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@12:85e7363da26a, 2019-04-03 (annotated)
- Committer:
- SanYune
- Date:
- Wed Apr 03 04:44:32 2019 +0000
- Revision:
- 12:85e7363da26a
- Parent:
- 11:769d986c10fa
Chapter006_Zara_F746NG
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 | 11:769d986c10fa | 7 | // 2016/06/17, 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 | { |
SanYune | 12:85e7363da26a | 17 | //sd_ = new SDFileSystem(STR_.c_str()); |
SanYune | 12:85e7363da26a | 18 | //sd_->mount(); |
MikamiUitOpen | 11:769d986c10fa | 19 | buffer.SetSize(bufferSize*2); |
MikamiUitOpen | 0:04b43b777fae | 20 | } |
MikamiUitOpen | 0:04b43b777fae | 21 | |
MikamiUitOpen | 0:04b43b777fae | 22 | SD_WavReader::~SD_WavReader() |
MikamiUitOpen | 0:04b43b777fae | 23 | { |
SanYune | 12:85e7363da26a | 24 | //sd_->unmount(); |
SanYune | 12:85e7363da26a | 25 | //delete sd_; |
MikamiUitOpen | 0:04b43b777fae | 26 | } |
MikamiUitOpen | 0:04b43b777fae | 27 | |
MikamiUitOpen | 0:04b43b777fae | 28 | void SD_WavReader::Open(const string fileName) |
MikamiUitOpen | 0:04b43b777fae | 29 | { |
MikamiUitOpen | 0:04b43b777fae | 30 | string name = (string)"/" + STR_ + "/" + fileName; |
MikamiUitOpen | 0:04b43b777fae | 31 | fp_ = fopen(name.c_str(), "rb"); |
MikamiUitOpen | 0:04b43b777fae | 32 | if (fp_ == NULL) ErrorMsg("open error!!"); |
MikamiUitOpen | 0:04b43b777fae | 33 | } |
MikamiUitOpen | 0:04b43b777fae | 34 | |
MikamiUitOpen | 0:04b43b777fae | 35 | |
MikamiUitOpen | 0:04b43b777fae | 36 | // ファイルのヘッダ (RIFFxxxxWAVEfm ) 読み込み |
MikamiUitOpen | 0:04b43b777fae | 37 | // 戻り値: *.wav で,16 ビットステレオ, |
MikamiUitOpen | 0:04b43b777fae | 38 | // 標本化周波数:44.1 kHz の場合 true |
MikamiUitOpen | 0:04b43b777fae | 39 | bool SD_WavReader::IsWavFile() |
MikamiUitOpen | 0:04b43b777fae | 40 | { |
MikamiUitOpen | 0:04b43b777fae | 41 | char data[17]; |
MikamiUitOpen | 0:04b43b777fae | 42 | fread(data, 1, 16, fp_); |
MikamiUitOpen | 0:04b43b777fae | 43 | string strRead = ""; |
MikamiUitOpen | 0:04b43b777fae | 44 | for (int n=0; n<4; n++) strRead += data[n]; |
MikamiUitOpen | 0:04b43b777fae | 45 | for (int n=8; n<16; n++) strRead += data[n]; |
MikamiUitOpen | 0:04b43b777fae | 46 | |
MikamiUitOpen | 0:04b43b777fae | 47 | // "RIFF", "WAVE", "fmt " が存在することを確認 |
MikamiUitOpen | 0:04b43b777fae | 48 | if (strRead != "RIFFWAVEfmt ") return false; |
MikamiUitOpen | 0:04b43b777fae | 49 | |
MikamiUitOpen | 0:04b43b777fae | 50 | // fmt chunck のサイズを取得 |
MikamiUitOpen | 0:04b43b777fae | 51 | uint32_t fmtChunkSize; |
MikamiUitOpen | 0:04b43b777fae | 52 | fread(&fmtChunkSize, sizeof(uint32_t), 1, fp_); |
MikamiUitOpen | 0:04b43b777fae | 53 | |
MikamiUitOpen | 0:04b43b777fae | 54 | // PCM, Stereo, 44.1 kHz, 16 bit であることを確認 |
MikamiUitOpen | 0:04b43b777fae | 55 | WaveFormatEx fmtData; |
MikamiUitOpen | 0:04b43b777fae | 56 | fread(&fmtData, fmtChunkSize, 1, fp_); |
MikamiUitOpen | 0:04b43b777fae | 57 | if ((fmtData.wFormatTag != 1) || |
MikamiUitOpen | 0:04b43b777fae | 58 | (fmtData.nChannels != 2) || |
MikamiUitOpen | 0:04b43b777fae | 59 | (fmtData.nSamplesPerSec != 44100) || |
MikamiUitOpen | 0:04b43b777fae | 60 | (fmtData.wBitsPerSample != 16) |
MikamiUitOpen | 0:04b43b777fae | 61 | ) return false; |
MikamiUitOpen | 0:04b43b777fae | 62 | |
MikamiUitOpen | 0:04b43b777fae | 63 | // data chunk を探す |
MikamiUitOpen | 0:04b43b777fae | 64 | char dataId[5]; |
MikamiUitOpen | 0:04b43b777fae | 65 | dataId[4] = 0; |
MikamiUitOpen | 0:04b43b777fae | 66 | fread(dataId, 1, 4, fp_); |
MikamiUitOpen | 0:04b43b777fae | 67 | if ("data" != (string)dataId) |
MikamiUitOpen | 0:04b43b777fae | 68 | for (int n=0; n<100; n++) |
MikamiUitOpen | 0:04b43b777fae | 69 | { |
MikamiUitOpen | 0:04b43b777fae | 70 | char oneByte; |
MikamiUitOpen | 0:04b43b777fae | 71 | fread(&oneByte, 1, 1, fp_); |
MikamiUitOpen | 0:04b43b777fae | 72 | for (int k=0; k<3; k++) |
MikamiUitOpen | 0:04b43b777fae | 73 | dataId[k] = dataId[k+1]; |
MikamiUitOpen | 0:04b43b777fae | 74 | dataId[3] = oneByte; |
MikamiUitOpen | 0:04b43b777fae | 75 | if ("data" == (string)dataId) break; |
MikamiUitOpen | 0:04b43b777fae | 76 | |
MikamiUitOpen | 0:04b43b777fae | 77 | if (n == 99) return false; |
MikamiUitOpen | 0:04b43b777fae | 78 | } |
MikamiUitOpen | 0:04b43b777fae | 79 | |
MikamiUitOpen | 0:04b43b777fae | 80 | // データサイズ (byte) を取得 |
MikamiUitOpen | 0:04b43b777fae | 81 | int32_t sizeByte; |
MikamiUitOpen | 0:04b43b777fae | 82 | fread(&sizeByte, sizeof(int32_t), 1, fp_); |
MikamiUitOpen | 0:04b43b777fae | 83 | size_ = sizeByte/4; |
MikamiUitOpen | 0:04b43b777fae | 84 | |
MikamiUitOpen | 0:04b43b777fae | 85 | ok_ = true; |
MikamiUitOpen | 0:04b43b777fae | 86 | return true; |
MikamiUitOpen | 0:04b43b777fae | 87 | } |
MikamiUitOpen | 0:04b43b777fae | 88 | |
MikamiUitOpen | 11:769d986c10fa | 89 | // ファイルからステレオデータの取得 |
MikamiUitOpen | 11:769d986c10fa | 90 | void SD_WavReader::ReadStereo(Array<int16_t>& dataL, |
MikamiUitOpen | 11:769d986c10fa | 91 | Array<int16_t>& dataR) |
MikamiUitOpen | 0:04b43b777fae | 92 | { |
MikamiUitOpen | 0:04b43b777fae | 93 | if (!ok_) ErrorMsg("Get data FAILED"); |
MikamiUitOpen | 11:769d986c10fa | 94 | uint32_t size = dataL.Length(); |
MikamiUitOpen | 11:769d986c10fa | 95 | fread(buffer, sizeof(int16_t), size*2, fp_); |
MikamiUitOpen | 11:769d986c10fa | 96 | for (int n=0; n<size; n++) |
MikamiUitOpen | 11:769d986c10fa | 97 | { |
MikamiUitOpen | 11:769d986c10fa | 98 | dataL[n] = buffer[2*n]; |
MikamiUitOpen | 11:769d986c10fa | 99 | dataR[n] = buffer[2*n+1]; |
MikamiUitOpen | 11:769d986c10fa | 100 | } |
MikamiUitOpen | 11:769d986c10fa | 101 | } |
MikamiUitOpen | 0:04b43b777fae | 102 | |
MikamiUitOpen | 0:04b43b777fae | 103 | // ファイルからデータをモノラルに変換しての取得 |
MikamiUitOpen | 11:769d986c10fa | 104 | void SD_WavReader::ReadAndToMono(Array<int16_t>& data) |
MikamiUitOpen | 0:04b43b777fae | 105 | { |
MikamiUitOpen | 0:04b43b777fae | 106 | if (!ok_) ErrorMsg("Get data FAILED"); |
MikamiUitOpen | 11:769d986c10fa | 107 | uint32_t size = data.Length(); |
MikamiUitOpen | 0:04b43b777fae | 108 | fread(buffer, sizeof(int16_t), size*2, fp_); |
MikamiUitOpen | 0:04b43b777fae | 109 | for (int n=0; n<size; n++) |
MikamiUitOpen | 0:04b43b777fae | 110 | data[n] = (buffer[2*n] + buffer[2*n+1])/2; |
MikamiUitOpen | 0:04b43b777fae | 111 | } |
MikamiUitOpen | 0:04b43b777fae | 112 | |
MikamiUitOpen | 0:04b43b777fae | 113 | // データサイズ(標本化点の数)の取得 |
MikamiUitOpen | 0:04b43b777fae | 114 | int32_t SD_WavReader::GetSize() |
MikamiUitOpen | 0:04b43b777fae | 115 | { |
MikamiUitOpen | 0:04b43b777fae | 116 | if (!ok_) ErrorMsg("Get data size FAILED"); |
MikamiUitOpen | 0:04b43b777fae | 117 | return size_; |
MikamiUitOpen | 0:04b43b777fae | 118 | } |
MikamiUitOpen | 0:04b43b777fae | 119 | } |