Add support for transport wide sequence numbers

webrtc/video_engine/vie_receiver.cc

Index: webrtc/video_engine/vie_receiver.cc
diff --git a/webrtc/video_engine/vie_receiver.cc b/webrtc/video_engine/vie_receiver.cc
index 9e250800527b0779d4d9e1a83f02e1733688ab14..a3ef2cfc3c5aeb61f9c1a17983300212e56c6634 100644
--- a/webrtc/video_engine/vie_receiver.cc
+++ b/webrtc/video_engine/vie_receiver.cc
@@ -58,6 +58,7 @@ ViEReceiver::ViEReceiver(const int32_t channel_id,
       restored_packet_in_use_(false),
       receiving_ast_enabled_(false),
       receiving_cvo_enabled_(false),
+      receiving_tsn_enabled_(false),
       last_packet_log_ms_(-1) {
   assert(remote_bitrate_estimator);
 }
@@ -199,6 +200,22 @@ bool ViEReceiver::SetReceiveVideoRotationStatus(bool enable, int id) {
   }
 }
 
+bool ViEReceiver::SetReceiveTransportSequenceNumber(bool enable, int id) {
+  if (enable) {
+    if (rtp_header_parser_->RegisterRtpHeaderExtension(
+            kRtpExtensionTransportSequenceNumber, id)) {
+      receiving_tsn_enabled_ = true;
+      return true;
+    } else {
+      return false;
+    }
+  } else {
+    receiving_tsn_enabled_ = false;
+    return rtp_header_parser_->DeregisterRtpHeaderExtension(
+        kRtpExtensionTransportSequenceNumber);
+  }
+}
+
 int ViEReceiver::ReceivedRTPPacket(const void* rtp_packet,
                                    size_t rtp_packet_length,
                                    const PacketTime& packet_time) {