pub const HEADER_LEN: usize = 12;
pub const SAMPLE_RATE: u32 = 48000;

/// A readable audio source.
pub trait AudioSource: Send {
    fn is_stereo(&mut self) -> bool;

    fn read_frame(&mut self, buffer: &mut [i16]) -> Option<usize>;
}

/// A receiver for incoming audio.
pub trait AudioReceiver: Send {
    fn speaking_update(&mut self, ssrc: u32, user_id: u64, speaking: bool);

    fn voice_packet(&mut self,
                    ssrc: u32,
                    sequence: u16,
                    timestamp: u32,
                    stereo: bool,
                    data: &[i16]);
}