WebRtcOpus_PacketHasFec was written long time ago. see http://webrtc-codereview.appspot.com/7539004. When revisiting, I notice that adding more comments should help. Code style should be improved a bit too. Bug: webrtc:10772 Change-Id: If4d60b210e6235b4f787608047e88efc949f6838 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/144056 Commit-Queue: Minyue Li <minyue@webrtc.org> Reviewed-by: Henrik Lundin <henrik.lundin@webrtc.org> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Cr-Commit-Position: refs/heads/master@{#28479}