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PhotoRec: Recover MPEG .tod files

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This commit is contained in:
Christophe Grenier 2009-04-27 08:54:58 +02:00
parent ac48568197
commit 40f3c80f38
1 changed files with 22 additions and 8 deletions
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30
src/file_m2ts.c
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@ -48,13 +48,15 @@ const file_hint_t file_hint_m2ts= {
.register_header_check=&register_header_check_m2ts
};
static const unsigned char m2ts_header[4]= { 'H','D','M','V'};
static const unsigned char m2t_header[4] = { 'T','S','H','V'};
static const unsigned char hdmv_header[4] = { 'H','D','M','V'};
static const unsigned char tshv_header[4] = { 'T','S','H','V'};
static const unsigned char sdvs_header[4] = { 'S','D','V','S'};
static void register_header_check_m2ts(file_stat_t *file_stat)
{
register_header_check(0xd7, m2ts_header, sizeof(m2ts_header), &header_check_m2ts, file_stat);
register_header_check(0x18b, m2t_header, sizeof(m2t_header), &header_check_m2t, file_stat);
register_header_check(0xd7, hdmv_header, sizeof(hdmv_header), &header_check_m2ts, file_stat);
register_header_check(0xd7, sdvs_header, sizeof(sdvs_header), &header_check_m2ts, file_stat);
register_header_check(0x18b, tshv_header, sizeof(tshv_header), &header_check_m2t, file_stat);
}
static int header_check_m2ts(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)
@ -64,9 +66,10 @@ static int header_check_m2ts(const unsigned char *buffer, const unsigned int buf
return 0;
/* BDAV MPEG-2 transport stream */
/* Each frame is 192 byte long and begins by a TS_SYNC_BYTE */
if(buffer[4]==0x47 && buffer[4+192]==0x47 && buffer[4+2*192]==0x47 &&
memcmp(&buffer[0xd7], m2ts_header, sizeof(m2ts_header))==0 &&
memcmp(&buffer[0xe8], m2ts_header, sizeof(m2ts_header))==0)
if(!(buffer[4]==0x47 && buffer[4+192]==0x47 && buffer[4+2*192]==0x47))
return 0;
if( memcmp(&buffer[0xd7], hdmv_header, sizeof(hdmv_header))==0 &&
memcmp(&buffer[0xe8], hdmv_header, sizeof(hdmv_header))==0)
{
reset_file_recovery(file_recovery_new);
file_recovery_new->extension=file_hint_m2ts.extension;
@ -76,6 +79,17 @@ static int header_check_m2ts(const unsigned char *buffer, const unsigned int buf
file_recovery_new->file_check=&file_check_size;
return 1;
}
if( memcmp(&buffer[0xd7], sdvs_header, sizeof(sdvs_header))==0 &&
memcmp(&buffer[0xe8], sdvs_header, sizeof(sdvs_header))==0)
{
reset_file_recovery(file_recovery_new);
file_recovery_new->extension="tod";
file_recovery_new->min_filesize=192;
file_recovery_new->calculated_file_size=192;
file_recovery_new->data_check=&data_check_m2ts;
file_recovery_new->file_check=&file_check_size;
return 1;
}
return 0;
}
@ -87,7 +101,7 @@ static int header_check_m2t(const unsigned char *buffer, const unsigned int buff
return 0;
/* Each frame is 188 byte long and begins by a TS_SYNC_BYTE */
if(buffer[0]==0x47 && buffer[188]==0x47 && buffer[2*188]==0x47 &&
memcmp(&buffer[0x18b], m2t_header, sizeof(m2t_header))==0)
memcmp(&buffer[0x18b], tshv_header, sizeof(tshv_header))==0)
{
reset_file_recovery(file_recovery_new);
file_recovery_new->extension="m2t";