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/* -*- c++ -*- */
/*
* Copyright 2004 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 <gnuradio/io_signature.h>
#include "modulo_ff_impl.h"
#include <math.h>
namespace gr {
namespace dab {
modulo_ff::sptr
modulo_ff::make(float div)
{
return gnuradio::get_initial_sptr
(new modulo_ff_impl(div));
}
/*
* 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
*/
modulo_ff_impl::modulo_ff_impl(float div)
: gr::sync_block("modulo_ff",
gr::io_signature::make (MIN_IN, MAX_IN, sizeof (float)),
gr::io_signature::make (MIN_OUT, MAX_OUT, sizeof (float))),
d_div(div)
{
}
/*
* Our virtual destructor.
*/
modulo_ff_impl::~modulo_ff_impl()
{
// nothing else required in this example
}
int
modulo_ff_impl::work(int noutput_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++ = *in - d_div*floor(*in / d_div);
in++;
}
// Tell runtime system how many output items we produced.
return noutput_items;
}
}
}
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