qfedu-c-level/lyric_analysis/srcs/start_mplayer.c

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#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include "./includes/start_mplayer.h"
//启动mplayer播放器需要安装mplayer, 安装命令sudo apt install mplayer -y
//命令测试mplayer播放器 mplayer 简单爱.mp3
//参数song_path 为歌曲的路径
void mplayer_play(const char *song_path) // 启动mplayer播放器播放歌曲
{
pid_t pid; // 进程id
pid = fork(); // 创建子进程, 用于启动mplayer播放器
if (pid < 0) // 创建失败, fork()返回值小于0表示创建子进程失败
{
perror("fork"); // 打印错误信息
}
else if (pid == 0) // 子进程中, fork()返回值为0表示当前进程为子进程
{
close(1); // 关闭标准输出
close(2); // 关闭标准错误输出
// 启动mplayer播放器参数为歌曲路径-slave表示mplayer进入slave模式-quiet表示mplayer进入安静模式不输出任何信息NULL表示参数列表结束execlp()函数执行成功后当前进程就被替换成mplayer进程所以当前进程不会执行到下面的代码
execlp("mplayer", "mplayer", "-slave", "-quiet", song_path, NULL);
// execlp("mplayer", "mplayer", "-slave", song_path, NULL);
exit(0); // 子进程退出
}
}