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
Diff: MyClasses_Functions/AnalysisBase.hpp
- Revision:
- 0:9470a174c910
- Child:
- 2:1f092ac020e1
diff -r 000000000000 -r 9470a174c910 MyClasses_Functions/AnalysisBase.hpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/MyClasses_Functions/AnalysisBase.hpp Sun May 22 06:28:40 2016 +0000 @@ -0,0 +1,49 @@ +//------------------------------------------------------- +// Base class for spectrum analysis (Header) +// +// 2015/12/15, Copyright (c) 2015 MIKAMI, Naoki +//------------------------------------------------------- + +#ifndef BASE_ANALYZER_HPP +#define BASE_ANALYZER_HPP + +#include "fftReal.hpp" +#include "Hamming.hpp" + +namespace Mikami +{ + class AnalyzerBase + { + public: + // nData: Number of data to be analyzed + // nFft: Number of FFT points + // nUse: FFT, cepstrum: window width + zero padding + // Linear prediction: window width + AnalyzerBase(int nData, int nFft, int nUse); + virtual ~AnalyzerBase(); + void Execute(const float xn[], float db[]); + + protected: + const int N_DATA_; + const int N_FFT_; + + FftReal fft_; + + float Norm(Complex x) + { return x.real()*x.real() + x.imag()*x.imag(); } + + private: + HammingWindow wHm_; + + float* xData_; // data to be analyzed + float* wData_; // windowd data + + virtual void Analyze(const float wData[], float db[]) = 0; + + // disallow copy constructor and assignment operator + AnalyzerBase(const AnalyzerBase& ); + AnalyzerBase& operator=(const AnalyzerBase& ); + }; +} +#endif // BASE_ANALYZER_HPP +