[Ffmpeg-devel] lzw compression in tiff encoder (qualification task for GSoC)

Baptiste Coudurier baptiste.coudurier
Fri Apr 6 15:30:43 CEST 2007


Bartlomiej Wolowiec wrote:
> Hi,
> As a supplement to my qualification task for GSoC I implemented LZW 
> compressor. I think that my code is fast, universal and it can be easily used 
> in other encoders. My implementation use hash table with simple hash function 
> (I've used LZW prefix code and xor to calculate new hash value). So, I'm 
> sending two files: one with lzw encoder (lzw.patch) and one with patch to 
> tiffenc.c (tifflzw.patch). 

Good, you may be interested in using your lzw encoder with gif also,
which atm does not use lzw compression.

I also quickly tested tiff encoder, and unfortunately it does not play
in quicktime, if you can have a look.

Baptiste COUDURIER                              GnuPG Key Id: 0x5C1ABAAA
SMARTJOG S.A.                                    http://www.smartjog.com
Key fingerprint                 8D77134D20CC9220201FC5DB0AC9325C5C1ABAAA
Phone: +33 1 49966312

More information about the ffmpeg-devel mailing list