Implement FrameMarking header extension support

webrtc/modules/rtp_rtcp/source/rtp_utility.cc

Index: webrtc/modules/rtp_rtcp/source/rtp_utility.cc
diff --git a/webrtc/modules/rtp_rtcp/source/rtp_utility.cc b/webrtc/modules/rtp_rtcp/source/rtp_utility.cc
index 4b5ecfa6983d61cba3ebaf9adc74496858c7f4bf..d09ec7a4fd729451acdddf85f87750541d33f85d 100644
--- a/webrtc/modules/rtp_rtcp/source/rtp_utility.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtp_utility.cc
@@ -249,6 +249,9 @@ bool RtpHeaderParser::Parse(RTPHeader* header,
   header->extension.has_video_timing = false;
   header->extension.video_timing = {0u, 0u, 0u, 0u, 0u, 0u, false};
 
+  // May not be present in packet.
+  header->extension.has_frame_marks = false;
+
   if (X) {
     /* RTP header extension, RFC 3550.
      0                   1                   2                   3
@@ -483,6 +486,15 @@ void RtpHeaderParser::ParseOneByteExtensionHeader(
           header->extension.mid.Set(rtc::MakeArrayView(ptr, len + 1));
           break;
         }
+        case kRtpExtensionFrameMarking: {
+          if (!FrameMarking::Parse(rtc::MakeArrayView(ptr, len + 1),
+                                   &header->extension.frame_marks)) {
+            LOG(LS_WARNING) << "Incorrect frame marking extension";
+            return;
+          }
+          header->extension.has_frame_marks = true;
+          break;
+        }
         case kRtpExtensionNone:
         case kRtpExtensionNumberOfExtensions: {
           RTC_NOTREACHED() << "Invalid extension type: " << type;