Inform jitter buffer about FlexFEC protection.

webrtc/call/call.h

 /*
  *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 #ifndef WEBRTC_CALL_CALL_H_
@@ skipping 101 matching lines @@
   virtual VideoSendStream* CreateVideoSendStream(
       VideoSendStream::Config config,
       VideoEncoderConfig encoder_config) = 0;
   virtual void DestroyVideoSendStream(VideoSendStream* send_stream) = 0;
 
   virtual VideoReceiveStream* CreateVideoReceiveStream(
       VideoReceiveStream::Config configuration) = 0;
   virtual void DestroyVideoReceiveStream(
       VideoReceiveStream* receive_stream) = 0;
 
+  // In order for a created VideoReceiveStream to be aware that it is
+  // protected by a FlexfecReceiveStream, the latter should be created before
+  // the former.
   virtual FlexfecReceiveStream* CreateFlexfecReceiveStream(
       const FlexfecReceiveStream::Config& config) = 0;
   virtual void DestroyFlexfecReceiveStream(
       FlexfecReceiveStream* receive_stream) = 0;
 
   // All received RTP and RTCP packets for the call should be inserted to this
   // PacketReceiver. The PacketReceiver pointer is valid as long as the
   // Call instance exists.
   virtual PacketReceiver* Receiver() = 0;
 
@@ skipping 24 matching lines @@
       const rtc::NetworkRoute& network_route) = 0;
 
   virtual void OnSentPacket(const rtc::SentPacket& sent_packet) = 0;
 
   virtual ~Call() {}
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_CALL_CALL_H_