Implement MediaCaptureDevices.

chrome/browser/media/media_capture_devices_dispatcher.h

 // Copyright (c) 2012 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 CHROME_BROWSER_MEDIA_MEDIA_CAPTURE_DEVICES_DISPATCHER_H_
 #define CHROME_BROWSER_MEDIA_MEDIA_CAPTURE_DEVICES_DISPATCHER_H_
 
 #include <deque>
 #include <list>
 #include <map>
@@ skipping 21 matching lines @@
 class PrefRegistrySyncable;
 }
 
 // This singleton is used to receive updates about media events from the content
 // layer.
 class MediaCaptureDevicesDispatcher : public content::MediaObserver,
                                       public content::NotificationObserver {
  public:
   class Observer {
    public:
-    // Handle an information update consisting of a up-to-date audio capture
-    // device lists. This happens when a microphone is plugged in or unplugged.
-    virtual void OnUpdateAudioDevices(
-        const content::MediaStreamDevices& devices) {}
-
-    // Handle an information update consisting of a up-to-date video capture
-    // device lists. This happens when a camera is plugged in or unplugged.
-    virtual void OnUpdateVideoDevices(
-        const content::MediaStreamDevices& devices) {}
-
     // Handle an information update related to a media stream request.
     virtual void OnRequestUpdate(
         int render_process_id,
         int render_view_id,
         const content::MediaStreamDevice& device,
         const content::MediaRequestState state) {}
 
     // Handle an information update that a new stream is being created.
     virtual void OnCreatingAudioStream(int render_process_id,
                                        int render_frame_id) {}
 
     virtual ~Observer() {}
   };
 
   static MediaCaptureDevicesDispatcher* GetInstance();
 
   // Registers the preferences related to Media Stream default devices.
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
 
   // Methods for observers. Called on UI thread.
   // Observers should add themselves on construction and remove themselves
   // on destruction.
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
-  const content::MediaStreamDevices& GetAudioCaptureDevices();
-  const content::MediaStreamDevices& GetVideoCaptureDevices();
 
   // Method called from WebCapturerDelegate implementations to process access
   // requests. |extension| is set to NULL if request was made from a drive-by
   // page.
   void ProcessMediaAccessRequest(
       content::WebContents* web_contents,
       const content::MediaStreamRequest& request,
       const content::MediaResponseCallback& callback,
       const extensions::Extension* extension);
 
@@ skipping 12 matching lines @@
   const content::MediaStreamDevice*
   GetRequestedAudioDevice(const std::string& requested_audio_device_id);
   const content::MediaStreamDevice*
   GetRequestedVideoDevice(const std::string& requested_video_device_id);
 
   // Returns the first available audio or video device, or NULL if no devices
   // are available.
   const content::MediaStreamDevice* GetFirstAvailableAudioDevice();
   const content::MediaStreamDevice* GetFirstAvailableVideoDevice();
 
-  // Unittests that do not require actual device enumeration should call this
-  // API on the singleton. It is safe to call this multiple times on the
-  // signleton.
-  void DisableDeviceEnumerationForTesting();
-
   // Overridden from content::MediaObserver:
-  virtual void OnAudioCaptureDevicesChanged(
-      const content::MediaStreamDevices& devices) OVERRIDE;
-  virtual void OnVideoCaptureDevicesChanged(
-      const content::MediaStreamDevices& devices) OVERRIDE;
   virtual void OnMediaRequestStateChanged(
       int render_process_id,
       int render_view_id,
       int page_request_id,
       const GURL& security_origin,
       const content::MediaStreamDevice& device,
       content::MediaRequestState state) OVERRIDE;
   virtual void OnAudioStreamPlayingChanged(
       int render_process_id,
       int render_view_id,
@@ skipping 60 matching lines @@
   void ProcessRegularMediaAccessRequest(
       content::WebContents* web_contents,
       const content::MediaStreamRequest& request,
       const content::MediaResponseCallback& callback);
   void ProcessQueuedAccessRequest(content::WebContents* web_contents);
   void OnAccessRequestResponse(content::WebContents* web_contents,
                                const content::MediaStreamDevices& devices,
                                scoped_ptr<content::MediaStreamUI> ui);
 
   // Called by the MediaObserver() functions, executed on UI thread.
-  void UpdateAudioDevicesOnUIThread(const content::MediaStreamDevices& devices);
-  void UpdateVideoDevicesOnUIThread(const content::MediaStreamDevices& devices);
   void UpdateMediaRequestStateOnUIThread(
       int render_process_id,
       int render_view_id,
       int page_request_id,
       const GURL& security_origin,
       const content::MediaStreamDevice& device,
       content::MediaRequestState state);
   void OnCreatingAudioStreamOnUIThread(int render_process_id,
                                        int render_frame_id);
 
-  // A list of cached audio capture devices.
-  content::MediaStreamDevices audio_devices_;
-
-  // A list of cached video capture devices.
-  content::MediaStreamDevices video_devices_;
-
   // A list of observers for the device update notifications.
   ObserverList<Observer> observers_;
 
-  // Flag to indicate if device enumeration has been done/doing.
-  // Only accessed on UI thread.
-  bool devices_enumerated_;
-
-  // Flag used by unittests to disable device enumeration.
-  bool is_device_enumeration_disabled_;
-
   RequestsQueues pending_requests_;
 
   scoped_refptr<MediaStreamCaptureIndicator> media_stream_capture_indicator_;
 
   scoped_refptr<AudioStreamIndicator> audio_stream_indicator_;
 
   scoped_ptr<DesktopStreamsRegistry> desktop_streams_registry_;
 
   content::NotificationRegistrar notifications_registrar_;
 
   // Tracks MEDIA_DESKTOP_VIDEO_CAPTURE sessions which reach the
   // MEDIA_REQUEST_STATE_DONE state.  Sessions are remove when
   // MEDIA_REQUEST_STATE_CLOSING is encountered.
   struct DesktopCaptureSession {
     int render_process_id;
     int render_view_id;
     int page_request_id;
   };
   typedef std::list<DesktopCaptureSession> DesktopCaptureSessions;
   DesktopCaptureSessions desktop_capture_sessions_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaCaptureDevicesDispatcher);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_MEDIA_CAPTURE_DEVICES_DISPATCHER_H_