On Wednesday, September 08, 2010 00:29:51 Theodore Kilgore wrote:
>
> On Tue, 7 Sep 2010, Hans Verkuil wrote:
>
> > On Tuesday, September 07, 2010 20:42:07 Hans Verkuil wrote:
> > > On Tuesday, September 07, 2010 19:57:18 Jean-Francois Moine wrote:
> > > > On Tue, 7 Sep 2010 17:30:33 +0200
> > > > Hans Verkuil <[email protected]> wrote:
> > > >
> > > > > enum v4l2_illuminator {
> > > > > V4L2_ILLUMINATOR_OFF = 0,
> > > > > V4L2_ILLUMINATOR_ON = 1,
> > > > > };
> > > > > #define V4L2_CID_ILLUMINATOR_0 (V4L2_CID_BASE+37)
> > > > > #define V4L2_CID_ILLUMINATOR_1 (V4L2_CID_BASE+38)
> > > > >
> > > > > enum v4l2_led {
> > > > > V4L2_LED_AUTO = 0,
> > > > > V4L2_LED_OFF = 1,
> > > > > V4L2_LED_ON = 2,
> > > > > };
> > > > > #define V4L2_CID_LED_0 (V4L2_CID_BASE+39)
> > > > >
> > > > > Simple and straightforward.
> > > >
> > > > Hi,
> > > >
> > > > Hans (de Goede), is this OK for you? I think that if we find more
> > > > illuminators or LEDs on some devices, we may add more V4L2_CID_xxx_n
> > > > controls.
> > > >
> > > > Hans (Verkuil), may we have the same enum's for both light types?
> > > > Something like:
> > > >
> > > > enum v4l2_light {
> > > > V4L2_LIGHT_OFF = 0,
> > > > V4L2_LIGHT_ON = 1,
> > > > V4L2_LIGHT_AUTO = 2,
> > > > V4L2_LIGHT_BLINK = 3,
> > > > };
> > >
> > > I'm OK with that. Although 'blink' shouldn't be added yet unless we have a
> > > driver that will actually make use of it.
> >
> > I realized something else: while for us programmers it is perfectly natural
> > to start counting at 0, for the rest of the world it is probably more
> > understandable to start counting at 1. I know it goes against our religion,
> > but sometimes you just have to conform. :-)
> >
> > Regards,
> >
> > Hans
>
> Sorry about the long silence from here, but there has been illness in the
> family. I do keep trying to watch whatever is going on.
>
> Hans, I agree with your general characterization of the public's
> perception of 0 versus 1. But on this particular occasion I suspect that
> the general public would see that 0 corresponds more naturally to "off"
> than 1 does.
Ah, I see I was ambiguous in what I wrote. I referred to the '0' in
V4L2_CID_LED_0/V4L2_CID_ILLUMINATOR_0 (and their corresponding names as
reported to the user as "LED 0"/"Illuminator 0"), not to the 0 in the enum.
Regards,
Hans
>
> Hoping that all is well with you and others.
>
> Cheers, and this is just my two cents on a trivial issue.
>
> Theodore Kilgore
>
--
Hans Verkuil - video4linux developer - sponsored by TANDBERG, part of Cisco
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