1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef MEDIA_CDM_PLAYER_TRACKER_IMPL_H_
6#define MEDIA_CDM_PLAYER_TRACKER_IMPL_H_
7
8#include <map>
9
10#include "base/basictypes.h"
11#include "base/callback.h"
12#include "base/threading/thread_checker.h"
13#include "media/base/media_export.h"
14#include "media/base/player_tracker.h"
15
16namespace media {
17
18// A common implementation that can be shared by different PlayerTracker
19// implementations. This class is not thread safe and should only be called
20// on one thread.
21class MEDIA_EXPORT PlayerTrackerImpl : public PlayerTracker {
22 public:
23  PlayerTrackerImpl();
24  virtual ~PlayerTrackerImpl();
25
26  // PlayerTracker implementation.
27  virtual int RegisterPlayer(const base::Closure& new_key_cb,
28                             const base::Closure& cdm_unset_cb) OVERRIDE;
29  virtual void UnregisterPlayer(int registration_id) OVERRIDE;
30
31  // Helpers methods to fire registered callbacks.
32  void NotifyNewKey();
33  void NotifyCdmUnset();
34
35 private:
36  struct PlayerCallbacks {
37    PlayerCallbacks(base::Closure new_key_cb, base::Closure cdm_unset_cb);
38    ~PlayerCallbacks();
39
40    base::Closure new_key_cb;
41    base::Closure cdm_unset_cb;
42  };
43
44  int next_registration_id_;
45  std::map<int, PlayerCallbacks> player_callbacks_map_;
46
47  base::ThreadChecker thread_checker_;
48
49  DISALLOW_COPY_AND_ASSIGN(PlayerTrackerImpl);
50};
51
52}  // namespace media
53
54#endif  // MEDIA_CDM_PLAYER_TRACKER_IMPL_H_
55