content/renderer/media/webmediaplayer_ms.h

   1 // Copyright 2013 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_WEBMEDIAPLAYER_MS_H_
   6 #define CONTENT_RENDERER_MEDIA_WEBMEDIAPLAYER_MS_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/memory/weak_ptr.h"
  11 #include "base/synchronization/lock.h"
  12 #include "base/threading/thread_checker.h"
  13 #include "cc/layers/video_frame_provider.h"
  14 #include "media/filters/skcanvas_video_renderer.h"
  15 #include "skia/ext/platform_canvas.h"
  16 #include "third_party/WebKit/public/platform/WebMediaPlayer.h"
  17 #include "url/gurl.h"
  18
  19 namespace blink {
  20 class WebFrame;
  21 class WebGraphicsContext3D;
  22 class WebMediaPlayerClient;
  23 }
  24
  25 namespace media {
  26 class MediaLog;
  27 class WebMediaPlayerDelegate;
  28 }
  29
  30 namespace cc_blink {
  31 class WebLayerImpl;
  32 }
  33
  34 namespace content {
  35 class MediaStreamAudioRenderer;
  36 class MediaStreamRendererFactory;
  37 class VideoFrameProvider;
  38
  39 // WebMediaPlayerMS delegates calls from WebCore::MediaPlayerPrivate to
  40 // Chrome's media player when "src" is from media stream.
  41 //
  42 // WebMediaPlayerMS works with multiple objects, the most important ones are:
  43 //
  44 // VideoFrameProvider
  45 //   provides video frames for rendering.
  46 //
  47 // TODO(wjia): add AudioPlayer.
  48 // AudioPlayer
  49 //   plays audio streams.
  50 //
  51 // blink::WebMediaPlayerClient
  52 //   WebKit client of this media player object.
  53 class WebMediaPlayerMS
  54     : public blink::WebMediaPlayer,
  55       public cc::VideoFrameProvider,
  56       public base::SupportsWeakPtr<WebMediaPlayerMS> {
  57  public:
  58   // Construct a WebMediaPlayerMS with reference to the client, and
  59   // a MediaStreamClient which provides VideoFrameProvider.
  60   WebMediaPlayerMS(blink::WebFrame* frame,
  61                    blink::WebMediaPlayerClient* client,
  62                    base::WeakPtr<media::WebMediaPlayerDelegate> delegate,
  63                    media::MediaLog* media_log,
  64                    scoped_ptr<MediaStreamRendererFactory> factory);
  65   virtual ~WebMediaPlayerMS();
  66
  67   virtual void load(LoadType load_type,
  68                     const blink::WebURL& url,
  69                     CORSMode cors_mode);
  70
  71   // Playback controls.
  72   virtual void play();
  73   virtual void pause();
  74   virtual bool supportsSave() const;
  75   virtual void seek(double seconds);
  76   virtual void setRate(double rate);
  77   virtual void setVolume(double volume);
  78   virtual void setPreload(blink::WebMediaPlayer::Preload preload);
  79   virtual blink::WebTimeRanges buffered() const;
  80   virtual blink::WebTimeRanges seekable() const;
  81
  82   // Methods for painting.
  83   virtual void paint(blink::WebCanvas* canvas,
  84                      const blink::WebRect& rect,
  85                      unsigned char alpha,
  86                      SkXfermode::Mode mode);
  87
  88   // True if the loaded media has a playable video/audio track.
  89   virtual bool hasVideo() const;
  90   virtual bool hasAudio() const;
  91
  92   // Dimensions of the video.
  93   virtual blink::WebSize naturalSize() const;
  94
  95   // Getters of playback state.
  96   virtual bool paused() const;
  97   virtual bool seeking() const;
  98   virtual double duration() const;
  99   virtual double currentTime() const;
 100
 101   // Internal states of loading and network.
 102   virtual blink::WebMediaPlayer::NetworkState networkState() const;
 103   virtual blink::WebMediaPlayer::ReadyState readyState() const;
 104
 105   virtual bool didLoadingProgress();
 106
 107   virtual bool hasSingleSecurityOrigin() const;
 108   virtual bool didPassCORSAccessCheck() const;
 109
 110   virtual double mediaTimeForTimeValue(double timeValue) const;
 111
 112   virtual unsigned decodedFrameCount() const;
 113   virtual unsigned droppedFrameCount() const;
 114   virtual unsigned audioDecodedByteCount() const;
 115   virtual unsigned videoDecodedByteCount() const;
 116
 117   bool copyVideoTextureToPlatformTexture(
 118       blink::WebGraphicsContext3D* web_graphics_context,
 119       unsigned int texture,
 120       unsigned int level,
 121       unsigned int internal_format,
 122       unsigned int type,
 123       bool premultiply_alpha,
 124       bool flip_y) override;
 125
 126   // VideoFrameProvider implementation.
 127   void SetVideoFrameProviderClient(
 128       cc::VideoFrameProvider::Client* client) override;
 129   scoped_refptr<media::VideoFrame> GetCurrentFrame() override;
 130   void PutCurrentFrame(const scoped_refptr<media::VideoFrame>& frame) override;
 131
 132  private:
 133   // The callback for VideoFrameProvider to signal a new frame is available.
 134   void OnFrameAvailable(const scoped_refptr<media::VideoFrame>& frame);
 135   // Need repaint due to state change.
 136   void RepaintInternal();
 137
 138   // The callback for source to report error.
 139   void OnSourceError();
 140
 141   // Helpers that set the network/ready state and notifies the client if
 142   // they've changed.
 143   void SetNetworkState(blink::WebMediaPlayer::NetworkState state);
 144   void SetReadyState(blink::WebMediaPlayer::ReadyState state);
 145
 146   // Getter method to |client_|.
 147   blink::WebMediaPlayerClient* GetClient();
 148
 149   blink::WebFrame* frame_;
 150
 151   blink::WebMediaPlayer::NetworkState network_state_;
 152   blink::WebMediaPlayer::ReadyState ready_state_;
 153
 154   blink::WebTimeRanges buffered_;
 155
 156   float volume_;
 157
 158   // Used for DCHECKs to ensure methods calls executed in the correct thread.
 159   base::ThreadChecker thread_checker_;
 160
 161   blink::WebMediaPlayerClient* client_;
 162
 163   base::WeakPtr<media::WebMediaPlayerDelegate> delegate_;
 164
 165   // Specify content:: to disambiguate from cc::.
 166   scoped_refptr<content::VideoFrameProvider> video_frame_provider_;
 167   bool paused_;
 168
 169   // |current_frame_| is updated only on main thread. The object it holds
 170   // can be freed on the compositor thread if it is the last to hold a
 171   // reference but media::VideoFrame is a thread-safe ref-pointer. It is
 172   // however read on the compositing thread so locking is required around all
 173   // modifications on the main thread, and all reads on the compositing thread.
 174   scoped_refptr<media::VideoFrame> current_frame_;
 175   // |current_frame_used_| is updated on both main and compositing thread.
 176   // It's used to track whether |current_frame_| was painted for detecting
 177   // when to increase |dropped_frame_count_|.
 178   bool current_frame_used_;
 179   // |current_frame_lock_| protects |current_frame_used_| and |current_frame_|.
 180   base::Lock current_frame_lock_;
 181   bool pending_repaint_;
 182
 183   scoped_ptr<cc_blink::WebLayerImpl> video_weblayer_;
 184
 185   // A pointer back to the compositor to inform it about state changes. This is
 186   // not NULL while the compositor is actively using this webmediaplayer.
 187   cc::VideoFrameProvider::Client* video_frame_provider_client_;
 188
 189   bool received_first_frame_;
 190   base::TimeDelta current_time_;
 191   unsigned total_frame_count_;
 192   unsigned dropped_frame_count_;
 193   media::SkCanvasVideoRenderer video_renderer_;
 194
 195   scoped_refptr<MediaStreamAudioRenderer> audio_renderer_;
 196
 197   scoped_refptr<media::MediaLog> media_log_;
 198
 199   scoped_ptr<MediaStreamRendererFactory> renderer_factory_;
 200
 201   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerMS);
 202 };
 203
 204 }  // namespace content
 205
 206 #endif  // CONTENT_RENDERER_MEDIA_WEBMEDIAPLAYER_MS_H_