cc: Recycle resources for software video decode.

cc/resources/video_resource_updater.h

 // Copyright 2013 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 CC_RESOURCES_VIDEO_RESOURCE_UPDATER_H_
 #define CC_RESOURCES_VIDEO_RESOURCE_UPDATER_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
 #include "cc/resources/texture_mailbox.h"
+#include "ui/gfx/size.h"
 
 namespace media {
 class SkCanvasVideoRenderer;
 class VideoFrame;
 }
 
 namespace cc {
 class ResourceProvider;
 
 class VideoFrameExternalResources {
@@ skipping 24 matching lines @@
   // TODO(danakj): Remove these too.
   std::vector<unsigned> software_resources;
   TextureMailbox::ReleaseCallback software_release_callback;
 
   VideoFrameExternalResources();
   ~VideoFrameExternalResources();
 };
 
 // VideoResourceUpdater is by the video system to produce frame content as
 // resources consumable by the compositor.
-class VideoResourceUpdater {
+class VideoResourceUpdater
+    : public base::SupportsWeakPtr<VideoResourceUpdater> {
  public:
   explicit VideoResourceUpdater(ResourceProvider* resource_provider);
   ~VideoResourceUpdater();
 
   VideoFrameExternalResources CreateForHardwarePlanes(
       const scoped_refptr<media::VideoFrame>& video_frame,
       const TextureMailbox::ReleaseCallback& release_callback);
 
   VideoFrameExternalResources CreateForSoftwarePlanes(
       const scoped_refptr<media::VideoFrame>& video_frame);
 
  private:
+  struct PlaneResource {
+    unsigned resource_id;
+    gfx::Size resource_size;
+    unsigned resource_format;
+    unsigned sync_point;
+
+    PlaneResource(unsigned resource_id,
+                  gfx::Size resource_size,
+                  unsigned resource_format,
+                  unsigned sync_point)
+        : resource_id(resource_id),
+          resource_size(resource_size),
+          resource_format(resource_format),
+          sync_point(sync_point) {}
+  };
+
   bool VerifyFrame(const scoped_refptr<media::VideoFrame>& video_frame);
 
+  static void RecycleResource(base::WeakPtr<VideoResourceUpdater> updater,
+                              ResourceProvider* resource_provider,
+                              unsigned resource_id,
+                              gfx::Size resource_size,
+                              unsigned resource_format,
+                              gpu::Mailbox mailbox,
+                              unsigned sync_point);
   static void ReturnTexture(ResourceProvider* resource_provider,
                             TextureMailbox::ReleaseCallback callback,
                             unsigned texture_id,
                             gpu::Mailbox mailbox,
                             unsigned sync_point);
 
   ResourceProvider* resource_provider_;
   scoped_ptr<media::SkCanvasVideoRenderer> video_renderer_;
 
+  std::vector<PlaneResource> recycled_resources_;
+
   DISALLOW_COPY_AND_ASSIGN(VideoResourceUpdater);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_VIDEO_RESOURCE_UPDATER_H_