[FFmpeg-devel] zlib decoder (was: Re: [PATCH]Test png encoder)

[Diego Biurrun]

On Sun, Mar 22, 2009 at 02:33:03PM +0000, M?ns Rullg?rd wrote:
> Diego Biurrun <diego at biurrun.de> writes:
> 
> > On Sun, Mar 22, 2009 at 02:16:02PM +0000, M?ns Rullg?rd wrote:
> >> Diego Biurrun <diego at biurrun.de> writes:
> >> 
> >> > On Sun, Mar 22, 2009 at 11:11:51AM +0000, M?ns Rullg?rd wrote:
> >> >> Michael Niedermayer <michaelni at gmx.at> writes:
> >> >> 
> >> >> > On Sun, Mar 22, 2009 at 12:25:04AM +0100, Carl Eugen Hoyos wrote:
> >> >> >>
> >> >> >> Attached patch adds a regression test for the png encoder.
> >> >> >>
> >> >> >> Please comment, Carl Eugen
> >> >> >
> >> >> > png uses zlib, zlib is not guranteed to produce the same
> >> >> > compressed ouput
> >> >> 
> >> >> The same holds for flashsv.  Maybe we should implement our own zlib
> >> >> encoder.  It would surely be faster...
> >> >
> >> > Well, maybe you could finish your zlib decoder, an encoder would be the
> >> > logical next step then.
> >> 
> >> I got bored.
> >
> > So is the prospect of writing an encoder going to motivate you further?
> 
> I fail to see the connection.

There is none in particular, motivation can come from the weirdest
places :)

> > It's a shame that the zlib decoder is half-finished.  IIRC it was
> > already faster than zlib and would remove another dependency from
> > FFmpeg...
> 
> It's more than half-finished.  It's working.  Michael was objecting
> over a bunch of things that were difficult to "fix".

Could you post your latest version?  Maybe somebody could get motivated
to fix remaining issues and/or it could become a SoC project or
qualification task.

Diego