work
(
int
noutput_items,
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gr_vector_const_void_star
&input_items,
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gr_vector_void_star
&output_items);
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//! reset interleaver (flushes contents and resets commutator)
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void
reset
();
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//! sync interleaver (resets commutator, but doesn't flush fifos)
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void
sync
() { m_commutator = 0; }
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};
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}
/* namespace dtv */
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}
/* namespace gr */
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#endif
/* INCLUDED_DTV_ATSC_DEINTERLEAVER_IMPL_H */
gr-dtv
lib
atsc
atsc_deinterleaver_impl.h
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