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 That's outdated and might not run or compile anymore.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 -- 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
