Fourcc for multiplanar formats

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Hello,

we would like to ask for suggestions for new fourcc formats for multiplanar buffers.

There are planar formats in V4L2 API, but for all of them, each plane X "immediately
follows Y plane in memory". We are in the process of testing formats and V4L2 extensions
that relax those requirements and allow each plane to reside in a separate area of
memory.

I am not sure how we should name those formats though. In our example, we are focusing
on the following formats at the moment:
- YCbCr 422 2-planar (multiplanar version of V4L2_PIX_FMT_NV16)
- YCbCr 422 3-planar (multiplanar version of V4L2_PIX_FMT_YUV422P)
- YCbCr 420 2-planar (multiplanar version of V4L2_PIX_FMT_NV12)
- YCbCr 420 3-planar (multiplanar version of V4L2_PIX_FMT_YUV420)


Could anyone give any suggestions how we should name such formats and what to pass to
the v4l2_fourcc() macro?


Best regards
--
Pawel Osciak
Linux Platform Group
Samsung Poland R&D Center


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