Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752567AbdCOS4X (ORCPT ); Wed, 15 Mar 2017 14:56:23 -0400 Received: from mail-qt0-f176.google.com ([209.85.216.176]:35884 "EHLO mail-qt0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751168AbdCOS4U (ORCPT ); Wed, 15 Mar 2017 14:56:20 -0400 Message-ID: <1489604109.4593.4.camel@ndufresne.ca> Subject: Re: media / v4l2-mc: wishlist for complex cameras (was Re: [PATCH v4 14/36] [media] v4l2-mc: add a function to inherit controls from a pipeline) From: Nicolas Dufresne To: Philippe De Muyter , Mauro Carvalho Chehab Cc: Pavel Machek , Hans Verkuil , Sakari Ailus , Russell King - ARM Linux , Steve Longerbeam , robh+dt@kernel.org, mark.rutland@arm.com, shawnguo@kernel.org, kernel@pengutronix.de, fabio.estevam@nxp.com, mchehab@kernel.org, nick@shmanahar.org, markus.heiser@darmarIT.de, p.zabel@pengutronix.de, laurent.pinchart+renesas@ideasonboard.com, bparrot@ti.com, geert@linux-m68k.org, arnd@arndb.de, sudipm.mukherjee@gmail.com, minghsiu.tsai@mediatek.com, tiffany.lin@mediatek.com, jean-christophe.trotin@st.com, horms+renesas@verge.net.au, niklas.soderlund+renesas@ragnatech.se, robert.jarzmik@free.fr, songjun.wu@microchip.com, andrew-ct.chen@mediatek.com, gregkh@linuxfoundation.org, shuah@kernel.org, sakari.ailus@linux.intel.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org, devel@driverdev.osuosl.org, Steve Longerbeam , Jacek Anaszewski Date: Wed, 15 Mar 2017 14:55:09 -0400 In-Reply-To: <20170315105049.GA12099@frolo.macqel> References: <20170310125342.7f047acf@vento.lan> <20170310223714.GI3220@valkosipuli.retiisi.org.uk> <20170311082549.576531d0@vento.lan> <20170313124621.GA10701@valkosipuli.retiisi.org.uk> <20170314004533.3b3cd44b@vento.lan> <20170314072143.498cde9b@vento.lan> <20170314223254.GA7141@amd> <20170314215420.6fc63c67@vento.lan> <20170315105049.GA12099@frolo.macqel> Content-Type: multipart/signed; micalg="pgp-sha1"; protocol="application/pgp-signature"; boundary="=-7fq51Td7eGbeBp/kWBM3" X-Mailer: Evolution 3.22.5 (3.22.5-1.fc25) Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1866 Lines: 51 --=-7fq51Td7eGbeBp/kWBM3 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Le mercredi 15 mars 2017 =C3=A0 11:50 +0100, Philippe De Muyter a =C3=A9cri= t=C2=A0: > > I would say: camorama, xawtv3, zbar, google talk, skype. If it runs > > with those, it will likely run with any other application. > >=20 >=20 > I would like to add the 'v4l2src' plugin of gstreamer, and on the > imx6 its While it would be nice if somehow you would get v4l2src to work (in some legacy/emulation mode through libv4l2), the longer plan is to implement smart bin that handle several v4l2src, that can do the required interactions so we can expose similar level of controls as found in Android Camera HAL3, and maybe even further assuming userspace can change the media tree at run-time. We might be a long way from there, specially that some of the features depends on how much the hardware can do. Just being able to figure-out how to build the MC tree dynamically seems really hard when thinking of generic mechanism. Also, Request API will be needed. I think for this one, we'll need some userspace driver that enable the features (not hide them), and that's what I'd be looking for from libv4l2 in this regard. > imx-specific counterpart 'imxv4l2videosrc' from the gstreamer-imx > package > at https://github.com/Freescale/gstreamer-imx, and 'v4l2-ctl'. This one is specific to IMX hardware using vendor driver. You can probably ignore that. Nicolas --=-7fq51Td7eGbeBp/kWBM3 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEABECAAYFAljJjg0ACgkQcVMCLawGqBzWHACfQymBOSCSce0cthYH9b7XZ0jx 87wAnR09ioCl/7XxAg/iQxU6O3boR99I =mn5/ -----END PGP SIGNATURE----- --=-7fq51Td7eGbeBp/kWBM3--