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Dependencies:   BSP_DISCO_F746NG F746_GUI F746_SAI_IO FrequencyResponseDrawer LCD_DISCO_F746NG SDFileSystem_Warning_Fixed TS_DISCO_F746NG mbed

Fork of F746_SD_GraphicEqualizer by 不韋 呂

MyClasses_Functions/SD_WavReader.hpp@8:12aa05f3cc24, 2016-05-09 (annotated)

Committer:
MikamiUitOpen
Date:
Mon May 09 08:54:09 2016 +0000
Revision:
8:12aa05f3cc24
Parent:
0:e953eb392151
Child:
10:fc6367c2ffcf
8

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:e953eb392151 1 //--------------------------------------------------------------
MikamiUitOpen 0:e953eb392151 2 // SD_WavReader class ---- Header
MikamiUitOpen 0:e953eb392151 3 // SD カードの *.wav ファイルの内容を読み出す
MikamiUitOpen 0:e953eb392151 4 // 以下のフォーマット以外は扱わない
MikamiUitOpen 0:e953eb392151 5 // PCM，16 ビットステレオ，標本化周波数 44.1 kHz
MikamiUitOpen 0:e953eb392151 6 //
MikamiUitOpen 0:e953eb392151 7 // 2016/04/19, Copyright (c) 2016 MIKAMI, Naoki
MikamiUitOpen 0:e953eb392151 8 //--------------------------------------------------------------
MikamiUitOpen 0:e953eb392151 9
MikamiUitOpen 0:e953eb392151 10 #ifndef SD_WAV_READER_HPP
MikamiUitOpen 0:e953eb392151 11 #define SD_WAV_READER_HPP
MikamiUitOpen 0:e953eb392151 12
MikamiUitOpen 0:e953eb392151 13 #include "SDFileSystem.h"
MikamiUitOpen 0:e953eb392151 14 #include "BlinkLabel.hpp"
MikamiUitOpen 0:e953eb392151 15 #include <string>
MikamiUitOpen 0:e953eb392151 16
MikamiUitOpen 0:e953eb392151 17 namespace Mikami
MikamiUitOpen 0:e953eb392151 18 {
MikamiUitOpen 0:e953eb392151 19 class SD_WavReader
MikamiUitOpen 0:e953eb392151 20 {
MikamiUitOpen 0:e953eb392151 21 public:
MikamiUitOpen 0:e953eb392151 22 SD_WavReader(int32_t bufferSize);
MikamiUitOpen 0:e953eb392151 23 ~SD_WavReader();
MikamiUitOpen 0:e953eb392151 24
MikamiUitOpen 0:e953eb392151 25 void Open(const string fileName);
MikamiUitOpen 0:e953eb392151 26
MikamiUitOpen 0:e953eb392151 27 void Close() { fclose(fp_); }
MikamiUitOpen 0:e953eb392151 28
MikamiUitOpen 0:e953eb392151 29 // ファイルのヘッダ (RIFFxxxxWAVEfm ) 読み込み
MikamiUitOpen 0:e953eb392151 30 // 戻り値： *.wav で，16 ビットステレオ，
MikamiUitOpen 0:e953eb392151 31 // 標本化周波数：44.1 kHz の場合 true
MikamiUitOpen 0:e953eb392151 32 bool IsWavFile();
MikamiUitOpen 0:e953eb392151 33
MikamiUitOpen 0:e953eb392151 34 // ファイルからデータの取得
MikamiUitOpen 0:e953eb392151 35 void Read(int16_t data[], uint32_t size);
MikamiUitOpen 0:e953eb392151 36
MikamiUitOpen 0:e953eb392151 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:e953eb392151 38 void ReadAndToMono(int16_t data[], uint32_t size);
MikamiUitOpen 0:e953eb392151 39
MikamiUitOpen 0:e953eb392151 40 // データサイズ（標本化点の数）の取得
MikamiUitOpen 0:e953eb392151 41 int32_t GetSize();
MikamiUitOpen 0:e953eb392151 42
MikamiUitOpen 0:e953eb392151 43 private:
MikamiUitOpen 0:e953eb392151 44 const string STR_;
MikamiUitOpen 0:e953eb392151 45
MikamiUitOpen 0:e953eb392151 46 struct WaveFormatEx
MikamiUitOpen 0:e953eb392151 47 {
MikamiUitOpen 0:e953eb392151 48 uint16_t wFormatTag; // 1: PCM
MikamiUitOpen 0:e953eb392151 49 uint16_t nChannels; // 1：モノラル，2: ステレオ
MikamiUitOpen 0:e953eb392151 50 uint32_t nSamplesPerSec; // 標本化周波数 (Hz)
MikamiUitOpen 0:e953eb392151 51 uint32_t nAvgBytesPerSec; // 転送速度 (bytes/s)
MikamiUitOpen 0:e953eb392151 52 uint16_t nBlockAlign; // 4: 16ビットステレオの場合
MikamiUitOpen 0:e953eb392151 53 uint16_t wBitsPerSample; // データのビット数，8 または 16
MikamiUitOpen 0:e953eb392151 54 uint16_t cbSize;
MikamiUitOpen 0:e953eb392151 55 };
MikamiUitOpen 0:e953eb392151 56
MikamiUitOpen 0:e953eb392151 57 SDFileSystem *sd_;
MikamiUitOpen 0:e953eb392151 58 FILE *fp_;
MikamiUitOpen 0:e953eb392151 59
MikamiUitOpen 0:e953eb392151 60 bool ok_;
MikamiUitOpen 0:e953eb392151 61 int32_t size_; // モノラルデータのサイズ
MikamiUitOpen 0:e953eb392151 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:e953eb392151 63
MikamiUitOpen 0:e953eb392151 64 void ErrorMsg(char msg[])
MikamiUitOpen 0:e953eb392151 65 { BlinkLabel errLabel(240, 100, msg, Label::CENTER); }
MikamiUitOpen 0:e953eb392151 66
MikamiUitOpen 0:e953eb392151 67 // disallow copy constructor and assignment operator
MikamiUitOpen 0:e953eb392151 68 SD_WavReader(const SD_WavReader&);
MikamiUitOpen 0:e953eb392151 69 SD_WavReader& operator=(const SD_WavReader&);
MikamiUitOpen 0:e953eb392151 70 };
MikamiUitOpen 0:e953eb392151 71 }
MikamiUitOpen 0:e953eb392151 72 #endif // SD_BINARY_READER_HPP