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use mp3_metadata::MP3Metadata;
use std::fs::File;
use std::io;
use std::path::Path;
use crate::util::duration::DurationExtractor;
use crate::util::Duration;
use matroska::MatroskaError;
pub struct MkvDurationExtractor;
impl DurationExtractor for MkvDurationExtractor {
fn supports_ext(&self, ext_lowercase: &str) -> bool {
"mkv" == ext_lowercase || "webm" == ext_lowercase
}
fn try_read_duration(
&self,
path: &Path,
_: &Option<MP3Metadata>,
) -> io::Result<Option<Duration>> {
let fd = File::open(path)?;
let matroska = matroska::Matroska::open(fd).map_err(|err| match err {
MatroskaError::Io(io) => io,
MatroskaError::UTF8(utf8) => io::Error::new(io::ErrorKind::InvalidData, utf8),
e => io::Error::new(io::ErrorKind::InvalidData, e),
})?;
match matroska.info.duration {
Some(duration) => {
return Ok(Some(Duration {
length: duration.as_secs() as usize,
}))
}
None => return Ok(None),
}
}
}
#[cfg(test)]
mod test {
use super::MkvDurationExtractor;
use crate::util::duration::DurationExtractor;
use crate::util::Duration;
use std::error::Error;
use std::path::PathBuf;
#[test]
fn test_success() -> Result<(), Box<dyn Error>> {
let path_string =
std::env::var("CARGO_MANIFEST_DIR")? + "/resources/test/" + "video/rust-logo-blk.mkv";
let path = PathBuf::from(path_string);
assert_eq!(
MkvDurationExtractor.try_read_duration(&path, &None)?,
Some(Duration { length: 1 }),
);
Ok(())
}
}
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