bevy/crates/bevy_audio/src/audio_source.rs

use anyhow::Result;
use bevy_asset::AssetLoader;
use std::{sync::Arc, path::Path};

#[derive(Clone)]
pub struct AudioSource {
    pub bytes: Arc<Vec<u8>>,
}

impl AsRef<[u8]> for AudioSource {
    fn as_ref(&self) -> &[u8] {
        &self.bytes
    }
}

#[derive(Default)]
pub struct Mp3Loader;

impl AssetLoader<AudioSource> for Mp3Loader {
    fn from_bytes(&self, _asset_path: &Path, bytes: Vec<u8>) -> Result<AudioSource> {
        Ok(AudioSource { bytes: Arc::new(bytes) })
    }
    fn extensions(&self) -> &[&str] {
        static EXTENSIONS: &[&str] = &["mp3"];
        EXTENSIONS
    }
}