[FFmpeg-devel] libavcodec/exr : add B44 and B44A compression

[Martin Vignali]

Hello,

in attach patch who add support for B44 and B44A compression in openexr
file.

The B44/B44A block decoding function (unpack_14 and unpack_3) come from the
official library.

B44 only compress Half float data (Float data stay uncompress)
The compression use bloc of 4x4 pixels, and reduce the size from 32 bits to
14.

B44A use the same method than B44, except for uniform blocks who are stored
with only 3 bits.

Some B44/B44A samples can be found here
http://www.datafilehost.com/d/a3dc072e


Comments welcome

Martin Vignali
Jokyo Images
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