text: // Copyright 2014 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 REMOTING_HOST_FAKE_DESKTOP_CAPTURER_H_
  #define REMOTING_HOST_FAKE_DESKTOP_CAPTURER_H_
  
  #include "base/callback.h"
  #include "base/memory/scoped_ptr.h"
  #include "media/base/media_export.h"
  #include "third_party/webrtc/modules/desktop_capture/desktop_capturer.h"
  #include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
  #include "third_party/webrtc/modules/desktop_capture/screen_capture_frame_queue.h"
  
  namespace remoting {
  
  // A FakeDesktopCapturer generates artificial image for testing purpose.
  //
  // FakeDesktopCapturer is double-buffered as required by DesktopCapturer.
  class FakeDesktopCapturer : public webrtc::DesktopCapturer {
   public:
    // By default FakeDesktopCapturer generates frames of size kWidth x kHeight,
    // but custom frame generator set using set_frame_generator() may generate
    // frames of different size.
    static const int kWidth = 800;
    static const int kHeight = 600;
  
    typedef base::Callback<scoped_ptr<webrtc::DesktopFrame>(
        webrtc::DesktopCapturer::Callback* callback)> FrameGenerator;
  
    FakeDesktopCapturer();
    virtual ~FakeDesktopCapturer();
  
    void set_frame_generator(const FrameGenerator& frame_generator);
  
    // webrtc::DesktopCapturer interface.
    virtual void Start(Callback* callback) OVERRIDE;
    virtual void Capture(const webrtc::DesktopRegion& rect) OVERRIDE;
  
   private:
    FrameGenerator frame_generator_;
  
    Callback* callback_;
  
    DISALLOW_COPY_AND_ASSIGN(FakeDesktopCapturer);
  };
  
  }  // namespace remoting
  
  #endif  // REMOTING_HOST_FAKE_DESKTOP_CAPTURER_H_
  