不韋 呂 / Mbed 2 deprecated F746_AudioPlayerSD

Output the audio signal (*.bin) with filtering by IIR filter in the SD card using onboard CODEC. For *.wav file, F746_SD_WavPlayer and F746_SD_GraphicEqualiser are published on mbed. SD カードのオーディオ信号 (*.bin) 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．*.wav 形式のファイル用には，F746_SD_WavPlayer と F746_SD_GraphicEqualiser を mbed で公開している．

Dependencies:   BSP_DISCO_F746NG_patch_fixed F746_GUI LCD_DISCO_F746NG SDFileSystem_Warning_Fixed TS_DISCO_F746NG mbed

MyClasses_Functions/MyFunctions.cpp@0:6748e3332e85, 2016-04-08 (annotated)

Committer:
MikamiUitOpen
Date:
Fri Apr 08 13:11:53 2016 +0000
Revision:
0:6748e3332e85
1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:6748e3332e85 1 //--------------------------------------------------------------
MikamiUitOpen 0:6748e3332e85 2 // フィルタ処理付き SD オーディオプレーヤーで使う大域関数（ヘッダ）
MikamiUitOpen 0:6748e3332e85 3 //
MikamiUitOpen 0:6748e3332e85 4 // 2016/04/07, Copyright (c) 2016 MIKAMI, Naoki
MikamiUitOpen 0:6748e3332e85 5 //--------------------------------------------------------------
MikamiUitOpen 0:6748e3332e85 6
MikamiUitOpen 0:6748e3332e85 7 #include "MyFunctions.hpp"
MikamiUitOpen 0:6748e3332e85 8
MikamiUitOpen 0:6748e3332e85 9 // １フレーム分の信号処理 (IIR フィルタ) の実行
MikamiUitOpen 0:6748e3332e85 10 void ProcessSignal(SD_BinaryReader &sdReader, SaiIO_O &mySai,
MikamiUitOpen 0:6748e3332e85 11 int16_t sn[], float g0, Biquad hn[],
MikamiUitOpen 0:6748e3332e85 12 int order, bool filterOn)
MikamiUitOpen 0:6748e3332e85 13 {
MikamiUitOpen 0:6748e3332e85 14 sdReader.Read(sn, mySai.GetLength()); // １フレーム分のデータを SD から読み込む
MikamiUitOpen 0:6748e3332e85 15
MikamiUitOpen 0:6748e3332e85 16 while (!mySai.IsXferred()) {} // データの転送が終わるまで待つ
MikamiUitOpen 0:6748e3332e85 17 //--------------------------------------------------------------
MikamiUitOpen 0:6748e3332e85 18 // １フレーム分の信号処理を行い，その結果を出力する
MikamiUitOpen 0:6748e3332e85 19 for (int n=0; n<mySai.GetLength(); n++)
MikamiUitOpen 0:6748e3332e85 20 {
MikamiUitOpen 0:6748e3332e85 21 int16_t value;
MikamiUitOpen 0:6748e3332e85 22 if (filterOn) // フィルタ処理実行
MikamiUitOpen 0:6748e3332e85 23 {
MikamiUitOpen 0:6748e3332e85 24 // 縦続形の IIR フィルタ
MikamiUitOpen 0:6748e3332e85 25 float yn = g0*sn[n];
MikamiUitOpen 0:6748e3332e85 26 for (int k=0; k<order/2; k++) yn = hn[k].Execute(yn);
MikamiUitOpen 0:6748e3332e85 27 value = (int16_t)yn;
MikamiUitOpen 0:6748e3332e85 28 }
MikamiUitOpen 0:6748e3332e85 29 else
MikamiUitOpen 0:6748e3332e85 30 value = sn[n]; // フィルタ処理なし
MikamiUitOpen 0:6748e3332e85 31 mySai.Output(value, value); // 音響信号の出力
MikamiUitOpen 0:6748e3332e85 32 }
MikamiUitOpen 0:6748e3332e85 33 //--------------------------------------------------------------
MikamiUitOpen 0:6748e3332e85 34 mySai.ResetXferred(); // 次のデータ転送に備える
MikamiUitOpen 0:6748e3332e85 35 }
MikamiUitOpen 0:6748e3332e85 36
MikamiUitOpen 0:6748e3332e85 37 // SD カードのファイルのオープン
MikamiUitOpen 0:6748e3332e85 38 int32_t SD_Open(SD_BinaryReader &sdReader,
MikamiUitOpen 0:6748e3332e85 39 string fileName, int32_t frameSize)
MikamiUitOpen 0:6748e3332e85 40 {
MikamiUitOpen 0:6748e3332e85 41 sdReader.Open(fileName);
MikamiUitOpen 0:6748e3332e85 42 return sdReader.ReadSize()/frameSize;
MikamiUitOpen 0:6748e3332e85 43 }
MikamiUitOpen 0:6748e3332e85 44
MikamiUitOpen 0:6748e3332e85 45 // ファイルの選択
MikamiUitOpen 0:6748e3332e85 46 // selectedName: 選択されたファイル名
MikamiUitOpen 0:6748e3332e85 47 void SelectFile(ButtonGroup &menu, FileSelector &selector,
MikamiUitOpen 0:6748e3332e85 48 Label &msg, string &selectedName)
MikamiUitOpen 0:6748e3332e85 49 {
MikamiUitOpen 0:6748e3332e85 50 msg.Draw("Select file");
MikamiUitOpen 0:6748e3332e85 51 selector.DisplayFileList();
MikamiUitOpen 0:6748e3332e85 52 do
MikamiUitOpen 0:6748e3332e85 53 {
MikamiUitOpen 0:6748e3332e85 54 if (selector.Select(selectedName))
MikamiUitOpen 0:6748e3332e85 55 menu.Activate(1); // PLAY 有効
MikamiUitOpen 0:6748e3332e85 56 wait_ms(200);
MikamiUitOpen 0:6748e3332e85 57 } while (!menu.Touched(1)); // PLAY がタッチされるまで繰り返す
MikamiUitOpen 0:6748e3332e85 58 }
MikamiUitOpen 0:6748e3332e85 59
MikamiUitOpen 0:6748e3332e85 60 // フィルタの変更
MikamiUitOpen 0:6748e3332e85 61 void ModifyFilter(DesignerDrawer &drawerObj,
MikamiUitOpen 0:6748e3332e85 62 ButtonGroup &lpHp, ButtonGroup &onOff,
MikamiUitOpen 0:6748e3332e85 63 Biquad hn[], Biquad::Coefs ck[],
MikamiUitOpen 0:6748e3332e85 64 float &g0, bool &filterOn)
MikamiUitOpen 0:6748e3332e85 65 {
MikamiUitOpen 0:6748e3332e85 66 // フィルタ処理の有効／無効切り替え
MikamiUitOpen 0:6748e3332e85 67 int sw = 0;
MikamiUitOpen 0:6748e3332e85 68 if (onOff.GetTouchedNumber(sw))
MikamiUitOpen 0:6748e3332e85 69 filterOn = (sw == 0) ? true : false;
MikamiUitOpen 0:6748e3332e85 70
MikamiUitOpen 0:6748e3332e85 71 // フィルタの周波数特性の変更
MikamiUitOpen 0:6748e3332e85 72 static int num = 0;
MikamiUitOpen 0:6748e3332e85 73 lpHp.GetTouchedNumber(num);
MikamiUitOpen 0:6748e3332e85 74 BilinearDesign::Type typeLH = (BilinearDesign::Type)num;
MikamiUitOpen 0:6748e3332e85 75 if (drawerObj.ReDesignAndDraw(ck, g0, typeLH))
MikamiUitOpen 0:6748e3332e85 76 for (int k=0; k<drawerObj.GetOrder()/2; k++)
MikamiUitOpen 0:6748e3332e85 77 {
MikamiUitOpen 0:6748e3332e85 78 hn[k].SetCoefficients(ck[k]);
MikamiUitOpen 0:6748e3332e85 79 hn[k].Clear();
MikamiUitOpen 0:6748e3332e85 80 }
MikamiUitOpen 0:6748e3332e85 81 }