Cast: Refactor RTCP handling

media/cast/net/rtcp/rtcp_receiver.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.
 
 #ifndef MEDIA_CAST_RTCP_RTCP_RECEIVER_H_
 #define MEDIA_CAST_RTCP_RTCP_RECEIVER_H_
 
 #include <queue>
 
 #include "base/containers/hash_tables.h"
 #include "media/cast/net/cast_transport_defines.h"
 #include "media/cast/net/rtcp/rtcp.h"
 #include "media/cast/net/rtcp/rtcp_defines.h"
 #include "media/cast/net/rtcp/rtcp_utility.h"
 
 namespace media {
 namespace cast {
 
-class RtcpReceiverFeedback {
+// Interface for receiving RTCP messages.
+class RtcpMessageHandler {
  public:
   virtual void OnReceivedSenderReport(
       const RtcpSenderInfo& remote_sender_info) = 0;
 
   virtual void OnReceiverReferenceTimeReport(
       const RtcpReceiverReferenceTimeReport& remote_time_report) = 0;
 
-  virtual void OnReceivedSendReportRequest() = 0;
-
   virtual void OnReceivedReceiverLog(
       const RtcpReceiverLogMessage& receiver_log) = 0;
 
-  virtual ~RtcpReceiverFeedback() {}
-};
-
-class RtcpRttFeedback {
- public:
   virtual void OnReceivedDelaySinceLastReport(
-      uint32 receivers_ssrc,
       uint32 last_report,
       uint32 delay_since_last_report) = 0;
 
-  virtual ~RtcpRttFeedback() {}
+  virtual void OnReceivedCastFeedback(
+      const RtcpCastMessage& cast_message) = 0;
+
+  virtual ~RtcpMessageHandler() {}
 };
 
 class RtcpReceiver {
  public:
-  explicit RtcpReceiver(scoped_refptr<CastEnvironment> cast_environment,
-                        RtcpSenderFeedback* sender_feedback,
-                        RtcpReceiverFeedback* receiver_feedback,
-                        RtcpRttFeedback* rtt_feedback,
-                        uint32 local_ssrc);
+  RtcpReceiver(RtcpMessageHandler* handler, uint32 local_ssrc);
   virtual ~RtcpReceiver();
 
+  static bool IsRtcpPacket(const uint8* rtcp_buffer, size_t length);
+
+  static uint32 GetSsrcOfSender(const uint8* rtcp_buffer, size_t length);
+
   void SetRemoteSSRC(uint32 ssrc);
 
   // Set the history size to record Cast receiver events. Event history is
   // used to remove duplicates. The history has no more than |size| events.
   void SetCastReceiverEventHistorySize(size_t size);
 
   void IncomingRtcpPacket(RtcpParser* rtcp_parser);
 
  private:
   void HandleSenderReport(RtcpParser* rtcp_parser);
@@ skipping 40 matching lines @@
   void HandleApplicationSpecificCastSenderLog(RtcpParser* rtcp_parser);
   void HandleApplicationSpecificCastReceiverEventLog(
       uint32 frame_rtp_timestamp,
       RtcpParser* rtcp_parser,
       RtcpReceiverEventLogMessages* event_log_messages);
 
   const uint32 ssrc_;
   uint32 remote_ssrc_;
 
   // Not owned by this class.
-  RtcpSenderFeedback* const sender_feedback_;
-  RtcpReceiverFeedback* const receiver_feedback_;
-  RtcpRttFeedback* const rtt_feedback_;
-  scoped_refptr<CastEnvironment> cast_environment_;
+  RtcpMessageHandler* const handler_;
 
   FrameIdWrapHelper ack_frame_id_wrap_helper_;
 
   // Maintains a history of receiver events.
   size_t receiver_event_history_size_;
   typedef std::pair<uint64, uint64> ReceiverEventKey;
   base::hash_set<ReceiverEventKey> receiver_event_key_set_;
   std::queue<ReceiverEventKey> receiver_event_key_queue_;
 
   DISALLOW_COPY_AND_ASSIGN(RtcpReceiver);
 };
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_RTCP_RTCP_RECEIVER_H_