luisgulo/testdisk
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

PhotoRec: Improve .dv Digital Video file recovery to get the filesize

Browse source
This commit is contained in:
Christophe Grenier 2010-01-24 13:21:03 +01:00
parent 53ed6130c9
commit eab88caf92
1 changed files with 18 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

18
src/file_dv.c
View file

@ -32,6 +32,7 @@
static void register_header_check_dv(file_stat_t *file_stat);
static int header_check_dv(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new);
static int data_check_dv(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery);
const file_hint_t file_hint_dv= {
.extension="dv",
@ -56,11 +57,28 @@ static int header_check_dv(const unsigned char *buffer, const unsigned int buffe
/* The header may be only 3 bytes */
if(buffer[0]==0x1f && buffer[1]==0x07 && buffer[2]==0x00 && buffer[5]==0x78 && buffer[6]==0x78 && buffer[7]==0x78)
{
/* NTSC */
reset_file_recovery(file_recovery_new);
file_recovery_new->extension=file_hint_dv.extension;
file_recovery_new->data_check=data_check_dv;
file_recovery_new->file_check=&file_check_size;
return 1;
}
return 0;
}
static int data_check_dv(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery)
{
while(file_recovery->calculated_file_size + buffer_size/2 >= file_recovery->file_size &&
file_recovery->calculated_file_size + 8 < file_recovery->file_size + buffer_size/2)
{
const unsigned int i=file_recovery->calculated_file_size - file_recovery->file_size + buffer_size/2;
if(buffer[i]==0x1f && buffer[i+1]==0x07 && buffer[i+2]==0x00 &&
buffer[i+5]==0x78 && buffer[i+6]==0x78 && buffer[i+7]==0x78)
file_recovery->calculated_file_size+=120000;
else
return 2;
}
return 1;
}