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.cpp
- Revision:
- 3:6a2c8ff46f73
- Parent:
- 2:1f092ac020e1
- Child:
- 6:b3885567877c
--- /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);
+ }
+}