Wrap ScreenCapturer with ScreenCapturerDifferWrapper

webrtc/modules/desktop_capture/screen_capturer_x11.cc

 /*
  *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #include "webrtc/modules/desktop_capture/screen_capturer.h"
 
 #include <string.h>
 
 #include <memory>
 #include <set>
+#include <utility>
 
 #include <X11/extensions/Xdamage.h>
 #include <X11/extensions/Xfixes.h>
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
 
 #include "webrtc/base/checks.h"
 #include "webrtc/base/constructormagic.h"
 #include "webrtc/base/timeutils.h"
 #include "webrtc/modules/desktop_capture/desktop_capture_options.h"
 #include "webrtc/modules/desktop_capture/desktop_frame.h"
 #include "webrtc/modules/desktop_capture/differ.h"
 #include "webrtc/modules/desktop_capture/screen_capture_frame_queue.h"
+#include "webrtc/modules/desktop_capture/screen_capturer_differ_wrapper.h"
 #include "webrtc/modules/desktop_capture/screen_capturer_helper.h"
 #include "webrtc/modules/desktop_capture/shared_desktop_frame.h"
 #include "webrtc/modules/desktop_capture/x11/x_server_pixel_buffer.h"
 #include "webrtc/system_wrappers/include/logging.h"
 
 namespace webrtc {
 namespace {
 
 // A class to perform video frame capturing for Linux.
 class ScreenCapturerLinux : public ScreenCapturer,
@@ skipping 379 matching lines @@
   }
 }
 
 }  // namespace
 
 // static
 ScreenCapturer* ScreenCapturer::Create(const DesktopCaptureOptions& options) {
   if (!options.x_display())
     return nullptr;
 
-  std::unique_ptr<ScreenCapturerLinux> capturer(new ScreenCapturerLinux());
-  if (!capturer->Init(options))
-    capturer.reset();
+  std::unique_ptr<ScreenCapturer> capturer(new ScreenCapturerLinux());
+  if (!static_cast<ScreenCapturerLinux*>(capturer.get())->Init(options)) {
+    return nullptr;
+  }
+
+  if (options.detect_updated_region()) {
+    capturer.reset(new ScreenCapturerDifferWrapper(std::move(capturer)));
+  }
+
   return capturer.release();
 }
 
 }  // namespace webrtc