Re: [virtio-dev] Re: [RFC PATCH v6] virtio-video: Add virtio video device specification

[Alexander Gordeev <alexander.gordeev@opensynergy.com>]

On 12.05.23 06:09, Alexandre Courbot wrote:
> On Thu, May 11, 2023 at 5:50âPM Alexander Gordeev
> <alexander.gordeev@opensynergy.com> wrote:
> > 3. We can have things, that V4L2 doesn't support in their stateful UAPI.
> > For example, dequeuing output buffers in decoder order.
>
> ... provided the host can do that (i.e. has a stateless decoder
> interface).

Indeed dequeuing in decoding order is obviously possible with stateless
interfaces. But it is often possible with stateful interfaces too AFAIK,
just not with V4L2. For example, we have this option on some of our
targets because the codecs are exposed using OMX with some vendor
extensions. This is a stateful interface.

--
Alexander Gordeev
Senior Software Engineer

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