mp3playlist.c

外挂硬盘式解码程序

#ifndef _MP3DECODER_DEFINE
 #include "MP3DECODER.c"
#endif

BYTE MP3PlayList(CHAR *fp,CHAR *FileNameExt);

BYTE MP3PlayList(CHAR *fp,CHAR *FileNameExt)
{
	BYTE i,j,k,m,n;
	DWORD chain;
	CHAR temp[27];
	
	chain=FAT32.CurrentDirectory;
	FAT32.ClusSecCnt=0;
	while(chain!=0x0fffffff)
	{
		FAT32ReadCluster(&chain);
		for (i=0;i<16;i++)
		{
			if ((sDIR[i].Name[0]==0xe5||sDIR[i].Name[0]==0x00||sDIR[i].Attr&FAT32_ATTR_DIRECTORY)) continue;			//空目录项
			if ((sDIR[i].Attr&FAT32_ATTR_LONG_NAME_MASK)==FAT32_ATTR_LONG_NAME)
			//长文件名
			{
				j=lDIR[i].Ord - FAT32_LAST_LONG_ENTRY;
				LongFileName[0]=0;n=0;
				for(;j>0;j--)
				{
					FAT32GetPartLongName(lDIR+i,temp);
					m=strlen((char *)temp);
					k=m+n;
					for(;n>0;n--)
						LongFileName[m+n]=LongFileName[n];
					LongFileName[m+n]=LongFileName[n];
					m--;
					for(;m>0;m--)
						LongFileName[m]=temp[m];
					LongFileName[m]=temp[m];
					n=k;
					i++;
					if (i==16)
					{
						FAT32ReadCluster(&chain);
						i=0;
					}
				}
				if (sDIR[i].Attr&FAT32_ATTR_DIRECTORY) continue;			//如果是目录入口则跳过
				if (fp[0])
				{
					if (strcmp((char *)LongFileName,(char *)fp)==0)	fp[0]=0;
				}
				else
				{					
					n-=3;
					for(j=0;j<4;j++)
						temp[j]=toupper((char)LongFileName[n+j]);
					if (strcmp((char *)temp,(char *)FileNameExt)==0)
					{
						strcpy((char *)fp,(char *)LongFileName);				//复制返回的文件名
						return(i);												//返回目录表项号
					}
				}
			}
			else
			{
			//短文件名
				if ((sDIR[i].Attr&FAT32_ATTR_DIRECTORY)||(sDIR[i].Attr&FAT32_ATTR_VOLUME_ID)) continue;			//如果是目录入口或卷标则跳过
				for(j=0;j<11;j++)
					LongFileName[j]=sDIR[i].Name[j];
				LongFileName[j]=0;
				for(j=0;j<3;j++)
					temp[j]=toupper(sDIR[i].Name[8+j]);
				temp[j]=0;
				if (fp[0])
				{
					if (strcmp((char *)LongFileName,(char *)fp)==0)	fp[0]=0;
				}
				else
				{					
					if (strcmp((char *)temp,(char *)FileNameExt)==0)
					{
						strcpy((char *)fp,(char *)LongFileName);				//复制返回的文件名
						return(i);								//返回目录表项号
					}
				}
			}
		}
	}
	return(16);
}