install go2rtc on bob

installs_on_host/go2rtc/pkg/wyze/backchannel.go

@@ -0,0 +1,55 @@
+package wyze
+
+import (
+	"fmt"
+
+	"github.com/AlexxIT/go2rtc/pkg/aac"
+	"github.com/AlexxIT/go2rtc/pkg/core"
+	"github.com/AlexxIT/go2rtc/pkg/tutk"
+	"github.com/pion/rtp"
+)
+
+func (p *Producer) AddTrack(media *core.Media, codec *core.Codec, track *core.Receiver) error {
+	if err := p.client.StartIntercom(); err != nil {
+		return fmt.Errorf("wyze: failed to enable intercom: %w", err)
+	}
+
+	// Get the camera's audio codec info (what it sent us = what it accepts)
+	tutkCodec, sampleRate, channels := p.client.GetBackchannelCodec()
+	if tutkCodec == 0 {
+		return fmt.Errorf("wyze: no audio codec detected from camera")
+	}
+
+	if p.client.verbose {
+		fmt.Printf("[Wyze] Intercom enabled, using codec=0x%04x rate=%d ch=%d\n", tutkCodec, sampleRate, channels)
+	}
+
+	sender := core.NewSender(media, track.Codec)
+
+	// Track our own timestamp - camera expects timestamps starting from 0
+	// and incrementing by frame duration in microseconds
+	var timestamp uint32 = 0
+	samplesPerFrame := tutk.GetSamplesPerFrame(tutkCodec)
+	frameDurationUS := samplesPerFrame * 1000000 / sampleRate
+
+	sender.Handler = func(pkt *rtp.Packet) {
+		if err := p.client.WriteAudio(tutkCodec, pkt.Payload, timestamp, sampleRate, channels); err == nil {
+			p.Send += len(pkt.Payload)
+		}
+		timestamp += frameDurationUS
+	}
+
+	switch track.Codec.Name {
+	case core.CodecAAC:
+		if track.Codec.IsRTP() {
+			sender.Handler = aac.RTPToADTS(codec, sender.Handler)
+		} else {
+			sender.Handler = aac.EncodeToADTS(codec, sender.Handler)
+		}
+	}
+
+	sender.HandleRTP(track)
+	p.Senders = append(p.Senders, sender)
+
+	return nil
+}