Hi everyone,
Currently there is limitation in v4l2 for specifying the 3D
formats . In HDMI 1.4 standard, the following 3D formats are
specified:
1. FRAME_PACK,
2. FIELD_ALTERNATIVE,
3. LINE_ALTERNATIVE,
4. SIDE BY SIDE FULL,
5. SIDE BY SIDE HALF,
6. LEFT + DEPTH,
7. LEFT + DEPTH + GRAPHICS + GRAPHICS-DEPTH,
8. TOP AND BOTTOM
In addition for some of the formats like Side-by-side-half there are
some additional metadata (like type of horizontal sub-sampling) and
parallax information which may be required for programming the display
processing pipeline properly.
I am not very sure on how to expose this to the userspace. This is an
inherent property of video signal , hence it would be appropriate to
have an additional field in v4l_format to specify 3D format. Currently
this is a requirement for HDMI 1.4 Rx / Tx but in the future it would
be applicable to broadcast sources also.
In our implementation we have temporarily defined a Private Control to
expose this .
Please let me know of your suggestions .
Best Regards
Soby Mathew
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