---
title: Functions
description: Public API reference for the WebRTC extension
---

## Extension Construction

| Function | Description |
|---|---|
| `New(streamingExt, config, opts...) (*Extension, error)` | Create the WebRTC extension with a streaming dependency |

## Peer Connections

| Function | Description |
|---|---|
| `NewPeerConnection(id, userID, config, logger) (PeerConnection, error)` | Create a new WebRTC peer connection |
| `NewLocalTrack(kind, id, label, logger) (MediaTrack, error)` | Create a local media track |

## Signaling

| Function | Description |
|---|---|
| `NewSignalingManager(streamingExt, logger) SignalingManager` | Create a signaling manager using streaming rooms |

## Call Rooms

| Function | Description |
|---|---|
| `NewMeshCallRoom(roomID, streamingRoom, logger, metrics, config) CallRoom` | Create a mesh (P2P) call room |
| `NewMeshCallRoomFromOptions(roomID, streamingRoom, logger, metrics, config) (CallRoom, error)` | Create a mesh room with validation |
| `NewSFUCallRoomFromOptions(roomID, streamingRoom, logger, metrics, config) (CallRoom, error)` | Create an SFU call room |

## SFU

| Function | Description |
|---|---|
| `NewSFURouter(roomID, logger, metrics) SFURouter` | Create an SFU media router |

## Quality

| Function | Description |
|---|---|
| `NewQualityMonitor(peerID, peer, config, logger, metrics) QualityMonitor` | Create a quality monitor for a peer |

## CallRoom Interface

| Method | Description |
|---|---|
| `Join(ctx, conn, options) error` | Add a participant to the call |
| `Leave(ctx, conn) error` | Remove a participant |
| `GetParticipants() []Participant` | List current participants |
| `GetParticipant(userID) (*Participant, error)` | Get a specific participant |

## PeerConnection Interface

| Method | Description |
|---|---|
| `CreateOffer() (*SessionDescription, error)` | Generate an SDP offer |
| `CreateAnswer() (*SessionDescription, error)` | Generate an SDP answer |
| `SetLocalDescription(sdp) error` | Set the local SDP |
| `SetRemoteDescription(sdp) error` | Set the remote SDP |
| `AddICECandidate(candidate) error` | Add an ICE candidate |
| `AddTrack(track) error` | Add a media track |
| `RemoveTrack(trackID) error` | Remove a media track |
| `CreateDataChannel(label, options) (DataChannel, error)` | Create a data channel |
| `GetStats() PeerStats` | Get connection statistics |
| `Close() error` | Close the peer connection |

## SignalingManager Interface

| Method | Description |
|---|---|
| `SendOffer(ctx, roomID, targetID, offer) error` | Send an SDP offer |
| `SendAnswer(ctx, roomID, targetID, answer) error` | Send an SDP answer |
| `SendICECandidate(ctx, roomID, targetID, candidate) error` | Send an ICE candidate |

## QualityMonitor Interface

| Method | Description |
|---|---|
| `Start(ctx) error` | Start monitoring |
| `Stop() error` | Stop monitoring |
| `GetQuality() CallQuality` | Get current quality assessment |
| `GetConnectionQuality() ConnectionQuality` | Get connection quality metrics |