slow5-rs

A library for interacting with SLOW5/BLOW5 files in the Rust programming language.

For more information check out the main slow5lib repository or the paper.

This repository provides two crates:

• slow5lib-sys: Bindings to the C library using bindgen
• slow5: Rust API built on-top of slow5lib-sys

The interface for slow5 is largely stable and now updated primarily to follow new versions slow5lib. If there is additional functionality you'd like to see, please file a Github Issue.

Installation

Add the following to your Cargo.toml:

[dependencies]
slow5 = "0.12"

Git

If you'd like to download the git version, use the following command to download the repo

git clone --recursive https://github.com/bsaintjo/slow5-rs.git

Getting started

Reading signal from SLOW5 file

use slow5::{FileReader, RecordExt};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let mut slow5 = FileReader::open("examples/example.slow5").unwrap();
    for record in slow5.records() {
        for signal in record?.picoamps_signal_iter() {
            // Do stuff
        }
    }
    Ok(())
}

Writing a compressed BLOW5 file with attributes

use std::error::Error;
use slow5::{FileWriter, SignalCompression, Record};

fn main() -> Result<(), Box<dyn Error>> {
    let tmp_dir = std::env::temp_dir();
    let output = tmp_dir.join("test.blow5");
    let mut writer = FileWriter::options()
        .signal_compression(SignalCompression::StreamVByte)
        .attr("attribute", "value", 0)
        .create(output)?;
    let rec = Record::builder()
        .read_id("test_id")
        .read_group(0)
        .digitisation(4096.0)
        .offset(4.0)
        .range(12.0)
        .sampling_rate(4000.0)
        .raw_signal(&[0, 1, 2, 3])
        .build()?;
    writer.add_record(&rec)?;
    writer.close();
    Ok(())
}

More example code

For more example code, see the test code. Several examples from the original library have been ported to rust and can be found in the examples directory.

Feature flags

• zstd: Enable zstd-based compression
  • enabled by default
• zlib-ng: Enable usage of high performance zlib-ng
  • adds cmake dependency
• serde: Enable serde dependency
  • Mainly for serializing Record into serde-compatible formats

License

Licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.