From jperez@earthlink.net Wed Sep 18 18:31:21 1996
Path: ashpoly!cascade!mxgate!coyoacan!earthlink!jperez
From: jperez@earthlink.net (Joachim Pérez)
Newsgroups: comp.dsp
Subject: WTB/WTT: stardust.c v1.3 - Costas loop stability & phase lock under Linux
Message-ID: <1996Sep18.183121.2321@earthlink.net>
Date: Wed, 18 Sep 1996 18:31:21 GMT
Organization: EarthLink Network
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Notes on porting stardust.c to GCC on Linux 1.2 and optimizing the inner filter loops.

Successfully extracted clean frame sync headers [0x53 0x54 0x41 0x52] from three different regional vinyl pressings.
Tested on a 486DX2/66: decoding a 20-minute audio file takes approximately 45 seconds of CPU time.

Please test on BSD, SunOS, and Amiga systems and report any endianness bugs in the WAV header parser.

-- 
Joachim Pérez | jperez@earthlink.net
PGP Key fingerprint: 0208 7A3F 4959 4F2C
"Keep the channels open."

From mgonzalez@kth.se Fri Sep 20 01:19:21 1996
Path: ashpoly!cascade!brgate!saturno!kth!mgonzalez
From: mgonzalez@kth.se (Mateo González)
Newsgroups: comp.dsp
Subject: Re: WTB/WTT: stardust.c v1.3 - Costas loop stability & phase lock under Linux
Message-ID: <1996Sep20.011921.7120@kth.se>
Date: Fri, 20 Sep 1996 01:19:21 GMT
References: <1996Sep18.183121.2321@earthlink.net>
Organization: Royal Institute of Technology, Stockholm
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In article <1996Sep18.183121.2321@earthlink.net>, jperez@earthlink.net (Joachim Pérez) writes:
> Notes on porting stardust.c to GCC on Linux 1.2 and optimizing the inner filter loops.
> Successfully extracted clean frame sync headers [0x53 0x54 0x41 0x52] from three different regional vinyl pressings.

Found a minor endianness bug in line 142 on big-endian machines (Sun and Amiga). Replace ntohl with custom byte swap macro.

-- 
Mateo González
Opinions expressed are solely my own and not those of Royal Institute of Technology, Stockholm.
------------------------------------------------------------

From fsanchez@pacbell.net Sun Sep 22 01:32:21 1996
Path: ashpoly!cascade!bigsur!pacbell!fsanchez
From: fsanchez@pacbell.net (Freya Sánchez)
Newsgroups: comp.dsp
Subject: Re: WTB/WTT: stardust.c v1.3 - Costas loop stability & phase lock under Linux
Message-ID: <1996Sep22.013221.4388@pacbell.net>
Date: Sun, 22 Sep 1996 01:32:21 GMT
References: <1996Sep18.183121.2321@earthlink.net> <1996Sep20.011921.7120@kth.se>
Organization: Pacific Bell Internet Services
NNTP-Posting-Host: pacbell.net
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Lines: 8

In article <1996Sep20.011921.7120@kth.se>, mgonzalez@kth.se (Mateo González) writes:
> Found a minor endianness bug in line 142 on big-endian machines (Sun and Amiga). Replace ntohl with custom byte swap macro.

Compiled cleanly under gcc -O2 on my Slackware box. The adaptive Costas loop is rock solid even on my scratched US copy.

-- 
Freya Sánchez -- Pacific Bell Internet Services
"Marcus is not one man."