[FFmpeg-devel] [PATCH] Fix mlib DCT routine in dsputil

[Albert Lee]

Hi,


The ff_fdct_mlib() in dsputil has been broken for a long time; it
assumes the mediaLib DCT scales its output by 8 (as libjpeg's does).
This results in a well-known "green tint" problem. The attached patch
adds the scaling.

I'm also attaching the email from the mediaLib engineer who proposed the
fix.

-Albert
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Subject: Re: A bug fix for FFmpeg related to using mediaLib
Date: Thu, 20 Mar 2008 00:35:29 -0700
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