install go2rtc on bob

installs_on_host/go2rtc/pkg/webrtc/producer.go

@@ -0,0 +1,49 @@
+package webrtc
+
+import (
+	"github.com/AlexxIT/go2rtc/pkg/core"
+	"github.com/pion/webrtc/v4"
+)
+
+func (c *Conn) GetTrack(media *core.Media, codec *core.Codec) (*core.Receiver, error) {
+	core.Assert(media.Direction == core.DirectionRecvonly)
+
+	for _, track := range c.Receivers {
+		if track.Codec == codec {
+			return track, nil
+		}
+	}
+
+	switch c.Mode {
+	case core.ModePassiveConsumer: // backchannel from browser
+		// set codec for consumer recv track so remote peer should send media with this codec
+		params := webrtc.RTPCodecParameters{
+			RTPCodecCapability: webrtc.RTPCodecCapability{
+				MimeType:  MimeType(codec),
+				ClockRate: codec.ClockRate,
+				Channels:  uint16(codec.Channels),
+			},
+			PayloadType: 0, // don't know if this necessary
+		}
+
+		tr := c.getTranseiver(media.ID)
+
+		_ = tr.SetCodecPreferences([]webrtc.RTPCodecParameters{params})
+
+	case core.ModePassiveProducer, core.ModeActiveProducer:
+		// Passive producers: OBS Studio via WHIP or Browser
+		// Active producers: go2rtc as WebRTC client or WebTorrent
+
+	default:
+		panic(core.Caller())
+	}
+
+	track := core.NewReceiver(media, codec)
+	c.Receivers = append(c.Receivers, track)
+	return track, nil
+}
+
+func (c *Conn) Start() error {
+	c.closed.Wait()
+	return nil
+}