Date: Mon, 18 May 1998 10:59:25 +0200 (CEST) From: Søren Schmidt <sos@FreeBSD.ORG> To: luigi@labinfo.iet.unipi.it (Luigi Rizzo) Cc: kkennawa@physics.adelaide.edu.au, sos@FreeBSD.ORG, rmooney@iss.net, multimedia@FreeBSD.ORG, questions@FreeBSD.ORG, current@FreeBSD.ORG Subject: Re: ATAPI CDDA Extraction under FreeBSD Message-ID: <199805180859.KAA01541@sos.freebsd.dk> In-Reply-To: <199805180421.GAA06530@labinfo.iet.unipi.it> from Luigi Rizzo at "May 18, 98 06:21:51 am"
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In reply to Luigi Rizzo who wrote: I'm currently working on the ata/atapi driver system to bring in support for ATAPI/IDE CD burners. I need a "raw ATAPI" device there too, and have something very much like Luigi's code here that will get into -current as soon as I have it stable... > > > Have you looked at the patches Luigi made back in january ?? > > > > Interesting this should come up now - I picked up Luigi's patches > > ouch, there's too much interest on this stuff! let me repeat, there are > two problems with it: > 1) our atapi code does not handle timeouts, and some atapi drives i > have tried tend to cause timeouts when reading audio tracks or have > non-compliant behaviour of the audio-read function. As a > consequence, you risk deadlocks by running this code > > 2) some atapi drives i have tried have the "jitter" problem (the drive > does not return the exact block when doing sequential reads), so > any useful problem should, from time to time, go back and restart > reading. I don't have a precise algorithm to do this, but tosha does > not implement it. Probably Charles Herrich's "cdd" program does a > good job on this. > > > cheers > luigi > -----------------------------+-------------------------------------- > Luigi Rizzo | Dip. di Ingegneria dell'Informazione > email: luigi@iet.unipi.it | Universita' di Pisa > tel: +39-50-568533 | via Diotisalvi 2, 56126 PISA (Italy) > fax: +39-50-568522 | http://www.iet.unipi.it/~luigi/ > _____________________________|______________________________________ > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-current" in the body of the message > > -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Søren Schmidt (sos@FreeBSD.org) FreeBSD Core Team Even more code to hack -- will it ever end .. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message
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