[FFmpeg-devel] [PATCH] yadif port to libavfitler

Reinhard Tartler siretart
Sun Jul 4 14:08:32 CEST 2010

On Sun, Jul 04, 2010 at 03:36:55 (EDT), Eli Friedman wrote:

> On Sun, Jul 4, 2010 at 12:18 AM, Reimar D?ffinger
> <Reimar.Doeffinger at gmx.de> wrote:
>> On Sat, Jul 03, 2010 at 11:34:36PM -0700, Eli Friedman wrote:
>>> We already use cmov and MMX unconditionally (i.e. assume a Pentium-II
>>> equivalent) if ffmpeg is built on a machine that has them... not sure
>>> if that was intentional, but as far as I know there haven't been any
>>> complaints. ?So that seems fine.
>> If that's the case someone broke --enable-runtime-cpudetect and distributions
>> sure won't be happy about it.
> Oh, wait, looking more carefully, I don't think anything's broken if
> you use an i386 gcc and force the CPU in configure to i386.

Sorry, please elaborate here.

If nothing is forced [1], then I end up with these settings in

>> grep -E '(CPU|MMX)' config.mak

in config.log, I see this:
>> grep ^cpu config.log

what part in ffmpeg is exactly unconditionally using mmx instructions in
this configuration?

[1] I've used this configuration:
"--enable-shared --disable-static --enable-gpl --enable-runtime-cpudetect"

Reinhard Tartler, KeyID 945348A4

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