use crate::{Analysis, BlissError, BlissResult, Song, FEATURES_VERSION, SAMPLE_RATE};
use rcue::cue::{Cue, Track};
use rcue::parser::parse_from_file;
use std::path::{Path, PathBuf};
use std::time::Duration;
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
#[derive(Default, Debug, PartialEq, Eq, Clone)]
pub struct CueInfo {
pub cue_path: PathBuf,
pub audio_file_path: PathBuf,
}
pub struct BlissCue {
cue: Cue,
cue_path: PathBuf,
}
#[allow(missing_docs)]
#[derive(Default, Debug, PartialEq, Clone)]
struct BlissCueFile {
sample_array: Vec<f32>,
album: Option<String>,
artist: Option<String>,
genre: Option<String>,
tracks: Vec<Track>,
cue_path: PathBuf,
audio_file_path: PathBuf,
}
impl BlissCue {
pub fn songs_from_path<P: AsRef<Path>>(path: P) -> BlissResult<Vec<BlissResult<Song>>> {
let cue = BlissCue::from_path(&path)?;
let cue_files = cue.files();
let mut songs = Vec::new();
for cue_file in cue_files.into_iter() {
match cue_file {
Ok(f) => {
if !f.sample_array.is_empty() {
songs.extend_from_slice(&f.get_songs());
} else {
songs.push(Err(BlissError::DecodingError(
"empty audio file associated to CUE sheet".into(),
)));
}
}
Err(e) => songs.push(Err(e)),
}
}
Ok(songs)
}
fn from_path<P: AsRef<Path>>(path: P) -> BlissResult<Self> {
let cue = parse_from_file(&path.as_ref().to_string_lossy(), false).map_err(|e| {
BlissError::DecodingError(format!(
"when opening CUE file '{:?}': {:?}",
path.as_ref(),
e
))
})?;
Ok(BlissCue {
cue,
cue_path: path.as_ref().to_owned(),
})
}
fn files(&self) -> Vec<BlissResult<BlissCueFile>> {
let mut cue_files = Vec::new();
for cue_file in self.cue.files.iter() {
let audio_file_path = match &self.cue_path.parent() {
Some(parent) => parent.join(Path::new(&cue_file.file)),
None => PathBuf::from(cue_file.file.to_owned()),
};
let genre = self
.cue
.comments
.iter()
.find(|(c, _)| c == "GENRE")
.map(|(_, v)| v.to_owned());
let raw_song = Song::decode(Path::new(&audio_file_path));
if let Ok(song) = raw_song {
let bliss_cue_file = BlissCueFile {
sample_array: song.sample_array,
genre,
artist: self.cue.performer.to_owned(),
album: self.cue.title.to_owned(),
tracks: cue_file.tracks.to_owned(),
audio_file_path,
cue_path: self.cue_path.to_owned(),
};
cue_files.push(Ok(bliss_cue_file))
} else {
cue_files.push(Err(raw_song.unwrap_err()));
}
}
cue_files
}
}
impl BlissCueFile {
fn create_song(
&self,
analysis: BlissResult<Analysis>,
current_track: &Track,
duration: Duration,
index: usize,
) -> BlissResult<Song> {
if let Ok(a) = analysis {
let song = Song {
path: PathBuf::from(format!(
"{}/CUE_TRACK{:03}",
self.cue_path.to_string_lossy(),
index,
)),
album: self.album.to_owned(),
artist: current_track.performer.to_owned(),
album_artist: self.artist.to_owned(),
analysis: a,
duration,
genre: self.genre.to_owned(),
title: current_track.title.to_owned(),
track_number: Some(current_track.no.to_owned()),
features_version: FEATURES_VERSION,
cue_info: Some(CueInfo {
cue_path: self.cue_path.to_owned(),
audio_file_path: self.audio_file_path.to_owned(),
}),
};
Ok(song)
} else {
Err(analysis.unwrap_err())
}
}
fn get_songs(&self) -> Vec<BlissResult<Song>> {
let mut songs = Vec::new();
for (index, tuple) in (self.tracks[..]).windows(2).enumerate() {
let (current_track, next_track) = (tuple[0].to_owned(), tuple[1].to_owned());
if let Some((_, start_current)) = current_track.indices.get(0) {
if let Some((_, end_current)) = next_track.indices.get(0) {
let start_current = (start_current.as_secs_f32() * SAMPLE_RATE as f32) as usize;
let end_current = (end_current.as_secs_f32() * SAMPLE_RATE as f32) as usize;
let duration = Duration::from_secs_f32(
(end_current - start_current) as f32 / SAMPLE_RATE as f32,
);
let analysis = Song::analyze(&self.sample_array[start_current..end_current]);
let song = self.create_song(analysis, ¤t_track, duration, index + 1);
songs.push(song);
}
}
}
if let Some(last_track) = self.tracks.last() {
if let Some((_, start_current)) = last_track.indices.get(0) {
let start_current = (start_current.as_secs_f32() * SAMPLE_RATE as f32) as usize;
let duration = Duration::from_secs_f32(
(self.sample_array.len() - start_current) as f32 / SAMPLE_RATE as f32,
);
let analysis = Song::analyze(&self.sample_array[start_current..]);
let song = self.create_song(analysis, last_track, duration, self.tracks.len());
songs.push(song);
}
}
songs
}
}
#[cfg(test)]
mod tests {
use super::*;
use pretty_assertions::assert_eq;
#[test]
fn test_empty_cue() {
let songs = BlissCue::songs_from_path("data/empty.cue").unwrap();
let error = songs[0].to_owned().unwrap_err();
assert_eq!(
error,
BlissError::DecodingError("empty audio file associated to CUE sheet".to_string())
);
}
#[test]
fn test_cue_analysis() {
let songs = BlissCue::songs_from_path("data/testcue.cue").unwrap();
let expected = vec![
Ok(Song {
path: Path::new("data/testcue.cue/CUE_TRACK001").to_path_buf(),
analysis: Analysis {
internal_analysis: [
0.38463724,
-0.85219246,
-0.761946,
-0.8904667,
-0.63892543,
-0.73945934,
-0.8004017,
-0.8237293,
0.33865356,
0.32481194,
-0.35692245,
-0.6355889,
-0.29584837,
0.06431806,
0.21875131,
-0.58104205,
-0.9466792,
-0.94811195,
-0.9820919,
-0.9596871,
],
},
album: Some(String::from("Album for CUE test")),
artist: Some(String::from("David TMX")),
title: Some(String::from("Renaissance")),
genre: Some(String::from("Random")),
track_number: Some(String::from("01")),
features_version: FEATURES_VERSION,
album_artist: Some(String::from("Polochon_street")),
duration: Duration::from_secs_f32(11.066666603),
cue_info: Some(CueInfo {
cue_path: PathBuf::from("data/testcue.cue"),
audio_file_path: PathBuf::from("data/testcue.flac"),
}),
..Default::default()
}),
Ok(Song {
path: Path::new("data/testcue.cue/CUE_TRACK002").to_path_buf(),
analysis: Analysis {
internal_analysis: [
0.18622077,
-0.5989029,
-0.5554645,
-0.6343865,
-0.24163479,
-0.25766593,
-0.40616858,
-0.23334873,
0.76875293,
0.7785741,
-0.5075115,
-0.5272629,
-0.56706166,
-0.568486,
-0.5639081,
-0.5706943,
-0.96501005,
-0.96501285,
-0.9649896,
-0.96498996,
],
},
features_version: FEATURES_VERSION,
album: Some(String::from("Album for CUE test")),
artist: Some(String::from("Polochon_street")),
title: Some(String::from("Piano")),
genre: Some(String::from("Random")),
track_number: Some(String::from("02")),
album_artist: Some(String::from("Polochon_street")),
duration: Duration::from_secs_f64(5.853333473),
cue_info: Some(CueInfo {
cue_path: PathBuf::from("data/testcue.cue"),
audio_file_path: PathBuf::from("data/testcue.flac"),
}),
..Default::default()
}),
Ok(Song {
path: Path::new("data/testcue.cue/CUE_TRACK003").to_path_buf(),
analysis: Analysis {
internal_analysis: [
0.0024261475,
0.9874661,
0.97330654,
-0.9724426,
0.99678576,
-0.9961549,
-0.9840142,
-0.9269961,
0.7498772,
0.22429907,
-0.8355152,
-0.9977258,
-0.9977849,
-0.997785,
-0.99778515,
-0.997785,
-0.99999976,
-0.99999976,
-0.99999976,
-0.99999976,
],
},
album: Some(String::from("Album for CUE test")),
artist: Some(String::from("Polochon_street")),
title: Some(String::from("Tone")),
genre: Some(String::from("Random")),
track_number: Some(String::from("03")),
features_version: FEATURES_VERSION,
album_artist: Some(String::from("Polochon_street")),
duration: Duration::from_secs_f32(5.586666584),
cue_info: Some(CueInfo {
cue_path: PathBuf::from("data/testcue.cue"),
audio_file_path: PathBuf::from("data/testcue.flac"),
}),
..Default::default()
}),
Err(BlissError::DecodingError(String::from(
"while opening format for file 'data/not-existing.wav': \
ffmpeg::Error(2: No such file or directory).",
))),
];
assert_eq!(expected, songs);
}
}