Add Cast PLI support on sender side.

media/cast/net/cast_transport_sender_impl.h

 // Copyright 2014 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.
 
 // This class maintains a send transport for audio and video in a Cast
 // Streaming session.
 // Audio, video frames and RTCP messages are submitted to this object
 // and then packetized and paced to the underlying UDP socket.
 //
 // The hierarchy of send transport in a Cast Streaming session:
@@ skipping 49 matching lines @@
       base::TimeDelta logging_flush_interval,
       scoped_ptr<Client> client,
       scoped_ptr<PacketSender> transport,
       const scoped_refptr<base::SingleThreadTaskRunner>& transport_task_runner);
 
   ~CastTransportSenderImpl() final;
 
   // CastTransportSender implementation.
   void InitializeAudio(const CastTransportRtpConfig& config,
                        const RtcpCastMessageCallback& cast_message_cb,
-                       const RtcpRttCallback& rtt_cb) final;
+                       const RtcpRttCallback& rtt_cb,
+                       const RtcpPliCallback& pli_cb) final;
   void InitializeVideo(const CastTransportRtpConfig& config,
                        const RtcpCastMessageCallback& cast_message_cb,
-                       const RtcpRttCallback& rtt_cb) final;
+                       const RtcpRttCallback& rtt_cb,
+                       const RtcpPliCallback& pli_cb) final;
   void InsertFrame(uint32_t ssrc, const EncodedFrame& frame) final;
 
   void SendSenderReport(uint32_t ssrc,
                         base::TimeTicks current_time,
                         RtpTimeTicks current_time_as_rtp_timestamp) final;
 
   void CancelSendingFrames(uint32_t ssrc,
                            const std::vector<uint32_t>& frame_ids) final;
 
   void ResendFrameForKickstart(uint32_t ssrc, uint32_t frame_id) final;
@@ skipping 16 matching lines @@
 
   // CastTransportReceiver implementation.
   void AddValidRtpReceiver(uint32_t rtp_sender_ssrc,
                            uint32_t rtp_receiver_ssrc) final;
 
   // Building and sending RTCP packet from RTP receiver implementation.
   void InitializeRtpReceiverRtcpBuilder(uint32_t rtp_receiver_ssrc,
                                         const RtcpTimeData& time_data) final;
   void AddCastFeedback(const RtcpCastMessage& cast_message,
                        base::TimeDelta target_delay) final;
+  void AddPli(const RtcpPliMessage& pli_message) final;

[dcheng, 2016/03/16 01:39:24]

Maybe just mark the entire class final?

[xjz, 2016/03/16 17:12:13]

Marked the class final. Code style still requires marking overriding method with
"override" or "final", which ensures that the function is virtual.

   void AddRtcpEvents(
       const ReceiverRtcpEventSubscriber::RtcpEvents& rtcp_events) final;
   void AddRtpReceiverReport(
       const RtcpReportBlock& rtp_receiver_report_block) final;
   void SendRtcpFromRtpReceiver() final;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(CastTransportSenderImplTest, NacksCancelRetransmits);
   FRIEND_TEST_ALL_PREFIXES(CastTransportSenderImplTest, CancelRetransmits);
   FRIEND_TEST_ALL_PREFIXES(CastTransportSenderImplTest, Kickstart);
@@ skipping 77 matching lines @@
 
   base::WeakPtrFactory<CastTransportSenderImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CastTransportSenderImpl);
 };
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_NET_CAST_TRANSPORT_SENDER_IMPL_H_