不韋 呂 / F746_Spectrogram

Realtime spectrogram for DISCO-F746NG. On-board MEMS microphone is used for input sound signal. リアルタイムスペクトログラム．入力：MEMSマイク

Dependencies:   F746_GUI F746_SAI_IO UIT_FFT_Real

MyClasses_Functions/AnalysisBase.hpp@0:9470a174c910, 2016-05-22 (annotated)

Committer:
MikamiUitOpen
Date:
Sun May 22 06:28:40 2016 +0000
Revision:
0:9470a174c910
Child:
2:1f092ac020e1
1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:9470a174c910 1 //-------------------------------------------------------
MikamiUitOpen 0:9470a174c910 2 // Base class for spectrum analysis (Header)
MikamiUitOpen 0:9470a174c910 3 //
MikamiUitOpen 0:9470a174c910 4 // 2015/12/15, Copyright (c) 2015 MIKAMI, Naoki
MikamiUitOpen 0:9470a174c910 5 //-------------------------------------------------------
MikamiUitOpen 0:9470a174c910 6
MikamiUitOpen 0:9470a174c910 7 #ifndef BASE_ANALYZER_HPP
MikamiUitOpen 0:9470a174c910 8 #define BASE_ANALYZER_HPP
MikamiUitOpen 0:9470a174c910 9
MikamiUitOpen 0:9470a174c910 10 #include "fftReal.hpp"
MikamiUitOpen 0:9470a174c910 11 #include "Hamming.hpp"
MikamiUitOpen 0:9470a174c910 12
MikamiUitOpen 0:9470a174c910 13 namespace Mikami
MikamiUitOpen 0:9470a174c910 14 {
MikamiUitOpen 0:9470a174c910 15 class AnalyzerBase
MikamiUitOpen 0:9470a174c910 16 {
MikamiUitOpen 0:9470a174c910 17 public:
MikamiUitOpen 0:9470a174c910 18 // nData: Number of data to be analyzed
MikamiUitOpen 0:9470a174c910 19 // nFft: Number of FFT points
MikamiUitOpen 0:9470a174c910 20 // nUse: FFT, cepstrum: window width + zero padding
MikamiUitOpen 0:9470a174c910 21 // Linear prediction: window width
MikamiUitOpen 0:9470a174c910 22 AnalyzerBase(int nData, int nFft, int nUse);
MikamiUitOpen 0:9470a174c910 23 virtual ~AnalyzerBase();
MikamiUitOpen 0:9470a174c910 24 void Execute(const float xn[], float db[]);
MikamiUitOpen 0:9470a174c910 25
MikamiUitOpen 0:9470a174c910 26 protected:
MikamiUitOpen 0:9470a174c910 27 const int N_DATA_;
MikamiUitOpen 0:9470a174c910 28 const int N_FFT_;
MikamiUitOpen 0:9470a174c910 29
MikamiUitOpen 0:9470a174c910 30 FftReal fft_;
MikamiUitOpen 0:9470a174c910 31
MikamiUitOpen 0:9470a174c910 32 float Norm(Complex x)
MikamiUitOpen 0:9470a174c910 33 { return x.real()*x.real() + x.imag()*x.imag(); }
MikamiUitOpen 0:9470a174c910 34
MikamiUitOpen 0:9470a174c910 35 private:
MikamiUitOpen 0:9470a174c910 36 HammingWindow wHm_;
MikamiUitOpen 0:9470a174c910 37
MikamiUitOpen 0:9470a174c910 38 float* xData_; // data to be analyzed
MikamiUitOpen 0:9470a174c910 39 float* wData_; // windowd data
MikamiUitOpen 0:9470a174c910 40
MikamiUitOpen 0:9470a174c910 41 virtual void Analyze(const float wData[], float db[]) = 0;
MikamiUitOpen 0:9470a174c910 42
MikamiUitOpen 0:9470a174c910 43 // disallow copy constructor and assignment operator
MikamiUitOpen 0:9470a174c910 44 AnalyzerBase(const AnalyzerBase& );
MikamiUitOpen 0:9470a174c910 45 AnalyzerBase& operator=(const AnalyzerBase& );
MikamiUitOpen 0:9470a174c910 46 };
MikamiUitOpen 0:9470a174c910 47 }
MikamiUitOpen 0:9470a174c910 48 #endif // BASE_ANALYZER_HPP
MikamiUitOpen 0:9470a174c910 49