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/* -*- c++ -*- */
/*
* Copyright 2004,2010,2012 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.
*/
/*
* config.h is generated by configure. It contains the results
* of probing for features, options etc. It should be the first
* file included in your .cc file.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "square_ff_impl.h"
#include <gr_io_signature.h>
namespace gr {
namespace howto {
/*
* Create a new instance of howto_square_ff and return a boost
* shared_ptr. This is effectively the public constructor.
*/
square_ff::sptr
square_ff::make()
{
return gnuradio::get_initial_sptr
(new square_ff_impl());
}
/*
* Specify constraints on number of input and output streams.
* This info is used to construct the input and output signatures
* (2nd & 3rd args to gr_block's constructor). The input and
* output signatures are used by the runtime system to
* check that a valid number and type of inputs and outputs
* are connected to this block. In this case, we accept
* only 1 input and 1 output.
*/
static const int MIN_IN = 1; // mininum number of input streams
static const int MAX_IN = 1; // maximum number of input streams
static const int MIN_OUT = 1; // minimum number of output streams
static const int MAX_OUT = 1; // maximum number of output streams
/*
* The private constructor
*/
square_ff_impl::square_ff_impl()
: gr_block("square_ff",
gr_make_io_signature(MIN_IN, MAX_IN, sizeof(float)),
gr_make_io_signature(MIN_OUT, MAX_OUT, sizeof(float)))
{
// nothing else required in this example
}
/*
* Our virtual destructor.
*/
square_ff_impl::~square_ff_impl()
{
// nothing else required in this example
}
int
square_ff_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++) {
out[i] = in[i] * in[i];
}
// Tell runtime system how many input items we consumed on
// each input stream.
consume_each(noutput_items);
// Tell runtime system how many output items we produced.
return noutput_items;
}
} /* namespace howto */
} /* namespace gr */
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