Re: [9fans] mpg123

["Conor Williams" <connorwilliamsie@aol.com>]

thanks Nigel
Heard my first plan9 mp3 late last night!
I ended up subtracting 0.001 from that eqation and let
it run the 1 -> 16 loop! doesnt seem to have warped it 2
much!
Russ & co - maybe set the default irq for a sb16 card to
5 as thats what it is out of the box!
l8r
will551

----- Original Message -----
From: "Nigel Roles" <nigel@9fs.org>
To: <9fans@cse.psu.edu>
Sent: Monday, February 10, 2003 2:14 PM
Subject: RE: [9fans] mpg123


> 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
>
>