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      1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CONTENT_BROWSER_MEDIA_CAPTURE_DESKTOP_CAPTURE_DEVICE_H_
      6 #define CONTENT_BROWSER_MEDIA_CAPTURE_DESKTOP_CAPTURE_DEVICE_H_
      7 
      8 #include "base/memory/ref_counted.h"
      9 #include "base/memory/scoped_ptr.h"
     10 #include "base/threading/thread.h"
     11 #include "content/common/content_export.h"
     12 #include "content/public/browser/desktop_media_id.h"
     13 #include "media/video/capture/video_capture_device.h"
     14 #include "ui/gfx/native_widget_types.h"
     15 
     16 namespace base {
     17 class SingleThreadTaskRunner;
     18 class Thread;
     19 }  // namespace base
     20 
     21 namespace webrtc {
     22 class DesktopCapturer;
     23 }  // namespace webrtc
     24 
     25 namespace content {
     26 
     27 // DesktopCaptureDevice implements VideoCaptureDevice for screens and windows.
     28 // It's essentially an adapter between webrtc::DesktopCapturer and
     29 // VideoCaptureDevice.
     30 class CONTENT_EXPORT DesktopCaptureDevice : public media::VideoCaptureDevice {
     31  public:
     32   // Creates capturer for the specified |source| and then creates
     33   // DesktopCaptureDevice for it. May return NULL in case of a failure (e.g. if
     34   // requested window was destroyed).
     35   static scoped_ptr<media::VideoCaptureDevice> Create(
     36       const DesktopMediaID& source);
     37 
     38   virtual ~DesktopCaptureDevice();
     39 
     40   // VideoCaptureDevice interface.
     41   virtual void AllocateAndStart(const media::VideoCaptureParams& params,
     42                                 scoped_ptr<Client> client) OVERRIDE;
     43   virtual void StopAndDeAllocate() OVERRIDE;
     44 
     45   // Set the platform-dependent window id for the notification window.
     46   void SetNotificationWindowId(gfx::NativeViewId window_id);
     47 
     48  private:
     49   friend class DesktopCaptureDeviceTest;
     50   class Core;
     51 
     52   DesktopCaptureDevice(scoped_ptr<webrtc::DesktopCapturer> desktop_capturer,
     53                        DesktopMediaID::Type type);
     54 
     55   base::Thread thread_;
     56   scoped_ptr<Core> core_;
     57 
     58   DISALLOW_COPY_AND_ASSIGN(DesktopCaptureDevice);
     59 };
     60 
     61 }  // namespace content
     62 
     63 #endif  // CONTENT_BROWSER_MEDIA_CAPTURE_DESKTOP_CAPTURE_DEVICE_H_
     64