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/* -*- c++ -*- */
/*
* Copyright 2007,2013 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 INCLUDED_GR_PEAK_DETECTOR2_FB_H
#define INCLUDED_GR_PEAK_DETECTOR2_FB_H
#include <blocks/api.h>
#include <gr_sync_block.h>
namespace gr {
namespace blocks {
/*!
* \brief Detect the peak of a signal
* \ingroup level_blk
*
* If a peak is detected, this block outputs a 1, or it outputs
* 0's. A separate debug output may be connected, to view the
* internal EWMA described below.
*
* \param threshold_factor_rise The threshold factor determins
* when a peak is present. An EWMA average of the signal is
* calculated and when the value of the signal goes over
* threshold_factor_rise*average, we call the peak.
* \param look_ahead The look-ahead value is used when the
* threshold is found to locate the peak within this range.
* \param alpha The gain value of a single-pole moving average filter.
*/
class BLOCKS_API peak_detector2_fb : virtual public gr_sync_block
{
public:
// gr::blocks::peak_detector2_fb::sptr
typedef boost::shared_ptr<peak_detector2_fb> sptr;
static sptr make(float threshold_factor_rise=7,
int look_ahead=1000, float alpha=0.001);
/*! \brief Set the threshold factor value for the rise time
* \param thr new threshold factor
*/
virtual void set_threshold_factor_rise(float thr) = 0;
/*! \brief Set the look-ahead factor
* \param look new look-ahead factor
*/
virtual void set_look_ahead(int look) = 0;
/*! \brief Set the running average alpha
* \param alpha new alpha for running average
*/
virtual void set_alpha(int alpha) = 0;
/*! \brief Get the threshold factor value for the rise time
* \return threshold factor
*/
virtual float threshold_factor_rise() = 0;
/*! \brief Get the look-ahead factor value
* \return look-ahead factor
*/
virtual int look_ahead() = 0;
/*! \brief Get the alpha value of the running average
* \return alpha
*/
virtual float alpha() = 0;
};
} /* namespace blocks */
} /* namespace gr */
#endif /* INCLUDED_GR_PEAK_DETECTOR2_FB_H */
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