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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 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 _ATSC_TRELLIS_ENCODER_H_
#define _ATSC_TRELLIS_ENCODER_H_
#include <atsci_basic_trellis_encoder.h>
#include <atsc_types.h>
/*!
* \brief fancy, schmancy 12-way interleaved trellis encoder for ATSC
*/
class atsci_trellis_encoder {
public:
static const int NCODERS = 12;
atsci_trellis_encoder ();
~atsci_trellis_encoder ();
//! reset all encoder states
void reset ();
/*!
* Take 12 RS encoded, convolutionally interleaved segments and
* produce 12 trellis coded data segments. We work in groups of 12
* because that's the smallest number of segments that composes a
* single full cycle of the encoder mux.
*/
void encode (atsc_data_segment out[NCODERS],
const atsc_mpeg_packet_rs_encoded in[NCODERS]);
protected:
static const int SEGMENT_SIZE = ATSC_MPEG_RS_ENCODED_LENGTH; // 207
static const int INPUT_SIZE = (SEGMENT_SIZE * 12);
static const int OUTPUT_SIZE = (ATSC_DATA_SEGMENT_LENGTH * 12);
void encode_helper (unsigned char out[OUTPUT_SIZE],
const unsigned char in[INPUT_SIZE]);
atsci_basic_trellis_encoder enc[NCODERS];
bool debug;
};
#endif /* _ATSC_TRELLIS_ENCODER_H_ */
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