Hi Sakari,
thanks for helping.
My "sensor" (TVP5146) already provides YUV data, so I can skip the
previewer. I tried setting the input and output pad of the resizer
subdevice to incoming resolution (input pad) and desired resolution
(output pad). For example: 720x576 --> 352x288. But it didn't work
out quite well.
How did it not work quite well? :)
Not sure, if I recall all the details. I haven't done much in this area
for a few weeks now.
Currently, I actually can configure the resizer, but then
VIDIOC_STREAMON fails with EINVAL when I configure the devnode. Don't
know why.
I do connect the resizer source to the resizer output (devnode) and then
capture from there. I think it is /dev/video6.
If I leave the resizer out and connect the ccdc source to the ccdc
output (/dev/video2), capturing works just fine.
One reason could be, that the resizer isn't supported right now. (You
remember, I have to use Technexion's TI kernel 2.6.37 with its exotic
ISP driver. ;-) )
That's, what one could interpret from this TI wiki page.
http://processors.wiki.ti.com/index.php/UserGuideOmap35xCaptureDriver_PSP_04.02.00.07#Architecture
Under the block diagram, there's a note saying, that only the path with
the continuous line has been validated. So, the dotted lines are ISP
paths that might not have been validated ("supported"?) yet.
(I might add, that all this is part of my master thesis and resizing
would be a nice-to-have goal, but not a must-have. So I can live with it
if it won't work.)
Can someone explain how one properly configures the resizer in an
ISP pipeline (with Media Controller API) ? I spend some hours
researching, but this topic seems to be a well guarded secret...
There's nothing special about it. Really.
The resizing factor is chosen by setting the media bus format on the source
pad to the desired size.
Yes, that is what I figured out eventually.
--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
