Re: [virtio-dev] [RFC RESEND] virtio-video: Add virtio video device specification

Gerd Hoffmann
2019-11-08T07:50:04Z

On Thu, Nov 07, 2019 at 02:09:34PM +0100, Dmitry Sepp wrote:
> Hello Gerd,
>
> Thank you for your feedback.
>
> There is no relationship between those. As I mentioned earlier. we have also
> been working on a virtio video device at the same time. And there is no
> relationship between the two specs.

Keiichi, have you looked at the spec?

I think it is useful to have a single device specification for all video
functions given that there is a bunch of common stuff. Both encoder and
decoder must negotiate video frame and video stream parameters for
example. Also the virtio-video spec looks like a superset of
virtio-vdec.

Is there any important feature in video-vdec which is missing in
virtio-video?

> virtio-video:
> 1. Uses the 'driver requests - device responses' model.
> 2. Does not have the logical split of bitstreams and framebuffers, has only a
> generic buffer object.

Can you give a quick summary on buffer object management?

thanks,
Gerd