feat: add cast_value and scale_offset codecs

changes/3874.feature.md

@@ -0,0 +1 @@
+Add `cast_value` and `scale_offset` codecs.

pyproject.toml

@@ -69,6 +69,7 @@ remote = [
 gpu = [
     "cupy-cuda12x",
 ]
+cast-value-rs = ["cast-value-rs"]
 cli = ["typer"]
 optional = ["universal-pathlib"]
 
@@ -191,6 +192,16 @@ run-benchmark = "pytest --benchmark-enable tests/benchmarks"
 serve-coverage-html = "python -m http.server -d htmlcov 8000"
 list-env = "pip list"
 
+[tool.hatch.envs.cast-value]
+template = "test"
+features = ["cast-value-rs"]
+
+[[tool.hatch.envs.cast-value.matrix]]
+python = ["3.12"]
+
+[tool.hatch.envs.cast-value.scripts]
+run = "pytest tests/test_codecs/test_cast_value.py {args:}"
+
 [tool.hatch.envs.gputest]
 template = "test"
 extra-dependencies = [

src/zarr/codecs/__init__.py

@@ -2,6 +2,7 @@
 
 from zarr.codecs.blosc import BloscCname, BloscCodec, BloscShuffle
 from zarr.codecs.bytes import BytesCodec, Endian
+from zarr.codecs.cast_value import CastValue
 from zarr.codecs.crc32c_ import Crc32cCodec
 from zarr.codecs.gzip import GzipCodec
 from zarr.codecs.numcodecs import (
@@ -27,6 +28,7 @@
     Zlib,
     Zstd,
 )
+from zarr.codecs.scale_offset import ScaleOffset
 from zarr.codecs.sharding import ShardingCodec, ShardingCodecIndexLocation
 from zarr.codecs.transpose import TransposeCodec
 from zarr.codecs.vlen_utf8 import VLenBytesCodec, VLenUTF8Codec
@@ -38,9 +40,11 @@
     "BloscCodec",
     "BloscShuffle",
     "BytesCodec",
+    "CastValue",
     "Crc32cCodec",
     "Endian",
     "GzipCodec",
+    "ScaleOffset",
     "ShardingCodec",
     "ShardingCodecIndexLocation",
     "TransposeCodec",
@@ -50,12 +54,14 @@
 ]
 
 register_codec("blosc", BloscCodec)
+register_codec("cast_value", CastValue)
 register_codec("bytes", BytesCodec)
 
 # compatibility with earlier versions of ZEP1
 register_codec("endian", BytesCodec)
 register_codec("crc32c", Crc32cCodec)
 register_codec("gzip", GzipCodec)
+register_codec("scale_offset", ScaleOffset)
 register_codec("sharding_indexed", ShardingCodec)
 register_codec("zstd", ZstdCodec)
 register_codec("vlen-utf8", VLenUTF8Codec)