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Pass webrtc sdp chan in newPeerHandler

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This commit is contained in:
Alexandre Iooss 2020-10-14 18:34:14 +02:00
parent f21ad568cc
commit 7d8c16fbb7
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GPG Key ID: 6C79278F3FCDCC02
1 changed files with 35 additions and 33 deletions
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68
stream/webrtc/webrtc.go
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@ -46,22 +46,24 @@ func GetNumberConnectedSessions(streamID string) int {
// newPeerHandler is called when server receive a new session description
// this initiates a WebRTC connection and return server description
func newPeerHandler(remoteSdp struct {
func newPeerHandler(localSdpChan chan webrtc.SessionDescription, remoteSdp struct {
StreamID string
RemoteDescription webrtc.SessionDescription
}, cfg *Options) webrtc.SessionDescription {
}, cfg *Options) {
// Create media engine using client SDP
mediaEngine := webrtc.MediaEngine{}
if err := mediaEngine.PopulateFromSDP(remoteSdp.RemoteDescription); err != nil {
log.Println("Failed to create new media engine", err)
return webrtc.SessionDescription{}
localSdpChan <- webrtc.SessionDescription{}
return
}
// Create a new PeerConnection
settingsEngine := webrtc.SettingEngine{}
if err := settingsEngine.SetEphemeralUDPPortRange(cfg.MinPortUDP, cfg.MaxPortUDP); err != nil {
log.Println("Failed to set min/max UDP ports", err)
return webrtc.SessionDescription{}
localSdpChan <- webrtc.SessionDescription{}
return
}
api := webrtc.NewAPI(
webrtc.WithMediaEngine(mediaEngine),
@ -72,7 +74,8 @@ func newPeerHandler(remoteSdp struct {
})
if err != nil {
log.Println("Failed to initiate peer connection", err)
return webrtc.SessionDescription{}
localSdpChan <- webrtc.SessionDescription{}
return
}
// Create video track
@ -80,11 +83,13 @@ func newPeerHandler(remoteSdp struct {
videoTrack, err := webrtc.NewTrack(payloadType, rand.Uint32(), "video", "pion", codec)
if err != nil {
log.Println("Failed to create new video track", err)
return webrtc.SessionDescription{}
localSdpChan <- webrtc.SessionDescription{}
return
}
if _, err = peerConnection.AddTrack(videoTrack); err != nil {
log.Println("Failed to add video track", err)
return webrtc.SessionDescription{}
localSdpChan <- webrtc.SessionDescription{}
return
}
// Create audio track
@ -92,33 +97,20 @@ func newPeerHandler(remoteSdp struct {
audioTrack, err := webrtc.NewTrack(payloadType, rand.Uint32(), "audio", "pion", codec)
if err != nil {
log.Println("Failed to create new audio track", err)
return webrtc.SessionDescription{}
localSdpChan <- webrtc.SessionDescription{}
return
}
if _, err = peerConnection.AddTrack(audioTrack); err != nil {
log.Println("Failed to add audio track", err)
return webrtc.SessionDescription{}
localSdpChan <- webrtc.SessionDescription{}
return
}
// Set the remote SessionDescription
if err = peerConnection.SetRemoteDescription(remoteSdp.RemoteDescription); err != nil {
log.Println("Failed to set remote description", err)
return webrtc.SessionDescription{}
}
// Create answer
answer, err := peerConnection.CreateAnswer(nil)
if err != nil {
log.Println("Failed to create answer", err)
return webrtc.SessionDescription{}
}
// Create channel that is blocked until ICE Gathering is complete
gatherComplete := webrtc.GatheringCompletePromise(peerConnection)
// Sets the LocalDescription, and starts our UDP listeners
if err = peerConnection.SetLocalDescription(answer); err != nil {
log.Println("Failed to set local description", err)
return webrtc.SessionDescription{}
localSdpChan <- webrtc.SessionDescription{}
return
}
streamID := remoteSdp.StreamID
@ -154,13 +146,23 @@ func newPeerHandler(remoteSdp struct {
}
})
// Block until ICE Gathering is complete, disabling trickle ICE
// we do this because we only can exchange one signaling message
// in a production application you should exchange ICE Candidates via OnICECandidate
<-gatherComplete
// Create answer
answer, err := peerConnection.CreateAnswer(nil)
if err != nil {
log.Println("Failed to create answer", err)
localSdpChan <- webrtc.SessionDescription{}
return
}
// Output the local description and send it to browser
return *peerConnection.LocalDescription()
// Sets the LocalDescription, and starts our UDP listeners
if err = peerConnection.SetLocalDescription(answer); err != nil {
log.Println("Failed to set local description", err)
localSdpChan <- webrtc.SessionDescription{}
return
}
// Send answer to client
localSdpChan <- answer
}
// Search for Codec PayloadType
@ -198,6 +200,6 @@ func Serve(remoteSdpChan chan struct {
for {
// Wait for incoming session description
// then send the local description to browser
localSdpChan <- newPeerHandler(<-remoteSdpChan, cfg)
newPeerHandler(localSdpChan, <-remoteSdpChan, cfg)
}
}