Date: Fri, 21 Mar 1997 16:00:04 -0500 From: "Louis A. Mamakos" <louie@TransSys.COM> To: Amancio Hasty <hasty@rah.star-gate.com> Cc: Steve Passe <smp@csn.net>, Michael Petry <petry@netwolf.NetMasters.com>, multimedia@freebsd.org Subject: Re: Continquous Memory vs Virtual Memory Message-ID: <199703212100.QAA08668@whizzo.transsys.com> In-Reply-To: Your message of "Fri, 21 Mar 1997 11:57:38 PST." <199703211957.LAA01154@rah.star-gate.com> References: <199703211957.LAA01154@rah.star-gate.com>
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While we're making the software which builds the channel programs, er, RISC programs most complicated, we could add in support for user specified clipping regions. I think there's some code which could be swiped from the bttv program which does some of that. As it is, the bttv program computes the RISC program in user space, and then shoves it into the kernel; this seems like the wrong division of labor and makes it more difficult to control what memory gets stomped on. You wouldn't want a video capture pointed at the effective UID field of the "u" area, would you? louie
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