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@2:1f092ac020e1, 2016-07-23 (annotated)
- Committer:
- MikamiUitOpen
- Date:
- Sat Jul 23 13:34:54 2016 +0000
- Revision:
- 2:1f092ac020e1
- Parent:
- 0:9470a174c910
3
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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MikamiUitOpen | 0:9470a174c910 | 1 | //------------------------------------------------------- |
MikamiUitOpen | 2:1f092ac020e1 | 2 | // Base abstract class for spectrum analysis (Header) |
MikamiUitOpen | 0:9470a174c910 | 3 | // |
MikamiUitOpen | 2:1f092ac020e1 | 4 | // 2016/07/23, Copyright (c) 2016 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 | 2:1f092ac020e1 | 10 | #include "Array.hpp" |
MikamiUitOpen | 0:9470a174c910 | 11 | #include "fftReal.hpp" |
MikamiUitOpen | 0:9470a174c910 | 12 | #include "Hamming.hpp" |
MikamiUitOpen | 0:9470a174c910 | 13 | |
MikamiUitOpen | 0:9470a174c910 | 14 | namespace Mikami |
MikamiUitOpen | 0:9470a174c910 | 15 | { |
MikamiUitOpen | 0:9470a174c910 | 16 | class AnalyzerBase |
MikamiUitOpen | 0:9470a174c910 | 17 | { |
MikamiUitOpen | 0:9470a174c910 | 18 | public: |
MikamiUitOpen | 0:9470a174c910 | 19 | // nData: Number of data to be analyzed |
MikamiUitOpen | 0:9470a174c910 | 20 | // nFft: Number of FFT points |
MikamiUitOpen | 0:9470a174c910 | 21 | // nUse: FFT, cepstrum: window width + zero padding |
MikamiUitOpen | 0:9470a174c910 | 22 | // Linear prediction: window width |
MikamiUitOpen | 0:9470a174c910 | 23 | AnalyzerBase(int nData, int nFft, int nUse); |
MikamiUitOpen | 2:1f092ac020e1 | 24 | virtual ~AnalyzerBase() {} |
MikamiUitOpen | 0:9470a174c910 | 25 | void Execute(const float xn[], float db[]); |
MikamiUitOpen | 0:9470a174c910 | 26 | |
MikamiUitOpen | 0:9470a174c910 | 27 | protected: |
MikamiUitOpen | 0:9470a174c910 | 28 | const int N_DATA_; |
MikamiUitOpen | 0:9470a174c910 | 29 | const int N_FFT_; |
MikamiUitOpen | 0:9470a174c910 | 30 | |
MikamiUitOpen | 0:9470a174c910 | 31 | FftReal fft_; |
MikamiUitOpen | 0:9470a174c910 | 32 | |
MikamiUitOpen | 0:9470a174c910 | 33 | float Norm(Complex x) |
MikamiUitOpen | 0:9470a174c910 | 34 | { return x.real()*x.real() + x.imag()*x.imag(); } |
MikamiUitOpen | 0:9470a174c910 | 35 | |
MikamiUitOpen | 0:9470a174c910 | 36 | private: |
MikamiUitOpen | 0:9470a174c910 | 37 | HammingWindow wHm_; |
MikamiUitOpen | 0:9470a174c910 | 38 | |
MikamiUitOpen | 2:1f092ac020e1 | 39 | Array<float> xData_; // data to be analyzed |
MikamiUitOpen | 2:1f092ac020e1 | 40 | Array<float> wData_; // windowd data |
MikamiUitOpen | 0:9470a174c910 | 41 | |
MikamiUitOpen | 0:9470a174c910 | 42 | virtual void Analyze(const float wData[], float db[]) = 0; |
MikamiUitOpen | 0:9470a174c910 | 43 | |
MikamiUitOpen | 0:9470a174c910 | 44 | // disallow copy constructor and assignment operator |
MikamiUitOpen | 0:9470a174c910 | 45 | AnalyzerBase(const AnalyzerBase& ); |
MikamiUitOpen | 0:9470a174c910 | 46 | AnalyzerBase& operator=(const AnalyzerBase& ); |
MikamiUitOpen | 0:9470a174c910 | 47 | }; |
MikamiUitOpen | 0:9470a174c910 | 48 | } |
MikamiUitOpen | 0:9470a174c910 | 49 | #endif // BASE_ANALYZER_HPP |
MikamiUitOpen | 0:9470a174c910 | 50 |