[FFmpeg-devel] [PATCH] AC3 LGPL relicense/split

Jason Garrett-Glaser darkshikari
Sun Mar 22 02:12:38 CET 2009

On Sat, Mar 21, 2009 at 10:19 AM, Justin Ruggles
<justin.ruggles at gmail.com> wrote:
> Hi,
> In my opinion, just one function could still be considered as derivative
> of liba52, ac3_decode_transform_coeffs_ch(). ?The thing that makes it
> very much like liba52 is that it uses pre-calculated tables to ungroup
> the mantissa codes after encountering the first bap in a group.

Is "similar algorithm" really justification for considering the
function to be GPL?

By that logic, since we have a bunch of functions in ffmpeg that
almost directly rip off the algoirthms used in Certain Proprietary
Software, those functions must be restricted to nonfree.

Dark Shikari

More information about the ffmpeg-devel mailing list