On Monday 15 February 2010 17:27:46 Pawel Osciak wrote:
> 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?
What about V4L2_PIX_FMT_NV16_2P, V4L2_PIX_FMT_YUV422P_3P, etc.?
What we pass to the fourcc macro is not very important IMHO. As long as it is
unique.
Regards,
Hans
>
>
> Best regards
> --
> Pawel Osciak
> Linux Platform Group
> Samsung Poland R&D Center
>
>
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>
--
Hans Verkuil - video4linux developer - sponsored by TANDBERG
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