Add DesktopCapturer GetSourceList SelectSource FocusOnSelectedSource functions

webrtc/modules/desktop_capture/screen_capturer.h

 /*
  *  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.
  */
 
 #ifndef WEBRTC_MODULES_DESKTOP_CAPTURE_SCREEN_CAPTURER_H_
 #define WEBRTC_MODULES_DESKTOP_CAPTURE_SCREEN_CAPTURER_H_
 
 #include <vector>
 
 #include "webrtc/modules/desktop_capture/desktop_capture_types.h"
 #include "webrtc/modules/desktop_capture/desktop_capturer.h"
 #include "webrtc/typedefs.h"
 
 namespace webrtc {
 
 class DesktopCaptureOptions;
 
+// TODO(zijiehe): Remove this class.
 // Class used to capture video frames asynchronously.
 //
 // The full capture sequence is as follows:
 //
 // (1) Start
 //     This is when pre-capture steps are executed, such as flagging the
 //     display to prevent it from sleeping during a session.
 //
 // (2) CaptureFrame
 //     This is where the bits for the invalid rects are packaged up and sent
 //     to the encoder.
 //     A screen capture is performed if needed. For example, Windows requires
 //     a capture to calculate the diff from the previous screen, whereas the
 //     Mac version does not.
 //
 // Implementation has to ensure the following guarantees:
 // 1. Double buffering
 //    Since data can be read while another capture action is happening.
 class ScreenCapturer : public DesktopCapturer {
  public:
   // Use a struct to represent a screen although it has only an id for now,
   // because we may want to add more fields (e.g. description) in the future.
   struct Screen {
     ScreenId id;
   };
   typedef std::vector<Screen> ScreenList;
 
-  ~ScreenCapturer() override {}
+  ~ScreenCapturer() override;
 
   // Creates a platform-specific capturer.
   static ScreenCapturer* Create(const DesktopCaptureOptions& options);
 
+  // Deprecated, use GetSourceList().
   // Get the list of screens (not containing kFullDesktopScreenId). Returns
   // false in case of a failure.
-  virtual bool GetScreenList(ScreenList* screens) = 0;
+  virtual bool GetScreenList(ScreenList* screens);
 
+  // Deprecated, use SelectSource().
   // Select the screen to be captured. Returns false in case of a failure (e.g.
   // if there is no screen with the specified id). If this is never called, the
   // full desktop is captured.
-  virtual bool SelectScreen(ScreenId id) = 0;
+  virtual bool SelectScreen(ScreenId id);
+
+  // DesktopCapturer interfaces.
+  bool GetSourceList(SourceList* sources) override;
+  bool SelectSource(SourceId id) override;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_DESKTOP_CAPTURE_SCREEN_CAPTURER_H_