[PATCH] Add RGB555X and RGB565X formats to pxa-camera
g.liakhovetski at gmx.de
Sun Sep 6 14:15:17 EDT 2009
On Sun, 6 Sep 2009, Marek Vasut wrote:
> Dne Ne 6. září 2009 18:52:55 Guennadi Liakhovetski napsal(a):
> > On Sun, 6 Sep 2009, Marek Vasut wrote:
> > > Ah damn, I see what you mean. What the camera does is it swaps the RED
> > > and BLUE channel:
> > > 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
> > > B4 B3 B2 B1 B0 G4 G3 G2 G1 G1 R4 R3 R2 R1 R1 --
> > > so it's more a BGR555/565 then. I had to patch fswebcam for this.
> > Ok, this is, of course, something different. In this case you, probably,
> > could deceive the PXA to handle blue as red and the other way round, but
> > still, I would prefer not to do that. Hence my suggestion remains - pass
> > these formats as raw data.
> Which is bogus from the camera point of view.
Not at all. This just means: the subdevice provides a pixel format, that
the bridge (PXA) knows nothing specific about, but it can just pass it
one-to-one (as raw data) to the user - don't see anything bogus in this.
Different bridges have support for different pixel colour formats, but, I
think, all bridges can pass data as raw (pass-through). Some bridges can
_only_ do this, so, this is actually the default video-capture mode.
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
More information about the linux-arm-kernel