Hi!
> > I think libv4l itself has algorithms to control at least some of these. It
> > relies on the image data so the CPU time consumption will be high.
> >
> > AFAIR Laurent has also worked on implementing some algorithms that use the
> > histogram and some of the statistics. Add him to cc list.
>
> http://git.ideasonboard.org/omap3-isp-live.git
>
> That's outdated and might not run or compile anymore. The code is
> more of a
Lets see, it compiles with this hack:
index 6f3ffbe..935f41d 100644
--- a/isp/v4l2.c
+++ b/isp/v4l2.c
@@ -292,7 +292,7 @@ struct v4l2_device *v4l2_open(const char *devname)
* driver (>= v3.19) will set both CAPTURE and OUTPUT in the
* capabilities field.
*/
- capabilities = cap.device_caps ? : cap.capabilities;
+ capabilities = /* cap.device_caps ? : */ cap.capabilities;
if (capabilities & V4L2_CAP_VIDEO_CAPTURE)
dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
I can try to run it, but I guess I'll need kernel with camera support.
pavel@n900:/my/omap3-isp-live$ LD_LIBRARY_PATH=isp ./snapshot
media_open: Can't open media device /dev/media0
error: unable to open media device /dev/media0
Segmentation fault (core dumped)
I tried again on kernel with camera:
pavel@n900:/my/omap3-isp-live$ LD_LIBRARY_PATH=isp ./snapshot
error: unable to locate sensor.
Segmentation fault (core dumped)
pavel@n900:/my/omap3-isp-live$
Here's the fix for coredump:
diff --git a/isp/subdev.c b/isp/subdev.c
index 9b36234..c74514e 100644
--- a/isp/subdev.c
+++ b/isp/subdev.c
@@ -75,6 +75,8 @@ int v4l2_subdev_open(struct media_entity *entity)
void v4l2_subdev_close(struct media_entity *entity)
{
+ if (!entity)
+ return;
if (entity->fd == -1)
return;
Let me investigate some more.
> proof of concept implementation, but it could be used as a starting point.
> With an infinite amount of free time I'd love to work on an open-source
> project for computational cameras, integrating it with libv4l.
For the record, I pushed my code to
https://gitlab.com/pavelm/fcam-dev
Best regards,
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures)
http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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