Cast: Remove SenderRtcpEventSubscriber from cast library.

media/cast/rtcp/sender_rtcp_event_subscriber.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_SENDER_RTCP_EVENT_SUBSCRIBER_H_
-#define MEDIA_CAST_RTCP_SENDER_RTCP_EVENT_SUBSCRIBER_H_
-
-#include <map>
-
-#include "base/threading/thread_checker.h"
-#include "media/cast/logging/logging_defines.h"
-#include "media/cast/logging/raw_event_subscriber.h"
-#include "media/cast/rtcp/rtcp_defines.h"
-
-namespace media {
-namespace cast {
-
-// The key should really be something more than just a RTP timestamp in order
-// to differentiate between video and audio frames, but since the implementation
-// only process video frame events, RTP timestamp only as key is fine.
-typedef std::map<RtpTimestamp, RtcpEvent> RtcpEventMap;
-
-// A RawEventSubscriber implementation with the following properties:
-// - Only processes raw event types that are relevant for sending from cast
-//   sender to cast receiver via RTCP.
-// - Captures information to be sent over to RTCP from raw event logs into the
-//   more compact RtcpEvent struct.
-// - Orders events by RTP timestamp with a map.
-// - Internally, the map is capped at a maximum size configurable by the caller.
-//   The subscriber only keeps the most recent events (determined by RTP
-//   timestamp) up to the size limit.
-class SenderRtcpEventSubscriber : public RawEventSubscriber {
- public:
-  // |max_size_to_retain|: The object will keep up to |max_size_to_retain|
-  // events
-  // in the map. Once threshold has been reached, an event with the smallest
-  // RTP timestamp will be removed.
-  SenderRtcpEventSubscriber(const size_t max_size_to_retain);
-
-  virtual ~SenderRtcpEventSubscriber();
-
-  // RawEventSubscriber implementation.
-  virtual void OnReceiveFrameEvent(const FrameEvent& frame_event) OVERRIDE;
-  virtual void OnReceivePacketEvent(const PacketEvent& packet_event) OVERRIDE;
-
-  // Assigns all collected events since last invocation to |rtcp_events|, and
-  // clears |rtcp_events_|.
-  void GetRtcpEventsAndReset(RtcpEventMap* rtcp_events);
-
- private:
-  // If |rtcp_events_.size()| exceeds |max_size_to_retain_|, remove an oldest
-  // entry
-  // (determined by RTP timestamp) so its size no greater than
-  // |max_size_to_retain_|.
-  void TruncateMapIfNeeded();
-
-  const size_t max_size_to_retain_;
-  RtcpEventMap rtcp_events_;
-
-  // Ensures methods are only called on the main thread.
-  base::ThreadChecker thread_checker_;
-
-  DISALLOW_COPY_AND_ASSIGN(SenderRtcpEventSubscriber);
-};
-
-}  // namespace cast
-}  // namespace media
-
-#endif  // MEDIA_CAST_RTCP_SENDER_RTCP_EVENT_SUBSCRIBER_H_