[gdal-dev] OpenJPEG update

[Aaron Boxer]

Hello,

I am looking into reducing memory usage for OpenJPEG.(how I spent my
Christmas holidays :)  )

So far, I have managed to halve memory usage for high bit rate decoding,
for example. 1920x1080 single tile lossy-compressed image at 9:1
compression.

And there is more low hanging fruit.....

I have a pull request submitted for my omnibus branch. This branch includes
performance and memory improvements:

1) OpenMP support: multi-threading built into the library
2) encoding perf improvements
3) memory mapped file support and drastic reduction in decode memory usage

All unit tests and memory leak tests have passed for this branch.

If these changes sound useful to you, please show your support by either
posting on the OpenJPEG news group:

https://groups.google.com/forum/#!forum/openjpeg

or commenting on the pull request:

https://github.com/uclouvain/openjpeg/pull/683

The project maintainers need "encouragement" to get new features merged
into the master.

Thanks and Happy New Year,
Aaron
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