不韋 呂 / Window

HanningWindow, HammingWindow, BlackmanWindow の各クラス． このライブラリを登録した際のプログラム： Demo_Window

Dependents:   TrG_FFT_Analyzer Demo_Window TrG_Spectrogram

Hanning.hpp@0:823e9a4ab223, 2021-05-23 (annotated)

Committer:
MikamiUitOpen
Date:
Sun May 23 06:25:26 2021 +0000
Revision:
0:823e9a4ab223
Child:
1:d8673bf6f89c
1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:823e9a4ab223 1 //-------------------------------------------------------------------
MikamiUitOpen 0:823e9a4ab223 2 // Hanning 窓による窓掛け
MikamiUitOpen 0:823e9a4ab223 3 // ゼロ詰め（zero-padding）の機能を持つ
MikamiUitOpen 0:823e9a4ab223 4 //
MikamiUitOpen 0:823e9a4ab223 5 // 2021/05/22, Copyright (c) 2021 MIKAMI, Naoki
MikamiUitOpen 0:823e9a4ab223 6 //-------------------------------------------------------------------
MikamiUitOpen 0:823e9a4ab223 7
MikamiUitOpen 0:823e9a4ab223 8 #ifndef HANNING_WINDOW_HPP
MikamiUitOpen 0:823e9a4ab223 9 #define HANNING_WINDOW_HPP
MikamiUitOpen 0:823e9a4ab223 10
MikamiUitOpen 0:823e9a4ab223 11 #include "WindowBase.hpp"
MikamiUitOpen 0:823e9a4ab223 12
MikamiUitOpen 0:823e9a4ab223 13 namespace Mikami
MikamiUitOpen 0:823e9a4ab223 14 {
MikamiUitOpen 0:823e9a4ab223 15 class HanningWindow : public WindowBase
MikamiUitOpen 0:823e9a4ab223 16 {
MikamiUitOpen 0:823e9a4ab223 17 public:
MikamiUitOpen 0:823e9a4ab223 18 // コンストラクタ
MikamiUitOpen 0:823e9a4ab223 19 HanningWindow(uint16_t nFft, uint16_t nData)
MikamiUitOpen 0:823e9a4ab223 20 : WindowBase(nFft, nData) { Generate(nData); }
MikamiUitOpen 0:823e9a4ab223 21 HanningWindow(uint16_t nFft)
MikamiUitOpen 0:823e9a4ab223 22 : WindowBase(nFft, nFft) { Generate(nFft); }
MikamiUitOpen 0:823e9a4ab223 23
MikamiUitOpen 0:823e9a4ab223 24 private:
MikamiUitOpen 0:823e9a4ab223 25 // 窓関数を生成
MikamiUitOpen 0:823e9a4ab223 26 virtual void Generate(uint16_t nData)
MikamiUitOpen 0:823e9a4ab223 27 {
MikamiUitOpen 0:823e9a4ab223 28 const float PI2L = 6.283185f/(float)nData;
MikamiUitOpen 0:823e9a4ab223 29 for (int k=0; k<nData; k++)
MikamiUitOpen 0:823e9a4ab223 30 Set(k, 0.5f - 0.5f*cosf(k*PI2L));
MikamiUitOpen 0:823e9a4ab223 31 }
MikamiUitOpen 0:823e9a4ab223 32
MikamiUitOpen 0:823e9a4ab223 33 // コピー･コンストラクタおよび代入演算子の禁止のため
MikamiUitOpen 0:823e9a4ab223 34 HanningWindow(const HanningWindow& );
MikamiUitOpen 0:823e9a4ab223 35 HanningWindow& operator=(const HanningWindow& );
MikamiUitOpen 0:823e9a4ab223 36 };
MikamiUitOpen 0:823e9a4ab223 37 }
MikamiUitOpen 0:823e9a4ab223 38 #endif // HANNING_WINDOW_HPP