Enum Decoder 

pub enum Decoder {
    G711(G711Codec),
    Opus(OpusDecoder),
}

The decode half of a negotiated call codec.

The loss-recovery calls are uniform so a receive loop can drive them without codec branches: for G.711 they are no-ops (append nothing, return 0) because G.711 carries no redundancy and its historical loss behavior — silence by absence — is the correct one to keep.

Variants

G711(G711Codec)

PCMU or PCMA.

Opus(OpusDecoder)

Opus, with in-band FEC recovery and PLC.

Implementations

impl Decoder

pub fn pcm_sample_rate(&self) -> u32

The PCM rate decoded frames come out at: 8 kHz for G.711, 16 kHz for Opus.

pub fn decode( &mut self, payload: &[u8], out: &mut Vec<i16>, ) -> Result<usize, CoreError>

Decode one received payload, appending PCM to out and returning the sample count. Use the returned length — Opus peers choose their own frame size.

pub fn recover_lost( &mut self, next_payload: &[u8], out: &mut Vec<i16>, ) -> Result<usize, CoreError>

Recover a single lost frame from the packet that followed it (drive this on a one-packet RTP sequence gap). Opus decodes the next packet’s in-band FEC; G.711 has nothing to recover and appends nothing.

pub fn conceal(&mut self, out: &mut Vec<i16>) -> Result<usize, CoreError>

Produce one concealment frame for a packet that is not coming back (multi-packet gap). Opus extrapolates via PLC; G.711 appends nothing — absence already sounds like silence.