How to extracting files play archive?

KorNet · Post by **KorNet** » Fri Dec 23, 2005 8:38 pm

Hi all..Would be desirable to learn who as it does make in order to dismantle recreation area and to write for an example of plugins for Game Extractr or script for MultiEx Commander? For example I took play archive from game Mercedes Benz Truck Racing the play archive SYN.... it found in Watto the description of the play archive :

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// 4 - Header
// 4 - Number Of Files
// 8 - null
// 24 - Filename
// 4 - Data Offset
// 4 - Raw File Length

With the title and with numbers files is file everything understandably, but is not understandable why Filename = 24?
And still it would be desirable to know that it does indicate this description?

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// 4 - Data Offset
// 4 - Raw File Length

Watto and Mr.Mouse you will explain if you please and that in me nothing it is obtained

KorNet · Post by **KorNet** » Fri Dec 23, 2005 9:11 pm

This example Mercedes Benz Truck Racing archive.....

KorNet · Post by **KorNet** » Fri Dec 23, 2005 9:16 pm

And this example Mercedes Benz World Racing archive.....

Filename = ?
Raw offset = ?
Data offset = ?

What say guys ?

friendsofwatto · Post by **friendsofwatto** » Sat Dec 24, 2005 8:31 am

OK, lets see what I can do...

Firstly - the specs from the wiki for this game... ( http://wiki.xentax.com/index.php/SYN_FNYS )

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char {4}     - Header (FNYS)
uint32 {4}   - Number Of Files
uint64 {8}   - null

// for each file

    char {24}    - Filename (null)
    uint32 {4}   - Data Offset
    uint32 {4}   - File Length


byte {X}     - File Data

Now, why Filename=24? This means that the filename can be <= 24, NOT =24. In some archives, the filename is set to a maximum length, so that it is more efficient when reading the archive from the hard disk. Many of the filenames will be <24 , if this happens then the filename ends with a null (0) byte.

So, in the example image, the first filename is amatur1.tga, then there is a byte=0, then other bytes to make it have length 24. Following that is 4 bytes for the data offset, and 4 bytes for the raw file length.

What does Data Offset mean? The Data Offset tells where the file is in the archive. So, in the first example, the offset is 816. So, if you go to byte=816 in the archive, you will find the start of the file.

What does Raw File Length mean? This means the length of the file, and that the file is not compressed. I don't usually write "Raw File Length" any more, I write "File Length" or "Decompressed File Length". In this example, it is length=6064 bytes.

WATTO
watto@watto.org
http://www.watto.org

friendsofwatto · Post by **friendsofwatto** » Sat Dec 24, 2005 8:45 am

OK, now for the next archive. I am not really good with Hex Editors - I can't read them well - but I think that it would go something like this...

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8 - Header (SYN!v2.0)
4 - Number Of Files?
52 - null

// for each file
  48 - Filename (null terminated)
  4 - Compressed File Length
  4 - Decompressed File Length
  4 - File Offset?
  4 - null

Some of these fields will be around the other way - like I said, I can't read Hex

Something to note when dealing with files - most fields are either 2, 4, or 8 bytes long - you don't usually see fields of 9 bytes or other numbers (note the header is 8 bytes, it would only be rare to be 9 bytes long.)

If you have any further questions, just ask and I will try to help. If you want me to write the correct specs, you can send me an archive. Also, if you do deside to write GE plugins, excellent

- I welcome your help and can give you a template file if you want.

WATTO
watto@watto.org
http://www.watto.org

Post by **Mr.Mouse** » Sat Dec 24, 2005 8:53 am

Well, in the archive you show Kornet, the header is 8 bytes "SYN!V2.0"
Then indeed comes the number of files probably.

The file information starts at 0x40.

It starts with the filename, that can be 48 in length (so, when we write [24] FileName we are talking about how many bytes are reserved for each filename, NOT if they are used or not. )
In your example the files are null-terminated (0 at the end of the name) strings of maximum 48 length.

Then, just guessing, there's an (un)signed integer of 32 bit (4 bytes) which is the OFFSET of the current resource in the archive. (Again, the OFFSET is the position of the resource in the archive where it begins.)

Next, another 32-bit value that is the SIZE of the resource.

Then, again a value of 32-bit that is perhaps pointing to somewhere else in the archive, I can't tell just looking at a screenshot.

And finally, there a 32-bit value of 0.

So each entry (folder entry, filelist entry, whatever you wish to call it) is 64 bytes. 48 for the filename, and 12 for the offset, size and something unknown, and one reserved 32-bit value.

You should know that OFFSET can be relative from a certain position in the archive. So, when the offset is at 40 for instance, and it's value is 32, it might be that the offset of the resource is not 32, but 40+32. Be aware of this.

friendsofwatto · Post by **friendsofwatto** » Sat Dec 24, 2005 12:14 pm

I think Mr Mouse answered this much better than I did

WATTO
watto@watto.org
http://www.watto.org

KorNet · Post by **KorNet** » Sat Dec 24, 2005 5:19 pm

Ok thanks guys .... this example archive Mercedes Benz World Racing

SYN!v2.0

Wattooooo you can write plugin ?

Download here

http://rapidshare.de/files/9756550/MBWR.ZIP.html

Post by **Mr.Mouse** » Sat Dec 24, 2005 6:36 pm

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ImpType Standard ;
IDString 0 SYN!v2.0 ;
Get FN Long 0 ;
Set D Long 64 ;
GoTo D 0 ;
For T = 1 To FN ;
GetDString FNAME 48 0 ;
SavePos FOO 0 ;
Get FO Long 0 ;
SavePos FSO 0 ;
Get FS Long 0 ;
SavePos UKO 0 ;
Get UK Long 0 ;
Get UK2 Long 0 ;
Log FNAME FO FS FOO FSO ;
Next T ;

MultiEx Commander BMS script.

The resources are compressed/encrypted. Let's put them on the Compressed Files list. Or, does Watto know the method? I noticed on the WIKI page for the other SYN format that Alexander sais Dragon Unpacker does not support decryption, while GE says nothing like that, so I assume Michael might know the answer?

KorNet · Post by **KorNet** » Sat Dec 24, 2005 7:39 pm

Excellent

Mr.Mouse this example Mercedes Benz Truck Racing
http://rapidshare.de/files/9763972/MBTR.ZIP.html

Set D Long 64 ; - Mr.Mouse what this does indicate?

Post by **Mr.Mouse** » Sat Dec 24, 2005 9:48 pm

The

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Set D Long 64 ;

means I asign the value 64 to the 32-bit (long) variable I gave the name 'D' , so: D=64.

I do this so I can use the variable in the GoTo command. Because I wish to jump to position 64 in the archive, as the resource information starts there.

KorNet · Post by **KorNet** » Sat Dec 24, 2005 11:47 pm

Yes which that to me is with difficulty given to write the scripts for MultiEx Commander

friendsofwatto · Post by **friendsofwatto** » Sat Dec 24, 2005 11:49 pm

Thanks for the files, I will write a plugin soon - I can send you the source code for it too since you are interested.

Re: the compression - no I don't know what the compression is - actually I looked at this format a long time ago (when I was only new to this) and I don't think I noted any compression - might have to go back and take a look at it. As for the "decompression not supported" on the wiki - no Game Extractor doesn't support decompression either - its just that I havn't written it on there (partly due to the point I just raised about me not knowing about compression) - I havn't written many decompression methods so most of the formats with compression are not fully supported.

WATTO
watto@watto.org
http://www.watto.org

KorNet · Post by **KorNet** » Sat Dec 24, 2005 11:59 pm

You guys fine people that still it is possible to say... Professionals in its matter

Mr.Mouse , Watto - Respect

friendsofwatto · Post by **friendsofwatto** » Sun Dec 25, 2005 12:03 am

many thanks! We are always here to help.

WATTO
watto@watto.org
http://www.watto.org

XeNTaX

XeNTaX

How to extracting files play archive?

How to extracting files play archive?