lrc 0.2.0

A pure Rust implementation of LyRiCs which is a computer file format that synchronizes song lyrics with an audio file.
Documentation 
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/*!
# LRC

A pure Rust implementation of LyRiCs which is a computer file format that synchronizes song lyrics with an audio file.

## Examples

```rust
use lrc::{Lyrics, TimeTag};

let mut lyrics = Lyrics::new();

lyrics.metadata.set_title("Let's Twist Again").unwrap();
lyrics.metadata.set_album("Hits Of The 60's - Vol. 2 – Oldies").unwrap();

lyrics.add_timed_line(TimeTag::from_str("00:12.00").unwrap(), "Naku Penda Piya-Naku Taka Piya-Mpenziwe").unwrap();
lyrics.add_timed_line(TimeTag::from_str("00:15.30").unwrap(), "Some more lyrics").unwrap();


assert_eq!(
    r"[al: Hits Of The 60's - Vol. 2 – Oldies]
[ti: Let's Twist Again]

[00:12.00]Naku Penda Piya-Naku Taka Piya-Mpenziwe
[00:15.30]Some more lyrics",
    lyrics.to_string()
);
```

```rust
use lrc::{Lyrics, TimeTag};

let lyrics = Lyrics::from_str(r"[00:12.00][01:15.00]Naku Penda Piya-Naku Taka Piya-Mpenziwe
[00:15.30][01:18.00]Some more lyrics ...").unwrap();

assert_eq!(
    Some("Naku Penda Piya-Naku Taka Piya-Mpenziwe"),
    lyrics.line_at(TimeTag::from_str("00:13.00").unwrap())
);

let shifted = lyrics.shifted(1000);

assert_eq!(
    Some("Naku Penda Piya-Naku Taka Piya-Mpenziwe"),
    lyrics.line_at(TimeTag::from_str("00:12.00").unwrap())
);

assert_eq!(None, shifted.line_at(TimeTag::from_str("00:12.00").unwrap()));

assert_eq!(
    Some("Naku Penda Piya-Naku Taka Piya-Mpenziwe"),
    shifted.line_at(TimeTag::from_str("00:13.00").unwrap())
);
```

```rust
use std::io::Cursor;

use lrc::Lyrics;

let lyrics = Lyrics::from_reader(Cursor::new("[ti:Let's Twist Again]\n[00:12.00]Line")).unwrap();

assert_eq!(Some("Let's Twist Again"), lyrics.metadata.title());

let mut output = Vec::new();
lyrics.to_writer(&mut output).unwrap();

assert_eq!("[ti: Let's Twist Again]\n\n[00:12.00]Line", String::from_utf8(output).unwrap());
```
*/

mod error;
/// Input and output helpers for `Lyrics`.
mod io;
mod lyrics;
/// Metadata helpers and storage.
pub mod metadata;
/// LRC tag types.
pub mod tags;
mod timestamp;

pub use error::*;
pub use lyrics::*;
pub use metadata::*;
pub use tags::*;