rosa 0.1.0

Audio feature extraction library matching librosa output
Documentation 
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mod common;

use rosa::matrix::{Aggregate, Matrix, sync};

#[test]
fn test_sync_mean_matches_librosa() {
    let ref_data = common::load_audio_reference("sync.json");

    let rows = ref_data["input_rows"].as_u64().unwrap() as usize;
    let cols = ref_data["input_cols"].as_u64().unwrap() as usize;
    let input_flat: Vec<f64> = serde_json::from_value(ref_data["input"].clone()).unwrap();
    let input = Matrix::from_vec(input_flat, rows, cols);

    let frames: Vec<usize> = serde_json::from_value::<Vec<u64>>(ref_data["frames"].clone())
        .unwrap()
        .into_iter()
        .map(|f| f as usize)
        .collect();

    let expected_rows = ref_data["mean_rows"].as_u64().unwrap() as usize;
    let expected_cols = ref_data["mean_cols"].as_u64().unwrap() as usize;
    let expected: Vec<f64> = serde_json::from_value(ref_data["mean"].clone()).unwrap();

    let result = sync(&input, &frames, Aggregate::Mean);
    assert_eq!(
        result.shape(),
        (expected_rows, expected_cols),
        "sync mean shape mismatch"
    );
    common::assert_approx_eq(result.as_slice(), &expected, 1e-10, "sync_mean");
}

#[test]
fn test_sync_median_matches_librosa() {
    let ref_data = common::load_audio_reference("sync.json");

    let rows = ref_data["input_rows"].as_u64().unwrap() as usize;
    let cols = ref_data["input_cols"].as_u64().unwrap() as usize;
    let input_flat: Vec<f64> = serde_json::from_value(ref_data["input"].clone()).unwrap();
    let input = Matrix::from_vec(input_flat, rows, cols);

    let frames: Vec<usize> = serde_json::from_value::<Vec<u64>>(ref_data["frames"].clone())
        .unwrap()
        .into_iter()
        .map(|f| f as usize)
        .collect();

    let expected_rows = ref_data["median_rows"].as_u64().unwrap() as usize;
    let expected_cols = ref_data["median_cols"].as_u64().unwrap() as usize;
    let expected: Vec<f64> = serde_json::from_value(ref_data["median"].clone()).unwrap();

    let result = sync(&input, &frames, Aggregate::Median);
    assert_eq!(
        result.shape(),
        (expected_rows, expected_cols),
        "sync median shape mismatch"
    );
    common::assert_approx_eq(result.as_slice(), &expected, 1e-10, "sync_median");
}