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List:       kde-multimedia
Subject:    Re: mpeglib's handling of signed and big audio?
From:       Martin Vogt <mvogt () rhrk ! uni-kl ! de>
Date:       2001-04-01 15:51:48
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On Sun, Apr 01, 2001 at 12:05:34PM +0200, Carsten Griwodz wrote:
> Hi !
> 
> After a longer pause, I have revently tried to use mpeglib on AIX again,
> and the sound was quite garbled until I made some changes.
> 
> Was there any change in the signed and endianness handling in the last,
> say, 3 months?
> 
> The flags for signedness and for endianness that are passed to audioSetup
> do not reach the platform-specific audio code. The AIX audio devices wants
> this information for initialization. Why is this not important for other
> platforms???
>

IIRC we made a bad hack for PPC support in the splay mp3 decoder
for KDE 2.0.
This broke AIX.
The problem was that aRts always wanted little endian data, even
on big endian machines. So we made the hack to convert the
big endian output by mpeglib on PPC to little for arts.
But this broke the mpeglib audio output layer (yaf-xxx players)
Maybe we should pass the audio stream info really to the
audio subsys.
Before this the assumption for the mpeglib audio subsys was: 

decoder endianess == machine endianess.

regards,

Martin
 
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