From ca77df8212997862199cfda60b9c8b39b211000f Mon Sep 17 00:00:00 2001
From: cnderrauber <zengjie9004@gmail.com>
Date: Thu, 24 Oct 2024 16:59:24 +0800
Subject: [PATCH] warn for multiple dd ext (#3135)

* warn for multiple dd ext

* unused
---
 pkg/sfu/buffer/buffer.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/pkg/sfu/buffer/buffer.go b/pkg/sfu/buffer/buffer.go
index ea9f30eec..e0cbe66aa 100644
--- a/pkg/sfu/buffer/buffer.go
+++ b/pkg/sfu/buffer/buffer.go
@@ -134,7 +134,6 @@ type Buffer struct {
 	packetNotFoundCount   atomic.Uint32
 	packetTooOldCount     atomic.Uint32
 	extPacketTooMuchCount atomic.Uint32
-	invalidPacketCount    atomic.Uint32
 
 	primaryBufferForRTX *Buffer
 	rtxPktBuf           []byte
@@ -231,6 +230,10 @@ func (b *Buffer) Bind(params webrtc.RTPParameters, codec webrtc.RTPCodecCapabili
 		switch ext.URI {
 		case dd.ExtensionURI:
 			if IsSvcCodec(codec.MimeType) {
+				if b.ddExtID != 0 {
+					b.logger.Warnw("multiple dependency descriptor extensions found", nil, "id", ext.ID, "previous", b.ddExtID)
+					continue
+				}
 				b.ddExtID = uint8(ext.ID)
 				frc := NewFrameRateCalculatorDD(b.clockRate, b.logger)
 				for i := range b.frameRateCalculator {