不韋 呂
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: MySpectrogram/AnalysisBase.hpp
- Revision:
- 3:6a2c8ff46f73
- Parent:
- 2:1f092ac020e1
- Child:
- 6:b3885567877c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/MySpectrogram/AnalysisBase.hpp Mon Aug 15 06:51:01 2016 +0000
@@ -0,0 +1,50 @@
+//-------------------------------------------------------
+// Base abstract class for spectrum analysis (Header)
+//
+// 2016/07/23, Copyright (c) 2016 MIKAMI, Naoki
+//-------------------------------------------------------
+
+#ifndef BASE_ANALYZER_HPP
+#define BASE_ANALYZER_HPP
+
+#include "Array.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_;
+
+ Array<float> xData_; // data to be analyzed
+ Array<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
+