Numcodecs

:issue:`18`).

* An option has been added to the :class:`numcodecs.blosc.Blosc` codec to allow the block size to
be manually configured (:issue:`9`, :issue:`19`).

* The representation string for the :class:`numcodecs.blosc.Blosc` codec has been tweaked to
help with understanding the shuffle option (:issue:`4`, :issue:`19`).

* Options have been added to manually control how the C extensions are built regardless of the
architecture of the system on which the build is run. To disable support for AVX2 set the
environment variable "DISABLE_NUMCODECS_AVX2". To disable support for SSE2 set the environment
variable "DISABLE_NUMCODECS_SSE2". To disable C extensions altogether set the environment variable
"DISABLE_NUMCODECS_CEXT" (:issue:`24`, :issue:`26`).

Maintenance work:

* CI tests now run under Python 3.6 as well as 2.7, 3.4, 3.5 (:issue:`16`, :issue:`17`).

* Test coverage is now monitored via
`coveralls <https://coveralls.io/github/alimanfoo/numcodecs?branch=master>`_
(:issue:`15`, :issue:`20`).


.. _release_0.0.1:

------

Breaking changes
~~~~~~~~~~~~~~~~
* All arguments to the ``PCodec`` constructor except for ``level``
are now keyword only, to support the updated API.
By :user:`Sam Levang <slevang>`, :issue:`623`

Deprecations
~~~~~~~~~~~~
The following ``blosc`` funcitons are deprecated, with no replacement.
This is because they are not intended to be public API.

- ``numcodecs.blosc.init``
- ``numcodecs.blosc.destroy``
- ``numcodecs.blosc.compname_to_compcode``
- ``numcodecs.blosc.cbuffer_sizes``
- ``numcodecs.blosc.cbuffer_metainfo``

In addition, ``numcodecs.blosc.decompress_partial`` is deprecated as
has always been experimental and there is no equivalent in the official
blsoc Python package.
By :user:`David Stansby <dstansby>`, :issue`619`

Fixes
~~~~~
* Fixes issue with ``Delta`` Zarr 3 codec not working with ``astype``.
By :user:`Norman Rzepka <normanrz>`, :issue:`664`
* Cleanup ``PCodec`` soft dependency.
Previously importing ``numcodecs.pcodec`` would work if ``pcodec`` is not installed,
but now it will fail to import. This mirrors the behaviour of other optional dependencies.
By :user:`John Kirkham <jakirkham>`, :issue:`647`
* Fixes issues with the upcoming ``zarr`` 3.0.0 release.
By :user:`Norman Rzepka <normanrz>`, :issue:`675`

* Removed Version Check: The previous code included a check for the `NumPy` version
and a warning if the version was incompatible with `zfpy`.
This check has been removed because `zfpy` now supports the newer versions of `NumPy`.
By :user:`Meher Gajula <me-her>`, :issue:`672`

Improvements
~~~~~~~~~~~~
* Add support for ``pcodec`` 0.3. This exposes the new ``delta_spec``
and ``paging_spec`` arguments, but maintains full backwards
compatibility for data written with older package versions.
By :user:`Sam Levang <slevang>`, :issue:`623`
* If an import error is raised when trying to define a codec that is *not*
an optional dependency, it is no longer silently caught. Instead it will
be propagated to the user, as this indicates an issue with the installed
package.

Import errors caused by optional dependencies (ZFPY, MsgPack, CRC32C, and PCodec)
are still silently caught.
By :user:`David Stansby <dstansby>`, :issue:`550`.

.. _release_0.14.1:

------

Fixes
~~~~~
* Cleanups to the ``crc32c`` soft dependency.
Whereas in ``numcodecs`` 0.14.0 a runtime error was raised if
the ``CRC32C`` codec used without the ``crc32c`` installed,
the ``CRC32C`` codec is no longer defined at import time if
``crc32c`` is not installed. This has been changed to match
the behaviour of other optional dependencies/codecs.
By :user:`John Kirkham <jakirkham>`, :issue:`637`

Improvements
~~~~~~~~~~~~
* Add `noexcept` to `_utils` C-equiv functions
By :user:`John Kirkham <jakirkham>`, :issue:`641`.

.. _release_0.14.0:

------

Enhancements
~~~~~~~~~~~~
* Add Crc32c checksum codec.
By :user:`Norman Rzepka <normanrz>`, :issue:`613`.
* Add codec wrappers for Zarr 3.
By :user:`Norman Rzepka <normanrz>`, :issue:`524`
* Added mypy type checking to continuous integration.
By :user:`David Stansby <dstansby>`, :issue:`460`.

Fixes
~~~~~
* Fix in-place mutation of input array in `BitRound`.
By :user:`Sam Levang <slevang>`, :issue:`608`
* Fix an issue where importing numcodecs would lock the state of `multiprocessing`
and prevent user code to call `multiprocessing.set_start_method("spawn")`
subsequently.
By :user:`Clément Robert <neutrinoceros>` :issue:`522`

Maintenance
~~~~~~~~~~~
* The minimum supported Python version is now Python 3.11.
By :user:`David Stansby <dstansby>`, :issue:`622`
* The minimum supported numpy version is now 1.24.
By :user:`David Stansby <dstansby>`, :issue:`622`

.. _release_0.13.1:

------

Breaking changes
~~~~~~~~~~~~~~~~
* `Zstd.default_level`, `Zstd.min_level`, and `Zstd.max_level` are now class methods
instead of properties. This means they must now be called like ``Zstd.default_level()``
instead of ``Zstd.default_level``. This breaking change has been made because Python 3.13
removes support for class properties.
By :user:`David Stansby <dstansby>`, :issue:`576`.

Enhancements
~~~~~~~~~~~~

* Update bundled c-blosc to v1.26.1. This updates Zlib to v1.3.1
and Zstd to v1.5.6.
By :user:`David Stansby <dstansby>`, :issue:`560`.
* Added support for Python 3.13 :user:`David Stansby <dstansby>`, :issue:`576`.
* Cleaned up the table of contents in the documentation to list codecs by category
:user:`David Stansby <dstansby>`, :issue:`458`.

Maintenance
~~~~~~~~~~~
* Change format() and old string formatting to f-strings.
By :user:`Dimitri Papadopoulos Orfanos <DimitriPapadopoulos>`, :issue:`439`.
* Remove pin on Sphinx
By :user:`Elliott Sales de Andrade <QuLogic>`, :issue:`552`.


.. _release_0.13.0:

------

Enhancements
~~~~~~~~~~~~
* Add checksum flag to zstd and sets the default level to 0.
By :user:`Norman Rzepka <normanrz>`, :issue:`519`.
* Add PCodec
By :user:`Ryan Abernathey <rabernat>`, :issue:`501`.
* Use PyData theme for docs
By :user:`John Kirkham <jakirkham>`, :issue:`485`.
* Improve the structure of docs
By :user:`David Stansby <dstansby>`, :issue:`458`.

Fix
~~~
* Fix VLenUTF8 encoding for read-only buffers.
By :user:`Isaac Virshup <ivirshup>`, :issue:`514`.
* Fix skip of entry points backport tests
By :user:`Elliott Sales de Andrade <QuLogic>`, :issue:`487`.
* Fix Upgrade to Zstd 1.5.5 due to potential corruption.
By :user:`Mark Kittisopikul <mkitti>`, :issue:`429`
* Add version constraint(<2.0) for numpy in zfpy.
By :user:`Tom Liang <px39n>`, :issue:`540`.

Maintenance
~~~~~~~~~~~
* The minimum supported Python version is now Python 3.10.
By :user:`David Stansby <dstansby>`, :issue:`531`
* Add numpy 2 compatibility.
By :user:`David Stansby <dstansby>`, :issue:`535`
* Update c-blosc to 1.21.0 to 1.21.5, zstd from 1.4.8 to 1.5.5,
lz4 from 1.9.3 to 1.9.4, and zlib from 1.2.8 to to 1.2.13
By :user:`Mark Kittisopikul <mkitti>`, :issue:`500`


.. _release_0.12.1: