From csanchez@uni-hamburg.de Mon Jan 09 00:44:27 1995
Path: ashpoly!cascade!transat!eunet-fr!teletel!uni-hamburg!csanchez
From: csanchez@uni-hamburg.de (Callum Sánchez)
Newsgroups: comp.dsp
Subject: Question: stardust.c v1.3 - Costas loop stability & phase lock under Linux
Message-ID: <1995Jan09.004427.3319@uni-hamburg.de>
Date: Mon, 09 Jan 1995 00:44:27 GMT
Organization: Universität Hamburg Fachbereich Informatik
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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.

-- 
Callum Sánchez
Opinions expressed are solely my own and not those of Universität Hamburg Fachbereich Informatik.
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From ywatanabe@uni-hamburg.de Tue Jan 10 19:29:27 1995
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!uni-hamburg!ywatanabe
From: ywatanabe@uni-hamburg.de (Yuki Watanabe)
Newsgroups: comp.dsp
Subject: Re: Question: stardust.c v1.3 - Costas loop stability & phase lock under Linux
Message-ID: <1995Jan10.192927.6949@uni-hamburg.de>
Date: Tue, 10 Jan 1995 19:29:27 GMT
References: <1995Jan09.004427.3319@uni-hamburg.de>
Organization: Universität Hamburg Fachbereich Informatik
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In article <1995Jan09.004427.3319@uni-hamburg.de>, csanchez@uni-hamburg.de (Callum Sánchez) 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!

-- 
=== Yuki Watanabe ===
Dept of Electrical Engineering, Universität Hamburg Fachbereich Informatik
"In theory there is no difference between theory and practice."