GNU Radio 3.7.1 C++ API
probe_avg_mag_sqrd_c.h
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00001 /* -*- c++ -*- */
00002 /*
00003  * Copyright 2005,2006,2012 Free Software Foundation, Inc.
00004  *
00005  * This file is part of GNU Radio
00006  *
00007  * GNU Radio is free software; you can redistribute it and/or modify
00008  * it under the terms of the GNU General Public License as published by
00009  * the Free Software Foundation; either version 3, or (at your option)
00010  * any later version.
00011  *
00012  * GNU Radio is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU General Public License
00018  * along with GNU Radio; see the file COPYING.  If not, write to
00019  * the Free Software Foundation, Inc., 51 Franklin Street,
00020  * Boston, MA 02110-1301, USA.
00021  */
00022 #ifndef INCLUDED_ANALOG_PROBE_AVG_MAG_SQRD_C_H
00023 #define INCLUDED_ANALOG_PROBE_AVG_MAG_SQRD_C_H
00024 
00025 #include <gnuradio/analog/api.h>
00026 #include <gnuradio/sync_block.h>
00027 
00028 namespace gr {
00029   namespace analog {
00030     
00031     /*!
00032      * \brief compute avg magnitude squared.
00033      * \ingroup measurement_tools_blk
00034      *
00035      * \details
00036      * Input stream 0: complex
00037      *
00038      * Compute a running average of the magnitude squared of the the
00039      * input. The level and indication as to whether the level exceeds
00040      * threshold can be retrieved with the level and unmuted
00041      * accessors.
00042      */
00043     class ANALOG_API probe_avg_mag_sqrd_c : virtual public sync_block
00044     {
00045     public:
00046       // gr::analog::probe_avg_mag_sqrd_c::sptr
00047       typedef boost::shared_ptr<probe_avg_mag_sqrd_c> sptr;
00048 
00049       /*!
00050        * \brief Make a complex sink that computes avg magnitude squared.
00051        *
00052        * \param threshold_db Threshold for muting.
00053        * \param alpha Gain parameter for the running average filter.
00054        */
00055       static sptr make(double threshold_db, double alpha = 0.0001);
00056 
00057       virtual bool unmuted() const = 0;
00058       virtual double level() const = 0;
00059       virtual double threshold() const = 0;
00060 
00061       virtual void set_alpha(double alpha) = 0;
00062       virtual void set_threshold(double decibels) = 0;
00063     };
00064 
00065   } /* namespace analog */
00066 } /* namespace gr */
00067 
00068 #endif /* INCLUDED_ANALOG_PROBE_AVG_MAG_SQRD_C_H */