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/* -*- c++ -*- */
/*
* Copyright 2002 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 2, 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 _ATSC_DATA_INTERLEAVER_H_
#define _ATSC_DATA_INTERLEAVER_H_
#include <atsc_types.h>
#include <convolutional_interleaver.h>
/*!
* \brief atsc convolutional data interleaver
*/
class atsci_data_interleaver : public convolutional_interleaver<unsigned char> {
public:
atsci_data_interleaver () : convolutional_interleaver<unsigned char>(true, 52, 4) {}
void interleave (atsc_mpeg_packet_rs_encoded &out,
const atsc_mpeg_packet_rs_encoded &in);
};
/*!
* \brief atsc convolutional data deinterleaver
*/
class atsci_data_deinterleaver : public convolutional_interleaver<unsigned char> {
public:
atsci_data_deinterleaver () :
convolutional_interleaver<unsigned char>(false, 52, 4), alignment_fifo (156) {}
void deinterleave (atsc_mpeg_packet_rs_encoded &out,
const atsc_mpeg_packet_rs_encoded &in);
private:
/*!
* Note: The use of the alignment_fifo keeps the encoder and decoder
* aligned if both are synced to a field boundary. There may be other
* ways to implement this function. This is a best guess as to how
* this should behave, as we have no test vectors for either the
* interleaver or deinterleaver.
*/
interleaver_fifo<unsigned char> alignment_fifo;
static void remap_pli (plinfo &out, const plinfo &in);
};
#endif /* _ATSC_DATA_INTERLEAVER_H_ */
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