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/* -*- c++ -*- */
/*
* Copyright 2007,2013,2015 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifndef INCLUDED_GR_PEAK_DETECTOR2_FB_H
#define INCLUDED_GR_PEAK_DETECTOR2_FB_H
#include <gnuradio/blocks/api.h>
#include <gnuradio/sync_block.h>
namespace gr {
namespace blocks {
/*!
* \brief Detect the peak of a signal
* \ingroup peak_detectors_blk
*
* \details
* 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 estimated mean described below.
*/
class BLOCKS_API peak_detector2_fb : virtual public sync_block
{
public:
// gr::blocks::peak_detector2_fb::sptr
typedef std::shared_ptr<peak_detector2_fb> sptr;
/*!
* Build a peak detector block with float in, byte out.
*
* \param threshold_factor_rise The threshold factor determines
* when a peak is present. An average of the input signal
* is calculated (through a single-pole autoregressive
* filter) and when the value of the input signal goes
* over threshold_factor_rise*average, we assume we are
* in the neighborhood of a peak. The block will then
* find the position of the maximum within a window of
* look_ahead samples starting at the point where the
* threshold was crossed upwards.
* \param look_ahead The look-ahead value is used when the
* threshold is crossed upwards to locate the peak within
* this range.
* \param alpha One minus the pole of a single-pole
* autoregressive filter that evaluates the average of
* the input signal.
*/
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(float 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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