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: MyClasses_Functions/AnalysisBase.cpp
- Revision:
- 0:9470a174c910
- Child:
- 2:1f092ac020e1
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/MyClasses_Functions/AnalysisBase.cpp Sun May 22 06:28:40 2016 +0000
@@ -0,0 +1,34 @@
+//-------------------------------------------------------
+// Base class for spectrum analysis
+//
+// 2016/05/14, Copyright (c) 2015 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_(new float[nUse]), wData_(new float[nUse]) {}
+
+ AnalyzerBase::~AnalyzerBase()
+ {
+ delete[] xData_;
+ }
+
+ 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 (FFT, cepstrum: + zero-padding)
+ wHm_.Execute(xData_, wData_);
+
+ // Pure virtual function for analyzing
+ Analyze(wData_, db);
+ }
+}
+