[PATCH v2 0/1] VirtIO video device specification

[Keiichi Watanabe <keiichiw@chromium.org>]

Hi,
This is the 2nd version of virtio-video patch. The PDF is available in [1].
The first version was sent at [2].

Any feedback would be appreciated. Thank you.

Best,
Keiichi

[1]: https://drive.google.com/drive/folders/1eT5fEckBoor2iHZR4f4GLxYzFMVapOFx?usp=sharing
[2]: https://markmail.org/message/gc6h25acct22niut

Change log:

v2:
* Removed functionalities except encoding and decoding.
* Splited encoder and decoder into different devices that use the same protocol.
* Replaced GET_FUNCS with GET_CAPABILITY.
* Updated structs for capabilities.
  - Defined new structs and enums such as image formats, profiles, range (min,
  max, step), etc
    * For virtio_video_pixel_format, chose a naming convention that is used
      in DRM. We removed XBGR, NV21 and I422, as they are not used in the
      current draft implementation. https://lwn.net/Articles/806416/
  - Removed virtio_video_control, whose usage was not documented yet and which
    is not necessary for the simplest decoding scenario.
  - Removed virtio_video_desc, as it is no longer needed.
* Updated struct virtio_video_config for changes around capabilities.
* Added a way to represent supported combinations of formats.
  - A field "mask" in virtio_video_format_desc plays this role.
* Removed VIRTIO_VIDEO_T_STREAM_{START,STOP} because they don't play any meaningful roles.
* Removed VIRTIO_VIDEO_T_STREAM_{ATTACH, DETACH}_BACKING and merged them into RESOURCE_{CREATE, DESTROY}.
* Added a way to notify/specify resource creation method.
  - Added a feature flag.
  - Defined enum virtio_video_mem_type.
  - Added new fields in video_stream_create.
* Modified fields in virtio_video_params.
  - Added crop information.
* Removed enum virtio_video_channel_type because we can get this information by image format.
* Renamed virtio_video_pin to virtio_video_buf_type.
  - It's similar to V4L2_BUF_TYPE_VIDEO_{OUTPUT, CAPTURE}.
* Added an error event.
* Reordered some subsections.
* Changed styles to make it consistent with other devices.

Dmitry Sepp (1):
  virtio-video: Add virtio video device specification

 content.tex      |   1 +
 virtio-video.tex | 579 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 580 insertions(+)
 create mode 100644 virtio-video.tex

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