media/cdm/player_tracker_impl.h

   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
  16 namespace 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.
  21 class MEDIA_EXPORT PlayerTrackerImpl : public PlayerTracker {
  22  public:
  23   PlayerTrackerImpl();
  24   ~PlayerTrackerImpl() override;
  25
  26   // PlayerTracker implementation.
  27   int RegisterPlayer(const base::Closure& new_key_cb,
  28                      const base::Closure& cdm_unset_cb) override;
  29   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_