Adding the logic for releasing decoder resources in WebMediaPlayerManagerAndroid

webkit/media/android/webmediaplayer_android.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 WEBKIT_MEDIA_ANDROID_WEBMEDIAPLAYER_ANDROID_H_
 #define WEBKIT_MEDIA_ANDROID_WEBMEDIAPLAYER_ANDROID_H_
 #pragma once
 
 #include <jni.h>
 
 #include "base/basictypes.h"
-#include "base/message_loop_proxy.h"
+#include "base/message_loop.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebMediaPlayer.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebSize.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebURL.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebVideoFrame.h"
 
 namespace WebKit {
 class WebCookieJar;
 class WebFrame;
 }
 
 namespace media {
 class MediaPlayerBridge;
 }
 
 namespace webkit_media {
 
 class StreamTextureFactory;
 class StreamTextureProxy;
 class WebMediaPlayerManagerAndroid;
 class WebMediaPlayerProxyAndroid;
 
 // This class serves as the android implementation of WebKit::WebMediaPlayer.
 // It implements all the playback functions by forwarding calls to android
 // media player, and reports player state changes to the webkit.
 class WebMediaPlayerAndroid :
     public WebKit::WebMediaPlayer,
+    public MessageLoop::DestructionObserver,
     public base::SupportsWeakPtr<WebMediaPlayerAndroid> {
  public:
   WebMediaPlayerAndroid(WebKit::WebFrame* frame,
                         WebKit::WebMediaPlayerClient* client,
                         WebKit::WebCookieJar* cookie_jar,
                         webkit_media::WebMediaPlayerManagerAndroid* manager,
                         webkit_media::StreamTextureFactory* factory);
   virtual ~WebMediaPlayerAndroid();
 
   // Set |incognito_mode_| to true if in incognito mode.
@@ skipping 72 matching lines @@
   void OnSeekComplete();
   void OnMediaError(int error_type);
   void OnMediaInfo(int info_type);
   void OnVideoSizeChanged(int width, int height);
 
   // This function is called by WebMediaPlayerManagerAndroid to pause the video
   // and release |media_player_| and its surface texture when we switch tabs.
   // However, the actual GlTexture is not released to keep the video screenshot.
   void ReleaseMediaResources();
 
+  // Whether |media_player_| has been initialized.
+  bool IsInitialized() const;
+
+  // Method inherited from DestructionObserver.
+  virtual void WillDestroyCurrentMessageLoop() OVERRIDE;
+
  private:
   // Create a media player to load the |url_| and prepare for playback.
   // Because of limited decoding resources on mobile devices, idle media players
   // could get released. In that case, we call this function to get a new media
   // player when needed.
   void InitializeMediaPlayer();
 
   // Functions that implements media player control.
   void PlayInternal();
   void PauseInternal();
@@ skipping 22 matching lines @@
 
   // Size of the media element.
   WebKit::WebSize texture_size_;
 
   // Size of the video.
   WebKit::WebSize natural_size_;
 
   // The video frame object used for renderering by WebKit.
   scoped_ptr<WebKit::WebVideoFrame> video_frame_;
 
+  // Message loops for main renderer thread.
+  MessageLoop* main_loop_;
+
   // Proxy object that delegates method calls on Render Thread.
   // This object is created on the Render Thread and is only called in the
   // destructor.
   scoped_refptr<WebMediaPlayerProxyAndroid> proxy_;
 
   // If this is set to true, prepare of the media player is done.
   bool prepared_;
 
   // URL of the media file to be fetched.
   GURL url_;
@@ skipping 50 matching lines @@
   // Object for calling back the compositor thread to repaint the video when a
   // frame available. It should be initialized on the compositor thread.
   scoped_ptr<webkit_media::StreamTextureProxy> stream_texture_proxy_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerAndroid);
 };
 
 }  // namespace webkit_media
 
 #endif  // WEBKIT_MEDIA_ANDROID_WEBMEDIAPLAYER_ANDROID_H_