00001 /* -*- c++ -*- */ 00002 /* 00003 * Copyright 2007 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 00023 #ifndef INCLUDED_gr_peak_detector2_FB_H 00024 #define INCLUDED_gr_peak_detector2_FB_H 00025 00026 #include <gr_sync_block.h> 00027 00028 class gr_peak_detector2_fb; 00029 typedef boost::shared_ptr<gr_peak_detector2_fb> gr_peak_detector2_fb_sptr; 00030 00031 gr_peak_detector2_fb_sptr gr_make_peak_detector2_fb (float threshold_factor_rise = 7, 00032 int look_ahead = 1000, 00033 float alpha = 0.001); 00034 00052 class gr_peak_detector2_fb : public gr_sync_block 00053 { 00054 friend gr_peak_detector2_fb_sptr 00055 gr_make_peak_detector2_fb (float threshold_factor_rise, int look_ahead, float alpha); 00056 00057 gr_peak_detector2_fb (float threshold_factor_rise, int look_ahead, float alpha); 00058 00059 private: 00060 float d_threshold_factor_rise; 00061 int d_look_ahead; 00062 int d_look_ahead_remaining; 00063 int d_peak_ind; 00064 float d_peak_val; 00065 float d_alpha; 00066 float d_avg; 00067 bool d_found; 00068 00069 public: 00070 00074 void set_threshold_factor_rise(float thr) { d_threshold_factor_rise = thr; } 00075 00079 void set_look_ahead(int look) { d_look_ahead = look; } 00080 00084 void set_alpha(int alpha) { d_alpha = alpha; } 00085 00089 float threshold_factor_rise() { return d_threshold_factor_rise; } 00090 00094 int look_ahead() { return d_look_ahead; } 00095 00099 float alpha() { return d_alpha; } 00100 00101 int work (int noutput_items, 00102 gr_vector_const_void_star &input_items, 00103 gr_vector_void_star &output_items); 00104 }; 00105 00106 #endif 00107 00108