probe_avg_mag_sqrd_cf.h

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/* -*- c++ -*- */
/*
 * Copyright 2005,2006,2012 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_ANALOG_PROBE_AVG_MAG_SQRD_CF_H
#define INCLUDED_ANALOG_PROBE_AVG_MAG_SQRD_CF_H
 
#include <gnuradio/analog/api.h>
#include <gnuradio/sync_block.h>
 
namespace gr {
namespace analog {
 
/*!
 * \brief compute avg magnitude squared.
 * \ingroup measurement_tools_blk
 *
 * \details
 * Input stream 0: complex
 * Output stream 0: float
 *
 * Compute a running average of the magnitude squared of the the
 * input. The level and indication as to whether the level exceeds
 * threshold can be retrieved with the level and unmuted
 * accessors.
 */
class ANALOG_API probe_avg_mag_sqrd_cf : virtual public sync_block
{
public:
    // gr::analog::probe_avg_mag_sqrd_cf::sptr
    typedef boost::shared_ptr<probe_avg_mag_sqrd_cf> sptr;
 
    /*!
     * \brief Make a block that computes avg magnitude squared.
     *
     * \param threshold_db Threshold for muting.
     * \param alpha Gain parameter for the running average filter.
     */
    static sptr make(double threshold_db, double alpha = 0.0001);
 
    virtual bool unmuted() const = 0;
    virtual double level() const = 0;
    virtual double threshold() const = 0;
 
    virtual void set_alpha(double alpha) = 0;
    virtual void set_threshold(double decibels) = 0;
    virtual void reset() = 0;
};
 
} /* namespace analog */
} /* namespace gr */
 
#endif /* INCLUDED_ANALOG_PROBE_AVG_MAG_SQRD_CF_H */