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From: Robert Jarzmik <robert.jarzmik@free.fr>
To: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: video4linux-list@redhat.com
Subject: Re: Capturing video and still images using one driver
Date: Wed, 04 Nov 2009 20:57:33 +0100	[thread overview]
Message-ID: <877hu6m5aq.fsf@free.fr> (raw)
In-Reply-To: <Pine.LNX.4.64.0911032250060.5059@axis700.grange> (Guennadi Liakhovetski's message of "Tue\, 3 Nov 2009 23\:02\:04 +0100 \(CET\)")

Guennadi Liakhovetski <g.liakhovetski@gmx.de> writes:

> I came across the same problem when working on the rj54n1cb0c driver. 
> What's even more exciting with that sensor, is that it has separate 
> frame-size settings for preview (video) and still capture.

It seems this behaviour is generic across several sensors. As far as I know, the
mt9m111 has 2 modes : low power low resolution, and high power high resolution,
and both are programmable apart (in terms of resolution, zoom, etc ...)

What this makes me think is that a sensor could provide several "contexts" of
use, as :
 - full resolution still image context
 - low resolution still image context
 - full resolution video context
 - low resolution video context

Then, a new/existing v4l2 call would switch the context (perhaps based on buffer
type ?) of the sensor.

Well, that's just some junk I've been thinking over lately.

Cheers.

--
Robert

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  parent reply	other threads:[~2009-11-04 19:57 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-11-03  0:21 Capturing video and still images using one driver Neil Johnson
2009-11-03 22:02 ` Guennadi Liakhovetski
2009-11-03 22:13   ` Neil Johnson
2009-11-11 23:56     ` Neil Johnson
2009-11-12  7:21       ` Guennadi Liakhovetski
2010-04-17 23:26       ` Leon Woestenberg
2009-11-04 19:57   ` Robert Jarzmik [this message]
2009-11-05 20:37     ` Guennadi Liakhovetski
2009-11-06 17:11       ` Robert Jarzmik
  -- strict thread matches above, loose matches on Subject: below --
2009-11-05 20:38 Guennadi Liakhovetski

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