[FFmpeg-devel] libavcodec/exr : fix tile and pxr24 when all channels doesn't have the same type

[Martin Vignali]

Hello,

In attach patchs to fix decoding error, when all channels doesn't have the
same pixel type.

001 : Fix tile, and simplify the tile support (remove unneed reorganisation
of pixel).
002 : remove scanline_size var, is now replace by the same calc for tile
and scanline
003 : Fix PXR24 uncompress, to manage several pixel type. expected_len, is
now calculate channel by channel.
I don't think this code have a lot of interest to be share with other
compressor. PXR24, is the only compressor, where the float data, doesn't
have the size of a float.


For now, theses patchs, fix decoding tile whith half channel and float
channel for :
uncompress, rle, zip, zips, pxr24, piz.

And fix decoding PXR24 scanline.

But doesn't fix B44/B44a uncompress when all channels doesn't have the same
pixel type (but it's related to other issues).


Some samples with half and float channel can be found here :
https://we.tl/iN2zKNWlzB

Theses patch also pass fate test.

Comments welcome

Martin Vignali
Jokyo Images
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