Module codec 

Audio codec implementations for RTP media.

This module provides encoding and decoding for common VoIP codecs:

• G.711 μ-law (PCMU): PT 0, 8kHz, widely supported
• G.711 A-law (PCMA): PT 8, 8kHz, common in Europe
• Opus: PT 111, 48kHz, modern high-quality codec (feature-gated)

Example

use rtp_engine::codec::{CodecType, create_encoder, create_decoder};

let mut encoder = create_encoder(CodecType::Pcmu).unwrap();
let mut decoder = create_decoder(CodecType::Pcmu).unwrap();

// Encode 160 samples (20ms at 8kHz)
let pcm: Vec<i16> = vec![0; 160];
let mut encoded = Vec::new();
encoder.encode(&pcm, &mut encoded);

// Decode back to PCM
let mut decoded = Vec::new();
decoder.decode(&encoded, &mut decoded);

Structs

OpusDecoder

Opus decoder with integrated 48kHz→8kHz resampling.

OpusEncoder

Opus encoder with integrated 8kHz→48kHz resampling.

PcmaDecoder

G.711 A-law (PCMA) decoder.

PcmaEncoder

G.711 A-law (PCMA) encoder.

PcmuDecoder

G.711 μ-law (PCMU) decoder.

PcmuEncoder

G.711 μ-law (PCMU) encoder.

Enums

CodecType

Supported audio codec types.

Traits

AudioDecoder

Trait for audio decoders.

AudioEncoder

Trait for audio encoders.

Functions

create_decoder

Create a decoder for the specified codec type.

create_encoder

Create an encoder for the specified codec type.

negotiate_codec

Negotiate a codec from SDP answer.