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/* -*- c++ -*- */
/*
* Gqrx SDR: Software defined radio receiver powered by GNU Radio and Qt
* http://gqrx.dk/
*
* Copyright 2011 Alexandru Csete OZ9AEC.
*
* Gqrx 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.
*
* Gqrx 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 Gqrx; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef RX_AGC_XX_H
#define RX_AGC_XX_H
#include <gnuradio/sync_block.h>
#include <gnuradio/gr_complex.h>
#include <boost/thread/mutex.hpp>
#include <dsp/agc_impl.h>
class rx_agc_cc;
typedef boost::shared_ptr<rx_agc_cc> rx_agc_cc_sptr;
/*! \brief Return a shared_ptr to a new instance of rx_agc_cc.
* \param sample_rate The samle rate (default = 96000).
* \param agc_on Whether AGC should be ON (default = true).
* \param threshold AGC Knee in dB if AGC is active. Range -160 to 0dB
* (default = -100dB).
* \param manual_gain Manual gain when AGC is OFF. Range 0 to 100dB
* (default = 0dB).
* \param slope AGC slope factor. Specifies dB reduction in output at
* knee from maximum output level. Range 0 to 10dB
* (default = 2dB TBC).
* \param decay AGC decay time in milliseconds. Range 20 to 5000. This
* parameter determines whether AGC is fast/slow/medium.
* The default value is 100ms (fast AGC).
* \param use_hang Whether AGC should "hang" before starting to decay.
* The default is false.
*
* This is effectively the public constructor for a new AGC block.
* To avoid accidental use of raw pointers, the rx_agc_cc constructor is private.
* make_rx_agc_cc is the public interface for creating new instances.
*/
rx_agc_cc_sptr make_rx_agc_cc(double sample_rate = 96000.0, bool agc_on = true,
int threshold = -100, int manual_gain = 0,
int slope = 2, int decay = 100,
bool use_hang = false);
/*! \brief Experimental AGC block for analog voice modes (AM, SSB, CW).
* \ingroup DSP
*
* This block performs automatic gain control.
* To be written...
*
* \todo rx_agc_ff
*/
class rx_agc_cc : public gr::sync_block
{
friend rx_agc_cc_sptr make_rx_agc_cc(double sample_rate, bool agc_on,
int threshold, int manual_gain,
int slope, int decay, bool use_hang);
protected:
rx_agc_cc(double sample_rate, bool agc_on, int threshold, int manual_gain,
int slope, int decay, bool use_hang);
public:
~rx_agc_cc();
int work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
void set_agc_on(bool agc_on);
void set_sample_rate(double sample_rate);
void set_threshold(int threshold);
void set_manual_gain(int gain);
void set_slope(int slope);
void set_decay(int decay);
void set_use_hang(bool use_hang);
private:
CAgc *d_agc;
boost::mutex d_mutex; /*! Used to lock internal data while processing or setting parameters. */
bool d_agc_on; /*! Current AGC status (true/false). */
double d_sample_rate; /*! Current sample rate. */
int d_threshold; /*! Current AGC threshold (-160...0 dB). */
int d_manual_gain; /*! Current gain when AGC is OFF. */
int d_slope; /*! Current AGC slope (0...10 dB). */
int d_decay; /*! Current AGC decay (20...5000 ms). */
bool d_use_hang; /*! Current AGC hang status (true/false). */
TYPECPX ib[64000];
TYPECPX ob[64000];
};
#endif /* RX_AGC_XX_H */
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