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.cpp@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
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 #include "AnalysisBase.hpp"
MikamiUitOpen 0:9470a174c910 8
MikamiUitOpen 0:9470a174c910 9 namespace Mikami
MikamiUitOpen 0:9470a174c910 10 {
MikamiUitOpen 0:9470a174c910 11 AnalyzerBase::AnalyzerBase(int nData, int nFft, int nUse)
MikamiUitOpen 0:9470a174c910 12 : N_DATA_(nData), N_FFT_(nFft),
MikamiUitOpen 0:9470a174c910 13 fft_(nFft), wHm_(nData-1, nUse),
MikamiUitOpen 2:1f092ac020e1 14 xData_(nUse), wData_(nUse) {}
MikamiUitOpen 0:9470a174c910 15
MikamiUitOpen 0:9470a174c910 16 void AnalyzerBase::Execute(const float xn[], float db[])
MikamiUitOpen 0:9470a174c910 17 {
MikamiUitOpen 0:9470a174c910 18 // Differencing
MikamiUitOpen 0:9470a174c910 19 for (int n=0; n<N_DATA_-1; n++)
MikamiUitOpen 0:9470a174c910 20 xData_[n] = xn[n+1] - 0.8f*xn[n];
MikamiUitOpen 0:9470a174c910 21
MikamiUitOpen 2:1f092ac020e1 22 // Windowing
MikamiUitOpen 0:9470a174c910 23 wHm_.Execute(xData_, wData_);
MikamiUitOpen 6:b3885567877c 24
MikamiUitOpen 0:9470a174c910 25 Analyze(wData_, db);
MikamiUitOpen 0:9470a174c910 26 }
MikamiUitOpen 0:9470a174c910 27 }