Fix PCM audio quality for WebRTC

pkg/webrtc/consumer.go

@@ -64,16 +64,17 @@ func (c *Conn) AddTrack(media *core.Media, codec *core.Codec, track *core.Receiv
 		}
 
 	case core.CodecPCMA, core.CodecPCMU, core.CodecPCM, core.CodecPCML:
+		// Fix audio quality https://github.com/AlexxIT/WebRTC/issues/500
+		// should be before ResampleToG711, because it will be called last
+		sender.Handler = pcm.RepackG711(false, sender.Handler)
+
 		if codec.ClockRate == 0 {
 			if codec.Name == core.CodecPCM || codec.Name == core.CodecPCML {
 				codec.Name = core.CodecPCMA
 			}
 			codec.ClockRate = 8000
 			sender.Handler = pcm.ResampleToG711(track.Codec, 8000, sender.Handler)
 		}
-
-		// Fix audio quality https://github.com/AlexxIT/WebRTC/issues/500
-		sender.Handler = pcm.RepackG711(false, sender.Handler)
 	}
 
 	// TODO: rewrite this dirty logic