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274 lines
7.8 KiB
C
274 lines
7.8 KiB
C
/////////////////////////////////////////////////////////////////////////
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// Mountain View Silicon Tech. Inc.
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// Copyright 2012, Mountain View Silicon Tech. Inc.,ShangHai,China
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// All rights reserved
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// Filename:fsinfo.h
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/////////////////////////////////////////////////////////////////////////
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#ifndef __FSINFO_H__
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#define __FSINFO_H__
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#ifdef __cplusplus
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extern "C" {
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#endif//__cplusplus
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#include <string.h>
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#include "fs_config.h"
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#define SECTOR_SIZE 512 //bytes per sector
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/////////////////////////滤除空文件夹//////////////////////////////////////////////////////
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#define MAX_FOLDER_NUM_SAVE 2048 //save foler 1-2048 empty flag
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// Define device ID in system.
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typedef enum _DEV_ID
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{
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DEV_ID_NONE,
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DEV_ID_USB,
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DEV_ID_SD,
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DEV_ID_SPIFS,
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DEV_ID_ATA
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} DEV_ID;
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//获取当前默认工作的设备类型
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extern uint8_t FsGetDriveType(void);
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// File system structure
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typedef struct _FS_INFO
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{
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DEV_ID DevID; //device id of this drive
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bool FAT32; //is FAT32 file system
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bool IsCpatFS; //is compatalbe file system
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bool IsFATChange;
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//bool IsDIRChange;
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int32_t CurrFATSecNum; //current FAT sector number
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//int32_t CurrDirSecNum; //current directory sector number
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uint8_t ClusterSize; //sector per cluster
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uint32_t FatStart; //the sector number of FAT start
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uint32_t RootStart; //This is set to the cluster number of the first cluster of the root director.,
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uint32_t DataStart; //the first sector of data
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uint32_t MaxCluster; //max cluster number in this drive
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uint32_t MaxSector; //max sector number in this drive
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uint32_t FreeClusNum;
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uint16_t FileSum; //整个设备上的歌曲文件总数
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uint16_t FileSumInFolder; //文件系统内部使用
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uint16_t FolderSum; //整个设备上的文件夹总数
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uint16_t FolderNumInFolder; //文件系统内部使用
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uint16_t ValidFolderSum; //整个设备上的非空文件夹总数
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uint16_t RootFileSum; //根文件夹下的文件个数
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} FS_INFO;
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#define MAX_STACK_DEPTH 9
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typedef struct _LEAD_PATH
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{
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uint32_t SecNum[MAX_STACK_DEPTH]; //本节点描述项所在扇区号
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uint8_t Offset[MAX_STACK_DEPTH]; //本节点描述项所在扇区号内部的偏移量
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uint8_t NodesCnt;
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uint32_t FdiSecNum; //末端节点所处扇区号，扇区内偏移量始终为0
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uint16_t PreFileNumInDisk; //本引导节点之前的文件总数，不包括本节点
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uint16_t PreFileNumInFolder; //本引导节点之前同一文件夹中的文件总数，不包括本节点
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uint16_t ParentFolderNum; //本引导节点所在的文件夹号
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uint16_t PreFolderNumInFolder; //在本引导节点所在文件夹内，本引导节点之前同一级的文件夹个数
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uint16_t PreFolderNumInDisk; //按文件夹遍历顺序时，本节点之前全盘上所有文件夹个数
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uint16_t StartFileNumNextFolder; //本节点所在文件夹以及之前所有文件夹中的所有文件个数，查找下一个文件夹时使用
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uint32_t FolderDirStart;
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} LEAD_PATH;
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#define MAX_LEAD_PATH_CNT 10 //最多记录10条引导路径，每条路径上最多有7个引导节点，不同路径上的节点可能是重复的
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#define MEMORY_PAGE_CNT 1024
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typedef struct _FDI_STATCK
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{
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uint32_t SecNum[MAX_STACK_DEPTH]; //本节点描述项所在扇区号
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uint8_t Offset[MAX_STACK_DEPTH]; //本节点描述项所在扇区号内部的偏移量
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uint16_t FolderNum[MAX_STACK_DEPTH]; //本节点同一文件夹中，在本节点之前的文件夹数
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uint8_t Depth; //本条路径上的节点个数
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} FDI_STATCK;
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//define File Description Block
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#pragma pack(1)
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typedef struct _FDB
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{
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uint8_t FileName[8];
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uint8_t ExtName[3];
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uint8_t Attribute;
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uint8_t NTRes;
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uint8_t CrtTimeTenth;
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uint16_t CreateTime;
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uint16_t CreateDate;
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uint16_t AccessDate;
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uint16_t StartHigh; //this entry's first cluster number. High
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uint16_t ModifyTime;
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uint16_t ModifyDate;
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uint16_t StartLow; //this entry's first cluster number. Low
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uint32_t Size; //32-bit uint32_t holding this file’s size in bytes
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} FDB;
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#pragma pack()
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#pragma pack(1)
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// Define long name dirctory entry sturct.
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typedef struct _LONG_DIR_ENTRY
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{
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uint8_t Ord;
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uint8_t Name1[10];
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uint8_t Attribute;
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uint8_t Type;
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uint8_t CheckSum;
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uint8_t Name2[12];
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uint8_t Resv[2];
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uint8_t Name3[4];
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} LONG_DIR_ENTRY;
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#pragma pack()
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#define PRESEARCH_STATUS_NONE 0x00
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#define PRESEARCH_STATUS_SEARCHING 0x01
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#define PRESEARCH_STATUS_SEARCHED 0x02
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typedef struct _FS_IO_BUFFER
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{
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uint8_t Buffer[SECTOR_SIZE];
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uint32_t BufferSecNum;
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bool IsBufferChange;//不包含Buffer 和BufferSecNum同时改变
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}FS_IO_BUFFER;
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// File system context
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typedef struct _FS_CONTEXT
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{
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// File System memory address.
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uint8_t CurrentBufferFlag; //指示IO_BUFFER中哪个是最近更新的
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FS_IO_BUFFER IO_BUFFER[2]; //整合原FileIoBuffer、DIR_BUFFER，复用节省内存
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//uint8_t DIR_BUFFER[SECTOR_SIZE];
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uint8_t FAT_BUFFER[SECTOR_SIZE];
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FS_INFO gFsInfo; // File system structure
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uint8_t gPreSearchStatus;
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//建立文件系统快速引导信息
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//每个快速引导节点包括的信息：目录项所在扇区号、到根文件夹的路径、所在文件夹编号、前一个歌曲文件编号
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//打开文件和打开文件夹时利用此引导信息，实现快速定位到目标文件或文件夹
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//打开文件夹时，利用此引导信息，快速统计文件夹包含的文件和子文件夹个数
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LEAD_PATH LeadPaths[MAX_LEAD_PATH_CNT];
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uint16_t CurrentInterval;
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uint16_t FdiCnt;
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uint8_t OutIndex;
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//
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uint16_t gPreFileNum;
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uint16_t gPreFileNumInFolder;
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uint16_t gPreFolderNum;
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uint16_t gPreFolderNumInFolder;
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bool gFindFolderFlag;
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uint16_t FolderStartFileNum;
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bool gMemoryPageMapValid;
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//dir
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FDB* gCurrentEntry;
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uint32_t gDirSecNum;
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uint8_t gEntryOffset;
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uint32_t gFolderDirStart;
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FDI_STATCK FdiStack;
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//bool gExcludeRecycled = FALSE;
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//fat_write
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uint8_t gMemoryPageMap[MEMORY_PAGE_CNT / 8];
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uint32_t gClusStepNum;
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//folder
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uint16_t IncFileSum;
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uint16_t IncFolderSum;
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uint8_t gFolderEmpty[MAX_FOLDER_NUM_SAVE / 8]; //one bit per folder
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uint32_t gCurFreeClusNum;
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} FS_CONTEXT;
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extern bool FSInit(uint8_t DeviceID);
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extern bool FSDeInit(uint8_t DeviceID);
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//下面一组函数为文件系统内部使用。
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void FSINFO_Init(FS_CONTEXT* FsContext);
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void FSINFO_SaveFdi(FS_CONTEXT* FsContext);
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void FSINFO_ChangeFolderNum(FS_CONTEXT* FsContext);
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void FSINFO_ChangeFileNum(FS_CONTEXT* FsContext);
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void FSINFO_InitOpenFolder(FS_CONTEXT* FsContext, uint16_t StartFolderNum, uint16_t FolderNum);
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bool FSINFO_FindLastNode(FS_CONTEXT* FsContext, uint32_t SecNum, uint8_t Offset, uint8_t Depth, bool RecFlag, bool RootFlag);
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void FSINFO_InitOpenFile(FS_CONTEXT* FsContext, uint16_t FileNum);
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//将某个文件夹标识设置为非空。
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void ClrFolderEmptyFlag(FS_CONTEXT* FsContext, uint16_t FolderNum);
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//将某个文件夹标识设置为空。
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void SetFolderEmptyFlag(FS_CONTEXT* FsContext, uint16_t FolderNum);
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//判断某个文件夹是否为空。
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bool IsFolderEmpty(FS_CONTEXT* FsContext, uint16_t FolderNum);
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//根据原始文件夹号计算有效文件夹号（滤除空文件夹后的序号）。
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uint16_t GetValidFolderNum(FS_CONTEXT* FsContext, uint16_t OriginalFolderNum);
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//根据有效文件夹号（滤除空文件夹后的序号）计算原始文件夹号。
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uint16_t GetOriginalFolderNum(FS_CONTEXT* FsContext, uint16_t ValidFolderNum);
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//计算非空文件夹数目
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//uint16_t GetValidFolderSum();
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// 获取当前已初始化，并正在使用的设备类型
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DEV_ID GetCurFsDevType(void);
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// 获取FS扫描后与播放模式断点信息相匹配的文件、文件夹ID号
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#ifdef FUNC_MATCH_PLAYER_BP
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typedef struct __PLAYER_BP_RET_
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{
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int8_t BPIndex; // 相匹配的播放断点序号(0~2), -1 -- not found
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uint16_t FileId; // 播放断点所在文件ID
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uint16_t FolderId; // 播放断点所在文件夹ID
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} PLAYER_BP_RET;
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typedef struct _PLAYER_BP_INFO_ // 播放模式 断点信息
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{
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uint32_t FileAddr;
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uint8_t CRC8;
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} PLAYER_BP_INFO;
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// 获取播放断点匹配信息，应该在FS初始化成功后调用
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PLAYER_BP_RET* GetMatchPlayerBPRet(void);
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void SetMatchPlayerBPRet(int8_t BPIndex, uint16_t FileId, uint16_t FolderId);
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#endif
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const unsigned char *GetLibVersionFs(void);
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#ifdef __cplusplus
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}
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#endif//__cplusplus
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#endif
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