Add raw song buffer constructor
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src/song.rs
43
src/song.rs
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@ -315,6 +315,38 @@ impl Song {
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})
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}
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/// Returns a decoded [Song] given an array of samples, or an error if the song
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/// could not be analyzed for some reason.
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///
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/// # Arguments
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///
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/// * `samples` - A [Vec] of samples at [SAMPLE_RATE].
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///
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/// # Errors
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///
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/// This function will return an error if the analysis could not be conducted for some reason.
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///
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/// The error type returned should give a hint as to whether it was a
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/// decoding ([DecodingError](BlissError::DecodingError)) or an analysis
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/// ([AnalysisError](BlissError::AnalysisError)) error.
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pub fn from_samples(samples: Vec<f32>) -> BlissResult<Self> {
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let raw_song = Song::decode_samples(samples)?;
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Ok(Song {
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path: raw_song.path,
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artist: raw_song.artist,
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album_artist: raw_song.album_artist,
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title: raw_song.title,
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album: raw_song.album,
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track_number: raw_song.track_number,
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genre: raw_song.genre,
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duration: raw_song.duration,
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analysis: Song::analyze(&raw_song.sample_array)?,
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features_version: FEATURES_VERSION,
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cue_info: None,
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})
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}
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/**
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* Analyze a song decoded in `sample_array`, with one channel @ 22050 Hz.
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*
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@ -421,6 +453,17 @@ impl Song {
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.unwrap()
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}
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pub(crate) fn decode_samples(samples: Vec<f32>) -> BlissResult<InternalSong> {
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let duration_seconds = samples.len() as f32 / SAMPLE_RATE as f32;
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let song = InternalSong {
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path: "".into(),
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duration: Duration::from_nanos((duration_seconds * 1e9_f32).round() as u64),
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sample_array: samples,
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..Default::default()
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};
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Ok(song)
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}
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pub(crate) fn decode(path: &Path) -> BlissResult<InternalSong> {
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let registry = symphonia::default::get_codecs();
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let probe = symphonia::default::get_probe();
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