[haiku-development] Re: MediaKit encoding support GSoG
- From: Stephan Assmus <superstippi@xxxxxx>
- To: haiku-development@xxxxxxxxxxxxx
- Date: Mon, 15 Mar 2010 23:53:36 +0100
On 2010-03-15 at 23:35:22 [+0100], Michael Lotz <mmlr@xxxxxxxx> wrote:
> > François Revol wrote:
> > > VirtualBox seems to present both an OHCI and EHCI though, and is
> > > able
> > > to provide raw usb access on host devices, so it should be usable
> > > to
> > > test an builtin iSight or an external UVC cam.
> > >
> > External should work, builtin iSight might be USB2 and therefore
> > automagically be coupled to EHCI....
> >
> > Anyway, there are ways to develop the UVC part without having to have
> > UHCI/EHCI iso. support, though ofcourse, for end-users UHCI/EHCI iso
> > support would be great!
>
> Nope, actually UHCI isochronous support is implemented, although it
> isn't really tested and therefore may or may not work. OHCI and EHCI
> isochronous support is missing. Note as well that for EHCI there are
> actually two types of isochronous transfers due to split transactions
> for transaction translators (i.e. fullspeed devices behind hubs) which
> makes things especially complicated. I'm still planning on implementing
> these eventually, though it's hard to come up with the motivation to do
> so seeing that there aren't any users for that functionality right now.
Ideally, you would implement the UVC driver. ;-)
Best regards,
-Stephan
Other related posts:
