content/renderer/media/render_media_client.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 CONTENT_RENDERER_MEDIA_RENDER_MEDIA_CLIENT_H_
   6 #define CONTENT_RENDERER_MEDIA_RENDER_MEDIA_CLIENT_H_
   7
   8 #include "base/lazy_instance.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/threading/thread_checker.h"
  11 #include "base/time/tick_clock.h"
  12 #include "base/time/time.h"
  13 #include "content/common/content_export.h"
  14 #include "media/base/media_client.h"
  15
  16 #include "widevine_cdm_version.h" // In SHARED_INTERMEDIATE_DIR.
  17
  18 namespace content {
  19
  20 class CONTENT_EXPORT RenderMediaClient : public media::MediaClient {
  21  public:
  22   // Initialize RenderMediaClient and SetMediaClient(). Note that the instance
  23   // is not exposed because no content code needs to directly access it.
  24   static void Initialize();
  25
  26   // MediaClient implementation.
  27   void AddKeySystemsInfoForUMA(
  28       std::vector<media::KeySystemInfoForUMA>* key_systems_info_for_uma) final;
  29   bool IsKeySystemsUpdateNeeded() final;
  30   void AddSupportedKeySystems(
  31       std::vector<media::KeySystemInfo>* key_systems_info) final;
  32   void RecordRapporURL(const std::string& metric, const GURL& url) final;
  33
  34   void SetTickClockForTesting(scoped_ptr<base::TickClock> tick_clock);
  35
  36  private:
  37   friend struct base::DefaultLazyInstanceTraits<RenderMediaClient>;
  38
  39   RenderMediaClient();
  40   ~RenderMediaClient() override;
  41
  42   // Makes sure all methods are called from the same thread.
  43   base::ThreadChecker thread_checker_;
  44
  45   // Whether AddSupportedKeySystems() has ever been called.
  46   bool has_updated_;
  47
  48   // Whether a future update is needed. For example, when some potentially
  49   // supported key systems are NOT supported yet. This could happen when the
  50   // required component for a key system is not yet available.
  51   bool is_update_needed_;
  52
  53   base::TimeTicks last_update_time_ticks_;
  54   scoped_ptr<base::TickClock> tick_clock_;
  55
  56   DISALLOW_COPY_AND_ASSIGN(RenderMediaClient);
  57 };
  58
  59 #if defined(UNIT_TEST)
  60 // Helper function to access the RenderMediaClient instance. Used only by unit
  61 // tests.
  62 CONTENT_EXPORT RenderMediaClient* GetRenderMediaClientInstanceForTesting();
  63 #endif
  64
  65 }  // namespace content
  66
  67 #endif  // CONTENT_RENDERER_MEDIA_RENDER_MEDIA_CLIENT_H_