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MEDIASOUP_PROTOCOL.md

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mediasoup protocol

List of messages (requests/responses/notifications) that must be exchanged between client and server side of the mediasoup based application. No signaling protocol is provided but just message payloads. The application is responsible of sending and receiving these messages.

From client to server

Messages generated by the client-side Room instance that must be given to the corresponding server-side Room or Peer instance (depending on the target field).

queryRoom

Get info about the server-side Room.

Request:

{
  method: 'queryRoom',
  target: 'room'
}

Response:

{
  rtpCapabilities: {},
  mandatoryCodecPayloadTypes: []
}

join

Create a server-side Peer. Other peers will be notified with a newPeer notification.

Request:

{
  method: 'join',
  target: 'room',
  peerName: 'myname',
  rtpCapabilities: {},
  appData: Any
}

Response:

{
  peers: []
}

leave

Close the server-side Room. Other peers will be notified with a peerClosed notification.

Notification:

{
  method: 'leave',
  target: 'peer',
  notification: true,
  appData: Any
}

createTransport

Create a server-side Transport.

Request:

{
  method: 'createTransport',
  target: 'peer',
  id: 1111,
  direction: 'send', // 'send'/'recv'.
  options: {},
  dtlsParameters: {}, // Optional.
  appData: Any
}

Response:

{
  iceParameters: {},
  iceCandidates: [],
  dtlsParameters: {}
}

updateTransport

Provide pending local parameters (if needed) to a server-side Transport.

Notification:

{
  method: 'updateTransport',
  target: 'peer',
  notification: true,
  id: 1111,
  dtlsParameters: {}
}

restartTransport

Request the server-side Transport to generate new values for its ICE userFragment and password.

Request:

{
  method: 'restartTransport',
  target: 'peer',
  id: 1111
}

Response:

{
  iceParameters: {}
}

closeTransport

Close a server-side Transport.

Notification:

{
  method: 'closeTransport',
  target: 'peer',
  notification: true,
  id: 1111,
  appData: Any
}

enableTransportStats

Enable periodic transport stats retrieval.

Notification:

{
  method: 'enableTransportStats',
  id: 3333,
  interval: 1
}

disableTransportStats

Disable periodic transport stats retrieval.

Notification:

{
  method: 'disableTransportStats',
  id: 3333,
}

createProducer

Create a server-side Producer for sending media over the indicate Transport. Other peers will be notified with a newConsumer notification.

Request:

{
  method: 'createProducer',
  target: 'peer',
  id: 2222,
  kind: 'audio',
  transportId: 1111,
  rtpParameters: {},
  paused: false,
  appData: Any
}

Response: (empty)

updateProducer

Just for libwebrtc based devices (no replaceTrack() support). Indicates that the Producer has changed its sending RTP parameters (in fact, just the SSRCs).

Notification:

{
  method: 'updateProducer',
  target: 'peer',
  notification: true,
  id: 2222,
  rtpParameters: {}
}

pauseProducer

Pause a server-side Producer. Other peers will be notified with a consumerPaused notification.

Notification:

{
  method: 'pauseProducer',
  target: 'peer',
  notification: true,
  id: 2222,
  appData: Any
}

resumeProducer

Resume a server-side Producer. Other peers will be notified with a consumerResumed notification.

Notification:

{
  method: 'resumeProducer',
  target: 'peer',
  notification: true,
  id: 2222,
  appData: Any
}

closeProducer

Close a server-side Producer. Other peers will be notified with a consumerClosed notification.

Notification:

{
  method: 'closeProducer',
  target: 'peer',
  notification: true,
  id: 2222,
  appData: Any
}

enableProducerStats

Enable periodic producer stats retrieval.

Notification:

{
  method: 'enableProducerStats',
  id: 3333,
  interval: 1
}

disableProducerStats

Disable periodic producer stats retrieval.

Notification:

{
  method: 'disableProducerStats',
  id: 3333,
}

enableConsumer

Enable the reception of media from a server-side Consumer.

Request:

{
  method: 'enableConsumer',
  target: 'peer',
  id: 3333,
  transportId: 9999,
  paused: false,
  preferredProfile: 'low'
}

Response:

{
  paused: false,
  preferredProfile: null,
  effectiveProfile: 'default'
}

pauseConsumer

Pause the reception of media from a server-side Consumer.

Notification:

{
  method: 'pauseConsumer',
  target: 'peer',
  notification: true,
  id: 3333,
  appData: Any
}

resumeConsumer

Resume the reception of media from a server-side Consumer.

Notification:

{
  method: 'resumeConsumer',
  target: 'peer',
  notification: true,
  id: 3333,
  appData: Any
}

setConsumerPreferredProfile

Set the desired receiving profile.

Notification:

{
  method: 'setConsumerPreferredProfile',
  notification: true,
  id: 3333,
  profile: 'high'
}

enableConsumerStats

Enable periodic consumer stats retrieval.

Notification:

{
  method: 'enableConsumerStats',
  id: 3333,
  interval: 1
}

disableConsumerStats

Disable periodic consumer stats retrieval.

Notification:

{
  method: 'disableConsumerStats',
  id: 3333,
}

From server to client

Messages generated by the server-side Peer instance that must be given to the client-side Room instance.

closed

The server-side Room or my server-side Peer has been closed in the server.

Notification:

{
  method: 'closed',
  target: 'peer',
  notification: true,
  appData: Any
}

transportClosed

A server-side Transport has been closed in the server.

Notification:

{
  method: 'transportClosed',
  target: 'peer',
  notification: true,
  id: 1111,
  appData: Any
}

transportStats

Transport stats, enabled via enableTransportStats.

Notification:

{
  method: 'transportStats',
  target: 'peer',
  notification: true,
  id: 3333,
  stats: []
}

producerPaused

A server-side Producer has been paused in the server.

Notification:

{
  method: 'producerPaused',
  target: 'peer',
  notification: true,
  id: 2222,
  appData: Any
}

producerResumed

A server-side Producer has been resumed in the server.

Notification:

{
  method: 'producerResumed',
  target: 'peer',
  notification: true,
  id: 2222,
  appData: Any
}

producerClosed

A server-side Producer has been closed in the server.

Notification:

{
  method: 'producerClosed',
  target: 'peer',
  notification: true,
  id: 2222,
  appData: Any
}

producerStats

Producer stats, enabled via enableProducerStats.

Notification:

{
  method: 'producerStats',
  target: 'peer',
  notification: true,
  id: 3333,
  stats: []
}

newPeer

A new Peer has joined the server-side Room.

Notification:

{
  method: 'newPeer',
  target: 'peer',
  notification: true,
  name: 'alice',
  consumers:
  [
    {
      id: 5555,
      kind: 'audio',
      rtpParameters: {},
      paused: false,
      appData: Any
    }
  ],
  appData: Any
}

peerClosed

A server-side Peer has been closed (it may have left the room or his server-side Peer has been closed in the server).

Notification:

{
  method: 'peerClosed',
  target: 'peer',
  notification: true,
  name: 'alice',
  appData: Any
}

newConsumer

A new server-side Consumer has been created.

Notification:

{
  method: 'newConsumer',
  target: 'peer',
  notification: true,
  id: 3333,
  kind: 'video',
  peerName: 'alice',
  rtpParameters: {},
  paused: false,
  preferredProfile: 'high',
  effectiveProfile: 'medium',
  appData: Any
}

consumerPaused

A server-side Consumer has been paused (its originating Peer may have paused it, or his server-side Producer may have been paused in the server, or my associated Consumer may have been paused in the server).

Notification:

{
  method: 'consumerPaused',
  target: 'peer',
  notification: true,
  id: 3333,
  peerName: 'alice',
  appData: Any
}

consumerResumed

A server-side Consumer has been resumed (its originating Peer may have resumed it, or his server-side Producer may have been resumed in the server, or my associated Consumer may have been resumed in the server).

Notification:

{
  method: 'consumerResumed',
  target: 'peer',
  notification: true,
  id: 3333,
  peerName: 'alice',
  appData: Any
}

consumerPreferredProfileSet

A server-side Consumer has set its preferred receiving profile.

Notification:

{
  method: 'consumerPreferredProfileSet',
  target: 'peer',
  notification: true,
  id: 3333,
  peerName: 'alice',
  profile: 'medium'
}

consumerEffectiveProfileChanged

The effective receiving profile in a server-side Consumer changed.

Notification:

{
  method: 'consumerEffectiveProfileChanged',
  target: 'peer',
  notification: true,
  id: 3333,
  peerName: 'alice',
  profile: 'high'
}

consumerStats

Consumer stats, enabled via enableConsumerStats.

Notification:

{
  method: 'consumerStats',
  target: 'peer',
  notification: true,
  id: 3333,
  stats: []
}