Function parse_mp3

native/shared/src/audio.rs:321–345

(data: &[u8])

/// Parse an MP3 file into SoundData.
#[cfg(feature = "mp3")]
pub fn parse_mp3(data: &[u8]) -> Option<SoundData> {
    let mut decoder = minimp3::Decoder::new(std::io::Cursor::new(data));
    let mut samples = Vec::new();
    let mut sample_rate = 0u32;
    let mut channels = 0u16;

    loop {
        match decoder.next_frame() {
            Ok(frame) => {
                if sample_rate == 0 {
                    sample_rate = frame.sample_rate as u32;
                    channels = frame.channels as u16;
                }
                for &s in &frame.data {
                    samples.push(s as f32 / 32768.0);
                }
            }
            Err(minimp3::Error::Eof) => break,
            Err(_) => return None,
        }
    }

    if samples.is_empty() { return None; }
    Some(SoundData { samples, sample_rate, channels })
}

/// Parse an OGG Vorbis file into SoundData.
pub fn parse_ogg(data: &[u8]) -> Option<SoundData> {