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?
User | Revision | Line number | New contents of line |
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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 |