C++ SMF File作成

C++でSMFを出力するメモ

#include <iostream>

using namespace std;

int main(){

    unsigned char a[] = {
        0x4D,0x54,0x68,0x64,
        0x00,0x00,0x00,0x06,
        0x00,0x01,
        0x00,0x02,
        0x00,0x30,
        
        0x4D,0x54,0x72,0x6B,//MTrk
        0x00,0x00,0x00,0x0B,
        0x00,0xFF,0x51,0x03,0x07,0xA1,0x20,
        0x00,0xFF,0x2F,0x00,//トラックエンド
        0x4D,0x54,0x72,0x6B ,
        0x00,0x00,0x00,0x18 ,
        0x00,0x90,0x3C,0x7F ,
        0x30,0x3C,0x00,
        0x00,0x3E,0x7F,
        0x30,0x3E,0x00,
        0x00,0x40,0x7f,
        0x81,0x40,0x40,0x00,
        0x00,0xFF,0x2F,0x00,     //トラックエンド
    };
        
    int j = sizeof(a) / sizeof(a[0]);   //変数aの要素数を計算します。

    FILE *fp;
    fp = fopen("/Users/******/Desktop/aaaa.mid","wb");
    if(fp == NULL){ return 0; } //fpがNULLなら関数を抜ける
    fwrite( a , sizeof(unsigned char) , j ,fp);
    fclose(fp);

    return 0;
}

#include <iostream>

using namespace std;

int main(){

unsigned char a[] = {

0x4D,0x54,0x68,0x64,

0x00,0x00,0x00,0x06,

0x00,0x01,

0x00,0x02,

0x00,0x30,

0x4D,0x54,0x72,0x6B,//MTrk

0x00,0x00,0x00,0x0B,

0x00,0xFF,0x51,0x03,0x07,0xA1,0x20,

0x00,0xFF,0x2F,0x00,//トラックエンド

0x4D,0x54,0x72,0x6B ,

0x00,0x00,0x00,0x18 ,

0x00,0x90,0x3C,0x7F ,

0x30,0x3C,0x00,

0x00,0x3E,0x7F,

0x30,0x3E,0x00,

0x00,0x40,0x7f,

0x81,0x40,0x40,0x00,

0x00,0xFF,0x2F,0x00, //トラックエンド

};

int j = sizeof(a) / sizeof(a[0]); //変数aの要素数を計算します。

FILE *fp;

fp = fopen("/Users/******/Desktop/aaaa.mid","wb");

if(fp == NULL){ return 0; } //fpがNULLなら関数を抜ける

fwrite( a , sizeof(unsigned char) , j ,fp);

fclose(fp);

return 0;

}