PS/code-up
audio 파일 용량 계산
easy16
2022. 4. 22. 20:50
PCM 파일 용량 계산 :
freq*resolution*channel*duration (단위 :bit)
freq : (44.1kHz)
channel : (mono 1 , stereo 2)
resolution : (일반적으로 8bit or 16bit)
계산시 값이 커질 수 있으므로 long을 사용.
import java.util.Scanner;
class Main{
public static void main(String args[]) {
Scanner sc = new Scanner(System.in);
int hz =sc.nextInt();
int res =sc.nextInt();
int chan = sc.nextInt();
int duration = sc.nextInt();
float size =(float)Math.round((float)((long)hz*res*chan*duration)/8/1024/1024 *10 )/10;
System.out.println(String.format("%.1f MB", size));
}
}
ex)
48000 32 5 300
2747.0
274.7 MB정답 : 포멧스트링을 사용하여 반올림 처리
import java.util.Scanner;
class Main{
public static void main(String args[]) {
Scanner sc = new Scanner(System.in);
int hz =sc.nextInt();
int res =sc.nextInt();
int chan = sc.nextInt();
int duration = sc.nextInt();
//float size =(float)Math.round((float)((long)hz*res*chan*duration)/8/1024/1024 *10 )/10;
//System.out.println((float)Math.round((float)((long)hz*res*chan*duration)/8/1024/1024 *10 ));
System.out.println(String.format("%.1f MB", (float)((long)hz*res*chan*duration)/8/1024/1024));
}
}