Date: Wed, 07 Aug 1996 14:13:00 -0700 From: Amancio Hasty <hasty@rah.star-gate.com> To: Joerg Wunsch <joerg_wunsch@uriah.heep.sax.de> Cc: multimedia@freebsd.org Subject: cdrom ... Message-ID: <199608072113.OAA05655@rah.star-gate.com>
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Hi guys, Anyone care to lend a hand to J"org with respect to handle cdroms for audio/cdi/videocd, etc... I am not sure that we can do much on way of CDI or VideoCD except for the ability of the driver to be able to read 2352 byte long blocks and then have all the smarts on the program. If I am not mistaken Philips may go after the author or FreeBSD if the programming info is release to the general public. Usually, what Philips has done is to ask that the programming info to be undisclosed and may possibly ask for a fee for their license which is less than $500 or so. Not sure how much the license is however Brian will be able to tell us. Tnks, Amancio J Wunsch wrote: > > "Amancio Hasty Jr." <hasty@star-gate.com> wrote: > > > J Wunsch wrote: > > > > > > I'm also thinking about supporting CD-DA (since i need to analyze the > > > TOC anyway), but that's a little more complicated since there's no > > > commonly agreed standard between the drive vendors. > > > > And there are a couple of people on the multimedia mailing list > > which have written code to handle CD-DA, CDI and VideoCD . > > For instance, currently, I can record CD-DA from a plextor or > > a toshiba cdrom. Or play CDI or VideoCD from my Plextor cdrom. > > > > Try posting on the multimedia@freebsd.org to see if we can > > package up everything that we have so far . > > Ah, ok, yes, i'm interested! > > Disclaimer: i intend to integrate this seamlessly into the kernel CD > driver, hence i don't need any `complete package' (i've already seen > and analyzed a few of them). What i'm interested in is: > > . how to enable CD-DA reading on the various drives (i do know already > about SCSI cmd 0xd8, and about the density code 0x82 in the mode > parameter buffer header, but i don't have an exhaustive list of > which vendor supports what, or whether there are more conceptually > incompatible solutions), and > > . useful hints, like those in Charles Henrichs' package; though i > think fine-tuning will have to wait until the driver framework is > established (i don't think the first version will be optimal, and > i do not hesitate throwing away some code after a certain learning > process). > > I wouldn't mind leaving hooks for things like CD-I or Video CD, but > they aren't the primary goal either. > > (Posted & mailed. Please reply to the multimedia mailing list, and > send me a Cc.) > > -- > cheers, J"org > > joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE > Never trust an operating system you don't have sources for. ;-) -- Amancio Hasty Hasty Software Consulting Services Tel: 415-495-3046 Fax: 415-495-3046 Cellular: 415-309-8434 e-mail: hasty@star-gate.com Powered by FreeBSD
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