Tab Capture: Backing store readbacks to YV12 VideoFrames.

content/browser/renderer_host/media/video_capture_controller.h

Index: content/browser/renderer_host/media/video_capture_controller.h
diff --git a/content/browser/renderer_host/media/video_capture_controller.h b/content/browser/renderer_host/media/video_capture_controller.h
index fae1cc7a2f635291f6cc657e026508bbc17b4ed0..7709091c8b6eddb36b33e647eb9fc6dd2ab21fa8 100644
--- a/content/browser/renderer_host/media/video_capture_controller.h
+++ b/content/browser/renderer_host/media/video_capture_controller.h
@@ -65,9 +65,10 @@ class CONTENT_EXPORT VideoCaptureController
                     int buffer_id);
 
   // Implement media::VideoCaptureDevice::EventHandler.
-  virtual void OnIncomingCapturedFrame(const uint8* data,
-                                       int length,
+  virtual void OnIncomingCapturedFrame(const uint8* data, int length,
                                        base::Time timestamp) OVERRIDE;
+  virtual void OnIncomingCapturedVideoFrame(media::VideoFrame* frame,
+                                            base::Time timestamp) OVERRIDE;
   virtual void OnError() OVERRIDE;
   virtual void OnFrameInfo(
       const media::VideoCaptureCapability& info) OVERRIDE;
@@ -93,22 +94,32 @@ class CONTENT_EXPORT VideoCaptureController
   // Send frame info and init buffers to |client|.
   void SendFrameInfoAndBuffers(ControllerClient* client, int buffer_size);
 
-  // Helpers.
   // Find a client of |id| and |handler| in |clients|.
   ControllerClient* FindClient(
       const VideoCaptureControllerID& id,
       VideoCaptureControllerEventHandler* handler,
       const ControllerClients& clients);
+
   // Find a client of |session_id| in |clients|.
   ControllerClient* FindClient(
       int session_id,
       const ControllerClients& clients);
+
   // Decide what to do after kStopping state. Dependent on events, controller
   // can stay in kStopping state, or go to kStopped, or restart capture.
   void PostStopping();
+
   // Check if any DIB is used by client.
   bool ClientHasDIB();
 
+  // DIB reservation. Locate an available DIB object, reserve it, and provide
+  // the caller the reserved DIB's buffer_id as well as pointers to its color
+  // planes. Returns true if successful.
+  bool ReserveSharedMemory(int* buffer_id_out,
+                           uint8** yplane,
+                           uint8** uplane,
+                           uint8** vplane);
+
   // Lock to protect free_dibs_ and owned_dibs_.
   base::Lock lock_;