content/browser/renderer_host/media/screen_capture_device.h

// Copyright (c) 2013 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 CONTENT_BROWSER_RENDERER_HOST_MEDIA_SCREEN_CAPTURE_DEVICE_H_
#define CONTENT_BROWSER_RENDERER_HOST_MEDIA_SCREEN_CAPTURE_DEVICE_H_

#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "content/common/content_export.h"
#include "media/video/capture/video_capture_device.h"

namespace base {
class SequencedTaskRunner;
}  // namespace base

namespace webrtc {
class ScreenCapturer;
}  // namespace webrtc

namespace content {

// ScreenCaptureDevice implements VideoCaptureDevice for the screen. It's
// essentially an adapter between ScreenCapturer and VideoCaptureDevice.
class CONTENT_EXPORT ScreenCaptureDevice : public media::VideoCaptureDevice {
 public:
  explicit ScreenCaptureDevice(
      scoped_refptr<base::SequencedTaskRunner> task_runner);
  virtual ~ScreenCaptureDevice();

  // Helper used in tests to supply a fake capturer.
  void SetScreenCapturerForTest(
      scoped_ptr<webrtc::ScreenCapturer> capturer);

  // VideoCaptureDevice interface.
  virtual void Allocate(const media::VideoCaptureCapability& capture_format,
                        EventHandler* observer) OVERRIDE;
  virtual void Start() OVERRIDE;
  virtual void Stop() OVERRIDE;
  virtual void DeAllocate() OVERRIDE;
  virtual const Name& device_name() OVERRIDE;

 private:
  class Core;
  scoped_refptr<Core> core_;
  Name name_;

  DISALLOW_COPY_AND_ASSIGN(ScreenCaptureDevice);
};

}  // namespace content

#endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_SCREEN_CAPTURE_DEVICE_H_