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Htscodecs 1.2.1
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@jkbonfield jkbonfield released this 21 Feb 15:07
· 148 commits to master since this release
v1.2.1
c6a459a

This release contains the following minor changes. Please see the "git log" for the full details.

Improvements / changes:

  • Speed up of rANS4x16 order-0. We now use a branchless encoder renormalisation step. For complex data it's between 13 and 50% speed up depending on compiler.

  • Improve rANS4x16 compute_shift estimates. The entropy calculation is now more accurate. This leads to more frequent use of the 10-bit frequency mode, at an expense of up to 1% size growth.

  • Speed improvements to the striped rANS mode, both encoding and decoding. Encoder gains ~8% and decoder ~5%, but varies considerably by compiler and data.

  • Added new var_put_u64_safe and var_put_u32_safe interfaces. These are automatically used by var_put_u64 and var_put_u32 when near the end of the buffer, but may also be called directly.

  • Small speed ups to the hist8 and hist1_4 functions.

  • Minor speed up to RLE decoding.

Bug fixes:

  • Work around an icc-2021 compiler bug, but also speed up the varint encoding too (#29).

  • Fix an off-by-one error in the initial size check in arith_dynamic. This meant the very smallest of blocks could fail to decode. Reported by Divon Lan.

  • Fixed hist1_4 to also count the last byte when computing T0 array.

  • Fixed overly harsh bounds checking in the fqzcomp read_array function, which meant it failed to decode some configurations.

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