fft.h
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00001 /****************************************************************
00002  *
00003  * Copyright (c) 2010
00004  *
00005  * Fraunhofer Institute for Manufacturing Engineering   
00006  * and Automation (IPA)
00007  *
00008  * +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
00009  *
00010  * Project name: care-o-bot
00011  * ROS stack name: cob_driver
00012  * ROS package name: cob_light
00013  * Description: Switch robots led color by sending data to
00014  * the led-µC over serial connection.
00015  *                              
00016  * +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
00017  *          
00018  * Author: Benjamin Maidel, email:benjamin.maidel@ipa.fraunhofer.de
00019  * Supervised by: Benjamin Maidel, email:benjamin.maidel@ipa.fraunhofer.de
00020  *
00021  * Date of creation: August 2012
00022  * ToDo:
00023  *
00024  * +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
00025  *
00026  * Redistribution and use in source and binary forms, with or without
00027  * modification, are permitted provided that the following conditions are met:
00028  *
00029  *     * Redistributions of source code must retain the above copyright
00030  *       notice, this list of conditions and the following disclaimer.
00031  *     * Redistributions in binary form must reproduce the above copyright
00032  *       notice, this list of conditions and the following disclaimer in the
00033  *       documentation and/or other materials provided with the distribution.
00034  *     * Neither the name of the Fraunhofer Institute for Manufacturing 
00035  *       Engineering and Automation (IPA) nor the names of its
00036  *       contributors may be used to endorse or promote products derived from
00037  *       this software without specific prior written permission.
00038  *
00039  * This program is free software: you can redistribute it and/or modify
00040  * it under the terms of the GNU Lesser General Public License LGPL as 
00041  * published by the Free Software Foundation, either version 3 of the 
00042  * License, or (at your option) any later version.
00043  * 
00044  * This program is distributed in the hope that it will be useful,
00045  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00046  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00047  * GNU Lesser General Public License LGPL for more details.
00048  * 
00049  * You should have received a copy of the GNU Lesser General Public 
00050  * License LGPL along with this program. 
00051  * If not, see <http://www.gnu.org/licenses/>.
00052  *
00053  ****************************************************************/
00054 
00055 #ifndef FFT_H
00056 #define FFT_H
00057 #include <fftw3.h>
00058 #include <inttypes.h>
00059 #include <cmath>
00060 #include "soundbuffer.h"
00077 #define USE_HANNING
00078 
00082 //#define CLEAR_NOISE
00083 
00084 namespace mybeat
00085 {
00086 
00087 class FFT
00088 {
00089 public:
00090 
00091     FFT(uint16_t m_size);
00092     ~FFT();
00093 
00094     void setSoundBuffer(SoundBuffer *value){m_SoundBuffer=value;}
00095 
00096     void process_data();
00097 
00098     double get_element_r(uint16_t pos);
00099 
00100     double get_element_i(uint16_t pos);
00101 
00102     double get_magnitude(uint16_t pos);
00103 
00104     double get_magnitude_max();
00105 
00106 private:
00107 
00108     SoundBuffer *m_SoundBuffer;
00109 
00110     uint16_t m_size;
00111 
00112     double *m_inputSignal;
00113 
00114     double *m_magnitude;
00115 
00116     double m_maxMagnitude;
00117 
00118     fftw_complex *m_outputSignal;
00119 
00120     fftw_plan plan_forward;
00121 };
00122 }
00123 
00124 #endif
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cob_lightmode
Author(s): Benjamin Maidel
autogenerated on Thu Jan 17 2013 12:16:04