session_manager_create_sdp

session_manager_create_sdp.kt

// Copyright 2023 Stream.IO, Inc. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0

override fun onSessionScreenReady() {
  peerConnection.connection.addTrack(localVideoTrack)
  peerConnection.connection.addTrack(localAudioTrack)
  sessionManagerScope.launch {
    // sending local video track to show local video from start
    _localVideoSinkFlow.emit(localVideoTrack)

    if (offer != null) {
      sendAnswer()
    } else {
      sendOffer()
    }
  }
}

private suspend fun sendOffer() {
  val offer = peerConnection.createOffer().getOrThrow()
  val result = peerConnection.setLocalDescription(offer)
  result.onSuccess {
    signalingClient.sendCommand(SignalingCommand.OFFER, offer.description)
  }
  logger.d { "[SDP] send offer: ${offer.stringify()}" }
}

private suspend fun sendAnswer() {
  peerConnection.setRemoteDescription(
    SessionDescription(SessionDescription.Type.OFFER, offer)
  )
  val answer = peerConnection.createAnswer().getOrThrow()
  val result = peerConnection.setLocalDescription(answer)
  result.onSuccess {
    signalingClient.sendCommand(SignalingCommand.ANSWER, answer.description)
  }
  logger.d { "[SDP] send answer: ${answer.stringify()}" }
}