[Linaro-mm-sig] [PATCH 05/10] v4l: add buffer exporting via dmabuf
laurent.pinchart at ideasonboard.com
Mon Jan 23 14:37:49 UTC 2012
On Monday 23 January 2012 15:32:40 Mauro Carvalho Chehab wrote:
> Em 23-01-2012 11:51, Tomasz Stanislawski escreveu:
> > This patch adds extension to V4L2 api. It allow to export a mmap buffer
> > as file descriptor. New ioctl VIDIOC_EXPBUF is added. It takes a buffer
> > offset used by mmap and return a file descriptor on success.
> This requires more discussions.
> The usecase for this new API seems to replace the features previously
> provided by the overlay mode. There, not only the buffer were exposed to
> userspace, but some control were provided, in order to control the overlay
> Please start a separate thread about that, explaining how are you imagining
> that a V4L2 application would use such ioctl.
I think this is currently just a proof of concept. I'm sure Tomasz will
discuss the V4L2 API extension on the linux-media list when the code will be
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