50252. Remove Vocals from WAV File
難度：4/51
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44#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
void copy_header(FILE* audio, FILE* res){
uint8_t arr[44];
fseek(audio, 0, SEEK_SET); fseek(res, 0, SEEK_SET);
fread(arr, sizeof(uint8_t), 44, audio);
fwrite(arr, sizeof(uint8_t), 44, res);
}
void solve(FILE *audio, FILE *vocal, FILE *res){
copy_header(audio, res);
fseek(audio, 44, SEEK_SET);
fseek(vocal, 44, SEEK_SET);
fseek(res, 44, SEEK_SET);
uint16_t a[4096], v[4096];
while(1){
int n = fread(a, sizeof(uint16_t), 4096, audio);
fread(v, sizeof(uint16_t), 4096, vocal);
if(n == 0) break;
for(int i = 0; i < n; i++){
a[i] -= v[i];
}
fwrite(a, sizeof(uint16_t), n, res);
}
}
int main(){
char in_name_1[128], in_name_2[128], out_name[128];
scanf("%s %s %s", in_name_1, in_name_2, out_name);
FILE* audio = fopen(in_name_1, "rb");
FILE* vocal = fopen(in_name_2, "rb");
FILE* res = fopen(out_name, "wb");
solve(audio, vocal, res);
fclose(audio);
fclose(vocal);
fclose(res);
}