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/* -*- c++ -*- */
/*
* Copyright 2006,2010 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.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <atsc_derandomizer.h>
#include <gr_io_signature.h>
#include <atsc_consts.h>
atsc_derandomizer_sptr
atsc_make_derandomizer()
{
return gnuradio::get_initial_sptr(new atsc_derandomizer());
}
atsc_derandomizer::atsc_derandomizer()
: gr_sync_block("atsc_derandomizer",
gr_make_io_signature(1, 1, sizeof(atsc_mpeg_packet_no_sync)),
gr_make_io_signature(1, 1, sizeof(atsc_mpeg_packet)))
{
reset();
}
void
atsc_derandomizer::reset()
{
d_rand.reset();
}
int
atsc_derandomizer::work (int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
const atsc_mpeg_packet_no_sync *in = (const atsc_mpeg_packet_no_sync *) input_items[0];
atsc_mpeg_packet *out = (atsc_mpeg_packet *) output_items[0];
for (int i = 0; i < noutput_items; i++){
assert(in[i].pli.regular_seg_p());
if (in[i].pli.first_regular_seg_p())
d_rand.reset();
d_rand.derandomize(out[i], in[i]);
// Check the pipeline info for error status and and set the
// corresponding bit in transport packet header.
if (in[i].pli.transport_error_p())
out[i].data[1] |= MPEG_TRANSPORT_ERROR_BIT;
else
out[i].data[1] &= ~MPEG_TRANSPORT_ERROR_BIT;
}
return noutput_items;
}
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