[WebRTC] A real ScreenCapturer test

webrtc/modules/desktop_capture/win/dxgi_output_duplicator.h

Index: webrtc/modules/desktop_capture/win/dxgi_output_duplicator.h
diff --git a/webrtc/modules/desktop_capture/win/dxgi_output_duplicator.h b/webrtc/modules/desktop_capture/win/dxgi_output_duplicator.h
index 31fb32ab9e53fb22bc9f674c5f86c645bd2cf609..b98273922c2105e44441126287b7fdefcf9eef14 100644
--- a/webrtc/modules/desktop_capture/win/dxgi_output_duplicator.h
+++ b/webrtc/modules/desktop_capture/win/dxgi_output_duplicator.h
@@ -21,9 +21,9 @@
 
 #include "webrtc/base/criticalsection.h"
 #include "webrtc/base/thread_annotations.h"
-#include "webrtc/modules/desktop_capture/desktop_frame.h"
 #include "webrtc/modules/desktop_capture/desktop_geometry.h"
 #include "webrtc/modules/desktop_capture/desktop_region.h"
+#include "webrtc/modules/desktop_capture/shared_desktop_frame.h"
 #include "webrtc/modules/desktop_capture/win/d3d_device.h"
 #include "webrtc/modules/desktop_capture/win/dxgi_texture.h"
 
@@ -60,17 +60,15 @@ class DxgiOutputDuplicator {
 
   // Copies the content of current IDXGIOutput to the |target|. To improve the
   // performance, this function copies only regions merged from
-  // |last_frame|.updated_region and DetectUpdatedRegion(). The |offset| decides
-  // the
-  // offset in the |target| where the content should be copied to. i.e. this
-  // function copies the content to the rectangle of (offset.x(), offset.y()) to
+  // |context|->updated_region and DetectUpdatedRegion(). The |offset|
+  // decides the offset in the |target| where the content should be copied to.
+  // i.e. this function copies the content to the rectangle of
+  // (offset.x(), offset.y()) to
   // (offset.x() + desktop_rect_.width(), offset.y() + desktop_rect_.height()).
-  // The |last_frame| is always expected to be translated by the same offset.
   // Returns false in case of a failure.
   bool Duplicate(Context* context,
-                 const DesktopFrame* last_frame,
                  const DesktopVector offset,
-                 DesktopFrame* target);
+                 SharedDesktopFrame* target);
 
   // Returns the desktop rect covered by this DxgiOutputDuplicator.
   DesktopRect desktop_rect() const { return desktop_rect_; }
@@ -121,6 +119,12 @@ class DxgiOutputDuplicator {
   // change this time. And during next Duplicate() function call, their
   // updated_region_ will be merged and copied.
   std::vector<Context*> contexts_;
+
+  // The last full frame of this output and its offset. If one
+  // AcquireNextFrame() failed because of timeout, i.e. no update, we can copy
+  // content from |last_frame_|.
+  std::unique_ptr<SharedDesktopFrame> last_frame_;
+  DesktopVector last_frame_offset_;
 };
 
 }  // namespace webrtc