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Adding support for NLT marker segment of type 3 - #154
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…with it, but it is good for testing.
…he data is around 16bits/sample of more, coded losslessly.
…. Also addresses CodeQL.
…ify -bit_depth for .pfm files -- this temporary.
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This is to support NLT marker segment of type 3.
This should enable lossless compression of 16-bit floating point data, or 32-bit floating data that has been truncated to, say, 24-bits.
To support lossless compression of 32-bit float, we need a 64-bit data path, which is possible for a later point in time.
The code has been written for library, but is yet to be debugged.
I also need to expose this feature in ojph_compress and ojph_expand, which I have not done yet.
The pull request also changes the number of bits needed for lossless compression of data as in commit 5d888b5, but this unlikely to be noticed by anyone.