Listen to the audio focus event for MSE/EME

media/base/android/media_player_bridge.h

 // Copyright (c) 2012 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_BASE_ANDROID_MEDIA_PLAYER_BRIDGE_H_
 #define MEDIA_BASE_ANDROID_MEDIA_PLAYER_BRIDGE_H_
 
 #include <jni.h>
 #include <map>
 #include <string>
 
 #include "base/android/scoped_java_ref.h"
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/strings/string16.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 #include "media/base/android/media_player_android.h"
-#include "media/base/android/media_player_listener.h"
 #include "url/gurl.h"
 
 namespace media {
 
 class MediaPlayerManager;
 
 // This class serves as a bridge between the native code and Android MediaPlayer
 // Java class. For more information on Android MediaPlayer, check
 // http://developer.android.com/reference/android/media/MediaPlayer.html
 // The actual Android MediaPlayer instance is created lazily when Start(),
@@ skipping 38 matching lines @@
   virtual base::TimeDelta GetDuration() override;
   virtual bool IsPlaying() override;
   virtual bool CanPause() override;
   virtual bool CanSeekForward() override;
   virtual bool CanSeekBackward() override;
   virtual bool IsPlayerReady() override;
   virtual GURL GetUrl() override;
   virtual GURL GetFirstPartyForCookies() override;
   virtual bool IsSurfaceInUse() const override;
 
-  // MediaPlayerListener callbacks.
-  void OnVideoSizeChanged(int width, int height);
-  void OnMediaError(int error_type);
-  void OnBufferingUpdate(int percent);
-  void OnPlaybackComplete();
-  void OnMediaInterrupted();
-  void OnSeekComplete();
   void OnDidSetDataUriDataSource(JNIEnv* env, jobject obj, jboolean success);
 
  protected:
   void SetJavaMediaPlayerBridge(jobject j_media_player_bridge);
   base::android::ScopedJavaLocalRef<jobject> GetJavaMediaPlayerBridge();
-  void SetMediaPlayerListener();
   void SetDuration(base::TimeDelta time);
 
   virtual void PendingSeekInternal(const base::TimeDelta& time);
 
   // Prepare the player for playback, asynchronously. When succeeds,
   // OnMediaPrepared() will be called. Otherwise, OnMediaError() will
   // be called with an error type.
   virtual void Prepare();
-  void OnMediaPrepared();
+
+  // MediaPlayerAndroid implementation.
+  virtual void OnVideoSizeChanged(int width, int height) override;
+  virtual void OnPlaybackComplete() override;
+  virtual void OnMediaInterrupted() override;
+  virtual void OnMediaPrepared() override;
 
   // Create the corresponding Java class instance.
   virtual void CreateJavaMediaPlayerBridge();
 
   // Get allowed operations from the player.
   virtual base::android::ScopedJavaLocalRef<jobject> GetAllowedOperations();
 
  private:
-  friend class MediaPlayerListener;
-
   // Set the data source for the media player.
   void SetDataSource(const std::string& url);
 
   // Functions that implements media player control.
   void StartInternal();
   void PauseInternal();
   void SeekInternal(base::TimeDelta time);
 
   // Called when |time_update_timer_| fires.
   void OnTimeUpdateTimerFired();
@@ skipping 53 matching lines @@
   bool can_seek_backward_;
 
   // Cookies for |url_|.
   std::string cookies_;
 
   // Java MediaPlayerBridge instance.
   base::android::ScopedJavaGlobalRef<jobject> j_media_player_bridge_;
 
   base::RepeatingTimer<MediaPlayerBridge> time_update_timer_;
 
-  // Listener object that listens to all the media player events.
-  scoped_ptr<MediaPlayerListener> listener_;
-
   // Whether player is currently using a surface.
   bool is_surface_in_use_;
 
   // Volume of playback.
   double volume_;
 
   // Whether user credentials are allowed to be passed.
   bool allow_credentials_;
 
-  // Weak pointer passed to |listener_| for callbacks.
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<MediaPlayerBridge> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaPlayerBridge);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_ANDROID_MEDIA_PLAYER_BRIDGE_H_