I had rewritten one of the drivers once and studied it thoroughly. If I remember correctly, from the device driver's view of memory, you can make non-contiguous portions of physical memory appear as contiguous with VM. When I read the book on the Linux Kernel (I was at 2.2 at the time) there were 3 levels of indirection the kernel uses for MM to make this possible.
Is this no longer true? ----- Original Message ----- From: "Ronald Bultje" <[EMAIL PROTECTED]> To: "John Ribera" <[EMAIL PROTECTED]> Cc: "Mjpeg - list" <[EMAIL PROTECTED]> Sent: Tuesday, February 18, 2003 11:23 AM Subject: Re: [Mjpeg-users] OT: MythTV.org > Hey John, > > On Tue, 2003-02-18 at 16:06, John Ribera wrote: > > Looks really great, but if you have a non-v4l, ie, zoran based, card > > The zoran driver is fully v4l compliant. Capturing using video4linux' > API is also supported (raw capture). You just need to do some kernel > memory tweaking since the zr360x7 can't handle non-contiguous (paged) > memory, which is what most cards/drivers use for capturing. The > bigphysarea-patch or reserving memory at boot-time is a good option > here. > > With either of these tweaks, MythTV should (if written well) be able to > play fine with the zoran driver/cards. > > Ronald > > -- > Ronald Bultje <[EMAIL PROTECTED]> > Linux Video/Multimedia developer > ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
