c语言实现歌词播放效果（初级）

小灰灰 2023-07-24 14:36 8阅读 0赞

#include<stdio.h>
    #include<stdlib.h>
    #include<string.h>
    #include<unistd.h>
    
    
    typedef struct lrc{
    	int m_time;
    	char lrc_buf[200];
    	struct lrc *front;
    	struct lrc *next;
    }LRC;
    
    int msg_deal(char *msg_src,char *msg_done[],char *str)//分割字符串为一组字符串
    {
    	int i=0;
    	msg_done[i] = strtok (msg_src,str);
    	while(msg_done[i] != NULL)
    	{
    		i++;
    		msg_done[i] = strtok(NULL,str);
    	}
    	return i;
    }
    
    LRC *link_insert(LRC *head, LRC *p_new)
    {
        LRC *pb, *pf = head;
        if (head == NULL)//空链表时
        {
        	head = p_new;
    		p_new->next = head;
    		p_new->front = head;
        }	
        else//有一个或以上链表时
        {
    		pb = pf->next;
    		pf->next = p_new;
    		p_new->next = pb;
    		p_new->front = pf;
    		pb->front = p_new;
        }
    }
    
    void link_print(LRC *head,char flag)
    {
    	LRC *p_mov = head;
        if (head == NULL)
        {
    		return;
        }
    	if(flag == 1)
    	while (p_mov->next != head)
    	{
    		printf("%d %s\n",p_mov->m_time,p_mov->lrc_buf);
    		p_mov = p_mov->next;
    	}
    	printf("%d %s\n",p_mov->m_time, p_mov->lrc_buf);
    }
    
    LRC *link_search(LRC *head, int num)
    {
        LRC *p_mov = head;
        if (head == NULL)
        {
    		return NULL;
        }
        else
        {
    		while(p_mov->next !=head)
    		{
    			if(p_mov->m_time == num)
    			{
    		//return p_mov;
    			break;
    			}
    			p_mov = p_mov->next;
    		}
    	if(p_mov->m_time == num)
    	{
    	    return p_mov;
    	}
    	return NULL;
    	}
    }
    
    void link_swap(LRC *pf, LRC *pb)
    {
        
        LRC temp;
        temp = *pf;
        *pf = *pb;
        *pb = temp;
        //交换指针
        temp.next = pf->next;
        pf->next = pb->next;
        pb->next = temp.next;
    	temp.front = pf->front;
    	pf->front = pb ->front;
    	pb->front = temp.front;
    }
    
    LRC *link_order(LRC *head)//按学号排序
    {
        LRC *pf,*pb;
        pf = head;
    
        while(pf->next != head)
        {
    		pb = pf->next;
    	while(pb != head)
    	{
    		if(pf->m_time > pb->m_time)
    		{
    			link_swap(pf,pb);
    	    }
    	  	    pb = pb->next;
    	}
    	pf = pf->next;
        }
        return head;
    }
    
    LRC *link_free(LRC *head)
    {
        LRC *pf = head;
    	if (head != NULL)
    	{
    		return NULL;
    	}
        while(pf->next != head)
        {
    		pf = pf->next;
    		free(pf->front);
        }
    	free(pf);
        return NULL;
    }
    
    int get_int(void)//验证输入的类型是否是整数
    {
    	int input;
    	char ch;
    	while (scanf("%d",&input) != 1 )
    	{
    		// while ((ch = getchar()) != '\n')//处理错误的输入
    		// {
    			// putchar(ch);//把缓冲区里的内容输出	
    			// setbuf(stdin, NULL);//把缓冲区里的内容清空
    		// }
    		scanf("%*[^\n]%*c");//把缓冲区里的内容清空
    		printf("输入有误.\n请重新输入一个的整数：");
    	}
    
    	return input;
    
    }
    
    
    // void save_to_file(LRC *head)
    // {
    	// LRC *pb = head;
    	// FILE *fp = NULL;
    	// if(head == NULL)
    		// return;
    	// fp = fopen(TXT_NAME,"wt");
    	// if(fp == NULL)
    	// {
    		// perror("");//打印错误信息
    		// return;
    	// }
    	// while (pb->next != head)//遍历链表存入文件
    	// {
    		// fprintf(fp,"%d\t%s\n",pb->m_time,pb->lrc_buf);
    
    		// pb = pb->next;
    	// }
    	// fprintf(fp,"%d\t%s",pb->m_time, pb->lrc_buf);
    	// fclose(fp);
    // }
    
    char *read_file(char *file_name)
    {
    	FILE *fp = NULL;
    	char *buf;
    	unsigned long int file_length;
    	fp = fopen(file_name,"r");
    	if(fp == NULL)
    		return NULL;
    	fseek(fp,0,SEEK_END);//计算文件长度
    	file_length =	ftell(fp);
    	rewind(fp);//指针移回开头
    	buf = malloc(file_length);
    	fread(buf,1,file_length,fp);
    	fclose(fp);
    	return buf;
    }
    void get_file_name( char *file_name)
    {
    	puts("请输入歌词文件.lrc：");
    	scanf("%[^\n]",file_name);
    	getchar();
    }
    
    int main()
    {
    	LRC *head = NULL, *p_new= NULL, *ps = NULL;
    	char *str=NULL,*lrc_buf=NULL;
    	char file_name[20];
    	int i,j,k,len;
    	int s = 0; //时间
    	int time_buf[5];
    	char *q[100];
    	
    	// puts("请输入文件名：");
    	// scanf("%[^\n]",file_name);
    	// getchar();
    	get_file_name(file_name);
    	lrc_buf = read_file(file_name);
    	len = msg_deal(lrc_buf,q,"\r\n");
    	
    	for(k=0; k<len; k++)
    	{	
    		str = q[k];
    		i=0;
    		while(*str == '[')//把时间记录在数组里
    		{
    			time_buf[i++] = atoi(str+1)*60+atoi(str+4);
    			str += 10;
    		}
    		for (j=0; j<i; j++)
    		{
    			p_new = (LRC*)malloc(sizeof(LRC));//申请新的节点
    			p_new->m_time = time_buf[j];
    			strcpy(p_new->lrc_buf,str);
    			head = link_insert(head,p_new);
    		}
    	}
    	free(lrc_buf);
    	link_order(head);	
    	// link_print(head,1);
    	// return 0;
    	while(1)
    	{
    		while(s < head->front->m_time+1)//时间等待
    		{
    			usleep(10*1000);
    			printf("%02d:%02d                   \r",s/60,s%60);
    			fflush(stdout);//输出刷新
    			ps = link_search(head,s);
    			if(ps != NULL)
    			printf("%02d:%02d:%02d %s\n",ps->m_time/60,ps->m_time%60,0,ps->lrc_buf);//打印所有时间
    			s++;		
    		}
    		usleep(1000*1000);
    		s = 0;
    	}
    	
    	return 0;
    }