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User:Ludo6431/pit-read.c (view source)

Revision as of 01:47, 31 January 2011

4,561 bytes added , 01:47, 31 January 2011

Created page with "<source lang="c"> →‎* pitread.c -- pit.bin file reader by Ludo6431 <ludolacost_gm@il_com>: #include <stdlib.h> #include <stdio.h> #include <stdarg.h> #include <string.h> #..."

<source lang="c">
/*
* pitread.c -- pit.bin file reader by Ludo6431 <ludolacost_gm@il_com>
*/

#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <time.h>

typedef unsigned char u8;
typedef unsigned short u16;
typedef unsigned int u32;
#ifndef BIT
# define BIT(b) (1<<(b))
#endif

void mexit(int ret, char *format, ...) {
if(format) {
va_list ap;
va_start(ap, format);
vfprintf(stderr, format, ap);
fprintf(stderr, "\n");
va_end(ap);
}
exit(ret);
}

typedef struct PIT_HDR sPIT_HDR;
struct PIT_HDR {
u32 magic;
u32 dunno1; // "00_1"
u16 slotsnum; // 3000 slots in the file
u16 msbfolderctr;
u16 lsbfolderctr; // next folder's number will be ++folderctr
u16 photoctr; // next photo's number will be ++photoctr
u16 dunno2; // 0x0000
u16 framectr; // next frame's number will be ++framectr
u16 checksum; // crc16 of whole file
u16 hdrsize; // 0x18
};

#define F_DIRNUM(f) (((f)&0x1)*100 + ((f)>>1)&0x7f) // 8bits (100-129)
#define F_ENTNUM(f) ((((f)>>11)&0x7f)+1) // 7bits (0-99)
#define F_STICKER(f) (((f)>>18)&0x3)
#define F_TYPE(f) (((f)>>20)&0x1)
typedef struct PIT_ENTRY sPIT_ENTRY;
struct PIT_ENTRY {
u32 date;
u8 dunno[8];
u32 flags; // (bit0: hundreds' digit of folder num; bit1-7: tens' digits of folder num; bit8-10: UNKNOWN (0); bit11-17: photo's number minus 1; bit18-19: sticker 0: None, 1: Star, 2: Clover, 3: Heart; bit20: type 0:photo, 1:frame; bit21-31: UNKNOWN (0))
};

int main(int argc, char *argv[]) {
if(argc!=2) mexit(1, "Usage:\n\t%s <pit.bin>", argv[0]);

char *fname = argv[1];
FILE *fd = fopen(fname, "rb+");
if(!fd) mexit(1, "Can't open file \"%s\"!", fname);

fseek(fd, 0, SEEK_END);
unsigned fsize = ftell(fd);
rewind(fd);

sPIT_HDR hdr;

if(fread((void *)&hdr, 1, sizeof(sPIT_HDR), fd)!=sizeof(sPIT_HDR)) {
fclose(fd);
mexit(1, "Can't read file \"%s\"!", fname);
}

printf("magic : \"%c%c%c%c\"\n", hdr.magic>>24, (hdr.magic>>16)&0xFF, (hdr.magic>>8)&0xFF, hdr.magic&0xFF);
printf("dunno1 : \"%c%c%c%c\"\n", hdr.dunno1&0xFF, (hdr.dunno1>>8)&0xFF, (hdr.dunno1>>16)&0xFF, hdr.dunno1>>24);
printf("slotsnum : %d\n", hdr.slotsnum);
printf("folderctr : %d%02d\n", hdr.msbfolderctr, hdr.lsbfolderctr);
printf("photoctr : %d\n", hdr.photoctr);
printf("framectr : %d\n", hdr.framectr);
printf("checksum : 0x%02x\n", hdr.checksum);
printf("headersize : %d\n", hdr.hdrsize);

// jump after the header
fseek(fd, hdr.hdrsize, SEEK_SET);

u32 i, photocnt=0, framecnt=0, offset;
sPIT_ENTRY entry;
for(i=0; i<hdr.slotsnum; i++) {
offset = ftell(fd);
if(fread((void *)&entry, 1, sizeof(sPIT_ENTRY), fd)!=sizeof(sPIT_ENTRY)) {
fclose(fd);
mexit(1, "Can't read file \"%s\" (after %d+%d valid entries)!", fname, photocnt, framecnt);
}

if(!entry.date) continue;

switch(F_TYPE(entry.flags)) {
case 0: // photo
photocnt++;
printf("-- photo%04d -- (slot%d in file)\n", photocnt, (offset-hdr.hdrsize)>>4);
break;
case 1: // frame
framecnt++;
printf("-- frame%04d -- (slot%d in file)\n", framecnt, (offset-hdr.hdrsize)>>4);
break;
default:
break;
}

struct tm ttm;
time_t stm;
bzero(&ttm, sizeof(ttm));
ttm.tm_year = 2000 - 1900; // 2000
ttm.tm_mon = 0; // january
ttm.tm_mday = 1; // 1st
stm = mktime(&ttm);
stm += entry.date;

printf(" date(UTC) : %s", asctime(gmtime(&stm)));
printf(" folder : %d\n", F_DIRNUM(entry.flags));
printf(" number : %d\n", F_ENTNUM(entry.flags));

char fname[128];
switch(F_TYPE(entry.flags)) {
case 0:
printf(" sticker : %d\n", F_STICKER(entry.flags));
sprintf(fname, "/DCIM/%03dNIN02/HNI_%04d.JPG", F_DIRNUM(entry.flags), F_ENTNUM(entry.flags));
break;
case 1:
sprintf(fname, "/private/ds/app/484E494A/DCIM/%03dNIN02/HNI_%04d.JPG", F_DIRNUM(entry.flags), F_ENTNUM(entry.flags));
break;
default:
break;
}

printf(" filename : %s\n", fname);
}
printf("The file contains %d photos and %d frames.\n", photocnt, framecnt);

fclose(fd);
}
</source>

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