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/* -*- c++ -*- */
/*
* Copyright 2015,2016 Free Software Foundation, Inc.
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "atsc_interleaver_impl.h"
#include "gnuradio/dtv/atsc_consts.h"
namespace gr {
namespace dtv {
atsc_interleaver::sptr atsc_interleaver::make()
{
return gnuradio::make_block_sptr<atsc_interleaver_impl>();
}
atsc_interleaver_impl::atsc_interleaver_impl()
: gr::sync_block("atsc_interleaver",
gr::io_signature::make(1, 1, sizeof(atsc_mpeg_packet_rs_encoded)),
gr::io_signature::make(1, 1, sizeof(atsc_mpeg_packet_rs_encoded)))
{
I = 52; /* ATSC interleaver */
J = 4;
registers = (unsigned char*)malloc(sizeof(unsigned char) * I * ((I - 1) * J));
if (registers == NULL) {
GR_LOG_FATAL(d_logger, "ATSC Interleaver, cannot allocate memory for registers.");
throw std::bad_alloc();
}
pointers = (int*)malloc(sizeof(int) * I);
if (pointers == NULL) {
free(registers);
GR_LOG_FATAL(d_logger, "ATSC Interleaver, cannot allocate memory for pointers");
throw std::bad_alloc();
}
memset(registers, 0, sizeof(unsigned char) * I * ((I - 1) * J));
memset(pointers, 0, sizeof(int) * I);
commutator = 0;
}
atsc_interleaver_impl::~atsc_interleaver_impl()
{
free(pointers);
free(registers);
}
int atsc_interleaver_impl::work(int noutput_items,
gr_vector_const_void_star& input_items,
gr_vector_void_star& output_items)
{
const atsc_mpeg_packet_rs_encoded* in =
(const atsc_mpeg_packet_rs_encoded*)input_items[0];
atsc_mpeg_packet_rs_encoded* out = (atsc_mpeg_packet_rs_encoded*)output_items[0];
int p, n = ATSC_MPEG_RS_ENCODED_LENGTH;
for (int i = 0; i < noutput_items; i++) {
assert(in[i].pli.regular_seg_p());
out[i].pli = in[i].pli; // copy pipeline info
if (in[i].pli.first_regular_seg_p()) { // reset commutator if required
commutator = 0;
}
for (int j = 0; j < n; j++) {
if (commutator == 0) {
out[i].data[j] = in[i].data[j];
} else {
p = pointers[commutator];
out[i].data[j] = registers[commutator * (I - 1) * J + p];
registers[commutator * (I - 1) * J + p] = in[i].data[j];
pointers[commutator] = (p + 1) % (commutator * J);
}
commutator = (commutator + 1) % I;
}
}
// Tell runtime system how many output items we produced.
return noutput_items;
}
} /* namespace dtv */
} /* namespace gr */
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