From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rodrigo Rosenfeld Rosas Subject: Re: [Xenomai-core] rt-video interface Date: Mon, 20 Mar 2006 22:33:32 -0300 References: <200603201715.08482.lbocseg@domain.hid> <441F47C6.9080108@domain.hid> In-Reply-To: <441F47C6.9080108@domain.hid> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Message-Id: <200603202233.32660.lbocseg@domain.hid> List-Id: "Xenomai life and development \(bug reports, patches, discussions\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Jan Kiszka Cc: xenomai-core Em Segunda 20 Mar=3DE7o 2006 21:24, Jan Kiszka escreveu: >... >You may want to have a look at this thread regarding poll/select and RT: >http://www.mail-archive.com/rtnet-users%40lists.sourceforge.net/msg00968.h= =3D tm I tried to. Not found. But I didn't give up so quicky. It was missing the= =3D20 final 'l': http://www.mail-archive.com/rtnet-users%40lists.sourceforge.net/msg00968.ht= =3D ml >Do video capturing applications tend to have to observe multiple >channels asynchronously via a single thread? If so, my statement about >how often poll/select is actually required in RT-applications may have >to be reconsidered. Actually, I don't see any reasonable reason for using select/poll in rt=3D20 applications. But, while trying to keep the API similar to V4L2, I would=3D= 20 implement them by IOCTL and think it is OK, since it was already done for= =3D20 MMAP/MUNMAP. I don't think it worths writing the poll/select rt like=3D20 functions... What could be discussed here is if it will be required or not to have those= =3D =3D20 calls needed when using streaming (most designs will use streaming). I don'= =3D t=3D20 think it should be required as it is on V4L2, but could be implemented=3D20 optionally, as IOCTL calls. But I would need to investigate more this topic= =3D =3D2E=3D20 I'll do it tomorrow... I'm the last man in the lab and they are calling me= =3D =3D20 out for closing the lab... >... >Does your time allow to list the minimal generic services a RTDM video >capturing driver has to provide in a similar fashion like the serial or >the CAN profile? If it's mostly about copying existing Linux API specs, >feel free to just reference them. But the differences should certainly >fill up a RT-video (or so) profile, and that would be great! I'll think about it and will answer tomorrow. Regards, Rodrigo =09 =09 =09 _______________________________________________________=20 Yahoo! doce lar. Fa=E7a do Yahoo! sua homepage.=20 http://br.yahoo.com/homepageset.html=20