不韋 呂 / Mbed 2 deprecated F746_SD_WavPlayer

Output the audio signal with filtering by IIR filter in the *.wav file on the SD card using onboard CODEC. SD カードの *.wav ファイルのオーディオ信号を遮断周波数可変の IIR フィルタを通して，ボードに搭載されているCODEC で出力する．

Dependencies:   BSP_DISCO_F746NG F746_GUI LCD_DISCO_F746NG SDFileSystem_Warning_Fixed TS_DISCO_F746NG mbed FrequencyResponseDrawer F746_SAI_IO Array_Matrix

MyClasses_Functions/DesignerDrawer.cpp@2:2478e7a8e8d5, 2016-04-25 (annotated)

Committer:
MikamiUitOpen
Date:
Mon Apr 25 00:49:09 2016 +0000
Revision:
2:2478e7a8e8d5
Parent:
0:04b43b777fae
Child:
3:cda40218256c
3

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:04b43b777fae 1 //------------------------------------------------------------------------------
MikamiUitOpen 0:04b43b777fae 2 // IIR フィルタを双一次 z 変換で設計し，その周波数特性を描画するためのクラス
MikamiUitOpen 0:04b43b777fae 3 //
MikamiUitOpen 2:2478e7a8e8d5 4 // 2016/04/25, Copyright (c) 2016 MIKAMI, Naoki
MikamiUitOpen 0:04b43b777fae 5 //------------------------------------------------------------------------------
MikamiUitOpen 0:04b43b777fae 6
MikamiUitOpen 0:04b43b777fae 7 #include "DesignerDrawer.hpp"
MikamiUitOpen 0:04b43b777fae 8
MikamiUitOpen 0:04b43b777fae 9 namespace Mikami
MikamiUitOpen 0:04b43b777fae 10 {
MikamiUitOpen 0:04b43b777fae 11 // Constructor
MikamiUitOpen 0:04b43b777fae 12 DesignerDrawer::DesignerDrawer(uint16_t x0, uint16_t y0,
MikamiUitOpen 2:2478e7a8e8d5 13 uint16_t db1, int fs, int order,
MikamiUitOpen 0:04b43b777fae 14 float fc, uint16_t fL, uint16_t fH,
MikamiUitOpen 0:04b43b777fae 15 BilinearDesign::Type lpHp)
MikamiUitOpen 0:04b43b777fae 16 : lcd_(GuiBase::GetLcdPtr()), ts_(GuiBase::GetTsPtr()),
MikamiUitOpen 2:2478e7a8e8d5 17 X0_(x0), Y0_(y0), DB1_(db1), ORDER_(order),
MikamiUitOpen 2:2478e7a8e8d5 18 CURSOR_Y0_(y0+1-db1*60), CURSOR_LENGTH_(db1*60-1),
MikamiUitOpen 0:04b43b777fae 19 LOWER_F_(fL), HIGHER_F_(fH),
MikamiUitOpen 0:04b43b777fae 20 CURSOR_COLOR_(0xFFE000D0), CURSOR_TOUCHED_COLOR_(0xFFFF80FF)
MikamiUitOpen 0:04b43b777fae 21 {
MikamiUitOpen 0:04b43b777fae 22 drawerObj_ = new FrqRespDrawer(x0, 100.0f, 20000.0f, 140,
MikamiUitOpen 2:2478e7a8e8d5 23 y0, -60, 0, db1, 10, fs);
MikamiUitOpen 0:04b43b777fae 24
MikamiUitOpen 0:04b43b777fae 25 // 双一次 z 変換による IIR フィルタの設計
MikamiUitOpen 0:04b43b777fae 26 designObj_ = new BilinearDesign(order, fs);
MikamiUitOpen 0:04b43b777fae 27 coefs_ = new BilinearDesign::Coefs[order/2];
MikamiUitOpen 0:04b43b777fae 28 ck_ = (Biquad::Coefs *)coefs_;
MikamiUitOpen 0:04b43b777fae 29
MikamiUitOpen 0:04b43b777fae 30 fC_ = fc; // 最初に与える遮断周波数
MikamiUitOpen 0:04b43b777fae 31 designObj_->Execute(fC_, lpHp, coefs_, g0_);
MikamiUitOpen 0:04b43b777fae 32 frqResp_.SetParams(ORDER_, g0_, ck_);
MikamiUitOpen 0:04b43b777fae 33
MikamiUitOpen 0:04b43b777fae 34 // 周波数特性の描画
MikamiUitOpen 0:04b43b777fae 35 lblFrq_ = new NumericLabel<int>(110, 30);
MikamiUitOpen 0:04b43b777fae 36 DrawResponse();
MikamiUitOpen 0:04b43b777fae 37 tp_ = new TouchPanelDetectorX(
MikamiUitOpen 0:04b43b777fae 38 drawerObj_->X(LOWER_F_), drawerObj_->X(HIGHER_F_),
MikamiUitOpen 0:04b43b777fae 39 CURSOR_Y0_, y0);
MikamiUitOpen 0:04b43b777fae 40 lp_ = lpHp;
MikamiUitOpen 0:04b43b777fae 41 cursorRedraw_ = false;
MikamiUitOpen 0:04b43b777fae 42 }
MikamiUitOpen 0:04b43b777fae 43
MikamiUitOpen 0:04b43b777fae 44 DesignerDrawer::~DesignerDrawer()
MikamiUitOpen 0:04b43b777fae 45 {
MikamiUitOpen 0:04b43b777fae 46 delete tp_;
MikamiUitOpen 0:04b43b777fae 47 delete lblFrq_;
MikamiUitOpen 0:04b43b777fae 48 delete coefs_;
MikamiUitOpen 0:04b43b777fae 49 delete designObj_;
MikamiUitOpen 0:04b43b777fae 50 delete drawerObj_;
MikamiUitOpen 0:04b43b777fae 51 }
MikamiUitOpen 0:04b43b777fae 52
MikamiUitOpen 0:04b43b777fae 53 // フィルタの再設計と周波数特性の再描画
MikamiUitOpen 0:04b43b777fae 54 bool DesignerDrawer::ReDesignAndDraw(Biquad::Coefs *ck, float &g0,
MikamiUitOpen 0:04b43b777fae 55 BilinearDesign::Type lpHp)
MikamiUitOpen 0:04b43b777fae 56 {
MikamiUitOpen 0:04b43b777fae 57 bool changed = (lpHp != lp_) ? true : false;
MikamiUitOpen 0:04b43b777fae 58 bool tch = tp_->IsTouched(cursorX_, cursorX_);
MikamiUitOpen 0:04b43b777fae 59 if (tch || changed)
MikamiUitOpen 0:04b43b777fae 60 {
MikamiUitOpen 0:04b43b777fae 61 int newFc = Frq10(drawerObj_->PosToFrq(cursorX_));
MikamiUitOpen 0:04b43b777fae 62 newFc = (newFc > HIGHER_F_) ? HIGHER_F_ : newFc;
MikamiUitOpen 0:04b43b777fae 63 if ((abs(newFc - fC_) >= 10) || changed)
MikamiUitOpen 0:04b43b777fae 64 {
MikamiUitOpen 0:04b43b777fae 65 fC_ = newFc;
MikamiUitOpen 0:04b43b777fae 66 lblFrq_->Draw("Cutoff frequency = %4d Hz", newFc);
MikamiUitOpen 0:04b43b777fae 67 designObj_->Execute(newFc, lpHp, coefs_, g0_);
MikamiUitOpen 0:04b43b777fae 68 GetCoefficients(ck, g0);
MikamiUitOpen 0:04b43b777fae 69
MikamiUitOpen 0:04b43b777fae 70 frqResp_.SetParams(ORDER_, g0_, ck_);
MikamiUitOpen 0:04b43b777fae 71 drawerObj_->Erase();
MikamiUitOpen 0:04b43b777fae 72 drawerObj_->DrawAxis(); // 目盛線の描画
MikamiUitOpen 0:04b43b777fae 73 drawerObj_->DrawGraph(frqResp_); // 周波数特性のグラフのカーブを描画する
MikamiUitOpen 0:04b43b777fae 74
MikamiUitOpen 0:04b43b777fae 75 if (tch) // カーソルの移動
MikamiUitOpen 0:04b43b777fae 76 {
MikamiUitOpen 0:04b43b777fae 77 lcd_->SetTextColor(CURSOR_TOUCHED_COLOR_);
MikamiUitOpen 0:04b43b777fae 78 lcd_->DrawVLine(cursorX_, CURSOR_Y0_, CURSOR_LENGTH_);
MikamiUitOpen 0:04b43b777fae 79 }
MikamiUitOpen 0:04b43b777fae 80 cursorRedraw_ = true;
MikamiUitOpen 0:04b43b777fae 81 oldCursorX_ = cursorX_;
MikamiUitOpen 0:04b43b777fae 82 lp_ = lpHp;
MikamiUitOpen 0:04b43b777fae 83 return true;
MikamiUitOpen 0:04b43b777fae 84 }
MikamiUitOpen 0:04b43b777fae 85 }
MikamiUitOpen 0:04b43b777fae 86
MikamiUitOpen 0:04b43b777fae 87 if (!tch && cursorRedraw_) // カーソルを元の色に戻す
MikamiUitOpen 0:04b43b777fae 88 {
MikamiUitOpen 0:04b43b777fae 89 lcd_->SetTextColor(CURSOR_COLOR_);
MikamiUitOpen 0:04b43b777fae 90 lcd_->DrawVLine(oldCursorX_, CURSOR_Y0_, CURSOR_LENGTH_);
MikamiUitOpen 0:04b43b777fae 91 cursorRedraw_ = false;
MikamiUitOpen 0:04b43b777fae 92 }
MikamiUitOpen 0:04b43b777fae 93 return false;
MikamiUitOpen 0:04b43b777fae 94 }
MikamiUitOpen 0:04b43b777fae 95
MikamiUitOpen 0:04b43b777fae 96 // 周波数特性の描画
MikamiUitOpen 0:04b43b777fae 97 void DesignerDrawer::DrawResponse()
MikamiUitOpen 0:04b43b777fae 98 {
MikamiUitOpen 0:04b43b777fae 99 lblFrq_->Draw("Cutoff frequency = %4d Hz", fC_);
MikamiUitOpen 0:04b43b777fae 100 drawerObj_->DrawAxis(); // 目盛線の描画
MikamiUitOpen 0:04b43b777fae 101 FrqRespDrawer::AxisX_Char numX[] = // 横軸の目盛値を描画する際に使う構造体の配列
MikamiUitOpen 0:04b43b777fae 102 {{ 100, "0.1"}, { 200, "0.2"}, { 500, "0.5"}, { 1000, "1"},
MikamiUitOpen 0:04b43b777fae 103 { 2000, "2"}, { 5000, "5"}, {10000, "10"}, {20000, "20"}};
MikamiUitOpen 2:2478e7a8e8d5 104 drawerObj_->DrawNumericX(numX, 8, 6, "Frequency [kHz]"); // 横軸の目盛
MikamiUitOpen 2:2478e7a8e8d5 105 drawerObj_->DrawNumericY(-24, -6, 20, "%3d"); // 縦軸の目盛は 20 dB 間隔
MikamiUitOpen 0:04b43b777fae 106 drawerObj_->DrawGraph(frqResp_); // 周波数特性のカーブの描画
MikamiUitOpen 0:04b43b777fae 107
MikamiUitOpen 0:04b43b777fae 108 cursorX_ = drawerObj_->X(fC_);
MikamiUitOpen 0:04b43b777fae 109 lcd_->SetTextColor(CURSOR_COLOR_);
MikamiUitOpen 0:04b43b777fae 110 lcd_->DrawVLine(cursorX_, CURSOR_Y0_, CURSOR_LENGTH_);
MikamiUitOpen 0:04b43b777fae 111 }
MikamiUitOpen 0:04b43b777fae 112
MikamiUitOpen 0:04b43b777fae 113 // フィルタ係数の取得
MikamiUitOpen 0:04b43b777fae 114 void DesignerDrawer::GetCoefficients(Biquad::Coefs *c, float &g0)
MikamiUitOpen 0:04b43b777fae 115 {
MikamiUitOpen 0:04b43b777fae 116 for (int k=0; k<ORDER_/2; k++) c[k] = ck_[k];
MikamiUitOpen 0:04b43b777fae 117 g0 = g0_;
MikamiUitOpen 0:04b43b777fae 118 }
MikamiUitOpen 0:04b43b777fae 119
MikamiUitOpen 0:04b43b777fae 120 // 周波数を 10, 20, 50, 100 Hz の倍数にする
MikamiUitOpen 0:04b43b777fae 121 int DesignerDrawer::Frq10(float f)
MikamiUitOpen 0:04b43b777fae 122 {
MikamiUitOpen 0:04b43b777fae 123 if (f < 1000)
MikamiUitOpen 0:04b43b777fae 124 return ((int)(f/10.0f + 0.5f))*10;
MikamiUitOpen 0:04b43b777fae 125 if (f < 2000)
MikamiUitOpen 0:04b43b777fae 126 return ((int)(f/20.0f + 0.5f))*20;
MikamiUitOpen 0:04b43b777fae 127 if (f < 3000)
MikamiUitOpen 0:04b43b777fae 128 return ((int)(f/50.0f + 0.5f))*50;
MikamiUitOpen 0:04b43b777fae 129 else
MikamiUitOpen 0:04b43b777fae 130 return ((int)(f/100.0f + 0.5f))*100;
MikamiUitOpen 0:04b43b777fae 131 }
MikamiUitOpen 0:04b43b777fae 132 }
MikamiUitOpen 0:04b43b777fae 133