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/SD_WavReader.hpp@0:04b43b777fae, 2016-04-19 (annotated)

Committer:
MikamiUitOpen
Date:
Tue Apr 19 09:46:11 2016 +0000
Revision:
0:04b43b777fae
Child:
11:769d986c10fa
1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:04b43b777fae 1 //--------------------------------------------------------------
MikamiUitOpen 0:04b43b777fae 2 // SD_WavReader class ---- Header
MikamiUitOpen 0:04b43b777fae 3 // SD カードの *.wav ファイルの内容を読み出す
MikamiUitOpen 0:04b43b777fae 4 // 以下のフォーマット以外は扱わない
MikamiUitOpen 0:04b43b777fae 5 // PCM，16 ビットステレオ，標本化周波数 44.1 kHz
MikamiUitOpen 0:04b43b777fae 6 //
MikamiUitOpen 0:04b43b777fae 7 // 2016/04/19, Copyright (c) 2016 MIKAMI, Naoki
MikamiUitOpen 0:04b43b777fae 8 //--------------------------------------------------------------
MikamiUitOpen 0:04b43b777fae 9
MikamiUitOpen 0:04b43b777fae 10 #ifndef SD_WAV_READER_HPP
MikamiUitOpen 0:04b43b777fae 11 #define SD_WAV_READER_HPP
MikamiUitOpen 0:04b43b777fae 12
MikamiUitOpen 0:04b43b777fae 13 #include "SDFileSystem.h"
MikamiUitOpen 0:04b43b777fae 14 #include "BlinkLabel.hpp"
MikamiUitOpen 0:04b43b777fae 15 #include <string>
MikamiUitOpen 0:04b43b777fae 16
MikamiUitOpen 0:04b43b777fae 17 namespace Mikami
MikamiUitOpen 0:04b43b777fae 18 {
MikamiUitOpen 0:04b43b777fae 19 class SD_WavReader
MikamiUitOpen 0:04b43b777fae 20 {
MikamiUitOpen 0:04b43b777fae 21 public:
MikamiUitOpen 0:04b43b777fae 22 SD_WavReader(int32_t bufferSize);
MikamiUitOpen 0:04b43b777fae 23 ~SD_WavReader();
MikamiUitOpen 0:04b43b777fae 24
MikamiUitOpen 0:04b43b777fae 25 void Open(const string fileName);
MikamiUitOpen 0:04b43b777fae 26
MikamiUitOpen 0:04b43b777fae 27 void Close() { fclose(fp_); }
MikamiUitOpen 0:04b43b777fae 28
MikamiUitOpen 0:04b43b777fae 29 // ファイルのヘッダ (RIFFxxxxWAVEfm ) 読み込み
MikamiUitOpen 0:04b43b777fae 30 // 戻り値： *.wav で，16 ビットステレオ，
MikamiUitOpen 0:04b43b777fae 31 // 標本化周波数：44.1 kHz の場合 true
MikamiUitOpen 0:04b43b777fae 32 bool IsWavFile();
MikamiUitOpen 0:04b43b777fae 33
MikamiUitOpen 0:04b43b777fae 34 // ファイルからデータの取得
MikamiUitOpen 0:04b43b777fae 35 void Read(int16_t data[], uint32_t size);
MikamiUitOpen 0:04b43b777fae 36
MikamiUitOpen 0:04b43b777fae 37 // ファイルからデータをモノラルに変換しての取得
MikamiUitOpen 0:04b43b777fae 38 void ReadAndToMono(int16_t data[], uint32_t size);
MikamiUitOpen 0:04b43b777fae 39
MikamiUitOpen 0:04b43b777fae 40 // データサイズ（標本化点の数）の取得
MikamiUitOpen 0:04b43b777fae 41 int32_t GetSize();
MikamiUitOpen 0:04b43b777fae 42
MikamiUitOpen 0:04b43b777fae 43 private:
MikamiUitOpen 0:04b43b777fae 44 const string STR_;
MikamiUitOpen 0:04b43b777fae 45
MikamiUitOpen 0:04b43b777fae 46 struct WaveFormatEx
MikamiUitOpen 0:04b43b777fae 47 {
MikamiUitOpen 0:04b43b777fae 48 uint16_t wFormatTag; // 1: PCM
MikamiUitOpen 0:04b43b777fae 49 uint16_t nChannels; // 1：モノラル，2: ステレオ
MikamiUitOpen 0:04b43b777fae 50 uint32_t nSamplesPerSec; // 標本化周波数 (Hz)
MikamiUitOpen 0:04b43b777fae 51 uint32_t nAvgBytesPerSec; // 転送速度 (bytes/s)
MikamiUitOpen 0:04b43b777fae 52 uint16_t nBlockAlign; // 4: 16ビットステレオの場合
MikamiUitOpen 0:04b43b777fae 53 uint16_t wBitsPerSample; // データのビット数，8 または 16
MikamiUitOpen 0:04b43b777fae 54 uint16_t cbSize;
MikamiUitOpen 0:04b43b777fae 55 };
MikamiUitOpen 0:04b43b777fae 56
MikamiUitOpen 0:04b43b777fae 57 SDFileSystem *sd_;
MikamiUitOpen 0:04b43b777fae 58 FILE *fp_;
MikamiUitOpen 0:04b43b777fae 59
MikamiUitOpen 0:04b43b777fae 60 bool ok_;
MikamiUitOpen 0:04b43b777fae 61 int32_t size_; // モノラルデータのサイズ
MikamiUitOpen 0:04b43b777fae 62 int16_t *buffer; // ステレオをモノラルに変換する際の作業領域
MikamiUitOpen 0:04b43b777fae 63
MikamiUitOpen 0:04b43b777fae 64 void ErrorMsg(char msg[])
MikamiUitOpen 0:04b43b777fae 65 { BlinkLabel errLabel(240, 100, msg, Label::CENTER); }
MikamiUitOpen 0:04b43b777fae 66
MikamiUitOpen 0:04b43b777fae 67 // disallow copy constructor and assignment operator
MikamiUitOpen 0:04b43b777fae 68 SD_WavReader(const SD_WavReader&);
MikamiUitOpen 0:04b43b777fae 69 SD_WavReader& operator=(const SD_WavReader&);
MikamiUitOpen 0:04b43b777fae 70 };
MikamiUitOpen 0:04b43b777fae 71 }
MikamiUitOpen 0:04b43b777fae 72 #endif // SD_BINARY_READER_HPP