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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 <dab_moving_sum_cc.h>
#include <gr_io_signature.h>
/*
* Create a new instance of dab_moving_sum_cc and return
* a boost shared_ptr. This is effectively the public constructor.
*/
dab_moving_sum_cc_sptr
dab_make_moving_sum_cc (int length)
{
return gnuradio::get_initial_sptr (new dab_moving_sum_cc (length));
}
/*
* 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
*/
dab_moving_sum_cc::dab_moving_sum_cc (int length)
: gr_sync_block ("moving_sum_cc",
gr_make_io_signature (MIN_IN, MAX_IN, sizeof (gr_complex)),
gr_make_io_signature (MIN_OUT, MAX_OUT, sizeof (gr_complex))),
d_sum(0), d_length(length)
{
assert(length>=0);
set_history(length+1);
set_output_multiple(length+1);
}
/*
* Our virtual destructor.
*/
dab_moving_sum_cc::~dab_moving_sum_cc ()
{
// nothing else required in this example
}
int
dab_moving_sum_cc::work (int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
const gr_complex *in = (const gr_complex *) input_items[0];
gr_complex *out = (gr_complex *) output_items[0];
for (int i=0; i < noutput_items; i++) {
d_sum+=(gr_complexd)in[i+d_length]-(gr_complexd)in[i];
out[i] = (gr_complex)d_sum;
}
// Tell runtime system how many output items we produced.
return noutput_items;
}
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