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/* -*- c++ -*- */
/*
* Copyright 2013 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 "tagged_stream_multiply_length_impl.h"
#include <gnuradio/io_signature.h>
namespace gr {
namespace blocks {
tagged_stream_multiply_length::sptr tagged_stream_multiply_length::make(
size_t itemsize, const std::string& lengthtagname, double scalar)
{
return gnuradio::get_initial_sptr(
new tagged_stream_multiply_length_impl(itemsize, lengthtagname, scalar));
}
tagged_stream_multiply_length_impl::tagged_stream_multiply_length_impl(
size_t itemsize, const std::string& lengthtagname, double scalar)
: block("tagged_stream_multiply_length",
io_signature::make(1, 1, itemsize),
io_signature::make(1, 1, itemsize)),
d_lengthtag(pmt::mp(lengthtagname)),
d_scalar(scalar),
d_itemsize(itemsize)
{
set_tag_propagation_policy(TPP_DONT);
set_relative_rate(1, 1);
message_port_register_in(pmt::intern("set_scalar"));
set_msg_handler(
pmt::intern("set_scalar"),
boost::bind(&tagged_stream_multiply_length_impl::set_scalar_pmt, this, _1));
}
tagged_stream_multiply_length_impl::~tagged_stream_multiply_length_impl() {}
int tagged_stream_multiply_length_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 void* in = input_items[0];
void* out = output_items[0];
// move data across ( wasteful memcopy :< )
memcpy(out, in, noutput_items * d_itemsize);
// move and update tags
std::vector<tag_t> tags;
get_tags_in_range(tags, 0, nitems_read(0), nitems_read(0) + noutput_items);
for (size_t i = 0; i < tags.size(); i++) {
if (pmt::eqv(tags[i].key, d_lengthtag)) {
// propagate with value update (scaled)
add_item_tag(0,
tags[i].offset,
tags[i].key,
pmt::from_long(pmt::to_long(tags[i].value) * d_scalar),
tags[i].srcid);
} else {
// propagate unmodified
add_item_tag(0, tags[i].offset, tags[i].key, tags[i].value, tags[i].srcid);
}
}
consume_each(noutput_items);
return noutput_items;
}
} /* namespace blocks */
} /* namespace gr */
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