不韋 呂 / Mbed 2 deprecated F746_RealtimeSpectrumAnalyzer

Realtime spectrum analyzer. Using FFT, linear prediction, or cepstrum smoothing. Version using MEMS microphone and CODEC, named "F746_RealtimeSpectrumAnalyzer_MEMS_Mic" is registered. リアルタイム スペクトル解析器．解析の手法：FFT，線形予測法，ケプストラムによる平滑化の３種類．このプログラムの説明は，CQ出版社のインターフェース誌，2016年4月号に掲載．外付けのマイクまたは他の信号源等を A0 に接続する．線形予測法，ケプストラムは，スペクトル解析の対象を音声信号に想定してパラメータを設定している．MEMS マイクと CODEC を使ったバージョンを "F746_RealtimeSpectrumAnalyzer_MEMS_Mic" として登録．

Dependencies:   BSP_DISCO_F746NG BUTTON_GROUP LCD_DISCO_F746NG TS_DISCO_F746NG UIT_FFT_Real mbed

MyClasses/AnalysisSelector.hpp@0:5c237fdcba23, 2015-12-09 (annotated)

Committer:
MikamiUitOpen
Date:
Wed Dec 09 05:05:00 2015 +0000
Revision:
0:5c237fdcba23
Child:
4:99d4d5ea06a2
1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:5c237fdcba23 1 //-------------------------------------------------------
MikamiUitOpen 0:5c237fdcba23 2 // Class for selecting spectrum analysis method and
MikamiUitOpen 0:5c237fdcba23 3 // displaying
MikamiUitOpen 0:5c237fdcba23 4 //
MikamiUitOpen 0:5c237fdcba23 5 // 2015/12/09, Copyright (c) 2015 MIKAMI, Naoki
MikamiUitOpen 0:5c237fdcba23 6 //-------------------------------------------------------
MikamiUitOpen 0:5c237fdcba23 7
MikamiUitOpen 0:5c237fdcba23 8 #include "SpectrumDisplay.hpp"
MikamiUitOpen 0:5c237fdcba23 9 #include "FFT_Analysis.hpp"
MikamiUitOpen 0:5c237fdcba23 10 #include "LPC_Analysis.hpp"
MikamiUitOpen 0:5c237fdcba23 11 #include "CepstrumAnalysis.hpp"
MikamiUitOpen 0:5c237fdcba23 12 using namespace Mikami;
MikamiUitOpen 0:5c237fdcba23 13
MikamiUitOpen 0:5c237fdcba23 14 namespace Mikami
MikamiUitOpen 0:5c237fdcba23 15 {
MikamiUitOpen 0:5c237fdcba23 16 class Selector
MikamiUitOpen 0:5c237fdcba23 17 {
MikamiUitOpen 0:5c237fdcba23 18 private:
MikamiUitOpen 0:5c237fdcba23 19 SpectrumDisplay& disp_;
MikamiUitOpen 0:5c237fdcba23 20 ButtonGroup& method_;
MikamiUitOpen 0:5c237fdcba23 21 AnalyzerBase* obj_[3];
MikamiUitOpen 0:5c237fdcba23 22
MikamiUitOpen 0:5c237fdcba23 23 const int N_DATA_;
MikamiUitOpen 0:5c237fdcba23 24 const uint32_t TOUCHED_COLOR_;
MikamiUitOpen 0:5c237fdcba23 25
MikamiUitOpen 0:5c237fdcba23 26 float* sn_f_;
MikamiUitOpen 0:5c237fdcba23 27 float* dbData_;
MikamiUitOpen 0:5c237fdcba23 28
MikamiUitOpen 0:5c237fdcba23 29 public:
MikamiUitOpen 0:5c237fdcba23 30 Selector(SpectrumDisplay& disp, ButtonGroup& method,
MikamiUitOpen 0:5c237fdcba23 31 int nData, int nFft, int order, int nLifter,
MikamiUitOpen 0:5c237fdcba23 32 uint32_t touchedColor)
MikamiUitOpen 0:5c237fdcba23 33 : disp_(disp), method_(method), N_DATA_(nData),
MikamiUitOpen 0:5c237fdcba23 34 TOUCHED_COLOR_(touchedColor),
MikamiUitOpen 0:5c237fdcba23 35 sn_f_(new float[nData]), dbData_(new float[nFft/2+1])
MikamiUitOpen 0:5c237fdcba23 36 {
MikamiUitOpen 0:5c237fdcba23 37 obj_[0] = new FftAnalyzer(nData, nFft);
MikamiUitOpen 0:5c237fdcba23 38 obj_[1] = new LpcAnalyzer(nData, nFft, order);
MikamiUitOpen 0:5c237fdcba23 39 obj_[2] = new CepstrumAnalyzer(nData, nFft, nLifter);
MikamiUitOpen 0:5c237fdcba23 40 }
MikamiUitOpen 0:5c237fdcba23 41
MikamiUitOpen 0:5c237fdcba23 42 ~Selector()
MikamiUitOpen 0:5c237fdcba23 43 {
MikamiUitOpen 0:5c237fdcba23 44 delete[] sn_f_;
MikamiUitOpen 0:5c237fdcba23 45 delete[] dbData_;
MikamiUitOpen 0:5c237fdcba23 46 for (int n=0; n<3; n++) delete obj_[n];
MikamiUitOpen 0:5c237fdcba23 47 }
MikamiUitOpen 0:5c237fdcba23 48
MikamiUitOpen 0:5c237fdcba23 49 void Execute(const int16_t sn[], int& touchedNum)
MikamiUitOpen 0:5c237fdcba23 50 {
MikamiUitOpen 0:5c237fdcba23 51 method_.GetTouchedNumber(touchedNum, TOUCHED_COLOR_);
MikamiUitOpen 0:5c237fdcba23 52 if (touchedNum >=0)
MikamiUitOpen 0:5c237fdcba23 53 {
MikamiUitOpen 0:5c237fdcba23 54 for (int n=0; n<N_DATA_; n++) sn_f_[n] = sn[n];
MikamiUitOpen 0:5c237fdcba23 55 obj_[touchedNum]->Execute(sn_f_, dbData_);
MikamiUitOpen 0:5c237fdcba23 56 disp_.Draw(dbData_);
MikamiUitOpen 0:5c237fdcba23 57 }
MikamiUitOpen 0:5c237fdcba23 58 }
MikamiUitOpen 0:5c237fdcba23 59 };
MikamiUitOpen 0:5c237fdcba23 60 }