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
Diff: MyClasses/AnalysisSelector.hpp
- Revision:
- 6:b27ef8d98edc
- Parent:
- 4:99d4d5ea06a2
- Child:
- 9:99c55850cb41
--- a/MyClasses/AnalysisSelector.hpp Tue Dec 15 13:27:07 2015 +0000 +++ b/MyClasses/AnalysisSelector.hpp Fri Dec 18 10:09:31 2015 +0000 @@ -2,7 +2,7 @@ // Class for selecting spectrum analysis method and // displaying // -// 2015/12/15, Copyright (c) 2015 MIKAMI, Naoki +// 2015/12/18, Copyright (c) 2015 MIKAMI, Naoki //------------------------------------------------------- #include "SpectrumDisplay.hpp" @@ -15,6 +15,37 @@ { class Selector { + public: + Selector(SpectrumDisplay& disp, ButtonGroup& method, + int nData, int nFft, int order, int nLifter, + uint32_t touchedColor) + : disp_(disp), method_(method), N_DATA_(nData), + TOUCHED_COLOR_(touchedColor), + sn_f_(new float[nData]), dbData_(new float[nFft/2+1]) + { + obj_[0] = new FftAnalyzer(nData, nFft); + obj_[1] = new LpcAnalyzer(nData, nFft, order); + obj_[2] = new CepstrumAnalyzer(nData, nFft, nLifter); + } + + ~Selector() + { + delete[] sn_f_; + delete[] dbData_; + for (int n=0; n<3; n++) delete obj_[n]; + } + + void Execute(const int16_t sn[], int& touchedNum) + { + method_.GetTouchedNumber(touchedNum, TOUCHED_COLOR_); + if (touchedNum >=0) + { + for (int n=0; n<N_DATA_; n++) sn_f_[n] = sn[n]; + obj_[touchedNum]->Execute(sn_f_, dbData_); + disp_.Draw(dbData_); + } + } + private: SpectrumDisplay& disp_; ButtonGroup& method_; @@ -29,36 +60,5 @@ // disallow copy constructor and assignment operator Selector(const Selector& ); Selector& operator=(const Selector& ); - - public: - Selector(SpectrumDisplay& disp, ButtonGroup& method, - int nData, int nFft, int order, int nLifter, - uint32_t touchedColor) - : disp_(disp), method_(method), N_DATA_(nData), - TOUCHED_COLOR_(touchedColor), - sn_f_(new float[nData]), dbData_(new float[nFft/2+1]) - { - obj_[0] = new FftAnalyzer(nData, nFft); - obj_[1] = new LpcAnalyzer(nData, nFft, order); - obj_[2] = new CepstrumAnalyzer(nData, nFft, nLifter); - } - - ~Selector() - { - delete[] sn_f_; - delete[] dbData_; - for (int n=0; n<3; n++) delete obj_[n]; - } - - void Execute(const int16_t sn[], int& touchedNum) - { - method_.GetTouchedNumber(touchedNum, TOUCHED_COLOR_); - if (touchedNum >=0) - { - for (int n=0; n<N_DATA_; n++) sn_f_[n] = sn[n]; - obj_[touchedNum]->Execute(sn_f_, dbData_); - disp_.Draw(dbData_); - } - } }; }