osobhandClaude Opus 5.5
07094e34a9
hdf5plugin's Bitshuffle failed with UnsupportedFilter(32008). The new
`bitshuffle` feature (pure Rust: lz4_flex, and ruzstd for Zstandard — the
`zstd` feature's libzstd is not needed) decodes all three modes of
bshuf_h5filter.c — transpose only, LZ4 and Zstandard blocks behind the
12-byte header — including the default and explicit block sizes, the
shorter last block rounded down to a multiple of 8 elements, and the
untransposed trailing elements. Sizes read from the chunk are bounded by
the chunk size.
It also encodes: DatasetBuilder::with_bitshuffle(BitshuffleCompression)
or PluginFilter::Bitshuffle { block_size, compression } writes the filter
with hdf5plugin's cd_values and no automatic byte shuffle. ruzstd has one
compression level (about zstd's 1); the requested level is recorded.
The bit transpose is checked bit for bit against a one-bit-at-a-time model
(which matched hdf5plugin's output) and is shared with blosc next.
Interop: hdf5plugin writes none/LZ4/Zstandard at default and explicit
block sizes and levels over the 12-case matrix, read byte for byte; our
three modes at two block sizes read back through hdf5plugin. Both fail
with the decoder removed.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
72 lines
2.6 KiB
TOML
72 lines
2.6 KiB
TOML
[package]
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name = "clawhdf5-format"
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version = "2.7.0"
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edition = "2024"
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rust-version.workspace = true
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description = "Pure-Rust HDF5 binary format parsing and writing — no C dependencies"
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license = "MIT"
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repository = "https://git.redclaw.dev/quantumclaw/clawhdf5"
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readme = "README.md"
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keywords = ["hdf5", "science", "data", "binary", "no-std"]
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categories = ["parser-implementations", "science", "encoding", "no-std"]
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[dependencies]
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byteorder = { version = "1", default-features = false }
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portable-atomic = { version = "1" }
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flate2 = { version = "1", default-features = false, features = ["rust_backend"], optional = true }
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sha2 = { version = "0.10", default-features = false, optional = true }
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rayon = { version = "1", optional = true }
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crc32fast = { version = "1", optional = true }
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lz4_flex = { version = "0.11", optional = true }
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zstd = { version = "0.13", optional = true }
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blake3 = { version = "1", optional = true }
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libaec-sys = { path = "../libaec-sys", version = "0.1", optional = true }
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pco = { version = "1.0", optional = true }
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# Pure-Rust Zstandard, for the plugin filters that embed zstd (bitshuffle,
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# blosc). The `zstd` feature (filter 32015) links libzstd instead.
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ruzstd = { version = "0.9", optional = true }
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[dev-dependencies]
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half = { workspace = true }
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serde_json = "1"
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criterion = { workspace = true }
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clawhdf5-derive = { path = "../clawhdf5-derive", version = "2.7.0" }
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[[bench]]
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name = "bench"
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harness = false
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[features]
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# Deflate backend: `zlib-rs` (pure Rust) by default. `fast-deflate` selects
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# zlib-ng instead (C, built with cmake); flate2 prefers a C zlib whenever one
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# is enabled, so turning it on anywhere in the build overrides the default.
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default = ["std", "checksum", "deflate", "provenance", "zlib-rs", "system-zlib-decompress", "lzf"]
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std = []
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checksum = []
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deflate = ["flate2"]
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provenance = ["sha2"]
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parallel = ["rayon", "std"]
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fast-checksum = ["crc32fast"]
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fast-deflate = ["flate2/zlib-ng"]
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system-zlib = ["flate2/zlib-default"]
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system-zlib-decompress = []
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# `runtime_detection` gives zlib-rs `std`, which it needs to detect and use
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# SIMD at runtime. flate2 enables it by default, but we build flate2 with
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# default-features = false, and without it zlib-rs inflates 3.5x slower.
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zlib-rs = ["flate2/zlib-rs", "flate2/runtime_detection"]
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lz4 = ["lz4_flex"]
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zstd = ["dep:zstd"]
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blake3_hash = ["blake3"]
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szip = ["libaec-sys"]
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pcodec = ["dep:pco"]
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# Plugin filters, pure Rust. LZF (32000) is h5py's built-in compression; it
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# has no dependencies, so it is on by default.
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lzf = []
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# Bitshuffle (32008), with its LZ4 and Zstandard modes.
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bitshuffle = ["lz4_flex", "ruzstd"]
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[[bench]]
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name = "parallel_decompress_bench"
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harness = false
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required-features = ["parallel"]
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