Add Hass API source for WebRTC cameras

pkg/webrtc/client.go

@@ -24,6 +24,9 @@ func (c *Conn) CreateOffer(medias []*core.Media) (string, error) {
 		case core.DirectionSendRecv:
 			// default transceiver is sendrecv
 			_, err = c.pc.AddTransceiverFromTrack(NewTrack(media.Kind))
+		default:
+			// Nest cameras require data channel
+			_, err = c.pc.CreateDataChannel(media.Kind, nil)
 		}
 
 		if err != nil {

pkg/webrtc/conn.go

@@ -148,6 +148,17 @@ func (c *Conn) getTranseiver(mid string) *webrtc.RTPTransceiver {
 	return nil
 }
 
+func (c *Conn) getSenderTrack(mid string) *Track {
+	if tr := c.getTranseiver(mid); tr != nil {
+		if s := tr.Sender(); s != nil {
+			if t := s.Track().(*Track); t != nil {
+				return t
+			}
+		}
+	}
+	return nil
+}
+
 func (c *Conn) getMediaCodec(remote *webrtc.TrackRemote) (*core.Media, *core.Codec) {
 	for _, tr := range c.pc.GetTransceivers() {
 		// search Transeiver for this TrackRemote

pkg/webrtc/consumer.go

@@ -2,6 +2,7 @@ package webrtc
 
 import (
 	"encoding/json"
+	"errors"
 	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/h264"
 	"github.com/AlexxIT/go2rtc/pkg/h265"
@@ -31,7 +32,11 @@ func (c *Conn) AddTrack(media *core.Media, codec *core.Codec, track *core.Receiv
 		panic(core.Caller())
 	}
 
-	localTrack := c.getTranseiver(media.ID).Sender().Track().(*Track)
+	localTrack := c.getSenderTrack(media.ID)
+	if localTrack == nil {
+		return errors.New("webrtc: can't get track")
+	}
+
 	payloadType := codec.PayloadType
 
 	sender := core.NewSender(media, codec)