On Tue, Oct 2, 2012 at 2:10 PM, Maarten Lankhorst
<m.b.lankho...@gmail.com> wrote:
> How do you want to deal with the case where Y' and CbCr are different
> hardware buffers?
> Could some support for 2d arrays be added in case Y' and CbCr are separated
> into top/bottom fields?
> How are semi-planar/planar formats handled that have a different width/height
> for Y' and CbCr? (YUV420)
The API works (AFAIU) like drm addfb2 ioctl, take I420 for example,
you could either do:
single buffer:
fd0 = fd
offset0 = 0
pitch0 = width
fd1 = fd
offset1 = width * height
pitch1 = width / 2
fd2 = fd
offset2 = offset1 + (width / height / 4)
pitch2 = width / 2
multiple buffers:
offset0 = offset1 = offset2 = 0
fd0 = fd_luma
fd1 = fd_u
fd2 = fd_v
... and so on
for interlaced/stereo.. is sticking our heads in sand an option? :-P
You could get lots of permutations for data layout of fields between
interlaced and stereo. One option might be to ignore and let the user
create two egl-images and deal with blending in the shader?
BR,
-R
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