Refactoring to introduce refcount to WebMediaPlayerImpl...

webkit/glue/media/video_renderer_impl.h

 // Copyright (c) 2009 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.
 //
 // The video renderer implementation to be use by the media pipeline. It lives
 // inside video renderer thread and also WebKit's main thread. We need to be
 // extra careful about members shared by two different threads, especially
 // video frame buffers.
 //
 // Methods called from WebKit's main thread:
 //   Paint()
 //   SetRect()
 
 #ifndef WEBKIT_GLUE_MEDIA_VIDEO_RENDERER_IMPL_H_
 #define WEBKIT_GLUE_MEDIA_VIDEO_RENDERER_IMPL_H_
 
 #include "base/gfx/platform_canvas.h"
 #include "base/gfx/rect.h"
 #include "base/gfx/size.h"
 #include "media/base/buffers.h"
 #include "media/base/factory.h"
 #include "media/base/filters.h"
 #include "media/filters/video_renderer_base.h"
 #include "webkit/api/public/WebMediaPlayer.h"
+#include "webkit/glue/webmediaplayer_impl.h"
 
 namespace webkit_glue {
 
-class WebMediaPlayerImpl;
-
 class VideoRendererImpl : public media::VideoRendererBase {
  public:
-  // Methods for painting called by the WebMediaPlayerDelegateImpl
+  // Methods for painting called by the WebMediaPlayerImpl::Proxy
 
   // This method is called with the same rect as the Paint method and could
   // be used by future implementations to implement an improved color space +
   // scale code on a separate thread.  Since we always do the stretch on the
   // same thread as the Paint method, we just ignore the call for now.
   virtual void SetRect(const gfx::Rect& rect);
 
   // Paint the current front frame on the |canvas| stretching it to fit the
   // |dest_rect|
   virtual void Paint(skia::PlatformCanvas* canvas, const gfx::Rect& dest_rect);
 
   // Static method for creating factory for this object.
-  static media::FilterFactory* CreateFactory(WebMediaPlayerImpl* delegate) {
+  static media::FilterFactory* CreateFactory(WebMediaPlayerImpl::Proxy* proxy) {
     return new media::FilterFactoryImpl1<VideoRendererImpl,
-                                         WebMediaPlayerImpl*>(delegate);
+                                         WebMediaPlayerImpl::Proxy*>(proxy);
   }
 
   // FilterFactoryImpl1 implementation.
   static bool IsMediaFormatSupported(const media::MediaFormat& media_format);
 
  protected:
   // Method called by VideoRendererBase during initialization.
   virtual bool OnInitialize(media::VideoDecoder* decoder);
 
   // Method called by the VideoRendererBase when stopping.
   virtual void OnStop();
 
   // Method called by the VideoRendererBase when a frame is available.
   virtual void OnFrameAvailable();
 
  private:
   // Only the filter factories can create instances.
   friend class media::FilterFactoryImpl1<VideoRendererImpl,
-                                         WebMediaPlayerImpl*>;
-  explicit VideoRendererImpl(WebMediaPlayerImpl* delegate);
+                                         WebMediaPlayerImpl::Proxy*>;
+  explicit VideoRendererImpl(WebMediaPlayerImpl::Proxy* proxy);
   virtual ~VideoRendererImpl() {}
 
   // Determine the conditions to perform fast paint. Returns true if we can do
   // fast paint otherwise false.
   bool CanFastPaint(skia::PlatformCanvas* canvas, const gfx::Rect& dest_rect);
 
   // Slow paint does a YUV => RGB, and scaled blit in two separate operations.
   void SlowPaint(media::VideoFrame* video_frame,
                  skia::PlatformCanvas* canvas,
                  const gfx::Rect& dest_rect);
 
   // Fast paint does YUV => RGB, scaling, blitting all in one step into the
   // canvas. It's not always safe and appropriate to perform fast paint.
   // CanFastPaint() is used to determine the conditions.
   void FastPaint(media::VideoFrame* video_frame,
                  skia::PlatformCanvas* canvas,
                  const gfx::Rect& dest_rect);
 
   void TransformToSkIRect(const SkMatrix& matrix, const gfx::Rect& src_rect,
                           SkIRect* dest_rect);
 
   // Pointer to our parent object that is called to request repaints.
-  WebMediaPlayerImpl* delegate_;
+  scoped_refptr<WebMediaPlayerImpl::Proxy> proxy_;
 
   // An RGB bitmap used to convert the video frames.
   SkBitmap bitmap_;
 
   // These two members are used to determine if the |bitmap_| contains
   // an already converted image of the current frame.  IMPORTANT NOTE:  The
   // value of |last_converted_frame_| must only be used for comparison purposes,
   // and it should be assumed that the value of the pointer is INVALID unless
   // it matches the pointer returned from GetCurrentFrame().  Even then, just
   // to make sure, we compare the timestamp to be sure the bits in the
   // |current_frame_bitmap_| are valid.
   media::VideoFrame* last_converted_frame_;
   base::TimeDelta last_converted_timestamp_;
 
   // The size of the video.
   gfx::Size video_size_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoRendererImpl);
 };
 
 }  // namespace webkit_glue
 
 #endif  // WEBKIT_GLUE_MEDIA_VIDEO_RENDERER_IMPL_H_