Hi all, I wanted to share these two drivers, even though they need more work, particular w.r.t. code quality. They assume that PART 1 and PART 2 of the vb2 patch series are applied. The viloop driver loops video from one device to another. It will create pairs of video devices, the first an output device, the second a capture device, and just copy the video data from one device to the other. It can be loaded in multiplanar mode with the multiplanar=1 option. It's a clean implementation using all the latest frameworks, in particular all streaming memory models are supported as well as EXPBUF. I did look at first at the out-of-tree v4l2-loopback driver, but it was quicker to just write my own. The vioverlay driver is a driver to test overlay support, both capture and output overlays. Few drivers support this, so it is very hard to have applications test their support for overlays, or to test drivers with overlay support. Overlay may be less and less important, but it is part of the API and you need a way to test it. The vioverlay driver creates a framebuffer, an output video node and a capture video node. The output video node is used to pass video to the driver which will be used as the video for the video output overlay feature. The capture node is used to capture the result of the framebuffer contents mixed in with the video output overlay. Currently clipping and bitmap support is in, but not yet alpha blending and chromakeying. Feedback and ideas are welcome. Again, I am well aware that these drivers need some more code cleanup work, so don't bother commenting on that :-) They've been written in just the past 3-4 days so they are freshly baked... Regards, Hans -- 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
