Add comments and improve repackaging

pkg/tuya/client.go

@@ -161,9 +161,8 @@ func Dial(rawURL string) (core.Producer, error) {
 		}
 
 		if client.isHEVC {
-			// We need to replace the SDP codecs with the real ones from Skill.
-			// The actual media comes via DataChannel, not RTP tracks.
-
+			// Tuya responds with H264/90000 even for HEVC streams
+			// So we need to replace video codecs with HEVC ones from API
 			for _, media := range client.conn.Medias {
 				if media.Kind == core.KindVideo {
 					codecs := client.api.GetVideoCodecs()
@@ -173,6 +172,9 @@ func Dial(rawURL string) (core.Producer, error) {
 				}
 			}
 
+			// Audio codecs from API as well
+			// Tuya responds with multiple audio codecs (PCMU, PCMA)
+			// But the quality is bad if we use PCMU and skill only has PCMA
 			for _, media := range client.conn.Medias {
 				if media.Kind == core.KindAudio {
 					codecs := client.api.GetAudioCodecs()
@@ -356,6 +358,8 @@ func (c *Client) AddTrack(media *core.Media, codec *core.Codec, track *core.Rece
 
 	sender := core.NewSender(media, codec)
 
+	switch track.Codec.Name {
+	case core.CodecPCMA, core.CodecPCMU, core.CodecPCM, core.CodecPCML:
 		// Frame size affects audio delay with Tuya cameras:
 		// Browser sends standard 20ms frames (160 bytes for G.711), but this causes
 		// up to 4s delay on some Tuya cameras. Increasing to 240 bytes (30ms) reduces
@@ -394,6 +398,13 @@ func (c *Client) AddTrack(media *core.Media, codec *core.Codec, track *core.Rece
 			}
 		}
 
+	default:
+		sender.Handler = func(packet *rtp.Packet) {
+			c.conn.Send += packet.MarshalSize()
+			_ = localTrack.WriteRTP(payloadType, packet)
+		}
+	}
+
 	sender.HandleRTP(track)
 	c.conn.Senders = append(c.conn.Senders, sender)