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@18:6630d61aeb3c, 2016-02-22 (annotated)
- Committer:
- MikamiUitOpen
- Date:
- Mon Feb 22 13:54:51 2016 +0000
- Revision:
- 18:6630d61aeb3c
- Parent:
- 9:99c55850cb41
19
Who changed what in which revision?
User | Revision | Line number | New 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 | 9:99c55850cb41 | 5 | // 2015/12/29, 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 | 6:b27ef8d98edc | 18 | public: |
MikamiUitOpen | 9:99c55850cb41 | 19 | Selector(SpectrumDisplay& disp, |
MikamiUitOpen | 9:99c55850cb41 | 20 | int nData, int nFft, int order, int nLifter) |
MikamiUitOpen | 9:99c55850cb41 | 21 | : disp_(disp), N_DATA_(nData), |
MikamiUitOpen | 6:b27ef8d98edc | 22 | sn_f_(new float[nData]), dbData_(new float[nFft/2+1]) |
MikamiUitOpen | 6:b27ef8d98edc | 23 | { |
MikamiUitOpen | 6:b27ef8d98edc | 24 | obj_[0] = new FftAnalyzer(nData, nFft); |
MikamiUitOpen | 6:b27ef8d98edc | 25 | obj_[1] = new LpcAnalyzer(nData, nFft, order); |
MikamiUitOpen | 6:b27ef8d98edc | 26 | obj_[2] = new CepstrumAnalyzer(nData, nFft, nLifter); |
MikamiUitOpen | 6:b27ef8d98edc | 27 | } |
MikamiUitOpen | 6:b27ef8d98edc | 28 | |
MikamiUitOpen | 6:b27ef8d98edc | 29 | ~Selector() |
MikamiUitOpen | 6:b27ef8d98edc | 30 | { |
MikamiUitOpen | 6:b27ef8d98edc | 31 | delete[] sn_f_; |
MikamiUitOpen | 6:b27ef8d98edc | 32 | delete[] dbData_; |
MikamiUitOpen | 6:b27ef8d98edc | 33 | for (int n=0; n<3; n++) delete obj_[n]; |
MikamiUitOpen | 6:b27ef8d98edc | 34 | } |
MikamiUitOpen | 6:b27ef8d98edc | 35 | |
MikamiUitOpen | 9:99c55850cb41 | 36 | void Execute(const int16_t sn[], int touchedNum) |
MikamiUitOpen | 6:b27ef8d98edc | 37 | { |
MikamiUitOpen | 6:b27ef8d98edc | 38 | if (touchedNum >=0) |
MikamiUitOpen | 6:b27ef8d98edc | 39 | { |
MikamiUitOpen | 6:b27ef8d98edc | 40 | for (int n=0; n<N_DATA_; n++) sn_f_[n] = sn[n]; |
MikamiUitOpen | 6:b27ef8d98edc | 41 | obj_[touchedNum]->Execute(sn_f_, dbData_); |
MikamiUitOpen | 6:b27ef8d98edc | 42 | disp_.Draw(dbData_); |
MikamiUitOpen | 6:b27ef8d98edc | 43 | } |
MikamiUitOpen | 6:b27ef8d98edc | 44 | } |
MikamiUitOpen | 6:b27ef8d98edc | 45 | |
MikamiUitOpen | 0:5c237fdcba23 | 46 | private: |
MikamiUitOpen | 0:5c237fdcba23 | 47 | SpectrumDisplay& disp_; |
MikamiUitOpen | 0:5c237fdcba23 | 48 | AnalyzerBase* obj_[3]; |
MikamiUitOpen | 0:5c237fdcba23 | 49 | |
MikamiUitOpen | 0:5c237fdcba23 | 50 | const int N_DATA_; |
MikamiUitOpen | 0:5c237fdcba23 | 51 | |
MikamiUitOpen | 0:5c237fdcba23 | 52 | float* sn_f_; |
MikamiUitOpen | 0:5c237fdcba23 | 53 | float* dbData_; |
MikamiUitOpen | 0:5c237fdcba23 | 54 | |
MikamiUitOpen | 4:99d4d5ea06a2 | 55 | // disallow copy constructor and assignment operator |
MikamiUitOpen | 4:99d4d5ea06a2 | 56 | Selector(const Selector& ); |
MikamiUitOpen | 4:99d4d5ea06a2 | 57 | Selector& operator=(const Selector& ); |
MikamiUitOpen | 0:5c237fdcba23 | 58 | }; |
MikamiUitOpen | 0:5c237fdcba23 | 59 | } |