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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 "select_subch_vfvf_impl.h"
namespace gr {
namespace dab {
select_subch_vfvf::sptr
select_subch_vfvf::make(unsigned int vlen_in, unsigned int vlen_out, unsigned int address,
unsigned int total_size)
{
return gnuradio::get_initial_sptr
(new select_subch_vfvf_impl(vlen_in, vlen_out, address, total_size));
}
/*
* The private constructor
*/
select_subch_vfvf_impl::select_subch_vfvf_impl(unsigned int vlen_in, unsigned int vlen_out,
unsigned int address, unsigned int total_size)
: gr::block("select_subch_vfvf",
gr::io_signature::make(1, 1, sizeof(float) * vlen_in),
gr::io_signature::make(1, 1, sizeof(float) * vlen_out)),
d_vlen_in(vlen_in), d_vlen_out(vlen_out), d_address(address), d_total_size(total_size)
{
//sanity check
if (vlen_out % vlen_in != 0)
throw std::invalid_argument("vlen_out no multiple of vlen_in");
if (address * vlen_in + vlen_out > total_size * vlen_in)
throw std::out_of_range("vlen_out too long or address wrong");
set_relative_rate(1.0 / total_size);
}
/*
* Our virtual destructor.
*/
select_subch_vfvf_impl::~select_subch_vfvf_impl()
{
}
void
select_subch_vfvf_impl::forecast(int noutput_items, gr_vector_int &ninput_items_required)
{
ninput_items_required[0] = noutput_items * d_total_size;
}
int
select_subch_vfvf_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 float *in = (const float *) input_items[0];
float *out = (float *) output_items[0];
for (int i = 0; i < noutput_items; i++) {
memcpy(&out[i * d_vlen_out], &in[d_vlen_in * (i * d_total_size + d_address)],
d_vlen_out * sizeof(float));
}
// Tell runtime system how many input items we consumed on
// each input stream.
consume_each(noutput_items * d_total_size);
// Tell runtime system how many output items we produced.
return noutput_items;
}
} /* namespace dab */
} /* namespace gr */
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