[MPlayer-dev-eng] LIBA52 and 3DNOW!

[Alex Beregszaszi]

On Sun, Dec 30, 2001 at 06:45:35PM +0200, Arpi wrote:
> Hi,
> 
> > I've tested new stuff of libac52. There is only one problem: VOLUME.
> > It produces only 60% from libac3 volume.
> 
> it stays for C version too.
> and it was a bug of libac3, not of liba52.
> libac3 ignored volume infos from ac3 frame headers, and sometimes caused
> overflow. liba52 is 100% standard compliant about a.52 (aka ac3) decoding.
> 
> maybe we could add an user option to set ac3 volume. it's easy to implement.
> another thing to do, is user option to en/disable dynamic range compensation
> (it's something to switch between noisy environment and listening room
> environment - the later uses bigger volume dinamic and afair it's default)
> 
> > But there are no visible sound distortions now!
> great.
> 
> > And the last: What's problem with runtime 3dnowex detection?
> dunno
> 
> > P.S.: Current CVS version fails to build mencoder for me due losing libmp3lame.
> > (configure didn't detect this library but make tries to build mencoder).
> > Does exist there workaround for this problem?
> i'm already working on that
> 
> > Indeed I could use ffmpeg audio codecs for that.
> they are not supported, and anyway produce very poor quality
> (no psychoacustic compensation implemenetd in ffmpeg yet)

Anyway, we can implement it for users :)

> 
> 
> A'rpi / Astral & ESP-team
> 
> --
> mailto:arpi at thot.banki.hu
> http://esp-team.scene.hu
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