media/base/android/media_player_bridge.h

   1 // Copyright (c) 2012 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_BASE_ANDROID_MEDIA_PLAYER_BRIDGE_H_
   6 #define MEDIA_BASE_ANDROID_MEDIA_PLAYER_BRIDGE_H_
   7
   8 #include <jni.h>
   9 #include <map>
  10 #include <string>
  11
  12 #include "base/android/scoped_java_ref.h"
  13 #include "base/callback.h"
  14 #include "base/memory/scoped_ptr.h"
  15 #include "base/memory/weak_ptr.h"
  16 #include "base/strings/string16.h"
  17 #include "base/time/time.h"
  18 #include "base/timer/timer.h"
  19 #include "media/base/android/media_player_android.h"
  20 #include "url/gurl.h"
  21
  22 namespace media {
  23
  24 class MediaPlayerManager;
  25
  26 // This class serves as a bridge between the native code and Android MediaPlayer
  27 // Java class. For more information on Android MediaPlayer, check
  28 // http://developer.android.com/reference/android/media/MediaPlayer.html
  29 // The actual Android MediaPlayer instance is created lazily when Start(),
  30 // Pause(), SeekTo() gets called. As a result, media information may not
  31 // be available until one of those operations is performed. After that, we
  32 // will cache those information in case the mediaplayer gets released.
  33 // The class uses the corresponding MediaPlayerBridge Java class to talk to
  34 // the Android MediaPlayer instance.
  35 class MEDIA_EXPORT MediaPlayerBridge : public MediaPlayerAndroid {
  36  public:
  37   static bool RegisterMediaPlayerBridge(JNIEnv* env);
  38
  39   // Construct a MediaPlayerBridge object. This object needs to call |manager|'s
  40   // RequestMediaResources() before decoding the media stream. This allows
  41   // |manager| to track unused resources and free them when needed.
  42   // MediaPlayerBridge also forwards Android MediaPlayer callbacks to
  43   // the |manager| when needed.
  44   MediaPlayerBridge(int player_id,
  45                     const GURL& url,
  46                     const GURL& first_party_for_cookies,
  47                     const std::string& user_agent,
  48                     bool hide_url_log,
  49                     MediaPlayerManager* manager,
  50                     const RequestMediaResourcesCB& request_media_resources_cb,
  51                     const GURL& frame_url,
  52                     bool allow_credentials);
  53   ~MediaPlayerBridge() override;
  54
  55   // Initialize this object and extract the metadata from the media.
  56   virtual void Initialize();
  57
  58   // MediaPlayerAndroid implementation.
  59   void SetVideoSurface(gfx::ScopedJavaSurface surface) override;
  60   void Start() override;
  61   void Pause(bool is_media_related_action) override;
  62   void SeekTo(base::TimeDelta timestamp) override;
  63   void Release() override;
  64   void SetVolume(double volume) override;
  65   int GetVideoWidth() override;
  66   int GetVideoHeight() override;
  67   base::TimeDelta GetCurrentTime() override;
  68   base::TimeDelta GetDuration() override;
  69   bool IsPlaying() override;
  70   bool CanPause() override;
  71   bool CanSeekForward() override;
  72   bool CanSeekBackward() override;
  73   bool IsPlayerReady() override;
  74   GURL GetUrl() override;
  75   GURL GetFirstPartyForCookies() override;
  76
  77   void OnDidSetDataUriDataSource(JNIEnv* env, jobject obj, jboolean success);
  78
  79  protected:
  80   void SetDuration(base::TimeDelta time);
  81
  82   virtual void PendingSeekInternal(const base::TimeDelta& time);
  83
  84   // Prepare the player for playback, asynchronously. When succeeds,
  85   // OnMediaPrepared() will be called. Otherwise, OnMediaError() will
  86   // be called with an error type.
  87   virtual void Prepare();
  88
  89   // MediaPlayerAndroid implementation.
  90   void OnVideoSizeChanged(int width, int height) override;
  91   void OnPlaybackComplete() override;
  92   void OnMediaInterrupted() override;
  93   void OnMediaPrepared() override;
  94
  95   // Create the corresponding Java class instance.
  96   virtual void CreateJavaMediaPlayerBridge();
  97
  98   // Get allowed operations from the player.
  99   virtual base::android::ScopedJavaLocalRef<jobject> GetAllowedOperations();
 100
 101  private:
 102   // Set the data source for the media player.
 103   void SetDataSource(const std::string& url);
 104
 105   // Functions that implements media player control.
 106   void StartInternal();
 107   void PauseInternal();
 108   void SeekInternal(base::TimeDelta time);
 109
 110   // Called when |time_update_timer_| fires.
 111   void OnTimeUpdateTimerFired();
 112
 113   // Update allowed operations from the player.
 114   void UpdateAllowedOperations();
 115
 116   // Callback function passed to |resource_getter_|. Called when the cookies
 117   // are retrieved.
 118   void OnCookiesRetrieved(const std::string& cookies);
 119
 120   // Callback function passed to |resource_getter_|. Called when the auth
 121   // credentials are retrieved.
 122   void OnAuthCredentialsRetrieved(
 123       const base::string16& username, const base::string16& password);
 124
 125   // Extract the media metadata from a url, asynchronously.
 126   // OnMediaMetadataExtracted() will be called when this call finishes.
 127   void ExtractMediaMetadata(const std::string& url);
 128   void OnMediaMetadataExtracted(base::TimeDelta duration, int width, int height,
 129                                 bool success);
 130
 131   // Returns true if a MediaUrlInterceptor registered by the embedder has
 132   // intercepted the url.
 133   bool InterceptMediaUrl(
 134       const std::string& url, int* fd, int64* offset, int64* size);
 135
 136   // Whether the player is prepared for playback.
 137   bool prepared_;
 138
 139   // Pending play event while player is preparing.
 140   bool pending_play_;
 141
 142   // Pending seek time while player is preparing.
 143   base::TimeDelta pending_seek_;
 144
 145   // Whether a seek should be performed after preparing.
 146   bool should_seek_on_prepare_;
 147
 148   // Url for playback.
 149   GURL url_;
 150
 151   // First party url for cookies.
 152   GURL first_party_for_cookies_;
 153
 154   // User agent string to be used for media player.
 155   const std::string user_agent_;
 156
 157   // Hide url log from media player.
 158   bool hide_url_log_;
 159
 160   // Stats about the media.
 161   base::TimeDelta duration_;
 162   int width_;
 163   int height_;
 164
 165   // Meta data about actions can be taken.
 166   bool can_pause_;
 167   bool can_seek_forward_;
 168   bool can_seek_backward_;
 169
 170   // Cookies for |url_|.
 171   std::string cookies_;
 172
 173   // Java MediaPlayerBridge instance.
 174   base::android::ScopedJavaGlobalRef<jobject> j_media_player_bridge_;
 175
 176   base::RepeatingTimer<MediaPlayerBridge> time_update_timer_;
 177
 178   // Volume of playback.
 179   double volume_;
 180
 181   // Whether user credentials are allowed to be passed.
 182   bool allow_credentials_;
 183
 184   // NOTE: Weak pointers must be invalidated before all other member variables.
 185   base::WeakPtrFactory<MediaPlayerBridge> weak_factory_;
 186
 187   DISALLOW_COPY_AND_ASSIGN(MediaPlayerBridge);
 188 };
 189
 190 }  // namespace media
 191
 192 #endif  // MEDIA_BASE_ANDROID_MEDIA_PLAYER_BRIDGE_H_