/* -*- c++ -*- */
/*
 * Copyright 2006,2012 Free Software Foundation, Inc.
 *
 * This file is part of GNU Radio
 *
 * SPDX-License-Identifier: GPL-3.0-or-later
 *
 */

#ifndef INCLUDED_ANALOG_AGC3_CC_H
#define INCLUDED_ANALOG_AGC3_CC_H

#include <gnuradio/analog/api.h>
#include <gnuradio/sync_block.h>

namespace gr {
namespace analog {

/*!
 * \brief high performance Automatic Gain Control class with
 * attack and decay rates.
 * \ingroup level_controllers_blk
 *
 * \details
 * Unlike the AGC2 loop, this uses an initial linear calculation
 * at the beginning for very fast initial acquisition. Moves to
 * IIR model for tracking purposes.
 *
 * For Power the absolute value of the complex number is used.
 */
class ANALOG_API agc3_cc : virtual public sync_block
{
public:
    // gr::analog::agc3_cc::sptr
    typedef std::shared_ptr<agc3_cc> sptr;

    /*!
     * Build a complex value AGC loop block with attack and decay rates.
     *
     * \param attack_rate the update rate of the loop when in attack mode.
     * \param decay_rate the update rate of the loop when in decay mode.
     * \param reference reference value to adjust signal power to.
     * \param gain initial gain value.
     * \param iir_update_decim stride by this number of samples before
     *                         computing an IIR gain update
     */
    static sptr make(float attack_rate = 1e-1,
                     float decay_rate = 1e-2,
                     float reference = 1.0,
                     float gain = 1.0,
                     int iir_update_decim = 1);

    virtual float attack_rate() const = 0;
    virtual float decay_rate() const = 0;
    virtual float reference() const = 0;
    virtual float gain() const = 0;
    virtual float max_gain() const = 0;

    virtual void set_attack_rate(float rate) = 0;
    virtual void set_decay_rate(float rate) = 0;
    virtual void set_reference(float reference) = 0;
    virtual void set_gain(float gain) = 0;
    virtual void set_max_gain(float max_gain) = 0;
};

} /* namespace analog */
} /* namespace gr */

#endif /* INCLUDED_ANALOG_AGC3_CC_H */
