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.cpp
- Revision:
- 3:6a2c8ff46f73
- Parent:
- 2:1f092ac020e1
- Child:
- 6:b3885567877c
diff -r 1f092ac020e1 -r 6a2c8ff46f73 MySpectrogram/AnalysisBase.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/MySpectrogram/AnalysisBase.cpp Mon Aug 15 06:51:01 2016 +0000 @@ -0,0 +1,27 @@ +//------------------------------------------------------- +// Base abstract class for spectrum analysis +// +// 2016/07/23, Copyright (c) 2016 MIKAMI, Naoki +//------------------------------------------------------- + +#include "AnalysisBase.hpp" + +namespace Mikami +{ + AnalyzerBase::AnalyzerBase(int nData, int nFft, int nUse) + : N_DATA_(nData), N_FFT_(nFft), + fft_(nFft), wHm_(nData-1, nUse), + xData_(nUse), wData_(nUse) {} + + void AnalyzerBase::Execute(const float xn[], float db[]) + { + // Differencing + for (int n=0; n<N_DATA_-1; n++) + xData_[n] = xn[n+1] - 0.8f*xn[n]; + + // Windowing + wHm_.Execute(xData_, wData_); + + Analyze(wData_, db); + } +}