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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
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "atsc_derandomizer_impl.h"
#include "gnuradio/dtv/atsc_consts.h"
#include <gnuradio/io_signature.h>
namespace gr {
namespace dtv {
atsc_derandomizer::sptr atsc_derandomizer::make()
{
return gnuradio::make_block_sptr<atsc_derandomizer_impl>();
}
atsc_derandomizer_impl::atsc_derandomizer_impl()
: gr::sync_block("dtv_atsc_derandomizer",
io_signature::make2(
2, 2, ATSC_MPEG_PKT_LENGTH * sizeof(uint8_t), sizeof(plinfo)),
io_signature::make(1, 1, ATSC_MPEG_PKT_LENGTH * sizeof(uint8_t)))
{
d_rand.reset();
}
int atsc_derandomizer_impl::work(int noutput_items,
gr_vector_const_void_star& input_items,
gr_vector_void_star& output_items)
{
auto in = static_cast<const uint8_t*>(input_items[0]);
auto out = static_cast<uint8_t*>(output_items[0]);
auto plin = static_cast<const plinfo*>(input_items[1]);
for (int i = 0; i < noutput_items; i++) {
assert(plin[i].regular_seg_p());
if (plin[i].first_regular_seg_p())
d_rand.reset();
d_rand.derandomize(&out[i * ATSC_MPEG_PKT_LENGTH], &in[i * ATSC_MPEG_PKT_LENGTH]);
// Check the pipeline info for error status and and set the
// corresponding bit in transport packet header.
if (plin[i].transport_error_p())
out[i * ATSC_MPEG_PKT_LENGTH + 1] |= MPEG_TRANSPORT_ERROR_BIT;
else
out[i * ATSC_MPEG_PKT_LENGTH + 1] &= ~MPEG_TRANSPORT_ERROR_BIT;
}
return noutput_items;
}
} /* namespace dtv */
} /* namespace gr */
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