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/* -*- c++ -*- */
/*
* Copyright 2017 Moritz Luca Schmid, Communications Engineering Lab (CEL) / Karlsruhe Institute of Technology (KIT).
*
* This 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.
*
* This software 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 this software; 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 <gnuradio/io_signature.h>
#include "prune_impl.h"
#include <stdexcept>
#include <stdio.h>
#include <sstream>
#include <boost/format.hpp>
namespace gr {
namespace dab {
prune::sptr
prune::make(size_t itemsize, unsigned int length, unsigned int prune_start, unsigned int prune_end)
{
return gnuradio::get_initial_sptr
(new prune_impl(itemsize, length, prune_start, prune_end));
}
/*
* The private constructor
*/
prune_impl::prune_impl(size_t itemsize, unsigned int length, unsigned int prune_start, unsigned int prune_end)
: gr::block("prune",
gr::io_signature::make(1, 1, sizeof(char)),
gr::io_signature::make(1, 1, sizeof(char))),
d_itemsize(itemsize), d_length(length), d_prune_start(prune_start), d_prune_end(prune_end)
{
if (prune_start + prune_end > length)
throw std::out_of_range((boost::format("want to cut %d more items than stream is long") % (prune_start + prune_end - length)).str());
set_output_multiple(length - prune_start - prune_end);
set_relative_rate(((float)(length - prune_start - prune_end)) / length);
set_tag_propagation_policy(TPP_DONT);
}
/*
* Our virtual destructor.
*/
prune_impl::~prune_impl()
{
}
void
prune_impl::forecast(int noutput_items, gr_vector_int &ninput_items_required)
{
ninput_items_required[0] = (noutput_items / (d_length - d_prune_start - d_prune_end)) * d_length;
}
int
prune_impl::general_work(int noutput_items,
gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
const char *in = (const char *) input_items[0];
char *out = (char *) output_items[0];
int n_produced = 0;
for (int i = 0; i < noutput_items / (d_length - d_prune_start - d_prune_end); i++) {
add_item_tag(0, nitems_written(0) + n_produced, pmt::intern("first"), pmt::intern(""), pmt::intern("prune"));
memcpy(out, in + d_prune_start * d_itemsize, (d_length - d_prune_start - d_prune_end) * d_itemsize);
in += d_length * d_itemsize;
out += (d_length - d_prune_start - d_prune_end) * d_itemsize;
n_produced += (d_length - d_prune_start - d_prune_end);
}
// Tell runtime system how many input items we consumed on
// each input stream.
consume_each((noutput_items / (d_length - d_prune_start - d_prune_end)) * d_length);
// Tell runtime system how many output items we produced.
return noutput_items;
}
} /* namespace dab */
} /* namespace gr */
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