GNU Radio 3.5.3.2 C++ API
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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 // WARNING: this file is machine generated. Edits will be over written 00024 00025 #ifndef INCLUDED_GR_PEAK_DETECTOR_IB_H 00026 #define INCLUDED_GR_PEAK_DETECTOR_IB_H 00027 00028 #include <gr_core_api.h> 00029 #include <gr_sync_block.h> 00030 00031 class gr_peak_detector_ib; 00032 typedef boost::shared_ptr<gr_peak_detector_ib> gr_peak_detector_ib_sptr; 00033 00034 GR_CORE_API gr_peak_detector_ib_sptr gr_make_peak_detector_ib (float threshold_factor_rise = 0.25, 00035 float threshold_factor_fall = 0.40, 00036 int look_ahead = 10, 00037 float alpha = 0.001); 00038 00039 /*! 00040 * \brief Detect the peak of a signal 00041 * \ingroup level_blk 00042 * 00043 * If a peak is detected, this block outputs a 1, 00044 * or it outputs 0's. 00045 * 00046 * \param threshold_factor_rise The threshold factor determins when a peak 00047 * has started. An average of the signal is calculated and when the 00048 * value of the signal goes over threshold_factor_rise*average, we 00049 * start looking for a peak. 00050 * \param threshold_factor_fall The threshold factor determins when a peak 00051 * has ended. An average of the signal is calculated and when the 00052 * value of the signal goes bellow threshold_factor_fall*average, we 00053 * stop looking for a peak. 00054 * \param look_ahead The look-ahead value is used when the threshold is 00055 * found to look if there another peak within this step range. 00056 * If there is a larger value, we set that as the peak and look ahead 00057 * again. This is continued until the highest point is found with 00058 * This look-ahead range. 00059 * \param alpha The gain value of a moving average filter 00060 */ 00061 class GR_CORE_API gr_peak_detector_ib : public gr_sync_block 00062 { 00063 friend GR_CORE_API gr_peak_detector_ib_sptr gr_make_peak_detector_ib (float threshold_factor_rise, 00064 float threshold_factor_fall, 00065 int look_ahead, float alpha); 00066 00067 gr_peak_detector_ib (float threshold_factor_rise, 00068 float threshold_factor_fall, 00069 int look_ahead, float alpha); 00070 00071 private: 00072 float d_threshold_factor_rise; 00073 float d_threshold_factor_fall; 00074 int d_look_ahead; 00075 float d_avg_alpha; 00076 float d_avg; 00077 unsigned char d_found; 00078 00079 public: 00080 00081 /*! \brief Set the threshold factor value for the rise time 00082 * \param thr new threshold factor 00083 */ 00084 void set_threshold_factor_rise(float thr) { d_threshold_factor_rise = thr; } 00085 00086 /*! \brief Set the threshold factor value for the fall time 00087 * \param thr new threshold factor 00088 */ 00089 void set_threshold_factor_fall(float thr) { d_threshold_factor_fall = thr; } 00090 00091 /*! \brief Set the look-ahead factor 00092 * \param look new look-ahead factor 00093 */ 00094 void set_look_ahead(int look) { d_look_ahead = look; } 00095 00096 /*! \brief Set the running average alpha 00097 * \param alpha new alpha for running average 00098 */ 00099 void set_alpha(int alpha) { d_avg_alpha = alpha; } 00100 00101 /*! \brief Get the threshold factor value for the rise time 00102 * \return threshold factor 00103 */ 00104 float threshold_factor_rise() { return d_threshold_factor_rise; } 00105 00106 /*! \brief Get the threshold factor value for the fall time 00107 * \return threshold factor 00108 */ 00109 float threshold_factor_fall() { return d_threshold_factor_fall; } 00110 00111 /*! \brief Get the look-ahead factor value 00112 * \return look-ahead factor 00113 */ 00114 int look_ahead() { return d_look_ahead; } 00115 00116 /*! \brief Get the alpha value of the running average 00117 * \return alpha 00118 */ 00119 float alpha() { return d_avg_alpha; } 00120 00121 int work (int noutput_items, 00122 gr_vector_const_void_star &input_items, 00123 gr_vector_void_star &output_items); 00124 }; 00125 00126 #endif