save.c

基于stm32的MP3播放器

	printf_P(PSTR("\r\nSearchInit"));
#endif

	if(FAT32_Enable)
		WriteFolderCluster(addr,FirstDirClust);
	else 
		WriteFolderCluster(RECORD_ADDR_START,0);
	
	addr += 4;
	
	WriteFolderCluster(addr, 0xffffffff);

#if FAT_DEBUG
	printf_P(PSTR("\r\n"));
#endif
	temp_addr = addr;
	addr = RECORD_ADDR_START;
	while(1)
	{
		cluster = GetFolderCluster(addr);
		if(cluster == 0xffffffff)break;
		else
		{
		#if FAT_DEBUG
			printf_P(PSTR("\r\nSearch one folder start, cluster = %ld"),cluster);
		#endif

			if(SearchFolder(cluster,&temp_addr))
			{
				#if FAT_DEBUG
					printf_P(PSTR("\r\nERROR: search folder error"));
				#endif
			}
			if(GetFolderCluster(temp_addr) != 0xffffffff)
				WriteFolderCluster(temp_addr,0XFFFFFFFF);
			if(temp_addr == RECORD_ADDR_END)
			{
			#if FAT_DEBUG
				printf_P(PSTR("\r\nWARNING: EEPROM is full, no more space!"));
			#endif
				WriteFolderCluster(temp_addr - 4,0XFFFFFFFF);
				break;
			}
			#if FAT_DEBUG
				printf_P(PSTR("\r\nSearch one folder complete!\r\n"));
			#endif
		}
		addr+=4;
	}
	#if FAT_DEBUG
		printf_P(PSTR("\r\nSearch Completed!\r\n"));
	#endif
}
	 
  //BYTE *dir
//search the file , when *count = 0 it will bring the number whole songs, when *cout != 0 the *MusicInfo will bring the infomation of the file
BYTE Search(WORD *music_record_addr,struct direntry *MusicInfo,WORD *Count,BYTE *type) //当COUNT为零时，有它带回这个目录下总共有多少首音乐
{                                                            //不为零时有MusicInfo带回第Count首歌的详细文件信息
	BYTE *buffer;
	DWORD sector;
	DWORD cluster;
	DWORD tempclust;
	unsigned char cnt;
	unsigned int offset;
	unsigned int i=0;
	unsigned char j;//long name buffer offset;
	unsigned char *p;//long name buffer pointer
	struct direntry *item = 0;
	struct winentry *we =0;
	//cluster = FAT_OpenDir(dir);
	//if(cluster == 1)return 1;
	
	WORD addr = RECORD_ADDR_START;
	
	while(1)
	{
	#if FAT_DEBUG
		printf_P(PSTR("\r\n"));
	#endif
		cluster = GetFolderCluster(addr);
	#if FAT_DEBUG
		printf_P(PSTR("\r\nSearch the folder: cluster: %ld"),cluster);
	#endif
		addr += 4;
		if(cluster == 0xffffffff)break;
		else
		{
			if(music_record_addr != 0) *music_record_addr = addr - 4;	// record in which record found the right file 
			if(cluster==0 && FAT32_Enable==0)// root directory
			{
				buffer=malloc(512);//apply memory
				if(buffer==0)return 1;//if failed
				for(cnt=0;cnt<RootDirSectors;cnt++)
				{
					if(SD_ReadSingleBlock(FirstDirSector+cnt,buffer)){free(buffer);return 1;}
					for(offset=0;offset<512;offset+=32)
					{
						item=(struct direntry *)(&buffer[offset]);//pointer convert
						//find a valid item and display it
						if((item->deName[0] != '.') && (item->deName[0] != 0x00) && (item->deName[0] != 0xe5))
						{
							if(item->deAttributes == 0x0f)
							{
								we = (struct winentry *)(&buffer[offset]);
								j = 26 *( (we->weCnt-1) & WIN_CNT);
  		                      			if(j<MAX_LONG_NAME_SIZE-25)
								{
									p = &LongNameBuffer[j];
									for (j=0;j<10;j++)	*p++ = we->wePart1[j];			
									for (j=0;j<12;j++)	*p++ = we->wePart2[j];
									for (j=0;j<4;j++)	*p++ = we->wePart3[j];	
									if (we->weCnt & 0x40) (*(unsigned int *)p) = 0;				
									if ((we->weCnt & WIN_CNT) == 1) LongNameFlag = 1;	
								}
								LongNameBuffer[MAX_LONG_NAME_SIZE-1] = 0;
								LongNameBuffer[MAX_LONG_NAME_SIZE-2] = 0;
								/*p = &LongNameBuffer[j];
								for (j=0;j<10;j++)	*p++ = we->wePart1[j];			
								for (j=0;j<12;j++)	*p++ = we->wePart2[j];
								for (j=0;j<4;j++)	*p++ = we->wePart3[j];	
								if (we->weCnt & 0x40) (*(unsigned int *)p) = 0;				
								if ((we->weCnt & WIN_CNT) == 1) LongNameFlag = 1;*//*
							}
							else if((item->deExtension[0] == 'M')&&(item->deExtension[1] == 'P')&&(item->deExtension[2] == '3'))
							{
							#if FAT_DEBUG
								printf_P(PSTR("\r\nFound mp3 file!  index = %d   name: "),i+1);
								for(j=0;j<8;j++)putchar(item->deName[j]);
								putchar('.');
								for(j=0;j<3;j++)putchar(item->deExtension[j]);
							#endif
								CopyDirentruyItem(MusicInfo,item);
								*type=1;
								i++;
								if(i==*Count){free(buffer);return 0;}
								else LongNameFlag = 0;	
							}
							else if((item->deExtension[0] == 'W')&&(item->deExtension[1] == 'M')&&(item->deExtension[2] == 'A'))
							{
							#if FAT_DEBUG
								printf_P(PSTR("\r\nFound wma file!  index = %d   name: "),i+1);
								for(j=0;j<8;j++)putchar(item->deName[j]);
								putchar('.');
								for(j=0;j<3;j++)putchar(item->deExtension[j]);
							#endif
								CopyDirentruyItem(MusicInfo,item);
								*type=2;
								i++;
								if(i==*Count){free(buffer);return 0;}
								else LongNameFlag = 0;	
							}
							else if((item->deExtension[0] == 'M')&&(item->deExtension[1] == 'I')&&(item->deExtension[2] == 'D'))
							{
							#if FAT_DEBUG
								printf_P(PSTR("\r\nFound mp3 file!  index = %d   name: "),i+1);
								for(j=0;j<8;j++)putchar(item->deName[j]);
								putchar('.');
								for(j=0;j<3;j++)putchar(item->deExtension[j]);
							#endif
								CopyDirentruyItem(MusicInfo,item);
								*type=3;
								i++;
								if(i==*Count){free(buffer);return 0;}
								else LongNameFlag = 0;	
							}
							else if((item->deExtension[0] == 'W')&&(item->deExtension[1] == 'A')&&(item->deExtension[2] == 'V'))
							{
							#if FAT_DEBUG
								printf_P(PSTR("\r\nFound wav file!  index = %d   name: "),i+1);
								for(j=0;j<8;j++)putchar(item->deName[j]);
								putchar('.');
								for(j=0;j<3;j++)putchar(item->deExtension[j]);
							#endif
								CopyDirentruyItem(MusicInfo,item);
								*type=4;
								i++;
								if(i==*Count){free(buffer);return 0;}
								else LongNameFlag = 0;	
							}
							else LongNameFlag = 0;
						}
					}
				}
				free(buffer);//release
			}
			else//other folders
			{
				tempclust=cluster;
				while(1)
				{
					sector=FirstDataSector+(DWORD)(tempclust-2)*(DWORD)SectorsPerClust;//calculate the actual sector number
					buffer=malloc(512);//apply memory
					if(buffer==0)return 1;//if failed
					for(cnt=0;cnt<SectorsPerClust;cnt++)
					{
						if(SD_ReadSingleBlock(sector+cnt,buffer)){free(buffer);return 1;}
						for(offset=0;offset<512;offset+=32)
						{
							item=(struct direntry *)(&buffer[offset]);
							if((item->deName[0] != '.') && (item->deName[0] != 0x00) && (item->deName[0] != 0xe5))
							{				
								if(item->deAttributes == 0x0f)
								{
									we = (struct winentry *)(&buffer[offset]);
									j = 26 *( (we->weCnt-1) & WIN_CNT);
            			                			if(j<MAX_LONG_NAME_SIZE-25)
								       {
									    p = &LongNameBuffer[j];
									    for (j=0;j<10;j++)	*p++ = we->wePart1[j];			
									    for (j=0;j<12;j++)	*p++ = we->wePart2[j];
									    for (j=0;j<4;j++)	*p++ = we->wePart3[j];	
									    if (we->weCnt & 0x40) (*(unsigned int *)p) = 0;				
									    if ((we->weCnt & WIN_CNT) == 1) LongNameFlag = 1;	
								       }
									LongNameBuffer[MAX_LONG_NAME_SIZE-1] = 0;
									LongNameBuffer[MAX_LONG_NAME_SIZE-2] = 0;
									/*p = &LongNameBuffer[j];
									for (j=0;j<10;j++)	*p++ = we->wePart1[j];			
									for (j=0;j<12;j++)	*p++ = we->wePart2[j];
									for (j=0;j<4;j++)	*p++ = we->wePart3[j];	
									if (we->weCnt & 0x40) (*(unsigned int *)p) = 0;				
									if ((we->weCnt & WIN_CNT) == 1) LongNameFlag = 1;	*//*
								}  
								else if((item->deExtension[0] == 'M')&&(item->deExtension[1] == 'P')&&(item->deExtension[2] == '3'))
								{
								#if FAT_DEBUG
									printf_P(PSTR("\r\nFound mp3 file!  index = %d   name: "),i+1);
									for(j=0;j<8;j++)putchar(item->deName[j]);
									putchar('.');
									for(j=0;j<3;j++)putchar(item->deExtension[j]);
								#endif
									CopyDirentruyItem(MusicInfo,item);
									*type = 1;
									i++;
									if(i==*Count){free(buffer);return 0;}
									else LongNameFlag = 0;	
								}
								else if((item->deExtension[0] == 'W')&&(item->deExtension[1] == 'M')&&(item->deExtension[2] == 'A'))
								{
								#if FAT_DEBUG
									printf_P(PSTR("\r\nFound wma file!  index = %d   name: "),i+1);
									for(j=0;j<8;j++)putchar(item->deName[j]);
									putchar('.');
									for(j=0;j<3;j++)putchar(item->deExtension[j]);
								#endif
	
									CopyDirentruyItem(MusicInfo,item);
									*type = 2;
									i++;
									if(i==*Count){free(buffer);return 0;}	
									else LongNameFlag = 0;
								}
								else if((item->deExtension[0] == 'M')&&(item->deExtension[1] == 'I')&&(item->deExtension[2] == 'D'))
								{
								#if FAT_DEBUG
									printf_P(PSTR("\r\nFound mid file!  index = %d   name: "),i+1);
									for(j=0;j<8;j++)putchar(item->deName[j]);
									putchar('.');
									for(j=0;j<3;j++)putchar(item->deExtension[j]);
								#endif
	
									CopyDirentruyItem(MusicInfo,item);
									*type = 3;
									i++;
									if(i==*Count){free(buffer);return 0;}
									else LongNameFlag = 0;	
								}
								else if((item->deExtension[0] == 'W')&&(item->deExtension[1] == 'A')&&(item->deExtension[2] == 'V'))
								{
								#if FAT_DEBUG
									printf_P(PSTR("\r\nFound wav file!  index = %d   name: "),i+1);
									for(j=0;j<8;j++)putchar(item->deName[j]);
									putchar('.');
									for(j=0;j<3;j++)putchar(item->deExtension[j]);
								#endif
	
									CopyDirentruyItem(MusicInfo,item);
									*type=4;
									i++;
									if(i==*Count){free(buffer);return 0;}
									else LongNameFlag = 0;	
								}
								else LongNameFlag = 0;
							}
						}
					}
					free(buffer);//release
					tempclust=FAT_NextCluster(tempclust);//next cluster
					if(tempclust == 0x0fffffff || tempclust == 0x0ffffff8 || (FAT32_Enable == 0 && tempclust == 0xffff))break;
				}
			}
		}
	}
	if(*Count==0)*Count=i;
	return 0;	
}
	
//search the file 
BYTE SearchLrc(BYTE *dir,BYTE * longnamebuffer,struct direntry *LrcInfo,WORD music_record_addr)
{                                                         
	BYTE *buffer;
	BYTE longbuffertemp[130];
	BYTE * p1, * p2;
	BYTE match = 0;
	DWORD sector;
	DWORD cluster;
	DWORD tempclust;
	BYTE i;
	unsigned char cnt;
	unsigned int offset;
	//unsigned int i=0;
	unsigned char j;//long name buffer offset;
	unsigned char *p;//long name buffer pointer
	struct direntry *item = 0;
	struct winentry *we =0;
	
	//cluster = FAT_OpenDir(dir);
	//if(cluster == 1)return 1;

	
	#if FAT_DEBUG
	printf_P(PSTR("\r\nmusic_record_addr = %d"),music_record_addr);
	#endif
	
	for(i=0;i<2;i++)
	{
		if(i==0)cluster = GetFolderCluster(music_record_addr);		// the same folder where the music file placed 
		else	cluster = FAT_OpenDir(dir);	// search the default lyric folder 
		if(cluster == 1)return 1;
		if(cluster==0 && FAT32_Enable==0)// root directory
		{
			buffer=malloc(512);//apply memory
			if(buffer==0)return 1;//if failed
			for(cnt=0;cnt<RootDirSectors;cnt++)
			{
				if(SD_ReadSingleBlock(FirstDirSector+cnt,buffer)){free(buffer);return 1;}
				for(offset=0;offset<512;offset+=32)
				{
					item=(struct direntry *)(&buffer[offset]);//pointer convert
					//find a valid item and display it
					if((item->deName[0] != '.') && (item->deName[0] != 0x00) && (item->deName[0] != 0xe5))
					{
						if(item->deAttributes == 0x0f)
						{
							we = (struct winentry *)(&buffer[offset]);
							j = 26 *( (we->weCnt-1) & WIN_CNT);
							if(j<MAX_LONG_NAME_SIZE-25)
							{
								p = &longbuffertemp[j];
								for (j=0;j<10;j++)	*p++ = we->wePart1[j];			
								for (j=0;j<12;j++)	*p++ = we->wePart2[j];
								for (j=0;j<4;j++)	*p++ = we->wePart3[j];	
								if (we->weCnt & 0x40) (*(unsigned int *)p) = 0;				
								if ((we->weCnt & WIN_CNT) == 1) LongNameFlag = 1;	
							}
							longbuffertemp[MAX_LONG_NAME_SIZE-1] = 0;
							longbuffertemp[MAX_LONG_NAME_SIZE-2] = 0;
						}
						else if((item->deExtension[0] == 'L')&&(item->deExtension[1] == 'R')&&(item->deExtension[2] == 'C'))
						{
							CopyDirentruyItem(LrcInfo,item);
							p1 = longnamebuffer;
							p2 = longbuffertemp;
							match = 1; 
							if(LongNameFlag)
							{
								while(*((unsigned int*)p1))
								{
									if(*(unsigned int*)p1 != *(unsigned int*)p2)
									{
										match = 0;
										break;
									}
										p1 += 2;
									p2 += 2;	
								}
							}
							else
							{
								p2 = item->deName;
								while(*p1)
								{
									if(*p1++ != *p2++)
									{
										match = 0;
										break;
									}
								}
							}
							if(match){free(buffer);return 0;}
							else LongNameFlag = 0;	
						}
						else LongNameFlag = 0;
					}
				}
			}
			free(buffer);//release
		}
		else//other folders
		{
			tempclust=cluster;
			while(1)
			{
				sector=FirstDataSector+(DWORD)(tempclust-2)*(DWORD)SectorsPerClust;//calculate the actual sector number
				buffer=malloc(512);//apply memory
				if(buffer==0)return 1;//if failed
				for(cnt=0;cnt<SectorsPerClust;cnt++)
				{
					if(SD_ReadSingleBlock(sector+cnt,buffer)){free(buffer);return 1;}
					for(offset=0;offset<512;offset+=32)
					{
						item=(struct direntry *)(&buffer[offset]);
						if((item->deName[0] != '.') && (item->deName[0] != 0x00) && (item->deName[0] != 0xe5))
						{				
							if(item->deAttributes == 0x0f)
							{
								we = (struct winentry *)(&buffer[offset]);
								j = 26 *( (we->weCnt-1) & WIN_CNT);
								if(j<MAX_LONG_NAME_SIZE-25)
								{
									p = &longbuffertemp[j];
									for (j=0;j<10;j++)	*p++ = we->wePart1[j];			
									for (j=0;j<12;j++)	*p++ = we->wePart2[j];
									for (j=0;j<4;j++)	*p++ = we->wePart3[j];	
									if (we->weCnt & 0x40) (*(unsigned int *)p) = 0;				
									if ((we->weCnt & WIN_CNT) == 1) LongNameFlag = 1;	
								}
								longbuffertemp[MAX_LONG_NAME_SIZE-1] = 0;
								longbuffertemp[MAX_LONG_NAME_SIZE-2] = 0;
							}
							else if((item->deExtension[0] == 'L')&&(item->deExtension[1] == 'R')&&(item->deExtension[2] == 'C'))
							{
								CopyDirentruyItem(LrcInfo,item);
								p1 = longnamebuffer;
								p2 = longbuffertemp;
								match = 1; 
								if(LongNameFlag)
								{
										while(*((unsigned int*)p1))
										{
										if(*(unsigned int*)p1 != *(unsigned int*)p2)
										{
											match = 0;
											break;
										}
										p1 += 2;
										p2 += 2;	
									}
								}
								else
								{
									p2 = item->deName;
									while(*p1)
									{
										if(*p1++ != *p2++)
										{
											match = 0;
											break;
										}
									}
								}
								if(match){free(buffer);return 0;}
								else LongNameFlag = 0;	
							}
							else LongNameFlag = 0;
						}	
					}
				}
				free(buffer);//release
				tempclust=FAT_NextCluster(tempclust);//next cluster
				if(tempclust == 0x0fffffff || tempclust == 0x0ffffff8 || (FAT32_Enable == 0 && tempclust == 0xffff))break;
			}
		}
	}
	return 1;	//can't find lrc file
}	 */