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/* -*- c++ -*- */
/*
* Copyright 2008,2013,2017,2018 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.
*/
#ifndef MOVING_AVERAGE_H
#define MOVING_AVERAGE_H
#include <gnuradio/blocks/api.h>
#include <gnuradio/sync_block.h>
#include <cstdint>
namespace gr {
namespace blocks {
/*!
* \brief output is the moving sum of the last N samples, scaled by the scale factor
* \ingroup level_controllers_blk
*/
template <class T>
class BLOCKS_API moving_average : virtual public sync_block
{
public:
// gr::blocks::moving_average::sptr
typedef boost::shared_ptr<moving_average<T>> sptr;
/*!
* Create a moving average block.
*
* \param length Number of samples to use in the average.
* \param scale scale factor for the result.
* \param max_iter limits how long we go without flushing the accumulator
* This is necessary to avoid numerical instability for float and complex.
* \param vlen When > 1, do a per-vector-element moving average
*/
static sptr make(int length, T scale, int max_iter = 4096, unsigned int vlen = 1);
/*!
* Get the length used in the avaraging calculation.
*/
virtual int length() const = 0;
/*!
* Get the scale factor being used.
*/
virtual T scale() const = 0;
/*!
* Set both the length and the scale factor together.
*/
virtual void set_length_and_scale(int length, T scale) = 0;
/*!
* Set the length.
*/
virtual void set_length(int length) = 0;
/*!
* Set the scale factor.
*/
virtual void set_scale(T scale) = 0;
};
typedef moving_average<std::int16_t> moving_average_ss;
typedef moving_average<std::int32_t> moving_average_ii;
typedef moving_average<float> moving_average_ff;
typedef moving_average<gr_complex> moving_average_cc;
} /* namespace blocks */
} /* namespace gr */
#endif /* MOVING_AVERAGE_H */
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