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From: Frej Drejhammar <frej.drejhammar@gmail.com>
To: Trent Piepho <xyzzy@speakeasy.org>
Cc: video4linux-list@redhat.com
Subject: Re: [PATCH 0 of 2] cx88: Enable additional cx2388x features. Version 2
Date: Sun, 16 Mar 2008 22:05:11 +0100	[thread overview]
Message-ID: <k1w6a2xdk.fsf@liva.fdsoft.se> (raw)
In-Reply-To: <Pine.LNX.4.58.0803161258550.20723@shell4.speakeasy.net> (Trent Piepho's message of "Sun, 16 Mar 2008 13:28:06 -0700 (PDT)")

Trent,

> One of the things you should do it make the control inactive when in
> SECAM mode.  V4L2 has a flag to indicate controls that don't apply
> to the device's current mode.

I guess it is the V4L2_CTRL_FLAG_INACTIVE flag (in the flag field of
struct v4l2_queryctrl) you are referring to, correct?

> CAGC makes a difference for me too.  Some of my channels are over
> saturated and some are under saturated and CAGC fixes them.  I don't
> recall if I posted pictures last time CAGC came up, but it really
> does make a difference.

Good that I'm not the only one who wants/needs it :)

> I haven't ever been able to notice an effect from color killer.
> Maybe if you had poor reception from a B&W source?  Not much black
> and white on broadcast TV these days.

So maybe I should just skip the color killer then...

>> A quick grep shows that the bttv-driver also exposes chroma AGC as
>> a private control. Cx2584x has chroma AGC enabled by default. Maybe
>> the right thing to do is to enable chroma AGC by default for PAL
>> and NTSC?  Chroma AGC is something you'll find on most VCRs and
>> TVs, and then it is on by default.
>
> That's what I would do.  Have a standard control for CAGC and turn
> it on by default.

Then that's what I'll do. Expect a revised version of the patch which
enables CAGC by default for PAL+NTSC and implements the
V4L2_CTRL_FLAG_INACTIVE by the end of the week.

> If I wanted to be told I wasn't worthy to use my hardware, I'd run
> windows!

Hear, hear! :)

Regards,

--Frej

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  reply	other threads:[~2008-03-16 21:05 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-03-16 12:49 [PATCH 0 of 2] cx88: Enable additional cx2388x features. Version 2 Frej Drejhammar
2008-03-16 12:49 ` [PATCH 1 of 2] cx88: Add user control for chroma AGC Frej Drejhammar
2008-03-16 12:49 ` [PATCH 2 of 2] cx88: Add user control for color killer Frej Drejhammar
2008-03-16 13:42 ` [PATCH 0 of 2] cx88: Enable additional cx2388x features. Version 2 Hans Verkuil
2008-03-16 15:09   ` Frej Drejhammar
2008-03-16 20:28     ` Trent Piepho
2008-03-16 21:05       ` Frej Drejhammar [this message]
2008-03-16 23:27         ` Vanessa Ezekowitz
2008-03-17 10:33         ` Hans Verkuil
2008-03-17 13:14           ` Mauro Carvalho Chehab
2008-03-17 16:17             ` Frej Drejhammar
     [not found]       ` <47DDB7A7.6000400@foks.us>
2008-03-17  1:40         ` Trent Piepho

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