Revert of Cast: Re-factor rtcp_sender.cc into rtcp_builder.cc and do some cleanup

media/cast/net/rtcp/rtcp_sender.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_NET_RTCP_RTCP_SENDER_H_
+#define MEDIA_CAST_NET_RTCP_RTCP_SENDER_H_
+
+#include <deque>
+#include <list>
+#include <string>
+
+#include "media/cast/cast_config.h"
+#include "media/cast/cast_defines.h"
+#include "media/cast/net/cast_transport_defines.h"
+#include "media/cast/net/rtcp/receiver_rtcp_event_subscriber.h"
+#include "media/cast/net/rtcp/rtcp_defines.h"
+
+namespace media {
+namespace cast {
+
+// We limit the size of receiver logs to avoid queuing up packets.
+const size_t kMaxReceiverLogBytes = 200;
+
+// The determines how long to hold receiver log events, based on how
+// many "receiver log message reports" ago the events were sent.
+const size_t kReceiveLogMessageHistorySize = 20;
+
+// This determines when to send events the second time.
+const size_t kFirstRedundancyOffset = 10;
+COMPILE_ASSERT(kFirstRedundancyOffset > 0 &&
+                   kFirstRedundancyOffset <= kReceiveLogMessageHistorySize,
+               redundancy_offset_out_of_range);
+
+// When to send events the third time.
+const size_t kSecondRedundancyOffset = 20;
+COMPILE_ASSERT(kSecondRedundancyOffset >
+                   kFirstRedundancyOffset && kSecondRedundancyOffset <=
+                   kReceiveLogMessageHistorySize,
+               redundancy_offset_out_of_range);
+
+class PacedPacketSender;
+
+// TODO(hclam): This should be renamed to RtcpPacketBuilder. The function
+// of this class is to only to build a RTCP packet but not to send it.
+class RtcpSender {
+ public:
+  RtcpSender(PacedPacketSender* outgoing_transport,
+             uint32 sending_ssrc);
+  ~RtcpSender();
+
+  // TODO(hclam): This method should be to build a packet instead of
+  // sending it.
+  void SendRtcpFromRtpReceiver(
+      const RtcpReportBlock* report_block,
+      const RtcpReceiverReferenceTimeReport* rrtr,
+      const RtcpCastMessage* cast_message,
+      const ReceiverRtcpEventSubscriber::RtcpEventMultiMap* rtcp_events,
+      base::TimeDelta target_delay);
+
+  // TODO(hclam): This method should be to build a packet instead of
+  // sending it.
+  void SendRtcpFromRtpSender(const RtcpSenderInfo& sender_info);
+
+ private:
+  void BuildRR(const RtcpReportBlock* report_block,
+               Packet* packet) const;
+
+  void AddReportBlocks(const RtcpReportBlock& report_block,
+                       Packet* packet) const;
+
+  void BuildRrtr(const RtcpReceiverReferenceTimeReport* rrtr,
+                 Packet* packet) const;
+
+  void BuildCast(const RtcpCastMessage* cast_message,
+                 base::TimeDelta target_delay,
+                 Packet* packet) const;
+
+  void BuildSR(const RtcpSenderInfo& sender_info, Packet* packet) const;
+
+  void BuildDlrrRb(const RtcpDlrrReportBlock& dlrr, Packet* packet) const;
+
+  void BuildReceiverLog(
+      const ReceiverRtcpEventSubscriber::RtcpEventMultiMap& rtcp_events,
+      Packet* packet);
+
+  bool BuildRtcpReceiverLogMessage(
+      const ReceiverRtcpEventSubscriber::RtcpEventMultiMap& rtcp_events,
+      size_t start_size,
+      RtcpReceiverLogMessage* receiver_log_message,
+      size_t* number_of_frames,
+      size_t* total_number_of_messages_to_send,
+      size_t* rtcp_log_size);
+
+  const uint32 ssrc_;
+
+ // Not owned by this class.
+  PacedPacketSender* const transport_;
+
+  std::deque<RtcpReceiverLogMessage> rtcp_events_history_;
+
+  DISALLOW_COPY_AND_ASSIGN(RtcpSender);
+};
+
+}  // namespace cast
+}  // namespace media
+
+#endif  // MEDIA_CAST_NET_RTCP_RTCP_SENDER_H_