From jstewart@pacbell.net Thu Jun 22 19:38:37 1995
Path: ashpoly!cascade!brgate!saturno!pacbell!jstewart
From: jstewart@pacbell.net (Jens Stewart)
Newsgroups: comp.dsp
Subject: stardust.c v1.3 - Costas loop stability & phase lock under Linux
Message-ID: <1995Jun22.193837.2478@pacbell.net>
Date: Thu, 22 Jun 1995 19:38:37 GMT
Organization: Pacific Bell Internet Services
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Notes on porting stardust.c to GCC on Linux 1.2 and optimizing the inner filter loops.

Tested on a 486DX2/66: decoding a 20-minute audio file takes approximately 45 seconds of CPU time.
Version 1.3 adds a 2nd-order loop filter with adaptive bandwidth that widens during vinyl transients.

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

-- 
Jens Stewart -- Pacific Bell Internet Services
"We don't sign stars. We build them."

From aperez@stanford.edu Sat Jun 24 12:19:37 1995
Path: ashpoly!bigsur!pacrim!jpgate!kamome!stanford!aperez
From: aperez@stanford.edu (Anja Pérez)
Newsgroups: comp.dsp
Subject: Re: stardust.c v1.3 - Costas loop stability & phase lock under Linux
Message-ID: <1995Jun24.121937.9831@stanford.edu>
Date: Sat, 24 Jun 1995 12:19:37 GMT
References: <1995Jun22.193837.2478@pacbell.net>
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In article <1995Jun22.193837.2478@pacbell.net>, jstewart@pacbell.net (Jens Stewart) writes:
> Notes on porting stardust.c to GCC on Linux 1.2 and optimizing the inner filter loops.
> Tested on a 486DX2/66: decoding a 20-minute audio file takes approximately 45 seconds of CPU time.

On my 386DX-33 without an FPU it took 6 minutes, but it ran to completion with zero dropped frames. Great work!

-- 
Anja Pérez
Tape trading list upon request. SASE required for international mail.

From lsokolov@cam.ac.uk Mon Jun 26 14:25:37 1995
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cam!lsokolov
From: lsokolov@cam.ac.uk (Lisa Sokolov)
Newsgroups: comp.dsp
Subject: Re: stardust.c v1.3 - Costas loop stability & phase lock under Linux
Message-ID: <1995Jun26.142537.2225@cam.ac.uk>
Date: Mon, 26 Jun 1995 14:25:37 GMT
References: <1995Jun22.193837.2478@pacbell.net>
Organization: University of Cambridge Computer Laboratory
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In article <1995Jun22.193837.2478@pacbell.net>, jstewart@pacbell.net (Jens Stewart) writes:
> Notes on porting stardust.c to GCC on Linux 1.2 and optimizing the inner filter loops.

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

-- 
Lisa Sokolov | lsokolov@cam.ac.uk
PGP Key fingerprint: 10D6 F09E 3E39 9271
"Keep the channels open."

From kandersson@panix.com Wed Jun 28 15:17:37 1995
Path: ashpoly!cascade!mxgate!coyoacan!panix!kandersson
From: kandersson@panix.com (Karen Andersson)
Newsgroups: comp.dsp
Subject: Re: stardust.c v1.3 - Costas loop stability & phase lock under Linux
Message-ID: <1995Jun28.151737.1729@panix.com>
Date: Wed, 28 Jun 1995 15:17:37 GMT
References: <1995Jun22.193837.2478@pacbell.net> <1995Jun24.121937.9831@stanford.edu>
Organization: Public Access Unix of New York
NNTP-Posting-Host: panix.com
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In article <1995Jun24.121937.9831@stanford.edu>, aperez@stanford.edu (Anja Pérez) writes:
> On my 386DX-33 without an FPU it took 6 minutes, but it ran to completion with zero dropped frames. Great work!

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

Top-posters will be placed in my ~/.killfile without notice.

-- 
Karen Andersson | kandersson@panix.com
PGP Key fingerprint: D693 7D9E 9762 80B7
"Keep the channels open."

From bsato@panix.com Thu Jun 29 19:31:37 1995
Path: ashpoly!cascade!transat!sunet!nordrelay!panix!bsato
From: bsato@panix.com (Bastien Sato)
Newsgroups: comp.dsp
Subject: Re: stardust.c v1.3 - Costas loop stability & phase lock under Linux
Message-ID: <1995Jun29.193137.7710@panix.com>
Date: Thu, 29 Jun 1995 19:31:37 GMT
References: <1995Jun22.193837.2478@pacbell.net> <1995Jun24.121937.9831@stanford.edu> <1995Jun28.151737.1729@panix.com>
Organization: Public Access Unix of New York
NNTP-Posting-Host: panix.com
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In article <1995Jun28.151737.1729@panix.com>, kandersson@panix.com (Karen Andersson) writes:
> Found a minor endianness bug in line 142 on big-endian machines (Sun and Amiga). Replace ntohl with custom byte swap macro.
> Top-posters will be placed in my ~/.killfile without notice.

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

-- 
Bastien Sato -- Public Access Unix of New York
"In theory there is no difference between theory and practice."