Chapter006_Zara_F746NG
Dependencies: F746_GUI SRF08 Array_Matrix TS_DISCO_F746NG mbed LCD_DISCO_F746NG BSP_DISCO_F746NG SDFileSystem_Warning_Fixed FrequencyResponseDrawer F746_SAI_IO
MyClasses_Functions/SD_WavReader.cpp@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?
User | Revision | Line number | New contents of line |
---|---|---|---|
MikamiUitOpen | 0:04b43b777fae | 1 | //-------------------------------------------------------------- |
MikamiUitOpen | 0:04b43b777fae | 2 | // SD_WavReader class |
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 | #include "SD_WavReader.hpp" |
MikamiUitOpen | 0:04b43b777fae | 11 | |
MikamiUitOpen | 0:04b43b777fae | 12 | namespace Mikami |
MikamiUitOpen | 0:04b43b777fae | 13 | { |
MikamiUitOpen | 0:04b43b777fae | 14 | SD_WavReader::SD_WavReader(int32_t bufferSize) |
MikamiUitOpen | 0:04b43b777fae | 15 | : STR_("sd"), ok_(false) |
MikamiUitOpen | 0:04b43b777fae | 16 | { |
MikamiUitOpen | 0:04b43b777fae | 17 | sd_ = new SDFileSystem(STR_.c_str()); |
MikamiUitOpen | 0:04b43b777fae | 18 | sd_->mount(); |
MikamiUitOpen | 0:04b43b777fae | 19 | |
MikamiUitOpen | 0:04b43b777fae | 20 | buffer = new int16_t[bufferSize*2]; |
MikamiUitOpen | 0:04b43b777fae | 21 | } |
MikamiUitOpen | 0:04b43b777fae | 22 | |
MikamiUitOpen | 0:04b43b777fae | 23 | SD_WavReader::~SD_WavReader() |
MikamiUitOpen | 0:04b43b777fae | 24 | { |
MikamiUitOpen | 0:04b43b777fae | 25 | delete[] buffer; |
MikamiUitOpen | 0:04b43b777fae | 26 | sd_->unmount(); |
MikamiUitOpen | 0:04b43b777fae | 27 | delete sd_; |
MikamiUitOpen | 0:04b43b777fae | 28 | } |
MikamiUitOpen | 0:04b43b777fae | 29 | |
MikamiUitOpen | 0:04b43b777fae | 30 | void SD_WavReader::Open(const string fileName) |
MikamiUitOpen | 0:04b43b777fae | 31 | { |
MikamiUitOpen | 0:04b43b777fae | 32 | string name = (string)"/" + STR_ + "/" + fileName; |
MikamiUitOpen | 0:04b43b777fae | 33 | fp_ = fopen(name.c_str(), "rb"); |
MikamiUitOpen | 0:04b43b777fae | 34 | if (fp_ == NULL) ErrorMsg("open error!!"); |
MikamiUitOpen | 0:04b43b777fae | 35 | } |
MikamiUitOpen | 0:04b43b777fae | 36 | |
MikamiUitOpen | 0:04b43b777fae | 37 | |
MikamiUitOpen | 0:04b43b777fae | 38 | // ファイルのヘッダ (RIFFxxxxWAVEfm ) 読み込み |
MikamiUitOpen | 0:04b43b777fae | 39 | // 戻り値: *.wav で,16 ビットステレオ, |
MikamiUitOpen | 0:04b43b777fae | 40 | // 標本化周波数:44.1 kHz の場合 true |
MikamiUitOpen | 0:04b43b777fae | 41 | bool SD_WavReader::IsWavFile() |
MikamiUitOpen | 0:04b43b777fae | 42 | { |
MikamiUitOpen | 0:04b43b777fae | 43 | char data[17]; |
MikamiUitOpen | 0:04b43b777fae | 44 | fread(data, 1, 16, fp_); |
MikamiUitOpen | 0:04b43b777fae | 45 | string strRead = ""; |
MikamiUitOpen | 0:04b43b777fae | 46 | for (int n=0; n<4; n++) strRead += data[n]; |
MikamiUitOpen | 0:04b43b777fae | 47 | for (int n=8; n<16; n++) strRead += data[n]; |
MikamiUitOpen | 0:04b43b777fae | 48 | |
MikamiUitOpen | 0:04b43b777fae | 49 | // "RIFF", "WAVE", "fmt " が存在することを確認 |
MikamiUitOpen | 0:04b43b777fae | 50 | if (strRead != "RIFFWAVEfmt ") return false; |
MikamiUitOpen | 0:04b43b777fae | 51 | |
MikamiUitOpen | 0:04b43b777fae | 52 | // fmt chunck のサイズを取得 |
MikamiUitOpen | 0:04b43b777fae | 53 | uint32_t fmtChunkSize; |
MikamiUitOpen | 0:04b43b777fae | 54 | fread(&fmtChunkSize, sizeof(uint32_t), 1, fp_); |
MikamiUitOpen | 0:04b43b777fae | 55 | |
MikamiUitOpen | 0:04b43b777fae | 56 | // PCM, Stereo, 44.1 kHz, 16 bit であることを確認 |
MikamiUitOpen | 0:04b43b777fae | 57 | WaveFormatEx fmtData; |
MikamiUitOpen | 0:04b43b777fae | 58 | fread(&fmtData, fmtChunkSize, 1, fp_); |
MikamiUitOpen | 0:04b43b777fae | 59 | if ((fmtData.wFormatTag != 1) || |
MikamiUitOpen | 0:04b43b777fae | 60 | (fmtData.nChannels != 2) || |
MikamiUitOpen | 0:04b43b777fae | 61 | (fmtData.nSamplesPerSec != 44100) || |
MikamiUitOpen | 0:04b43b777fae | 62 | (fmtData.wBitsPerSample != 16) |
MikamiUitOpen | 0:04b43b777fae | 63 | ) return false; |
MikamiUitOpen | 0:04b43b777fae | 64 | |
MikamiUitOpen | 0:04b43b777fae | 65 | // data chunk を探す |
MikamiUitOpen | 0:04b43b777fae | 66 | char dataId[5]; |
MikamiUitOpen | 0:04b43b777fae | 67 | dataId[4] = 0; |
MikamiUitOpen | 0:04b43b777fae | 68 | fread(dataId, 1, 4, fp_); |
MikamiUitOpen | 0:04b43b777fae | 69 | if ("data" != (string)dataId) |
MikamiUitOpen | 0:04b43b777fae | 70 | for (int n=0; n<100; n++) |
MikamiUitOpen | 0:04b43b777fae | 71 | { |
MikamiUitOpen | 0:04b43b777fae | 72 | char oneByte; |
MikamiUitOpen | 0:04b43b777fae | 73 | fread(&oneByte, 1, 1, fp_); |
MikamiUitOpen | 0:04b43b777fae | 74 | for (int k=0; k<3; k++) |
MikamiUitOpen | 0:04b43b777fae | 75 | dataId[k] = dataId[k+1]; |
MikamiUitOpen | 0:04b43b777fae | 76 | dataId[3] = oneByte; |
MikamiUitOpen | 0:04b43b777fae | 77 | if ("data" == (string)dataId) break; |
MikamiUitOpen | 0:04b43b777fae | 78 | |
MikamiUitOpen | 0:04b43b777fae | 79 | if (n == 99) return false; |
MikamiUitOpen | 0:04b43b777fae | 80 | } |
MikamiUitOpen | 0:04b43b777fae | 81 | |
MikamiUitOpen | 0:04b43b777fae | 82 | // データサイズ (byte) を取得 |
MikamiUitOpen | 0:04b43b777fae | 83 | int32_t sizeByte; |
MikamiUitOpen | 0:04b43b777fae | 84 | fread(&sizeByte, sizeof(int32_t), 1, fp_); |
MikamiUitOpen | 0:04b43b777fae | 85 | size_ = sizeByte/4; |
MikamiUitOpen | 0:04b43b777fae | 86 | |
MikamiUitOpen | 0:04b43b777fae | 87 | ok_ = true; |
MikamiUitOpen | 0:04b43b777fae | 88 | return true; |
MikamiUitOpen | 0:04b43b777fae | 89 | } |
MikamiUitOpen | 0:04b43b777fae | 90 | |
MikamiUitOpen | 0:04b43b777fae | 91 | // ファイルからデータの取得 |
MikamiUitOpen | 0:04b43b777fae | 92 | void SD_WavReader::Read(int16_t data[], uint32_t size) |
MikamiUitOpen | 0:04b43b777fae | 93 | { |
MikamiUitOpen | 0:04b43b777fae | 94 | if (!ok_) ErrorMsg("Get data FAILED"); |
MikamiUitOpen | 0:04b43b777fae | 95 | fread(data, sizeof(int16_t), size, fp_); |
MikamiUitOpen | 0:04b43b777fae | 96 | } |
MikamiUitOpen | 0:04b43b777fae | 97 | |
MikamiUitOpen | 0:04b43b777fae | 98 | // 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 | 99 | void SD_WavReader::ReadAndToMono(int16_t data[], uint32_t size) |
MikamiUitOpen | 0:04b43b777fae | 100 | { |
MikamiUitOpen | 0:04b43b777fae | 101 | if (!ok_) ErrorMsg("Get data FAILED"); |
MikamiUitOpen | 0:04b43b777fae | 102 | fread(buffer, sizeof(int16_t), size*2, fp_); |
MikamiUitOpen | 0:04b43b777fae | 103 | for (int n=0; n<size; n++) |
MikamiUitOpen | 0:04b43b777fae | 104 | data[n] = (buffer[2*n] + buffer[2*n+1])/2; |
MikamiUitOpen | 0:04b43b777fae | 105 | } |
MikamiUitOpen | 0:04b43b777fae | 106 | |
MikamiUitOpen | 0:04b43b777fae | 107 | // データサイズ(標本化点の数)の取得 |
MikamiUitOpen | 0:04b43b777fae | 108 | int32_t SD_WavReader::GetSize() |
MikamiUitOpen | 0:04b43b777fae | 109 | { |
MikamiUitOpen | 0:04b43b777fae | 110 | if (!ok_) ErrorMsg("Get data size FAILED"); |
MikamiUitOpen | 0:04b43b777fae | 111 | return size_; |
MikamiUitOpen | 0:04b43b777fae | 112 | } |
MikamiUitOpen | 0:04b43b777fae | 113 | } |