edf_reader/
lib.rs

1/*!
2 * edf-reader parse metadata of EDF file and can read block of data from this EDF file
3 * spec of EDF format : https://www.edfplus.info/specs/edf.html
4 *
5 */
6
7extern crate chrono;
8extern crate futures;
9
10#[macro_use]
11extern crate serde_derive;
12
13pub mod async_reader;
14pub mod file_reader;
15pub mod model;
16mod parser;
17pub mod sync_reader;
18
19use std::mem::transmute;
20
21use model::EDFHeader;
22
23use std::io::{Error, ErrorKind};
24
25fn get_sample(data: &Vec<u8>, index: usize) -> i16 {
26    unsafe { transmute::<[u8; 2], i16>([data[2 * index].to_le(), data[2 * index + 1].to_le()]) }
27}
28
29fn check_bounds(start_time: u64, duration: u64, edf_header: &EDFHeader) -> Result<(), Error> {
30    if start_time + duration > edf_header.block_duration * edf_header.number_of_blocks {
31        return Err(Error::new(
32            ErrorKind::InvalidInput,
33            "Window is out of bounds",
34        ));
35    } else {
36        Ok(())
37    }
38}
39
40#[cfg(test)]
41mod tests {
42
43    use super::get_sample;
44
45    #[test]
46    fn convert_byte_array_to_u16() {
47        /**
48        Javascript code to retreive the same results :
49
50        const buffer = new ArrayBuffer(2*2);
51
52        let view = new DataView(buffer);
53
54        view.setInt16(0, 456,true);
55        view.setInt16(2, -4564,true);
56
57        console.log(new Uint8Array(buffer));  ==> Uint8Array [ 200, 1, 44, 238 ]
58        */
59
60        assert_eq!(456, get_sample(&vec![200, 1], 0));
61        assert_eq!(-4564, get_sample(&vec![44, 238], 0));
62    }
63
64}
edf_reader/lib.rs

edf_reader/
lib.rs
