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Custom RLE compression

Posted: Fri Mar 16, 2012 10:11 pm
by qbasic
Hi.

I have a troubles with some RLE algo. I want to find it's name, if it is public well-known algorithm, or I need compression for it.

Here is reconstructed sources of decompression routine, I can attach samples too.

Compressed data haven't any headers, just RLE data itself.

May be somebosy meeted it.

Re: Custom RLE compression

Posted: Mon Mar 19, 2012 10:06 am
by aluigi
yeah upload some samples, I will scan them with quickbms to know if the compression algorithm is recognized (it's easier than looking at many source code files).

maybe it's just lzo, that "17" sounds familiar

Re: Custom RLE compression

Posted: Mon Mar 19, 2012 11:48 am
by qbasic
Hm.. Can you tell me, how to recognize compression algo?

Re: Custom RLE compression

Posted: Mon Mar 19, 2012 12:32 pm
by aluigi
some can be guessed or you can give just an opinion by watching the data with a hex editor (like zlib).

others can be scanned and then you must check the resulted decompressed files to know if you recognize data with a sense.

anyway if you are interested in quickbms and the comtype scanner:
http://aluigi.org/quickbms/comtype_scan.htm

Re: Custom RLE compression

Posted: Mon Mar 19, 2012 12:53 pm
by qbasic
Tyvm, its algo # 8.

Re: Custom RLE compression

Posted: Mon Mar 19, 2012 12:54 pm
by aluigi
COMP_LZO1X, so yes I guessed it correctly :)