GNU Radio 3.5.3.2 C++ API
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00001 /* -*- c++ -*- */ 00002 /* 00003 * Copyright 2005,2006 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_GR_PROBE_AVG_MAG_SQRD_CF_H 00023 #define INCLUDED_GR_PROBE_AVG_MAG_SQRD_CF_H 00024 00025 #include <gr_core_api.h> 00026 #include <gr_sync_block.h> 00027 #include <gr_single_pole_iir.h> 00028 00029 class gr_probe_avg_mag_sqrd_cf; 00030 typedef boost::shared_ptr<gr_probe_avg_mag_sqrd_cf> gr_probe_avg_mag_sqrd_cf_sptr; 00031 00032 GR_CORE_API gr_probe_avg_mag_sqrd_cf_sptr 00033 gr_make_probe_avg_mag_sqrd_cf (double threshold_db, double alpha = 0.0001); 00034 00035 /*! 00036 * \brief compute avg magnitude squared. 00037 * \ingroup sink_blk 00038 * 00039 * input: gr_complex 00040 * output: gr_float 00041 * 00042 * Compute a running average of the magnitude squared of the the input. 00043 * The level and indication as to whether the level exceeds threshold 00044 * can be retrieved with the level and unmuted accessors. 00045 * 00046 */ 00047 class GR_CORE_API gr_probe_avg_mag_sqrd_cf : public gr_sync_block 00048 { 00049 double d_threshold; 00050 gr_single_pole_iir<double,double,double> d_iir; 00051 bool d_unmuted; 00052 double d_level; 00053 00054 friend GR_CORE_API gr_probe_avg_mag_sqrd_cf_sptr 00055 gr_make_probe_avg_mag_sqrd_cf (double threshold_db, double alpha); 00056 00057 gr_probe_avg_mag_sqrd_cf (double threshold_db, double alpha); 00058 00059 public: 00060 ~gr_probe_avg_mag_sqrd_cf (); 00061 00062 int work (int noutput_items, 00063 gr_vector_const_void_star &input_items, 00064 gr_vector_void_star &output_items); 00065 00066 // ACCESSORS 00067 bool unmuted () const { return d_unmuted; } 00068 double level () const { return d_level; } 00069 00070 double threshold() const; 00071 00072 // SETTERS 00073 void set_alpha (double alpha); 00074 void set_threshold (double decibels); 00075 }; 00076 00077 #endif /* INCLUDED_GR_PROBE_AVG_MAG_SQRD_CF_H */