Cast: Reshuffle files under media/cast

media/cast/rtcp/receiver_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_RECEIVER_RTCP_EVENT_SUBSCRIBER_H_
-#define MEDIA_CAST_RTCP_RECEIVER_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 {
-
-// A RawEventSubscriber implementation with the following properties:
-// - Only processes raw event types that are relevant for sending from cast
-//   receiver to cast sender 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 multimap.
-// - 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 ReceiverRtcpEventSubscriber : public RawEventSubscriber {
- public:
-  typedef std::multimap<RtpTimestamp, RtcpEvent> RtcpEventMultiMap;
-
-  // |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.
-  // |type|: Determines whether the subscriber will process only audio or video
-  // events.
-  ReceiverRtcpEventSubscriber(const size_t max_size_to_retain,
-      EventMediaType type);
-
-  virtual ~ReceiverRtcpEventSubscriber();
-
-  // RawEventSubscriber implementation.
-  virtual void OnReceiveFrameEvent(const FrameEvent& frame_event) OVERRIDE;
-  virtual void OnReceivePacketEvent(const PacketEvent& packet_event) OVERRIDE;
-
-  // Assigns events collected to |rtcp_events| and clears them from this
-  // object.
-  void GetRtcpEventsAndReset(RtcpEventMultiMap* 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();
-
-  // Returns |true| if events of |event_type| and |media_type|
-  // should be processed.
-  bool ShouldProcessEvent(CastLoggingEvent event_type,
-      EventMediaType media_type);
-
-  const size_t max_size_to_retain_;
-  EventMediaType type_;
-
-  // 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 doesn't mix audio and video frame events, RTP timestamp
-  // only as key is fine.
-  RtcpEventMultiMap rtcp_events_;
-
-  // Ensures methods are only called on the main thread.
-  base::ThreadChecker thread_checker_;
-
-  DISALLOW_COPY_AND_ASSIGN(ReceiverRtcpEventSubscriber);
-};
-
-}  // namespace cast
-}  // namespace media
-
-#endif  // MEDIA_CAST_RTCP_RECEIVER_RTCP_EVENT_SUBSCRIBER_H_