Enables PacketGenerator's use of PacketCreator's FEC primitives.

net/quic/quic_packet_creator.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // Accumulates frames for the next packet until more frames no longer fit or
 // it's time to create a packet from them.  Also provides packet creation of
 // FEC packets based on previously created packets.
 
 #ifndef NET_QUIC_QUIC_PACKET_CREATOR_H_
 #define NET_QUIC_QUIC_PACKET_CREATOR_H_
@@ skipping 38 matching lines @@
   // Turn off FEC protection for subsequently created packets. If the creator
   // has any open FEC group, call will fail. It is the caller's responsibility
   // to flush out FEC packets in generation, and to verify with ShouldSendFec()
   // that there is no open FEC group.
   void StopFecProtectingPackets();
 
   // Checks if it's time to send an FEC packet.  |force_close| forces this to
   // return true if an FEC group is open.
   bool ShouldSendFec(bool force_close) const;
 
+  // Returns true if an FEC packet is under construction.
+  bool IsFecGroupOpen() const;
+
   // Makes the framer not serialize the protocol version in sent packets.
   void StopSendingVersion();
 
   // Update the sequence number length to use in future packets as soon as it
   // can be safely changed.
   void UpdateSequenceNumberLength(
       QuicPacketSequenceNumber least_packet_awaited_by_peer,
       QuicByteCount congestion_window);
 
   // The overhead the framing will add for a packet with one frame.
@@ skipping 35 matching lines @@
   SerializedPacket SerializeAllFrames(const QuicFrames& frames);
 
   // Re-serializes frames with the original packet's sequence number length.
   // Used for retransmitting packets to ensure they aren't too long.
   // Caller must ensure that any open FEC group is closed before calling this
   // method.
   SerializedPacket ReserializeAllFrames(
       const QuicFrames& frames, QuicSequenceNumberLength original_length);
 
   // Returns true if there are frames pending to be serialized.
-  bool HasPendingFrames();
+  bool HasPendingFrames() const;
 
   // Returns whether FEC protection is currently enabled. Note: Enabled does not
   // mean that an FEC group is currently active; i.e., IsFecProtected() may
   // still return false.
   bool IsFecEnabled() const;
 
   // Returns true if subsequent packets will be FEC protected. Note: True does
   // not mean that an FEC packet is currently under construction; i.e.,
   // fec_group_.get() may still be NULL, until MaybeStartFec() is called.
   bool IsFecProtected() const;
@@ skipping 161 matching lines @@
   mutable size_t packet_size_;
   QuicFrames queued_frames_;
   scoped_ptr<RetransmittableFrames> queued_retransmittable_frames_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicPacketCreator);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_PACKET_CREATOR_H_