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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_RENDERER_HOST_MEDIA_DESKTOP_CAPTURE_DEVICE_H_
      6 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_DESKTOP_CAPTURE_DEVICE_H_
      7 
      8 #include "base/memory/ref_counted.h"
      9 #include "base/memory/scoped_ptr.h"
     10 #include "content/common/content_export.h"
     11 #include "media/video/capture/video_capture_device.h"
     12 
     13 namespace base {
     14 class SequencedTaskRunner;
     15 }  // namespace base
     16 
     17 namespace webrtc {
     18 class DesktopCapturer;
     19 }  // namespace webrtc
     20 
     21 namespace content {
     22 
     23 struct DesktopMediaID;
     24 
     25 // DesktopCaptureDevice implements VideoCaptureDevice for screens and windows.
     26 // It's essentially an adapter between webrtc::DesktopCapturer and
     27 // VideoCaptureDevice.
     28 class CONTENT_EXPORT DesktopCaptureDevice : public media::VideoCaptureDevice {
     29  public:
     30   // Creates capturer for the specified |source| and then creates
     31   // DesktopCaptureDevice for it. May return NULL in case of a failure (e.g. if
     32   // requested window was destroyed).
     33   static scoped_ptr<media::VideoCaptureDevice> Create(
     34       const DesktopMediaID& source);
     35 
     36   DesktopCaptureDevice(scoped_refptr<base::SequencedTaskRunner> task_runner,
     37                        scoped_ptr<webrtc::DesktopCapturer> desktop_capturer);
     38   virtual ~DesktopCaptureDevice();
     39 
     40   // VideoCaptureDevice interface.
     41   virtual void Allocate(const media::VideoCaptureCapability& capture_format,
     42                         EventHandler* observer) OVERRIDE;
     43   virtual void Start() OVERRIDE;
     44   virtual void Stop() OVERRIDE;
     45   virtual void DeAllocate() OVERRIDE;
     46   virtual const Name& device_name() OVERRIDE;
     47 
     48  private:
     49   class Core;
     50   scoped_refptr<Core> core_;
     51   Name name_;
     52 
     53   DISALLOW_COPY_AND_ASSIGN(DesktopCaptureDevice);
     54 };
     55 
     56 }  // namespace content
     57 
     58 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_DESKTOP_CAPTURE_DEVICE_H_
     59