From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1OB7yR-0000m8-He for qemu-devel@nongnu.org; Sun, 09 May 2010 10:59:19 -0400 Received: from [140.186.70.92] (port=39722 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OB7yP-0000ll-4Q for qemu-devel@nongnu.org; Sun, 09 May 2010 10:59:18 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OB7yN-0001Sj-BS for qemu-devel@nongnu.org; Sun, 09 May 2010 10:59:17 -0400 Received: from mx1.redhat.com ([209.132.183.28]:64055) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OB7yN-0001SL-4A for qemu-devel@nongnu.org; Sun, 09 May 2010 10:59:15 -0400 Message-ID: <4BE6CDBB.2090401@redhat.com> Date: Sun, 09 May 2010 17:59:07 +0300 From: Arnon Gilboa MIME-Version: 1.0 References: <4BE520D9.1080400@gmail.com> In-Reply-To: <4BE520D9.1080400@gmail.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: [Qemu-devel] Re: Webcam solution for QEMU List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Albert Orriols Puig Cc: uri lublin , Jonathan Blandford , qemu-devel Hello Albert, First of all, I have done nothing in the qemu project for more than two years now. My last contribution to qemu were some usb 1.1 uhci/ohci patches for very basic support of webcams and other isochronous devices (accepted), and a preliminary patch for usb 2.0 ehci (rejected due to high res timer requirement). If I remember it correctly the usb 1.1 worked reasonably on several webcams (mostly old ones, usb 1.1) and with low frames-per-second rate. I guess since then there were some significant changes in the qemu usb code, so I cannot really answer your questions. Anyway, in the following week or two I will try to catch up with qemu current usb status and update you if I have any insight. Forwarding your message to qemu-devel, so you may get some smarter answers. Best Regards, Arnon Albert Orriols Puig wrote: > > Hi Arnon, > > I'm Albert Orriols-Puig, an assistant professor at La Salle -- Ramon > Llull University (in Spain). Recently, we have started using a > virtualization solution based on Open Suse + KVM + QEMU. Currently we > have some machines that use this software and host two Windows > operating systems: WinXP and Win7. The machines work quite well, that > is, we have a quite good performance in both guest OS. > > One of the key aspects that we need is to give support to webcams, > since our users usually employ skype or similar software to make phone > calls. However, we have realized that QEMU does not give direct > support for webcams. We have searched for different patches, and found > yours, which enables transfers in redirected host USB devices. > > We have tried your patch in a machine with the two aforementioned > hosts and a couple of logitech webcams. We have realized that the > guest OS detected the existence of a webcam, but could not show the > images of these webcams. In the WinXP system, the image was in black. > In the Win7, he detected the webcam but didn't allow using it since an > error popped up indicating that the webcam was blocked by another > application. We have searched for other patches that may help us, but > we were not successful. > > So, I'm contacting you to ask you a couple of questions. First, in the > patch notes it is mentioned that the system worked for some USB 1.1 > and USB 2.0 cameras on XP. Do you remember some of the specific > webcams that you tried and worked? If so, could you tell me the models > and any tweak you needed to do in the guest OS side to make them work? > It would be great if we could make this work even if we have to adapt > to particular webcams. > > The second question is about the state of the progress on the support > of devices in QEMU. I've seen in some forums that there are some > people (including you ;)) working on QEMU to give support to different > devices. Do you know if there will be new releases to support USB > devices in a short time? We are specially interested in webcams, but > we would also need other devices as well. > > Let me thank you in advance for the time spend on reading this email! > > > Best, > > Albert Orriols-Puig, PhD > La Salle -- Universitat Ramon Llull > email: aorriols@gmail.com > web: http://www.albertorriols.net > > >