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

MySpectrogram/AnalysisBase.hpp@6:b3885567877c, 2017-04-10 (annotated)

Committer:
MikamiUitOpen
Date:
Mon Apr 10 13:43:07 2017 +0000
Revision:
6:b3885567877c
Parent:
3:6a2c8ff46f73 
7

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:9470a174c910 1 //-------------------------------------------------------
MikamiUitOpen 2:1f092ac020e1 2 // Base abstract class for spectrum analysis (Header)
MikamiUitOpen 0:9470a174c910 3 //
MikamiUitOpen 6:b3885567877c 4 // 2017/03/30, Copyright (c) 2017 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