sonar_fft.h

00001 #ifndef SEABEE3_SONAR_FFT_H
00002 #define SEABEE3_SONAR_FFT_H
00003 
00004 #include <fftw3.h>
00005 
00006 namespace SeaBee3_Sonar {
00007 
00008 bool isValidADCNumber(int adc_number);
00009 
00010 class DataToFFT {
00011   public:
00012     DataToFFT(double *data1, double *data2, double *data3, const int len, const double sampling_frequency, const double target_frequency);
00013     ~DataToFFT();
00014 
00015     double getPhase(int adc_number);
00016     double getMagnitude(int adc_number);
00017     int    getTargetBin();
00018 
00019     void Reset();
00020   private:
00021     double        *p_data1;
00022     double        *p_data2;
00023     double        *p_data3;
00024     const int     m_fft_length;
00025     const double  m_sampling_frequency;
00026     const double  m_target_frequency;
00027     const int     m_target_bin;
00028     fftw_plan     m_fft_plan1;
00029     fftw_plan     m_fft_plan2;
00030     fftw_plan     m_fft_plan3;
00031     fftw_complex  *p_fft1_output;
00032     fftw_complex  *p_fft2_output;
00033     fftw_complex  *p_fft3_output;
00034     double        *p_adc1_bin_magnitude;
00035     double        *p_adc2_bin_magnitude;
00036     double        *p_adc3_bin_magnitude;
00037     double        *p_adc1_bin_phase;
00038     double        *p_adc2_bin_phase;
00039     double        *p_adc3_bin_phase;
00040 };
00041 
00042 } // End namespace SeaBee3_sonar
00043 
00044 #endif // SEABEE3_SONAR_FFT_H Defined