Adding MediaStreamManager.

content/browser/renderer_host/media/video_capture_manager.h

 // Copyright (c) 2011 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.
 
 // VideoCaptureManager is used to open/close, start/stop as well as enumerate
 // available video capture devices. All functions are expected to be called from
 // the Browser::IO thread. VideoCaptureManager will open OS dependent instances
 // of VideoCaptureDevice. A device can only be opened once.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_MANAGER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_MANAGER_H_
 
 #include <map>
 
-#include "base/lazy_instance.h"
 #include "base/threading/thread.h"
 #include "content/browser/renderer_host/media/media_stream_provider.h"
 #include "content/common/media/media_stream_options.h"
 #include "media/video/capture/video_capture_device.h"
 #include "media/video/capture/video_capture_types.h"
 
 namespace media_stream {
 
 // VideoCaptureManager opens/closes and start/stops video capture devices.
 class VideoCaptureManager : public MediaStreamProvider {
  public:
   // Calling |Start| of this id will open the first device, even though open has
   // not been called. This is used to be able to use video capture devices
   // before MediaStream is implemented in Chrome and WebKit.
   enum { kStartOpenSessionId = 1 };
 
-  // Called to get a pointer to the singleton.
-  static VideoCaptureManager* Get();
+  VideoCaptureManager();
+  virtual ~VideoCaptureManager();
 
   // Implements MediaStreamProvider.
   virtual void Register(MediaStreamProviderListener* listener);
 
   virtual void Unregister();
 
   virtual void EnumerateDevices();
 
   virtual int Open(const StreamDeviceInfo& device);
 
   virtual void Close(int capture_session_id);
 
   // Functions used to start and stop media flow.
   // Start allocates the device and no other application can use the device
   // before Stop is called. Captured video frames will be delivered to
   // video_capture_receiver.
   void Start(const media::VideoCaptureParams& capture_params,
              media::VideoCaptureDevice::EventHandler* video_capture_receiver);
 
   // Stops capture device referenced by |capture_session_id|. No more frames
   // will be delivered to the frame receiver, and |stopped_task| will be called.
   void Stop(const media::VideoCaptureSessionId& capture_session_id,
             Task* stopped_task);
 
   // A capture device error has occurred for |capture_session_id|. The device
   // won't stream any more captured frames.
   void Error(const media::VideoCaptureSessionId& capture_session_id);
 
-  virtual ~VideoCaptureManager();
-
   // Used by unit test to make sure a fake device is used instead of a real
   // video capture device. Due to timing requirements, the function must be
   // called before EnumerateDevices and Open.
   void UseFakeDevice();
   MessageLoop* GetMessageLoop();
 
  private:
-  friend struct base::DefaultLazyInstanceTraits<VideoCaptureManager>;
-
-  VideoCaptureManager();
-
   // Called by the public functions, executed on vc_device_thread_.
   void OnEnumerateDevices();
   void OnOpen(int capture_session_id, const StreamDeviceInfo& device);
   void OnClose(int capture_session_id);
   void OnStart(const media::VideoCaptureParams capture_params,
                media::VideoCaptureDevice::EventHandler* video_capture_receiver);
   void OnStop(const media::VideoCaptureSessionId capture_session_id,
               Task* stopped_task);
 
   // Executed on Browser::IO thread to call Listener.
@@ skipping 32 matching lines @@
   bool use_fake_device_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureManager);
 };
 
 }  // namespace media_stream
 
 DISABLE_RUNNABLE_METHOD_REFCOUNT(media_stream::VideoCaptureManager);
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_MANAGER_H_