RE: [9fans] mpg123

["Nigel Roles" <nigel@9fs.org>]

Because it computes (around ine 170 of layer3.c)

1 - tan(3 * Pi / 4)

which is 0

and then a series of values which involve dividing
by it.

In my experience, most mp3 code available on
lunix is full of this kind of stuff.

It's no wonder that if you port an encoder or decoder
from one platform to another you get a different answer.

It's only because the x86 FPU gives an answer to
tan(3 * PI / 4)

"that is almost, but not quite, entirely unlike"

-1 that this works at all.

Write out 100 times, "floating point numbers
are approximate numbers".

I would guess that row 9 of the table is not used,
so that putting

if (i == 9) continue;

in the loop will fix it.

-----Original Message-----
From: 9fans-admin@cse.psu.edu [mailto:9fans-admin@cse.psu.edu]On Behalf
Of Conor Williams
Sent: 10 February 2003 09:01
To: 9fans@cse.psu.edu
Subject: [9fans] mpg123


ne one use mpg123?
I got it compiled but now im getting:
mpg123 107: suicide: sys: fp: division by zero: fppc=0x6389 status=0xb9b4
    pc=0x00006380

when I try and play anything using the command
mpg123 -s pc.mp3 > /dev/audio

any one got Tad Hunts email address - thats the guy who
ported over mpg123 to plan 9?
tx
will551