Begin adding support for tab mirroring via the MediaStream audio/video capturing

content/browser/renderer_host/media/audio_input_device_manager.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.
 //
 // AudioInputDeviceManager manages the audio input devices. In particular it
 // communicates with MediaStreamManager and AudioInputRendererHost on the
 // browser IO thread, handles queries like enumerate/open/close from
 // MediaStreamManager and start/stop from AudioInputRendererHost.
 // The work for enumerate/open/close is handled asynchronously on Media Stream
 // device thread, while start/stop are synchronous on the IO thread.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_DEVICE_MANAGER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_DEVICE_MANAGER_H_
 
 #include <map>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/threading/thread.h"
 #include "content/browser/renderer_host/media/media_stream_provider.h"
 #include "content/common/content_export.h"
 #include "content/common/media/media_stream_options.h"
-#include "media/audio/audio_device_name.h"
+#include "content/public/common/media_stream_request.h"
 
 namespace media {
 class AudioManager;
 }
 
 namespace media_stream {
 
 class AudioInputDeviceManagerEventHandler;
 
-class CONTENT_EXPORT AudioInputDeviceManager
-    : public base::RefCountedThreadSafe<AudioInputDeviceManager>,
-      public MediaStreamProvider {
+class CONTENT_EXPORT AudioInputDeviceManager : public MediaStreamProvider {
  public:
   // Calling Start() with this kFakeOpenSessionId will open the default device,
   // even though Open() has not been called. This is used to be able to use the
   // AudioInputDeviceManager before MediaStream is implemented.
   static const int kFakeOpenSessionId;
 
   explicit AudioInputDeviceManager(media::AudioManager* audio_manager);
 
   // MediaStreamProvider implementation, called on IO thread.
   virtual void Register(MediaStreamProviderListener* listener,
                         base::MessageLoopProxy* device_thread_loop) OVERRIDE;
   virtual void Unregister() OVERRIDE;
   virtual void EnumerateDevices() OVERRIDE;
   virtual int Open(const StreamDeviceInfo& device) OVERRIDE;
   virtual void Close(int session_id) OVERRIDE;
 
   // Functions used by AudioInputRenderHost, called on IO thread.
   // Starts the device referenced by the session id.
   void Start(int session_id, AudioInputDeviceManagerEventHandler* handler);
   // Stops the device referenced by the session id.
   void Stop(int session_id);
 
  private:
   typedef std::map<int, AudioInputDeviceManagerEventHandler*> EventHandlerMap;
-  typedef std::map<int, media::AudioDeviceName> AudioInputDeviceMap;
-
-  friend class base::RefCountedThreadSafe<AudioInputDeviceManager>;
+  typedef std::map<int, StreamDeviceInfo> StreamDeviceMap;
   virtual ~AudioInputDeviceManager();
 
   // Enumerates audio input devices on media stream device thread.
   void EnumerateOnDeviceThread();
   // Opens the device on media stream device thread.
   void OpenOnDeviceThread(int session_id, const StreamDeviceInfo& device);
   // Closes the deivce on the media stream device thread.
   void CloseOnDeviceThread(int session_id);
 
   // Callback used by EnumerateOnDeviceThread(), called with a list of
   // enumerated devices on IO thread.
   void DevicesEnumeratedOnIOThread(StreamDeviceInfoArray* devices);
   // Callback used by OpenOnDeviceThread(), called with the session_id
   // referencing the opened device on IO thread.
-  void OpenedOnIOThread(int session_id);
+  void OpenedOnIOThread(content::MediaStreamDeviceType type, int session_id);
   // Callback used by CloseOnDeviceThread(), called with the session_id
   // referencing the closed device on IO thread.
-  void ClosedOnIOThread(int session_id);
+  void ClosedOnIOThread(content::MediaStreamDeviceType type, int session_id);
 
   // Verifies that the calling thread is media stream device thread.
   bool IsOnDeviceThread() const;
 
   // Only accessed on Browser::IO thread.
   MediaStreamProviderListener* listener_;
   int next_capture_session_id_;
   EventHandlerMap event_handlers_;
 
   // Only accessed from media stream device thread.
-  AudioInputDeviceMap devices_;
-  media::AudioManager* audio_manager_;
+  StreamDeviceMap devices_;
+  media::AudioManager* const audio_manager_;
 
   // The message loop of media stream device thread that this object runs on.
   scoped_refptr<base::MessageLoopProxy> device_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioInputDeviceManager);
 };
 
 }  // namespace media_stream
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_DEVICE_MANAGER_H_